13b3a8eb9SGleb Smirnoff /*- 23b3a8eb9SGleb Smirnoff * Copyright (c) 2004 Ruslan Ermilov and Vsevolod Lobko. 33b3a8eb9SGleb Smirnoff * 43b3a8eb9SGleb Smirnoff * Redistribution and use in source and binary forms, with or without 53b3a8eb9SGleb Smirnoff * modification, are permitted provided that the following conditions 63b3a8eb9SGleb Smirnoff * are met: 73b3a8eb9SGleb Smirnoff * 1. Redistributions of source code must retain the above copyright 83b3a8eb9SGleb Smirnoff * notice, this list of conditions and the following disclaimer. 93b3a8eb9SGleb Smirnoff * 2. Redistributions in binary form must reproduce the above copyright 103b3a8eb9SGleb Smirnoff * notice, this list of conditions and the following disclaimer in the 113b3a8eb9SGleb Smirnoff * documentation and/or other materials provided with the distribution. 123b3a8eb9SGleb Smirnoff * 133b3a8eb9SGleb Smirnoff * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 143b3a8eb9SGleb Smirnoff * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 153b3a8eb9SGleb Smirnoff * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 163b3a8eb9SGleb Smirnoff * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 173b3a8eb9SGleb Smirnoff * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 183b3a8eb9SGleb Smirnoff * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 193b3a8eb9SGleb Smirnoff * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 203b3a8eb9SGleb Smirnoff * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 213b3a8eb9SGleb Smirnoff * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 223b3a8eb9SGleb Smirnoff * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 233b3a8eb9SGleb Smirnoff * SUCH DAMAGE. 243b3a8eb9SGleb Smirnoff */ 253b3a8eb9SGleb Smirnoff 263b3a8eb9SGleb Smirnoff #include <sys/cdefs.h> 273b3a8eb9SGleb Smirnoff __FBSDID("$FreeBSD$"); 283b3a8eb9SGleb Smirnoff 293b3a8eb9SGleb Smirnoff /* 30563b5ab1SAlexander V. Chernikov * Lookup table support for ipfw. 313b3a8eb9SGleb Smirnoff * 32ac35ff17SAlexander V. Chernikov * This file contains handlers for all generic tables' operations: 33563b5ab1SAlexander V. Chernikov * add/del/flush entries, list/dump tables etc.. 343b3a8eb9SGleb Smirnoff * 35563b5ab1SAlexander V. Chernikov * Table data modification is protected by both UH and runtimg lock 36563b5ab1SAlexander V. Chernikov * while reading configuration/data is protected by UH lock. 37563b5ab1SAlexander V. Chernikov * 38563b5ab1SAlexander V. Chernikov * Lookup algorithms for all table types are located in ip_fw_table_algo.c 393b3a8eb9SGleb Smirnoff */ 403b3a8eb9SGleb Smirnoff 413b3a8eb9SGleb Smirnoff #include "opt_ipfw.h" 423b3a8eb9SGleb Smirnoff 433b3a8eb9SGleb Smirnoff #include <sys/param.h> 443b3a8eb9SGleb Smirnoff #include <sys/systm.h> 453b3a8eb9SGleb Smirnoff #include <sys/malloc.h> 463b3a8eb9SGleb Smirnoff #include <sys/kernel.h> 473b3a8eb9SGleb Smirnoff #include <sys/lock.h> 483b3a8eb9SGleb Smirnoff #include <sys/rwlock.h> 493b3a8eb9SGleb Smirnoff #include <sys/socket.h> 50f1220db8SAlexander V. Chernikov #include <sys/socketvar.h> 513b3a8eb9SGleb Smirnoff #include <sys/queue.h> 523b3a8eb9SGleb Smirnoff #include <net/if.h> /* ip_fw.h requires IFNAMSIZ */ 533b3a8eb9SGleb Smirnoff 543b3a8eb9SGleb Smirnoff #include <netinet/in.h> 553b3a8eb9SGleb Smirnoff #include <netinet/ip_var.h> /* struct ipfw_rule_ref */ 563b3a8eb9SGleb Smirnoff #include <netinet/ip_fw.h> 573b3a8eb9SGleb Smirnoff 583b3a8eb9SGleb Smirnoff #include <netpfil/ipfw/ip_fw_private.h> 59ea761a5dSAlexander V. Chernikov #include <netpfil/ipfw/ip_fw_table.h> 603b3a8eb9SGleb Smirnoff 613b3a8eb9SGleb Smirnoff /* 62b074b7bbSAlexander V. Chernikov * Table has the following `type` concepts: 63b074b7bbSAlexander V. Chernikov * 649f7d47b0SAlexander V. Chernikov * `no.type` represents lookup key type (cidr, ifp, uid, etc..) 6535e1bbd0SAlexander V. Chernikov * `vtype` represents table value type (currently U32) 669490a627SAlexander V. Chernikov * `ftype` (at the moment )is pure userland field helping to properly 679490a627SAlexander V. Chernikov * format value data e.g. "value is IPv4 nexthop" or "value is DSCP" 689490a627SAlexander V. Chernikov * or "value is port". 69b074b7bbSAlexander V. Chernikov * 70b074b7bbSAlexander V. Chernikov */ 71b074b7bbSAlexander V. Chernikov struct table_config { 72b074b7bbSAlexander V. Chernikov struct named_object no; 73adf3b2b9SAlexander V. Chernikov uint8_t vtype; /* value type */ 74adf3b2b9SAlexander V. Chernikov uint8_t vftype; /* value format type */ 75914bffb6SAlexander V. Chernikov uint8_t tflags; /* type flags */ 764f43138aSAlexander V. Chernikov uint8_t locked; /* 1 if locked from changes */ 77b074b7bbSAlexander V. Chernikov uint32_t count; /* Number of records */ 784c0c07a5SAlexander V. Chernikov uint32_t limit; /* Max number of records */ 79adf3b2b9SAlexander V. Chernikov uint8_t linked; /* 1 if already linked */ 80adf3b2b9SAlexander V. Chernikov uint8_t ochanged; /* used by set swapping */ 81adf3b2b9SAlexander V. Chernikov uint16_t spare1; 82adf3b2b9SAlexander V. Chernikov uint32_t spare2; 83a73d728dSAlexander V. Chernikov uint32_t ocount; /* used by set swapping */ 84a73d728dSAlexander V. Chernikov uint64_t gencnt; /* generation count */ 85b074b7bbSAlexander V. Chernikov char tablename[64]; /* table name */ 869f7d47b0SAlexander V. Chernikov struct table_algo *ta; /* Callbacks for given algo */ 879f7d47b0SAlexander V. Chernikov void *astate; /* algorithm state */ 889f7d47b0SAlexander V. Chernikov struct table_info ti; /* data to put to table_info */ 89b074b7bbSAlexander V. Chernikov }; 90b074b7bbSAlexander V. Chernikov 91b074b7bbSAlexander V. Chernikov struct tables_config { 92b074b7bbSAlexander V. Chernikov struct namedobj_instance *namehash; 939f7d47b0SAlexander V. Chernikov int algo_count; 949f7d47b0SAlexander V. Chernikov struct table_algo *algo[256]; 9557a1cf95SAlexander V. Chernikov struct table_algo *def_algo[IPFW_TABLE_MAXTYPE + 1]; 96b074b7bbSAlexander V. Chernikov }; 97b074b7bbSAlexander V. Chernikov 98b074b7bbSAlexander V. Chernikov static struct table_config *find_table(struct namedobj_instance *ni, 99b074b7bbSAlexander V. Chernikov struct tid_info *ti); 10068394ec8SAlexander V. Chernikov static struct table_config *alloc_table_config(struct ip_fw_chain *ch, 101914bffb6SAlexander V. Chernikov struct tid_info *ti, struct table_algo *ta, char *adata, uint8_t tflags, 102914bffb6SAlexander V. Chernikov uint8_t vtype); 103b074b7bbSAlexander V. Chernikov static void free_table_config(struct namedobj_instance *ni, 104b074b7bbSAlexander V. Chernikov struct table_config *tc); 105db785d31SAlexander V. Chernikov static int create_table_internal(struct ip_fw_chain *ch, struct tid_info *ti, 1060468c5baSAlexander V. Chernikov char *aname, ipfw_xtable_info *i, struct table_config **ptc, 1070468c5baSAlexander V. Chernikov struct table_algo **pta, uint16_t *pkidx, int ref); 1080468c5baSAlexander V. Chernikov static void link_table(struct ip_fw_chain *ch, struct table_config *tc); 1090468c5baSAlexander V. Chernikov static void unlink_table(struct ip_fw_chain *ch, struct table_config *tc); 110b074b7bbSAlexander V. Chernikov static void free_table_state(void **state, void **xstate, uint8_t type); 1112d99a349SAlexander V. Chernikov static int export_tables(struct ip_fw_chain *ch, ipfw_obj_lheader *olh, 1122d99a349SAlexander V. Chernikov struct sockopt_data *sd); 113ac35ff17SAlexander V. Chernikov static void export_table_info(struct ip_fw_chain *ch, struct table_config *tc, 114ac35ff17SAlexander V. Chernikov ipfw_xtable_info *i); 11581d3153dSAlexander V. Chernikov static int dump_table_tentry(void *e, void *arg); 116f1220db8SAlexander V. Chernikov static int dump_table_xentry(void *e, void *arg); 117b074b7bbSAlexander V. Chernikov 1182d99a349SAlexander V. Chernikov static int ipfw_dump_table_v0(struct ip_fw_chain *ch, struct sockopt_data *sd); 1192d99a349SAlexander V. Chernikov static int ipfw_dump_table_v1(struct ip_fw_chain *ch, struct sockopt_data *sd); 120db785d31SAlexander V. Chernikov static int ipfw_manage_table_ent_v0(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 121ac35ff17SAlexander V. Chernikov struct sockopt_data *sd); 122db785d31SAlexander V. Chernikov static int ipfw_manage_table_ent_v1(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 123ac35ff17SAlexander V. Chernikov struct sockopt_data *sd); 124a73d728dSAlexander V. Chernikov static int swap_tables(struct ip_fw_chain *ch, struct tid_info *a, 12546d52008SAlexander V. Chernikov struct tid_info *b); 126ac35ff17SAlexander V. Chernikov 127b6ee846eSAlexander V. Chernikov static int check_table_space(struct ip_fw_chain *ch, struct table_config *tc, 128b6ee846eSAlexander V. Chernikov struct table_info *ti, uint32_t count); 129ac35ff17SAlexander V. Chernikov static int destroy_table(struct ip_fw_chain *ch, struct tid_info *ti); 130d3a4f924SAlexander V. Chernikov 1319f7d47b0SAlexander V. Chernikov static struct table_algo *find_table_algo(struct tables_config *tableconf, 1329490a627SAlexander V. Chernikov struct tid_info *ti, char *name); 133b074b7bbSAlexander V. Chernikov 13446d52008SAlexander V. Chernikov static void objheader_to_ti(struct _ipfw_obj_header *oh, struct tid_info *ti); 13546d52008SAlexander V. Chernikov static void ntlv_to_ti(struct _ipfw_obj_ntlv *ntlv, struct tid_info *ti); 136a73d728dSAlexander V. Chernikov static int classify_table_opcode(ipfw_insn *cmd, uint16_t *puidx, uint8_t *ptype); 13746d52008SAlexander V. Chernikov 138b074b7bbSAlexander V. Chernikov #define CHAIN_TO_TCFG(chain) ((struct tables_config *)(chain)->tblcfg) 139b074b7bbSAlexander V. Chernikov #define CHAIN_TO_NI(chain) (CHAIN_TO_TCFG(chain)->namehash) 1409f7d47b0SAlexander V. Chernikov #define KIDX_TO_TI(ch, k) (&(((struct table_info *)(ch)->tablestate)[k])) 141b074b7bbSAlexander V. Chernikov 142b6ee846eSAlexander V. Chernikov #define TA_BUF_SZ 128 /* On-stack buffer for add/delete state */ 143b6ee846eSAlexander V. Chernikov 1443a845e10SAlexander V. Chernikov /* 1453a845e10SAlexander V. Chernikov * Checks if we're able to insert/update entry @tei into table 1463a845e10SAlexander V. Chernikov * w.r.t @tc limits. 1473a845e10SAlexander V. Chernikov * May alter @tei to indicate insertion error / insert 1483a845e10SAlexander V. Chernikov * options. 1493a845e10SAlexander V. Chernikov * 1503a845e10SAlexander V. Chernikov * Returns 0 if operation can be performed/ 1513a845e10SAlexander V. Chernikov */ 1523a845e10SAlexander V. Chernikov static int 1533a845e10SAlexander V. Chernikov check_table_limit(struct table_config *tc, struct tentry_info *tei) 1543a845e10SAlexander V. Chernikov { 155b074b7bbSAlexander V. Chernikov 1563a845e10SAlexander V. Chernikov if (tc->limit == 0 || tc->count < tc->limit) 1573a845e10SAlexander V. Chernikov return (0); 1583a845e10SAlexander V. Chernikov 1593a845e10SAlexander V. Chernikov if ((tei->flags & TEI_FLAGS_UPDATE) == 0) { 1603a845e10SAlexander V. Chernikov /* Notify userland on error cause */ 1613a845e10SAlexander V. Chernikov tei->flags |= TEI_FLAGS_LIMIT; 1623a845e10SAlexander V. Chernikov return (EFBIG); 1633a845e10SAlexander V. Chernikov } 1643a845e10SAlexander V. Chernikov 1653a845e10SAlexander V. Chernikov /* 1663a845e10SAlexander V. Chernikov * We have UPDATE flag set. 1673a845e10SAlexander V. Chernikov * Permit updating record (if found), 1683a845e10SAlexander V. Chernikov * but restrict adding new one since we've 1693a845e10SAlexander V. Chernikov * already hit the limit. 1703a845e10SAlexander V. Chernikov */ 1713a845e10SAlexander V. Chernikov tei->flags |= TEI_FLAGS_DONTADD; 1723a845e10SAlexander V. Chernikov 1733a845e10SAlexander V. Chernikov return (0); 1743a845e10SAlexander V. Chernikov } 1753a845e10SAlexander V. Chernikov 1763a845e10SAlexander V. Chernikov /* 1771bc0d457SAlexander V. Chernikov * Convert algorithm callback return code into 1781bc0d457SAlexander V. Chernikov * one of pre-defined states known by userland. 1793a845e10SAlexander V. Chernikov */ 1801bc0d457SAlexander V. Chernikov static void 1811bc0d457SAlexander V. Chernikov store_tei_result(struct tentry_info *tei, int do_add, int error, uint32_t num) 1823b3a8eb9SGleb Smirnoff { 1831bc0d457SAlexander V. Chernikov int flag; 1843b3a8eb9SGleb Smirnoff 1851bc0d457SAlexander V. Chernikov flag = 0; 1861bc0d457SAlexander V. Chernikov 1871bc0d457SAlexander V. Chernikov switch (error) { 1881bc0d457SAlexander V. Chernikov case 0: 1891bc0d457SAlexander V. Chernikov if (do_add && num != 0) 1901bc0d457SAlexander V. Chernikov flag = TEI_FLAGS_ADDED; 1911bc0d457SAlexander V. Chernikov if (do_add == 0) 1921bc0d457SAlexander V. Chernikov flag = TEI_FLAGS_DELETED; 1931bc0d457SAlexander V. Chernikov break; 1941bc0d457SAlexander V. Chernikov case ENOENT: 1951bc0d457SAlexander V. Chernikov flag = TEI_FLAGS_NOTFOUND; 1961bc0d457SAlexander V. Chernikov break; 1971bc0d457SAlexander V. Chernikov case EEXIST: 1981bc0d457SAlexander V. Chernikov flag = TEI_FLAGS_EXISTS; 1991bc0d457SAlexander V. Chernikov break; 2001bc0d457SAlexander V. Chernikov default: 2011bc0d457SAlexander V. Chernikov flag = TEI_FLAGS_ERROR; 2021bc0d457SAlexander V. Chernikov } 2031bc0d457SAlexander V. Chernikov 2041bc0d457SAlexander V. Chernikov tei->flags |= flag; 2051bc0d457SAlexander V. Chernikov } 2069f7d47b0SAlexander V. Chernikov 207f99fbf96SAlexander V. Chernikov /* 208f99fbf96SAlexander V. Chernikov * Creates and references table with default parameters. 209f99fbf96SAlexander V. Chernikov * Saves table config, algo and allocated kidx info @ptc, @pta and 210f99fbf96SAlexander V. Chernikov * @pkidx if non-zero. 211f99fbf96SAlexander V. Chernikov * Used for table auto-creation to support old binaries. 212f99fbf96SAlexander V. Chernikov * 213f99fbf96SAlexander V. Chernikov * Returns 0 on success. 214f99fbf96SAlexander V. Chernikov */ 2150468c5baSAlexander V. Chernikov static int 2160468c5baSAlexander V. Chernikov create_table_compat(struct ip_fw_chain *ch, struct tid_info *ti, 2170468c5baSAlexander V. Chernikov struct table_config **ptc, struct table_algo **pta, uint16_t *pkidx) 2180468c5baSAlexander V. Chernikov { 2190468c5baSAlexander V. Chernikov ipfw_xtable_info xi; 2200468c5baSAlexander V. Chernikov int error; 2210468c5baSAlexander V. Chernikov 2220468c5baSAlexander V. Chernikov memset(&xi, 0, sizeof(xi)); 223f99fbf96SAlexander V. Chernikov /* Set u32 as default value type for legacy clients */ 2240468c5baSAlexander V. Chernikov xi.vtype = IPFW_VTYPE_U32; 2250468c5baSAlexander V. Chernikov 2260468c5baSAlexander V. Chernikov error = create_table_internal(ch, ti, NULL, &xi, ptc, pta, pkidx, 1); 2270468c5baSAlexander V. Chernikov if (error != 0) 2280468c5baSAlexander V. Chernikov return (error); 2290468c5baSAlexander V. Chernikov 2300468c5baSAlexander V. Chernikov return (0); 2310468c5baSAlexander V. Chernikov } 2320468c5baSAlexander V. Chernikov 2339f7d47b0SAlexander V. Chernikov /* 2341bc0d457SAlexander V. Chernikov * Find and reference existing table optionally 2351bc0d457SAlexander V. Chernikov * creating new one. 2361bc0d457SAlexander V. Chernikov * 2371bc0d457SAlexander V. Chernikov * Saves found table config/table algo into @ptc / @pta. 2381bc0d457SAlexander V. Chernikov * Returns 0 if table was found/created and referenced 2391bc0d457SAlexander V. Chernikov * or non-zero return code. 2409f7d47b0SAlexander V. Chernikov */ 2411bc0d457SAlexander V. Chernikov static int 2421bc0d457SAlexander V. Chernikov find_ref_table(struct ip_fw_chain *ch, struct tid_info *ti, 2431bc0d457SAlexander V. Chernikov struct tentry_info *tei, uint32_t count, int do_add, 2441bc0d457SAlexander V. Chernikov struct table_config **ptc, struct table_algo **pta) 2451bc0d457SAlexander V. Chernikov { 2461bc0d457SAlexander V. Chernikov struct namedobj_instance *ni; 2471bc0d457SAlexander V. Chernikov struct table_config *tc; 2481bc0d457SAlexander V. Chernikov struct table_algo *ta; 2491bc0d457SAlexander V. Chernikov int error; 2501bc0d457SAlexander V. Chernikov 2511bc0d457SAlexander V. Chernikov IPFW_UH_WLOCK(ch); 2521bc0d457SAlexander V. Chernikov 2531bc0d457SAlexander V. Chernikov ni = CHAIN_TO_NI(ch); 2541bc0d457SAlexander V. Chernikov tc = NULL; 2559f7d47b0SAlexander V. Chernikov ta = NULL; 2569f7d47b0SAlexander V. Chernikov if ((tc = find_table(ni, ti)) != NULL) { 2579f7d47b0SAlexander V. Chernikov /* check table type */ 2589f7d47b0SAlexander V. Chernikov if (tc->no.type != ti->type) { 2599f7d47b0SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 2603b3a8eb9SGleb Smirnoff return (EINVAL); 2613b3a8eb9SGleb Smirnoff } 2623b3a8eb9SGleb Smirnoff 2634f43138aSAlexander V. Chernikov if (tc->locked != 0) { 2644f43138aSAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 2654f43138aSAlexander V. Chernikov return (EACCES); 2664f43138aSAlexander V. Chernikov } 2674f43138aSAlexander V. Chernikov 2684c0c07a5SAlexander V. Chernikov /* Try to exit early on limit hit */ 2691bc0d457SAlexander V. Chernikov if (do_add != 0 && count == 1 && 2701bc0d457SAlexander V. Chernikov check_table_limit(tc, tei) != 0) { 2714c0c07a5SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 2724c0c07a5SAlexander V. Chernikov return (EFBIG); 2734c0c07a5SAlexander V. Chernikov } 2744c0c07a5SAlexander V. Chernikov 2759f7d47b0SAlexander V. Chernikov /* Reference and unlock */ 2769f7d47b0SAlexander V. Chernikov tc->no.refcnt++; 2779f7d47b0SAlexander V. Chernikov ta = tc->ta; 2789f7d47b0SAlexander V. Chernikov } 2799f7d47b0SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 2803b3a8eb9SGleb Smirnoff 281ac35ff17SAlexander V. Chernikov if (tc == NULL) { 2821bc0d457SAlexander V. Chernikov if (do_add == 0) 2831bc0d457SAlexander V. Chernikov return (ESRCH); 2841bc0d457SAlexander V. Chernikov 285db785d31SAlexander V. Chernikov /* Compability mode: create new table for old clients */ 286db785d31SAlexander V. Chernikov if ((tei->flags & TEI_FLAGS_COMPAT) == 0) 287db785d31SAlexander V. Chernikov return (ESRCH); 2883b3a8eb9SGleb Smirnoff 2890468c5baSAlexander V. Chernikov error = create_table_compat(ch, ti, &tc, &ta, NULL); 290db785d31SAlexander V. Chernikov if (error != 0) 291db785d31SAlexander V. Chernikov return (error); 292db785d31SAlexander V. Chernikov 2930468c5baSAlexander V. Chernikov /* OK, now we've got referenced table. */ 294db785d31SAlexander V. Chernikov } 295db785d31SAlexander V. Chernikov 2961bc0d457SAlexander V. Chernikov *ptc = tc; 2971bc0d457SAlexander V. Chernikov *pta = ta; 2981bc0d457SAlexander V. Chernikov return (0); 2991bc0d457SAlexander V. Chernikov } 3001bc0d457SAlexander V. Chernikov 3011bc0d457SAlexander V. Chernikov /* 3021bc0d457SAlexander V. Chernikov * Rolls back already @added to @tc entries using state arrat @ta_buf_m. 3031bc0d457SAlexander V. Chernikov * Assume the following layout: 3041bc0d457SAlexander V. Chernikov * 1) ADD state (ta_buf_m[0] ... t_buf_m[added - 1]) for handling update cases 3051bc0d457SAlexander V. Chernikov * 2) DEL state (ta_buf_m[count[ ... t_buf_m[count + added - 1]) 3061bc0d457SAlexander V. Chernikov * for storing deleted state 3071bc0d457SAlexander V. Chernikov */ 3081bc0d457SAlexander V. Chernikov static void 3091bc0d457SAlexander V. Chernikov rollback_added_entries(struct ip_fw_chain *ch, struct table_config *tc, 3101bc0d457SAlexander V. Chernikov struct table_info *tinfo, struct tentry_info *tei, caddr_t ta_buf_m, 3111bc0d457SAlexander V. Chernikov uint32_t count, uint32_t added) 3121bc0d457SAlexander V. Chernikov { 3131bc0d457SAlexander V. Chernikov struct table_algo *ta; 3141bc0d457SAlexander V. Chernikov struct tentry_info *ptei; 3151bc0d457SAlexander V. Chernikov caddr_t v, vv; 3161bc0d457SAlexander V. Chernikov size_t ta_buf_sz; 3171bc0d457SAlexander V. Chernikov int error, i; 3181bc0d457SAlexander V. Chernikov uint32_t num; 3191bc0d457SAlexander V. Chernikov 3201bc0d457SAlexander V. Chernikov IPFW_UH_WLOCK_ASSERT(ch); 3211bc0d457SAlexander V. Chernikov 3221bc0d457SAlexander V. Chernikov ta = tc->ta; 3233a845e10SAlexander V. Chernikov ta_buf_sz = ta->ta_buf_size; 3241bc0d457SAlexander V. Chernikov v = ta_buf_m; 3251bc0d457SAlexander V. Chernikov vv = v + count * ta_buf_sz; 3261bc0d457SAlexander V. Chernikov for (i = 0; i < added; i++, v += ta_buf_sz, vv += ta_buf_sz) { 3271bc0d457SAlexander V. Chernikov ptei = &tei[i]; 3281bc0d457SAlexander V. Chernikov if ((ptei->flags & TEI_FLAGS_UPDATED) != 0) { 3291bc0d457SAlexander V. Chernikov 3301bc0d457SAlexander V. Chernikov /* 3311bc0d457SAlexander V. Chernikov * We have old value stored by previous 3321bc0d457SAlexander V. Chernikov * call in @ptei->value. Do add once again 3331bc0d457SAlexander V. Chernikov * to restore it. 3341bc0d457SAlexander V. Chernikov */ 3351bc0d457SAlexander V. Chernikov error = ta->add(tc->astate, tinfo, ptei, v, &num); 3361bc0d457SAlexander V. Chernikov KASSERT(error == 0, ("rollback UPDATE fail")); 3371bc0d457SAlexander V. Chernikov KASSERT(num == 0, ("rollback UPDATE fail2")); 3381bc0d457SAlexander V. Chernikov continue; 3391bc0d457SAlexander V. Chernikov } 3401bc0d457SAlexander V. Chernikov 3411bc0d457SAlexander V. Chernikov error = ta->prepare_del(ch, ptei, vv); 3421bc0d457SAlexander V. Chernikov KASSERT(error == 0, ("pre-rollback INSERT failed")); 3431bc0d457SAlexander V. Chernikov error = ta->del(tc->astate, tinfo, ptei, vv, &num); 3441bc0d457SAlexander V. Chernikov KASSERT(error == 0, ("rollback INSERT failed")); 3451bc0d457SAlexander V. Chernikov tc->count -= num; 3461bc0d457SAlexander V. Chernikov } 3471bc0d457SAlexander V. Chernikov } 3481bc0d457SAlexander V. Chernikov 3491bc0d457SAlexander V. Chernikov /* 3501bc0d457SAlexander V. Chernikov * Prepares add/del state for all @count entries in @tei. 3511bc0d457SAlexander V. Chernikov * Uses either stack buffer (@ta_buf) or allocates a new one. 3521bc0d457SAlexander V. Chernikov * Stores pointer to allocated buffer back to @ta_buf. 3531bc0d457SAlexander V. Chernikov * 3541bc0d457SAlexander V. Chernikov * Returns 0 on success. 3551bc0d457SAlexander V. Chernikov */ 3561bc0d457SAlexander V. Chernikov static int 3571bc0d457SAlexander V. Chernikov prepare_batch_buffer(struct ip_fw_chain *ch, struct table_algo *ta, 3581bc0d457SAlexander V. Chernikov struct tentry_info *tei, uint32_t count, int do_add, caddr_t *ta_buf) 3591bc0d457SAlexander V. Chernikov { 3601bc0d457SAlexander V. Chernikov caddr_t ta_buf_m, v; 3611bc0d457SAlexander V. Chernikov size_t ta_buf_sz, sz; 3621bc0d457SAlexander V. Chernikov struct tentry_info *ptei; 3631bc0d457SAlexander V. Chernikov int error, i; 3641bc0d457SAlexander V. Chernikov 3651bc0d457SAlexander V. Chernikov error = 0; 3661bc0d457SAlexander V. Chernikov ta_buf_sz = ta->ta_buf_size; 3673a845e10SAlexander V. Chernikov if (count == 1) { 3681bc0d457SAlexander V. Chernikov /* Sigle add/delete, use on-stack buffer */ 3691bc0d457SAlexander V. Chernikov memset(*ta_buf, 0, TA_BUF_SZ); 3701bc0d457SAlexander V. Chernikov ta_buf_m = *ta_buf; 3713a845e10SAlexander V. Chernikov } else { 3723a845e10SAlexander V. Chernikov 3733a845e10SAlexander V. Chernikov /* 3741bc0d457SAlexander V. Chernikov * Multiple adds/deletes, allocate larger buffer 3751bc0d457SAlexander V. Chernikov * 3761bc0d457SAlexander V. Chernikov * Note we need 2xcount buffer for add case: 3771bc0d457SAlexander V. Chernikov * we have hold both ADD state 3783a845e10SAlexander V. Chernikov * and DELETE state (this may be needed 3793a845e10SAlexander V. Chernikov * if we need to rollback all changes) 3803a845e10SAlexander V. Chernikov */ 3811bc0d457SAlexander V. Chernikov sz = count * ta_buf_sz; 3821bc0d457SAlexander V. Chernikov ta_buf_m = malloc((do_add != 0) ? sz * 2 : sz, M_TEMP, 3833a845e10SAlexander V. Chernikov M_WAITOK | M_ZERO); 3843a845e10SAlexander V. Chernikov } 3851bc0d457SAlexander V. Chernikov 3863a845e10SAlexander V. Chernikov v = ta_buf_m; 3873a845e10SAlexander V. Chernikov for (i = 0; i < count; i++, v += ta_buf_sz) { 3881bc0d457SAlexander V. Chernikov ptei = &tei[i]; 3891bc0d457SAlexander V. Chernikov error = (do_add != 0) ? 3901bc0d457SAlexander V. Chernikov ta->prepare_add(ch, ptei, v) : ta->prepare_del(ch, ptei, v); 3913a845e10SAlexander V. Chernikov 3923a845e10SAlexander V. Chernikov /* 3933a845e10SAlexander V. Chernikov * Some syntax error (incorrect mask, or address, or 3943a845e10SAlexander V. Chernikov * anything). Return error regardless of atomicity 3953a845e10SAlexander V. Chernikov * settings. 3963a845e10SAlexander V. Chernikov */ 397db785d31SAlexander V. Chernikov if (error != 0) 3981bc0d457SAlexander V. Chernikov break; 3993a845e10SAlexander V. Chernikov } 4003b3a8eb9SGleb Smirnoff 4011bc0d457SAlexander V. Chernikov *ta_buf = ta_buf_m; 4021bc0d457SAlexander V. Chernikov return (error); 4031bc0d457SAlexander V. Chernikov } 4041bc0d457SAlexander V. Chernikov 4051bc0d457SAlexander V. Chernikov /* 4061bc0d457SAlexander V. Chernikov * Flushes allocated state for each @count entries in @tei. 4071bc0d457SAlexander V. Chernikov * Frees @ta_buf_m if differs from stack buffer @ta_buf. 4081bc0d457SAlexander V. Chernikov */ 4091bc0d457SAlexander V. Chernikov static void 4101bc0d457SAlexander V. Chernikov flush_batch_buffer(struct ip_fw_chain *ch, struct table_algo *ta, 4111bc0d457SAlexander V. Chernikov struct tentry_info *tei, uint32_t count, int do_add, int rollback, 4121bc0d457SAlexander V. Chernikov caddr_t ta_buf_m, caddr_t ta_buf) 4131bc0d457SAlexander V. Chernikov { 4141bc0d457SAlexander V. Chernikov caddr_t v; 4151bc0d457SAlexander V. Chernikov size_t ta_buf_sz; 4161bc0d457SAlexander V. Chernikov int i; 4171bc0d457SAlexander V. Chernikov 4181bc0d457SAlexander V. Chernikov ta_buf_sz = ta->ta_buf_size; 4191bc0d457SAlexander V. Chernikov 4201bc0d457SAlexander V. Chernikov /* Run cleaning callback anyway */ 4211bc0d457SAlexander V. Chernikov v = ta_buf_m; 4221bc0d457SAlexander V. Chernikov for (i = 0; i < count; i++, v += ta_buf_sz) 4231bc0d457SAlexander V. Chernikov ta->flush_entry(ch, &tei[i], v); 4241bc0d457SAlexander V. Chernikov 4251bc0d457SAlexander V. Chernikov /* Clean up "deleted" state in case of rollback */ 4261bc0d457SAlexander V. Chernikov if (rollback != 0) { 4271bc0d457SAlexander V. Chernikov v = ta_buf_m + count * ta_buf_sz; 4281bc0d457SAlexander V. Chernikov for (i = 0; i < count; i++, v += ta_buf_sz) 4291bc0d457SAlexander V. Chernikov ta->flush_entry(ch, &tei[i], v); 4301bc0d457SAlexander V. Chernikov } 4311bc0d457SAlexander V. Chernikov 4321bc0d457SAlexander V. Chernikov if (ta_buf_m != ta_buf) 4331bc0d457SAlexander V. Chernikov free(ta_buf_m, M_TEMP); 4341bc0d457SAlexander V. Chernikov } 4351bc0d457SAlexander V. Chernikov 4361bc0d457SAlexander V. Chernikov /* 4371bc0d457SAlexander V. Chernikov * Adds/updates one or more entries in table @ti. 4380468c5baSAlexander V. Chernikov * Function references @ti first to ensure table won't 4390468c5baSAlexander V. Chernikov * disappear or change its type. 4400468c5baSAlexander V. Chernikov * After that, prepare_add callback is called for each @tei entry. 4410468c5baSAlexander V. Chernikov * Next, we try to add each entry under UH+WHLOCK 4420468c5baSAlexander V. Chernikov * using add() callback. 4430468c5baSAlexander V. Chernikov * Finally, we free all state by calling flush_entry callback 4440468c5baSAlexander V. Chernikov * for each @tei. 4451bc0d457SAlexander V. Chernikov * 4461bc0d457SAlexander V. Chernikov * Returns 0 on success. 4471bc0d457SAlexander V. Chernikov */ 4481bc0d457SAlexander V. Chernikov int 4491bc0d457SAlexander V. Chernikov add_table_entry(struct ip_fw_chain *ch, struct tid_info *ti, 4501bc0d457SAlexander V. Chernikov struct tentry_info *tei, uint8_t flags, uint32_t count) 4511bc0d457SAlexander V. Chernikov { 4521bc0d457SAlexander V. Chernikov struct table_config *tc; 4531bc0d457SAlexander V. Chernikov struct table_algo *ta; 4541bc0d457SAlexander V. Chernikov uint16_t kidx; 4551bc0d457SAlexander V. Chernikov int error, first_error, i, rollback; 4561bc0d457SAlexander V. Chernikov uint32_t num, numadd; 4571bc0d457SAlexander V. Chernikov struct tentry_info *ptei; 4581bc0d457SAlexander V. Chernikov char ta_buf[TA_BUF_SZ]; 4591bc0d457SAlexander V. Chernikov caddr_t ta_buf_m, v; 4601bc0d457SAlexander V. Chernikov 4611bc0d457SAlexander V. Chernikov /* 4621bc0d457SAlexander V. Chernikov * Find and reference existing table. 4631bc0d457SAlexander V. Chernikov */ 4641bc0d457SAlexander V. Chernikov if ((error = find_ref_table(ch, ti, tei, count, 1, &tc, &ta)) != 0) 4651bc0d457SAlexander V. Chernikov return (error); 4661bc0d457SAlexander V. Chernikov 4671bc0d457SAlexander V. Chernikov /* Allocate memory and prepare record(s) */ 4681bc0d457SAlexander V. Chernikov rollback = 0; 4691bc0d457SAlexander V. Chernikov /* Pass stack buffer by default */ 4701bc0d457SAlexander V. Chernikov ta_buf_m = ta_buf; 4711bc0d457SAlexander V. Chernikov error = prepare_batch_buffer(ch, ta, tei, count, 1, &ta_buf_m); 4721bc0d457SAlexander V. Chernikov if (error != 0) 4731bc0d457SAlexander V. Chernikov goto cleanup; 4741bc0d457SAlexander V. Chernikov 475b074b7bbSAlexander V. Chernikov IPFW_UH_WLOCK(ch); 4763b3a8eb9SGleb Smirnoff 477c8d5d308SAlexander V. Chernikov /* Drop reference we've used in first search */ 478c8d5d308SAlexander V. Chernikov tc->no.refcnt--; 479c8d5d308SAlexander V. Chernikov 480b6ee846eSAlexander V. Chernikov /* 481b6ee846eSAlexander V. Chernikov * Ensure we are able to add all entries without additional 482b6ee846eSAlexander V. Chernikov * memory allocations. May release/reacquire UH_WLOCK. 483c8d5d308SAlexander V. Chernikov * check_table_space() guarantees us @tc won't disappear 484c8d5d308SAlexander V. Chernikov * by referencing it internally. 485b6ee846eSAlexander V. Chernikov */ 486b6ee846eSAlexander V. Chernikov kidx = tc->no.kidx; 487b6ee846eSAlexander V. Chernikov error = check_table_space(ch, tc, KIDX_TO_TI(ch, kidx), count); 488b6ee846eSAlexander V. Chernikov if (error != 0) { 489b6ee846eSAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 4903a845e10SAlexander V. Chernikov goto cleanup; 491b6ee846eSAlexander V. Chernikov } 492b6ee846eSAlexander V. Chernikov 493c8d5d308SAlexander V. Chernikov /* 494c8d5d308SAlexander V. Chernikov * Check if table algo is still the same. 495c8d5d308SAlexander V. Chernikov * (changed ta may be the result of table swap). 496c8d5d308SAlexander V. Chernikov */ 497c8d5d308SAlexander V. Chernikov if (ta != tc->ta) { 498c8d5d308SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 499c8d5d308SAlexander V. Chernikov error = EINVAL; 500c8d5d308SAlexander V. Chernikov goto cleanup; 501c8d5d308SAlexander V. Chernikov } 502c8d5d308SAlexander V. Chernikov 5033a845e10SAlexander V. Chernikov /* We've got valid table in @tc. Let's try to add data */ 5049f7d47b0SAlexander V. Chernikov kidx = tc->no.kidx; 5059f7d47b0SAlexander V. Chernikov ta = tc->ta; 5063a845e10SAlexander V. Chernikov numadd = 0; 5073a845e10SAlexander V. Chernikov first_error = 0; 5089f7d47b0SAlexander V. Chernikov 509b074b7bbSAlexander V. Chernikov IPFW_WLOCK(ch); 5103a845e10SAlexander V. Chernikov 5113a845e10SAlexander V. Chernikov v = ta_buf_m; 5121bc0d457SAlexander V. Chernikov for (i = 0; i < count; i++, v += ta->ta_buf_size) { 5133a845e10SAlexander V. Chernikov ptei = &tei[i]; 5143a845e10SAlexander V. Chernikov num = 0; 5153a845e10SAlexander V. Chernikov /* check limit before adding */ 5163a845e10SAlexander V. Chernikov if ((error = check_table_limit(tc, ptei)) == 0) { 5173a845e10SAlexander V. Chernikov error = ta->add(tc->astate, KIDX_TO_TI(ch, kidx), 5183a845e10SAlexander V. Chernikov ptei, v, &num); 5193a845e10SAlexander V. Chernikov /* Set status flag to inform userland */ 5201bc0d457SAlexander V. Chernikov store_tei_result(ptei, 1, error, num); 5213a845e10SAlexander V. Chernikov } 5223a845e10SAlexander V. Chernikov if (error == 0) { 5233a845e10SAlexander V. Chernikov /* Update number of records to ease limit checking */ 5243a845e10SAlexander V. Chernikov tc->count += num; 5253a845e10SAlexander V. Chernikov numadd += num; 5263a845e10SAlexander V. Chernikov continue; 5273a845e10SAlexander V. Chernikov } 5283a845e10SAlexander V. Chernikov 5293a845e10SAlexander V. Chernikov if (first_error == 0) 5303a845e10SAlexander V. Chernikov first_error = error; 5313a845e10SAlexander V. Chernikov 5323a845e10SAlexander V. Chernikov /* 5333a845e10SAlexander V. Chernikov * Some error have happened. Check our atomicity 5343a845e10SAlexander V. Chernikov * settings: continue if atomicity is not required, 5353a845e10SAlexander V. Chernikov * rollback changes otherwise. 5363a845e10SAlexander V. Chernikov */ 5373a845e10SAlexander V. Chernikov if ((flags & IPFW_CTF_ATOMIC) == 0) 5383a845e10SAlexander V. Chernikov continue; 5393a845e10SAlexander V. Chernikov 5401bc0d457SAlexander V. Chernikov rollback_added_entries(ch, tc, KIDX_TO_TI(ch, kidx), 5411bc0d457SAlexander V. Chernikov tei, ta_buf_m, count, i); 5423a845e10SAlexander V. Chernikov break; 5433a845e10SAlexander V. Chernikov } 5443a845e10SAlexander V. Chernikov 5453b3a8eb9SGleb Smirnoff IPFW_WUNLOCK(ch); 5469f7d47b0SAlexander V. Chernikov 547b6ee846eSAlexander V. Chernikov /* Permit post-add algorithm grow/rehash. */ 5483a845e10SAlexander V. Chernikov if (numadd != 0) 5493a845e10SAlexander V. Chernikov check_table_space(ch, tc, KIDX_TO_TI(ch, kidx), 0); 550db785d31SAlexander V. Chernikov 551b074b7bbSAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 552b074b7bbSAlexander V. Chernikov 5533a845e10SAlexander V. Chernikov /* Return first error to user, if any */ 5543a845e10SAlexander V. Chernikov error = first_error; 5553a845e10SAlexander V. Chernikov 5563a845e10SAlexander V. Chernikov cleanup: 5571bc0d457SAlexander V. Chernikov flush_batch_buffer(ch, ta, tei, count, 1, rollback, ta_buf_m, ta_buf); 558b074b7bbSAlexander V. Chernikov 5599f7d47b0SAlexander V. Chernikov return (error); 5603b3a8eb9SGleb Smirnoff } 5613b3a8eb9SGleb Smirnoff 5623a845e10SAlexander V. Chernikov /* 5633a845e10SAlexander V. Chernikov * Deletes one or more entries in table @ti. 5643a845e10SAlexander V. Chernikov * 5653a845e10SAlexander V. Chernikov * Returns 0 on success. 5663a845e10SAlexander V. Chernikov */ 5673b3a8eb9SGleb Smirnoff int 5681832a7b3SAlexander V. Chernikov del_table_entry(struct ip_fw_chain *ch, struct tid_info *ti, 5693a845e10SAlexander V. Chernikov struct tentry_info *tei, uint8_t flags, uint32_t count) 5703b3a8eb9SGleb Smirnoff { 571b074b7bbSAlexander V. Chernikov struct table_config *tc; 5729f7d47b0SAlexander V. Chernikov struct table_algo *ta; 5733a845e10SAlexander V. Chernikov struct tentry_info *ptei; 574b074b7bbSAlexander V. Chernikov uint16_t kidx; 5753a845e10SAlexander V. Chernikov int error, first_error, i; 5763a845e10SAlexander V. Chernikov uint32_t num, numdel; 577b6ee846eSAlexander V. Chernikov char ta_buf[TA_BUF_SZ]; 5783a845e10SAlexander V. Chernikov caddr_t ta_buf_m, v; 5793b3a8eb9SGleb Smirnoff 580db785d31SAlexander V. Chernikov /* 5811bc0d457SAlexander V. Chernikov * Find and reference existing table. 582db785d31SAlexander V. Chernikov */ 5831bc0d457SAlexander V. Chernikov if ((error = find_ref_table(ch, ti, tei, count, 0, &tc, &ta)) != 0) 584db785d31SAlexander V. Chernikov return (error); 5853a845e10SAlexander V. Chernikov 58635e1bbd0SAlexander V. Chernikov /* Allocate memory and prepare record(s) */ 5871bc0d457SAlexander V. Chernikov /* Pass stack buffer by default */ 5883a845e10SAlexander V. Chernikov ta_buf_m = ta_buf; 5891bc0d457SAlexander V. Chernikov error = prepare_batch_buffer(ch, ta, tei, count, 0, &ta_buf_m); 5903a845e10SAlexander V. Chernikov if (error != 0) 5913a845e10SAlexander V. Chernikov goto cleanup; 5929f7d47b0SAlexander V. Chernikov 5933a845e10SAlexander V. Chernikov IPFW_UH_WLOCK(ch); 5943a845e10SAlexander V. Chernikov 5953a845e10SAlexander V. Chernikov /* Drop reference we've used in first search */ 5963a845e10SAlexander V. Chernikov tc->no.refcnt--; 5973a845e10SAlexander V. Chernikov 598c8d5d308SAlexander V. Chernikov /* 599c8d5d308SAlexander V. Chernikov * Check if table algo is still the same. 600c8d5d308SAlexander V. Chernikov * (changed ta may be the result of table swap). 601c8d5d308SAlexander V. Chernikov */ 602c8d5d308SAlexander V. Chernikov if (ta != tc->ta) { 603c8d5d308SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 604c8d5d308SAlexander V. Chernikov error = EINVAL; 605c8d5d308SAlexander V. Chernikov goto cleanup; 606c8d5d308SAlexander V. Chernikov } 607c8d5d308SAlexander V. Chernikov 608b074b7bbSAlexander V. Chernikov kidx = tc->no.kidx; 6093a845e10SAlexander V. Chernikov numdel = 0; 6103a845e10SAlexander V. Chernikov first_error = 0; 611b074b7bbSAlexander V. Chernikov 612b074b7bbSAlexander V. Chernikov IPFW_WLOCK(ch); 6133a845e10SAlexander V. Chernikov v = ta_buf_m; 6141bc0d457SAlexander V. Chernikov for (i = 0; i < count; i++, v += ta->ta_buf_size) { 6153a845e10SAlexander V. Chernikov ptei = &tei[i]; 6163a845e10SAlexander V. Chernikov num = 0; 6173a845e10SAlexander V. Chernikov error = ta->del(tc->astate, KIDX_TO_TI(ch, kidx), ptei, v, 6183a845e10SAlexander V. Chernikov &num); 6193a845e10SAlexander V. Chernikov /* Save state for userland */ 6201bc0d457SAlexander V. Chernikov store_tei_result(ptei, 0, error, num); 6213a845e10SAlexander V. Chernikov if (error != 0 && first_error == 0) 6223a845e10SAlexander V. Chernikov first_error = error; 6233a845e10SAlexander V. Chernikov tc->count -= num; 6243a845e10SAlexander V. Chernikov numdel += num; 6253a845e10SAlexander V. Chernikov } 6263b3a8eb9SGleb Smirnoff IPFW_WUNLOCK(ch); 6273b3a8eb9SGleb Smirnoff 6283a845e10SAlexander V. Chernikov if (numdel != 0) { 629b6ee846eSAlexander V. Chernikov /* Run post-del hook to permit shrinking */ 630b6ee846eSAlexander V. Chernikov error = check_table_space(ch, tc, KIDX_TO_TI(ch, kidx), 0); 631b6ee846eSAlexander V. Chernikov } 632b074b7bbSAlexander V. Chernikov 6339f7d47b0SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 6343b3a8eb9SGleb Smirnoff 6353a845e10SAlexander V. Chernikov /* Return first error to user, if any */ 6363a845e10SAlexander V. Chernikov error = first_error; 6373a845e10SAlexander V. Chernikov 6383a845e10SAlexander V. Chernikov cleanup: 6391bc0d457SAlexander V. Chernikov flush_batch_buffer(ch, ta, tei, count, 0, 0, ta_buf_m, ta_buf); 640ac35ff17SAlexander V. Chernikov 641ac35ff17SAlexander V. Chernikov return (error); 642ac35ff17SAlexander V. Chernikov } 643ac35ff17SAlexander V. Chernikov 644db785d31SAlexander V. Chernikov /* 645b6ee846eSAlexander V. Chernikov * Ensure that table @tc has enough space to add @count entries without 646b6ee846eSAlexander V. Chernikov * need for reallocation. 647db785d31SAlexander V. Chernikov * 648db785d31SAlexander V. Chernikov * Callbacks order: 649301290bcSAlexander V. Chernikov * 0) need_modify() (UH_WLOCK) - checks if @count items can be added w/o resize. 650b6ee846eSAlexander V. Chernikov * 651db785d31SAlexander V. Chernikov * 1) alloc_modify (no locks, M_WAITOK) - alloc new state based on @pflags. 652db785d31SAlexander V. Chernikov * 2) prepare_modifyt (UH_WLOCK) - copy old data into new storage 653db785d31SAlexander V. Chernikov * 3) modify (UH_WLOCK + WLOCK) - switch pointers 654b6ee846eSAlexander V. Chernikov * 4) flush_modify (UH_WLOCK) - free state, if needed 655b6ee846eSAlexander V. Chernikov * 656b6ee846eSAlexander V. Chernikov * Returns 0 on success. 657db785d31SAlexander V. Chernikov */ 658db785d31SAlexander V. Chernikov static int 659b6ee846eSAlexander V. Chernikov check_table_space(struct ip_fw_chain *ch, struct table_config *tc, 660b6ee846eSAlexander V. Chernikov struct table_info *ti, uint32_t count) 661db785d31SAlexander V. Chernikov { 662b6ee846eSAlexander V. Chernikov struct table_algo *ta; 663b6ee846eSAlexander V. Chernikov uint64_t pflags; 664b6ee846eSAlexander V. Chernikov char ta_buf[TA_BUF_SZ]; 665db785d31SAlexander V. Chernikov int error; 666db785d31SAlexander V. Chernikov 667b6ee846eSAlexander V. Chernikov IPFW_UH_WLOCK_ASSERT(ch); 668db785d31SAlexander V. Chernikov 669b6ee846eSAlexander V. Chernikov error = 0; 670b6ee846eSAlexander V. Chernikov ta = tc->ta; 671b6ee846eSAlexander V. Chernikov /* Acquire reference not to loose @tc between locks/unlocks */ 672b6ee846eSAlexander V. Chernikov tc->no.refcnt++; 673db785d31SAlexander V. Chernikov 674db785d31SAlexander V. Chernikov /* 675b6ee846eSAlexander V. Chernikov * TODO: think about avoiding race between large add/large delete 676b6ee846eSAlexander V. Chernikov * operation on algorithm which implements shrinking along with 677b6ee846eSAlexander V. Chernikov * growing. 678db785d31SAlexander V. Chernikov */ 679b6ee846eSAlexander V. Chernikov while (true) { 680b6ee846eSAlexander V. Chernikov pflags = 0; 681301290bcSAlexander V. Chernikov if (ta->need_modify(tc->astate, ti, count, &pflags) == 0) { 68235e1bbd0SAlexander V. Chernikov error = 0; 68335e1bbd0SAlexander V. Chernikov break; 684b6ee846eSAlexander V. Chernikov } 685db785d31SAlexander V. Chernikov 686b6ee846eSAlexander V. Chernikov /* We have to shrink/grow table */ 687b6ee846eSAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 688b6ee846eSAlexander V. Chernikov 689301290bcSAlexander V. Chernikov memset(&ta_buf, 0, sizeof(ta_buf)); 690b6ee846eSAlexander V. Chernikov if ((error = ta->prepare_mod(ta_buf, &pflags)) != 0) { 691b6ee846eSAlexander V. Chernikov IPFW_UH_WLOCK(ch); 692b6ee846eSAlexander V. Chernikov break; 693b6ee846eSAlexander V. Chernikov } 694b6ee846eSAlexander V. Chernikov 695b6ee846eSAlexander V. Chernikov IPFW_UH_WLOCK(ch); 696b6ee846eSAlexander V. Chernikov 697b6ee846eSAlexander V. Chernikov /* Check if we still need to alter table */ 698b6ee846eSAlexander V. Chernikov ti = KIDX_TO_TI(ch, tc->no.kidx); 699301290bcSAlexander V. Chernikov if (ta->need_modify(tc->astate, ti, count, &pflags) == 0) { 700301290bcSAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 701b6ee846eSAlexander V. Chernikov 702b6ee846eSAlexander V. Chernikov /* 70335e1bbd0SAlexander V. Chernikov * Other thread has already performed resize. 70435e1bbd0SAlexander V. Chernikov * Flush our state and return. 705b6ee846eSAlexander V. Chernikov */ 706b6ee846eSAlexander V. Chernikov ta->flush_mod(ta_buf); 707b6ee846eSAlexander V. Chernikov break; 708b6ee846eSAlexander V. Chernikov } 709b6ee846eSAlexander V. Chernikov 710b6ee846eSAlexander V. Chernikov error = ta->fill_mod(tc->astate, ti, ta_buf, &pflags); 711b6ee846eSAlexander V. Chernikov if (error == 0) { 712db785d31SAlexander V. Chernikov /* Do actual modification */ 713db785d31SAlexander V. Chernikov IPFW_WLOCK(ch); 71468394ec8SAlexander V. Chernikov ta->modify(tc->astate, ti, ta_buf, pflags); 715db785d31SAlexander V. Chernikov IPFW_WUNLOCK(ch); 716db785d31SAlexander V. Chernikov } 717db785d31SAlexander V. Chernikov 718b6ee846eSAlexander V. Chernikov /* Anyway, flush data and retry */ 719db785d31SAlexander V. Chernikov ta->flush_mod(ta_buf); 720b6ee846eSAlexander V. Chernikov } 721db785d31SAlexander V. Chernikov 722b6ee846eSAlexander V. Chernikov tc->no.refcnt--; 723db785d31SAlexander V. Chernikov return (error); 724db785d31SAlexander V. Chernikov } 725db785d31SAlexander V. Chernikov 7263a845e10SAlexander V. Chernikov /* 7273a845e10SAlexander V. Chernikov * Selects appropriate table operation handler 7283a845e10SAlexander V. Chernikov * depending on opcode version. 7293a845e10SAlexander V. Chernikov */ 730ac35ff17SAlexander V. Chernikov int 731db785d31SAlexander V. Chernikov ipfw_manage_table_ent(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 732ac35ff17SAlexander V. Chernikov struct sockopt_data *sd) 733ac35ff17SAlexander V. Chernikov { 734ac35ff17SAlexander V. Chernikov int error; 735ac35ff17SAlexander V. Chernikov 736ac35ff17SAlexander V. Chernikov switch (op3->version) { 737ac35ff17SAlexander V. Chernikov case 0: 738db785d31SAlexander V. Chernikov error = ipfw_manage_table_ent_v0(ch, op3, sd); 739ac35ff17SAlexander V. Chernikov break; 740ac35ff17SAlexander V. Chernikov case 1: 741db785d31SAlexander V. Chernikov error = ipfw_manage_table_ent_v1(ch, op3, sd); 742ac35ff17SAlexander V. Chernikov break; 743ac35ff17SAlexander V. Chernikov default: 744ac35ff17SAlexander V. Chernikov error = ENOTSUP; 745ac35ff17SAlexander V. Chernikov } 746ac35ff17SAlexander V. Chernikov 747ac35ff17SAlexander V. Chernikov return (error); 748ac35ff17SAlexander V. Chernikov } 749ac35ff17SAlexander V. Chernikov 750ac35ff17SAlexander V. Chernikov /* 751ac35ff17SAlexander V. Chernikov * Adds or deletes record in table. 752ac35ff17SAlexander V. Chernikov * Data layout (v0): 753ac35ff17SAlexander V. Chernikov * Request: [ ip_fw3_opheader ipfw_table_xentry ] 754ac35ff17SAlexander V. Chernikov * 755ac35ff17SAlexander V. Chernikov * Returns 0 on success 756ac35ff17SAlexander V. Chernikov */ 757ac35ff17SAlexander V. Chernikov static int 758db785d31SAlexander V. Chernikov ipfw_manage_table_ent_v0(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 759ac35ff17SAlexander V. Chernikov struct sockopt_data *sd) 760ac35ff17SAlexander V. Chernikov { 761ac35ff17SAlexander V. Chernikov ipfw_table_xentry *xent; 762ac35ff17SAlexander V. Chernikov struct tentry_info tei; 763ac35ff17SAlexander V. Chernikov struct tid_info ti; 764ac35ff17SAlexander V. Chernikov int error, hdrlen, read; 765ac35ff17SAlexander V. Chernikov 766ac35ff17SAlexander V. Chernikov hdrlen = offsetof(ipfw_table_xentry, k); 767ac35ff17SAlexander V. Chernikov 768ac35ff17SAlexander V. Chernikov /* Check minimum header size */ 769ac35ff17SAlexander V. Chernikov if (sd->valsize < (sizeof(*op3) + hdrlen)) 770ac35ff17SAlexander V. Chernikov return (EINVAL); 771ac35ff17SAlexander V. Chernikov 772ac35ff17SAlexander V. Chernikov read = sizeof(ip_fw3_opheader); 773ac35ff17SAlexander V. Chernikov 774ac35ff17SAlexander V. Chernikov /* Check if xentry len field is valid */ 775ac35ff17SAlexander V. Chernikov xent = (ipfw_table_xentry *)(op3 + 1); 776ac35ff17SAlexander V. Chernikov if (xent->len < hdrlen || xent->len + read > sd->valsize) 777ac35ff17SAlexander V. Chernikov return (EINVAL); 778ac35ff17SAlexander V. Chernikov 779ac35ff17SAlexander V. Chernikov memset(&tei, 0, sizeof(tei)); 780ac35ff17SAlexander V. Chernikov tei.paddr = &xent->k; 781ac35ff17SAlexander V. Chernikov tei.masklen = xent->masklen; 782ac35ff17SAlexander V. Chernikov tei.value = xent->value; 783ac35ff17SAlexander V. Chernikov /* Old requests compability */ 784db785d31SAlexander V. Chernikov tei.flags = TEI_FLAGS_COMPAT; 785ac35ff17SAlexander V. Chernikov if (xent->type == IPFW_TABLE_CIDR) { 786ac35ff17SAlexander V. Chernikov if (xent->len - hdrlen == sizeof(in_addr_t)) 787ac35ff17SAlexander V. Chernikov tei.subtype = AF_INET; 788ac35ff17SAlexander V. Chernikov else 789ac35ff17SAlexander V. Chernikov tei.subtype = AF_INET6; 790ac35ff17SAlexander V. Chernikov } 791ac35ff17SAlexander V. Chernikov 792ac35ff17SAlexander V. Chernikov memset(&ti, 0, sizeof(ti)); 793ac35ff17SAlexander V. Chernikov ti.uidx = xent->tbl; 794ac35ff17SAlexander V. Chernikov ti.type = xent->type; 795ac35ff17SAlexander V. Chernikov 796ac35ff17SAlexander V. Chernikov error = (op3->opcode == IP_FW_TABLE_XADD) ? 7973a845e10SAlexander V. Chernikov add_table_entry(ch, &ti, &tei, 0, 1) : 7983a845e10SAlexander V. Chernikov del_table_entry(ch, &ti, &tei, 0, 1); 799ac35ff17SAlexander V. Chernikov 800ac35ff17SAlexander V. Chernikov return (error); 801ac35ff17SAlexander V. Chernikov } 802ac35ff17SAlexander V. Chernikov 803ac35ff17SAlexander V. Chernikov /* 804ac35ff17SAlexander V. Chernikov * Adds or deletes record in table. 805ac35ff17SAlexander V. Chernikov * Data layout (v1)(current): 806db785d31SAlexander V. Chernikov * Request: [ ipfw_obj_header 807db785d31SAlexander V. Chernikov * ipfw_obj_ctlv(IPFW_TLV_TBLENT_LIST) [ ipfw_obj_tentry x N ] 808db785d31SAlexander V. Chernikov * ] 809ac35ff17SAlexander V. Chernikov * 810ac35ff17SAlexander V. Chernikov * Returns 0 on success 811ac35ff17SAlexander V. Chernikov */ 812ac35ff17SAlexander V. Chernikov static int 813db785d31SAlexander V. Chernikov ipfw_manage_table_ent_v1(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 814ac35ff17SAlexander V. Chernikov struct sockopt_data *sd) 815ac35ff17SAlexander V. Chernikov { 8163a845e10SAlexander V. Chernikov ipfw_obj_tentry *tent, *ptent; 817db785d31SAlexander V. Chernikov ipfw_obj_ctlv *ctlv; 818ac35ff17SAlexander V. Chernikov ipfw_obj_header *oh; 8193a845e10SAlexander V. Chernikov struct tentry_info *ptei, tei, *tei_buf; 820ac35ff17SAlexander V. Chernikov struct tid_info ti; 8213a845e10SAlexander V. Chernikov int error, i, kidx, read; 822ac35ff17SAlexander V. Chernikov 823ac35ff17SAlexander V. Chernikov /* Check minimum header size */ 824db785d31SAlexander V. Chernikov if (sd->valsize < (sizeof(*oh) + sizeof(*ctlv))) 825ac35ff17SAlexander V. Chernikov return (EINVAL); 826ac35ff17SAlexander V. Chernikov 827ac35ff17SAlexander V. Chernikov /* Check if passed data is too long */ 828ac35ff17SAlexander V. Chernikov if (sd->valsize != sd->kavail) 829ac35ff17SAlexander V. Chernikov return (EINVAL); 830ac35ff17SAlexander V. Chernikov 831ac35ff17SAlexander V. Chernikov oh = (ipfw_obj_header *)sd->kbuf; 832ac35ff17SAlexander V. Chernikov 833ac35ff17SAlexander V. Chernikov /* Basic length checks for TLVs */ 834ac35ff17SAlexander V. Chernikov if (oh->ntlv.head.length != sizeof(oh->ntlv)) 835ac35ff17SAlexander V. Chernikov return (EINVAL); 836ac35ff17SAlexander V. Chernikov 837ac35ff17SAlexander V. Chernikov read = sizeof(*oh); 838ac35ff17SAlexander V. Chernikov 839db785d31SAlexander V. Chernikov ctlv = (ipfw_obj_ctlv *)(oh + 1); 840db785d31SAlexander V. Chernikov if (ctlv->head.length + read != sd->valsize) 841db785d31SAlexander V. Chernikov return (EINVAL); 842db785d31SAlexander V. Chernikov 843db785d31SAlexander V. Chernikov read += sizeof(*ctlv); 844db785d31SAlexander V. Chernikov tent = (ipfw_obj_tentry *)(ctlv + 1); 8453a845e10SAlexander V. Chernikov if (ctlv->count * sizeof(*tent) + read != sd->valsize) 846ac35ff17SAlexander V. Chernikov return (EINVAL); 847ac35ff17SAlexander V. Chernikov 8483a845e10SAlexander V. Chernikov if (ctlv->count == 0) 8493a845e10SAlexander V. Chernikov return (0); 850ac35ff17SAlexander V. Chernikov 8513a845e10SAlexander V. Chernikov /* 8523a845e10SAlexander V. Chernikov * Mark entire buffer as "read". 85335e1bbd0SAlexander V. Chernikov * This instructs sopt api write it back 8543a845e10SAlexander V. Chernikov * after function return. 8553a845e10SAlexander V. Chernikov */ 8563a845e10SAlexander V. Chernikov ipfw_get_sopt_header(sd, sd->valsize); 8573a845e10SAlexander V. Chernikov 8583a845e10SAlexander V. Chernikov /* Perform basic checks for each entry */ 8593a845e10SAlexander V. Chernikov ptent = tent; 8603a845e10SAlexander V. Chernikov kidx = tent->idx; 8613a845e10SAlexander V. Chernikov for (i = 0; i < ctlv->count; i++, ptent++) { 8623a845e10SAlexander V. Chernikov if (ptent->head.length != sizeof(*ptent)) 8633a845e10SAlexander V. Chernikov return (EINVAL); 8643a845e10SAlexander V. Chernikov if (ptent->idx != kidx) 8653a845e10SAlexander V. Chernikov return (ENOTSUP); 8663a845e10SAlexander V. Chernikov } 8673a845e10SAlexander V. Chernikov 8683a845e10SAlexander V. Chernikov /* Convert data into kernel request objects */ 86981d3153dSAlexander V. Chernikov objheader_to_ti(oh, &ti); 870ac35ff17SAlexander V. Chernikov ti.type = oh->ntlv.type; 8713a845e10SAlexander V. Chernikov ti.uidx = kidx; 8723a845e10SAlexander V. Chernikov 8733a845e10SAlexander V. Chernikov /* Use on-stack buffer for single add/del */ 8743a845e10SAlexander V. Chernikov if (ctlv->count == 1) { 8753a845e10SAlexander V. Chernikov memset(&tei, 0, sizeof(tei)); 8763a845e10SAlexander V. Chernikov tei_buf = &tei; 8773a845e10SAlexander V. Chernikov } else 8783a845e10SAlexander V. Chernikov tei_buf = malloc(ctlv->count * sizeof(tei), M_TEMP, 8793a845e10SAlexander V. Chernikov M_WAITOK | M_ZERO); 8803a845e10SAlexander V. Chernikov 8813a845e10SAlexander V. Chernikov ptei = tei_buf; 8823a845e10SAlexander V. Chernikov ptent = tent; 8833a845e10SAlexander V. Chernikov for (i = 0; i < ctlv->count; i++, ptent++, ptei++) { 8843a845e10SAlexander V. Chernikov ptei->paddr = &ptent->k; 8853a845e10SAlexander V. Chernikov ptei->subtype = ptent->subtype; 8863a845e10SAlexander V. Chernikov ptei->masklen = ptent->masklen; 8873a845e10SAlexander V. Chernikov if (ptent->head.flags & IPFW_TF_UPDATE) 8883a845e10SAlexander V. Chernikov ptei->flags |= TEI_FLAGS_UPDATE; 8893a845e10SAlexander V. Chernikov ptei->value = ptent->value; 8903a845e10SAlexander V. Chernikov } 891ac35ff17SAlexander V. Chernikov 892ac35ff17SAlexander V. Chernikov error = (oh->opheader.opcode == IP_FW_TABLE_XADD) ? 8933a845e10SAlexander V. Chernikov add_table_entry(ch, &ti, tei_buf, ctlv->flags, ctlv->count) : 8943a845e10SAlexander V. Chernikov del_table_entry(ch, &ti, tei_buf, ctlv->flags, ctlv->count); 8953a845e10SAlexander V. Chernikov 8963a845e10SAlexander V. Chernikov /* Translate result back to userland */ 8973a845e10SAlexander V. Chernikov ptei = tei_buf; 8983a845e10SAlexander V. Chernikov ptent = tent; 8993a845e10SAlexander V. Chernikov for (i = 0; i < ctlv->count; i++, ptent++, ptei++) { 9003a845e10SAlexander V. Chernikov if (ptei->flags & TEI_FLAGS_ADDED) 9013a845e10SAlexander V. Chernikov ptent->result = IPFW_TR_ADDED; 9023a845e10SAlexander V. Chernikov else if (ptei->flags & TEI_FLAGS_DELETED) 9033a845e10SAlexander V. Chernikov ptent->result = IPFW_TR_DELETED; 9043a845e10SAlexander V. Chernikov else if (ptei->flags & TEI_FLAGS_UPDATED) 9053a845e10SAlexander V. Chernikov ptent->result = IPFW_TR_UPDATED; 9063a845e10SAlexander V. Chernikov else if (ptei->flags & TEI_FLAGS_LIMIT) 9073a845e10SAlexander V. Chernikov ptent->result = IPFW_TR_LIMIT; 9083a845e10SAlexander V. Chernikov else if (ptei->flags & TEI_FLAGS_ERROR) 9093a845e10SAlexander V. Chernikov ptent->result = IPFW_TR_ERROR; 9103a845e10SAlexander V. Chernikov else if (ptei->flags & TEI_FLAGS_NOTFOUND) 9113a845e10SAlexander V. Chernikov ptent->result = IPFW_TR_NOTFOUND; 9123a845e10SAlexander V. Chernikov else if (ptei->flags & TEI_FLAGS_EXISTS) 9133a845e10SAlexander V. Chernikov ptent->result = IPFW_TR_EXISTS; 9143a845e10SAlexander V. Chernikov } 9153a845e10SAlexander V. Chernikov 9163a845e10SAlexander V. Chernikov if (tei_buf != &tei) 9173a845e10SAlexander V. Chernikov free(tei_buf, M_TEMP); 918ac35ff17SAlexander V. Chernikov 919ac35ff17SAlexander V. Chernikov return (error); 920ac35ff17SAlexander V. Chernikov } 921ac35ff17SAlexander V. Chernikov 92281d3153dSAlexander V. Chernikov /* 92381d3153dSAlexander V. Chernikov * Looks up an entry in given table. 92481d3153dSAlexander V. Chernikov * Data layout (v0)(current): 92581d3153dSAlexander V. Chernikov * Request: [ ipfw_obj_header ipfw_obj_tentry ] 92681d3153dSAlexander V. Chernikov * Reply: [ ipfw_obj_header ipfw_obj_tentry ] 92781d3153dSAlexander V. Chernikov * 92881d3153dSAlexander V. Chernikov * Returns 0 on success 92981d3153dSAlexander V. Chernikov */ 93081d3153dSAlexander V. Chernikov int 93181d3153dSAlexander V. Chernikov ipfw_find_table_entry(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 93281d3153dSAlexander V. Chernikov struct sockopt_data *sd) 93381d3153dSAlexander V. Chernikov { 93481d3153dSAlexander V. Chernikov ipfw_obj_tentry *tent; 93581d3153dSAlexander V. Chernikov ipfw_obj_header *oh; 93681d3153dSAlexander V. Chernikov struct tid_info ti; 93781d3153dSAlexander V. Chernikov struct table_config *tc; 93881d3153dSAlexander V. Chernikov struct table_algo *ta; 93981d3153dSAlexander V. Chernikov struct table_info *kti; 94081d3153dSAlexander V. Chernikov struct namedobj_instance *ni; 941914bffb6SAlexander V. Chernikov int error; 94281d3153dSAlexander V. Chernikov size_t sz; 94381d3153dSAlexander V. Chernikov 94481d3153dSAlexander V. Chernikov /* Check minimum header size */ 94581d3153dSAlexander V. Chernikov sz = sizeof(*oh) + sizeof(*tent); 94681d3153dSAlexander V. Chernikov if (sd->valsize != sz) 94781d3153dSAlexander V. Chernikov return (EINVAL); 94881d3153dSAlexander V. Chernikov 94981d3153dSAlexander V. Chernikov oh = (struct _ipfw_obj_header *)ipfw_get_sopt_header(sd, sz); 95081d3153dSAlexander V. Chernikov tent = (ipfw_obj_tentry *)(oh + 1); 95181d3153dSAlexander V. Chernikov 95281d3153dSAlexander V. Chernikov /* Basic length checks for TLVs */ 95381d3153dSAlexander V. Chernikov if (oh->ntlv.head.length != sizeof(oh->ntlv)) 95481d3153dSAlexander V. Chernikov return (EINVAL); 95581d3153dSAlexander V. Chernikov 95681d3153dSAlexander V. Chernikov objheader_to_ti(oh, &ti); 95781d3153dSAlexander V. Chernikov ti.type = oh->ntlv.type; 95881d3153dSAlexander V. Chernikov ti.uidx = tent->idx; 95981d3153dSAlexander V. Chernikov 96081d3153dSAlexander V. Chernikov IPFW_UH_RLOCK(ch); 96181d3153dSAlexander V. Chernikov ni = CHAIN_TO_NI(ch); 96281d3153dSAlexander V. Chernikov 96381d3153dSAlexander V. Chernikov /* 96481d3153dSAlexander V. Chernikov * Find existing table and check its type . 96581d3153dSAlexander V. Chernikov */ 96681d3153dSAlexander V. Chernikov ta = NULL; 96781d3153dSAlexander V. Chernikov if ((tc = find_table(ni, &ti)) == NULL) { 96881d3153dSAlexander V. Chernikov IPFW_UH_RUNLOCK(ch); 96981d3153dSAlexander V. Chernikov return (ESRCH); 97081d3153dSAlexander V. Chernikov } 97181d3153dSAlexander V. Chernikov 97281d3153dSAlexander V. Chernikov /* check table type */ 97381d3153dSAlexander V. Chernikov if (tc->no.type != ti.type) { 97481d3153dSAlexander V. Chernikov IPFW_UH_RUNLOCK(ch); 97581d3153dSAlexander V. Chernikov return (EINVAL); 97681d3153dSAlexander V. Chernikov } 97781d3153dSAlexander V. Chernikov 97881d3153dSAlexander V. Chernikov kti = KIDX_TO_TI(ch, tc->no.kidx); 97981d3153dSAlexander V. Chernikov ta = tc->ta; 98081d3153dSAlexander V. Chernikov 981914bffb6SAlexander V. Chernikov if (ta->find_tentry == NULL) 982914bffb6SAlexander V. Chernikov return (ENOTSUP); 983914bffb6SAlexander V. Chernikov 984914bffb6SAlexander V. Chernikov error = ta->find_tentry(tc->astate, kti, tent); 98581d3153dSAlexander V. Chernikov 98681d3153dSAlexander V. Chernikov IPFW_UH_RUNLOCK(ch); 98781d3153dSAlexander V. Chernikov 98881d3153dSAlexander V. Chernikov return (error); 98981d3153dSAlexander V. Chernikov } 99081d3153dSAlexander V. Chernikov 99146d52008SAlexander V. Chernikov /* 99246d52008SAlexander V. Chernikov * Flushes all entries or destroys given table. 99346d52008SAlexander V. Chernikov * Data layout (v0)(current): 99446d52008SAlexander V. Chernikov * Request: [ ipfw_obj_header ] 99546d52008SAlexander V. Chernikov * 99646d52008SAlexander V. Chernikov * Returns 0 on success 99746d52008SAlexander V. Chernikov */ 998ac35ff17SAlexander V. Chernikov int 999ac35ff17SAlexander V. Chernikov ipfw_flush_table(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 1000ac35ff17SAlexander V. Chernikov struct sockopt_data *sd) 1001ac35ff17SAlexander V. Chernikov { 1002ac35ff17SAlexander V. Chernikov int error; 1003ac35ff17SAlexander V. Chernikov struct _ipfw_obj_header *oh; 1004ac35ff17SAlexander V. Chernikov struct tid_info ti; 1005ac35ff17SAlexander V. Chernikov 1006ac35ff17SAlexander V. Chernikov if (sd->valsize != sizeof(*oh)) 1007ac35ff17SAlexander V. Chernikov return (EINVAL); 1008ac35ff17SAlexander V. Chernikov 1009ac35ff17SAlexander V. Chernikov oh = (struct _ipfw_obj_header *)op3; 1010ac35ff17SAlexander V. Chernikov objheader_to_ti(oh, &ti); 1011ac35ff17SAlexander V. Chernikov 10121832a7b3SAlexander V. Chernikov if (op3->opcode == IP_FW_TABLE_XDESTROY) 1013ac35ff17SAlexander V. Chernikov error = destroy_table(ch, &ti); 10141832a7b3SAlexander V. Chernikov else if (op3->opcode == IP_FW_TABLE_XFLUSH) 1015ac35ff17SAlexander V. Chernikov error = flush_table(ch, &ti); 1016ac35ff17SAlexander V. Chernikov else 1017ac35ff17SAlexander V. Chernikov return (ENOTSUP); 1018ac35ff17SAlexander V. Chernikov 1019ac35ff17SAlexander V. Chernikov return (error); 10203b3a8eb9SGleb Smirnoff } 10213b3a8eb9SGleb Smirnoff 102235e1bbd0SAlexander V. Chernikov /* 102335e1bbd0SAlexander V. Chernikov * Flushes given table. 102435e1bbd0SAlexander V. Chernikov * 102535e1bbd0SAlexander V. Chernikov * Function create new table instance with the same 102635e1bbd0SAlexander V. Chernikov * parameters, swaps it with old one and 102735e1bbd0SAlexander V. Chernikov * flushes state without holding any locks. 102835e1bbd0SAlexander V. Chernikov * 102935e1bbd0SAlexander V. Chernikov * Returns 0 on success. 103035e1bbd0SAlexander V. Chernikov */ 10311832a7b3SAlexander V. Chernikov int 1032ac35ff17SAlexander V. Chernikov flush_table(struct ip_fw_chain *ch, struct tid_info *ti) 10333b3a8eb9SGleb Smirnoff { 1034b074b7bbSAlexander V. Chernikov struct namedobj_instance *ni; 1035b074b7bbSAlexander V. Chernikov struct table_config *tc; 10369f7d47b0SAlexander V. Chernikov struct table_algo *ta; 10379f7d47b0SAlexander V. Chernikov struct table_info ti_old, ti_new, *tablestate; 10389f7d47b0SAlexander V. Chernikov void *astate_old, *astate_new; 1039914bffb6SAlexander V. Chernikov char algostate[64], *pstate; 1040b074b7bbSAlexander V. Chernikov int error; 1041b074b7bbSAlexander V. Chernikov uint16_t kidx; 1042914bffb6SAlexander V. Chernikov uint8_t tflags; 10433b3a8eb9SGleb Smirnoff 10443b3a8eb9SGleb Smirnoff /* 10459f7d47b0SAlexander V. Chernikov * Stage 1: save table algoritm. 1046b074b7bbSAlexander V. Chernikov * Reference found table to ensure it won't disappear. 10473b3a8eb9SGleb Smirnoff */ 1048b074b7bbSAlexander V. Chernikov IPFW_UH_WLOCK(ch); 1049b074b7bbSAlexander V. Chernikov ni = CHAIN_TO_NI(ch); 1050b074b7bbSAlexander V. Chernikov if ((tc = find_table(ni, ti)) == NULL) { 1051b074b7bbSAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 1052b074b7bbSAlexander V. Chernikov return (ESRCH); 1053b074b7bbSAlexander V. Chernikov } 10549f7d47b0SAlexander V. Chernikov ta = tc->ta; 1055b074b7bbSAlexander V. Chernikov tc->no.refcnt++; 105635e1bbd0SAlexander V. Chernikov /* Save startup algo parameters */ 1057daabb523SAlexander V. Chernikov if (ta->print_config != NULL) { 1058daabb523SAlexander V. Chernikov ta->print_config(tc->astate, KIDX_TO_TI(ch, tc->no.kidx), 1059daabb523SAlexander V. Chernikov algostate, sizeof(algostate)); 1060daabb523SAlexander V. Chernikov pstate = algostate; 1061daabb523SAlexander V. Chernikov } else 1062daabb523SAlexander V. Chernikov pstate = NULL; 1063914bffb6SAlexander V. Chernikov tflags = tc->tflags; 1064b074b7bbSAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 10653b3a8eb9SGleb Smirnoff 1066b074b7bbSAlexander V. Chernikov /* 10679f7d47b0SAlexander V. Chernikov * Stage 2: allocate new table instance using same algo. 1068b074b7bbSAlexander V. Chernikov */ 10699f7d47b0SAlexander V. Chernikov memset(&ti_new, 0, sizeof(struct table_info)); 1070914bffb6SAlexander V. Chernikov if ((error = ta->init(ch, &astate_new, &ti_new, pstate, tflags)) != 0) { 1071b074b7bbSAlexander V. Chernikov IPFW_UH_WLOCK(ch); 1072b074b7bbSAlexander V. Chernikov tc->no.refcnt--; 1073b074b7bbSAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 1074b074b7bbSAlexander V. Chernikov return (error); 1075b074b7bbSAlexander V. Chernikov } 1076b074b7bbSAlexander V. Chernikov 1077b074b7bbSAlexander V. Chernikov /* 1078b074b7bbSAlexander V. Chernikov * Stage 3: swap old state pointers with newly-allocated ones. 1079b074b7bbSAlexander V. Chernikov * Decrease refcount. 1080b074b7bbSAlexander V. Chernikov */ 1081b074b7bbSAlexander V. Chernikov IPFW_UH_WLOCK(ch); 1082b074b7bbSAlexander V. Chernikov 1083b074b7bbSAlexander V. Chernikov ni = CHAIN_TO_NI(ch); 1084b074b7bbSAlexander V. Chernikov kidx = tc->no.kidx; 10859f7d47b0SAlexander V. Chernikov tablestate = (struct table_info *)ch->tablestate; 1086b074b7bbSAlexander V. Chernikov 10879f7d47b0SAlexander V. Chernikov IPFW_WLOCK(ch); 10889f7d47b0SAlexander V. Chernikov ti_old = tablestate[kidx]; 10899f7d47b0SAlexander V. Chernikov tablestate[kidx] = ti_new; 10909f7d47b0SAlexander V. Chernikov IPFW_WUNLOCK(ch); 1091b074b7bbSAlexander V. Chernikov 10929f7d47b0SAlexander V. Chernikov astate_old = tc->astate; 10939f7d47b0SAlexander V. Chernikov tc->astate = astate_new; 10949f7d47b0SAlexander V. Chernikov tc->ti = ti_new; 10959f7d47b0SAlexander V. Chernikov tc->count = 0; 1096b074b7bbSAlexander V. Chernikov tc->no.refcnt--; 1097b074b7bbSAlexander V. Chernikov 1098b074b7bbSAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 10993b3a8eb9SGleb Smirnoff 1100b074b7bbSAlexander V. Chernikov /* 1101b074b7bbSAlexander V. Chernikov * Stage 4: perform real flush. 1102b074b7bbSAlexander V. Chernikov */ 11039f7d47b0SAlexander V. Chernikov ta->destroy(astate_old, &ti_old); 11043b3a8eb9SGleb Smirnoff 11053b3a8eb9SGleb Smirnoff return (0); 11063b3a8eb9SGleb Smirnoff } 11073b3a8eb9SGleb Smirnoff 1108b074b7bbSAlexander V. Chernikov /* 110946d52008SAlexander V. Chernikov * Swaps two tables. 111046d52008SAlexander V. Chernikov * Data layout (v0)(current): 111146d52008SAlexander V. Chernikov * Request: [ ipfw_obj_header ipfw_obj_ntlv ] 111246d52008SAlexander V. Chernikov * 111346d52008SAlexander V. Chernikov * Returns 0 on success 111446d52008SAlexander V. Chernikov */ 111546d52008SAlexander V. Chernikov int 111646d52008SAlexander V. Chernikov ipfw_swap_table(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 111746d52008SAlexander V. Chernikov struct sockopt_data *sd) 111846d52008SAlexander V. Chernikov { 111946d52008SAlexander V. Chernikov int error; 112046d52008SAlexander V. Chernikov struct _ipfw_obj_header *oh; 112146d52008SAlexander V. Chernikov struct tid_info ti_a, ti_b; 112246d52008SAlexander V. Chernikov 112346d52008SAlexander V. Chernikov if (sd->valsize != sizeof(*oh) + sizeof(ipfw_obj_ntlv)) 112446d52008SAlexander V. Chernikov return (EINVAL); 112546d52008SAlexander V. Chernikov 112646d52008SAlexander V. Chernikov oh = (struct _ipfw_obj_header *)op3; 112746d52008SAlexander V. Chernikov ntlv_to_ti(&oh->ntlv, &ti_a); 112846d52008SAlexander V. Chernikov ntlv_to_ti((ipfw_obj_ntlv *)(oh + 1), &ti_b); 112946d52008SAlexander V. Chernikov 1130a73d728dSAlexander V. Chernikov error = swap_tables(ch, &ti_a, &ti_b); 113146d52008SAlexander V. Chernikov 113246d52008SAlexander V. Chernikov return (error); 113346d52008SAlexander V. Chernikov } 113446d52008SAlexander V. Chernikov 113535e1bbd0SAlexander V. Chernikov /* 113635e1bbd0SAlexander V. Chernikov * Swaps two tables of the same type/valtype. 113735e1bbd0SAlexander V. Chernikov * 113835e1bbd0SAlexander V. Chernikov * Checks if tables are compatible and limits 1139c8d5d308SAlexander V. Chernikov * permits swap, than actually perform swap. 114035e1bbd0SAlexander V. Chernikov * 1141c8d5d308SAlexander V. Chernikov * Each table consists of 2 different parts: 1142c8d5d308SAlexander V. Chernikov * config: 1143c8d5d308SAlexander V. Chernikov * @tc (with name, set, kidx) and rule bindings, which is "stable". 1144c8d5d308SAlexander V. Chernikov * number of items 1145c8d5d308SAlexander V. Chernikov * table algo 1146c8d5d308SAlexander V. Chernikov * runtime: 1147c8d5d308SAlexander V. Chernikov * runtime data @ti (ch->tablestate) 1148c8d5d308SAlexander V. Chernikov * runtime cache in @tc 1149c8d5d308SAlexander V. Chernikov * algo-specific data (@tc->astate) 1150c8d5d308SAlexander V. Chernikov * 1151c8d5d308SAlexander V. Chernikov * So we switch: 1152c8d5d308SAlexander V. Chernikov * all runtime data 1153c8d5d308SAlexander V. Chernikov * number of items 1154c8d5d308SAlexander V. Chernikov * table algo 1155c8d5d308SAlexander V. Chernikov * 1156c8d5d308SAlexander V. Chernikov * After that we call @ti change handler for each table. 1157c8d5d308SAlexander V. Chernikov * 1158c8d5d308SAlexander V. Chernikov * Note that referencing @tc won't protect tc->ta from change. 1159c8d5d308SAlexander V. Chernikov * XXX: Do we need to restrict swap between locked tables? 1160c8d5d308SAlexander V. Chernikov * XXX: Do we need to exchange ftype? 116135e1bbd0SAlexander V. Chernikov * 116235e1bbd0SAlexander V. Chernikov * Returns 0 on success. 116335e1bbd0SAlexander V. Chernikov */ 116446d52008SAlexander V. Chernikov static int 1165a73d728dSAlexander V. Chernikov swap_tables(struct ip_fw_chain *ch, struct tid_info *a, 116646d52008SAlexander V. Chernikov struct tid_info *b) 116746d52008SAlexander V. Chernikov { 116846d52008SAlexander V. Chernikov struct namedobj_instance *ni; 116946d52008SAlexander V. Chernikov struct table_config *tc_a, *tc_b; 117046d52008SAlexander V. Chernikov struct table_algo *ta; 117146d52008SAlexander V. Chernikov struct table_info ti, *tablestate; 117246d52008SAlexander V. Chernikov void *astate; 117346d52008SAlexander V. Chernikov uint32_t count; 117446d52008SAlexander V. Chernikov 117546d52008SAlexander V. Chernikov /* 117646d52008SAlexander V. Chernikov * Stage 1: find both tables and ensure they are of 117735e1bbd0SAlexander V. Chernikov * the same type. 117846d52008SAlexander V. Chernikov */ 117946d52008SAlexander V. Chernikov IPFW_UH_WLOCK(ch); 118046d52008SAlexander V. Chernikov ni = CHAIN_TO_NI(ch); 118146d52008SAlexander V. Chernikov if ((tc_a = find_table(ni, a)) == NULL) { 118246d52008SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 118346d52008SAlexander V. Chernikov return (ESRCH); 118446d52008SAlexander V. Chernikov } 118546d52008SAlexander V. Chernikov if ((tc_b = find_table(ni, b)) == NULL) { 118646d52008SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 118746d52008SAlexander V. Chernikov return (ESRCH); 118846d52008SAlexander V. Chernikov } 118946d52008SAlexander V. Chernikov 119046d52008SAlexander V. Chernikov /* It is very easy to swap between the same table */ 119146d52008SAlexander V. Chernikov if (tc_a == tc_b) { 119246d52008SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 119346d52008SAlexander V. Chernikov return (0); 119446d52008SAlexander V. Chernikov } 119546d52008SAlexander V. Chernikov 119646d52008SAlexander V. Chernikov /* Check type and value are the same */ 119746d52008SAlexander V. Chernikov if (tc_a->no.type != tc_b->no.type || tc_a->tflags != tc_b->tflags || 119846d52008SAlexander V. Chernikov tc_a->vtype != tc_b->vtype) { 119946d52008SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 120046d52008SAlexander V. Chernikov return (EINVAL); 120146d52008SAlexander V. Chernikov } 120246d52008SAlexander V. Chernikov 120346d52008SAlexander V. Chernikov /* Check limits before swap */ 120446d52008SAlexander V. Chernikov if ((tc_a->limit != 0 && tc_b->count > tc_a->limit) || 120546d52008SAlexander V. Chernikov (tc_b->limit != 0 && tc_a->count > tc_b->limit)) { 120646d52008SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 120746d52008SAlexander V. Chernikov return (EFBIG); 120846d52008SAlexander V. Chernikov } 120946d52008SAlexander V. Chernikov 121046d52008SAlexander V. Chernikov /* Everything is fine, prepare to swap */ 121146d52008SAlexander V. Chernikov tablestate = (struct table_info *)ch->tablestate; 121246d52008SAlexander V. Chernikov ti = tablestate[tc_a->no.kidx]; 121346d52008SAlexander V. Chernikov ta = tc_a->ta; 121446d52008SAlexander V. Chernikov astate = tc_a->astate; 121546d52008SAlexander V. Chernikov count = tc_a->count; 121646d52008SAlexander V. Chernikov 121746d52008SAlexander V. Chernikov IPFW_WLOCK(ch); 121846d52008SAlexander V. Chernikov /* a <- b */ 121946d52008SAlexander V. Chernikov tablestate[tc_a->no.kidx] = tablestate[tc_b->no.kidx]; 122046d52008SAlexander V. Chernikov tc_a->ta = tc_b->ta; 122146d52008SAlexander V. Chernikov tc_a->astate = tc_b->astate; 122246d52008SAlexander V. Chernikov tc_a->count = tc_b->count; 122346d52008SAlexander V. Chernikov /* b <- a */ 122446d52008SAlexander V. Chernikov tablestate[tc_b->no.kidx] = ti; 122546d52008SAlexander V. Chernikov tc_b->ta = ta; 122646d52008SAlexander V. Chernikov tc_b->astate = astate; 122746d52008SAlexander V. Chernikov tc_b->count = count; 122846d52008SAlexander V. Chernikov IPFW_WUNLOCK(ch); 122946d52008SAlexander V. Chernikov 123046d52008SAlexander V. Chernikov /* Ensure tc.ti copies are in sync */ 123146d52008SAlexander V. Chernikov tc_a->ti = tablestate[tc_a->no.kidx]; 123246d52008SAlexander V. Chernikov tc_b->ti = tablestate[tc_b->no.kidx]; 123346d52008SAlexander V. Chernikov 123446d52008SAlexander V. Chernikov /* Notify both tables on @ti change */ 123546d52008SAlexander V. Chernikov if (tc_a->ta->change_ti != NULL) 123646d52008SAlexander V. Chernikov tc_a->ta->change_ti(tc_a->astate, &tablestate[tc_a->no.kidx]); 123746d52008SAlexander V. Chernikov if (tc_b->ta->change_ti != NULL) 123846d52008SAlexander V. Chernikov tc_b->ta->change_ti(tc_b->astate, &tablestate[tc_b->no.kidx]); 123946d52008SAlexander V. Chernikov 124046d52008SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 124146d52008SAlexander V. Chernikov 124246d52008SAlexander V. Chernikov return (0); 124346d52008SAlexander V. Chernikov } 124446d52008SAlexander V. Chernikov 124546d52008SAlexander V. Chernikov /* 12469f7d47b0SAlexander V. Chernikov * Destroys table specified by @ti. 1247ac35ff17SAlexander V. Chernikov * Data layout (v0)(current): 1248ac35ff17SAlexander V. Chernikov * Request: [ ip_fw3_opheader ] 1249ac35ff17SAlexander V. Chernikov * 1250ac35ff17SAlexander V. Chernikov * Returns 0 on success 1251b074b7bbSAlexander V. Chernikov */ 1252ac35ff17SAlexander V. Chernikov static int 1253ac35ff17SAlexander V. Chernikov destroy_table(struct ip_fw_chain *ch, struct tid_info *ti) 1254b074b7bbSAlexander V. Chernikov { 1255b074b7bbSAlexander V. Chernikov struct namedobj_instance *ni; 1256b074b7bbSAlexander V. Chernikov struct table_config *tc; 1257b074b7bbSAlexander V. Chernikov 1258b074b7bbSAlexander V. Chernikov IPFW_UH_WLOCK(ch); 1259b074b7bbSAlexander V. Chernikov 1260b074b7bbSAlexander V. Chernikov ni = CHAIN_TO_NI(ch); 1261b074b7bbSAlexander V. Chernikov if ((tc = find_table(ni, ti)) == NULL) { 1262b074b7bbSAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 1263b074b7bbSAlexander V. Chernikov return (ESRCH); 1264b074b7bbSAlexander V. Chernikov } 1265b074b7bbSAlexander V. Chernikov 12669f7d47b0SAlexander V. Chernikov /* Do not permit destroying referenced tables */ 12679f7d47b0SAlexander V. Chernikov if (tc->no.refcnt > 0) { 1268b074b7bbSAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 1269b074b7bbSAlexander V. Chernikov return (EBUSY); 1270b074b7bbSAlexander V. Chernikov } 1271b074b7bbSAlexander V. Chernikov 1272b074b7bbSAlexander V. Chernikov IPFW_WLOCK(ch); 1273b074b7bbSAlexander V. Chernikov unlink_table(ch, tc); 1274b074b7bbSAlexander V. Chernikov IPFW_WUNLOCK(ch); 1275b074b7bbSAlexander V. Chernikov 1276b074b7bbSAlexander V. Chernikov /* Free obj index */ 1277ac35ff17SAlexander V. Chernikov if (ipfw_objhash_free_idx(ni, tc->no.kidx) != 0) 1278b074b7bbSAlexander V. Chernikov printf("Error unlinking kidx %d from table %s\n", 1279b074b7bbSAlexander V. Chernikov tc->no.kidx, tc->tablename); 1280b074b7bbSAlexander V. Chernikov 1281b074b7bbSAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 1282b074b7bbSAlexander V. Chernikov 1283b074b7bbSAlexander V. Chernikov free_table_config(ni, tc); 1284b074b7bbSAlexander V. Chernikov 1285b074b7bbSAlexander V. Chernikov return (0); 1286b074b7bbSAlexander V. Chernikov } 1287b074b7bbSAlexander V. Chernikov 1288b074b7bbSAlexander V. Chernikov static void 1289b074b7bbSAlexander V. Chernikov destroy_table_locked(struct namedobj_instance *ni, struct named_object *no, 1290b074b7bbSAlexander V. Chernikov void *arg) 1291b074b7bbSAlexander V. Chernikov { 1292b074b7bbSAlexander V. Chernikov 1293b074b7bbSAlexander V. Chernikov unlink_table((struct ip_fw_chain *)arg, (struct table_config *)no); 1294ac35ff17SAlexander V. Chernikov if (ipfw_objhash_free_idx(ni, no->kidx) != 0) 1295b074b7bbSAlexander V. Chernikov printf("Error unlinking kidx %d from table %s\n", 1296b074b7bbSAlexander V. Chernikov no->kidx, no->name); 1297b074b7bbSAlexander V. Chernikov free_table_config(ni, (struct table_config *)no); 1298b074b7bbSAlexander V. Chernikov } 1299b074b7bbSAlexander V. Chernikov 130035e1bbd0SAlexander V. Chernikov /* 130135e1bbd0SAlexander V. Chernikov * Shuts tables module down. 130235e1bbd0SAlexander V. Chernikov */ 13033b3a8eb9SGleb Smirnoff void 13043b3a8eb9SGleb Smirnoff ipfw_destroy_tables(struct ip_fw_chain *ch) 13053b3a8eb9SGleb Smirnoff { 13063b3a8eb9SGleb Smirnoff 1307b074b7bbSAlexander V. Chernikov /* Remove all tables from working set */ 1308b074b7bbSAlexander V. Chernikov IPFW_UH_WLOCK(ch); 1309b074b7bbSAlexander V. Chernikov IPFW_WLOCK(ch); 1310b074b7bbSAlexander V. Chernikov ipfw_objhash_foreach(CHAIN_TO_NI(ch), destroy_table_locked, ch); 1311b074b7bbSAlexander V. Chernikov IPFW_WUNLOCK(ch); 1312b074b7bbSAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 13133b3a8eb9SGleb Smirnoff 13143b3a8eb9SGleb Smirnoff /* Free pointers itself */ 13159f7d47b0SAlexander V. Chernikov free(ch->tablestate, M_IPFW); 13169f7d47b0SAlexander V. Chernikov 13179f7d47b0SAlexander V. Chernikov ipfw_table_algo_destroy(ch); 1318b074b7bbSAlexander V. Chernikov 1319b074b7bbSAlexander V. Chernikov ipfw_objhash_destroy(CHAIN_TO_NI(ch)); 1320b074b7bbSAlexander V. Chernikov free(CHAIN_TO_TCFG(ch), M_IPFW); 13213b3a8eb9SGleb Smirnoff } 13223b3a8eb9SGleb Smirnoff 132335e1bbd0SAlexander V. Chernikov /* 132435e1bbd0SAlexander V. Chernikov * Starts tables module. 132535e1bbd0SAlexander V. Chernikov */ 13263b3a8eb9SGleb Smirnoff int 13273b3a8eb9SGleb Smirnoff ipfw_init_tables(struct ip_fw_chain *ch) 13283b3a8eb9SGleb Smirnoff { 1329b074b7bbSAlexander V. Chernikov struct tables_config *tcfg; 1330b074b7bbSAlexander V. Chernikov 13313b3a8eb9SGleb Smirnoff /* Allocate pointers */ 13329f7d47b0SAlexander V. Chernikov ch->tablestate = malloc(V_fw_tables_max * sizeof(struct table_info), 13339f7d47b0SAlexander V. Chernikov M_IPFW, M_WAITOK | M_ZERO); 1334b074b7bbSAlexander V. Chernikov 1335b074b7bbSAlexander V. Chernikov tcfg = malloc(sizeof(struct tables_config), M_IPFW, M_WAITOK | M_ZERO); 1336b074b7bbSAlexander V. Chernikov tcfg->namehash = ipfw_objhash_create(V_fw_tables_max); 1337b074b7bbSAlexander V. Chernikov ch->tblcfg = tcfg; 1338b074b7bbSAlexander V. Chernikov 13399f7d47b0SAlexander V. Chernikov ipfw_table_algo_init(ch); 13409f7d47b0SAlexander V. Chernikov 13413b3a8eb9SGleb Smirnoff return (0); 13423b3a8eb9SGleb Smirnoff } 13433b3a8eb9SGleb Smirnoff 134435e1bbd0SAlexander V. Chernikov /* 134535e1bbd0SAlexander V. Chernikov * Grow tables index. 134635e1bbd0SAlexander V. Chernikov * 134735e1bbd0SAlexander V. Chernikov * Returns 0 on success. 134835e1bbd0SAlexander V. Chernikov */ 13493b3a8eb9SGleb Smirnoff int 13503b3a8eb9SGleb Smirnoff ipfw_resize_tables(struct ip_fw_chain *ch, unsigned int ntables) 13513b3a8eb9SGleb Smirnoff { 13523b3a8eb9SGleb Smirnoff unsigned int ntables_old, tbl; 1353b074b7bbSAlexander V. Chernikov struct namedobj_instance *ni; 13549f7d47b0SAlexander V. Chernikov void *new_idx, *old_tablestate, *tablestate; 135568394ec8SAlexander V. Chernikov struct table_info *ti; 135668394ec8SAlexander V. Chernikov struct table_config *tc; 135768394ec8SAlexander V. Chernikov int i, new_blocks; 13583b3a8eb9SGleb Smirnoff 13593b3a8eb9SGleb Smirnoff /* Check new value for validity */ 13603b3a8eb9SGleb Smirnoff if (ntables > IPFW_TABLES_MAX) 13613b3a8eb9SGleb Smirnoff ntables = IPFW_TABLES_MAX; 13623b3a8eb9SGleb Smirnoff 13633b3a8eb9SGleb Smirnoff /* Allocate new pointers */ 13649f7d47b0SAlexander V. Chernikov tablestate = malloc(ntables * sizeof(struct table_info), 13659f7d47b0SAlexander V. Chernikov M_IPFW, M_WAITOK | M_ZERO); 13669f7d47b0SAlexander V. Chernikov 1367b074b7bbSAlexander V. Chernikov ipfw_objhash_bitmap_alloc(ntables, (void *)&new_idx, &new_blocks); 13683b3a8eb9SGleb Smirnoff 13699f7d47b0SAlexander V. Chernikov IPFW_UH_WLOCK(ch); 13703b3a8eb9SGleb Smirnoff 13713b3a8eb9SGleb Smirnoff tbl = (ntables >= V_fw_tables_max) ? V_fw_tables_max : ntables; 1372b074b7bbSAlexander V. Chernikov ni = CHAIN_TO_NI(ch); 1373b074b7bbSAlexander V. Chernikov 13749f7d47b0SAlexander V. Chernikov /* Temporary restrict decreasing max_tables */ 13759f7d47b0SAlexander V. Chernikov if (ntables < V_fw_tables_max) { 13769f7d47b0SAlexander V. Chernikov 13779f7d47b0SAlexander V. Chernikov /* 13789f7d47b0SAlexander V. Chernikov * FIXME: Check if we really can shrink 13799f7d47b0SAlexander V. Chernikov */ 13809f7d47b0SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 1381b074b7bbSAlexander V. Chernikov return (EINVAL); 1382b074b7bbSAlexander V. Chernikov } 13833b3a8eb9SGleb Smirnoff 13849f7d47b0SAlexander V. Chernikov /* Copy table info/indices */ 13859f7d47b0SAlexander V. Chernikov memcpy(tablestate, ch->tablestate, sizeof(struct table_info) * tbl); 13869f7d47b0SAlexander V. Chernikov ipfw_objhash_bitmap_merge(ni, &new_idx, &new_blocks); 13873b3a8eb9SGleb Smirnoff 13889f7d47b0SAlexander V. Chernikov IPFW_WLOCK(ch); 13899f7d47b0SAlexander V. Chernikov 13909f7d47b0SAlexander V. Chernikov /* Change pointers */ 13919f7d47b0SAlexander V. Chernikov old_tablestate = ch->tablestate; 13929f7d47b0SAlexander V. Chernikov ch->tablestate = tablestate; 13939f7d47b0SAlexander V. Chernikov ipfw_objhash_bitmap_swap(ni, &new_idx, &new_blocks); 13943b3a8eb9SGleb Smirnoff 13953b3a8eb9SGleb Smirnoff ntables_old = V_fw_tables_max; 13963b3a8eb9SGleb Smirnoff V_fw_tables_max = ntables; 13973b3a8eb9SGleb Smirnoff 13983b3a8eb9SGleb Smirnoff IPFW_WUNLOCK(ch); 139968394ec8SAlexander V. Chernikov 140068394ec8SAlexander V. Chernikov /* Notify all consumers that their @ti pointer has changed */ 140168394ec8SAlexander V. Chernikov ti = (struct table_info *)ch->tablestate; 140268394ec8SAlexander V. Chernikov for (i = 0; i < tbl; i++, ti++) { 140368394ec8SAlexander V. Chernikov if (ti->lookup == NULL) 140468394ec8SAlexander V. Chernikov continue; 140568394ec8SAlexander V. Chernikov tc = (struct table_config *)ipfw_objhash_lookup_kidx(ni, i); 140668394ec8SAlexander V. Chernikov if (tc == NULL || tc->ta->change_ti == NULL) 140768394ec8SAlexander V. Chernikov continue; 140868394ec8SAlexander V. Chernikov 140968394ec8SAlexander V. Chernikov tc->ta->change_ti(tc->astate, ti); 141068394ec8SAlexander V. Chernikov } 141168394ec8SAlexander V. Chernikov 14129f7d47b0SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 14133b3a8eb9SGleb Smirnoff 14143b3a8eb9SGleb Smirnoff /* Free old pointers */ 14159f7d47b0SAlexander V. Chernikov free(old_tablestate, M_IPFW); 1416b074b7bbSAlexander V. Chernikov ipfw_objhash_bitmap_free(new_idx, new_blocks); 14173b3a8eb9SGleb Smirnoff 14183b3a8eb9SGleb Smirnoff return (0); 14193b3a8eb9SGleb Smirnoff } 14203b3a8eb9SGleb Smirnoff 1421a73d728dSAlexander V. Chernikov /* 142235e1bbd0SAlexander V. Chernikov * Switch between "set 0" and "rule's set" table binding, 1423a73d728dSAlexander V. Chernikov * Check all ruleset bindings and permits changing 1424a73d728dSAlexander V. Chernikov * IFF each binding has both rule AND table in default set (set 0). 1425a73d728dSAlexander V. Chernikov * 1426a73d728dSAlexander V. Chernikov * Returns 0 on success. 1427a73d728dSAlexander V. Chernikov */ 1428a73d728dSAlexander V. Chernikov int 1429a73d728dSAlexander V. Chernikov ipfw_switch_tables_namespace(struct ip_fw_chain *ch, unsigned int sets) 1430a73d728dSAlexander V. Chernikov { 1431a73d728dSAlexander V. Chernikov struct namedobj_instance *ni; 1432a73d728dSAlexander V. Chernikov struct named_object *no; 1433a73d728dSAlexander V. Chernikov struct ip_fw *rule; 1434a73d728dSAlexander V. Chernikov ipfw_insn *cmd; 1435a73d728dSAlexander V. Chernikov int cmdlen, i, l; 1436a73d728dSAlexander V. Chernikov uint16_t kidx; 1437a73d728dSAlexander V. Chernikov uint8_t type; 1438a73d728dSAlexander V. Chernikov 1439a73d728dSAlexander V. Chernikov IPFW_UH_WLOCK(ch); 1440a73d728dSAlexander V. Chernikov 1441a73d728dSAlexander V. Chernikov if (V_fw_tables_sets == sets) { 1442a73d728dSAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 1443a73d728dSAlexander V. Chernikov return (0); 1444a73d728dSAlexander V. Chernikov } 1445a73d728dSAlexander V. Chernikov 1446a73d728dSAlexander V. Chernikov ni = CHAIN_TO_NI(ch); 1447a73d728dSAlexander V. Chernikov 144835e1bbd0SAlexander V. Chernikov /* 144935e1bbd0SAlexander V. Chernikov * Scan all rules and examine tables opcodes. 145035e1bbd0SAlexander V. Chernikov */ 1451a73d728dSAlexander V. Chernikov for (i = 0; i < ch->n_rules; i++) { 1452a73d728dSAlexander V. Chernikov rule = ch->map[i]; 1453a73d728dSAlexander V. Chernikov 1454a73d728dSAlexander V. Chernikov l = rule->cmd_len; 1455a73d728dSAlexander V. Chernikov cmd = rule->cmd; 1456a73d728dSAlexander V. Chernikov cmdlen = 0; 1457a73d728dSAlexander V. Chernikov for ( ; l > 0 ; l -= cmdlen, cmd += cmdlen) { 1458a73d728dSAlexander V. Chernikov cmdlen = F_LEN(cmd); 1459a73d728dSAlexander V. Chernikov 1460a73d728dSAlexander V. Chernikov if (classify_table_opcode(cmd, &kidx, &type) != 0) 1461a73d728dSAlexander V. Chernikov continue; 1462a73d728dSAlexander V. Chernikov 1463a73d728dSAlexander V. Chernikov no = ipfw_objhash_lookup_kidx(ni, kidx); 1464a73d728dSAlexander V. Chernikov 146535e1bbd0SAlexander V. Chernikov /* Check if both table object and rule has the set 0 */ 1466a73d728dSAlexander V. Chernikov if (no->set != 0 || rule->set != 0) { 1467a73d728dSAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 1468a73d728dSAlexander V. Chernikov return (EBUSY); 1469a73d728dSAlexander V. Chernikov } 1470a73d728dSAlexander V. Chernikov 1471a73d728dSAlexander V. Chernikov } 1472a73d728dSAlexander V. Chernikov } 1473a73d728dSAlexander V. Chernikov V_fw_tables_sets = sets; 1474a73d728dSAlexander V. Chernikov 1475a73d728dSAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 1476a73d728dSAlexander V. Chernikov 1477a73d728dSAlexander V. Chernikov return (0); 1478a73d728dSAlexander V. Chernikov } 1479a73d728dSAlexander V. Chernikov 1480c8d5d308SAlexander V. Chernikov /* 1481c8d5d308SAlexander V. Chernikov * Lookup an IP @addr in table @tbl. 1482c8d5d308SAlexander V. Chernikov * Stores found value in @val. 1483c8d5d308SAlexander V. Chernikov * 1484c8d5d308SAlexander V. Chernikov * Returns 1 if @addr was found. 1485c8d5d308SAlexander V. Chernikov */ 14863b3a8eb9SGleb Smirnoff int 14873b3a8eb9SGleb Smirnoff ipfw_lookup_table(struct ip_fw_chain *ch, uint16_t tbl, in_addr_t addr, 14883b3a8eb9SGleb Smirnoff uint32_t *val) 14893b3a8eb9SGleb Smirnoff { 14909f7d47b0SAlexander V. Chernikov struct table_info *ti; 14913b3a8eb9SGleb Smirnoff 1492c8d5d308SAlexander V. Chernikov ti = KIDX_TO_TI(ch, tbl); 14939f7d47b0SAlexander V. Chernikov 14949f7d47b0SAlexander V. Chernikov return (ti->lookup(ti, &addr, sizeof(in_addr_t), val)); 14953b3a8eb9SGleb Smirnoff } 14969f7d47b0SAlexander V. Chernikov 1497c8d5d308SAlexander V. Chernikov /* 1498c8d5d308SAlexander V. Chernikov * Lookup an arbtrary key @paddr of legth @plen in table @tbl. 1499c8d5d308SAlexander V. Chernikov * Stores found value in @val. 1500c8d5d308SAlexander V. Chernikov * 1501c8d5d308SAlexander V. Chernikov * Returns 1 if key was found. 1502c8d5d308SAlexander V. Chernikov */ 15039f7d47b0SAlexander V. Chernikov int 15049f7d47b0SAlexander V. Chernikov ipfw_lookup_table_extended(struct ip_fw_chain *ch, uint16_t tbl, uint16_t plen, 15059f7d47b0SAlexander V. Chernikov void *paddr, uint32_t *val) 15069f7d47b0SAlexander V. Chernikov { 15079f7d47b0SAlexander V. Chernikov struct table_info *ti; 15089f7d47b0SAlexander V. Chernikov 1509c8d5d308SAlexander V. Chernikov ti = KIDX_TO_TI(ch, tbl); 15109f7d47b0SAlexander V. Chernikov 15119f7d47b0SAlexander V. Chernikov return (ti->lookup(ti, paddr, plen, val)); 15129f7d47b0SAlexander V. Chernikov } 15139f7d47b0SAlexander V. Chernikov 15149f7d47b0SAlexander V. Chernikov /* 15159f7d47b0SAlexander V. Chernikov * Info/List/dump support for tables. 15169f7d47b0SAlexander V. Chernikov * 15179f7d47b0SAlexander V. Chernikov */ 15189f7d47b0SAlexander V. Chernikov 1519f1220db8SAlexander V. Chernikov /* 1520d3a4f924SAlexander V. Chernikov * High-level 'get' cmds sysctl handlers 1521d3a4f924SAlexander V. Chernikov */ 1522d3a4f924SAlexander V. Chernikov 1523d3a4f924SAlexander V. Chernikov /* 1524d3a4f924SAlexander V. Chernikov * Lists all tables currently available in kernel. 1525ac35ff17SAlexander V. Chernikov * Data layout (v0)(current): 1526d3a4f924SAlexander V. Chernikov * Request: [ ipfw_obj_lheader ], size = ipfw_obj_lheader.size 1527d3a4f924SAlexander V. Chernikov * Reply: [ ipfw_obj_lheader ipfw_xtable_info x N ] 1528d3a4f924SAlexander V. Chernikov * 1529d3a4f924SAlexander V. Chernikov * Returns 0 on success 1530d3a4f924SAlexander V. Chernikov */ 1531f1220db8SAlexander V. Chernikov int 15322d99a349SAlexander V. Chernikov ipfw_list_tables(struct ip_fw_chain *ch, struct sockopt_data *sd) 1533f1220db8SAlexander V. Chernikov { 1534f1220db8SAlexander V. Chernikov struct _ipfw_obj_lheader *olh; 1535f1220db8SAlexander V. Chernikov int error; 1536f1220db8SAlexander V. Chernikov 15372d99a349SAlexander V. Chernikov olh = (struct _ipfw_obj_lheader *)ipfw_get_sopt_header(sd,sizeof(*olh)); 15382d99a349SAlexander V. Chernikov if (olh == NULL) 1539d3a4f924SAlexander V. Chernikov return (EINVAL); 154068394ec8SAlexander V. Chernikov if (sd->valsize < olh->size) 154168394ec8SAlexander V. Chernikov return (EINVAL); 1542d3a4f924SAlexander V. Chernikov 1543f1220db8SAlexander V. Chernikov IPFW_UH_RLOCK(ch); 15442d99a349SAlexander V. Chernikov error = export_tables(ch, olh, sd); 1545f1220db8SAlexander V. Chernikov IPFW_UH_RUNLOCK(ch); 1546f1220db8SAlexander V. Chernikov 1547f1220db8SAlexander V. Chernikov return (error); 1548f1220db8SAlexander V. Chernikov } 1549f1220db8SAlexander V. Chernikov 1550f1220db8SAlexander V. Chernikov /* 15512d99a349SAlexander V. Chernikov * Store table info to buffer provided by @sd. 1552ac35ff17SAlexander V. Chernikov * Data layout (v0)(current): 1553d3a4f924SAlexander V. Chernikov * Request: [ ipfw_obj_header ipfw_xtable_info(empty)] 1554d3a4f924SAlexander V. Chernikov * Reply: [ ipfw_obj_header ipfw_xtable_info ] 1555d3a4f924SAlexander V. Chernikov * 1556d3a4f924SAlexander V. Chernikov * Returns 0 on success. 1557d3a4f924SAlexander V. Chernikov */ 1558d3a4f924SAlexander V. Chernikov int 15592d99a349SAlexander V. Chernikov ipfw_describe_table(struct ip_fw_chain *ch, struct sockopt_data *sd) 1560d3a4f924SAlexander V. Chernikov { 1561d3a4f924SAlexander V. Chernikov struct _ipfw_obj_header *oh; 1562d3a4f924SAlexander V. Chernikov struct table_config *tc; 1563d3a4f924SAlexander V. Chernikov struct tid_info ti; 1564d3a4f924SAlexander V. Chernikov size_t sz; 1565d3a4f924SAlexander V. Chernikov 1566d3a4f924SAlexander V. Chernikov sz = sizeof(*oh) + sizeof(ipfw_xtable_info); 15672d99a349SAlexander V. Chernikov oh = (struct _ipfw_obj_header *)ipfw_get_sopt_header(sd, sz); 15682d99a349SAlexander V. Chernikov if (oh == NULL) 1569d3a4f924SAlexander V. Chernikov return (EINVAL); 1570d3a4f924SAlexander V. Chernikov 1571d3a4f924SAlexander V. Chernikov objheader_to_ti(oh, &ti); 1572d3a4f924SAlexander V. Chernikov 1573d3a4f924SAlexander V. Chernikov IPFW_UH_RLOCK(ch); 1574d3a4f924SAlexander V. Chernikov if ((tc = find_table(CHAIN_TO_NI(ch), &ti)) == NULL) { 1575d3a4f924SAlexander V. Chernikov IPFW_UH_RUNLOCK(ch); 1576d3a4f924SAlexander V. Chernikov return (ESRCH); 1577d3a4f924SAlexander V. Chernikov } 1578d3a4f924SAlexander V. Chernikov 1579ac35ff17SAlexander V. Chernikov export_table_info(ch, tc, (ipfw_xtable_info *)(oh + 1)); 1580d3a4f924SAlexander V. Chernikov IPFW_UH_RUNLOCK(ch); 1581d3a4f924SAlexander V. Chernikov 15822d99a349SAlexander V. Chernikov return (0); 1583d3a4f924SAlexander V. Chernikov } 1584d3a4f924SAlexander V. Chernikov 1585d3a4f924SAlexander V. Chernikov /* 1586adf3b2b9SAlexander V. Chernikov * Modifies existing table. 1587adf3b2b9SAlexander V. Chernikov * Data layout (v0)(current): 1588adf3b2b9SAlexander V. Chernikov * Request: [ ipfw_obj_header ipfw_xtable_info ] 1589adf3b2b9SAlexander V. Chernikov * 1590adf3b2b9SAlexander V. Chernikov * Returns 0 on success 1591adf3b2b9SAlexander V. Chernikov */ 1592adf3b2b9SAlexander V. Chernikov int 1593adf3b2b9SAlexander V. Chernikov ipfw_modify_table(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 1594adf3b2b9SAlexander V. Chernikov struct sockopt_data *sd) 1595adf3b2b9SAlexander V. Chernikov { 1596adf3b2b9SAlexander V. Chernikov struct _ipfw_obj_header *oh; 1597adf3b2b9SAlexander V. Chernikov ipfw_xtable_info *i; 1598adf3b2b9SAlexander V. Chernikov char *tname; 1599adf3b2b9SAlexander V. Chernikov struct tid_info ti; 1600adf3b2b9SAlexander V. Chernikov struct namedobj_instance *ni; 1601adf3b2b9SAlexander V. Chernikov struct table_config *tc; 1602adf3b2b9SAlexander V. Chernikov 1603adf3b2b9SAlexander V. Chernikov if (sd->valsize != sizeof(*oh) + sizeof(ipfw_xtable_info)) 1604adf3b2b9SAlexander V. Chernikov return (EINVAL); 1605adf3b2b9SAlexander V. Chernikov 1606adf3b2b9SAlexander V. Chernikov oh = (struct _ipfw_obj_header *)sd->kbuf; 1607adf3b2b9SAlexander V. Chernikov i = (ipfw_xtable_info *)(oh + 1); 1608adf3b2b9SAlexander V. Chernikov 1609adf3b2b9SAlexander V. Chernikov /* 1610adf3b2b9SAlexander V. Chernikov * Verify user-supplied strings. 1611adf3b2b9SAlexander V. Chernikov * Check for null-terminated/zero-length strings/ 1612adf3b2b9SAlexander V. Chernikov */ 1613adf3b2b9SAlexander V. Chernikov tname = oh->ntlv.name; 1614adf3b2b9SAlexander V. Chernikov if (ipfw_check_table_name(tname) != 0) 1615adf3b2b9SAlexander V. Chernikov return (EINVAL); 1616adf3b2b9SAlexander V. Chernikov 1617adf3b2b9SAlexander V. Chernikov objheader_to_ti(oh, &ti); 1618adf3b2b9SAlexander V. Chernikov ti.type = i->type; 1619adf3b2b9SAlexander V. Chernikov 1620adf3b2b9SAlexander V. Chernikov IPFW_UH_WLOCK(ch); 1621adf3b2b9SAlexander V. Chernikov ni = CHAIN_TO_NI(ch); 1622adf3b2b9SAlexander V. Chernikov if ((tc = find_table(ni, &ti)) == NULL) { 1623adf3b2b9SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 1624adf3b2b9SAlexander V. Chernikov return (ESRCH); 1625adf3b2b9SAlexander V. Chernikov } 1626adf3b2b9SAlexander V. Chernikov if ((i->mflags & IPFW_TMFLAGS_FTYPE) != 0) 1627adf3b2b9SAlexander V. Chernikov tc->vftype = i->vftype; 1628adf3b2b9SAlexander V. Chernikov if ((i->mflags & IPFW_TMFLAGS_LIMIT) != 0) 1629adf3b2b9SAlexander V. Chernikov tc->limit = i->limit; 16304f43138aSAlexander V. Chernikov if ((i->mflags & IPFW_TMFLAGS_LOCK) != 0) 16314f43138aSAlexander V. Chernikov tc->locked = ((i->flags & IPFW_TGFLAGS_LOCKED) != 0); 1632adf3b2b9SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 1633adf3b2b9SAlexander V. Chernikov 1634adf3b2b9SAlexander V. Chernikov return (0); 1635adf3b2b9SAlexander V. Chernikov } 1636adf3b2b9SAlexander V. Chernikov 1637adf3b2b9SAlexander V. Chernikov /* 16389490a627SAlexander V. Chernikov * Creates new table. 1639ac35ff17SAlexander V. Chernikov * Data layout (v0)(current): 16409490a627SAlexander V. Chernikov * Request: [ ipfw_obj_header ipfw_xtable_info ] 16419490a627SAlexander V. Chernikov * 16429490a627SAlexander V. Chernikov * Returns 0 on success 16439490a627SAlexander V. Chernikov */ 16449490a627SAlexander V. Chernikov int 1645ac35ff17SAlexander V. Chernikov ipfw_create_table(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 1646ac35ff17SAlexander V. Chernikov struct sockopt_data *sd) 16479490a627SAlexander V. Chernikov { 16489490a627SAlexander V. Chernikov struct _ipfw_obj_header *oh; 16499490a627SAlexander V. Chernikov ipfw_xtable_info *i; 16509490a627SAlexander V. Chernikov char *tname, *aname; 16519490a627SAlexander V. Chernikov struct tid_info ti; 16529490a627SAlexander V. Chernikov struct namedobj_instance *ni; 16539490a627SAlexander V. Chernikov struct table_config *tc; 16549490a627SAlexander V. Chernikov 1655ac35ff17SAlexander V. Chernikov if (sd->valsize != sizeof(*oh) + sizeof(ipfw_xtable_info)) 16569490a627SAlexander V. Chernikov return (EINVAL); 16579490a627SAlexander V. Chernikov 1658ac35ff17SAlexander V. Chernikov oh = (struct _ipfw_obj_header *)sd->kbuf; 16599490a627SAlexander V. Chernikov i = (ipfw_xtable_info *)(oh + 1); 16609490a627SAlexander V. Chernikov 16619490a627SAlexander V. Chernikov /* 16629490a627SAlexander V. Chernikov * Verify user-supplied strings. 16632d99a349SAlexander V. Chernikov * Check for null-terminated/zero-length strings/ 16649490a627SAlexander V. Chernikov */ 1665ac35ff17SAlexander V. Chernikov tname = oh->ntlv.name; 16669490a627SAlexander V. Chernikov aname = i->algoname; 1667ac35ff17SAlexander V. Chernikov if (ipfw_check_table_name(tname) != 0 || 16689490a627SAlexander V. Chernikov strnlen(aname, sizeof(i->algoname)) == sizeof(i->algoname)) 16699490a627SAlexander V. Chernikov return (EINVAL); 16709490a627SAlexander V. Chernikov 16719490a627SAlexander V. Chernikov if (aname[0] == '\0') { 16729490a627SAlexander V. Chernikov /* Use default algorithm */ 16739490a627SAlexander V. Chernikov aname = NULL; 16749490a627SAlexander V. Chernikov } 16759490a627SAlexander V. Chernikov 16769490a627SAlexander V. Chernikov objheader_to_ti(oh, &ti); 1677ac35ff17SAlexander V. Chernikov ti.type = i->type; 16789490a627SAlexander V. Chernikov 16799490a627SAlexander V. Chernikov ni = CHAIN_TO_NI(ch); 16809490a627SAlexander V. Chernikov 16819490a627SAlexander V. Chernikov IPFW_UH_RLOCK(ch); 16829490a627SAlexander V. Chernikov if ((tc = find_table(ni, &ti)) != NULL) { 16839490a627SAlexander V. Chernikov IPFW_UH_RUNLOCK(ch); 16849490a627SAlexander V. Chernikov return (EEXIST); 16859490a627SAlexander V. Chernikov } 16869490a627SAlexander V. Chernikov IPFW_UH_RUNLOCK(ch); 16879490a627SAlexander V. Chernikov 16880468c5baSAlexander V. Chernikov return (create_table_internal(ch, &ti, aname, i, NULL, NULL, NULL, 0)); 1689db785d31SAlexander V. Chernikov } 1690db785d31SAlexander V. Chernikov 1691db785d31SAlexander V. Chernikov /* 1692db785d31SAlexander V. Chernikov * Creates new table based on @ti and @aname. 1693db785d31SAlexander V. Chernikov * 1694db785d31SAlexander V. Chernikov * Relies on table name checking inside find_name_tlv() 1695db785d31SAlexander V. Chernikov * Assume @aname to be checked and valid. 16960468c5baSAlexander V. Chernikov * Stores allocated table config, used algo and kidx 16970468c5baSAlexander V. Chernikov * inside @ptc, @pta and @pkidx (if non-NULL). 16980468c5baSAlexander V. Chernikov * Reference created table if @compat is non-zero. 1699db785d31SAlexander V. Chernikov * 1700db785d31SAlexander V. Chernikov * Returns 0 on success. 1701db785d31SAlexander V. Chernikov */ 1702db785d31SAlexander V. Chernikov static int 1703db785d31SAlexander V. Chernikov create_table_internal(struct ip_fw_chain *ch, struct tid_info *ti, 17040468c5baSAlexander V. Chernikov char *aname, ipfw_xtable_info *i, struct table_config **ptc, 17050468c5baSAlexander V. Chernikov struct table_algo **pta, uint16_t *pkidx, int compat) 1706db785d31SAlexander V. Chernikov { 1707db785d31SAlexander V. Chernikov struct namedobj_instance *ni; 1708c8d5d308SAlexander V. Chernikov struct table_config *tc, *tc_new, *tmp; 1709db785d31SAlexander V. Chernikov struct table_algo *ta; 1710db785d31SAlexander V. Chernikov uint16_t kidx; 1711db785d31SAlexander V. Chernikov 1712db785d31SAlexander V. Chernikov ni = CHAIN_TO_NI(ch); 1713db785d31SAlexander V. Chernikov 1714db785d31SAlexander V. Chernikov ta = find_table_algo(CHAIN_TO_TCFG(ch), ti, aname); 17159490a627SAlexander V. Chernikov if (ta == NULL) 17169490a627SAlexander V. Chernikov return (ENOTSUP); 17179490a627SAlexander V. Chernikov 17184c0c07a5SAlexander V. Chernikov tc = alloc_table_config(ch, ti, ta, aname, i->tflags, i->vtype); 17194c0c07a5SAlexander V. Chernikov if (tc == NULL) 17209490a627SAlexander V. Chernikov return (ENOMEM); 17219490a627SAlexander V. Chernikov 1722adf3b2b9SAlexander V. Chernikov tc->vftype = i->vftype; 17234c0c07a5SAlexander V. Chernikov tc->limit = i->limit; 17244f43138aSAlexander V. Chernikov tc->locked = (i->flags & IPFW_TGFLAGS_LOCKED) != 0; 17254c0c07a5SAlexander V. Chernikov 17269490a627SAlexander V. Chernikov IPFW_UH_WLOCK(ch); 1727db785d31SAlexander V. Chernikov 1728db785d31SAlexander V. Chernikov /* Check if table has been already created */ 17290468c5baSAlexander V. Chernikov tc_new = find_table(ni, ti); 17300468c5baSAlexander V. Chernikov if (tc_new != NULL) { 17310468c5baSAlexander V. Chernikov 17320468c5baSAlexander V. Chernikov /* 17330468c5baSAlexander V. Chernikov * Compat: do not fail if we're 17340468c5baSAlexander V. Chernikov * requesting to create existing table 17350468c5baSAlexander V. Chernikov * which has the same type / vtype 17360468c5baSAlexander V. Chernikov */ 17370468c5baSAlexander V. Chernikov if (compat == 0 || tc_new->no.type != tc->no.type || 17380468c5baSAlexander V. Chernikov tc_new->vtype != tc->vtype) { 1739db785d31SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 1740db785d31SAlexander V. Chernikov free_table_config(ni, tc); 1741db785d31SAlexander V. Chernikov return (EEXIST); 1742db785d31SAlexander V. Chernikov } 1743db785d31SAlexander V. Chernikov 17440468c5baSAlexander V. Chernikov /* Exchange tc and tc_new for proper refcounting & freeing */ 17450468c5baSAlexander V. Chernikov tmp = tc; 17460468c5baSAlexander V. Chernikov tc = tc_new; 17470468c5baSAlexander V. Chernikov tc_new = tmp; 17480468c5baSAlexander V. Chernikov } else { 17490468c5baSAlexander V. Chernikov /* New table */ 1750ac35ff17SAlexander V. Chernikov if (ipfw_objhash_alloc_idx(ni, &kidx) != 0) { 17519490a627SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 1752db785d31SAlexander V. Chernikov printf("Unable to allocate table index." 1753db785d31SAlexander V. Chernikov " Consider increasing net.inet.ip.fw.tables_max"); 17549490a627SAlexander V. Chernikov free_table_config(ni, tc); 17559490a627SAlexander V. Chernikov return (EBUSY); 17569490a627SAlexander V. Chernikov } 17579490a627SAlexander V. Chernikov tc->no.kidx = kidx; 17589490a627SAlexander V. Chernikov 17599490a627SAlexander V. Chernikov IPFW_WLOCK(ch); 17609490a627SAlexander V. Chernikov link_table(ch, tc); 17619490a627SAlexander V. Chernikov IPFW_WUNLOCK(ch); 17620468c5baSAlexander V. Chernikov } 17630468c5baSAlexander V. Chernikov 17640468c5baSAlexander V. Chernikov if (compat != 0) 17650468c5baSAlexander V. Chernikov tc->no.refcnt++; 17660468c5baSAlexander V. Chernikov if (ptc != NULL) 17670468c5baSAlexander V. Chernikov *ptc = tc; 17680468c5baSAlexander V. Chernikov if (pta != NULL) 17690468c5baSAlexander V. Chernikov *pta = ta; 17700468c5baSAlexander V. Chernikov if (pkidx != NULL) 17710468c5baSAlexander V. Chernikov *pkidx = tc->no.kidx; 17729490a627SAlexander V. Chernikov 17739490a627SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 17749490a627SAlexander V. Chernikov 17750468c5baSAlexander V. Chernikov if (tc_new != NULL) 17760468c5baSAlexander V. Chernikov free_table_config(ni, tc_new); 17770468c5baSAlexander V. Chernikov 17789490a627SAlexander V. Chernikov return (0); 17799490a627SAlexander V. Chernikov } 17809490a627SAlexander V. Chernikov 178146d52008SAlexander V. Chernikov static void 178246d52008SAlexander V. Chernikov ntlv_to_ti(ipfw_obj_ntlv *ntlv, struct tid_info *ti) 1783d3a4f924SAlexander V. Chernikov { 1784d3a4f924SAlexander V. Chernikov 1785d3a4f924SAlexander V. Chernikov memset(ti, 0, sizeof(struct tid_info)); 178646d52008SAlexander V. Chernikov ti->set = ntlv->set; 178746d52008SAlexander V. Chernikov ti->uidx = ntlv->idx; 178846d52008SAlexander V. Chernikov ti->tlvs = ntlv; 178946d52008SAlexander V. Chernikov ti->tlen = ntlv->head.length; 179046d52008SAlexander V. Chernikov } 179146d52008SAlexander V. Chernikov 179246d52008SAlexander V. Chernikov static void 179346d52008SAlexander V. Chernikov objheader_to_ti(struct _ipfw_obj_header *oh, struct tid_info *ti) 179446d52008SAlexander V. Chernikov { 179546d52008SAlexander V. Chernikov 179646d52008SAlexander V. Chernikov ntlv_to_ti(&oh->ntlv, ti); 1797d3a4f924SAlexander V. Chernikov } 1798d3a4f924SAlexander V. Chernikov 179935e1bbd0SAlexander V. Chernikov /* 180035e1bbd0SAlexander V. Chernikov * Exports basic table info as name TLV. 180135e1bbd0SAlexander V. Chernikov * Used inside dump_static_rules() to provide info 180235e1bbd0SAlexander V. Chernikov * about all tables referenced by current ruleset. 180335e1bbd0SAlexander V. Chernikov * 180435e1bbd0SAlexander V. Chernikov * Returns 0 on success. 180535e1bbd0SAlexander V. Chernikov */ 1806563b5ab1SAlexander V. Chernikov int 1807563b5ab1SAlexander V. Chernikov ipfw_export_table_ntlv(struct ip_fw_chain *ch, uint16_t kidx, 1808563b5ab1SAlexander V. Chernikov struct sockopt_data *sd) 1809563b5ab1SAlexander V. Chernikov { 1810563b5ab1SAlexander V. Chernikov struct namedobj_instance *ni; 1811563b5ab1SAlexander V. Chernikov struct named_object *no; 1812563b5ab1SAlexander V. Chernikov ipfw_obj_ntlv *ntlv; 1813563b5ab1SAlexander V. Chernikov 1814563b5ab1SAlexander V. Chernikov ni = CHAIN_TO_NI(ch); 1815563b5ab1SAlexander V. Chernikov 1816ac35ff17SAlexander V. Chernikov no = ipfw_objhash_lookup_kidx(ni, kidx); 1817563b5ab1SAlexander V. Chernikov KASSERT(no != NULL, ("invalid table kidx passed")); 1818563b5ab1SAlexander V. Chernikov 1819563b5ab1SAlexander V. Chernikov ntlv = (ipfw_obj_ntlv *)ipfw_get_sopt_space(sd, sizeof(*ntlv)); 1820563b5ab1SAlexander V. Chernikov if (ntlv == NULL) 1821563b5ab1SAlexander V. Chernikov return (ENOMEM); 1822563b5ab1SAlexander V. Chernikov 1823563b5ab1SAlexander V. Chernikov ntlv->head.type = IPFW_TLV_TBL_NAME; 1824563b5ab1SAlexander V. Chernikov ntlv->head.length = sizeof(*ntlv); 1825563b5ab1SAlexander V. Chernikov ntlv->idx = no->kidx; 1826563b5ab1SAlexander V. Chernikov strlcpy(ntlv->name, no->name, sizeof(ntlv->name)); 1827563b5ab1SAlexander V. Chernikov 1828563b5ab1SAlexander V. Chernikov return (0); 1829563b5ab1SAlexander V. Chernikov } 1830563b5ab1SAlexander V. Chernikov 183135e1bbd0SAlexander V. Chernikov /* 1832f99fbf96SAlexander V. Chernikov * Marks every table kidx used in @rule with bit in @bmask. 1833f99fbf96SAlexander V. Chernikov * Used to generate bitmask of referenced tables for given ruleset. 1834f99fbf96SAlexander V. Chernikov * 1835f99fbf96SAlexander V. Chernikov * Returns number of newly-referenced tables. 1836f99fbf96SAlexander V. Chernikov */ 1837f99fbf96SAlexander V. Chernikov int 1838f99fbf96SAlexander V. Chernikov ipfw_mark_table_kidx(struct ip_fw_chain *chain, struct ip_fw *rule, 1839f99fbf96SAlexander V. Chernikov uint32_t *bmask) 1840f99fbf96SAlexander V. Chernikov { 1841f99fbf96SAlexander V. Chernikov int cmdlen, l, count; 1842f99fbf96SAlexander V. Chernikov ipfw_insn *cmd; 1843f99fbf96SAlexander V. Chernikov uint16_t kidx; 1844f99fbf96SAlexander V. Chernikov uint8_t type; 1845f99fbf96SAlexander V. Chernikov 1846f99fbf96SAlexander V. Chernikov l = rule->cmd_len; 1847f99fbf96SAlexander V. Chernikov cmd = rule->cmd; 1848f99fbf96SAlexander V. Chernikov cmdlen = 0; 1849f99fbf96SAlexander V. Chernikov count = 0; 1850f99fbf96SAlexander V. Chernikov for ( ; l > 0 ; l -= cmdlen, cmd += cmdlen) { 1851f99fbf96SAlexander V. Chernikov cmdlen = F_LEN(cmd); 1852f99fbf96SAlexander V. Chernikov 1853f99fbf96SAlexander V. Chernikov if (classify_table_opcode(cmd, &kidx, &type) != 0) 1854f99fbf96SAlexander V. Chernikov continue; 1855f99fbf96SAlexander V. Chernikov 1856f99fbf96SAlexander V. Chernikov if ((bmask[kidx / 32] & (1 << (kidx % 32))) == 0) 1857f99fbf96SAlexander V. Chernikov count++; 1858f99fbf96SAlexander V. Chernikov 1859f99fbf96SAlexander V. Chernikov bmask[kidx / 32] |= 1 << (kidx % 32); 1860f99fbf96SAlexander V. Chernikov } 1861f99fbf96SAlexander V. Chernikov 1862f99fbf96SAlexander V. Chernikov return (count); 1863f99fbf96SAlexander V. Chernikov } 1864f99fbf96SAlexander V. Chernikov 1865f99fbf96SAlexander V. Chernikov 1866f99fbf96SAlexander V. Chernikov /* 186735e1bbd0SAlexander V. Chernikov * Exports table @tc info into standard ipfw_xtable_info format. 186835e1bbd0SAlexander V. Chernikov */ 18699f7d47b0SAlexander V. Chernikov static void 1870ac35ff17SAlexander V. Chernikov export_table_info(struct ip_fw_chain *ch, struct table_config *tc, 1871ac35ff17SAlexander V. Chernikov ipfw_xtable_info *i) 18729f7d47b0SAlexander V. Chernikov { 1873ac35ff17SAlexander V. Chernikov struct table_info *ti; 18745f379342SAlexander V. Chernikov struct table_algo *ta; 18759f7d47b0SAlexander V. Chernikov 18769f7d47b0SAlexander V. Chernikov i->type = tc->no.type; 1877914bffb6SAlexander V. Chernikov i->tflags = tc->tflags; 1878ac35ff17SAlexander V. Chernikov i->vtype = tc->vtype; 1879adf3b2b9SAlexander V. Chernikov i->vftype = tc->vftype; 18809f7d47b0SAlexander V. Chernikov i->set = tc->no.set; 18819f7d47b0SAlexander V. Chernikov i->kidx = tc->no.kidx; 18829f7d47b0SAlexander V. Chernikov i->refcnt = tc->no.refcnt; 18839f7d47b0SAlexander V. Chernikov i->count = tc->count; 18844c0c07a5SAlexander V. Chernikov i->limit = tc->limit; 18854f43138aSAlexander V. Chernikov i->flags |= (tc->locked != 0) ? IPFW_TGFLAGS_LOCKED : 0; 188681d3153dSAlexander V. Chernikov i->size = tc->count * sizeof(ipfw_obj_tentry); 1887f1220db8SAlexander V. Chernikov i->size += sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info); 18889f7d47b0SAlexander V. Chernikov strlcpy(i->tablename, tc->tablename, sizeof(i->tablename)); 1889ac35ff17SAlexander V. Chernikov ti = KIDX_TO_TI(ch, tc->no.kidx); 18905f379342SAlexander V. Chernikov ta = tc->ta; 18915f379342SAlexander V. Chernikov if (ta->print_config != NULL) { 18925f379342SAlexander V. Chernikov /* Use algo function to print table config to string */ 18935f379342SAlexander V. Chernikov ta->print_config(tc->astate, ti, i->algoname, 1894ac35ff17SAlexander V. Chernikov sizeof(i->algoname)); 1895ac35ff17SAlexander V. Chernikov } else 18965f379342SAlexander V. Chernikov strlcpy(i->algoname, ta->name, sizeof(i->algoname)); 18975f379342SAlexander V. Chernikov /* Dump algo-specific data, if possible */ 18985f379342SAlexander V. Chernikov if (ta->dump_tinfo != NULL) { 18995f379342SAlexander V. Chernikov ta->dump_tinfo(tc->astate, ti, &i->ta_info); 19005f379342SAlexander V. Chernikov i->ta_info.flags |= IPFW_TATFLAGS_DATA; 19015f379342SAlexander V. Chernikov } 19029f7d47b0SAlexander V. Chernikov } 19039f7d47b0SAlexander V. Chernikov 1904ac35ff17SAlexander V. Chernikov struct dump_table_args { 1905ac35ff17SAlexander V. Chernikov struct ip_fw_chain *ch; 1906ac35ff17SAlexander V. Chernikov struct sockopt_data *sd; 1907ac35ff17SAlexander V. Chernikov }; 1908ac35ff17SAlexander V. Chernikov 19099f7d47b0SAlexander V. Chernikov static void 19109f7d47b0SAlexander V. Chernikov export_table_internal(struct namedobj_instance *ni, struct named_object *no, 19119f7d47b0SAlexander V. Chernikov void *arg) 19123b3a8eb9SGleb Smirnoff { 19139f7d47b0SAlexander V. Chernikov ipfw_xtable_info *i; 1914ac35ff17SAlexander V. Chernikov struct dump_table_args *dta; 19153b3a8eb9SGleb Smirnoff 1916ac35ff17SAlexander V. Chernikov dta = (struct dump_table_args *)arg; 1917ac35ff17SAlexander V. Chernikov 1918ac35ff17SAlexander V. Chernikov i = (ipfw_xtable_info *)ipfw_get_sopt_space(dta->sd, sizeof(*i)); 191968394ec8SAlexander V. Chernikov KASSERT(i != 0, ("previously checked buffer is not enough")); 19209f7d47b0SAlexander V. Chernikov 1921ac35ff17SAlexander V. Chernikov export_table_info(dta->ch, (struct table_config *)no, i); 19229f7d47b0SAlexander V. Chernikov } 19239f7d47b0SAlexander V. Chernikov 1924f1220db8SAlexander V. Chernikov /* 1925f1220db8SAlexander V. Chernikov * Export all tables as ipfw_xtable_info structures to 19262d99a349SAlexander V. Chernikov * storage provided by @sd. 192728ea4fa3SAlexander V. Chernikov * 192828ea4fa3SAlexander V. Chernikov * If supplied buffer is too small, fills in required size 192928ea4fa3SAlexander V. Chernikov * and returns ENOMEM. 1930f1220db8SAlexander V. Chernikov * Returns 0 on success. 1931f1220db8SAlexander V. Chernikov */ 1932f1220db8SAlexander V. Chernikov static int 19332d99a349SAlexander V. Chernikov export_tables(struct ip_fw_chain *ch, ipfw_obj_lheader *olh, 19342d99a349SAlexander V. Chernikov struct sockopt_data *sd) 19359f7d47b0SAlexander V. Chernikov { 19369f7d47b0SAlexander V. Chernikov uint32_t size; 19379f7d47b0SAlexander V. Chernikov uint32_t count; 1938ac35ff17SAlexander V. Chernikov struct dump_table_args dta; 19399f7d47b0SAlexander V. Chernikov 19409f7d47b0SAlexander V. Chernikov count = ipfw_objhash_count(CHAIN_TO_NI(ch)); 19419f7d47b0SAlexander V. Chernikov size = count * sizeof(ipfw_xtable_info) + sizeof(ipfw_obj_lheader); 19422d99a349SAlexander V. Chernikov 19432d99a349SAlexander V. Chernikov /* Fill in header regadless of buffer size */ 1944f1220db8SAlexander V. Chernikov olh->count = count; 1945f1220db8SAlexander V. Chernikov olh->objsize = sizeof(ipfw_xtable_info); 19462d99a349SAlexander V. Chernikov 19472d99a349SAlexander V. Chernikov if (size > olh->size) { 19482d99a349SAlexander V. Chernikov olh->size = size; 19499f7d47b0SAlexander V. Chernikov return (ENOMEM); 1950f1220db8SAlexander V. Chernikov } 195168394ec8SAlexander V. Chernikov 19529f7d47b0SAlexander V. Chernikov olh->size = size; 19532d99a349SAlexander V. Chernikov 1954ac35ff17SAlexander V. Chernikov dta.ch = ch; 1955ac35ff17SAlexander V. Chernikov dta.sd = sd; 1956ac35ff17SAlexander V. Chernikov 1957ac35ff17SAlexander V. Chernikov ipfw_objhash_foreach(CHAIN_TO_NI(ch), export_table_internal, &dta); 19589f7d47b0SAlexander V. Chernikov 19593b3a8eb9SGleb Smirnoff return (0); 19603b3a8eb9SGleb Smirnoff } 19613b3a8eb9SGleb Smirnoff 1962f99fbf96SAlexander V. Chernikov struct dump_args { 1963f99fbf96SAlexander V. Chernikov struct table_info *ti; 1964f99fbf96SAlexander V. Chernikov struct table_config *tc; 1965f99fbf96SAlexander V. Chernikov struct sockopt_data *sd; 1966f99fbf96SAlexander V. Chernikov uint32_t cnt; 1967f99fbf96SAlexander V. Chernikov uint16_t uidx; 1968f99fbf96SAlexander V. Chernikov int error; 1969f99fbf96SAlexander V. Chernikov ipfw_table_entry *ent; 1970f99fbf96SAlexander V. Chernikov uint32_t size; 1971f99fbf96SAlexander V. Chernikov ipfw_obj_tentry tent; 1972f99fbf96SAlexander V. Chernikov }; 1973f99fbf96SAlexander V. Chernikov 1974f99fbf96SAlexander V. Chernikov int 1975f99fbf96SAlexander V. Chernikov ipfw_dump_table(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 1976f99fbf96SAlexander V. Chernikov struct sockopt_data *sd) 1977f99fbf96SAlexander V. Chernikov { 1978f99fbf96SAlexander V. Chernikov int error; 1979f99fbf96SAlexander V. Chernikov 1980f99fbf96SAlexander V. Chernikov switch (op3->version) { 1981f99fbf96SAlexander V. Chernikov case 0: 1982f99fbf96SAlexander V. Chernikov error = ipfw_dump_table_v0(ch, sd); 1983f99fbf96SAlexander V. Chernikov break; 1984f99fbf96SAlexander V. Chernikov case 1: 1985f99fbf96SAlexander V. Chernikov error = ipfw_dump_table_v1(ch, sd); 1986f99fbf96SAlexander V. Chernikov break; 1987f99fbf96SAlexander V. Chernikov default: 1988f99fbf96SAlexander V. Chernikov error = ENOTSUP; 1989f99fbf96SAlexander V. Chernikov } 1990f99fbf96SAlexander V. Chernikov 1991f99fbf96SAlexander V. Chernikov return (error); 1992f99fbf96SAlexander V. Chernikov } 1993f99fbf96SAlexander V. Chernikov 1994f99fbf96SAlexander V. Chernikov /* 1995f99fbf96SAlexander V. Chernikov * Dumps all table data 1996f99fbf96SAlexander V. Chernikov * Data layout (v1)(current): 1997f99fbf96SAlexander V. Chernikov * Request: [ ipfw_obj_header ], size = ipfw_xtable_info.size 1998f99fbf96SAlexander V. Chernikov * Reply: [ ipfw_obj_header ipfw_xtable_info ipfw_obj_tentry x N ] 1999f99fbf96SAlexander V. Chernikov * 2000f99fbf96SAlexander V. Chernikov * Returns 0 on success 2001f99fbf96SAlexander V. Chernikov */ 2002f99fbf96SAlexander V. Chernikov static int 2003f99fbf96SAlexander V. Chernikov ipfw_dump_table_v1(struct ip_fw_chain *ch, struct sockopt_data *sd) 2004f99fbf96SAlexander V. Chernikov { 2005f99fbf96SAlexander V. Chernikov struct _ipfw_obj_header *oh; 2006f99fbf96SAlexander V. Chernikov ipfw_xtable_info *i; 2007f99fbf96SAlexander V. Chernikov struct tid_info ti; 2008f99fbf96SAlexander V. Chernikov struct table_config *tc; 2009f99fbf96SAlexander V. Chernikov struct table_algo *ta; 2010f99fbf96SAlexander V. Chernikov struct dump_args da; 2011f99fbf96SAlexander V. Chernikov uint32_t sz; 2012f99fbf96SAlexander V. Chernikov 2013f99fbf96SAlexander V. Chernikov sz = sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info); 2014f99fbf96SAlexander V. Chernikov oh = (struct _ipfw_obj_header *)ipfw_get_sopt_header(sd, sz); 2015f99fbf96SAlexander V. Chernikov if (oh == NULL) 2016f99fbf96SAlexander V. Chernikov return (EINVAL); 2017f99fbf96SAlexander V. Chernikov 2018f99fbf96SAlexander V. Chernikov i = (ipfw_xtable_info *)(oh + 1); 2019f99fbf96SAlexander V. Chernikov objheader_to_ti(oh, &ti); 2020f99fbf96SAlexander V. Chernikov 2021f99fbf96SAlexander V. Chernikov IPFW_UH_RLOCK(ch); 2022f99fbf96SAlexander V. Chernikov if ((tc = find_table(CHAIN_TO_NI(ch), &ti)) == NULL) { 2023f99fbf96SAlexander V. Chernikov IPFW_UH_RUNLOCK(ch); 2024f99fbf96SAlexander V. Chernikov return (ESRCH); 2025f99fbf96SAlexander V. Chernikov } 2026f99fbf96SAlexander V. Chernikov export_table_info(ch, tc, i); 2027f99fbf96SAlexander V. Chernikov 2028f99fbf96SAlexander V. Chernikov if (sd->valsize < i->size) { 2029f99fbf96SAlexander V. Chernikov 2030f99fbf96SAlexander V. Chernikov /* 2031f99fbf96SAlexander V. Chernikov * Submitted buffer size is not enough. 2032f99fbf96SAlexander V. Chernikov * WE've already filled in @i structure with 2033f99fbf96SAlexander V. Chernikov * relevant table info including size, so we 2034f99fbf96SAlexander V. Chernikov * can return. Buffer will be flushed automatically. 2035f99fbf96SAlexander V. Chernikov */ 2036f99fbf96SAlexander V. Chernikov IPFW_UH_RUNLOCK(ch); 2037f99fbf96SAlexander V. Chernikov return (ENOMEM); 2038f99fbf96SAlexander V. Chernikov } 2039f99fbf96SAlexander V. Chernikov 2040f99fbf96SAlexander V. Chernikov /* 2041f99fbf96SAlexander V. Chernikov * Do the actual dump in eXtended format 2042f99fbf96SAlexander V. Chernikov */ 2043f99fbf96SAlexander V. Chernikov memset(&da, 0, sizeof(da)); 2044f99fbf96SAlexander V. Chernikov da.ti = KIDX_TO_TI(ch, tc->no.kidx); 2045f99fbf96SAlexander V. Chernikov da.tc = tc; 2046f99fbf96SAlexander V. Chernikov da.sd = sd; 2047f99fbf96SAlexander V. Chernikov 2048f99fbf96SAlexander V. Chernikov ta = tc->ta; 2049f99fbf96SAlexander V. Chernikov 2050f99fbf96SAlexander V. Chernikov ta->foreach(tc->astate, da.ti, dump_table_tentry, &da); 2051f99fbf96SAlexander V. Chernikov IPFW_UH_RUNLOCK(ch); 2052f99fbf96SAlexander V. Chernikov 2053f99fbf96SAlexander V. Chernikov return (da.error); 2054f99fbf96SAlexander V. Chernikov } 2055f99fbf96SAlexander V. Chernikov 2056f99fbf96SAlexander V. Chernikov /* 2057f99fbf96SAlexander V. Chernikov * Dumps all table data 2058f99fbf96SAlexander V. Chernikov * Data layout (version 0)(legacy): 2059f99fbf96SAlexander V. Chernikov * Request: [ ipfw_xtable ], size = IP_FW_TABLE_XGETSIZE() 2060f99fbf96SAlexander V. Chernikov * Reply: [ ipfw_xtable ipfw_table_xentry x N ] 2061f99fbf96SAlexander V. Chernikov * 2062f99fbf96SAlexander V. Chernikov * Returns 0 on success 2063f99fbf96SAlexander V. Chernikov */ 2064f99fbf96SAlexander V. Chernikov static int 2065f99fbf96SAlexander V. Chernikov ipfw_dump_table_v0(struct ip_fw_chain *ch, struct sockopt_data *sd) 2066f99fbf96SAlexander V. Chernikov { 2067f99fbf96SAlexander V. Chernikov ipfw_xtable *xtbl; 2068f99fbf96SAlexander V. Chernikov struct tid_info ti; 2069f99fbf96SAlexander V. Chernikov struct table_config *tc; 2070f99fbf96SAlexander V. Chernikov struct table_algo *ta; 2071f99fbf96SAlexander V. Chernikov struct dump_args da; 2072f99fbf96SAlexander V. Chernikov size_t sz; 2073f99fbf96SAlexander V. Chernikov 2074f99fbf96SAlexander V. Chernikov xtbl = (ipfw_xtable *)ipfw_get_sopt_header(sd, sizeof(ipfw_xtable)); 2075f99fbf96SAlexander V. Chernikov if (xtbl == NULL) 2076f99fbf96SAlexander V. Chernikov return (EINVAL); 2077f99fbf96SAlexander V. Chernikov 2078f99fbf96SAlexander V. Chernikov memset(&ti, 0, sizeof(ti)); 2079f99fbf96SAlexander V. Chernikov ti.uidx = xtbl->tbl; 2080f99fbf96SAlexander V. Chernikov 2081f99fbf96SAlexander V. Chernikov IPFW_UH_RLOCK(ch); 2082f99fbf96SAlexander V. Chernikov if ((tc = find_table(CHAIN_TO_NI(ch), &ti)) == NULL) { 2083f99fbf96SAlexander V. Chernikov IPFW_UH_RUNLOCK(ch); 2084f99fbf96SAlexander V. Chernikov return (0); 2085f99fbf96SAlexander V. Chernikov } 2086f99fbf96SAlexander V. Chernikov sz = tc->count * sizeof(ipfw_table_xentry) + sizeof(ipfw_xtable); 2087f99fbf96SAlexander V. Chernikov 2088f99fbf96SAlexander V. Chernikov xtbl->cnt = tc->count; 2089f99fbf96SAlexander V. Chernikov xtbl->size = sz; 2090f99fbf96SAlexander V. Chernikov xtbl->type = tc->no.type; 2091f99fbf96SAlexander V. Chernikov xtbl->tbl = ti.uidx; 2092f99fbf96SAlexander V. Chernikov 2093f99fbf96SAlexander V. Chernikov if (sd->valsize < sz) { 2094f99fbf96SAlexander V. Chernikov 2095f99fbf96SAlexander V. Chernikov /* 2096f99fbf96SAlexander V. Chernikov * Submitted buffer size is not enough. 2097f99fbf96SAlexander V. Chernikov * WE've already filled in @i structure with 2098f99fbf96SAlexander V. Chernikov * relevant table info including size, so we 2099f99fbf96SAlexander V. Chernikov * can return. Buffer will be flushed automatically. 2100f99fbf96SAlexander V. Chernikov */ 2101f99fbf96SAlexander V. Chernikov IPFW_UH_RUNLOCK(ch); 2102f99fbf96SAlexander V. Chernikov return (ENOMEM); 2103f99fbf96SAlexander V. Chernikov } 2104f99fbf96SAlexander V. Chernikov 2105f99fbf96SAlexander V. Chernikov /* Do the actual dump in eXtended format */ 2106f99fbf96SAlexander V. Chernikov memset(&da, 0, sizeof(da)); 2107f99fbf96SAlexander V. Chernikov da.ti = KIDX_TO_TI(ch, tc->no.kidx); 2108f99fbf96SAlexander V. Chernikov da.tc = tc; 2109f99fbf96SAlexander V. Chernikov da.sd = sd; 2110f99fbf96SAlexander V. Chernikov 2111f99fbf96SAlexander V. Chernikov ta = tc->ta; 2112f99fbf96SAlexander V. Chernikov 2113f99fbf96SAlexander V. Chernikov ta->foreach(tc->astate, da.ti, dump_table_xentry, &da); 2114f99fbf96SAlexander V. Chernikov IPFW_UH_RUNLOCK(ch); 2115f99fbf96SAlexander V. Chernikov 2116f99fbf96SAlexander V. Chernikov return (0); 2117f99fbf96SAlexander V. Chernikov } 2118f99fbf96SAlexander V. Chernikov 211981d3153dSAlexander V. Chernikov /* 212081d3153dSAlexander V. Chernikov * Legacy IP_FW_TABLE_GETSIZE handler 212181d3153dSAlexander V. Chernikov */ 21223b3a8eb9SGleb Smirnoff int 2123b074b7bbSAlexander V. Chernikov ipfw_count_table(struct ip_fw_chain *ch, struct tid_info *ti, uint32_t *cnt) 21243b3a8eb9SGleb Smirnoff { 2125b074b7bbSAlexander V. Chernikov struct table_config *tc; 21263b3a8eb9SGleb Smirnoff 2127b074b7bbSAlexander V. Chernikov if ((tc = find_table(CHAIN_TO_NI(ch), ti)) == NULL) 2128b074b7bbSAlexander V. Chernikov return (ESRCH); 21299f7d47b0SAlexander V. Chernikov *cnt = tc->count; 21303b3a8eb9SGleb Smirnoff return (0); 21313b3a8eb9SGleb Smirnoff } 21323b3a8eb9SGleb Smirnoff 213381d3153dSAlexander V. Chernikov /* 213481d3153dSAlexander V. Chernikov * Legacy IP_FW_TABLE_XGETSIZE handler 213581d3153dSAlexander V. Chernikov */ 21369f7d47b0SAlexander V. Chernikov int 21379f7d47b0SAlexander V. Chernikov ipfw_count_xtable(struct ip_fw_chain *ch, struct tid_info *ti, uint32_t *cnt) 21383b3a8eb9SGleb Smirnoff { 21399f7d47b0SAlexander V. Chernikov struct table_config *tc; 21409f7d47b0SAlexander V. Chernikov 2141d3a4f924SAlexander V. Chernikov if ((tc = find_table(CHAIN_TO_NI(ch), ti)) == NULL) { 2142d3a4f924SAlexander V. Chernikov *cnt = 0; 21439f7d47b0SAlexander V. Chernikov return (0); /* 'table all list' requires success */ 2144d3a4f924SAlexander V. Chernikov } 21459f7d47b0SAlexander V. Chernikov *cnt = tc->count * sizeof(ipfw_table_xentry); 21469f7d47b0SAlexander V. Chernikov if (tc->count > 0) 21479f7d47b0SAlexander V. Chernikov *cnt += sizeof(ipfw_xtable); 21489f7d47b0SAlexander V. Chernikov return (0); 21499f7d47b0SAlexander V. Chernikov } 21509f7d47b0SAlexander V. Chernikov 21519f7d47b0SAlexander V. Chernikov static int 21529f7d47b0SAlexander V. Chernikov dump_table_entry(void *e, void *arg) 21539f7d47b0SAlexander V. Chernikov { 21549f7d47b0SAlexander V. Chernikov struct dump_args *da; 21559f7d47b0SAlexander V. Chernikov struct table_config *tc; 21569f7d47b0SAlexander V. Chernikov struct table_algo *ta; 21573b3a8eb9SGleb Smirnoff ipfw_table_entry *ent; 215881d3153dSAlexander V. Chernikov int error; 21593b3a8eb9SGleb Smirnoff 21609f7d47b0SAlexander V. Chernikov da = (struct dump_args *)arg; 21619f7d47b0SAlexander V. Chernikov 21629f7d47b0SAlexander V. Chernikov tc = da->tc; 21639f7d47b0SAlexander V. Chernikov ta = tc->ta; 21649f7d47b0SAlexander V. Chernikov 21659f7d47b0SAlexander V. Chernikov /* Out of memory, returning */ 2166f1220db8SAlexander V. Chernikov if (da->cnt == da->size) 21673b3a8eb9SGleb Smirnoff return (1); 2168f1220db8SAlexander V. Chernikov ent = da->ent++; 2169f1220db8SAlexander V. Chernikov ent->tbl = da->uidx; 2170f1220db8SAlexander V. Chernikov da->cnt++; 21719f7d47b0SAlexander V. Chernikov 217281d3153dSAlexander V. Chernikov error = ta->dump_tentry(tc->astate, da->ti, e, &da->tent); 217381d3153dSAlexander V. Chernikov if (error != 0) 217481d3153dSAlexander V. Chernikov return (error); 217581d3153dSAlexander V. Chernikov 217681d3153dSAlexander V. Chernikov ent->addr = da->tent.k.addr.s_addr; 217781d3153dSAlexander V. Chernikov ent->masklen = da->tent.masklen; 217881d3153dSAlexander V. Chernikov ent->value = da->tent.value; 217981d3153dSAlexander V. Chernikov 218081d3153dSAlexander V. Chernikov return (0); 21813b3a8eb9SGleb Smirnoff } 21823b3a8eb9SGleb Smirnoff 2183f1220db8SAlexander V. Chernikov /* 2184f1220db8SAlexander V. Chernikov * Dumps table in pre-8.1 legacy format. 2185f1220db8SAlexander V. Chernikov */ 21863b3a8eb9SGleb Smirnoff int 2187f1220db8SAlexander V. Chernikov ipfw_dump_table_legacy(struct ip_fw_chain *ch, struct tid_info *ti, 2188f1220db8SAlexander V. Chernikov ipfw_table *tbl) 21893b3a8eb9SGleb Smirnoff { 2190b074b7bbSAlexander V. Chernikov struct table_config *tc; 21919f7d47b0SAlexander V. Chernikov struct table_algo *ta; 21929f7d47b0SAlexander V. Chernikov struct dump_args da; 21933b3a8eb9SGleb Smirnoff 21943b3a8eb9SGleb Smirnoff tbl->cnt = 0; 21953b3a8eb9SGleb Smirnoff 2196b074b7bbSAlexander V. Chernikov if ((tc = find_table(CHAIN_TO_NI(ch), ti)) == NULL) 2197b074b7bbSAlexander V. Chernikov return (0); /* XXX: We should return ESRCH */ 21989f7d47b0SAlexander V. Chernikov 21999f7d47b0SAlexander V. Chernikov ta = tc->ta; 22009f7d47b0SAlexander V. Chernikov 220181d3153dSAlexander V. Chernikov /* This dump format supports IPv4 only */ 220281d3153dSAlexander V. Chernikov if (tc->no.type != IPFW_TABLE_CIDR) 220381d3153dSAlexander V. Chernikov return (0); 22049f7d47b0SAlexander V. Chernikov 2205d3a4f924SAlexander V. Chernikov memset(&da, 0, sizeof(da)); 22069f7d47b0SAlexander V. Chernikov da.ti = KIDX_TO_TI(ch, tc->no.kidx); 22079f7d47b0SAlexander V. Chernikov da.tc = tc; 2208f1220db8SAlexander V. Chernikov da.ent = &tbl->ent[0]; 2209f1220db8SAlexander V. Chernikov da.size = tbl->size; 22109f7d47b0SAlexander V. Chernikov 22119f7d47b0SAlexander V. Chernikov tbl->cnt = 0; 22129f7d47b0SAlexander V. Chernikov ta->foreach(tc->astate, da.ti, dump_table_entry, &da); 2213f1220db8SAlexander V. Chernikov tbl->cnt = da.cnt; 22149f7d47b0SAlexander V. Chernikov 22153b3a8eb9SGleb Smirnoff return (0); 22163b3a8eb9SGleb Smirnoff } 22173b3a8eb9SGleb Smirnoff 22189490a627SAlexander V. Chernikov /* 221981d3153dSAlexander V. Chernikov * Dumps table entry in eXtended format (v1)(current). 222081d3153dSAlexander V. Chernikov */ 222181d3153dSAlexander V. Chernikov static int 222281d3153dSAlexander V. Chernikov dump_table_tentry(void *e, void *arg) 222381d3153dSAlexander V. Chernikov { 222481d3153dSAlexander V. Chernikov struct dump_args *da; 222581d3153dSAlexander V. Chernikov struct table_config *tc; 222681d3153dSAlexander V. Chernikov struct table_algo *ta; 222781d3153dSAlexander V. Chernikov ipfw_obj_tentry *tent; 222881d3153dSAlexander V. Chernikov 222981d3153dSAlexander V. Chernikov da = (struct dump_args *)arg; 223081d3153dSAlexander V. Chernikov 223181d3153dSAlexander V. Chernikov tc = da->tc; 223281d3153dSAlexander V. Chernikov ta = tc->ta; 223381d3153dSAlexander V. Chernikov 223481d3153dSAlexander V. Chernikov tent = (ipfw_obj_tentry *)ipfw_get_sopt_space(da->sd, sizeof(*tent)); 223581d3153dSAlexander V. Chernikov /* Out of memory, returning */ 223681d3153dSAlexander V. Chernikov if (tent == NULL) { 223781d3153dSAlexander V. Chernikov da->error = ENOMEM; 223881d3153dSAlexander V. Chernikov return (1); 223981d3153dSAlexander V. Chernikov } 224081d3153dSAlexander V. Chernikov tent->head.length = sizeof(ipfw_obj_tentry); 224181d3153dSAlexander V. Chernikov tent->idx = da->uidx; 224281d3153dSAlexander V. Chernikov 224381d3153dSAlexander V. Chernikov return (ta->dump_tentry(tc->astate, da->ti, e, tent)); 224481d3153dSAlexander V. Chernikov } 224581d3153dSAlexander V. Chernikov 224681d3153dSAlexander V. Chernikov /* 224781d3153dSAlexander V. Chernikov * Dumps table entry in eXtended format (v0). 22489490a627SAlexander V. Chernikov */ 22493b3a8eb9SGleb Smirnoff static int 22509f7d47b0SAlexander V. Chernikov dump_table_xentry(void *e, void *arg) 22513b3a8eb9SGleb Smirnoff { 22529f7d47b0SAlexander V. Chernikov struct dump_args *da; 22539f7d47b0SAlexander V. Chernikov struct table_config *tc; 22549f7d47b0SAlexander V. Chernikov struct table_algo *ta; 22553b3a8eb9SGleb Smirnoff ipfw_table_xentry *xent; 225681d3153dSAlexander V. Chernikov ipfw_obj_tentry *tent; 225781d3153dSAlexander V. Chernikov int error; 22583b3a8eb9SGleb Smirnoff 22599f7d47b0SAlexander V. Chernikov da = (struct dump_args *)arg; 22609f7d47b0SAlexander V. Chernikov 22619f7d47b0SAlexander V. Chernikov tc = da->tc; 22629f7d47b0SAlexander V. Chernikov ta = tc->ta; 22639f7d47b0SAlexander V. Chernikov 22642d99a349SAlexander V. Chernikov xent = (ipfw_table_xentry *)ipfw_get_sopt_space(da->sd, sizeof(*xent)); 22653b3a8eb9SGleb Smirnoff /* Out of memory, returning */ 22662d99a349SAlexander V. Chernikov if (xent == NULL) 22673b3a8eb9SGleb Smirnoff return (1); 22683b3a8eb9SGleb Smirnoff xent->len = sizeof(ipfw_table_xentry); 2269f1220db8SAlexander V. Chernikov xent->tbl = da->uidx; 22709f7d47b0SAlexander V. Chernikov 227181d3153dSAlexander V. Chernikov memset(&da->tent, 0, sizeof(da->tent)); 227281d3153dSAlexander V. Chernikov tent = &da->tent; 227381d3153dSAlexander V. Chernikov error = ta->dump_tentry(tc->astate, da->ti, e, tent); 227481d3153dSAlexander V. Chernikov if (error != 0) 227581d3153dSAlexander V. Chernikov return (error); 227681d3153dSAlexander V. Chernikov 227781d3153dSAlexander V. Chernikov /* Convert current format to previous one */ 227881d3153dSAlexander V. Chernikov xent->masklen = tent->masklen; 227981d3153dSAlexander V. Chernikov xent->value = tent->value; 228081d3153dSAlexander V. Chernikov /* Apply some hacks */ 228181d3153dSAlexander V. Chernikov if (tc->no.type == IPFW_TABLE_CIDR && tent->subtype == AF_INET) { 228281d3153dSAlexander V. Chernikov xent->k.addr6.s6_addr32[3] = tent->k.addr.s_addr; 228381d3153dSAlexander V. Chernikov xent->flags = IPFW_TCF_INET; 228481d3153dSAlexander V. Chernikov } else 228581d3153dSAlexander V. Chernikov memcpy(&xent->k, &tent->k, sizeof(xent->k)); 228681d3153dSAlexander V. Chernikov 228781d3153dSAlexander V. Chernikov return (0); 22889f7d47b0SAlexander V. Chernikov } 22899f7d47b0SAlexander V. Chernikov 22909f7d47b0SAlexander V. Chernikov /* 22919f7d47b0SAlexander V. Chernikov * Table algorithms 22929f7d47b0SAlexander V. Chernikov */ 22933b3a8eb9SGleb Smirnoff 22949f7d47b0SAlexander V. Chernikov /* 229535e1bbd0SAlexander V. Chernikov * Finds algoritm by index, table type or supplied name. 229635e1bbd0SAlexander V. Chernikov * 229735e1bbd0SAlexander V. Chernikov * Returns pointer to algo or NULL. 22989f7d47b0SAlexander V. Chernikov */ 22999f7d47b0SAlexander V. Chernikov static struct table_algo * 23009490a627SAlexander V. Chernikov find_table_algo(struct tables_config *tcfg, struct tid_info *ti, char *name) 23019f7d47b0SAlexander V. Chernikov { 23029490a627SAlexander V. Chernikov int i, l; 23039490a627SAlexander V. Chernikov struct table_algo *ta; 23049f7d47b0SAlexander V. Chernikov 230557a1cf95SAlexander V. Chernikov if (ti->type > IPFW_TABLE_MAXTYPE) 230657a1cf95SAlexander V. Chernikov return (NULL); 230757a1cf95SAlexander V. Chernikov 23089f7d47b0SAlexander V. Chernikov /* Search by index */ 23099f7d47b0SAlexander V. Chernikov if (ti->atype != 0) { 23109f7d47b0SAlexander V. Chernikov if (ti->atype > tcfg->algo_count) 23119f7d47b0SAlexander V. Chernikov return (NULL); 23129f7d47b0SAlexander V. Chernikov return (tcfg->algo[ti->atype]); 23139f7d47b0SAlexander V. Chernikov } 23149f7d47b0SAlexander V. Chernikov 23159490a627SAlexander V. Chernikov /* Search by name if supplied */ 23169490a627SAlexander V. Chernikov if (name != NULL) { 23179490a627SAlexander V. Chernikov /* TODO: better search */ 23189490a627SAlexander V. Chernikov for (i = 1; i <= tcfg->algo_count; i++) { 23199490a627SAlexander V. Chernikov ta = tcfg->algo[i]; 23209490a627SAlexander V. Chernikov 23219490a627SAlexander V. Chernikov /* 23229490a627SAlexander V. Chernikov * One can supply additional algorithm 23239490a627SAlexander V. Chernikov * parameters so we compare only the first word 23249490a627SAlexander V. Chernikov * of supplied name: 23259490a627SAlexander V. Chernikov * 'hash_cidr hsize=32' 23269490a627SAlexander V. Chernikov * '^^^^^^^^^' 23279490a627SAlexander V. Chernikov * 23289490a627SAlexander V. Chernikov */ 23299490a627SAlexander V. Chernikov l = strlen(ta->name); 23309490a627SAlexander V. Chernikov if (strncmp(name, ta->name, l) == 0) { 23319490a627SAlexander V. Chernikov if (name[l] == '\0' || name[l] == ' ') 23329490a627SAlexander V. Chernikov return (ta); 23339490a627SAlexander V. Chernikov } 23349490a627SAlexander V. Chernikov } 23359490a627SAlexander V. Chernikov 23369490a627SAlexander V. Chernikov return (NULL); 23379490a627SAlexander V. Chernikov } 23389490a627SAlexander V. Chernikov 233957a1cf95SAlexander V. Chernikov /* Return default algorithm for given type if set */ 234057a1cf95SAlexander V. Chernikov return (tcfg->def_algo[ti->type]); 23413b3a8eb9SGleb Smirnoff } 23423b3a8eb9SGleb Smirnoff 2343b6ee846eSAlexander V. Chernikov /* 2344b6ee846eSAlexander V. Chernikov * Register new table algo @ta. 234535e1bbd0SAlexander V. Chernikov * Stores algo id inside @idx. 2346b6ee846eSAlexander V. Chernikov * 2347b6ee846eSAlexander V. Chernikov * Returns 0 on success. 2348b6ee846eSAlexander V. Chernikov */ 23490b565ac0SAlexander V. Chernikov int 23500b565ac0SAlexander V. Chernikov ipfw_add_table_algo(struct ip_fw_chain *ch, struct table_algo *ta, size_t size, 23510b565ac0SAlexander V. Chernikov int *idx) 23523b3a8eb9SGleb Smirnoff { 23539f7d47b0SAlexander V. Chernikov struct tables_config *tcfg; 23540b565ac0SAlexander V. Chernikov struct table_algo *ta_new; 2355b6ee846eSAlexander V. Chernikov size_t sz; 23560b565ac0SAlexander V. Chernikov 23570b565ac0SAlexander V. Chernikov if (size > sizeof(struct table_algo)) 23580b565ac0SAlexander V. Chernikov return (EINVAL); 23590b565ac0SAlexander V. Chernikov 2360b6ee846eSAlexander V. Chernikov /* Check for the required on-stack size for add/del */ 2361b6ee846eSAlexander V. Chernikov sz = roundup2(ta->ta_buf_size, sizeof(void *)); 2362b6ee846eSAlexander V. Chernikov if (sz > TA_BUF_SZ) 2363b6ee846eSAlexander V. Chernikov return (EINVAL); 2364b6ee846eSAlexander V. Chernikov 236557a1cf95SAlexander V. Chernikov KASSERT(ta->type >= IPFW_TABLE_MAXTYPE,("Increase IPFW_TABLE_MAXTYPE")); 236657a1cf95SAlexander V. Chernikov 236735e1bbd0SAlexander V. Chernikov /* Copy algorithm data to stable storage. */ 23680b565ac0SAlexander V. Chernikov ta_new = malloc(sizeof(struct table_algo), M_IPFW, M_WAITOK | M_ZERO); 23690b565ac0SAlexander V. Chernikov memcpy(ta_new, ta, size); 23703b3a8eb9SGleb Smirnoff 23719f7d47b0SAlexander V. Chernikov tcfg = CHAIN_TO_TCFG(ch); 2372b074b7bbSAlexander V. Chernikov 23739f7d47b0SAlexander V. Chernikov KASSERT(tcfg->algo_count < 255, ("Increase algo array size")); 23749f7d47b0SAlexander V. Chernikov 23750b565ac0SAlexander V. Chernikov tcfg->algo[++tcfg->algo_count] = ta_new; 23760b565ac0SAlexander V. Chernikov ta_new->idx = tcfg->algo_count; 23770b565ac0SAlexander V. Chernikov 237857a1cf95SAlexander V. Chernikov /* Set algorithm as default one for given type */ 237957a1cf95SAlexander V. Chernikov if ((ta_new->flags & TA_FLAG_DEFAULT) != 0 && 238057a1cf95SAlexander V. Chernikov tcfg->def_algo[ta_new->type] == NULL) 238157a1cf95SAlexander V. Chernikov tcfg->def_algo[ta_new->type] = ta_new; 238257a1cf95SAlexander V. Chernikov 23830b565ac0SAlexander V. Chernikov *idx = ta_new->idx; 23840b565ac0SAlexander V. Chernikov 23850b565ac0SAlexander V. Chernikov return (0); 23860b565ac0SAlexander V. Chernikov } 23870b565ac0SAlexander V. Chernikov 2388b6ee846eSAlexander V. Chernikov /* 2389b6ee846eSAlexander V. Chernikov * Unregisters table algo using @idx as id. 2390c8d5d308SAlexander V. Chernikov * XXX: It is NOT safe to call this function in any place 2391c8d5d308SAlexander V. Chernikov * other than ipfw instance destroy handler. 2392b6ee846eSAlexander V. Chernikov */ 23930b565ac0SAlexander V. Chernikov void 23940b565ac0SAlexander V. Chernikov ipfw_del_table_algo(struct ip_fw_chain *ch, int idx) 23950b565ac0SAlexander V. Chernikov { 23960b565ac0SAlexander V. Chernikov struct tables_config *tcfg; 23970b565ac0SAlexander V. Chernikov struct table_algo *ta; 23980b565ac0SAlexander V. Chernikov 23990b565ac0SAlexander V. Chernikov tcfg = CHAIN_TO_TCFG(ch); 24000b565ac0SAlexander V. Chernikov 2401b6ee846eSAlexander V. Chernikov KASSERT(idx <= tcfg->algo_count, ("algo idx %d out of range 1..%d", 2402b6ee846eSAlexander V. Chernikov idx, tcfg->algo_count)); 24030b565ac0SAlexander V. Chernikov 24040b565ac0SAlexander V. Chernikov ta = tcfg->algo[idx]; 24050b565ac0SAlexander V. Chernikov KASSERT(ta != NULL, ("algo idx %d is NULL", idx)); 240657a1cf95SAlexander V. Chernikov 240757a1cf95SAlexander V. Chernikov if (tcfg->def_algo[ta->type] == ta) 240857a1cf95SAlexander V. Chernikov tcfg->def_algo[ta->type] = NULL; 240957a1cf95SAlexander V. Chernikov 24100b565ac0SAlexander V. Chernikov free(ta, M_IPFW); 24113b3a8eb9SGleb Smirnoff } 24123b3a8eb9SGleb Smirnoff 24139d099b4fSAlexander V. Chernikov /* 24149d099b4fSAlexander V. Chernikov * Lists all table algorithms currently available. 24159d099b4fSAlexander V. Chernikov * Data layout (v0)(current): 24169d099b4fSAlexander V. Chernikov * Request: [ ipfw_obj_lheader ], size = ipfw_obj_lheader.size 24179d099b4fSAlexander V. Chernikov * Reply: [ ipfw_obj_lheader ipfw_ta_info x N ] 24189d099b4fSAlexander V. Chernikov * 24199d099b4fSAlexander V. Chernikov * Returns 0 on success 24209d099b4fSAlexander V. Chernikov */ 24219d099b4fSAlexander V. Chernikov int 24229d099b4fSAlexander V. Chernikov ipfw_list_table_algo(struct ip_fw_chain *ch, struct sockopt_data *sd) 24239d099b4fSAlexander V. Chernikov { 24249d099b4fSAlexander V. Chernikov struct _ipfw_obj_lheader *olh; 24259d099b4fSAlexander V. Chernikov struct tables_config *tcfg; 24269d099b4fSAlexander V. Chernikov ipfw_ta_info *i; 24279d099b4fSAlexander V. Chernikov struct table_algo *ta; 24289d099b4fSAlexander V. Chernikov uint32_t count, n, size; 24299d099b4fSAlexander V. Chernikov 24309d099b4fSAlexander V. Chernikov olh = (struct _ipfw_obj_lheader *)ipfw_get_sopt_header(sd,sizeof(*olh)); 24319d099b4fSAlexander V. Chernikov if (olh == NULL) 24329d099b4fSAlexander V. Chernikov return (EINVAL); 24339d099b4fSAlexander V. Chernikov if (sd->valsize < olh->size) 24349d099b4fSAlexander V. Chernikov return (EINVAL); 24359d099b4fSAlexander V. Chernikov 24369d099b4fSAlexander V. Chernikov IPFW_UH_RLOCK(ch); 24379d099b4fSAlexander V. Chernikov tcfg = CHAIN_TO_TCFG(ch); 24389d099b4fSAlexander V. Chernikov count = tcfg->algo_count; 24399d099b4fSAlexander V. Chernikov size = count * sizeof(ipfw_ta_info) + sizeof(ipfw_obj_lheader); 24409d099b4fSAlexander V. Chernikov 24419d099b4fSAlexander V. Chernikov /* Fill in header regadless of buffer size */ 24429d099b4fSAlexander V. Chernikov olh->count = count; 24439d099b4fSAlexander V. Chernikov olh->objsize = sizeof(ipfw_ta_info); 24449d099b4fSAlexander V. Chernikov 24459d099b4fSAlexander V. Chernikov if (size > olh->size) { 24469d099b4fSAlexander V. Chernikov olh->size = size; 24479d099b4fSAlexander V. Chernikov IPFW_UH_RUNLOCK(ch); 24489d099b4fSAlexander V. Chernikov return (ENOMEM); 24499d099b4fSAlexander V. Chernikov } 24509d099b4fSAlexander V. Chernikov olh->size = size; 24519d099b4fSAlexander V. Chernikov 24529d099b4fSAlexander V. Chernikov for (n = 1; n <= count; n++) { 24539d099b4fSAlexander V. Chernikov i = (ipfw_ta_info *)ipfw_get_sopt_space(sd, sizeof(*i)); 24549d099b4fSAlexander V. Chernikov KASSERT(i != 0, ("previously checked buffer is not enough")); 24559d099b4fSAlexander V. Chernikov ta = tcfg->algo[n]; 24569d099b4fSAlexander V. Chernikov strlcpy(i->algoname, ta->name, sizeof(i->algoname)); 24579d099b4fSAlexander V. Chernikov i->type = ta->type; 24589d099b4fSAlexander V. Chernikov i->refcnt = ta->refcnt; 24599d099b4fSAlexander V. Chernikov } 24609d099b4fSAlexander V. Chernikov 24619d099b4fSAlexander V. Chernikov IPFW_UH_RUNLOCK(ch); 24629d099b4fSAlexander V. Chernikov 24639d099b4fSAlexander V. Chernikov return (0); 24649d099b4fSAlexander V. Chernikov } 24659d099b4fSAlexander V. Chernikov 2466b074b7bbSAlexander V. Chernikov /* 2467b074b7bbSAlexander V. Chernikov * Tables rewriting code 2468b074b7bbSAlexander V. Chernikov */ 2469b074b7bbSAlexander V. Chernikov 2470b074b7bbSAlexander V. Chernikov /* 2471b074b7bbSAlexander V. Chernikov * Determine table number and lookup type for @cmd. 2472b074b7bbSAlexander V. Chernikov * Fill @tbl and @type with appropriate values. 2473b074b7bbSAlexander V. Chernikov * Returns 0 for relevant opcodes, 1 otherwise. 2474b074b7bbSAlexander V. Chernikov */ 2475b074b7bbSAlexander V. Chernikov static int 2476b074b7bbSAlexander V. Chernikov classify_table_opcode(ipfw_insn *cmd, uint16_t *puidx, uint8_t *ptype) 2477b074b7bbSAlexander V. Chernikov { 2478b074b7bbSAlexander V. Chernikov ipfw_insn_if *cmdif; 2479b074b7bbSAlexander V. Chernikov int skip; 2480b074b7bbSAlexander V. Chernikov uint16_t v; 2481b074b7bbSAlexander V. Chernikov 2482b074b7bbSAlexander V. Chernikov skip = 1; 2483b074b7bbSAlexander V. Chernikov 2484b074b7bbSAlexander V. Chernikov switch (cmd->opcode) { 2485b074b7bbSAlexander V. Chernikov case O_IP_SRC_LOOKUP: 2486b074b7bbSAlexander V. Chernikov case O_IP_DST_LOOKUP: 2487b074b7bbSAlexander V. Chernikov /* Basic IPv4/IPv6 or u32 lookups */ 2488b074b7bbSAlexander V. Chernikov *puidx = cmd->arg1; 2489b074b7bbSAlexander V. Chernikov /* Assume CIDR by default */ 2490b074b7bbSAlexander V. Chernikov *ptype = IPFW_TABLE_CIDR; 2491b074b7bbSAlexander V. Chernikov skip = 0; 2492b074b7bbSAlexander V. Chernikov 2493b074b7bbSAlexander V. Chernikov if (F_LEN(cmd) > F_INSN_SIZE(ipfw_insn_u32)) { 2494b074b7bbSAlexander V. Chernikov /* 2495b074b7bbSAlexander V. Chernikov * generic lookup. The key must be 2496b074b7bbSAlexander V. Chernikov * in 32bit big-endian format. 2497b074b7bbSAlexander V. Chernikov */ 2498b074b7bbSAlexander V. Chernikov v = ((ipfw_insn_u32 *)cmd)->d[1]; 2499b074b7bbSAlexander V. Chernikov switch (v) { 2500b074b7bbSAlexander V. Chernikov case 0: 2501b074b7bbSAlexander V. Chernikov case 1: 2502b074b7bbSAlexander V. Chernikov /* IPv4 src/dst */ 2503b074b7bbSAlexander V. Chernikov break; 2504b074b7bbSAlexander V. Chernikov case 2: 2505b074b7bbSAlexander V. Chernikov case 3: 2506b074b7bbSAlexander V. Chernikov /* src/dst port */ 2507b23d5de9SAlexander V. Chernikov *ptype = IPFW_TABLE_NUMBER; 2508b074b7bbSAlexander V. Chernikov break; 2509b074b7bbSAlexander V. Chernikov case 4: 2510b074b7bbSAlexander V. Chernikov /* uid/gid */ 2511b23d5de9SAlexander V. Chernikov *ptype = IPFW_TABLE_NUMBER; 2512b23d5de9SAlexander V. Chernikov break; 2513b074b7bbSAlexander V. Chernikov case 5: 2514b074b7bbSAlexander V. Chernikov /* jid */ 2515b23d5de9SAlexander V. Chernikov *ptype = IPFW_TABLE_NUMBER; 2516b23d5de9SAlexander V. Chernikov break; 2517b074b7bbSAlexander V. Chernikov case 6: 2518b074b7bbSAlexander V. Chernikov /* dscp */ 2519b23d5de9SAlexander V. Chernikov *ptype = IPFW_TABLE_NUMBER; 2520b074b7bbSAlexander V. Chernikov break; 2521b074b7bbSAlexander V. Chernikov } 2522b074b7bbSAlexander V. Chernikov } 2523b074b7bbSAlexander V. Chernikov break; 2524b074b7bbSAlexander V. Chernikov case O_XMIT: 2525b074b7bbSAlexander V. Chernikov case O_RECV: 2526b074b7bbSAlexander V. Chernikov case O_VIA: 2527b074b7bbSAlexander V. Chernikov /* Interface table, possibly */ 2528b074b7bbSAlexander V. Chernikov cmdif = (ipfw_insn_if *)cmd; 2529b074b7bbSAlexander V. Chernikov if (cmdif->name[0] != '\1') 2530b074b7bbSAlexander V. Chernikov break; 2531b074b7bbSAlexander V. Chernikov 2532b074b7bbSAlexander V. Chernikov *ptype = IPFW_TABLE_INTERFACE; 25331940fa77SAlexander V. Chernikov *puidx = cmdif->p.kidx; 2534b074b7bbSAlexander V. Chernikov skip = 0; 2535b074b7bbSAlexander V. Chernikov break; 2536914bffb6SAlexander V. Chernikov case O_IP_FLOW_LOOKUP: 2537914bffb6SAlexander V. Chernikov *puidx = cmd->arg1; 2538914bffb6SAlexander V. Chernikov *ptype = IPFW_TABLE_FLOW; 2539914bffb6SAlexander V. Chernikov skip = 0; 2540914bffb6SAlexander V. Chernikov break; 2541b074b7bbSAlexander V. Chernikov } 2542b074b7bbSAlexander V. Chernikov 2543b074b7bbSAlexander V. Chernikov return (skip); 2544b074b7bbSAlexander V. Chernikov } 2545b074b7bbSAlexander V. Chernikov 2546b074b7bbSAlexander V. Chernikov /* 2547b074b7bbSAlexander V. Chernikov * Sets new table value for given opcode. 2548b074b7bbSAlexander V. Chernikov * Assume the same opcodes as classify_table_opcode() 2549b074b7bbSAlexander V. Chernikov */ 2550b074b7bbSAlexander V. Chernikov static void 2551b074b7bbSAlexander V. Chernikov update_table_opcode(ipfw_insn *cmd, uint16_t idx) 2552b074b7bbSAlexander V. Chernikov { 2553b074b7bbSAlexander V. Chernikov ipfw_insn_if *cmdif; 2554b074b7bbSAlexander V. Chernikov 2555b074b7bbSAlexander V. Chernikov switch (cmd->opcode) { 2556b074b7bbSAlexander V. Chernikov case O_IP_SRC_LOOKUP: 2557b074b7bbSAlexander V. Chernikov case O_IP_DST_LOOKUP: 2558b074b7bbSAlexander V. Chernikov /* Basic IPv4/IPv6 or u32 lookups */ 2559b074b7bbSAlexander V. Chernikov cmd->arg1 = idx; 2560b074b7bbSAlexander V. Chernikov break; 2561b074b7bbSAlexander V. Chernikov case O_XMIT: 2562b074b7bbSAlexander V. Chernikov case O_RECV: 2563b074b7bbSAlexander V. Chernikov case O_VIA: 2564b074b7bbSAlexander V. Chernikov /* Interface table, possibly */ 2565b074b7bbSAlexander V. Chernikov cmdif = (ipfw_insn_if *)cmd; 25661940fa77SAlexander V. Chernikov cmdif->p.kidx = idx; 2567b074b7bbSAlexander V. Chernikov break; 2568914bffb6SAlexander V. Chernikov case O_IP_FLOW_LOOKUP: 2569914bffb6SAlexander V. Chernikov cmd->arg1 = idx; 2570914bffb6SAlexander V. Chernikov break; 2571b074b7bbSAlexander V. Chernikov } 2572b074b7bbSAlexander V. Chernikov } 2573b074b7bbSAlexander V. Chernikov 2574ac35ff17SAlexander V. Chernikov /* 2575ac35ff17SAlexander V. Chernikov * Checks table name for validity. 2576ac35ff17SAlexander V. Chernikov * Enforce basic length checks, the rest 2577ac35ff17SAlexander V. Chernikov * should be done in userland. 2578ac35ff17SAlexander V. Chernikov * 2579ac35ff17SAlexander V. Chernikov * Returns 0 if name is considered valid. 2580ac35ff17SAlexander V. Chernikov */ 2581ac35ff17SAlexander V. Chernikov int 2582ac35ff17SAlexander V. Chernikov ipfw_check_table_name(char *name) 2583ac35ff17SAlexander V. Chernikov { 2584ac35ff17SAlexander V. Chernikov int nsize; 2585ac35ff17SAlexander V. Chernikov ipfw_obj_ntlv *ntlv = NULL; 2586ac35ff17SAlexander V. Chernikov 2587ac35ff17SAlexander V. Chernikov nsize = sizeof(ntlv->name); 2588ac35ff17SAlexander V. Chernikov 2589ac35ff17SAlexander V. Chernikov if (strnlen(name, nsize) == nsize) 2590ac35ff17SAlexander V. Chernikov return (EINVAL); 2591ac35ff17SAlexander V. Chernikov 2592ac35ff17SAlexander V. Chernikov if (name[0] == '\0') 2593ac35ff17SAlexander V. Chernikov return (EINVAL); 2594ac35ff17SAlexander V. Chernikov 2595ac35ff17SAlexander V. Chernikov /* 2596ac35ff17SAlexander V. Chernikov * TODO: do some more complicated checks 2597ac35ff17SAlexander V. Chernikov */ 2598ac35ff17SAlexander V. Chernikov 2599ac35ff17SAlexander V. Chernikov return (0); 2600ac35ff17SAlexander V. Chernikov } 2601ac35ff17SAlexander V. Chernikov 2602ac35ff17SAlexander V. Chernikov /* 2603ac35ff17SAlexander V. Chernikov * Find tablename TLV by @uid. 2604ac35ff17SAlexander V. Chernikov * Check @tlvs for valid data inside. 2605ac35ff17SAlexander V. Chernikov * 2606ac35ff17SAlexander V. Chernikov * Returns pointer to found TLV or NULL. 2607ac35ff17SAlexander V. Chernikov */ 2608ac35ff17SAlexander V. Chernikov static ipfw_obj_ntlv * 2609b074b7bbSAlexander V. Chernikov find_name_tlv(void *tlvs, int len, uint16_t uidx) 2610b074b7bbSAlexander V. Chernikov { 26119f7d47b0SAlexander V. Chernikov ipfw_obj_ntlv *ntlv; 2612b074b7bbSAlexander V. Chernikov uintptr_t pa, pe; 2613b074b7bbSAlexander V. Chernikov int l; 2614b074b7bbSAlexander V. Chernikov 2615b074b7bbSAlexander V. Chernikov pa = (uintptr_t)tlvs; 2616b074b7bbSAlexander V. Chernikov pe = pa + len; 2617b074b7bbSAlexander V. Chernikov l = 0; 2618b074b7bbSAlexander V. Chernikov for (; pa < pe; pa += l) { 26199f7d47b0SAlexander V. Chernikov ntlv = (ipfw_obj_ntlv *)pa; 2620b074b7bbSAlexander V. Chernikov l = ntlv->head.length; 2621ac35ff17SAlexander V. Chernikov 2622ac35ff17SAlexander V. Chernikov if (l != sizeof(*ntlv)) 2623ac35ff17SAlexander V. Chernikov return (NULL); 2624ac35ff17SAlexander V. Chernikov 2625563b5ab1SAlexander V. Chernikov if (ntlv->head.type != IPFW_TLV_TBL_NAME) 2626b074b7bbSAlexander V. Chernikov continue; 2627ac35ff17SAlexander V. Chernikov 2628b074b7bbSAlexander V. Chernikov if (ntlv->idx != uidx) 2629b074b7bbSAlexander V. Chernikov continue; 2630b074b7bbSAlexander V. Chernikov 2631ac35ff17SAlexander V. Chernikov if (ipfw_check_table_name(ntlv->name) != 0) 2632ac35ff17SAlexander V. Chernikov return (NULL); 2633ac35ff17SAlexander V. Chernikov 2634ac35ff17SAlexander V. Chernikov return (ntlv); 2635b074b7bbSAlexander V. Chernikov } 2636b074b7bbSAlexander V. Chernikov 2637b074b7bbSAlexander V. Chernikov return (NULL); 2638b074b7bbSAlexander V. Chernikov } 2639b074b7bbSAlexander V. Chernikov 2640ac35ff17SAlexander V. Chernikov /* 2641ac35ff17SAlexander V. Chernikov * Finds table config based on either legacy index 2642ac35ff17SAlexander V. Chernikov * or name in ntlv. 2643ac35ff17SAlexander V. Chernikov * Note @ti structure contains unchecked data from userland. 2644ac35ff17SAlexander V. Chernikov * 2645ac35ff17SAlexander V. Chernikov * Returns pointer to table_config or NULL. 2646ac35ff17SAlexander V. Chernikov */ 2647b074b7bbSAlexander V. Chernikov static struct table_config * 2648b074b7bbSAlexander V. Chernikov find_table(struct namedobj_instance *ni, struct tid_info *ti) 2649b074b7bbSAlexander V. Chernikov { 2650b074b7bbSAlexander V. Chernikov char *name, bname[16]; 2651b074b7bbSAlexander V. Chernikov struct named_object *no; 2652ac35ff17SAlexander V. Chernikov ipfw_obj_ntlv *ntlv; 2653ac35ff17SAlexander V. Chernikov uint32_t set; 2654b074b7bbSAlexander V. Chernikov 2655b074b7bbSAlexander V. Chernikov if (ti->tlvs != NULL) { 2656ac35ff17SAlexander V. Chernikov ntlv = find_name_tlv(ti->tlvs, ti->tlen, ti->uidx); 2657ac35ff17SAlexander V. Chernikov if (ntlv == NULL) 2658b074b7bbSAlexander V. Chernikov return (NULL); 2659ac35ff17SAlexander V. Chernikov name = ntlv->name; 266040e5f498SAlexander V. Chernikov 266140e5f498SAlexander V. Chernikov /* 266240e5f498SAlexander V. Chernikov * Use set provided by @ti instead of @ntlv one. 266340e5f498SAlexander V. Chernikov * This is needed due to different sets behavior 266440e5f498SAlexander V. Chernikov * controlled by V_fw_tables_sets. 266540e5f498SAlexander V. Chernikov */ 266640e5f498SAlexander V. Chernikov set = ti->set; 2667b074b7bbSAlexander V. Chernikov } else { 2668b074b7bbSAlexander V. Chernikov snprintf(bname, sizeof(bname), "%d", ti->uidx); 2669b074b7bbSAlexander V. Chernikov name = bname; 2670ac35ff17SAlexander V. Chernikov set = 0; 2671b074b7bbSAlexander V. Chernikov } 2672b074b7bbSAlexander V. Chernikov 2673ac35ff17SAlexander V. Chernikov no = ipfw_objhash_lookup_name(ni, set, name); 2674b074b7bbSAlexander V. Chernikov 2675b074b7bbSAlexander V. Chernikov return ((struct table_config *)no); 2676b074b7bbSAlexander V. Chernikov } 2677b074b7bbSAlexander V. Chernikov 267835e1bbd0SAlexander V. Chernikov /* 267935e1bbd0SAlexander V. Chernikov * Allocate new table config structure using 268035e1bbd0SAlexander V. Chernikov * specified @algo and @aname. 268135e1bbd0SAlexander V. Chernikov * 268235e1bbd0SAlexander V. Chernikov * Returns pointer to config or NULL. 268335e1bbd0SAlexander V. Chernikov */ 2684b074b7bbSAlexander V. Chernikov static struct table_config * 268568394ec8SAlexander V. Chernikov alloc_table_config(struct ip_fw_chain *ch, struct tid_info *ti, 2686914bffb6SAlexander V. Chernikov struct table_algo *ta, char *aname, uint8_t tflags, uint8_t vtype) 2687b074b7bbSAlexander V. Chernikov { 2688b074b7bbSAlexander V. Chernikov char *name, bname[16]; 2689b074b7bbSAlexander V. Chernikov struct table_config *tc; 2690b074b7bbSAlexander V. Chernikov int error; 2691ac35ff17SAlexander V. Chernikov ipfw_obj_ntlv *ntlv; 2692ac35ff17SAlexander V. Chernikov uint32_t set; 2693b074b7bbSAlexander V. Chernikov 2694b074b7bbSAlexander V. Chernikov if (ti->tlvs != NULL) { 2695ac35ff17SAlexander V. Chernikov ntlv = find_name_tlv(ti->tlvs, ti->tlen, ti->uidx); 2696ac35ff17SAlexander V. Chernikov if (ntlv == NULL) 2697b074b7bbSAlexander V. Chernikov return (NULL); 2698ac35ff17SAlexander V. Chernikov name = ntlv->name; 2699ac35ff17SAlexander V. Chernikov set = ntlv->set; 2700b074b7bbSAlexander V. Chernikov } else { 2701b074b7bbSAlexander V. Chernikov snprintf(bname, sizeof(bname), "%d", ti->uidx); 2702b074b7bbSAlexander V. Chernikov name = bname; 2703ac35ff17SAlexander V. Chernikov set = 0; 2704b074b7bbSAlexander V. Chernikov } 2705b074b7bbSAlexander V. Chernikov 2706b074b7bbSAlexander V. Chernikov tc = malloc(sizeof(struct table_config), M_IPFW, M_WAITOK | M_ZERO); 2707b074b7bbSAlexander V. Chernikov tc->no.name = tc->tablename; 2708b074b7bbSAlexander V. Chernikov tc->no.type = ti->type; 2709ac35ff17SAlexander V. Chernikov tc->no.set = set; 2710914bffb6SAlexander V. Chernikov tc->tflags = tflags; 27119f7d47b0SAlexander V. Chernikov tc->ta = ta; 2712b074b7bbSAlexander V. Chernikov strlcpy(tc->tablename, name, sizeof(tc->tablename)); 2713db785d31SAlexander V. Chernikov tc->vtype = vtype; 2714b074b7bbSAlexander V. Chernikov 2715b074b7bbSAlexander V. Chernikov if (ti->tlvs == NULL) { 2716b074b7bbSAlexander V. Chernikov tc->no.compat = 1; 2717b074b7bbSAlexander V. Chernikov tc->no.uidx = ti->uidx; 2718b074b7bbSAlexander V. Chernikov } 2719b074b7bbSAlexander V. Chernikov 2720b074b7bbSAlexander V. Chernikov /* Preallocate data structures for new tables */ 2721914bffb6SAlexander V. Chernikov error = ta->init(ch, &tc->astate, &tc->ti, aname, tflags); 2722b074b7bbSAlexander V. Chernikov if (error != 0) { 2723b074b7bbSAlexander V. Chernikov free(tc, M_IPFW); 2724b074b7bbSAlexander V. Chernikov return (NULL); 2725b074b7bbSAlexander V. Chernikov } 2726b074b7bbSAlexander V. Chernikov 2727b074b7bbSAlexander V. Chernikov return (tc); 2728b074b7bbSAlexander V. Chernikov } 2729b074b7bbSAlexander V. Chernikov 273035e1bbd0SAlexander V. Chernikov /* 273135e1bbd0SAlexander V. Chernikov * Destroys table state and config. 273235e1bbd0SAlexander V. Chernikov */ 2733b074b7bbSAlexander V. Chernikov static void 2734b074b7bbSAlexander V. Chernikov free_table_config(struct namedobj_instance *ni, struct table_config *tc) 2735b074b7bbSAlexander V. Chernikov { 2736b074b7bbSAlexander V. Chernikov 273735e1bbd0SAlexander V. Chernikov KASSERT(tc->linked == 0, ("free() on linked config")); 2738b074b7bbSAlexander V. Chernikov 27390468c5baSAlexander V. Chernikov /* 27400468c5baSAlexander V. Chernikov * We're using ta without any locking/referencing. 27410468c5baSAlexander V. Chernikov * TODO: fix this if we're going to use unloadable algos. 27420468c5baSAlexander V. Chernikov */ 274335e1bbd0SAlexander V. Chernikov tc->ta->destroy(tc->astate, &tc->ti); 2744b074b7bbSAlexander V. Chernikov free(tc, M_IPFW); 2745b074b7bbSAlexander V. Chernikov } 2746b074b7bbSAlexander V. Chernikov 2747b074b7bbSAlexander V. Chernikov /* 2748b074b7bbSAlexander V. Chernikov * Links @tc to @chain table named instance. 2749b074b7bbSAlexander V. Chernikov * Sets appropriate type/states in @chain table info. 2750b074b7bbSAlexander V. Chernikov */ 2751b074b7bbSAlexander V. Chernikov static void 27529f7d47b0SAlexander V. Chernikov link_table(struct ip_fw_chain *ch, struct table_config *tc) 2753b074b7bbSAlexander V. Chernikov { 2754b074b7bbSAlexander V. Chernikov struct namedobj_instance *ni; 27559f7d47b0SAlexander V. Chernikov struct table_info *ti; 2756b074b7bbSAlexander V. Chernikov uint16_t kidx; 2757b074b7bbSAlexander V. Chernikov 27589f7d47b0SAlexander V. Chernikov IPFW_UH_WLOCK_ASSERT(ch); 27599f7d47b0SAlexander V. Chernikov IPFW_WLOCK_ASSERT(ch); 2760b074b7bbSAlexander V. Chernikov 27619f7d47b0SAlexander V. Chernikov ni = CHAIN_TO_NI(ch); 2762b074b7bbSAlexander V. Chernikov kidx = tc->no.kidx; 2763b074b7bbSAlexander V. Chernikov 2764b074b7bbSAlexander V. Chernikov ipfw_objhash_add(ni, &tc->no); 27659f7d47b0SAlexander V. Chernikov 27669f7d47b0SAlexander V. Chernikov ti = KIDX_TO_TI(ch, kidx); 27679f7d47b0SAlexander V. Chernikov *ti = tc->ti; 2768b074b7bbSAlexander V. Chernikov 276968394ec8SAlexander V. Chernikov /* Notify algo on real @ti address */ 277068394ec8SAlexander V. Chernikov if (tc->ta->change_ti != NULL) 277168394ec8SAlexander V. Chernikov tc->ta->change_ti(tc->astate, ti); 277268394ec8SAlexander V. Chernikov 2773b074b7bbSAlexander V. Chernikov tc->linked = 1; 27749d099b4fSAlexander V. Chernikov tc->ta->refcnt++; 2775b074b7bbSAlexander V. Chernikov } 2776b074b7bbSAlexander V. Chernikov 2777b074b7bbSAlexander V. Chernikov /* 2778b074b7bbSAlexander V. Chernikov * Unlinks @tc from @chain table named instance. 2779b074b7bbSAlexander V. Chernikov * Zeroes states in @chain and stores them in @tc. 2780b074b7bbSAlexander V. Chernikov */ 2781b074b7bbSAlexander V. Chernikov static void 27829f7d47b0SAlexander V. Chernikov unlink_table(struct ip_fw_chain *ch, struct table_config *tc) 2783b074b7bbSAlexander V. Chernikov { 2784b074b7bbSAlexander V. Chernikov struct namedobj_instance *ni; 27859f7d47b0SAlexander V. Chernikov struct table_info *ti; 2786b074b7bbSAlexander V. Chernikov uint16_t kidx; 2787b074b7bbSAlexander V. Chernikov 27889f7d47b0SAlexander V. Chernikov IPFW_UH_WLOCK_ASSERT(ch); 27899f7d47b0SAlexander V. Chernikov IPFW_WLOCK_ASSERT(ch); 2790b074b7bbSAlexander V. Chernikov 27919f7d47b0SAlexander V. Chernikov ni = CHAIN_TO_NI(ch); 2792b074b7bbSAlexander V. Chernikov kidx = tc->no.kidx; 2793b074b7bbSAlexander V. Chernikov 27949f7d47b0SAlexander V. Chernikov /* Clear state. @ti copy is already saved inside @tc */ 2795b074b7bbSAlexander V. Chernikov ipfw_objhash_del(ni, &tc->no); 27969f7d47b0SAlexander V. Chernikov ti = KIDX_TO_TI(ch, kidx); 27979f7d47b0SAlexander V. Chernikov memset(ti, 0, sizeof(struct table_info)); 2798b074b7bbSAlexander V. Chernikov tc->linked = 0; 27999d099b4fSAlexander V. Chernikov tc->ta->refcnt--; 280068394ec8SAlexander V. Chernikov 280168394ec8SAlexander V. Chernikov /* Notify algo on real @ti address */ 280268394ec8SAlexander V. Chernikov if (tc->ta->change_ti != NULL) 280368394ec8SAlexander V. Chernikov tc->ta->change_ti(tc->astate, NULL); 2804b074b7bbSAlexander V. Chernikov } 2805b074b7bbSAlexander V. Chernikov 2806a73d728dSAlexander V. Chernikov struct swap_table_args { 2807a73d728dSAlexander V. Chernikov int set; 2808a73d728dSAlexander V. Chernikov int new_set; 2809a73d728dSAlexander V. Chernikov int mv; 2810a73d728dSAlexander V. Chernikov }; 2811a73d728dSAlexander V. Chernikov 2812a73d728dSAlexander V. Chernikov /* 2813a73d728dSAlexander V. Chernikov * Change set for each matching table. 2814a73d728dSAlexander V. Chernikov * 2815a73d728dSAlexander V. Chernikov * Ensure we dispatch each table once by setting/checking ochange 2816a73d728dSAlexander V. Chernikov * fields. 2817a73d728dSAlexander V. Chernikov */ 2818a73d728dSAlexander V. Chernikov static void 2819a73d728dSAlexander V. Chernikov swap_table_set(struct namedobj_instance *ni, struct named_object *no, 2820a73d728dSAlexander V. Chernikov void *arg) 2821a73d728dSAlexander V. Chernikov { 2822a73d728dSAlexander V. Chernikov struct table_config *tc; 2823a73d728dSAlexander V. Chernikov struct swap_table_args *sta; 2824a73d728dSAlexander V. Chernikov 2825a73d728dSAlexander V. Chernikov tc = (struct table_config *)no; 2826a73d728dSAlexander V. Chernikov sta = (struct swap_table_args *)arg; 2827a73d728dSAlexander V. Chernikov 2828a73d728dSAlexander V. Chernikov if (no->set != sta->set && (no->set != sta->new_set || sta->mv != 0)) 2829a73d728dSAlexander V. Chernikov return; 2830a73d728dSAlexander V. Chernikov 2831a73d728dSAlexander V. Chernikov if (tc->ochanged != 0) 2832a73d728dSAlexander V. Chernikov return; 2833a73d728dSAlexander V. Chernikov 2834a73d728dSAlexander V. Chernikov tc->ochanged = 1; 2835a73d728dSAlexander V. Chernikov ipfw_objhash_del(ni, no); 2836a73d728dSAlexander V. Chernikov if (no->set == sta->set) 2837a73d728dSAlexander V. Chernikov no->set = sta->new_set; 2838a73d728dSAlexander V. Chernikov else 2839a73d728dSAlexander V. Chernikov no->set = sta->set; 2840a73d728dSAlexander V. Chernikov ipfw_objhash_add(ni, no); 2841a73d728dSAlexander V. Chernikov } 2842a73d728dSAlexander V. Chernikov 2843a73d728dSAlexander V. Chernikov /* 2844a73d728dSAlexander V. Chernikov * Cleans up ochange field for all tables. 2845a73d728dSAlexander V. Chernikov */ 2846a73d728dSAlexander V. Chernikov static void 2847a73d728dSAlexander V. Chernikov clean_table_set_data(struct namedobj_instance *ni, struct named_object *no, 2848a73d728dSAlexander V. Chernikov void *arg) 2849a73d728dSAlexander V. Chernikov { 2850a73d728dSAlexander V. Chernikov struct table_config *tc; 2851a73d728dSAlexander V. Chernikov struct swap_table_args *sta; 2852a73d728dSAlexander V. Chernikov 2853a73d728dSAlexander V. Chernikov tc = (struct table_config *)no; 2854a73d728dSAlexander V. Chernikov sta = (struct swap_table_args *)arg; 2855a73d728dSAlexander V. Chernikov 2856a73d728dSAlexander V. Chernikov tc->ochanged = 0; 2857a73d728dSAlexander V. Chernikov } 2858a73d728dSAlexander V. Chernikov 2859a73d728dSAlexander V. Chernikov /* 2860a73d728dSAlexander V. Chernikov * Swaps tables within two sets. 2861a73d728dSAlexander V. Chernikov */ 2862a73d728dSAlexander V. Chernikov void 2863a73d728dSAlexander V. Chernikov ipfw_swap_tables_sets(struct ip_fw_chain *ch, uint32_t set, 2864a73d728dSAlexander V. Chernikov uint32_t new_set, int mv) 2865a73d728dSAlexander V. Chernikov { 2866a73d728dSAlexander V. Chernikov struct swap_table_args sta; 2867a73d728dSAlexander V. Chernikov 2868a73d728dSAlexander V. Chernikov IPFW_UH_WLOCK_ASSERT(ch); 2869a73d728dSAlexander V. Chernikov 2870a73d728dSAlexander V. Chernikov sta.set = set; 2871a73d728dSAlexander V. Chernikov sta.new_set = new_set; 2872a73d728dSAlexander V. Chernikov sta.mv = mv; 2873a73d728dSAlexander V. Chernikov 2874a73d728dSAlexander V. Chernikov ipfw_objhash_foreach(CHAIN_TO_NI(ch), swap_table_set, &sta); 2875a73d728dSAlexander V. Chernikov ipfw_objhash_foreach(CHAIN_TO_NI(ch), clean_table_set_data, &sta); 2876a73d728dSAlexander V. Chernikov } 2877a73d728dSAlexander V. Chernikov 2878a73d728dSAlexander V. Chernikov /* 2879a73d728dSAlexander V. Chernikov * Move all tables which are reference by rules in @rr to set @new_set. 2880a73d728dSAlexander V. Chernikov * Makes sure that all relevant tables are referenced ONLLY by given rules. 2881a73d728dSAlexander V. Chernikov * 2882a73d728dSAlexander V. Chernikov * Retuns 0 on success, 2883a73d728dSAlexander V. Chernikov */ 2884a73d728dSAlexander V. Chernikov int 2885a73d728dSAlexander V. Chernikov ipfw_move_tables_sets(struct ip_fw_chain *ch, ipfw_range_tlv *rt, 2886a73d728dSAlexander V. Chernikov uint32_t new_set) 2887a73d728dSAlexander V. Chernikov { 2888a73d728dSAlexander V. Chernikov struct ip_fw *rule; 2889a73d728dSAlexander V. Chernikov struct table_config *tc; 2890a73d728dSAlexander V. Chernikov struct named_object *no; 2891a73d728dSAlexander V. Chernikov struct namedobj_instance *ni; 2892a73d728dSAlexander V. Chernikov int bad, i, l, cmdlen; 2893a73d728dSAlexander V. Chernikov uint16_t kidx; 2894a73d728dSAlexander V. Chernikov uint8_t type; 2895a73d728dSAlexander V. Chernikov ipfw_insn *cmd; 2896a73d728dSAlexander V. Chernikov 2897a73d728dSAlexander V. Chernikov IPFW_UH_WLOCK_ASSERT(ch); 2898a73d728dSAlexander V. Chernikov 2899a73d728dSAlexander V. Chernikov ni = CHAIN_TO_NI(ch); 2900a73d728dSAlexander V. Chernikov 2901a73d728dSAlexander V. Chernikov /* Stage 1: count number of references by given rules */ 2902a73d728dSAlexander V. Chernikov for (i = 0; i < ch->n_rules - 1; i++) { 2903a73d728dSAlexander V. Chernikov rule = ch->map[i]; 2904a73d728dSAlexander V. Chernikov if (ipfw_match_range(rule, rt) == 0) 2905a73d728dSAlexander V. Chernikov continue; 2906a73d728dSAlexander V. Chernikov 2907a73d728dSAlexander V. Chernikov l = rule->cmd_len; 2908a73d728dSAlexander V. Chernikov cmd = rule->cmd; 2909a73d728dSAlexander V. Chernikov cmdlen = 0; 2910a73d728dSAlexander V. Chernikov for ( ; l > 0 ; l -= cmdlen, cmd += cmdlen) { 2911a73d728dSAlexander V. Chernikov cmdlen = F_LEN(cmd); 2912a73d728dSAlexander V. Chernikov if (classify_table_opcode(cmd, &kidx, &type) != 0) 2913a73d728dSAlexander V. Chernikov continue; 2914a73d728dSAlexander V. Chernikov no = ipfw_objhash_lookup_kidx(ni, kidx); 2915a73d728dSAlexander V. Chernikov KASSERT(no != NULL, 2916a73d728dSAlexander V. Chernikov ("objhash lookup failed on index %d", kidx)); 2917a73d728dSAlexander V. Chernikov tc = (struct table_config *)no; 2918a73d728dSAlexander V. Chernikov tc->ocount++; 2919a73d728dSAlexander V. Chernikov } 2920a73d728dSAlexander V. Chernikov 2921a73d728dSAlexander V. Chernikov } 2922a73d728dSAlexander V. Chernikov 2923a73d728dSAlexander V. Chernikov /* Stage 2: verify "ownership" */ 2924a73d728dSAlexander V. Chernikov bad = 0; 2925a73d728dSAlexander V. Chernikov for (i = 0; i < ch->n_rules - 1; i++) { 2926a73d728dSAlexander V. Chernikov rule = ch->map[i]; 2927a73d728dSAlexander V. Chernikov if (ipfw_match_range(rule, rt) == 0) 2928a73d728dSAlexander V. Chernikov continue; 2929a73d728dSAlexander V. Chernikov 2930a73d728dSAlexander V. Chernikov l = rule->cmd_len; 2931a73d728dSAlexander V. Chernikov cmd = rule->cmd; 2932a73d728dSAlexander V. Chernikov cmdlen = 0; 2933a73d728dSAlexander V. Chernikov for ( ; l > 0 ; l -= cmdlen, cmd += cmdlen) { 2934a73d728dSAlexander V. Chernikov cmdlen = F_LEN(cmd); 2935a73d728dSAlexander V. Chernikov if (classify_table_opcode(cmd, &kidx, &type) != 0) 2936a73d728dSAlexander V. Chernikov continue; 2937a73d728dSAlexander V. Chernikov no = ipfw_objhash_lookup_kidx(ni, kidx); 2938a73d728dSAlexander V. Chernikov KASSERT(no != NULL, 2939a73d728dSAlexander V. Chernikov ("objhash lookup failed on index %d", kidx)); 2940a73d728dSAlexander V. Chernikov tc = (struct table_config *)no; 2941a73d728dSAlexander V. Chernikov if (tc->no.refcnt != tc->ocount) { 2942a73d728dSAlexander V. Chernikov 2943a73d728dSAlexander V. Chernikov /* 2944a73d728dSAlexander V. Chernikov * Number of references differ: 2945a73d728dSAlexander V. Chernikov * Other rule(s) are holding reference to given 2946a73d728dSAlexander V. Chernikov * table, so it is not possible to change its set. 2947a73d728dSAlexander V. Chernikov * 2948a73d728dSAlexander V. Chernikov * Note that refcnt may account 2949a73d728dSAlexander V. Chernikov * references to some going-to-be-added rules. 2950a73d728dSAlexander V. Chernikov * Since we don't know their numbers (and event 2951a73d728dSAlexander V. Chernikov * if they will be added) it is perfectly OK 2952a73d728dSAlexander V. Chernikov * to return error here. 2953a73d728dSAlexander V. Chernikov */ 2954a73d728dSAlexander V. Chernikov bad = 1; 2955a73d728dSAlexander V. Chernikov break; 2956a73d728dSAlexander V. Chernikov } 2957a73d728dSAlexander V. Chernikov } 2958a73d728dSAlexander V. Chernikov 2959a73d728dSAlexander V. Chernikov if (bad != 0) 2960a73d728dSAlexander V. Chernikov break; 2961a73d728dSAlexander V. Chernikov } 2962a73d728dSAlexander V. Chernikov 2963a73d728dSAlexander V. Chernikov /* Stage 3: change set or cleanup */ 2964a73d728dSAlexander V. Chernikov for (i = 0; i < ch->n_rules - 1; i++) { 2965a73d728dSAlexander V. Chernikov rule = ch->map[i]; 2966a73d728dSAlexander V. Chernikov if (ipfw_match_range(rule, rt) == 0) 2967a73d728dSAlexander V. Chernikov continue; 2968a73d728dSAlexander V. Chernikov 2969a73d728dSAlexander V. Chernikov l = rule->cmd_len; 2970a73d728dSAlexander V. Chernikov cmd = rule->cmd; 2971a73d728dSAlexander V. Chernikov cmdlen = 0; 2972a73d728dSAlexander V. Chernikov for ( ; l > 0 ; l -= cmdlen, cmd += cmdlen) { 2973a73d728dSAlexander V. Chernikov cmdlen = F_LEN(cmd); 2974a73d728dSAlexander V. Chernikov if (classify_table_opcode(cmd, &kidx, &type) != 0) 2975a73d728dSAlexander V. Chernikov continue; 2976a73d728dSAlexander V. Chernikov no = ipfw_objhash_lookup_kidx(ni, kidx); 2977a73d728dSAlexander V. Chernikov KASSERT(no != NULL, 2978a73d728dSAlexander V. Chernikov ("objhash lookup failed on index %d", kidx)); 2979a73d728dSAlexander V. Chernikov tc = (struct table_config *)no; 2980a73d728dSAlexander V. Chernikov 2981a73d728dSAlexander V. Chernikov tc->ocount = 0; 2982a73d728dSAlexander V. Chernikov if (bad != 0) 2983a73d728dSAlexander V. Chernikov continue; 2984a73d728dSAlexander V. Chernikov 2985a73d728dSAlexander V. Chernikov /* Actually change set. */ 2986a73d728dSAlexander V. Chernikov ipfw_objhash_del(ni, no); 2987a73d728dSAlexander V. Chernikov no->set = new_set; 2988a73d728dSAlexander V. Chernikov ipfw_objhash_add(ni, no); 2989a73d728dSAlexander V. Chernikov } 2990a73d728dSAlexander V. Chernikov } 2991a73d728dSAlexander V. Chernikov 2992a73d728dSAlexander V. Chernikov return (bad); 2993a73d728dSAlexander V. Chernikov } 2994a73d728dSAlexander V. Chernikov 2995b074b7bbSAlexander V. Chernikov /* 2996f99fbf96SAlexander V. Chernikov * Finds and bumps refcount for tables referenced by given @rule. 2997e5eec6ddSAlexander V. Chernikov * Auto-creates non-existing tables. 2998f99fbf96SAlexander V. Chernikov * Fills in @oib array with userland/kernel indexes. 2999f99fbf96SAlexander V. Chernikov * First free oidx pointer is saved back in @oib. 3000f99fbf96SAlexander V. Chernikov * 3001f99fbf96SAlexander V. Chernikov * Returns 0 on success. 3002f99fbf96SAlexander V. Chernikov */ 3003f99fbf96SAlexander V. Chernikov static int 3004e5eec6ddSAlexander V. Chernikov find_ref_rule_tables(struct ip_fw_chain *ch, struct ip_fw *rule, 3005f99fbf96SAlexander V. Chernikov struct rule_check_info *ci, struct obj_idx **oib, struct tid_info *ti) 3006f99fbf96SAlexander V. Chernikov { 3007f99fbf96SAlexander V. Chernikov struct table_config *tc; 3008f99fbf96SAlexander V. Chernikov struct namedobj_instance *ni; 3009f99fbf96SAlexander V. Chernikov struct named_object *no; 3010f99fbf96SAlexander V. Chernikov int cmdlen, error, l, numnew; 3011f99fbf96SAlexander V. Chernikov uint16_t kidx; 3012f99fbf96SAlexander V. Chernikov ipfw_insn *cmd; 3013f99fbf96SAlexander V. Chernikov struct obj_idx *pidx, *pidx_first, *p; 3014f99fbf96SAlexander V. Chernikov 3015f99fbf96SAlexander V. Chernikov pidx_first = *oib; 3016f99fbf96SAlexander V. Chernikov pidx = pidx_first; 3017f99fbf96SAlexander V. Chernikov l = rule->cmd_len; 3018f99fbf96SAlexander V. Chernikov cmd = rule->cmd; 3019f99fbf96SAlexander V. Chernikov cmdlen = 0; 3020f99fbf96SAlexander V. Chernikov error = 0; 3021f99fbf96SAlexander V. Chernikov numnew = 0; 3022f99fbf96SAlexander V. Chernikov 3023f99fbf96SAlexander V. Chernikov IPFW_UH_WLOCK(ch); 3024f99fbf96SAlexander V. Chernikov ni = CHAIN_TO_NI(ch); 3025f99fbf96SAlexander V. Chernikov 3026e5eec6ddSAlexander V. Chernikov /* Increase refcount on each existing referenced table. */ 3027f99fbf96SAlexander V. Chernikov for ( ; l > 0 ; l -= cmdlen, cmd += cmdlen) { 3028f99fbf96SAlexander V. Chernikov cmdlen = F_LEN(cmd); 3029f99fbf96SAlexander V. Chernikov 3030f99fbf96SAlexander V. Chernikov if (classify_table_opcode(cmd, &ti->uidx, &ti->type) != 0) 3031f99fbf96SAlexander V. Chernikov continue; 3032f99fbf96SAlexander V. Chernikov 3033f99fbf96SAlexander V. Chernikov pidx->uidx = ti->uidx; 3034f99fbf96SAlexander V. Chernikov pidx->type = ti->type; 3035f99fbf96SAlexander V. Chernikov 3036f99fbf96SAlexander V. Chernikov if ((tc = find_table(ni, ti)) != NULL) { 3037f99fbf96SAlexander V. Chernikov if (tc->no.type != ti->type) { 3038f99fbf96SAlexander V. Chernikov /* Incompatible types */ 3039f99fbf96SAlexander V. Chernikov error = EINVAL; 3040f99fbf96SAlexander V. Chernikov break; 3041f99fbf96SAlexander V. Chernikov } 3042f99fbf96SAlexander V. Chernikov 3043f99fbf96SAlexander V. Chernikov /* Reference found table and save kidx */ 3044f99fbf96SAlexander V. Chernikov tc->no.refcnt++; 3045f99fbf96SAlexander V. Chernikov pidx->kidx = tc->no.kidx; 3046f99fbf96SAlexander V. Chernikov pidx++; 3047f99fbf96SAlexander V. Chernikov continue; 3048f99fbf96SAlexander V. Chernikov } 3049f99fbf96SAlexander V. Chernikov 3050f99fbf96SAlexander V. Chernikov /* 3051f99fbf96SAlexander V. Chernikov * Compability stuff for old clients: 3052f99fbf96SAlexander V. Chernikov * prepare to manually create non-existing tables. 3053f99fbf96SAlexander V. Chernikov */ 3054f99fbf96SAlexander V. Chernikov pidx++; 3055f99fbf96SAlexander V. Chernikov numnew++; 3056f99fbf96SAlexander V. Chernikov } 3057f99fbf96SAlexander V. Chernikov 3058f99fbf96SAlexander V. Chernikov if (error != 0) { 3059f99fbf96SAlexander V. Chernikov /* Unref everything we have already done */ 3060f99fbf96SAlexander V. Chernikov for (p = *oib; p < pidx; p++) { 3061f99fbf96SAlexander V. Chernikov if (p->kidx == 0) 3062f99fbf96SAlexander V. Chernikov continue; 3063f99fbf96SAlexander V. Chernikov 3064f99fbf96SAlexander V. Chernikov /* Find & unref by existing idx */ 3065f99fbf96SAlexander V. Chernikov no = ipfw_objhash_lookup_kidx(ni, p->kidx); 3066f99fbf96SAlexander V. Chernikov KASSERT(no != NULL, ("Ref'd table %d disappeared", 3067f99fbf96SAlexander V. Chernikov p->kidx)); 3068f99fbf96SAlexander V. Chernikov 3069f99fbf96SAlexander V. Chernikov no->refcnt--; 3070f99fbf96SAlexander V. Chernikov } 3071f99fbf96SAlexander V. Chernikov } 3072f99fbf96SAlexander V. Chernikov 3073f99fbf96SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 3074f99fbf96SAlexander V. Chernikov 3075f99fbf96SAlexander V. Chernikov if (numnew == 0) { 3076f99fbf96SAlexander V. Chernikov *oib = pidx; 3077f99fbf96SAlexander V. Chernikov return (error); 3078f99fbf96SAlexander V. Chernikov } 3079f99fbf96SAlexander V. Chernikov 3080f99fbf96SAlexander V. Chernikov /* 3081f99fbf96SAlexander V. Chernikov * Compatibility stuff: do actual creation for non-existing, 3082f99fbf96SAlexander V. Chernikov * but referenced tables. 3083f99fbf96SAlexander V. Chernikov */ 3084f99fbf96SAlexander V. Chernikov for (p = pidx_first; p < pidx; p++) { 3085f99fbf96SAlexander V. Chernikov if (p->kidx != 0) 3086f99fbf96SAlexander V. Chernikov continue; 3087f99fbf96SAlexander V. Chernikov 3088f99fbf96SAlexander V. Chernikov ti->uidx = p->uidx; 3089f99fbf96SAlexander V. Chernikov ti->type = p->type; 3090f99fbf96SAlexander V. Chernikov ti->atype = 0; 3091f99fbf96SAlexander V. Chernikov 3092f99fbf96SAlexander V. Chernikov error = create_table_compat(ch, ti, NULL, NULL, &kidx); 3093f99fbf96SAlexander V. Chernikov if (error == 0) { 3094f99fbf96SAlexander V. Chernikov p->kidx = kidx; 3095f99fbf96SAlexander V. Chernikov continue; 3096f99fbf96SAlexander V. Chernikov } 3097f99fbf96SAlexander V. Chernikov 3098f99fbf96SAlexander V. Chernikov /* Error. We have to drop references */ 3099f99fbf96SAlexander V. Chernikov IPFW_UH_WLOCK(ch); 3100f99fbf96SAlexander V. Chernikov for (p = pidx_first; p < pidx; p++) { 3101f99fbf96SAlexander V. Chernikov if (p->kidx == 0) 3102f99fbf96SAlexander V. Chernikov continue; 3103f99fbf96SAlexander V. Chernikov 3104f99fbf96SAlexander V. Chernikov /* Find & unref by existing idx */ 3105f99fbf96SAlexander V. Chernikov no = ipfw_objhash_lookup_kidx(ni, p->kidx); 3106f99fbf96SAlexander V. Chernikov KASSERT(no != NULL, ("Ref'd table %d disappeared", 3107f99fbf96SAlexander V. Chernikov p->kidx)); 3108f99fbf96SAlexander V. Chernikov 3109f99fbf96SAlexander V. Chernikov no->refcnt--; 3110f99fbf96SAlexander V. Chernikov } 3111f99fbf96SAlexander V. Chernikov IPFW_UH_WUNLOCK(ch); 3112f99fbf96SAlexander V. Chernikov 3113f99fbf96SAlexander V. Chernikov return (error); 3114f99fbf96SAlexander V. Chernikov } 3115f99fbf96SAlexander V. Chernikov 3116f99fbf96SAlexander V. Chernikov *oib = pidx; 3117f99fbf96SAlexander V. Chernikov 3118f99fbf96SAlexander V. Chernikov return (error); 3119f99fbf96SAlexander V. Chernikov } 3120f99fbf96SAlexander V. Chernikov 3121f99fbf96SAlexander V. Chernikov /* 3122f99fbf96SAlexander V. Chernikov * Remove references from every table used in @rule. 3123f99fbf96SAlexander V. Chernikov */ 3124f99fbf96SAlexander V. Chernikov void 3125e5eec6ddSAlexander V. Chernikov ipfw_unref_rule_tables(struct ip_fw_chain *chain, struct ip_fw *rule) 3126f99fbf96SAlexander V. Chernikov { 3127f99fbf96SAlexander V. Chernikov int cmdlen, l; 3128f99fbf96SAlexander V. Chernikov ipfw_insn *cmd; 3129f99fbf96SAlexander V. Chernikov struct namedobj_instance *ni; 3130f99fbf96SAlexander V. Chernikov struct named_object *no; 3131f99fbf96SAlexander V. Chernikov uint16_t kidx; 3132f99fbf96SAlexander V. Chernikov uint8_t type; 3133f99fbf96SAlexander V. Chernikov 3134f99fbf96SAlexander V. Chernikov IPFW_UH_WLOCK_ASSERT(chain); 3135f99fbf96SAlexander V. Chernikov ni = CHAIN_TO_NI(chain); 3136f99fbf96SAlexander V. Chernikov 3137f99fbf96SAlexander V. Chernikov l = rule->cmd_len; 3138f99fbf96SAlexander V. Chernikov cmd = rule->cmd; 3139f99fbf96SAlexander V. Chernikov cmdlen = 0; 3140f99fbf96SAlexander V. Chernikov for ( ; l > 0 ; l -= cmdlen, cmd += cmdlen) { 3141f99fbf96SAlexander V. Chernikov cmdlen = F_LEN(cmd); 3142f99fbf96SAlexander V. Chernikov 3143f99fbf96SAlexander V. Chernikov if (classify_table_opcode(cmd, &kidx, &type) != 0) 3144f99fbf96SAlexander V. Chernikov continue; 3145f99fbf96SAlexander V. Chernikov 3146f99fbf96SAlexander V. Chernikov no = ipfw_objhash_lookup_kidx(ni, kidx); 3147f99fbf96SAlexander V. Chernikov 3148f99fbf96SAlexander V. Chernikov KASSERT(no != NULL, ("table id %d not found", kidx)); 3149f99fbf96SAlexander V. Chernikov KASSERT(no->type == type, ("wrong type %d (%d) for table id %d", 3150f99fbf96SAlexander V. Chernikov no->type, type, kidx)); 3151f99fbf96SAlexander V. Chernikov KASSERT(no->refcnt > 0, ("refcount for table %d is %d", 3152f99fbf96SAlexander V. Chernikov kidx, no->refcnt)); 3153f99fbf96SAlexander V. Chernikov 3154f99fbf96SAlexander V. Chernikov no->refcnt--; 3155f99fbf96SAlexander V. Chernikov } 3156f99fbf96SAlexander V. Chernikov } 3157f99fbf96SAlexander V. Chernikov 3158f99fbf96SAlexander V. Chernikov /* 3159b074b7bbSAlexander V. Chernikov * Compatibility function for old ipfw(8) binaries. 3160b074b7bbSAlexander V. Chernikov * Rewrites table kernel indices with userland ones. 316135e1bbd0SAlexander V. Chernikov * Convert tables matching '/^\d+$/' to their atoi() value. 316235e1bbd0SAlexander V. Chernikov * Use number 65535 for other tables. 3163b074b7bbSAlexander V. Chernikov * 3164b074b7bbSAlexander V. Chernikov * Returns 0 on success. 3165b074b7bbSAlexander V. Chernikov */ 3166b074b7bbSAlexander V. Chernikov int 31677e767c79SAlexander V. Chernikov ipfw_rewrite_table_kidx(struct ip_fw_chain *chain, struct ip_fw_rule0 *rule) 3168b074b7bbSAlexander V. Chernikov { 31691832a7b3SAlexander V. Chernikov int cmdlen, error, l; 3170b074b7bbSAlexander V. Chernikov ipfw_insn *cmd; 31711832a7b3SAlexander V. Chernikov uint16_t kidx, uidx; 3172b074b7bbSAlexander V. Chernikov uint8_t type; 3173b074b7bbSAlexander V. Chernikov struct named_object *no; 3174b074b7bbSAlexander V. Chernikov struct namedobj_instance *ni; 3175b074b7bbSAlexander V. Chernikov 3176b074b7bbSAlexander V. Chernikov ni = CHAIN_TO_NI(chain); 31771832a7b3SAlexander V. Chernikov error = 0; 3178b074b7bbSAlexander V. Chernikov 3179b074b7bbSAlexander V. Chernikov l = rule->cmd_len; 3180b074b7bbSAlexander V. Chernikov cmd = rule->cmd; 3181b074b7bbSAlexander V. Chernikov cmdlen = 0; 3182b074b7bbSAlexander V. Chernikov for ( ; l > 0 ; l -= cmdlen, cmd += cmdlen) { 3183b074b7bbSAlexander V. Chernikov cmdlen = F_LEN(cmd); 3184b074b7bbSAlexander V. Chernikov 3185b074b7bbSAlexander V. Chernikov if (classify_table_opcode(cmd, &kidx, &type) != 0) 3186b074b7bbSAlexander V. Chernikov continue; 3187b074b7bbSAlexander V. Chernikov 3188ac35ff17SAlexander V. Chernikov if ((no = ipfw_objhash_lookup_kidx(ni, kidx)) == NULL) 3189b074b7bbSAlexander V. Chernikov return (1); 3190b074b7bbSAlexander V. Chernikov 31911832a7b3SAlexander V. Chernikov uidx = no->uidx; 31921832a7b3SAlexander V. Chernikov if (no->compat == 0) { 3193b074b7bbSAlexander V. Chernikov 31941832a7b3SAlexander V. Chernikov /* 31951832a7b3SAlexander V. Chernikov * We are called via legacy opcode. 31961832a7b3SAlexander V. Chernikov * Save error and show table as fake number 31971832a7b3SAlexander V. Chernikov * not to make ipfw(8) hang. 31981832a7b3SAlexander V. Chernikov */ 31991832a7b3SAlexander V. Chernikov uidx = 65535; 32001832a7b3SAlexander V. Chernikov error = 2; 3201b074b7bbSAlexander V. Chernikov } 3202b074b7bbSAlexander V. Chernikov 32031832a7b3SAlexander V. Chernikov update_table_opcode(cmd, uidx); 32041832a7b3SAlexander V. Chernikov } 32051832a7b3SAlexander V. Chernikov 32061832a7b3SAlexander V. Chernikov return (error); 3207b074b7bbSAlexander V. Chernikov } 3208b074b7bbSAlexander V. Chernikov 3209563b5ab1SAlexander V. Chernikov /* 3210b074b7bbSAlexander V. Chernikov * Checks is opcode is referencing table of appropriate type. 3211b074b7bbSAlexander V. Chernikov * Adds reference count for found table if true. 3212b074b7bbSAlexander V. Chernikov * Rewrites user-supplied opcode values with kernel ones. 3213b074b7bbSAlexander V. Chernikov * 3214b074b7bbSAlexander V. Chernikov * Returns 0 on success and appropriate error code otherwise. 3215b074b7bbSAlexander V. Chernikov */ 3216b074b7bbSAlexander V. Chernikov int 3217b074b7bbSAlexander V. Chernikov ipfw_rewrite_table_uidx(struct ip_fw_chain *chain, 3218b074b7bbSAlexander V. Chernikov struct rule_check_info *ci) 3219b074b7bbSAlexander V. Chernikov { 32200468c5baSAlexander V. Chernikov int cmdlen, error, l; 3221b074b7bbSAlexander V. Chernikov ipfw_insn *cmd; 3222b074b7bbSAlexander V. Chernikov uint16_t uidx; 3223b074b7bbSAlexander V. Chernikov uint8_t type; 3224b074b7bbSAlexander V. Chernikov struct namedobj_instance *ni; 32259490a627SAlexander V. Chernikov struct obj_idx *p, *pidx_first, *pidx_last; 3226b074b7bbSAlexander V. Chernikov struct tid_info ti; 3227b074b7bbSAlexander V. Chernikov 3228b074b7bbSAlexander V. Chernikov ni = CHAIN_TO_NI(chain); 3229b074b7bbSAlexander V. Chernikov 3230b074b7bbSAlexander V. Chernikov /* 3231b074b7bbSAlexander V. Chernikov * Prepare an array for storing opcode indices. 3232b074b7bbSAlexander V. Chernikov * Use stack allocation by default. 3233b074b7bbSAlexander V. Chernikov */ 3234b074b7bbSAlexander V. Chernikov if (ci->table_opcodes <= (sizeof(ci->obuf)/sizeof(ci->obuf[0]))) { 3235b074b7bbSAlexander V. Chernikov /* Stack */ 32369490a627SAlexander V. Chernikov pidx_first = ci->obuf; 3237b074b7bbSAlexander V. Chernikov } else 32389490a627SAlexander V. Chernikov pidx_first = malloc(ci->table_opcodes * sizeof(struct obj_idx), 3239b074b7bbSAlexander V. Chernikov M_IPFW, M_WAITOK | M_ZERO); 3240b074b7bbSAlexander V. Chernikov 32419490a627SAlexander V. Chernikov pidx_last = pidx_first; 3242b074b7bbSAlexander V. Chernikov error = 0; 3243b074b7bbSAlexander V. Chernikov type = 0; 3244b074b7bbSAlexander V. Chernikov memset(&ti, 0, sizeof(ti)); 32451832a7b3SAlexander V. Chernikov 32461832a7b3SAlexander V. Chernikov /* 32471832a7b3SAlexander V. Chernikov * Use default set for looking up tables (old way) or 32481832a7b3SAlexander V. Chernikov * use set rule is assigned to (new way). 32491832a7b3SAlexander V. Chernikov */ 32501832a7b3SAlexander V. Chernikov ti.set = (V_fw_tables_sets != 0) ? ci->krule->set : 0; 32516c2997ffSAlexander V. Chernikov if (ci->ctlv != NULL) { 32526c2997ffSAlexander V. Chernikov ti.tlvs = (void *)(ci->ctlv + 1); 32536c2997ffSAlexander V. Chernikov ti.tlen = ci->ctlv->head.length - sizeof(ipfw_obj_ctlv); 32546c2997ffSAlexander V. Chernikov } 3255b074b7bbSAlexander V. Chernikov 32560468c5baSAlexander V. Chernikov /* Reference all used tables */ 3257e5eec6ddSAlexander V. Chernikov error = find_ref_rule_tables(chain, ci->krule, ci, &pidx_last, &ti); 32580468c5baSAlexander V. Chernikov if (error != 0) 32599f7d47b0SAlexander V. Chernikov goto free; 3260b074b7bbSAlexander V. Chernikov 32619f7d47b0SAlexander V. Chernikov IPFW_UH_WLOCK(chain); 32629f7d47b0SAlexander V. Chernikov 3263b074b7bbSAlexander V. Chernikov /* Perform rule rewrite */ 3264b074b7bbSAlexander V. Chernikov l = ci->krule->cmd_len; 3265b074b7bbSAlexander V. Chernikov cmd = ci->krule->cmd; 3266b074b7bbSAlexander V. Chernikov cmdlen = 0; 32679490a627SAlexander V. Chernikov p = pidx_first; 3268b074b7bbSAlexander V. Chernikov for ( ; l > 0 ; l -= cmdlen, cmd += cmdlen) { 3269b074b7bbSAlexander V. Chernikov cmdlen = F_LEN(cmd); 3270b074b7bbSAlexander V. Chernikov if (classify_table_opcode(cmd, &uidx, &type) != 0) 3271b074b7bbSAlexander V. Chernikov continue; 32729490a627SAlexander V. Chernikov update_table_opcode(cmd, p->kidx); 32739490a627SAlexander V. Chernikov p++; 3274b074b7bbSAlexander V. Chernikov } 3275b074b7bbSAlexander V. Chernikov 3276b074b7bbSAlexander V. Chernikov IPFW_UH_WUNLOCK(chain); 3277b074b7bbSAlexander V. Chernikov 3278b074b7bbSAlexander V. Chernikov free: 32799490a627SAlexander V. Chernikov if (pidx_first != ci->obuf) 32809490a627SAlexander V. Chernikov free(pidx_first, M_IPFW); 3281b074b7bbSAlexander V. Chernikov 3282b074b7bbSAlexander V. Chernikov return (error); 3283b074b7bbSAlexander V. Chernikov } 3284b074b7bbSAlexander V. Chernikov 3285