1 /*- 2 * Copyright (c) 2002-2009 Luigi Rizzo, Universita` di Pisa 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 * 25 * $FreeBSD$ 26 */ 27 28 #ifndef _IPFW2_TABLE_H 29 #define _IPFW2_TABLE_H 30 31 /* 32 * Internal constants and data structures used by ipfw tables 33 * not meant to be exported outside the kernel. 34 */ 35 #ifdef _KERNEL 36 37 struct table_algo; 38 struct tables_config { 39 struct namedobj_instance *namehash; 40 struct namedobj_instance *valhash; 41 uint32_t val_size; 42 uint32_t algo_count; 43 struct table_algo *algo[256]; 44 struct table_algo *def_algo[IPFW_TABLE_MAXTYPE + 1]; 45 TAILQ_HEAD(op_state_l,op_state) state_list; 46 }; 47 #define CHAIN_TO_TCFG(chain) ((struct tables_config *)(chain)->tblcfg) 48 49 struct table_info { 50 table_lookup_t *lookup; /* Lookup function */ 51 void *state; /* Lookup radix/other structure */ 52 void *xstate; /* eXtended state */ 53 u_long data; /* Hints for given func */ 54 }; 55 56 struct table_value; 57 struct tentry_info { 58 void *paddr; 59 struct table_value *pvalue; 60 void *ptv; /* Temporary field to hold obj */ 61 uint8_t masklen; /* mask length */ 62 uint8_t subtype; 63 uint16_t flags; /* record flags */ 64 uint32_t value; /* value index */ 65 }; 66 #define TEI_FLAGS_UPDATE 0x0001 /* Add or update rec if exists */ 67 #define TEI_FLAGS_UPDATED 0x0002 /* Entry has been updated */ 68 #define TEI_FLAGS_COMPAT 0x0004 /* Called from old ABI */ 69 #define TEI_FLAGS_DONTADD 0x0008 /* Do not create new rec */ 70 #define TEI_FLAGS_ADDED 0x0010 /* Entry was added */ 71 #define TEI_FLAGS_DELETED 0x0020 /* Entry was deleted */ 72 #define TEI_FLAGS_LIMIT 0x0040 /* Limit was hit */ 73 #define TEI_FLAGS_ERROR 0x0080 /* Unknown request error */ 74 #define TEI_FLAGS_NOTFOUND 0x0100 /* Entry was not found */ 75 #define TEI_FLAGS_EXISTS 0x0200 /* Entry already exists */ 76 77 typedef int (ta_init)(struct ip_fw_chain *ch, void **ta_state, 78 struct table_info *ti, char *data, uint8_t tflags); 79 typedef void (ta_destroy)(void *ta_state, struct table_info *ti); 80 typedef int (ta_prepare_add)(struct ip_fw_chain *ch, struct tentry_info *tei, 81 void *ta_buf); 82 typedef int (ta_prepare_del)(struct ip_fw_chain *ch, struct tentry_info *tei, 83 void *ta_buf); 84 typedef int (ta_add)(void *ta_state, struct table_info *ti, 85 struct tentry_info *tei, void *ta_buf, uint32_t *pnum); 86 typedef int (ta_del)(void *ta_state, struct table_info *ti, 87 struct tentry_info *tei, void *ta_buf, uint32_t *pnum); 88 typedef void (ta_flush_entry)(struct ip_fw_chain *ch, struct tentry_info *tei, 89 void *ta_buf); 90 91 typedef int (ta_need_modify)(void *ta_state, struct table_info *ti, 92 uint32_t count, uint64_t *pflags); 93 typedef int (ta_prepare_mod)(void *ta_buf, uint64_t *pflags); 94 typedef int (ta_fill_mod)(void *ta_state, struct table_info *ti, 95 void *ta_buf, uint64_t *pflags); 96 typedef void (ta_modify)(void *ta_state, struct table_info *ti, 97 void *ta_buf, uint64_t pflags); 98 typedef void (ta_flush_mod)(void *ta_buf); 99 100 typedef void (ta_change_ti)(void *ta_state, struct table_info *ti); 101 typedef void (ta_print_config)(void *ta_state, struct table_info *ti, char *buf, 102 size_t bufsize); 103 104 typedef int ta_foreach_f(void *node, void *arg); 105 typedef void ta_foreach(void *ta_state, struct table_info *ti, ta_foreach_f *f, 106 void *arg); 107 typedef int ta_dump_tentry(void *ta_state, struct table_info *ti, void *e, 108 ipfw_obj_tentry *tent); 109 typedef int ta_find_tentry(void *ta_state, struct table_info *ti, 110 ipfw_obj_tentry *tent); 111 typedef void ta_dump_tinfo(void *ta_state, struct table_info *ti, 112 ipfw_ta_tinfo *tinfo); 113 typedef uint32_t ta_get_count(void *ta_state, struct table_info *ti); 114 115 struct table_algo { 116 char name[16]; 117 uint32_t idx; 118 uint32_t type; 119 uint32_t refcnt; 120 uint32_t flags; 121 uint32_t vlimit; 122 size_t ta_buf_size; 123 ta_init *init; 124 ta_destroy *destroy; 125 ta_prepare_add *prepare_add; 126 ta_prepare_del *prepare_del; 127 ta_add *add; 128 ta_del *del; 129 ta_flush_entry *flush_entry; 130 ta_find_tentry *find_tentry; 131 ta_need_modify *need_modify; 132 ta_prepare_mod *prepare_mod; 133 ta_fill_mod *fill_mod; 134 ta_modify *modify; 135 ta_flush_mod *flush_mod; 136 ta_change_ti *change_ti; 137 ta_foreach *foreach; 138 ta_dump_tentry *dump_tentry; 139 ta_print_config *print_config; 140 ta_dump_tinfo *dump_tinfo; 141 ta_get_count *get_count; 142 }; 143 #define TA_FLAG_DEFAULT 0x01 /* Algo is default for given type */ 144 #define TA_FLAG_READONLY 0x02 /* Algo does not support modifications*/ 145 #define TA_FLAG_EXTCOUNTER 0x04 /* Algo has external counter available*/ 146 147 int ipfw_add_table_algo(struct ip_fw_chain *ch, struct table_algo *ta, 148 size_t size, int *idx); 149 void ipfw_del_table_algo(struct ip_fw_chain *ch, int idx); 150 151 void ipfw_table_algo_init(struct ip_fw_chain *chain); 152 void ipfw_table_algo_destroy(struct ip_fw_chain *chain); 153 154 MALLOC_DECLARE(M_IPFW_TBL); 155 /* Exported to support legacy opcodes */ 156 int add_table_entry(struct ip_fw_chain *ch, struct tid_info *ti, 157 struct tentry_info *tei, uint8_t flags, uint32_t count); 158 int del_table_entry(struct ip_fw_chain *ch, struct tid_info *ti, 159 struct tentry_info *tei, uint8_t flags, uint32_t count); 160 int flush_table(struct ip_fw_chain *ch, struct tid_info *ti); 161 void ipfw_import_table_value_legacy(uint32_t value, struct table_value *v); 162 uint32_t ipfw_export_table_value_legacy(struct table_value *v); 163 int ipfw_get_table_size(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 164 struct sockopt_data *sd); 165 166 /* ipfw_table_value.c functions */ 167 struct table_config; 168 struct tableop_state; 169 void ipfw_table_value_init(struct ip_fw_chain *ch, int first); 170 void ipfw_table_value_destroy(struct ip_fw_chain *ch, int last); 171 int ipfw_link_table_values(struct ip_fw_chain *ch, struct tableop_state *ts); 172 void ipfw_garbage_table_values(struct ip_fw_chain *ch, struct table_config *tc, 173 struct tentry_info *tei, uint32_t count, int rollback); 174 void ipfw_import_table_value_v1(ipfw_table_value *iv); 175 void ipfw_export_table_value_v1(struct table_value *v, ipfw_table_value *iv); 176 void ipfw_unref_table_values(struct ip_fw_chain *ch, struct table_config *tc, 177 struct table_algo *ta, void *astate, struct table_info *ti); 178 void rollback_table_values(struct tableop_state *ts); 179 180 int ipfw_rewrite_table_uidx(struct ip_fw_chain *chain, 181 struct rule_check_info *ci); 182 int ipfw_mark_table_kidx(struct ip_fw_chain *chain, struct ip_fw *rule, 183 uint32_t *bmask); 184 int ipfw_export_table_ntlv(struct ip_fw_chain *ch, uint16_t kidx, 185 struct sockopt_data *sd); 186 void ipfw_unref_rule_tables(struct ip_fw_chain *chain, struct ip_fw *rule); 187 struct namedobj_instance *ipfw_get_table_objhash(struct ip_fw_chain *ch); 188 189 /* utility functions */ 190 int ipfw_move_tables_sets(struct ip_fw_chain *ch, ipfw_range_tlv *rt, 191 uint32_t new_set); 192 void ipfw_swap_tables_sets(struct ip_fw_chain *ch, uint32_t old_set, 193 uint32_t new_set, int mv); 194 int ipfw_foreach_table_tentry(struct ip_fw_chain *ch, uint16_t kidx, 195 ta_foreach_f f, void *arg); 196 197 /* internal functions */ 198 void tc_ref(struct table_config *tc); 199 void tc_unref(struct table_config *tc); 200 201 struct op_state; 202 typedef void (op_rollback_f)(void *object, struct op_state *state); 203 struct op_state { 204 TAILQ_ENTRY(op_state) next; /* chain link */ 205 op_rollback_f *func; 206 }; 207 208 struct tableop_state { 209 struct op_state opstate; 210 struct ip_fw_chain *ch; 211 struct table_config *tc; 212 struct table_algo *ta; 213 struct tentry_info *tei; 214 uint32_t count; 215 uint32_t vmask; 216 int vshared; 217 int modified; 218 }; 219 220 void add_toperation_state(struct ip_fw_chain *ch, struct tableop_state *ts); 221 void del_toperation_state(struct ip_fw_chain *ch, struct tableop_state *ts); 222 void rollback_toperation_state(struct ip_fw_chain *ch, void *object); 223 224 /* Legacy interfaces */ 225 int ipfw_count_table(struct ip_fw_chain *ch, struct tid_info *ti, 226 uint32_t *cnt); 227 int ipfw_count_xtable(struct ip_fw_chain *ch, struct tid_info *ti, 228 uint32_t *cnt); 229 int ipfw_dump_table_legacy(struct ip_fw_chain *ch, struct tid_info *ti, 230 ipfw_table *tbl); 231 232 233 #endif /* _KERNEL */ 234 #endif /* _IPFW2_TABLE_H */ 235