1 /* 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)uipc_domain.c 8.2 (Berkeley) 10/18/93 34 * $FreeBSD: src/sys/kern/uipc_domain.c,v 1.22.2.1 2001/07/03 11:01:37 ume Exp $ 35 * $DragonFly: src/sys/kern/uipc_domain.c,v 1.9 2005/06/06 15:02:28 dillon Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/socket.h> 40 #include <sys/protosw.h> 41 #include <sys/domain.h> 42 #include <sys/mbuf.h> 43 #include <sys/kernel.h> 44 #include <sys/socketvar.h> 45 #include <sys/systm.h> 46 #include <vm/vm_zone.h> 47 48 #include <sys/thread2.h> 49 50 /* 51 * System initialization 52 * 53 * Note: domain initialization wants to take place on a per domain basis 54 * as a result of traversing a linker set. Most likely, each domain 55 * want to call a registration function rather than being handled here 56 * in domaininit(). Probably this will look like: 57 * 58 * SYSINIT(unique, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY, domain_add, xxx) 59 * 60 * Where 'xxx' is replaced by the address of a parameter struct to be 61 * passed to the doamin_add() function. 62 */ 63 64 static void domaininit (void *); 65 SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL) 66 67 static void pffasttimo (void *); 68 static void pfslowtimo (void *); 69 70 struct domainlist domains; 71 72 static struct callout pffasttimo_ch; 73 static struct callout pfslowtimo_ch; 74 75 /* 76 * Add a new protocol domain to the list of supported domains 77 * Note: you cant unload it again because a socket may be using it. 78 * XXX can't fail at this time. 79 */ 80 static void 81 net_init_domain(struct domain *dp) 82 { 83 struct protosw *pr; 84 85 crit_enter(); 86 if (dp->dom_init) 87 (*dp->dom_init)(); 88 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { 89 if (pr->pr_usrreqs == NULL) 90 panic("domaininit: %ssw[%d] has no usrreqs!", 91 dp->dom_name, pr - dp->dom_protosw); 92 if (pr->pr_init) 93 (*pr->pr_init)(); 94 } 95 /* 96 * update global information about maximums 97 */ 98 max_hdr = max_linkhdr + max_protohdr; 99 max_datalen = MHLEN - max_hdr; 100 crit_exit(); 101 } 102 103 /* 104 * Add a new protocol domain to the list of supported domains 105 * Note: you cant unload it again because a socket may be using it. 106 * XXX can't fail at this time. 107 */ 108 void 109 net_add_domain(void *data) 110 { 111 struct domain *dp = data; 112 113 crit_enter(); 114 SLIST_INSERT_HEAD(&domains, dp, dom_next); 115 crit_exit(); 116 net_init_domain(dp); 117 } 118 119 /* ARGSUSED*/ 120 static void 121 domaininit(void *dummy) 122 { 123 /* 124 * Before we do any setup, make sure to initialize the 125 * zone allocator we get struct sockets from. The obvious 126 * maximum number of sockets is `maxfiles', but it is possible 127 * to have a socket without an open file (e.g., a connection waiting 128 * to be accept(2)ed). Rather than think up and define a 129 * better value, we just use nmbclusters, since that's what people 130 * are told to increase first when the network runs out of memory. 131 * Perhaps we should have two pools, one of unlimited size 132 * for use during socreate(), and one ZONE_INTERRUPT pool for 133 * use in sonewconn(). 134 */ 135 socket_zone = zinit("socket", sizeof(struct socket), maxsockets, 136 ZONE_INTERRUPT, 0); 137 138 if (max_linkhdr < 16) /* XXX */ 139 max_linkhdr = 16; 140 141 callout_init(&pffasttimo_ch); 142 callout_init(&pfslowtimo_ch); 143 callout_reset(&pffasttimo_ch, 1, pffasttimo, NULL); 144 callout_reset(&pfslowtimo_ch, 1, pfslowtimo, NULL); 145 } 146 147 148 struct protosw * 149 pffindtype(int family, int type) 150 { 151 struct domain *dp; 152 struct protosw *pr; 153 154 SLIST_FOREACH(dp, &domains, dom_next) 155 if (dp->dom_family == family) 156 goto found; 157 return (NULL); 158 159 found: 160 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 161 if (pr->pr_type && pr->pr_type == type) 162 return (pr); 163 return (NULL); 164 } 165 166 struct protosw * 167 pffindproto(int family, int protocol, int type) 168 { 169 struct domain *dp; 170 struct protosw *pr; 171 struct protosw *maybe = NULL; 172 173 if (family == 0) 174 return (NULL); 175 SLIST_FOREACH(dp, &domains, dom_next) 176 if (dp->dom_family == family) 177 goto found; 178 return (NULL); 179 180 found: 181 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { 182 if ((pr->pr_protocol == protocol) && (pr->pr_type == type)) 183 return (pr); 184 185 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW && 186 pr->pr_protocol == 0 && maybe == (struct protosw *)NULL) 187 maybe = pr; 188 } 189 return (maybe); 190 } 191 192 void 193 pfctlinput(int cmd, struct sockaddr *sa) 194 { 195 struct domain *dp; 196 struct protosw *pr; 197 198 SLIST_FOREACH(dp, &domains, dom_next) 199 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 200 if (pr->pr_ctlinput) 201 (*pr->pr_ctlinput)(cmd, sa, (void *)NULL); 202 } 203 204 void 205 pfctlinput2(int cmd, struct sockaddr *sa, void *ctlparam) 206 { 207 struct domain *dp; 208 struct protosw *pr; 209 210 if (!sa) 211 return; 212 SLIST_FOREACH(dp, &domains, dom_next) { 213 /* 214 * the check must be made by xx_ctlinput() anyways, to 215 * make sure we use data item pointed to by ctlparam in 216 * correct way. the following check is made just for safety. 217 */ 218 if (dp->dom_family != sa->sa_family) 219 continue; 220 221 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 222 if (pr->pr_ctlinput) 223 (*pr->pr_ctlinput)(cmd, sa, ctlparam); 224 } 225 } 226 227 static void 228 pfslowtimo(void *arg) 229 { 230 struct domain *dp; 231 struct protosw *pr; 232 233 SLIST_FOREACH(dp, &domains, dom_next) 234 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 235 if (pr->pr_slowtimo) 236 (*pr->pr_slowtimo)(); 237 callout_reset(&pfslowtimo_ch, hz / 2, pfslowtimo, NULL); 238 } 239 240 static void 241 pffasttimo(void *arg) 242 { 243 struct domain *dp; 244 struct protosw *pr; 245 246 SLIST_FOREACH(dp, &domains, dom_next) 247 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 248 if (pr->pr_fasttimo) 249 (*pr->pr_fasttimo)(); 250 callout_reset(&pffasttimo_ch, hz / 5, pffasttimo, NULL); 251 } 252