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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)uipc_domain.c 8.2 (Berkeley) 10/18/93 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/socket.h> 37 #include <sys/protosw.h> 38 #include <sys/domain.h> 39 #include <sys/mbuf.h> 40 #include <sys/kernel.h> 41 #include <sys/lock.h> 42 #include <sys/mutex.h> 43 #include <sys/socketvar.h> 44 #include <sys/systm.h> 45 #include <vm/uma.h> 46 47 /* 48 * System initialization 49 * 50 * Note: domain initialization takes place on a per domain basis 51 * as a result of traversing a SYSINIT linker set. Most likely, 52 * each domain would want to call DOMAIN_SET(9) itself, which 53 * would cause the domain to be added just after domaininit() 54 * is called during startup. 55 * 56 * See DOMAIN_SET(9) for details on its use. 57 */ 58 59 static void domaininit(void *); 60 SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL) 61 62 static struct callout pffast_callout; 63 static struct callout pfslow_callout; 64 65 static void pffasttimo(void *); 66 static void pfslowtimo(void *); 67 68 struct domain *domains; /* registered protocol domains */ 69 struct mtx dom_mtx; /* domain list lock */ 70 MTX_SYSINIT(domain, &dom_mtx, "domain list", MTX_DEF); 71 72 /* 73 * Add a new protocol domain to the list of supported domains 74 * Note: you cant unload it again because a socket may be using it. 75 * XXX can't fail at this time. 76 */ 77 static void 78 net_init_domain(struct domain *dp) 79 { 80 struct protosw *pr; 81 82 if (dp->dom_init) 83 (*dp->dom_init)(); 84 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++){ 85 if (pr->pr_usrreqs == 0) 86 panic("domaininit: %ssw[%d] has no usrreqs!", 87 dp->dom_name, 88 (int)(pr - dp->dom_protosw)); 89 if (pr->pr_init) 90 (*pr->pr_init)(); 91 } 92 /* 93 * update global information about maximums 94 */ 95 max_hdr = max_linkhdr + max_protohdr; 96 max_datalen = MHLEN - max_hdr; 97 } 98 99 /* 100 * Add a new protocol domain to the list of supported domains 101 * Note: you cant unload it again because a socket may be using it. 102 * XXX can't fail at this time. 103 */ 104 void 105 net_add_domain(void *data) 106 { 107 struct domain *dp; 108 109 dp = (struct domain *)data; 110 mtx_lock(&dom_mtx); 111 dp->dom_next = domains; 112 domains = dp; 113 mtx_unlock(&dom_mtx); 114 net_init_domain(dp); 115 } 116 117 /* ARGSUSED*/ 118 static void 119 domaininit(void *dummy) 120 { 121 /* 122 * Before we do any setup, make sure to initialize the 123 * zone allocator we get struct sockets from. 124 */ 125 126 socket_zone = uma_zcreate("socket", sizeof(struct socket), NULL, NULL, 127 NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE); 128 uma_zone_set_max(socket_zone, maxsockets); 129 130 if (max_linkhdr < 16) /* XXX */ 131 max_linkhdr = 16; 132 133 if (debug_mpsafenet) { 134 callout_init(&pffast_callout, CALLOUT_MPSAFE); 135 callout_init(&pfslow_callout, CALLOUT_MPSAFE); 136 } else { 137 callout_init(&pffast_callout, 0); 138 callout_init(&pfslow_callout, 0); 139 } 140 141 callout_reset(&pffast_callout, 1, pffasttimo, NULL); 142 callout_reset(&pfslow_callout, 1, pfslowtimo, NULL); 143 } 144 145 146 struct protosw * 147 pffindtype(family, type) 148 int family; 149 int type; 150 { 151 register struct domain *dp; 152 register struct protosw *pr; 153 154 for (dp = domains; dp; dp = dp->dom_next) 155 if (dp->dom_family == family) 156 goto found; 157 return (0); 158 found: 159 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 160 if (pr->pr_type && pr->pr_type == type) 161 return (pr); 162 return (0); 163 } 164 165 struct protosw * 166 pffindproto(family, protocol, type) 167 int family; 168 int protocol; 169 int type; 170 { 171 register struct domain *dp; 172 register struct protosw *pr; 173 struct protosw *maybe = 0; 174 175 if (family == 0) 176 return (0); 177 for (dp = domains; dp; dp = dp->dom_next) 178 if (dp->dom_family == family) 179 goto found; 180 return (0); 181 found: 182 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { 183 if ((pr->pr_protocol == protocol) && (pr->pr_type == type)) 184 return (pr); 185 186 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW && 187 pr->pr_protocol == 0 && maybe == (struct protosw *)0) 188 maybe = pr; 189 } 190 return (maybe); 191 } 192 193 void 194 pfctlinput(cmd, sa) 195 int cmd; 196 struct sockaddr *sa; 197 { 198 register struct domain *dp; 199 register struct protosw *pr; 200 201 for (dp = domains; dp; dp = dp->dom_next) 202 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 203 if (pr->pr_ctlinput) 204 (*pr->pr_ctlinput)(cmd, sa, (void *)0); 205 } 206 207 void 208 pfctlinput2(cmd, sa, ctlparam) 209 int cmd; 210 struct sockaddr *sa; 211 void *ctlparam; 212 { 213 struct domain *dp; 214 struct protosw *pr; 215 216 if (!sa) 217 return; 218 for (dp = domains; dp; dp = dp->dom_next) { 219 /* 220 * the check must be made by xx_ctlinput() anyways, to 221 * make sure we use data item pointed to by ctlparam in 222 * correct way. the following check is made just for safety. 223 */ 224 if (dp->dom_family != sa->sa_family) 225 continue; 226 227 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 228 if (pr->pr_ctlinput) 229 (*pr->pr_ctlinput)(cmd, sa, ctlparam); 230 } 231 } 232 233 static void 234 pfslowtimo(arg) 235 void *arg; 236 { 237 register struct domain *dp; 238 register struct protosw *pr; 239 240 NET_ASSERT_GIANT(); 241 242 for (dp = domains; dp; dp = dp->dom_next) 243 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 244 if (pr->pr_slowtimo) 245 (*pr->pr_slowtimo)(); 246 callout_reset(&pfslow_callout, hz/2, pfslowtimo, NULL); 247 } 248 249 static void 250 pffasttimo(arg) 251 void *arg; 252 { 253 register struct domain *dp; 254 register struct protosw *pr; 255 256 NET_ASSERT_GIANT(); 257 258 for (dp = domains; dp; dp = dp->dom_next) 259 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 260 if (pr->pr_fasttimo) 261 (*pr->pr_fasttimo)(); 262 callout_reset(&pffast_callout, hz/5, pffasttimo, NULL); 263 } 264