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 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <sys/param.h> 40 #include <sys/socket.h> 41 #include <sys/protosw.h> 42 #include <sys/domain.h> 43 #include <sys/mbuf.h> 44 #include <sys/kernel.h> 45 #include <sys/lock.h> 46 #include <sys/mutex.h> 47 #include <sys/socketvar.h> 48 #include <sys/systm.h> 49 #include <vm/uma.h> 50 51 /* 52 * System initialization 53 * 54 * Note: domain initialization takes place on a per domain basis 55 * as a result of traversing a SYSINIT linker set. Most likely, 56 * each domain would want to call DOMAIN_SET(9) itself, which 57 * would cause the domain to be added just after domaininit() 58 * is called during startup. 59 * 60 * See DOMAIN_SET(9) for details on its use. 61 */ 62 63 static void domaininit(void *); 64 SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL) 65 66 static struct callout pffast_callout; 67 static struct callout pfslow_callout; 68 69 static void pffasttimo(void *); 70 static void pfslowtimo(void *); 71 72 struct domain *domains; /* registered protocol domains */ 73 struct mtx dom_mtx; /* domain list lock */ 74 MTX_SYSINIT(domain, &dom_mtx, "domain list", MTX_DEF); 75 76 /* 77 * Add a new protocol domain to the list of supported domains 78 * Note: you cant unload it again because a socket may be using it. 79 * XXX can't fail at this time. 80 */ 81 static void 82 net_init_domain(struct domain *dp) 83 { 84 struct protosw *pr; 85 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 == 0) 90 panic("domaininit: %ssw[%d] has no usrreqs!", 91 dp->dom_name, 92 (int)(pr - dp->dom_protosw)); 93 if (pr->pr_init) 94 (*pr->pr_init)(); 95 } 96 /* 97 * update global information about maximums 98 */ 99 max_hdr = max_linkhdr + max_protohdr; 100 max_datalen = MHLEN - max_hdr; 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; 112 113 dp = (struct domain *)data; 114 mtx_lock(&dom_mtx); 115 dp->dom_next = domains; 116 domains = dp; 117 mtx_unlock(&dom_mtx); 118 net_init_domain(dp); 119 } 120 121 /* ARGSUSED*/ 122 static void 123 domaininit(void *dummy) 124 { 125 /* 126 * Before we do any setup, make sure to initialize the 127 * zone allocator we get struct sockets from. 128 */ 129 130 socket_zone = uma_zcreate("socket", sizeof(struct socket), NULL, NULL, 131 NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE); 132 uma_zone_set_max(socket_zone, maxsockets); 133 134 if (max_linkhdr < 16) /* XXX */ 135 max_linkhdr = 16; 136 137 if (debug_mpsafenet) { 138 callout_init(&pffast_callout, CALLOUT_MPSAFE); 139 callout_init(&pfslow_callout, CALLOUT_MPSAFE); 140 } else { 141 callout_init(&pffast_callout, 0); 142 callout_init(&pfslow_callout, 0); 143 } 144 145 callout_reset(&pffast_callout, 1, pffasttimo, NULL); 146 callout_reset(&pfslow_callout, 1, pfslowtimo, NULL); 147 } 148 149 150 struct protosw * 151 pffindtype(family, type) 152 int family; 153 int type; 154 { 155 register struct domain *dp; 156 register struct protosw *pr; 157 158 for (dp = domains; dp; dp = dp->dom_next) 159 if (dp->dom_family == family) 160 goto found; 161 return (0); 162 found: 163 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 164 if (pr->pr_type && pr->pr_type == type) 165 return (pr); 166 return (0); 167 } 168 169 struct protosw * 170 pffindproto(family, protocol, type) 171 int family; 172 int protocol; 173 int type; 174 { 175 register struct domain *dp; 176 register struct protosw *pr; 177 struct protosw *maybe = 0; 178 179 if (family == 0) 180 return (0); 181 for (dp = domains; dp; dp = dp->dom_next) 182 if (dp->dom_family == family) 183 goto found; 184 return (0); 185 found: 186 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { 187 if ((pr->pr_protocol == protocol) && (pr->pr_type == type)) 188 return (pr); 189 190 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW && 191 pr->pr_protocol == 0 && maybe == (struct protosw *)0) 192 maybe = pr; 193 } 194 return (maybe); 195 } 196 197 void 198 pfctlinput(cmd, sa) 199 int cmd; 200 struct sockaddr *sa; 201 { 202 register struct domain *dp; 203 register struct protosw *pr; 204 205 for (dp = domains; dp; dp = dp->dom_next) 206 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 207 if (pr->pr_ctlinput) 208 (*pr->pr_ctlinput)(cmd, sa, (void *)0); 209 } 210 211 void 212 pfctlinput2(cmd, sa, ctlparam) 213 int cmd; 214 struct sockaddr *sa; 215 void *ctlparam; 216 { 217 struct domain *dp; 218 struct protosw *pr; 219 220 if (!sa) 221 return; 222 for (dp = domains; dp; dp = dp->dom_next) { 223 /* 224 * the check must be made by xx_ctlinput() anyways, to 225 * make sure we use data item pointed to by ctlparam in 226 * correct way. the following check is made just for safety. 227 */ 228 if (dp->dom_family != sa->sa_family) 229 continue; 230 231 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 232 if (pr->pr_ctlinput) 233 (*pr->pr_ctlinput)(cmd, sa, ctlparam); 234 } 235 } 236 237 static void 238 pfslowtimo(arg) 239 void *arg; 240 { 241 register struct domain *dp; 242 register struct protosw *pr; 243 244 NET_ASSERT_GIANT(); 245 246 for (dp = domains; dp; dp = dp->dom_next) 247 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 248 if (pr->pr_slowtimo) 249 (*pr->pr_slowtimo)(); 250 callout_reset(&pfslow_callout, hz/2, pfslowtimo, NULL); 251 } 252 253 static void 254 pffasttimo(arg) 255 void *arg; 256 { 257 register struct domain *dp; 258 register struct protosw *pr; 259 260 NET_ASSERT_GIANT(); 261 262 for (dp = domains; dp; dp = dp->dom_next) 263 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 264 if (pr->pr_fasttimo) 265 (*pr->pr_fasttimo)(); 266 callout_reset(&pffast_callout, hz/5, pffasttimo, NULL); 267 } 268