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 callout_init(&pffast_callout, 0); 138 callout_init(&pfslow_callout, 0); 139 140 callout_reset(&pffast_callout, 1, pffasttimo, NULL); 141 callout_reset(&pfslow_callout, 1, pfslowtimo, NULL); 142 } 143 144 145 struct protosw * 146 pffindtype(family, type) 147 int family; 148 int type; 149 { 150 register struct domain *dp; 151 register struct protosw *pr; 152 153 for (dp = domains; dp; dp = dp->dom_next) 154 if (dp->dom_family == family) 155 goto found; 156 return (0); 157 found: 158 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 159 if (pr->pr_type && pr->pr_type == type) 160 return (pr); 161 return (0); 162 } 163 164 struct protosw * 165 pffindproto(family, protocol, type) 166 int family; 167 int protocol; 168 int type; 169 { 170 register struct domain *dp; 171 register struct protosw *pr; 172 struct protosw *maybe = 0; 173 174 if (family == 0) 175 return (0); 176 for (dp = domains; dp; dp = dp->dom_next) 177 if (dp->dom_family == family) 178 goto found; 179 return (0); 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 *)0) 187 maybe = pr; 188 } 189 return (maybe); 190 } 191 192 void 193 pfctlinput(cmd, sa) 194 int cmd; 195 struct sockaddr *sa; 196 { 197 register struct domain *dp; 198 register struct protosw *pr; 199 200 for (dp = domains; dp; dp = dp->dom_next) 201 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 202 if (pr->pr_ctlinput) 203 (*pr->pr_ctlinput)(cmd, sa, (void *)0); 204 } 205 206 void 207 pfctlinput2(cmd, sa, ctlparam) 208 int cmd; 209 struct sockaddr *sa; 210 void *ctlparam; 211 { 212 struct domain *dp; 213 struct protosw *pr; 214 215 if (!sa) 216 return; 217 for (dp = domains; dp; dp = dp->dom_next) { 218 /* 219 * the check must be made by xx_ctlinput() anyways, to 220 * make sure we use data item pointed to by ctlparam in 221 * correct way. the following check is made just for safety. 222 */ 223 if (dp->dom_family != sa->sa_family) 224 continue; 225 226 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 227 if (pr->pr_ctlinput) 228 (*pr->pr_ctlinput)(cmd, sa, ctlparam); 229 } 230 } 231 232 static void 233 pfslowtimo(arg) 234 void *arg; 235 { 236 register struct domain *dp; 237 register struct protosw *pr; 238 239 for (dp = domains; dp; dp = dp->dom_next) 240 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 241 if (pr->pr_slowtimo) 242 (*pr->pr_slowtimo)(); 243 callout_reset(&pfslow_callout, hz/2, pfslowtimo, NULL); 244 } 245 246 static void 247 pffasttimo(arg) 248 void *arg; 249 { 250 register struct domain *dp; 251 register struct protosw *pr; 252 253 for (dp = domains; dp; dp = dp->dom_next) 254 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 255 if (pr->pr_fasttimo) 256 (*pr->pr_fasttimo)(); 257 callout_reset(&pffast_callout, hz/5, pffasttimo, NULL); 258 } 259