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. 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 * $FreeBSD: src/sys/kern/uipc_domain.c,v 1.22.2.1 2001/07/03 11:01:37 ume Exp $ 31 */ 32 33 #include <sys/param.h> 34 #include <sys/socket.h> 35 #include <sys/protosw.h> 36 #include <sys/domain.h> 37 #include <sys/mbuf.h> 38 #include <sys/kernel.h> 39 #include <sys/socketvar.h> 40 #include <sys/socketops.h> 41 #include <sys/systm.h> 42 #include <vm/vm_zone.h> 43 44 #include <sys/thread2.h> 45 46 /* 47 * System initialization 48 * 49 * Note: domain initialization wants to take place on a per domain basis 50 * as a result of traversing a linker set. Most likely, each domain 51 * want to call a registration function rather than being handled here 52 * in domaininit(). Probably this will look like: 53 * 54 * SYSINIT(unique, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY, domain_add, xxx); 55 * 56 * Where 'xxx' is replaced by the address of a parameter struct to be 57 * passed to the doamin_add() function. 58 */ 59 60 static void domaininit (void *); 61 SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL); 62 63 struct domainlist domains; 64 65 /* 66 * Add a new protocol domain to the list of supported domains 67 * Note: you cant unload it again because a socket may be using it. 68 * XXX can't fail at this time. 69 */ 70 #define PR_NOTSUPP(pr, label) \ 71 if (pr->pr_ ## label == NULL) \ 72 pr->pr_ ## label = pr_generic_notsupp; 73 74 #define PRU_NOTSUPP(pu, label) \ 75 if (pu->pru_ ## label == NULL) \ 76 pu->pru_ ## label = pr_generic_notsupp; 77 78 static void 79 net_init_domain(struct domain *dp) 80 { 81 struct protosw *pr; 82 struct pr_usrreqs *pu; 83 84 crit_enter(); 85 86 if (dp->dom_init) 87 (*dp->dom_init)(); 88 89 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { 90 pu = pr->pr_usrreqs; 91 if (pu == NULL) { 92 panic("domaininit: %ssw[%ld] has no usrreqs!", 93 dp->dom_name, (long)(pr - dp->dom_protosw)); 94 } 95 PR_NOTSUPP(pr, ctloutput); 96 PRU_NOTSUPP(pu, accept); 97 PRU_NOTSUPP(pu, bind); 98 PRU_NOTSUPP(pu, connect); 99 PRU_NOTSUPP(pu, connect2); 100 PRU_NOTSUPP(pu, control); 101 PRU_NOTSUPP(pu, disconnect); 102 PRU_NOTSUPP(pu, listen); 103 PRU_NOTSUPP(pu, peeraddr); 104 PRU_NOTSUPP(pu, rcvd); 105 PRU_NOTSUPP(pu, rcvoob); 106 PRU_NOTSUPP(pu, shutdown); 107 PRU_NOTSUPP(pu, sockaddr); 108 109 if (pu->pru_sense == NULL) 110 pu->pru_sense = pru_sense_null; 111 if (pu->pru_sosend == NULL) 112 pu->pru_sosend = pru_sosend_notsupp; 113 if (pu->pru_soreceive == NULL) 114 pu->pru_soreceive = pru_soreceive_notsupp; 115 116 if (pr->pr_init) 117 (*pr->pr_init)(); 118 } 119 /* 120 * update global information about maximums 121 */ 122 max_hdr = max_linkhdr + max_protohdr; 123 max_datalen = MHLEN - max_hdr; 124 crit_exit(); 125 } 126 127 /* 128 * Add a new protocol domain to the list of supported domains 129 * Note: you cant unload it again because a socket may be using it. 130 * XXX can't fail at this time. 131 */ 132 void 133 net_add_domain(void *data) 134 { 135 struct domain *dp = data; 136 137 crit_enter(); 138 SLIST_INSERT_HEAD(&domains, dp, dom_next); 139 crit_exit(); 140 net_init_domain(dp); 141 } 142 143 /* ARGSUSED*/ 144 static void 145 domaininit(void *dummy) 146 { 147 if (max_linkhdr < 20) /* XXX */ 148 max_linkhdr = 20; 149 } 150 151 152 struct protosw * 153 pffindtype(int family, int type) 154 { 155 struct domain *dp; 156 struct protosw *pr; 157 158 SLIST_FOREACH(dp, &domains, dom_next) 159 if (dp->dom_family == family) 160 goto found; 161 return (NULL); 162 163 found: 164 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 165 if (pr->pr_type && pr->pr_type == type) 166 return (pr); 167 return (NULL); 168 } 169 170 struct protosw * 171 pffindproto(int family, int protocol, int type) 172 { 173 struct domain *dp; 174 struct protosw *pr; 175 struct protosw *maybe = NULL; 176 177 if (family == 0) 178 return (NULL); 179 SLIST_FOREACH(dp, &domains, dom_next) 180 if (dp->dom_family == family) 181 goto found; 182 return (NULL); 183 184 found: 185 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { 186 if ((pr->pr_protocol == protocol) && (pr->pr_type == type)) 187 return (pr); 188 189 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW && 190 pr->pr_protocol == 0 && maybe == NULL) 191 maybe = pr; 192 } 193 return (maybe); 194 } 195 196 void 197 kpfctlinput(int cmd, struct sockaddr *sa) 198 { 199 struct domain *dp; 200 struct protosw *pr; 201 202 SLIST_FOREACH(dp, &domains, dom_next) { 203 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 204 so_pr_ctlinput(pr, cmd, sa, NULL); 205 } 206 } 207 208 void 209 kpfctlinput_direct(int cmd, struct sockaddr *sa) 210 { 211 struct domain *dp; 212 struct protosw *pr; 213 214 SLIST_FOREACH(dp, &domains, dom_next) { 215 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 216 so_pr_ctlinput_direct(pr, cmd, sa, NULL); 217 } 218 } 219 220 void 221 kpfctlinput2(int cmd, struct sockaddr *sa, void *ctlparam) 222 { 223 struct domain *dp; 224 struct protosw *pr; 225 226 if (!sa) 227 return; 228 SLIST_FOREACH(dp, &domains, dom_next) { 229 /* 230 * the check must be made by xx_ctlinput() anyways, to 231 * make sure we use data item pointed to by ctlparam in 232 * correct way. the following check is made just for safety. 233 */ 234 if (dp->dom_family != sa->sa_family) 235 continue; 236 237 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 238 so_pr_ctlinput(pr, cmd, sa, ctlparam); 239 } 240 } 241