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 * $Id: uipc_domain.c,v 1.17 1997/04/27 20:00:42 wollman Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/socket.h> 39 #include <sys/protosw.h> 40 #include <sys/domain.h> 41 #include <sys/mbuf.h> 42 #include <sys/kernel.h> 43 #include <sys/systm.h> 44 45 /* 46 * System initialization 47 * 48 * Note: domain initialization wants to take place on a per domain basis 49 * as a result of traversing a linker set. Most likely, each domain 50 * want to call a registration function rather than being handled here 51 * in domaininit(). Probably this will look like: 52 * 53 * SYSINIT(unique, SI_SUB_PROTO_DOMAI, SI_ORDER_ANY, domain_add, xxx) 54 * 55 * Where 'xxx' is replaced by the address of a parameter struct to be 56 * passed to the doamin_add() function. 57 */ 58 59 static int x_save_spl; /* used by kludge*/ 60 static void kludge_splimp __P((void *)); 61 static void kludge_splx __P((void *)); 62 static void domaininit __P((void *)); 63 SYSINIT(splimp, SI_SUB_PROTO_BEGIN, SI_ORDER_FIRST, kludge_splimp, &x_save_spl) 64 SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL) 65 SYSINIT(splx, SI_SUB_PROTO_END, SI_ORDER_FIRST, kludge_splx, &x_save_spl) 66 67 static void pffasttimo __P((void *)); 68 static void pfslowtimo __P((void *)); 69 70 struct domain *domains; 71 72 #define ADDDOMAIN(x) { \ 73 __CONCAT(x,domain.dom_next) = domains; \ 74 domains = &__CONCAT(x,domain); \ 75 } 76 77 extern struct linker_set domain_set; 78 79 /* ARGSUSED*/ 80 static void 81 domaininit(dummy) 82 void *dummy; 83 { 84 register struct domain *dp, **dpp; 85 register struct protosw *pr; 86 87 /* 88 * NB - local domain is always present. 89 */ 90 ADDDOMAIN(local); 91 92 for (dpp = (struct domain **)domain_set.ls_items; *dpp; dpp++) { 93 (**dpp).dom_next = domains; 94 domains = *dpp; 95 } 96 97 /* - not in our sources 98 #ifdef ISDN 99 ADDDOMAIN(isdn); 100 #endif 101 */ 102 103 for (dp = domains; dp; dp = dp->dom_next) { 104 if (dp->dom_init) 105 (*dp->dom_init)(); 106 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++){ 107 #ifdef PRU_OLDSTYLE 108 /* See comments in uipc_socket2.c. */ 109 if (pr->pr_usrreqs == 0 && pr->pr_ousrreq) 110 pr->pr_usrreqs = &pru_oldstyle; 111 #else 112 if (pr->pr_usrreqs == 0) 113 panic("domaininit: %ssw[%d] has no usrreqs!", 114 dp->dom_name, 115 (int)(pr - dp->dom_protosw)); 116 #endif 117 if (pr->pr_init) 118 (*pr->pr_init)(); 119 } 120 } 121 122 if (max_linkhdr < 16) /* XXX */ 123 max_linkhdr = 16; 124 max_hdr = max_linkhdr + max_protohdr; 125 max_datalen = MHLEN - max_hdr; 126 timeout(pffasttimo, (void *)0, 1); 127 timeout(pfslowtimo, (void *)0, 1); 128 } 129 130 131 /* 132 * The following two operations are kludge code. Most likely, they should 133 * be done as a "domainpreinit()" for the first function and then rolled 134 * in as the last act of "domaininit()" for the second. 135 * 136 * In point of fact, it is questionable why other initialization prior 137 * to this does not also take place at splimp by default. 138 */ 139 static void 140 kludge_splimp(udata) 141 void *udata; 142 { 143 int *savesplp = udata; 144 145 *savesplp = splimp(); 146 } 147 148 static void 149 kludge_splx(udata) 150 void *udata; 151 { 152 int *savesplp = udata; 153 154 splx( *savesplp); 155 } 156 157 158 159 struct protosw * 160 pffindtype(family, type) 161 int family; 162 int type; 163 { 164 register struct domain *dp; 165 register struct protosw *pr; 166 167 for (dp = domains; dp; dp = dp->dom_next) 168 if (dp->dom_family == family) 169 goto found; 170 return (0); 171 found: 172 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 173 if (pr->pr_type && pr->pr_type == type) 174 return (pr); 175 return (0); 176 } 177 178 struct protosw * 179 pffindproto(family, protocol, type) 180 int family; 181 int protocol; 182 int type; 183 { 184 register struct domain *dp; 185 register struct protosw *pr; 186 struct protosw *maybe = 0; 187 188 if (family == 0) 189 return (0); 190 for (dp = domains; dp; dp = dp->dom_next) 191 if (dp->dom_family == family) 192 goto found; 193 return (0); 194 found: 195 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { 196 if ((pr->pr_protocol == protocol) && (pr->pr_type == type)) 197 return (pr); 198 199 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW && 200 pr->pr_protocol == 0 && maybe == (struct protosw *)0) 201 maybe = pr; 202 } 203 return (maybe); 204 } 205 206 void 207 pfctlinput(cmd, sa) 208 int cmd; 209 struct sockaddr *sa; 210 { 211 register struct domain *dp; 212 register struct protosw *pr; 213 214 for (dp = domains; dp; dp = dp->dom_next) 215 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 216 if (pr->pr_ctlinput) 217 (*pr->pr_ctlinput)(cmd, sa, (void *)0); 218 } 219 220 static void 221 pfslowtimo(arg) 222 void *arg; 223 { 224 register struct domain *dp; 225 register struct protosw *pr; 226 227 for (dp = domains; dp; dp = dp->dom_next) 228 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 229 if (pr->pr_slowtimo) 230 (*pr->pr_slowtimo)(); 231 timeout(pfslowtimo, (void *)0, hz/2); 232 } 233 234 static void 235 pffasttimo(arg) 236 void *arg; 237 { 238 register struct domain *dp; 239 register struct protosw *pr; 240 241 for (dp = domains; dp; dp = dp->dom_next) 242 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 243 if (pr->pr_fasttimo) 244 (*pr->pr_fasttimo)(); 245 timeout(pffasttimo, (void *)0, hz/5); 246 } 247