sys/kern/uipc_domain.c

   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  * $FreeBSD: src/sys/kern/uipc_domain.c,v 1.22.2.1 2001/07/03 11:01:37 ume Exp $
  35  * $DragonFly: src/sys/kern/uipc_domain.c,v 1.13 2008/10/27 02:56:30 sephe Exp $
  36  */
  37
  38 #include <sys/param.h>
  39 #include <sys/socket.h>
  40 #include <sys/protosw.h>
  41 #include <sys/domain.h>
  42 #include <sys/mbuf.h>
  43 #include <sys/kernel.h>
  44 #include <sys/socketvar.h>
  45 #include <sys/socketops.h>
  46 #include <sys/systm.h>
  47 #include <vm/vm_zone.h>
  48
  49 #include <sys/thread2.h>
  50
  51 /*
  52  * System initialization
  53  *
  54  * Note: domain initialization wants to take place on a per domain basis
  55  * as a result of traversing a linker set.  Most likely, each domain
  56  * want to call a registration function rather than being handled here
  57  * in domaininit().  Probably this will look like:
  58  *
  59  * SYSINIT(unique, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY, domain_add, xxx)
  60  *
  61  * Where 'xxx' is replaced by the address of a parameter struct to be
  62  * passed to the doamin_add() function.
  63  */
  64
  65 static void domaininit (void *);
  66 SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL)
  67
  68 static void     pffasttimo (void *);
  69 static void     pfslowtimo (void *);
  70
  71 struct domainlist domains;
  72
  73 static struct callout pffasttimo_ch;
  74 static struct callout pfslowtimo_ch;
  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 #define PR_NOTSUPP(pr, label)           \
  82         if (pr->pr_ ## label == NULL)   \
  83                 pr->pr_ ## label = pr_generic_notsupp;
  84
  85 #define PRU_NOTSUPP(pu, label)          \
  86         if (pu->pru_ ## label == NULL)  \
  87                 pu->pru_ ## label = pr_generic_notsupp;
  88
  89 static void
  90 net_init_domain(struct domain *dp)
  91 {
  92         struct protosw *pr;
  93         struct pr_usrreqs *pu;
  94
  95         crit_enter();
  96
  97         if (dp->dom_init)
  98                 (*dp->dom_init)();
  99
 100         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
 101                 pu = pr->pr_usrreqs;
 102                 if (pu == NULL) {
 103                         panic("domaininit: %ssw[%ld] has no usrreqs!",
 104                               dp->dom_name, (long)(pr - dp->dom_protosw));
 105                 }
 106                 PR_NOTSUPP(pr, ctloutput);
 107                 PRU_NOTSUPP(pu, accept);
 108                 PRU_NOTSUPP(pu, bind);
 109                 PRU_NOTSUPP(pu, connect);
 110                 PRU_NOTSUPP(pu, connect2);
 111                 PRU_NOTSUPP(pu, control);
 112                 PRU_NOTSUPP(pu, disconnect);
 113                 PRU_NOTSUPP(pu, listen);
 114                 PRU_NOTSUPP(pu, peeraddr);
 115                 PRU_NOTSUPP(pu, rcvd);
 116                 PRU_NOTSUPP(pu, rcvoob);
 117                 PRU_NOTSUPP(pu, shutdown);
 118                 PRU_NOTSUPP(pu, sockaddr);
 119
 120                 if (pu->pru_sense == NULL)
 121                         pu->pru_sense = pru_sense_null;
 122                 if (pu->pru_sosend == NULL)
 123                         pu->pru_sosend = pru_sosend_notsupp;
 124                 if (pu->pru_soreceive == NULL)
 125                         pu->pru_soreceive = pru_soreceive_notsupp;
 126
 127                 if (pr->pr_init)
 128                         (*pr->pr_init)();
 129         }
 130         /*
 131          * update global information about maximums
 132          */
 133         max_hdr = max_linkhdr + max_protohdr;
 134         max_datalen = MHLEN - max_hdr;
 135         crit_exit();
 136 }
 137
 138 /*
 139  * Add a new protocol domain to the list of supported domains
 140  * Note: you cant unload it again because a socket may be using it.
 141  * XXX can't fail at this time.
 142  */
 143 void
 144 net_add_domain(void *data)
 145 {
 146         struct domain *dp = data;
 147
 148         crit_enter();
 149         SLIST_INSERT_HEAD(&domains, dp, dom_next);
 150         crit_exit();
 151         net_init_domain(dp);
 152 }
 153
 154 /* ARGSUSED*/
 155 static void
 156 domaininit(void *dummy)
 157 {
 158         if (max_linkhdr < 16)           /* XXX */
 159                 max_linkhdr = 16;
 160
 161         callout_init_mp(&pffasttimo_ch);
 162         callout_init_mp(&pfslowtimo_ch);
 163         callout_reset(&pffasttimo_ch, 1, pffasttimo, NULL);
 164         callout_reset(&pfslowtimo_ch, 1, pfslowtimo, NULL);
 165 }
 166
 167
 168 struct protosw *
 169 pffindtype(int family, int type)
 170 {
 171         struct domain *dp;
 172         struct protosw *pr;
 173
 174         SLIST_FOREACH(dp, &domains, dom_next)
 175                 if (dp->dom_family == family)
 176                         goto found;
 177         return (NULL);
 178
 179 found:
 180         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
 181                 if (pr->pr_type && pr->pr_type == type)
 182                         return (pr);
 183         return (NULL);
 184 }
 185
 186 struct protosw *
 187 pffindproto(int family, int protocol, int type)
 188 {
 189         struct domain *dp;
 190         struct protosw *pr;
 191         struct protosw *maybe = NULL;
 192
 193         if (family == 0)
 194                 return (NULL);
 195         SLIST_FOREACH(dp, &domains, dom_next)
 196                 if (dp->dom_family == family)
 197                         goto found;
 198         return (NULL);
 199
 200 found:
 201         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
 202                 if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
 203                         return (pr);
 204
 205                 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
 206                     pr->pr_protocol == 0 && maybe == NULL)
 207                         maybe = pr;
 208         }
 209         return (maybe);
 210 }
 211
 212 void
 213 kpfctlinput(int cmd, struct sockaddr *sa)
 214 {
 215         struct domain *dp;
 216         struct protosw *pr;
 217
 218         SLIST_FOREACH(dp, &domains, dom_next) {
 219                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
 220                         so_pru_ctlinput(pr, cmd, sa, NULL);
 221         }
 222 }
 223
 224 void
 225 kpfctlinput2(int cmd, struct sockaddr *sa, void *ctlparam)
 226 {
 227         struct domain *dp;
 228         struct protosw *pr;
 229
 230         if (!sa)
 231                 return;
 232         SLIST_FOREACH(dp, &domains, dom_next) {
 233                 /*
 234                  * the check must be made by xx_ctlinput() anyways, to
 235                  * make sure we use data item pointed to by ctlparam in
 236                  * correct way.  the following check is made just for safety.
 237                  */
 238                 if (dp->dom_family != sa->sa_family)
 239                         continue;
 240
 241                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
 242                         so_pru_ctlinput(pr, cmd, sa, ctlparam);
 243         }
 244 }
 245
 246 static void
 247 pfslowtimo(void *arg)
 248 {
 249         struct domain *dp;
 250         struct protosw *pr;
 251
 252         SLIST_FOREACH(dp, &domains, dom_next) {
 253                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
 254                         if (pr->pr_slowtimo)
 255                                 (*pr->pr_slowtimo)();
 256         }
 257         callout_reset(&pfslowtimo_ch, hz / 2, pfslowtimo, NULL);
 258 }
 259
 260 static void
 261 pffasttimo(void *arg)
 262 {
 263         struct domain *dp;
 264         struct protosw *pr;
 265
 266         SLIST_FOREACH(dp, &domains, dom_next) {
 267                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
 268                         if (pr->pr_fasttimo)
 269                                 (*pr->pr_fasttimo)();
 270         }
 271         callout_reset(&pffasttimo_ch, hz / 5, pffasttimo, NULL);
 272 }