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 PRU_NOTSUPP(pu, label)          \
  82         if (pu->pru_ ## label == NULL)  \
  83                 pu->pru_ ## label = pru_ ## label ## _notsupp;
  84 #define PRU_NULL(pu, label)             \
  85         if (pu->pru_ ## label == NULL)  \
  86                 pu->pru_ ## label = pru_ ## label ## _null;
  87
  88 static void
  89 net_init_domain(struct domain *dp)
  90 {
  91         struct protosw *pr;
  92         struct pr_usrreqs *pu;
  93
  94         crit_enter();
  95         if (dp->dom_init)
  96                 (*dp->dom_init)();
  97         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
  98                 pu = pr->pr_usrreqs;
  99                 if (pu == NULL)
 100                         panic("domaininit: %ssw[%ld] has no usrreqs!",
 101                               dp->dom_name, (long)(pr - dp->dom_protosw));
 102                 PRU_NOTSUPP(pu, accept);
 103                 PRU_NOTSUPP(pu, bind);
 104                 PRU_NOTSUPP(pu, connect);
 105                 PRU_NOTSUPP(pu, connect2);
 106                 PRU_NOTSUPP(pu, control);
 107                 PRU_NOTSUPP(pu, disconnect);
 108                 PRU_NOTSUPP(pu, listen);
 109                 PRU_NOTSUPP(pu, peeraddr);
 110                 PRU_NOTSUPP(pu, rcvd);
 111                 PRU_NOTSUPP(pu, rcvoob);
 112                 PRU_NULL(pu, sense);
 113                 PRU_NOTSUPP(pu, shutdown);
 114                 PRU_NOTSUPP(pu, sockaddr);
 115                 PRU_NOTSUPP(pu, sosend);
 116                 PRU_NOTSUPP(pu, soreceive);
 117                 PRU_NOTSUPP(pu, sopoll);
 118                 PRU_NOTSUPP(pu, ctloutput);
 119
 120                 if (pr->pr_init)
 121                         (*pr->pr_init)();
 122         }
 123         /*
 124          * update global information about maximums
 125          */
 126         max_hdr = max_linkhdr + max_protohdr;
 127         max_datalen = MHLEN - max_hdr;
 128         crit_exit();
 129 }
 130
 131 /*
 132  * Add a new protocol domain to the list of supported domains
 133  * Note: you cant unload it again because a socket may be using it.
 134  * XXX can't fail at this time.
 135  */
 136 void
 137 net_add_domain(void *data)
 138 {
 139         struct domain *dp = data;
 140
 141         crit_enter();
 142         SLIST_INSERT_HEAD(&domains, dp, dom_next);
 143         crit_exit();
 144         net_init_domain(dp);
 145 }
 146
 147 /* ARGSUSED*/
 148 static void
 149 domaininit(void *dummy)
 150 {
 151         if (max_linkhdr < 16)           /* XXX */
 152                 max_linkhdr = 16;
 153
 154         callout_init(&pffasttimo_ch);
 155         callout_init(&pfslowtimo_ch);
 156         callout_reset(&pffasttimo_ch, 1, pffasttimo, NULL);
 157         callout_reset(&pfslowtimo_ch, 1, pfslowtimo, NULL);
 158 }
 159
 160
 161 struct protosw *
 162 pffindtype(int family, int type)
 163 {
 164         struct domain *dp;
 165         struct protosw *pr;
 166
 167         SLIST_FOREACH(dp, &domains, dom_next)
 168                 if (dp->dom_family == family)
 169                         goto found;
 170         return (NULL);
 171
 172 found:
 173         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
 174                 if (pr->pr_type && pr->pr_type == type)
 175                         return (pr);
 176         return (NULL);
 177 }
 178
 179 struct protosw *
 180 pffindproto(int family, int protocol, int type)
 181 {
 182         struct domain *dp;
 183         struct protosw *pr;
 184         struct protosw *maybe = NULL;
 185
 186         if (family == 0)
 187                 return (NULL);
 188         SLIST_FOREACH(dp, &domains, dom_next)
 189                 if (dp->dom_family == family)
 190                         goto found;
 191         return (NULL);
 192
 193 found:
 194         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
 195                 if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
 196                         return (pr);
 197
 198                 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
 199                     pr->pr_protocol == 0 && maybe == NULL)
 200                         maybe = pr;
 201         }
 202         return (maybe);
 203 }
 204
 205 void
 206 kpfctlinput(int cmd, struct sockaddr *sa)
 207 {
 208         struct domain *dp;
 209         struct protosw *pr;
 210
 211         SLIST_FOREACH(dp, &domains, dom_next) {
 212                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
 213                         so_pru_ctlinput(pr, cmd, sa, NULL);
 214         }
 215 }
 216
 217 void
 218 kpfctlinput2(int cmd, struct sockaddr *sa, void *ctlparam)
 219 {
 220         struct domain *dp;
 221         struct protosw *pr;
 222
 223         if (!sa)
 224                 return;
 225         SLIST_FOREACH(dp, &domains, dom_next) {
 226                 /*
 227                  * the check must be made by xx_ctlinput() anyways, to
 228                  * make sure we use data item pointed to by ctlparam in
 229                  * correct way.  the following check is made just for safety.
 230                  */
 231                 if (dp->dom_family != sa->sa_family)
 232                         continue;
 233
 234                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
 235                         so_pru_ctlinput(pr, cmd, sa, ctlparam);
 236         }
 237 }
 238
 239 static void
 240 pfslowtimo(void *arg)
 241 {
 242         struct domain *dp;
 243         struct protosw *pr;
 244
 245         SLIST_FOREACH(dp, &domains, dom_next)
 246                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
 247                         if (pr->pr_slowtimo)
 248                                 (*pr->pr_slowtimo)();
 249         callout_reset(&pfslowtimo_ch, hz / 2, pfslowtimo, NULL);
 250 }
 251
 252 static void
 253 pffasttimo(void *arg)
 254 {
 255         struct domain *dp;
 256         struct protosw *pr;
 257
 258         SLIST_FOREACH(dp, &domains, dom_next)
 259                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
 260                         if (pr->pr_fasttimo)
 261                                 (*pr->pr_fasttimo)();
 262         callout_reset(&pffasttimo_ch, hz / 5, pffasttimo, NULL);
 263 }