uipc_domain.c

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    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  * $DragonFly: src/sys/kern/uipc_domain.c,v 1.13 2008/10/27 02:56:30 sephe Exp $
   32  */
   33 
   34 #include <sys/param.h>
   35 #include <sys/socket.h>
   36 #include <sys/protosw.h>
   37 #include <sys/domain.h>
   38 #include <sys/mbuf.h>
   39 #include <sys/kernel.h>
   40 #include <sys/socketvar.h>
   41 #include <sys/socketops.h>
   42 #include <sys/systm.h>
   43 #include <vm/vm_zone.h>
   44 
   45 #include <sys/thread2.h>
   46 
   47 /*
   48  * System initialization
   49  *
   50  * Note: domain initialization wants to take place on a per domain basis
   51  * as a result of traversing a linker set.  Most likely, each domain
   52  * want to call a registration function rather than being handled here
   53  * in domaininit().  Probably this will look like:
   54  *
   55  * SYSINIT(unique, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY, domain_add, xxx)
   56  *
   57  * Where 'xxx' is replaced by the address of a parameter struct to be
   58  * passed to the doamin_add() function.
   59  */
   60 
   61 static void domaininit (void *);
   62 SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL)
   63 
   64 static void     pffasttimo (void *);
   65 static void     pfslowtimo (void *);
   66 
   67 struct domainlist domains;
   68 
   69 static struct callout pffasttimo_ch;
   70 static struct callout pfslowtimo_ch;
   71 
   72 /*
   73  * Add a new protocol domain to the list of supported domains
   74  * Note: you cant unload it again because a socket may be using it.
   75  * XXX can't fail at this time.
   76  */
   77 #define PR_NOTSUPP(pr, label)           \
   78         if (pr->pr_ ## label == NULL)   \
   79                 pr->pr_ ## label = pr_generic_notsupp;
   80 
   81 #define PRU_NOTSUPP(pu, label)          \
   82         if (pu->pru_ ## label == NULL)  \
   83                 pu->pru_ ## label = pr_generic_notsupp;
   84 
   85 static void
   86 net_init_domain(struct domain *dp)
   87 {
   88         struct protosw *pr;
   89         struct pr_usrreqs *pu;
   90 
   91         crit_enter();
   92 
   93         if (dp->dom_init)
   94                 (*dp->dom_init)();
   95 
   96         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
   97                 pu = pr->pr_usrreqs;
   98                 if (pu == NULL) {
   99                         panic("domaininit: %ssw[%ld] has no usrreqs!",
  100                               dp->dom_name, (long)(pr - dp->dom_protosw));
  101                 }
  102                 PR_NOTSUPP(pr, ctloutput);
  103                 PRU_NOTSUPP(pu, accept);
  104                 PRU_NOTSUPP(pu, bind);
  105                 PRU_NOTSUPP(pu, connect);
  106                 PRU_NOTSUPP(pu, connect2);
  107                 PRU_NOTSUPP(pu, control);
  108                 PRU_NOTSUPP(pu, disconnect);
  109                 PRU_NOTSUPP(pu, listen);
  110                 PRU_NOTSUPP(pu, peeraddr);
  111                 PRU_NOTSUPP(pu, rcvd);
  112                 PRU_NOTSUPP(pu, rcvoob);
  113                 PRU_NOTSUPP(pu, shutdown);
  114                 PRU_NOTSUPP(pu, sockaddr);
  115 
  116                 if (pu->pru_sense == NULL)
  117                         pu->pru_sense = pru_sense_null;
  118                 if (pu->pru_sosend == NULL)
  119                         pu->pru_sosend = pru_sosend_notsupp;
  120                 if (pu->pru_soreceive == NULL)
  121                         pu->pru_soreceive = pru_soreceive_notsupp;
  122 
  123                 if (pr->pr_init)
  124                         (*pr->pr_init)();
  125         }
  126         /*
  127          * update global information about maximums
  128          */
  129         max_hdr = max_linkhdr + max_protohdr;
  130         max_datalen = MHLEN - max_hdr;
  131         crit_exit();
  132 }
  133 
  134 /*
  135  * Add a new protocol domain to the list of supported domains
  136  * Note: you cant unload it again because a socket may be using it.
  137  * XXX can't fail at this time.
  138  */
  139 void
  140 net_add_domain(void *data)
  141 {
  142         struct domain *dp = data;
  143 
  144         crit_enter();
  145         SLIST_INSERT_HEAD(&domains, dp, dom_next);
  146         crit_exit();
  147         net_init_domain(dp);
  148 }
  149 
  150 /* ARGSUSED*/
  151 static void
  152 domaininit(void *dummy)
  153 {
  154         if (max_linkhdr < 20)           /* XXX */
  155                 max_linkhdr = 20;
  156 
  157         callout_init_mp(&pffasttimo_ch);
  158         callout_init_mp(&pfslowtimo_ch);
  159         callout_reset(&pffasttimo_ch, 1, pffasttimo, NULL);
  160         callout_reset(&pfslowtimo_ch, 1, pfslowtimo, NULL);
  161 }
  162 
  163 
  164 struct protosw *
  165 pffindtype(int family, int type)
  166 {
  167         struct domain *dp;
  168         struct protosw *pr;
  169 
  170         SLIST_FOREACH(dp, &domains, dom_next)
  171                 if (dp->dom_family == family)
  172                         goto found;
  173         return (NULL);
  174 
  175 found:
  176         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  177                 if (pr->pr_type && pr->pr_type == type)
  178                         return (pr);
  179         return (NULL);
  180 }
  181 
  182 struct protosw *
  183 pffindproto(int family, int protocol, int type)
  184 {
  185         struct domain *dp;
  186         struct protosw *pr;
  187         struct protosw *maybe = NULL;
  188 
  189         if (family == 0)
  190                 return (NULL);
  191         SLIST_FOREACH(dp, &domains, dom_next)
  192                 if (dp->dom_family == family)
  193                         goto found;
  194         return (NULL);
  195 
  196 found:
  197         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
  198                 if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
  199                         return (pr);
  200 
  201                 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
  202                     pr->pr_protocol == 0 && maybe == NULL)
  203                         maybe = pr;
  204         }
  205         return (maybe);
  206 }
  207 
  208 void
  209 kpfctlinput(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_pru_ctlinput(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_pru_ctlinput(pr, cmd, sa, ctlparam);
  239         }
  240 }
  241 
  242 static void
  243 pfslowtimo(void *arg)
  244 {
  245         struct domain *dp;
  246         struct protosw *pr;
  247 
  248         SLIST_FOREACH(dp, &domains, dom_next) {
  249                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  250                         if (pr->pr_slowtimo)
  251                                 (*pr->pr_slowtimo)();
  252         }
  253         callout_reset(&pfslowtimo_ch, hz / 2, pfslowtimo, NULL);
  254 }
  255 
  256 static void
  257 pffasttimo(void *arg)
  258 {
  259         struct domain *dp;
  260         struct protosw *pr;
  261 
  262         SLIST_FOREACH(dp, &domains, dom_next) {
  263                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  264                         if (pr->pr_fasttimo)
  265                                 (*pr->pr_fasttimo)();
  266         }
  267         callout_reset(&pffasttimo_ch, hz / 5, pffasttimo, NULL);
  268 }

Cache object: c3bdbfb6408f7c041afcd00389cc6b67

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FreeBSD/Linux Kernel Cross Reference sys/kern/uipc_domain.c

FreeBSD/Linux Kernel Cross Reference
sys/kern/uipc_domain.c