The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*      $OpenBSD: uipc_domain.c,v 1.60 2022/08/14 01:58:28 jsg Exp $    */
    2 /*      $NetBSD: uipc_domain.c,v 1.14 1996/02/09 19:00:44 christos Exp $        */
    3 
    4 /*
    5  * Copyright (c) 1982, 1986, 1993
    6  *      The Regents of the University of California.  All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. Neither the name of the University nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  *      @(#)uipc_domain.c       8.2 (Berkeley) 10/18/93
   33  */
   34 
   35 #include <sys/param.h>
   36 #include <sys/socket.h>
   37 #include <sys/protosw.h>
   38 #include <sys/domain.h>
   39 #include <sys/mbuf.h>
   40 #include <sys/systm.h>
   41 #include <sys/sysctl.h>
   42 #include <sys/timeout.h>
   43 
   44 #include "bpfilter.h"
   45 #include "pflow.h"
   46 
   47 const struct domain *const domains[] = {
   48 #ifdef MPLS
   49         &mplsdomain,
   50 #endif
   51 #if defined (IPSEC) || defined (TCP_SIGNATURE)
   52         &pfkeydomain,
   53 #endif
   54 #ifdef INET6
   55         &inet6domain,
   56 #endif /* INET6 */
   57         &inetdomain,
   58         &unixdomain,
   59         &routedomain,
   60         NULL
   61 };
   62 
   63 void            pffasttimo(void *);
   64 void            pfslowtimo(void *);
   65 const struct domain *   pffinddomain(int);
   66 
   67 void
   68 domaininit(void)
   69 {
   70         const struct domain *dp;
   71         const struct protosw *pr;
   72         static struct timeout pffast_timeout;
   73         static struct timeout pfslow_timeout;
   74         int i;
   75 
   76         for (i = 0; (dp = domains[i]) != NULL; i++) {
   77                 if (dp->dom_init)
   78                         (*dp->dom_init)();
   79                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
   80                         if (pr->pr_init)
   81                                 (*pr->pr_init)();
   82         }
   83 
   84         /*
   85          * max_linkhdr of 64 was chosen to encompass tunnelling
   86          * traffic in IP payloads, eg, by etherip(4) or gif(4),
   87          * without needing to prepend an mbuf to fit those
   88          * headers.
   89          */
   90         if (max_linkhdr < 64)
   91                 max_linkhdr = 64;
   92 
   93         max_hdr = max_linkhdr + max_protohdr;
   94         timeout_set_proc(&pffast_timeout, pffasttimo, &pffast_timeout);
   95         timeout_set_proc(&pfslow_timeout, pfslowtimo, &pfslow_timeout);
   96         timeout_add(&pffast_timeout, 1);
   97         timeout_add(&pfslow_timeout, 1);
   98 }
   99 
  100 const struct domain *
  101 pffinddomain(int family)
  102 {
  103         const struct domain *dp;
  104         int i;
  105 
  106         for (i = 0; (dp = domains[i]) != NULL; i++) {
  107                 if (dp->dom_family == family)
  108                         return (dp);
  109         }
  110         return (NULL);
  111 }
  112 
  113 const struct protosw *
  114 pffindtype(int family, int type)
  115 {
  116         const struct domain *dp;
  117         const struct protosw *pr;
  118 
  119         dp = pffinddomain(family);
  120         if (dp == NULL)
  121                 return (NULL);
  122 
  123         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  124                 if (pr->pr_type && pr->pr_type == type)
  125                         return (pr);
  126         return (NULL);
  127 }
  128 
  129 const struct protosw *
  130 pffindproto(int family, int protocol, int type)
  131 {
  132         const struct domain *dp;
  133         const struct protosw *pr;
  134         const struct protosw *maybe = NULL;
  135 
  136         if (family == PF_UNSPEC)
  137                 return (NULL);
  138 
  139         dp = pffinddomain(family);
  140         if (dp == NULL)
  141                 return (NULL);
  142 
  143         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
  144                 if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
  145                         return (pr);
  146 
  147                 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
  148                     pr->pr_protocol == 0 && maybe == NULL)
  149                         maybe = pr;
  150         }
  151         return (maybe);
  152 }
  153 
  154 static int
  155 net_link_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp,
  156     void *newp, size_t newlen)
  157 {
  158         int node;
  159         int error;
  160 
  161         /*
  162          * All sysctl names at this level are nonterminal.
  163          */
  164         if (namelen < 2)
  165                 return (EISDIR);                /* overloaded */
  166         node = name[0];
  167 
  168         namelen--;
  169         name++;
  170 
  171         switch (node) {
  172         case NET_LINK_IFRXQ:
  173                 error = net_ifiq_sysctl(name, namelen, oldp, oldlenp,
  174                     newp, newlen);
  175                 break;
  176 
  177         default:
  178                 error = ENOPROTOOPT;
  179                 break;
  180         }
  181 
  182         return (error);
  183 }
  184 
  185 int
  186 net_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp,
  187     size_t newlen, struct proc *p)
  188 {
  189         const struct domain *dp;
  190         const struct protosw *pr;
  191         int error, family, protocol;
  192 
  193         /*
  194          * All sysctl names at this level are nonterminal.
  195          * Usually: next two components are protocol family and protocol
  196          *      number, then at least one addition component.
  197          */
  198         if (namelen < 2)
  199                 return (EISDIR);                /* overloaded */
  200         family = name[0];
  201 
  202         if (family == PF_UNSPEC)
  203                 return (0);
  204         if (family == PF_LINK)
  205                 return (net_link_sysctl(name + 1, namelen - 1, oldp, oldlenp,
  206                     newp, newlen));
  207         if (family == PF_UNIX)
  208                 return (uipc_sysctl(name + 1, namelen - 1, oldp, oldlenp,
  209                     newp, newlen));
  210 #if NBPFILTER > 0
  211         if (family == PF_BPF)
  212                 return (bpf_sysctl(name + 1, namelen - 1, oldp, oldlenp,
  213                     newp, newlen));
  214 #endif
  215 #if NPFLOW > 0
  216         if (family == PF_PFLOW)
  217                 return (pflow_sysctl(name + 1, namelen - 1, oldp, oldlenp,
  218                     newp, newlen));
  219 #endif
  220 #ifdef PIPEX
  221         if (family == PF_PIPEX)
  222                 return (pipex_sysctl(name + 1, namelen - 1, oldp, oldlenp,
  223                     newp, newlen));
  224 #endif
  225 #ifdef MPLS
  226         if (family == PF_MPLS)
  227                 return (mpls_sysctl(name + 1, namelen - 1, oldp, oldlenp,
  228                     newp, newlen));
  229 #endif
  230         dp = pffinddomain(family);
  231         if (dp == NULL)
  232                 return (ENOPROTOOPT);
  233 
  234         if (namelen < 3)
  235                 return (EISDIR);                /* overloaded */
  236         protocol = name[1];
  237         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  238                 if (pr->pr_protocol == protocol && pr->pr_sysctl) {
  239                         error = (*pr->pr_sysctl)(name + 2, namelen - 2,
  240                             oldp, oldlenp, newp, newlen);
  241                         return (error);
  242                 }
  243         return (ENOPROTOOPT);
  244 }
  245 
  246 void
  247 pfctlinput(int cmd, struct sockaddr *sa)
  248 {
  249         const struct domain *dp;
  250         const struct protosw *pr;
  251         int i;
  252 
  253         NET_ASSERT_LOCKED();
  254 
  255         for (i = 0; (dp = domains[i]) != NULL; i++) {
  256                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  257                         if (pr->pr_ctlinput)
  258                                 (*pr->pr_ctlinput)(cmd, sa, 0, NULL);
  259         }
  260 }
  261 
  262 void
  263 pfslowtimo(void *arg)
  264 {
  265         struct timeout *to = (struct timeout *)arg;
  266         const struct domain *dp;
  267         const struct protosw *pr;
  268         int i;
  269 
  270         for (i = 0; (dp = domains[i]) != NULL; i++) {
  271                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  272                         if (pr->pr_slowtimo)
  273                                 (*pr->pr_slowtimo)();
  274         }
  275         timeout_add_msec(to, 500);
  276 }
  277 
  278 void
  279 pffasttimo(void *arg)
  280 {
  281         struct timeout *to = (struct timeout *)arg;
  282         const struct domain *dp;
  283         const struct protosw *pr;
  284         int i;
  285 
  286         for (i = 0; (dp = domains[i]) != NULL; i++) {
  287                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  288                         if (pr->pr_fasttimo)
  289                                 (*pr->pr_fasttimo)();
  290         }
  291         timeout_add_msec(to, 200);
  292 }

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