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 /*      $NetBSD: uipc_domain.c,v 1.46.2.1 2004/05/28 07:24:09 tron Exp $        */
    2 
    3 /*
    4  * Copyright (c) 1982, 1986, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)uipc_domain.c       8.3 (Berkeley) 2/14/95
   32  */
   33 
   34 #include <sys/cdefs.h>
   35 __KERNEL_RCSID(0, "$NetBSD: uipc_domain.c,v 1.46.2.1 2004/05/28 07:24:09 tron Exp $");
   36 
   37 #include "opt_inet.h"
   38 #include "opt_ipsec.h"
   39 #include "opt_atalk.h"
   40 #include "opt_ccitt.h"
   41 #include "opt_iso.h"
   42 #include "opt_ns.h"
   43 #include "opt_mbuftrace.h"
   44 #include "opt_natm.h"
   45 #include "arp.h"
   46 
   47 #include <sys/param.h>
   48 #include <sys/socket.h>
   49 #include <sys/protosw.h>
   50 #include <sys/domain.h>
   51 #include <sys/mbuf.h>
   52 #include <sys/time.h>
   53 #include <sys/kernel.h>
   54 #include <sys/systm.h>
   55 #include <sys/callout.h>
   56 #include <sys/proc.h>
   57 #include <sys/sysctl.h>
   58 
   59 void    pffasttimo(void *);
   60 void    pfslowtimo(void *);
   61 
   62 struct  domain  *domains;
   63 
   64 struct callout pffasttimo_ch, pfslowtimo_ch;
   65 
   66 /*
   67  * Current time values for fast and slow timeouts.  We can use u_int
   68  * relatively safely.  The fast timer will roll over in 27 years and
   69  * the slow timer in 68 years.
   70  */
   71 u_int   pfslowtimo_now;
   72 u_int   pffasttimo_now;
   73 
   74 #define ADDDOMAIN(x)    { \
   75         extern struct domain __CONCAT(x,domain); \
   76         __CONCAT(x,domain.dom_next) = domains; \
   77         domains = &__CONCAT(x,domain); \
   78 }
   79 
   80 void
   81 domaininit()
   82 {
   83         struct domain *dp;
   84         struct protosw *pr;
   85 
   86 #undef unix
   87         /*
   88          * KAME NOTE: ADDDOMAIN(route) is moved to the last part so that
   89          * it will be initialized as the *first* element.  confusing!
   90          */
   91 #ifndef lint
   92         ADDDOMAIN(unix);
   93 #ifdef INET
   94         ADDDOMAIN(inet);
   95 #endif
   96 #ifdef INET6
   97         ADDDOMAIN(inet6);
   98 #endif
   99 #ifdef NS
  100         ADDDOMAIN(ns);
  101 #endif
  102 #ifdef ISO
  103         ADDDOMAIN(iso);
  104 #endif
  105 #ifdef CCITT
  106         ADDDOMAIN(ccitt);
  107 #endif
  108 #ifdef NATM
  109         ADDDOMAIN(natm);
  110 #endif
  111 #ifdef NETATALK
  112         ADDDOMAIN(atalk);
  113 #endif
  114 #if defined(IPSEC) || defined(FAST_IPSEC)
  115         ADDDOMAIN(key);
  116 #endif
  117 #ifdef INET
  118 #if NARP > 0
  119         ADDDOMAIN(arp);
  120 #endif
  121 #endif
  122         ADDDOMAIN(route);
  123 #endif /* ! lint */
  124 
  125         for (dp = domains; dp; dp = dp->dom_next) {
  126                 if (dp->dom_init)
  127                         (*dp->dom_init)();
  128 #ifdef MBUFTRACE
  129                 if (dp->dom_mowner.mo_name[0] == '\0') {
  130                         strncpy(dp->dom_mowner.mo_name, dp->dom_name,
  131                             sizeof(dp->dom_mowner.mo_name));
  132                         MOWNER_ATTACH(&dp->dom_mowner);
  133                 }
  134 #endif
  135                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  136                         if (pr->pr_init)
  137                                 (*pr->pr_init)();
  138         }
  139 
  140         if (max_linkhdr < 16)           /* XXX */
  141                 max_linkhdr = 16;
  142         max_hdr = max_linkhdr + max_protohdr;
  143         max_datalen = MHLEN - max_hdr;
  144 
  145         callout_init(&pffasttimo_ch);
  146         callout_init(&pfslowtimo_ch);
  147 
  148         callout_reset(&pffasttimo_ch, 1, pffasttimo, NULL);
  149         callout_reset(&pfslowtimo_ch, 1, pfslowtimo, NULL);
  150 }
  151 
  152 struct domain *
  153 pffinddomain(family)
  154         int family;
  155 {
  156         struct domain *dp;
  157 
  158         for (dp = domains; dp != NULL; dp = dp->dom_next)
  159                 if (dp->dom_family == family)
  160                         return (dp);
  161         return (NULL);
  162 }
  163 
  164 struct protosw *
  165 pffindtype(family, type)
  166         int family, type;
  167 {
  168         struct domain *dp;
  169         struct protosw *pr;
  170 
  171         dp = pffinddomain(family);
  172         if (dp == NULL)
  173                 return (NULL);
  174 
  175         for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  176                 if (pr->pr_type && pr->pr_type == type)
  177                         return (pr);
  178 
  179         return (NULL);
  180 }
  181 
  182 struct protosw *
  183 pffindproto(family, protocol, type)
  184         int family, protocol, type;
  185 {
  186         struct domain *dp;
  187         struct protosw *pr;
  188         struct protosw *maybe = NULL;
  189 
  190         if (family == 0)
  191                 return (NULL);
  192 
  193         dp = pffinddomain(family);
  194         if (dp == NULL)
  195                 return (NULL);
  196 
  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 SYSCTL_SETUP(sysctl_net_setup, "sysctl net subtree setup")
  209 {
  210         sysctl_createv(clog, 0, NULL, NULL,
  211                        CTLFLAG_PERMANENT,
  212                        CTLTYPE_NODE, "net", NULL,
  213                        NULL, 0, NULL, 0,
  214                        CTL_NET, CTL_EOL);
  215 
  216         sysctl_createv(clog, 0, NULL, NULL,
  217                        CTLFLAG_PERMANENT,
  218                        CTLTYPE_NODE, "local",
  219                        SYSCTL_DESCR("PF_LOCAL related settings"),
  220                        NULL, 0, NULL, 0,
  221                        CTL_NET, PF_LOCAL, CTL_EOL);
  222 
  223         /*
  224          * other protocols are expected to have their own setup
  225          * routines that will do everything.  we end up not having
  226          * anything at all to do.
  227          */
  228 }
  229 
  230 void
  231 pfctlinput(cmd, sa)
  232         int cmd;
  233         struct sockaddr *sa;
  234 {
  235         struct domain *dp;
  236         struct protosw *pr;
  237 
  238         for (dp = domains; dp; dp = dp->dom_next)
  239                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  240                         if (pr->pr_ctlinput)
  241                                 (*pr->pr_ctlinput)(cmd, sa, NULL);
  242 }
  243 
  244 void
  245 pfctlinput2(cmd, sa, ctlparam)
  246         int cmd;
  247         struct sockaddr *sa;
  248         void *ctlparam;
  249 {
  250         struct domain *dp;
  251         struct protosw *pr;
  252 
  253         if (!sa)
  254                 return;
  255         for (dp = domains; dp; dp = dp->dom_next) {
  256                 /*
  257                  * the check must be made by xx_ctlinput() anyways, to
  258                  * make sure we use data item pointed to by ctlparam in
  259                  * correct way.  the following check is made just for safety.
  260                  */
  261                 if (dp->dom_family != sa->sa_family)
  262                         continue;
  263 
  264                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  265                         if (pr->pr_ctlinput)
  266                                 (*pr->pr_ctlinput)(cmd, sa, ctlparam);
  267         }
  268 }
  269 
  270 void
  271 pfslowtimo(arg)
  272         void *arg;
  273 {
  274         struct domain *dp;
  275         struct protosw *pr;
  276 
  277         pfslowtimo_now++;
  278 
  279         for (dp = domains; dp; dp = dp->dom_next)
  280                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  281                         if (pr->pr_slowtimo)
  282                                 (*pr->pr_slowtimo)();
  283         callout_reset(&pfslowtimo_ch, hz / 2, pfslowtimo, NULL);
  284 }
  285 
  286 void
  287 pffasttimo(arg)
  288         void *arg;
  289 {
  290         struct domain *dp;
  291         struct protosw *pr;
  292 
  293         pffasttimo_now++;
  294 
  295         for (dp = domains; dp; dp = dp->dom_next)
  296                 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
  297                         if (pr->pr_fasttimo)
  298                                 (*pr->pr_fasttimo)();
  299         callout_reset(&pffasttimo_ch, hz / 5, pffasttimo, NULL);
  300 }

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