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


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/netnatm/natm_pcb.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*      $NetBSD: natm_pcb.c,v 1.4 1996/11/09 03:26:27 chuck Exp $       */
    2 /*-
    3  *
    4  * Copyright (c) 1996 Charles D. Cranor and Washington University.
    5  * 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. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *      This product includes software developed by Charles D. Cranor and
   18  *      Washington University.
   19  * 4. The name of the author may not be used to endorse or promote products
   20  *    derived from this software without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   32  */
   33 
   34 /*
   35  * atm_pcb.c: manage atm protocol control blocks and keep IP and NATM
   36  * from trying to use each other's VCs.
   37  */
   38 
   39 #include <sys/cdefs.h>
   40 __FBSDID("$FreeBSD$");
   41 
   42 #include <sys/param.h>
   43 #include <sys/systm.h>
   44 #include <sys/malloc.h>
   45 #include <sys/socket.h>
   46 #include <sys/socketvar.h>
   47 
   48 #include <net/if.h>
   49 
   50 #include <netinet/in.h>
   51 
   52 #include <netnatm/natm.h>
   53 
   54 struct npcblist natm_pcbs;
   55 
   56 /*
   57  * npcb_alloc: allocate a npcb [in the free state]
   58  */
   59 struct natmpcb *
   60 npcb_alloc(int wait)
   61 
   62 {
   63         struct natmpcb *npcb;
   64 
   65         npcb = malloc(sizeof(*npcb), M_PCB, wait | M_ZERO);
   66 
   67 #ifdef DIAGNOSTIC
   68         if (wait == M_WAITOK && npcb == NULL)
   69                 panic("npcb_alloc: malloc didn't wait");
   70 #endif
   71 
   72         if (npcb != NULL)
   73                 npcb->npcb_flags = NPCB_FREE;
   74         return (npcb);
   75 }
   76 
   77 
   78 /*
   79  * npcb_free: free a npcb
   80  */
   81 void
   82 npcb_free(struct natmpcb *npcb, int op)
   83 {
   84         int s = splimp();
   85 
   86         if ((npcb->npcb_flags & NPCB_FREE) == 0) {
   87                 LIST_REMOVE(npcb, pcblist);
   88                 npcb->npcb_flags = NPCB_FREE;
   89         }
   90         if (op == NPCB_DESTROY) {
   91                 if (npcb->npcb_inq) {
   92                         npcb->npcb_flags = NPCB_DRAIN;  /* flag for distruct. */
   93                 } else {
   94                         FREE(npcb, M_PCB);              /* kill it! */
   95                 }
   96         }
   97 
   98         splx(s);
   99 }
  100 
  101 
  102 /*
  103  * npcb_add: add or remove npcb from main list
  104  *   returns npcb if ok
  105  */
  106 struct natmpcb *
  107 npcb_add(struct natmpcb *npcb, struct ifnet *ifp, u_int16_t vci, u_int8_t vpi)
  108 {
  109         struct natmpcb *cpcb = NULL;            /* current pcb */
  110         int s = splimp();
  111 
  112 
  113         /*
  114          * lookup required
  115          */
  116         LIST_FOREACH(cpcb, &natm_pcbs, pcblist)
  117                 if (ifp == cpcb->npcb_ifp && vci == cpcb->npcb_vci &&
  118                     vpi == cpcb->npcb_vpi)
  119                         break;
  120 
  121         /*
  122          * add & something already there?
  123          */
  124         if (cpcb) {
  125                 cpcb = NULL;
  126                 goto done;                      /* fail */
  127         }
  128     
  129         /*
  130          * need to allocate a pcb?
  131          */
  132         if (npcb == NULL) {
  133                 /* could be called from lower half */
  134                 cpcb = npcb_alloc(M_NOWAIT);
  135                 if (cpcb == NULL) 
  136                         goto done;                      /* fail */
  137         } else {
  138                 cpcb = npcb;
  139         }
  140 
  141         cpcb->npcb_ifp = ifp;
  142         cpcb->ipaddr.s_addr = 0;
  143         cpcb->npcb_vci = vci;
  144         cpcb->npcb_vpi = vpi;
  145         cpcb->npcb_flags = NPCB_CONNECTED;
  146 
  147         LIST_INSERT_HEAD(&natm_pcbs, cpcb, pcblist);
  148 
  149 done:
  150         splx(s);
  151         return (cpcb);
  152 }
  153 
  154 #ifdef DDB
  155 
  156 int
  157 npcb_dump(void)
  158 {
  159         struct natmpcb *cpcb;
  160 
  161         printf("npcb dump:\n");
  162         LIST_FOREACH(cpcb, &natm_pcbs, pcblist) {
  163                 printf("if=%s, vci=%d, vpi=%d, IP=0x%x, sock=%p, flags=0x%x, "
  164                     "inq=%d\n", cpcb->npcb_ifp->if_xname, cpcb->npcb_vci,
  165                     cpcb->npcb_vpi, cpcb->ipaddr.s_addr, cpcb->npcb_socket, 
  166                     cpcb->npcb_flags, cpcb->npcb_inq);
  167         }
  168         printf("done\n");
  169         return (0);
  170 }
  171 #endif

Cache object: 157c62da99e167b5aca730983f7ff22b


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.