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-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 1996 Charles D. Cranor and Washington University.
    3  * 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 Charles D. Cranor and
   16  *      Washington University.
   17  * 4. The name of the author may not be used to endorse or promote products
   18  *    derived from this software without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   30  *
   31  * $NetBSD: natm_pcb.c,v 1.4 1996/11/09 03:26:27 chuck Exp $
   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 "opt_ddb.h"
   40 
   41 #include <sys/cdefs.h>
   42 __FBSDID("$FreeBSD: releng/11.0/sys/netnatm/natm_pcb.c 257176 2013-10-26 17:58:36Z glebius $");
   43 
   44 #include <sys/param.h>
   45 #include <sys/kernel.h>
   46 #include <sys/lock.h>
   47 #include <sys/malloc.h>
   48 #include <sys/mutex.h>
   49 #include <sys/systm.h>
   50 #include <sys/socket.h>
   51 #include <sys/socketvar.h>
   52 
   53 #include <net/if.h>
   54 #include <net/if_var.h>         /* XXX: db_show_natm() */
   55 
   56 #include <netinet/in.h>
   57 
   58 #include <netnatm/natm.h>
   59 
   60 #include <ddb/ddb.h>
   61 
   62 struct npcblist natm_pcbs;
   63 
   64 /*
   65  * npcb_alloc: allocate a npcb [in the free state]
   66  */
   67 struct natmpcb *
   68 npcb_alloc(int wait)
   69 
   70 {
   71         struct natmpcb *npcb;
   72 
   73         npcb = malloc(sizeof(*npcb), M_PCB, wait | M_ZERO);
   74         if (npcb != NULL)
   75                 npcb->npcb_flags = NPCB_FREE;
   76         return (npcb);
   77 }
   78 
   79 
   80 /*
   81  * npcb_free: free a npcb
   82  */
   83 void
   84 npcb_free(struct natmpcb *npcb, int op)
   85 {
   86 
   87         NATM_LOCK_ASSERT();
   88 
   89         if ((npcb->npcb_flags & NPCB_FREE) == 0) {
   90                 LIST_REMOVE(npcb, pcblist);
   91                 npcb->npcb_flags = NPCB_FREE;
   92         }
   93         if (op == NPCB_DESTROY) {
   94                 if (npcb->npcb_inq) {
   95                         npcb->npcb_flags = NPCB_DRAIN;  /* flag for distruct. */
   96                 } else {
   97                         free(npcb, M_PCB);              /* kill it! */
   98                 }
   99         }
  100 }
  101 
  102 
  103 /*
  104  * npcb_add: add or remove npcb from main list
  105  *   returns npcb if ok
  106  */
  107 struct natmpcb *
  108 npcb_add(struct natmpcb *npcb, struct ifnet *ifp, u_int16_t vci, u_int8_t vpi)
  109 {
  110         struct natmpcb *cpcb = NULL;            /* current pcb */
  111 
  112         NATM_LOCK_ASSERT();
  113 
  114         /*
  115          * lookup required
  116          */
  117         LIST_FOREACH(cpcb, &natm_pcbs, pcblist)
  118                 if (ifp == cpcb->npcb_ifp && vci == cpcb->npcb_vci &&
  119                     vpi == cpcb->npcb_vpi)
  120                         break;
  121 
  122         /*
  123          * add & something already there?
  124          */
  125         if (cpcb) {
  126                 cpcb = NULL;
  127                 goto done;                      /* fail */
  128         }
  129     
  130         /*
  131          * need to allocate a pcb?
  132          */
  133         if (npcb == NULL) {
  134                 /* could be called from lower half */
  135                 cpcb = npcb_alloc(M_NOWAIT);
  136                 if (cpcb == NULL) 
  137                         goto done;                      /* fail */
  138         } else {
  139                 cpcb = npcb;
  140         }
  141 
  142         cpcb->npcb_ifp = ifp;
  143         cpcb->ipaddr.s_addr = 0;
  144         cpcb->npcb_vci = vci;
  145         cpcb->npcb_vpi = vpi;
  146         cpcb->npcb_flags = NPCB_CONNECTED;
  147 
  148         LIST_INSERT_HEAD(&natm_pcbs, cpcb, pcblist);
  149 
  150 done:
  151         return (cpcb);
  152 }
  153 
  154 #ifdef DDB
  155 DB_SHOW_COMMAND(natm, db_show_natm)
  156 {
  157         struct natmpcb *cpcb;
  158 
  159         db_printf("npcb dump:\n");
  160         LIST_FOREACH(cpcb, &natm_pcbs, pcblist) {
  161                 db_printf("if=%s, vci=%d, vpi=%d, IP=0x%x, sock=%p, "
  162                     "flags=0x%x, inq=%d\n", cpcb->npcb_ifp->if_xname,
  163                     cpcb->npcb_vci, cpcb->npcb_vpi, cpcb->ipaddr.s_addr,
  164                     cpcb->npcb_socket, cpcb->npcb_flags, cpcb->npcb_inq);
  165         }
  166 }
  167 #endif

Cache object: 4efc7ba43451aae50ac6cf36c8c62df8


[ 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.