1/* $NetBSD: natm_pcb.c,v 1.13 2009/03/18 16:00:24 cegger 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28/* 29 * atm_pcb.c: manage atm protocol control blocks and keep IP and NATM 30 * from trying to use each other's VCs. 31 */ 32 33#include <sys/cdefs.h> 34__KERNEL_RCSID(0, "$NetBSD: natm_pcb.c,v 1.13 2009/03/18 16:00:24 cegger Exp $"); 35 36#include "opt_ddb.h" 37 38#include <sys/param.h> 39#include <sys/systm.h> 40#include <sys/queue.h> 41#include <sys/socket.h> 42#include <sys/protosw.h> 43#include <sys/domain.h> 44#include <sys/mbuf.h> 45#include <sys/malloc.h> 46 47#include <net/if.h> 48#include <net/radix.h> 49#include <net/route.h> 50 51#include <netinet/in.h> 52 53#include <netnatm/natm.h> 54 55/* 56 * npcb_alloc: allocate a npcb [in the free state] 57 */ 58 59struct natmpcb *npcb_alloc(wait) 60 61int wait; 62 63{ 64 struct natmpcb *npcb; 65 66 npcb = malloc(sizeof(*npcb), M_PCB, wait); 67 68#ifdef DIAGNOSTIC 69 if (wait == M_WAITOK && npcb == NULL) panic("npcb_alloc: malloc didn't wait"); 70#endif 71 72 if (npcb) { 73 memset(npcb, 0, sizeof(*npcb)); 74 npcb->npcb_flags = NPCB_FREE; 75 } 76 return(npcb); 77} 78 79 80/* 81 * npcb_free: free a npcb 82 */ 83 84void npcb_free(npcb, op) 85 86struct natmpcb *npcb; 87int op; 88 89{ 90 int s = splnet(); 91 92 if ((npcb->npcb_flags & NPCB_FREE) == 0) { 93 LIST_REMOVE(npcb, pcblist); 94 npcb->npcb_flags = NPCB_FREE; 95 } 96 if (op == NPCB_DESTROY) { 97 if (npcb->npcb_inq) { 98 npcb->npcb_flags = NPCB_DRAIN; /* flag for distruction */ 99 } else { 100 free(npcb, M_PCB); /* kill it! */ 101 } 102 } 103 104 splx(s); 105} 106 107 108/* 109 * npcb_add: add or remove npcb from main list 110 * returns npcb if ok 111 */ 112 113struct natmpcb *npcb_add(npcb, ifp, vci, vpi) 114 115struct natmpcb *npcb; 116struct ifnet *ifp; 117u_int16_t vci; 118u_int8_t vpi; 119 120{ 121 struct natmpcb *cpcb = NULL; /* current pcb */ 122 int s = splnet(); 123 124 125 /* 126 * lookup required 127 */ 128 129 for (cpcb = natm_pcbs.lh_first ; cpcb != NULL ; 130 cpcb = cpcb->pcblist.le_next) { 131 if (ifp == cpcb->npcb_ifp && vci == cpcb->npcb_vci && vpi == cpcb->npcb_vpi) 132 break; 133 } 134 135 /* 136 * add & something already there? 137 */ 138 139 if (cpcb) { 140 cpcb = NULL; 141 goto done; /* fail */ 142 } 143 144 /* 145 * need to allocate a pcb? 146 */ 147 148 if (npcb == NULL) { 149 cpcb = npcb_alloc(M_NOWAIT); /* could be called from lower half */ 150 if (cpcb == NULL) 151 goto done; /* fail */ 152 } else { 153 cpcb = npcb; 154 } 155 156 cpcb->npcb_ifp = ifp; 157 cpcb->ipaddr.s_addr = 0; 158 cpcb->npcb_vci = vci; 159 cpcb->npcb_vpi = vpi; 160 cpcb->npcb_flags = NPCB_CONNECTED; 161 162 LIST_INSERT_HEAD(&natm_pcbs, cpcb, pcblist); 163 164done: 165 splx(s); 166 return(cpcb); 167} 168 169 170 171#ifdef DDB 172 173int npcb_dump(void); 174 175int npcb_dump(void) 176 177{ 178 struct natmpcb *cpcb; 179 180 printf("npcb dump:\n"); 181 for (cpcb = natm_pcbs.lh_first ; cpcb != NULL ; 182 cpcb = cpcb->pcblist.le_next) { 183 printf("if=%s, vci=%d, vpi=%d, IP=0x%x, sock=%p, flags=0x%x, inq=%d\n", 184 cpcb->npcb_ifp->if_xname, cpcb->npcb_vci, cpcb->npcb_vpi, 185 cpcb->ipaddr.s_addr, cpcb->npcb_socket, 186 cpcb->npcb_flags, cpcb->npcb_inq); 187 } 188 printf("done\n"); 189 return(0); 190} 191 192#endif 193