1 /* $FreeBSD: src/sys/netnatm/natm_pcb.c,v 1.6.6.1 2000/08/03 18:56:28 peter Exp $ */
2 /* $DragonFly: src/sys/netproto/natm/natm_pcb.c,v 1.4 2003/08/23 10:06:24 rob Exp $ */
3 /* $NetBSD: natm_pcb.c,v 1.4 1996/11/09 03:26:27 chuck Exp $ */
7 * Copyright (c) 1996 Charles D. Cranor and Washington University.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by Charles D. Cranor and
21 * Washington University.
22 * 4. The name of the author may not be used to endorse or promote products
23 * derived from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 * atm_pcb.c: manage atm protocol control blocks and keep IP and NATM
39 * from trying to use each other's VCs.
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>
50 #include <netinet/in.h>
54 struct npcblist natm_pcbs;
57 * npcb_alloc: allocate a npcb [in the free state]
60 struct natmpcb *npcb_alloc(wait)
67 MALLOC(npcb, struct natmpcb *, sizeof(*npcb), M_PCB, wait);
70 if (wait == M_WAITOK && npcb == NULL) panic("npcb_alloc: malloc didn't wait");
74 bzero(npcb, sizeof(*npcb));
75 npcb->npcb_flags = NPCB_FREE;
82 * npcb_free: free a npcb
85 void npcb_free(npcb, op)
93 if ((npcb->npcb_flags & NPCB_FREE) == 0) {
94 LIST_REMOVE(npcb, pcblist);
95 npcb->npcb_flags = NPCB_FREE;
97 if (op == NPCB_DESTROY) {
99 npcb->npcb_flags = NPCB_DRAIN; /* flag for distruction */
101 FREE(npcb, M_PCB); /* kill it! */
110 * npcb_add: add or remove npcb from main list
114 struct natmpcb *npcb_add(npcb, ifp, vci, vpi)
116 struct natmpcb *npcb;
122 struct natmpcb *cpcb = NULL; /* current pcb */
130 for (cpcb = natm_pcbs.lh_first ; cpcb != NULL ;
131 cpcb = cpcb->pcblist.le_next) {
132 if (ifp == cpcb->npcb_ifp && vci == cpcb->npcb_vci && vpi == cpcb->npcb_vpi)
137 * add & something already there?
142 goto done; /* fail */
146 * need to allocate a pcb?
150 cpcb = npcb_alloc(M_NOWAIT); /* could be called from lower half */
152 goto done; /* fail */
157 cpcb->npcb_ifp = ifp;
158 cpcb->ipaddr.s_addr = 0;
159 cpcb->npcb_vci = vci;
160 cpcb->npcb_vpi = vpi;
161 cpcb->npcb_flags = NPCB_CONNECTED;
163 LIST_INSERT_HEAD(&natm_pcbs, cpcb, pcblist);
174 int npcb_dump (void);
179 struct natmpcb *cpcb;
181 printf("npcb dump:\n");
182 for (cpcb = natm_pcbs.lh_first ; cpcb != NULL ;
183 cpcb = cpcb->pcblist.le_next) {
184 printf("if=%s, vci=%d, vpi=%d, IP=0x%x, sock=%p, flags=0x%x, inq=%d\n",
185 cpcb->npcb_ifp->if_xname, cpcb->npcb_vci, cpcb->npcb_vpi,
186 cpcb->ipaddr.s_addr, cpcb->npcb_socket,
187 cpcb->npcb_flags, cpcb->npcb_inq);