2 * Copyright (c) 1996 Charles D. Cranor and Washington University.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
31 * $NetBSD: natm_pcb.c,v 1.4 1996/11/09 03:26:27 chuck Exp $
35 * atm_pcb.c: manage atm protocol control blocks and keep IP and NATM
36 * from trying to use each other's VCs.
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
44 #include <sys/param.h>
45 #include <sys/kernel.h>
46 #include <sys/malloc.h>
47 #include <sys/systm.h>
48 #include <sys/socket.h>
49 #include <sys/socketvar.h>
53 #include <netinet/in.h>
55 #include <netnatm/natm.h>
59 struct npcblist natm_pcbs;
62 * npcb_alloc: allocate a npcb [in the free state]
70 npcb = malloc(sizeof(*npcb), M_PCB, wait | M_ZERO);
72 npcb->npcb_flags = NPCB_FREE;
78 * npcb_free: free a npcb
81 npcb_free(struct natmpcb *npcb, int op)
86 if ((npcb->npcb_flags & NPCB_FREE) == 0) {
87 LIST_REMOVE(npcb, pcblist);
88 npcb->npcb_flags = NPCB_FREE;
90 if (op == NPCB_DESTROY) {
92 npcb->npcb_flags = NPCB_DRAIN; /* flag for distruct. */
94 FREE(npcb, M_PCB); /* kill it! */
101 * npcb_add: add or remove npcb from main list
105 npcb_add(struct natmpcb *npcb, struct ifnet *ifp, u_int16_t vci, u_int8_t vpi)
107 struct natmpcb *cpcb = NULL; /* current pcb */
114 LIST_FOREACH(cpcb, &natm_pcbs, pcblist)
115 if (ifp == cpcb->npcb_ifp && vci == cpcb->npcb_vci &&
116 vpi == cpcb->npcb_vpi)
120 * add & something already there?
124 goto done; /* fail */
128 * need to allocate a pcb?
131 /* could be called from lower half */
132 cpcb = npcb_alloc(M_NOWAIT);
134 goto done; /* fail */
139 cpcb->npcb_ifp = ifp;
140 cpcb->ipaddr.s_addr = 0;
141 cpcb->npcb_vci = vci;
142 cpcb->npcb_vpi = vpi;
143 cpcb->npcb_flags = NPCB_CONNECTED;
145 LIST_INSERT_HEAD(&natm_pcbs, cpcb, pcblist);
152 DB_SHOW_COMMAND(natm, db_show_natm)
154 struct natmpcb *cpcb;
156 db_printf("npcb dump:\n");
157 LIST_FOREACH(cpcb, &natm_pcbs, pcblist) {
158 db_printf("if=%s, vci=%d, vpi=%d, IP=0x%x, sock=%p, "
159 "flags=0x%x, inq=%d\n", cpcb->npcb_ifp->if_xname,
160 cpcb->npcb_vci, cpcb->npcb_vpi, cpcb->ipaddr.s_addr,
161 cpcb->npcb_socket, cpcb->npcb_flags, cpcb->npcb_inq);