spl->critical section conversion.
[dragonfly.git] / sys / netproto / natm / natm_pcb.c
CommitLineData
984263bc 1/* $FreeBSD: src/sys/netnatm/natm_pcb.c,v 1.6.6.1 2000/08/03 18:56:28 peter Exp $ */
68b13d6b 2/* $DragonFly: src/sys/netproto/natm/natm_pcb.c,v 1.5 2005/06/10 22:34:51 dillon Exp $ */
984263bc
MD
3/* $NetBSD: natm_pcb.c,v 1.4 1996/11/09 03:26:27 chuck Exp $ */
4
5/*
6 *
7 * Copyright (c) 1996 Charles D. Cranor and Washington University.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
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.
24 *
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.
35 */
36
37/*
38 * atm_pcb.c: manage atm protocol control blocks and keep IP and NATM
39 * from trying to use each other's VCs.
40 */
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>
68b13d6b 47#include <sys/thread2.h>
984263bc
MD
48
49#include <net/if.h>
50
51#include <netinet/in.h>
52
1f2de5d4 53#include "natm.h"
984263bc
MD
54
55struct npcblist natm_pcbs;
56
57/*
58 * npcb_alloc: allocate a npcb [in the free state]
59 */
60
61struct natmpcb *npcb_alloc(wait)
62
63int wait;
64
65{
66 struct natmpcb *npcb;
67
68 MALLOC(npcb, struct natmpcb *, sizeof(*npcb), M_PCB, wait);
69
70#ifdef DIAGNOSTIC
71 if (wait == M_WAITOK && npcb == NULL) panic("npcb_alloc: malloc didn't wait");
72#endif
73
74 if (npcb) {
75 bzero(npcb, sizeof(*npcb));
76 npcb->npcb_flags = NPCB_FREE;
77 }
78 return(npcb);
79}
80
81
82/*
83 * npcb_free: free a npcb
84 */
85
86void npcb_free(npcb, op)
87
88struct natmpcb *npcb;
89int op;
90
91{
68b13d6b 92 crit_enter();
984263bc
MD
93
94 if ((npcb->npcb_flags & NPCB_FREE) == 0) {
95 LIST_REMOVE(npcb, pcblist);
96 npcb->npcb_flags = NPCB_FREE;
97 }
98 if (op == NPCB_DESTROY) {
99 if (npcb->npcb_inq) {
100 npcb->npcb_flags = NPCB_DRAIN; /* flag for distruction */
101 } else {
102 FREE(npcb, M_PCB); /* kill it! */
103 }
104 }
105
68b13d6b 106 crit_exit();
984263bc
MD
107}
108
109
110/*
111 * npcb_add: add or remove npcb from main list
112 * returns npcb if ok
113 */
114
115struct natmpcb *npcb_add(npcb, ifp, vci, vpi)
116
117struct natmpcb *npcb;
118struct ifnet *ifp;
119u_int16_t vci;
120u_int8_t vpi;
121
122{
123 struct natmpcb *cpcb = NULL; /* current pcb */
984263bc 124
68b13d6b 125 crit_enter();
984263bc
MD
126 /*
127 * lookup required
128 */
129
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)
133 break;
134 }
135
136 /*
137 * add & something already there?
138 */
139
140 if (cpcb) {
141 cpcb = NULL;
142 goto done; /* fail */
143 }
144
145 /*
146 * need to allocate a pcb?
147 */
148
149 if (npcb == NULL) {
150 cpcb = npcb_alloc(M_NOWAIT); /* could be called from lower half */
151 if (cpcb == NULL)
152 goto done; /* fail */
153 } else {
154 cpcb = npcb;
155 }
156
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;
162
163 LIST_INSERT_HEAD(&natm_pcbs, cpcb, pcblist);
164
165done:
68b13d6b 166 crit_exit();
984263bc
MD
167 return(cpcb);
168}
169
170
171
172#ifdef DDB
173
3e0c9cba 174int npcb_dump (void);
984263bc
MD
175
176int npcb_dump()
177
178{
179 struct natmpcb *cpcb;
180
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);
188 }
189 printf("done\n");
190 return(0);
191}
192
193#endif