Add PCICAP_{ID,NEXTPTR} to avoid using magic number
[dragonfly.git] / usr.sbin / vknetd / bridge.c
CommitLineData
dbfd168b
MD
1/*
2 * Copyright (c) 2008 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
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 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $DragonFly: src/usr.sbin/vknetd/bridge.c,v 1.1 2008/05/27 01:58:01 dillon Exp $
35 */
36/*
37 * Bridging code (serialized)
38 */
39#include "vknetd.h"
40
41static TAILQ_HEAD(, bridge) BridgeList = TAILQ_HEAD_INITIALIZER(BridgeList);
42
43/*
44 * Add the unix domain descriptor to our bridge
45 */
46bridge_t
47bridge_add(ioinfo_t io)
48{
49 bridge_t bridge;
50
51 bridge = malloc(sizeof(struct bridge));
52 bzero(bridge, sizeof(*bridge));
53 bridge->io = io;
54 TAILQ_INIT(&bridge->mac_list);
55 TAILQ_INSERT_TAIL(&BridgeList, bridge, entry);
56
57 return(bridge);
58}
59
60/*
61 * Remove the unix domain descriptor from our bridge
62 */
63void
64bridge_del(bridge_t bridge)
65{
66 mac_t mac;
67
68 TAILQ_REMOVE(&BridgeList, bridge, entry);
69
70 while ((mac = TAILQ_FIRST(&bridge->mac_list)) != NULL)
71 mac_delete(mac);
72
73 free(bridge);
74}
75
76/*
77 * Bridge a packet. The packet is in the following form:
78 *
79 * [src_mac:6][dst_mac:6][packet]
80 */
81void
82bridge_packet(bridge_t bridge, u_int8_t *pkt, int bytes)
83{
84 bridge_t scan;
85 mac_t mac;
86
87 if (mac_broadcast(pkt + 6) == 0) {
88 mac = mac_find(pkt + 6);
89 if (mac == NULL) {
90 mac_add(bridge, pkt + 6);
91 } else if (mac->bridge != bridge) {
92 mac_delete(mac);
93 mac_add(bridge, pkt + 6);
94 }
95 }
96 if (mac_broadcast(pkt + 0) == 0 && (mac = mac_find(pkt + 0)) != NULL) {
97 if (mac->bridge != bridge &&
98 (mac->bridge->io->istap == 0 || filter_ok(pkt, bytes))) {
99 write(mac->bridge->io->fd, pkt, bytes);
100 }
101 } else {
102 TAILQ_FOREACH(scan, &BridgeList, entry) {
103 if (scan != bridge &&
104 (scan->io->istap == 0 || filter_ok(pkt, bytes))) {
105 write(scan->io->fd, pkt, bytes);
106 }
107 }
108 }
109}
110