1/*
2 *
3 *  BlueZ - Bluetooth protocol stack for Linux
4 *
5 *  Copyright (C) 2004-2009  Marcel Holtmann <marcel@holtmann.org>
6 *
7 *
8 *  This program is free software; you can redistribute it and/or modify
9 *  it under the terms of the GNU General Public License as published by
10 *  the Free Software Foundation; either version 2 of the License, or
11 *  (at your option) any later version.
12 *
13 *  This program is distributed in the hope that it will be useful,
14 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
15 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 *  GNU General Public License for more details.
17 *
18 *  You should have received a copy of the GNU General Public License
19 *  along with this program; if not, write to the Free Software
20 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
21 *
22 */
23
24#ifdef HAVE_CONFIG_H
25#include <config.h>
26#endif
27
28#include <errno.h>
29#include <unistd.h>
30#include <string.h>
31#include <sys/ioctl.h>
32#include <sys/stat.h>
33#include <sys/types.h>
34#include <net/if.h>
35#include <linux/sockios.h>
36
37#include <bluetooth/bluetooth.h>
38#include <bluetooth/l2cap.h>
39#include <bluetooth/bnep.h>
40
41#include "logging.h"
42#include "bridge.h"
43#include "common.h"
44
45static int bridge_socket = -1;
46static const char *gn_bridge = NULL;
47static const char *nap_bridge = NULL;
48
49int bridge_init(const char *gn_iface, const char *nap_iface)
50{
51#if 0
52	struct stat st;
53
54	if (stat("/sys/module/bridge", &st) < 0)
55		return -EOPNOTSUPP;
56#endif
57	bridge_socket = socket(AF_INET, SOCK_STREAM, 0);
58	if (bridge_socket < 0) {
59		error("Failed to open bridge socket: %s (%d)",
60				strerror(errno), errno);
61		return -errno;
62	}
63
64	gn_bridge = gn_iface;
65	nap_bridge = nap_iface;
66
67	return 0;
68}
69
70void bridge_cleanup(void)
71{
72	close(bridge_socket);
73
74	bridge_socket = -1;
75}
76
77int bridge_create(int id)
78{
79	int err;
80	const char *name = bridge_get_name(id);
81
82	err = ioctl(bridge_socket, SIOCBRADDBR, name);
83	if (err < 0)
84		return -errno;
85
86	info("bridge %s created", name);
87
88	return 0;
89}
90
91int bridge_remove(int id)
92{
93	int err;
94	const char *name = bridge_get_name(id);
95
96	err = bnep_if_down(name);
97	if (err < 0)
98		return err;
99
100	err = ioctl(bridge_socket, SIOCBRDELBR, name);
101	if (err < 0)
102		return -errno;
103
104	info("bridge %s removed", name);
105
106	return 0;
107}
108
109int bridge_add_interface(int id, const char *dev)
110{
111	struct ifreq ifr;
112	int err;
113	int ifindex = if_nametoindex(dev);
114	const char *name = bridge_get_name(id);
115
116	if (!name)
117		return -EINVAL;
118
119	if (ifindex == 0)
120		return -ENODEV;
121
122	memset(&ifr, 0, sizeof(ifr));
123	strncpy(ifr.ifr_name, name, IFNAMSIZ - 1);
124	ifr.ifr_ifindex = ifindex;
125
126	err = ioctl(bridge_socket, SIOCBRADDIF, &ifr);
127	if (err < 0)
128		return err;
129
130	info("bridge %s: interface %s added", name, dev);
131
132	err = bnep_if_up(name, id);
133	if (err < 0)
134		return err;
135
136	return 0;
137}
138
139const char *bridge_get_name(int id)
140{
141	if (id == BNEP_SVC_GN)
142		return gn_bridge;
143
144	if (id == BNEP_SVC_NAP)
145		return nap_bridge;
146
147	return NULL;
148}
149