2 * Copyright (C) 2000 Lennert Buytenhek
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include <sys/types.h>
28 #include "libbridge.h"
29 #include "libbridge_private.h"
31 int br_socket_fd = -1;
33 static int br_init(void)
35 if ((br_socket_fd = socket(AF_LOCAL, SOCK_STREAM, 0)) < 0)
40 static void br_shutdown(void)
46 /* If /sys/class/net/XXX/bridge exists then it must be a bridge */
47 static int isbridge(const struct dirent *entry)
49 char path[SYSFS_PATH_MAX];
52 snprintf(path, SYSFS_PATH_MAX, SYSFS_CLASS_NET "%s/bridge", entry->d_name);
53 return stat(path, &st) == 0 && S_ISDIR(st.st_mode);
57 * New interface uses sysfs to find bridges
59 static int new_foreach_bridge(int (*iterator)(const char *name, void *),
62 struct dirent **namelist;
65 count = scandir(SYSFS_CLASS_NET, &namelist, isbridge, alphasort);
69 for (i = 0; i < count; i++) {
70 if (iterator(namelist[i]->d_name, arg))
74 for (i = 0; i < count; i++)
82 * Old interface uses ioctl
84 static int old_foreach_bridge(int (*iterator)(const char *, void *),
88 char ifname[IFNAMSIZ];
89 int ifindices[MAX_BRIDGES];
90 unsigned long args[3] = { BRCTL_GET_BRIDGES,
91 (unsigned long)ifindices, MAX_BRIDGES };
93 num = ioctl(br_socket_fd, SIOCGIFBR, args);
95 dprintf("Get bridge indices failed: %s\n",
100 for (i = 0; i < num; i++) {
101 if (!if_indextoname(ifindices[i], ifname)) {
102 dprintf("get find name for ifindex %d\n",
108 if(iterator(ifname, iarg))
117 * Go over all bridges and call iterator function.
118 * if iterator returns non-zero then stop.
120 static int br_foreach_bridge(int (*iterator)(const char *, void *),
125 ret = new_foreach_bridge(iterator, arg);
127 ret = old_foreach_bridge(iterator, arg);
133 * Only used if sysfs is not available.
135 static int old_foreach_port(const char *brname,
136 int (*iterator)(const char *br, const char *port,
142 char ifname[IFNAMSIZ];
143 int ifindices[MAX_PORTS];
144 unsigned long args[4] = { BRCTL_GET_PORT_LIST,
145 (unsigned long)ifindices, MAX_PORTS, 0 };
147 memset(ifindices, 0, sizeof(ifindices));
148 strncpy(ifr.ifr_name, brname, IFNAMSIZ);
149 ifr.ifr_data = (char *) &args;
151 err = ioctl(br_socket_fd, SIOCDEVPRIVATE, &ifr);
153 dprintf("list ports for bridge:'%s' failed: %s\n",
154 brname, strerror(errno));
159 for (i = 0; i < MAX_PORTS; i++) {
163 if (!if_indextoname(ifindices[i], ifname)) {
164 dprintf("can't find name for ifindex:%d\n",
170 if (iterator(brname, ifname, arg))
178 * Iterate over all ports in bridge (using sysfs).
180 static int br_foreach_port(const char *brname,
181 int (*iterator)(const char *br, const char *port, void *arg),
185 struct dirent **namelist;
186 char path[SYSFS_PATH_MAX];
188 snprintf(path, SYSFS_PATH_MAX, SYSFS_CLASS_NET "%s/brif", brname);
189 count = scandir(path, &namelist, 0, alphasort);
191 return old_foreach_port(brname, iterator, arg);
193 for (i = 0; i < count; i++) {
194 if (namelist[i]->d_name[0] == '.'
195 && (namelist[i]->d_name[1] == '\0'
196 || (namelist[i]->d_name[1] == '.'
197 && namelist[i]->d_name[2] == '\0')))
200 if (iterator(brname, namelist[i]->d_name, arg))
203 for (i = 0; i < count; i++)