--- /dev/null
+/*
+ * Copyright (C) 2000 Lennert Buytenhek
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <dirent.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "libbridge.h"
+#include "libbridge_private.h"
+
+int br_socket_fd = -1;
+
+static int br_init(void)
+{
+ if ((br_socket_fd = socket(AF_LOCAL, SOCK_STREAM, 0)) < 0)
+ return errno;
+ return 0;
+}
+
+static void br_shutdown(void)
+{
+ close(br_socket_fd);
+ br_socket_fd = -1;
+}
+
+/* If /sys/class/net/XXX/bridge exists then it must be a bridge */
+static int isbridge(const struct dirent *entry)
+{
+ char path[SYSFS_PATH_MAX];
+ struct stat st;
+
+ snprintf(path, SYSFS_PATH_MAX, SYSFS_CLASS_NET "%s/bridge", entry->d_name);
+ return stat(path, &st) == 0 && S_ISDIR(st.st_mode);
+}
+
+/*
+ * New interface uses sysfs to find bridges
+ */
+static int new_foreach_bridge(int (*iterator)(const char *name, void *),
+ void *arg)
+{
+ struct dirent **namelist;
+ int i, count = 0;
+
+ count = scandir(SYSFS_CLASS_NET, &namelist, isbridge, alphasort);
+ if (count < 0)
+ return -1;
+
+ for (i = 0; i < count; i++) {
+ if (iterator(namelist[i]->d_name, arg))
+ break;
+ }
+
+ for (i = 0; i < count; i++)
+ free(namelist[i]);
+ free(namelist);
+
+ return count;
+}
+
+/*
+ * Old interface uses ioctl
+ */
+static int old_foreach_bridge(int (*iterator)(const char *, void *),
+ void *iarg)
+{
+ int i, ret=0, num;
+ char ifname[IFNAMSIZ];
+ int ifindices[MAX_BRIDGES];
+ unsigned long args[3] = { BRCTL_GET_BRIDGES,
+ (unsigned long)ifindices, MAX_BRIDGES };
+
+ num = ioctl(br_socket_fd, SIOCGIFBR, args);
+ if (num < 0) {
+ dprintf("Get bridge indices failed: %s\n",
+ strerror(errno));
+ return -errno;
+ }
+
+ for (i = 0; i < num; i++) {
+ if (!if_indextoname(ifindices[i], ifname)) {
+ dprintf("get find name for ifindex %d\n",
+ ifindices[i]);
+ return -errno;
+ }
+
+ ++ret;
+ if(iterator(ifname, iarg))
+ break;
+ }
+
+ return ret;
+
+}
+
+/*
+ * Go over all bridges and call iterator function.
+ * if iterator returns non-zero then stop.
+ */
+static int br_foreach_bridge(int (*iterator)(const char *, void *),
+ void *arg)
+{
+ int ret;
+
+ ret = new_foreach_bridge(iterator, arg);
+ if (ret <= 0)
+ ret = old_foreach_bridge(iterator, arg);
+
+ return ret;
+}
+
+/*
+ * Only used if sysfs is not available.
+ */
+static int old_foreach_port(const char *brname,
+ int (*iterator)(const char *br, const char *port,
+ void *arg),
+ void *arg)
+{
+ int i, err, count;
+ struct ifreq ifr;
+ char ifname[IFNAMSIZ];
+ int ifindices[MAX_PORTS];
+ unsigned long args[4] = { BRCTL_GET_PORT_LIST,
+ (unsigned long)ifindices, MAX_PORTS, 0 };
+
+ memset(ifindices, 0, sizeof(ifindices));
+ strncpy(ifr.ifr_name, brname, IFNAMSIZ);
+ ifr.ifr_data = (char *) &args;
+
+ err = ioctl(br_socket_fd, SIOCDEVPRIVATE, &ifr);
+ if (err < 0) {
+ dprintf("list ports for bridge:'%s' failed: %s\n",
+ brname, strerror(errno));
+ return -errno;
+ }
+
+ count = 0;
+ for (i = 0; i < MAX_PORTS; i++) {
+ if (!ifindices[i])
+ continue;
+
+ if (!if_indextoname(ifindices[i], ifname)) {
+ dprintf("can't find name for ifindex:%d\n",
+ ifindices[i]);
+ continue;
+ }
+
+ ++count;
+ if (iterator(brname, ifname, arg))
+ break;
+ }
+
+ return count;
+}
+
+/*
+ * Iterate over all ports in bridge (using sysfs).
+ */
+static int br_foreach_port(const char *brname,
+ int (*iterator)(const char *br, const char *port, void *arg),
+ void *arg)
+{
+ int i, count;
+ struct dirent **namelist;
+ char path[SYSFS_PATH_MAX];
+
+ snprintf(path, SYSFS_PATH_MAX, SYSFS_CLASS_NET "%s/brif", brname);
+ count = scandir(path, &namelist, 0, alphasort);
+ if (count < 0)
+ return old_foreach_port(brname, iterator, arg);
+
+ for (i = 0; i < count; i++) {
+ if (namelist[i]->d_name[0] == '.'
+ && (namelist[i]->d_name[1] == '\0'
+ || (namelist[i]->d_name[1] == '.'
+ && namelist[i]->d_name[2] == '\0')))
+ continue;
+
+ if (iterator(brname, namelist[i]->d_name, arg))
+ break;
+ }
+ for (i = 0; i < count; i++)
+ free(namelist[i]);
+ free(namelist);
+
+ return count;
+}
projects / openwrt / staging / mkresin.git / blobdiff