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128 lines
2.9 KiB
C
128 lines
2.9 KiB
C
/*
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* Copyright (C) 2000 Lennert Buytenhek
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifdef linux
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <dirent.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <linux/if.h>
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#include <linux/in6.h>
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#include <linux/if_bridge.h>
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#include "libbridge.h"
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#include "libbridge_private.h"
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static int br_socket_fd = -1;
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int br_init(void)
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{
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if ((br_socket_fd = socket(AF_LOCAL, SOCK_STREAM, 0)) < 0)
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return errno;
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return 0;
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}
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void br_shutdown(void)
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{
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close(br_socket_fd);
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br_socket_fd = -1;
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}
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/* If /sys/class/net/XXX/bridge exists then it must be a bridge */
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static int isbridge(const struct dirent *entry)
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{
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char path[SYSFS_PATH_MAX];
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struct stat st;
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snprintf(path, SYSFS_PATH_MAX, SYSFS_CLASS_NET "%s/bridge", entry->d_name);
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return stat(path, &st) == 0 && S_ISDIR(st.st_mode);
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}
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/*
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* New interface uses sysfs to find bridges
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*/
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static int new_foreach_bridge(int (*iterator)(const char *name, void *),
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void *arg)
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{
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struct dirent **namelist;
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int i, count = 0;
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count = scandir(SYSFS_CLASS_NET, &namelist, isbridge, alphasort);
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if (count < 0)
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return -1;
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for (i = 0; i < count; i++) {
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if (iterator(namelist[i]->d_name, arg))
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break;
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}
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for (i = 0; i < count; i++)
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free(namelist[i]);
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free(namelist);
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return count;
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}
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/*
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* Go over all bridges and call iterator function.
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* if iterator returns non-zero then stop.
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*/
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int br_foreach_bridge(int (*iterator)(const char *, void *), void *arg)
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{
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return new_foreach_bridge(iterator, arg);
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}
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/*
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* Iterate over all ports in bridge (using sysfs).
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*/
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int br_foreach_port(const char *brname,
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int (*iterator)(const char *br, const char *port, void *arg),
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void *arg)
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{
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int i, count;
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struct dirent **namelist;
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char path[SYSFS_PATH_MAX];
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snprintf(path, SYSFS_PATH_MAX, SYSFS_CLASS_NET "%s/brif", brname);
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count = scandir(path, &namelist, 0, alphasort);
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for (i = 0; i < count; i++) {
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if (namelist[i]->d_name[0] == '.'
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&& (namelist[i]->d_name[1] == '\0'
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|| (namelist[i]->d_name[1] == '.'
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&& namelist[i]->d_name[2] == '\0')))
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continue;
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if (iterator(brname, namelist[i]->d_name, arg))
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break;
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}
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for (i = 0; i < count; i++)
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free(namelist[i]);
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free(namelist);
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return count;
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}
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#endif
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