171 lines
3.5 KiB
C
171 lines
3.5 KiB
C
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright (C) 2008 John Crispin <blogic@openwrt.org>
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* Copyright (C) 2008 Steven Barth <steven@midlink.org>
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*/
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#include <string.h>
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#include <net/if.h>
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#include <linux/sockios.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/ioctl.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <lua.h>
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#include <lualib.h>
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#include <lauxlib.h>
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static int sock_bridge = 0;
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int bridge_startup()
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{
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if(!sock_bridge)
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sock_bridge = socket(AF_LOCAL, SOCK_STREAM, 0);
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return sock_bridge;
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}
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void bridge_shutdown(void)
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{
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if(!sock_bridge)
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return;
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close(sock_bridge);
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sock_bridge = 0;
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}
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static inline int _bridge_new(lua_State *L, int i)
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{
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char *ifname;
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if(lua_gettop(L) != 1)
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{
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lua_pushstring(L, "invalid arg list");
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lua_error(L);
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return 0;
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}
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ifname = (char *)lua_tostring (L, 1);
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if(!ioctl(sock_bridge, i, ifname))
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lua_pushboolean(L, 1);
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else
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lua_pushboolean(L, 0);
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return 1;
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}
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int bridge_new(lua_State *L)
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{
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return _bridge_new(L, SIOCBRADDBR);
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}
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int bridge_del(lua_State *L)
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{
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return _bridge_new(L, SIOCBRDELBR);
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}
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static inline int _bridge_addif(lua_State *L, int i)
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{
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struct ifreq ifr;
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char *br, *ifname;
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if(lua_gettop(L) != 2)
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{
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lua_pushstring(L, "invalid arg list");
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lua_error(L);
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return 0;
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}
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br = (char *)lua_tostring (L, 1);
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ifname = (char *)lua_tostring (L, 2);
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strncpy(ifr.ifr_name, br, IFNAMSIZ);
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ifr.ifr_ifindex = if_nametoindex(ifname);
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if(ifr.ifr_ifindex == 0)
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{
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lua_pushboolean(L, 0);
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return 1;
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}
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if(!ioctl(sock_bridge, i, &ifr))
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lua_pushboolean(L, 1);
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else
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lua_pushboolean(L, 0);
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return 1;
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}
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int bridge_addif(lua_State *L)
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{
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return _bridge_addif(L, SIOCBRADDIF);
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}
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int bridge_delif(lua_State *L)
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{
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return _bridge_addif(L, SIOCBRDELIF);
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}
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#define SYSFS_PATH_MAX 512
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#define SYSFS_CLASS_NET "/sys/class/net/"
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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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static int isdev(const struct dirent *entry)
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{
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if(*entry->d_name == '.')
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return 0;
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return 1;
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}
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static inline void bridge_getifs(lua_State *L, const char *ifname)
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{
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struct dirent **namelist;
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int i, count = 0;
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char path[SYSFS_PATH_MAX];
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snprintf(path, SYSFS_PATH_MAX, SYSFS_CLASS_NET "%s/brif", ifname);
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count = scandir(path, &namelist, isdev, alphasort);
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if(count < 0)
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return;
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for(i = 0; i < count; i++)
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{
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lua_pushinteger(L, i + 1);
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lua_pushstring(L, namelist[i]->d_name);
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lua_settable(L, -3);
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free(namelist[i]);
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}
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free(namelist);
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return;
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}
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int bridge_getall(lua_State *L)
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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 0;
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lua_newtable(L);
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for (i = 0; i < count; i++)
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{
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lua_pushstring(L, namelist[i]->d_name);
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lua_newtable(L);
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bridge_getifs(L, namelist[i]->d_name);
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free(namelist[i]);
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lua_settable(L, -3);
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}
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free(namelist);
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return 1;
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}
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