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util-src/net.c @ 9781:161411a41377
util.prosodyctl: Allow passing path to Lua runtime to the start() function
By default the shebang is used. Being able to override it is useful in
cases where the shebang does not match the configured runtime.
author | Kim Alvefur <zash@zash.se> |
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date | Thu, 10 Jan 2019 14:57:26 +0100 |
parent | 9150:c1d5f52274cf |
child | 10480:94cacf9fd0ae |
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/* Prosody IM -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- -- Copyright (C) 2012 Paul Aurich -- Copyright (C) 2013 Matthew Wild -- Copyright (C) 2013 Florian Zeitz -- */ #ifndef _GNU_SOURCE #define _GNU_SOURCE #endif #include <stddef.h> #include <string.h> #include <errno.h> #ifndef _WIN32 #include <sys/ioctl.h> #include <sys/types.h> #include <sys/socket.h> #include <net/if.h> #include <ifaddrs.h> #include <arpa/inet.h> #include <netinet/in.h> #endif #include <lua.h> #include <lauxlib.h> #if (LUA_VERSION_NUM == 501) #define luaL_setfuncs(L, R, N) luaL_register(L, NULL, R) #endif /* Enumerate all locally configured IP addresses */ const char *const type_strings[] = { "both", "ipv4", "ipv6", NULL }; static int lc_local_addresses(lua_State *L) { #ifndef _WIN32 /* Link-local IPv4 addresses; see RFC 3927 and RFC 5735 */ const long ip4_linklocal = htonl(0xa9fe0000); /* 169.254.0.0 */ const long ip4_mask = htonl(0xffff0000); struct ifaddrs *addr = NULL, *a; #endif int n = 1; int type = luaL_checkoption(L, 1, "both", type_strings); const char link_local = lua_toboolean(L, 2); /* defaults to 0 (false) */ const char ipv4 = (type == 0 || type == 1); const char ipv6 = (type == 0 || type == 2); #ifndef _WIN32 if(getifaddrs(&addr) < 0) { lua_pushnil(L); lua_pushfstring(L, "getifaddrs failed (%d): %s", errno, strerror(errno)); return 2; } #endif lua_newtable(L); #ifndef _WIN32 for(a = addr; a; a = a->ifa_next) { int family; char ipaddr[INET6_ADDRSTRLEN]; const char *tmp = NULL; if(a->ifa_addr == NULL || a->ifa_flags & IFF_LOOPBACK) { continue; } family = a->ifa_addr->sa_family; if(ipv4 && family == AF_INET) { struct sockaddr_in *sa = (struct sockaddr_in *)a->ifa_addr; if(!link_local && ((sa->sin_addr.s_addr & ip4_mask) == ip4_linklocal)) { continue; } tmp = inet_ntop(family, &sa->sin_addr, ipaddr, sizeof(ipaddr)); } else if(ipv6 && family == AF_INET6) { struct sockaddr_in6 *sa = (struct sockaddr_in6 *)a->ifa_addr; if(!link_local && IN6_IS_ADDR_LINKLOCAL(&sa->sin6_addr)) { continue; } if(IN6_IS_ADDR_V4MAPPED(&sa->sin6_addr) || IN6_IS_ADDR_V4COMPAT(&sa->sin6_addr)) { continue; } tmp = inet_ntop(family, &sa->sin6_addr, ipaddr, sizeof(ipaddr)); } if(tmp != NULL) { lua_pushstring(L, tmp); lua_rawseti(L, -2, n++); } /* TODO: Error reporting? */ } freeifaddrs(addr); #else if(ipv4) { lua_pushstring(L, "0.0.0.0"); lua_rawseti(L, -2, n++); } if(ipv6) { lua_pushstring(L, "::"); lua_rawseti(L, -2, n++); } #endif return 1; } static int lc_pton(lua_State *L) { char buf[16]; const char *ipaddr = luaL_checkstring(L, 1); int errno_ = 0; int family = strchr(ipaddr, ':') ? AF_INET6 : AF_INET; switch(inet_pton(family, ipaddr, &buf)) { case 1: lua_pushlstring(L, buf, family == AF_INET6 ? 16 : 4); return 1; case -1: errno_ = errno; lua_pushnil(L); lua_pushstring(L, strerror(errno_)); lua_pushinteger(L, errno_); return 3; default: case 0: lua_pushnil(L); lua_pushstring(L, strerror(EINVAL)); lua_pushinteger(L, EINVAL); return 3; } } static int lc_ntop(lua_State *L) { char buf[INET6_ADDRSTRLEN]; int family; int errno_; size_t l; const char *ipaddr = luaL_checklstring(L, 1, &l); if(l == 16) { family = AF_INET6; } else if(l == 4) { family = AF_INET; } else { lua_pushnil(L); lua_pushstring(L, strerror(EAFNOSUPPORT)); lua_pushinteger(L, EAFNOSUPPORT); return 3; } if(!inet_ntop(family, ipaddr, buf, INET6_ADDRSTRLEN)) { errno_ = errno; lua_pushnil(L); lua_pushstring(L, strerror(errno_)); lua_pushinteger(L, errno_); return 3; } lua_pushstring(L, (const char *)(&buf)); return 1; } int luaopen_util_net(lua_State *L) { #if (LUA_VERSION_NUM > 501) luaL_checkversion(L); #endif luaL_Reg exports[] = { { "local_addresses", lc_local_addresses }, { "pton", lc_pton }, { "ntop", lc_ntop }, { NULL, NULL } }; lua_createtable(L, 0, 1); luaL_setfuncs(L, exports, 0); return 1; }