prosody
29d2dd705148
util-src/net.c

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util-src/net.c @ 6043:29d2dd705148

util.dependencies: Log error when LuaExpat is not capable of enforcing stanza size limits
author Matthew Wild <mwild1@gmail.com>
date Sun, 30 Mar 2014 09:15:28 +0100
parent 5810:99ad8d42d0c9
child 6411:6c8f6364bc48
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rev   line source
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1 /* Prosody IM
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2 --
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3 -- This project is MIT/X11 licensed. Please see the
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4 -- COPYING file in the source package for more information.
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5 --
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6 -- Copyright (C) 2012 Paul Aurich
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7 -- Copyright (C) 2013 Matthew Wild
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8 -- Copyright (C) 2013 Florian Zeitz
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9 --
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10 */
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11
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12 #include <stddef.h>
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13 #include <string.h>
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14 #include <errno.h>
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15
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16 #ifndef _WIN32
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17 #include <sys/ioctl.h>
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18 #include <sys/types.h>
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19 #include <sys/socket.h>
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20 #include <net/if.h>
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21 #include <ifaddrs.h>
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22 #include <arpa/inet.h>
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23 #include <netinet/in.h>
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24 #endif
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25
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26 #include <lua.h>
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27 #include <lauxlib.h>
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28
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29 /* Enumerate all locally configured IP addresses */
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30
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31 const char * const type_strings[] = {
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32 "both",
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33 "ipv4",
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34 "ipv6",
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35 NULL
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36 };
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37
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38 static int lc_local_addresses(lua_State *L)
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39 {
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40 #ifndef _WIN32
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41 /* Link-local IPv4 addresses; see RFC 3927 and RFC 5735 */
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42 const long ip4_linklocal = htonl(0xa9fe0000); /* 169.254.0.0 */
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43 const long ip4_mask = htonl(0xffff0000);
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44 struct ifaddrs *addr = NULL, *a;
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45 #endif
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46 int n = 1;
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47 int type = luaL_checkoption(L, 1, "both", type_strings);
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48 const char link_local = lua_toboolean(L, 2); /* defaults to 0 (false) */
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49 const char ipv4 = (type == 0 || type == 1);
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50 const char ipv6 = (type == 0 || type == 2);
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51
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52 #ifndef _WIN32
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53 if (getifaddrs(&addr) < 0) {
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54 lua_pushnil(L);
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55 lua_pushfstring(L, "getifaddrs failed (%d): %s", errno,
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56 strerror(errno));
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57 return 2;
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58 }
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59 #endif
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60 lua_newtable(L);
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61
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62 #ifndef _WIN32
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63 for (a = addr; a; a = a->ifa_next) {
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64 int family;
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65 char ipaddr[INET6_ADDRSTRLEN];
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66 const char *tmp = NULL;
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67
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68 if (a->ifa_addr == NULL || a->ifa_flags & IFF_LOOPBACK)
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69 continue;
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70
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71 family = a->ifa_addr->sa_family;
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72
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73 if (ipv4 && family == AF_INET) {
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74 struct sockaddr_in *sa = (struct sockaddr_in *)a->ifa_addr;
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75 if (!link_local &&((sa->sin_addr.s_addr & ip4_mask) == ip4_linklocal))
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76 continue;
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77 tmp = inet_ntop(family, &sa->sin_addr, ipaddr, sizeof(ipaddr));
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78 } else if (ipv6 && family == AF_INET6) {
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79 struct sockaddr_in6 *sa = (struct sockaddr_in6 *)a->ifa_addr;
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80 if (!link_local && IN6_IS_ADDR_LINKLOCAL(&sa->sin6_addr))
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81 continue;
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82 if (IN6_IS_ADDR_V4MAPPED(&sa->sin6_addr) || IN6_IS_ADDR_V4COMPAT(&sa->sin6_addr))
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83 continue;
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84 tmp = inet_ntop(family, &sa->sin6_addr, ipaddr, sizeof(ipaddr));
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85 }
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86
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87 if (tmp != NULL) {
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88 lua_pushstring(L, tmp);
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89 lua_rawseti(L, -2, n++);
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90 }
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91 /* TODO: Error reporting? */
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92 }
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93
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94 freeifaddrs(addr);
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95 #else
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96 if (ipv4) {
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97 lua_pushstring(L, "0.0.0.0");
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98 lua_rawseti(L, -2, n++);
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99 }
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100 if (ipv6) {
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101 lua_pushstring(L, "::");
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102 lua_rawseti(L, -2, n++);
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103 }
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104 #endif
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105 return 1;
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106 }
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107
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108 int luaopen_util_net(lua_State* L)
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109 {
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110 luaL_Reg exports[] = {
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111 { "local_addresses", lc_local_addresses },
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112 { NULL, NULL }
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113 };
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parents:
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114
e9f5384f5ff1 util.net: Add util.net, containing local_addresses() (removed from LuaSocket 3.0)
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115 luaL_register(L, "net", exports);
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116 return 1;
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117 }