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util-src/net.c @ 6411:6c8f6364bc48
util-src/*.c: Don't create globals when loaded
author | Kim Alvefur <zash@zash.se> |
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date | Tue, 16 Sep 2014 21:56:18 +0200 (2014-09-16) |
parent | 5810:99ad8d42d0c9 |
child | 6413:a552f4170aed |
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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114 |
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115 lua_newtable(L); |
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116 luaL_register(L, NULL, exports); |
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117 return 1; |
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118 } |