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util-src/net.c @ 12481:2ee27587fec7
net: refactor sslconfig to not depend on LuaSec
This now requires that the network backend exposes a tls_builder
function, which essentially wraps the former util.sslconfig.new()
function, passing a factory to create the eventual SSL context.
That allows a net.server backend to pick whatever it likes as SSL
context factory, as long as it understands the config table passed by
the SSL config builder. Heck, a backend could even mock and replace the
entire SSL config builder API.
| author | Jonas Schäfer <jonas@wielicki.name> |
|---|---|
| date | Sat, 02 Apr 2022 11:15:33 +0200 |
| parent | 10921:6eb5d2bb11af |
| child | 12575:1f6f05a98fcd |
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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 #ifndef _GNU_SOURCE |
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13 #define _GNU_SOURCE |
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14 #endif |
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15 |
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16 #include <stddef.h> |
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17 #include <string.h> |
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18 #include <errno.h> |
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19 |
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20 #ifndef _WIN32 |
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21 #include <sys/ioctl.h> |
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22 #include <sys/types.h> |
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23 #include <sys/socket.h> |
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24 #include <net/if.h> |
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25 #include <ifaddrs.h> |
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26 #include <arpa/inet.h> |
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27 #include <netinet/in.h> |
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28 #endif |
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29 |
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30 #include <lua.h> |
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31 #include <lauxlib.h> |
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32 |
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33 #if (LUA_VERSION_NUM == 501) |
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34 #define luaL_setfuncs(L, R, N) luaL_register(L, NULL, R) |
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35 #endif |
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36 #if (LUA_VERSION_NUM < 504) |
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37 #define luaL_pushfail lua_pushnil |
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38 #endif |
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39 |
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40 /* Enumerate all locally configured IP addresses */ |
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41 |
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42 static const char *const type_strings[] = { |
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43 "both", |
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44 "ipv4", |
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45 "ipv6", |
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46 NULL |
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47 }; |
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48 |
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49 static int lc_local_addresses(lua_State *L) { |
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50 #ifndef _WIN32 |
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51 /* Link-local IPv4 addresses; see RFC 3927 and RFC 5735 */ |
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52 const uint32_t ip4_linklocal = htonl(0xa9fe0000); /* 169.254.0.0 */ |
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53 const uint32_t ip4_mask = htonl(0xffff0000); |
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54 struct ifaddrs *addr = NULL, *a; |
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55 #endif |
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56 int n = 1; |
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57 int type = luaL_checkoption(L, 1, "both", type_strings); |
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58 const char link_local = lua_toboolean(L, 2); /* defaults to 0 (false) */ |
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59 const char ipv4 = (type == 0 || type == 1); |
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60 const char ipv6 = (type == 0 || type == 2); |
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61 |
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62 #ifndef _WIN32 |
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63 |
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64 if(getifaddrs(&addr) < 0) { |
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65 luaL_pushfail(L); |
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66 lua_pushfstring(L, "getifaddrs failed (%d): %s", errno, |
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67 strerror(errno)); |
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68 return 2; |
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69 } |
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70 |
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71 #endif |
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72 lua_newtable(L); |
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73 |
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74 #ifndef _WIN32 |
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75 |
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76 for(a = addr; a; a = a->ifa_next) { |
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77 int family; |
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78 char ipaddr[INET6_ADDRSTRLEN]; |
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79 const char *tmp = NULL; |
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80 |
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81 if(a->ifa_addr == NULL || a->ifa_flags & IFF_LOOPBACK) { |
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82 continue; |
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83 } |
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84 |
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85 family = a->ifa_addr->sa_family; |
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86 |
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87 if(ipv4 && family == AF_INET) { |
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88 struct sockaddr_in *sa = (struct sockaddr_in *)a->ifa_addr; |
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89 |
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90 if(!link_local && ((sa->sin_addr.s_addr & ip4_mask) == ip4_linklocal)) { |
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91 continue; |
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92 } |
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93 |
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94 tmp = inet_ntop(family, &sa->sin_addr, ipaddr, sizeof(ipaddr)); |
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95 } else if(ipv6 && family == AF_INET6) { |
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96 struct sockaddr_in6 *sa = (struct sockaddr_in6 *)a->ifa_addr; |
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97 |
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98 if(!link_local && IN6_IS_ADDR_LINKLOCAL(&sa->sin6_addr)) { |
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99 continue; |
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100 } |
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101 |
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102 if(IN6_IS_ADDR_V4MAPPED(&sa->sin6_addr) || IN6_IS_ADDR_V4COMPAT(&sa->sin6_addr)) { |
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103 continue; |
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104 } |
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105 |
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106 tmp = inet_ntop(family, &sa->sin6_addr, ipaddr, sizeof(ipaddr)); |
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107 } |
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108 |
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109 if(tmp != NULL) { |
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110 lua_pushstring(L, tmp); |
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111 lua_rawseti(L, -2, n++); |
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112 } |
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113 |
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114 /* TODO: Error reporting? */ |
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115 } |
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116 |
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117 freeifaddrs(addr); |
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118 #else |
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119 |
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120 if(ipv4) { |
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121 lua_pushstring(L, "0.0.0.0"); |
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122 lua_rawseti(L, -2, n++); |
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123 } |
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124 |
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125 if(ipv6) { |
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126 lua_pushstring(L, "::"); |
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127 lua_rawseti(L, -2, n++); |
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128 } |
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129 |
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130 #endif |
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131 return 1; |
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132 } |
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133 |
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134 static int lc_pton(lua_State *L) { |
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135 char buf[16]; |
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136 const char *ipaddr = luaL_checkstring(L, 1); |
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137 int errno_ = 0; |
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138 int family = strchr(ipaddr, ':') ? AF_INET6 : AF_INET; |
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139 |
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140 switch(inet_pton(family, ipaddr, &buf)) { |
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141 case 1: |
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142 lua_pushlstring(L, buf, family == AF_INET6 ? 16 : 4); |
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143 return 1; |
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144 |
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145 case -1: |
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146 errno_ = errno; |
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147 luaL_pushfail(L); |
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148 lua_pushstring(L, strerror(errno_)); |
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149 lua_pushinteger(L, errno_); |
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150 return 3; |
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151 |
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152 default: |
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153 case 0: |
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154 luaL_pushfail(L); |
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155 lua_pushstring(L, strerror(EINVAL)); |
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156 lua_pushinteger(L, EINVAL); |
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157 return 3; |
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158 } |
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159 |
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160 } |
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161 |
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162 static int lc_ntop(lua_State *L) { |
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163 char buf[INET6_ADDRSTRLEN]; |
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164 int family; |
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165 int errno_; |
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166 size_t l; |
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167 const char *ipaddr = luaL_checklstring(L, 1, &l); |
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168 |
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169 if(l == 16) { |
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170 family = AF_INET6; |
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171 } |
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172 else if(l == 4) { |
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173 family = AF_INET; |
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174 } |
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175 else { |
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176 luaL_pushfail(L); |
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177 lua_pushstring(L, strerror(EAFNOSUPPORT)); |
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178 lua_pushinteger(L, EAFNOSUPPORT); |
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179 return 3; |
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180 } |
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181 |
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182 if(!inet_ntop(family, ipaddr, buf, INET6_ADDRSTRLEN)) |
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183 { |
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184 errno_ = errno; |
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185 luaL_pushfail(L); |
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186 lua_pushstring(L, strerror(errno_)); |
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187 lua_pushinteger(L, errno_); |
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188 return 3; |
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189 } |
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190 |
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191 lua_pushstring(L, (const char *)(&buf)); |
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192 return 1; |
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193 } |
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194 |
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195 int luaopen_util_net(lua_State *L) { |
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196 #if (LUA_VERSION_NUM > 501) |
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197 luaL_checkversion(L); |
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198 #endif |
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199 luaL_Reg exports[] = { |
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200 { "local_addresses", lc_local_addresses }, |
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201 { "pton", lc_pton }, |
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202 { "ntop", lc_ntop }, |
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203 { NULL, NULL } |
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204 }; |
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205 |
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206 lua_createtable(L, 0, 1); |
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207 luaL_setfuncs(L, exports, 0); |
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208 return 1; |
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209 } |
