prosody
0598d822614f
util-src/net.c

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util-src/net.c @ 12894:0598d822614f 0.12 0.12.3

mod_websocket: Fire pre-session-close event (fixes #1800) This event was added in a7c183bb4e64 and is required to make mod_smacks know that a session was intentionally closed and shouldn't be hibernated (see fcea4d9e7502). Because this was missing from mod_websocket's session.close(), mod_smacks would always attempt to hibernate websocket sessions even if they closed cleanly. That mod_websocket has its own copy of session.close() is something to fix another day (probably not in the stable branch). So for now this commit makes the minimal change to get things working again. Thanks to Damian and the Jitsi team for reporting.
author Matthew Wild <mwild1@gmail.com>
date Mon, 20 Feb 2023 18:10:15 +0000
parent 10921:6eb5d2bb11af
child 12575:1f6f05a98fcd
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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 #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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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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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
7969
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206 lua_createtable(L, 0, 1);
6789
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diff changeset
207 luaL_setfuncs(L, exports, 0);
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208 return 1;
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209 }