1 | /* |
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2 | * gaim |
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3 | * |
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4 | * Copyright (C) 1998-1999, Mark Spencer <markster@marko.net> |
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5 | * Copyright (C) 2002-2004, Wilmer van der Gaast, Jelmer Vernooij |
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6 | * |
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7 | * This program is free software; you can redistribute it and/or modify |
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8 | * it under the terms of the GNU General Public License as published by |
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9 | * the Free Software Foundation; either version 2 of the License, or |
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10 | * (at your option) any later version. |
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11 | * |
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12 | * This program is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | * GNU General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU General Public License |
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18 | * along with this program; if not, write to the Free Software |
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19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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20 | * |
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21 | */ |
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22 | |
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23 | #define BITLBEE_CORE |
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24 | #include <stdio.h> |
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25 | #include <stdlib.h> |
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26 | #include <string.h> |
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27 | #include <sys/types.h> |
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28 | #ifndef _WIN32 |
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29 | #include <sys/socket.h> |
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30 | #include <netdb.h> |
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31 | #include <netinet/in.h> |
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32 | #include <arpa/inet.h> |
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33 | #include <unistd.h> |
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34 | #else |
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35 | #include "sock.h" |
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36 | #define ETIMEDOUT WSAETIMEDOUT |
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37 | #define EINPROGRESS WSAEINPROGRESS |
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38 | #endif |
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39 | #include <fcntl.h> |
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40 | #include <errno.h> |
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41 | #include "nogaim.h" |
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42 | #include "proxy.h" |
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43 | #include "base64.h" |
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44 | |
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45 | char proxyhost[128] = ""; |
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46 | int proxyport = 0; |
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47 | int proxytype = PROXY_NONE; |
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48 | char proxyuser[128] = ""; |
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49 | char proxypass[128] = ""; |
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50 | |
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51 | struct PHB { |
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52 | b_event_handler func, proxy_func; |
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53 | gpointer data, proxy_data; |
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54 | char *host; |
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55 | int port; |
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56 | int fd; |
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57 | gint inpa; |
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58 | }; |
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59 | |
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60 | |
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61 | |
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62 | static struct sockaddr_in *gaim_gethostbyname(const char *host, int port) |
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63 | { |
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64 | static struct sockaddr_in sin; |
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65 | |
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66 | if (!inet_aton(host, &sin.sin_addr)) { |
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67 | struct hostent *hp; |
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68 | if (!(hp = gethostbyname(host))) { |
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69 | return NULL; |
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70 | } |
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71 | memset(&sin, 0, sizeof(struct sockaddr_in)); |
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72 | memcpy(&sin.sin_addr.s_addr, hp->h_addr, hp->h_length); |
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73 | sin.sin_family = hp->h_addrtype; |
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74 | } else |
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75 | sin.sin_family = AF_INET; |
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76 | sin.sin_port = htons(port); |
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77 | |
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78 | return &sin; |
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79 | } |
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80 | |
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81 | static gboolean gaim_io_connected(gpointer data, gint source, b_input_condition cond) |
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82 | { |
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83 | struct PHB *phb = data; |
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84 | unsigned int len; |
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85 | int error = ETIMEDOUT; |
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86 | len = sizeof(error); |
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87 | |
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88 | #ifndef _WIN32 |
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89 | if (getsockopt(source, SOL_SOCKET, SO_ERROR, &error, &len) < 0) { |
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90 | closesocket(source); |
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91 | b_event_remove(phb->inpa); |
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92 | if( phb->proxy_func ) |
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93 | phb->proxy_func(phb->proxy_data, -1, GAIM_INPUT_READ); |
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94 | else { |
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95 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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96 | g_free(phb); |
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97 | } |
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98 | return FALSE; |
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99 | } |
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100 | #endif |
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101 | sock_make_blocking(source); |
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102 | b_event_remove(phb->inpa); |
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103 | if( phb->proxy_func ) |
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104 | phb->proxy_func(phb->proxy_data, source, GAIM_INPUT_READ); |
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105 | else { |
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106 | phb->func(phb->data, source, GAIM_INPUT_READ); |
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107 | g_free(phb); |
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108 | } |
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109 | |
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110 | return FALSE; |
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111 | } |
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112 | |
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113 | static int proxy_connect_none(const char *host, unsigned short port, struct PHB *phb) |
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114 | { |
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115 | struct sockaddr_in *sin; |
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116 | int fd = -1; |
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117 | |
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118 | if (!(sin = gaim_gethostbyname(host, port))) { |
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119 | g_free(phb); |
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120 | return -1; |
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121 | } |
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122 | |
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123 | if ((fd = socket(sin->sin_family, SOCK_STREAM, 0)) < 0) { |
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124 | g_free(phb); |
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125 | return -1; |
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126 | } |
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127 | |
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128 | sock_make_nonblocking(fd); |
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129 | |
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130 | event_debug("proxy_connect_none( \"%s\", %d ) = %d\n", host, port, fd); |
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131 | |
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132 | if (connect(fd, (struct sockaddr *)sin, sizeof(*sin)) < 0) { |
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133 | if (sockerr_again()) { |
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134 | phb->inpa = b_input_add(fd, GAIM_INPUT_WRITE, gaim_io_connected, phb); |
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135 | phb->fd = fd; |
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136 | } else { |
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137 | closesocket(fd); |
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138 | g_free(phb); |
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139 | return -1; |
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140 | } |
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141 | } |
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142 | |
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143 | return fd; |
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144 | } |
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145 | |
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146 | |
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147 | /* Connecting to HTTP proxies */ |
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148 | |
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149 | #define HTTP_GOODSTRING "HTTP/1.0 200 Connection established" |
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150 | #define HTTP_GOODSTRING2 "HTTP/1.1 200 Connection established" |
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151 | |
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152 | static gboolean http_canread(gpointer data, gint source, b_input_condition cond) |
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153 | { |
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154 | int nlc = 0; |
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155 | int pos = 0; |
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156 | struct PHB *phb = data; |
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157 | char inputline[8192]; |
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158 | |
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159 | b_event_remove(phb->inpa); |
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160 | |
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161 | while ((pos < sizeof(inputline)-1) && (nlc != 2) && (read(source, &inputline[pos++], 1) == 1)) { |
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162 | if (inputline[pos - 1] == '\n') |
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163 | nlc++; |
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164 | else if (inputline[pos - 1] != '\r') |
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165 | nlc = 0; |
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166 | } |
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167 | inputline[pos] = '\0'; |
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168 | |
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169 | if ((memcmp(HTTP_GOODSTRING, inputline, strlen(HTTP_GOODSTRING)) == 0) || |
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170 | (memcmp(HTTP_GOODSTRING2, inputline, strlen(HTTP_GOODSTRING2)) == 0)) { |
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171 | phb->func(phb->data, source, GAIM_INPUT_READ); |
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172 | g_free(phb->host); |
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173 | g_free(phb); |
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174 | return FALSE; |
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175 | } |
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176 | |
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177 | close(source); |
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178 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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179 | g_free(phb->host); |
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180 | g_free(phb); |
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181 | |
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182 | return FALSE; |
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183 | } |
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184 | |
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185 | static gboolean http_canwrite(gpointer data, gint source, b_input_condition cond) |
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186 | { |
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187 | char cmd[384]; |
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188 | struct PHB *phb = data; |
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189 | unsigned int len; |
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190 | int error = ETIMEDOUT; |
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191 | if (phb->inpa > 0) |
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192 | b_event_remove(phb->inpa); |
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193 | len = sizeof(error); |
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194 | if (getsockopt(source, SOL_SOCKET, SO_ERROR, &error, &len) < 0) { |
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195 | close(source); |
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196 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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197 | g_free(phb->host); |
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198 | g_free(phb); |
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199 | return FALSE; |
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200 | } |
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201 | sock_make_blocking(source); |
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202 | |
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203 | g_snprintf(cmd, sizeof(cmd), "CONNECT %s:%d HTTP/1.1\r\nHost: %s:%d\r\n", phb->host, phb->port, |
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204 | phb->host, phb->port); |
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205 | if (send(source, cmd, strlen(cmd), 0) < 0) { |
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206 | close(source); |
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207 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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208 | g_free(phb->host); |
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209 | g_free(phb); |
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210 | return FALSE; |
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211 | } |
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212 | |
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213 | if (proxyuser && *proxyuser) { |
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214 | char *t1, *t2; |
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215 | t1 = g_strdup_printf("%s:%s", proxyuser, proxypass); |
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216 | t2 = tobase64(t1); |
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217 | g_free(t1); |
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218 | g_snprintf(cmd, sizeof(cmd), "Proxy-Authorization: Basic %s\r\n", t2); |
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219 | g_free(t2); |
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220 | if (send(source, cmd, strlen(cmd), 0) < 0) { |
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221 | close(source); |
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222 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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223 | g_free(phb->host); |
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224 | g_free(phb); |
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225 | return FALSE; |
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226 | } |
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227 | } |
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228 | |
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229 | g_snprintf(cmd, sizeof(cmd), "\r\n"); |
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230 | if (send(source, cmd, strlen(cmd), 0) < 0) { |
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231 | close(source); |
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232 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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233 | g_free(phb->host); |
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234 | g_free(phb); |
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235 | return FALSE; |
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236 | } |
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237 | |
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238 | phb->inpa = b_input_add(source, GAIM_INPUT_READ, http_canread, phb); |
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239 | |
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240 | return FALSE; |
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241 | } |
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242 | |
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243 | static int proxy_connect_http(const char *host, unsigned short port, struct PHB *phb) |
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244 | { |
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245 | phb->host = g_strdup(host); |
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246 | phb->port = port; |
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247 | phb->proxy_func = http_canwrite; |
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248 | phb->proxy_data = phb; |
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249 | |
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250 | return( proxy_connect_none( proxyhost, proxyport, phb ) ); |
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251 | } |
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252 | |
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253 | |
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254 | /* Connecting to SOCKS4 proxies */ |
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255 | |
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256 | static gboolean s4_canread(gpointer data, gint source, b_input_condition cond) |
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257 | { |
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258 | unsigned char packet[12]; |
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259 | struct PHB *phb = data; |
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260 | |
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261 | b_event_remove(phb->inpa); |
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262 | |
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263 | memset(packet, 0, sizeof(packet)); |
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264 | if (read(source, packet, 9) >= 4 && packet[1] == 90) { |
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265 | phb->func(phb->data, source, GAIM_INPUT_READ); |
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266 | g_free(phb->host); |
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267 | g_free(phb); |
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268 | return FALSE; |
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269 | } |
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270 | |
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271 | close(source); |
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272 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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273 | g_free(phb->host); |
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274 | g_free(phb); |
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275 | |
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276 | return FALSE; |
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277 | } |
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278 | |
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279 | static gboolean s4_canwrite(gpointer data, gint source, b_input_condition cond) |
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280 | { |
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281 | unsigned char packet[12]; |
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282 | struct hostent *hp; |
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283 | struct PHB *phb = data; |
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284 | unsigned int len; |
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285 | int error = ETIMEDOUT; |
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286 | if (phb->inpa > 0) |
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287 | b_event_remove(phb->inpa); |
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288 | len = sizeof(error); |
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289 | if (getsockopt(source, SOL_SOCKET, SO_ERROR, &error, &len) < 0) { |
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290 | close(source); |
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291 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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292 | g_free(phb->host); |
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293 | g_free(phb); |
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294 | return FALSE; |
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295 | } |
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296 | sock_make_blocking(source); |
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297 | |
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298 | /* XXX does socks4 not support host name lookups by the proxy? */ |
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299 | if (!(hp = gethostbyname(phb->host))) { |
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300 | close(source); |
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301 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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302 | g_free(phb->host); |
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303 | g_free(phb); |
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304 | return FALSE; |
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305 | } |
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306 | |
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307 | packet[0] = 4; |
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308 | packet[1] = 1; |
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309 | packet[2] = phb->port >> 8; |
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310 | packet[3] = phb->port & 0xff; |
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311 | packet[4] = (unsigned char)(hp->h_addr_list[0])[0]; |
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312 | packet[5] = (unsigned char)(hp->h_addr_list[0])[1]; |
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313 | packet[6] = (unsigned char)(hp->h_addr_list[0])[2]; |
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314 | packet[7] = (unsigned char)(hp->h_addr_list[0])[3]; |
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315 | packet[8] = 0; |
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316 | if (write(source, packet, 9) != 9) { |
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317 | close(source); |
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318 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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319 | g_free(phb->host); |
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320 | g_free(phb); |
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321 | return FALSE; |
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322 | } |
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323 | |
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324 | phb->inpa = b_input_add(source, GAIM_INPUT_READ, s4_canread, phb); |
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325 | |
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326 | return FALSE; |
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327 | } |
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328 | |
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329 | static int proxy_connect_socks4(const char *host, unsigned short port, struct PHB *phb) |
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330 | { |
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331 | phb->host = g_strdup(host); |
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332 | phb->port = port; |
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333 | phb->proxy_func = s4_canwrite; |
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334 | phb->proxy_data = phb; |
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335 | |
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336 | return( proxy_connect_none( proxyhost, proxyport, phb ) ); |
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337 | } |
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338 | |
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339 | |
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340 | /* Connecting to SOCKS5 proxies */ |
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341 | |
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342 | static gboolean s5_canread_again(gpointer data, gint source, b_input_condition cond) |
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343 | { |
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344 | unsigned char buf[512]; |
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345 | struct PHB *phb = data; |
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346 | |
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347 | b_event_remove(phb->inpa); |
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348 | |
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349 | if (read(source, buf, 10) < 10) { |
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350 | close(source); |
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351 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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352 | g_free(phb->host); |
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353 | g_free(phb); |
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354 | return FALSE; |
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355 | } |
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356 | if ((buf[0] != 0x05) || (buf[1] != 0x00)) { |
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357 | close(source); |
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358 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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359 | g_free(phb->host); |
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360 | g_free(phb); |
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361 | return FALSE; |
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362 | } |
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363 | |
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364 | phb->func(phb->data, source, GAIM_INPUT_READ); |
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365 | g_free(phb->host); |
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366 | g_free(phb); |
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367 | |
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368 | return FALSE; |
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369 | } |
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370 | |
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371 | static void s5_sendconnect(gpointer data, gint source) |
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372 | { |
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373 | unsigned char buf[512]; |
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374 | struct PHB *phb = data; |
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375 | int hlen = strlen(phb->host); |
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376 | |
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377 | buf[0] = 0x05; |
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378 | buf[1] = 0x01; /* CONNECT */ |
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379 | buf[2] = 0x00; /* reserved */ |
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380 | buf[3] = 0x03; /* address type -- host name */ |
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381 | buf[4] = hlen; |
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382 | memcpy(buf + 5, phb->host, hlen); |
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383 | buf[5 + strlen(phb->host)] = phb->port >> 8; |
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384 | buf[5 + strlen(phb->host) + 1] = phb->port & 0xff; |
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385 | |
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386 | if (write(source, buf, (5 + strlen(phb->host) + 2)) < (5 + strlen(phb->host) + 2)) { |
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387 | close(source); |
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388 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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389 | g_free(phb->host); |
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390 | g_free(phb); |
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391 | return; |
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392 | } |
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393 | |
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394 | phb->inpa = b_input_add(source, GAIM_INPUT_READ, s5_canread_again, phb); |
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395 | } |
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396 | |
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397 | static gboolean s5_readauth(gpointer data, gint source, b_input_condition cond) |
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398 | { |
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399 | unsigned char buf[512]; |
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400 | struct PHB *phb = data; |
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401 | |
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402 | b_event_remove(phb->inpa); |
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403 | |
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404 | if (read(source, buf, 2) < 2) { |
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405 | close(source); |
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406 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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407 | g_free(phb->host); |
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408 | g_free(phb); |
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409 | return FALSE; |
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410 | } |
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411 | |
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412 | if ((buf[0] != 0x01) || (buf[1] != 0x00)) { |
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413 | close(source); |
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414 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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415 | g_free(phb->host); |
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416 | g_free(phb); |
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417 | return FALSE; |
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418 | } |
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419 | |
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420 | s5_sendconnect(phb, source); |
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421 | |
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422 | return FALSE; |
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423 | } |
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424 | |
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425 | static gboolean s5_canread(gpointer data, gint source, b_input_condition cond) |
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426 | { |
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427 | unsigned char buf[512]; |
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428 | struct PHB *phb = data; |
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429 | |
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430 | b_event_remove(phb->inpa); |
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431 | |
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432 | if (read(source, buf, 2) < 2) { |
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433 | close(source); |
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434 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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435 | g_free(phb->host); |
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436 | g_free(phb); |
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437 | return FALSE; |
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438 | } |
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439 | |
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440 | if ((buf[0] != 0x05) || (buf[1] == 0xff)) { |
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441 | close(source); |
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442 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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443 | g_free(phb->host); |
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444 | g_free(phb); |
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445 | return FALSE; |
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446 | } |
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447 | |
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448 | if (buf[1] == 0x02) { |
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449 | unsigned int i = strlen(proxyuser), j = strlen(proxypass); |
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450 | buf[0] = 0x01; /* version 1 */ |
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451 | buf[1] = i; |
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452 | memcpy(buf + 2, proxyuser, i); |
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453 | buf[2 + i] = j; |
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454 | memcpy(buf + 2 + i + 1, proxypass, j); |
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455 | if (write(source, buf, 3 + i + j) < 3 + i + j) { |
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456 | close(source); |
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457 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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458 | g_free(phb->host); |
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459 | g_free(phb); |
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460 | return FALSE; |
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461 | } |
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462 | |
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463 | phb->inpa = b_input_add(source, GAIM_INPUT_READ, s5_readauth, phb); |
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464 | } else { |
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465 | s5_sendconnect(phb, source); |
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466 | } |
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467 | |
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468 | return FALSE; |
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469 | } |
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470 | |
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471 | static gboolean s5_canwrite(gpointer data, gint source, b_input_condition cond) |
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472 | { |
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473 | unsigned char buf[512]; |
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474 | int i; |
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475 | struct PHB *phb = data; |
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476 | unsigned int len; |
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477 | int error = ETIMEDOUT; |
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478 | if (phb->inpa > 0) |
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479 | b_event_remove(phb->inpa); |
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480 | len = sizeof(error); |
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481 | if (getsockopt(source, SOL_SOCKET, SO_ERROR, &error, &len) < 0) { |
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482 | close(source); |
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483 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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484 | g_free(phb->host); |
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485 | g_free(phb); |
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486 | return FALSE; |
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487 | } |
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488 | sock_make_blocking(source); |
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489 | |
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490 | i = 0; |
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491 | buf[0] = 0x05; /* SOCKS version 5 */ |
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492 | if (proxyuser[0]) { |
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493 | buf[1] = 0x02; /* two methods */ |
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494 | buf[2] = 0x00; /* no authentication */ |
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495 | buf[3] = 0x02; /* username/password authentication */ |
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496 | i = 4; |
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497 | } else { |
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498 | buf[1] = 0x01; |
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499 | buf[2] = 0x00; |
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500 | i = 3; |
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501 | } |
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502 | |
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503 | if (write(source, buf, i) < i) { |
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504 | close(source); |
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505 | phb->func(phb->data, -1, GAIM_INPUT_READ); |
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506 | g_free(phb->host); |
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507 | g_free(phb); |
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508 | return FALSE; |
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509 | } |
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510 | |
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511 | phb->inpa = b_input_add(source, GAIM_INPUT_READ, s5_canread, phb); |
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512 | |
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513 | return FALSE; |
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514 | } |
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515 | |
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516 | static int proxy_connect_socks5(const char *host, unsigned short port, struct PHB *phb) |
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517 | { |
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518 | phb->host = g_strdup(host); |
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519 | phb->port = port; |
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520 | phb->proxy_func = s5_canwrite; |
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521 | phb->proxy_data = phb; |
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522 | |
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523 | return( proxy_connect_none( proxyhost, proxyport, phb ) ); |
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524 | } |
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525 | |
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526 | |
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527 | /* Export functions */ |
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528 | |
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529 | int proxy_connect(const char *host, int port, b_event_handler func, gpointer data) |
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530 | { |
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531 | struct PHB *phb; |
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532 | |
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533 | if (!host || !port || (port == -1) || !func || strlen(host) > 128) { |
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534 | return -1; |
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535 | } |
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536 | |
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537 | phb = g_new0(struct PHB, 1); |
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538 | phb->func = func; |
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539 | phb->data = data; |
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540 | |
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541 | if ((proxytype == PROXY_NONE) || !proxyhost || !proxyhost[0] || !proxyport || (proxyport == -1)) |
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542 | return proxy_connect_none(host, port, phb); |
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543 | else if (proxytype == PROXY_HTTP) |
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544 | return proxy_connect_http(host, port, phb); |
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545 | else if (proxytype == PROXY_SOCKS4) |
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546 | return proxy_connect_socks4(host, port, phb); |
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547 | else if (proxytype == PROXY_SOCKS5) |
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548 | return proxy_connect_socks5(host, port, phb); |
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549 | |
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550 | if (phb->host) g_free(phb); |
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551 | g_free(phb); |
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552 | return -1; |
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553 | } |
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