1 | //socket.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008 |
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5 | * |
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6 | * This file is part of libroar a part of RoarAudio, |
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7 | * a cross-platform sound system for both, home and professional use. |
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8 | * See README for details. |
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9 | * |
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10 | * This file is free software; you can redistribute it and/or modify |
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11 | * it under the terms of the GNU General Public License version 3 |
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12 | * as published by the Free Software Foundation. |
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13 | * |
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14 | * libroar is distributed in the hope that it will be useful, |
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | * GNU General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with this software; see the file COPYING. If not, write to |
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21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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22 | * |
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23 | * NOTE for everyone want's to change something and send patches: |
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24 | * read README and HACKING! There a addition information on |
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25 | * the license of this document you need to read before you send |
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26 | * any patches. |
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27 | * |
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28 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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29 | * or libpulse*: |
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30 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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31 | * and are therefore GPL. Because of this it may be illigal to use |
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32 | * them with any software that uses libesd, libartsc or libpulse*. |
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33 | */ |
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34 | |
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35 | #include "libroar.h" |
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36 | |
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37 | #define MODE_LISTEN ROAR_SOCKET_MODE_LISTEN |
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38 | #define MODE_CONNECT ROAR_SOCKET_MODE_CONNECT |
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39 | |
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40 | int roar_socket_new_tcp (void) { |
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41 | int fh; |
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42 | #ifndef ROAR_TARGET_WIN32 |
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43 | int opt = IPTOS_LOWDELAY; |
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44 | #endif |
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45 | |
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46 | fh = socket(PF_INET, SOCK_STREAM, 0); |
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47 | |
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48 | #ifndef ROAR_TARGET_WIN32 |
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49 | setsockopt(fh, IPPROTO_IP, IP_TOS, &opt, sizeof(int)); |
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50 | #endif |
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51 | |
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52 | return fh; |
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53 | } |
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54 | |
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55 | int roar_socket_new_udp (void) { |
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56 | int fh; |
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57 | #ifndef ROAR_TARGET_WIN32 |
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58 | int opt = IPTOS_LOWDELAY; |
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59 | #endif |
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60 | |
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61 | fh = socket(PF_INET, SOCK_DGRAM, 0); |
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62 | |
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63 | #ifndef ROAR_TARGET_WIN32 |
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64 | setsockopt(fh, IPPROTO_IP, IP_TOS, &opt, sizeof(int)); |
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65 | #endif |
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66 | |
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67 | return fh; |
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68 | } |
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69 | |
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70 | int roar_socket_new_tcp6 (void) { |
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71 | #ifdef ROAR_HAVE_IPV6 |
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72 | int fh; |
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73 | int opt = IPTOS_LOWDELAY; |
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74 | |
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75 | fh = socket(PF_INET6, SOCK_STREAM, 0); |
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76 | |
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77 | setsockopt(fh, IPPROTO_IP, IP_TOS, &opt, sizeof(int)); |
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78 | |
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79 | return fh; |
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80 | #else |
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81 | return -1; |
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82 | #endif |
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83 | } |
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84 | |
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85 | int roar_socket_new_udp6 (void) { |
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86 | #ifdef ROAR_HAVE_IPV6 |
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87 | int fh; |
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88 | int opt = IPTOS_LOWDELAY; |
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89 | |
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90 | fh = socket(PF_INET6, SOCK_DGRAM, 0); |
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91 | |
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92 | setsockopt(fh, IPPROTO_IP, IP_TOS, &opt, sizeof(int)); |
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93 | |
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94 | return fh; |
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95 | #else |
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96 | return -1; |
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97 | #endif |
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98 | } |
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99 | |
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100 | int roar_socket_new_unix (void) { |
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101 | int fh; |
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102 | /* |
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103 | #ifdef SO_PEERCRED |
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104 | int opt = 1; |
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105 | #endif |
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106 | */ |
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107 | |
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108 | fh = socket(AF_UNIX, SOCK_STREAM, 0); |
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109 | |
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110 | /* |
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111 | #ifdef SO_PEERCRED |
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112 | // setsockopt(fh, SOL_SOCKET, SO_PASSCRED, &opt, sizeof(int)); |
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113 | #endif |
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114 | */ |
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115 | |
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116 | return fh; |
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117 | } |
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118 | |
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119 | int roar_socket_decnet_set_timeout (int fh, time_t sec, int usec) { |
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120 | #ifdef ROAR_HAVE_LIBDNET |
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121 | struct timeval timeout = {sec, usec}; |
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122 | |
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123 | return setsockopt(fh, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(timeout)); |
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124 | #else |
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125 | return -1; |
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126 | #endif |
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127 | } |
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128 | |
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129 | int roar_socket_recvbuf(int fh, int len) { |
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130 | if ( len < 256 ) len = 256; |
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131 | |
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132 | return setsockopt(fh, SOL_SOCKET, SO_RCVBUF, &len, sizeof(len)); |
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133 | } |
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134 | |
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135 | int roar_socket_new_decnet_seqpacket (void) { |
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136 | #ifdef ROAR_HAVE_LIBDNET |
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137 | int fh; |
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138 | |
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139 | fh = socket(AF_DECnet, SOCK_SEQPACKET, DNPROTO_NSP); |
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140 | |
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141 | roar_socket_decnet_set_timeout(fh, 300, 0); |
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142 | |
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143 | return fh; |
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144 | #else |
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145 | return -1; |
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146 | #endif |
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147 | } |
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148 | |
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149 | |
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150 | int roar_socket_new_decnet_stream (void) { |
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151 | #ifdef ROAR_HAVE_LIBDNET |
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152 | int fh; |
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153 | |
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154 | fh = socket(AF_DECnet, SOCK_STREAM, DNPROTO_NSP); |
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155 | |
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156 | roar_socket_decnet_set_timeout(fh, 300, 0); |
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157 | |
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158 | return fh; |
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159 | #else |
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160 | return -1; |
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161 | #endif |
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162 | } |
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163 | |
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164 | int roar_socket_new_ipxspx (void) { |
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165 | return -1; |
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166 | } |
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167 | |
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168 | int roar_socket_new_ipx (void) { |
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169 | #ifdef ROAR_HAVE_IPX |
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170 | return socket(AF_IPX, SOCK_DGRAM, AF_IPX); |
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171 | #else |
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172 | return -1; |
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173 | #endif |
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174 | } |
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175 | |
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176 | |
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177 | int roar_socket_nonblock(int fh, int state) { |
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178 | #ifndef ROAR_TARGET_WIN32 |
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179 | int flags; |
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180 | |
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181 | if ( (flags = fcntl(fh, F_GETFL, 0)) == -1 ) { |
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182 | ROAR_ERR("roar_socket_nonblock(fh=%i, state=%i): Can not read flags: %s", fh, state, strerror(errno)); |
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183 | ROAR_DBG("roar_socket_nonblock(fh=%i, state=%i) = -1", fh, state); |
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184 | return -1; |
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185 | } |
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186 | |
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187 | flags |= O_NONBLOCK; |
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188 | |
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189 | if ( state == ROAR_SOCKET_BLOCK ) |
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190 | flags -= O_NONBLOCK; |
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191 | |
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192 | if ( fcntl(fh, F_SETFL, flags) == -1 ) { |
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193 | ROAR_ERR("roar_socket_nonblock(fh=%i, state=%i): Can not set flags: %s", fh, state, strerror(errno)); |
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194 | ROAR_DBG("roar_socket_nonblock(fh=%i, state=%i) = -1", fh, state); |
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195 | return -1; |
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196 | } |
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197 | |
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198 | ROAR_DBG("roar_socket_nonblock(fh=%i, state=%i) = 0", fh, state); |
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199 | return 0; |
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200 | #else |
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201 | ROAR_WARN("roar_socket_nonblock(*): no nonblocking IO support on win32, use a real OS"); |
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202 | return -1; |
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203 | #endif |
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204 | } |
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205 | |
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206 | int roar_socket_dup_udp_local_end (int fh) { |
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207 | #ifndef ROAR_TARGET_WIN32 |
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208 | int n = -1; |
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209 | int flags = -1; |
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210 | struct sockaddr_in socket_addr; |
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211 | socklen_t len = sizeof(struct sockaddr_in); |
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212 | |
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213 | if ( (flags = fcntl(fh, F_GETFL, 0)) == -1 ) { |
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214 | ROAR_WARN("roar_socket_dup_udp_local_end(fh=%i): Can not read flags: %s", fh, strerror(errno)); |
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215 | } |
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216 | |
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217 | if ( getsockname(fh, (struct sockaddr *)&socket_addr, &len) == -1 ) { |
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218 | return -1; |
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219 | } |
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220 | |
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221 | if ( socket_addr.sin_family != AF_INET ) { |
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222 | return -1; |
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223 | } |
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224 | |
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225 | n = roar_socket_new_udp(); |
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226 | |
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227 | if ( n == -1 ) |
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228 | return -1; |
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229 | |
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230 | // if ( mode_func(fh, (struct sockaddr *)&socket_addr, sizeof(struct sockaddr_in)) == -1 ) { |
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231 | if ( bind(n, (struct sockaddr *)&socket_addr, len) == -1 ) { |
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232 | close(n); |
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233 | return -1; |
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234 | } |
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235 | |
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236 | if ( flags != -1 ) { |
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237 | if ( fcntl(fh, F_SETFL, flags) == -1 ) { |
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238 | ROAR_WARN("roar_socket_dup_udp_local_end(fh=%i): Can not set flags: %s", fh, strerror(errno)); |
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239 | return -1; |
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240 | } |
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241 | } |
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242 | |
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243 | |
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244 | return n; |
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245 | #else |
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246 | ROAR_WARN("roar_socket_dup_udp_local_end(*): this function is not supported on win32, use a real OS"); |
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247 | return -1; |
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248 | #endif |
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249 | } |
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250 | |
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251 | |
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252 | #define _SCMR_CONTROLLEN (sizeof(struct cmsghdr) + sizeof(int)) |
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253 | int roar_socket_send_fh (int sock, int fh, char * mes, size_t len) { |
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254 | #ifndef ROAR_TARGET_WIN32 |
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255 | struct iovec iov[1]; |
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256 | struct msghdr msg; |
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257 | char cmptr_buf[_SCMR_CONTROLLEN]; |
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258 | struct cmsghdr * cmptr = (struct cmsghdr *) cmptr_buf; |
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259 | char localmes[1] = {0}; |
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260 | |
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261 | ROAR_DBG("roar_socket_send_fh(sock=%i, fh=%i, mes=%p, len=%u) = ?", sock, fh, mes, len); |
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262 | |
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263 | if ( sock < 0 || fh < 0 ) |
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264 | return -1; |
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265 | |
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266 | if ( len == 0 ) { |
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267 | len = 1; |
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268 | mes = localmes; |
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269 | } |
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270 | |
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271 | memset(cmptr, 0, _SCMR_CONTROLLEN); |
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272 | |
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273 | iov[0].iov_base = mes; |
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274 | iov[0].iov_len = len; |
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275 | msg.msg_iov = iov; |
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276 | msg.msg_iovlen = 1; |
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277 | msg.msg_name = NULL; |
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278 | msg.msg_namelen = 0; |
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279 | |
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280 | cmptr->cmsg_level = SOL_SOCKET; |
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281 | cmptr->cmsg_type = SCM_RIGHTS; |
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282 | cmptr->cmsg_len = _SCMR_CONTROLLEN; |
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283 | msg.msg_control = (caddr_t) cmptr; |
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284 | msg.msg_controllen = _SCMR_CONTROLLEN; |
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285 | *(int *)CMSG_DATA(cmptr) = fh; |
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286 | |
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287 | return sendmsg(sock, &msg, 0); |
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288 | #else |
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289 | ROAR_ERR("roar_socket_send_fh(*): There is no UNIX Domain Socket support in win32, download a real OS."); |
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290 | return -1; |
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291 | #endif |
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292 | } |
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293 | |
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294 | int roar_socket_recv_fh (int sock, char * mes, size_t * len) { |
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295 | #ifndef ROAR_TARGET_WIN32 |
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296 | struct iovec iov[1]; |
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297 | struct msghdr msg; |
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298 | char cmptr_buf[_SCMR_CONTROLLEN]; |
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299 | struct cmsghdr * cmptr = (struct cmsghdr *) cmptr_buf; |
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300 | char localmes[1]; |
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301 | size_t locallen[1] = {1}; |
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302 | |
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303 | if ( sock < 0 ) |
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304 | return -1; |
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305 | |
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306 | if ( len == NULL ) { |
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307 | len = locallen; |
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308 | mes = localmes; |
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309 | } |
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310 | |
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311 | iov[0].iov_base = mes; |
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312 | iov[0].iov_len = *len; |
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313 | msg.msg_iov = iov; |
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314 | msg.msg_iovlen = 1; |
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315 | msg.msg_name = NULL; |
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316 | msg.msg_namelen = 0; |
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317 | |
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318 | msg.msg_control = (caddr_t) cmptr; |
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319 | msg.msg_controllen = _SCMR_CONTROLLEN; |
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320 | |
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321 | if ( (*len = recvmsg(sock, &msg, 0)) == -1 ) |
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322 | return -1; |
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323 | |
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324 | if ( msg.msg_controllen != _SCMR_CONTROLLEN ) |
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325 | return -1; |
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326 | |
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327 | return *(int *)CMSG_DATA(cmptr); |
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328 | #else |
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329 | ROAR_ERR("roar_socket_recv_fh(*): There is no UNIX Domain Socket support in win32, download a real OS."); |
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330 | return -1; |
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331 | #endif |
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332 | } |
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333 | |
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334 | int roar_socket_listen (int type, char * host, int port) { |
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335 | return roar_socket_open(MODE_LISTEN, type, host, port); |
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336 | } |
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337 | |
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338 | int roar_socket_connect (char * host, int port) { |
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339 | char * proxy_type = getenv("ROAR_PROXY"); |
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340 | |
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341 | if ( proxy_type == NULL || strcmp(proxy_type, "") == 0 ) { |
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342 | return roar_socket_open(MODE_CONNECT, ROAR_SOCKET_TYPE_UNKNOWN, host, port); |
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343 | } else { |
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344 | #ifdef ROAR_SUPPORT_PROXY |
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345 | return roar_socket_open_proxy(MODE_CONNECT, ROAR_SOCKET_TYPE_UNKNOWN, host, port, proxy_type); |
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346 | #else |
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347 | ROAR_ERR("roar_socket_connect(host='%s', port=%i): no support for proxy code (proxy_type=%s)", host, port, proxy_type); |
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348 | return -1; |
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349 | #endif |
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350 | } |
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351 | } |
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352 | |
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353 | |
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354 | int roar_socket_listen_decnet (char * object, int num) { |
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355 | #ifdef ROAR_HAVE_LIBDNET |
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356 | int fh = roar_socket_new_decnet_stream(); |
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357 | struct sockaddr_dn bind_sockaddr; |
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358 | |
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359 | if ( fh == -1 ) |
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360 | return -1; |
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361 | |
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362 | if ( !*object ) |
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363 | object = NULL; |
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364 | |
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365 | if ( (object && num) || (!*object && !num) ) { |
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366 | ROAR_WARN("roar_socket_listen_decnet(object='%s', num=%i): illegal address!", object, num); |
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367 | close(fh); |
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368 | return -1; |
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369 | } |
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370 | |
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371 | memset((void*)&bind_sockaddr, 0, sizeof(struct sockaddr_dn)); |
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372 | |
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373 | bind_sockaddr.sdn_family = AF_DECnet; |
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374 | bind_sockaddr.sdn_flags = 0; |
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375 | bind_sockaddr.sdn_objnum = num; |
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376 | |
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377 | if ( num ) { |
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378 | bind_sockaddr.sdn_objnamel = 0; |
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379 | } else { |
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380 | bind_sockaddr.sdn_objnamel = ROAR_dn_htons(strlen(object)); |
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381 | if ( bind_sockaddr.sdn_objnamel > DN_MAXOBJL ) |
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382 | bind_sockaddr.sdn_objnamel = DN_MAXOBJL; |
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383 | strncpy((char*)bind_sockaddr.sdn_objname, object, DN_MAXOBJL); |
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384 | } |
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385 | |
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386 | if ( bind(fh, (struct sockaddr *) &bind_sockaddr, sizeof(bind_sockaddr)) == -1 ) { |
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387 | close(fh); |
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388 | return -1; |
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389 | } |
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390 | |
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391 | if ( listen(fh, 8) == -1 ) { |
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392 | close(fh); |
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393 | return -1; |
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394 | } |
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395 | |
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396 | return fh; |
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397 | #else |
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398 | return -1; |
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399 | #endif |
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400 | } |
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401 | |
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402 | char * roar_socket_get_local_nodename(void) { |
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403 | #ifdef ROAR_HAVE_LIBDNET |
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404 | static char node[16] = {0}; |
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405 | struct dn_naddr *binaddr; |
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406 | struct nodeent *dp; |
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407 | |
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408 | if ( !node[0] ) { |
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409 | if ( (binaddr=getnodeadd()) == NULL) |
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410 | return NULL; |
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411 | |
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412 | if ( (dp=getnodebyaddr((char*)binaddr->a_addr, binaddr->a_len, PF_DECnet)) == NULL ) |
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413 | return NULL; |
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414 | |
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415 | strncpy(node, dp->n_name, 15); |
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416 | node[15] = 0; |
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417 | } |
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418 | |
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419 | return node; |
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420 | #else |
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421 | return NULL; |
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422 | #endif |
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423 | } |
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424 | |
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425 | int roar_socket_open (int mode, int type, char * host, int port) { |
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426 | // int type = ROAR_SOCKET_TYPE_INET; |
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427 | int fh; |
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428 | #ifdef ROAR_HAVE_IPX |
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429 | #define _NEED_OBJ |
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430 | int i; |
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431 | int ret; |
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432 | #endif |
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433 | union { |
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434 | struct sockaddr_in in; |
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435 | #ifdef ROAR_HAVE_UNIX |
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436 | struct sockaddr_un un; |
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437 | #endif |
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438 | #ifdef ROAR_HAVE_IPV6 |
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439 | struct sockaddr_in6 in6; |
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440 | #endif |
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441 | #ifdef ROAR_HAVE_IPX |
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442 | struct sockaddr_ipx ipx; |
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443 | #endif |
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444 | } socket_addr; |
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445 | struct hostent * he; |
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446 | //unsigned int host_div = 0; |
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447 | int (*mode_func)(int sockfd, const struct sockaddr *serv_addr, socklen_t addrlen) = connect; // default is to connect |
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448 | #ifdef ROAR_HAVE_LIBDNET |
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449 | #define _NEED_OBJ |
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450 | #endif |
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451 | #ifdef _NEED_OBJ |
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452 | char obj[80]; |
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453 | char * del; |
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454 | #endif |
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455 | |
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456 | if ( mode == MODE_LISTEN ) |
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457 | mode_func = bind; |
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458 | |
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459 | if ( type == ROAR_SOCKET_TYPE_UNKNOWN ) { |
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460 | type = ROAR_SOCKET_TYPE_INET; |
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461 | if ( *host == '/' ) { |
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462 | type = ROAR_SOCKET_TYPE_UNIX; |
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463 | } else if ( strcmp(host, "+fork") == 0 ) { |
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464 | type = ROAR_SOCKET_TYPE_FORK; |
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465 | } else if ( strstr(host, "::") != NULL ) { |
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466 | type = ROAR_SOCKET_TYPE_DECNET; |
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467 | } else if ( host[strlen(host)-1] == ')' ) { |
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468 | type = ROAR_SOCKET_TYPE_IPX; |
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469 | } |
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470 | } |
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471 | |
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472 | |
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473 | ROAR_DBG("roar_socket_open(*): type=%s, host='%s', port=%i", |
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474 | type == ROAR_SOCKET_TYPE_UNIX ? "UNIX" : "INET", host, port); |
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475 | |
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476 | if ( type == ROAR_SOCKET_TYPE_DECNET ) { |
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477 | #ifdef ROAR_HAVE_LIBDNET |
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478 | ROAR_DBG("roar_socket_open(*): hostname for DECnet: host(%p)=%s", host, host); |
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479 | del = strstr(host, "::"); |
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480 | ROAR_DBG("roar_socket_open(*): hostname for DECnet: del(%p)=%s", del, del); |
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481 | |
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482 | if ( del == NULL ) { |
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483 | ROAR_WARN("roar_socket_open(*): invalid hostname for DECnet: %s", host); |
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484 | return -1; |
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485 | } |
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486 | |
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487 | *del = 0; |
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488 | |
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489 | if ( *(del+2) == '#' ) { // assume we have node::#num |
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490 | port = atoi(del+2); |
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491 | } |
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492 | |
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493 | if ( port ) { |
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494 | snprintf(obj, 7, "%i", port); // no need for snprintf() as dec(port) is smaller than obj[] |
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495 | } else { |
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496 | *obj = 0; |
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497 | strncat(obj, del+2, 79); |
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498 | } |
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499 | |
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500 | if ( mode == MODE_LISTEN ) { |
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501 | fh = roar_socket_listen_decnet(obj, port); |
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502 | *del = ':'; |
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503 | return fh; |
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504 | // return -1; // listen sockets on DECnet are not supportet at the moment |
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505 | } else { |
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506 | // There is nothing wrong in this case to use dnet_conn() so we do. |
---|
507 | fh = dnet_conn(host, obj, SOCK_STREAM, 0 ,0 ,0 , 0); |
---|
508 | *del = ':'; |
---|
509 | return fh; |
---|
510 | } |
---|
511 | #else |
---|
512 | return -1; // no decnet support |
---|
513 | #endif |
---|
514 | } |
---|
515 | |
---|
516 | memset(&socket_addr, 0, sizeof(socket_addr)); |
---|
517 | memset(&he, 0, sizeof(he)); // FIXME: we have a valid pointer in here???? |
---|
518 | |
---|
519 | |
---|
520 | if ( type == ROAR_SOCKET_TYPE_INET || type == ROAR_SOCKET_TYPE_INET6 ) { |
---|
521 | |
---|
522 | if ( (he = gethostbyname(host)) == NULL ) { |
---|
523 | ROAR_ERR("roar_socket_open(*): Can\'t resolve host name '%s'", |
---|
524 | host); |
---|
525 | return -1; |
---|
526 | } |
---|
527 | |
---|
528 | memcpy((struct in_addr *)&socket_addr.in.sin_addr, he->h_addr, sizeof(struct in_addr)); |
---|
529 | |
---|
530 | /* set the connect information */ |
---|
531 | socket_addr.in.sin_family = AF_INET; |
---|
532 | socket_addr.in.sin_port = ROAR_HOST2NET16(port); |
---|
533 | |
---|
534 | fh = roar_socket_new_tcp(); |
---|
535 | |
---|
536 | if ( mode_func(fh, (struct sockaddr *)&socket_addr.in, sizeof(struct sockaddr_in)) == -1 ) { |
---|
537 | ROAR_DBG("roar_socket_open(*): Can not connect/bind: %s", strerror(errno)); |
---|
538 | close(fh); |
---|
539 | return -1; |
---|
540 | } |
---|
541 | // hey! we have a socket... |
---|
542 | } else if ( type == ROAR_SOCKET_TYPE_UNIX ) { |
---|
543 | #ifdef ROAR_HAVE_UNIX |
---|
544 | socket_addr.un.sun_family = AF_UNIX; |
---|
545 | strncpy(socket_addr.un.sun_path, host, sizeof(socket_addr.un.sun_path) - 1); |
---|
546 | |
---|
547 | fh = roar_socket_new_unix(); |
---|
548 | |
---|
549 | if ( mode_func(fh, (struct sockaddr *)&socket_addr.un, sizeof(struct sockaddr_un)) == -1 ) { |
---|
550 | ROAR_DBG("roar_socket_open(*): Can not connect/bind: %s", strerror(errno)); |
---|
551 | close(fh); |
---|
552 | return -1; |
---|
553 | } |
---|
554 | #else |
---|
555 | ROAR_ERR("roar_socket_open(*): There is no UNIX Domain Socket support in win32, download a real OS."); |
---|
556 | return -1; |
---|
557 | #endif |
---|
558 | } else if ( type == ROAR_SOCKET_TYPE_IPX ) { |
---|
559 | #ifdef ROAR_HAVE_IPX |
---|
560 | socket_addr.ipx.sipx_family = AF_IPX; |
---|
561 | |
---|
562 | obj[0] = 0; |
---|
563 | |
---|
564 | if ( (ret = sscanf(host, "%8x.%12s(%x)", &socket_addr.ipx.sipx_network, obj, |
---|
565 | (unsigned int *)&socket_addr.ipx.sipx_port)) < 2 ) { |
---|
566 | return -1; |
---|
567 | } else if ( ret == 2 ) { |
---|
568 | socket_addr.ipx.sipx_port = port; // Network Byte Order? |
---|
569 | } |
---|
570 | |
---|
571 | memset(socket_addr.ipx.sipx_node, 0, IPX_NODE_LEN); |
---|
572 | ret = strlen(obj); |
---|
573 | |
---|
574 | if ( ret % 2 ) // needs to be even at the moment |
---|
575 | return -1; |
---|
576 | |
---|
577 | fh = roar_socket_new_ipx(); |
---|
578 | |
---|
579 | close(fh); |
---|
580 | return -1; |
---|
581 | #else |
---|
582 | return -1; |
---|
583 | #endif |
---|
584 | } else if ( type == ROAR_SOCKET_TYPE_FORK ) { |
---|
585 | return roar_socket_open_fork(mode, host, port); |
---|
586 | } else if ( type == ROAR_SOCKET_TYPE_FILE ) { |
---|
587 | return roar_socket_open_file(mode, host, port); |
---|
588 | } else { |
---|
589 | return -1; |
---|
590 | } |
---|
591 | |
---|
592 | if ( mode == MODE_LISTEN ) |
---|
593 | if ( listen(fh, ROAR_SOCKET_QUEUE_LEN) == -1 ) { |
---|
594 | close(fh); |
---|
595 | return -1; |
---|
596 | } |
---|
597 | |
---|
598 | return fh; |
---|
599 | } |
---|
600 | |
---|
601 | int roar_socket_open_fork (int mode, char * host, int port) { |
---|
602 | #ifndef ROAR_TARGET_WIN32 |
---|
603 | int socks[2]; |
---|
604 | int r; |
---|
605 | char fhstr[8]; |
---|
606 | |
---|
607 | if ( mode == MODE_LISTEN ) |
---|
608 | return -1; |
---|
609 | |
---|
610 | if ( socketpair(AF_UNIX, SOCK_STREAM, 0, socks) == -1 ) { |
---|
611 | return -1; |
---|
612 | } |
---|
613 | |
---|
614 | r = fork(); |
---|
615 | |
---|
616 | if ( r == -1 ) { // error! |
---|
617 | ROAR_ERR("roar_socket_open_fork(*): Can not fork: %s", strerror(errno)); |
---|
618 | close(socks[0]); |
---|
619 | close(socks[1]); |
---|
620 | return -1; |
---|
621 | } else if ( r == 0 ) { // we are the child |
---|
622 | close(socks[0]); |
---|
623 | |
---|
624 | close(ROAR_STDIN ); // we do not want roard to have any standard input |
---|
625 | close(ROAR_STDOUT); // STDOUT is also not needed, so we close it, |
---|
626 | // but STDERR we keep open for error messages. |
---|
627 | |
---|
628 | snprintf(fhstr, 7, "%i", socks[1]); |
---|
629 | |
---|
630 | execlp("roard", "roard", "--no-listen", "--client-fh", fhstr, NULL); |
---|
631 | |
---|
632 | // we are still alive? |
---|
633 | ROAR_ERR("roar_socket_open_fork(*): alive after exec(), that's bad!"); |
---|
634 | _exit(1); |
---|
635 | } else { // we are the parent |
---|
636 | close(socks[1]); |
---|
637 | return socks[0]; |
---|
638 | } |
---|
639 | |
---|
640 | return -1; |
---|
641 | #else |
---|
642 | ROAR_ERR("roar_socket_open_fork(*): There is no UNIX Domain Socket support in win32, download a real OS."); |
---|
643 | return -1; |
---|
644 | #endif |
---|
645 | } |
---|
646 | |
---|
647 | int roar_socket_open_file (int mode, char * host, int port) { |
---|
648 | int fh; |
---|
649 | |
---|
650 | if ( mode == MODE_LISTEN ) |
---|
651 | return -1; |
---|
652 | |
---|
653 | if ( (fh = open(host, O_RDONLY, 0644)) == -1 ) { |
---|
654 | ROAR_ERR("roar_socket_open_file(*): Can not open file %s: %s", host, strerror(errno)); |
---|
655 | } |
---|
656 | |
---|
657 | return fh; |
---|
658 | } |
---|
659 | |
---|
660 | // --- [ PROXY CODE ] --- |
---|
661 | |
---|
662 | // generic proxy code: |
---|
663 | |
---|
664 | #ifdef ROAR_SUPPORT_PROXY |
---|
665 | int roar_socket_open_proxy (int mode, int type, char * host, int port, char * proxy_type) { |
---|
666 | int proxy_port = -1; |
---|
667 | char proxy_host[ROAR_SOCKET_MAX_HOSTNAMELEN]; |
---|
668 | char * proxy_addr = NULL; |
---|
669 | int i; |
---|
670 | int fh = -1; |
---|
671 | char * user = NULL, * pw = NULL, * opts = NULL; |
---|
672 | char * sep; |
---|
673 | int no_fh = 0; |
---|
674 | char proxy_addr_buf[1024]; |
---|
675 | static struct passwd * passwd; |
---|
676 | int (* code)(int mode, int fh, char * host, int port, char * user, char * pw, char * opts) = NULL; |
---|
677 | |
---|
678 | if ( passwd == NULL ) { |
---|
679 | passwd = getpwuid(getuid()); |
---|
680 | } |
---|
681 | |
---|
682 | if ( passwd != NULL ) |
---|
683 | user = passwd->pw_name; |
---|
684 | |
---|
685 | if ( user == NULL ) |
---|
686 | user = getenv("USER"); |
---|
687 | |
---|
688 | // TODO: change this so we support listen() proxys (ssh -R) |
---|
689 | if ( mode != MODE_CONNECT ) |
---|
690 | return -1; |
---|
691 | |
---|
692 | if ( !strncmp(proxy_type, "socks", 5) ) { |
---|
693 | proxy_addr = getenv("socks_proxy"); |
---|
694 | |
---|
695 | proxy_port = 9050; // TOR's default port |
---|
696 | } else if ( !strcmp(proxy_type, "http") || !strcmp(proxy_type, "https") ) { |
---|
697 | proxy_port = 8080; |
---|
698 | |
---|
699 | if ( (proxy_addr = getenv("http_proxy")) == NULL ) |
---|
700 | proxy_addr = getenv("https_proxy"); |
---|
701 | |
---|
702 | if ( proxy_addr == NULL ) |
---|
703 | return -1; |
---|
704 | |
---|
705 | if ( !strncmp(proxy_addr, "http://", 7) ) |
---|
706 | proxy_addr += 7; |
---|
707 | } else if ( !strncmp(proxy_type, "ssh", 3) ) { |
---|
708 | proxy_port = 22; |
---|
709 | proxy_addr = getenv("ssh_proxy"); |
---|
710 | no_fh = 1; |
---|
711 | } |
---|
712 | |
---|
713 | proxy_addr_buf[1023] = 0; |
---|
714 | strncpy(proxy_addr_buf, proxy_addr, 1023); |
---|
715 | proxy_addr = proxy_addr_buf; |
---|
716 | |
---|
717 | if ( (sep = strstr(proxy_type, "/")) != NULL ) |
---|
718 | opts = sep+1; |
---|
719 | |
---|
720 | if ( proxy_addr == NULL ) |
---|
721 | return -1; |
---|
722 | |
---|
723 | if ( (sep = strstr(proxy_addr, "@")) != NULL ) { |
---|
724 | *sep = 0; |
---|
725 | user = proxy_addr; |
---|
726 | proxy_addr = sep+1; |
---|
727 | |
---|
728 | if ( (sep = strstr(user, ":")) != NULL ) { |
---|
729 | *sep = 0; |
---|
730 | pw = sep+1; |
---|
731 | } |
---|
732 | } |
---|
733 | |
---|
734 | ROAR_DBG("roar_socket_open_proxy(*): proxy_type='%s', opts='%s', user='%s', pw=(not shown), proxy_addr='%s'", proxy_type, opts, user, proxy_addr); |
---|
735 | |
---|
736 | for (i = 0; proxy_addr[i] != 0 && proxy_addr[i] != ':' && i < ROAR_SOCKET_MAX_HOSTNAMELEN; i++) |
---|
737 | proxy_host[i] = proxy_addr[i]; |
---|
738 | proxy_host[i] = 0; |
---|
739 | |
---|
740 | if ( i == 0 ) // no hostname found |
---|
741 | return -1; |
---|
742 | |
---|
743 | if ( proxy_addr[i] == ':' ) |
---|
744 | proxy_port = atoi(&proxy_addr[i+1]); |
---|
745 | |
---|
746 | if ( ! no_fh ) { |
---|
747 | if ( (fh = roar_socket_open(mode, type, proxy_host, proxy_port)) == -1) { |
---|
748 | return -1; |
---|
749 | } |
---|
750 | } |
---|
751 | |
---|
752 | if ( !strcmp(proxy_type, "socks4a") ) { // for TOR, the only supported type at the moment |
---|
753 | code = roar_socket_open_socks4a; |
---|
754 | } else if ( !strcmp(proxy_type, "socks4d") ) { // DECnet |
---|
755 | code = roar_socket_open_socks4d; |
---|
756 | } else if ( !strcmp(proxy_type, "socks4") ) { // good old SOCKS4 |
---|
757 | code = roar_socket_open_socks4; |
---|
758 | } else if ( !strcmp(proxy_type, "http") ) { // HTTP CONNECT |
---|
759 | code = roar_socket_open_http; |
---|
760 | } else if ( !strncmp(proxy_type, "ssh", 3) ) { // SSH... |
---|
761 | #ifdef ROAR_HAVE_BIN_SSH |
---|
762 | code = roar_socket_open_ssh; |
---|
763 | #else |
---|
764 | ROAR_ERR("roar_socket_open_proxy(*): No SSH support compiled in"); |
---|
765 | #endif |
---|
766 | } else { |
---|
767 | return -1; // unknown type |
---|
768 | } |
---|
769 | |
---|
770 | if ( code != NULL ) { |
---|
771 | if ( no_fh ) { |
---|
772 | fh = code(mode, fh, host, port, user, pw, opts); |
---|
773 | } else { |
---|
774 | if ( code(mode, fh, host, port, user, pw, opts) == -1 ) { |
---|
775 | close(fh); |
---|
776 | return -1; |
---|
777 | } |
---|
778 | } |
---|
779 | |
---|
780 | return fh; |
---|
781 | } |
---|
782 | |
---|
783 | close(fh); |
---|
784 | return -1; |
---|
785 | } |
---|
786 | |
---|
787 | // protocoll dependet proxy code: |
---|
788 | |
---|
789 | int roar_socket_open_socks4 (int mode, int fh, char * host, int port, char * user, char * pw, char * opts) { |
---|
790 | struct hostent * he; |
---|
791 | |
---|
792 | if ( (he = gethostbyname(host)) == NULL ) { |
---|
793 | ROAR_ERR("roar_socket_open_socks4(*): Can\'t resolve host name '%s'", host); |
---|
794 | return -1; |
---|
795 | } |
---|
796 | |
---|
797 | return roar_socket_open_socks4x(mode, fh, he->h_addr, port, NULL, 0, user); |
---|
798 | } |
---|
799 | |
---|
800 | int roar_socket_open_socks4a(int mode, int fh, char * host, int port, char * user, char * pw, char * opts) { |
---|
801 | return roar_socket_open_socks4x(mode, fh, "\0\0\0\1", port, host, strlen(host)+1, user); |
---|
802 | } |
---|
803 | |
---|
804 | int roar_socket_open_socks4d(int mode, int fh, char * host, int port, char * user, char * pw, char * opts) { |
---|
805 | size_t len = strlen(host)+1; |
---|
806 | char * dp; |
---|
807 | |
---|
808 | if ( port == 0 ) { |
---|
809 | if ( (dp = strstr(host, "::")) == NULL ) |
---|
810 | return -1; |
---|
811 | |
---|
812 | len--; |
---|
813 | *dp = 0; |
---|
814 | memmove(dp+1, dp+2, len - (dp-host) - 1); |
---|
815 | } |
---|
816 | |
---|
817 | return roar_socket_open_socks4x(mode, fh, "\0\2\0\0", port, host, len, user); |
---|
818 | } |
---|
819 | |
---|
820 | int roar_socket_open_socks4x(int mode, int fh, char host[4], int port, char * app, size_t app_len, char * user) { |
---|
821 | char buf[9]; |
---|
822 | int len; |
---|
823 | |
---|
824 | buf[0] = 0x04; |
---|
825 | buf[1] = mode == MODE_CONNECT ? 0x01 : 0x02; |
---|
826 | *((uint16_t*)&buf[2]) = htons(port); |
---|
827 | memcpy(buf+4, host, 4); |
---|
828 | |
---|
829 | if ( user == NULL ) { |
---|
830 | buf[8] = 0x00; |
---|
831 | len = 9; |
---|
832 | } else { |
---|
833 | len = 8; |
---|
834 | } |
---|
835 | |
---|
836 | if ( write(fh, buf, len) != len ) |
---|
837 | return -1; |
---|
838 | |
---|
839 | if ( user != NULL ) { |
---|
840 | len = strlen(user) + 1; |
---|
841 | if ( write(fh, user, len) != len ) |
---|
842 | return -1; |
---|
843 | } |
---|
844 | |
---|
845 | if ( app_len > 0 ) |
---|
846 | if ( write(fh, app, app_len) != app_len ) |
---|
847 | return -1; |
---|
848 | |
---|
849 | if ( read(fh, buf, 8) != 8 ) |
---|
850 | return -1; |
---|
851 | |
---|
852 | if ( buf[1] != 0x5a ) |
---|
853 | return -1; |
---|
854 | |
---|
855 | return 0; |
---|
856 | } |
---|
857 | |
---|
858 | int roar_socket_open_http (int mode, int fh, char * host, int port, char * user, char * pw, char * opts) { |
---|
859 | char buf[1024]; |
---|
860 | int len; |
---|
861 | |
---|
862 | if ( port == 0 || host == NULL ) |
---|
863 | return -1; |
---|
864 | |
---|
865 | if ( *host == '/' ) // AF_UNIX |
---|
866 | return -1; |
---|
867 | |
---|
868 | if ( (len = snprintf(buf, 1024, "CONNECT %s:%i HTTP/1.0\r\nUser-Agent: libroar\r\n\r\n", host, port)) == -1 ) |
---|
869 | return -1; |
---|
870 | |
---|
871 | if ( write(fh, buf, len) != len ) |
---|
872 | return -1; |
---|
873 | |
---|
874 | while ( (len = read(fh, buf, 1024)) ) { |
---|
875 | if ( len == 1024 ) { // overlong lion |
---|
876 | return -1; |
---|
877 | } else if ( len == 2 && buf[0] == '\r' && buf[1] == '\n' ) { |
---|
878 | break; |
---|
879 | } else if ( len == 1 && (buf[0] == '\r' || buf[0] == '\n') ) { // bad proxy or devel trying to debug ;) |
---|
880 | break; |
---|
881 | } else if ( len >= 4 && buf[len-4] == '\r' && buf[len-3] == '\n' && buf[len-2] == '\r' && buf[len-1] == '\n' ) { |
---|
882 | break; |
---|
883 | } |
---|
884 | } |
---|
885 | |
---|
886 | return 0; |
---|
887 | } |
---|
888 | |
---|
889 | |
---|
890 | #ifdef ROAR_HAVE_BIN_SSH |
---|
891 | int roar_socket_open_ssh (int mode, int fh, char * host, int port, char * user, char * pw, char * opts) { |
---|
892 | char * proxy_addr = getenv("ssh_proxy"); |
---|
893 | char * sep; |
---|
894 | char cmd[1024] = {0}, rcmd[1024] = {0}; |
---|
895 | int proxy_port = 22; |
---|
896 | int use_socat = 0; |
---|
897 | int r; |
---|
898 | int socks[2]; |
---|
899 | |
---|
900 | if ( host == NULL ) |
---|
901 | return -1; |
---|
902 | |
---|
903 | if ( *host == '/' ) |
---|
904 | use_socat = 1; |
---|
905 | |
---|
906 | if ( mode == MODE_LISTEN ) |
---|
907 | return -1; |
---|
908 | |
---|
909 | if ( proxy_addr == NULL ) |
---|
910 | return -1; |
---|
911 | |
---|
912 | if ( opts != NULL ) { |
---|
913 | if ( !strcmp(opts, "socat") ) { |
---|
914 | use_socat = 1; |
---|
915 | } else if ( !strcmp(opts, "netcat") ) { |
---|
916 | use_socat = 0; |
---|
917 | } else { |
---|
918 | return -1; |
---|
919 | } |
---|
920 | } |
---|
921 | |
---|
922 | ROAR_DBG("roar_socket_open_ssh(*): proxy_addr='%s'", proxy_addr); |
---|
923 | |
---|
924 | if ( (sep = strstr(proxy_addr, "@")) != NULL ) |
---|
925 | proxy_addr = sep+1; |
---|
926 | |
---|
927 | if ( (sep = strstr(proxy_addr, ":")) != NULL ) { |
---|
928 | *sep = 0; |
---|
929 | proxy_port = atoi(sep+1); |
---|
930 | } |
---|
931 | |
---|
932 | |
---|
933 | if ( !strcmp(host, "+fork") ) { |
---|
934 | strncpy(rcmd, "roard --no-listen --client-fh 0", 32); |
---|
935 | } else { |
---|
936 | if ( use_socat ) { |
---|
937 | if ( *host == '/' ) { |
---|
938 | snprintf(rcmd, 1023, "socat stdio unix-connect:\"%s\"", host); |
---|
939 | } else { |
---|
940 | snprintf(rcmd, 1023, "socat stdio tcp:\"%s\":%i", host, port); |
---|
941 | } |
---|
942 | } else { |
---|
943 | snprintf(rcmd, 1023, "$(which netcat nc 2> /dev/null | grep -v \" \" | head -n 1) \"%s\" %i", host, port); |
---|
944 | } |
---|
945 | |
---|
946 | rcmd[1023] = 0; |
---|
947 | } |
---|
948 | |
---|
949 | ROAR_DBG("roar_socket_open_ssh(*): proxy_port=%i, user='%s', proxy_addr='%s'", proxy_port, user, proxy_addr); |
---|
950 | ROAR_DBG("roar_socket_open_ssh(*): rcmd: %s", rcmd); |
---|
951 | snprintf(cmd, 1023, ROAR_HAVE_BIN_SSH " -p %i -l '%s' '%s' '%s'", proxy_port, user, proxy_addr, rcmd); |
---|
952 | cmd[1023] = 0; |
---|
953 | |
---|
954 | |
---|
955 | if ( socketpair(AF_UNIX, SOCK_STREAM, 0, socks) == -1 ) { |
---|
956 | return -1; |
---|
957 | } |
---|
958 | |
---|
959 | r = fork(); |
---|
960 | |
---|
961 | if ( r == -1 ) { // error! |
---|
962 | ROAR_ERR("roar_socket_open_ssh(*): Can not fork: %s", strerror(errno)); |
---|
963 | close(socks[0]); |
---|
964 | close(socks[1]); |
---|
965 | return -1; |
---|
966 | } else if ( r == 0 ) { // we are the child |
---|
967 | close(socks[0]); |
---|
968 | |
---|
969 | close(ROAR_STDIN ); // we do not want roard to have any standard input |
---|
970 | close(ROAR_STDOUT); // STDOUT is also not needed, so we close it, |
---|
971 | // but STDERR we keep open for error messages. |
---|
972 | |
---|
973 | dup2(socks[1], 0); |
---|
974 | dup2(socks[1], 1); |
---|
975 | |
---|
976 | execlp("sh", "sh", "-c", cmd, NULL); |
---|
977 | |
---|
978 | // we are still alive? |
---|
979 | ROAR_ERR("roar_socket_open_ssh(*): alive after exec(), that's bad!"); |
---|
980 | _exit(1); |
---|
981 | } else { // we are the parent |
---|
982 | close(socks[1]); |
---|
983 | return socks[0]; |
---|
984 | } |
---|
985 | return -1; |
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986 | } |
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987 | #endif |
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988 | |
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989 | #endif // ROAR_SUPPORT_PROXY |
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990 | |
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991 | //ll |
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