1 | /********************************************************************\ |
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2 | * BitlBee -- An IRC to other IM-networks gateway * |
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3 | * * |
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4 | * Copyright 2008 Uli Meis * |
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5 | * Copyright 2006 Marijn Kruisselbrink and others * |
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6 | \********************************************************************/ |
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7 | |
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8 | /* MSN module - File transfer support */ |
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9 | |
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10 | /* |
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11 | This program is free software; you can redistribute it and/or modify |
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12 | it under the terms of the GNU General Public License as published by |
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13 | the Free Software Foundation; either version 2 of the License, or |
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14 | (at your option) any later version. |
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15 | |
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16 | This program is distributed in the hope that it will be useful, |
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17 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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19 | GNU General Public License for more details. |
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20 | |
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21 | You should have received a copy of the GNU General Public License with |
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22 | the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL; |
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23 | if not, write to the Free Software Foundation, Inc., 59 Temple Place, |
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24 | Suite 330, Boston, MA 02111-1307 USA |
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25 | */ |
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26 | |
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27 | #include "bitlbee.h" |
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28 | #include "invitation.h" |
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29 | #include "msn.h" |
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30 | |
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31 | #ifdef debug |
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32 | #undef debug |
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33 | #endif |
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34 | #define debug(msg...) log_message( LOGLVL_INFO, msg ) |
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35 | |
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36 | static void msn_ftp_free( file_transfer_t *file ); |
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37 | static void msn_ftpr_accept( file_transfer_t *file ); |
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38 | static void msn_ftp_finished( file_transfer_t *file ); |
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39 | static void msn_ftp_canceled( file_transfer_t *file, char *reason ); |
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40 | static gboolean msn_ftpr_write_request( file_transfer_t *file ); |
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41 | |
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42 | static gboolean msn_ftp_connected( gpointer data, gint fd, b_input_condition cond ); |
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43 | static gboolean msn_ftp_read( gpointer data, gint fd, b_input_condition cond ); |
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44 | gboolean msn_ftps_write( file_transfer_t *file, char *buffer, unsigned int len ); |
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45 | |
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46 | /* |
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47 | * Vararg wrapper for imcb_file_canceled(). |
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48 | */ |
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49 | gboolean msn_ftp_abort( file_transfer_t *file, char *format, ... ) |
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50 | { |
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51 | va_list params; |
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52 | va_start( params, format ); |
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53 | char error[128]; |
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54 | |
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55 | if( vsnprintf( error, 128, format, params ) < 0 ) |
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56 | sprintf( error, "internal error parsing error string (BUG)" ); |
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57 | va_end( params ); |
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58 | imcb_file_canceled( file, error ); |
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59 | return FALSE; |
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60 | } |
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61 | |
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62 | /* very useful */ |
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63 | #define ASSERTSOCKOP(op, msg) \ |
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64 | if( (op) == -1 ) \ |
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65 | return msn_ftp_abort( file , msg ": %s", strerror( errno ) ); |
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66 | |
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67 | /* |
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68 | * Creates a listening socket and returns its address in host, port. |
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69 | */ |
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70 | gboolean msn_ftp_listen( msn_filetransfer_t *msn_file, char *host, char *port ) |
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71 | { |
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72 | file_transfer_t *file = msn_file->dcc; |
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73 | int fd,gret; |
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74 | char hostname[ HOST_NAME_MAX + 1 ]; |
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75 | struct addrinfo hints, *rp; |
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76 | struct sockaddr_storage saddrst, *saddr = &saddrst; |
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77 | socklen_t ssize = sizeof( struct sockaddr_storage ); |
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78 | |
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79 | /* won't be long till someone asks for this to be configurable :) */ |
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80 | |
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81 | ASSERTSOCKOP( gethostname( hostname, sizeof( hostname ) ), "gethostname()" ); |
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82 | |
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83 | memset( &hints, 0, sizeof( struct addrinfo ) ); |
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84 | hints.ai_socktype = SOCK_STREAM; |
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85 | hints.ai_flags = AI_NUMERICSERV; |
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86 | |
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87 | if ( ( gret = getaddrinfo( hostname, "0", &hints, &rp ) ) != 0 ) |
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88 | return msn_ftp_abort( file, "getaddrinfo() failed: %s", gai_strerror( gret ) ); |
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89 | |
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90 | memcpy( saddr, rp->ai_addr, rp->ai_addrlen ); |
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91 | |
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92 | ASSERTSOCKOP( fd = msn_file->fd = socket( saddr->ss_family, SOCK_STREAM, 0 ), "Opening socket" ); |
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93 | |
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94 | ASSERTSOCKOP( bind( fd, ( struct sockaddr *)saddr, rp->ai_addrlen ), "Binding socket" ); |
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95 | |
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96 | freeaddrinfo( rp ); |
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97 | |
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98 | ASSERTSOCKOP( listen( fd, 1 ), "Making socket listen" ); |
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99 | |
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100 | if ( !inet_ntop( saddr->ss_family, saddr->ss_family == AF_INET ? |
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101 | ( void * )&( ( struct sockaddr_in * ) saddr )->sin_addr.s_addr : ( void * )&( ( struct sockaddr_in6 * ) saddr )->sin6_addr.s6_addr |
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102 | , host, INET6_ADDRSTRLEN ) ) |
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103 | return msn_ftp_abort( file, "inet_ntop failed on listening socket" ); |
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104 | |
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105 | ASSERTSOCKOP( getsockname( fd, ( struct sockaddr *)saddr, &ssize ), "Getting socket name" ); |
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106 | |
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107 | if( saddr->ss_family == AF_INET ) |
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108 | sprintf( port, "%d", ntohs( ( ( struct sockaddr_in *) saddr )->sin_port ) ); |
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109 | else |
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110 | sprintf( port, "%d", ntohs( ( ( struct sockaddr_in6 *) saddr )->sin6_port ) ); |
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111 | |
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112 | return TRUE; |
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113 | } |
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114 | |
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115 | void msn_ftp_invitation_cmd( struct im_connection *ic, char *who, int cookie, char *icmd, |
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116 | char *trailer ) |
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117 | { |
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118 | struct msn_message *m = g_new0( struct msn_message, 1 ); |
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119 | |
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120 | m->text = g_strdup_printf( "%s" |
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121 | "Invitation-Command: %s\r\n" |
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122 | "Invitation-Cookie: %u\r\n" |
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123 | "%s", |
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124 | MSN_INVITE_HEADERS, |
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125 | icmd, |
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126 | cookie, |
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127 | trailer); |
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128 | |
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129 | m->who = g_strdup( who ); |
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130 | |
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131 | msn_sb_write_msg( ic, m ); |
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132 | } |
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133 | |
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134 | void msn_ftp_cancel_invite( struct im_connection *ic, char *who, int cookie, char *code ) |
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135 | { |
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136 | char buf[64]; |
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137 | |
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138 | g_snprintf( buf, sizeof( buf ), "Cancel-Code: %s\r\n", code ); |
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139 | msn_ftp_invitation_cmd( ic, who, cookie, "CANCEL", buf ); |
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140 | } |
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141 | |
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142 | void msn_ftp_transfer_request( struct im_connection *ic, file_transfer_t *file, char *who ) |
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143 | { |
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144 | unsigned int cookie = time( NULL ); /* TODO: randomize */ |
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145 | char buf[2048]; |
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146 | |
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147 | msn_filetransfer_t *msn_file = g_new0( msn_filetransfer_t, 1 ); |
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148 | file->data = msn_file; |
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149 | file->free = msn_ftp_free; |
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150 | file->canceled = msn_ftp_canceled; |
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151 | file->write = msn_ftps_write; |
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152 | msn_file->md = ic->proto_data; |
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153 | msn_file->invite_cookie = cookie; |
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154 | msn_file->handle = g_strdup( who ); |
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155 | msn_file->dcc = file; |
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156 | msn_file->md->filetransfers = g_slist_prepend( msn_file->md->filetransfers, msn_file->dcc ); |
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157 | msn_file->fd = -1; |
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158 | msn_file->sbufpos = 3; |
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159 | |
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160 | g_snprintf( buf, sizeof( buf ), |
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161 | "Application-Name: File Transfer\r\n" |
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162 | "Application-GUID: {5D3E02AB-6190-11d3-BBBB-00C04F795683}\r\n" |
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163 | "Application-File: %s\r\n" |
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164 | "Application-FileSize: %zd\r\n", |
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165 | file->file_name, |
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166 | file->file_size); |
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167 | |
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168 | msn_ftp_invitation_cmd( msn_file->md->ic, msn_file->handle, cookie, "INVITE", buf ); |
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169 | |
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170 | imcb_file_recv_start( file ); |
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171 | } |
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172 | |
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173 | void msn_invitation_invite( struct msn_switchboard *sb, char *handle, unsigned int cookie, char *body, int blen ) |
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174 | { |
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175 | char *itype = msn_findheader( body, "Application-GUID:", blen ); |
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176 | char *name, *size, *invitecookie, *reject = NULL; |
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177 | user_t *u; |
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178 | size_t isize; |
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179 | file_transfer_t *file; |
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180 | |
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181 | if( !itype || strcmp( itype, "{5D3E02AB-6190-11d3-BBBB-00C04F795683}" ) != 0 ) { |
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182 | /* Don't know what that is - don't care */ |
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183 | char *iname = msn_findheader( body, "Application-Name:", blen ); |
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184 | imcb_log( sb->ic, "Received unknown MSN invitation %s (%s) from %s", |
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185 | itype ? : "with no GUID", iname ? iname : "no application name", handle ); |
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186 | g_free( iname ); |
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187 | reject = "REJECT_NOT_INSTALLED"; |
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188 | } else if ( |
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189 | !( name = msn_findheader( body, "Application-File:", blen )) || |
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190 | !( size = msn_findheader( body, "Application-FileSize:", blen )) || |
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191 | !( invitecookie = msn_findheader( body, "Invitation-Cookie:", blen)) || |
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192 | !( isize = atoll( size ) ) ) { |
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193 | imcb_log( sb->ic, "Received corrupted transfer request from %s" |
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194 | "(name=%s, size=%s, invitecookie=%s)", |
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195 | handle, name, size, invitecookie ); |
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196 | reject = "REJECT"; |
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197 | } else if ( !( u = user_findhandle( sb->ic, handle ) ) ) { |
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198 | imcb_log( sb->ic, "Error in parsing transfer request, User '%s'" |
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199 | "is not in contact list", handle ); |
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200 | reject = "REJECT"; |
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201 | } else if ( !( file = imcb_file_send_start( sb->ic, handle, name, isize ) ) ) { |
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202 | imcb_log( sb->ic, "Error initiating transfer for request from %s for %s", |
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203 | handle, name ); |
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204 | reject = "REJECT"; |
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205 | } else { |
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206 | msn_filetransfer_t *msn_file = g_new0( msn_filetransfer_t, 1 ); |
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207 | file->data = msn_file; |
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208 | file->accept = msn_ftpr_accept; |
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209 | file->free = msn_ftp_free; |
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210 | file->finished = msn_ftp_finished; |
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211 | file->canceled = msn_ftp_canceled; |
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212 | file->write_request = msn_ftpr_write_request; |
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213 | msn_file->md = sb->ic->proto_data; |
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214 | msn_file->invite_cookie = cookie; |
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215 | msn_file->handle = g_strdup( handle ); |
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216 | msn_file->dcc = file; |
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217 | msn_file->md->filetransfers = g_slist_prepend( msn_file->md->filetransfers, msn_file->dcc ); |
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218 | msn_file->fd = -1; |
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219 | } |
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220 | |
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221 | if( reject ) |
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222 | msn_ftp_cancel_invite( sb->ic, sb->who, cookie, reject ); |
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223 | |
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224 | g_free( name ); |
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225 | g_free( size ); |
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226 | g_free( invitecookie ); |
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227 | g_free( itype ); |
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228 | } |
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229 | |
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230 | msn_filetransfer_t* msn_find_filetransfer( struct msn_data *md, unsigned int cookie, char *handle ) |
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231 | { |
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232 | GSList *l; |
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233 | |
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234 | for( l = md->filetransfers; l; l = l->next ) { |
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235 | msn_filetransfer_t *file = ( (file_transfer_t*) l->data )->data; |
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236 | if( file->invite_cookie == cookie && strcmp( handle, file->handle ) == 0 ) { |
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237 | return file; |
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238 | } |
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239 | } |
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240 | return NULL; |
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241 | } |
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242 | |
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243 | gboolean msn_ftps_connected( gpointer data, gint fd, b_input_condition cond ) |
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244 | { |
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245 | file_transfer_t *file = data; |
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246 | msn_filetransfer_t *msn_file = file->data; |
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247 | struct sockaddr_storage clt_addr; |
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248 | socklen_t ssize = sizeof( clt_addr ); |
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249 | |
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250 | debug( "Connected to MSNFTP client" ); |
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251 | |
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252 | ASSERTSOCKOP( msn_file->fd = accept( fd, (struct sockaddr *) &clt_addr, &ssize ), "Accepting connection" ); |
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253 | |
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254 | closesocket( fd ); |
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255 | fd = msn_file->fd; |
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256 | sock_make_nonblocking( fd ); |
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257 | |
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258 | msn_file->r_event_id = b_input_add( fd, GAIM_INPUT_READ, msn_ftp_read, file ); |
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259 | |
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260 | return FALSE; |
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261 | } |
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262 | |
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263 | void msn_invitations_accept( msn_filetransfer_t *msn_file, struct msn_switchboard *sb, char *handle, unsigned int cookie, char *body, int blen ) |
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264 | { |
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265 | file_transfer_t *file = msn_file->dcc; |
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266 | char buf[1024]; |
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267 | unsigned int acookie = time ( NULL ); |
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268 | char host[INET6_ADDRSTRLEN]; |
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269 | char port[6]; |
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270 | |
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271 | msn_file->auth_cookie = acookie; |
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272 | |
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273 | if( !msn_ftp_listen( msn_file, host, port ) ) |
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274 | return; |
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275 | |
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276 | msn_file->r_event_id = b_input_add( msn_file->fd, GAIM_INPUT_READ, msn_ftps_connected, file ); |
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277 | |
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278 | g_snprintf( buf, sizeof( buf ), |
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279 | "IP-Address: %s\r\n" |
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280 | "Port: %s\r\n" |
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281 | "AuthCookie: %d\r\n" |
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282 | "Launch-Application: FALSE\r\n" |
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283 | "Request-Data: IP-Address:\r\n\r\n", |
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284 | host, |
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285 | port, |
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286 | msn_file->auth_cookie ); |
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287 | |
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288 | msn_ftp_invitation_cmd( msn_file->md->ic, handle, msn_file->invite_cookie, "ACCEPT", buf ); |
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289 | } |
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290 | |
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291 | void msn_invitationr_accept( msn_filetransfer_t *msn_file, struct msn_switchboard *sb, char *handle, unsigned int cookie, char *body, int blen ) { |
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292 | file_transfer_t *file = msn_file->dcc; |
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293 | char *authcookie, *ip, *port; |
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294 | |
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295 | if( !( authcookie = msn_findheader( body, "AuthCookie:", blen ) ) || |
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296 | !( ip = msn_findheader( body, "IP-Address:", blen ) ) || |
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297 | !( port = msn_findheader( body, "Port:", blen ) ) ) { |
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298 | msn_ftp_abort( file, "Received invalid accept reply" ); |
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299 | } else if( |
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300 | ( msn_file->fd = proxy_connect( ip, atoi( port ), msn_ftp_connected, file ) ) |
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301 | < 0 ) { |
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302 | msn_ftp_abort( file, "Error connecting to MSN client" ); |
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303 | } else |
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304 | msn_file->auth_cookie = strtoul( authcookie, NULL, 10 ); |
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305 | |
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306 | g_free( authcookie ); |
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307 | g_free( ip ); |
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308 | g_free( port ); |
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309 | } |
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310 | |
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311 | void msn_invitation_accept( struct msn_switchboard *sb, char *handle, unsigned int cookie, char *body, int blen ) |
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312 | { |
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313 | msn_filetransfer_t *msn_file = msn_find_filetransfer( sb->ic->proto_data, cookie, handle ); |
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314 | file_transfer_t *file = msn_file ? msn_file->dcc : NULL; |
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315 | |
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316 | if( !msn_file ) |
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317 | imcb_log( sb->ic, "Received invitation ACCEPT message for unknown invitation (already aborted?)" ); |
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318 | else if( file->sending ) |
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319 | msn_invitations_accept( msn_file, sb, handle, cookie, body, blen ); |
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320 | else |
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321 | msn_invitationr_accept( msn_file, sb, handle, cookie, body, blen ); |
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322 | } |
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323 | |
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324 | void msn_invitation_cancel( struct msn_switchboard *sb, char *handle, unsigned int cookie, char *body, int blen ) |
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325 | { |
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326 | msn_filetransfer_t *msn_file = msn_find_filetransfer( sb->ic->proto_data, cookie, handle ); |
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327 | |
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328 | if( !msn_file ) |
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329 | imcb_log( sb->ic, "Received invitation CANCEL message for unknown invitation (already aborted?)" ); |
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330 | else |
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331 | msn_ftp_abort( msn_file->dcc, msn_findheader( body, "Cancel-Code:", blen ) ); |
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332 | } |
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333 | |
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334 | int msn_ftp_write( file_transfer_t *file, char *format, ... ) |
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335 | { |
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336 | msn_filetransfer_t *msn_file = file->data; |
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337 | va_list params; |
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338 | int st; |
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339 | char *s; |
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340 | |
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341 | va_start( params, format ); |
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342 | s = g_strdup_vprintf( format, params ); |
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343 | va_end( params ); |
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344 | |
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345 | st = write( msn_file->fd, s, strlen( s ) ); |
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346 | if( st != strlen( s ) ) |
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347 | return msn_ftp_abort( file, "Error sending data over MSNFTP connection: %s", |
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348 | strerror( errno ) ); |
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349 | |
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350 | g_free( s ); |
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351 | return 1; |
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352 | } |
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353 | |
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354 | gboolean msn_ftp_connected( gpointer data, gint fd, b_input_condition cond ) |
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355 | { |
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356 | file_transfer_t *file = data; |
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357 | msn_filetransfer_t *msn_file = file->data; |
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358 | |
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359 | debug( "Connected to MSNFTP server, starting authentication" ); |
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360 | if( !msn_ftp_write( file, "VER MSNFTP\r\n" ) ) |
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361 | return FALSE; |
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362 | |
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363 | sock_make_nonblocking( msn_file->fd ); |
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364 | msn_file->r_event_id = b_input_add( msn_file->fd, GAIM_INPUT_READ, msn_ftp_read, file ); |
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365 | |
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366 | return FALSE; |
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367 | } |
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368 | |
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369 | gboolean msn_ftp_handle_command( file_transfer_t *file, char* line ) |
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370 | { |
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371 | msn_filetransfer_t *msn_file = file->data; |
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372 | char **cmd = msn_linesplit( line ); |
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373 | int count = 0; |
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374 | if( cmd[0] ) while( cmd[++count] ); |
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375 | |
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376 | if( count < 1 ) |
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377 | return msn_ftp_abort( file, "Missing command in MSNFTP communication" ); |
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378 | |
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379 | if( strcmp( cmd[0], "VER" ) == 0 ) { |
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380 | if( strcmp( cmd[1], "MSNFTP" ) != 0 ) |
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381 | return msn_ftp_abort( file, "Unsupported filetransfer protocol: %s", cmd[1] ); |
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382 | if( file->sending ) |
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383 | msn_ftp_write( file, "VER MSNFTP\r\n" ); |
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384 | else |
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385 | msn_ftp_write( file, "USR %s %u\r\n", msn_file->md->ic->acc->user, msn_file->auth_cookie ); |
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386 | } else if( strcmp( cmd[0], "FIL" ) == 0 ) { |
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387 | if( strtoul( cmd[1], NULL, 10 ) != file->file_size ) |
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388 | return msn_ftp_abort( file, "FIL reply contains a different file size than the size in the invitation" ); |
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389 | msn_ftp_write( file, "TFR\r\n" ); |
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390 | msn_file->status |= MSN_TRANSFER_RECEIVING; |
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391 | } else if( strcmp( cmd[0], "USR" ) == 0 ) { |
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392 | if( ( strcmp( cmd[1], msn_file->handle ) != 0 ) || |
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393 | ( strtoul( cmd[2], NULL, 10 ) != msn_file->auth_cookie ) ) |
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394 | msn_ftp_abort( file, "Authentication failed. " |
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395 | "Expected handle: %s (got %s), cookie: %u (got %s)", |
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396 | msn_file->handle, cmd[1], |
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397 | msn_file->auth_cookie, cmd[2] ); |
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398 | msn_ftp_write( file, "FIL %zu\r\n", file->file_size); |
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399 | } else if( strcmp( cmd[0], "TFR" ) == 0 ) { |
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400 | file->write_request( file ); |
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401 | } else if( strcmp( cmd[0], "BYE" ) == 0 ) { |
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402 | unsigned int retcode = count > 1 ? atoi(cmd[1]) : 1; |
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403 | |
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404 | if( ( retcode==16777989 ) || ( retcode==16777987 ) ) |
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405 | imcb_file_finished( file ); |
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406 | else if( retcode==2147942405 ) |
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407 | imcb_file_canceled( file, "Failure: receiver is out of disk space" ); |
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408 | else if( retcode==2164261682 ) |
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409 | imcb_file_canceled( file, "Failure: receiver cancelled the transfer" ); |
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410 | else if( retcode==2164261683 ) |
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411 | imcb_file_canceled( file, "Failure: sender has cancelled the transfer" ); |
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412 | else if( retcode==2164261694 ) |
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413 | imcb_file_canceled( file, "Failure: connection is blocked" ); |
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414 | else { |
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415 | char buf[128]; |
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416 | |
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417 | sprintf( buf, "Failure: unknown BYE code: %d", retcode); |
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418 | imcb_file_canceled( file, buf ); |
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419 | } |
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420 | } else if( strcmp( cmd[0], "CCL" ) == 0 ) { |
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421 | imcb_file_canceled( file, "Failure: receiver cancelled the transfer" ); |
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422 | } else { |
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423 | msn_ftp_abort( file, "Received invalid command %s from msn client", cmd[0] ); |
---|
424 | } |
---|
425 | return TRUE; |
---|
426 | } |
---|
427 | |
---|
428 | gboolean msn_ftp_send( gpointer data, gint fd, b_input_condition cond ) |
---|
429 | { |
---|
430 | file_transfer_t *file = data; |
---|
431 | msn_filetransfer_t *msn_file = file->data; |
---|
432 | |
---|
433 | msn_file->w_event_id = 0; |
---|
434 | |
---|
435 | file->write_request( file ); |
---|
436 | |
---|
437 | return FALSE; |
---|
438 | } |
---|
439 | |
---|
440 | /* |
---|
441 | * This should only be called if we can write, so just do it. |
---|
442 | * Add a write watch so we can write more during the next cycle (if possible). |
---|
443 | * This got a bit complicated because (at least) amsn expects packets of size 2045. |
---|
444 | */ |
---|
445 | gboolean msn_ftps_write( file_transfer_t *file, char *buffer, unsigned int len ) |
---|
446 | { |
---|
447 | msn_filetransfer_t *msn_file = file->data; |
---|
448 | int ret, overflow; |
---|
449 | |
---|
450 | /* what we can't send now */ |
---|
451 | overflow = msn_file->sbufpos + len - MSNFTP_PSIZE; |
---|
452 | |
---|
453 | /* append what we can do the send buffer */ |
---|
454 | memcpy( msn_file->sbuf + msn_file->sbufpos, buffer, MIN( len, MSNFTP_PSIZE - msn_file->sbufpos ) ); |
---|
455 | msn_file->sbufpos += MIN( len, MSNFTP_PSIZE - msn_file->sbufpos ); |
---|
456 | |
---|
457 | /* if we don't have enough for a full packet and there's more wait for it */ |
---|
458 | if( ( msn_file->sbufpos < MSNFTP_PSIZE ) && |
---|
459 | ( msn_file->data_sent + msn_file->sbufpos - 3 < file->file_size ) ) { |
---|
460 | if( !msn_file->w_event_id ) |
---|
461 | msn_file->w_event_id = b_input_add( msn_file->fd, GAIM_INPUT_WRITE, msn_ftp_send, file ); |
---|
462 | return TRUE; |
---|
463 | } |
---|
464 | |
---|
465 | /* Accumulated enough data, lets send something out */ |
---|
466 | |
---|
467 | msn_file->sbuf[0] = 0; |
---|
468 | msn_file->sbuf[1] = ( msn_file->sbufpos - 3 ) & 0xff; |
---|
469 | msn_file->sbuf[2] = ( ( msn_file->sbufpos - 3 ) >> 8 ) & 0xff; |
---|
470 | |
---|
471 | ASSERTSOCKOP( ret = send( msn_file->fd, msn_file->sbuf, msn_file->sbufpos, 0 ), "Sending" ); |
---|
472 | |
---|
473 | msn_file->data_sent += ret - 3; |
---|
474 | |
---|
475 | /* TODO: this should really not be fatal */ |
---|
476 | if( ret < msn_file->sbufpos ) |
---|
477 | return msn_ftp_abort( file, "send() sent %d instead of %d (send buffer full!)", ret, msn_file->sbufpos ); |
---|
478 | |
---|
479 | msn_file->sbufpos = 3; |
---|
480 | |
---|
481 | if( overflow > 0 ) { |
---|
482 | while( overflow > ( MSNFTP_PSIZE - 3 ) ) { |
---|
483 | if( !msn_ftps_write( file, buffer + len - overflow, MSNFTP_PSIZE - 3 ) ) |
---|
484 | return FALSE; |
---|
485 | overflow -= MSNFTP_PSIZE - 3; |
---|
486 | } |
---|
487 | return msn_ftps_write( file, buffer + len - overflow, overflow ); |
---|
488 | } |
---|
489 | |
---|
490 | if( msn_file->data_sent == file->file_size ) { |
---|
491 | if( msn_file->w_event_id ) { |
---|
492 | b_event_remove( msn_file->w_event_id ); |
---|
493 | msn_file->w_event_id = 0; |
---|
494 | } |
---|
495 | } else { |
---|
496 | /* we might already be listening if this is data from an overflow */ |
---|
497 | if( !msn_file->w_event_id ) |
---|
498 | msn_file->w_event_id = b_input_add( msn_file->fd, GAIM_INPUT_WRITE, msn_ftp_send, file ); |
---|
499 | } |
---|
500 | |
---|
501 | return TRUE; |
---|
502 | } |
---|
503 | |
---|
504 | /* Binary part of the file transfer protocol */ |
---|
505 | gboolean msn_ftpr_read( file_transfer_t *file ) |
---|
506 | { |
---|
507 | msn_filetransfer_t *msn_file = file->data; |
---|
508 | int st; |
---|
509 | unsigned char buf[3]; |
---|
510 | |
---|
511 | if( msn_file->data_remaining ) { |
---|
512 | msn_file->r_event_id = 0; |
---|
513 | |
---|
514 | ASSERTSOCKOP( st = read( msn_file->fd, file->buffer, MIN( sizeof( file->buffer ), msn_file->data_remaining ) ), "Receiving" ); |
---|
515 | |
---|
516 | if( st == 0 ) |
---|
517 | return msn_ftp_abort( file, "Remote end closed connection"); |
---|
518 | |
---|
519 | msn_file->data_sent += st; |
---|
520 | |
---|
521 | msn_file->data_remaining -= st; |
---|
522 | |
---|
523 | file->write( file, file->buffer, st ); |
---|
524 | |
---|
525 | if( msn_file->data_sent >= file->file_size ) |
---|
526 | imcb_file_finished( file ); |
---|
527 | |
---|
528 | return FALSE; |
---|
529 | } else { |
---|
530 | ASSERTSOCKOP( st = read( msn_file->fd, buf, 1 ), "Receiving" ); |
---|
531 | if( st == 0 ) { |
---|
532 | return msn_ftp_abort( file, "read returned EOF while reading data header from msn client" ); |
---|
533 | } else if( buf[0] == '\r' || buf[0] == '\n' ) { |
---|
534 | debug( "Discarding extraneous newline" ); |
---|
535 | } else if( buf[0] != 0 ) { |
---|
536 | msn_ftp_abort( file, "Remote end canceled the transfer"); |
---|
537 | /* don't really care about these last 2 (should be 0,0) */ |
---|
538 | read( msn_file->fd, buf, 2 ); |
---|
539 | return FALSE; |
---|
540 | } else { |
---|
541 | unsigned int size; |
---|
542 | ASSERTSOCKOP( st = read( msn_file->fd, buf, 2 ), "Receiving" ); |
---|
543 | if( st < 2 ) |
---|
544 | return msn_ftp_abort( file, "read returned EOF while reading data header from msn client" ); |
---|
545 | |
---|
546 | size = buf[0] + ((unsigned int) buf[1] << 8); |
---|
547 | msn_file->data_remaining = size; |
---|
548 | } |
---|
549 | } |
---|
550 | return TRUE; |
---|
551 | } |
---|
552 | |
---|
553 | /* Text mode part of the file transfer protocol */ |
---|
554 | gboolean msn_ftp_txtproto( file_transfer_t *file ) |
---|
555 | { |
---|
556 | msn_filetransfer_t *msn_file = file->data; |
---|
557 | int i = msn_file->tbufpos, st; |
---|
558 | char *tbuf = msn_file->tbuf; |
---|
559 | |
---|
560 | ASSERTSOCKOP( st = read( msn_file->fd, |
---|
561 | tbuf + msn_file->tbufpos, |
---|
562 | sizeof( msn_file->tbuf ) - msn_file->tbufpos ), |
---|
563 | "Receiving" ); |
---|
564 | |
---|
565 | if( st == 0 ) |
---|
566 | return msn_ftp_abort( file, "read returned EOF while reading text from msn client" ); |
---|
567 | |
---|
568 | msn_file->tbufpos += st; |
---|
569 | |
---|
570 | do { |
---|
571 | for( ;i < msn_file->tbufpos; i++ ) { |
---|
572 | if( tbuf[i] == '\n' || tbuf[i] == '\r' ) { |
---|
573 | tbuf[i] = '\0'; |
---|
574 | if( i > 0 ) |
---|
575 | msn_ftp_handle_command( file, tbuf ); |
---|
576 | else |
---|
577 | while( tbuf[i] == '\n' || tbuf[i] == '\r' ) i++; |
---|
578 | memmove( tbuf, tbuf + i + 1, msn_file->tbufpos - i - 1 ); |
---|
579 | msn_file->tbufpos -= i + 1; |
---|
580 | i = 0; |
---|
581 | break; |
---|
582 | } |
---|
583 | } |
---|
584 | } while ( i < msn_file->tbufpos ); |
---|
585 | |
---|
586 | if( msn_file->tbufpos == sizeof( msn_file->tbuf ) ) |
---|
587 | return msn_ftp_abort( file, |
---|
588 | "Line exceeded %d bytes in text protocol", |
---|
589 | sizeof( msn_file->tbuf ) ); |
---|
590 | return TRUE; |
---|
591 | } |
---|
592 | |
---|
593 | gboolean msn_ftp_read( gpointer data, gint fd, b_input_condition cond ) |
---|
594 | { |
---|
595 | file_transfer_t *file = data; |
---|
596 | msn_filetransfer_t *msn_file = file->data; |
---|
597 | |
---|
598 | if( msn_file->status & MSN_TRANSFER_RECEIVING ) |
---|
599 | return msn_ftpr_read( file ); |
---|
600 | else |
---|
601 | return msn_ftp_txtproto( file ); |
---|
602 | } |
---|
603 | |
---|
604 | void msn_ftp_free( file_transfer_t *file ) |
---|
605 | { |
---|
606 | msn_filetransfer_t *msn_file = file->data; |
---|
607 | |
---|
608 | if( msn_file->r_event_id ) |
---|
609 | b_event_remove( msn_file->r_event_id ); |
---|
610 | |
---|
611 | if( msn_file->w_event_id ) |
---|
612 | b_event_remove( msn_file->w_event_id ); |
---|
613 | |
---|
614 | if( msn_file->fd != -1 ) |
---|
615 | closesocket( msn_file->fd ); |
---|
616 | |
---|
617 | msn_file->md->filetransfers = g_slist_remove( msn_file->md->filetransfers, msn_file->dcc ); |
---|
618 | |
---|
619 | g_free( msn_file->handle ); |
---|
620 | |
---|
621 | g_free( msn_file ); |
---|
622 | } |
---|
623 | |
---|
624 | void msn_ftpr_accept( file_transfer_t *file ) |
---|
625 | { |
---|
626 | msn_filetransfer_t *msn_file = file->data; |
---|
627 | |
---|
628 | msn_ftp_invitation_cmd( msn_file->md->ic, msn_file->handle, msn_file->invite_cookie, "ACCEPT", |
---|
629 | "Launch-Application: FALSE\r\n" |
---|
630 | "Request-Data: IP-Address:\r\n"); |
---|
631 | } |
---|
632 | |
---|
633 | void msn_ftp_finished( file_transfer_t *file ) |
---|
634 | { |
---|
635 | msn_ftp_write( file, "BYE 16777989\r\n" ); |
---|
636 | } |
---|
637 | |
---|
638 | void msn_ftp_canceled( file_transfer_t *file, char *reason ) |
---|
639 | { |
---|
640 | msn_filetransfer_t *msn_file = file->data; |
---|
641 | |
---|
642 | msn_ftp_cancel_invite( msn_file->md->ic, msn_file->handle, |
---|
643 | msn_file->invite_cookie, |
---|
644 | file->status & FT_STATUS_TRANSFERRING ? |
---|
645 | "FTTIMEOUT" : |
---|
646 | "FAIL" ); |
---|
647 | |
---|
648 | imcb_log( msn_file->md->ic, "File transfer aborted: %s", reason ); |
---|
649 | } |
---|
650 | |
---|
651 | gboolean msn_ftpr_write_request( file_transfer_t *file ) |
---|
652 | { |
---|
653 | msn_filetransfer_t *msn_file = file->data; |
---|
654 | if( msn_file->r_event_id != 0 ) { |
---|
655 | msn_ftp_abort( file, |
---|
656 | "BUG in MSN file transfer:" |
---|
657 | "write_request called when" |
---|
658 | "already watching for input" ); |
---|
659 | return FALSE; |
---|
660 | } |
---|
661 | |
---|
662 | msn_file->r_event_id = |
---|
663 | b_input_add( msn_file->fd, GAIM_INPUT_READ, msn_ftp_read, file ); |
---|
664 | |
---|
665 | return TRUE; |
---|
666 | } |
---|