[a2b99ec] | 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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[a02f34f] | 30 | #include "lib/ftutil.h" |
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[66be784] | 31 | |
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[a2b99ec] | 32 | #ifdef debug |
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| 33 | #undef debug |
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| 34 | #endif |
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| 35 | #define debug(msg...) log_message( LOGLVL_INFO, msg ) |
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| 36 | |
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| 37 | static void msn_ftp_free( file_transfer_t *file ); |
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| 38 | static void msn_ftpr_accept( file_transfer_t *file ); |
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| 39 | static void msn_ftp_finished( file_transfer_t *file ); |
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| 40 | static void msn_ftp_canceled( file_transfer_t *file, char *reason ); |
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| 41 | static gboolean msn_ftpr_write_request( file_transfer_t *file ); |
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| 42 | |
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| 43 | static gboolean msn_ftp_connected( gpointer data, gint fd, b_input_condition cond ); |
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| 44 | static gboolean msn_ftp_read( gpointer data, gint fd, b_input_condition cond ); |
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| 45 | gboolean msn_ftps_write( file_transfer_t *file, char *buffer, unsigned int len ); |
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| 46 | |
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| 47 | /* |
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| 48 | * Vararg wrapper for imcb_file_canceled(). |
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| 49 | */ |
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| 50 | gboolean msn_ftp_abort( file_transfer_t *file, char *format, ... ) |
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| 51 | { |
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| 52 | va_list params; |
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| 53 | va_start( params, format ); |
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| 54 | char error[128]; |
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| 55 | |
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| 56 | if( vsnprintf( error, 128, format, params ) < 0 ) |
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| 57 | sprintf( error, "internal error parsing error string (BUG)" ); |
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| 58 | va_end( params ); |
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| 59 | imcb_file_canceled( file, error ); |
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| 60 | return FALSE; |
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| 61 | } |
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| 62 | |
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| 63 | /* very useful */ |
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| 64 | #define ASSERTSOCKOP(op, msg) \ |
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| 65 | if( (op) == -1 ) \ |
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| 66 | return msn_ftp_abort( file , msg ": %s", strerror( errno ) ); |
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| 67 | |
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| 68 | void msn_ftp_invitation_cmd( struct im_connection *ic, char *who, int cookie, char *icmd, |
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| 69 | char *trailer ) |
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| 70 | { |
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| 71 | struct msn_message *m = g_new0( struct msn_message, 1 ); |
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| 72 | |
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| 73 | m->text = g_strdup_printf( "%s" |
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| 74 | "Invitation-Command: %s\r\n" |
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| 75 | "Invitation-Cookie: %u\r\n" |
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| 76 | "%s", |
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| 77 | MSN_INVITE_HEADERS, |
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| 78 | icmd, |
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| 79 | cookie, |
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| 80 | trailer); |
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| 81 | |
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| 82 | m->who = g_strdup( who ); |
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| 83 | |
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| 84 | msn_sb_write_msg( ic, m ); |
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| 85 | } |
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| 86 | |
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| 87 | void msn_ftp_cancel_invite( struct im_connection *ic, char *who, int cookie, char *code ) |
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| 88 | { |
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| 89 | char buf[64]; |
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| 90 | |
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| 91 | g_snprintf( buf, sizeof( buf ), "Cancel-Code: %s\r\n", code ); |
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| 92 | msn_ftp_invitation_cmd( ic, who, cookie, "CANCEL", buf ); |
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| 93 | } |
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| 94 | |
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| 95 | void msn_ftp_transfer_request( struct im_connection *ic, file_transfer_t *file, char *who ) |
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| 96 | { |
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| 97 | unsigned int cookie = time( NULL ); /* TODO: randomize */ |
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| 98 | char buf[2048]; |
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| 99 | |
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| 100 | msn_filetransfer_t *msn_file = g_new0( msn_filetransfer_t, 1 ); |
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| 101 | file->data = msn_file; |
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| 102 | file->free = msn_ftp_free; |
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| 103 | file->canceled = msn_ftp_canceled; |
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| 104 | file->write = msn_ftps_write; |
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| 105 | msn_file->md = ic->proto_data; |
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| 106 | msn_file->invite_cookie = cookie; |
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| 107 | msn_file->handle = g_strdup( who ); |
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| 108 | msn_file->dcc = file; |
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| 109 | msn_file->md->filetransfers = g_slist_prepend( msn_file->md->filetransfers, msn_file->dcc ); |
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| 110 | msn_file->fd = -1; |
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| 111 | msn_file->sbufpos = 3; |
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| 112 | |
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| 113 | g_snprintf( buf, sizeof( buf ), |
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| 114 | "Application-Name: File Transfer\r\n" |
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| 115 | "Application-GUID: {5D3E02AB-6190-11d3-BBBB-00C04F795683}\r\n" |
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| 116 | "Application-File: %s\r\n" |
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| 117 | "Application-FileSize: %zd\r\n", |
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| 118 | file->file_name, |
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| 119 | file->file_size); |
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| 120 | |
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| 121 | msn_ftp_invitation_cmd( msn_file->md->ic, msn_file->handle, cookie, "INVITE", buf ); |
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| 122 | |
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| 123 | imcb_file_recv_start( file ); |
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| 124 | } |
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| 125 | |
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| 126 | void msn_invitation_invite( struct msn_switchboard *sb, char *handle, unsigned int cookie, char *body, int blen ) |
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| 127 | { |
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| 128 | char *itype = msn_findheader( body, "Application-GUID:", blen ); |
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| 129 | char *name, *size, *invitecookie, *reject = NULL; |
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| 130 | user_t *u; |
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| 131 | size_t isize; |
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| 132 | file_transfer_t *file; |
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| 133 | |
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| 134 | if( !itype || strcmp( itype, "{5D3E02AB-6190-11d3-BBBB-00C04F795683}" ) != 0 ) { |
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| 135 | /* Don't know what that is - don't care */ |
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| 136 | char *iname = msn_findheader( body, "Application-Name:", blen ); |
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| 137 | imcb_log( sb->ic, "Received unknown MSN invitation %s (%s) from %s", |
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| 138 | itype ? : "with no GUID", iname ? iname : "no application name", handle ); |
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| 139 | g_free( iname ); |
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| 140 | reject = "REJECT_NOT_INSTALLED"; |
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| 141 | } else if ( |
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| 142 | !( name = msn_findheader( body, "Application-File:", blen )) || |
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| 143 | !( size = msn_findheader( body, "Application-FileSize:", blen )) || |
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| 144 | !( invitecookie = msn_findheader( body, "Invitation-Cookie:", blen)) || |
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| 145 | !( isize = atoll( size ) ) ) { |
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| 146 | imcb_log( sb->ic, "Received corrupted transfer request from %s" |
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| 147 | "(name=%s, size=%s, invitecookie=%s)", |
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| 148 | handle, name, size, invitecookie ); |
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| 149 | reject = "REJECT"; |
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| 150 | } else if ( !( u = user_findhandle( sb->ic, handle ) ) ) { |
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| 151 | imcb_log( sb->ic, "Error in parsing transfer request, User '%s'" |
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| 152 | "is not in contact list", handle ); |
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| 153 | reject = "REJECT"; |
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| 154 | } else if ( !( file = imcb_file_send_start( sb->ic, handle, name, isize ) ) ) { |
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| 155 | imcb_log( sb->ic, "Error initiating transfer for request from %s for %s", |
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| 156 | handle, name ); |
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| 157 | reject = "REJECT"; |
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| 158 | } else { |
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| 159 | msn_filetransfer_t *msn_file = g_new0( msn_filetransfer_t, 1 ); |
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| 160 | file->data = msn_file; |
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| 161 | file->accept = msn_ftpr_accept; |
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| 162 | file->free = msn_ftp_free; |
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| 163 | file->finished = msn_ftp_finished; |
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| 164 | file->canceled = msn_ftp_canceled; |
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| 165 | file->write_request = msn_ftpr_write_request; |
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| 166 | msn_file->md = sb->ic->proto_data; |
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| 167 | msn_file->invite_cookie = cookie; |
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| 168 | msn_file->handle = g_strdup( handle ); |
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| 169 | msn_file->dcc = file; |
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| 170 | msn_file->md->filetransfers = g_slist_prepend( msn_file->md->filetransfers, msn_file->dcc ); |
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| 171 | msn_file->fd = -1; |
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| 172 | } |
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| 173 | |
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| 174 | if( reject ) |
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| 175 | msn_ftp_cancel_invite( sb->ic, sb->who, cookie, reject ); |
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| 176 | |
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| 177 | g_free( name ); |
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| 178 | g_free( size ); |
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| 179 | g_free( invitecookie ); |
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| 180 | g_free( itype ); |
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| 181 | } |
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| 182 | |
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| 183 | msn_filetransfer_t* msn_find_filetransfer( struct msn_data *md, unsigned int cookie, char *handle ) |
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| 184 | { |
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| 185 | GSList *l; |
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| 186 | |
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| 187 | for( l = md->filetransfers; l; l = l->next ) { |
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| 188 | msn_filetransfer_t *file = ( (file_transfer_t*) l->data )->data; |
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| 189 | if( file->invite_cookie == cookie && strcmp( handle, file->handle ) == 0 ) { |
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| 190 | return file; |
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| 191 | } |
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| 192 | } |
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| 193 | return NULL; |
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| 194 | } |
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| 195 | |
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| 196 | gboolean msn_ftps_connected( gpointer data, gint fd, b_input_condition cond ) |
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| 197 | { |
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| 198 | file_transfer_t *file = data; |
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| 199 | msn_filetransfer_t *msn_file = file->data; |
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| 200 | struct sockaddr_storage clt_addr; |
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| 201 | socklen_t ssize = sizeof( clt_addr ); |
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| 202 | |
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| 203 | debug( "Connected to MSNFTP client" ); |
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| 204 | |
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| 205 | ASSERTSOCKOP( msn_file->fd = accept( fd, (struct sockaddr *) &clt_addr, &ssize ), "Accepting connection" ); |
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| 206 | |
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| 207 | closesocket( fd ); |
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| 208 | fd = msn_file->fd; |
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| 209 | sock_make_nonblocking( fd ); |
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| 210 | |
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| 211 | msn_file->r_event_id = b_input_add( fd, GAIM_INPUT_READ, msn_ftp_read, file ); |
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| 212 | |
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| 213 | return FALSE; |
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| 214 | } |
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| 215 | |
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| 216 | 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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| 217 | { |
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| 218 | file_transfer_t *file = msn_file->dcc; |
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| 219 | char buf[1024]; |
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| 220 | unsigned int acookie = time ( NULL ); |
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[60e4df3] | 221 | char host[HOST_NAME_MAX+1]; |
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[a2b99ec] | 222 | char port[6]; |
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[a02f34f] | 223 | char *errmsg; |
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[a2b99ec] | 224 | |
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| 225 | msn_file->auth_cookie = acookie; |
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| 226 | |
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[a02f34f] | 227 | if( ( msn_file->fd = ft_listen( NULL, host, port, FALSE, &errmsg ) ) == -1 ) { |
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| 228 | msn_ftp_abort( file, "Failed to listen locally, check your ft_listen setting in bitlbee.conf: %s", errmsg ); |
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| 229 | return; |
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| 230 | } |
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[a2b99ec] | 231 | |
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| 232 | msn_file->r_event_id = b_input_add( msn_file->fd, GAIM_INPUT_READ, msn_ftps_connected, file ); |
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| 233 | |
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| 234 | g_snprintf( buf, sizeof( buf ), |
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| 235 | "IP-Address: %s\r\n" |
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| 236 | "Port: %s\r\n" |
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| 237 | "AuthCookie: %d\r\n" |
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| 238 | "Launch-Application: FALSE\r\n" |
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| 239 | "Request-Data: IP-Address:\r\n\r\n", |
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| 240 | host, |
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| 241 | port, |
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| 242 | msn_file->auth_cookie ); |
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| 243 | |
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| 244 | msn_ftp_invitation_cmd( msn_file->md->ic, handle, msn_file->invite_cookie, "ACCEPT", buf ); |
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| 245 | } |
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| 246 | |
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| 247 | 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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| 248 | file_transfer_t *file = msn_file->dcc; |
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| 249 | char *authcookie, *ip, *port; |
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| 250 | |
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| 251 | if( !( authcookie = msn_findheader( body, "AuthCookie:", blen ) ) || |
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| 252 | !( ip = msn_findheader( body, "IP-Address:", blen ) ) || |
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| 253 | !( port = msn_findheader( body, "Port:", blen ) ) ) { |
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| 254 | msn_ftp_abort( file, "Received invalid accept reply" ); |
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| 255 | } else if( |
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| 256 | ( msn_file->fd = proxy_connect( ip, atoi( port ), msn_ftp_connected, file ) ) |
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| 257 | < 0 ) { |
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| 258 | msn_ftp_abort( file, "Error connecting to MSN client" ); |
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| 259 | } else |
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| 260 | msn_file->auth_cookie = strtoul( authcookie, NULL, 10 ); |
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| 261 | |
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| 262 | g_free( authcookie ); |
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| 263 | g_free( ip ); |
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| 264 | g_free( port ); |
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| 265 | } |
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| 266 | |
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| 267 | void msn_invitation_accept( struct msn_switchboard *sb, char *handle, unsigned int cookie, char *body, int blen ) |
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| 268 | { |
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| 269 | msn_filetransfer_t *msn_file = msn_find_filetransfer( sb->ic->proto_data, cookie, handle ); |
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| 270 | file_transfer_t *file = msn_file ? msn_file->dcc : NULL; |
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| 271 | |
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| 272 | if( !msn_file ) |
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| 273 | imcb_log( sb->ic, "Received invitation ACCEPT message for unknown invitation (already aborted?)" ); |
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| 274 | else if( file->sending ) |
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| 275 | msn_invitations_accept( msn_file, sb, handle, cookie, body, blen ); |
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| 276 | else |
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| 277 | msn_invitationr_accept( msn_file, sb, handle, cookie, body, blen ); |
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| 278 | } |
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| 279 | |
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| 280 | void msn_invitation_cancel( struct msn_switchboard *sb, char *handle, unsigned int cookie, char *body, int blen ) |
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| 281 | { |
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| 282 | msn_filetransfer_t *msn_file = msn_find_filetransfer( sb->ic->proto_data, cookie, handle ); |
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| 283 | |
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| 284 | if( !msn_file ) |
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| 285 | imcb_log( sb->ic, "Received invitation CANCEL message for unknown invitation (already aborted?)" ); |
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| 286 | else |
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| 287 | msn_ftp_abort( msn_file->dcc, msn_findheader( body, "Cancel-Code:", blen ) ); |
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| 288 | } |
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| 289 | |
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| 290 | int msn_ftp_write( file_transfer_t *file, char *format, ... ) |
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| 291 | { |
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| 292 | msn_filetransfer_t *msn_file = file->data; |
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| 293 | va_list params; |
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| 294 | int st; |
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| 295 | char *s; |
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| 296 | |
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| 297 | va_start( params, format ); |
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| 298 | s = g_strdup_vprintf( format, params ); |
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| 299 | va_end( params ); |
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| 300 | |
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| 301 | st = write( msn_file->fd, s, strlen( s ) ); |
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| 302 | if( st != strlen( s ) ) |
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| 303 | return msn_ftp_abort( file, "Error sending data over MSNFTP connection: %s", |
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| 304 | strerror( errno ) ); |
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| 305 | |
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| 306 | g_free( s ); |
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| 307 | return 1; |
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| 308 | } |
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| 309 | |
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| 310 | gboolean msn_ftp_connected( gpointer data, gint fd, b_input_condition cond ) |
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| 311 | { |
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| 312 | file_transfer_t *file = data; |
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| 313 | msn_filetransfer_t *msn_file = file->data; |
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| 314 | |
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| 315 | debug( "Connected to MSNFTP server, starting authentication" ); |
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| 316 | if( !msn_ftp_write( file, "VER MSNFTP\r\n" ) ) |
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| 317 | return FALSE; |
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| 318 | |
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| 319 | sock_make_nonblocking( msn_file->fd ); |
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| 320 | msn_file->r_event_id = b_input_add( msn_file->fd, GAIM_INPUT_READ, msn_ftp_read, file ); |
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| 321 | |
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| 322 | return FALSE; |
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| 323 | } |
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| 324 | |
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| 325 | gboolean msn_ftp_handle_command( file_transfer_t *file, char* line ) |
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| 326 | { |
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| 327 | msn_filetransfer_t *msn_file = file->data; |
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| 328 | char **cmd = msn_linesplit( line ); |
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| 329 | int count = 0; |
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| 330 | if( cmd[0] ) while( cmd[++count] ); |
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| 331 | |
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| 332 | if( count < 1 ) |
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| 333 | return msn_ftp_abort( file, "Missing command in MSNFTP communication" ); |
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| 334 | |
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| 335 | if( strcmp( cmd[0], "VER" ) == 0 ) { |
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| 336 | if( strcmp( cmd[1], "MSNFTP" ) != 0 ) |
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| 337 | return msn_ftp_abort( file, "Unsupported filetransfer protocol: %s", cmd[1] ); |
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| 338 | if( file->sending ) |
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| 339 | msn_ftp_write( file, "VER MSNFTP\r\n" ); |
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| 340 | else |
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| 341 | msn_ftp_write( file, "USR %s %u\r\n", msn_file->md->ic->acc->user, msn_file->auth_cookie ); |
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| 342 | } else if( strcmp( cmd[0], "FIL" ) == 0 ) { |
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| 343 | if( strtoul( cmd[1], NULL, 10 ) != file->file_size ) |
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| 344 | return msn_ftp_abort( file, "FIL reply contains a different file size than the size in the invitation" ); |
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| 345 | msn_ftp_write( file, "TFR\r\n" ); |
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| 346 | msn_file->status |= MSN_TRANSFER_RECEIVING; |
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| 347 | } else if( strcmp( cmd[0], "USR" ) == 0 ) { |
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| 348 | if( ( strcmp( cmd[1], msn_file->handle ) != 0 ) || |
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| 349 | ( strtoul( cmd[2], NULL, 10 ) != msn_file->auth_cookie ) ) |
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| 350 | msn_ftp_abort( file, "Authentication failed. " |
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| 351 | "Expected handle: %s (got %s), cookie: %u (got %s)", |
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| 352 | msn_file->handle, cmd[1], |
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| 353 | msn_file->auth_cookie, cmd[2] ); |
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| 354 | msn_ftp_write( file, "FIL %zu\r\n", file->file_size); |
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| 355 | } else if( strcmp( cmd[0], "TFR" ) == 0 ) { |
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| 356 | file->write_request( file ); |
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| 357 | } else if( strcmp( cmd[0], "BYE" ) == 0 ) { |
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| 358 | unsigned int retcode = count > 1 ? atoi(cmd[1]) : 1; |
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| 359 | |
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| 360 | if( ( retcode==16777989 ) || ( retcode==16777987 ) ) |
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| 361 | imcb_file_finished( file ); |
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| 362 | else if( retcode==2147942405 ) |
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| 363 | imcb_file_canceled( file, "Failure: receiver is out of disk space" ); |
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| 364 | else if( retcode==2164261682 ) |
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| 365 | imcb_file_canceled( file, "Failure: receiver cancelled the transfer" ); |
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| 366 | else if( retcode==2164261683 ) |
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| 367 | imcb_file_canceled( file, "Failure: sender has cancelled the transfer" ); |
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| 368 | else if( retcode==2164261694 ) |
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| 369 | imcb_file_canceled( file, "Failure: connection is blocked" ); |
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| 370 | else { |
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| 371 | char buf[128]; |
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| 372 | |
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| 373 | sprintf( buf, "Failure: unknown BYE code: %d", retcode); |
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| 374 | imcb_file_canceled( file, buf ); |
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| 375 | } |
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| 376 | } else if( strcmp( cmd[0], "CCL" ) == 0 ) { |
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| 377 | imcb_file_canceled( file, "Failure: receiver cancelled the transfer" ); |
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| 378 | } else { |
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| 379 | msn_ftp_abort( file, "Received invalid command %s from msn client", cmd[0] ); |
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| 380 | } |
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| 381 | return TRUE; |
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| 382 | } |
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| 383 | |
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| 384 | gboolean msn_ftp_send( gpointer data, gint fd, b_input_condition cond ) |
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| 385 | { |
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| 386 | file_transfer_t *file = data; |
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| 387 | msn_filetransfer_t *msn_file = file->data; |
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| 388 | |
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| 389 | msn_file->w_event_id = 0; |
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| 390 | |
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| 391 | file->write_request( file ); |
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| 392 | |
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| 393 | return FALSE; |
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| 394 | } |
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| 395 | |
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| 396 | /* |
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| 397 | * This should only be called if we can write, so just do it. |
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| 398 | * Add a write watch so we can write more during the next cycle (if possible). |
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| 399 | * This got a bit complicated because (at least) amsn expects packets of size 2045. |
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| 400 | */ |
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| 401 | gboolean msn_ftps_write( file_transfer_t *file, char *buffer, unsigned int len ) |
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| 402 | { |
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| 403 | msn_filetransfer_t *msn_file = file->data; |
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| 404 | int ret, overflow; |
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| 405 | |
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| 406 | /* what we can't send now */ |
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| 407 | overflow = msn_file->sbufpos + len - MSNFTP_PSIZE; |
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| 408 | |
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| 409 | /* append what we can do the send buffer */ |
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| 410 | memcpy( msn_file->sbuf + msn_file->sbufpos, buffer, MIN( len, MSNFTP_PSIZE - msn_file->sbufpos ) ); |
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| 411 | msn_file->sbufpos += MIN( len, MSNFTP_PSIZE - msn_file->sbufpos ); |
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| 412 | |
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| 413 | /* if we don't have enough for a full packet and there's more wait for it */ |
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| 414 | if( ( msn_file->sbufpos < MSNFTP_PSIZE ) && |
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| 415 | ( msn_file->data_sent + msn_file->sbufpos - 3 < file->file_size ) ) { |
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| 416 | if( !msn_file->w_event_id ) |
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| 417 | msn_file->w_event_id = b_input_add( msn_file->fd, GAIM_INPUT_WRITE, msn_ftp_send, file ); |
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| 418 | return TRUE; |
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| 419 | } |
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| 420 | |
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| 421 | /* Accumulated enough data, lets send something out */ |
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| 422 | |
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| 423 | msn_file->sbuf[0] = 0; |
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| 424 | msn_file->sbuf[1] = ( msn_file->sbufpos - 3 ) & 0xff; |
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| 425 | msn_file->sbuf[2] = ( ( msn_file->sbufpos - 3 ) >> 8 ) & 0xff; |
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| 426 | |
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| 427 | ASSERTSOCKOP( ret = send( msn_file->fd, msn_file->sbuf, msn_file->sbufpos, 0 ), "Sending" ); |
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| 428 | |
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| 429 | msn_file->data_sent += ret - 3; |
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| 430 | |
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| 431 | /* TODO: this should really not be fatal */ |
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| 432 | if( ret < msn_file->sbufpos ) |
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| 433 | return msn_ftp_abort( file, "send() sent %d instead of %d (send buffer full!)", ret, msn_file->sbufpos ); |
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| 434 | |
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| 435 | msn_file->sbufpos = 3; |
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| 436 | |
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| 437 | if( overflow > 0 ) { |
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| 438 | while( overflow > ( MSNFTP_PSIZE - 3 ) ) { |
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| 439 | if( !msn_ftps_write( file, buffer + len - overflow, MSNFTP_PSIZE - 3 ) ) |
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| 440 | return FALSE; |
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| 441 | overflow -= MSNFTP_PSIZE - 3; |
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| 442 | } |
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| 443 | return msn_ftps_write( file, buffer + len - overflow, overflow ); |
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| 444 | } |
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| 445 | |
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| 446 | if( msn_file->data_sent == file->file_size ) { |
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| 447 | if( msn_file->w_event_id ) { |
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| 448 | b_event_remove( msn_file->w_event_id ); |
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| 449 | msn_file->w_event_id = 0; |
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| 450 | } |
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| 451 | } else { |
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| 452 | /* we might already be listening if this is data from an overflow */ |
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| 453 | if( !msn_file->w_event_id ) |
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| 454 | msn_file->w_event_id = b_input_add( msn_file->fd, GAIM_INPUT_WRITE, msn_ftp_send, file ); |
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| 455 | } |
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| 456 | |
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| 457 | return TRUE; |
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| 458 | } |
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| 459 | |
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| 460 | /* Binary part of the file transfer protocol */ |
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| 461 | gboolean msn_ftpr_read( file_transfer_t *file ) |
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| 462 | { |
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| 463 | msn_filetransfer_t *msn_file = file->data; |
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| 464 | int st; |
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| 465 | unsigned char buf[3]; |
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| 466 | |
---|
| 467 | if( msn_file->data_remaining ) { |
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| 468 | msn_file->r_event_id = 0; |
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| 469 | |
---|
| 470 | ASSERTSOCKOP( st = read( msn_file->fd, file->buffer, MIN( sizeof( file->buffer ), msn_file->data_remaining ) ), "Receiving" ); |
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| 471 | |
---|
| 472 | if( st == 0 ) |
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| 473 | return msn_ftp_abort( file, "Remote end closed connection"); |
---|
| 474 | |
---|
| 475 | msn_file->data_sent += st; |
---|
| 476 | |
---|
| 477 | msn_file->data_remaining -= st; |
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| 478 | |
---|
| 479 | file->write( file, file->buffer, st ); |
---|
| 480 | |
---|
| 481 | if( msn_file->data_sent >= file->file_size ) |
---|
| 482 | imcb_file_finished( file ); |
---|
| 483 | |
---|
| 484 | return FALSE; |
---|
| 485 | } else { |
---|
| 486 | ASSERTSOCKOP( st = read( msn_file->fd, buf, 1 ), "Receiving" ); |
---|
| 487 | if( st == 0 ) { |
---|
| 488 | return msn_ftp_abort( file, "read returned EOF while reading data header from msn client" ); |
---|
| 489 | } else if( buf[0] == '\r' || buf[0] == '\n' ) { |
---|
| 490 | debug( "Discarding extraneous newline" ); |
---|
| 491 | } else if( buf[0] != 0 ) { |
---|
| 492 | msn_ftp_abort( file, "Remote end canceled the transfer"); |
---|
| 493 | /* don't really care about these last 2 (should be 0,0) */ |
---|
| 494 | read( msn_file->fd, buf, 2 ); |
---|
| 495 | return FALSE; |
---|
| 496 | } else { |
---|
| 497 | unsigned int size; |
---|
| 498 | ASSERTSOCKOP( st = read( msn_file->fd, buf, 2 ), "Receiving" ); |
---|
| 499 | if( st < 2 ) |
---|
| 500 | return msn_ftp_abort( file, "read returned EOF while reading data header from msn client" ); |
---|
| 501 | |
---|
| 502 | size = buf[0] + ((unsigned int) buf[1] << 8); |
---|
| 503 | msn_file->data_remaining = size; |
---|
| 504 | } |
---|
| 505 | } |
---|
| 506 | return TRUE; |
---|
| 507 | } |
---|
| 508 | |
---|
| 509 | /* Text mode part of the file transfer protocol */ |
---|
| 510 | gboolean msn_ftp_txtproto( file_transfer_t *file ) |
---|
| 511 | { |
---|
| 512 | msn_filetransfer_t *msn_file = file->data; |
---|
| 513 | int i = msn_file->tbufpos, st; |
---|
| 514 | char *tbuf = msn_file->tbuf; |
---|
| 515 | |
---|
| 516 | ASSERTSOCKOP( st = read( msn_file->fd, |
---|
| 517 | tbuf + msn_file->tbufpos, |
---|
| 518 | sizeof( msn_file->tbuf ) - msn_file->tbufpos ), |
---|
| 519 | "Receiving" ); |
---|
| 520 | |
---|
| 521 | if( st == 0 ) |
---|
| 522 | return msn_ftp_abort( file, "read returned EOF while reading text from msn client" ); |
---|
| 523 | |
---|
| 524 | msn_file->tbufpos += st; |
---|
| 525 | |
---|
| 526 | do { |
---|
| 527 | for( ;i < msn_file->tbufpos; i++ ) { |
---|
| 528 | if( tbuf[i] == '\n' || tbuf[i] == '\r' ) { |
---|
| 529 | tbuf[i] = '\0'; |
---|
| 530 | if( i > 0 ) |
---|
| 531 | msn_ftp_handle_command( file, tbuf ); |
---|
| 532 | else |
---|
| 533 | while( tbuf[i] == '\n' || tbuf[i] == '\r' ) i++; |
---|
| 534 | memmove( tbuf, tbuf + i + 1, msn_file->tbufpos - i - 1 ); |
---|
| 535 | msn_file->tbufpos -= i + 1; |
---|
| 536 | i = 0; |
---|
| 537 | break; |
---|
| 538 | } |
---|
| 539 | } |
---|
| 540 | } while ( i < msn_file->tbufpos ); |
---|
| 541 | |
---|
| 542 | if( msn_file->tbufpos == sizeof( msn_file->tbuf ) ) |
---|
| 543 | return msn_ftp_abort( file, |
---|
| 544 | "Line exceeded %d bytes in text protocol", |
---|
| 545 | sizeof( msn_file->tbuf ) ); |
---|
| 546 | return TRUE; |
---|
| 547 | } |
---|
| 548 | |
---|
| 549 | gboolean msn_ftp_read( gpointer data, gint fd, b_input_condition cond ) |
---|
| 550 | { |
---|
| 551 | file_transfer_t *file = data; |
---|
| 552 | msn_filetransfer_t *msn_file = file->data; |
---|
| 553 | |
---|
| 554 | if( msn_file->status & MSN_TRANSFER_RECEIVING ) |
---|
| 555 | return msn_ftpr_read( file ); |
---|
| 556 | else |
---|
| 557 | return msn_ftp_txtproto( file ); |
---|
| 558 | } |
---|
| 559 | |
---|
| 560 | void msn_ftp_free( file_transfer_t *file ) |
---|
| 561 | { |
---|
| 562 | msn_filetransfer_t *msn_file = file->data; |
---|
| 563 | |
---|
| 564 | if( msn_file->r_event_id ) |
---|
| 565 | b_event_remove( msn_file->r_event_id ); |
---|
| 566 | |
---|
| 567 | if( msn_file->w_event_id ) |
---|
| 568 | b_event_remove( msn_file->w_event_id ); |
---|
| 569 | |
---|
| 570 | if( msn_file->fd != -1 ) |
---|
| 571 | closesocket( msn_file->fd ); |
---|
| 572 | |
---|
| 573 | msn_file->md->filetransfers = g_slist_remove( msn_file->md->filetransfers, msn_file->dcc ); |
---|
| 574 | |
---|
| 575 | g_free( msn_file->handle ); |
---|
| 576 | |
---|
| 577 | g_free( msn_file ); |
---|
| 578 | } |
---|
| 579 | |
---|
| 580 | void msn_ftpr_accept( file_transfer_t *file ) |
---|
| 581 | { |
---|
| 582 | msn_filetransfer_t *msn_file = file->data; |
---|
| 583 | |
---|
| 584 | msn_ftp_invitation_cmd( msn_file->md->ic, msn_file->handle, msn_file->invite_cookie, "ACCEPT", |
---|
| 585 | "Launch-Application: FALSE\r\n" |
---|
| 586 | "Request-Data: IP-Address:\r\n"); |
---|
| 587 | } |
---|
| 588 | |
---|
| 589 | void msn_ftp_finished( file_transfer_t *file ) |
---|
| 590 | { |
---|
| 591 | msn_ftp_write( file, "BYE 16777989\r\n" ); |
---|
| 592 | } |
---|
| 593 | |
---|
| 594 | void msn_ftp_canceled( file_transfer_t *file, char *reason ) |
---|
| 595 | { |
---|
| 596 | msn_filetransfer_t *msn_file = file->data; |
---|
| 597 | |
---|
| 598 | msn_ftp_cancel_invite( msn_file->md->ic, msn_file->handle, |
---|
| 599 | msn_file->invite_cookie, |
---|
| 600 | file->status & FT_STATUS_TRANSFERRING ? |
---|
| 601 | "FTTIMEOUT" : |
---|
| 602 | "FAIL" ); |
---|
| 603 | |
---|
| 604 | imcb_log( msn_file->md->ic, "File transfer aborted: %s", reason ); |
---|
| 605 | } |
---|
| 606 | |
---|
| 607 | gboolean msn_ftpr_write_request( file_transfer_t *file ) |
---|
| 608 | { |
---|
| 609 | msn_filetransfer_t *msn_file = file->data; |
---|
| 610 | if( msn_file->r_event_id != 0 ) { |
---|
| 611 | msn_ftp_abort( file, |
---|
| 612 | "BUG in MSN file transfer:" |
---|
| 613 | "write_request called when" |
---|
| 614 | "already watching for input" ); |
---|
| 615 | return FALSE; |
---|
| 616 | } |
---|
| 617 | |
---|
| 618 | msn_file->r_event_id = |
---|
| 619 | b_input_add( msn_file->fd, GAIM_INPUT_READ, msn_ftp_read, file ); |
---|
| 620 | |
---|
| 621 | return TRUE; |
---|
| 622 | } |
---|