[21167d2] | 1 | /***************************************************************************\ |
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| 2 | * * |
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| 3 | * BitlBee - An IRC to IM gateway * |
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| 4 | * Jabber module - I/O stuff (plain, SSL), queues, etc * |
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| 5 | * * |
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| 6 | * Copyright 2006 Wilmer van der Gaast <wilmer@gaast.net> * |
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| 7 | * * |
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| 8 | * This program is free software; you can redistribute it and/or modify * |
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| 9 | * it under the terms of the GNU General Public License as published by * |
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| 10 | * the Free Software Foundation; either version 2 of the License, or * |
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| 11 | * (at your option) any later version. * |
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| 12 | * * |
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| 13 | * This program is distributed in the hope that it will be useful, * |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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| 16 | * GNU General Public License for more details. * |
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| 17 | * * |
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| 18 | * You should have received a copy of the GNU General Public License along * |
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| 19 | * with this program; if not, write to the Free Software Foundation, Inc., * |
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| 20 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * |
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| 21 | * * |
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| 22 | \***************************************************************************/ |
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| 23 | |
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| 24 | #include "jabber.h" |
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| 25 | |
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| 26 | static gboolean jabber_write_callback( gpointer data, gint fd, b_input_condition cond ); |
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| 27 | |
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| 28 | int jabber_write_packet( struct gaim_connection *gc, struct xt_node *node ) |
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| 29 | { |
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| 30 | char *buf; |
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| 31 | int st; |
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| 32 | |
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| 33 | buf = xt_to_string( node ); |
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| 34 | st = jabber_write( gc, buf, strlen( buf ) ); |
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| 35 | g_free( buf ); |
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| 36 | |
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| 37 | return st; |
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| 38 | } |
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| 39 | |
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| 40 | int jabber_write( struct gaim_connection *gc, char *buf, int len ) |
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| 41 | { |
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| 42 | struct jabber_data *jd = gc->proto_data; |
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| 43 | |
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| 44 | if( jd->tx_len == 0 ) |
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| 45 | { |
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| 46 | /* If the queue is empty, allocate a new buffer. */ |
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| 47 | jd->tx_len = len; |
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| 48 | jd->txq = g_memdup( buf, len ); |
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| 49 | |
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| 50 | /* Try if we can write it immediately so we don't have to do |
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| 51 | it via the event handler. If not, add the handler. (In |
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| 52 | most cases it probably won't be necessary.) */ |
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| 53 | if( jabber_write_callback( gc, jd->fd, GAIM_INPUT_WRITE ) ) |
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| 54 | jd->w_inpa = b_input_add( jd->fd, GAIM_INPUT_WRITE, jabber_write_callback, gc ); |
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| 55 | } |
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| 56 | else |
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| 57 | { |
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| 58 | /* Just add it to the buffer if it's already filled. The |
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| 59 | event handler is already set. */ |
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| 60 | jd->txq = g_renew( char, jd->txq, jd->tx_len + len ); |
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| 61 | memcpy( jd->txq + jd->tx_len, buf, len ); |
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| 62 | jd->tx_len += len; |
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| 63 | } |
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| 64 | |
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| 65 | /* FIXME: write_callback could've generated a real error! */ |
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| 66 | return 1; |
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| 67 | } |
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| 68 | |
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| 69 | static gboolean jabber_write_callback( gpointer data, gint fd, b_input_condition cond ) |
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| 70 | { |
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| 71 | struct gaim_connection *gc = data; |
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| 72 | struct jabber_data *jd = gc->proto_data; |
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| 73 | int st; |
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| 74 | |
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| 75 | st = write( jd->fd, jd->txq, jd->tx_len ); |
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| 76 | |
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| 77 | if( st == jd->tx_len ) |
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| 78 | { |
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| 79 | /* We wrote everything, clear the buffer. */ |
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| 80 | g_free( jd->txq ); |
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| 81 | jd->txq = NULL; |
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| 82 | jd->tx_len = 0; |
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| 83 | |
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| 84 | return FALSE; |
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| 85 | } |
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| 86 | else if( st == 0 || ( st < 0 && !sockerr_again() ) ) |
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| 87 | { |
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| 88 | hide_login_progress_error( gc, "Short write() to server" ); |
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| 89 | signoff( gc ); |
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| 90 | return FALSE; |
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| 91 | } |
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| 92 | else if( st > 0 ) |
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| 93 | { |
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| 94 | char *s; |
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| 95 | |
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| 96 | s = g_memdup( jd->txq + st, jd->tx_len - st ); |
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| 97 | jd->tx_len -= st; |
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| 98 | g_free( jd->txq ); |
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| 99 | jd->txq = s; |
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| 100 | |
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| 101 | return FALSE; |
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| 102 | } |
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| 103 | else |
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| 104 | { |
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| 105 | /* Just in case we had EINPROGRESS/EAGAIN: */ |
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| 106 | |
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| 107 | return TRUE; |
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| 108 | } |
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| 109 | } |
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| 110 | |
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| 111 | static gboolean jabber_read_callback( gpointer data, gint fd, b_input_condition cond ) |
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| 112 | { |
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| 113 | struct gaim_connection *gc = data; |
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| 114 | struct jabber_data *jd = gc->proto_data; |
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| 115 | char buf[512]; |
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| 116 | int st; |
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| 117 | |
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| 118 | st = read( fd, buf, sizeof( buf ) ); |
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| 119 | |
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| 120 | if( st > 0 ) |
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| 121 | { |
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| 122 | /* Parse. */ |
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| 123 | if( !xt_feed( jd->xt, buf, st ) ) |
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| 124 | { |
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| 125 | hide_login_progress_error( gc, "XML stream error" ); |
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| 126 | signoff( gc ); |
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| 127 | return FALSE; |
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| 128 | } |
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| 129 | |
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| 130 | /* Execute all handlers. */ |
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| 131 | if( !xt_handle( jd->xt, NULL ) ) |
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| 132 | { |
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| 133 | /* Don't do anything, the handlers should have |
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| 134 | aborted the connection already... Or not? FIXME */ |
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| 135 | return FALSE; |
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| 136 | } |
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| 137 | |
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| 138 | /* Garbage collection. */ |
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| 139 | xt_cleanup( jd->xt, NULL ); |
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| 140 | |
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| 141 | /* This is a bit hackish, unfortunately. Although xmltree |
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| 142 | has nifty event handler stuff, it only calls handlers |
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| 143 | when nodes are complete. Since the server should only |
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| 144 | send an opening <stream:stream> tag, we have to check |
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| 145 | this by hand. :-( */ |
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| 146 | if( !( jd->flags & JFLAG_STREAM_STARTED ) && jd->xt && jd->xt->root ) |
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| 147 | { |
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| 148 | if( g_strcasecmp( jd->xt->root->name, "stream:stream" ) == 0 ) |
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| 149 | { |
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| 150 | jd->flags |= JFLAG_STREAM_STARTED; |
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| 151 | return jabber_start_auth( gc ); |
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| 152 | } |
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| 153 | else |
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| 154 | { |
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| 155 | hide_login_progress_error( gc, "XML stream error" ); |
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| 156 | signoff( gc ); |
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| 157 | return FALSE; |
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| 158 | } |
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| 159 | } |
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| 160 | } |
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| 161 | else if( st == 0 || ( st < 0 && !sockerr_again() ) ) |
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| 162 | { |
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| 163 | hide_login_progress_error( gc, "Error while reading from server" ); |
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| 164 | signoff( gc ); |
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| 165 | return FALSE; |
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| 166 | } |
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| 167 | |
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| 168 | /* EAGAIN/etc or a successful read. */ |
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| 169 | return TRUE; |
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| 170 | } |
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| 171 | |
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| 172 | static gboolean jabber_start_stream( struct gaim_connection *gc ); |
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| 173 | |
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| 174 | gboolean jabber_connected_plain( gpointer data, gint source, b_input_condition cond ) |
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| 175 | { |
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| 176 | struct gaim_connection *gc = data; |
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| 177 | |
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| 178 | if( source == -1 ) |
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| 179 | { |
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| 180 | hide_login_progress( gc, "Could not connect to server" ); |
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| 181 | signoff( gc ); |
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| 182 | return FALSE; |
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| 183 | } |
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| 184 | |
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| 185 | set_login_progress( gc, 1, "Connected to server, logging in" ); |
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| 186 | |
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| 187 | return jabber_start_stream( gc ); |
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| 188 | } |
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| 189 | |
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| 190 | static xt_status jabber_end_of_stream( struct xt_node *node, gpointer data ) |
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| 191 | { |
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| 192 | return XT_ABORT; |
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| 193 | } |
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| 194 | |
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| 195 | static xt_status jabber_pkt_misc( struct xt_node *node, gpointer data ) |
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| 196 | { |
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| 197 | printf( "Received unknown packet:\n" ); |
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| 198 | xt_print( node ); |
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| 199 | |
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| 200 | return XT_HANDLED; |
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| 201 | } |
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| 202 | |
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| 203 | static const struct xt_handler_entry jabber_handlers[] = { |
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| 204 | { "stream:stream", "<root>", jabber_end_of_stream }, |
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| 205 | { "iq", "stream:stream", jabber_pkt_iq }, |
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| 206 | { "message", "stream:stream", jabber_pkt_message }, |
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| 207 | { "presence", "stream:stream", jabber_pkt_presence }, |
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| 208 | { NULL, "stream:stream", jabber_pkt_misc }, |
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| 209 | { NULL, NULL, NULL } |
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| 210 | }; |
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| 211 | |
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| 212 | static gboolean jabber_start_stream( struct gaim_connection *gc ) |
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| 213 | { |
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| 214 | struct jabber_data *jd = gc->proto_data; |
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| 215 | int st; |
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| 216 | char *greet; |
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| 217 | |
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| 218 | /* We'll start our stream now, so prepare everything to receive one |
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| 219 | from the server too. */ |
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| 220 | xt_free( jd->xt ); /* In case we're RE-starting. */ |
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| 221 | jd->xt = xt_new( gc ); |
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| 222 | jd->xt->handlers = (struct xt_handler_entry*) jabber_handlers; |
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| 223 | |
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| 224 | jd->r_inpa = b_input_add( jd->fd, GAIM_INPUT_READ, jabber_read_callback, gc ); |
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| 225 | |
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| 226 | greet = g_strdup_printf( "<?xml version='1.0' ?>" |
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| 227 | "<stream:stream to=\"%s\" xmlns=\"jabber:client\" " |
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| 228 | "xmlns:stream=\"http://etherx.jabber.org/streams\">", jd->server ); |
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| 229 | /* Add this when TLS and SASL are supported? */ |
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| 230 | // version=\"1.0\">" |
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| 231 | |
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| 232 | st = jabber_write( gc, greet, strlen( greet ) ); |
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| 233 | |
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| 234 | g_free( greet ); |
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| 235 | |
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| 236 | return st; |
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| 237 | } |
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