source: protocols/jabber/jabber.c @ 36e9f62

/***************************************************************************\
*                                                                           *
*  BitlBee - An IRC to IM gateway                                           *
*  Jabber module - Main file                                                *
*                                                                           *
*  Copyright 2006 Wilmer van der Gaast <wilmer@gaast.net>                   *
*                                                                           *
*  This program is free software; you can redistribute it and/or modify     *
*  it under the terms of the GNU General Public License as published by     *
*  the Free Software Foundation; either version 2 of the License, or        *
*  (at your option) any later version.                                      *
*                                                                           *
*  This program is distributed in the hope that it will be useful,          *
*  but WITHOUT ANY WARRANTY; without even the implied warranty of           *
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            *
*  GNU General Public License for more details.                             *
*                                                                           *
*  You should have received a copy of the GNU General Public License along  *
*  with this program; if not, write to the Free Software Foundation, Inc.,  *
*  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.              *
*                                                                           *
\***************************************************************************/

#include <glib.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <stdio.h>

#include "ssl_client.h"
#include "xmltree.h"
#include "bitlbee.h"
#include "jabber.h"

static void jabber_acc_init( account_t *acc )
{
        set_t *s;
        
        s = set_add( &acc->set, "port", "5222", set_eval_int, acc );
        s->flags |= ACC_SET_OFFLINE_ONLY;
        
        s = set_add( &acc->set, "priority", "0", set_eval_priority, acc );
        
        s = set_add( &acc->set, "resource", "BitlBee", NULL, acc );
        s->flags |= ACC_SET_OFFLINE_ONLY;
        
        s = set_add( &acc->set, "server", NULL, set_eval_account, acc );
        s->flags |= ACC_SET_NOSAVE | ACC_SET_OFFLINE_ONLY;
        
        s = set_add( &acc->set, "ssl", "false", set_eval_bool, acc );
        s->flags |= ACC_SET_OFFLINE_ONLY;
        
        s = set_add( &acc->set, "tls", "try", set_eval_tls, acc );
        s->flags |= ACC_SET_OFFLINE_ONLY;
}

static void jabber_login( account_t *acc )
{
        struct gaim_connection *gc = new_gaim_conn( acc );
        struct jabber_data *jd = g_new0( struct jabber_data, 1 );
        struct ns_srv_reply *srv = NULL;
        char *connect_to;
        
        jd->gc = gc;
        gc->proto_data = jd;
        
        jd->username = g_strdup( acc->user );
        jd->server = strchr( jd->username, '@' );
        
        if( jd->server == NULL )
        {
                hide_login_progress( gc, "Incomplete account name (format it like <username@jabberserver.name>)" );
                signoff( gc );
                return;
        }
        
        /* So don't think of free()ing jd->server.. :-) */
        *jd->server = 0;
        jd->server ++;
        
        jd->node_cache = xt_new_node( "cache", NULL, NULL );
        
        /* Figure out the hostname to connect to. */
        if( acc->server )
                connect_to = acc->server;
        else if( ( srv = srv_lookup( "xmpp-client", "tcp", jd->server ) ) ||
                 ( srv = srv_lookup( "jabber-client", "tcp", jd->server ) ) )
                connect_to = srv->name;
        else
                connect_to = jd->server;
        
        /* For non-SSL connections we can try to use the port # from the SRV
           reply, but let's not do that when using SSL, SSL usually runs on
           non-standard ports... */
        if( set_getbool( &acc->set, "ssl" ) )
        {
                jd->ssl = ssl_connect( connect_to, set_getint( &acc->set, "port" ), jabber_connected_ssl, gc );
                jd->fd = ssl_getfd( jd->ssl );
        }
        else
        {
                jd->fd = proxy_connect( connect_to, srv ? srv->port : set_getint( &acc->set, "port" ), jabber_connected_plain, gc );
        }
        
        g_free( srv );
}

static void jabber_close( struct gaim_connection *gc )
{
        struct jabber_data *jd = gc->proto_data;
        
        jabber_end_stream( gc );
        
        if( jd->r_inpa >= 0 )
                b_event_remove( jd->r_inpa );
        if( jd->w_inpa >= 0 )
                b_event_remove( jd->w_inpa );
        
        if( jd->ssl )
                ssl_disconnect( jd->ssl );
        if( jd->fd >= 0 )
                closesocket( jd->fd );
        
        if( jd->tx_len )
                g_free( jd->txq );
        
        xt_free_node( jd->node_cache );
        xt_free( jd->xt );
        
        g_free( jd->away_message );
        g_free( jd->username );
        g_free( jd );
}

static int jabber_send_im( struct gaim_connection *gc, char *who, char *message, int len, int away )
{
        struct xt_node *node;
        int st;
        
        /*
        event = xt_new_node( "active", NULL, NULL );
        xt_add_attr( event, "xlmns", "http://jabber.org/protocol/chatstates" );
        
        event = xt_new_node( "x", NULL, xt_new_node( "composing", NULL, NULL ) );
        xt_add_attr( event, "xmlns", "jabber:x:event" );
        */
        
        node = xt_new_node( "body", message, NULL );
        node = jabber_make_packet( "message", "chat", who, node );
        st = jabber_write_packet( gc, node );
        xt_free_node( node );
        
        return st;
}

static GList *jabber_away_states( struct gaim_connection *gc )
{
        static GList *l = NULL;
        int i;
        
        if( l == NULL )
                for( i = 0; jabber_away_state_list[i].full_name; i ++ )
                        l = g_list_append( l, (void*) jabber_away_state_list[i].full_name );
        
        return l;
}

static void jabber_set_away( struct gaim_connection *gc, char *state_txt, char *message )
{
        struct jabber_data *jd = gc->proto_data;
        struct jabber_away_state *state;
        
        /* Save all this info. We need it, for example, when changing the priority setting. */
        state = (void *) jabber_away_state_by_name( state_txt );
        jd->away_state = state ? state : (void *) jabber_away_state_list; /* Fall back to "Away" if necessary. */
        g_free( jd->away_message );
        jd->away_message = ( message && *message ) ? g_strdup( message ) : NULL;
        
        presence_send_update( gc );
}

static void jabber_add_buddy( struct gaim_connection *gc, char *who )
{
        if( jabber_add_to_roster( gc, who, NULL ) )
                presence_send_request( gc, who, "subscribe" );
}

static void jabber_remove_buddy( struct gaim_connection *gc, char *who, char *group )
{
        if( jabber_remove_from_roster( gc, who ) )
                presence_send_request( gc, who, "unsubscribe" );
}

static void jabber_keepalive( struct gaim_connection *gc )
{
        struct jabber_data *jd = gc->proto_data;
        struct xt_node *c, *tmp;
        
        /* Just any whitespace character is enough as a keepalive for XMPP sessions. */
        jabber_write( gc, "\n", 1 );
        
        /* Let's abuse this keepalive for garbage collection of the node cache too.
           It runs every minute, so let's mark every node with a special flag the
           first time we see it, and clean it up the second time (clean up all
           packets with the flag set).
           
           node->flags is normally only used by xmltree itself for parsing/handling,
           so it should be safe to use the variable for gc. */
        
        /* This horrible loop is explained in xmltree.c. Makes me wonder if maybe I
           didn't choose the perfect data structure... */
        for( c = jd->node_cache->children; c; c =  c->next )
                if( !( c->flags & XT_SEEN ) )
                        break;
        
        /* Now c points at the first unflagged node (or at NULL). Clean up
           everything until that point. */
        while( jd->node_cache->children != c )
        {
                /*
                printf( "Cleaning up:\n" );
                xt_print( jd->node_cache->children );
                */
                
                tmp = jd->node_cache->children->next;
                xt_free_node( jd->node_cache->children );
                jd->node_cache->children = tmp;
        }
        
        /* Now flag the ones that were still unflagged. */
        for( c = jd->node_cache->children; c; c = c->next )
        {
                /*
                printf( "Flagged:\n" );
                xt_print( c );
                */
                
                c->flags |= XT_SEEN;
        }
}

void jabber_init()
{
        struct prpl *ret = g_new0( struct prpl, 1 );
        
        ret->name = "jabber";
        ret->login = jabber_login;
        ret->acc_init = jabber_acc_init;
        ret->close = jabber_close;
        ret->send_im = jabber_send_im;
        ret->away_states = jabber_away_states;
//      ret->get_status_string = jabber_get_status_string;
        ret->set_away = jabber_set_away;
//      ret->set_info = jabber_set_info;
//      ret->get_info = jabber_get_info;
        ret->add_buddy = jabber_add_buddy;
        ret->remove_buddy = jabber_remove_buddy;
//      ret->chat_send = jabber_chat_send;
//      ret->chat_invite = jabber_chat_invite;
//      ret->chat_leave = jabber_chat_leave;
//      ret->chat_open = jabber_chat_open;
        ret->keepalive = jabber_keepalive;
//      ret->send_typing = jabber_send_typing;
        ret->handle_cmp = g_strcasecmp;

        register_protocol( ret );
}