Merge msn-keepalive, a nice hack (not yet documented) which sends keepalives

to switchboards with offline contacts. This is meant as a work-around for
the current lack of support for offline messaging.

4 files changed, 66 insertions, 9 deletions

diff --git a/protocols/msn/msn.c b/protocols/msn/msn.c
index 37f6e1be..7dbdb9d6 100644
--- a/protocols/msn/msn.c
+++ b/protocols/msn/msn.c
@@ -37,6 +37,7 @@ static void msn_init( account_t *acc )
 	set_add( &acc->set, "display_name", NULL, set_eval_display_name, acc );
 	set_add( &acc->set, "local_display_name", "false", set_eval_bool, acc );
 	set_add( &acc->set, "mail_notifications", "false", set_eval_bool, acc );
+	set_add( &acc->set, "switchboard_keepalives", "false", set_eval_bool, acc );
 }
 
 static void msn_login( account_t *acc )
diff --git a/protocols/msn/msn.h b/protocols/msn/msn.h
index 02d180b6..83a080a3 100644
--- a/protocols/msn/msn.h
+++ b/protocols/msn/msn.h
@@ -30,6 +30,7 @@
  */
 #define TYPING_NOTIFICATION_MESSAGE "\r\r\rBEWARE, ME R TYPINK MESSAGE!!!!\r\r\r"
 #define GROUPCHAT_SWITCHBOARD_MESSAGE "\r\r\rME WANT TALK TO MANY PEOPLE\r\r\r"
+#define SB_KEEPALIVE_MESSAGE "\r\r\rDONT HANG UP ON ME!\r\r\r"
 
 #ifdef DEBUG_MSN
 #define debug( text... ) imcb_log( ic, text );
@@ -53,6 +54,10 @@
                            "TypingUser: %s\r\n" \
                            "\r\n\r\n"
 
+#define SB_KEEPALIVE_HEADERS "MIME-Version: 1.0\r\n" \
+                             "Content-Type: text/x-ping\r\n" \
+                             "\r\n\r\n"
+
 #define PROFILE_URL "http://members.msn.com/"
 
 struct msn_data
@@ -82,6 +87,7 @@ struct msn_switchboard
 	int fd;
 	gint inp;
 	struct msn_handler_data *handler;
+	gint keepalive;
 	
 	int trId;
 	int ready;
@@ -179,5 +185,7 @@ struct groupchat *msn_sb_to_chat( struct msn_switchboard *sb );
 void msn_sb_destroy( struct msn_switchboard *sb );
 gboolean msn_sb_connected( gpointer data, gint source, b_input_condition cond );
 int msn_sb_write_msg( struct im_connection *ic, struct msn_message *m );
+void msn_sb_start_keepalives( struct msn_switchboard *sb, gboolean initial );
+void msn_sb_stop_keepalives( struct msn_switchboard *sb );
 
 #endif //_MSN_H
diff --git a/protocols/msn/ns.c b/protocols/msn/ns.c
index 8181c1af..2f656ea5 100644
--- a/protocols/msn/ns.c
+++ b/protocols/msn/ns.c
@@ -421,8 +421,12 @@ static int msn_ns_command( gpointer data, char **cmd, int num_parts )
 	}
 	else if( strcmp( cmd[0], "FLN" ) == 0 )
 	{
-		if( cmd[1] )
-			imcb_buddy_status( ic, cmd[1], 0, NULL, NULL );
+		if( cmd[1] == NULL )
+			return 1;
+		
+		imcb_buddy_status( ic, cmd[1], 0, NULL, NULL );
+		
+		msn_sb_start_keepalives( msn_sb_by_handle( ic, cmd[1] ), TRUE );
 	}
 	else if( strcmp( cmd[0], "NLN" ) == 0 )
 	{
@@ -448,6 +452,8 @@ static int msn_ns_command( gpointer data, char **cmd, int num_parts )
 		imcb_buddy_status( ic, cmd[2], OPT_LOGGED_IN | 
 		                   ( st != msn_away_state_list ? OPT_AWAY : 0 ),
 		                   st->name, NULL );
+		
+		msn_sb_stop_keepalives( msn_sb_by_handle( ic, cmd[2] ) );
 	}
 	else if( strcmp( cmd[0], "RNG" ) == 0 )
 	{
diff --git a/protocols/msn/sb.c b/protocols/msn/sb.c
index e9526234..e2ee8570 100644
--- a/protocols/msn/sb.c
+++ b/protocols/msn/sb.c
@@ -167,7 +167,18 @@ int msn_sb_sendmessage( struct msn_switchboard *sb, char *text )
 		int i, j;
 		
 		/* Build the message. Convert LF to CR-LF for normal messages. */
-		if( strcmp( text, TYPING_NOTIFICATION_MESSAGE ) != 0 )
+		if( strcmp( text, TYPING_NOTIFICATION_MESSAGE ) == 0 )
+		{
+			i = strlen( MSN_TYPING_HEADERS ) + strlen( sb->ic->acc->user );
+			buf = g_new0( char, i );
+			i = g_snprintf( buf, i, MSN_TYPING_HEADERS, sb->ic->acc->user );
+		}
+		else if( strcmp( text, SB_KEEPALIVE_MESSAGE ) == 0 )
+		{
+			buf = g_strdup( SB_KEEPALIVE_HEADERS );
+			i = strlen( buf );
+		}
+		else
 		{
 			buf = g_new0( char, sizeof( MSN_MESSAGE_HEADERS ) + strlen( text ) * 2 + 1 );
 			i = strlen( MSN_MESSAGE_HEADERS );
@@ -181,12 +192,6 @@ int msn_sb_sendmessage( struct msn_switchboard *sb, char *text )
 				buf[i++] = text[j];
 			}
 		}
-		else
-		{
-			i = strlen( MSN_TYPING_HEADERS ) + strlen( sb->ic->acc->user );
-			buf = g_new0( char, i );
-			i = g_snprintf( buf, i, MSN_TYPING_HEADERS, sb->ic->acc->user );
-		}
 		
 		/* Build the final packet (MSG command + the message). */
 		packet = g_strdup_printf( "MSG %d N %d\r\n%s", ++sb->trId, i, buf );
@@ -249,6 +254,7 @@ void msn_sb_destroy( struct msn_switchboard *sb )
 	debug( "Destroying switchboard: %s", sb->who ? sb->who : sb->key ? sb->key : "" );
 	
 	msn_msgq_purge( ic, &sb->msgq );
+	msn_sb_stop_keepalives( sb );
 	
 	if( sb->key ) g_free( sb->key );
 	if( sb->who ) g_free( sb->who );
@@ -470,6 +476,8 @@ static int msn_sb_command( gpointer data, char **cmd, int num_parts )
 		}
 		
 		sb->ready = 1;
+		
+		msn_sb_start_keepalives( sb, FALSE );
 	}
 	else if( strcmp( cmd[0], "CAL" ) == 0 )
 	{
@@ -519,6 +527,8 @@ static int msn_sb_command( gpointer data, char **cmd, int num_parts )
 				sb->msgq = g_slist_remove( sb->msgq, m );
 			}
 			
+			msn_sb_start_keepalives( sb, FALSE );
+			
 			return( st );
 		}
 		else if( sb->who )
@@ -580,6 +590,8 @@ static int msn_sb_command( gpointer data, char **cmd, int num_parts )
 		
 		if( sb->who )
 		{
+			msn_sb_stop_keepalives( sb );
+			
 			/* This is a single-person chat, and the other person is leaving. */
 			g_free( sb->who );
 			sb->who = NULL;
@@ -763,3 +775,33 @@ static int msn_sb_message( gpointer data, char *msg, int msglen, char **cmd, int
 	
 	return( 1 );
 }
+
+static gboolean msn_sb_keepalive( gpointer data, gint source, b_input_condition cond )
+{
+	struct msn_switchboard *sb = data;
+	return sb->ready && msn_sb_sendmessage( sb, SB_KEEPALIVE_MESSAGE );
+}
+
+void msn_sb_start_keepalives( struct msn_switchboard *sb, gboolean initial )
+{
+	struct buddy *b;
+	
+	if( sb && sb->who && sb->keepalive == 0 &&
+	    ( b = imcb_find_buddy( sb->ic, sb->who ) ) && !b->present &&
+	    set_getbool( &sb->ic->acc->set, "switchboard_keepalives" ) )
+	{
+		if( initial )
+			msn_sb_keepalive( sb, 0, 0 );
+		
+		sb->keepalive = b_timeout_add( 20000, msn_sb_keepalive, sb );
+	}
+}
+
+void msn_sb_stop_keepalives( struct msn_switchboard *sb )
+{
+	if( sb && sb->keepalive > 0 )
+	{
+		b_event_remove( sb->keepalive );
+		sb->keepalive = 0;
+	}
+}