Moving all generic files to lib/ instead of having some in / and some in

protocols/, and adding RC4 code.

1 files changed, 247 insertions, 0 deletions

diff --git a/lib/events_libevent.c b/lib/events_libevent.c
new file mode 100644
index 00000000..1119c2ab
--- /dev/null
+++ b/lib/events_libevent.c
@@ -0,0 +1,247 @@
+  /********************************************************************\
+  * BitlBee -- An IRC to other IM-networks gateway                     *
+  *                                                                    *
+  * Copyright 2002-2006 Wilmer van der Gaast and others                *
+  \********************************************************************/
+
+/*
+ * Event handling (using libevent)
+ */
+
+/*
+  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 with
+  the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
+  if not, write to the Free Software Foundation, Inc., 59 Temple Place,
+  Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#define BITLBEE_CORE
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include "proxy.h"
+
+#include <sys/time.h>
+#include <event.h>
+
+static guint id_next;
+static GHashTable *id_hash;
+static int quitting = 0;
+
+/* Since libevent doesn't handle two event handlers for one fd-condition
+   very well (which happens sometimes when BitlBee changes event handlers
+   for a combination), let's buid some indexes so we can delete them here
+   already, just in time. */
+static GHashTable *read_hash;
+static GHashTable *write_hash;
+
+struct b_event_data
+{
+	guint id;
+	struct event evinfo;
+	gint timeout;
+	b_event_handler function;
+	void *data;
+};
+
+void b_main_init()
+{
+	event_init();
+	
+	id_next = 1;
+	id_hash = g_hash_table_new( g_int_hash, g_int_equal );
+	read_hash = g_hash_table_new( g_int_hash, g_int_equal );
+	write_hash = g_hash_table_new( g_int_hash, g_int_equal );
+}
+
+void b_main_run()
+{
+	event_dispatch();
+}
+
+void b_main_quit()
+{
+	struct timeval tv;
+	
+	/* libevent sometimes generates events before really quitting,
+	   we want to stop them. */
+	quitting = 1;
+	
+	memset( &tv, 0, sizeof( struct timeval ) );
+	event_loopexit( &tv );
+}
+
+static void b_event_passthrough( int fd, short event, void *data )
+{
+	struct b_event_data *b_ev = data;
+	b_input_condition cond = 0;
+	int id;
+	
+	if( fd >= 0 )
+	{
+		if( event & EV_READ )
+			cond |= GAIM_INPUT_READ;
+		if( event & EV_WRITE )
+			cond |= GAIM_INPUT_WRITE;
+	}
+	
+	event_debug( "b_event_passthrough( %d, %d, 0x%x ) (%d)\n", fd, event, (int) data, b_ev->id );
+	
+	/* Since the called function might cancel this handler already
+	   (which free()s b_ev, we have to remember the ID here. */
+	id = b_ev->id;
+	
+	if( quitting )
+	{
+		b_event_remove( id );
+		return;
+	}
+	
+	if( !b_ev->function( b_ev->data, fd, cond ) )
+	{
+		event_debug( "Handler returned FALSE: " );
+		b_event_remove( id );
+	}
+	else if( fd == -1 )
+	{
+		struct timeval tv;
+		
+		tv.tv_sec = b_ev->timeout / 1000;
+		tv.tv_usec = ( b_ev->timeout % 1000 ) * 1000;
+		
+		evtimer_add( &b_ev->evinfo, &tv );
+	}
+}
+
+gint b_input_add( gint fd, b_input_condition condition, b_event_handler function, gpointer data )
+{
+	struct b_event_data *b_ev;
+	
+	event_debug( "b_input_add( %d, %d, 0x%x, 0x%x ) ", fd, condition, function, data );
+	
+	if( ( condition & GAIM_INPUT_READ  && ( b_ev = g_hash_table_lookup( read_hash,  &fd ) ) ) ||
+	    ( condition & GAIM_INPUT_WRITE && ( b_ev = g_hash_table_lookup( write_hash, &fd ) ) ) )
+	{
+		/* We'll stick with this libevent entry, but give it a new BitlBee id. */
+		g_hash_table_remove( id_hash, &b_ev->id );
+		
+		event_debug( "(replacing old handler (id = %d)) = %d\n", b_ev->id, id_next );
+		
+		b_ev->id = id_next++;
+		b_ev->function = function;
+		b_ev->data = data;
+	}
+	else
+	{
+		GIOCondition out_cond;
+		
+		event_debug( "(new) = %d\n", id_next );
+		
+		b_ev = g_new0( struct b_event_data, 1 );
+		b_ev->id = id_next++;
+		b_ev->function = function;
+		b_ev->data = data;
+		
+		out_cond = EV_PERSIST;
+		if( condition & GAIM_INPUT_READ )
+			out_cond |= EV_READ;
+		if( condition & GAIM_INPUT_WRITE )
+			out_cond |= EV_WRITE;
+		
+		event_set( &b_ev->evinfo, fd, out_cond, b_event_passthrough, b_ev );
+		event_add( &b_ev->evinfo, NULL );
+		
+		if( out_cond & EV_READ )
+			g_hash_table_insert( read_hash, &b_ev->evinfo.ev_fd, b_ev );
+		if( out_cond & EV_WRITE )
+			g_hash_table_insert( write_hash, &b_ev->evinfo.ev_fd, b_ev );
+	}
+	
+	g_hash_table_insert( id_hash, &b_ev->id, b_ev );
+	return b_ev->id;
+}
+
+/* TODO: Persistence for timers! */
+gint b_timeout_add( gint timeout, b_event_handler function, gpointer data )
+{
+	struct b_event_data *b_ev = g_new0( struct b_event_data, 1 );
+	struct timeval tv;
+	
+	b_ev->id = id_next++;
+	b_ev->timeout = timeout;
+	b_ev->function = function;
+	b_ev->data = data;
+	
+	tv.tv_sec = timeout / 1000;
+	tv.tv_usec = ( timeout % 1000 ) * 1000;
+	
+	evtimer_set( &b_ev->evinfo, b_event_passthrough, b_ev );
+	evtimer_add( &b_ev->evinfo, &tv );
+	
+	event_debug( "b_timeout_add( %d, 0x%x, 0x%x ) = %d\n", timeout, function, data, b_ev->id );
+	
+	g_hash_table_insert( id_hash, &b_ev->id, b_ev );
+	
+	return b_ev->id;
+}
+
+void b_event_remove( gint id )
+{
+	struct b_event_data *b_ev = g_hash_table_lookup( id_hash, &id );
+	
+	event_debug( "b_event_remove( %d )\n", id );
+	if( b_ev )
+	{
+		g_hash_table_remove( id_hash, &b_ev->id );
+		if( b_ev->evinfo.ev_fd >= 0 )
+		{
+			if( b_ev->evinfo.ev_events & EV_READ )
+				g_hash_table_remove( read_hash, &b_ev->evinfo.ev_fd );
+			if( b_ev->evinfo.ev_events & EV_WRITE )
+				g_hash_table_remove( write_hash, &b_ev->evinfo.ev_fd );
+		}
+		
+		event_del( &b_ev->evinfo );
+		g_free( b_ev );
+	}
+	else
+	{
+		event_debug( "Already removed?\n" );
+	}
+}
+
+void closesocket( int fd )
+{
+	struct b_event_data *b_ev;
+	
+	/* Since epoll() (the main reason we use libevent) automatically removes sockets from
+	   the epoll() list when a socket gets closed and some modules have a habit of
+	   closing sockets before removing event handlers, our and libevent's administration
+	   get a little bit messed up. So this little function will remove the handlers
+	   properly before closing a socket. */
+	
+	if( ( b_ev = g_hash_table_lookup( read_hash, &fd ) ) )
+	{
+		event_debug( "Warning: fd %d still had a read event handler when shutting down.\n", fd );
+		b_event_remove( b_ev->id );
+	}
+	if( ( b_ev = g_hash_table_lookup( write_hash, &fd ) ) )
+	{
+		event_debug( "Warning: fd %d still had a write event handler when shutting down.\n", fd );
+		b_event_remove( b_ev->id );
+	}
+	
+	close( fd );
+}