X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fngircd%2Fconn.c;h=405c07b21c9756c2f07889db1afd14e203017287;hb=47a0379e2bef76959d2a0c06ceaea6b80e5d614d;hp=e8ea4b061b08073c0237f756ff9ec88b21bc30f5;hpb=2a9ffe7037bd60aec5f8ac028fb87bb3a7c6f9ef;p=ngircd-alex.git

diff --git a/src/ngircd/conn.c b/src/ngircd/conn.c
index e8ea4b06..405c07b2 100644
--- a/src/ngircd/conn.c
+++ b/src/ngircd/conn.c
@@ -1,6 +1,6 @@
 /*
  * ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001-2005 Alexander Barton <alex@barton.de>
+ * Copyright (c)2001-2007 Alexander Barton (alex@barton.de)
  *
  * 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
@@ -17,7 +17,7 @@
 #include "portab.h"
 #include "io.h"
 
-static char UNUSED id[] = "$Id: conn.c,v 1.191 2006/03/18 22:27:09 fw Exp $";
+static char UNUSED id[] = "$Id: conn.c,v 1.216 2007/11/23 16:28:37 fw Exp $";
 
 #include "imp.h"
 #include <assert.h>
@@ -83,6 +83,7 @@ static char UNUSED id[] = "$Id: conn.c,v 1.191 2006/03/18 22:27:09 fw Exp $";
 
 
 static bool Handle_Write PARAMS(( CONN_ID Idx ));
+static bool Conn_Write PARAMS(( CONN_ID Idx, char *Data, size_t Len ));
 static int New_Connection PARAMS(( int Sock ));
 static CONN_ID Socket2Index PARAMS(( int Sock ));
 static void Read_Request PARAMS(( CONN_ID Idx ));
@@ -91,7 +92,7 @@ static void Check_Connections PARAMS(( void ));
 static void Check_Servers PARAMS(( void ));
 static void Init_Conn_Struct PARAMS(( CONN_ID Idx ));
 static bool Init_Socket PARAMS(( int Sock ));
-static void New_Server PARAMS(( int Server ));
+static void New_Server PARAMS(( int Server, struct in_addr *dest));
 static void Simple_Message PARAMS(( int Sock, const char *Msg ));
 static int Count_Connections PARAMS(( struct sockaddr_in addr ));
 static int NewListener PARAMS(( const UINT16 Port ));
@@ -123,7 +124,6 @@ cb_connserver(int sock, UNUSED short what)
 {
 	int res, err;
 	socklen_t sock_len;
-	CLIENT *c;
 	CONN_ID idx = Socket2Index( sock );
 	if (idx <= NONE) {
 		LogDebug("cb_connserver wants to write on unknown socket?!");
@@ -150,14 +150,7 @@ cb_connserver(int sock, UNUSED short what)
  			    Conf_Server[Conf_GetServer(idx)].port,
  			    idx, strerror(err));
 
-		/* Clean up the CLIENT structure (to avoid silly log
- 		 * messages) and call Conn_Close() to do the rest. */
- 		c = Client_GetFromConn(idx);
- 		if (c)
-			Client_DestroyNow(c);
- 
- 		Conn_Close(idx, "Can't connect!", NULL, false);
- 
+		Conn_Close(idx, "Can't connect!", NULL, false);
 		return;
 	}
 
@@ -216,12 +209,13 @@ Conn_Init( void )
 		if( Pool_Size > Conf_MaxConnections ) Pool_Size = Conf_MaxConnections;
 	}
 	
-	if (!array_alloc(&My_ConnArray, sizeof(CONNECTION),  Pool_Size)) {
+	if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), (size_t)Pool_Size)) {
 		Log( LOG_EMERG, "Can't allocate memory! [Conn_Init]" );
 		exit( 1 );
 	}
 
-	/* XXX: My_Connetions/Pool_Size are needed by other parts of the code; remove them */
+	/* FIXME: My_Connetions/Pool_Size is needed by other parts of the
+	 * code; remove them! */
 	My_Connections = (CONNECTION*) array_start(&My_ConnArray);
 
 	LogDebug("Allocated connection pool for %d items (%ld bytes).",
@@ -269,7 +263,8 @@ Conn_Exit( void )
 static unsigned int
 ports_initlisteners(array *a, void (*func)(int,short))
 {
-	unsigned int created = 0, len;
+	unsigned int created = 0;
+	size_t len;
 	int fd;
 	UINT16 *port;
 
@@ -296,7 +291,7 @@ ports_initlisteners(array *a, void (*func)(int,short))
 }
 
 
-GLOBAL int
+GLOBAL unsigned int
 Conn_InitListeners( void )
 {
 	/* Initialize ports on which the server should accept connections */
@@ -328,7 +323,7 @@ Conn_ExitListeners( void )
 	Log( LOG_INFO, "Shutting down all listening sockets (%d total)...", arraylen );
 	fd = array_start(&My_Listeners);
 	while(arraylen--) {
-		assert(fd);
+		assert(fd != NULL);
 		assert(*fd >= 0);
 		io_close(*fd);
 		LogDebug("Listening socket %d closed.", *fd );
@@ -338,6 +333,42 @@ Conn_ExitListeners( void )
 } /* Conn_ExitListeners */
 
 
+static void
+InitSinaddr(struct sockaddr_in *addr, UINT16 Port)
+{
+	struct in_addr inaddr;
+
+	memset(addr, 0, sizeof(*addr));
+	memset( &inaddr, 0, sizeof(inaddr));
+
+	addr->sin_family = AF_INET;
+	addr->sin_port = htons(Port);
+	inaddr.s_addr = htonl(INADDR_ANY);
+	addr->sin_addr = inaddr;
+}
+
+
+static bool
+InitSinaddrListenAddr(struct sockaddr_in *addr, UINT16 Port)
+{
+	struct in_addr inaddr;
+
+	InitSinaddr(addr, Port);
+
+	if (!Conf_ListenAddress[0])
+		return true;
+
+	if (!ngt_IPStrToBin(Conf_ListenAddress, &inaddr)) {
+		Log( LOG_CRIT, "Can't bind to %s:%u: can't convert ip address \"%s\"",
+				Conf_ListenAddress, Port, Conf_ListenAddress);
+		return false;
+	}
+
+	addr->sin_addr = inaddr;
+	return true;
+}
+
+
 /* return new listening port file descriptor or -1 on failure */
 static int
 NewListener( const UINT16 Port )
@@ -345,33 +376,15 @@ NewListener( const UINT16 Port )
 	/* Create new listening socket on specified port */
 
 	struct sockaddr_in addr;
-	struct in_addr inaddr;
 	int sock;
 #ifdef ZEROCONF
 	char name[CLIENT_ID_LEN], *info;
 #endif
 
-	/* Server-"Listen"-Socket initialisieren */
-	memset( &addr, 0, sizeof( addr ));
-	memset( &inaddr, 0, sizeof( inaddr ));
+	InitSinaddrListenAddr(&addr, Port);
+
 	addr.sin_family = AF_INET;
 	addr.sin_port = htons( Port );
-	if( Conf_ListenAddress[0] )
-	{
-#ifdef HAVE_INET_ATON
-		if( inet_aton( Conf_ListenAddress, &inaddr ) == 0 )
-#else
-		inaddr.s_addr = inet_addr( Conf_ListenAddress );
-		if( inaddr.s_addr == (unsigned)-1 )
-#endif
-		{
-			Log( LOG_CRIT, "Can't listen on %s:%u: can't convert ip address %s!",
-					Conf_ListenAddress, Port, Conf_ListenAddress );
-			return -1;
-		}
-	}
-	else inaddr.s_addr = htonl( INADDR_ANY );
-	addr.sin_addr = inaddr;
 
 	sock = socket( PF_INET, SOCK_STREAM, 0);
 	if( sock < 0 ) {
@@ -381,8 +394,8 @@ NewListener( const UINT16 Port )
 
 	if( ! Init_Socket( sock )) return -1;
 
-	if( bind( sock, (struct sockaddr *)&addr, (socklen_t)sizeof( addr )) != 0 ) {
-		Log( LOG_CRIT, "Can't bind socket: %s!", strerror( errno ));
+	if (bind(sock, (struct sockaddr *)&addr, (socklen_t)sizeof(addr)) != 0) {
+		Log( LOG_CRIT, "Can't bind socket (port %d) : %s!", Port, strerror( errno ));
 		close( sock );
 		return -1;
 	}
@@ -424,8 +437,11 @@ NewListener( const UINT16 Port )
 	}
 
 	/* Add port number to description if non-standard */
-	if( Port != 6667 ) snprintf( name, sizeof( name ), "%s (port %u)", info, Port );
-	else strlcpy( name, info, sizeof( name ));
+	if (Port != 6667)
+		snprintf(name, sizeof name, "%s (port %u)", info,
+		 	 (unsigned int)Port);
+	else
+	 	strlcpy(name, info, sizeof name);
 
 	/* Register service */
 	Rendezvous_Register( name, MDNS_TYPE, Port );
@@ -482,7 +498,7 @@ Conn_Handler( void )
 			if ( My_Connections[i].sock <= NONE )
 				continue;
 
-			wdatalen = array_bytes(&My_Connections[i].wbuf);
+			wdatalen = (unsigned int)array_bytes(&My_Connections[i].wbuf);
 
 #ifdef ZLIB
 			if (( wdatalen > 0 ) || ( array_bytes(&My_Connections[i].zip.wbuf)> 0 ))
@@ -602,7 +618,6 @@ va_dcl
 #endif
 
 	len = strlcat( buffer, "\r\n", sizeof( buffer ));
-	assert(len < COMMAND_LEN);
 	ok = Conn_Write(Idx, buffer, len);
 	My_Connections[Idx].msg_out++;
 
@@ -611,51 +626,74 @@ va_dcl
 } /* Conn_WriteStr */
 
 
-GLOBAL bool
-Conn_Write( CONN_ID Idx, char *Data, unsigned int Len )
+/**
+ * Append Data to the outbound write buffer of a connection.
+ * @param Idx Index of the connection.
+ * @param Data pointer to the data.
+ * @param Len length of Data.
+ * @return true on success, false otherwise.
+ */
+static bool
+Conn_Write( CONN_ID Idx, char *Data, size_t Len )
 {
-	/* Daten in Socket schreiben. Bei "fatalen" Fehlern wird
-	 * der Client disconnectiert und false geliefert. */
-
+	CLIENT *c;
+	size_t writebuf_limit = WRITEBUFFER_LEN;
 	assert( Idx > NONE );
 	assert( Data != NULL );
 	assert( Len > 0 );
 
-	/* Ist der entsprechende Socket ueberhaupt noch offen? In einem
-	 * "Handler-Durchlauf" kann es passieren, dass dem nicht mehr so
-	 * ist, wenn einer von mehreren Conn_Write()'s fehlgeschlagen ist.
-	 * In diesem Fall wird hier einfach ein Fehler geliefert. */
+	c = Conn_GetClient(Idx);
+	assert( c != NULL);
+
+	/* Servers do get special write buffer limits, so they can generate
+	 * all the messages that are required while peering. */
+	if (Client_Type(c) == CLIENT_SERVER)
+		writebuf_limit = WRITEBUFFER_SLINK_LEN;
+
+	/* Is the socket still open? A previous call to Conn_Write()
+	 * may have closed the connection due to a fatal error.
+	 * In this case it is sufficient to return an error, as well. */
 	if( My_Connections[Idx].sock <= NONE ) {
-		LogDebug("Skipped write on closed socket (connection %d).", Idx );
+		LogDebug("Skipped write on closed socket (connection %d).", Idx);
 		return false;
 	}
 
-	/* Pruefen, ob im Schreibpuffer genuegend Platz ist. Ziel ist es,
-	 * moeglichts viel im Puffer zu haben und _nicht_ gleich alles auf den
-	 * Socket zu schreiben (u.a. wg. Komprimierung). */
-	if( array_bytes(&My_Connections[Idx].wbuf) >= WRITEBUFFER_LEN) {
-		/* Der Puffer ist dummerweise voll. Jetzt versuchen, den Puffer
-		 * zu schreiben, wenn das nicht klappt, haben wir ein Problem ... */
-		if( ! Handle_Write( Idx )) return false;
-
-		/* check again: if our writebuf is twice als large as the initial limit: Kill connection */
-		if( array_bytes(&My_Connections[Idx].wbuf) >= (WRITEBUFFER_LEN*2)) {
-			Log( LOG_NOTICE, "Write buffer overflow (connection %d)!", Idx );
-			Conn_Close( Idx, "Write buffer overflow!", NULL, false );
-			return false;
-		}
-	}
-
 #ifdef ZLIB
 	if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
-		/* Daten komprimieren und in Puffer kopieren */
-		if( ! Zip_Buffer( Idx, Data, Len )) return false;
+		/* Compressed link:
+		 * Zip_Buffer() does all the dirty work for us: it flushes
+		 * the (pre-)compression buffers if required and handles
+		 * all error conditions. */
+		if (!Zip_Buffer(Idx, Data, Len))
+			return false;
 	}
 	else
 #endif
 	{
-		/* Daten in Puffer kopieren */
-		if (!array_catb( &My_Connections[Idx].wbuf, Data, Len ))
+		/* Uncompressed link:
+		 * Check if outbound buffer has enough space for the data. */
+		if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
+		    writebuf_limit) {
+			/* Buffer is full, flush it. Handle_Write deals with
+			 * low-level errors, if any. */
+			if (!Handle_Write(Idx))
+				return false;
+		}
+
+		/* When the write buffer is still too big after flushing it,
+		 * the connection will be killed. */
+		if (array_bytes(&My_Connections[Idx].wbuf) + Len >=
+		    writebuf_limit) {
+			Log(LOG_NOTICE,
+			    "Write buffer overflow (connection %d, size %lu byte)!",
+			    Idx,
+			    (unsigned long)array_bytes(&My_Connections[Idx].wbuf));
+			Conn_Close(Idx, "Write buffer overflow!", NULL, false);
+			return false;
+		}
+
+		/* Copy data to write buffer */
+		if (!array_catb(&My_Connections[Idx].wbuf, Data, Len))
 			return false;
 
 		My_Connections[Idx].bytes_out += Len;
@@ -696,15 +734,20 @@ Conn_Close( CONN_ID Idx, char *LogMsg, char *FwdMsg, bool InformClient )
 
 	/* Mark link as "closing" */
 	Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCLOSING );
-		
-	if( LogMsg ) txt = LogMsg;
-	else txt = FwdMsg;
-	if( ! txt ) txt = "Reason unknown";
 
-	Log( LOG_INFO, "Shutting down connection %d (%s) with %s:%d ...", Idx, LogMsg ? LogMsg : FwdMsg, My_Connections[Idx].host, ntohs( My_Connections[Idx].addr.sin_port ));
+	if (LogMsg)
+		txt = LogMsg;
+	else
+		txt = FwdMsg;
+	if (! txt)
+		txt = "Reason unknown";
+
+	Log(LOG_INFO, "Shutting down connection %d (%s) with %s:%d ...", Idx,
+	    LogMsg ? LogMsg : FwdMsg, My_Connections[Idx].host,
+	    ntohs(My_Connections[Idx].addr.sin_port));
 
 	/* Search client, if any */
-	c = Client_GetFromConn( Idx );
+	c = Conn_GetClient( Idx );
 
 	/* Should the client be informed? */
 	if (InformClient) {
@@ -719,7 +762,6 @@ Conn_Close( CONN_ID Idx, char *LogMsg, char *FwdMsg, bool InformClient )
 			 (double)My_Connections[Idx].bytes_out / 1024);
 		}
 #endif
-
 		/* Send ERROR to client (see RFC!) */
 		if (FwdMsg)
 			Conn_WriteStr(Idx, "ERROR :%s", FwdMsg);
@@ -734,42 +776,60 @@ Conn_Close( CONN_ID Idx, char *LogMsg, char *FwdMsg, bool InformClient )
 	(void)Handle_Write( Idx );
 
 	/* Search client, if any (re-check!) */
-	c = Client_GetFromConn( Idx );
+	c = Conn_GetClient( Idx );
 
 	/* Shut down socket */
-	if( ! io_close( My_Connections[Idx].sock ))
-	{
+	if (! io_close(My_Connections[Idx].sock)) {
 		/* Oops, we can't close the socket!? This is ... ugly! */
-		Log( LOG_CRIT, "Error closing connection %d (socket %d) with %s:%d - %s! (ignored)", Idx, My_Connections[Idx].sock, My_Connections[Idx].host, ntohs( My_Connections[Idx].addr.sin_port), strerror( errno ));
+		Log(LOG_CRIT,
+		    "Error closing connection %d (socket %d) with %s:%d - %s! (ignored)",
+		    Idx, My_Connections[Idx].sock, My_Connections[Idx].host,
+		    ntohs(My_Connections[Idx].addr.sin_port), strerror(errno));
 	}
 
 	/* Mark socket as invalid: */
 	My_Connections[Idx].sock = NONE;
 
 	/* If there is still a client, unregister it now */
-	if( c ) Client_Destroy( c, LogMsg, FwdMsg, true );
+	if (c)
+		Client_Destroy(c, LogMsg, FwdMsg, true);
 
 	/* Calculate statistics and log information */
 	in_k = (double)My_Connections[Idx].bytes_in / 1024;
 	out_k = (double)My_Connections[Idx].bytes_out / 1024;
 #ifdef ZLIB
-	if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
+	if (Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP)) {
 		in_z_k = (double)My_Connections[Idx].zip.bytes_in / 1024;
 		out_z_k = (double)My_Connections[Idx].zip.bytes_out / 1024;
+		/* Make sure that no division by zero can occur during
+		 * the calculation of in_p and out_p: in_z_k and out_z_k
+		 * are non-zero, that's guaranteed by the protocol until
+		 * compression can be enabled. */
+		if (! in_z_k)
+			in_z_k = in_k;
+		if (! out_z_k)
+			out_z_k = out_k;
 		in_p = (int)(( in_k * 100 ) / in_z_k );
 		out_p = (int)(( out_k * 100 ) / out_z_k );
-		Log( LOG_INFO, "Connection %d with %s:%d closed (in: %.1fk/%.1fk/%d%%, out: %.1fk/%.1fk/%d%%).", Idx, My_Connections[Idx].host, ntohs( My_Connections[Idx].addr.sin_port ), in_k, in_z_k, in_p, out_k, out_z_k, out_p );
+		Log(LOG_INFO,
+		    "Connection %d with %s:%d closed (in: %.1fk/%.1fk/%d%%, out: %.1fk/%.1fk/%d%%).",
+		    Idx, My_Connections[Idx].host,
+		    ntohs(My_Connections[Idx].addr.sin_port),
+		    in_k, in_z_k, in_p, out_k, out_z_k, out_p);
 	}
 	else
 #endif
 	{
-		Log( LOG_INFO, "Connection %d with %s:%d closed (in: %.1fk, out: %.1fk).", Idx, My_Connections[Idx].host, ntohs( My_Connections[Idx].addr.sin_port ), in_k, out_k );
+		Log(LOG_INFO,
+		    "Connection %d with %s:%d closed (in: %.1fk, out: %.1fk).",
+		    Idx, My_Connections[Idx].host,
+		    ntohs(My_Connections[Idx].addr.sin_port),
+		    in_k, out_k);
 	}
 
 	/* cancel running resolver */
-	if (Resolve_INPROGRESS(&My_Connections[Idx].res_stat)) {
+	if (Resolve_INPROGRESS(&My_Connections[Idx].res_stat))
 		Resolve_Shutdown(&My_Connections[Idx].res_stat);
-	}
 
 	/* Servers: Modify time of next connect attempt? */
 	Conf_UnsetServer( Idx );
@@ -786,6 +846,7 @@ Conn_Close( CONN_ID Idx, char *LogMsg, char *FwdMsg, bool InformClient )
 
 	array_free(&My_Connections[Idx].rbuf);
 	array_free(&My_Connections[Idx].wbuf);
+
 	/* Clean up connection structure (=free it) */
 	Init_Conn_Struct( Idx );
 
@@ -809,7 +870,7 @@ Conn_SyncServerStruct( void )
 			continue;
 
 		/* Server connection? */
-		client = Client_GetFromConn( i );
+		client = Conn_GetClient( i );
 		if(( ! client ) || ( Client_Type( client ) != CLIENT_SERVER )) continue;
 
 		for( c = 0; c < MAX_SERVERS; c++ )
@@ -825,13 +886,14 @@ Conn_SyncServerStruct( void )
 } /* SyncServerStruct */
 
 
+/**
+ * Send out data of write buffer; connect new sockets.
+ */
 static bool
 Handle_Write( CONN_ID Idx )
 {
-	/* Daten aus Schreibpuffer versenden bzw. Connection aufbauen */
-
-	int len;
-	unsigned int wdatalen;
+	ssize_t len;
+	size_t wdatalen;
 
 	assert( Idx > NONE );
 	if ( My_Connections[Idx].sock < 0 ) {
@@ -840,28 +902,29 @@ Handle_Write( CONN_ID Idx )
 	}
 	assert( My_Connections[Idx].sock > NONE );
 
-	LogDebug("Handle_Write() called for connection %d ...", Idx);
-
 	wdatalen = array_bytes(&My_Connections[Idx].wbuf );
+
 #ifdef ZLIB
-	if (wdatalen == 0 && !array_bytes(&My_Connections[Idx].zip.wbuf)) {
-		io_event_del(My_Connections[Idx].sock, IO_WANTWRITE );
-		return true;
+	if (wdatalen == 0) {
+		/* Write buffer is empty, so we try to flush the compression
+		 * buffer and get some data to work with from there :-) */
+		if (!Zip_Flush(Idx))
+			return false;
+
+		/* Now the write buffer most probably has changed: */
+		wdatalen = array_bytes(&My_Connections[Idx].wbuf);
 	}
+#endif
 
-	/* write buffer empty, but not compression buffer?
-         * -> flush compression buffer! */
-	if (wdatalen == 0)
-		Zip_Flush(Idx);
-#else
 	if (wdatalen == 0) {
+		/* Still no data, fine. */
 		io_event_del(My_Connections[Idx].sock, IO_WANTWRITE );
 		return true;
 	}
-#endif
 
- 	/* Zip_Flush() may have changed the write buffer ... */
-	wdatalen = array_bytes(&My_Connections[Idx].wbuf);
+	LogDebug
+	    ("Handle_Write() called for connection %d, %ld bytes pending ...",
+	     Idx, wdatalen);
 
 	len = write(My_Connections[Idx].sock,
 	            array_start(&My_Connections[Idx].wbuf), wdatalen );
@@ -877,7 +940,7 @@ Handle_Write( CONN_ID Idx )
 	}
 
 	/* move any data not yet written to beginning */
-	array_moveleft(&My_Connections[Idx].wbuf, 1, len);
+	array_moveleft(&My_Connections[Idx].wbuf, 1, (size_t)len);
 
 	return true;
 } /* Handle_Write */
@@ -899,11 +962,11 @@ New_Connection( int Sock )
 
 	assert( Sock > NONE );
 	/* Connection auf Listen-Socket annehmen */
-	new_sock_len = sizeof( new_addr );
-	new_sock = accept( Sock, (struct sockaddr *)&new_addr, (socklen_t *)&new_sock_len );
-	if( new_sock < 0 )
-	{
-		Log( LOG_CRIT, "Can't accept connection: %s!", strerror( errno ));
+	new_sock_len = (int)sizeof new_addr;
+	new_sock = accept(Sock, (struct sockaddr *)&new_addr,
+			  (socklen_t *)&new_sock_len);
+	if (new_sock < 0) {
+		Log(LOG_CRIT, "Can't accept connection: %s!", strerror(errno));
 		return -1;
 	}
 
@@ -948,7 +1011,8 @@ New_Connection( int Sock )
 			return -1;
 		}
 
-		if (!array_alloc(&My_ConnArray, sizeof( CONNECTION ), new_sock)) {
+		if (!array_alloc(&My_ConnArray, sizeof(CONNECTION),
+				 (size_t)new_sock)) {
 			Log( LOG_EMERG, "Can't allocate memory! [New_Connection]" );
 			Simple_Message( new_sock, "ERROR: Internal error" );
 			close( new_sock );
@@ -959,27 +1023,30 @@ New_Connection( int Sock )
 
 		/* Adjust pointer to new block */
 		My_Connections = array_start(&My_ConnArray);
-		Pool_Size = new_Pool_Size;
+		while (Pool_Size < new_Pool_Size)
+			Init_Conn_Struct(Pool_Size++);
+	}
+
+	/* register callback */
+	if (!io_event_create( new_sock, IO_WANTREAD, cb_clientserver)) {
+		Log(LOG_ALERT, "Can't accept connection: io_event_create failed!");
+		Simple_Message(new_sock, "ERROR :Internal error");
+		close(new_sock);
+		return -1;
 	}
 
 	c = Client_NewLocal( new_sock, inet_ntoa( new_addr.sin_addr ), CLIENT_UNKNOWN, false );
 	if( ! c ) {
-		Log( LOG_ALERT, "Can't accept connection: can't create client structure!" );
-		Simple_Message( new_sock, "ERROR :Internal error" );
-		close( new_sock );
+		Log(LOG_ALERT, "Can't accept connection: can't create client structure!");
+		Simple_Message(new_sock, "ERROR :Internal error");
+		io_close(new_sock);
 		return -1;
 	}
 
 	Init_Conn_Struct( new_sock );
 	My_Connections[new_sock].sock = new_sock;
 	My_Connections[new_sock].addr = new_addr;
-
-	/* register callback */
-	if (!io_event_create( new_sock, IO_WANTREAD, cb_clientserver)) {
-		Simple_Message( new_sock, "ERROR :Internal error" );
-		Conn_Close( new_sock, "io_event_create() failed", NULL, false );
-		return -1;
-	}
+	My_Connections[new_sock].client = c;
 
 	Log( LOG_INFO, "Accepted connection %d from %s:%d on socket %d.", new_sock,
 			inet_ntoa( new_addr.sin_addr ), ntohs( new_addr.sin_port), Sock );
@@ -990,11 +1057,11 @@ New_Connection( int Sock )
 
 	Client_SetHostname( c, My_Connections[new_sock].host );
 
-	Resolve_Addr(&My_Connections[new_sock].res_stat, &new_addr,
-		My_Connections[new_sock].sock, cb_Read_Resolver_Result);
+	if (!Conf_NoDNS)
+		Resolve_Addr(&My_Connections[new_sock].res_stat, &new_addr,
+			My_Connections[new_sock].sock, cb_Read_Resolver_Result);
 
-	/* Penalty-Zeit setzen */
-	Conn_SetPenalty( new_sock, 4 );
+	Conn_SetPenalty(new_sock, 4);
 	return new_sock;
 } /* New_Connection */
 
@@ -1016,61 +1083,69 @@ Socket2Index( int Sock )
 } /* Socket2Index */
 
 
+/**
+ * Read data from the network to the read buffer. If an error occures,
+ * the socket of this connection will be shut down.
+ */
 static void
 Read_Request( CONN_ID Idx )
 {
-	/* Daten von Socket einlesen und entsprechend behandeln.
-	 * Tritt ein Fehler auf, so wird der Socket geschlossen. */
-
-	int len;
-	char readbuf[1024];
+	ssize_t len;
+	char readbuf[READBUFFER_LEN];
 	CLIENT *c;
-
 	assert( Idx > NONE );
 	assert( My_Connections[Idx].sock > NONE );
 
 #ifdef ZLIB
-	if (( array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN ) ||
-		( array_bytes(&My_Connections[Idx].zip.rbuf) >= ZREADBUFFER_LEN ))
+	if ((array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN) ||
+		(array_bytes(&My_Connections[Idx].zip.rbuf) >= READBUFFER_LEN))
 #else
-	if ( array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN )
+	if (array_bytes(&My_Connections[Idx].rbuf) >= READBUFFER_LEN)
 #endif
 	{
-		/* Der Lesepuffer ist voll */
-		Log( LOG_ERR, "Receive buffer overflow (connection %d): %d bytes!", Idx,
-						array_bytes(&My_Connections[Idx].rbuf));
+		/* Read buffer is full */
+		Log(LOG_ERR,
+		    "Receive buffer overflow (connection %d): %d bytes!",
+		    Idx, array_bytes(&My_Connections[Idx].rbuf));
 		Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
 		return;
 	}
 
-	len = read( My_Connections[Idx].sock, readbuf, sizeof readbuf -1 );
-	if( len == 0 ) {
-		Log( LOG_INFO, "%s:%d (%s) is closing the connection ...",
-			My_Connections[Idx].host, ntohs( My_Connections[Idx].addr.sin_port),
-					inet_ntoa( My_Connections[Idx].addr.sin_addr ));
-		Conn_Close( Idx, "Socket closed!", "Client closed connection", false );
+	len = read(My_Connections[Idx].sock, readbuf, sizeof(readbuf));
+	if (len == 0) {
+		Log(LOG_INFO, "%s:%d (%s) is closing the connection ...",
+		    My_Connections[Idx].host,
+		    ntohs(My_Connections[Idx].addr.sin_port),
+		    inet_ntoa( My_Connections[Idx].addr.sin_addr));
+		Conn_Close(Idx,
+			   "Socket closed!", "Client closed connection",
+			   false);
 		return;
 	}
 
-	if( len < 0 ) {
+	if (len < 0) {
 		if( errno == EAGAIN ) return;
-		Log( LOG_ERR, "Read error on connection %d (socket %d): %s!", Idx,
-					My_Connections[Idx].sock, strerror( errno ));
-		Conn_Close( Idx, "Read error!", "Client closed connection", false );
+		Log(LOG_ERR, "Read error on connection %d (socket %d): %s!",
+		    Idx, My_Connections[Idx].sock, strerror(errno));
+		Conn_Close(Idx, "Read error!", "Client closed connection",
+			   false);
 		return;
 	}
 #ifdef ZLIB
-	if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP )) {
-		if (!array_catb( &My_Connections[Idx].zip.rbuf, readbuf, len)) {
-			Log( LOG_ERR, "Could not append recieved data to zip input buffer (connn %d): %d bytes!", Idx, len );
-			Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
+	if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
+		if (!array_catb(&My_Connections[Idx].zip.rbuf, readbuf,
+				(size_t) len)) {
+			Log(LOG_ERR,
+			    "Could not append recieved data to zip input buffer (connn %d): %d bytes!",
+			    Idx, len);
+			Conn_Close(Idx, "Receive buffer overflow!", NULL,
+				   false);
 			return;
 		}
 	} else
 #endif
 	{
-		readbuf[len] = 0;
-		if (!array_cats( &My_Connections[Idx].rbuf, readbuf )) {
+		if (!array_catb( &My_Connections[Idx].rbuf, readbuf, len)) {
 			Log( LOG_ERR, "Could not append recieved data to input buffer (connn %d): %d bytes!", Idx, len );
 			Conn_Close( Idx, "Receive buffer overflow!", NULL, false );
 		}
@@ -1082,12 +1157,15 @@ Read_Request( CONN_ID Idx )
 	/* Update timestamp of last data received if this connection is
 	 * registered as a user, server or service connection. Don't update
 	 * otherwise, so users have at least Conf_PongTimeout seconds time to
-	 * register with the IRC server -- see Check_Connections(). */
-	c = Client_GetFromConn(Idx);
+	 * register with the IRC server -- see Check_Connections().
+	 * Set "lastping", too, so we can handle time shifts backwards ... */
+	c = Conn_GetClient(Idx);
 	if (c && (Client_Type(c) == CLIENT_USER
 		  || Client_Type(c) == CLIENT_SERVER
-		  || Client_Type(c) == CLIENT_SERVICE))
+		  || Client_Type(c) == CLIENT_SERVICE)) {
 		My_Connections[Idx].lastdata = time(NULL);
+		My_Connections[Idx].lastping = My_Connections[Idx].lastdata;
+	}
 
 	/* Look at the data in the (read-) buffer of this connection */
 	Handle_Buffer(Idx);
@@ -1103,7 +1181,7 @@ Handle_Buffer( CONN_ID Idx )
 	char *ptr1, *ptr2;
 #endif
 	char *ptr;
-	int len, delta;
+	size_t len, delta;
 	bool result;
 	time_t starttime;
 #ifdef ZLIB
@@ -1152,7 +1230,7 @@ Handle_Buffer( CONN_ID Idx )
 
 		len = ( ptr - (char*) array_start(&My_Connections[Idx].rbuf)) + delta;
 
-		if( len < 0 || len > ( COMMAND_LEN - 1 )) {
+		if( len > ( COMMAND_LEN - 1 )) {
 			/* Request must not exceed 512 chars (incl. CR+LF!), see
 			 * RFC 2812. Disconnect Client if this happens. */
 			Log( LOG_ERR, "Request too long (connection %d): %d bytes (max. %d expected)!",
@@ -1186,11 +1264,6 @@ Handle_Buffer( CONN_ID Idx )
 			/* The last Command activated Socket-Compression.
 			 * Data that was read after that needs to be copied to Unzip-buf
 			 * for decompression */
-			if( array_bytes(&My_Connections[Idx].rbuf)> ZREADBUFFER_LEN ) {
-				Log( LOG_ALERT, "Connection %d: No space left in unzip buf (need %u bytes)!",
-								Idx, array_bytes(&My_Connections[Idx].rbuf ));
-				return false;
-			}
 			if (!array_copy( &My_Connections[Idx].zip.rbuf, &My_Connections[Idx].rbuf ))
 				return false;
 
@@ -1205,39 +1278,43 @@ Handle_Buffer( CONN_ID Idx )
 
 
 static void
-Check_Connections( void )
+Check_Connections(void)
 {
 	/* check if connections are alive. if not, play PING-PONG first.
 	 * if this doesn't help either, disconnect client. */
 	CLIENT *c;
 	CONN_ID i;
 
-	for( i = 0; i < Pool_Size; i++ ) {
+	for (i = 0; i < Pool_Size; i++) {
 		if (My_Connections[i].sock < 0)
 			continue;
 
-		c = Client_GetFromConn( i );
-		if( c && (( Client_Type( c ) == CLIENT_USER ) || ( Client_Type( c ) == CLIENT_SERVER ) || ( Client_Type( c ) == CLIENT_SERVICE )))
-		{
+		c = Conn_GetClient(i);
+		if (c && ((Client_Type(c) == CLIENT_USER)
+			  || (Client_Type(c) == CLIENT_SERVER)
+			  || (Client_Type(c) == CLIENT_SERVICE))) {
 			/* connected User, Server or Service */
-			if( My_Connections[i].lastping > My_Connections[i].lastdata ) {
-				/* we already sent a ping */
-				if( My_Connections[i].lastping < time( NULL ) - Conf_PongTimeout ) {
+			if (My_Connections[i].lastping >
+			    My_Connections[i].lastdata) {
+				/* We already sent a ping */
+				if (My_Connections[i].lastping <
+				    time(NULL) - Conf_PongTimeout) {
 					/* Timeout */
-					LogDebug("Connection %d: Ping timeout: %d seconds.",
-									i, Conf_PongTimeout );
-					Conn_Close( i, NULL, "Ping timeout", true );
+					LogDebug
+					    ("Connection %d: Ping timeout: %d seconds.",
+					     i, Conf_PongTimeout);
+					Conn_Close(i, NULL, "Ping timeout",
+						   true);
 				}
+			} else if (My_Connections[i].lastdata <
+				   time(NULL) - Conf_PingTimeout) {
+				/* We need to send a PING ... */
+				LogDebug("Connection %d: sending PING ...", i);
+				My_Connections[i].lastping = time(NULL);
+				Conn_WriteStr(i, "PING :%s",
+					      Client_ID(Client_ThisServer()));
 			}
-			else if( My_Connections[i].lastdata < time( NULL ) - Conf_PingTimeout ) {
-				/* we need to sent a PING */
-				LogDebug("Connection %d: sending PING ...", i );
-				My_Connections[i].lastping = time( NULL );
-				Conn_WriteStr( i, "PING :%s", Client_ID( Client_ThisServer( )));
-			}
-		}
-		else
-		{
+		} else {
 			/* The connection is not fully established yet, so
 			 * we don't do the PING-PONG game here but instead
 			 * disconnect the client after "a short time" if it's
@@ -1245,7 +1322,9 @@ Check_Connections( void )
 
 			if (My_Connections[i].lastdata <
 			    time(NULL) - Conf_PongTimeout) {
-				LogDebug("Unregistered connection %d timed out ...", i);
+				LogDebug
+				    ("Unregistered connection %d timed out ...",
+				     i);
 				Conn_Close(i, NULL, "Timeout", false);
 			}
 		}
@@ -1272,7 +1351,7 @@ Check_Servers( void )
 		if( Conf_Server[i].group > NONE ) {
 			for (n = 0; n < MAX_SERVERS; n++) {
 				if (n == i) continue;
-				if ((Conf_Server[n].conn_id > NONE) &&
+				if ((Conf_Server[n].conn_id != NONE) &&
 					(Conf_Server[n].group == Conf_Server[i].group))
 						break;
 			}
@@ -1286,6 +1365,7 @@ Check_Servers( void )
 
 		/* Okay, try to connect now */
 		Conf_Server[i].lasttry = time_now;
+		Conf_Server[i].conn_id = SERVER_WAIT;
 		assert(Resolve_Getfd(&Conf_Server[i].res_stat) < 0);
 		Resolve_Name(&Conf_Server[i].res_stat, Conf_Server[i].host, cb_Connect_to_Server);
 	}
@@ -1293,36 +1373,19 @@ Check_Servers( void )
 
 
 static void
-New_Server( int Server )
+New_Server( int Server , struct in_addr *dest)
 {
 	/* Establish new server link */
-
+	struct sockaddr_in local_addr;
 	struct sockaddr_in new_addr;
-	struct in_addr inaddr;
 	int res, new_sock;
 	CLIENT *c;
 
 	assert( Server > NONE );
 
-	Log( LOG_INFO, "Establishing connection to \"%s\", %s, port %d ... ", Conf_Server[Server].host,
-							Conf_Server[Server].ip, Conf_Server[Server].port );
-
-#ifdef HAVE_INET_ATON
-	if( inet_aton( Conf_Server[Server].ip, &inaddr ) == 0 )
-#else
-	memset( &inaddr, 0, sizeof( inaddr ));
-	inaddr.s_addr = inet_addr( Conf_Server[Server].ip );
-	if( inaddr.s_addr == (unsigned)-1 )
-#endif
-	{
-		Log( LOG_ERR, "Can't connect to \"%s\": can't convert ip address %s!",
-				Conf_Server[Server].host, Conf_Server[Server].ip );
-		return;
-	}
-
-	memset( &new_addr, 0, sizeof( new_addr ));
+	memset(&new_addr, 0, sizeof( new_addr ));
 	new_addr.sin_family = AF_INET;
-	new_addr.sin_addr = inaddr;
+	new_addr.sin_addr = *dest;
 	new_addr.sin_port = htons( Conf_Server[Server].port );
 
 	new_sock = socket( PF_INET, SOCK_STREAM, 0 );
@@ -1333,15 +1396,24 @@ New_Server( int Server )
 
 	if( ! Init_Socket( new_sock )) return;
 
-	res = connect( new_sock, (struct sockaddr *)&new_addr, sizeof( new_addr ));
+	/* if we fail to bind, just continue and let connect() pick a source address */
+	InitSinaddr(&local_addr, 0);
+	local_addr.sin_addr = Conf_Server[Server].bind_addr;
+	if (bind(new_sock, (struct sockaddr *)&local_addr, (socklen_t)sizeof(local_addr)))
+		Log(LOG_WARNING, "Can't bind socket to %s!", Conf_ListenAddress, strerror( errno ));
+
+	res = connect(new_sock, (struct sockaddr *)&new_addr,
+			(socklen_t)sizeof(new_addr));
 	if(( res != 0 ) && ( errno != EINPROGRESS )) {
 		Log( LOG_CRIT, "Can't connect socket: %s!", strerror( errno ));
 		close( new_sock );
 		return;
 	}
-	
-	if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), new_sock)) {
-		Log( LOG_ALERT, "Cannot allocate memory for server connection (socket %d)", new_sock);
+
+	if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), (size_t)new_sock)) {
+		Log(LOG_ALERT,
+		    "Cannot allocate memory for server connection (socket %d)",
+		    new_sock);
 		close( new_sock );
 		return;
 	}
@@ -1366,6 +1438,7 @@ New_Server( int Server )
 	Conf_Server[Server].conn_id = new_sock;
 	My_Connections[new_sock].sock = new_sock;
 	My_Connections[new_sock].addr = new_addr;
+	My_Connections[new_sock].client = c;
 	strlcpy( My_Connections[new_sock].host, Conf_Server[Server].host,
 				sizeof(My_Connections[new_sock].host ));
 
@@ -1383,14 +1456,17 @@ New_Server( int Server )
 } /* New_Server */
 
 
+/**
+ * Initialize connection structure.
+ */
 static void
-Init_Conn_Struct( CONN_ID Idx )
+Init_Conn_Struct(CONN_ID Idx)
 {
-	time_t now = time( NULL );
-	/* Connection-Struktur initialisieren */
+	time_t now = time(NULL);
 
-	memset( &My_Connections[Idx], 0, sizeof ( CONNECTION ));
+	memset(&My_Connections[Idx], 0, sizeof(CONNECTION));
 	My_Connections[Idx].sock = -1;
+	My_Connections[Idx].signon = now;
 	My_Connections[Idx].lastdata = now;
 	My_Connections[Idx].lastprivmsg = now;
 	Resolve_Init(&My_Connections[Idx].res_stat);
@@ -1440,6 +1516,7 @@ cb_Connect_to_Server(int fd, UNUSED short events)
 	/* Read result of resolver sub-process from pipe and start connection */
 	int i;
 	size_t len;
+	struct in_addr dest_addr;
 	char readbuf[HOST_LEN + 1];
 
 	LogDebug("Resolver: Got forward lookup callback on fd %d, events %d", fd, events);
@@ -1448,7 +1525,7 @@ cb_Connect_to_Server(int fd, UNUSED short events)
 		  if (Resolve_Getfd(&Conf_Server[i].res_stat) == fd )
 			  break;
 	}
-	
+
 	if( i >= MAX_SERVERS) {
 		/* Ops, no matching server found?! */
 		io_close( fd );
@@ -1457,16 +1534,23 @@ cb_Connect_to_Server(int fd, UNUSED short events)
 	}
 
 	/* Read result from pipe */
-	len = Resolve_Read(&Conf_Server[i].res_stat, readbuf, sizeof readbuf -1);
+	len = Resolve_Read(&Conf_Server[i].res_stat, readbuf, sizeof(readbuf)-1);
 	if (len == 0)
 		return;
-	
+
 	readbuf[len] = '\0';
 	LogDebug("Got result from resolver: \"%s\" (%u bytes read).", readbuf, len);
-	strlcpy( Conf_Server[i].ip, readbuf, sizeof( Conf_Server[i].ip ));
 
+	if (!ngt_IPStrToBin(readbuf, &dest_addr)) {
+		Log(LOG_ERR, "Can't connect to \"%s\": can't convert ip address %s!",
+						Conf_Server[i].host, readbuf);
+		return;
+	}
+
+	Log( LOG_INFO, "Establishing connection to \"%s\", %s, port %d ... ",
+			Conf_Server[i].host, readbuf, Conf_Server[i].port );
 	/* connect() */
-	New_Server(i);
+	New_Server(i, &dest_addr);
 } /* cb_Read_Forward_Lookup */
 
 
@@ -1523,7 +1607,7 @@ cb_Read_Resolver_Result( int r_fd, UNUSED short events )
 	 * incoming connections.*/
 	assert ( My_Connections[i].sock >= 0 );
 	/* Incoming connection. Search client ... */
-	c = Client_GetFromConn( i );
+	c = Conn_GetClient( i );
 	assert( c != NULL );
 
 	/* Only update client information of unregistered clients */
@@ -1551,8 +1635,8 @@ cb_Read_Resolver_Result( int r_fd, UNUSED short events )
 static void
 Simple_Message( int Sock, const char *Msg )
 {
-	size_t len;
 	char buf[COMMAND_LEN];
+	size_t len;
 	/* Write "simple" message to socket, without using compression
 	 * or even the connection write buffers. Used e.g. for error
 	 * messages by New_Connection(). */
@@ -1561,7 +1645,6 @@ Simple_Message( int Sock, const char *Msg )
 
 	strlcpy( buf, Msg, sizeof buf - 2);
 	len = strlcat( buf, "\r\n", sizeof buf);
-	assert(len < COMMAND_LEN);
 	(void)write(Sock, buf, len);
 } /* Simple_Error */
 
@@ -1579,5 +1662,20 @@ Count_Connections( struct sockaddr_in addr_in )
 } /* Count_Connections */
 
 
+GLOBAL CLIENT *
+Conn_GetClient( CONN_ID Idx ) 
+{
+	/* return Client-Structure that belongs to the local Connection Idx.
+	 * If none is found, return NULL.
+	 */
+	CONNECTION *c;
+	assert( Idx >= 0 );
+
+	c = array_get(&My_ConnArray, sizeof (CONNECTION), (size_t)Idx);
+
+	assert(c != NULL);
+
+	return c ? c->client : NULL;
+}
 
 /* -eof- */