X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?p=ngircd-alex.git;a=blobdiff_plain;f=src%2Fngircd%2Fconn.c;h=b29ad7e353dbb5042d94db35f97798b0ef26bb07;hp=e460bb48e6a92aa16aa9dda036995bf8e0c9f16d;hb=4c113d8850dfc423e3dae2d2f90e7e9a9d42f0b0;hpb=b65358b17c8595b1616dc702bf93745dd5c75367

diff --git a/src/ngircd/conn.c b/src/ngircd/conn.c
index e460bb48..b29ad7e3 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
@@ -15,10 +15,9 @@
 #define CONN_MODULE
 
 #include "portab.h"
+#include "conf-ssl.h"
 #include "io.h"
 
-static char UNUSED id[] = "$Id: conn.c,v 1.183 2005/09/24 02:48:46 fw Exp $";
-
 #include "imp.h"
 #include <assert.h>
 #ifdef PROTOTYPES
@@ -41,12 +40,6 @@ static char UNUSED id[] = "$Id: conn.c,v 1.183 2005/09/24 02:48:46 fw Exp $";
 # include <netinet/ip.h>
 #endif
 
-#ifdef HAVE_ARPA_INET_H
-# include <arpa/inet.h>
-#else
-# define PF_INET AF_INET
-#endif
-
 #ifdef HAVE_STDINT_H
 # include <stdint.h>			/* e.g. for Mac OS X */
 #endif
@@ -66,6 +59,7 @@ static char UNUSED id[] = "$Id: conn.c,v 1.183 2005/09/24 02:48:46 fw Exp $";
 #include "ngircd.h"
 #include "client.h"
 #include "conf.h"
+#include "conn-ssl.h"
 #include "conn-zip.h"
 #include "conn-func.h"
 #include "log.h"
@@ -83,20 +77,22 @@ static char UNUSED id[] = "$Id: conn.c,v 1.183 2005/09/24 02:48:46 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 ));
-static bool Handle_Buffer PARAMS(( CONN_ID Idx ));
+static void Handle_Buffer PARAMS(( CONN_ID Idx ));
 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, CONN_ID Idx ));
-static void Simple_Message PARAMS(( int Sock, char *Msg ));
-static int Count_Connections PARAMS(( struct sockaddr_in addr ));
-static int NewListener PARAMS(( const UINT16 Port ));
+static void New_Server PARAMS(( int Server, ng_ipaddr_t *dest ));
+static void Simple_Message PARAMS(( int Sock, const char *Msg ));
+static int NewListener PARAMS(( const char *listen_addr, UINT16 Port ));
 
 static array My_Listeners;
+static array My_ConnArray;
+static size_t NumConnections;
 
 #ifdef TCPWRAP
 int allow_severity = LOG_INFO;
@@ -105,28 +101,50 @@ int deny_severity = LOG_ERR;
 
 static void server_login PARAMS((CONN_ID idx));
 
+#ifdef SSL_SUPPORT
+extern struct SSLOptions Conf_SSLOptions;
+static void cb_connserver_login_ssl PARAMS((int sock, short what));
+static void cb_clientserver_ssl PARAMS((int sock, short what));
+#endif
 static void cb_Read_Resolver_Result PARAMS(( int sock, UNUSED short what));
+static void cb_Connect_to_Server PARAMS(( int sock, UNUSED short what));
 static void cb_clientserver PARAMS((int sock, short what));
 
 static void
 cb_listen(int sock, short irrelevant)
 {
 	(void) irrelevant;
-	New_Connection( sock );
+	if (New_Connection( sock ) >= 0)
+		NumConnections++;
+	LogDebug("Total number of connections now %ld.", NumConnections);
 }
 
 
+#ifdef SSL_SUPPORT
+static void
+cb_listen_ssl(int sock, short irrelevant)
+{
+	int fd;
+	(void) irrelevant;
+	fd = New_Connection(sock);
+	if (fd < 0)
+		return;
+
+	NumConnections++;
+	LogDebug("Total number of connections now %ld.", NumConnections);
+	io_event_setcb(My_Connections[fd].sock, cb_clientserver_ssl);
+}
+#endif
+
+
 static void
 cb_connserver(int sock, UNUSED short what)
 {
 	int res, err;
 	socklen_t sock_len;
-	CLIENT *c;
 	CONN_ID idx = Socket2Index( sock );
 	if (idx <= NONE) {
-#ifdef DEBUG
-		Log(LOG_DEBUG, "cb_connserver wants to write on unknown socket?!");
-#endif
+		LogDebug("cb_connserver wants to write on unknown socket?!");
 		io_close(sock);
 		return;
 	}
@@ -138,28 +156,48 @@ cb_connserver(int sock, UNUSED short what)
 	res = getsockopt( My_Connections[idx].sock, SOL_SOCKET, SO_ERROR, &err, &sock_len );
 	assert( sock_len == sizeof( err ));
 
-	/* Fehler aufgetreten? */
-	if(( res != 0 ) || ( err != 0 )) {
-		if ( res != 0 ) 
-			Log( LOG_CRIT, "getsockopt (connection %d): %s!", idx, strerror( errno ));
-		else
-			Log( LOG_CRIT, "Can't connect socket to \"%s:%d\" (connection %d): %s!",
-				My_Connections[idx].host, Conf_Server[Conf_GetServer( idx )].port,
-										idx, strerror( err ));
-
-			/* Clean up socket, connection and client structures */
-			c = Client_GetFromConn( idx );
-			if( c ) Client_DestroyNow( c );
-			io_close( My_Connections[idx].sock );
-			Init_Conn_Struct( idx );
-
-			/* Bei Server-Verbindungen lasttry-Zeitpunkt auf "jetzt" setzen */
-			Conf_Server[Conf_GetServer( idx )].lasttry = time( NULL );
-			Conf_UnsetServer( idx );
+	/* Error while connecting? */
+ 	if ((res != 0) || (err != 0)) {
+ 		if (res != 0)
+ 			Log(LOG_CRIT, "getsockopt (connection %d): %s!",
+ 			    idx, strerror(errno));
+ 		else
+ 			Log(LOG_CRIT,
+ 			    "Can't connect socket to \"%s:%d\" (connection %d): %s!",
+ 			    My_Connections[idx].host,
+ 			    Conf_Server[Conf_GetServer(idx)].port,
+ 			    idx, strerror(err));
+
+		res = Conf_GetServer(idx);
+		assert(res >= 0);
+
+		Conn_Close(idx, "Can't connect!", NULL, false);
+
+		if (res < 0)
 			return;
+		if (ng_ipaddr_af(&Conf_Server[res].dst_addr[0])) {
+			/* more addresses to try... */
+			New_Server(res, &Conf_Server[res].dst_addr[0]);
+			/* connection to dst_addr[0] in progress, remove this address... */
+			Conf_Server[res].dst_addr[0] = Conf_Server[res].dst_addr[1];
+
+			memset(&Conf_Server[res].dst_addr[1], 0, sizeof(&Conf_Server[res].dst_addr[1]));
+		}
+		return;
 	}
 
+	res = Conf_GetServer(idx);
+	assert(res >= 0);
+	if (res >= 0) /* connect succeeded, remove all additional addresses */
+		memset(&Conf_Server[res].dst_addr, 0, sizeof(&Conf_Server[res].dst_addr));
 	Conn_OPTION_DEL( &My_Connections[idx], CONN_ISCONNECTING );
+#ifdef SSL_SUPPORT
+	if ( Conn_OPTION_ISSET( &My_Connections[idx], CONN_SSL_CONNECT )) {
+		io_event_setcb( sock, cb_connserver_login_ssl );
+		io_event_add( sock, IO_WANTWRITE|IO_WANTREAD );
+		return;
+	}
+#endif
 	server_login(idx);
 }
 
@@ -179,24 +217,88 @@ server_login(CONN_ID idx)
 }
 
 
+#ifdef SSL_SUPPORT
+static void
+cb_connserver_login_ssl(int sock, short unused)
+{
+	CONN_ID idx = Socket2Index(sock);
+
+	assert(idx >= 0);
+	if (idx < 0) {
+		io_close(sock);
+		return;
+	}
+	(void) unused;
+	switch (ConnSSL_Connect( &My_Connections[idx])) {
+	case 1: break;
+	case 0: LogDebug("ConnSSL_Connect: not ready");
+		return;
+	case -1:
+		Log(LOG_INFO, "SSL connection on socket %d failed", sock);
+		Conn_Close(idx, "Can't connect!", NULL, false);
+		return;
+	}
+
+	Log( LOG_INFO, "SSL Connection %d with \"%s:%d\" established.", idx,
+			My_Connections[idx].host, Conf_Server[Conf_GetServer( idx )].port );
+
+	server_login(idx);
+}
+#endif
+
+
 static void
 cb_clientserver(int sock, short what)
 {
-	CONN_ID idx = Socket2Index( sock );
-	if (idx <= NONE) {
-#ifdef DEBUG
-		Log(LOG_WARNING, "WTF: cb_clientserver wants to write on unknown socket?!");
+	CONN_ID idx = Socket2Index(sock);
+
+	assert(idx >= 0);
+
+	if (idx < 0) {
+		io_close(sock);
+		return;
+	}
+#ifdef SSL_SUPPORT
+	if (what & IO_WANTREAD || (Conn_OPTION_ISSET(&My_Connections[idx], CONN_SSL_WANT_WRITE)))
+		Read_Request( idx ); /* if TLS layer needs to write additional data, call Read_Request instead so SSL/TLS can continue */
+#else
+	if (what & IO_WANTREAD)
+		Read_Request( idx );
 #endif
+	if (what & IO_WANTWRITE)
+		Handle_Write( idx );
+}
+
+
+#ifdef SSL_SUPPORT
+static void
+cb_clientserver_ssl(int sock, short what)
+{
+	CONN_ID idx = Socket2Index(sock);
+
+	assert(idx >= 0);
+
+	if (idx < 0) {
 		io_close(sock);
 		return;
 	}
 
+	switch (ConnSSL_Accept(&My_Connections[idx])) {
+		case 1: break;	/* OK */
+		case 0: return; /* EAGAIN: this callback will be invoked again by the io layer */
+		default:
+			Conn_Close( idx, "Socket closed!", "SSL accept error", false );
+			return;
+	}
 	if (what & IO_WANTREAD)
-		Read_Request( idx );
+		Read_Request(idx);
 
 	if (what & IO_WANTWRITE)
-		Handle_Write( idx );
+		Handle_Write(idx);
+
+	io_event_setcb(sock, cb_clientserver);	/* SSL handshake completed */
 }
+#endif
 
 
 GLOBAL void
@@ -208,26 +310,25 @@ Conn_Init( void )
 
 	/* Speicher fuer Verbindungs-Pool anfordern */
 	Pool_Size = CONNECTION_POOL;
-	if( Conf_MaxConnections > 0 )
-	{
-		/* konfiguriertes Limit beachten */
-		if( Pool_Size > Conf_MaxConnections ) Pool_Size = Conf_MaxConnections;
-	}
-	My_Connections = (CONNECTION *) calloc( Pool_Size,  sizeof( CONNECTION ) );
-	if( ! My_Connections )
-	{
-		/* Speicher konnte nicht alloziert werden! */
+	if ((Conf_MaxConnections > 0) &&
+		(Pool_Size > Conf_MaxConnections))
+			Pool_Size = Conf_MaxConnections;
+
+	if (!array_alloc(&My_ConnArray, sizeof(CONNECTION), (size_t)Pool_Size)) {
 		Log( LOG_EMERG, "Can't allocate memory! [Conn_Init]" );
 		exit( 1 );
 	}
-#ifdef DEBUG
-	Log( LOG_DEBUG, "Allocated connection pool for %d items (%ld bytes).", Pool_Size, sizeof( CONNECTION ) * Pool_Size );
-#endif
 
-	array_free( &My_Listeners );
+	/* FIXME: My_Connetions/Pool_Size is needed by other parts of the
+	 * code; remove them! */
+	My_Connections = (CONNECTION*) array_start(&My_ConnArray);
 
-	/* Groesster File-Descriptor fuer select() */
-	Conn_MaxFD = 0;
+	LogDebug("Allocated connection pool for %d items (%ld bytes).",
+		array_length(&My_ConnArray, sizeof( CONNECTION )), array_bytes(&My_ConnArray));
+
+	assert( array_length(&My_ConnArray, sizeof( CONNECTION )) >= (size_t) Pool_Size);
+	
+	array_free( &My_Listeners );
 
 	/* Connection-Struktur initialisieren */
 	for( i = 0; i < Pool_Size; i++ ) Init_Conn_Struct( i );
@@ -245,9 +346,7 @@ Conn_Exit( void )
 
 	CONN_ID idx;
 
-#ifdef DEBUG
-	Log( LOG_DEBUG, "Shutting down all connections ..." );
-#endif
+	LogDebug("Shutting down all connections ..." );
 
 	Conn_ExitListeners();
 
@@ -256,11 +355,10 @@ Conn_Exit( void )
 		if( My_Connections[idx].sock > NONE ) {
 			Conn_Close( idx, NULL, NGIRCd_SignalRestart ?
 				"Server going down (restarting)":"Server going down", true );
-			continue;
 		}
 	}
 
-	free( My_Connections );
+	array_free(&My_ConnArray);
 	My_Connections = NULL;
 	Pool_Size = 0;
 	io_library_shutdown();
@@ -268,23 +366,24 @@ Conn_Exit( void )
 
 
 static unsigned int
-ports_initlisteners(array *a, void (*func)(int,short))
+ports_initlisteners(array *a, const char *listen_addr, void (*func)(int,short))
 {
-	unsigned int created = 0, len;
+	unsigned int created = 0;
+	size_t len;
 	int fd;
 	UINT16 *port;
 
 	len = array_length(a, sizeof (UINT16));
 	port = array_start(a);
-	while(len--) {
-		fd = NewListener( *port );
+	while (len--) {
+		fd = NewListener(listen_addr, *port);
 		if (fd < 0) {
 			port++;
 			continue;
 		}
 		if (!io_event_create( fd, IO_WANTREAD, func )) {
 			Log( LOG_ERR, "io_event_create(): Could not add listening fd %d (port %u): %s!",
-							fd, (unsigned int) *port, strerror(errno));
+						fd, (unsigned int) *port, strerror(errno));
 			close(fd);
 			port++;
 			continue;
@@ -292,25 +391,51 @@ ports_initlisteners(array *a, void (*func)(int,short))
 		created++;
 		port++;
 	}
-
 	return created;
 }
 
 
-GLOBAL int
+GLOBAL unsigned int
 Conn_InitListeners( void )
 {
 	/* Initialize ports on which the server should accept connections */
-
-	unsigned int created;
+	unsigned int created = 0;
+	char *copy, *listen_addr;
 
 	if (!io_library_init(CONNECTION_POOL)) {
 		Log(LOG_EMERG, "Cannot initialize IO routines: %s", strerror(errno));
 		return -1;
 	}
 
-	created = ports_initlisteners(&Conf_ListenPorts, cb_listen);
+	assert(Conf_ListenAddress);
+
+	/* can't use Conf_ListenAddress directly, see below */
+	copy = strdup(Conf_ListenAddress);
+	if (!copy) {
+		Log(LOG_CRIT, "Cannot copy %s: %s", Conf_ListenAddress, strerror(errno));
+		return 0;
+	}
+	listen_addr = strtok(copy, ",");
+
+	while (listen_addr) {
+		ngt_TrimStr(listen_addr);
+		if (*listen_addr) {
+			created += ports_initlisteners(&Conf_ListenPorts, listen_addr, cb_listen);
+#ifdef SSL_SUPPORT
+			created += ports_initlisteners(&Conf_SSLOptions.ListenPorts, listen_addr, cb_listen_ssl);
+#endif
+		}
+
+		listen_addr = strtok(NULL, ",");
+	}
 
+	/*
+	 * can't free() Conf_ListenAddress here. On /REHASH, if the config file
+	 * cannot be re-loaded, we'd end up with a NULL Conf_ListenAddress.
+	 * Instead, free() takes place in conf.c, before the config file
+	 * is being parsed.
+	 */
+	free(copy);
 	return created;
 } /* Conn_InitListeners */
 
@@ -329,64 +454,78 @@ 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);
-#ifdef DEBUG
-		Log( LOG_DEBUG, "Listening socket %d closed.", *fd );
-#endif
+		LogDebug("Listening socket %d closed.", *fd );
 		fd++;
 	}
 	array_free(&My_Listeners);
 } /* Conn_ExitListeners */
 
 
+static bool
+InitSinaddrListenAddr(ng_ipaddr_t *addr, const char *listen_addrstr, UINT16 Port)
+{
+	bool ret;
+
+	ret = ng_ipaddr_init(addr, listen_addrstr, Port);
+	if (!ret) {
+		assert(listen_addrstr);
+		Log(LOG_CRIT, "Can't bind to [%s]:%u: can't convert ip address \"%s\"",
+						listen_addrstr, Port, listen_addrstr);
+	}
+	return ret;
+}
+
+
+static void
+set_v6_only(int af, int sock)
+{
+#if defined(IPV6_V6ONLY) && defined(WANT_IPV6)
+	int on = 1;
+
+	if (af != AF_INET6)
+		return;
+
+	if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on)))
+		Log(LOG_ERR, "Could not set IPV6_V6ONLY: %s", strerror(errno));
+#else
+	(void)af;
+	(void)sock;
+#endif
+}
+
+
 /* return new listening port file descriptor or -1 on failure */
 static int
-NewListener( const UINT16 Port )
+NewListener(const char *listen_addr, UINT16 Port)
 {
 	/* Create new listening socket on specified port */
-
-	struct sockaddr_in addr;
-	struct in_addr inaddr;
-	int sock;
+	ng_ipaddr_t addr;
+	int sock, af;
 #ifdef ZEROCONF
 	char name[CLIENT_ID_LEN], *info;
 #endif
+	if (!InitSinaddrListenAddr(&addr, listen_addr, Port))
+		return -1;
 
-	/* Server-"Listen"-Socket initialisieren */
-	memset( &addr, 0, sizeof( addr ));
-	memset( &inaddr, 0, sizeof( inaddr ));
-	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);
+	af = ng_ipaddr_af(&addr);
+	sock = socket(af, SOCK_STREAM, 0);
 	if( sock < 0 ) {
-		Log( LOG_CRIT, "Can't create socket: %s!", strerror( errno ));
+		Log(LOG_CRIT, "Can't create socket (af %d) : %s!", af, strerror(errno));
 		return -1;
 	}
 
-	if( ! Init_Socket( sock )) return -1;
+	set_v6_only(af, sock);
 
-	if( bind( sock, (struct sockaddr *)&addr, (socklen_t)sizeof( addr )) != 0 ) {
-		Log( LOG_CRIT, "Can't bind socket: %s!", strerror( errno ));
-		close( sock );
+	if (!Init_Socket(sock))
+		return -1;
+
+	if (bind(sock, (struct sockaddr *)&addr, ng_ipaddr_salen(&addr)) != 0) {
+		Log(LOG_CRIT, "Can't bind socket to address %s:%d - %s",
+			ng_ipaddr_tostr(&addr), Port, strerror(errno));
+		close(sock);
 		return -1;
 	}
 
@@ -403,8 +542,7 @@ NewListener( const UINT16 Port )
 		return -1;
 	}
 
-	if( Conf_ListenAddress[0]) Log( LOG_INFO, "Now listening on %s:%d (socket %d).", Conf_ListenAddress, Port, sock );
-	else Log( LOG_INFO, "Now listening on 0.0.0.0:%d (socket %d).", Port, sock );
+	Log(LOG_INFO, "Now listening on [%s]:%d (socket %d).", ng_ipaddr_tostr(&addr), Port, sock);
 
 #ifdef ZEROCONF
 	/* Get best server description text */
@@ -427,8 +565,11 @@ 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 );
@@ -436,103 +577,157 @@ NewListener( const UINT16 Port )
 	return sock;
 } /* NewListener */
 
+#ifdef SSL_SUPPORT
+/*
+ * SSL/TLS connections require extra treatment:
+ * When either CONN_SSL_WANT_WRITE or CONN_SSL_WANT_READ is set, we
+ * need to take care of that first, before checking read/write buffers.
+ * For instance, while we might have data in our write buffer, the
+ * TLS/SSL protocol might need to read internal data first for TLS/SSL
+ * writes to succeed.
+ *
+ * If this function returns true, such a condition is met and we have
+ * to reverse the condition (check for read even if we've data to write,
+ * do not check for read but writeability even if write-buffer is empty).
+ */
+static bool
+SSL_WantRead(const CONNECTION *c)
+{
+	if (Conn_OPTION_ISSET(c, CONN_SSL_WANT_READ)) {
+		io_event_add(c->sock, IO_WANTREAD);
+		return true;
+	}
+	return false;
+}
+static bool
+SSL_WantWrite(const CONNECTION *c)
+{
+	if (Conn_OPTION_ISSET(c, CONN_SSL_WANT_WRITE)) {
+		io_event_add(c->sock, IO_WANTWRITE);
+		return true;
+	}
+	return false;
+}
+#else
+static inline bool
+SSL_WantRead(UNUSED const CONNECTION *c) { return false; }
+static inline bool
+SSL_WantWrite(UNUSED const CONNECTION *c) { return false; }
+#endif
+
 
+/**
+ * "Main Loop": Loop until shutdown or restart is signalled.
+ * This function loops until a shutdown or restart of ngIRCd is signalled and
+ * calls io_dispatch() to check for readable and writable sockets every second.
+ * It checks for status changes on pending connections (e. g. when a hostname
+ * has been resolved), checks for "penalties" and timeouts, and handles the
+ * input buffers.
+ */
 GLOBAL void
-Conn_Handler( void )
+Conn_Handler(void)
 {
-	/* "Main Loop.": Loop until a signal (for shutdown or restart) arrives.
-	 * Call io_dispatch() to check for read/writeable sockets every second
-	 * Wait for status change on pending connections (e.g: when the hostname has been resolved)
-	 * check for penalty/timeouts
-	 * handle input buffers
-	 */
 	int i;
 	unsigned int wdatalen;
 	struct timeval tv;
 	time_t t;
-	bool timeout;
 
-	while(( ! NGIRCd_SignalQuit ) && ( ! NGIRCd_SignalRestart )) {
-		timeout = true;
+	while (!NGIRCd_SignalQuit && !NGIRCd_SignalRestart) {
+		t = time(NULL);
 
 #ifdef ZEROCONF
-		Rendezvous_Handler( );
+		Rendezvous_Handler();
 #endif
 
 		/* Should the configuration be reloaded? */
-		if( NGIRCd_SignalRehash ) NGIRCd_Rehash( );
+		if (NGIRCd_SignalRehash)
+			NGIRCd_Rehash();
 
 		/* Check configured servers and established links */
-		Check_Servers( );
-		Check_Connections( );
-
-		t = time( NULL );
-
-		/* noch volle Lese-Buffer suchen */
-		for( i = 0; i < Pool_Size; i++ ) {
-			if(( My_Connections[i].sock > NONE ) && ( array_bytes(&My_Connections[i].rbuf) > 0 ) &&
-			 ( My_Connections[i].delaytime < t ))
-			{
-				/* Kann aus dem Buffer noch ein Befehl extrahiert werden? */
-				if (Handle_Buffer( i )) timeout = false;
+		Check_Servers();
+		Check_Connections();
+
+		/* Look for non-empty read buffers ... */
+		for (i = 0; i < Pool_Size; i++) {
+			if ((My_Connections[i].sock > NONE)
+			    && (array_bytes(&My_Connections[i].rbuf) > 0)
+			    && (My_Connections[i].delaytime < t)) {
+				/* ... and try to handle the received data */
+				Handle_Buffer(i);
 			}
 		}
 
-		/* noch volle Schreib-Puffer suchen */
-		for( i = 0; i < Pool_Size; i++ ) {
-			if ( My_Connections[i].sock <= NONE )
+		/* Look for non-empty write buffers ... */
+		for (i = 0; i < Pool_Size; i++) {
+			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 ))
+			if (wdatalen > 0 ||
+			    array_bytes(&My_Connections[i].zip.wbuf) > 0)
 #else
-			if ( wdatalen > 0 )
+			if (wdatalen > 0)
 #endif
 			{
-				/* Socket der Verbindung in Set aufnehmen */
-				io_event_add( My_Connections[i].sock, IO_WANTWRITE );
+				if (SSL_WantRead(&My_Connections[i]))
+					continue;
+				io_event_add(My_Connections[i].sock,
+					     IO_WANTWRITE);
 			}
 		}
 
-		/* von welchen Sockets koennte gelesen werden? */
-		for (i = 0; i < Pool_Size; i++ ) {
-			if ( My_Connections[i].sock <= NONE )
+		/* Check from which sockets we possibly could read ... */
+		for (i = 0; i < Pool_Size; i++) {
+			if (My_Connections[i].sock <= NONE)
 				continue;
-
+#ifdef SSL_SUPPORT
+			if (SSL_WantWrite(&My_Connections[i]))
+				continue; /* TLS/SSL layer needs to write data; deal with this first */
+#endif
 			if (Resolve_INPROGRESS(&My_Connections[i].res_stat)) {
-				/* wait for completion of Resolver Sub-Process */
-				io_event_del( My_Connections[i].sock, IO_WANTREAD );
+				/* Wait for completion of resolver sub-process ... */
+				io_event_del(My_Connections[i].sock,
+					     IO_WANTREAD);
 				continue;
 			}
 
-			if ( Conn_OPTION_ISSET( &My_Connections[i], CONN_ISCONNECTING ))
-				continue;	/* wait for completion of connect() */
+			if (Conn_OPTION_ISSET(&My_Connections[i], CONN_ISCONNECTING))
+				/* Wait for completion of connect() ... */
+				continue;
 
-			if( My_Connections[i].delaytime > t ) {
-				/* Fuer die Verbindung ist eine "Penalty-Zeit" gesetzt */
-				io_event_del( My_Connections[i].sock, IO_WANTREAD );
+			if (My_Connections[i].delaytime > t) {
+				/* There is a "penalty time" set: ignore socket! */
+				io_event_del(My_Connections[i].sock,
+					     IO_WANTREAD);
 				continue;
 			}
-			io_event_add( My_Connections[i].sock, IO_WANTREAD );
+			io_event_add(My_Connections[i].sock, IO_WANTREAD);
 		}
 
-		/* (re-)set timeout - tv_sec/usec are undefined after io_dispatch() returns */
+		/* Set the timeout for reading from the network to 1 second,
+		 * which is the granularity with witch we handle "penalty
+		 * times" for example.
+		 * Note: tv_sec/usec are undefined(!) after io_dispatch()
+		 * returns, so we have to set it beforce each call to it! */
 		tv.tv_usec = 0;
-		tv.tv_sec = timeout ? 1 : 0;
-
-		/* wait for activity */
-		i = io_dispatch( &tv );
-		if (i == -1 && errno != EINTR ) {
-			Log(LOG_EMERG, "Conn_Handler(): io_dispatch(): %s!", strerror(errno));
-			Log(LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME);
-			exit( 1 );
+		tv.tv_sec = 1;
+
+		/* Wait for activity ... */
+		i = io_dispatch(&tv);
+		if (i == -1 && errno != EINTR) {
+			Log(LOG_EMERG, "Conn_Handler(): io_dispatch(): %s!",
+			    strerror(errno));
+			Log(LOG_ALERT, "%s exiting due to fatal errors!",
+			    PACKAGE_NAME);
+			exit(1);
 		}
 	}
 
-	if( NGIRCd_SignalQuit ) Log( LOG_NOTICE|LOG_snotice, "Server going down NOW!" );
-	else if( NGIRCd_SignalRestart ) Log( LOG_NOTICE|LOG_snotice, "Server restarting NOW!" );
+	if (NGIRCd_SignalQuit)
+		Log(LOG_NOTICE | LOG_snotice, "Server going down NOW!");
+	else if (NGIRCd_SignalRestart)
+		Log(LOG_NOTICE | LOG_snotice, "Server restarting NOW!");
 } /* Conn_Handler */
 
 
@@ -557,6 +752,7 @@ va_dcl
 #endif
 {
 	char buffer[COMMAND_LEN];
+	size_t len;
 	bool ok;
 	va_list ap;
 
@@ -601,8 +797,8 @@ va_dcl
 		Log(LOG_DEBUG, " -> connection %d: '%s'.", Idx, buffer);
 #endif
 
-	strlcat( buffer, "\r\n", sizeof( buffer ));
-	ok = Conn_Write( Idx, buffer, strlen( buffer ));
+	len = strlcat( buffer, "\r\n", sizeof( buffer ));
+	ok = Conn_Write(Idx, buffer, len);
 	My_Connections[Idx].msg_out++;
 
 	va_end( ap );
@@ -610,54 +806,74 @@ 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. */
-	if( My_Connections[Idx].sock <= NONE )
-	{
-#ifdef DEBUG
-		Log( LOG_DEBUG, "Skipped write on closed socket (connection %d).", Idx );
-#endif
-		return false;
-	}
+	c = Conn_GetClient(Idx);
+	assert( c != NULL);
 
-	/* 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;
+	/* 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;
 
-		/* 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;
-		}
+	/* 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);
+		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;
@@ -679,6 +895,7 @@ Conn_Close( CONN_ID Idx, char *LogMsg, char *FwdMsg, bool InformClient )
 	CLIENT *c;
 	char *txt;
 	double in_k, out_k;
+	UINT16 port;
 #ifdef ZLIB
 	double in_z_k, out_z_k;
 	int in_p, out_p;
@@ -690,9 +907,7 @@ Conn_Close( CONN_ID Idx, char *LogMsg, char *FwdMsg, bool InformClient )
 	if( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ISCLOSING )) {
 		/* Conn_Close() has been called recursively for this link;
 		 * probabe reason: Handle_Write() failed  -- see below. */
-#ifdef DEBUG
-		Log( LOG_DEBUG, "Recursive request to close connection: %d", Idx );
-#endif
+		LogDebug("Recursive request to close connection: %d", Idx );
 		return;
 	}
 
@@ -700,15 +915,20 @@ 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";
+
+	port = ng_ipaddr_getport(&My_Connections[Idx].addr);
+	Log(LOG_INFO, "Shutting down connection %d (%s) with %s:%d ...", Idx,
+	    LogMsg ? LogMsg : FwdMsg, My_Connections[Idx].host, port);
 
 	/* Search client, if any */
-	c = Client_GetFromConn( Idx );
+	c = Conn_GetClient( Idx );
 
 	/* Should the client be informed? */
 	if (InformClient) {
@@ -723,7 +943,6 @@ 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);
@@ -731,43 +950,70 @@ Conn_Close( CONN_ID Idx, char *LogMsg, char *FwdMsg, bool InformClient )
 			Conn_WriteStr(Idx, "ERROR :Closing connection.");
 	}
 
-	/* Try to write out the write buffer */
+	/* Try to write out the write buffer. Note: Handle_Write() eventually
+	 * removes the CLIENT structure associated with this connection if an
+	 * error occurs! So we have to re-check if there is still an valid
+	 * CLIENT structure after calling Handle_Write() ...*/
 	(void)Handle_Write( Idx );
 
+	/* Search client, if any (re-check!) */
+	c = Conn_GetClient( Idx );
+#ifdef SSL_SUPPORT
+	if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_SSL )) {
+		Log( LOG_INFO, "SSL Connection %d shutting down", Idx );
+		ConnSSL_Free(&My_Connections[Idx]);
+	}
+#endif
 	/* 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,
+		    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, 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, 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 );
@@ -784,12 +1030,15 @@ 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 );
 
-#ifdef DEBUG
-	Log( LOG_DEBUG, "Shutdown of connection %d completed.", Idx );
-#endif
+	assert(NumConnections > 0);
+	if (NumConnections)
+		NumConnections--;
+	LogDebug("Shutdown of connection %d completed, %ld connection%s left.",
+		 Idx, NumConnections, NumConnections != 1 ? "s" : "");
 } /* Conn_Close */
 
 
@@ -803,13 +1052,13 @@ Conn_SyncServerStruct( void )
 	CONN_ID i;
 	int c;
 
-	for( i = 0; i < Pool_Size; i++ )
-	{
+	for( i = 0; i < Pool_Size; i++ ) {
 		/* Established connection? */
-		if( My_Connections[i].sock <= NONE ) continue;
+		if (My_Connections[i].sock < 0)
+			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++ )
@@ -818,58 +1067,62 @@ Conn_SyncServerStruct( void )
 			if( ! Conf_Server[c].host[0] ) continue;
 
 			/* Duplicate? */
-			if( strcmp( Conf_Server[c].name, Client_ID( client )) == 0 ) Conf_Server[c].conn_id = i;
+			if( strcmp( Conf_Server[c].name, Client_ID( client )) == 0 )
+				Conf_Server[c].conn_id = i;
 		}
 	}
 } /* 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 ) {
-#ifdef DEBUG
-		Log(LOG_DEBUG,
-		    "Handle_Write() on closed socket, connection %d", Idx);
-#endif
+		LogDebug("Handle_Write() on closed socket, connection %d", Idx);
 		return false;
 	}
 	assert( My_Connections[Idx].sock > NONE );
 
-#ifdef DEBUG
-	Log(LOG_DEBUG, "Handle_Write() called for connection %d ...", Idx);
-#endif
-
 	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);
 
-	len = write(My_Connections[Idx].sock,
-	            array_start(&My_Connections[Idx].wbuf), wdatalen );
+	LogDebug
+	    ("Handle_Write() called for connection %d, %ld bytes pending ...",
+	     Idx, wdatalen);
 
+#ifdef SSL_SUPPORT
+	if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_SSL )) {
+		len = ConnSSL_Write(&My_Connections[Idx], array_start(&My_Connections[Idx].wbuf), wdatalen);
+	} else
+#endif
+	{
+		len = write(My_Connections[Idx].sock,
+			    array_start(&My_Connections[Idx].wbuf), wdatalen );
+	}
 	if( len < 0 ) {
 		if (errno == EAGAIN || errno == EINTR)
 			return true;
@@ -881,12 +1134,28 @@ 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 */
 
 
+static int
+Count_Connections(ng_ipaddr_t *a)
+{
+	int i, cnt;
+
+	cnt = 0;
+	for (i = 0; i < Pool_Size; i++) {
+		if (My_Connections[i].sock <= NONE)
+			continue;
+		if (ng_ipaddr_ipequal(&My_Connections[i].addr, a))
+			cnt++;
+	}
+	return cnt;
+} /* Count_Connections */
+
+
 static int
 New_Connection( int Sock )
 {
@@ -896,20 +1165,27 @@ New_Connection( int Sock )
 #ifdef TCPWRAP
 	struct request_info req;
 #endif
-	struct sockaddr_in new_addr;
-	int new_sock, new_sock_len;
-	CONN_ID idx;
+	ng_ipaddr_t new_addr;
+	char ip_str[NG_INET_ADDRSTRLEN];
+	int new_sock, new_sock_len, identsock;
 	CLIENT *c;
-	POINTER *ptr;
-	long new_size, cnt;
+	long cnt;
 
 	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;
+	}
+
+	if (!ng_ipaddr_tostr_r(&new_addr, ip_str)) {
+		Log(LOG_CRIT, "fd %d: Can't convert IP address!", new_sock);
+		Simple_Message(new_sock, "ERROR :Internal Server Error");
+		close(new_sock);
 		return -1;
 	}
 
@@ -917,10 +1193,8 @@ New_Connection( int Sock )
 	/* Validate socket using TCP Wrappers */
 	request_init( &req, RQ_DAEMON, PACKAGE_NAME, RQ_FILE, new_sock, RQ_CLIENT_SIN, &new_addr, NULL );
 	fromhost(&req);
-	if( ! hosts_access( &req ))
-	{
-		/* Access denied! */
-		Log( deny_severity, "Refused connection from %s (by TCP Wrappers)!", inet_ntoa( new_addr.sin_addr ));
+	if (!hosts_access(&req)) {
+		Log (deny_severity, "Refused connection from %s (by TCP Wrappers)!", ip_str);
 		Simple_Message( new_sock, "ERROR :Connection refused" );
 		close( new_sock );
 		return -1;
@@ -928,104 +1202,83 @@ New_Connection( int Sock )
 #endif
 
 	/* Socket initialisieren */
-	Init_Socket( new_sock );
-	
+	if (!Init_Socket( new_sock ))
+		return -1;
+
 	/* Check IP-based connection limit */
-	cnt = Count_Connections( new_addr );
-	if(( Conf_MaxConnectionsIP > 0 ) && ( cnt >= Conf_MaxConnectionsIP ))
-	{
+	cnt = Count_Connections(&new_addr);
+	if ((Conf_MaxConnectionsIP > 0) && (cnt >= Conf_MaxConnectionsIP)) {
 		/* Access denied, too many connections from this IP address! */
-		Log( LOG_ERR, "Refused connection from %s: too may connections (%ld) from this IP address!", inet_ntoa( new_addr.sin_addr ), cnt);
+		Log( LOG_ERR, "Refused connection from %s: too may connections (%ld) from this IP address!", ip_str, cnt);
 		Simple_Message( new_sock, "ERROR :Connection refused, too many connections from your IP address!" );
 		close( new_sock );
 		return -1;
 	}
 
-	/* Freie Connection-Struktur suchen */
-	for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == NONE ) break;
-	if( idx >= Pool_Size )
+	if ((Conf_MaxConnections > 0) &&
+		(NumConnections >= (size_t) Conf_MaxConnections))
 	{
-		new_size = Pool_Size + CONNECTION_POOL;
-
-		/* Im bisherigen Pool wurde keine freie Connection-Struktur mehr gefunden.
-		 * Wenn erlaubt und moeglich muss nun der Pool vergroessert werden: */
-
-		if( Conf_MaxConnections > 0 )
-		{
-			/* Es ist ein Limit konfiguriert */
-			if( Pool_Size >= Conf_MaxConnections )
-			{
-				/* Mehr Verbindungen duerfen wir leider nicht mehr annehmen ... */
-				Log( LOG_ALERT, "Can't accept connection: limit (%d) reached!", Pool_Size );
-				Simple_Message( new_sock, "ERROR :Connection limit reached" );
-				close( new_sock );
-				return -1;
-			}
-			if( new_size > Conf_MaxConnections ) new_size = Conf_MaxConnections;
-		}
-		if( new_size < Pool_Size )
-		{
-			Log( LOG_ALERT, "Can't accept connection: limit (%d) reached -- overflow!", Pool_Size );
-			Simple_Message( new_sock, "ERROR :Connection limit reached" );
-			close( new_sock );
-			return -1;
-		}
+		Log( LOG_ALERT, "Can't accept connection: limit (%d) reached!", Conf_MaxConnections);
+		Simple_Message( new_sock, "ERROR :Connection limit reached" );
+		close( new_sock );
+		return -1;
+	}
 
-		ptr = (POINTER *)realloc( My_Connections, sizeof( CONNECTION ) * new_size );
-		if( ! ptr ) {
+	if( new_sock >= Pool_Size ) {
+		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 );
 			return -1;
 		}
-
-#ifdef DEBUG
-		Log( LOG_DEBUG, "Allocated new connection pool for %ld items (%ld bytes). [realloc()]", new_size, sizeof( CONNECTION ) * new_size );
-#endif
+		LogDebug("Bumped connection pool to %ld items (internal: %ld items, %ld bytes)",
+			new_sock, array_length(&My_ConnArray, sizeof(CONNECTION)), array_bytes(&My_ConnArray));
 
 		/* Adjust pointer to new block */
-		My_Connections = (CONNECTION *)ptr;
-
-		/* Initialize new items */
-		for( idx = Pool_Size; idx < new_size; idx++ ) Init_Conn_Struct( idx );
-		idx = Pool_Size;
-
-		/* Adjust new pool size */
-		Pool_Size = new_size;
+		My_Connections = array_start(&My_ConnArray);
+		while (Pool_Size <= new_sock)
+			Init_Conn_Struct(Pool_Size++);
 	}
 
-	/* Client-Struktur initialisieren */
-	c = Client_NewLocal( idx, 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 );
+	/* 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;
 	}
 
-	/* Verbindung registrieren */
-	Init_Conn_Struct( idx );
-	My_Connections[idx].sock = new_sock;
-	My_Connections[idx].addr = new_addr;
-
-	/* Neuen Socket registrieren */
-	if (!io_event_create( new_sock, IO_WANTREAD, cb_clientserver)) {
-		Simple_Message( new_sock, "ERROR :Internal error" );
-		Conn_Close( idx, "io_event_create() failed", NULL, false );
+	c = Client_NewLocal(new_sock, ip_str, CLIENT_UNKNOWN, false );
+	if( ! c ) {
+		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;
 	}
 
-	Log( LOG_INFO, "Accepted connection %d from %s:%d on socket %d.", idx, inet_ntoa( new_addr.sin_addr ), ntohs( new_addr.sin_port), Sock );
+	Init_Conn_Struct( new_sock );
+	My_Connections[new_sock].sock = new_sock;
+	My_Connections[new_sock].addr = new_addr;
+	My_Connections[new_sock].client = c;
+
+	Log( LOG_INFO, "Accepted connection %d from %s:%d on socket %d.", new_sock,
+			ip_str, ng_ipaddr_getport(&new_addr), Sock);
 
 	/* Hostnamen ermitteln */
-	strlcpy( My_Connections[idx].host, inet_ntoa( new_addr.sin_addr ), sizeof( My_Connections[idx].host ));
-	Client_SetHostname( c, My_Connections[idx].host );
+	strlcpy(My_Connections[new_sock].host, ip_str, sizeof(My_Connections[new_sock].host));
 
-	Resolve_Addr(&My_Connections[idx].res_stat, &new_addr,
-		My_Connections[idx].sock, cb_Read_Resolver_Result);
+	Client_SetHostname(c, My_Connections[new_sock].host);
 
-	/* Penalty-Zeit setzen */
-	Conn_SetPenalty( idx, 4 );
+	identsock = new_sock;
+#ifdef IDENTAUTH
+	if (Conf_NoIdent)
+		identsock = -1;
+#endif
+	if (!Conf_NoDNS)
+		Resolve_Addr(&My_Connections[new_sock].res_stat, &new_addr,
+			     identsock, cb_Read_Resolver_Result);
+	Conn_SetPenalty(new_sock, 4);
 	return new_sock;
 } /* New_Connection */
 
@@ -1035,80 +1288,86 @@ Socket2Index( int Sock )
 {
 	/* zum Socket passende Connection suchen */
 
-	CONN_ID idx;
-
-	assert( Sock > NONE );
-
-	for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == Sock ) break;
+	assert( Sock >= 0 );
 
-	if( idx >= Pool_Size )
-	{
+	if( Sock >= Pool_Size || My_Connections[Sock].sock != Sock ) {
 		/* die Connection wurde vermutlich (wegen eines
 		 * Fehlers) bereits wieder abgebaut ... */
-#ifdef DEBUG
-		Log( LOG_DEBUG, "Socket2Index: can't get connection for socket %d!", Sock );
-#endif
+		LogDebug("Socket2Index: can't get connection for socket %d!", Sock);
 		return NONE;
 	}
-	else return idx;
+	return 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 );
+#ifdef SSL_SUPPORT
+	if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_SSL))
+		len = ConnSSL_Read( &My_Connections[Idx], readbuf, sizeof(readbuf));
+	else
+#endif
+	len = read(My_Connections[Idx].sock, readbuf, sizeof(readbuf));
+	if (len == 0) {
+		Log(LOG_INFO, "%s:%u (%s) is closing the connection ...",
+				My_Connections[Idx].host,
+				(unsigned int) ng_ipaddr_getport(&My_Connections[Idx].addr),
+				ng_ipaddr_tostr(&My_Connections[Idx].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 );
 		}
@@ -1120,169 +1379,199 @@ 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);
 } /* Read_Request */
 
 
-static bool
-Handle_Buffer( CONN_ID Idx )
+/**
+ * Handle all data in the connection read-buffer.
+ * All data is precessed until no complete command is left. When a fatal
+ * error occurs, the connection is shut down.
+ */
+static void
+Handle_Buffer(CONN_ID Idx)
 {
-	/* Handle Data in Connections Read-Buffer.
-	 * Return true if a reuqest was handled, false otherwise (also returned on errors). */
 #ifndef STRICT_RFC
-	char *ptr1, *ptr2;
+	char *ptr1, *ptr2, *first_eol;
 #endif
 	char *ptr;
-	int len, delta;
-	bool result;
+	size_t len, delta;
+	time_t starttime;
 #ifdef ZLIB
 	bool old_z;
 #endif
 
-	result = false;
+	starttime = time(NULL);
 	for (;;) {
 		/* Check penalty */
-		if( My_Connections[Idx].delaytime > time( NULL )) return result;
+		if (My_Connections[Idx].delaytime > starttime)
+			return;
 #ifdef ZLIB
-		/* unpack compressed data */
-		if ( Conn_OPTION_ISSET( &My_Connections[Idx], CONN_ZIP ))
-			if( ! Unzip_Buffer( Idx )) return false;
+		/* Unpack compressed data, if compression is in use */
+		if (Conn_OPTION_ISSET(&My_Connections[Idx], CONN_ZIP)) {
+			/* When unzipping fails, Unzip_Buffer() shuts
+			 * down the connection itself */
+			if (!Unzip_Buffer(Idx))
+				return;
+		}
 #endif
 
 		if (0 == array_bytes(&My_Connections[Idx].rbuf))
-			break;
+			return;
 
-		if (!array_cat0_temporary(&My_Connections[Idx].rbuf)) /* make sure buf is NULL terminated */
-			return false;
+		/* Make sure that the buffer is NULL terminated */
+		if (!array_cat0_temporary(&My_Connections[Idx].rbuf)) {
+			Conn_Close(Idx, NULL,
+				   "Can't allocate memory [Handle_Buffer]",
+				   true);
+			return;
+		}
 
-		/* A Complete Request end with CR+LF, see RFC 2812. */
-		ptr = strstr( array_start(&My_Connections[Idx].rbuf), "\r\n" );
+		/* RFC 2812, section "2.3 Messages", 5th paragraph:
+		 * "IRC messages are always lines of characters terminated
+		 * with a CR-LF (Carriage Return - Line Feed) pair [...]". */
+		delta = 2;
+		ptr = strstr(array_start(&My_Connections[Idx].rbuf), "\r\n");
 
-		if( ptr ) delta = 2; /* complete request */
 #ifndef STRICT_RFC
-		else {
-			/* Check for non-RFC-compliant request (only CR or LF)? Unfortunately,
-			 * there are quite a few clients that do this (incl. "mIRC" :-( */
-			ptr1 = strchr( array_start(&My_Connections[Idx].rbuf), '\r' );
-			ptr2 = strchr( array_start(&My_Connections[Idx].rbuf), '\n' );
+		/* Check for non-RFC-compliant request (only CR or LF)?
+		 * Unfortunately, there are quite a few clients out there
+		 * that do this -- e. g. mIRC, BitchX, and Trillian :-( */
+		ptr1 = strchr(array_start(&My_Connections[Idx].rbuf), '\r');
+		ptr2 = strchr(array_start(&My_Connections[Idx].rbuf), '\n');
+		if (ptr) {
+			/* Check if there is a single CR or LF _before_ the
+			 * corerct CR+LF line terminator:  */
+			first_eol = ptr1 < ptr2 ? ptr1 : ptr2;
+			if (first_eol < ptr) {
+				/* Single CR or LF before CR+LF found */
+				ptr = first_eol;
+				delta = 1;
+			}
+		} else if (ptr1 || ptr2) {
+			/* No CR+LF terminated command found, but single
+			 * CR or LF found ... */
+			if (ptr1 && ptr2)
+				ptr = ptr1 < ptr2 ? ptr1 : ptr2;
+			else
+				ptr = ptr1 ? ptr1 : ptr2;
 			delta = 1;
-			if( ptr1 && ptr2 ) ptr = ptr1 > ptr2 ? ptr2 : ptr1;
-			else if( ptr1 ) ptr = ptr1;
-			else if( ptr2 ) ptr = ptr2;
 		}
 #endif
 
-		if( ! ptr )
-			break;
+		if (!ptr)
+			return;
 
-		/* End of request found */
+		/* Complete (=line terminated) request found, handle it! */
 		*ptr = '\0';
 
-		len = ( ptr - (char*) array_start(&My_Connections[Idx].rbuf)) + delta;
+		len = ptr - (char *)array_start(&My_Connections[Idx].rbuf) + delta;
 
-		if( len < 0 || 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)!",
-						Idx, array_bytes(&My_Connections[Idx].rbuf), COMMAND_LEN - 1 );
-			Conn_Close( Idx, NULL, "Request too long", true );
-			return false;
+		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)!",
+			    Idx, array_bytes(&My_Connections[Idx].rbuf),
+			    COMMAND_LEN - 1);
+			Conn_Close(Idx, NULL, "Request too long", true);
+			return;
 		}
 
-		if (len <= 2) { /* request was empty (only '\r\n') */
-			array_moveleft(&My_Connections[Idx].rbuf, 1, delta); /* delta is either 1 or 2 */
-			break;
+		if (len <= delta) {
+			/* Request is empty (only '\r\n', '\r' or '\n');
+			 * delta is 2 ('\r\n') or 1 ('\r' or '\n'), see above */
+			array_moveleft(&My_Connections[Idx].rbuf, 1, len);
+			return;
 		}
+
 #ifdef ZLIB
 		/* remember if stream is already compressed */
 		old_z = My_Connections[Idx].options & CONN_ZIP;
 #endif
 
 		My_Connections[Idx].msg_in++;
-		if (!Parse_Request(Idx, (char*)array_start(&My_Connections[Idx].rbuf) ))
-			return false;
-
-		result = true;
+		if (!Parse_Request
+		    (Idx, (char *)array_start(&My_Connections[Idx].rbuf)))
+			return;
 
 		array_moveleft(&My_Connections[Idx].rbuf, 1, len);
-#ifdef DEBUG
-		Log(LOG_DEBUG,
-		    "Connection %d: %d bytes left in read buffer.",
-		    Idx, array_bytes(&My_Connections[Idx].rbuf));
-#endif
+		LogDebug("Connection %d: %d bytes left in read buffer.",
+			 Idx, array_bytes(&My_Connections[Idx].rbuf));
 #ifdef ZLIB
-		if(( ! old_z ) && ( My_Connections[Idx].options & CONN_ZIP ) &&
-				( array_bytes(&My_Connections[Idx].rbuf) > 0 ))
-		{
-			/* 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 ((!old_z) && (My_Connections[Idx].options & CONN_ZIP) &&
+		    (array_bytes(&My_Connections[Idx].rbuf) > 0)) {
+			/* The last command activated socket compression.
+			 * Data that was read after that needs to be copied
+			 * to the unzip buffer for decompression: */
+			if (!array_copy
+			    (&My_Connections[Idx].zip.rbuf,
+			     &My_Connections[Idx].rbuf)) {
+				Conn_Close(Idx, NULL,
+					   "Can't allocate memory [Handle_Buffer]",
+					   true);
+				return;
 			}
-			if (!array_copy( &My_Connections[Idx].zip.rbuf, &My_Connections[Idx].rbuf ))
-				return false;
 
 			array_trunc(&My_Connections[Idx].rbuf);
-#ifdef DEBUG
-			Log( LOG_DEBUG, "Moved already received data (%u bytes) to uncompression buffer.",
-								array_bytes(&My_Connections[Idx].zip.rbuf));
-#endif /* DEBUG */
+			LogDebug
+			    ("Moved already received data (%u bytes) to uncompression buffer.",
+			     array_bytes(&My_Connections[Idx].zip.rbuf));
 		}
-#endif /* ZLIB */
+#endif
 	}
-
-	return result;
 } /* Handle_Buffer */
 
 
 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 */
-#ifdef DEBUG
-					Log( LOG_DEBUG, "Connection %d: Ping timeout: %d seconds.", i, Conf_PongTimeout );
-#endif
-					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 */
-#ifdef DEBUG
-				Log( LOG_DEBUG, "Connection %d: sending PING ...", i );
-#endif
-				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
@@ -1290,11 +1579,9 @@ Check_Connections( void )
 
 			if (My_Connections[i].lastdata <
 			    time(NULL) - Conf_PongTimeout) {
-#ifdef DEBUG
-				Log(LOG_DEBUG,
-				    "Unregistered connection %d timed out ...",
-				    i);
-#endif
+				LogDebug
+				    ("Unregistered connection %d timed out ...",
+				     i);
 				Conn_Close(i, NULL, "Timeout", false);
 			}
 		}
@@ -1307,19 +1594,9 @@ Check_Servers( void )
 {
 	/* Check if we can establish further server links */
 
-	CONN_ID idx;
 	int i, n;
 	time_t time_now;
 
-	/* Search all connections, are there results from the resolver? */
-	for( idx = 0; idx < Pool_Size; idx++ ) {
-		if( My_Connections[idx].sock != SERVER_WAIT ) continue;
-
-		/* IP resolved? */
-		if (Resolve_SUCCESS(&My_Connections[idx].res_stat))
-			New_Server(Conf_GetServer( idx ), idx);
-	}
-
 	/* Check all configured servers */
 	for( i = 0; i < MAX_SERVERS; i++ ) {
 		/* Valid outgoing server which isn't already connected or disabled? */
@@ -1331,7 +1608,7 @@ 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;
 			}
@@ -1345,127 +1622,126 @@ Check_Servers( void )
 
 		/* Okay, try to connect now */
 		Conf_Server[i].lasttry = time_now;
-
-		/* Search free connection structure */
-		for( idx = 0; idx < Pool_Size; idx++ ) if( My_Connections[idx].sock == NONE ) break;
-		if (idx >= Pool_Size) {
-			Log( LOG_ALERT, "Can't establist server connection: connection limit reached (%d)!",
-											Pool_Size );
-			return;
-		}
-#ifdef DEBUG
-		Log( LOG_DEBUG, "Preparing connection %d for \"%s\" ...", idx, Conf_Server[i].host );
-#endif
-
-		Init_Conn_Struct( idx );
-		My_Connections[idx].sock = SERVER_WAIT;
-		Conf_Server[i].conn_id = idx;
-
-		/* Resolve Hostname. If this fails, try to use it as an IP address */
-		strlcpy( Conf_Server[i].ip, Conf_Server[i].host, sizeof( Conf_Server[i].ip ));
-		strlcpy( My_Connections[idx].host, Conf_Server[i].host, sizeof( My_Connections[idx].host ));
-
-		assert(Resolve_Getfd(&My_Connections[idx].res_stat) < 0);
-
-		Resolve_Name(&My_Connections[idx].res_stat, Conf_Server[i].host, cb_Read_Resolver_Result);
+		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);
 	}
 } /* Check_Servers */
 
 
 static void
-New_Server( int Server, CONN_ID Idx )
+New_Server( int Server , ng_ipaddr_t *dest)
 {
 	/* Establish new server link */
-
-	struct sockaddr_in new_addr;
-	struct in_addr inaddr;
-	int res, new_sock;
+	char ip_str[NG_INET_ADDRSTRLEN];
+	int af_dest, res, new_sock;
 	CLIENT *c;
 
 	assert( Server > NONE );
-	assert( Idx > 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
-	{
-		/* Can't convert IP address */
-		Log( LOG_ERR, "Can't connect to \"%s\" (connection %d): can't convert ip address %s!", Conf_Server[Server].host, Idx, Conf_Server[Server].ip );
-		goto out;
+	if (!ng_ipaddr_tostr_r(dest, ip_str)) {
+		Log(LOG_WARNING, "New_Server: Could not convert IP to string");
+		return;
 	}
 
-	memset( &new_addr, 0, sizeof( new_addr ));
-	new_addr.sin_family = AF_INET;
-	new_addr.sin_addr = inaddr;
-	new_addr.sin_port = htons( Conf_Server[Server].port );
+	Log( LOG_INFO, "Establishing connection to \"%s\", %s, port %d ... ",
+			Conf_Server[Server].host, ip_str, Conf_Server[Server].port );
 
-	new_sock = socket( PF_INET, SOCK_STREAM, 0 );
-	if ( new_sock < 0 ) {
-		/* Can't create socket */
-		Log( LOG_CRIT, "Can't create socket: %s!", strerror( errno ));
-		goto out;
+	af_dest = ng_ipaddr_af(dest);
+	new_sock = socket(af_dest, SOCK_STREAM, 0);
+	if (new_sock < 0) {
+		Log( LOG_CRIT, "Can't create socket (af %d) : %s!", af_dest, strerror( errno ));
+		return;
 	}
 
-	if( ! Init_Socket( new_sock )) return;
+	if (!Init_Socket(new_sock))
+		return;
 
-	res = connect( new_sock, (struct sockaddr *)&new_addr, sizeof( new_addr ));
+	/* is a bind address configured? */
+	res = ng_ipaddr_af(&Conf_Server[Server].bind_addr);
+	/* if yes, bind now. If it fails, warn and let connect() pick a source address */
+	if (res && bind(new_sock, (struct sockaddr *) &Conf_Server[Server].bind_addr,
+				ng_ipaddr_salen(&Conf_Server[Server].bind_addr)))
+	{
+		ng_ipaddr_tostr_r(&Conf_Server[Server].bind_addr, ip_str);
+		Log(LOG_WARNING, "Can't bind socket to %s: %s!", ip_str, strerror(errno));
+	}
+	ng_ipaddr_setport(dest, Conf_Server[Server].port);
+	res = connect(new_sock, (struct sockaddr *) dest, ng_ipaddr_salen(dest));
 	if(( res != 0 ) && ( errno != EINPROGRESS )) {
-		/* Can't connect socket */
 		Log( LOG_CRIT, "Can't connect socket: %s!", strerror( errno ));
 		close( new_sock );
-		goto out;
+		return;
 	}
 
-	/* Client-Struktur initialisieren */
-	c = Client_NewLocal( Idx, inet_ntoa( new_addr.sin_addr ), CLIENT_UNKNOWNSERVER, false );
-	if( ! c ) {
-		/* Can't create new client structure */
+	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;
+	}
+
+	My_Connections = array_start(&My_ConnArray);
+
+	assert(My_Connections[new_sock].sock <= 0);
+
+	Init_Conn_Struct(new_sock);
+
+	ng_ipaddr_tostr_r(dest, ip_str);
+	c = Client_NewLocal(new_sock, ip_str, CLIENT_UNKNOWNSERVER, false);
+	if (!c) {
 		Log( LOG_ALERT, "Can't establish connection: can't create client structure!" );
 		close( new_sock );
-		goto out;
+		return;
 	}
 
 	Client_SetIntroducer( c, c );
 	Client_SetToken( c, TOKEN_OUTBOUND );
 
 	/* Register connection */
-	My_Connections[Idx].sock = new_sock;
-	My_Connections[Idx].addr = new_addr;
-	strlcpy( My_Connections[Idx].host, Conf_Server[Server].host, sizeof( My_Connections[Idx].host ));
+	Conf_Server[Server].conn_id = new_sock;
+	My_Connections[new_sock].sock = new_sock;
+	My_Connections[new_sock].addr = *dest;
+	My_Connections[new_sock].client = c;
+	strlcpy( My_Connections[new_sock].host, Conf_Server[Server].host,
+				sizeof(My_Connections[new_sock].host ));
 
 	/* Register new socket */
 	if (!io_event_create( new_sock, IO_WANTWRITE, cb_connserver)) {
 		Log( LOG_ALERT, "io_event_create(): could not add fd %d", strerror(errno));
-		Conn_Close( Idx, "io_event_create() failed", NULL, false );
-		goto out;
+		Conn_Close( new_sock, "io_event_create() failed", NULL, false );
+		Init_Conn_Struct( new_sock );
+		Conf_Server[Server].conn_id = NONE;
+	}
+#ifdef SSL_SUPPORT
+	if (Conf_Server[Server].SSLConnect && !ConnSSL_PrepareConnect( &My_Connections[new_sock],
+								&Conf_Server[Server] ))
+	{
+		Log(LOG_ALERT, "Could not initialize SSL for outgoing connection");
+		Conn_Close( new_sock, "Could not initialize SSL for outgoing connection", NULL, false );
+		Init_Conn_Struct( new_sock );
+		Conf_Server[Server].conn_id = NONE;
 	}
-
-#ifdef DEBUG
-	Log( LOG_DEBUG, "Registered new connection %d on socket %d.", Idx, My_Connections[Idx].sock );
 #endif
-	Conn_OPTION_ADD( &My_Connections[Idx], CONN_ISCONNECTING );
-	return;
-out:
-	Init_Conn_Struct( Idx );
-	Conf_Server[Server].conn_id = NONE;
+	NumConnections++;
+	LogDebug("Registered new connection %d on socket %d (%ld in total).",
+		 new_sock, My_Connections[new_sock].sock, NumConnections);
+	Conn_OPTION_ADD( &My_Connections[new_sock], CONN_ISCONNECTING );
 } /* 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 ));
-	My_Connections[Idx].sock = NONE;
+	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);
@@ -1496,9 +1772,7 @@ Init_Socket( int Sock )
 	/* Set type of service (TOS) */
 #if defined(IP_TOS) && defined(IPTOS_LOWDELAY)
 	value = IPTOS_LOWDELAY;
-#ifdef DEBUG
-	Log( LOG_DEBUG, "Setting option IP_TOS on socket %d to IPTOS_LOWDELAY (%d).", Sock, value );
-#endif
+	LogDebug("Setting option IP_TOS on socket %d to IPTOS_LOWDELAY (%d).", Sock, value );
 	if( setsockopt( Sock, SOL_IP, IP_TOS, &value, (socklen_t)sizeof( value )) != 0 )
 	{
 		Log( LOG_ERR, "Can't set socket option IP_TOS: %s!", strerror( errno ));
@@ -1510,6 +1784,57 @@ Init_Socket( int Sock )
 } /* Init_Socket */
 
 
+
+static void
+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;
+	ng_ipaddr_t dest_addrs[4];	/* we can handle at most 3; but we read up to
+					   four so we can log the 'more than we can handle'
+					   condition */
+
+	LogDebug("Resolver: Got forward lookup callback on fd %d, events %d", fd, events);
+
+	for (i=0; i < MAX_SERVERS; i++) {
+		  if (Resolve_Getfd(&Conf_Server[i].res_stat) == fd )
+			  break;
+	}
+
+	if( i >= MAX_SERVERS) {
+		/* Ops, no matching server found?! */
+		io_close( fd );
+		LogDebug("Resolver: Got Forward Lookup callback for unknown server!?");
+		return;
+	}
+
+	/* Read result from pipe */
+	len = Resolve_Read(&Conf_Server[i].res_stat, dest_addrs, sizeof(dest_addrs));
+	if (len == 0)
+		return;
+
+	assert((len % sizeof(ng_ipaddr_t)) == 0);
+
+	LogDebug("Got result from resolver: %u structs (%u bytes).", len/sizeof(ng_ipaddr_t), len);
+
+	memset(&Conf_Server[i].dst_addr, 0, sizeof(&Conf_Server[i].dst_addr));
+	if (len > sizeof(ng_ipaddr_t)) {
+		/* more than one address for this hostname, remember them
+		 * in case first address is unreachable/not available */
+		len -= sizeof(ng_ipaddr_t);
+		if (len > sizeof(&Conf_Server[i].dst_addr)) {
+			len = sizeof(&Conf_Server[i].dst_addr);
+			Log(LOG_NOTICE, "Notice: Resolver returned more IP Addresses for host than we can handle,"
+					" additional addresses dropped");
+		}
+		memcpy(&Conf_Server[i].dst_addr, &dest_addrs[1], len);
+	}
+	/* connect() */
+	New_Server(i, dest_addrs);
+} /* cb_Read_Forward_Lookup */
+
+
 static void
 cb_Read_Resolver_Result( int r_fd, UNUSED short events )
 {
@@ -1518,7 +1843,7 @@ cb_Read_Resolver_Result( int r_fd, UNUSED short events )
 	 * IDENT user name.*/
 
 	CLIENT *c;
-	int i, n;
+	int i;
 	size_t len;
 	char *identptr;
 #ifdef IDENTAUTH
@@ -1527,9 +1852,7 @@ cb_Read_Resolver_Result( int r_fd, UNUSED short events )
 	char readbuf[HOST_LEN + 1];
 #endif
 
-#ifdef DEBUG
-	Log( LOG_DEBUG, "Resolver: Got callback on fd %d, events %d", r_fd, events );
-#endif
+	LogDebug("Resolver: Got callback on fd %d, events %d", r_fd, events );
 
 	/* Search associated connection ... */
 	for( i = 0; i < Pool_Size; i++ ) {
@@ -1541,15 +1864,13 @@ cb_Read_Resolver_Result( int r_fd, UNUSED short events )
 		/* Ops, none found? Probably the connection has already
 		 * been closed!? We'll ignore that ... */
 		io_close( r_fd );
-#ifdef DEBUG
-		Log( LOG_DEBUG, "Resolver: Got callback for unknown connection!?" );
-#endif
+		LogDebug("Resolver: Got callback for unknown connection!?");
 		return;
 	}
 
 	/* Read result from pipe */
 	len = Resolve_Read(&My_Connections[i].res_stat, readbuf, sizeof readbuf -1);
-	if (len == 0) 
+	if (len == 0)
 		return;
 
 	readbuf[len] = '\0';
@@ -1561,54 +1882,42 @@ cb_Read_Resolver_Result( int r_fd, UNUSED short events )
 	}
 
 	*identptr = '\0';
-#ifdef DEBUG
-	Log( LOG_DEBUG, "Got result from resolver: \"%s\" (%u bytes read).", readbuf, len);
-#endif
+	LogDebug("Got result from resolver: \"%s\" (%u bytes read).", readbuf, len);
 	/* Okay, we got a complete result: this is a host name for outgoing
 	 * connections and a host name and IDENT user name (if enabled) for
 	 * incoming connections.*/
-	if( My_Connections[i].sock > NONE ) {
-		/* Incoming connection. Search client ... */
-		c = Client_GetFromConn( i );
-		assert( c != NULL );
-
-		/* Only update client information of unregistered clients */
-		if( Client_Type( c ) == CLIENT_UNKNOWN ) {
-			strlcpy(My_Connections[i].host, readbuf, sizeof( My_Connections[i].host));
-			Client_SetHostname( c, readbuf);
+	assert ( My_Connections[i].sock >= 0 );
+	/* Incoming connection. Search client ... */
+	c = Conn_GetClient( i );
+	assert( c != NULL );
+
+	/* Only update client information of unregistered clients */
+	if( Client_Type( c ) == CLIENT_UNKNOWN ) {
+		strlcpy(My_Connections[i].host, readbuf, sizeof( My_Connections[i].host));
+		Client_SetHostname( c, readbuf);
 #ifdef IDENTAUTH
-			++identptr;
-			if (*identptr) {
-				Log( LOG_INFO, "IDENT lookup for connection %ld: \"%s\".", i, identptr);
-				Client_SetUser( c, identptr, true );
-			} else {
-				Log( LOG_INFO, "IDENT lookup for connection %ld: no result.", i );
-			}
-#endif
+		++identptr;
+		if (*identptr) {
+			Log(LOG_INFO, "IDENT lookup for connection %d: \"%s\".", i, identptr);
+			Client_SetUser(c, identptr, true);
+		} else {
+			Log(LOG_INFO, "IDENT lookup for connection %d: no result.", i);
 		}
+#endif
+	}
 #ifdef DEBUG
 		else Log( LOG_DEBUG, "Resolver: discarding result for already registered connection %d.", i );
 #endif
-	} else {
-		/* Outgoing connection (server link): set the IP address
-		 * so that we can connect to it in the main loop. */
-
-		/* Search server ... */
-		n = Conf_GetServer( i );
-		assert( n > NONE );
-
-		strlcpy( Conf_Server[n].ip, readbuf, sizeof( Conf_Server[n].ip ));
-	}
-
 	/* Reset penalty time */
 	Conn_ResetPenalty( i );
 } /* cb_Read_Resolver_Result */
 
 
 static void
-Simple_Message( int Sock, char *Msg )
+Simple_Message( int Sock, const char *Msg )
 {
 	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(). */
@@ -1616,23 +1925,40 @@ Simple_Message( int Sock, char *Msg )
 	assert( Msg != NULL );
 
 	strlcpy( buf, Msg, sizeof buf - 2);
-	strlcat( buf, "\r\n", sizeof buf);
-	(void)write( Sock, buf, strlen( buf ) );
+	len = strlcat( buf, "\r\n", sizeof buf);
+	(void)write(Sock, buf, len);
 } /* Simple_Error */
 
 
-static int
-Count_Connections( struct sockaddr_in addr_in )
+GLOBAL CLIENT *
+Conn_GetClient( CONN_ID Idx ) 
 {
-	int i, cnt;
-	
-	cnt = 0;
-	for( i = 0; i < Pool_Size; i++ ) {
-		if(( My_Connections[i].sock > NONE ) && ( My_Connections[i].addr.sin_addr.s_addr == addr_in.sin_addr.s_addr )) cnt++;
-	}
-	return cnt;
-} /* Count_Connections */
+	/* 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;
+}
 
+#ifdef SSL_SUPPORT
+/* we cannot access My_Connections in irc-info.c */
+GLOBAL bool
+Conn_GetCipherInfo(CONN_ID Idx, char *buf, size_t len)
+{
+	return ConnSSL_GetCipherInfo(&My_Connections[Idx], buf, len);
+}
+
+
+GLOBAL bool
+Conn_UsesSSL(CONN_ID Idx)
+{
+	return Conn_OPTION_ISSET(&My_Connections[Idx], CONN_SSL);
+}
+#endif
 /* -eof- */