X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/7fd68b1daeab9a2a1a3ee8f0652c25fc37bf3549..137bcc99810a8bfc97030eceee52a96c75e91987:/l2tpns.c

diff --git a/l2tpns.c b/l2tpns.c
index ed85a91..4545d6c 100644
--- a/l2tpns.c
+++ b/l2tpns.c
@@ -53,11 +53,18 @@
 #include "bgp.h"
 #endif
 
+#include "l2tplac.h"
+#include "pppoe.h"
+
+char * Vendor_name = "Linux L2TPNS";
+uint32_t call_serial_number = 0;
+
 // Globals
 configt *config = NULL;		// all configuration
 int nlfd = -1;			// netlink socket
 int tunfd = -1;			// tun interface file handle. (network device)
-int udpfd = -1;			// UDP file handle
+int udpfd[MAX_UDPFD + 1] = INIT_TABUDPFD;		// array UDP file handle + 1 for lac udp
+int udplacfd = -1;		// UDP LAC file handle
 int controlfd = -1;		// Control signal handle
 int clifd = -1;			// Socket listening for CLI connections.
 int daefd = -1;			// Socket listening for DAE connections.
@@ -160,11 +167,25 @@ config_descriptt config_values[] = {
 	CONFIG("ipv6_prefix", ipv6_prefix, IPv6),
 	CONFIG("cli_bind_address", cli_bind_address, IPv4),
 	CONFIG("hostname", hostname, STRING),
+#ifdef BGP
 	CONFIG("nexthop_address", nexthop_address, IPv4),
 	CONFIG("nexthop6_address", nexthop6_address, IPv6),
+#endif
 	CONFIG("echo_timeout", echo_timeout, INT),
 	CONFIG("idle_echo_timeout", idle_echo_timeout, INT),
-	{ NULL, 0, 0, 0 },
+	CONFIG("iftun_address", iftun_address, IPv4),
+	CONFIG("tundevicename", tundevicename, STRING),
+	CONFIG("disable_lac_func", disable_lac_func, BOOL),
+	CONFIG("auth_tunnel_change_addr_src", auth_tunnel_change_addr_src, BOOL),
+	CONFIG("bind_address_remotelns", bind_address_remotelns, IPv4),
+	CONFIG("bind_portremotelns", bind_portremotelns, SHORT),
+	CONFIG("pppoe_if_to_bind", pppoe_if_to_bind, STRING),
+	CONFIG("pppoe_service_name", pppoe_service_name, STRING),
+	CONFIG("pppoe_ac_name", pppoe_ac_name, STRING),
+	CONFIG("disable_sending_hello", disable_sending_hello, BOOL),
+	CONFIG("disable_no_spoof", disable_no_spoof, BOOL),
+	CONFIG("bind_multi_address", bind_multi_address, STRING),
+	{ NULL, 0, 0, 0 }
 };
 
 static char *plugin_functions[] = {
@@ -224,13 +245,6 @@ static tunnelidt new_tunnel(void);
 static void unhide_value(uint8_t *value, size_t len, uint16_t type, uint8_t *vector, size_t vec_len);
 static void bundleclear(bundleidt b);
 
-// on slaves, alow BGP to withdraw cleanly before exiting
-#define QUIT_DELAY	5
-
-// quit actions (master)
-#define QUIT_FAILOVER	1 // SIGTERM: exit when all control messages have been acked (for cluster failover)
-#define QUIT_SHUTDOWN	2 // SIGQUIT: shutdown sessions/tunnels, reject new connections
-
 // return internal time (10ths since process startup), set f if given
 // as a side-effect sets time_now, and time_changed
 static clockt now(double *f)
@@ -245,7 +259,8 @@ static clockt now(double *f)
 	}
 
 	// Time in milliseconds
-	time_now_ms = (t.tv_sec * 1000) + (t.tv_usec/1000);
+	// TODO FOR MLPPP DEV
+	//time_now_ms = (t.tv_sec * 1000) + (t.tv_usec/1000);
 
 	return (t.tv_sec - basetime) * 10 + t.tv_usec / 100000 + 1;
 }
@@ -281,7 +296,7 @@ void _log(int level, sessionidt s, tunnelidt t, const char *format, ...)
 		ringbuffer->buffer[ringbuffer->tail].session = s;
 		ringbuffer->buffer[ringbuffer->tail].tunnel = t;
 		va_start(ap, format);
-		vsnprintf(ringbuffer->buffer[ringbuffer->tail].message, 4095, format, ap);
+		vsnprintf(ringbuffer->buffer[ringbuffer->tail].message, MAX_LOG_LENGTH, format, ap);
 		va_end(ap);
 	}
 #endif
@@ -676,15 +691,19 @@ static void inittun(void)
 		int flags = fcntl(tunfd, F_GETFL, 0);
 		fcntl(tunfd, F_SETFL, flags | O_NONBLOCK);
 	}
+
+   if (*config->tundevicename)
+		strncpy(ifr.ifr_name, config->tundevicename, IFNAMSIZ);
+
 	if (ioctl(tunfd, TUNSETIFF, (void *) &ifr) < 0)
 	{
 		LOG(0, 0, 0, "Can't set tun interface: %s\n", strerror(errno));
 		exit(1);
 	}
-	assert(strlen(ifr.ifr_name) < sizeof(config->tundevice) - 1);
-	strncpy(config->tundevice, ifr.ifr_name, sizeof(config->tundevice));
+	assert(strlen(ifr.ifr_name) < sizeof(config->tundevicename) - 1);
+	strncpy(config->tundevicename, ifr.ifr_name, sizeof(config->tundevicename));
 
-	tunidx = if_nametoindex(config->tundevice);
+	tunidx = if_nametoindex(config->tundevicename);
 	if (tunidx == 0)
 	{
 		LOG(0, 0, 0, "Can't get tun interface index\n");
@@ -736,14 +755,30 @@ static void inittun(void)
 		req.ifmsg.ifaddr.ifa_scope = RT_SCOPE_UNIVERSE;
 		req.ifmsg.ifaddr.ifa_index = tunidx;
 
-		if (config->bind_address)
-			ip = config->bind_address;
+		if (config->nbmultiaddress > 1)
+		{
+			int i;
+			for (i = 0; i < config->nbmultiaddress ; i++)
+			{
+				ip = config->iftun_n_address[i];
+				netlink_addattr(&req.nh, IFA_LOCAL, &ip, sizeof(ip));
+				if (netlink_send(&req.nh) < 0)
+					goto senderror;
+			}
+		}
 		else
-			ip = 0x01010101; // 1.1.1.1
-		netlink_addattr(&req.nh, IFA_LOCAL, &ip, sizeof(ip));
+		{
+			if (config->iftun_address)
+				ip = config->iftun_address;
+			else
+				ip = 0x01010101; // 1.1.1.1
+			netlink_addattr(&req.nh, IFA_LOCAL, &ip, sizeof(ip));
+
+			if (netlink_send(&req.nh) < 0)
+				goto senderror;
+		}
+
 
-		if (netlink_send(&req.nh) < 0)
-			goto senderror;
 
 		// Only setup IPv6 on the tun device if we have a configured prefix
 		if (config->ipv6_prefix.s6_addr[0]) {
@@ -813,28 +848,35 @@ senderror:
 	exit(1);
 }
 
-// set up UDP ports
-static void initudp(void)
+// set up LAC UDP ports
+static void initlacudp(void)
 {
 	int on = 1;
 	struct sockaddr_in addr;
 
-	// Tunnel
+	// Tunnel to Remote LNS
 	memset(&addr, 0, sizeof(addr));
 	addr.sin_family = AF_INET;
-	addr.sin_port = htons(L2TPPORT);
-	addr.sin_addr.s_addr = config->bind_address;
-	udpfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
-	setsockopt(udpfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+	addr.sin_port = htons(config->bind_portremotelns);
+	addr.sin_addr.s_addr = config->bind_address_remotelns;
+	udplacfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+	setsockopt(udplacfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
 	{
-		int flags = fcntl(udpfd, F_GETFL, 0);
-		fcntl(udpfd, F_SETFL, flags | O_NONBLOCK);
+		int flags = fcntl(udplacfd, F_GETFL, 0);
+		fcntl(udplacfd, F_SETFL, flags | O_NONBLOCK);
 	}
-	if (bind(udpfd, (struct sockaddr *) &addr, sizeof(addr)) < 0)
+	if (bind(udplacfd, (struct sockaddr *) &addr, sizeof(addr)) < 0)
 	{
-		LOG(0, 0, 0, "Error in UDP bind: %s\n", strerror(errno));
+		LOG(0, 0, 0, "Error in UDP REMOTE LNS bind: %s\n", strerror(errno));
 		exit(1);
 	}
+}
+
+// set up control ports
+static void initcontrol(void)
+{
+	int on = 1;
+	struct sockaddr_in addr;
 
 	// Control
 	memset(&addr, 0, sizeof(addr));
@@ -848,6 +890,13 @@ static void initudp(void)
 		LOG(0, 0, 0, "Error in control bind: %s\n", strerror(errno));
 		exit(1);
 	}
+}
+
+// set up Dynamic Authorization Extensions to RADIUS port
+static void initdae(void)
+{
+	int on = 1;
+	struct sockaddr_in addr;
 
 	// Dynamic Authorization Extensions to RADIUS
 	memset(&addr, 0, sizeof(addr));
@@ -861,9 +910,30 @@ static void initudp(void)
 		LOG(0, 0, 0, "Error in DAE bind: %s\n", strerror(errno));
 		exit(1);
 	}
+}
 
-	// Intercept
-	snoopfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+// set up UDP ports
+static void initudp(int * pudpfd, in_addr_t ip_bind)
+{
+	int on = 1;
+	struct sockaddr_in addr;
+
+	// Tunnel
+	memset(&addr, 0, sizeof(addr));
+	addr.sin_family = AF_INET;
+	addr.sin_port = htons(L2TPPORT);
+	addr.sin_addr.s_addr = ip_bind;
+	(*pudpfd) = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+	setsockopt((*pudpfd), SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+	{
+		int flags = fcntl((*pudpfd), F_GETFL, 0);
+		fcntl((*pudpfd), F_SETFL, flags | O_NONBLOCK);
+	}
+	if (bind((*pudpfd), (struct sockaddr *) &addr, sizeof(addr)) < 0)
+	{
+		LOG(0, 0, 0, "Error in UDP bind: %s\n", strerror(errno));
+		exit(1);
+	}
 }
 
 //
@@ -1156,6 +1226,12 @@ void tunnelsend(uint8_t * buf, uint16_t l, tunnelidt t)
 		return;
 	}
 
+	if (t == TUNNEL_ID_PPPOE)
+	{
+		pppoe_sess_send(buf, l, t);
+		return;
+	}
+
 	if (!tunnel[t].ip)
 	{
 		LOG(1, 0, t, "Error sending data out tunnel: no remote endpoint (tunnel not set up)\n");
@@ -1183,10 +1259,10 @@ void tunnelsend(uint8_t * buf, uint16_t l, tunnelidt t)
 		}
 	}
 
-	if (sendto(udpfd, buf, l, 0, (void *) &addr, sizeof(addr)) < 0)
+	if (sendto(udpfd[tunnel[t].indexudp], buf, l, 0, (void *) &addr, sizeof(addr)) < 0)
 	{
 		LOG(0, ntohs((*(uint16_t *) (buf + 6))), t, "Error sending data out tunnel: %s (udpfd=%d, buf=%p, len=%d, dest=%s)\n",
-				strerror(errno), udpfd, buf, l, inet_ntoa(addr.sin_addr));
+				strerror(errno), udpfd[tunnel[t].indexudp], buf, l, inet_ntoa(addr.sin_addr));
 		STAT(tunnel_tx_errors);
 		return;
 	}
@@ -1572,17 +1648,15 @@ void processipout(uint8_t *buf, int len)
 		else
 		{
 			// Send it as one frame (NO MPPP Frame)
-			uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, 0, 0);
-			if (!p) return;
-			tunnelsend(fragbuf, len + (p-fragbuf), t); // send it...
+			uint8_t *p = opt_makeppp(buf, len, s, t, PPPIP, 0, 0, 0);
+			tunnelsend(p, len + (buf-p), t); // send it...
 			update_session_out_stat(s, sp, len);
 		}
 	}
 	else
 	{
-		uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, 0, 0);
-		if (!p) return;
-		tunnelsend(fragbuf, len + (p-fragbuf), t); // send it...
+		uint8_t *p = opt_makeppp(buf, len, s, t, PPPIP, 0, 0, 0);
+		tunnelsend(p, len + (buf-p), t); // send it...
 		update_session_out_stat(s, sp, len);
 	}
 
@@ -1767,10 +1841,10 @@ static void send_ipout(sessionidt s, uint8_t *buf, int len)
 static void control16(controlt * c, uint16_t avp, uint16_t val, uint8_t m)
 {
 	uint16_t l = (m ? 0x8008 : 0x0008);
-	c->buf16[c->length/2 + 0] = htons(l);
-	c->buf16[c->length/2 + 1] = htons(0);
-	c->buf16[c->length/2 + 2] = htons(avp);
-	c->buf16[c->length/2 + 3] = htons(val);
+	*(uint16_t *) (c->buf + c->length + 0) = htons(l);
+	*(uint16_t *) (c->buf + c->length + 2) = htons(0);
+	*(uint16_t *) (c->buf + c->length + 4) = htons(avp);
+	*(uint16_t *) (c->buf + c->length + 6) = htons(val);
 	c->length += 8;
 }
 
@@ -1778,10 +1852,10 @@ static void control16(controlt * c, uint16_t avp, uint16_t val, uint8_t m)
 static void control32(controlt * c, uint16_t avp, uint32_t val, uint8_t m)
 {
 	uint16_t l = (m ? 0x800A : 0x000A);
-	c->buf16[c->length/2 + 0] = htons(l);
-	c->buf16[c->length/2 + 1] = htons(0);
-	c->buf16[c->length/2 + 2] = htons(avp);
-	*(uint32_t *) &c->buf[c->length + 6] = htonl(val);
+	*(uint16_t *) (c->buf + c->length + 0) = htons(l);
+	*(uint16_t *) (c->buf + c->length + 2) = htons(0);
+	*(uint16_t *) (c->buf + c->length + 4) = htons(avp);
+	*(uint32_t *) (c->buf + c->length + 6) = htonl(val);
 	c->length += 10;
 }
 
@@ -1789,10 +1863,10 @@ static void control32(controlt * c, uint16_t avp, uint32_t val, uint8_t m)
 static void controls(controlt * c, uint16_t avp, char *val, uint8_t m)
 {
 	uint16_t l = ((m ? 0x8000 : 0) + strlen(val) + 6);
-	c->buf16[c->length/2 + 0] = htons(l);
-	c->buf16[c->length/2 + 1] = htons(0);
-	c->buf16[c->length/2 + 2] = htons(avp);
-	memcpy(&c->buf[c->length + 6], val, strlen(val));
+	*(uint16_t *) (c->buf + c->length + 0) = htons(l);
+	*(uint16_t *) (c->buf + c->length + 2) = htons(0);
+	*(uint16_t *) (c->buf + c->length + 4) = htons(avp);
+	memcpy(c->buf + c->length + 6, val, strlen(val));
 	c->length += 6 + strlen(val);
 }
 
@@ -1800,10 +1874,10 @@ static void controls(controlt * c, uint16_t avp, char *val, uint8_t m)
 static void controlb(controlt * c, uint16_t avp, uint8_t *val, unsigned int len, uint8_t m)
 {
 	uint16_t l = ((m ? 0x8000 : 0) + len + 6);
-	c->buf16[c->length/2 + 0] = htons(l);
-	c->buf16[c->length/2 + 1] = htons(0);
-	c->buf16[c->length/2 + 2] = htons(avp);
-	memcpy(&c->buf[c->length + 6], val, len);
+	*(uint16_t *) (c->buf + c->length + 0) = htons(l);
+	*(uint16_t *) (c->buf + c->length + 2) = htons(0);
+	*(uint16_t *) (c->buf + c->length + 4) = htons(avp);
+	memcpy(c->buf + c->length + 6, val, len);
 	c->length += 6 + len;
 }
 
@@ -1820,7 +1894,8 @@ static controlt *controlnew(uint16_t mtype)
 	}
 	assert(c);
 	c->next = 0;
-	c->buf16[0] = htons(0xC802); // flags/ver
+	c->buf[0] = 0xC8; // flags
+	c->buf[1] = 0x02; // ver
 	c->length = 12;
 	control16(c, 0, mtype, 1);
 	return c;
@@ -1846,10 +1921,10 @@ static void controlnull(tunnelidt t)
 // add a control message to a tunnel, and send if within window
 static void controladd(controlt *c, sessionidt far, tunnelidt t)
 {
-	c->buf16[1] = htons(c->length); // length
-	c->buf16[2] = htons(tunnel[t].far); // tunnel
-	c->buf16[3] = htons(far); // session
-	c->buf16[4] = htons(tunnel[t].ns); // sequence
+	*(uint16_t *) (c->buf + 2) = htons(c->length); // length
+	*(uint16_t *) (c->buf + 4) = htons(tunnel[t].far); // tunnel
+	*(uint16_t *) (c->buf + 6) = htons(far); // session
+	*(uint16_t *) (c->buf + 8) = htons(tunnel[t].ns); // sequence
 	tunnel[t].ns++;              // advance sequence
 	// link in message in to queue
 	if (tunnel[t].controlc)
@@ -1974,7 +2049,6 @@ void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_e
 		struct param_kill_session data = { &tunnel[session[s].tunnel], &session[s] };
 		LOG(2, s, session[s].tunnel, "Shutting down session %u: %s\n", s, reason);
 		run_plugins(PLUGIN_KILL_SESSION, &data);
-		session[s].die = TIME + 150; // Clean up in 15 seconds
 	}
 
 	if (session[s].ip && !walled_garden && !session[s].die)
@@ -1999,6 +2073,9 @@ void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_e
 			memcpy(&shut_acct[shut_acct_n++], &session[s], sizeof(session[s]));
 	}
 
+	if (!session[s].die)
+		session[s].die = TIME + 150; // Clean up in 15 seconds
+
 	if (session[s].ip)
 	{                          // IP allocated, clear and unroute
 		int r;
@@ -2092,20 +2169,28 @@ void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_e
 		throttle_session(s, 0, 0);
 
 	if (cdn_result)
-	{                            // Send CDN
-		controlt *c = controlnew(14); // sending CDN
-		if (cdn_error)
+	{
+		if (session[s].tunnel == TUNNEL_ID_PPPOE)
 		{
-			uint16_t buf[2];
-			buf[0] = htons(cdn_result);
-			buf[1] = htons(cdn_error);
-			controlb(c, 1, (uint8_t *)buf, 4, 1);
+			pppoe_shutdown_session(s);
 		}
 		else
-			control16(c, 1, cdn_result, 1);
+		{
+			// Send CDN
+			controlt *c = controlnew(14); // sending CDN
+			if (cdn_error)
+			{
+				uint16_t buf[2];
+				buf[0] = htons(cdn_result);
+				buf[1] = htons(cdn_error);
+				controlb(c, 1, (uint8_t *)buf, 4, 1);
+			}
+			else
+				control16(c, 1, cdn_result, 1);
 
-		control16(c, 14, s, 1);   // assigned session (our end)
-		controladd(c, session[s].far, session[s].tunnel); // send the message
+			control16(c, 14, s, 1);   // assigned session (our end)
+			controladd(c, session[s].far, session[s].tunnel); // send the message
+		}
 	}
 
 	// update filter refcounts
@@ -2145,7 +2230,7 @@ void sendipcp(sessionidt s, tunnelidt t)
 	q[4] = 3;				// ip address option
 	q[5] = 6;				// option length
 	*(in_addr_t *) (q + 6) = config->peer_address ? config->peer_address :
-				 config->bind_address ? config->bind_address :
+				 config->iftun_n_address[tunnel[t].indexudp] ? config->iftun_n_address[tunnel[t].indexudp] :
 				 my_address; // send my IP
 
 	tunnelsend(buf, 10 + (q - buf), t); // send it
@@ -2209,6 +2294,16 @@ void sessionkill(sessionidt s, char *reason)
 	if (sess_local[s].radius)
 		radiusclear(sess_local[s].radius, s); // cant send clean accounting data, session is killed
 
+	if (session[s].forwardtosession)
+	{
+		sessionidt sess = session[s].forwardtosession;
+		if (session[sess].forwardtosession == s)
+		{
+			// Shutdown the linked session also.
+			sessionshutdown(sess, reason, CDN_ADMIN_DISC, TERM_ADMIN_RESET);
+		}
+	}
+
 	LOG(2, s, session[s].tunnel, "Kill session %d (%s): %s\n", s, session[s].user, reason);
 	sessionclear(s);
 	cluster_send_session(s);
@@ -2313,7 +2408,7 @@ static void tunnelshutdown(tunnelidt t, char *reason, int result, int error, cha
 }
 
 // read and process packet on tunnel (UDP)
-void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
+void processudp(uint8_t *buf, int len, struct sockaddr_in *addr, uint16_t indexudpfd)
 {
 	uint8_t *chapresponse = NULL;
 	uint16_t l = len, t = 0, s = 0, ns = 0, nr = 0;
@@ -2360,6 +2455,12 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 		STAT(tunnel_rx_errors);
 		return;
 	}
+	if (t == TUNNEL_ID_PPPOE)
+	{
+		LOG(1, s, t, "Received UDP packet with tunnel ID reserved for pppoe\n");
+		STAT(tunnel_rx_errors);
+		return;
+	}
 	if (*buf & 0x08)
 	{                          // ns/nr
 		ns = ntohs(*(uint16_t *) p);
@@ -2398,7 +2499,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 
 		if (!config->cluster_iam_master)
 		{
-			master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);
+			master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd);
 			return;
 		}
 
@@ -2448,6 +2549,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 			tunnel[t].ip = ntohl(*(in_addr_t *) & addr->sin_addr);
 			tunnel[t].port = ntohs(addr->sin_port);
 			tunnel[t].window = 4; // default window
+			tunnel[t].indexudp = indexudpfd;
 			STAT(tunnel_created);
 			LOG(1, 0, t, "   New tunnel from %s:%u ID %u\n",
 				fmtaddr(htonl(tunnel[t].ip), 0), tunnel[t].port, t);
@@ -2719,6 +2821,13 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 					}
 					break;
 				case 13:    // Response
+					if (tunnel[t].isremotelns)
+					{
+						chapresponse = calloc(17, 1);
+						memcpy(chapresponse, b, (n < 17) ? n : 16);
+						LOG(3, s, t, "received challenge response from REMOTE LNS\n");
+					}
+					else
 					// Why did they send a response? We never challenge.
 					LOG(2, s, t, "   received unexpected challenge response\n");
 					break;
@@ -2944,8 +3053,10 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 				{
 				case 1:       // SCCRQ - Start Control Connection Request
 					tunnel[t].state = TUNNELOPENING;
+					LOG(3, s, t, "Received SCCRQ\n");
 					if (main_quit != QUIT_SHUTDOWN)
 					{
+						LOG(3, s, t, "sending SCCRP\n");
 						controlt *c = controlnew(2); // sending SCCRP
 						control16(c, 2, version, 1); // protocol version
 						control32(c, 3, 3, 1); // framing
@@ -2962,33 +3073,72 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 				case 2:       // SCCRP
 					tunnel[t].state = TUNNELOPEN;
 					tunnel[t].lastrec = time_now;
+					LOG(3, s, t, "Received SCCRP\n");
+					if (main_quit != QUIT_SHUTDOWN)
+					{
+						if (tunnel[t].isremotelns && chapresponse)
+						{
+							hasht hash;
+
+							lac_calc_rlns_auth(t, 2, hash); // id = 2 (SCCRP)
+							// check authenticator
+							if (memcmp(hash, chapresponse, 16) == 0)
+							{
+								LOG(3, s, t, "sending SCCCN to REMOTE LNS\n");
+								controlt *c = controlnew(3); // sending SCCCN
+								controls(c, 7, hostname, 1); // host name
+								controls(c, 8, Vendor_name, 1); // Vendor name
+								control16(c, 2, version, 1); // protocol version
+								control32(c, 3, 3, 1); // framing Capabilities
+								control16(c, 9, t, 1); // assigned tunnel
+								controladd(c, 0, t); // send
+							}
+							else
+							{
+								tunnelshutdown(t, "Bad chap response from REMOTE LNS", 4, 0, 0);
+							}
+						}
+					}
+					else
+					{
+						tunnelshutdown(t, "Shutting down", 6, 0, 0);
+					}
 					break;
 				case 3:       // SCCN
+					LOG(3, s, t, "Received SCCN\n");
 					tunnel[t].state = TUNNELOPEN;
 					tunnel[t].lastrec = time_now;
 					controlnull(t); // ack
 					break;
 				case 4:       // StopCCN
+					LOG(3, s, t, "Received StopCCN\n");
 					controlnull(t); // ack
 					tunnelshutdown(t, "Stopped", 0, 0, 0); // Shut down cleanly
 					break;
 				case 6:       // HELLO
+					LOG(3, s, t, "Received HELLO\n");
 					controlnull(t); // simply ACK
 					break;
 				case 7:       // OCRQ
 					// TBA
+					LOG(3, s, t, "Received OCRQ\n");
 					break;
 				case 8:       // OCRO
 					// TBA
+					LOG(3, s, t, "Received OCRO\n");
 					break;
 				case 9:       // OCCN
 					// TBA
+					LOG(3, s, t, "Received OCCN\n");
 					break;
 				case 10:      // ICRQ
+					LOG(3, s, t, "Received ICRQ\n");
 					if (sessionfree && main_quit != QUIT_SHUTDOWN)
 					{
 						controlt *c = controlnew(11); // ICRP
 
+						LOG(3, s, t, "Sending ICRP\n");
+
 						s = sessionfree;
 						sessionfree = session[s].next;
 						memset(&session[s], 0, sizeof(session[s]));
@@ -3016,6 +3166,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 
 					{
 						controlt *c = controlnew(14); // CDN
+						LOG(3, s, t, "Sending CDN\n");
 						if (!sessionfree)
 						{
 							STAT(session_overflow);
@@ -3029,9 +3180,24 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 					}
 					return;
 				case 11:      // ICRP
-					// TBA
+				LOG(3, s, t, "Received ICRP\n");
+				if (session[s].forwardtosession)
+				{
+					controlt *c = controlnew(12); // ICCN
+
+					session[s].opened = time_now;
+					session[s].tunnel = t;
+					session[s].far = asession;
+					session[s].last_packet = session[s].last_data = time_now;
+
+					control32(c, 19, 1, 1); // Framing Type
+					control32(c, 24, 10000000, 1); // Tx Connect Speed
+					controladd(c, asession, t); // send the message
+					LOG(3, s, t, "Sending ICCN\n");
+				}
 					break;
 				case 12:      // ICCN
+					LOG(3, s, t, "Received ICCN\n");
 					if (amagic == 0) amagic = time_now;
 					session[s].magic = amagic; // set magic number
 					session[s].flags = aflags; // set flags received
@@ -3044,13 +3210,14 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 
 					// Set multilink options before sending initial LCP packet
 					sess_local[s].mp_mrru = 1614;
-					sess_local[s].mp_epdis = ntohl(config->bind_address ? config->bind_address : my_address);
+					sess_local[s].mp_epdis = ntohl(config->iftun_n_address[tunnel[t].indexudp] ? config->iftun_n_address[tunnel[t].indexudp] : my_address);
 
 					sendlcp(s, t);
 					change_state(s, lcp, RequestSent);
 					break;
 
 				case 14:      // CDN
+					LOG(3, s, t, "Received CDN\n");
 					controlnull(t); // ack
 					sessionshutdown(s, disc_reason, CDN_NONE, disc_cause);
 					break;
@@ -3101,16 +3268,35 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 			l -= 2;
 		}
 
+		if (session[s].forwardtosession)
+		{
+			LOG(5, s, t, "Forwarding data session to session %u\n", session[s].forwardtosession);
+			// Forward to LAC/BAS or Remote LNS session
+			lac_session_forward(buf, len, s, proto, addr->sin_addr.s_addr, addr->sin_port, indexudpfd);
+			return;
+		}
+		else if (config->auth_tunnel_change_addr_src)
+		{
+			if (tunnel[t].ip != ntohl(addr->sin_addr.s_addr) &&
+				tunnel[t].port == ntohs(addr->sin_port))
+			{
+				// The remotes BAS are a clustered l2tpns server and the source IP has changed
+				LOG(5, s, t, "The tunnel IP source (%s) has changed by new IP (%s)\n",
+					fmtaddr(htonl(tunnel[t].ip), 0), fmtaddr(addr->sin_addr.s_addr, 0));
+
+				tunnel[t].ip = ntohl(addr->sin_addr.s_addr);
+			}
+		}
+
 		if (s && !session[s].opened)	// Is something wrong??
 		{
 			if (!config->cluster_iam_master)
 			{
 				// Pass it off to the master to deal with..
-				master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);
+				master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd);
 				return;
 			}
 
-
 			LOG(1, s, t, "UDP packet contains session which is not opened.  Dropping packet.\n");
 			STAT(tunnel_rx_errors);
 			return;
@@ -3119,37 +3305,37 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 		if (proto == PPPPAP)
 		{
 			session[s].last_packet = time_now;
-			if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; }
+			if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; }
 			processpap(s, t, p, l);
 		}
 		else if (proto == PPPCHAP)
 		{
 			session[s].last_packet = time_now;
-			if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; }
+			if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; }
 			processchap(s, t, p, l);
 		}
 		else if (proto == PPPLCP)
 		{
 			session[s].last_packet = time_now;
-			if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; }
+			if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; }
 			processlcp(s, t, p, l);
 		}
 		else if (proto == PPPIPCP)
 		{
 			session[s].last_packet = time_now;
-			if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; }
+			if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; }
 			processipcp(s, t, p, l);
 		}
 		else if (proto == PPPIPV6CP && config->ipv6_prefix.s6_addr[0])
 		{
 			session[s].last_packet = time_now;
-			if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; }
+			if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; }
 			processipv6cp(s, t, p, l);
 		}
 		else if (proto == PPPCCP)
 		{
 			session[s].last_packet = time_now;
-			if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; }
+			if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; }
 			processccp(s, t, p, l);
 		}
 		else if (proto == PPPIP)
@@ -3163,7 +3349,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 			session[s].last_packet = session[s].last_data = time_now;
 			if (session[s].walled_garden && !config->cluster_iam_master)
 			{
-				master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);
+				master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd);
 				return;
 			}
 
@@ -3181,7 +3367,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 			if (!config->cluster_iam_master)
 			{
 				// The fragments reconstruction is managed by the Master.
-				master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);
+				master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd);
 				return;
 			}
 
@@ -3198,7 +3384,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 			session[s].last_packet = session[s].last_data = time_now;
 			if (session[s].walled_garden && !config->cluster_iam_master)
 			{
-				master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);
+				master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd);
 				return;
 			}
 
@@ -3207,7 +3393,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 		else if (session[s].ppp.lcp == Opened)
 		{
 			session[s].last_packet = time_now;
-			if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; }
+			if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port, indexudpfd); return; }
 			protoreject(s, t, p, l, proto);
 		}
 		else
@@ -3295,6 +3481,9 @@ static void regular_cleanups(double period)
 		if (t > config->cluster_highest_tunnelid)
 			t = 1;
 
+		if (t == TUNNEL_ID_PPPOE)
+			continue;
+
 		// check for expired tunnels
 		if (tunnel[t].die && tunnel[t].die <= TIME)
 		{
@@ -3327,10 +3516,13 @@ static void regular_cleanups(double period)
 		// Send hello
 		if (tunnel[t].state == TUNNELOPEN && !tunnel[t].controlc && (time_now - tunnel[t].lastrec) > 60)
 		{
-			controlt *c = controlnew(6); // sending HELLO
-			controladd(c, 0, t); // send the message
-			LOG(3, 0, t, "Sending HELLO message\n");
-			t_actions++;
+			if (!config->disable_sending_hello)
+			{
+				controlt *c = controlnew(6); // sending HELLO
+				controladd(c, 0, t); // send the message
+				LOG(3, 0, t, "Sending HELLO message\n");
+				t_actions++;
+			}
 		}
 
 		// Check for tunnel changes requested from the CLI
@@ -3518,7 +3710,8 @@ static void regular_cleanups(double period)
 
 			LOG(4, s, session[s].tunnel, "No data in %d seconds, sending LCP ECHO\n",
 					(int)(time_now - session[s].last_packet));
-			tunnelsend(b, 24, session[s].tunnel); // send it
+
+			tunnelsend(b, (q - b) + 8, session[s].tunnel); // send it
 			sess_local[s].last_echo = time_now;
 			s_actions++;
 		}
@@ -3769,8 +3962,8 @@ static int still_busy(void)
 # include "fake_epoll.h"
 #endif
 
-// the base set of fds polled: cli, cluster, tun, udp, control, dae, netlink
-#define BASE_FDS	7
+// the base set of fds polled: cli, cluster, tun, udp (MAX_UDPFD), control, dae, netlink, udplac, pppoedisc, pppoesess
+#define BASE_FDS	(9 + MAX_UDPFD)
 
 // additional polled fds
 #ifdef BGP
@@ -3782,10 +3975,11 @@ static int still_busy(void)
 // main loop - gets packets on tun or udp and processes them
 static void mainloop(void)
 {
-	int i;
+	int i, j;
 	uint8_t buf[65536];
-	uint8_t *p = buf + 8; // for the hearder of the forwarded MPPP packet (see C_MPPP_FORWARD)
-	int size_bufp = sizeof(buf) - 8;
+	uint8_t *p = buf + 32; // for the hearder of the forwarded MPPP packet (see C_MPPP_FORWARD)
+						// and the forwarded pppoe session
+	int size_bufp = sizeof(buf) - 32;
 	clockt next_cluster_ping = 0;	// send initial ping immediately
 	struct epoll_event events[BASE_FDS + RADIUS_FDS + EXTRA_FDS];
 	int maxevent = sizeof(events)/sizeof(*events);
@@ -3796,8 +3990,8 @@ static void mainloop(void)
 		exit(1);
 	}
 
-	LOG(4, 0, 0, "Beginning of main loop.  clifd=%d, cluster_sockfd=%d, tunfd=%d, udpfd=%d, controlfd=%d, daefd=%d, nlfd=%d\n",
-		clifd, cluster_sockfd, tunfd, udpfd, controlfd, daefd, nlfd);
+	LOG(4, 0, 0, "Beginning of main loop.  clifd=%d, cluster_sockfd=%d, tunfd=%d, udpfd=%d, controlfd=%d, daefd=%d, nlfd=%d , udplacfd=%d, pppoefd=%d, pppoesessfd=%d\n",
+		clifd, cluster_sockfd, tunfd, udpfd[0], controlfd, daefd, nlfd, udplacfd, pppoediscfd, pppoesessfd);
 
 	/* setup our fds to poll for input */
 	{
@@ -3822,10 +4016,6 @@ static void mainloop(void)
 		e.data.ptr = &d[i++];
 		epoll_ctl(epollfd, EPOLL_CTL_ADD, tunfd, &e);
 
-		d[i].type = FD_TYPE_UDP;
-		e.data.ptr = &d[i++];
-		epoll_ctl(epollfd, EPOLL_CTL_ADD, udpfd, &e);
-
 		d[i].type = FD_TYPE_CONTROL;
 		e.data.ptr = &d[i++];
 		epoll_ctl(epollfd, EPOLL_CTL_ADD, controlfd, &e);
@@ -3837,6 +4027,22 @@ static void mainloop(void)
 		d[i].type = FD_TYPE_NETLINK;
 		e.data.ptr = &d[i++];
 		epoll_ctl(epollfd, EPOLL_CTL_ADD, nlfd, &e);
+
+		d[i].type = FD_TYPE_PPPOEDISC;
+		e.data.ptr = &d[i++];
+		epoll_ctl(epollfd, EPOLL_CTL_ADD, pppoediscfd, &e);
+
+		d[i].type = FD_TYPE_PPPOESESS;
+		e.data.ptr = &d[i++];
+		epoll_ctl(epollfd, EPOLL_CTL_ADD, pppoesessfd, &e);
+
+		for (j = 0; j < config->nbudpfd; j++)
+		{
+			d[i].type = FD_TYPE_UDP;
+			d[i].index = j;
+			e.data.ptr = &d[i++];
+			epoll_ctl(epollfd, EPOLL_CTL_ADD, udpfd[j], &e);
+		}
 	}
 
 #ifdef BGP
@@ -3898,10 +4104,12 @@ static void mainloop(void)
 			struct in_addr local;
 			socklen_t alen;
 			int c, s;
-			int udp_ready = 0;
+			int udp_ready[MAX_UDPFD + 1] = INIT_TABUDPVAR;
+			int pppoesess_ready = 0;
+			int pppoesess_pkts = 0;
 			int tun_ready = 0;
 			int cluster_ready = 0;
-			int udp_pkts = 0;
+			int udp_pkts[MAX_UDPFD + 1] = INIT_TABUDPVAR;
 			int tun_pkts = 0;
 			int cluster_pkts = 0;
 #ifdef BGP
@@ -3935,30 +4143,37 @@ static void mainloop(void)
 				// these are handled below, with multiple interleaved reads
 				case FD_TYPE_CLUSTER:	cluster_ready++; break;
 				case FD_TYPE_TUN:	tun_ready++; break;
-				case FD_TYPE_UDP:	udp_ready++; break;
+				case FD_TYPE_UDP:	udp_ready[d->index]++; break;
+				case FD_TYPE_PPPOESESS:	pppoesess_ready++; break;
+
+				case FD_TYPE_PPPOEDISC: // pppoe discovery
+					s = read(pppoediscfd, p, size_bufp);
+					if (s > 0) process_pppoe_disc(p, s);
+					n--;
+					break;
 
 				case FD_TYPE_CONTROL: // nsctl commands
 					alen = sizeof(addr);
-					s = recvfromto(controlfd, buf, sizeof(buf), MSG_WAITALL, (struct sockaddr *) &addr, &alen, &local);
-					if (s > 0) processcontrol(buf, s, &addr, alen, &local);
+					s = recvfromto(controlfd, p, size_bufp, MSG_WAITALL, (struct sockaddr *) &addr, &alen, &local);
+					if (s > 0) processcontrol(p, s, &addr, alen, &local);
 					n--;
 					break;
 
 				case FD_TYPE_DAE: // DAE requests
 					alen = sizeof(addr);
-					s = recvfromto(daefd, buf, sizeof(buf), MSG_WAITALL, (struct sockaddr *) &addr, &alen, &local);
-					if (s > 0) processdae(buf, s, &addr, alen, &local);
+					s = recvfromto(daefd, p, size_bufp, MSG_WAITALL, (struct sockaddr *) &addr, &alen, &local);
+					if (s > 0) processdae(p, s, &addr, alen, &local);
 					n--;
 					break;
 
 				case FD_TYPE_RADIUS: // RADIUS response
 					alen = sizeof(addr);
-					s = recvfrom(radfds[d->index], buf, sizeof(buf), MSG_WAITALL, (struct sockaddr *) &addr, &alen);
+					s = recvfrom(radfds[d->index], p, size_bufp, MSG_WAITALL, (struct sockaddr *) &addr, &alen);
 					if (s >= 0 && config->cluster_iam_master)
 					{
 						if (addr.sin_addr.s_addr == config->radiusserver[0] ||
 						    addr.sin_addr.s_addr == config->radiusserver[1])
-							processrad(buf, s, d->index);
+							processrad(p, s, d->index);
 						else
 							LOG(3, 0, 0, "Dropping RADIUS packet from unknown source %s\n",
 								fmtaddr(addr.sin_addr.s_addr, 0));
@@ -3969,15 +4184,15 @@ static void mainloop(void)
 
 #ifdef BGP
 				case FD_TYPE_BGP:
-				    	bgp_events[d->index] = events[i].events;
-				    	n--;
+					bgp_events[d->index] = events[i].events;
+					n--;
 					break;
 #endif /* BGP */
 
 				case FD_TYPE_NETLINK:
 				{
-					struct nlmsghdr *nh = (struct nlmsghdr *)buf;
-					s = netlink_recv(buf, sizeof(buf));
+					struct nlmsghdr *nh = (struct nlmsghdr *)p;
+					s = netlink_recv(p, size_bufp);
 					if (nh->nlmsg_type == NLMSG_ERROR)
 					{
 						struct nlmsgerr *errmsg = NLMSG_DATA(nh);
@@ -3989,7 +4204,6 @@ static void mainloop(void)
 								exit(1);
 							}
 							else
-
 								LOG(0, 0, 0, "Got a netlink error: %s\n", strerror(-errmsg->error));
 						}
 						// else it's a ack
@@ -4001,7 +4215,7 @@ static void mainloop(void)
 				}
 
 				default:
-				    	LOG(0, 0, 0, "Unexpected fd type returned from epoll_wait: %d\n", d->type);
+					LOG(0, 0, 0, "Unexpected fd type returned from epoll_wait: %d\n", d->type);
 				}
 			}
 
@@ -4011,19 +4225,22 @@ static void mainloop(void)
 
 			for (c = 0; n && c < config->multi_read_count; c++)
 			{
-				// L2TP
-				if (udp_ready)
+				for (j = 0; j < config->nbudpfd; j++)
 				{
-					alen = sizeof(addr);
-					if ((s = recvfrom(udpfd, buf, sizeof(buf), 0, (void *) &addr, &alen)) > 0)
-					{
-						processudp(buf, s, &addr);
-						udp_pkts++;
-					}
-					else
+					// L2TP and L2TP REMOTE LNS
+					if (udp_ready[j])
 					{
-						udp_ready = 0;
-						n--;
+						alen = sizeof(addr);
+						if ((s = recvfrom(udpfd[j], p, size_bufp, 0, (void *) &addr, &alen)) > 0)
+						{
+							processudp(p, s, &addr, j);
+							udp_pkts[j]++;
+						}
+						else
+						{
+							udp_ready[j] = 0;
+							n--;
+						}
 					}
 				}
 
@@ -4033,7 +4250,7 @@ static void mainloop(void)
 					if ((s = read(tunfd, p, size_bufp)) > 0)
 					{
 						processtun(p, s);
-					    	tun_pkts++;
+						tun_pkts++;
 					}
 					else
 					{
@@ -4042,13 +4259,28 @@ static void mainloop(void)
 					}
 				}
 
+				// pppoe session
+				if (pppoesess_ready)
+				{
+					if ((s = read(pppoesessfd, p, size_bufp)) > 0)
+					{
+						process_pppoe_sess(p, s);
+						pppoesess_pkts++;
+					}
+					else
+					{
+						pppoesess_ready = 0;
+						n--;
+					}
+				}
+
 				// cluster
 				if (cluster_ready)
 				{
 					alen = sizeof(addr);
-					if ((s = recvfrom(cluster_sockfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen)) > 0)
+					if ((s = recvfrom(cluster_sockfd, p, size_bufp, MSG_WAITALL, (void *) &addr, &alen)) > 0)
 					{
-						processcluster(buf, s, addr.sin_addr.s_addr);
+						processcluster(p, s, addr.sin_addr.s_addr);
 						cluster_pkts++;
 					}
 					else
@@ -4059,14 +4291,13 @@ static void mainloop(void)
 				}
 			}
 
-			if (udp_pkts > 1 || tun_pkts > 1 || cluster_pkts > 1)
+			if (udp_pkts[0] > 1 || tun_pkts > 1 || cluster_pkts > 1)
 				STAT(multi_read_used);
 
 			if (c >= config->multi_read_count)
 			{
-				LOG(3, 0, 0, "Reached multi_read_count (%d); processed %d udp, %d tun and %d cluster packets\n",
-					config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts);
-
+				LOG(3, 0, 0, "Reached multi_read_count (%d); processed %d udp, %d tun %d cluster and %d pppoe packets\n",
+					config->multi_read_count, udp_pkts[0], tun_pkts, cluster_pkts, pppoesess_pkts);
 				STAT(multi_read_exceeded);
 				more++;
 			}
@@ -4400,6 +4631,8 @@ static void initdata(int optdebug, char *optconfig)
 		exit(1);
 	}
 #endif /* BGP */
+
+	lac_initremotelnsdata();
 }
 
 static int assign_ip_address(sessionidt s)
@@ -4686,7 +4919,7 @@ void snoop_send_packet(uint8_t *packet, uint16_t size, in_addr_t destination, ui
 
 static int dump_session(FILE **f, sessiont *s)
 {
-	if (!s->opened || !s->ip || !(s->cin_delta || s->cout_delta) || !*s->user || s->walled_garden)
+	if (!s->opened || (!s->ip && !s->forwardtosession) || !(s->cin_delta || s->cout_delta) || !*s->user || s->walled_garden)
 		return 1;
 
 	if (!*f)
@@ -4712,7 +4945,7 @@ static int dump_session(FILE **f, sessiont *s)
 			"# uptime: %ld\n"
 			"# format: username ip qos uptxoctets downrxoctets\n",
 			hostname,
-			fmtaddr(config->bind_address ? config->bind_address : my_address, 0),
+			fmtaddr(config->iftun_n_address[tunnel[s->tunnel].indexudp] ? config->iftun_n_address[tunnel[s->tunnel].indexudp] : my_address, 0),
 			now,
 			now - basetime);
 	}
@@ -4859,9 +5092,33 @@ int main(int argc, char *argv[])
 		exit(1);
 
 	inittun();
-	LOG(1, 0, 0, "Set up on interface %s\n", config->tundevice);
+	LOG(1, 0, 0, "Set up on interface %s\n", config->tundevicename);
+
+	if (*config->pppoe_if_to_bind)
+	{
+		init_pppoe();
+		LOG(1, 0, 0, "Set up on pppoe interface %s\n", config->pppoe_if_to_bind);
+	}
+
+	if (!config->nbmultiaddress)
+	{
+		config->bind_n_address[0] = config->bind_address;
+		config->nbmultiaddress++;
+	}
+	config->nbudpfd = config->nbmultiaddress;
+	for (i = 0; i < config->nbudpfd; i++)
+		initudp(&udpfd[i], config->bind_n_address[i]);
+	initlacudp();
+	config->indexlacudpfd = config->nbudpfd;
+	udpfd[config->indexlacudpfd] = udplacfd;
+	config->nbudpfd++;
+
+	initcontrol();
+	initdae();
+
+	// Intercept
+	snoopfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
 
-	initudp();
 	initrad();
 	initippool();
 
@@ -5093,6 +5350,66 @@ static void update_config()
 	if (!config->radius_dae_port)
 		config->radius_dae_port = DAEPORT;
 
+	if(!config->bind_portremotelns)
+		config->bind_portremotelns = L2TPLACPORT;
+	if(!config->bind_address_remotelns)
+		config->bind_address_remotelns = INADDR_ANY;
+
+	if (*config->bind_multi_address)
+	{
+		char *sip = config->bind_multi_address;
+		char *n = sip;
+		char *e = config->bind_multi_address + strlen(config->bind_multi_address);
+		config->nbmultiaddress = 0;
+
+		while (*sip && (sip < e))
+		{
+			in_addr_t ip = 0;
+			uint8_t u = 0;
+
+			while (n < e && (*n == ',' || *n == ' ')) n++;
+
+			while (n < e && (isdigit(*n) || *n == '.'))
+			{
+				 if (*n == '.')
+				 {
+					 ip = (ip << 8) + u;
+					 u = 0;
+				 }
+				 else
+					u = u * 10 + *n - '0';
+				 n++;
+			}
+			ip = (ip << 8) + u;
+			n++;
+
+			if (ip)
+			{
+				config->bind_n_address[config->nbmultiaddress] = htonl(ip);
+				config->iftun_n_address[config->nbmultiaddress] = htonl(ip);
+				config->nbmultiaddress++;
+				LOG(1, 0, 0, "Bind address %s\n", fmtaddr(htonl(ip), 0));
+			}
+
+			sip = n;
+		}
+
+		if (config->nbmultiaddress >= 1)
+		{
+			config->bind_address = config->bind_n_address[0];
+			config->iftun_address = config->bind_address;
+		}
+	}
+
+	if(!config->iftun_address)
+	{
+		config->iftun_address = config->bind_address;
+		config->iftun_n_address[0] = config->iftun_address;
+	}
+
+	if (!*config->pppoe_ac_name)
+		strncpy(config->pppoe_ac_name, DEFAULT_PPPOE_AC_NAME, sizeof(config->pppoe_ac_name) - 1);
+
 	// re-initialise the random number source
 	initrandom(config->random_device);
 
@@ -5271,8 +5588,7 @@ int sessionsetup(sessionidt s, tunnelidt t)
 
 			if (ip == session[i].ip)
 			{
-				sessionkill(i, "Duplicate IP address");
-				cluster_listinvert_session(s, i);
+				sessionshutdown(i, "Duplicate IP address", CDN_ADMIN_DISC, TERM_ADMIN_RESET);  // close radius/routes, etc.
 				continue;
 			}
 
@@ -5293,7 +5609,7 @@ int sessionsetup(sessionidt s, tunnelidt t)
 
 			// Drop the new session in case of duplicate sessionss, not the old one.
 			if (!strcasecmp(user, session[i].user))
-				sessionkill(i, "Duplicate session for users");
+				sessionshutdown(i, "Duplicate session for users", CDN_ADMIN_DISC, TERM_ADMIN_RESET);  // close radius/routes, etc.
 		}
 	}
 
@@ -5829,7 +6145,7 @@ static tunnelidt new_tunnel()
 	tunnelidt i;
 	for (i = 1; i < MAXTUNNEL; i++)
 	{
-		if (tunnel[i].state == TUNNELFREE)
+		if ((tunnel[i].state == TUNNELFREE) && (i != TUNNEL_ID_PPPOE))
 		{
 			LOG(4, 0, i, "Assigning tunnel ID %u\n", i);
 			if (i > config->cluster_highest_tunnelid)
@@ -6146,3 +6462,49 @@ int ip_filter(uint8_t *buf, int len, uint8_t filter)
 	// default deny
     	return 0;
 }
+
+tunnelidt lac_new_tunnel()
+{
+	return new_tunnel();
+}
+
+void lac_tunnelclear(tunnelidt t)
+{
+	tunnelclear(t);
+}
+
+void lac_send_SCCRQ(tunnelidt t, uint8_t * auth, unsigned int auth_len)
+{
+	uint16_t version = 0x0100;	// protocol version
+
+	tunnel[t].state = TUNNELOPENING;
+
+	// Sent SCCRQ - Start Control Connection Request
+	controlt *c = controlnew(1); // sending SCCRQ
+	controls(c, 7, hostname, 1); // host name
+	controls(c, 8, Vendor_name, 1); // Vendor name
+	control16(c, 2, version, 1); // protocol version
+	control32(c, 3, 3, 1); // framing Capabilities
+	control16(c, 9, t, 1); // assigned tunnel
+	controlb(c, 11, (uint8_t *) auth, auth_len, 1);  // CHAP Challenge
+	LOG(3, 0, t, "Sent SCCRQ to REMOTE LNS\n");
+	controladd(c, 0, t); // send
+}
+
+void lac_send_ICRQ(tunnelidt t, sessionidt s)
+{
+	// Sent ICRQ  Incoming-call-request
+	controlt *c = controlnew(10); // ICRQ
+
+	control16(c, 14, s, 1); // assigned sesion
+	call_serial_number++;
+	control32(c, 15, call_serial_number, 1);  // call serial number
+	LOG(3, s, t, "Sent ICRQ to REMOTE LNS (far ID %u)\n", tunnel[t].far);
+	controladd(c, 0, t); // send
+}
+
+void lac_tunnelshutdown(tunnelidt t, char *reason, int result, int error, char *msg)
+{
+	tunnelshutdown(t, reason, result, error, msg);
+}
+