X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/bda0151354ac2fbeff56ba8c934d1c3de6cc1898..786a8c4546c4a28f21d8995567e6f8f28f2eb053:/radius.c

diff --git a/radius.c b/radius.c
index 690380f..4321d82 100644
--- a/radius.c
+++ b/radius.c
@@ -1,7 +1,5 @@
 // L2TPNS Radius Stuff
 
-char const *cvs_id_radius = "$Id: radius.c,v 1.36 2005-06-30 14:31:26 bodea Exp $";
-
 #include <time.h>
 #include <stdio.h>
 #include <sys/types.h>
@@ -13,6 +11,7 @@ char const *cvs_id_radius = "$Id: radius.c,v 1.36 2005-06-30 14:31:26 bodea Exp
 #include <ctype.h>
 #include <netinet/in.h>
 #include <errno.h>
+
 #include "md5.h"
 #include "constants.h"
 #include "l2tpns.h"
@@ -20,6 +19,9 @@ char const *cvs_id_radius = "$Id: radius.c,v 1.36 2005-06-30 14:31:26 bodea Exp
 #include "util.h"
 #include "cluster.h"
 
+#include "l2tplac.h"
+#include "pppoe.h"
+
 extern radiust *radius;
 extern sessiont *session;
 extern tunnelt *tunnel;
@@ -27,10 +29,43 @@ extern configt *config;
 extern int *radfds;
 extern ip_filtert *ip_filters;
 
+static const hasht zero;
+
+static void calc_auth(const void *buf, size_t len, const uint8_t *in, uint8_t *out)
+{
+	MD5_CTX ctx;
+
+	MD5_Init(&ctx);
+	MD5_Update(&ctx, (void *)buf, 4); // code, id, length
+	MD5_Update(&ctx, (void *)in, 16); // auth
+	MD5_Update(&ctx, (void *)(buf + 20), len - 20);
+	MD5_Update(&ctx, config->radiussecret, strlen(config->radiussecret));
+	MD5_Final(out, &ctx);
+}
+
 // Set up socket for radius requests
 void initrad(void)
 {
 	int i;
+	uint16_t port = 0;
+	uint16_t min = config->radius_bind_min;
+	uint16_t max = config->radius_bind_max;
+	int inc = 1;
+	struct sockaddr_in addr;
+
+	if (min)
+	{
+		port = min;
+		if (!max)
+			max = ~0 - 1;
+	}
+	else if (max) /* no minimum specified, bind from max down */
+	{
+		port = max;
+		min = 1;
+		inc = -1;
+	}
+
 	LOG(3, 0, 0, "Creating %d sockets for RADIUS queries\n", RADIUS_FDS);
 	radfds = calloc(sizeof(int), RADIUS_FDS);
 	for (i = 0; i < RADIUS_FDS; i++)
@@ -39,6 +74,27 @@ void initrad(void)
 		radfds[i] = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
 		flags = fcntl(radfds[i], F_GETFL, 0);
 		fcntl(radfds[i], F_SETFL, flags | O_NONBLOCK);
+
+		if (port)
+		{
+			int b;
+
+			memset(&addr, 0, sizeof(addr));
+			addr.sin_family = AF_INET;
+			addr.sin_addr.s_addr = INADDR_ANY;
+
+			do {
+				addr.sin_port = htons(port);
+				if ((b = bind(radfds[i], (struct sockaddr *) &addr, sizeof(addr))) < 0)
+				{
+					if ((port += inc) < min || port > max)
+					{
+						LOG(0, 0, 0, "Can't bind RADIUS socket in range %u-%u\n", min, max);
+						exit(1);
+					}
+				}
+			} while (b < 0);
+		}
 	}
 }
 
@@ -123,7 +179,7 @@ void radiussend(uint16_t r, uint8_t state)
 		return;
 	}
 
-	if (state != RADIUSAUTH && !config->radius_accounting)
+	if (state != RADIUSAUTH && state != RADIUSJUSTAUTH && !config->radius_accounting)
 	{
 		// Radius accounting is turned off
 		radiusclear(r, s);
@@ -143,8 +199,8 @@ void radiussend(uint16_t r, uint8_t state)
 	{
 		if (s)
 		{
-			if (state == RADIUSAUTH)
-				sessionshutdown(s, "RADIUS timeout.", 3, 0);
+			if (state == RADIUSAUTH || state == RADIUSJUSTAUTH)
+				sessionshutdown(s, "RADIUS timeout.", CDN_ADMIN_DISC, TERM_REAUTHENTICATION_FAILURE);
 			else
 			{
 				LOG(1, s, session[s].tunnel, "RADIUS timeout, but in state %s so don't timeout session\n",
@@ -165,6 +221,7 @@ void radiussend(uint16_t r, uint8_t state)
 	switch (state)
 	{
 		case RADIUSAUTH:
+		case RADIUSJUSTAUTH:
 			b[0] = AccessRequest;               // access request
 			break;
 		case RADIUSSTART:
@@ -177,15 +234,16 @@ void radiussend(uint16_t r, uint8_t state)
 	}
 	b[1] = r >> RADIUS_SHIFT;       // identifier
 	memcpy(b + 4, radius[r].auth, 16);
+
 	p = b + 20;
 	if (s)
 	{
 		*p = 1;                 // user name
 		p[1] = strlen(session[s].user) + 2;
-		strcpy(p + 2, session[s].user);
+		strcpy((char *) p + 2, session[s].user);
 		p += p[1];
 	}
-	if (state == RADIUSAUTH)
+	if (state == RADIUSAUTH || state == RADIUSJUSTAUTH)
 	{
 		if (radius[r].chap)
 		{
@@ -212,13 +270,13 @@ void radiussend(uint16_t r, uint8_t state)
 				while (p < pl)
 				{
 					MD5_CTX ctx;
-					MD5Init(&ctx);
-					MD5Update(&ctx, config->radiussecret, strlen(config->radiussecret));
+					MD5_Init(&ctx);
+					MD5_Update(&ctx, config->radiussecret, strlen(config->radiussecret));
 					if (p)
-						MD5Update(&ctx, pass + p - 16, 16);
+						MD5_Update(&ctx, pass + p - 16, 16);
 					else
-						MD5Update(&ctx, radius[r].auth, 16);
-					MD5Final(hash, &ctx);
+						MD5_Update(&ctx, radius[r].auth, 16);
+					MD5_Final(hash, &ctx);
 					do
 					{
 						pass[p] ^= hash[p & 15];
@@ -234,8 +292,8 @@ void radiussend(uint16_t r, uint8_t state)
 			p += p[1];
 		}
 	}
-	else if (state == RADIUSSTART || state == RADIUSSTOP || state == RADIUSINTERIM)
-	{			// accounting
+	else // accounting
+	{
 		*p = 40;	// accounting type
 		p[1] = 6;
 		*(uint32_t *) (p + 2) = htonl(state - RADIUSSTART + 1); // start=1, stop=2, interim=3
@@ -244,7 +302,7 @@ void radiussend(uint16_t r, uint8_t state)
 		{
 			*p = 44;	// session ID
 			p[1] = 18;
-			sprintf(p + 2, "%08X%08X", session[s].unique_id, session[s].opened);
+			sprintf((char *) p + 2, "%08X%08X", session[s].unique_id, session[s].opened);
 			p += p[1];
 			if (state == RADIUSSTART)
 			{			// start
@@ -265,13 +323,11 @@ void radiussend(uint16_t r, uint8_t state)
 				p[1] = 6;
 				*(uint32_t *) (p + 2) = htonl(session[s].cout);
 				p += p[1];
-				if (state == RADIUSSTOP)
-				{
-					*p = 46;	// session time
-					p[1] = 6;
-					*(uint32_t *) (p + 2) = htonl(time(NULL) - session[s].opened);
-					p += p[1];
-				}
+
+				*p = 46;	// session time
+				p[1] = 6;
+				*(uint32_t *) (p + 2) = htonl(time(NULL) - session[s].opened);
+				p += p[1];
 
 				*p = 47;	// input packets
 				p[1] = 6;
@@ -292,56 +348,113 @@ void radiussend(uint16_t r, uint8_t state)
 				p[1] = 6;
 				*(uint32_t *) (p + 2) = htonl(session[s].cout_wrap);
 				p += p[1];
-			}
 
-			if (session[s].snoop_ip && session[s].snoop_port)
-			{
-				*p = 26;				// vendor-specific
-				*(uint32_t *) (p + 2) = htonl(9);	// Cisco
-				p[6] = 1;				// Cisco-AVPair
-				p[7] = 2 + sprintf(p + 8, "intercept=%s:%d",
-					fmtaddr(session[s].snoop_ip, 0), session[s].snoop_port);
+				if (state == RADIUSSTOP && radius[r].term_cause)
+				{
+				    	*p = 49; // acct-terminate-cause
+					p[1] = 6;
+					*(uint32_t *) (p + 2) = htonl(radius[r].term_cause);
+					p += p[1];
 
-				p[1] = p[7] + 6;
+					if (radius[r].term_msg)
+					{
+						*p = 26;				// vendor-specific
+						*(uint32_t *) (p + 2) = htonl(9);	// Cisco
+						p[6] = 1;				// Cisco-AVPair
+						p[7] = 2 + sprintf((char *) p + 8, "disc-cause-ext=%s", radius[r].term_msg);
+						p[1] = p[7] + 6;
+						p += p[1];
+					}
+				}
+			}
+
+			if (session[s].classlen) {
+				*p = 25;	// class
+				p[1] = session[s].classlen + 2;
+				memcpy(p + 2, session[s].class, session[s].classlen);
 				p += p[1];
 			}
+
+			{
+				struct param_radius_account acct = { &tunnel[session[s].tunnel], &session[s], &p };
+				run_plugins(PLUGIN_RADIUS_ACCOUNT, &acct);
+			}
 		}
 	}
+
 	if (s)
 	{
-		*p = 5; // NAS-Port
+		*p = 5;		// NAS-Port
 		p[1] = 6;
 		*(uint32_t *) (p + 2) = htonl(s);
 		p += p[1];
-	}
-	if (s && session[s].ip)
-	{
-		*p = 8;			// Framed-IP-Address
+
+	        *p = 6;		// Service-Type
 		p[1] = 6;
-		*(uint32_t *) (p + 2) = htonl(session[s].ip);
+		*(uint32_t *) (p + 2) = htonl((state == RADIUSJUSTAUTH ? 8 : 2)); // Authenticate only or Framed-User respectevily
 		p += p[1];
-	}
-	if (*session[s].called)
-	{
-		*p = 30;                // called
-		p[1] = strlen(session[s].called) + 2;
-		strcpy(p + 2, session[s].called);
-		p += p[1];
-	}
-	if (*radius[r].calling)
-	{
-		*p = 31;                // calling
-		p[1] = strlen(radius[r].calling) + 2;
-		strcpy(p + 2, radius[r].calling);
-		p += p[1];
-	}
-	else if (*session[s].calling)
-	{
-		*p = 31;                // calling
-		p[1] = strlen(session[s].calling) + 2;
-		strcpy(p + 2, session[s].calling);
+		   
+	        *p = 7;		// Framed-Protocol
+		p[1] = htonl((state == RADIUSJUSTAUTH ? 0 : 6));
+		*(uint32_t *) (p + 2) = htonl((state == RADIUSJUSTAUTH ? 0 : 1)); // PPP
 		p += p[1];
+
+		if (session[s].ip)
+		{
+			*p = 8;			// Framed-IP-Address
+			p[1] = 6;
+			*(uint32_t *) (p + 2) = htonl(session[s].ip);
+			p += p[1];
+		}
+
+		if (session[s].route[0].ip)
+		{
+			int r;
+			for (r = 0; s && r < MAXROUTE && session[s].route[r].ip; r++)
+			{
+				*p = 22;	// Framed-Route
+				p[1] = sprintf((char *) p + 2, "%s/%d %s 1",
+					fmtaddr(htonl(session[s].route[r].ip), 0),
+					session[s].route[r].prefixlen,
+					fmtaddr(htonl(session[s].ip), 1)) + 2;
+
+				p += p[1];
+			}
+		}
+
+		if (session[s].session_timeout)
+		{
+			*p = 27;		// Session-Timeout
+			p[1] = 6;
+			*(uint32_t *) (p + 2) = htonl(session[s].session_timeout);
+			p += p[1];
+		}
+
+		if (session[s].idle_timeout)
+		{
+			*p = 28;		// Idle-Timeout
+			p[1] = 6;
+			*(uint32_t *) (p + 2) = htonl(session[s].idle_timeout);
+			p += p[1];
+		}
+
+		if (*session[s].called)
+		{
+			*p = 30;                // called
+			p[1] = strlen(session[s].called) + 2;
+			strcpy((char *) p + 2, session[s].called);
+			p += p[1];
+		}
+
+		if (*session[s].calling)
+		{
+			*p = 31;                // calling
+			p[1] = strlen(session[s].calling) + 2;
+			strcpy((char *) p + 2, session[s].calling);
+			p += p[1];
+		}
 	}
+
 	// NAS-IP-Address
 	*p = 4;
 	p[1] = 6;
@@ -350,20 +463,11 @@ void radiussend(uint16_t r, uint8_t state)
 
 	// All AVpairs added
 	*(uint16_t *) (b + 2) = htons(p - b);
-	if (state != RADIUSAUTH)
+	if (state != RADIUSAUTH && state != RADIUSJUSTAUTH)
 	{
-	    // Build auth for accounting packet
-	    char z[16] = {0};
-	    char hash[16] = {0};
-	    MD5_CTX ctx;
-	    MD5Init(&ctx);
-	    MD5Update(&ctx, b, 4);
-	    MD5Update(&ctx, z, 16);
-	    MD5Update(&ctx, b + 20, (p - b) - 20);
-	    MD5Update(&ctx, config->radiussecret, strlen(config->radiussecret));
-	    MD5Final(hash, &ctx);
-	    memcpy(b + 4, hash, 16);
-	    memcpy(radius[r].auth, hash, 16);
+		// Build auth for accounting packet
+		calc_auth(b, p - b, zero, b + 4);
+		memcpy(radius[r].auth, b + 4, 16);
 	}
 	memset(&addr, 0, sizeof(addr));
 	addr.sin_family = AF_INET;
@@ -372,7 +476,7 @@ void radiussend(uint16_t r, uint8_t state)
 		// get radius port
 		uint16_t port = config->radiusport[(radius[r].try - 1) % config->numradiusservers];
 		// assume RADIUS accounting port is the authentication port +1
-		addr.sin_port = htons((state == RADIUSAUTH) ? port : port+1);
+		addr.sin_port = htons((state == RADIUSAUTH || state == RADIUSJUSTAUTH) ? port : port+1);
 	}
 
 	LOG_HEX(5, "RADIUS Send", b, (p - b));
@@ -381,9 +485,9 @@ void radiussend(uint16_t r, uint8_t state)
 
 static void handle_avpair(sessionidt s, uint8_t *avp, int len)
 {
-	char *key = avp;
-	char *value = memchr(avp, '=', len);
-	char tmp[2048] = "";
+	uint8_t *key = avp;
+	uint8_t *value = memchr(avp, '=', len);
+	uint8_t tmp[2048] = "";
 
 	if (value)
 	{
@@ -415,7 +519,7 @@ static void handle_avpair(sessionidt s, uint8_t *avp, int len)
 	
 	// Run hooks
 	{
-		struct param_radius_response p = { &tunnel[session[s].tunnel], &session[s], key, value };
+		struct param_radius_response p = { &tunnel[session[s].tunnel], &session[s], (char *) key, (char *) value };
 		run_plugins(PLUGIN_RADIUS_RESPONSE, &p);
 	}
 }
@@ -423,8 +527,7 @@ static void handle_avpair(sessionidt s, uint8_t *avp, int len)
 // process RADIUS response
 void processrad(uint8_t *buf, int len, char socket_index)
 {
-	uint8_t b[MAXCONTROL];
-	MD5_CTX ctx;
+	uint8_t b[MAXETHER];
 	uint16_t r;
 	sessionidt s;
 	tunnelidt t = 0;
@@ -432,6 +535,7 @@ void processrad(uint8_t *buf, int len, char socket_index)
 	uint8_t routes = 0;
 	int r_code;
 	int r_id;
+	int OpentunnelReq = 0;
 
 	CSTAT(processrad);
 
@@ -456,19 +560,14 @@ void processrad(uint8_t *buf, int len, char socket_index)
 		LOG(1, s, session[s].tunnel, "   Unexpected RADIUS response\n");
 		return;
 	}
-	if (radius[r].state != RADIUSAUTH && radius[r].state != RADIUSSTART
+	if (radius[r].state != RADIUSAUTH && radius[r].state != RADIUSJUSTAUTH && radius[r].state != RADIUSSTART
 	    && radius[r].state != RADIUSSTOP && radius[r].state != RADIUSINTERIM)
 	{
 		LOG(1, s, session[s].tunnel, "   Unexpected RADIUS response\n");
 		return;
 	}
 	t = session[s].tunnel;
-	MD5Init(&ctx);
-	MD5Update(&ctx, buf, 4);
-	MD5Update(&ctx, radius[r].auth, 16);
-	MD5Update(&ctx, buf + 20, len - 20);
-	MD5Update(&ctx, config->radiussecret, strlen(config->radiussecret));
-	MD5Final(hash, &ctx);
+	calc_auth(buf, len, radius[r].auth, hash);
 	do {
 		if (memcmp(hash, buf + 4, 16))
 		{
@@ -476,7 +575,7 @@ void processrad(uint8_t *buf, int len, char socket_index)
 			return; // Do nothing. On timeout, it will try the next radius server.
 		}
 
-		if ((radius[r].state == RADIUSAUTH && r_code != AccessAccept && r_code != AccessReject) ||
+		if (((radius[r].state == RADIUSAUTH ||radius[r].state == RADIUSJUSTAUTH) && r_code != AccessAccept && r_code != AccessReject) ||
 			((radius[r].state == RADIUSSTART || radius[r].state == RADIUSSTOP || radius[r].state == RADIUSINTERIM) && r_code != AccountingResponse))
 		{
 			LOG(1, s, session[s].tunnel, "   Unexpected RADIUS response %s\n", radius_code(r_code));
@@ -484,7 +583,7 @@ void processrad(uint8_t *buf, int len, char socket_index)
 				// care off finishing the radius session if that's really correct.
 		}
 
-		if (radius[r].state == RADIUSAUTH)
+		if (radius[r].state == RADIUSAUTH || radius[r].state == RADIUSJUSTAUTH)
 		{
 			// run post-auth plugin
 			struct param_post_auth packet = {
@@ -498,46 +597,47 @@ void processrad(uint8_t *buf, int len, char socket_index)
 			run_plugins(PLUGIN_POST_AUTH, &packet);
 			r_code = packet.auth_allowed ? AccessAccept : AccessReject;
 
-			// process auth response
-			if (radius[r].chap)
-			{
-				// CHAP
-				uint8_t *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPCHAP);
-				if (!p) return;	// Abort!
-
-				*p = (r_code == AccessAccept) ? 3 : 4;     // ack/nak
-				p[1] = radius[r].id;
-				*(uint16_t *) (p + 2) = ntohs(4); // no message
-				tunnelsend(b, (p - b) + 4, t); // send it
-
-				LOG(3, s, session[s].tunnel, "   CHAP User %s authentication %s.\n", session[s].user,
-						(r_code == AccessAccept) ? "allowed" : "denied");
-			}
-			else
-			{
-				// PAP
-				uint8_t *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPPAP);
-				if (!p) return;		// Abort!
-
-				// ack/nak
-				*p = r_code;
-				p[1] = radius[r].id;
-				*(uint16_t *) (p + 2) = ntohs(5);
-				p[4] = 0; // no message
-				tunnelsend(b, (p - b) + 5, t); // send it
-
-				LOG(3, s, session[s].tunnel, "   PAP User %s authentication %s.\n", session[s].user,
-						(r_code == AccessAccept) ? "allowed" : "denied");
-			}
-
 			if (r_code == AccessAccept)
 			{
 				// Login successful
 				// Extract IP, routes, etc
 				uint8_t *p = buf + 20;
 				uint8_t *e = buf + len;
+				uint8_t tag;
+				uint8_t strtemp[256];
+				lac_reset_rad_tag_tunnel_ctxt();
+
 				for (; p + 2 <= e && p[1] && p + p[1] <= e; p += p[1])
 				{
+					if (*p == 26 && p[1] >= 7)
+					{
+						// Vendor-Specific Attribute
+						uint32_t vendor = ntohl(*(int *)(p + 2));
+						uint8_t attrib = *(p + 6);
+						int attrib_length = *(p + 7) - 2;
+
+						LOG(4, s, session[s].tunnel, "   Radius reply contains Vendor-Specific.  Vendor=%u Attrib=%u Length=%d\n", vendor, attrib, attrib_length);
+						if (vendor == 9 && attrib == 1) // Cisco-AVPair
+						{
+							if (attrib_length < 0) continue;
+							LOG(3, s, session[s].tunnel, "      Cisco-AVPair value: %.*s\n",
+								attrib_length, p + 8);
+
+							handle_avpair(s, p + 8, attrib_length);
+							continue;
+						}
+						else if (vendor == 529 && attrib >= 135 && attrib <= 136) // Ascend
+						{
+							// handle old-format ascend DNS attributes below
+						    	p += 6;
+						}
+						else
+						{
+							LOG(3, s, session[s].tunnel, "      Unknown vendor-specific\n");
+							continue;
+						}
+					}
+
 					if (*p == 8)
 					{
 						// Framed-IP-Address
@@ -569,7 +669,7 @@ void processrad(uint8_t *buf, int len, char socket_index)
 					else if (*p == 22)
 					{
 						// Framed-Route
-						in_addr_t ip = 0, mask = 0;
+						in_addr_t ip = 0;
 						uint8_t u = 0;
 						uint8_t bits = 0;
 						uint8_t *n = p + 2;
@@ -591,14 +691,13 @@ void processrad(uint8_t *buf, int len, char socket_index)
 							n++;
 							while (n < e && isdigit(*n))
 								bits = bits * 10 + *n++ - '0';
-							mask = (( -1) << (32 - bits));
 						}
 						else if ((ip >> 24) < 128)
-							mask = 0xFF0000;
+							bits = 8;
 						else if ((ip >> 24) < 192)
-							mask = 0xFFFF0000;
+							bits = 16;
 						else
-							mask = 0xFFFFFF00;
+							bits = 24;
 
 						if (routes == MAXROUTE)
 						{
@@ -606,18 +705,18 @@ void processrad(uint8_t *buf, int len, char socket_index)
 						}
 						else if (ip)
 						{
-							LOG(3, s, session[s].tunnel, "   Radius reply contains route for %s/%s\n",
-								fmtaddr(htonl(ip), 0), fmtaddr(htonl(mask), 1));
+							LOG(3, s, session[s].tunnel, "   Radius reply contains route for %s/%d\n",
+								fmtaddr(htonl(ip), 0), bits);
 							
 							session[s].route[routes].ip = ip;
-							session[s].route[routes].mask = mask;
+							session[s].route[routes].prefixlen = bits;
 							routes++;
 						}
 					}
 					else if (*p == 11)
 					{
 					    	// Filter-Id
-					    	char *filter = p + 2;
+					    	char *filter = (char *) p + 2;
 						int l = p[1] - 2;
 						char *suffix;
 						int f;
@@ -651,27 +750,21 @@ void processrad(uint8_t *buf, int len, char socket_index)
 							ip_filters[f].used++;
 						}
 					}
-					else if (*p == 26 && p[1] >= 7)
+					else if (*p == 27)
 					{
-						// Vendor-Specific Attribute
-						int vendor = ntohl(*(int *)(p + 2));
-						char attrib = *(p + 6);
-						int attrib_length = *(p + 7) - 2;
-
-						LOG(3, s, session[s].tunnel, "   Radius reply contains Vendor-Specific.  Vendor=%d Attrib=%d Length=%d\n", vendor, attrib, attrib_length);
-						if (vendor != 9 || attrib != 1)
-						{
-							LOG(3, s, session[s].tunnel, "      Unknown vendor-specific\n");
-							continue;
-						}
-
-						if (attrib_length > 0)
-						{
-							LOG(3, s, session[s].tunnel, "      Cisco-AVPair value: %.*s\n",
-								attrib_length, p + 8);
-
-							handle_avpair(s, p + 8, attrib_length);
-						}
+					    	// Session-Timeout
+					    	if (p[1] < 6) continue;
+						session[s].session_timeout = ntohl(*(uint32_t *)(p + 2));
+						LOG(3, s, session[s].tunnel, "   Radius reply contains Session-Timeout = %u\n", session[s].session_timeout);
+						if(!session[s].session_timeout && config->kill_timedout_sessions)
+                                                        sessionshutdown(s, "Session timeout is zero", CDN_ADMIN_DISC, 0);
+					}
+					else if (*p == 28)
+					{
+					    	// Idle-Timeout
+					    	if (p[1] < 6) continue;
+						session[s].idle_timeout = ntohl(*(uint32_t *)(p + 2));
+						LOG(3, s, session[s].tunnel, "   Radius reply contains Idle-Timeout = %u\n", session[s].idle_timeout);
 					}
 					else if (*p == 99)
 					{
@@ -680,10 +773,10 @@ void processrad(uint8_t *buf, int len, char socket_index)
 						int prefixlen;
 						uint8_t *n = p + 2;
 						uint8_t *e = p + p[1];
-						uint8_t *m = strchr(n, '/');
+						uint8_t *m = memchr(n, '/', e - p);
 
 						*m++ = 0;
-						inet_pton(AF_INET6, n, &r6);
+						inet_pton(AF_INET6, (char *) n, &r6);
 
 						prefixlen = 0;
 						while (m < e && isdigit(*m)) {
@@ -699,6 +792,103 @@ void processrad(uint8_t *buf, int len, char socket_index)
 							session[s].ipv6prefixlen = prefixlen;
 						}
 					}
+					else if (*p == 25)
+					{
+						// Class
+						if (p[1] < 3) continue;
+						session[s].classlen = p[1] - 2;
+						if (session[s].classlen > MAXCLASS)
+							session[s].classlen = MAXCLASS;
+						memcpy(session[s].class, p + 2, session[s].classlen);
+					}
+					else if (*p == 64)
+					{
+						// Tunnel-Type
+						if (p[1] != 6) continue;
+						tag = p[2];
+						LOG(3, s, session[s].tunnel, "   Radius reply Tunnel-Type:%d %d\n",
+							tag, ntohl(*(uint32_t *)(p + 2)) & 0xFFFFFF);
+						// Fill context
+						lac_set_rad_tag_tunnel_type(tag, ntohl(*(uint32_t *)(p + 2)) & 0xFFFFFF);
+						/* Request open tunnel to remote LNS*/
+						OpentunnelReq = 1;
+					}
+					else if (*p == 65)
+					{
+						// Tunnel-Medium-Type
+						if (p[1] < 6) continue;
+						tag = p[2];
+						LOG(3, s, session[s].tunnel, "   Radius reply Tunnel-Medium-Type:%d %d\n",
+							tag, ntohl(*(uint32_t *)(p + 2)) & 0xFFFFFF);
+						// Fill context
+						lac_set_rad_tag_tunnel_medium_type(tag, ntohl(*(uint32_t *)(p + 2)) & 0xFFFFFF);
+					}
+					else if (*p == 67)
+					{
+						// Tunnel-Server-Endpoint
+						if (p[1] < 3) continue;
+						tag = p[2];
+						//If the Tag field is greater than 0x1F,
+						// it SHOULD be interpreted as the first byte of the following String field.
+						memset(strtemp, 0, 256);
+						if (tag > 0x1F)
+						{
+							tag = 0;
+							memcpy(strtemp, (p + 2), p[1]-2);
+						}
+						else
+							memcpy(strtemp, (p + 3), p[1]-3);
+
+						LOG(3, s, session[s].tunnel, "   Radius reply Tunnel-Server-Endpoint:%d %s\n", tag, strtemp);
+						// Fill context
+						lac_set_rad_tag_tunnel_serv_endpt(tag, (char *) strtemp);
+					}
+					else if (*p == 69)
+					{
+						// Tunnel-Password
+						size_t lentemp;
+
+						if (p[1] < 5) continue;
+						tag = p[2];
+
+						memset(strtemp, 0, 256);
+						lentemp = p[1]-3;
+						memcpy(strtemp, (p + 3), lentemp);
+						if (!rad_tunnel_pwdecode(strtemp, &lentemp, config->radiussecret, radius[r].auth))
+						{
+							LOG_HEX(3, "Error Decode Tunnel-Password, Dump Radius reponse:", p, p[1]);
+							continue;
+						}
+
+						LOG(3, s, session[s].tunnel, "   Radius reply Tunnel-Password:%d %s\n", tag, strtemp);
+						if (strlen((char *) strtemp) > 63)
+						{
+							LOG(1, s, session[s].tunnel, "tunnel password is too long (>63)\n");
+							continue;
+						}
+						// Fill context
+						lac_set_rad_tag_tunnel_password(tag, (char *) strtemp);
+					}
+					else if (*p == 82)
+					{
+						// Tunnel-Assignment-Id
+						if (p[1] < 3) continue;
+						tag = p[2];
+						//If the Tag field is greater than 0x1F,
+						// it SHOULD be interpreted as the first byte of the following String field.
+						memset(strtemp, 0, 256);
+						if (tag > 0x1F)
+						{
+							tag = 0;
+							memcpy(strtemp, (p + 2), p[1]-2);
+						}
+						else
+							memcpy(strtemp, (p + 3), p[1]-3);
+
+						LOG(3, s, session[s].tunnel, "   Radius reply Tunnel-Assignment-Id:%d %s\n", tag, strtemp);
+						// Fill context
+						lac_set_rad_tag_tunnel_assignment_id(tag, (char *) strtemp);
+					}
 				}
 			}
 			else if (r_code == AccessReject)
@@ -708,20 +898,77 @@ void processrad(uint8_t *buf, int len, char socket_index)
 				break;
 			}
 
+			if ((!config->disable_lac_func) && OpentunnelReq)
+			{
+				char assignment_id[256];
+				// Save radius tag context to conf
+				lac_save_rad_tag_tunnels(s);
+
+				memset(assignment_id, 0, 256);
+				if (!lac_rad_select_assignment_id(s, assignment_id))
+					break; // Error no assignment_id
+
+				LOG(3, s, session[s].tunnel, "Select Tunnel Remote LNS for assignment_id == %s\n", assignment_id);
+
+				if (lac_rad_forwardtoremotelns(s, assignment_id, session[s].user))
+				{
+					int ro;
+					// Sanity check, no local IP to session forwarded
+					session[s].ip = 0;
+					for (ro = 0; r < MAXROUTE && session[s].route[ro].ip; r++)
+					{
+						session[s].route[ro].ip = 0;
+					}
+					break;
+				}
+			}
+
+			// process auth response
+			if (radius[r].chap)
+			{
+				// CHAP
+				uint8_t *p = makeppp(b, sizeof(b), 0, 0, s, t, PPPCHAP, 0, 0, 0);
+				if (!p) return;	// Abort!
+
+				*p = (r_code == AccessAccept) ? 3 : 4;     // ack/nak
+				p[1] = radius[r].id;
+				*(uint16_t *) (p + 2) = ntohs(4); // no message
+				tunnelsend(b, (p - b) + 4, t); // send it
+
+				LOG(3, s, session[s].tunnel, "   CHAP User %s authentication %s.\n", session[s].user,
+						(r_code == AccessAccept) ? "allowed" : "denied");
+			}
+			else
+			{
+				// PAP
+				uint8_t *p = makeppp(b, sizeof(b), 0, 0, s, t, PPPPAP, 0, 0, 0);
+				if (!p) return;		// Abort!
+
+				// ack/nak
+				*p = r_code;
+				p[1] = radius[r].id;
+				*(uint16_t *) (p + 2) = ntohs(5);
+				p[4] = 0; // no message
+				tunnelsend(b, (p - b) + 5, t); // send it
+
+				LOG(3, s, session[s].tunnel, "   PAP User %s authentication %s.\n", session[s].user,
+						(r_code == AccessAccept) ? "allowed" : "denied");
+			}
+
 			if (!session[s].dns1 && config->default_dns1)
 			{
-				session[s].dns1 = htonl(config->default_dns1);
+				session[s].dns1 = ntohl(config->default_dns1);
 				LOG(3, s, t, "   Sending dns1 = %s\n", fmtaddr(config->default_dns1, 0));
 			}
 			if (!session[s].dns2 && config->default_dns2)
 			{
-				session[s].dns2 = htonl(config->default_dns2);
+				session[s].dns2 = ntohl(config->default_dns2);
 				LOG(3, s, t, "   Sending dns2 = %s\n", fmtaddr(config->default_dns2, 0));
 			}
 
 			// Valid Session, set it up
 			session[s].unique_id = 0;
-			sessionsetup(t, s);
+			sessionsetup(s, t);
 		}
 		else
 		{
@@ -748,22 +995,14 @@ void radiusretry(uint16_t r)
 	switch (radius[r].state)
 	{
 		case RADIUSCHAP:	// sending CHAP down PPP
-			sendchap(t, s);
-			break;
-		case RADIUSIPCP:
-			sendipcp(t, s);	// send IPCP
+			sendchap(s, t);
 			break;
 		case RADIUSAUTH:	// sending auth to RADIUS server
-			radiussend(r, RADIUSAUTH);
-			break;
+		case RADIUSJUSTAUTH:	// sending auth to RADIUS server
 		case RADIUSSTART:	// sending start accounting to RADIUS server
-			radiussend(r, RADIUSSTART);
-			break;
 		case RADIUSSTOP:	// sending stop accounting to RADIUS server
-			radiussend(r, RADIUSSTOP);
-			break;
 		case RADIUSINTERIM:	// sending interim accounting to RADIUS server
-			radiussend(r, RADIUSINTERIM);
+			radiussend(r, radius[r].state);
 			break;
 		default:
 		case RADIUSNULL:	// Not in use
@@ -777,11 +1016,11 @@ void radiusretry(uint16_t r)
 
 extern int daefd;
 
-void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen)
+void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen, struct in_addr *local)
 {
 	int i, r_code, r_id, length, attribute_length;
-	uint8_t vector[16], hash[16], *packet, attribute;
-	MD5_CTX ctx;
+	uint8_t *packet, attribute;
+	hasht hash;
 	char username[MAXUSER] = "";
 	in_addr_t nas = 0;
 	in_addr_t ip = 0;
@@ -826,17 +1065,8 @@ void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen)
 	LOG(3, 0, 0, "Received DAE %s, id %d\n", radius_code(r_code), r_id);
 
 	// check authenticator
-	memcpy(vector, buf + 4, 16);
-	memset(buf + 4, 0, 16);
-
-	i = strlen(config->radiussecret);
-	if (i > 16) i = 16;
-
-	MD5Init(&ctx);
-	MD5Update(&ctx, buf, len);
-	MD5Update(&ctx, buf, config->radiussecret, i);
-	MD5Final(hash, &ctx);
-	if (memcmp(hash, vector, 16) != 0)
+	calc_auth(buf, len, zero, hash);
+	if (memcmp(hash, buf + 4, 16) != 0)
 	{
 		LOG(1, 0, 0, "Incorrect vector in DAE request (wrong secret in radius config?)\n");
 		return;
@@ -903,7 +1133,7 @@ void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen)
 			}
 
 			len = p - packet;
-			i = find_filter(packet, len);
+			i = find_filter((char *) packet, len);
 			if (i < 0 || !*ip_filters[i].name)
 			{
 				error = 404;
@@ -995,7 +1225,7 @@ void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen)
 		LOG(3, s, t, "    DAE Disconnect %d (%s)\n", s, session[s].user);
 		r_code = DisconnectACK;
 
-		sessionshutdown(s, "Requested by PoD", 3, 0); // disconnect session
+		sessionshutdown(s, "Requested by PoD", CDN_ADMIN_DISC, TERM_ADMIN_RESET); // disconnect session
 		break;
 
 	case CoARequest: // Change of Authorization
@@ -1042,10 +1272,9 @@ void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen)
 	packet = buf;
 	*packet++ = r_code;
 	*packet++ = r_id;
-	packet += 2;
-	memset(packet, 0, 16);
-	packet += 16;
-	len = 20;
+	// skip len + auth
+	packet += 2 + 16;
+	len = packet - buf;
 
 	// add attributes
 	if (error)
@@ -1060,18 +1289,102 @@ void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen)
 	*((uint16_t *)(buf + 2)) = htons(len);
 
 	// make vector
-	i = strlen(config->radiussecret);
-	if (i > 16) i = 16;
-
-	MD5Init(&ctx);
-	MD5Update(&ctx, buf, len);
-	MD5Update(&ctx, config->radiussecret, i);
-	MD5Final(hash, &ctx);
-	memcpy(buf + 4, hash, 16);
+	calc_auth(buf, len, hash, buf + 4);
 
 	LOG(3, 0, 0, "Sending DAE %s, id=%d\n", radius_code(r_code), r_id);
 
 	// send DAE response
-	if (sendto(daefd, buf, len, MSG_DONTWAIT | MSG_NOSIGNAL, (struct sockaddr *) addr, alen) < 0)
+	if (sendtofrom(daefd, buf, len, MSG_DONTWAIT | MSG_NOSIGNAL, (struct sockaddr *) addr, alen, local) < 0)
 		LOG(0, 0, 0, "Error sending DAE response packet: %s\n", strerror(errno));
 }
+
+// Decrypte the encrypted Tunnel Password.
+// Defined in RFC-2868.
+// the pl2tpsecret buffer must set to 256 characters.
+// return 0 on decoding error else length of decoded l2tpsecret
+int rad_tunnel_pwdecode(uint8_t *pl2tpsecret, size_t *pl2tpsecretlen,
+						const char *radiussecret, const uint8_t * auth)
+{
+	MD5_CTX ctx, oldctx;
+	hasht hash;
+	int secretlen;
+	unsigned i, n, len, decodedlen;
+
+/* 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 6 7
+* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+  |     Salt      |     Salt      |   String ..........
+  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+*/
+
+	len = *pl2tpsecretlen;
+
+	if (len < 2)
+	{
+		LOG(1, 0, 0, "tunnel password is too short, We need at least a salt\n");
+		return 0;
+	}
+
+	if (len <= 3)
+	{
+		pl2tpsecret[0] = 0;
+		*pl2tpsecretlen = 0;
+		LOG(1, 0, 0, "tunnel passwd is empty !!!\n");
+		return 0;
+	}
+
+	len -= 2;	/* discount the salt */
+
+	//Use the secret to setup the decryption
+	secretlen = strlen(radiussecret);
+
+	MD5_Init(&ctx);
+	MD5_Update(&ctx, (void *) radiussecret, secretlen);
+	oldctx = ctx;	/* save intermediate work */
+
+	// Set up the initial key:
+	//	b(1) = MD5(radiussecret + auth + salt)
+	MD5_Update(&ctx, (void *) auth, 16);
+	MD5_Update(&ctx, pl2tpsecret, 2);
+
+	decodedlen = 0;
+	for (n = 0; n < len; n += 16)
+	{
+		int base = 0;
+
+		if (n == 0)
+		{
+			MD5_Final(hash, &ctx);
+
+			ctx = oldctx;
+
+			 // the first octet, it's the 'data_len'
+			 // Check is correct
+			decodedlen = pl2tpsecret[2] ^ hash[0];
+			if (decodedlen >= len)
+			{
+				LOG(1, 0, 0, "tunnel password is too long !!!\n");
+				return 0;
+			}
+
+			MD5_Update(&ctx, pl2tpsecret + 2, 16);
+			base = 1;
+		} else
+		{
+			MD5_Final(hash, &ctx);
+
+			ctx = oldctx;
+			MD5_Update(&ctx, pl2tpsecret + n + 2, 16);
+		}
+
+		for (i = base; i < 16; i++)
+		{
+			pl2tpsecret[n + i - 1] = pl2tpsecret[n + i + 2] ^ hash[i];
+		}
+	}
+
+	if (decodedlen > 239) decodedlen = 239;
+
+	*pl2tpsecretlen = decodedlen;
+	pl2tpsecret[decodedlen] = 0;
+
+	return decodedlen;
+};