X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/04879a503b4cb4b4dd502ccf436c1c0e910df2bf..b72f38af1b12d664f063a5929c5b7f637e66c095:/radius.c

diff --git a/radius.c b/radius.c
index c388ac3..dd8a3e6 100644
--- a/radius.c
+++ b/radius.c
@@ -1,6 +1,6 @@
 // L2TPNS Radius Stuff
 
-char const *cvs_id_radius = "$Id: radius.c,v 1.40 2005/08/12 13:48:19 bodea Exp $";
+char const *cvs_id_radius = "$Id: radius.c,v 1.50 2006/04/27 09:53:50 bodea Exp $";
 
 #include <time.h>
 #include <stdio.h>
@@ -27,6 +27,20 @@ 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)
 {
@@ -144,7 +158,7 @@ void radiussend(uint16_t r, uint8_t state)
 		if (s)
 		{
 			if (state == RADIUSAUTH)
-				sessionshutdown(s, "RADIUS timeout.", 3, 0);
+				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",
@@ -234,8 +248,8 @@ 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
@@ -290,27 +304,48 @@ void radiussend(uint16_t r, uint8_t state)
 				p[1] = 6;
 				*(uint32_t *) (p + 2) = htonl(session[s].cout_wrap);
 				p += p[1];
+
+				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];
+
+					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].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((char *) p + 8, "intercept=%s:%d",
-					fmtaddr(session[s].snoop_ip, 0), session[s].snoop_port);
-
-				p[1] = p[7] + 6;
-				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];
+
+	        *p = 6;		// Service-Type
+		p[1] = 6;
+		*(uint32_t *) (p + 2) = htonl(2); // Framed-User
+		p += p[1];
+		   
+	        *p = 7;		// Framed-Protocol
+		p[1] = 6;
+		*(uint32_t *) (p + 2) = htonl(1); // PPP
+		p += p[1];
 	}
 	if (s && session[s].ip)
 	{
@@ -319,6 +354,30 @@ void radiussend(uint16_t r, uint8_t state)
 		*(uint32_t *) (p + 2) = htonl(session[s].ip);
 		p += p[1];
 	}
+	if (s && session[s].route[0].ip)
+	{
+		int r;
+		for (r = 0; s && r < MAXROUTE && session[s].route[r].ip; r++)
+		{
+		    	int width = 32;
+			if (session[s].route[r].mask)
+			{
+			    int mask = session[s].route[r].mask;
+			    while (!(mask & 1))
+			    {
+				width--;
+				mask >>= 1;
+			    }
+			}
+
+			*p = 22;	// Framed-Route
+			p[1] = sprintf((char *) p + 2, "%s/%d %s 1",
+				fmtaddr(htonl(session[s].route[r].ip), 0),
+				width, fmtaddr(htonl(session[s].ip), 1)) + 2;
+
+			p += p[1];
+		}
+	}
 	if (*session[s].called)
 	{
 		*p = 30;                // called
@@ -326,7 +385,7 @@ void radiussend(uint16_t r, uint8_t state)
 		strcpy((char *) p + 2, session[s].called);
 		p += p[1];
 	}
-	else if (*session[s].calling)
+	if (*session[s].calling)
 	{
 		*p = 31;                // calling
 		p[1] = strlen(session[s].calling) + 2;
@@ -343,18 +402,9 @@ void radiussend(uint16_t r, uint8_t state)
 	*(uint16_t *) (b + 2) = htons(p - b);
 	if (state != RADIUSAUTH)
 	{
-	    // Build auth for accounting packet
-	    uint8_t z[16] = {0};
-	    uint8_t hash[16] = {0};
-	    MD5_CTX ctx;
-	    MD5_Init(&ctx);
-	    MD5_Update(&ctx, b, 4);
-	    MD5_Update(&ctx, z, 16);
-	    MD5_Update(&ctx, b + 20, (p - b) - 20);
-	    MD5_Update(&ctx, config->radiussecret, strlen(config->radiussecret));
-	    MD5_Final(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;
@@ -414,8 +464,7 @@ 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;
@@ -454,12 +503,7 @@ void processrad(uint8_t *buf, int len, char socket_index)
 		return;
 	}
 	t = session[s].tunnel;
-	MD5_Init(&ctx);
-	MD5_Update(&ctx, buf, 4);
-	MD5_Update(&ctx, radius[r].auth, 16);
-	MD5_Update(&ctx, buf + 20, len - 20);
-	MD5_Update(&ctx, config->radiussecret, strlen(config->radiussecret));
-	MD5_Final(hash, &ctx);
+	calc_auth(buf, len, radius[r].auth, hash);
 	do {
 		if (memcmp(hash, buf + 4, 16))
 		{
@@ -493,7 +537,7 @@ void processrad(uint8_t *buf, int len, char socket_index)
 			if (radius[r].chap)
 			{
 				// CHAP
-				uint8_t *p = makeppp(b, sizeof(b), 0, 0, s, t, PPPCHAP);
+				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
@@ -507,7 +551,7 @@ void processrad(uint8_t *buf, int len, char socket_index)
 			else
 			{
 				// PAP
-				uint8_t *p = makeppp(b, sizeof(b), 0, 0, s, t, PPPPAP);
+				uint8_t *p = makeppp(b, sizeof(b), 0, 0, s, t, PPPPAP, 0, 0, 0);
 				if (!p) return;		// Abort!
 
 				// ack/nak
@@ -549,6 +593,19 @@ void processrad(uint8_t *buf, int len, char socket_index)
 						LOG(3, s, session[s].tunnel, "   Radius reply contains primary DNS address %s\n",
 							fmtaddr(htonl(session[s].dns1), 0));
 					}
+					else if (*p == 27)
+					{
+						// Session timeout
+					    	if (p[1] < 6) {
+							LOG(2, s, session[s].tunnel, "Error: Received Session timeout with length %d < 6\n", p[1]);
+							continue;
+						}
+
+						session[s].timeout = ntohl(*(uint32_t *) (p + 2));
+						LOG(3, s, session[s].tunnel, "   Radius reply contains Session timeout %d\n", session[s].timeout);
+						if (!session[s].timeout)
+							sessionshutdown(s, "Session timeout is zero", CDN_ADMIN_DISC, TERM_SESSION_TIMEOUT);
+					}
 					else if (*p == 136)
 					{
 						// DNS address
@@ -759,11 +816,11 @@ 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;
@@ -808,17 +865,8 @@ 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;
-
-	MD5_Init(&ctx);
-	MD5_Update(&ctx, buf, len);
-	MD5_Update(&ctx, config->radiussecret, i);
-	MD5_Final(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;
@@ -977,7 +1025,7 @@ 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
@@ -1024,10 +1072,9 @@ 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)
@@ -1042,18 +1089,11 @@ 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;
-
-	MD5_Init(&ctx);
-	MD5_Update(&ctx, buf, len);
-	MD5_Update(&ctx, config->radiussecret, i);
-	MD5_Final(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));
 }