X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/97ad99cc23c5f0007de461afb200fd83c3d20481..81bc9de9ded5dea5d766866429a965e03fdb367b:/ppp.c

diff --git a/ppp.c b/ppp.c
index 074e00f..4de5ba7 100644
--- a/ppp.c
+++ b/ppp.c
@@ -1,6 +1,6 @@
 // L2TPNS PPP Stuff
 
-char const *cvs_id_ppp = "$Id: ppp.c,v 1.42 2005/01/25 04:19:06 bodea Exp $";
+char const *cvs_id_ppp = "$Id: ppp.c,v 1.47 2005/04/27 13:53:17 bodea Exp $";
 
 #include <stdio.h>
 #include <string.h>
@@ -28,8 +28,8 @@ static void initccp(tunnelidt t, sessionidt s);
 // Process PAP messages
 void processpap(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l)
 {
-	char user[129];
-	char pass[129];
+	char user[MAXUSER];
+	char pass[MAXPASS];
 	uint16_t hl;
 
 	CSTAT(processpap);
@@ -39,6 +39,7 @@ void processpap(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l)
 	{
 		LOG(1, s, t, "Short PAP %u bytes\n", l);
 		STAT(tunnel_rx_errors);
+		sessionshutdown(s, "Short PAP packet.", 3, 0);
 		return ;
 	}
 
@@ -46,6 +47,7 @@ void processpap(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l)
 	{
 		LOG(1, s, t, "Length mismatch PAP %u/%u\n", hl, l);
 		STAT(tunnel_rx_errors);
+		sessionshutdown(s, "PAP length mismatch.", 3, 0);
 		return ;
 	}
 	l = hl;
@@ -54,19 +56,25 @@ void processpap(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l)
 	{
 		LOG(1, s, t, "Unexpected PAP code %d\n", *p);
 		STAT(tunnel_rx_errors);
+		sessionshutdown(s, "Unexpected PAP code.", 3, 0);
 		return ;
 	}
 
 	{
 		uint8_t *b = p;
 		b += 4;
+		user[0] = pass[0] = 0;
 		if (*b && *b < sizeof(user))
+		{
 			memcpy(user, b + 1, *b);
-		user[*b] = 0;
-		b += 1 + *b;
-		if (*b && *b < sizeof(pass))
-			memcpy(pass, b + 1, *b);
-		pass[*b] = 0;
+			user[*b] = 0;
+			b += 1 + *b;
+			if (*b && *b < sizeof(pass))
+			{
+				memcpy(pass, b + 1, *b);
+				pass[*b] = 0;
+			}
+		}
 		LOG(3, s, t, "PAP login %s/%s\n", user, pass);
 	}
 	if (session[s].ip || !session[s].radius)
@@ -97,6 +105,7 @@ void processpap(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l)
 		}
 		LOG(3, s, t, "Fallback response to PAP (%s)\n", (session[s].ip) ? "ACK" : "NAK");
 		tunnelsend(b, 5 + (p - b), t); // send it
+		sessionshutdown(s, "PAP authentication failed.", 3, 0);
 	}
 	else
 	{
@@ -483,11 +492,11 @@ void processlcp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l)
 		q = makeppp(b, sizeof(b),  p, l, t, s, PPPLCP);
 		if (!q) return;
 		tunnelsend(b, l + (q - b), t); // send it
-		sessionshutdown(s, "Remote end closed connection.");
+		sessionshutdown(s, "Remote end closed connection.", 3, 0);
 	}
 	else if (*p == TerminateAck)
 	{
-		sessionshutdown(s, "Connection closed.");
+		sessionshutdown(s, "Connection closed.", 3, 0);
 	}
 	else if (*p == ProtocolRej)
 	{
@@ -852,15 +861,19 @@ void processipin(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l)
 
 	// Add on the tun header
 	p -= 4;
-	*(uint32_t *) p = htonl(0x00000800);
+	*(uint32_t *) p = htonl(PKTIP);
 	l += 4;
 
-	if (session[s].tbf_in && !config->cluster_iam_master) { // Are we throttled and a slave?
-		master_throttle_packet(session[s].tbf_in, p, l); // Pass it to the master for handling.
+	// Are we throttled and a slave?
+	if (session[s].tbf_in && !config->cluster_iam_master) {
+		// Pass it to the master for handling.
+		master_throttle_packet(session[s].tbf_in, p, l);
 		return;
 	}
 
-	if (session[s].tbf_in && config->cluster_iam_master) { // Are we throttled and a master?? actually handle the throttled packets.
+	// Are we throttled and a master??
+	if (session[s].tbf_in && config->cluster_iam_master) {
+		// Actually handle the throttled packets.
 		tbf_queue_packet(session[s].tbf_in, p, l);
 		return;
 	}
@@ -936,7 +949,7 @@ void processipv6in(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l)
 
 	// Add on the tun header
 	p -= 4;
-	*(uint32_t *)p = htonl(PKTIPV6);
+	*(uint32_t *) p = htonl(PKTIPV6);
 	l += 4;
 
 	// Are we throttled and a slave?
@@ -946,9 +959,9 @@ void processipv6in(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l)
 		return;
 	}
 
-	// Are we throttled and a master?? actually handle the throttled
-	// packets.
+	// Are we throttled and a master??
 	if (session[s].tbf_in && config->cluster_iam_master) {
+		// Actually handle the throttled packets.
 		tbf_queue_packet(session[s].tbf_in, p, l);
 		return;
 	}
@@ -957,14 +970,16 @@ void processipv6in(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l)
 	if (tun_write(p, l) < 0)
 	{
 		STAT(tun_tx_errors);
-		LOG(0, s, t, "Error writing %d bytes to TUN device: %s" " (tunfd=%d, p=%p)\n",
+		LOG(0, s, t, "Error writing %d bytes to TUN device: %s (tunfd=%d, p=%p)\n",
 			l, strerror(errno), tunfd, p);
+
+		return;
 	}
 
 	if (session[s].snoop_ip && session[s].snoop_port)
 	{
 		// Snooping this session
-		snoop_send_packet(p, l, session[s].snoop_ip, session[s].snoop_port);
+		snoop_send_packet(p + 4, l - 4, session[s].snoop_ip, session[s].snoop_port);
 	}
 
 	session[s].cin += l - 4;
@@ -1065,12 +1080,13 @@ void processccp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l)
 	tunnelsend(b, l + (q - b), t); // send it
 }
 
-// send a CHAP PP packet
+// send a CHAP challenge
 void sendchap(tunnelidt t, sessionidt s)
 {
 	uint8_t b[MAXCONTROL];
 	uint16_t r = session[s].radius;
 	uint8_t *q;
+	uint8_t *l;
 
 	CSTAT(sendchap);
 
@@ -1094,7 +1110,7 @@ void sendchap(tunnelidt t, sessionidt s)
 	radius[r].retry = backoff(radius[r].try++);
 	if (radius[r].try > 5)
 	{
-		sessionshutdown(s, "Timeout CHAP");
+		sessionshutdown(s, "CHAP timeout.", 3, 0);
 		STAT(tunnel_tx_errors);
 		return ;
 	}
@@ -1103,7 +1119,7 @@ void sendchap(tunnelidt t, sessionidt s)
 
 	*q = 1;					// challenge
 	q[1] = radius[r].id;			// ID
-	q[4] = 16;				// length
+	q[4] = 16;				// value size (size of challenge)
 	memcpy(q + 5, radius[r].auth, 16);	// challenge
 	strcpy(q + 21, hostname);		// our name
 	*(uint16_t *) (q + 2) = htons(strlen(hostname) + 21); // length