X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/9cb7003d3390c34d3f01bb10fe5542d433ae99de..e55b28c1072ab3a97df1d6a69b293fc34af3a591:/l2tpns.h

diff --git a/l2tpns.h b/l2tpns.h
index ee5fe4a..0460a38 100644
--- a/l2tpns.h
+++ b/l2tpns.h
@@ -1,5 +1,5 @@
 // L2TPNS Global Stuff
-// $Id: l2tpns.h,v 1.50 2004/12/18 01:20:05 bodea Exp $
+// $Id: l2tpns.h,v 1.53 2005/01/13 07:57:39 bodea Exp $
 
 #ifndef __L2TPNS_H__
 #define __L2TPNS_H__
@@ -72,6 +72,7 @@
 #endif
 
 #define TUNDEVICE	"/dev/net/tun"
+#define RANDOMDEVICE	"/dev/urandom"			// default, not as secure as /dev/random but non-blocking
 #define STATEFILE	DATADIR "/state.dump"		// State dump file
 #define CONFIGFILE	FLASHDIR "/startup-config"	// Configuration file
 #define CLIUSERS	FLASHDIR "/users"		// CLI Users file
@@ -93,8 +94,8 @@
 #define PPPIPV6		0x0057
 #define PPPMP		0x003D
 #define MIN_IP_SIZE	0x19
-enum
-{
+
+enum {
 	ConfigReq = 1,
 	ConfigAck,
 	ConfigNak,
@@ -109,6 +110,15 @@ enum
 	IdentRequest
 };
 
+enum {
+	AccessRequest = 1,
+	AccessAccept,
+	AccessReject,
+	AccountingRequest,
+	AccountingResponse,
+	AccessChallenge = 11
+};
+
 // Types
 typedef uint16_t sessionidt;
 typedef uint16_t tunnelidt;
@@ -213,11 +223,20 @@ sessiont;
 #define SF_IPV6CP_ACKED	8	// IPv6 negotiated
 #define SF_IPV6_NACKED	16	// IPv6 rejected
 
+#define AUTHPAP		1	// allow PAP
+#define AUTHCHAP	2	// allow CHAP
+
 typedef struct
 {
+	// byte counters
 	uint32_t cin;
 	uint32_t cout;
-} sessioncountt;
+
+	// DoS prevention
+	clockt last_packet_out;
+	uint32_t packets_out;
+	uint32_t packets_dropped;
+} sessionlocalt;
 
 #define	SESSIONPFC	1	// PFC negotiated flags
 #define	SESSIONACFC	2	// ACFC negotiated flags
@@ -320,6 +339,7 @@ struct Tstats
     uint32_t	tun_tx_bytes;
     uint32_t	tun_rx_errors;
     uint32_t	tun_tx_errors;
+    uint32_t	tun_rx_dropped;
 
     uint32_t	tunnel_rx_packets;
     uint32_t	tunnel_tx_packets;
@@ -381,13 +401,14 @@ struct Tstats
     uint32_t	call_processrad;
     uint32_t	call_radiussend;
     uint32_t	call_radiusretry;
+    uint32_t    call_random_data;
 #endif
 };
 
 #ifdef STATISTICS
 
 #ifdef STAT_CALLS
-#define CSTAT(x)	STAT(x)
+#define CSTAT(x)	STAT(call_ ## x)
 #else
 #define CSTAT(x)
 #endif
@@ -424,6 +445,8 @@ typedef struct
 	char		log_filename[128];
 	char		l2tpsecret[64];
 
+	char		random_device[256];		// random device path, defaults to RANDOMDEVICE
+
 	char		radiussecret[64];
 	int		radius_accounting;
 	in_addr_t	radiusserver[MAXRADSERVER];	// radius servers
@@ -431,6 +454,10 @@ typedef struct
 	uint8_t		numradiusservers;		// radius server count
 	short		num_radfds;			// Number of radius filehandles allocated
 
+	char		radius_authtypes_s[32];		// list of valid authentication types (chap, pap) in order of preference
+	int		radius_authtypes;
+	int		radius_authprefer;
+
 	in_addr_t	default_dns1, default_dns2;
 
 	unsigned long	rl_rate;			// default throttle rate
@@ -450,7 +477,8 @@ typedef struct
 	int		next_tbf;			// Next HTB id available to use
 	int		scheduler_fifo;			// If the system has multiple CPUs, use FIFO scheduling policy for this process.
 	int		lock_pages;			// Lock pages into memory.
-	int		icmp_rate;			// Max number of ICMP unreachable per second to send>
+	int		icmp_rate;			// Max number of ICMP unreachable per second to send
+	int		max_packets;			// DoS prevention: per session limit of packets/0.1s
 
 	in_addr_t	cluster_address;		// Multicast address of cluster.
 							// Send to this address to have everyone hear.
@@ -575,6 +603,7 @@ void radiusclear(uint16_t r, sessionidt s);
 clockt backoff(uint8_t try);
 sessionidt sessionbyip(in_addr_t ip);
 sessionidt sessionbyuser(char *username);
+void random_data(uint8_t *buf, int len);
 void sessionshutdown(sessionidt s, char *reason);
 void send_garp(in_addr_t ip);
 void tunnelsend(uint8_t *buf, uint16_t l, tunnelidt t);
@@ -615,7 +644,7 @@ void host_unreachable(in_addr_t destination, uint16_t id, in_addr_t source, char
 
 extern tunnelt *tunnel;
 extern sessiont *session;
-extern sessioncountt *sess_count;
+extern sessionlocalt *sess_local;
 extern ippoolt *ip_address_pool;
 #define sessionfree (session[0].next)