X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/59706a53940c8d2a17f36f30d4d54b6042dfe229..4944040cdb14713ea8ae3522299137393e5dc2c9:/l2tpns.h

diff --git a/l2tpns.h b/l2tpns.h
index 2f63803..1412cbd 100644
--- a/l2tpns.h
+++ b/l2tpns.h
@@ -1,5 +1,5 @@
 // L2TPNS Global Stuff
-// $Id: l2tpns.h,v 1.89 2005/09/13 14:23:07 bodea Exp $
+// $Id: l2tpns.h,v 1.98 2005/11/14 08:38:02 bodea Exp $
 
 #ifndef __L2TPNS_H__
 #define __L2TPNS_H__
@@ -15,7 +15,7 @@
 #include <sys/types.h>
 #include <libcli.h>
 
-#define VERSION	"2.1.6"
+#define VERSION	"2.1.11"
 
 // Limits
 #define MAXTUNNEL	500		// could be up to 65535
@@ -31,8 +31,10 @@
 #define T_FREE		(0)		// A tunnel ID that won't ever be used. Mark session as free.
 
 #define	MAXCONTROL	1000		// max length control message we ever send...
-#define MAXMRU		1500		// max MRU as defined by RFC1661
-#define	MAXETHER	(MAXMRU+18)	// max packet we try sending to tun
+#define MINMTU		576		// minimum recommended MTU (rfc1063)
+#define PPPMTU		1500		// default PPP MTU
+#define MAXMTU		2600		// arbitrary maximum MTU
+#define	MAXETHER	(MAXMTU+18)	// max packet we try sending to tun
 #define	MAXTEL		96		// telephone number
 #define MAXUSER		128		// username
 #define MAXPASS		128		// password
@@ -45,7 +47,6 @@
 #define ECHO_TIMEOUT	60		// Time between last packet sent and LCP ECHO generation
 #define IDLE_TIMEOUT	240		// Time between last packet sent and LCP ECHO generation
 #define BUSY_WAIT_TIME	3000		// 5 minutes in 1/10th seconds to wait for radius to cleanup on shutdown
-#define DEFAULT_MRU	1452		// maximum packet size to avoid fragmentation when LNS ethernet MTU is 1500
 
 // Constants
 #ifndef ETCDIR
@@ -147,7 +148,14 @@ enum {
 
 // reset state machine counters
 #define initialise_restart_count(_s, _fsm)			\
-	sess_local[_s]._fsm.conf_sent = sess_local[_s]._fsm.nak_sent
+	sess_local[_s]._fsm.conf_sent = sess_local[_s]._fsm.nak_sent = 0
+
+// increment ConfReq counter and reset timer
+#define restart_timer(_s, _fsm) ({				\
+	sess_local[_s]._fsm.conf_sent++;			\
+	sess_local[_s]._fsm.restart =				\
+		time_now + config->ppp_restart_time;		\
+})
 
 // stop timer on change to state where timer does not run
 #define change_state(_s, _fsm, _new) ({				\
@@ -220,7 +228,7 @@ typedef struct
 	sessionidt next;		// next session in linked list
 	sessionidt far;			// far end session ID
 	tunnelidt tunnel;		// near end tunnel ID
-	uint8_t l2tp_flags;		// various bit flags from the ICCN on the l2tp tunnel.
+	uint8_t flags;			// session flags: see SESSION_*
 	struct {
 		uint8_t phase;		// PPP phase
 		uint8_t lcp:4;		//   LCP    state
@@ -293,6 +301,9 @@ typedef struct
 	// authentication to use
 	int lcp_authtype;
 
+	// our MRU
+	uint16_t ppp_mru;
+
 	// DoS prevention
 	clockt last_packet_out;
 	uint32_t packets_out;
@@ -303,10 +314,15 @@ typedef struct
 
 	// interim RADIUS
 	time_t last_interim;
+
+	// last LCP Echo
+	time_t last_echo;
 } sessionlocalt;
 
-#define	SESSIONPFC	1	// PFC negotiated flags
-#define	SESSIONACFC	2	// ACFC negotiated flags
+// session flags
+#define	SESSION_PFC	(1 << 0)	// use Protocol-Field-Compression
+#define	SESSION_ACFC	(1 << 1)	// use Address-and-Control-Field-Compression
+#define SESSION_STARTED	(1 << 2)	// RADIUS Start record sent
 
 // 168 bytes per tunnel
 typedef struct
@@ -319,7 +335,7 @@ typedef struct
 	uint16_t ns;		// next send
 	int state;		// current state (tunnelstate enum)
 	clockt last;		// when last control message sent (used for resend timeout)
-	clockt retry;		// when to try resenting pending control
+	clockt retry;		// when to try resending pending control
 	clockt die;		// being closed, when to finally free
 	clockt lastrec;		// when the last control message was received
 	char hostname[128];	// tunnel hostname
@@ -512,7 +528,9 @@ typedef struct
 
 	char		tundevice[10];			// tun device name
 	char		log_filename[128];
-	char		l2tpsecret[64];
+
+	char		l2tp_secret[64];		// L2TP shared secret
+	int		l2tp_mtu;			// MTU of interface used for L2TP
 
 	char		random_device[256];		// random device path, defaults to RANDOMDEVICE
 
@@ -703,6 +721,8 @@ void sessionshutdown(sessionidt s, char *reason, int result, int error);
 void filter_session(sessionidt s, int filter_in, int filter_out);
 void send_garp(in_addr_t ip);
 void tunnelsend(uint8_t *buf, uint16_t l, tunnelidt t);
+int tun_write(uint8_t *data, int size);
+void adjust_tcp_mss(sessionidt s, tunnelidt t, uint8_t *buf, int len, uint8_t *tcp);
 void sendipcp(sessionidt s, tunnelidt t);
 void sendipv6cp(sessionidt s, tunnelidt t);
 void processudp(uint8_t *buf, int len, struct sockaddr_in *addr);
@@ -769,7 +789,6 @@ extern char main_quit;
 extern uint32_t last_id;
 extern struct Tstats *_statistics;
 extern in_addr_t my_address;
-extern int tun_write(uint8_t *data, int size);
 extern int clifd;
 extern int epollfd;
 
@@ -789,6 +808,9 @@ struct event_data {
 
 #define TIME (config->current_time)
 
+extern uint16_t MRU;
+extern uint16_t MSS;
+
 // macros for handling help in cli commands
 #define CLI_HELP_REQUESTED	(argc > 0 && argv[argc-1][strlen(argv[argc-1])-1] == '?')
 #define CLI_HELP_NO_ARGS	(argc > 1 || argv[0][1]) ? CLI_OK : cli_arg_help(cli, 1, NULL)