- Add l2tp_mtu configuration option, used to define MRU, MSS.

[l2tpns.git] / l2tpns.h

diff --git a/l2tpns.h b/l2tpns.h
index 71f8ddc..577de9c 100644 (file)
--- a/l2tpns.h
+++ b/l2tpns.h
@@ -1,5 +1,5 @@
 // L2TPNS Global Stuff
-// $Id: l2tpns.h,v 1.90 2005-09-15 09:34:49 bodea Exp $
+// $Id: l2tpns.h,v 1.91 2005-09-16 05:04:29 bodea Exp $
 
 #ifndef __L2TPNS_H__
 #define __L2TPNS_H__
@@ -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
@@ -293,6 +294,9 @@ typedef struct
        // authentication to use
        int lcp_authtype;
 
+       // our MRU
+       uint16_t ppp_mru;
+
        // DoS prevention
        clockt last_packet_out;
        uint32_t packets_out;
@@ -512,14 +516,15 @@ 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
 
        int             ppp_restart_time;               // timeout for PPP restart
        int             ppp_max_configure;              // max lcp configure requests to send
        int             ppp_max_failure;                // max lcp configure naks to send
-       int             ppp_mru;                        // MRU to advertise
 
        char            radiussecret[64];
        int             radius_accounting;
@@ -704,6 +709,8 @@ 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);
@@ -770,7 +777,6 @@ 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;
 
@@ -790,6 +796,9 @@ 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)