*** empty log message ***

diff --git a/l2tpns.c b/l2tpns.c
index 193e333..c5d8cc9 100644 (file)
--- a/l2tpns.c
+++ b/l2tpns.c
@@ -4,7 +4,7 @@
 // Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced
 // vim: sw=8 ts=8
 
-char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.134 2005-09-16 05:30:30 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.135 2005-09-16 05:35:31 bodea Exp $";
 
 #include <arpa/inet.h>
 #include <assert.h>
@@ -988,6 +988,7 @@ void adjust_tcp_mss(sessionidt s, tunnelidt t, uint8_t *buf, int len, uint8_t *t
 {
        int d = (tcp[12] >> 4) * 4;
        uint8_t *mss = 0;
+       uint8_t *opts;
        uint8_t *data;
 
        if ((tcp[13] & 0x3f) & ~(TCP_FLAG_SYN|TCP_FLAG_ACK)) // only want SYN and SYN,ACK
@@ -996,23 +997,23 @@ void adjust_tcp_mss(sessionidt s, tunnelidt t, uint8_t *buf, int len, uint8_t *t
        if (tcp + d > buf + len) // short?
                return;
 
+       opts = tcp + 20;
        data = tcp + d;
-       tcp += 20;
 
-       while (tcp < data)
+       while (opts < data)
        {
-               if (*tcp == 2 && tcp[1] == 4) // mss option (2), length 4
+               if (*opts == 2 && opts[1] == 4) // mss option (2), length 4
                {
-                       mss = tcp + 2;
+                       mss = opts + 2;
                        if (mss + 2 > data) return; // short?
                        break;
                }
 
-               if (*tcp == 0) return; // end of options
-               if (*tcp == 1 || !tcp[1]) // no op (one byte), or no length (prevent loop)
-                       tcp++;
+               if (*opts == 0) return; // end of options
+               if (*opts == 1 || !opts[1]) // no op (one byte), or no length (prevent loop)
+                       opts++;
                else
-                       tcp += tcp[1]; // skip over option
+                       opts += opts[1]; // skip over option
        }
 
        if (!mss) return; // not found