From: Brendan O'Dea Date: Fri, 16 Sep 2005 05:35:31 +0000 (+0000) Subject: *** empty log message *** X-Git-Tag: 2.2.1-2fdn3.1~19^2^2~1^2~104 X-Git-Url: http://git.sameswireless.fr/l2tpns.git/commitdiff_plain/739356c34cd1146a6d61093668aa5a40549c83a0?hp=46f70a1e3a882b1287f4c24e119796c6987e1f95 *** empty log message *** --- diff --git a/l2tpns.c b/l2tpns.c index 193e333..c5d8cc9 100644 --- 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 #include @@ -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