diff options
| -rw-r--r-- | src/openvpn/mss.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/src/openvpn/mss.c b/src/openvpn/mss.c index 64fd722..7298c7b 100644 --- a/src/openvpn/mss.c +++ b/src/openvpn/mss.c @@ -129,7 +129,7 @@ mss_fixup_dowork (struct buffer *buf, uint16_t maxmss) { int hlen, olen, optlen; uint8_t *opt; - uint16_t *mss; + uint16_t mssval; int accumulate; struct openvpn_tcphdr *tc; @@ -159,14 +159,13 @@ mss_fixup_dowork (struct buffer *buf, uint16_t maxmss) if (*opt == OPENVPN_TCPOPT_MAXSEG) { if (optlen != OPENVPN_TCPOLEN_MAXSEG) continue; - mss = (uint16_t *)(opt + 2); - if (ntohs (*mss) > maxmss) { - dmsg (D_MSS, "MSS: %d -> %d", - (int) ntohs (*mss), - (int) maxmss); - accumulate = *mss; - *mss = htons (maxmss); - accumulate -= *mss; + mssval = (opt[2]<<8)+opt[3]; + if (mssval > maxmss) { + dmsg (D_MSS, "MSS: %d -> %d", (int) mssval, (int) maxmss); + accumulate = htons(mssval); + opt[2] = (maxmss>>8)&0xff; + opt[3] = maxmss&0xff; + accumulate -= htons(maxmss); ADJUST_CHECKSUM (accumulate, tc->check); } } |