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Diffstat (limited to 'src/openvpn/mss.c')
-rw-r--r--src/openvpn/mss.c17
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);
}
}