diff options
| -rw-r--r-- | sys/netpfil/ipfilter/netinet/ip_nat.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/sys/netpfil/ipfilter/netinet/ip_nat.c b/sys/netpfil/ipfilter/netinet/ip_nat.c index b7f5eb94b1dd..c8125c10e3f0 100644 --- a/sys/netpfil/ipfilter/netinet/ip_nat.c +++ b/sys/netpfil/ipfilter/netinet/ip_nat.c @@ -5154,9 +5154,12 @@ ipf_nat_out(fr_info_t *fin, nat_t *nat, int natadd, u_32_t nflags) s2 += ntohs(ip->ip_len); CALC_SUMD(s1, s2, sumd); - uh = (udphdr_t *)(ip + 1); - uh->uh_ulen += fin->fin_plen; - uh->uh_ulen = htons(uh->uh_ulen); + if (ip->ip_p == IPPROTO_UDP) { + uh = (udphdr_t *)(ip + 1); + uh->uh_ulen = ntohs(uh->uh_ulen); + uh->uh_ulen += fin->fin_plen; + uh->uh_ulen = htons(uh->uh_ulen); + } #if !defined(_KERNEL) || SOLARIS || \ defined(BRIDGE_IPF) || defined(__FreeBSD__) ipf_fix_outcksum(0, &ip->ip_sum, sumd, 0); |