diff options
| -rw-r--r-- | sys/netinet/udp_usrreq.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/sys/netinet/udp_usrreq.c b/sys/netinet/udp_usrreq.c index cf2661c74c71..96dc044cd327 100644 --- a/sys/netinet/udp_usrreq.c +++ b/sys/netinet/udp_usrreq.c @@ -250,24 +250,26 @@ udp_input(struct mbuf *m, int off) * Checksum extended UDP header and data. */ if (uh->uh_sum) { + u_short uh_sum; + if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) { if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) - uh->uh_sum = m->m_pkthdr.csum_data; + uh_sum = m->m_pkthdr.csum_data; else - uh->uh_sum = in_pseudo(ip->ip_src.s_addr, + uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, htonl((u_short)len + m->m_pkthdr.csum_data + IPPROTO_UDP)); - uh->uh_sum ^= 0xffff; + uh_sum ^= 0xffff; } else { char b[9]; bcopy(((struct ipovly *)ip)->ih_x1, b, 9); bzero(((struct ipovly *)ip)->ih_x1, 9); ((struct ipovly *)ip)->ih_len = uh->uh_ulen; - uh->uh_sum = in_cksum(m, len + sizeof (struct ip)); + uh_sum = in_cksum(m, len + sizeof (struct ip)); bcopy(b, ((struct ipovly *)ip)->ih_x1, 9); } - if (uh->uh_sum) { + if (uh_sum) { udpstat.udps_badsum++; m_freem(m); return; |