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| author | Tom Jones <thj@FreeBSD.org> | 2018-10-05 12:51:30 +0000 |
|---|---|---|
| committer | Tom Jones <thj@FreeBSD.org> | 2018-10-05 12:51:30 +0000 |
| commit | b6e870116f9c9ddc8cb80e35de670011921d0ca5 (patch) | |
| tree | aaf11e1bb193bd9608b92bea4489bb7351b4b6d2 | |
| parent | 19fa5a506624e14b05f5dad50a41a3056f1e9002 (diff) | |
| download | src-b6e870116f9c9ddc8cb80e35de670011921d0ca5.tar.gz src-b6e870116f9c9ddc8cb80e35de670011921d0ca5.zip | |
Convert UDP length to host byte order
When getting the number of bytes to checksum make sure to convert the UDP
length to host byte order when the entire header is not in the first mbuf.
Reviewed by: jtl, tuexen, ae
Approved by: re (gjb), jtl (mentor)
Differential Revision: https://reviews.freebsd.org/D17357
Notes
Notes:
svn path=/head/; revision=339195
| -rw-r--r-- | sys/netinet/ip_output.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sys/netinet/ip_output.c b/sys/netinet/ip_output.c index 9d7b9cbe8661..a08806a686bd 100644 --- a/sys/netinet/ip_output.c +++ b/sys/netinet/ip_output.c @@ -932,10 +932,11 @@ in_delayed_cksum(struct mbuf *m) if (m->m_pkthdr.csum_flags & CSUM_UDP) { /* if udp header is not in the first mbuf copy udplen */ - if (offset + sizeof(struct udphdr) > m->m_len) + if (offset + sizeof(struct udphdr) > m->m_len) { m_copydata(m, offset + offsetof(struct udphdr, uh_ulen), sizeof(cklen), (caddr_t)&cklen); - else { + cklen = ntohs(cklen); + } else { uh = (struct udphdr *)mtodo(m, offset); cklen = ntohs(uh->uh_ulen); } |