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
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=339195
@ -932,10 +932,11 @@ in_delayed_cksum(struct mbuf *m)
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if (m->m_pkthdr.csum_flags & CSUM_UDP) {
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/* if udp header is not in the first mbuf copy udplen */
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if (offset + sizeof(struct udphdr) > m->m_len)
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if (offset + sizeof(struct udphdr) > m->m_len) {
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m_copydata(m, offset + offsetof(struct udphdr,
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uh_ulen), sizeof(cklen), (caddr_t)&cklen);
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else {
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cklen = ntohs(cklen);
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} else {
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uh = (struct udphdr *)mtodo(m, offset);
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cklen = ntohs(uh->uh_ulen);
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}
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