Author: tuexen
Date: Fri May 9 14:15:48 2014
New Revision: 265776
URL: http://svnweb.freebsd.org/changeset/base/265776
Log:
Fix a logic bug which prevented the sending of UDP packet with 0 checksum.
This bug was introduced in r264212 and should be X-MFCed with that
revision, if UDP-Lite support if MFCed.
Modified:
head/sys/netinet/udp_usrreq.c
Modified: head/sys/netinet/udp_usrreq.c
==============================================================================
--- head/sys/netinet/udp_usrreq.c Fri May 9 14:02:18 2014
(r265775)
+++ head/sys/netinet/udp_usrreq.c Fri May 9 14:15:48 2014
(r265776)
@@ -1375,7 +1375,8 @@ udp_output(struct inpcb *inp, struct mbu
faddr.s_addr = INADDR_BROADCAST;
if ((ui->ui_sum = in_cksum(m, sizeof(struct ip) + cscov)) == 0)
ui->ui_sum = 0xffff;
- } else if (V_udp_cksum || !cscov_partial) {
+ } else if (V_udp_cksum || pr == IPPROTO_UDPLITE) {
+ /* for UDP-Lite full checksum coverage is requested */
if (inp->inp_flags & INP_ONESBCAST)
faddr.s_addr = INADDR_BROADCAST;
ui->ui_sum = in_pseudo(ui->ui_src.s_addr, faddr.s_addr,
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