Author: tuexen
Date: Mon May 12 09:46:48 2014
New Revision: 265909
URL: http://svnweb.freebsd.org/changeset/base/265909
Log:
Disable TX checksum offload for UDP-Lite completely. It wasn't used for
partial checksum coverage, but even for full checksum coverage it doesn't
work.
This was discussed with Kevin Lo (kevlo@).
Modified:
head/sys/netinet/udp_usrreq.c
Modified: head/sys/netinet/udp_usrreq.c
==============================================================================
--- head/sys/netinet/udp_usrreq.c Mon May 12 09:05:07 2014
(r265908)
+++ head/sys/netinet/udp_usrreq.c Mon May 12 09:46:48 2014
(r265909)
@@ -1370,13 +1370,17 @@ udp_output(struct inpcb *inp, struct mbu
* Set up checksum and output datagram.
*/
ui->ui_sum = 0;
- if (cscov_partial) {
+ if (pr == IPPROTO_UDPLITE) {
if (inp->inp_flags & INP_ONESBCAST)
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 || pr == IPPROTO_UDPLITE) {
- /* for UDP-Lite full checksum coverage is requested */
+ if (cscov_partial) {
+ if ((ui->ui_sum = in_cksum(m, sizeof(struct ip) +
cscov)) == 0)
+ ui->ui_sum = 0xffff;
+ } else {
+ if ((ui->ui_sum = in_cksum(m, sizeof(struct udpiphdr) +
len)) == 0)
+ ui->ui_sum = 0xffff;
+ }
+ } else if (V_udp_cksum) {
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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