MFC r264212,r264213,r264248,r265776,r265811,r265909:

- Add support for UDP-Lite protocol (RFC 3828) to IPv4 and IPv6 stacks.
  Tested with vlc and a test suite [1].
  [1] http://www.erg.abdn.ac.uk/~gerrit/udp-lite/files/udplite_linux.tar.gz

  Reviewed by:	jhb, glebius, adrian

- Fix a logic bug which prevented the sending of UDP packet with 0 checksum.

- 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.

1 files changed, 14 insertions, 0 deletions

diff --git a/sys/netinet/in_proto.c b/sys/netinet/in_proto.c
index b7dc82a..3878b3c 100644
--- a/sys/netinet/in_proto.c
+++ b/sys/netinet/in_proto.c
@@ -184,6 +184,20 @@ struct protosw inetsw[] = {
 },
 #endif /* SCTP */
 {
+	.pr_type =		SOCK_DGRAM,
+	.pr_domain =		&inetdomain,
+	.pr_protocol =		IPPROTO_UDPLITE,
+	.pr_flags =		PR_ATOMIC|PR_ADDR,
+	.pr_input =		udp_input,
+	.pr_ctlinput =		udplite_ctlinput,
+	.pr_ctloutput =		udp_ctloutput,
+	.pr_init =		udplite_init,
+#ifdef VIMAGE
+	.pr_destroy =		udplite_destroy,
+#endif
+	.pr_usrreqs =		&udp_usrreqs
+},
+{
 	.pr_type =		SOCK_RAW,
 	.pr_domain =		&inetdomain,
 	.pr_protocol =		IPPROTO_RAW,