Author: bz
Date: Fri May 25 01:13:39 2012
New Revision: 235950
URL: http://svn.freebsd.org/changeset/base/235950
Log:
MFp4 bz_ipv6_fast:
Factor out the tcp_hc_getmtu() call. As the comments say it
applies to both v4 and v6, so only write it once making it easier
to read the protocol family specifc code.
Sponsored by: The FreeBSD Foundation
Sponsored by: iXsystems
Reviewed by: gnn (as part of the whole)
MFC After: 3 days
Modified:
head/sys/netinet/tcp_input.c
Modified: head/sys/netinet/tcp_input.c
==============================================================================
--- head/sys/netinet/tcp_input.c Fri May 25 00:38:06 2012
(r235949)
+++ head/sys/netinet/tcp_input.c Fri May 25 01:13:39 2012
(r235950)
@@ -3542,7 +3542,6 @@ tcp_mssopt(struct in_conninfo *inc)
if (inc->inc_flags & INC_ISIPV6) {
mss = V_tcp_v6mssdflt;
maxmtu = tcp_maxmtu6(inc, NULL);
- thcmtu = tcp_hc_getmtu(inc); /* IPv4 and IPv6 */
min_protoh = sizeof(struct ip6_hdr) + sizeof(struct tcphdr);
}
#endif
@@ -3553,10 +3552,13 @@ tcp_mssopt(struct in_conninfo *inc)
{
mss = V_tcp_mssdflt;
maxmtu = tcp_maxmtu(inc, NULL);
- thcmtu = tcp_hc_getmtu(inc); /* IPv4 and IPv6 */
min_protoh = sizeof(struct tcpiphdr);
}
#endif
+#if defined(INET6) || defined(INET)
+ thcmtu = tcp_hc_getmtu(inc); /* IPv4 and IPv6 */
+#endif
+
if (maxmtu && thcmtu)
mss = min(maxmtu, thcmtu) - min_protoh;
else if (maxmtu || thcmtu)
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