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MFp4 bz_ipv6_fast:

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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
This commit is contained in:
Bjoern A. Zeeb 2012-05-25 01:13:39 +00:00
parent 8632fa3e92
commit 3a9391defb
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=235950
1 changed files with 4 additions and 2 deletions
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6
sys/netinet/tcp_input.c
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@ -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)