Author: tuexen
Date: Thu Sep 10 13:15:17 2020
New Revision: 365570
URL: https://svnweb.freebsd.org/changeset/base/365570
Log:
MFC r358621:
When using automatically generated flow labels and using TCP SYN
cookies, use the same flow label for the segments sent during the
handshake and after the handshake.
This fixes a bug by making sure that sc_flowlabel is always stored in
network byte order.
Modified:
stable/12/sys/netinet/tcp_syncache.c
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/sys/netinet/tcp_syncache.c
==============================================================================
--- stable/12/sys/netinet/tcp_syncache.c Thu Sep 10 12:54:46 2020
(r365569)
+++ stable/12/sys/netinet/tcp_syncache.c Thu Sep 10 13:15:17 2020
(r365570)
@@ -2161,7 +2161,8 @@ syncookie_lookup(struct in_conninfo *inc, struct synca
#ifdef INET6
case INC_ISIPV6:
if (sotoinpcb(lso)->inp_flags & IN6P_AUTOFLOWLABEL)
- sc->sc_flowlabel = sc->sc_iss & IPV6_FLOWLABEL_MASK;
+ sc->sc_flowlabel =
+ htonl(sc->sc_iss) & IPV6_FLOWLABEL_MASK;
break;
#endif
}
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