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CVS: cvs.openbsd.org: src

Module name:	src
Changes by:	kjc_(_at_)_cvs_(_dot_)_openbsd_(_dot_)_org	2002/05/16 08:10:51

Modified files:
	sys/netinet    : ip.h ip_ecn.c ip_ecn.h ip_input.c ip_ipip.c 
	                 tcp.h tcp_input.c tcp_output.c tcp_subr.c 
	                 tcp_timer.c tcp_usrreq.c tcp_var.h 
	sys/netinet6   : frag6.c 

Log message:
bring in ECN support from KAME.
it consists of
- ECN support in TCP
- tunnel-egress and fragment reassembly rules in layer-3 not to lose
congestion info at tunnel-egress and fragment reassembly

to enable ECN in TCP, build a kernel with TCP_ECN, and then,
turn it on by "sysctl -w net.inet.tcp.ecn=1".

ok deraadt@

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