Re: RFC 1323 implementation

[Hsiao-keng Jerry Chu <[e-mail]>]

	Vendor: Sun Microsystems, Inc.
	Product: Solaris
	    Version: 2.6
	    Checklist items: 1-14 (except for a couple of minor known bugs
		described below)

	By default the active open side will NOT initiate any window scale/
	timestamp options unless necessary (e.g. app specifying a >= 64k
	receive buffer size). The can be overridden by some system tunables.

------------------------------------------------
	      _  Section 2.2
	  1. |X|   Window Scale Option
	  2. |X|   Only send in SYN/ACK if received in SYN
	  3. |X|   Window Scale size based on receive buffer size

	      _  Section 2.3
	  4. |X|   Shift values > 14 are logged and treated as 14.

=> We treat values > 14 as 14 but don't log an error.

	      _  Section 3.2
	  5. |x|   Timestamps Option
	  6. |x|   Only send in SYN/ACK if received in SYN
	  7. |x|   RTT calculations based on Timestamps

	      _  Section 3.4
	 *8. |x|   Update TS.Recent if:
	             SEG.TSval >= TSrecent and SEG.SEQ <= Last.ACK.sent

	      _  Section 4.x
	  9. |X|   PAWS
	 10. |X|   "invalidate" TS.Recent if idle > 24 days.
 
	      _  Appendix A:
	*11. |X|   TCP Maxseg option: MSS = MTU - fixed IP/TCP header

=> We just discovered a bug, although minor, when some IP option is
=> enabled. The size of the IP option gets subtracted from MSS by mistake.
=> Since we implemented 12/13 correctly, this only unnecessarily reduces
=> the effective usable payload size. The bug will be fixed asap.

	*12. |X|   On output: adjust TCP data length for TCP options
	*13. |X|              adjust TCP data length for IP options

	      _  Appendix C:
	*14. |X|   Disable Karn algorithm w/RTTM

* New/changed items from RFC 1323.