src-test2/sys/netinet/tcp_timer.c, branch release/2.2.5_cvs

This commit was manufactured by cvs2svn to create tag

1997-10-21T01:56:05Z

'RELENG_2_2_5_RELEASE'. This commit was manufactured to restore the state of the 2.2.5-RELEASE image. Releases prior to 5.3-RELEASE are omitting the secure/ and crypto/ subdirs.

MFC: make TCPDEBUG a new-style option

1997-09-16T18:37:02Z

Make the misnamed tcp initial keepalive timer value (which is really the

1996-09-13T23:51:44Z

time, in seconds, that state for non-established TCP sessions stays about) a sysctl modifyable variable. [part 1 of two commits, I just realized I can't play with the indices as I was typing this commit message.]

Fixed two bugs in previous commit: be sure to include tcp_debug.h when

1996-07-12T17:28:47Z

TCPDEBUG is defined, and fix typo in TCPDEBUG2() macro.

Modify the kernel to use the new pr_usrreqs interface rather than the old

1996-07-11T16:32:50Z

pr_usrreq mechanism which was poorly designed and error-prone. This commit renames pr_usrreq to pr_ousrreq so that old code which depended on it would break in an obvious manner. This commit also implements the new interface for TCP, although the old function is left as an example (#ifdef'ed out). This commit ALSO fixes a longstanding bug in the TCP timer processing (introduced by davidg on 1995/04/12) which caused timer processing on a TCB to always stop after a single timer had expired (because it misinterpreted the return value from tcp_usrreq() to indicate that the TCB had been deleted). Finally, some code related to polling has been deleted from if.c because it is not relevant t -current and doesn't look at all like my current code.

Fix a bug in the handling of the "persist" state which, under certain

1996-06-03T15:37:52Z

circumstances, caused perfectly good connections to be dropped. This happened for connections over a LAN, where the retransmit timer calculation TCP_REXMTVAL(tp) returned 0. If sending was blocked by flow control for long enough, the old code dropped the connection, even though timely replies were being received for all window probes. Reviewed by: W. Richard Stevens

Two fixes from Rich Stevens:

1996-04-15T03:46:33Z

1) Set the persist timer to help time-out connections in the CLOSING state. 2) Honor the keep-alive timer in the CLOSING state. This fixes problems with connections getting "stuck" due to incompletion of the final connection shutdown which can be a BIG problem on busy WWW servers.

Add a sysctl (net.inet.tcp.always_keepalive: 0) that when set will force

1996-04-04T11:17:04Z

keepalive on all tcp sessions. Setsockopt(2) cannot override this setting. Maybe another one is needed that just changes the default for SO_KEEPALIVE ? Requested by: Joe Greco

Move or add #include in preparation for upcoming struct socket

1996-03-11T15:13:58Z

changes.

Reverse the modification which caused the annoying m_copydata crash: set

1996-01-04T21:34:21Z

the TF_ACKNOW flag when the REXMT timer goes off to force a retransmission. In certain situations pulling snd_nxt back to snd_una is not sufficient.