Commit 496fb87372 ("rx: avoid nat ping
until connection is attached") introduced functionality to defer turning
on NAT ping for server connections until after reachability had been
established for the client.
Unfortunately, this feature could never work correctly because it
assigned an out-of-range flag value of 256 (0x100) for the u_char flags
field. Instead of calling this out as an error, both gcc and Solaris cc
elide this flag so that it is never set in
rx_SetConnSecondsUntilNatPing(), Furthermore, the test in
rxi_ConnClearAttachWait() will always fail; therefore
rxi_ScheduleNatKeepAliveEvent is never called after attach wait has
ended.
Fortunately, this bug is currently moot - not actually exposed in
OpenAFS. (It was discovered by inspection). This is because there are
currently no rx_connection objects in the tree that have both NAT ping
and checkReach (rx_SetCheckReach) enabled. I also searched git history
and found no time when this bug could ever have been exposed. This does
raise the question of why the original commit was needed; but instead of
reverting the original commit, this commit attempts to fix it.
To prevent problems if NAT ping and checkReach are ever both enabled for
an rx_connection, enlarge the rx_connection flags member so that the
RX_CONN_NAT_PING value is no longer out of range.
Change-Id: Ib667ece632f66fa5c63a76398acb3153fed6f9c3
Reviewed-on: https://gerrit.openafs.org/13041
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
This document gives a basic description of Rx debug packets, the
protocol to exchange debug packets, and the version history.
Change-Id: Ic040d336c1e463f7da145f1a292c20c5d5f215df
Reviewed-on: https://gerrit.openafs.org/12677
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
