syslogd: Fix tests when if_epair is not loaded

Take a cue from vnet.subr and abstract module loading, jail creation and
cleanup.

Note that the way jails are created differs slightly from vnet.subr,

syslogd: Fix tests when if_epair is not loaded

Take a cue from vnet.subr and abstract module loading, jail creation and
cleanup.

Note that the way jails are created differs slightly from vnet.subr, to
maintain the current style of the tests.

Reported by: Jenkins
Reviewed by: markj
Approved by: emaste (mentor)
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D48949

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syslogd: Ensure that forwarded messages are sent from port 514

Prior to commit 4ecbee2760f7, syslogd used its listening socket(s) to
forward messages to remote hosts, when so configured. As a conse

syslogd: Ensure that forwarded messages are sent from port 514

Prior to commit 4ecbee2760f7, syslogd used its listening socket(s) to
forward messages to remote hosts, when so configured. As a consequence,
they are sent from the address+port to which those sockets are bound,
typically 0.0.0.0:514.

When in capability mode, sendto() is not permitted, so we instead
pre-create sockets and connect them to the forwarding addresses, letting
the kernel pick an ephemeral source port. However, this doesn't match
syslogd's previous behaviour, breaking some setups.

So, restore the old behaviour by binding forwarding sockets to the
addresses on which syslogd is listening. Since we cannot use the same
sockets for receiving messages and also for forwarding them, use
SO_REUSEPORT to enable duplicate bindings to port 514, relying on the
existing behaviour that the first socket bound to that port is the one
that actually receives messages.

Add some regression tests to cover this and related functionality of
syslogd's -a option.

Reviewed by: jfree
Reported by: Michael Butler <imb@protected-networks.net>
Fixes: 4ecbee2760f7 ("syslogd: Open forwarding socket descriptors")
Differential Revision: https://reviews.freebsd.org/D48222

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syslogd: Add syslog basic message format tests

RFC 3164 and RFC 5424 syslog message format tests and minor refactor of
existing tests to reuse components in new tests.

Reviewed by: markj
MFC after:

syslogd: Add syslog basic message format tests

RFC 3164 and RFC 5424 syslog message format tests and minor refactor of
existing tests to reuse components in new tests.

Reviewed by: markj
MFC after: 3 weeks
Pull Request: https://github.com/freebsd/freebsd-src/pull/1536

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syslogd: Split up basic test case

The basic case previously tested if messages are correctly logged over
UNIX, INET, and INET6 transport. This single case can be split up into
three separate cases t

syslogd: Split up basic test case

The basic case previously tested if messages are correctly logged over
UNIX, INET, and INET6 transport. This single case can be split up into
three separate cases to decrease code complexity and offer more granular
results.

Both INET and INET6 cases will be skipped if the kernel does not
support the corresponding transport.

Reviewed by: zlei, markj
Differential Revision: https://reviews.freebsd.org/D47650

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syslogd: Add host forwarding test

Test communication between hosts by setting up two syslogd instances,
each binded to their own addresses, and sending a message from one to
the other. The tests pas

syslogd: Add host forwarding test

Test communication between hosts by setting up two syslogd instances,
each binded to their own addresses, and sending a message from one to
the other. The tests passes if the message was delivered and logged
successfully.

This required some tweaking to the syslogd start and stop routines so
they could handle launching multiple syslogd instances with different
runtime files.

Run the tests in jails with an isolated VNET so they don't fail due to
an address bind collision in the host's VNET.

Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D47649

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syslogd: Ignore getaddrinfo() errors if -ss is specified

This can arise if the jail doesn't have networking configured, and if
-ss is specified, syslogd won't listen on port 514 anyway.

Add a regre

syslogd: Ignore getaddrinfo() errors if -ss is specified

This can arise if the jail doesn't have networking configured, and if
-ss is specified, syslogd won't listen on port 514 anyway.

Add a regression test case for this as well.

PR: 238006
MFC after: 1 month

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syslogd: Add some basic regression tests

Reviewed by: markj
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D41403