syslogd: Add host forwarding test

[jfree]

Summary

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.

[markj]

usr.sbin/syslogd/tests/syslogd_test.sh

75–76

IMO it'd be a bit cleaner to just handle this with getopts.

328

Do these addresses get assigned to an interface anywhere?

336

-a isn't handled by syslogd_start, does it get passed to syslogd somehow?

[jfree]

• Fix argument parsing in syslogd_start()
• Assign address to interface for host_action test

[markj]

usr.sbin/syslogd/tests/Makefile

7

I suspect that this is too aggressive. When running tests in parallel there can be a lot of load, resulting in some (hopefully not too large) delays. Probably something like 15-30s would be better.

usr.sbin/syslogd/tests/syslogd_test.sh

332

I suspect you could just assign ${addr} to lo0?

[jfree]

usr.sbin/syslogd/tests/syslogd_test.sh

332

I suspect you could just assign ${addr} to lo0?

If I assign ${addr} to lo0, it gets overridden by the lo0 localhost configuration in syslogd_start(). I couldn't find any options to add multiple addresses to a single loopback interface. Perhaps I am just not seeing the option?

[jfree]

usr.sbin/syslogd/tests/syslogd_test.sh

332

Ah, it was right in front of me! ifconfig lo0 alias. I'll give that a try.

[markj]

usr.sbin/syslogd/tests/syslogd_test.sh

332

Ah, you need to specify the alias keyword when adding a second ip address if you don't want to clear an existing address. I suspect that running ifconfig lo0 inet alias 127.0.0.1/16 in syslogd_start() would fix the problem, but having an extra loopback interface is fine too.