Share rump_server start/stop and interface creation/destruction functions

The common functions store socks of rump_servers, interfaces of rump_servers
and buses that intefaces connect and allow to destroy them with common
functions without specifying which socks, interfaces and buses we should
destroy.

This change reduces lots of similar setup/cleanup codes.

branches: 1.2.2;
Run mcast tests on rump kernels

The tests on anita qemus failed due to that the host network environment
didn't meet the tests.

The change makes the tests independent from host environments
and the tests will pass on any environments including anita qemus.

Discussed on tech-kern and tech-net.

add a multicast test (what to do with v6?)

Add tests that destroy an interface while the mcast program is running

branches: 1.3.2; 1.3.4;
Make the test stable under load or when running on a slow machine

Let sender and receiver synchronize explicitly via a socketpair
and don't rely on sleep.

Detail an error message

Run mcast tests on rump kernels

The tests on anita qemus failed due to that the host network environment
didn't meet the tests.

The change makes the tests independent from host environments
and the tests will pass on any environments including anita qemus.

Discussed on tech-kern and tech-net.

Run mcast tests on rump kernels

The tests on anita qemus failed due to that the host network environment
didn't meet the tests.

The change makes the tests independent from host environments
and the tests will pass on any environments including anita qemus.

Discussed on tech-kern and tech-net.

Fix specifying an interface for IPV6_JOIN_GROUP

Using always an interface of index=1 is not good idea; it varies
depending on runtime environments. We can use index=0 instead,
which allows the kernel to pick an appropriate interface for mcast.

Handle child's exit status precisely

Use EXIT_FAILURE instead of 1

KNF

Tweaks of whitespaces and tabs.

Save errno for errx

Bump timeout for a poll() call slightly, so the test has a chance to work
on slow machines.

fix typo, use different address

- deal with MacOS/X not having clock_*()
- change multicast address
- set the interface
XXX: Now the ipv6 code works on MacOS/X but does not work for us still.

timespec.tv_nsec is long, so use %ld instead of %jd as printf format.

typo

Oops need to bind, also make the message more interesting and check that
it arrives correctly.

Explain what works, what does not and why.
Provide compatible code so that it compiles on Linux and MacOS/X with -DTEST.
We should check more OS's and see if they are broken too.

now we support the v6 ioctls for mapped addresses too.

Explain a bit more what's going on with the multicast setsockopts.

Add the simple unconnected tests too.

add a multicast test (what to do with v6?)

Clean up clunky eval strings

- Remove unnecessary \ at EOL
- This allows to omit ; too
- Remove unnecessary quotes for arguments of atf_set
- Don't expand $DEBUG in eval
- We expect it's expanded on execution

Suggested by kre@

branches: 1.5.4;
Add tests that destroy an interface while the mcast program is running

branches: 1.4.2;
Share rump_server start/stop and interface creation/destruction functions

The common functions store socks of rump_servers, interfaces of rump_servers
and buses that intefaces connect and allow to destroy them with common
functions without specifying which socks, interfaces and buses we should
destroy.

This change reduces lots of similar setup/cleanup codes.

Accept DEBUG environment variable

By doing so, we can easily turn DEBUG on/off without modifying
the ATF scripts.

+ -lrumpdev

branches: 1.1.2;
Run mcast tests on rump kernels

The tests on anita qemus failed due to that the host network environment
didn't meet the tests.

The change makes the tests independent from host environments
and the tests will pass on any environments including anita qemus.

Discussed on tech-kern and tech-net.