Add README.tcpmd5 to describe how to build a simple test setup
and run tests.
Convert compile time options to run time options [1].
Discussed with: rwatson
Suggested by: rwatson [1]
and protocol-independent host mode multicast. The code is written to
accomodate IPv6, IGMPv3 and MLDv2 with only a little additional work.
This change only pertains to FreeBSD's use as a multicast end-station and
does not concern multicast routing; for an IGMPv3/MLDv2 router
implementation, consider the XORP project.
The work is based on Wilbert de Graaf's IGMPv3 code drop for FreeBSD 4.6,
which is available at: http://www.kloosterhof.com/wilbert/igmpv3.html
Summary
* IPv4 multicast socket processing is now moved out of ip_output.c
into a new module, in_mcast.c.
* The in_mcast.c module implements the IPv4 legacy any-source API in
terms of the protocol-independent source-specific API.
* Source filters are lazy allocated as the common case does not use them.
They are part of per inpcb state and are covered by the inpcb lock.
* struct ip_mreqn is now supported to allow applications to specify
multicast joins by interface index in the legacy IPv4 any-source API.
* In UDP, an incoming multicast datagram only requires that the source
port matches the 4-tuple if the socket was already bound by source port.
An unbound socket SHOULD be able to receive multicasts sent from an
ephemeral source port.
* The UDP socket multicast filter mode defaults to exclusive, that is,
sources present in the per-socket list will be blocked from delivery.
* The RFC 3678 userland functions have been added to libc: setsourcefilter,
getsourcefilter, setipv4sourcefilter, getipv4sourcefilter.
* Definitions for IGMPv3 are merged but not yet used.
* struct sockaddr_storage is now referenced from <netinet/in.h>. It
is therefore defined there if not already declared in the same way
as for the C99 types.
* The RFC 1724 hack (specify 0.0.0.0/8 addresses to IP_MULTICAST_IF
which are then interpreted as interface indexes) is now deprecated.
* A patch for the Rhyolite.com routed in the FreeBSD base system
is available in the -net archives. This only affects individuals
running RIPv1 or RIPv2 via point-to-point and/or unnumbered interfaces.
* Make IPv6 detach path similar to IPv4's in code flow; functionally same.
* Bump __FreeBSD_version to 700048; see UPDATING.
This work was financially supported by another FreeBSD committer.
Obtained from: p4://bms_netdev
Submitted by: Wilbert de Graaf (original work)
Reviewed by: rwatson (locking), silence from fenner,
net@ (but with encouragement)
[Since the change to strict refcounting for in_multi objects, this test
began to fail; formerly the refcount was a count of the number of requests
for a given address, NOT a count of pointers to the object.]
the first part before starting, or the TCP port we want to bind may be in
use still. Sleep for a short period between tests.
Use SIGTERM instead of SIGKILL.
multicast group using a raw socket, then removing the interface on which
the group is found, and joining a multicast group using a udp socket,
then removing the interface on which the group is found. An if_disc
interface is used as the interface on which to attach.
NB: A panic currently results from running this regression test, so do
so with caution.
PR: 77665
Reported by: Gavin Atkinson <gavin dot atkinson at ury dot york dot ac dot uk>
Reported by: Brooks Davis <brooks at FreeBSD dot org>
- Test that the basic socket options have the right defaults, that we can
change them, read them back, etc.
- Add and remove some multicast addresses.
- Send a loopback multicast address and make sure it arrives intact.
There's more that could be done here, but it's a start.
MFC after: 3 days
other until the window is closed. Then one of the sockets is closed, which
will generate a RST once the TCP at the other socket does a window probe.
All versions of FreeBSD prior to 11/26/2004 will ignore this RST into a 0
window, causing the connection (and application) to hang indefinitely.
On patched versions of FreeBSD (and other operating systems), the RST
will be accepted and the program will exit in a few seconds.
Submitted by: Michiel Boland
Reviewed by: silby
understood by Perl's Test::Harness module and prove(1) commands.
Update README to describe the new protocol. The work's broken down into
two main sets of changes.
First, update the existing test programs (shell scripts and C programs)
to produce output in the ok/not ok format, and to, where possible, also
produce a header describing the number of tests that are expected to be
run.
Second, provide the .t files that actually run the tests. In some cases
these are copies of, or very similar too, scripts that already existed.
I've kept the old scripts around so that it's possible to verify that
behaviour under this new system (in terms of whether or not a test fails)
is identical to the behaviour under the old system.
Add a TODO file.
- Consistently use err/errx/warnx throughout, rather than using perror()
and exit().
- Teach the tests how to better manage (and therefore test) privilege:
in particular, how to create sockes with root credentials but exercise
the privileges with non-root credentials, etc.
- Teach the test suite to apply each of the non-IP_HDRINCL options across
each of SOCK_DGRAM, SOCK_STREAM, and SOCK_RAW.
atempts to read and write various IP-level socket options as root and
nobody, making sure the initial values are as expected, that they can
be changed to valid values and take effect, etc. No attempt is made
to check for the correct implementation of side effects (such as
changes in packet headers) as yet.
The IP options section is currently broken but will be fixed shortly.
Not all multicast options are currently tested.
