This patch adds support for the SCTP parameters defined in RFC 4960.
While there, make the syntax more consistent and make sure that
the packet printing is in line with the syntax being used.
This fixes https://github.com/nplab/packetdrill/issues/6

If the interface MTU was previously set to a non-default value
and in a later run should be set to the default value, it was
not set correctly. With this patch, the MTU is always set.

Move invariant code out of a loop.

When outbound HEARTBEAT chunks are observed, inject the appropriate
HEARTBEAT-ACK chunk when scripted.
While there, plug a memory leak and rename a variable for consistency.
This fixes https://github.com/nplab/packetdrill/issues/11

This test is used to test the injecting of correct HEARTBEAT-ACK
chunks for outbound HEARTBEAT chunks.

Put in a missing ',' between the flags and error causes when
printing ABORT[] and ERROR[] chunks if both are available.

This disables the IPv6 payload length check for now, similar to the
hack for IPv4. Will add a fix later.

linux/version.h. At least not on Rasbian. So take out the last
change and just try to set TUN_F_UFO and ignore if it worked
or not.
This allows to run packetdrill on a Raspberry Pi running Rasbian.

This fixes https://github.com/nplab/packetdrill/issues/7

are installed.

in SACK chunks.

of duplicate TSNs in SACK chunks.

and SHUTDOWN_COMPLETE chunk flags using T.
This finally fixes https://github.com/nplab/packetdrill/issues/2

DATA[flgs=0x03 len=1016 tsn=0 ...
This fixes https://github.com/nplab/packetdrill/issues/3

flags as atwo digit hex number like DATA[flgs=0x03 tsn=0 ...
This addresses https://github.com/nplab/packetdrill/issues/2

SACK[tsn=2 gaps=[4:4, 6:6] dups=[8]]
This fixes https://github.com/nplab/packetdrill/issues/4

This fixes https://github.com/nplab/packetdrill/issues/1

Current limitations:
* Chunk parameters are not yet supported.
* Error causes are not yet supported.
* Chunks can't be bundled with COOKIE-ECHO chunks.
* Chunk flags are not supported.
* Chunk lengths are not supported.
* Gap reports and duplicate TSNs are not supported for SACK chunks.
* SCTP related ICMP messages are not supported.
This version is only tested in a limited way, only on FreeBSD and
only in local mode.

This commit adds support for parsing SCTP packets and converting them
to strings. Currently only chunks, parameters and error causes specified
in RFC 4960 are supported. Support for other RFCs will be added in the
future.
Tested on FreeBSD (amd64 and arm) and Linux.

Signed-off-by: Michael Tuexen <tuexen@fh-muenster.de>

Add some UDPLite tests.

with the other patches.