add last corrections from diff and fix sctp_rtoinfo for setsockopt with ellipsis as type for all values

of length fields

This fixes https://github.com/nplab/packetdrill/issues/5.

Please note that packetdrill currently does not support
getsockopt() for non int values.

This fixes https://github.com/nplab/packetdrill/issues/19

This fixes https://github.com/nplab/packetdrill/issues/18.

When specifying INIT or INIT-ACK chunks allow the tag and the tsn
field to be omitted (meaning tag=... or tsn=... is allowed).

error causes.
The possibility to specifiy the error causes needs to be implemented.

This patch add support for the PAD chunk and PAD parameter defined
in https://tools.ietf.org/html/rfc4820
This fixes https://github.com/nplab/packetdrill/issues/16

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

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

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

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 UDPLite as specified in RFC 3828
and the corresponding socket options.
It is tested on FreeBSD 10.1 and Linux, the platforms supporting
UDPLite.

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

This commit adds support for the following SCTP socket options:
* SCTP_RTOINFO
* SCTP_INITMSG
* SCTP_NODELAY
* SCTP_MAXSEG
* SCTP_DELAYED_SACK
* SCTP_MAX_BURST

Tested on Linux and FreeBSD. NetBSD and OpenBSD doen't support
SCTP and should not be affected.

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

The --dry_run command line flag causes packetdrill to verify command
line args, load and parse the given script, but not execute it. If any
errors are found during these steps, packetdrill will print an error
as before.  Otherwise, it will exit(0) and produce no output.

Change-Id: Ibf4502c6ea326539346a58b58d7feb29d4b3da69

Code to parse script packets using an encapsulation layer that is an
MPLS label stack.

The syntax looks like:

  mpls (label 123, tc 1, [S], ttl 255) (label 456, tc 1, [S], ttl 255)

This is borrowed from the syntax from tcpdump, which is:

  MPLS (label 123, exp 1, [S], ttl 255) (label 456, exp 1, [S], ttl 255)

We use "tc" because RFC 5462 renamed the EXP ("experimental") field to
the TC ("traffic class") field. We use lower-case "mpls" instead of
"MPLS" for consistency with other packetdrill protocols, and for ease
of typing.

Change-Id: I2e797aead8605da9fe3f0461594cf7273d4ef0ec

packetdrill already supported an inet_addr() as a part of a sockaddr
expression (since that's how strace represents the sockaddr argument
to connect(), for example). But now we also want to allow a
stand-alone inet_addr() call, to allow the specification of IP
addresses for other contexts.

Change-Id: Ia69751030eff399e6b0d9cbb4a15530f0b721278

Add support for IPv6 in encapsulation layers, including: lexical
scanning of IPv6 addresses, parsing IPv6 encap in scripts, appending
and filling in IPv6 encapsulation.


Change-Id: I1349cd4056c168a4114a92324eb2a321f7db7697

The main engine for handling encapsualted packets in packetdrill,
including:

- parsing scripts with encapsulation
- parsing packets with encapsulation
- injecting packets with encapsulation

Encapsulated packets look like the following, which has an IP header,
GRE header, and then regular IP/TCP header:

+0 > ipv4 1.1.1.1 > 2.2.2.2: gre: . 1:1001(1000) ack 1

See other patches in the series for more detailed examples.


Change-Id: Ia8c7580e268f5b0347bd9d3fdc73b096f751a79d

Initial commit for the packetdrill network stack testing tool:

  https://code.google.com/p/packetdrill/



Signed-off-by: Neal Cardwell <ncardwell@google.com>