[Serusers] parse_msg() SIP parser test program

[Hendrik Scholz]

Hi!

Every once in a while I came across certain messages that apparently 
could not be parsed properly. To track down these I've written a small
helper program.
Put this into the tests/ subdirectory and follow the compilation 
instructions!

Until now I only found STUN messages that used port 5060 so I might
need to increase debugging inside the SER code.

Here's the README:

This program feeds SIP messages into the SER SIP parser to analyze its
behaviour. Valid data sources are live traffic obtained via pcap,
previously recorded traffic contained in pcap capture files or a plain
containing a single SIP message.

Usage:

Depending on the command line parameters parser_test switches between
the aforementioned modes.

  - monitoring live traffic:
    # parser_test -i <interface> -s <pcap dest>

  - analyzing pcap file:
    $ parser_test -r <pcap source> -s <pcap dest>

  - file mode
    $ parser_test -f <buffer>

-s <pcap dest> needs to be set in pcap based modes. This newly generated
pcap file contains all messages that could not be parsed properly by
parse_msg().

Don't forget to set LD_LIBRARY_PATH to include ../lib/cds when running
parser_test, i.e.
  $ LD_LIBRARY_PATH=../lib/cds ./parser_test -f testfile

Compilation:

$ gcc -c parser_test.c -o parser_test.o -Wall -g
$ gcc -o parser_test parser_test.o -lcds -L../lib/cds -lpcap ../dprint.o \
   ../mem/mem.o ../mem/shm_mem.o ../mem/q_malloc.o ../error.o \
   ../data_lump*o  ../parser/contact/parse_contact.o \
   ../parser/contact/contact.o  ../parser/digest/*.o ../parser/*.o -g

Caveats:

   - Fragements are not de-fragmented. This could be done using libnids
   - verbose debug messages

The sources as well as the README are available from:
http://dump.wormulon.net/parser_test/


-- 
Hendrik Scholz - <hscholz at raisdorf.net> - http://www.wormulon.net/