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mgcp协议源代码。支持多种编码：g711

ipgrab 


Mike Borella
[e-mail]

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COPYRIGHT

Copyright (C) 1997-99 Mike Borella

Redistribution and use in source and binary forms are permitted
provided that this paragraph is duplicated in all such forms and in
any documentation, advertising materials, and other materials related
to such distribution and use acknowledge that the software was
developed by Mike Borella.  The name of the Author may not be used to
endorse or promote products derived from this software without
specific prior written permission.

THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.

Some of this code has been taken from tcpdump, which was developed by
the Network Research Group at Lawrence Berkeley National Lab, and is
copyrighted by the University of California Regents.

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DESCRIPTION

This program reads and parses packets from the link layer through the
transport layer, dumping explicit header information along the way.
It is a lot like tcpdump from LBL except that I've made an effort to
dump every relevant header field possible.  The overall structure of
the code is loosely based on tcpdump and I've lifted a few modules
from the tcpdump distribution when necessary, rather than re-inventing
the wheel.  In particular, the address conversion hashing routines are
pretty much lifted verbatim, as well as the TCP options section.

I expect that this code can be used for detailed packet level
debugging of existing or new protocols.  Also, I imagine that it could
be a useful teaching and instruction tool for TCP/IP or security
courses.  I've made an effort to make the code readable, sometimes
even at the expense of efficiency, so that one can use it to learn
about the pcap library calls and the header field data structures.

Would you like to see new features and protocols supported?  Do you
have a proprietary protocol that you'd like to test?  Two ways to make
it happen: (1) write a module yourself - if you send me a copy I'll
merge it into my source and acknowledge you as author, (2) ask me to
write it - send me email for details.

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INSTALLATION

You must have the pcap library (libpcap) version 0.3 or greater
installed.  In particular, the pcap.h and net/bpf.h files must be in
an appropriate include directory (just grabbing a pre-compiled
libpcap.so won't cut it).  Download pcap from
http://www-nrg.ee.lbl.gov.

Run the configure script to create a Makefile, then type 'make'.  If
you need to install any other libraries or headers, configure should
tell you.

It should compile cleanly on Linux 2.0.x and 2.2.x, FreeBSD 3.2, 
and Solaris 2.7.  Unfortunately the Solaris port will crash on 
IPX RIP packets.  I hope to fix this soon.

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OPERATION

See man page for details.

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THANKS

Marty Roesch fixed some of the timestamping, and provided the code for
payload output.  Jorgen Pehrson provided the buffered output option.
Stuart Stock added a lot of fixes to ISAKMP.  Cullen Jennings contributed
the MGCP parser.

Lots of other people suggested things that eventually made their way
into the code, in one form or another.

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PROTOCOLS KNOWN

Fully Supported:
	- IP
	- TCP
	- UDP
	- ARP
	- Ethernet
	- SLIP
	- Raw IP
	- Loopback
	- ESP
	- AH
	- IPX

Partially Supported or Untested:
	- IPX/RIP
	- SPX
	- DNS
	- DHCP
	- L2TP
	- RIP
	- SIP
	- SDP
	- ISAKMP
	- RSIP
	- MGCP

Currently Broken:
	- RTP

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TO DO

- Config file for protocols that use varying ports (RTP, etc.)
- IPv6 and IGMP support.
- SNMP, PPP, NTP, and NetBios support.
- PPTP