MTP

Section: MTP Interface (MTPI) (7)
Updated: 2008-10-31
Index Return to Main Contents

NAME

mtp - SS7 Message Transfer Part (MTP) sockets

SYNOPSIS

#include <sys/socket.h>
#include <netss7/ss7.h>
#include <netss7/mtp.h>

int mtp_socket = socket(PF_SS7, SOCK_RDM, SS7PROTO_MTP);

DESCRIPTION

MTP
is an implementation of the MTP (Message Transfer Part) defined in ITU-T Recommendation Q.704. MTP provides reliable delivery of ordered or unordered packets over a full duplex connection between two SOCK_RDM sockets on top of ss7(7). MTP can provide strong assurances that the data arrives in order on a stream, if requested, and retransmits lost packets. It generates and checks a per packet checksum to catch transmission errors.

MTP provides the following socket types:

SOCK_RDM: A connectionless socket that preserves message boundaries and provides ordered or unordered reliable delivery on multiple streams.
SOCK_SEQPACKET: A connection oriented socket that preserves message boundaries.

Connection Establishment

Sending Data

Receiving Data

Connection Release

ADDRESS FORMATS

SOCKET CALLS

FEATURES

SOCKET OPTIONS

The following SOL_SS7 socket options are supported by MTP:

SS7_PVAR
SS7_MPLEV
SS7_DEBUG
SS7_PCR
SS7_HSL
SS7_XSN
SS7_CLUSTER

The following SOL_MTP socket options are supported by MTP:

MTP_ADDR: Pass an ancillary message that contains the sockaddr_mtp structure that supplies the source address of the message to send or the destination address of the received message. When used with setsockopt(3) and getsockopt(3), the argument is a flag that tells the socket whether the MTP_ADDR message should be passed or not. The message itself can only be sent or retrieved as a control message with a packet using recvmsg(3) or sendmsg(3). If MTP_ADDR is passed to sendmsg(3), then the outgoing packet will be send with the source address provided.
MTP_MP
MTP_SLS
MTP_RECVADDR
MTP_RECVMP
MTP_RECVSLS
MTP_DEBUG

IOCTLS

See mtpi_ioctl(4).

REFERENCES

[1]: XNS, Open Group CAE Specification: Technical Standard: Network Services (XNS), Issue 5.2, Draft 2, 1999, (Berkshire, UK), OpenGroup, Open Group Publication. [ISBN 1-85912-241-8] <http://www.opengroup.org/onlinepubs/>
[2]: ITU-T Recommendation Q.700, Introduction to CCITT Signalling System No. 7, March 1993, (Geneva), ITU, ITU-T Telecommunication Standardization Sector of ITU. (Previously "CCITT Recommendation") <http://www.itu.int/rec/T-REC-Q.700/>
[3]: ITU-T Recommendation Q.701, Functional Description of the Message Transfer Part (MTP) of Signalling System No. 7, March 1993, (Geneva), ITU, ITU-T Telecommunication Standardization Sector of ITU. (Previously "CCITT Recommendation") <http://www.itu.int/rec/T-REC-Q.701/>
[4]: ITU-T Recommendation Q.704, Message Transfer Part --- Signalling Network Functions and Messages, March 1993, (Geneva), ITU, ITU-T Telecommunication Standardization Sector of ITU. (Previously "CCITT Recommendation") <http://www.itu.int/rec/T-REC-Q.704/>
[5]: ANSI T1.111, Signalling System No. 7 --- Message Transfer Part, 1992, ANSI, American National Standards Institute.
[6]: ETSI EN 300 008-1 V1.3.1, Integrated Services Digital Network (ISDN); Signalling System No. 7; Protocol Specification, September 2000, (Sophia Antipolis, Valbonne), ETSI, European Telecommunications Standards Institute. [REN/SPAN-01074-1] (ITU-T Recommendations Q.701, Q.702, Q.703, Q.704, Q.705, Q.706, Q.707 and Q.708, modified) <http://www.etsi.org/>
[7]: TTC Standard JT-Q)704, Message Transfer Part --- Signalling Network Functions and Messages, April 28, 1992, (Japan), TTC, Telecommunication Technology Committee (TTC).
[8]: MTPI, Message Transfer Provider Interface (MTPI) Specification, Revision 0.9.2, Draft 1, July 15, 2007, (Edmonton, Canada), B. Bidulock, OpenSS7Corporation. Distributed with package strss7-0.9.2. <http://www.openss7.org/specs/mtpi.pdf>