SS7 TCAP User Adaptation Layer (TUA)
Description: OpenSS7 Project Manual Pages SIGTRAN Stack
TUA
Section: OpenSS7 STREAMS SIGTRAN Devices (4)
Updated: 2008-10-31
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NAME
TUA
- SS7 TCAP User Adaptation Layer (TUA)
SYNOPSIS
#include <ss7/tcapi.h>
#include <ss7/tcapi_ioctl.h>
#include <ss7/tua_ioctl.h>
-
int tua_stream = open(device, flags);
-
int tua_xtistr = t_open(device, flags);
-
int tua_socket = socket(PF_SS7, socket_type, SS7PROTO_TUA);
DESCRIPTION
TUA
is an implementation of the SS7 TCAP User Adaptation Layer (TUA)[1].
TUA
provides a back haul of the services of
tcap(4)
over an IP network using Stream Control Transmission Protocol,
sctp(4),
as defined in RFC 2960[2].
In addition it provides a building block of redundant
and distributed SS7 systems. (See
``NOTICES'',
below.)
TUA
is implemented as a
STREAMS(4)
multiplexing driver for
LiS(9)[3].
tcap(4) or sctp(4)
streams are lined under the
TUA
multiplexing driver using the
I_LINK or I_PLINK
commands of
streamio(7),
to provide transport or direct TCAP services to
TUA.
Once linked, the streams must be configured using
tuas_ioctl(4).
This procedure is normally performed by the
SS7 Configuration Daemon,
ss7confd(8).
TUA
provides the following stream types that are directly compatible with the
stream types provided by
tcap(4).
To select one of these stream types,
device
can be one of the following:
- /dev/tua
- This device provides the
TCAP
protocol service interface using the TR- and TC-primitives of the Transaction
Component Interface (TCI) described in
tcapi(7).
This interface is suitable for use with other SS7 modules and drivers.
- /dev/tua-tpi
- This device provides the
TCAP
protocol service interface using the T-primitives of the Transport Provider
Interface[4],
tpi(7),
used for the Transaction Capabilities Application Part as described in
tcap_tpi(7).
The
tpi(7)
interface provided on a stream opening this device is a suitable device for
use with
xnet(3)
or
xti(3)
library
t_open(3)
call and provides the
TCAP
interface using XTI[5, 6]
as described in
xti_tcap(3).
TUA
provides three socket types used by the
sockets(3)
library
socket(3)
call.
TUA
provides sockets in the protocol family
PF_SS7
using the protocol number
SS7PROTO_TUA.
The
socket_type
argument can be one of the following:
- SOCK_DGRAM
- Provides a connection-less datagram service without regard to order. This is a
TCAP
operations class 1 or 2 service provider.
- SOCK_RDM
- Provides a connectiono-less reliable datagram service with regard to order.
This is a
TCAP
operations class 3 or 4 service provider.
- SOCK_SEQPACKET
- Provides a connection oriented reliable datagram service with or without
receipt confirmation and flow control. This is a
TCAP
operations class 5 service provider.
NOTICES
TUA
can be configured on a system as a drop in transparent replacement for
tcap(4).
In such a configuration, users opening streams or sockets as defined in
tcap(4)
will be opening
tua
streams and sockets, but will be unaware of the difference. In
OpenSS7,
sua
is used as the primary mechanism of redundancy and distribution at the
TCAP
level, and, when properly configured (see
ss7confd(8)),
tua
functions transparently to the TCAP-User.
Also, opening and binding a
tua
stream or socket may result in the opening and binding of a
tcap(4)
stream on the local or remote host in direct support of the local TCAP-User.
IOCTLS
All interfaces support a set of management IO controls using
ioctl(2)
system calls on the
tua_stream, tua_xtistr or tua_socket
file descriptor or socket. These management controls are documented in
tua_ioctl(4).
In addition,
tua
supports
tcap(4)
IO controls. See
tcap_ioctl(4).
DEVICES
/dev/tua, /dev/tua-tpi.
FILES
<ss7/tcapi.h>,
<ss7/tcapi_ioctl.h>,
<ss7/tua_ioctl.h>,
<sys/tpi.h>,
<sys/tpi_ss7.h>,
<sys/tpi_mtp.h>,
<sys/tpi_sccp.h>,
<sys/tpi_tcap.h>,
<xti.h>,
<xti_tcap.h>,
<sys/socket.h>.
SEE ALSO
ss7confd(8),
tcapi(7),
tcap_tpi(7),
xti_tcap(3),
tcao_socket(7),
sockets(3),
xnet(3),
tua_ioctl(4),
tcap_ioctl(4).
REFERENCES
- [1]
- draft-bidulock-sigtran-tua-01.txt,
SS7 TCAP-User Adaptation Layer (TUA), January 2, 2003, Brian Bidulock, ed., Internet Engineering Task Force --- Signalling Transport Working Group.
Work In Progress. (Expired)
<http://www.ietf.org/internet-drafts/draft-bidulock-sigtran-tua-01.txt>
- [2]
- RFC 2960,
Stream Control Transmission Protocol (SCTP), October 2000, Randall R. Stewart, ed., The Internet Society.
(Obsoleted by RFC 4960) (Updated by RFC 3309) (Status: PROPOSED STANDARD)
<http://www.ietf.org/rfc/rfc2960.txt>
- [3]
- LIS 2.18,
Linux STREAMS (LiS) 2.18.6 Source Code, Brian Bidulock, ed., OpenSS7 Corporation.
<http://www.openss7.org/>
- [4]
- TPI Revision 2.0.0,
Open Group CAE Specification:
Transport Provider Interface (TPI) Specification, Revision 2.0.0, Draft 2, 1999, (Berkshire, UK), OpenGroup, Open Group Publication.
<http://www.opengroup.org/onlinepubs/>
- [5]
- XTI/TLI Revision 1.0,
Open Group CAE Specification:
XOpen Transport Interface, Revision 1, n.d., (Berkshire, UK), XPG, X Programmer's Group.
<http://www.opengroup.org/onlinepubs/>
- [6]
- 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/>
TRADEMARKS
- OpenSS7tm
- is a trademark of OpenSS7 Corporation.
- Linux®
- is a registered trademark of Linus Torvalds.
- UNIX®
- is a registered trademark of The Open Group.
- Solaris®
- is a registered trademark of Sun Microsystems.
Other trademarks are the property of their respective owners.
IDENTIFICATION
-
OpenSS7 STREAMS SIGTRAN: Package sigtran version 0.9.2.4 released 2008-10-31.
Copyright©1997-2008OpenSS7 Corp.
All Rights Reserved.
(See roff source for permission notice.)
Index
- NAME
- SYNOPSIS
- DESCRIPTION
- NOTICES
- IOCTLS
- DEVICES
- FILES
- SEE ALSO
- REFERENCES
- TRADEMARKS
- IDENTIFICATION
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