SCTP Administrator's Guide

— The netstat command
— The ndd command
— The nettl command
— Start and Stop script
— The sctpd application
The SCTP module: The SCTP module is a multiplexing driver that interacts with the
application and the IPv4 or IPv6 layer. It handles the messages received from and sent
to the applications, and the messages received from and sent to the IPv4 or IPv6 layer.
It contains a pair of upper (read and write) queues per application, and a pair of lower
queues each for IPv4 and IPv6. The Multiprocessor (MP) system uses the queue-pair
parallelism.
The Socket API: Socket API refers to a set of routines and definitions, which provide
access to network services. The draft-ieft-tsvwg-sctpsocket-10.txt defines the APIs for the
SCTP protocol.
SCTP socket API defines two styles of socket APIs: one-to-one and one-to-many. The
one-to-one style API is similar to the existing socket APIs for a connection-oriented
protocol, such as TCP. The one-to-many style API facilitates simultaneous associations
with multiple peers using one end point (that is, it associates with multiple peers using
one socket file descriptor simultaneously). The two socket API styles are mutually
exclusive; that is, a socket endpoint can either use one-to-one style API or one-to-many
style API, but not both. For more information about socket APIs, see the SCTP
Programmer’s Guide available at:
http://docs.hp.com/en/netcom.html
SCTP-based application: The SCTP-based application is a user level program that uses
the services of SCTP. The SCTP-based application interacts with the SCTP module
through the socket API to perform various operations.
The ndd command: The ndd command enables you to examine and modify the tunable
parameters that affect networking behavior and operations. The ndd command interacts
with the SCTP module through the command library, to manage and monitor network
operations. For more information about the ndd command, see “The ndd Command”
(page 18).
The netstat command: The netstat command enables you to obtain statistical
information about network interfaces and protocols. The netstat command interacts
with the SCTP module through the command library, to manage and monitor the
network operations. For more information about the netstat command, see “The
netstat Command” (page 23).
The nettl command: The nettl command is a tool used to capture network events
or packets. It is also used to control the network tracing and logging. The nettl
command interacts with the SCTP module through the tracing and logging library to
SCTP Architecture 17