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.\" @(#)ns.4 1.6 (Berkeley) 3/28/91
.Nd Xerox Network Systems(tm) protocol family
protocol family is a collection of protocols
.Em Internet Datagram Protocol
transport layer, and using the Xerox
family provides protocol support for the
.Dv SOCK_STREAM , SOCK_DGRAM , SOCK_SEQPACKET ,
interface is a debugging tool, allowing you to trace all packets
entering, (or with toggling kernel variable, additionally leaving) the local
addresses are 12 byte quantities, consisting of a
4 byte Network number, a 6 byte Host number and a 2 byte port number,
all stored in network standard format.
these are word and byte reversed; on the
reversed). The include file
address as a structure containing unions (for quicker
Sockets in the Internet protocol family use the following
.Bd -literal -offset indent
.Bd -literal -offset indent
Sockets may be created with an address of all zeroes to effect
matching on incoming messages.
The local port address specified in a
call is restricted to be greater than
unless the creating process is running
as the super-user, providing a space of protected port numbers.
protocol family supported by the operating system
the Internet Datagram Protocol
Error Protocol (available through
Sequenced Packet Protocol
The Error protocol is responded to by the kernel
to handle and report errors in protocol processing;
only accessible to user programs through heroic actions.
.%T "Internet Transport Protocols"
.%R Xerox Corporation document XSIS
.%T "An Advanced 4.3 BSD Interprocess Communication Tutorial"