Transport Design

INET Interface Specifications

The INET stack uses the same set of interface specifications which are used by OSI. This permits INET components and ISO components to be used interchangeably for transport.

Following is a table listing the pertinent INET interfaces and the primary reference, specifications document and header files at each level:

Interface	Reference (PDF)	Specification Document		Manual Page	Header Files
TPI Transport Provider Interface	tpi.pdf	html	tpi.pdf	tpi(7)	tpi.h tpi_ip.h tpi_udp.h tpi_tcp.h tpi_sctp.h tpi_sccop.h
XTI X/Open Transport Interface	pdf	html	pdf	xti(3)	xti.h xti_ip.h xti_udp.h xti_tcp.h xti_sctp.h xti_sccop.h
NPI Network Provider Interface	npi.pdf	html	npi.pdf	npi(7)	npi.h npi_ip.h npi_udp.h npi_tcp.h npi_sctp.h npi_sccop.h
XNS Sockets Interface	pdf	html	pdf	sockets(3)	socket.h inet.h udp.h tcp.h sctp.h sctp.h sccop.h

INET Stack Components

Component	Status	Reference	Interface Specs	Design Docs		Manual Page		Test Results
SCTP Stream Control Transmission Protocol	status	refs	xti_sctp(3) tpi_sctp(7) npi_sctp(7) sctp(7)	html	pdf	html	pdf	html	pdf
TCP Transport Control Protocol	status	refs	xti_tcp(3) tpi_tcp(7) tcp(7)	html	pdf	html	pdf	html	pdf
UDP User Datagram Protocol	status	refs	xti_udp(3) tpi_udp(7) udp(7)	html	pdf	html	pdf	html	pdf
SSCOP-MCE Service-Specific Connection Oriented Protocol for Multi-Cast Environments	status	refs	xti_sscop(3) tpi_sscop(7) npi_sscop(7) sscop(7)	html	pdf	html	pdf	html	pdf
IP Internet Protocol	status	refs	xti_ip(3) tpi_ip(7) ip(7)	html	pdf	html	pdf	html	pdf