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KwikNet PPP Option

DAK

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6. KwikNet PPP Option

6.1 Introduction to PPP

The Point-to-Point Protocol (PPP) is a network protocol used to control the delivery of IP

datagrams between two host computers interconnected by a serial link. The

KwikNet PPP

option adds this protocol to the KwikNet TCP/IP Stack, a compact, reliable, high

performance TCP/IP stack, well suited for use in embedded networking applications.

PPP offers improved reliability and security features not found in SLIP, the Serial Line

Internet Protocol included with KwikNet.

The KwikNet PPP option is best used with a real-time operating system (RTOS) such as

KADAK's AMX

™

Real-Time Multitasking Kernel. However, the KwikNet PPP option

can also be used in a single threaded environment without an RTOS. The KwikNet Porting

Kit User's Guide describes the use of KwikNet with your choice of RT/OS. Note that

throughout this chapter, the term RT/OS is used to refer to any operating system, be it a

multitasking RTOS or a single threaded OS.

You can readily tailor the KwikNet stack to accommodate your PPP needs by using the

KwikNet Configuration Builder, a Windows

utility which makes configuring KwikNet a

snap. Your KwikNet stack will only include the PPP features required by your application.

The Point-to-Point Protocol (PPP) is formally defined by the IETF document RFC-1661.

That document describes the Link Control Protocol (LCP) used by PPP to negotiate the

configuration of the link over which communication will occur.

IETF document RFC-1334 describes the Password Authentication Protocol (PAP) first

used by PPP to provide link authentication prior to network use. That protocol has been

updated by the Challenge-Handshake Authentication Protocol (CHAP) described by

IETF document RFC-1994.

The MS-CHAP variation of the CHAP protocol introduced by Microsoft Corporation and

described in IETF document RFC-2433 is also supported by the KwikNet PPP option.

The Extensible Authentication Protocol (EAP), described in IETF document RFC-3748,

defines the manner in which a uniquely specified authentication sequence can be used by

two PPP peers, as long as each is cognizant of the extended specification.

The IP Control Protocol (IPCP), described in IETF document RFC-1332, defines the

manner in which IP datagrams are delivered over the link established by PPP. KwikNet

also supports the Name Server Address extension to IPCP as defined in RFC-1877.

The

KwikNet PPP option is compliant with these specifications. The RFCs should be

consulted for any detailed questions concerning the PPP protocol.

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AMX DESIGN XPRESS V 1.5 - PROGRAMMER GUIDE User's Guide Page 239