ppp_protocol_t Struct Reference

PPP Protocol structure. More...

#include <ppp/ppp.h>

Public Member Functions
	TAILQ_ENTRY (ppp_proto) entry
	Protocol list entry (not a function!).

Data Fields
const char *	name
	Protocol name ("lcp", "pap", etc).
uint16_t	code
	Protocol code.
void *	privdata
	Private data (if any).
int(*	init )(struct ppp_proto *self)
	Initialization function.
int(*	shutdown )(struct ppp_proto *self)
	Shutdown function.
int(*	input )(struct ppp_proto *self, const uint8_t *buf, size_t len)
	Protocol packet input function.
void(*	enter_phase )(struct ppp_proto *self, int oldp, int newp)
	Notify the protocol of a PPP phase change.
void(*	check_timeouts )(struct ppp_proto *self, uint64_t tm)
	Check timeouts for resending packets.

Detailed Description

PPP Protocol structure.

Each protocol that the PPP library can handle must have one of these registered. All protocols should be registered BEFORE attempting to actually establish a PPP session to ensure that each protocol can be used in the setup of the connection as needed.

Member Function Documentation

TAILQ_ENTRY()

ppp_protocol_t::TAILQ_ENTRY

(

ppp_proto

)

Protocol list entry (not a function!).

Field Documentation

check_timeouts

void(* ppp_protocol_t::check_timeouts) (struct ppp_proto *self, uint64_t tm)

Check timeouts for resending packets.

This function will be called periodically to allow the protocol to check any resend timers that it might have responsibility for.

Parameters

self	The protocol structure for this protocol.
tm	The current system time for checking timeouts against (in milliseconds since system startup).

code

uint16_t ppp_protocol_t::code

Protocol code.

enter_phase

void(* ppp_protocol_t::enter_phase) (struct ppp_proto *self, int oldp, int newp)

Notify the protocol of a PPP phase change.

This function will be called by the PPP automaton any time that a phase change is initiated. This is often used for starting up a protocol when appropriate to do so (for instance, LCP uses this to begin negotiating configuration options with the peer when the establish phase is entered by the automaton).

Parameters

self	The protocol structure for this protocol.
oldp	The old phase (the one the automaton is leaving).
newp	The new phase.

See also

Automaton Phases

init

int(* ppp_protocol_t::init) (struct ppp_proto *self)

Initialization function.

Parameters

self	The protocol structure for this protocol.

Returns

0 on success, <0 on failure.

Note

Set to NULL if this is not needed in the protocol.

input

int(* ppp_protocol_t::input) (struct ppp_proto *self, const uint8_t *buf, size_t len)

Protocol packet input function.

This function will be called for each packet delivered to the specified protocol.

Parameters

self	The protocol structure for this protocol.
pkt	The packet being delivered.
len	The length of the packet in bytes.

Returns

0 on success, <0 on failure.

name

const char* ppp_protocol_t::name

Protocol name ("lcp", "pap", etc).

privdata

void* ppp_protocol_t::privdata

Private data (if any).

shutdown

int(* ppp_protocol_t::shutdown) (struct ppp_proto *self)

Shutdown function.

This function should perform any protocol-specific shutdown actions and unregister the protocol from the PPP protocol list.

Parameters

self	The protocol structure for this protocol.

Returns

0 on success, <0 on failure.

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The documentation for this struct was generated from the following file:

• addons/include/ppp/ppp.h