LCP

Link control protocol. More...

Collaboration diagram for LCP:

Functions
void	LcpRxProtRej (NUTDEVICE *dev)
void	NutLcpInput (NUTDEVICE *dev, NETBUF *nb)
	Handle incoming LCP packets.
int	NutLcpOutput (NUTDEVICE *dev, uint8_t code, uint8_t id, NETBUF *nb)
	Send a LCP packet.
void	LcpTxConfReq (NUTDEVICE *dev, uint8_t id, uint8_t rejected)
void	LcpTxProtRej (NUTDEVICE *dev, uint16_t protocol, NETBUF *nb)
Variables
uint32_t	new_magic
uint32_t	new_magic

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Detailed Description

Link control protocol.

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Function Documentation

void LcpRxProtRej

(

NUTDEVICE *

dev

)

References _PPPDCB::dcb_lcp_state, _PPPDCB::dcb_reqid, _NUTDEVICE::dev_dcb, IpcpLowerDown(), NutIpcpOutput(), PPPS_ACKRCVD, PPPS_ACKSENT, PPPS_CLOSED, PPPS_CLOSING, PPPS_OPENED, PPPS_REQSENT, PPPS_STOPPED, PPPS_STOPPING, and XCP_TERMREQ.

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void NutLcpInput	(	NUTDEVICE *	dev,
		NETBUF *	nb
	)

Handle incoming LCP packets.

Packets not destined to us or packets with unsupported address type or item length are silently discarded.

Note:

This routine is called by the Ethernet layer on incoming ARP packets. Applications typically do not call this function.

Parameters:

dev	Identifies the device that received the packet.
nb	Pointer to a network buffer structure containing the ARP packet.

References _PPPDCB::dcb_lcp_state, _NUTDEVICE::dev_dcb, htons, LCP_DRQ, LCP_ERP, LCP_ERQ, _NETBUF::nb_ap, _NETBUF::nb_nw, NutNetBufFree(), PPPS_INITIAL, PPPS_STARTING, _NBDATA::sz, _NBDATA::vp, xcphdr::xch_code, xcphdr::xch_id, xcphdr::xch_len, XCP_CODEREJ, XCP_CONFACK, XCP_CONFNAK, XCP_CONFREJ, XCP_CONFREQ, XCP_TERMACK, and XCP_TERMREQ.

Referenced by NutPppInput().

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int NutLcpOutput	(	NUTDEVICE *	dev,
		uint8_t	code,
		uint8_t	id,
		NETBUF *	nb
	)

Send a LCP packet.

Note:

Applications typically do not call this function.

Parameters:

dev	Identifies the device to use.
code	Type subcode.
id	Exchange identifier.
nb	Network buffer structure containing the packet to send or null if the packet contains no information. The structure must have been allocated by a previous call NutNetBufAlloc() and will be freed when this function returns.

Returns:

0 on success, -1 in case of any errors.

References htons, _NETBUF::nb_ap, _NETBUF::nb_nw, _NETBUF::nb_tp, NBAF_NETWORK, NutNetBufAlloc(), NutNetBufFree(), NutPppOutput(), PPP_LCP, _NBDATA::sz, _NBDATA::vp, xcphdr::xch_code, xcphdr::xch_id, and xcphdr::xch_len.

Referenced by LcpClose(), LcpTxConfReq(), LcpTxProtRej(), and NutPppSm().

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void LcpTxConfReq	(	NUTDEVICE *	dev,
		uint8_t	id,
		uint8_t	rejected
	)

References _PPPDCB::dcb_acked, _PPPDCB::dcb_lcp_naks, _PPPDCB::dcb_lcp_state, _PPPDCB::dcb_neg_magic, _PPPDCB::dcb_retries, _NUTDEVICE::dev_dcb, htonl, LCP_ASYNCMAP, LCP_DEFOPT_ASYNCMAP, LCP_MAGICNUMBER, _NETBUF::nb_ap, NBAF_APPLICATION, NutLcpOutput(), NutNetBufAlloc(), PPPS_ACKRCVD, PPPS_ACKSENT, PPPS_REQSENT, XCPOPT::ul, _NBDATA::vp, XCP_CONFREQ, XCPOPT::xcpo_, XCPOPT::xcpo_len, and XCPOPT::xcpo_type.

Referenced by LcpLowerUp(), LcpOpen(), and NutPppSm().

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void LcpTxProtRej	(	NUTDEVICE *	dev,
		uint16_t	protocol,
		NETBUF *	nb
	)

References _PPPDCB::dcb_rejid, _NUTDEVICE::dev_dcb, htons, LCP_PROTREJ, memcpy(), _NETBUF::nb_ap, _NETBUF::nb_nw, NBAF_APPLICATION, NutLcpOutput(), NutNetBufAlloc(), NutNetBufFree(), _NBDATA::sz, and _NBDATA::vp.

Referenced by NutPppInput().

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Variable Documentation

uint32_t new_magic

Referenced by NutPppSm().

uint32_t new_magic