NG_RFC1490(4)

NAME
ng_rfc1490 - RFC 1490 netgraph node type

SYNOPSIS
#include <netgraph/rfc1490/ng_rfc1490.h>

DESCRIPTION
The rfc1490 node type performs protocol encapsulation, de-encapsulation, and multiplexing according to RFC 1490 (which has since been updated by RFC 2427). This particular type of encapsulation is often used on top of frame relay DLCI channels.

The downstream hook is used to transmit and receive encapsulated frames. On the other side of the node, the inet and ppp hooks are used to transmit and receive raw IP frames and PPP frames, respectively. PPP frames are transmitted and received according to RFC 1973; in particular, frames appearing on the ppp hook begin with the PPP protocol number.

Typically the inet hook is connected to the inet hook of an ng_iface(4) node.

HOOKS
This node type supports the following hooks:

downstream
    Connects to the RFC 1490 peer entity.

inet
    Transmits and receives raw IP frames.

ppp Transmits and receives PPP frames.

CONTROL MESSAGES
This node type only supports the generic control messages.

SHUTDOWN
This node shuts down upon receipt of a NGM_SHUTDOWN control message, or when all hooks have been disconnected.

SEE ALSO
netgraph(4), ng_frame_relay(4), ng_iface(4), ngctl(8) C. Brown, A. Malis, Multiprotocol Interconnect over Frame Relay, RFC 2427. W. Simpson, PPP in Frame Relay, RFC 1973.

HISTORY
The ng_rfc1490 node type was implemented in FreeBSD 4.0.

AUTHORS
Julian Elischer <julian@FreeBSD.org>

BUGS
Not all of RFC 1490 is implemented.