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00081cc989
full implementation of the sate machine as described in RFC1661, and provides support for plugging in various control protocols. I needed this to provide PPP support for the BISDN project (right now). Unfortunatley, while the existing API was almost up to the point, i needed one minor API change in order to decouple the this-layer- started and this-layer-finished actions from the respective Up and Down events of the lower layer. This requires two additional lines in the attach routines of all existing lower layer interface drivers that are using syncPPP (shortcutting these actions and events). Apart from this, i believe i didn't change the API of all this, so everything should plug in without too many hassles. Please report if i broke something in the existing drivers. For a list of features (including new ones like dial-on-demand), and things still to be done, please refer to the man page i'll commit asap. Encouraged by: Serge Vakulenko <vak@cronyx.ru>
116 lines
3.9 KiB
C
116 lines
3.9 KiB
C
/*
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* Defines for synchronous PPP/Cisco link level subroutines.
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*
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* Copyright (C) 1994 Cronyx Ltd.
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* Author: Serge Vakulenko, <vak@cronyx.ru>
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*
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* Heavily revamped to conform to RFC 1661.
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* Copyright (C) 1997, Joerg Wunsch.
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*
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* This software is distributed with NO WARRANTIES, not even the implied
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* warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Authors grant any other persons or organizations permission to use
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* or modify this software as long as this message is kept with the software,
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* all derivative works or modified versions.
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*
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* From: Version 1.7, Wed Jun 7 22:12:02 MSD 1995
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*
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* $Id$
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*/
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#ifndef _NET_IF_HDLC_H_
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#define _NET_IF_HDLC_H_ 1
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#define IDX_LCP 0 /* idx into state table */
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struct slcp {
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u_long opts; /* LCP options to send (bitfield) */
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u_long magic; /* local magic number */
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u_long mru; /* our max receive unit */
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u_long their_mru; /* their max receive unit */
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u_long protos; /* bitmask of protos that are started */
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u_char echoid; /* id of last keepalive echo request */
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/* restart max values, see RFC 1661 */
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int timeout;
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int max_terminate;
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int max_configure;
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int max_failure;
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};
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#define IDX_IPCP 1 /* idx into state table */
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struct sipcp {
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u_long opts; /* IPCP options to send (bitfield) */
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u_int flags;
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#define IPCP_HISADDR_SEEN 1 /* have seen his address already */
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#define IPCP_MYADDR_DYN 2 /* my address is dynamically assigned */
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};
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#define IDX_COUNT (IDX_IPCP + 1) /* bump this when adding cp's! */
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/*
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* Don't change the order of this. Ordering the phases this way allows
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* for a comparision of ``pp_phase >= PHASE_AUTHENTICATE'' in order to
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* know whether LCP is up.
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*/
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enum ppp_phase {
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PHASE_DEAD, PHASE_ESTABLISH, PHASE_TERMINATE,
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PHASE_AUTHENTICATE, PHASE_NETWORK
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};
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struct sppp {
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/* NB: pp_if _must_ be first */
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struct ifnet pp_if; /* network interface data */
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struct ifqueue pp_fastq; /* fast output queue */
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struct sppp *pp_next; /* next interface in keepalive list */
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u_int pp_flags; /* use Cisco protocol instead of PPP */
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u_short pp_alivecnt; /* keepalive packets counter */
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u_short pp_loopcnt; /* loopback detection counter */
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u_long pp_seq; /* local sequence number */
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u_long pp_rseq; /* remote sequence number */
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enum ppp_phase pp_phase; /* phase we're currently in */
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int state[IDX_COUNT]; /* state machine */
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u_char confid[IDX_COUNT]; /* id of last configuration request */
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int rst_counter[IDX_COUNT]; /* restart counter */
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int fail_counter[IDX_COUNT]; /* negotiation failure counter */
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struct slcp lcp; /* LCP params */
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struct sipcp ipcp; /* IPCP params */
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/*
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* These functions are filled in by sppp_attach(), and are
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* expected to be used by the lower layer (hardware) drivers
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* in order to communicate the (un)availability of the
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* communication link. Lower layer drivers that are always
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* ready to communicate (like hardware HDLC) can shortcut
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* pp_up from pp_tls, and pp_down from pp_tlf.
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*/
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void (*pp_up)(struct sppp *sp);
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void (*pp_down)(struct sppp *sp);
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/*
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* These functions need to be filled in by the lower layer
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* (hardware) drivers if they request notification from the
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* PPP layer whether the link is actually required. They
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* correspond to the tls and tlf actions.
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*/
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void (*pp_tls)(struct sppp *sp);
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void (*pp_tlf)(struct sppp *sp);
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};
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#define PP_KEEPALIVE 0x01 /* use keepalive protocol */
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#define PP_CISCO 0x02 /* use Cisco protocol instead of PPP */
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#define PP_MTU 1500 /* default/minimal MRU */
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#define PP_MAX_MRU 2048 /* maximal MRU we want to negotiate */
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#ifdef KERNEL
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void sppp_attach (struct ifnet *ifp);
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void sppp_detach (struct ifnet *ifp);
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void sppp_input (struct ifnet *ifp, struct mbuf *m);
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int sppp_ioctl (struct ifnet *ifp, int cmd, void *data);
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struct mbuf *sppp_dequeue (struct ifnet *ifp);
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int sppp_isempty (struct ifnet *ifp);
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void sppp_flush (struct ifnet *ifp);
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#endif
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#endif /* _NET_IF_HDLC_H_ */
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