freebsd-dev/sys/net/if_sppp.h
Joerg Wunsch 32ef6b86b5 Introduce a third queue per interface, serving only PPP control
protocol packets.  This queue is the only one being enabled until
network phase has been reached.
1997-05-22 22:15:39 +00:00

117 lines
4.0 KiB
C

/*
* Defines for synchronous PPP/Cisco link level subroutines.
*
* Copyright (C) 1994 Cronyx Ltd.
* Author: Serge Vakulenko, <vak@cronyx.ru>
*
* Heavily revamped to conform to RFC 1661.
* Copyright (C) 1997, Joerg Wunsch.
*
* This software is distributed with NO WARRANTIES, not even the implied
* warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Authors grant any other persons or organizations permission to use
* or modify this software as long as this message is kept with the software,
* all derivative works or modified versions.
*
* From: Version 1.7, Wed Jun 7 22:12:02 MSD 1995
*
* $Id: if_sppp.h,v 1.5 1997/05/19 22:03:08 joerg Exp $
*/
#ifndef _NET_IF_HDLC_H_
#define _NET_IF_HDLC_H_ 1
#define IDX_LCP 0 /* idx into state table */
struct slcp {
u_long opts; /* LCP options to send (bitfield) */
u_long magic; /* local magic number */
u_long mru; /* our max receive unit */
u_long their_mru; /* their max receive unit */
u_long protos; /* bitmask of protos that are started */
u_char echoid; /* id of last keepalive echo request */
/* restart max values, see RFC 1661 */
int timeout;
int max_terminate;
int max_configure;
int max_failure;
};
#define IDX_IPCP 1 /* idx into state table */
struct sipcp {
u_long opts; /* IPCP options to send (bitfield) */
u_int flags;
#define IPCP_HISADDR_SEEN 1 /* have seen his address already */
#define IPCP_MYADDR_DYN 2 /* my address is dynamically assigned */
};
#define IDX_COUNT (IDX_IPCP + 1) /* bump this when adding cp's! */
/*
* Don't change the order of this. Ordering the phases this way allows
* for a comparision of ``pp_phase >= PHASE_AUTHENTICATE'' in order to
* know whether LCP is up.
*/
enum ppp_phase {
PHASE_DEAD, PHASE_ESTABLISH, PHASE_TERMINATE,
PHASE_AUTHENTICATE, PHASE_NETWORK
};
struct sppp {
/* NB: pp_if _must_ be first */
struct ifnet pp_if; /* network interface data */
struct ifqueue pp_fastq; /* fast output queue */
struct ifqueue pp_cpq; /* PPP control protocol queue */
struct sppp *pp_next; /* next interface in keepalive list */
u_int pp_flags; /* use Cisco protocol instead of PPP */
u_short pp_alivecnt; /* keepalive packets counter */
u_short pp_loopcnt; /* loopback detection counter */
u_long pp_seq; /* local sequence number */
u_long pp_rseq; /* remote sequence number */
enum ppp_phase pp_phase; /* phase we're currently in */
int state[IDX_COUNT]; /* state machine */
u_char confid[IDX_COUNT]; /* id of last configuration request */
int rst_counter[IDX_COUNT]; /* restart counter */
int fail_counter[IDX_COUNT]; /* negotiation failure counter */
struct slcp lcp; /* LCP params */
struct sipcp ipcp; /* IPCP params */
/*
* These functions are filled in by sppp_attach(), and are
* expected to be used by the lower layer (hardware) drivers
* in order to communicate the (un)availability of the
* communication link. Lower layer drivers that are always
* ready to communicate (like hardware HDLC) can shortcut
* pp_up from pp_tls, and pp_down from pp_tlf.
*/
void (*pp_up)(struct sppp *sp);
void (*pp_down)(struct sppp *sp);
/*
* These functions need to be filled in by the lower layer
* (hardware) drivers if they request notification from the
* PPP layer whether the link is actually required. They
* correspond to the tls and tlf actions.
*/
void (*pp_tls)(struct sppp *sp);
void (*pp_tlf)(struct sppp *sp);
};
#define PP_KEEPALIVE 0x01 /* use keepalive protocol */
#define PP_CISCO 0x02 /* use Cisco protocol instead of PPP */
#define PP_MTU 1500 /* default/minimal MRU */
#define PP_MAX_MRU 2048 /* maximal MRU we want to negotiate */
#ifdef KERNEL
void sppp_attach (struct ifnet *ifp);
void sppp_detach (struct ifnet *ifp);
void sppp_input (struct ifnet *ifp, struct mbuf *m);
int sppp_ioctl (struct ifnet *ifp, int cmd, void *data);
struct mbuf *sppp_dequeue (struct ifnet *ifp);
int sppp_isempty (struct ifnet *ifp);
void sppp_flush (struct ifnet *ifp);
#endif
#endif /* _NET_IF_HDLC_H_ */