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if_sppp.h
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if_sppp.h
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/*
* 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 2.0, Fri Oct 6 20:39:21 MSK 1995
*
* $Id: if_sppp.h,v 1.13 1998/12/27 21:30:44 phk Exp $
*/
#ifndef _NET_IF_SPPP_H_
#define _NET_IF_SPPP_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 IPCP_MYADDR_SEEN 4 /* have seen his address already */
};
#define AUTHNAMELEN 32
#define AUTHKEYLEN 16
struct sauth {
u_short proto; /* authentication protocol to use */
u_short flags;
#define AUTHFLAG_NOCALLOUT 1 /* do not require authentication on */
/* callouts */
#define AUTHFLAG_NORECHALLENGE 2 /* do not re-challenge CHAP */
u_char name[AUTHNAMELEN]; /* system identification name */
u_char secret[AUTHKEYLEN]; /* secret password */
u_char challenge[AUTHKEYLEN]; /* random challenge */
};
#define IDX_PAP 2
#define IDX_CHAP 3
#define IDX_COUNT (IDX_CHAP + 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 callout_handle ch[IDX_COUNT]; /* per-proto and if callouts */
struct callout_handle pap_my_to_ch; /* PAP needs one more... */
struct slcp lcp; /* LCP params */
struct sipcp ipcp; /* IPCP params */
struct sauth myauth; /* auth params, i'm peer */
struct sauth hisauth; /* auth params, i'm authenticator */
/*
* 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);
/*
* These (optional) functions may be filled by the hardware
* driver if any notification of established connections
* (currently: IPCP up) is desired (pp_con) or any internal
* state change of the interface state machine should be
* signaled for monitoring purposes (pp_chg).
*/
void (*pp_con)(struct sppp *sp);
void (*pp_chg)(struct sppp *sp, int new_state);
/* These two fields are for use by the lower layer */
void *pp_lowerp;
int pp_loweri;
};
#define PP_KEEPALIVE 0x01 /* use keepalive protocol */
#define PP_CISCO 0x02 /* use Cisco protocol instead of PPP */
/* 0x04 was PP_TIMO */
#define PP_CALLIN 0x08 /* we are being called */
#define PP_NEEDAUTH 0x10 /* remote requested authentication */
#define PP_MTU 1500 /* default/minimal MRU */
#define PP_MAX_MRU 2048 /* maximal MRU we want to negotiate */
/*
* Definitions to pass struct sppp data down into the kernel using the
* SIOC[SG]IFGENERIC ioctl interface.
*
* In order to use this, create a struct spppreq, fill in the cmd
* field with SPPPIOGDEFS, and put the address of this structure into
* the ifr_data portion of a struct ifreq. Pass this struct to a
* SIOCGIFGENERIC ioctl. Then replace the cmd field by SPPPIOCDEFS,
* modify the defs field as desired, and pass the struct ifreq now
* to a SIOCSIFGENERIC ioctl.
*/
#define SPPPIOGDEFS ((caddr_t)(('S' << 24) + (1 << 16) + sizeof(struct sppp)))
#define SPPPIOSDEFS ((caddr_t)(('S' << 24) + (2 << 16) + sizeof(struct sppp)))
struct spppreq {
int cmd;
struct sppp defs;
};
#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, u_long cmd, void *data);
struct mbuf *sppp_dequeue (struct ifnet *ifp);
struct mbuf *sppp_pick(struct ifnet *ifp);
int sppp_isempty (struct ifnet *ifp);
void sppp_flush (struct ifnet *ifp);
#endif
#endif /* _NET_IF_SPPP_H_ */