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/*
* Defines for synchronous PPP/Cisco/Frame Relay link level subroutines.
*/
/*-
* Copyright (C) 1994-2000 Cronyx Engineering.
* 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
*
* $FreeBSD: release/9.1.0/sys/net/if_sppp.h 147256 2005-06-10 16:49:24Z brooks $
*/
#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 */
#define IDX_IPV6CP 2 /* 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 */
#ifdef notdef
#define IPV6CP_MYIFID_DYN 8 /* my ifid is dynamically assigned */
#endif
#define IPV6CP_MYIFID_SEEN 0x10 /* have seen his ifid already */
#define IPCP_VJ 0x20 /* can use VJ compression */
int max_state; /* VJ: Max-Slot-Id */
int compress_cid; /* VJ: Comp-Slot-Id */
};
#define AUTHNAMELEN 64
#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 3
#define IDX_CHAP 4
#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
};
#define PP_MTU 1500 /* default/minimal MRU */
#define PP_MAX_MRU 2048 /* maximal MRU we want to negotiate */
/*
* This is a cut down struct sppp (see below) that can easily be
* exported to/ imported from userland without the need to include
* dozens of kernel-internal header files. It is used by the
* SPPPIO[GS]DEFS ioctl commands below.
*/
struct sppp_parms {
enum ppp_phase pp_phase; /* phase we're currently in */
int enable_vj; /* VJ header compression enabled */
int enable_ipv6; /*
* Enable IPv6 negotiations -- only
* needed since each IPv4 i/f auto-
* matically gets an IPv6 address
* assigned, so we can't use this as
* a decision.
*/
struct slcp lcp; /* LCP params */
struct sipcp ipcp; /* IPCP params */
struct sipcp ipv6cp; /* IPv6CP params */
struct sauth myauth; /* auth params, i'm peer */
struct sauth hisauth; /* auth params, i'm authenticator */
};
/*
* Definitions to pass struct sppp_parms 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 SPPPIOSDEFS,
* 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_parms)))
#define SPPPIOSDEFS ((caddr_t)(('S' << 24) + (2 << 16) +\
sizeof(struct sppp_parms)))
struct spppreq {
int cmd;
struct sppp_parms defs;
};
#ifdef _KERNEL
struct sppp {
struct ifnet *pp_ifp; /* 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_mode; /* major protocol modes (cisco/ppp/...) */
u_int pp_flags; /* sub modes */
u_short pp_alivecnt; /* keepalive packets counter */
u_short pp_loopcnt; /* loopback detection counter */
u_long pp_seq[IDX_COUNT]; /* local sequence number */
u_long pp_rseq[IDX_COUNT]; /* 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 */
int confflags; /* administrative configuration flags */
#define CONF_ENABLE_VJ 0x01 /* VJ header compression enabled */
#define CONF_ENABLE_IPV6 0x02 /* IPv6 administratively enabled */
time_t pp_last_recv; /* time last packet has been received */
time_t pp_last_sent; /* time last packet has been sent */
struct callout ch[IDX_COUNT]; /* per-proto and if callouts */
struct callout pap_my_to_ch; /* PAP needs one more... */
struct callout keepalive_callout; /* keepalive callout */
struct slcp lcp; /* LCP params */
struct sipcp ipcp; /* IPCP params */
struct sipcp ipv6cp; /* IPv6CP params */
struct sauth myauth; /* auth params, i'm peer */
struct sauth hisauth; /* auth params, i'm authenticator */
struct slcompress *pp_comp; /* for VJ compression */
u_short fr_dlci; /* Frame Relay DLCI number, 16..1023 */
u_char fr_status; /* PVC status, active/new/delete */
/*
* 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;
/* Lock */
struct mtx mtx;
/* if_start () wrapper */
void (*if_start) (struct ifnet *);
struct callout ifstart_callout; /* if_start () scheduler */
};
#define IFP2SP(ifp) ((struct sppp *)(ifp)->if_l2com)
#define SP2IFP(sp) ((sp)->pp_ifp)
/* bits for pp_flags */
#define PP_KEEPALIVE 0x01 /* use keepalive protocol */
#define PP_FR 0x04 /* use Frame Relay protocol instead of PPP */
/* 0x04 was PP_TIMO */
#define PP_CALLIN 0x08 /* we are being called */
#define PP_NEEDAUTH 0x10 /* remote requested authentication */
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);
/* Internal functions */
void sppp_fr_input (struct sppp *sp, struct mbuf *m);
struct mbuf *sppp_fr_header (struct sppp *sp, struct mbuf *m, int fam);
void sppp_fr_keepalive (struct sppp *sp);
void sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst,
u_long *srcmask);
#endif
#endif /* _NET_IF_SPPP_H_ */