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235 lines
8.4 KiB
C
235 lines
8.4 KiB
C
/*
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* Defines for synchronous PPP/Cisco/Frame Relay link level subroutines.
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*/
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/*-
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* Copyright (C) 1994-2000 Cronyx Engineering.
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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 2.0, Fri Oct 6 20:39:21 MSK 1995
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*
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* $FreeBSD$
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*/
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#ifndef _NET_IF_SPPP_H_
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#define _NET_IF_SPPP_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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#define IDX_IPV6CP 2 /* 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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#define IPCP_MYADDR_SEEN 4 /* have seen his address already */
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#ifdef notdef
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#define IPV6CP_MYIFID_DYN 8 /* my ifid is dynamically assigned */
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#endif
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#define IPV6CP_MYIFID_SEEN 0x10 /* have seen his ifid already */
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#define IPCP_VJ 0x20 /* can use VJ compression */
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int max_state; /* VJ: Max-Slot-Id */
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int compress_cid; /* VJ: Comp-Slot-Id */
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};
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#define AUTHNAMELEN 64
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#define AUTHKEYLEN 16
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struct sauth {
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u_short proto; /* authentication protocol to use */
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u_short flags;
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#define AUTHFLAG_NOCALLOUT 1 /* do not require authentication on */
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/* callouts */
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#define AUTHFLAG_NORECHALLENGE 2 /* do not re-challenge CHAP */
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u_char name[AUTHNAMELEN]; /* system identification name */
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u_char secret[AUTHKEYLEN]; /* secret password */
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u_char challenge[AUTHKEYLEN]; /* random challenge */
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};
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#define IDX_PAP 3
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#define IDX_CHAP 4
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#define IDX_COUNT (IDX_CHAP + 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 comparison 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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#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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/*
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* This is a cut down struct sppp (see below) that can easily be
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* exported to/ imported from userland without the need to include
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* dozens of kernel-internal header files. It is used by the
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* SPPPIO[GS]DEFS ioctl commands below.
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*/
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struct sppp_parms {
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enum ppp_phase pp_phase; /* phase we're currently in */
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int enable_vj; /* VJ header compression enabled */
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int enable_ipv6; /*
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* Enable IPv6 negotiations -- only
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* needed since each IPv4 i/f auto-
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* matically gets an IPv6 address
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* assigned, so we can't use this as
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* a decision.
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*/
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struct slcp lcp; /* LCP params */
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struct sipcp ipcp; /* IPCP params */
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struct sipcp ipv6cp; /* IPv6CP params */
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struct sauth myauth; /* auth params, i'm peer */
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struct sauth hisauth; /* auth params, i'm authenticator */
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};
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/*
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* Definitions to pass struct sppp_parms data down into the kernel
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* using the SIOC[SG]IFGENERIC ioctl interface.
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*
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* In order to use this, create a struct spppreq, fill in the cmd
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* field with SPPPIOGDEFS, and put the address of this structure into
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* the ifr_data portion of a struct ifreq. Pass this struct to a
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* SIOCGIFGENERIC ioctl. Then replace the cmd field by SPPPIOSDEFS,
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* modify the defs field as desired, and pass the struct ifreq now
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* to a SIOCSIFGENERIC ioctl.
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*/
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#define SPPPIOGDEFS ((caddr_t)(('S' << 24) + (1 << 16) +\
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sizeof(struct sppp_parms)))
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#define SPPPIOSDEFS ((caddr_t)(('S' << 24) + (2 << 16) +\
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sizeof(struct sppp_parms)))
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struct spppreq {
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int cmd;
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struct sppp_parms defs;
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};
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#ifdef _KERNEL
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struct sppp {
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struct ifnet *pp_ifp; /* network interface data */
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struct ifqueue pp_fastq; /* fast output queue */
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struct ifqueue pp_cpq; /* PPP control protocol queue */
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struct sppp *pp_next; /* next interface in keepalive list */
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u_int pp_mode; /* major protocol modes (cisco/ppp/...) */
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u_int pp_flags; /* sub modes */
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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[IDX_COUNT]; /* local sequence number */
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u_long pp_rseq[IDX_COUNT]; /* 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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int confflags; /* administrative configuration flags */
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#define CONF_ENABLE_VJ 0x01 /* VJ header compression enabled */
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#define CONF_ENABLE_IPV6 0x02 /* IPv6 administratively enabled */
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time_t pp_last_recv; /* time last packet has been received */
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time_t pp_last_sent; /* time last packet has been sent */
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struct callout ch[IDX_COUNT]; /* per-proto and if callouts */
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struct callout pap_my_to_ch; /* PAP needs one more... */
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struct callout keepalive_callout; /* keepalive callout */
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struct slcp lcp; /* LCP params */
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struct sipcp ipcp; /* IPCP params */
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struct sipcp ipv6cp; /* IPv6CP params */
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struct sauth myauth; /* auth params, i'm peer */
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struct sauth hisauth; /* auth params, i'm authenticator */
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struct slcompress *pp_comp; /* for VJ compression */
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u_short fr_dlci; /* Frame Relay DLCI number, 16..1023 */
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u_char fr_status; /* PVC status, active/new/delete */
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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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* These (optional) functions may be filled by the hardware
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* driver if any notification of established connections
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* (currently: IPCP up) is desired (pp_con) or any internal
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* state change of the interface state machine should be
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* signaled for monitoring purposes (pp_chg).
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*/
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void (*pp_con)(struct sppp *sp);
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void (*pp_chg)(struct sppp *sp, int new_state);
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/* These two fields are for use by the lower layer */
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void *pp_lowerp;
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int pp_loweri;
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/* Lock */
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struct mtx mtx;
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/* if_start () wrapper */
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void (*if_start) (struct ifnet *);
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struct callout ifstart_callout; /* if_start () scheduler */
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};
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#define IFP2SP(ifp) ((struct sppp *)(ifp)->if_l2com)
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#define SP2IFP(sp) ((sp)->pp_ifp)
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/* bits for pp_flags */
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#define PP_KEEPALIVE 0x01 /* use keepalive protocol */
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#define PP_FR 0x04 /* use Frame Relay protocol instead of PPP */
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/* 0x04 was PP_TIMO */
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#define PP_CALLIN 0x08 /* we are being called */
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#define PP_NEEDAUTH 0x10 /* remote requested authentication */
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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, u_long cmd, void *data);
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struct mbuf *sppp_dequeue (struct ifnet *ifp);
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struct mbuf *sppp_pick(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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/* Internal functions */
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void sppp_fr_input (struct sppp *sp, struct mbuf *m);
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struct mbuf *sppp_fr_header (struct sppp *sp, struct mbuf *m, int fam);
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void sppp_fr_keepalive (struct sppp *sp);
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void sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst,
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u_long *srcmask);
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#endif
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#endif /* _NET_IF_SPPP_H_ */
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