254 lines
9.0 KiB
C
254 lines
9.0 KiB
C
/* $NetBSD: if_spppvar.h,v 1.42 2021/06/01 04:59:50 yamaguchi Exp $ */
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#ifndef _NET_IF_SPPPVAR_H_
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#define _NET_IF_SPPPVAR_H_
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/*
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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 2.0, Fri Oct 6 20:39:21 MSK 1995
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*
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* From: if_sppp.h,v 1.8 1997/10/11 11:25:20 joerg Exp
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*
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* From: Id: if_sppp.h,v 1.7 1998/12/01 20:20:19 hm Exp
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*/
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#include <sys/workqueue.h>
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#include <sys/pcq.h>
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struct sppp;
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struct sppp_work {
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struct work work;
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void *arg;
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void (*func)(struct sppp *, void *);
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unsigned int state;
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#define SPPP_WK_FREE 0
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#define SPPP_WK_BUSY 1
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#define SPPP_WK_UNAVAIL 2
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};
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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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/* multilink variables */
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u_long mrru; /* our max received reconstructed unit */
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u_long their_mrru; /* their max receive dreconstructed unit */
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bool reestablish; /* reestablish after the next down event */
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bool tlf_sent; /* call lower layer's tlf before a down event */
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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_SEEN 2 /* have a local address assigned already */
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#define IPCP_MYADDR_DYN 4 /* my address is dynamically assigned */
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#define IPCP_HISADDR_DYN 8 /* his address is dynamically assigned */
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#ifdef notdef
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#define IPV6CP_MYIFID_DYN 2 /* my ifid is dynamically assigned */
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#endif
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#define IPV6CP_MYIFID_SEEN 4 /* have seen his ifid already */
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uint32_t saved_hisaddr;/* if hisaddr (IPv4) is dynamic, save original one here, in network byte order */
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uint32_t req_hisaddr; /* remote address requested */
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uint32_t req_myaddr; /* local address requested */
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uint8_t my_ifid[8]; /* IPv6CP my ifid*/
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uint8_t his_ifid[8]; /* IPv6CP his ifid*/
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};
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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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char *name; /* system identification name */
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char *secret; /* secret password */
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u_char name_len; /* no need to have a bigger size */
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u_char secret_len; /* because proto gives size in a byte */
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};
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struct schap {
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char challenge[16]; /* random challenge
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[don't change size! it's really hardcoded!] */
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char digest[16];
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u_char digest_len;
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bool rechallenging; /* sent challenge after open */
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bool response_rcvd; /* receive response, stop sending challenge */
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struct sppp_work work_challenge_rcvd;
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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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struct sppp_cp {
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u_long seq; /* local sequence number */
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u_long rseq; /* remote sequence number */
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int state; /* state machine */
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u_char confid; /* local id of last configuration request */
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u_char rconfid; /* remote id of last configuration request */
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int rst_counter; /* restart counter */
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int fail_counter; /* negotiation failure counter */
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struct callout ch; /* per-proto and if callouts */
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u_char rcr_type; /* parsing result of conf-req */
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struct mbuf *mbuf_confreq; /* received conf-req */
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struct mbuf *mbuf_confnak; /* received conf-nak or conf-rej */
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struct sppp_work work_up;
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struct sppp_work work_down;
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struct sppp_work work_open;
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struct sppp_work work_close;
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struct sppp_work work_to;
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struct sppp_work work_rcr;
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struct sppp_work work_rca;
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struct sppp_work work_rcn;
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struct sppp_work work_rtr;
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struct sppp_work work_rta;
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struct sppp_work work_rxj;
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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 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_flags; /* use Cisco protocol instead of PPP */
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u_int pp_ncpflags; /* enable or disable each NCP */
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u_int pp_framebytes; /* number of bytes added by (hardware) framing */
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u_int pp_alivecnt; /* keepalive packets counter */
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u_int pp_alive_interval; /* keepalive interval */
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u_int pp_loopcnt; /* loopback detection counter */
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u_int pp_maxalive; /* number or echo req. w/o reply */
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uint64_t pp_saved_mtu; /* saved MTU value */
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time_t pp_last_receive; /* peer's last "sign of life" */
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time_t pp_max_noreceive; /* seconds since last receive before
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we start to worry and send echo
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requests */
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time_t pp_last_activity; /* second of last payload data s/r */
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time_t pp_idle_timeout; /* idle seconds before auto-disconnect,
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* 0 = disabled */
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int pp_auth_failures; /* authorization failures */
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int pp_max_auth_fail; /* max. allowed authorization failures */
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int pp_phase; /* phase we're currently in */
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krwlock_t pp_lock; /* lock for sppp structure */
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int query_dns; /* 1 if we want to know the dns addresses */
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uint32_t dns_addrs[2];
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#if defined(__FreeBSD__) && __FreeBSD__ >= 3
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struct callout_handle ch[IDX_COUNT]; /* per-proto and if callouts */
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struct callout_handle pap_my_to_ch; /* PAP needs one more... */
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#endif
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struct workqueue *wq_cp;
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struct sppp_work work_ifdown;
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struct sppp_cp scp[IDX_COUNT];
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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 schap chap; /* CHAP 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 *);
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void (*pp_down)(struct sppp *);
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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 *);
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void (*pp_tlf)(struct sppp *);
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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 *);
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void (*pp_chg)(struct sppp *, int);
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};
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#define PP_KEEPALIVE 0x01 /* use keepalive protocol */
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/* 0x02 was PP_CISCO */
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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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#define PP_NOFRAMING 0x20 /* do not add/expect encapsulation
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around PPP frames (i.e. the serial
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HDLC like encapsulation, RFC1662) */
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#define PP_LOOPBACK 0x40 /* in line loopback mode */
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#define PP_LOOPBACK_IFDOWN 0x80 /* if_down() when loopback detected */
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#define PP_KEEPALIVE_IFDOWN 0x100 /* if_down() when no ECHO_REPLY received */
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#define PP_ADMIN_UP 0x200 /* the interface is up */
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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 *);
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void sppp_detach (struct ifnet *);
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void sppp_input (struct ifnet *, struct mbuf *);
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int sppp_ioctl(struct ifnet *, u_long, void *);
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struct mbuf *sppp_dequeue (struct ifnet *);
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int sppp_isempty (struct ifnet *);
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void sppp_flush (struct ifnet *);
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#endif
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/*
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* Locking notes:
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* + spppq is protected by spppq_lock (an adaptive mutex)
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* spppq is a list of all struct sppps, and it is used for
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* sending keepalive packets.
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* + struct sppp is protected by sppp->pp_lock (an rwlock)
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* sppp holds configuration parameters for line,
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* authentication and addresses. It also has pointers
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* of functions to notify events to lower layer.
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* When notify events, sppp->pp_lock must be released.
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* Because the event handler implemented in a lower
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* layer often call functions implemented in
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* if_spppsubr.c.
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*
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* Locking order:
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* - IFNET_LOCK => spppq_lock => struct sppp->pp_lock
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*
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* NOTICE
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* - Lower layers must not acquire sppp->pp_lock
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*/
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#endif /* !_NET_IF_SPPPVAR_H_ */
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