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/* $OpenBSD: if_sppp.h,v 1.30 2021/11/17 18:00:24 bket Exp $ */
/* $NetBSD: if_sppp.h,v 1.2.2.1 1999/04/04 06:57:39 explorer Exp $ */
/*
* Defines for synchronous PPP 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.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* From: Version 2.0, Fri Oct 6 20:39:21 MSK 1995
*
* From: if_sppp.h,v 1.8 1997/10/11 11:25:20 joerg Exp
*
* From: Id: if_sppp.h,v 1.7 1998/12/01 20:20:19 hm Exp
*/
#ifndef _NET_IF_SPPP_H_
#define _NET_IF_SPPP_H_
#define AUTHFLAG_NOCALLOUT 1 /* don't require authentication on callouts */
#define AUTHFLAG_NORECHALLENGE 2 /* don't re-challenge CHAP */
/*
* Don't change the order of this. Ordering the phases this way allows
* for a comparison 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 AUTHMAXLEN 256 /* including terminating '\0' */
#define AUTHCHALEN 16 /* length of the challenge we send */
/*
* 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 SPPPIOSDEFS,
* modify the defs field as desired, and pass the struct ifreq now
* to a SIOCSIFGENERIC ioctl.
*/
struct sauthreq {
int cmd;
u_short proto; /* authentication protocol to use */
u_short flags;
u_char name[AUTHMAXLEN]; /* system identification name */
u_char secret[AUTHMAXLEN]; /* secret password */
};
struct spppreq {
int cmd;
enum ppp_phase phase; /* phase we're currently in */
};
#include <netinet/in.h>
#define IPCP_MAX_DNSSRV 2
struct sdnsreq {
int cmd;
struct in_addr dns[IPCP_MAX_DNSSRV];
};
#define SPPPIOGDEFS ((int)(('S' << 24) + (1 << 16) + sizeof(struct spppreq)))
#define SPPPIOSDEFS ((int)(('S' << 24) + (2 << 16) + sizeof(struct spppreq)))
#define SPPPIOGMAUTH ((int)(('S' << 24) + (3 << 16) + sizeof(struct sauthreq)))
#define SPPPIOSMAUTH ((int)(('S' << 24) + (4 << 16) + sizeof(struct sauthreq)))
#define SPPPIOGHAUTH ((int)(('S' << 24) + (5 << 16) + sizeof(struct sauthreq)))
#define SPPPIOSHAUTH ((int)(('S' << 24) + (6 << 16) + sizeof(struct sauthreq)))
#define SPPPIOGDNS ((int)(('S' << 24) + (7 << 16) + sizeof(struct sdnsreq)))
#ifdef _KERNEL
#include <sys/timeout.h>
#include <sys/task.h>
#ifdef INET6
#include <netinet6/in6_var.h>
#endif
#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; /* seconds */
int max_terminate;
int max_configure;
int max_failure;
};
#define IDX_IPCP 1 /* idx into state table */
#define IDX_IPV6CP 2
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 my address already */
#define IPCP_HISADDR_DYN 8 /* his address is dynamically assigned */
#define IPV6CP_MYIFID_DYN 1 /* my ifid is dynamically assigned */
#define IPV6CP_MYIFID_SEEN 2 /* have seen my suggested ifid */
u_int32_t saved_hisaddr; /* if hisaddr (IPv4) is dynamic, save
* original one here, in network byte order */
u_int32_t req_hisaddr; /* remote address requested (IPv4) */
u_int32_t req_myaddr; /* local address requested (IPv4) */
struct in_addr dns[IPCP_MAX_DNSSRV]; /* IPv4 DNS servers (RFC 1877) */
#ifdef INET6
struct in6_aliasreq req_ifid; /* local ifid requested (IPv6) */
#endif
struct task set_addr_task; /* set address from process context */
struct task clear_addr_task; /* clear address from process context */
};
struct sauth {
u_short proto; /* authentication protocol to use */
u_short flags;
u_char *name; /* system identification name */
u_char *secret; /* secret password */
};
#define IDX_PAP 3
#define IDX_CHAP 4
#define IDX_COUNT (IDX_CHAP + 1) /* bump this when adding cp's! */
struct sppp {
/* NB: pp_if _must_ be first */
struct ifnet pp_if; /* network interface data */
struct mbuf_queue pp_cpq; /* PPP control protocol queue */
struct sppp *pp_next; /* next interface in keepalive list */
u_int pp_flags;
u_int pp_framebytes; /* number of bytes added by hardware framing */
u_short pp_alivecnt; /* keepalive packets counter */
u_short pp_loopcnt; /* loopback detection counter */
u_int32_t pp_seq; /* local sequence number */
u_int32_t pp_rseq; /* remote sequence number */
time_t pp_last_receive; /* peer's last "sign of life" */
time_t pp_last_activity; /* second of last payload data s/r */
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 timeout ch[IDX_COUNT];
struct timeout pap_my_to_ch;
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 */
u_char chap_challenge[AUTHCHALEN]; /* random challenge used by CHAP */
/*
* 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);
};
#define PP_KEEPALIVE 0x01 /* use keepalive protocol */
/* 0x02 was PP_CISCO */
/* 0x04 was PP_TIMO */
#define PP_CALLIN 0x08 /* we are being called */
#define PP_NEEDAUTH 0x10 /* remote requested authentication */
#define PP_NOFRAMING 0x20 /* do not add/expect encapsulation
around PPP frames (i.e. the serial
HDLC like encapsulation, RFC1662) */
#define PP_MIN_MRU IP_MSS /* minimal MRU */
#define PP_MTU 1500 /* default MTU */
#define PP_MAX_MRU 2048 /* maximal MRU we want to negotiate */
void sppp_attach (struct ifnet *ifp);
void sppp_detach (struct ifnet *ifp);
void sppp_input (struct ifnet *ifp, struct mbuf *m);
/* Workaround */
void spppattach (struct ifnet *ifp);
int sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data);
struct mbuf *sppp_dequeue (struct ifnet *ifp);
int sppp_isempty (struct ifnet *ifp);
void sppp_flush (struct ifnet *ifp);
#endif /* _KERNEL */
#endif /* _NET_IF_SPPP_H_ */
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