xref: /freebsd/usr.sbin/ppp/mp.h (revision 673903ec42f3019f33a1221bf37205d248f26f5b)

/*-
 * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
 * All rights reserved.
 *
 * 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 AUTHOR AND CONTRIBUTORS ``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 AUTHOR 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.
 *
 *	$Id: mp.h,v 1.1.2.3 1998/04/23 03:23:00 brian Exp $
 */

struct mbuf;
struct physical;
struct bundle;
struct cmdargs;

struct mp {
  struct link link;

  unsigned active : 1;
  unsigned peer_is12bit : 1;        /* 12 / 24bit seq nos */
  unsigned local_is12bit : 1;
  u_short peer_mrru;
  u_short local_mrru;

  struct {
    u_char class;
    char address[50];
    int len;
  } peer_enddisc;             /* peers endpoint discriminator */

  struct {
    u_int32_t out;            /* next outgoing seq */
    u_int32_t min_in;         /* minimum received incoming seq */
    u_int32_t next_in;        /* next incoming seq to process */
  } seq;

  struct {
    u_short mrru;             /* Max Reconstructed Receive Unit */
    unsigned shortseq : 2;    /* I want short Sequence Numbers */
    struct {
      u_char class;
      char address[50];
      int len;
    } enddisc;                /* endpoint discriminator */
  } cfg;

  struct mbuf *inbufs;        /* Received fragments */
  struct fsm_parent fsmp;     /* Our callback functions */
  struct bundle *bundle;      /* Parent */
};

struct mp_link {
  u_int32_t seq;              /* 12 or 24 bit incoming seq */
  int weight;                 /* bytes to send with each write */
};

struct mp_header {
  unsigned begin : 1;
  unsigned end : 1;
  u_int32_t seq;
};

extern void mp_Init(struct mp *, struct bundle *);
extern void mp_linkInit(struct mp_link *);
extern int mp_Up(struct mp *, u_short, u_short, int, int);
extern void mp_Down(struct mp *);
extern void mp_Input(struct mp *, struct mbuf *, struct physical *);
extern int mp_FillQueues(struct bundle *);
extern int mp_SetDatalinkWeight(struct cmdargs const *);
extern int mp_ShowStatus(struct cmdargs const *);
extern const char *mp_Enddisc(u_char, const char *, int);
extern int mp_SetEnddisc(struct cmdargs const *);