86b1f0d762
incoming fragments when a link goes down. o Don't use the minimum sequence numbers of links that aren't open. o Understand sequence number wrapping when determining the minimum sequence number. o Add & adjust a few comments.
136 lines
4.3 KiB
C
136 lines
4.3 KiB
C
/*-
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* Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: mp.h,v 1.2 1998/05/21 21:47:08 brian Exp $
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*/
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struct mbuf;
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struct physical;
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struct bundle;
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struct cmdargs;
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struct datalink;
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#define ENDDISC_NULL 0
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#define ENDDISC_LOCAL 1
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#define ENDDISC_IP 2
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#define ENDDISC_MAC 3
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#define ENDDISC_MAGIC 4
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#define ENDDISC_PSN 5
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#define MP_LINKSENT 0 /* We attached the link to another ppp */
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#define MP_UP 1 /* We've started MP */
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#define MP_ADDED 2 /* We've added the link to our MP */
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#define MP_FAILED 3 /* No go */
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#define MPSERVER_CONNECTED 0
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#define MPSERVER_LISTENING 1
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#define MPSERVER_FAILED 2
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struct enddisc {
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u_char class;
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char address[50];
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int len;
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};
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struct peerid {
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struct enddisc enddisc; /* Peers endpoint discriminator */
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char authname[50]; /* Peers name (authenticated) */
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};
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struct mpserver {
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struct descriptor desc;
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int fd; /* listen()ing or connect()ing here */
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struct sockaddr_un socket; /* On this socket */
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struct {
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struct datalink *dl; /* Send this datalink */
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} send; /* (in UpdateSet()) */
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};
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struct mp {
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struct link link;
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unsigned active : 1;
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unsigned peer_is12bit : 1; /* 12/24bit seq nos */
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unsigned local_is12bit : 1;
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u_short peer_mrru;
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u_short local_mrru;
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struct peerid peer; /* Who are we talking to */
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struct mpserver server; /* Our ``sharing'' socket */
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struct {
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u_int32_t seq; /* next outgoing seq */
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int link; /* Next link to send on */
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} out;
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struct {
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u_int32_t min_in; /* minimum received incoming seq */
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u_int32_t next_in; /* next incoming seq to process */
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} seq;
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struct {
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u_short mrru; /* Max Reconstructed Receive Unit */
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unsigned shortseq : 2; /* I want short Sequence Numbers */
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struct enddisc enddisc; /* endpoint discriminator */
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} cfg;
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struct mbuf *inbufs; /* Received fragments */
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struct fsm_parent fsmp; /* Our callback functions */
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struct bundle *bundle; /* Parent */
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};
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struct mp_link {
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u_int32_t seq; /* 12 or 24 bit incoming seq */
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int weight; /* bytes to send with each write */
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};
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struct mp_header {
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unsigned begin : 1;
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unsigned end : 1;
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u_int32_t seq;
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};
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#define descriptor2mpserver(d) \
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((d)->type == MPSERVER_DESCRIPTOR ? (struct mpserver *)(d) : NULL)
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#define mpserver_IsOpen(s) ((s)->fd != -1)
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extern void peerid_Init(struct peerid *);
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extern int peerid_Equal(const struct peerid *, const struct peerid *);
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extern void mpserver_Init(struct mpserver *);
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extern int mpserver_Open(struct mpserver *, struct peerid *);
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extern void mpserver_Close(struct mpserver *);
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extern void mp_Init(struct mp *, struct bundle *);
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extern void mp_linkInit(struct mp_link *);
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extern int mp_Up(struct mp *, struct datalink *);
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extern void mp_Down(struct mp *);
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extern void mp_Input(struct mp *, struct mbuf *, struct physical *);
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extern int mp_FillQueues(struct bundle *);
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extern int mp_SetDatalinkWeight(struct cmdargs const *);
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extern int mp_ShowStatus(struct cmdargs const *);
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extern const char *mp_Enddisc(u_char, const char *, int);
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extern int mp_SetEnddisc(struct cmdargs const *);
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extern void mp_LinkLost(struct mp *, struct datalink *);
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