1/*-
2 * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29struct mbuf;
30struct physical;
31struct bundle;
32struct cmdargs;
33struct datalink;
34
35#define ENDDISC_NULL	0
36#define ENDDISC_LOCAL	1
37#define ENDDISC_IP	2
38#define ENDDISC_MAC	3
39#define ENDDISC_MAGIC	4
40#define ENDDISC_PSN	5
41
42#define MP_LINKSENT	0	/* We attached the link to another ppp */
43#define MP_UP		1	/* We've started MP */
44#define MP_ADDED	2	/* We've added the link to our MP */
45#define MP_FAILED	3	/* No go */
46
47#define MPSERVER_CONNECTED	0
48#define MPSERVER_LISTENING	1
49#define MPSERVER_FAILED		2
50
51struct enddisc {
52  u_char class;
53  char address[50];
54  int len;
55};
56
57struct peerid {
58  struct enddisc enddisc;	/* Peers endpoint discriminator */
59  char authname[AUTHLEN];	/* Peers name (authenticated) */
60};
61
62struct mpserver {
63  struct fdescriptor desc;
64  int fd;			/* listen()ing or connect()ing here */
65  struct sockaddr_un socket;	/* On this socket */
66
67  struct {
68    struct datalink *dl;	/* Send this datalink */
69  } send;			/* (in UpdateSet()) */
70};
71
72struct mp {
73  struct link link;
74
75  unsigned active : 1;
76  unsigned peer_is12bit : 1;	/* 12/24bit seq nos */
77  unsigned local_is12bit : 1;
78  u_short peer_mrru;
79  u_short local_mrru;
80
81  struct peerid peer;		/* Who are we talking to */
82  struct mpserver server;	/* Our ``sharing'' socket */
83
84  struct {
85    u_int32_t seq;		/* next outgoing seq */
86    int link;			/* Next link to send on */
87    int af;			/* Next address family to send */
88  } out;
89
90  struct {
91    u_int32_t min_in;		/* minimum received incoming seq */
92    u_int32_t next_in;		/* next incoming seq to process */
93  } seq;
94
95  struct {
96    u_short mrru;		/* Max Reconstructed Receive Unit */
97    unsigned shortseq : 2;	/* I want short Sequence Numbers */
98    unsigned negenddisc : 2;	/* I want an endpoint discriminator */
99    struct enddisc enddisc;	/* endpoint discriminator */
100    struct {
101      int min;			/* Lowest percent of bundle->bandwidth */
102      int max;			/* Highest percent of bundle->bandwidth out */
103      int period;		/* link->throughput sample period */
104    } autoload;
105  } cfg;
106
107  struct mbuf *inbufs;		/* Received fragments */
108  struct fsm_parent fsmp;	/* Our callback functions */
109  struct bundle *bundle;	/* Parent */
110};
111
112struct mp_link {
113  u_int32_t seq;		/* 12 or 24 bit incoming seq */
114  unsigned bandwidth;		/* Our link bandwidth (or zero) */
115};
116
117struct mp_header {
118  unsigned begin : 1;
119  unsigned end : 1;
120  u_int32_t seq;
121};
122
123#define descriptor2mpserver(d) \
124  ((d)->type == MPSERVER_DESCRIPTOR ? (struct mpserver *)(d) : NULL)
125#define mpserver_IsOpen(s) ((s)->fd != -1)
126
127extern void peerid_Init(struct peerid *);
128extern int peerid_Equal(const struct peerid *, const struct peerid *);
129extern void mpserver_Init(struct mpserver *);
130extern int mpserver_Open(struct mpserver *, struct peerid *);
131extern void mpserver_Close(struct mpserver *);
132extern void mp_Init(struct mp *, struct bundle *);
133extern void mp_linkInit(struct mp_link *);
134extern int mp_Up(struct mp *, struct datalink *);
135extern void mp_Down(struct mp *);
136extern struct mbuf *mp_Input(struct bundle *, struct link *, struct mbuf *);
137extern int mp_FillPhysicalQueues(struct bundle *);
138extern int mp_SetDatalinkBandwidth(struct cmdargs const *);
139extern int mp_ShowStatus(struct cmdargs const *);
140extern const char *mp_Enddisc(u_char, const char *, size_t);
141extern int mp_SetEnddisc(struct cmdargs const *);
142extern void mp_LinkLost(struct mp *, struct datalink *);
143extern void mp_RestartAutoloadTimer(struct mp *);
144extern void mp_CheckAutoloadTimer(struct mp *);
145extern void mp_StopAutoloadTimer(struct mp *);
146extern size_t mp_QueueLen(struct mp *);
147