1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 struct mbuf; 30 struct physical; 31 struct bundle; 32 struct cmdargs; 33 struct 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 51 struct enddisc { 52 u_char class; 53 char address[50]; 54 int len; 55 }; 56 57 struct peerid { 58 struct enddisc enddisc; /* Peers endpoint discriminator */ 59 char authname[AUTHLEN]; /* Peers name (authenticated) */ 60 }; 61 62 struct 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 72 struct 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 }; 111 112 struct mp_link { 113 u_int32_t seq; /* 12 or 24 bit incoming seq */ 114 unsigned bandwidth; /* Our link bandwidth (or zero) */ 115 }; 116 117 struct 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) 126 127 extern void peerid_Init(struct peerid *); 128 extern int peerid_Equal(const struct peerid *, const struct peerid *); 129 extern void mpserver_Init(struct mpserver *); 130 extern int mpserver_Open(struct mpserver *, struct peerid *); 131 extern void mpserver_Close(struct mpserver *); 132 extern void mp_Init(struct mp *, struct bundle *); 133 extern void mp_linkInit(struct mp_link *); 134 extern int mp_Up(struct mp *, struct datalink *); 135 extern void mp_Down(struct mp *); 136 extern struct mbuf *mp_Input(struct bundle *, struct link *, struct mbuf *); 137 extern int mp_FillPhysicalQueues(struct bundle *); 138 extern int mp_SetDatalinkBandwidth(struct cmdargs const *); 139 extern int mp_ShowStatus(struct cmdargs const *); 140 extern const char *mp_Enddisc(u_char, const char *, size_t); 141 extern int mp_SetEnddisc(struct cmdargs const *); 142 extern void mp_LinkLost(struct mp *, struct datalink *); 143 extern void mp_RestartAutoloadTimer(struct mp *); 144 extern void mp_CheckAutoloadTimer(struct mp *); 145 extern void mp_StopAutoloadTimer(struct mp *); 146 extern size_t mp_QueueLen(struct mp *); 147