| 1 | /* |
| 2 | * if_ppp.h - Point-to-Point Protocol definitions. |
| 3 | * |
| 4 | * Copyright (c) 1989 Carnegie Mellon University. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms are permitted |
| 8 | * provided that the above copyright notice and this paragraph are |
| 9 | * duplicated in all such forms and that any documentation, |
| 10 | * advertising materials, and other materials related to such |
| 11 | * distribution and use acknowledge that the software was developed |
| 12 | * by Carnegie Mellon University. The name of the |
| 13 | * University may not be used to endorse or promote products derived |
| 14 | * from this software without specific prior written permission. |
| 15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| 16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| 17 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 18 | * |
| 19 | * Modified by Paul Mackerras (paulus@cs.anu.edu.au) |
| 20 | * Added PPP_MRU, sc_outm, sc_fastq, sc_bpf. |
| 21 | * |
| 22 | * $Id: if_ppp.h,v 1.2 1993/08/31 05:40:38 rgrimes Exp $ |
| 23 | * From: if_ppp.h,v 1.4 1993/08/29 11:22:37 paulus Exp $ |
| 24 | */ |
| 25 | |
| 26 | #ifndef _NET_IF_PPP_H_ |
| 27 | #define _NET_IF_PPP_H_ 1 |
| 28 | |
| 29 | /* |
| 30 | * Standard PPP header. |
| 31 | */ |
| 32 | struct ppp_header { |
| 33 | u_char ph_address; /* Address Field */ |
| 34 | u_char ph_control; /* Control Field */ |
| 35 | u_short ph_protocol; /* Protocol Field */ |
| 36 | }; |
| 37 | |
| 38 | #define PPP_HEADER_LEN 4 /* octets, must == sizeof(struct ppp_header) */ |
| 39 | #define PPP_FCS_LEN 2 /* octets for FCS */ |
| 40 | |
| 41 | #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */ |
| 42 | #define PPP_UI 0x03 /* Unnumbered Information */ |
| 43 | #define PPP_FLAG 0x7e /* Flag Sequence */ |
| 44 | #define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */ |
| 45 | #define PPP_TRANS 0x20 /* Asynchronous transparency modifier */ |
| 46 | |
| 47 | /* |
| 48 | * Protocol types. |
| 49 | */ |
| 50 | #define PPP_IP 0x21 /* Internet Protocol */ |
| 51 | #define PPP_XNS 0x25 /* Xerox NS */ |
| 52 | #define PPP_VJC_COMP 0x2d /* VJ compressed TCP */ |
| 53 | #define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */ |
| 54 | #define PPP_LCP 0xc021 /* Link Control Protocol */ |
| 55 | |
| 56 | /* |
| 57 | * Important FCS values. |
| 58 | */ |
| 59 | #define PPP_INITFCS 0xffff /* Initial FCS value */ |
| 60 | #define PPP_GOODFCS 0xf0b8 /* Good final FCS value */ |
| 61 | #define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) |
| 62 | |
| 63 | #define PPP_MTU 1500 /* Default MTU (size of Info field) */ |
| 64 | #define PPP_MRU 1500 /* Default MRU (max receive unit) */ |
| 65 | #define PPP_MAXMRU 65000 /* Largest MRU we allow */ |
| 66 | #define PPP_HIWAT 400 /* Don't start a new packet if HIWAT on que */ |
| 67 | |
| 68 | struct ppp_softc { |
| 69 | struct ifnet sc_if; /* network-visible interface */ |
| 70 | u_int sc_flags; /* see below */ |
| 71 | struct tty *sc_ttyp; /* pointer to tty structure */ |
| 72 | struct mbuf *sc_outm; /* mbuf chain being output currently */ |
| 73 | struct mbuf *sc_m; /* pointer to input mbuf chain */ |
| 74 | struct mbuf *sc_mc; /* pointer to current input mbuf */ |
| 75 | char *sc_mp; /* pointer to next char in input mbuf */ |
| 76 | short sc_ilen; /* length of input-packet-so-far */ |
| 77 | u_short sc_fcs; /* FCS so far (input) */ |
| 78 | u_short sc_outfcs; /* FCS so far for output packet */ |
| 79 | short sc_mru; /* max receive unit */ |
| 80 | u_long sc_asyncmap; /* async control character map */ |
| 81 | u_long sc_rasyncmap; /* receive async control char map */ |
| 82 | struct ifqueue sc_inq; /* TTY side input queue */ |
| 83 | struct ifqueue sc_fastq; /* IP interactive output packet queue */ |
| 84 | #ifdef VJC |
| 85 | struct slcompress sc_comp; /* vjc control buffer */ |
| 86 | #endif |
| 87 | u_int sc_bytessent; |
| 88 | u_int sc_bytesrcvd; |
| 89 | caddr_t sc_bpf; |
| 90 | }; |
| 91 | |
| 92 | /* flags */ |
| 93 | #define SC_COMP_PROT 0x00000001 /* protocol compression (output) */ |
| 94 | #define SC_COMP_AC 0x00000002 /* header compression (output) */ |
| 95 | #define SC_COMP_TCP 0x00000004 /* TCP (VJ) compression (output) */ |
| 96 | #define SC_NO_TCP_CCID 0x00000008 /* disable VJ connection-id comp. */ |
| 97 | #define SC_REJ_COMP_AC 0x00000010 /* reject adrs/ctrl comp. on input */ |
| 98 | #define SC_REJ_COMP_TCP 0x00000020 /* reject TCP (VJ) comp. on input */ |
| 99 | #define SC_MASK 0x0000ffff /* bits that user can change */ |
| 100 | |
| 101 | /* state bits */ |
| 102 | #define SC_ESCAPED 0x00010000 /* saw a PPP_ESCAPE */ |
| 103 | #define SC_FLUSH 0x00020000 /* flush input until next PPP_FLAG */ |
| 104 | |
| 105 | #define t_sc T_LINEP |
| 106 | |
| 107 | /* this stuff doesn't belong here... */ |
| 108 | #define PPPIOCGFLAGS _IOR('t', 90, int) /* get configuration flags */ |
| 109 | #define PPPIOCSFLAGS _IOW('t', 89, int) /* set configuration flags */ |
| 110 | #define PPPIOCGASYNCMAP _IOR('t', 88, int) /* get async map */ |
| 111 | #define PPPIOCSASYNCMAP _IOW('t', 87, int) /* set async map */ |
| 112 | #define PPPIOCGUNIT _IOR('t', 86, int) /* get ppp unit number */ |
| 113 | #define PPPIOCGRASYNCMAP _IOR('t', 85, int) /* get receive async map */ |
| 114 | #define PPPIOCSRASYNCMAP _IOW('t', 84, int) /* set receive async map */ |
| 115 | #define PPPIOCGMRU _IOR('t', 83, int) /* get max receive unit */ |
| 116 | #define PPPIOCSMRU _IOW('t', 82, int) /* set max receive unit */ |
| 117 | |
| 118 | /* old copies of PPP may have defined this */ |
| 119 | #if !defined(ifr_mtu) |
| 120 | #define ifr_mtu ifr_metric |
| 121 | #endif |
| 122 | |
| 123 | #endif /* _NET_IF_PPP_H_ */ |