Watt-32 tcp/ip  2.2 dev-rel.10
ppp_defs.h
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1 
5 /* $Id: ppp_defs.h,v 1.11 1997/04/30 05:46:24 paulus Exp $ */
6 
7 /*
8  * ppp_defs.h - PPP definitions.
9  *
10  * Copyright (c) 1994 The Australian National University.
11  * All rights reserved.
12  *
13  * Permission to use, copy, modify, and distribute this software and its
14  * documentation is hereby granted, provided that the above copyright
15  * notice appears in all copies. This software is provided without any
16  * warranty, express or implied. The Australian National University
17  * makes no representations about the suitability of this software for
18  * any purpose.
19  *
20  * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
21  * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
22  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
23  * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
24  * OF SUCH DAMAGE.
25  *
26  * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
27  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
28  * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
29  * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
30  * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
31  * OR MODIFICATIONS.
32  */
33 
34 #ifndef __NET_PPP_DEFS_H
35 #define __NET_PPP_DEFS_H
36 
37 /*
38  * The basic PPP frame.
39  */
40 #define PPP_HDRLEN 4 /* octets for standard ppp header */
41 #define PPP_FCSLEN 2 /* octets for FCS */
42 
43 /*
44  * Packet sizes
45  *
46  * Note - lcp shouldn't be allowed to negotiate stuff outside these
47  * limits. See lcp.h in the pppd directory.
48  * (XXX - these constants should simply be shared by lcp.c instead
49  * of living in lcp.h)
50  */
51 #define PPP_MTU 1500 /* Default MTU (size of Info field) */
52 #define PPP_MAXMTU 65535 - (PPP_HDRLEN + PPP_FCSLEN)
53 #define PPP_MINMTU 64
54 #define PPP_MRU 1500 /* default MRU = max length of info field */
55 #define PPP_MAXMRU 65000 /* Largest MRU we allow */
56 #define PPP_MINMRU 128
57 
58 #define PPP_ADDRESS(p) (((u_char *)(p))[0])
59 #define PPP_CONTROL(p) (((u_char *)(p))[1])
60 #define PPP_PROTOCOL(p) ((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3])
61 
62 /*
63  * Significant octet values.
64  */
65 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
66 #define PPP_UI 0x03 /* Unnumbered Information */
67 #define PPP_FLAG 0x7e /* Flag Sequence */
68 #define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */
69 #define PPP_TRANS 0x20 /* Asynchronous transparency modifier */
70 
71 /*
72  * Protocol field values.
73  */
74 #define PPP_IP 0x0021 /* Raw IP */
75 #define PPP_OSI 0x0023 /* OSI Network Layer */
76 #define PPP_NS 0x0025 /* Xerox NS IDP */
77 #define PPP_DECNET 0x0027 /* DECnet Phase IV */
78 #define PPP_APPLE 0x0029 /* Appletalk */
79 #define PPP_IPX 0x002b /* Novell IPX */
80 #define PPP_VJC 0x002d /* Van Jacobson Compressed TCP/IP */
81 #define PPP_VJNC 0x002f /* Van Jacobson Uncompressed TCP/IP */
82 #define PPP_VJC_COMP PPP_VJC
83 #define PPP_VJC_UNCOMP PPP_VJNC
84 #define PPP_BRPDU 0x0031 /* Bridging PDU */
85 #define PPP_STII 0x0033 /* Stream Protocol (ST-II) */
86 #define PPP_VINES 0x0035 /* Banyan Vines */
87 #define PPP_IPV6 0x0057 /* Internet Protocol Version 6 */
88 #define PPP_COMP 0x00fd /* compressed packet */
89 
90 #define PPP_HELLO 0x0201 /* 802.1d Hello Packets */
91 #define PPP_LUXCOM 0x0231 /* Luxcom */
92 #define PPP_SNS 0x0233 /* Sigma Network Systems */
93 
94 #define PPP_IPCP 0x8021 /* IP Control Protocol */
95 #define PPP_OSICP 0x8023 /* OSI Network Layer Control Protocol */
96 #define PPP_NSCP 0x8025 /* Xerox NS IDP Control Protocol */
97 #define PPP_DECNETCP 0x8027 /* DECnet Control Protocol */
98 #define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */
99 #define PPP_IPXCP 0x802b /* IPX Control Protocol */
100 #define PPP_STIICP 0x8033 /* Strean Protocol Control Protocol */
101 #define PPP_VINESCP 0x8035 /* Banyan Vines Control Protocol */
102 #define PPP_CCP 0x80fd /* Compression Control Protocol */
103 
104 #define PPP_LCP 0xc021 /* Link Control Protocol */
105 #define PPP_PAP 0xc023 /* Password Authentication Protocol */
106 #define PPP_LQR 0xc025 /* Link Quality Report protocol */
107 #define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */
108 #define PPP_CBCP 0xc029 /* Callback Control Protocol */
109 
110 /*
111  * Values for FCS calculations.
112  */
113 #define PPP_INITFCS 0xffff /* Initial FCS value */
114 #define PPP_GOODFCS 0xf0b8 /* Good final FCS value */
115 #define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])
116 
117 /*
118  * A 32-bit unsigned integral type.
119  */
120 #if !defined(__BIT_TYPES_DEFINED__) && !defined(_BITYPES) && !defined(__SYS_WTYPES_H)
121  #ifdef UINT32_T
122  typedef UINT32_T u_int32_t;
123  #else
124  typedef unsigned long u_int32_t;
125  #endif
126 #endif
127 
128 /*
129  * Extended asyncmap - allows any character to be escaped.
130  */
131 typedef u_int32_t ext_accm[8];
132 
133 /*
134  * What to do with network protocol (NP) packets.
135  */
136 enum NPmode {
137  NPMODE_PASS, /* pass the packet through */
138  NPMODE_DROP, /* silently drop the packet */
139  NPMODE_ERROR, /* return an error */
140  NPMODE_QUEUE /* save it up for later. */
141 };
142 
143 /*
144  * Statistics.
145  */
146 struct pppstat {
147  unsigned int ppp_ibytes; /* bytes received */
148  unsigned int ppp_ipackets; /* packets received */
149  unsigned int ppp_ierrors; /* receive errors */
150  unsigned int ppp_obytes; /* bytes sent */
151  unsigned int ppp_opackets; /* packets sent */
152  unsigned int ppp_oerrors; /* transmit errors */
153 };
154 
155 struct vjstat {
156  unsigned int vjs_packets; /* outbound packets */
157  unsigned int vjs_compressed; /* outbound compressed packets */
158  unsigned int vjs_searches; /* searches for connection state */
159  unsigned int vjs_misses; /* times couldn't find conn. state */
160  unsigned int vjs_uncompressedin; /* inbound uncompressed packets */
161  unsigned int vjs_compressedin; /* inbound compressed packets */
162  unsigned int vjs_errorin; /* inbound unknown type packets */
163  unsigned int vjs_tossed; /* inbound packets tossed because of error */
164 };
165 
166 struct ppp_stats {
167  struct pppstat p; /* basic PPP statistics */
168  struct vjstat vj; /* VJ header compression statistics */
169 };
170 
171 struct compstat {
172  unsigned int unc_bytes; /* total uncompressed bytes */
173  unsigned int unc_packets; /* total uncompressed packets */
174  unsigned int comp_bytes; /* compressed bytes */
175  unsigned int comp_packets; /* compressed packets */
176  unsigned int inc_bytes; /* incompressible bytes */
177  unsigned int inc_packets; /* incompressible packets */
178  unsigned int ratio; /* recent compression ratio << 8 */
179 };
180 
182  struct compstat c; /* packet compression statistics */
183  struct compstat d; /* packet decompression statistics */
184 };
185 
186 /*
187  * The following structure records the time in seconds since
188  * the last NP packet was sent or received.
189  */
190 struct ppp_idle {
191  time_t xmit_idle; /* time since last NP packet sent */
192  time_t recv_idle; /* time since last NP packet received */
193 };
194 
195 #endif