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001: /*
002:  * ppp_defs.h - PPP definitions.
003:  *
004:  * Copyright (c) 1994 The Australian National University.
005:  * All rights reserved.
006:  *
007:  * Permission to use, copy, modify, and distribute this software and its
008:  * documentation is hereby granted, provided that the above copyright
009:  * notice appears in all copies.  This software is provided without any
010:  * warranty, express or implied. The Australian National University
011:  * makes no representations about the suitability of this software for
012:  * any purpose.
013:  *
014:  * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
015:  * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
016:  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
017:  * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
018:  * OF SUCH DAMAGE.
019:  *
020:  * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
021:  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
022:  * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
023:  * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
024:  * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
025:  * OR MODIFICATIONS.
026:  */
027: 
028: #include <linux/types.h>
029: 
030: /*
031:  *  ==FILEVERSION 20000114==
032:  *
033:  *  NOTE TO MAINTAINERS:
034:  *     If you modify this file at all, please set the above date.
035:  *     ppp_defs.h is shipped with a PPP distribution as well as with the kernel;
036:  *     if everyone increases the FILEVERSION number above, then scripts
037:  *     can do the right thing when deciding whether to install a new ppp_defs.h
038:  *     file.  Don't change the format of that line otherwise, so the
039:  *     installation script can recognize it.
040:  */
041: 
042: #ifndef _PPP_DEFS_H_
043: #define _PPP_DEFS_H_
044: 
045: /*
046:  * The basic PPP frame.
047:  */
048: #define PPP_HDRLEN      4       /* octets for standard ppp header */
049: #define PPP_FCSLEN      2       /* octets for FCS */
050: #define PPP_MRU         1500    /* default MRU = max length of info field */
051: 
052: #define PPP_ADDRESS(p)  (((__u8 *)(p))[0])
053: #define PPP_CONTROL(p)  (((__u8 *)(p))[1])
054: #define PPP_PROTOCOL(p) ((((__u8 *)(p))[2] << 8) + ((__u8 *)(p))[3])
055: 
056: /*
057:  * Significant octet values.
058:  */
059: #define PPP_ALLSTATIONS 0xff    /* All-Stations broadcast address */
060: #define PPP_UI          0x03    /* Unnumbered Information */
061: #define PPP_FLAG        0x7e    /* Flag Sequence */
062: #define PPP_ESCAPE      0x7d    /* Asynchronous Control Escape */
063: #define PPP_TRANS       0x20    /* Asynchronous transparency modifier */
064: 
065: /*
066:  * Protocol field values.
067:  */
068: #define PPP_IP          0x21    /* Internet Protocol */
069: #define PPP_AT          0x29    /* AppleTalk Protocol */
070: #define PPP_IPX         0x2b    /* IPX protocol */
071: #define PPP_VJC_COMP    0x2d    /* VJ compressed TCP */
072: #define PPP_VJC_UNCOMP  0x2f    /* VJ uncompressed TCP */
073: #define PPP_MP          0x3d    /* Multilink protocol */
074: #define PPP_IPV6        0x57    /* Internet Protocol Version 6 */
075: #define PPP_COMPFRAG    0xfb    /* fragment compressed below bundle */
076: #define PPP_COMP        0xfd    /* compressed packet */
077: #define PPP_MPLS_UC     0x0281  /* Multi Protocol Label Switching - Unicast */
078: #define PPP_MPLS_MC     0x0283  /* Multi Protocol Label Switching - Multicast */
079: #define PPP_IPCP        0x8021  /* IP Control Protocol */
080: #define PPP_ATCP        0x8029  /* AppleTalk Control Protocol */
081: #define PPP_IPXCP       0x802b  /* IPX Control Protocol */
082: #define PPP_IPV6CP      0x8057  /* IPv6 Control Protocol */
083: #define PPP_CCPFRAG     0x80fb  /* CCP at link level (below MP bundle) */
084: #define PPP_CCP         0x80fd  /* Compression Control Protocol */
085: #define PPP_MPLSCP      0x80fd  /* MPLS Control Protocol */
086: #define PPP_LCP         0xc021  /* Link Control Protocol */
087: #define PPP_PAP         0xc023  /* Password Authentication Protocol */
088: #define PPP_LQR         0xc025  /* Link Quality Report protocol */
089: #define PPP_CHAP        0xc223  /* Cryptographic Handshake Auth. Protocol */
090: #define PPP_CBCP        0xc029  /* Callback Control Protocol */
091: 
092: /*
093:  * Values for FCS calculations.
094:  */
095: 
096: #define PPP_INITFCS     0xffff  /* Initial FCS value */
097: #define PPP_GOODFCS     0xf0b8  /* Good final FCS value */
098: 
099: 
100: /*
101:  * Extended asyncmap - allows any character to be escaped.
102:  */
103: 
104: typedef __u32           ext_accm[8];
105: 
106: /*
107:  * What to do with network protocol (NP) packets.
108:  */
109: enum NPmode {
110:     NPMODE_PASS,                /* pass the packet through */
111:     NPMODE_DROP,                /* silently drop the packet */
112:     NPMODE_ERROR,               /* return an error */
113:     NPMODE_QUEUE                /* save it up for later. */
114: };
115: 
116: /*
117:  * Statistics for LQRP and pppstats
118:  */
119: struct pppstat  {
120:     __u32       ppp_discards;   /* # frames discarded */
121: 
122:     __u32       ppp_ibytes;     /* bytes received */
123:     __u32       ppp_ioctects;   /* bytes received not in error */
124:     __u32       ppp_ipackets;   /* packets received */
125:     __u32       ppp_ierrors;    /* receive errors */
126:     __u32       ppp_ilqrs;      /* # LQR frames received */
127: 
128:     __u32       ppp_obytes;     /* raw bytes sent */
129:     __u32       ppp_ooctects;   /* frame bytes sent */
130:     __u32       ppp_opackets;   /* packets sent */
131:     __u32       ppp_oerrors;    /* transmit errors */ 
132:     __u32       ppp_olqrs;      /* # LQR frames sent */
133: };
134: 
135: struct vjstat {
136:     __u32       vjs_packets;    /* outbound packets */
137:     __u32       vjs_compressed; /* outbound compressed packets */
138:     __u32       vjs_searches;   /* searches for connection state */
139:     __u32       vjs_misses;     /* times couldn't find conn. state */
140:     __u32       vjs_uncompressedin; /* inbound uncompressed packets */
141:     __u32       vjs_compressedin;   /* inbound compressed packets */
142:     __u32       vjs_errorin;    /* inbound unknown type packets */
143:     __u32       vjs_tossed;     /* inbound packets tossed because of error */
144: };
145: 
146: struct compstat {
147:     __u32       unc_bytes;      /* total uncompressed bytes */
148:     __u32       unc_packets;    /* total uncompressed packets */
149:     __u32       comp_bytes;     /* compressed bytes */
150:     __u32       comp_packets;   /* compressed packets */
151:     __u32       inc_bytes;      /* incompressible bytes */
152:     __u32       inc_packets;    /* incompressible packets */
153: 
154:     /* the compression ratio is defined as in_count / bytes_out */
155:     __u32       in_count;       /* Bytes received */
156:     __u32       bytes_out;      /* Bytes transmitted */
157: 
158:     double      ratio;          /* not computed in kernel. */
159: };
160: 
161: struct ppp_stats {
162:     struct pppstat      p;      /* basic PPP statistics */
163:     struct vjstat       vj;     /* VJ header compression statistics */
164: };
165: 
166: struct ppp_comp_stats {
167:     struct compstat     c;      /* packet compression statistics */
168:     struct compstat     d;      /* packet decompression statistics */
169: };
170: 
171: /*
172:  * The following structure records the time in seconds since
173:  * the last NP packet was sent or received.
174:  */
175: struct ppp_idle {
176:     __kernel_time_t xmit_idle;  /* time since last NP packet sent */
177:     __kernel_time_t recv_idle;  /* time since last NP packet received */
178: };
179: 
180: #endif /* _PPP_DEFS_H_ */
181: 

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