2 * lcp.h - Link Control Protocol definitions.
4 * Copyright (c) 1989 Carnegie Mellon University.
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.
19 * $Id: lcp.h,v 1.14 2000/03/27 06:03:00 paulus Exp $
25 #define CI_MRU 1 /* Maximum Receive Unit */
26 #define CI_ASYNCMAP 2 /* Async Control Character Map */
27 #define CI_AUTHTYPE 3 /* Authentication Type */
28 #define CI_QUALITY 4 /* Quality Protocol */
29 #define CI_MAGICNUMBER 5 /* Magic Number */
30 #define CI_PCOMPRESSION 7 /* Protocol Field Compression */
31 #define CI_ACCOMPRESSION 8 /* Address/Control Field Compression */
32 #define CI_CALLBACK 13 /* callback */
33 #define CI_MRRU 17 /* max reconstructed receive unit; multilink */
34 #define CI_SSNHF 18 /* short sequence numbers for multilink */
35 #define CI_EPDISC 19 /* endpoint discriminator */
38 * LCP-specific packet types.
40 #define PROTREJ 8 /* Protocol Reject */
41 #define ECHOREQ 9 /* Echo Request */
42 #define ECHOREP 10 /* Echo Reply */
43 #define DISCREQ 11 /* Discard Request */
44 #define CBCP_OPT 6 /* Use callback control protocol */
46 /* maximum length of endpoint discriminator value */
47 #define MAX_ENDP_LEN 20
50 * The state of options is described by an lcp_options structure.
52 typedef struct lcp_options {
53 bool passive; /* Don't die if we don't get a response */
54 bool silent; /* Wait for the other end to start first */
55 bool restart; /* Restart vs. exit after close */
56 bool neg_mru; /* Negotiate the MRU? */
57 bool neg_asyncmap; /* Negotiate the async map? */
58 bool neg_upap; /* Ask for UPAP authentication? */
59 bool neg_chap; /* Ask for CHAP authentication? */
60 bool neg_magicnumber; /* Ask for magic number? */
61 bool neg_pcompression; /* HDLC Protocol Field Compression? */
62 bool neg_accompression; /* HDLC Address/Control Field Compression? */
63 bool neg_lqr; /* Negotiate use of Link Quality Reports */
64 bool neg_cbcp; /* Negotiate use of CBCP */
65 bool neg_multilink; /* negotiate multilink (MRRU) */
66 bool neg_ssnhf; /* negotiate short sequence numbers */
67 bool neg_endpoint; /* negotiate endpoint discriminator */
68 int mru; /* Value of MRU */
69 int mrru; /* Value of MRRU, and multilink enable */
70 u_char chap_mdtype; /* which MD type (hashing algorithm) */
71 u_int32_t asyncmap; /* Value of async map */
72 u_int32_t magicnumber;
73 int numloops; /* Number of loops during magic number neg. */
74 u_int32_t lqr_period; /* Reporting period for LQR 1/100ths second */
75 int endp_class; /* endpoint discriminator class */
76 int endp_len; /* endpoint discriminator length */
77 u_char endpoint[MAX_ENDP_LEN]; /* endpoint discriminator value */
81 extern lcp_options lcp_wantoptions[];
82 extern lcp_options lcp_gotoptions[];
83 extern lcp_options lcp_allowoptions[];
84 extern lcp_options lcp_hisoptions[];
85 extern u_int32_t xmit_accm[][8];
87 #define DEFMRU 1500 /* Try for this */
88 #define MINMRU 128 /* No MRUs below this */
89 #define MAXMRU 16384 /* Normally limit MRU to this */
91 void lcp_open __P((int));
92 void lcp_close __P((int, char *));
93 void lcp_lowerup __P((int));
94 void lcp_lowerdown __P((int));
95 void lcp_sprotrej __P((int, u_char *, int)); /* send protocol reject */
97 extern struct protent lcp_protent;
99 /* Default number of times we receive our magic number from the peer
100 before deciding the link is looped-back. */
101 #define DEFLOOPBACKFAIL 10