2 * lcp.h - Link Control Protocol definitions.
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42 * $Id: lcp.h,v 1.19 2002/12/04 23:03:32 paulus Exp $
48 #define CI_MRU 1 /* Maximum Receive Unit */
49 #define CI_ASYNCMAP 2 /* Async Control Character Map */
50 #define CI_AUTHTYPE 3 /* Authentication Type */
51 #define CI_QUALITY 4 /* Quality Protocol */
52 #define CI_MAGICNUMBER 5 /* Magic Number */
53 #define CI_PCOMPRESSION 7 /* Protocol Field Compression */
54 #define CI_ACCOMPRESSION 8 /* Address/Control Field Compression */
55 #define CI_CALLBACK 13 /* callback */
56 #define CI_MRRU 17 /* max reconstructed receive unit; multilink */
57 #define CI_SSNHF 18 /* short sequence numbers for multilink */
58 #define CI_EPDISC 19 /* endpoint discriminator */
61 * LCP-specific packet types.
63 #define PROTREJ 8 /* Protocol Reject */
64 #define ECHOREQ 9 /* Echo Request */
65 #define ECHOREP 10 /* Echo Reply */
66 #define DISCREQ 11 /* Discard Request */
67 #define CBCP_OPT 6 /* Use callback control protocol */
70 * The state of options is described by an lcp_options structure.
72 typedef struct lcp_options {
73 bool passive; /* Don't die if we don't get a response */
74 bool silent; /* Wait for the other end to start first */
75 bool restart; /* Restart vs. exit after close */
76 bool neg_mru; /* Negotiate the MRU? */
77 bool neg_asyncmap; /* Negotiate the async map? */
78 bool neg_upap; /* Ask for UPAP authentication? */
79 bool neg_chap; /* Ask for CHAP authentication? */
80 bool neg_eap; /* Ask for EAP authentication? */
81 bool neg_magicnumber; /* Ask for magic number? */
82 bool neg_pcompression; /* HDLC Protocol Field Compression? */
83 bool neg_accompression; /* HDLC Address/Control Field Compression? */
84 bool neg_lqr; /* Negotiate use of Link Quality Reports */
85 bool neg_cbcp; /* Negotiate use of CBCP */
86 bool neg_mrru; /* negotiate multilink MRRU */
87 bool neg_ssnhf; /* negotiate short sequence numbers */
88 bool neg_endpoint; /* negotiate endpoint discriminator */
89 int mru; /* Value of MRU */
90 int mrru; /* Value of MRRU, and multilink enable */
91 u_char chap_mdtype; /* which MD types (hashing algorithm) */
92 u_int32_t asyncmap; /* Value of async map */
93 u_int32_t magicnumber;
94 int numloops; /* Number of loops during magic number neg. */
95 u_int32_t lqr_period; /* Reporting period for LQR 1/100ths second */
96 struct epdisc endpoint; /* endpoint discriminator */
100 extern lcp_options lcp_wantoptions[];
101 extern lcp_options lcp_gotoptions[];
102 extern lcp_options lcp_allowoptions[];
103 extern lcp_options lcp_hisoptions[];
105 #define DEFMRU 1500 /* Try for this */
106 #define MINMRU 128 /* No MRUs below this */
107 #define MAXMRU 16384 /* Normally limit MRU to this */
109 void lcp_open __P((int));
110 void lcp_close __P((int, char *));
111 void lcp_lowerup __P((int));
112 void lcp_lowerdown __P((int));
113 void lcp_sprotrej __P((int, u_char *, int)); /* send protocol reject */
115 extern struct protent lcp_protent;
117 /* Default number of times we receive our magic number from the peer
118 before deciding the link is looped-back. */
119 #define DEFLOOPBACKFAIL 10