2 * lcp.h - Link Control Protocol definitions.
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50 #define CI_VENDOR 0 /* Vendor Specific */
51 #define CI_MRU 1 /* Maximum Receive Unit */
52 #define CI_ASYNCMAP 2 /* Async Control Character Map */
53 #define CI_AUTHTYPE 3 /* Authentication Type */
54 #define CI_QUALITY 4 /* Quality Protocol */
55 #define CI_MAGICNUMBER 5 /* Magic Number */
56 #define CI_PCOMPRESSION 7 /* Protocol Field Compression */
57 #define CI_ACCOMPRESSION 8 /* Address/Control Field Compression */
58 #define CI_FCSALTERN 9 /* FCS-Alternatives */
59 #define CI_SDP 10 /* Self-Describing-Pad */
60 #define CI_NUMBERED 11 /* Numbered-Mode */
61 #define CI_CALLBACK 13 /* callback */
62 #define CI_MRRU 17 /* max reconstructed receive unit; multilink */
63 #define CI_SSNHF 18 /* short sequence numbers for multilink */
64 #define CI_EPDISC 19 /* endpoint discriminator */
65 #define CI_MPPLUS 22 /* Multi-Link-Plus-Procedure */
66 #define CI_LDISC 23 /* Link-Discriminator */
67 #define CI_LCPAUTH 24 /* LCP Authentication */
68 #define CI_COBS 25 /* Consistent Overhead Byte Stuffing */
69 #define CI_PREFELIS 26 /* Prefix Elision */
70 #define CI_MPHDRFMT 27 /* MP Header Format */
71 #define CI_I18N 28 /* Internationalization */
72 #define CI_SDL 29 /* Simple Data Link */
75 * LCP-specific packet types (code numbers).
77 #define PROTREJ 8 /* Protocol Reject */
78 #define ECHOREQ 9 /* Echo Request */
79 #define ECHOREP 10 /* Echo Reply */
80 #define DISCREQ 11 /* Discard Request */
81 #define IDENTIF 12 /* Identification */
82 #define TIMEREM 13 /* Time Remaining */
84 /* Value used as data for CI_CALLBACK option */
85 #define CBCP_OPT 6 /* Use callback control protocol */
87 /* An endpoint discriminator, used with multilink. */
88 #define MAX_ENDP_LEN 20 /* maximum length of discriminator value */
92 unsigned char value[MAX_ENDP_LEN];
96 * The state of options is described by an lcp_options structure.
98 typedef struct lcp_options {
99 bool passive; /* Don't die if we don't get a response */
100 bool silent; /* Wait for the other end to start first */
101 bool restart; /* Restart vs. exit after close */
102 bool neg_mru; /* Negotiate the MRU? */
103 bool neg_asyncmap; /* Negotiate the async map? */
104 bool neg_upap; /* Ask for UPAP authentication? */
105 bool neg_chap; /* Ask for CHAP authentication? */
106 bool neg_eap; /* Ask for EAP authentication? */
107 bool neg_magicnumber; /* Ask for magic number? */
108 bool neg_pcompression; /* HDLC Protocol Field Compression? */
109 bool neg_accompression; /* HDLC Address/Control Field Compression? */
110 bool neg_lqr; /* Negotiate use of Link Quality Reports */
111 bool neg_cbcp; /* Negotiate use of CBCP */
112 bool neg_mrru; /* negotiate multilink MRRU */
113 bool neg_ssnhf; /* negotiate short sequence numbers */
114 bool neg_endpoint; /* negotiate endpoint discriminator */
115 int mru; /* Value of MRU */
116 int mrru; /* Value of MRRU, and multilink enable */
117 unsigned char chap_mdtype; /* which MD types (hashing algorithm) */
118 uint32_t asyncmap; /* Value of async map */
119 uint32_t magicnumber;
120 int numloops; /* Number of loops during magic number neg. */
121 uint32_t lqr_period; /* Reporting period for LQR 1/100ths second */
122 struct epdisc endpoint; /* endpoint discriminator */
125 extern fsm lcp_fsm[];
126 extern lcp_options lcp_wantoptions[];
127 extern lcp_options lcp_gotoptions[];
128 extern lcp_options lcp_allowoptions[];
129 extern lcp_options lcp_hisoptions[];
131 #define DEFMRU 1500 /* Try for this */
132 #define MINMRU 128 /* No MRUs below this */
133 #define MAXMRU 16384 /* Normally limit MRU to this */
136 void lcp_close(int, char *);
137 void lcp_lowerup(int);
138 void lcp_lowerdown(int);
139 void lcp_sprotrej(int, unsigned char *, int); /* send protocol reject */
141 extern struct protent lcp_protent;
143 /* Default number of times we receive our magic number from the peer
144 before deciding the link is looped-back. */
145 #define DEFLOOPBACKFAIL 10