1 /* $NetBSD: lcp.h,v 1.5 2021/01/09 16:39:28 christos Exp $ */ 2 3 /* 4 * lcp.h - Link Control Protocol definitions. 5 * 6 * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * 3. The name "Carnegie Mellon University" must not be used to 21 * endorse or promote products derived from this software without 22 * prior written permission. For permission or any legal 23 * details, please contact 24 * Office of Technology Transfer 25 * Carnegie Mellon University 26 * 5000 Forbes Avenue 27 * Pittsburgh, PA 15213-3890 28 * (412) 268-4387, fax: (412) 268-7395 29 * tech-transfer@andrew.cmu.edu 30 * 31 * 4. Redistributions of any form whatsoever must retain the following 32 * acknowledgment: 33 * "This product includes software developed by Computing Services 34 * at Carnegie Mellon University (http://www.cmu.edu/computing/)." 35 * 36 * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO 37 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 38 * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE 39 * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 40 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN 41 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 42 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 43 */ 44 45 /* 46 * Options. 47 */ 48 #define CI_VENDOR 0 /* Vendor Specific */ 49 #define CI_MRU 1 /* Maximum Receive Unit */ 50 #define CI_ASYNCMAP 2 /* Async Control Character Map */ 51 #define CI_AUTHTYPE 3 /* Authentication Type */ 52 #define CI_QUALITY 4 /* Quality Protocol */ 53 #define CI_MAGICNUMBER 5 /* Magic Number */ 54 #define CI_PCOMPRESSION 7 /* Protocol Field Compression */ 55 #define CI_ACCOMPRESSION 8 /* Address/Control Field Compression */ 56 #define CI_FCSALTERN 9 /* FCS-Alternatives */ 57 #define CI_SDP 10 /* Self-Describing-Pad */ 58 #define CI_NUMBERED 11 /* Numbered-Mode */ 59 #define CI_CALLBACK 13 /* callback */ 60 #define CI_MRRU 17 /* max reconstructed receive unit; multilink */ 61 #define CI_SSNHF 18 /* short sequence numbers for multilink */ 62 #define CI_EPDISC 19 /* endpoint discriminator */ 63 #define CI_MPPLUS 22 /* Multi-Link-Plus-Procedure */ 64 #define CI_LDISC 23 /* Link-Discriminator */ 65 #define CI_LCPAUTH 24 /* LCP Authentication */ 66 #define CI_COBS 25 /* Consistent Overhead Byte Stuffing */ 67 #define CI_PREFELIS 26 /* Prefix Elision */ 68 #define CI_MPHDRFMT 27 /* MP Header Format */ 69 #define CI_I18N 28 /* Internationalization */ 70 #define CI_SDL 29 /* Simple Data Link */ 71 72 /* 73 * LCP-specific packet types (code numbers). 74 */ 75 #define PROTREJ 8 /* Protocol Reject */ 76 #define ECHOREQ 9 /* Echo Request */ 77 #define ECHOREP 10 /* Echo Reply */ 78 #define DISCREQ 11 /* Discard Request */ 79 #define IDENTIF 12 /* Identification */ 80 #define TIMEREM 13 /* Time Remaining */ 81 82 /* Value used as data for CI_CALLBACK option */ 83 #define CBCP_OPT 6 /* Use callback control protocol */ 84 85 /* 86 * The state of options is described by an lcp_options structure. 87 */ 88 typedef struct lcp_options { 89 bool passive; /* Don't die if we don't get a response */ 90 bool silent; /* Wait for the other end to start first */ 91 bool restart; /* Restart vs. exit after close */ 92 bool neg_mru; /* Negotiate the MRU? */ 93 bool neg_asyncmap; /* Negotiate the async map? */ 94 bool neg_upap; /* Ask for UPAP authentication? */ 95 bool neg_chap; /* Ask for CHAP authentication? */ 96 bool neg_eap; /* Ask for EAP authentication? */ 97 bool neg_magicnumber; /* Ask for magic number? */ 98 bool neg_pcompression; /* HDLC Protocol Field Compression? */ 99 bool neg_accompression; /* HDLC Address/Control Field Compression? */ 100 bool neg_lqr; /* Negotiate use of Link Quality Reports */ 101 bool neg_cbcp; /* Negotiate use of CBCP */ 102 bool neg_mrru; /* negotiate multilink MRRU */ 103 bool neg_ssnhf; /* negotiate short sequence numbers */ 104 bool neg_endpoint; /* negotiate endpoint discriminator */ 105 int mru; /* Value of MRU */ 106 int mrru; /* Value of MRRU, and multilink enable */ 107 u_char chap_mdtype; /* which MD types (hashing algorithm) */ 108 u_int32_t asyncmap; /* Value of async map */ 109 u_int32_t magicnumber; 110 int numloops; /* Number of loops during magic number neg. */ 111 u_int32_t lqr_period; /* Reporting period for LQR 1/100ths second */ 112 struct epdisc endpoint; /* endpoint discriminator */ 113 } lcp_options; 114 115 extern fsm lcp_fsm[]; 116 extern lcp_options lcp_wantoptions[]; 117 extern lcp_options lcp_gotoptions[]; 118 extern lcp_options lcp_allowoptions[]; 119 extern lcp_options lcp_hisoptions[]; 120 121 #define DEFMRU 1500 /* Try for this */ 122 #define MINMRU 128 /* No MRUs below this */ 123 #define MAXMRU 16384 /* Normally limit MRU to this */ 124 125 void lcp_open(int); 126 void lcp_close(int, char *); 127 void lcp_lowerup(int); 128 void lcp_lowerdown(int); 129 void lcp_sprotrej(int, u_char *, int); /* send protocol reject */ 130 131 extern struct protent lcp_protent; 132 133 /* Default number of times we receive our magic number from the peer 134 before deciding the link is looped-back. */ 135 #define DEFLOOPBACKFAIL 10 136