1 /* 2 * lcp.h - Link Control Protocol definitions. 3 * 4 * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 18 * 3. The name "Carnegie Mellon University" must not be used to 19 * endorse or promote products derived from this software without 20 * prior written permission. For permission or any legal 21 * details, please contact 22 * Office of Technology Transfer 23 * Carnegie Mellon University 24 * 5000 Forbes Avenue 25 * Pittsburgh, PA 15213-3890 26 * (412) 268-4387, fax: (412) 268-7395 27 * tech-transfer@andrew.cmu.edu 28 * 29 * 4. Redistributions of any form whatsoever must retain the following 30 * acknowledgment: 31 * "This product includes software developed by Computing Services 32 * at Carnegie Mellon University (http://www.cmu.edu/computing/)." 33 * 34 * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO 35 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 36 * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE 37 * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 38 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN 39 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 40 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 41 * 42 * $Id: lcp.h,v 1.19 2002/12/04 23:03:32 paulus Exp $ 43 */ 44 45 /* 46 * Options. 47 */ 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 */ 59 60 /* 61 * LCP-specific packet types. 62 */ 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 */ 68 69 /* 70 * The state of options is described by an lcp_options structure. 71 */ 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 */ 97 } lcp_options; 98 99 extern fsm lcp_fsm[]; 100 extern lcp_options lcp_wantoptions[]; 101 extern lcp_options lcp_gotoptions[]; 102 extern lcp_options lcp_allowoptions[]; 103 extern lcp_options lcp_hisoptions[]; 104 105 #define DEFMRU 1500 /* Try for this */ 106 #define MINMRU 128 /* No MRUs below this */ 107 #define MAXMRU 16384 /* Normally limit MRU to this */ 108 109 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 */ 114 115 extern struct protent lcp_protent; 116 117 /* Default number of times we receive our magic number from the peer 118 before deciding the link is looped-back. */ 119 #define DEFLOOPBACKFAIL 10 120