1 | /* |
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2 | * lcp.h - Link Control Protocol definitions. |
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3 | * |
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4 | * Copyright (c) 1989 Carnegie Mellon University. |
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5 | * All rights reserved. |
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6 | * |
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7 | * Redistribution and use in source and binary forms are permitted |
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8 | * provided that the above copyright notice and this paragraph are |
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9 | * duplicated in all such forms and that any documentation, |
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10 | * advertising materials, and other materials related to such |
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11 | * distribution and use acknowledge that the software was developed |
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12 | * by Carnegie Mellon University. The name of the |
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13 | * University may not be used to endorse or promote products derived |
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14 | * from this software without specific prior written permission. |
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15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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17 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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18 | * |
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19 | * $Id$ |
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20 | */ |
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21 | |
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22 | /* |
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23 | * Options. |
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24 | */ |
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25 | #define CI_MRU 1 /* Maximum Receive Unit */ |
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26 | #define CI_ASYNCMAP 2 /* Async Control Character Map */ |
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27 | #define CI_AUTHTYPE 3 /* Authentication Type */ |
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28 | #define CI_QUALITY 4 /* Quality Protocol */ |
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29 | #define CI_MAGICNUMBER 5 /* Magic Number */ |
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30 | #define CI_PCOMPRESSION 7 /* Protocol Field Compression */ |
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31 | #define CI_ACCOMPRESSION 8 /* Address/Control Field Compression */ |
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32 | #define CI_CALLBACK 13 /* callback */ |
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33 | |
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34 | /* |
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35 | * LCP-specific packet types. |
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36 | */ |
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37 | #define PROTREJ 8 /* Protocol Reject */ |
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38 | #define ECHOREQ 9 /* Echo Request */ |
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39 | #define ECHOREP 10 /* Echo Reply */ |
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40 | #define DISCREQ 11 /* Discard Request */ |
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41 | #define CBCP_OPT 6 /* Use callback control protocol */ |
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42 | |
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43 | /* |
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44 | * The state of options is described by an lcp_options structure. |
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45 | */ |
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46 | typedef struct lcp_options { |
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47 | bool passive; /* Don't die if we don't get a response */ |
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48 | bool silent; /* Wait for the other end to start first */ |
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49 | bool restart; /* Restart vs. exit after close */ |
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50 | bool neg_mru; /* Negotiate the MRU? */ |
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51 | bool neg_asyncmap; /* Negotiate the async map? */ |
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52 | bool neg_upap; /* Ask for UPAP authentication? */ |
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53 | bool neg_chap; /* Ask for CHAP authentication? */ |
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54 | bool neg_magicnumber; /* Ask for magic number? */ |
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55 | bool neg_pcompression; /* HDLC Protocol Field Compression? */ |
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56 | bool neg_accompression; /* HDLC Address/Control Field Compression? */ |
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57 | bool neg_lqr; /* Negotiate use of Link Quality Reports */ |
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58 | bool neg_cbcp; /* Negotiate use of CBCP */ |
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59 | int mru; /* Value of MRU */ |
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60 | u_char chap_mdtype; /* which MD type (hashing algorithm) */ |
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61 | u_int32_t asyncmap; /* Value of async map */ |
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62 | u_int32_t magicnumber; |
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63 | int numloops; /* Number of loops during magic number neg. */ |
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64 | u_int32_t lqr_period; /* Reporting period for LQR 1/100ths second */ |
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65 | } lcp_options; |
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66 | |
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67 | extern fsm lcp_fsm[]; |
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68 | extern lcp_options lcp_wantoptions[]; |
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69 | extern lcp_options lcp_gotoptions[]; |
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70 | extern lcp_options lcp_allowoptions[]; |
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71 | extern lcp_options lcp_hisoptions[]; |
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72 | extern u_int32_t xmit_accm[][8]; |
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73 | |
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74 | #define DEFMRU 1500 /* Try for this */ |
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75 | #define MINMRU 128 /* No MRUs below this */ |
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76 | #define MAXMRU 16384 /* Normally limit MRU to this */ |
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77 | |
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78 | void lcp_open __P((int)); |
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79 | void lcp_close __P((int, char *)); |
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80 | void lcp_lowerup __P((int)); |
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81 | void lcp_lowerdown __P((int)); |
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82 | void lcp_sprotrej __P((int, u_char *, int)); /* send protocol reject */ |
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83 | |
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84 | extern struct protent lcp_protent; |
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85 | |
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86 | /* Default number of times we receive our magic number from the peer |
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87 | before deciding the link is looped-back. */ |
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88 | #define DEFLOOPBACKFAIL 10 |
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