1 | /* |
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2 | * pppd.h - PPP daemon global declarations. |
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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 | * TODO: |
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24 | */ |
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25 | |
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26 | #ifndef __PPPD_H__ |
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27 | #define __PPPD_H__ |
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28 | |
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29 | #include <stdio.h> /* for FILE */ |
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30 | #include <sys/param.h> /* for MAXPATHLEN and BSD4_4, if defined */ |
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31 | #include <sys/types.h> /* for u_int32_t, if defined */ |
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32 | #include <sys/time.h> /* for struct timeval */ |
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33 | #include <net/ppp_defs.h> |
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34 | |
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35 | #if __STDC__ |
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36 | #include <stdarg.h> |
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37 | #define __V(x) x |
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38 | #else |
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39 | #include <varargs.h> |
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40 | #define __V(x) (va_alist) va_dcl |
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41 | #define const |
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42 | #endif |
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43 | |
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44 | /* |
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45 | * Limits. |
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46 | */ |
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47 | |
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48 | #define NUM_PPP 1 /* One PPP interface supported (per process) */ |
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49 | #define MAXWORDLEN 1024 /* max length of word in file (incl null) */ |
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50 | #define MAXARGS 1 /* max # args to a command */ |
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51 | #define MAXNAMELEN 256 /* max length of hostname or name for auth */ |
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52 | #define MAXSECRETLEN 256 /* max length of password or secret */ |
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53 | |
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54 | /* |
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55 | * Global variables. |
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56 | */ |
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57 | |
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58 | extern int hungup; /* Physical layer has disconnected */ |
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59 | extern int interfunit; /* Interface unit number */ |
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60 | extern char ifname[]; /* Interface name */ |
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61 | extern int ttyfd; /* Serial device file descriptor */ |
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62 | extern char hostname[]; /* Our hostname */ |
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63 | extern u_char outpacket_buf[]; /* Buffer for outgoing packets */ |
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64 | extern int phase; /* Current state of link - see values below */ |
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65 | extern int baud_rate; /* Current link speed in bits/sec */ |
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66 | extern char *progname; /* Name of this program */ |
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67 | extern int redirect_stderr;/* Connector's stderr should go to file */ |
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68 | extern char peer_authname[];/* Authenticated name of peer */ |
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69 | extern int privileged; /* We were run by real-uid root */ |
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70 | extern int need_holdoff; /* Need holdoff period after link terminates */ |
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71 | extern char **script_env; /* Environment variables for scripts */ |
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72 | extern int detached; /* Have detached from controlling tty */ |
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73 | |
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74 | /* |
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75 | * Variables set by command-line options. |
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76 | */ |
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77 | |
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78 | extern int debug; /* Debug flag */ |
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79 | extern int kdebugflag; /* Tell kernel to print debug messages */ |
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80 | extern int default_device; /* Using /dev/tty or equivalent */ |
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81 | extern char devnam[]; /* Device name */ |
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82 | extern int crtscts; /* Use hardware flow control */ |
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83 | extern int modem; /* Use modem control lines */ |
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84 | extern int inspeed; /* Input/Output speed requested */ |
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85 | extern u_int32_t netmask; /* IP netmask to set on interface */ |
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86 | extern int lockflag; /* Create lock file to lock the serial dev */ |
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87 | extern int nodetach; /* Don't detach from controlling tty */ |
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88 | extern char *connector[]; /* Script to establish physical link */ |
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89 | extern char *disconnector[]; /* Script to disestablish physical link */ |
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90 | extern char *welcomer[]; /* Script to welcome client after connection */ |
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91 | extern int maxconnect; /* Maximum connect time (seconds) */ |
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92 | extern char user[]; /* Our name for authenticating ourselves */ |
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93 | extern char passwd[]; /* Password for PAP */ |
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94 | extern int auth_required; /* Peer is required to authenticate */ |
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95 | extern int proxyarp; /* Set up proxy ARP entry for peer */ |
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96 | extern int persist; /* Reopen link after it goes down */ |
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97 | extern int uselogin; /* Use /etc/passwd for checking PAP */ |
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98 | extern int lcp_echo_interval; /* Interval between LCP echo-requests */ |
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99 | extern int lcp_echo_fails; /* Tolerance to unanswered echo-requests */ |
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100 | extern char our_name[]; /* Our name for authentication purposes */ |
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101 | extern char remote_name[]; /* Peer's name for authentication */ |
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102 | extern int explicit_remote;/* remote_name specified with remotename opt */ |
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103 | extern int usehostname; /* Use hostname for our_name */ |
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104 | extern int disable_defaultip; /* Don't use hostname for default IP adrs */ |
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105 | extern int demand; /* Do dial-on-demand */ |
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106 | extern char *ipparam; /* Extra parameter for ip up/down scripts */ |
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107 | extern int cryptpap; /* Others' PAP passwords are encrypted */ |
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108 | extern int idle_time_limit;/* Shut down link if idle for this long */ |
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109 | extern int holdoff; /* Dead time before restarting */ |
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110 | extern int refuse_pap; /* Don't wanna auth. ourselves with PAP */ |
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111 | extern int refuse_chap; /* Don't wanna auth. ourselves with CHAP */ |
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112 | #ifdef PPP_FILTER |
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113 | extern struct bpf_program pass_filter; /* Filter for pkts to pass */ |
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114 | extern struct bpf_program active_filter; /* Filter for link-active pkts */ |
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115 | #endif |
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116 | |
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117 | |
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118 | #ifdef MSLANMAN |
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119 | extern int ms_lanman; /* Nonzero if use LanMan password instead of NT */ |
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120 | /* Has meaning only with MS-CHAP challenges */ |
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121 | #endif |
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122 | |
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123 | /* |
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124 | * Values for phase. |
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125 | */ |
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126 | #define PHASE_DEAD 0 |
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127 | #define PHASE_INITIALIZE 1 |
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128 | #define PHASE_DORMANT 2 |
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129 | #define PHASE_ESTABLISH 3 |
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130 | #define PHASE_AUTHENTICATE 4 |
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131 | #define PHASE_CALLBACK 5 |
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132 | #define PHASE_NETWORK 6 |
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133 | #define PHASE_TERMINATE 7 |
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134 | #define PHASE_HOLDOFF 8 |
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135 | |
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136 | /* |
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137 | * The following struct gives the addresses of procedures to call |
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138 | * for a particular protocol. |
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139 | */ |
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140 | struct protent { |
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141 | u_short protocol; /* PPP protocol number */ |
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142 | /* Initialization procedure */ |
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143 | void (*init) __P((int unit)); |
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144 | /* Process a received packet */ |
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145 | void (*input) __P((int unit, u_char *pkt, int len)); |
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146 | /* Process a received protocol-reject */ |
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147 | void (*protrej) __P((int unit)); |
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148 | /* Lower layer has come up */ |
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149 | void (*lowerup) __P((int unit)); |
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150 | /* Lower layer has gone down */ |
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151 | void (*lowerdown) __P((int unit)); |
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152 | /* Open the protocol */ |
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153 | void (*open) __P((int unit)); |
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154 | /* Close the protocol */ |
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155 | void (*close) __P((int unit, char *reason)); |
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156 | /* Print a packet in readable form */ |
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157 | int (*printpkt) __P((u_char *pkt, int len, |
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158 | void (*printer) __P((void *, char *, ...)), |
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159 | void *arg)); |
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160 | /* Process a received data packet */ |
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161 | void (*datainput) __P((int unit, u_char *pkt, int len)); |
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162 | int enabled_flag; /* 0 iff protocol is disabled */ |
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163 | char *name; /* Text name of protocol */ |
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164 | /* Check requested options, assign defaults */ |
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165 | void (*check_options) __P((void)); |
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166 | /* Configure interface for demand-dial */ |
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167 | int (*demand_conf) __P((int unit)); |
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168 | /* Say whether to bring up link for this pkt */ |
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169 | int (*active_pkt) __P((u_char *pkt, int len)); |
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170 | }; |
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171 | |
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172 | /* Table of pointers to supported protocols */ |
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173 | extern struct protent *protocols[]; |
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174 | |
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175 | /* |
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176 | * Prototypes. |
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177 | */ |
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178 | |
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179 | /* Procedures exported from main.c. */ |
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180 | void detach __P((void)); /* Detach from controlling tty */ |
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181 | void die __P((int)); /* Cleanup and exit */ |
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182 | void quit __P((void)); /* like die(1) */ |
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183 | void novm __P((char *)); /* Say we ran out of memory, and die */ |
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184 | void my_timeout __P((void (*func)(void *), void *arg, int t)); |
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185 | /* Call func(arg) after t seconds */ |
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186 | void untimeout __P((void (*func)(void *), void *arg)); |
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187 | /* Cancel call to func(arg) */ |
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188 | int run_program __P((char *prog, char **args, int must_exist)); |
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189 | /* Run program prog with args in child */ |
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190 | void demuxprotrej __P((int, int)); |
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191 | /* Demultiplex a Protocol-Reject */ |
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192 | void format_packet __P((u_char *, int, void (*) (void *, char *, ...), |
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193 | void *)); /* Format a packet in human-readable form */ |
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194 | void log_packet __P((u_char *, int, char *, int)); |
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195 | /* Format a packet and log it with syslog */ |
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196 | void print_string __P((char *, int, void (*) (void *, char *, ...), |
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197 | void *)); /* Format a string for output */ |
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198 | int fmtmsg __P((char *, int, char *, ...)); /* sprintf++ */ |
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199 | int vfmtmsg __P((char *, int, char *, va_list)); /* vsprintf++ */ |
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200 | void script_setenv __P((char *, char *)); /* set script env var */ |
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201 | void script_unsetenv __P((char *)); /* unset script env var */ |
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202 | /* My procedures */ |
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203 | int connect_stb(); |
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204 | int disconnect_stb(); |
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205 | int pppdmain(int, char*[]); |
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206 | int chatmain(char*); |
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207 | |
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208 | /* Procedures exported from auth.c */ |
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209 | |
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210 | void link_required __P((int)); /* we are starting to use the link */ |
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211 | void link_terminated __P((int)); /* we are finished with the link */ |
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212 | void link_down __P((int)); /* the LCP layer has left the Opened state */ |
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213 | void link_established __P((int)); /* the link is up; authenticate now */ |
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214 | void np_up __P((int, int)); /* a network protocol has come up */ |
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215 | void np_down __P((int, int)); /* a network protocol has gone down */ |
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216 | void np_finished __P((int, int)); /* a network protocol no longer needs link */ |
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217 | void auth_peer_fail __P((int, int)); |
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218 | /* peer failed to authenticate itself */ |
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219 | void auth_peer_success __P((int, int, char *, int)); |
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220 | /* peer successfully authenticated itself */ |
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221 | void auth_withpeer_fail __P((int, int)); |
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222 | /* we failed to authenticate ourselves */ |
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223 | void auth_withpeer_success __P((int, int)); |
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224 | /* we successfully authenticated ourselves */ |
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225 | void auth_check_options __P((void)); |
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226 | /* check authentication options supplied */ |
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227 | void auth_reset __P((int)); /* check what secrets we have */ |
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228 | int check_passwd __P((int, char *, int, char *, int, char **, int *)); |
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229 | /* Check peer-supplied username/password */ |
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230 | int get_secret __P((int, char *, char *, char *, int *, int)); |
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231 | /* get "secret" for chap */ |
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232 | int auth_ip_addr __P((int, u_int32_t)); |
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233 | /* check if IP address is authorized */ |
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234 | int bad_ip_adrs __P((u_int32_t)); |
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235 | /* check if IP address is unreasonable */ |
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236 | void check_access __P((FILE *, char *)); |
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237 | /* check permissions on secrets file */ |
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238 | |
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239 | /* Procedures exported from demand.c */ |
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240 | void demand_conf __P((void)); /* config interface(s) for demand-dial */ |
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241 | void demand_block __P((void)); /* set all NPs to queue up packets */ |
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242 | void demand_unblock __P((void)); /* set all NPs to pass packets */ |
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243 | void demand_discard __P((void)); /* set all NPs to discard packets */ |
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244 | void demand_rexmit __P((int)); /* retransmit saved frames for an NP */ |
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245 | int loop_chars __P((unsigned char *, int)); /* process chars from loopback */ |
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246 | int loop_frame __P((unsigned char *, int)); /* process frame from loopback */ |
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247 | |
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248 | /* Procedures exported from sys-*.c */ |
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249 | void sys_init __P((void)); /* Do system-dependent initialization */ |
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250 | void sys_cleanup __P((void)); /* Restore system state before exiting */ |
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251 | void sys_check_options __P((void)); /* Check options specified */ |
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252 | void sys_close __P((void)); /* Clean up in a child before execing */ |
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253 | int ppp_available __P((void)); /* Test whether ppp kernel support exists */ |
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254 | void open_ppp_loopback __P((void)); /* Open loopback for demand-dialling */ |
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255 | void establish_ppp __P((int)); /* Turn serial port into a ppp interface */ |
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256 | void restore_loop __P((void)); /* Transfer ppp unit back to loopback */ |
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257 | void disestablish_ppp __P((int)); /* Restore port to normal operation */ |
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258 | void clean_check __P((void)); /* Check if line was 8-bit clean */ |
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259 | void set_up_tty __P((int, int)); /* Set up port's speed, parameters, etc. */ |
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260 | void restore_tty __P((int)); /* Restore port's original parameters */ |
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261 | void setdtr __P((int, int)); /* Raise or lower port's DTR line */ |
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262 | void output __P((int, u_char *, int)); /* Output a PPP packet */ |
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263 | void wait_input __P((struct timeval *)); |
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264 | /* Wait for input, with timeout */ |
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265 | void wait_loop_output __P((struct timeval *)); |
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266 | /* Wait for pkt from loopback, with timeout */ |
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267 | void wait_time __P((struct timeval *)); /* Wait for given length of time */ |
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268 | int read_packet __P((u_char *)); /* Read PPP packet */ |
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269 | int get_loop_output __P((void)); /* Read pkts from loopback */ |
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270 | void ppp_send_config __P((int, int, u_int32_t, int, int)); |
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271 | /* Configure i/f transmit parameters */ |
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272 | void ppp_set_xaccm __P((int, ext_accm)); |
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273 | /* Set extended transmit ACCM */ |
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274 | void ppp_recv_config __P((int, int, u_int32_t, int, int)); |
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275 | /* Configure i/f receive parameters */ |
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276 | int ccp_test __P((int, u_char *, int, int)); |
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277 | /* Test support for compression scheme */ |
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278 | void ccp_flags_set __P((int, int, int)); |
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279 | /* Set kernel CCP state */ |
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280 | int ccp_fatal_error __P((int)); /* Test for fatal decomp error in kernel */ |
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281 | int get_idle_time __P((int, struct ppp_idle *)); |
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282 | /* Find out how long link has been idle */ |
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283 | int sifvjcomp __P((int, int, int, int)); |
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284 | /* Configure VJ TCP header compression */ |
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285 | int sifup __P((int)); /* Configure i/f up (for IP) */ |
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286 | int sifnpmode __P((int u, int proto, enum NPmode mode)); |
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287 | /* Set mode for handling packets for proto */ |
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288 | int sifdown __P((int)); /* Configure i/f down (for IP) */ |
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289 | int sifaddr __P((int, u_int32_t, u_int32_t, u_int32_t)); |
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290 | /* Configure IP addresses for i/f */ |
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291 | int cifaddr __P((int, u_int32_t, u_int32_t)); |
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292 | /* Reset i/f IP addresses */ |
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293 | int sifdefaultroute __P((int, u_int32_t, u_int32_t)); |
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294 | /* Create default route through i/f */ |
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295 | int cifdefaultroute __P((int, u_int32_t, u_int32_t)); |
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296 | /* Delete default route through i/f */ |
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297 | int sifproxyarp __P((int, u_int32_t)); |
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298 | /* Add proxy ARP entry for peer */ |
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299 | int cifproxyarp __P((int, u_int32_t)); |
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300 | /* Delete proxy ARP entry for peer */ |
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301 | u_int32_t GetMask __P((u_int32_t)); /* Get appropriate netmask for address */ |
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302 | int lock __P((char *)); /* Create lock file for device */ |
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303 | void unlock __P((void)); /* Delete previously-created lock file */ |
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304 | int daemon __P((int, int)); /* Detach us from terminal session */ |
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305 | void logwtmp __P((const char *, const char *, const char *)); |
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306 | /* Write entry to wtmp file */ |
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307 | int get_host_seed __P((void)); /* Get host-dependent random number seed */ |
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308 | #ifdef PPP_FILTER |
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309 | int set_filters __P((struct bpf_program *pass, struct bpf_program *active)); |
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310 | /* Set filter programs in kernel */ |
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311 | #endif |
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312 | |
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313 | /* Procedures exported from options.c */ |
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314 | int parse_args __P((int argc, char **argv)); |
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315 | /* Parse options from arguments given */ |
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316 | void usage __P((void)); /* Print a usage message */ |
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317 | int options_from_file __P((char *filename, int must_exist, int check_prot, |
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318 | int privileged)); |
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319 | /* Parse options from an options file */ |
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320 | int options_from_user __P((void)); /* Parse options from user's .ppprc */ |
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321 | int options_for_tty __P((void)); /* Parse options from /etc/ppp/options.tty */ |
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322 | void scan_args __P((int argc, char **argv)); |
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323 | /* Look for tty name in command-line args */ |
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324 | int getword __P((FILE *f, char *word, int *newlinep, char *filename)); |
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325 | /* Read a word from a file */ |
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326 | void option_error __P((char *fmt, ...)); |
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327 | /* Print an error message about an option */ |
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328 | |
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329 | /* |
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330 | * This structure is used to store information about certain |
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331 | * options, such as where the option value came from (/etc/ppp/options, |
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332 | * command line, etc.) and whether it came from a privileged source. |
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333 | */ |
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334 | |
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335 | struct option_info { |
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336 | int priv; /* was value set by sysadmin? */ |
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337 | char *source; /* where option came from */ |
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338 | }; |
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339 | |
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340 | extern struct option_info auth_req_info; |
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341 | extern struct option_info connector_info; |
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342 | extern struct option_info disconnector_info; |
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343 | extern struct option_info welcomer_info; |
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344 | extern struct option_info devnam_info; |
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345 | |
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346 | /* |
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347 | * Inline versions of get/put char/short/long. |
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348 | * Pointer is advanced; we assume that both arguments |
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349 | * are lvalues and will already be in registers. |
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350 | * cp MUST be u_char *. |
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351 | */ |
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352 | #define GETCHAR(c, cp) { \ |
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353 | (c) = *(cp)++; \ |
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354 | } |
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355 | #define PUTCHAR(c, cp) { \ |
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356 | *(cp)++ = (u_char) (c); \ |
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357 | } |
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358 | |
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359 | |
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360 | #define GETSHORT(s, cp) { \ |
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361 | (s) = *(cp)++ << 8; \ |
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362 | (s) |= *(cp)++; \ |
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363 | } |
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364 | #define PUTSHORT(s, cp) { \ |
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365 | *(cp)++ = (u_char) ((s) >> 8); \ |
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366 | *(cp)++ = (u_char) (s); \ |
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367 | } |
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368 | |
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369 | #define GETLONG(l, cp) { \ |
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370 | (l) = *(cp)++ << 8; \ |
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371 | (l) |= *(cp)++; (l) <<= 8; \ |
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372 | (l) |= *(cp)++; (l) <<= 8; \ |
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373 | (l) |= *(cp)++; \ |
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374 | } |
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375 | #define PUTLONG(l, cp) { \ |
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376 | *(cp)++ = (u_char) ((l) >> 24); \ |
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377 | *(cp)++ = (u_char) ((l) >> 16); \ |
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378 | *(cp)++ = (u_char) ((l) >> 8); \ |
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379 | *(cp)++ = (u_char) (l); \ |
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380 | } |
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381 | |
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382 | #define INCPTR(n, cp) ((cp) += (n)) |
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383 | #define DECPTR(n, cp) ((cp) -= (n)) |
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384 | |
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385 | #undef FALSE |
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386 | #define FALSE 0 |
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387 | #undef TRUE |
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388 | #define TRUE 1 |
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389 | |
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390 | /* |
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391 | * System dependent definitions for user-level 4.3BSD UNIX implementation. |
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392 | */ |
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393 | |
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394 | #define DEMUXPROTREJ(u, p) demuxprotrej(u, p) |
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395 | |
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396 | #define TIMEOUT(r, f, t) my_timeout((r), (f), (t)) |
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397 | #define UNTIMEOUT(r, f) untimeout((r), (f)) |
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398 | |
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399 | #define BCOPY(s, d, l) memcpy(d, s, l) |
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400 | #define BZERO(s, n) memset(s, 0, n) |
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401 | #define EXIT(u) quit() |
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402 | |
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403 | #define PRINTMSG(m, l) { m[l] = '\0'; syslog(LOG_INFO, "Remote message: %s", m); } |
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404 | |
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405 | /* |
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406 | * MAKEHEADER - Add Header fields to a packet. |
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407 | */ |
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408 | #define MAKEHEADER(p, t) { \ |
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409 | PUTCHAR(PPP_ALLSTATIONS, p); \ |
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410 | PUTCHAR(PPP_UI, p); \ |
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411 | PUTSHORT(t, p); } |
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412 | |
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413 | /* #define DEBUGALL */ |
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414 | |
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415 | #ifdef DEBUGALL |
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416 | #define DEBUGMAIN 1 |
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417 | #define DEBUGFSM 1 |
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418 | #define DEBUGLCP 1 |
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419 | #define DEBUGIPCP 1 |
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420 | #define DEBUGUPAP 1 |
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421 | #define DEBUGCHAP 1 |
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422 | #endif |
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423 | |
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424 | #ifndef LOG_PPP /* we use LOG_LOCAL2 for syslog by default */ |
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425 | #if defined(DEBUGMAIN) || defined(DEBUGFSM) || defined(DEBUGSYS) \ |
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426 | || defined(DEBUGLCP) || defined(DEBUGIPCP) || defined(DEBUGUPAP) \ |
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427 | || defined(DEBUGCHAP) || defined(DEBUG) |
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428 | #define LOG_PPP LOG_LOCAL2 |
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429 | #else |
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430 | #define LOG_PPP LOG_DAEMON |
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431 | #endif |
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432 | #endif /* LOG_PPP */ |
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433 | extern rtems_id pppdaemon_tid; |
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434 | #ifdef DEBUGMAIN |
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435 | #define MAINDEBUG(x) if (debug) syslog x |
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436 | #else |
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437 | #define MAINDEBUG(x) |
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438 | #endif |
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439 | |
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440 | #ifdef DEBUGSYS |
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441 | #define SYSDEBUG(x) if (debug) syslog x |
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442 | #else |
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443 | #define SYSDEBUG(x) |
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444 | #endif |
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445 | |
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446 | #ifdef DEBUGFSM |
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447 | #define FSMDEBUG(x) if (debug) syslog x |
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448 | #else |
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449 | #define FSMDEBUG(x) |
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450 | #endif |
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451 | |
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452 | #ifdef DEBUGLCP |
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453 | #define LCPDEBUG(x) if (debug) syslog x |
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454 | #else |
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455 | #define LCPDEBUG(x) |
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456 | #endif |
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457 | |
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458 | #ifdef DEBUGIPCP |
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459 | #define IPCPDEBUG(x) if (debug) syslog x |
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460 | #else |
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461 | #define IPCPDEBUG(x) |
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462 | #endif |
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463 | |
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464 | #ifdef DEBUGUPAP |
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465 | #define UPAPDEBUG(x) if (debug) syslog x |
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466 | #else |
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467 | #define UPAPDEBUG(x) |
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468 | #endif |
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469 | |
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470 | #ifdef DEBUGCHAP |
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471 | #define CHAPDEBUG(x) if (debug) syslog x |
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472 | #else |
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473 | #define CHAPDEBUG(x) |
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474 | #endif |
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475 | |
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476 | #ifdef DEBUGIPXCP |
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477 | #define IPXCPDEBUG(x) if (debug) syslog x |
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478 | #else |
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479 | #define IPXCPDEBUG(x) |
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480 | #endif |
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481 | |
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482 | #ifndef SIGTYPE |
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483 | #if defined(sun) || defined(SYSV) || defined(POSIX_SOURCE) |
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484 | #define SIGTYPE void |
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485 | #else |
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486 | #define SIGTYPE int |
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487 | #endif /* defined(sun) || defined(SYSV) || defined(POSIX_SOURCE) */ |
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488 | #endif /* SIGTYPE */ |
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489 | |
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490 | #ifndef MIN |
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491 | #define MIN(a, b) ((a) < (b)? (a): (b)) |
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492 | #endif |
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493 | #ifndef MAX |
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494 | #define MAX(a, b) ((a) > (b)? (a): (b)) |
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495 | #endif |
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496 | |
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497 | #endif /* __PPP_H__ */ |
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