1 | /* |
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2 | * main.c - Point-to-Point Protocol main module |
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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 | |
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20 | #define RCSID "$Id$" |
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21 | |
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22 | #include <stdio.h> |
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23 | #include <ctype.h> |
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24 | #include <stdlib.h> |
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25 | #include <string.h> |
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26 | #include <unistd.h> |
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27 | #include <signal.h> |
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28 | #include <errno.h> |
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29 | #include <fcntl.h> |
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30 | #include <netdb.h> |
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31 | #include <pwd.h> |
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32 | #include <setjmp.h> |
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33 | #include <sys/param.h> |
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34 | #include <sys/types.h> |
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35 | #include <sys/wait.h> |
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36 | #include <sys/time.h> |
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37 | #include <sys/resource.h> |
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38 | #include <sys/stat.h> |
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39 | #include <sys/socket.h> |
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40 | #include <netinet/in.h> |
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41 | |
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42 | #include <rtems.h> |
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43 | #include <rtems/rtems_bsdnet.h> |
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44 | |
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45 | #include "pppd.h" |
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46 | #include "magic.h" |
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47 | #include "fsm.h" |
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48 | #include "lcp.h" |
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49 | #include "ipcp.h" |
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50 | #ifdef INET6 |
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51 | #include "ipv6cp.h" |
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52 | #endif |
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53 | #include "upap.h" |
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54 | #include "chap.h" |
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55 | #include "ccp.h" |
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56 | #include "pathnames.h" |
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57 | #include "patchlevel.h" |
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58 | #include "rtemsdialer.h" |
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59 | |
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60 | #ifdef CBCP_SUPPORT |
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61 | #include "cbcp.h" |
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62 | #endif |
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63 | |
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64 | #ifdef IPX_CHANGE |
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65 | #include "ipxcp.h" |
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66 | #endif /* IPX_CHANGE */ |
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67 | #ifdef AT_CHANGE |
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68 | #include "atcp.h" |
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69 | #endif |
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70 | |
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71 | static const char rcsid[] = RCSID; |
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72 | |
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73 | /* interface vars */ |
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74 | char ifname[32]; /* Interface name */ |
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75 | int pppifunit; /* Interface unit number */ |
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76 | |
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77 | char *progname; /* Name of this program */ |
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78 | char hostname[MAXNAMELEN]; /* Our hostname */ |
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79 | static char ppp_devnam[MAXPATHLEN]; /* name of PPP tty (maybe ttypx) */ |
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80 | |
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81 | int ttyfd; /* Serial port file descriptor */ |
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82 | int baud_rate; /* Actual bits/second for serial device */ |
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83 | int hungup; /* terminal has been hung up */ |
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84 | int privileged; /* we're running as real uid root */ |
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85 | int need_holdoff; /* need holdoff period before restarting */ |
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86 | int detached; /* have detached from terminal */ |
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87 | struct stat devstat; /* result of stat() on devnam */ |
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88 | int prepass = 0; /* doing prepass to find device name */ |
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89 | int devnam_fixed; /* set while in options.ttyxx file */ |
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90 | volatile int status; /* exit status for pppd */ |
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91 | int unsuccess; /* # unsuccessful connection attempts */ |
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92 | int do_callback; /* != 0 if we should do callback next */ |
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93 | int doing_callback; /* != 0 if we are doing callback */ |
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94 | char *callback_script; /* script for doing callback */ |
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95 | dialerfp pppd_dialer; |
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96 | |
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97 | int (*holdoff_hook) __P((void)) = NULL; |
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98 | int (*new_phase_hook) __P((int)) = NULL; |
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99 | |
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100 | static int fd_ppp = -1; /* fd for talking PPP */ |
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101 | static int pty_master; /* fd for master side of pty */ |
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102 | static int pty_slave; /* fd for slave side of pty */ |
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103 | static int real_ttyfd; /* fd for actual serial port (not pty) */ |
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104 | |
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105 | int phase; /* where the link is at */ |
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106 | int kill_link; |
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107 | int open_ccp_flag; |
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108 | |
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109 | char **script_env; /* Env. variable values for scripts */ |
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110 | int s_env_nalloc; /* # words avail at script_env */ |
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111 | |
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112 | u_char outpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for outgoing packet */ |
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113 | u_char inpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for incoming packet */ |
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114 | |
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115 | char *no_ppp_msg = "Sorry - this system lacks PPP kernel support\n"; |
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116 | |
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117 | static struct timeval start_time; /* Time when link was started. */ |
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118 | |
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119 | struct pppd_stats link_stats; |
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120 | int link_connect_time; |
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121 | int link_stats_valid; |
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122 | |
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123 | /* Prototypes for procedures local to this file. */ |
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124 | |
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125 | static void cleanup __P((void)); |
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126 | static void close_tty __P((void)); |
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127 | static void get_input __P((void)); |
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128 | static void calltimeout __P((void)); |
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129 | static struct timeval *timeleft __P((struct timeval *)); |
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130 | static void holdoff_end __P((void *)); |
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131 | static int device_script __P((int, int, char *)); |
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132 | |
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133 | extern char *ttyname __P((int)); |
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134 | extern char *getlogin __P((void)); |
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135 | int pppdmain __P((int, char *[])); |
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136 | |
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137 | /* |
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138 | * PPP Data Link Layer "protocol" table. |
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139 | * One entry per supported protocol. |
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140 | * The last entry must be NULL. |
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141 | */ |
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142 | struct protent *protocols[] = { |
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143 | &lcp_protent, |
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144 | &pap_protent, |
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145 | &chap_protent, |
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146 | #ifdef CBCP_SUPPORT |
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147 | &cbcp_protent, |
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148 | #endif |
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149 | &ipcp_protent, |
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150 | #ifdef INET6 |
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151 | &ipv6cp_protent, |
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152 | #endif |
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153 | &ccp_protent, |
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154 | #ifdef IPX_CHANGE |
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155 | &ipxcp_protent, |
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156 | #endif |
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157 | #ifdef AT_CHANGE |
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158 | &atcp_protent, |
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159 | #endif |
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160 | NULL |
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161 | }; |
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162 | |
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163 | int |
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164 | pppdmain(argc, argv) |
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165 | int argc; |
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166 | char *argv[]; |
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167 | { |
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168 | int i, fdflags, t; |
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169 | char *connector; |
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170 | struct timeval timo; |
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171 | struct protent *protp; |
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172 | |
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173 | new_phase(PHASE_INITIALIZE); |
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174 | |
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175 | script_env = NULL; |
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176 | hostname[MAXNAMELEN-1] = 0; |
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177 | privileged = 1; |
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178 | privileged_option = 1; |
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179 | |
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180 | /* |
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181 | * Initialize magic number generator now so that protocols may |
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182 | * use magic numbers in initialization. |
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183 | */ |
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184 | magic_init(); |
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185 | |
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186 | #ifdef XXX_XXX |
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187 | /* moved code the the rtems_pppd_reset_options function */ |
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188 | |
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189 | /* |
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190 | * Initialize to the standard option set, then parse, in order, |
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191 | * the system options file, the user's options file, |
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192 | * the tty's options file, and the command line arguments. |
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193 | */ |
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194 | for (i = 0; (protp = protocols[i]) != NULL; ++i) |
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195 | (*protp->init)(0); |
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196 | #endif |
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197 | |
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198 | progname = *argv; |
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199 | |
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200 | |
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201 | if (!ppp_available()) { |
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202 | option_error(no_ppp_msg); |
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203 | return(EXIT_NO_KERNEL_SUPPORT); |
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204 | } |
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205 | |
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206 | /* |
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207 | * Check that the options given are valid and consistent. |
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208 | */ |
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209 | if (!sys_check_options()) { |
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210 | return(EXIT_OPTION_ERROR); |
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211 | } |
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212 | if (!auth_check_options()) { |
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213 | return(EXIT_OPTION_ERROR); |
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214 | } |
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215 | for (i = 0; (protp = protocols[i]) != NULL; ++i) |
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216 | if (protp->check_options != NULL) |
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217 | (*protp->check_options)(); |
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218 | |
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219 | /* default holdoff to 0 if no connect script has been given */ |
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220 | if (connect_script == 0 && !holdoff_specified) |
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221 | holdoff = 0; |
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222 | |
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223 | if (default_device) |
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224 | nodetach = 1; |
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225 | |
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226 | /* |
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227 | * Initialize system-dependent stuff. |
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228 | */ |
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229 | sys_init(); |
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230 | /* if (debug) |
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231 | setlogmask(LOG_UPTO(LOG_DEBUG)); |
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232 | */ |
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233 | |
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234 | do_callback = 0; |
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235 | for (;;) { |
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236 | |
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237 | need_holdoff = 1; |
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238 | ttyfd = -1; |
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239 | real_ttyfd = -1; |
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240 | status = EXIT_OK; |
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241 | ++unsuccess; |
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242 | doing_callback = do_callback; |
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243 | do_callback = 0; |
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244 | |
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245 | new_phase(PHASE_SERIALCONN); |
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246 | |
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247 | /* |
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248 | * Get a pty master/slave pair if the pty, notty, or record |
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249 | * options were specified. |
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250 | */ |
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251 | strlcpy(ppp_devnam, devnam, sizeof(ppp_devnam)); |
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252 | pty_master = -1; |
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253 | pty_slave = -1; |
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254 | |
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255 | /* |
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256 | * Open the serial device and set it up to be the ppp interface. |
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257 | * First we open it in non-blocking mode so we can set the |
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258 | * various termios flags appropriately. If we aren't dialling |
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259 | * out and we want to use the modem lines, we reopen it later |
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260 | * in order to wait for the carrier detect signal from the modem. |
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261 | */ |
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262 | hungup = 0; |
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263 | kill_link = 0; |
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264 | connector = doing_callback? callback_script: connect_script; |
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265 | if (devnam[0] != 0) { |
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266 | for (;;) { |
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267 | /* If the user specified the device name, become the |
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268 | user before opening it. */ |
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269 | int err; |
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270 | ttyfd = open(devnam, O_NONBLOCK | O_RDWR, 0); |
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271 | err = errno; |
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272 | if (ttyfd >= 0) { |
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273 | break; |
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274 | } |
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275 | errno = err; |
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276 | if (err != EINTR) { |
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277 | error("Failed to open %s: %m", devnam); |
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278 | status = EXIT_OPEN_FAILED; |
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279 | } |
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280 | if (!persist || err != EINTR) |
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281 | goto fail; |
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282 | } |
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283 | if ((fdflags = fcntl(ttyfd, F_GETFL)) == -1 |
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284 | || fcntl(ttyfd, F_SETFL, fdflags & ~O_NONBLOCK) < 0) |
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285 | warn("Couldn't reset non-blocking mode on device: %m"); |
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286 | |
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287 | /* |
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288 | * Set line speed, flow control, etc. |
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289 | * If we have a non-null connection or initializer script, |
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290 | * on most systems we set CLOCAL for now so that we can talk |
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291 | * to the modem before carrier comes up. But this has the |
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292 | * side effect that we might miss it if CD drops before we |
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293 | * get to clear CLOCAL below. On systems where we can talk |
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294 | * successfully to the modem with CLOCAL clear and CD down, |
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295 | * we could clear CLOCAL at this point. |
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296 | */ |
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297 | set_up_tty(ttyfd, ((connector != NULL && connector[0] != 0) |
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298 | || initializer != NULL)); |
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299 | real_ttyfd = ttyfd; |
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300 | } |
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301 | |
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302 | /* run connection script */ |
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303 | if ((connector && connector[0]) || initializer) { |
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304 | if (real_ttyfd != -1) { |
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305 | /* XXX do this if doing_callback == CALLBACK_DIALIN? */ |
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306 | if (!default_device && modem) { |
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307 | setdtr(real_ttyfd, 0); /* in case modem is off hook */ |
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308 | sleep(1); |
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309 | setdtr(real_ttyfd, 1); |
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310 | } |
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311 | } |
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312 | |
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313 | if (initializer && initializer[0]) { |
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314 | if (device_script(ttyfd, DIALER_INIT, initializer) < 0) { |
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315 | error("Initializer script failed"); |
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316 | status = EXIT_INIT_FAILED; |
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317 | goto fail; |
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318 | } |
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319 | if (kill_link) |
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320 | goto disconnect; |
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321 | |
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322 | info("Serial port initialized."); |
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323 | } |
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324 | |
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325 | if (connector && connector[0]) { |
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326 | if (device_script(ttyfd, DIALER_CONNECT, connector) < 0) { |
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327 | error("Connect script failed"); |
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328 | status = EXIT_CONNECT_FAILED; |
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329 | goto fail; |
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330 | } |
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331 | if (kill_link) |
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332 | goto disconnect; |
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333 | |
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334 | info("Serial connection established."); |
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335 | } |
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336 | |
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337 | /* set line speed, flow control, etc.; |
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338 | clear CLOCAL if modem option */ |
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339 | if (real_ttyfd != -1) |
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340 | set_up_tty(real_ttyfd, 0); |
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341 | |
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342 | if (doing_callback == CALLBACK_DIALIN) |
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343 | connector = NULL; |
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344 | } |
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345 | |
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346 | /* reopen tty if necessary to wait for carrier */ |
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347 | if (connector == NULL && modem && devnam[0] != 0) { |
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348 | for (;;) { |
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349 | if ((i = open(devnam, O_RDWR)) >= 0) |
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350 | break; |
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351 | if (errno != EINTR) { |
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352 | error("Failed to reopen %s: %m", devnam); |
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353 | status = EXIT_OPEN_FAILED; |
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354 | } |
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355 | if (!persist || errno != EINTR || hungup || kill_link) |
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356 | goto fail; |
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357 | } |
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358 | close(i); |
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359 | } |
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360 | |
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361 | info("Serial connection established."); |
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362 | sleep(1); |
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363 | |
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364 | /* run welcome script, if any */ |
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365 | if (welcomer && welcomer[0]) { |
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366 | if (device_script(ttyfd, DIALER_WELCOME, welcomer) < 0) |
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367 | warn("Welcome script failed"); |
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368 | } |
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369 | |
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370 | /* set up the serial device as a ppp interface */ |
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371 | fd_ppp = establish_ppp(ttyfd); |
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372 | if (fd_ppp < 0) { |
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373 | status = EXIT_FATAL_ERROR; |
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374 | goto disconnect; |
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375 | } |
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376 | |
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377 | if (!demand) { |
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378 | info("Using interface ppp%d", pppifunit); |
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379 | slprintf(ifname, sizeof(ifname), "ppp%d", pppifunit); |
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380 | } |
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381 | |
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382 | /* |
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383 | * Start opening the connection and wait for |
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384 | * incoming events (reply, timeout, etc.). |
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385 | */ |
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386 | notice("Connect: %s <--> %s", ifname, ppp_devnam); |
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387 | gettimeofday(&start_time, NULL); |
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388 | |
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389 | lcp_lowerup(0); |
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390 | lcp_open(0); /* Start protocol */ |
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391 | |
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392 | open_ccp_flag = 0; |
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393 | status = EXIT_NEGOTIATION_FAILED; |
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394 | new_phase(PHASE_ESTABLISH); |
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395 | while (phase != PHASE_DEAD) { |
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396 | wait_input(timeleft(&timo)); |
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397 | calltimeout(); |
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398 | get_input(); |
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399 | |
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400 | if (kill_link) { |
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401 | lcp_close(0, "User request"); |
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402 | kill_link = 0; |
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403 | } |
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404 | if (open_ccp_flag) { |
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405 | if (phase == PHASE_NETWORK || phase == PHASE_RUNNING) { |
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406 | ccp_fsm[0].flags = OPT_RESTART; /* clears OPT_SILENT */ |
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407 | (*ccp_protent.open)(0); |
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408 | } |
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409 | open_ccp_flag = 0; |
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410 | } |
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411 | } |
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412 | |
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413 | /* |
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414 | * If we may want to bring the link up again, transfer |
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415 | * the ppp unit back to the loopback. Set the |
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416 | * real serial device back to its normal mode of operation. |
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417 | */ |
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418 | clean_check(); |
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419 | if (demand) |
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420 | restore_loop(); |
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421 | disestablish_ppp(ttyfd); |
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422 | fd_ppp = -1; |
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423 | if (!hungup) |
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424 | lcp_lowerdown(0); |
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425 | |
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426 | /* |
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427 | * Run disconnector script, if requested. |
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428 | * XXX we may not be able to do this if the line has hung up! |
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429 | */ |
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430 | disconnect: |
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431 | if (disconnect_script && !hungup) { |
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432 | new_phase(PHASE_DISCONNECT); |
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433 | if (real_ttyfd >= 0) |
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434 | set_up_tty(real_ttyfd, 1); |
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435 | if (device_script(ttyfd, DIALER_DISCONNECT, disconnect_script) < 0) { |
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436 | warn("disconnect script failed"); |
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437 | } else { |
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438 | info("Serial link disconnected."); |
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439 | } |
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440 | } |
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441 | |
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442 | fail: |
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443 | if (pty_master >= 0) |
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444 | close(pty_master); |
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445 | if (pty_slave >= 0) |
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446 | close(pty_slave); |
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447 | if (real_ttyfd >= 0) |
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448 | close_tty(); |
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449 | |
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450 | if (!persist || (maxfail > 0 && unsuccess >= maxfail)) |
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451 | break; |
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452 | |
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453 | kill_link = 0; |
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454 | if (demand) |
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455 | demand_discard(); |
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456 | t = need_holdoff? holdoff: 0; |
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457 | if (holdoff_hook) |
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458 | t = (*holdoff_hook)(); |
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459 | if (t > 0) { |
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460 | new_phase(PHASE_HOLDOFF); |
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461 | TIMEOUT(holdoff_end, NULL, t); |
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462 | do { |
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463 | wait_input(timeleft(&timo)); |
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464 | |
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465 | calltimeout(); |
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466 | if (kill_link) { |
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467 | kill_link = 0; |
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468 | new_phase(PHASE_DORMANT); /* allow signal to end holdoff */ |
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469 | } |
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470 | } while (phase == PHASE_HOLDOFF); |
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471 | if (!persist) |
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472 | break; |
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473 | } |
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474 | } |
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475 | |
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476 | die(status); |
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477 | return status; |
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478 | } |
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479 | |
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480 | /* |
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481 | * holdoff_end - called via a timeout when the holdoff period ends. |
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482 | */ |
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483 | static void |
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484 | holdoff_end(arg) |
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485 | void *arg; |
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486 | { |
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487 | new_phase(PHASE_DORMANT); |
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488 | } |
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489 | |
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490 | /* List of protocol names, to make our messages a little more informative. */ |
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491 | struct protocol_list { |
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492 | u_short proto; |
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493 | const char *name; |
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494 | } protocol_list[] = { |
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495 | { 0x21, "IP" }, |
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496 | { 0x23, "OSI Network Layer" }, |
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497 | { 0x25, "Xerox NS IDP" }, |
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498 | { 0x27, "DECnet Phase IV" }, |
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499 | { 0x29, "Appletalk" }, |
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500 | { 0x2b, "Novell IPX" }, |
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501 | { 0x2d, "VJ compressed TCP/IP" }, |
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502 | { 0x2f, "VJ uncompressed TCP/IP" }, |
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503 | { 0x31, "Bridging PDU" }, |
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504 | { 0x33, "Stream Protocol ST-II" }, |
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505 | { 0x35, "Banyan Vines" }, |
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506 | { 0x39, "AppleTalk EDDP" }, |
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507 | { 0x3b, "AppleTalk SmartBuffered" }, |
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508 | { 0x3d, "Multi-Link" }, |
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509 | { 0x3f, "NETBIOS Framing" }, |
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510 | { 0x41, "Cisco Systems" }, |
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511 | { 0x43, "Ascom Timeplex" }, |
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512 | { 0x45, "Fujitsu Link Backup and Load Balancing (LBLB)" }, |
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513 | { 0x47, "DCA Remote Lan" }, |
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514 | { 0x49, "Serial Data Transport Protocol (PPP-SDTP)" }, |
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515 | { 0x4b, "SNA over 802.2" }, |
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516 | { 0x4d, "SNA" }, |
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517 | { 0x4f, "IP6 Header Compression" }, |
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518 | { 0x6f, "Stampede Bridging" }, |
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519 | { 0xfb, "single-link compression" }, |
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520 | { 0xfd, "1st choice compression" }, |
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521 | { 0x0201, "802.1d Hello Packets" }, |
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522 | { 0x0203, "IBM Source Routing BPDU" }, |
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523 | { 0x0205, "DEC LANBridge100 Spanning Tree" }, |
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524 | { 0x0231, "Luxcom" }, |
---|
525 | { 0x0233, "Sigma Network Systems" }, |
---|
526 | { 0x8021, "Internet Protocol Control Protocol" }, |
---|
527 | { 0x8023, "OSI Network Layer Control Protocol" }, |
---|
528 | { 0x8025, "Xerox NS IDP Control Protocol" }, |
---|
529 | { 0x8027, "DECnet Phase IV Control Protocol" }, |
---|
530 | { 0x8029, "Appletalk Control Protocol" }, |
---|
531 | { 0x802b, "Novell IPX Control Protocol" }, |
---|
532 | { 0x8031, "Bridging NCP" }, |
---|
533 | { 0x8033, "Stream Protocol Control Protocol" }, |
---|
534 | { 0x8035, "Banyan Vines Control Protocol" }, |
---|
535 | { 0x803d, "Multi-Link Control Protocol" }, |
---|
536 | { 0x803f, "NETBIOS Framing Control Protocol" }, |
---|
537 | { 0x8041, "Cisco Systems Control Protocol" }, |
---|
538 | { 0x8043, "Ascom Timeplex" }, |
---|
539 | { 0x8045, "Fujitsu LBLB Control Protocol" }, |
---|
540 | { 0x8047, "DCA Remote Lan Network Control Protocol (RLNCP)" }, |
---|
541 | { 0x8049, "Serial Data Control Protocol (PPP-SDCP)" }, |
---|
542 | { 0x804b, "SNA over 802.2 Control Protocol" }, |
---|
543 | { 0x804d, "SNA Control Protocol" }, |
---|
544 | { 0x804f, "IP6 Header Compression Control Protocol" }, |
---|
545 | { 0x006f, "Stampede Bridging Control Protocol" }, |
---|
546 | { 0x80fb, "Single Link Compression Control Protocol" }, |
---|
547 | { 0x80fd, "Compression Control Protocol" }, |
---|
548 | { 0xc021, "Link Control Protocol" }, |
---|
549 | { 0xc023, "Password Authentication Protocol" }, |
---|
550 | { 0xc025, "Link Quality Report" }, |
---|
551 | { 0xc027, "Shiva Password Authentication Protocol" }, |
---|
552 | { 0xc029, "CallBack Control Protocol (CBCP)" }, |
---|
553 | { 0xc081, "Container Control Protocol" }, |
---|
554 | { 0xc223, "Challenge Handshake Authentication Protocol" }, |
---|
555 | { 0xc281, "Proprietary Authentication Protocol" }, |
---|
556 | { 0, NULL }, |
---|
557 | }; |
---|
558 | |
---|
559 | /* |
---|
560 | * protocol_name - find a name for a PPP protocol. |
---|
561 | */ |
---|
562 | const char * |
---|
563 | protocol_name(proto) |
---|
564 | int proto; |
---|
565 | { |
---|
566 | struct protocol_list *lp; |
---|
567 | |
---|
568 | for (lp = protocol_list; lp->proto != 0; ++lp) |
---|
569 | if (proto == lp->proto) |
---|
570 | return lp->name; |
---|
571 | return NULL; |
---|
572 | } |
---|
573 | |
---|
574 | /* |
---|
575 | * get_input - called when incoming data is available. |
---|
576 | */ |
---|
577 | static void |
---|
578 | get_input(void) |
---|
579 | { |
---|
580 | int len, i; |
---|
581 | u_char *p; |
---|
582 | u_short protocol; |
---|
583 | struct protent *protp; |
---|
584 | |
---|
585 | p = inpacket_buf; /* point to beginning of packet buffer */ |
---|
586 | |
---|
587 | len = read_packet(inpacket_buf); |
---|
588 | if (len < 0) |
---|
589 | return; |
---|
590 | |
---|
591 | if (len == 0) { |
---|
592 | notice("Modem hangup"); |
---|
593 | hungup = 1; |
---|
594 | status = EXIT_HANGUP; |
---|
595 | lcp_lowerdown(0); /* serial link is no longer available */ |
---|
596 | link_terminated(0); |
---|
597 | return; |
---|
598 | } |
---|
599 | |
---|
600 | if (debug /*&& (debugflags & DBG_INPACKET)*/) |
---|
601 | dbglog("rcvd %P", p, len); |
---|
602 | |
---|
603 | if (len < PPP_HDRLEN) { |
---|
604 | MAINDEBUG(("io(): Received short packet.")); |
---|
605 | return; |
---|
606 | } |
---|
607 | |
---|
608 | p += 2; /* Skip address and control */ |
---|
609 | GETSHORT(protocol, p); |
---|
610 | len -= PPP_HDRLEN; |
---|
611 | |
---|
612 | /* |
---|
613 | * Toss all non-LCP packets unless LCP is OPEN. |
---|
614 | */ |
---|
615 | if (protocol != PPP_LCP && lcp_fsm[0].state != OPENED) { |
---|
616 | MAINDEBUG(("get_input: Received non-LCP packet when LCP not open.")); |
---|
617 | return; |
---|
618 | } |
---|
619 | |
---|
620 | /* |
---|
621 | * Until we get past the authentication phase, toss all packets |
---|
622 | * except LCP, LQR and authentication packets. |
---|
623 | */ |
---|
624 | if (phase <= PHASE_AUTHENTICATE |
---|
625 | && !(protocol == PPP_LCP || protocol == PPP_LQR |
---|
626 | || protocol == PPP_PAP || protocol == PPP_CHAP)) { |
---|
627 | MAINDEBUG(("get_input: discarding proto 0x%x in phase %d", |
---|
628 | protocol, phase)); |
---|
629 | return; |
---|
630 | } |
---|
631 | |
---|
632 | /* |
---|
633 | * Upcall the proper protocol input routine. |
---|
634 | */ |
---|
635 | for (i = 0; (protp = protocols[i]) != NULL; ++i) { |
---|
636 | if (protp->protocol == protocol && protp->enabled_flag) { |
---|
637 | (*protp->input)(0, p, len); |
---|
638 | return; |
---|
639 | } |
---|
640 | if (protocol == (protp->protocol & ~0x8000) && protp->enabled_flag |
---|
641 | && protp->datainput != NULL) { |
---|
642 | (*protp->datainput)(0, p, len); |
---|
643 | return; |
---|
644 | } |
---|
645 | } |
---|
646 | |
---|
647 | if (debug) { |
---|
648 | const char *pname = protocol_name(protocol); |
---|
649 | if (pname != NULL) |
---|
650 | warn("Unsupported protocol '%s' (0x%x) received", pname, protocol); |
---|
651 | else |
---|
652 | warn("Unsupported protocol 0x%x received", protocol); |
---|
653 | } |
---|
654 | lcp_sprotrej(0, p - PPP_HDRLEN, len + PPP_HDRLEN); |
---|
655 | |
---|
656 | return; |
---|
657 | } |
---|
658 | |
---|
659 | /* |
---|
660 | * new_phase - signal the start of a new phase of pppd's operation. |
---|
661 | */ |
---|
662 | void |
---|
663 | new_phase(p) |
---|
664 | int p; |
---|
665 | { |
---|
666 | phase = p; |
---|
667 | if (new_phase_hook) |
---|
668 | (*new_phase_hook)(p); |
---|
669 | } |
---|
670 | |
---|
671 | /* |
---|
672 | * die - clean up state and exit with the specified status. |
---|
673 | */ |
---|
674 | void |
---|
675 | die(status) |
---|
676 | int status; |
---|
677 | { |
---|
678 | cleanup(); |
---|
679 | } |
---|
680 | |
---|
681 | /* |
---|
682 | * cleanup - restore anything which needs to be restored before we exit |
---|
683 | */ |
---|
684 | /* ARGSUSED */ |
---|
685 | static void |
---|
686 | cleanup() |
---|
687 | { |
---|
688 | sys_cleanup(); |
---|
689 | |
---|
690 | if (fd_ppp >= 0) |
---|
691 | disestablish_ppp(ttyfd); |
---|
692 | if (real_ttyfd >= 0) |
---|
693 | close_tty(); |
---|
694 | |
---|
695 | sys_close(); |
---|
696 | } |
---|
697 | |
---|
698 | /* |
---|
699 | * close_tty - restore the terminal device and close it. |
---|
700 | */ |
---|
701 | static void |
---|
702 | close_tty() |
---|
703 | { |
---|
704 | /* drop dtr to hang up */ |
---|
705 | if (!default_device && modem) { |
---|
706 | setdtr(real_ttyfd, 0); |
---|
707 | /* |
---|
708 | * This sleep is in case the serial port has CLOCAL set by default, |
---|
709 | * and consequently will reassert DTR when we close the device. |
---|
710 | */ |
---|
711 | sleep(1); |
---|
712 | } |
---|
713 | |
---|
714 | restore_tty(real_ttyfd); |
---|
715 | |
---|
716 | close(real_ttyfd); |
---|
717 | real_ttyfd = -1; |
---|
718 | } |
---|
719 | |
---|
720 | /* |
---|
721 | * update_link_stats - get stats at link termination. |
---|
722 | */ |
---|
723 | void |
---|
724 | update_link_stats(u) |
---|
725 | int u; |
---|
726 | { |
---|
727 | struct timeval now; |
---|
728 | char numbuf[32]; |
---|
729 | |
---|
730 | if (!get_ppp_stats(u, &link_stats) |
---|
731 | || gettimeofday(&now, NULL) < 0) |
---|
732 | return; |
---|
733 | link_connect_time = now.tv_sec - start_time.tv_sec; |
---|
734 | link_stats_valid = 1; |
---|
735 | |
---|
736 | slprintf(numbuf, sizeof(numbuf), "%d", link_connect_time); |
---|
737 | slprintf(numbuf, sizeof(numbuf), "%d", link_stats.bytes_out); |
---|
738 | slprintf(numbuf, sizeof(numbuf), "%d", link_stats.bytes_in); |
---|
739 | } |
---|
740 | |
---|
741 | struct callout { |
---|
742 | struct timeval c_time; /* time at which to call routine */ |
---|
743 | void *c_arg; /* argument to routine */ |
---|
744 | void (*c_func) __P((void *)); /* routine */ |
---|
745 | struct callout *c_next; |
---|
746 | }; |
---|
747 | |
---|
748 | static struct callout *callout = NULL; /* Callout list */ |
---|
749 | static struct timeval timenow; /* Current time */ |
---|
750 | |
---|
751 | /* |
---|
752 | * timeout - Schedule a timeout. |
---|
753 | * |
---|
754 | * Note that this timeout takes the number of seconds, NOT hz (as in |
---|
755 | * the kernel). |
---|
756 | */ |
---|
757 | void |
---|
758 | ppptimeout(func, arg, time) |
---|
759 | void (*func) __P((void *)); |
---|
760 | void *arg; |
---|
761 | int time; |
---|
762 | { |
---|
763 | struct callout *newp, *p, **pp; |
---|
764 | |
---|
765 | MAINDEBUG(("Timeout %p:%p in %d seconds.", func, arg, time)); |
---|
766 | |
---|
767 | /* |
---|
768 | * Allocate timeout. |
---|
769 | */ |
---|
770 | if ((newp = (struct callout *) malloc(sizeof(struct callout))) == NULL) |
---|
771 | fatal("Out of memory in timeout()!"); |
---|
772 | newp->c_arg = arg; |
---|
773 | newp->c_func = func; |
---|
774 | gettimeofday(&timenow, NULL); |
---|
775 | newp->c_time.tv_sec = timenow.tv_sec + time; |
---|
776 | newp->c_time.tv_usec = timenow.tv_usec; |
---|
777 | |
---|
778 | /* |
---|
779 | * Find correct place and link it in. |
---|
780 | */ |
---|
781 | for (pp = &callout; (p = *pp); pp = &p->c_next) |
---|
782 | if (newp->c_time.tv_sec < p->c_time.tv_sec |
---|
783 | || (newp->c_time.tv_sec == p->c_time.tv_sec |
---|
784 | && newp->c_time.tv_usec < p->c_time.tv_usec)) |
---|
785 | break; |
---|
786 | newp->c_next = p; |
---|
787 | *pp = newp; |
---|
788 | } |
---|
789 | |
---|
790 | |
---|
791 | /* |
---|
792 | * untimeout - Unschedule a timeout. |
---|
793 | */ |
---|
794 | void |
---|
795 | untimeout(func, arg) |
---|
796 | void (*func) __P((void *)); |
---|
797 | void *arg; |
---|
798 | { |
---|
799 | struct callout **copp, *freep; |
---|
800 | |
---|
801 | MAINDEBUG(("Untimeout %p:%p.", func, arg)); |
---|
802 | |
---|
803 | /* |
---|
804 | * Find first matching timeout and remove it from the list. |
---|
805 | */ |
---|
806 | for (copp = &callout; (freep = *copp); copp = &freep->c_next) |
---|
807 | if (freep->c_func == func && freep->c_arg == arg) { |
---|
808 | *copp = freep->c_next; |
---|
809 | free((char *) freep); |
---|
810 | break; |
---|
811 | } |
---|
812 | } |
---|
813 | |
---|
814 | |
---|
815 | /* |
---|
816 | * calltimeout - Call any timeout routines which are now due. |
---|
817 | */ |
---|
818 | static void |
---|
819 | calltimeout() |
---|
820 | { |
---|
821 | struct callout *p; |
---|
822 | |
---|
823 | while (callout != NULL) { |
---|
824 | p = callout; |
---|
825 | |
---|
826 | if (gettimeofday(&timenow, NULL) < 0) |
---|
827 | fatal("Failed to get time of day: %m"); |
---|
828 | if (!(p->c_time.tv_sec < timenow.tv_sec |
---|
829 | || (p->c_time.tv_sec == timenow.tv_sec |
---|
830 | && p->c_time.tv_usec <= timenow.tv_usec))) |
---|
831 | break; /* no, it's not time yet */ |
---|
832 | |
---|
833 | callout = p->c_next; |
---|
834 | (*p->c_func)(p->c_arg); |
---|
835 | |
---|
836 | free((char *) p); |
---|
837 | } |
---|
838 | } |
---|
839 | |
---|
840 | |
---|
841 | /* |
---|
842 | * timeleft - return the length of time until the next timeout is due. |
---|
843 | */ |
---|
844 | static struct timeval * |
---|
845 | timeleft(tvp) |
---|
846 | struct timeval *tvp; |
---|
847 | { |
---|
848 | if (callout == NULL) |
---|
849 | return NULL; |
---|
850 | |
---|
851 | gettimeofday(&timenow, NULL); |
---|
852 | tvp->tv_sec = callout->c_time.tv_sec - timenow.tv_sec; |
---|
853 | tvp->tv_usec = callout->c_time.tv_usec - timenow.tv_usec; |
---|
854 | if (tvp->tv_usec < 0) { |
---|
855 | tvp->tv_usec += 1000000; |
---|
856 | tvp->tv_sec -= 1; |
---|
857 | } |
---|
858 | if (tvp->tv_sec < 0) |
---|
859 | tvp->tv_sec = tvp->tv_usec = 0; |
---|
860 | |
---|
861 | return tvp; |
---|
862 | } |
---|
863 | |
---|
864 | /* |
---|
865 | * device_script - run a program to talk to the serial device |
---|
866 | * (e.g. to run the connector or disconnector script). |
---|
867 | */ |
---|
868 | static int device_script(int fd, int mode, char *program) |
---|
869 | { |
---|
870 | int iReturn = -1; |
---|
871 | char pScript[128]; |
---|
872 | |
---|
873 | /* copyt script into temporary location */ |
---|
874 | strcpy(pScript, program); |
---|
875 | |
---|
876 | /* check to see if dialer was initialized */ |
---|
877 | if ( !pppd_dialer ) { |
---|
878 | /* set default dialer to chatmain */ |
---|
879 | pppd_dialer = chatmain; |
---|
880 | } |
---|
881 | |
---|
882 | /* check to see if dialer is set */ |
---|
883 | if ( pppd_dialer ) { |
---|
884 | /* call the dialer */ |
---|
885 | iReturn = (*pppd_dialer)(fd, mode, program); |
---|
886 | } |
---|
887 | |
---|
888 | return ( -iReturn ); |
---|
889 | } |
---|
890 | |
---|
891 | /* |
---|
892 | * novm - log an error message saying we ran out of memory, and die. |
---|
893 | */ |
---|
894 | void |
---|
895 | novm(msg) |
---|
896 | char *msg; |
---|
897 | { |
---|
898 | fatal("Virtual memory exhausted allocating %s\n", msg); |
---|
899 | } |
---|