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0
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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 2000-2002 Sun Microsystems, Inc. All rights reserved.
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5 * Use is subject to license terms.
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6 *
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7 * Permission to use, copy, modify, and distribute this software and its
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8 * documentation is hereby granted, provided that the above copyright
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9 * notice appears in all copies.
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10 *
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11 * SUN MAKES NO REPRESENTATION OR WARRANTIES ABOUT THE SUITABILITY OF
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12 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
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13 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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14 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
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15 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
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16 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES
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17 *
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18 * Copyright (c) 1989 Carnegie Mellon University.
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19 * All rights reserved.
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20 *
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21 * Redistribution and use in source and binary forms are permitted
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22 * provided that the above copyright notice and this paragraph are
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23 * duplicated in all such forms and that any documentation,
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24 * advertising materials, and other materials related to such
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25 * distribution and use acknowledge that the software was developed
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26 * by Carnegie Mellon University. The name of the
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27 * University may not be used to endorse or promote products derived
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28 * from this software without specific prior written permission.
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29 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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30 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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31 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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32 */
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33
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34 #pragma ident "@(#)main.c 1.8 02/06/20 SMI"
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35 #define RCSID "$Id: main.c,v 1.97 2000/04/24 02:54:16 masputra Exp $"
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36
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37 #include <stdio.h>
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38 #include <stdlib.h>
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39 #include <string.h>
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40 #include <unistd.h>
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41 #include <signal.h>
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42 #include <errno.h>
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43 #include <fcntl.h>
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44 #include <syslog.h>
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45 #include <netdb.h>
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46 #include <pwd.h>
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47 #include <setjmp.h>
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48 #include <sys/param.h>
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49 #include <sys/types.h>
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50 #include <sys/wait.h>
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51 #include <sys/time.h>
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52 #include <sys/resource.h>
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53 #include <sys/stat.h>
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54 #include <sys/socket.h>
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55 #include <netinet/in.h>
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56 #include <arpa/inet.h>
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57
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58 #include "pppd.h"
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59 #include "magic.h"
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60 #include "fsm.h"
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61 #include "lcp.h"
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62 #include "ipcp.h"
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63 #ifdef INET6
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64 #include "ipv6cp.h"
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65 #endif
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66 #include "upap.h"
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67 #include "chap.h"
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68 #include "ccp.h"
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69 #include "pathnames.h"
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70 #include "patchlevel.h"
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71
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72 #ifdef HAVE_MULTILINK
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73 #include "tdb.h"
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74 #endif
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75
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76 #ifdef CBCP_SUPPORT
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77 #include "cbcp.h"
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78 #endif
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79
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80 #ifdef IPX_CHANGE
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81 #include "ipxcp.h"
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82 #endif /* IPX_CHANGE */
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83 #ifdef AT_CHANGE
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84 #include "atcp.h"
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85 #endif
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86
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87 #if !defined(lint) && !defined(_lint)
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88 static const char rcsid[] = RCSID;
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89 #endif
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90
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91 /* interface vars */
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92 char ifname[32]; /* Interface name */
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93 int ifunit = -1; /* Interface unit number */
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94
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95 char *progname; /* Name of this program */
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96 char hostname[MAXHOSTNAMELEN+1]; /* Our hostname */
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97 static char pidfilename[MAXPATHLEN]; /* name of pid file */
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98 static char linkpidfile[MAXPATHLEN]; /* name of linkname pid file */
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99 char ppp_devnam[MAXPATHLEN]; /* name of PPP tty (maybe ttypx) */
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100 static uid_t uid; /* Our real user-id */
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101 static int conn_running; /* we have a [dis]connector running */
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102
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103 int ttyfd; /* Serial port file descriptor */
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104 mode_t tty_mode = (mode_t)-1; /* Original access permissions to tty */
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105 int baud_rate; /* Actual bits/second for serial device */
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106 bool hungup; /* terminal has been hung up */
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107 bool privileged; /* we're running as real uid root */
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108 bool need_holdoff; /* need holdoff period before restarting */
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109 bool detached; /* have detached from terminal */
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110 struct stat devstat; /* result of stat() on devnam */
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111 bool prepass = 0; /* doing prepass to find device name */
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112 int devnam_fixed; /* set while in options.ttyxx file */
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113 volatile int status; /* exit status for pppd */
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114 int unsuccess; /* # unsuccessful connection attempts */
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115 int do_callback; /* != 0 if we should do callback next */
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116 int doing_callback; /* != 0 if we are doing callback */
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117 char *callback_script; /* script for doing callback */
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118 #ifdef HAVE_MULTILINK
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119 TDB_CONTEXT *pppdb; /* database for storing status etc. */
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120 char db_key[32];
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121 #endif
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122
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123 /*
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124 * For plug-in usage:
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125 *
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126 * holdoff_hook - Can be used to change the demand-dial hold-off
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127 * time dynamically. This is normally set by the
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128 * "holdoff" option, and is 30 seconds by default.
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129 *
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130 * new_phase_hook - This is called for each change in the PPP
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131 * phase (per RFC 1661). This can be used to log
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132 * progress.
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133 *
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134 * check_options_hook - This is called before doing sys_init()
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135 * and allows the plugin to verify the selected options.
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136 *
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137 * updown_script_hook - This is called with the proposed
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138 * command-line arguments for any of the
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139 * /etc/ppp/{ip,ipv6,ipx,auth}-{up,down} scripts before
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140 * fork/exec. It can be used to add or change arguments.
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141 *
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142 * device_pipe_hook - If this is set, then an extra fd (3) is
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143 * passed to the connect/disconnect script. This extra
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144 * fd is the write side of a pipe, and the read side is
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145 * passed to this routine. This can be used to pass
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146 * arbitrary data from the script back to pppd.
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147 */
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148 int (*holdoff_hook) __P((void)) = NULL;
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149 int (*new_phase_hook) __P((int new, int old)) = NULL;
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150 int (*check_options_hook) __P((uid_t uid)) = NULL;
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151 int (*updown_script_hook) __P((const char ***argsp)) = NULL;
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152 void (*device_pipe_hook) __P((int pipefd)) = NULL;
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153
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154 static int fd_ppp = -1; /* fd for talking PPP */
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155 static int fd_loop; /* fd for getting demand-dial packets */
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156 static int pty_master; /* fd for master side of pty */
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157 int pty_slave = -1; /* fd for slave side of pty */
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158 static int real_ttyfd; /* fd for actual serial port (not pty) */
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159
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160 int phase; /* where the link is at */
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161 int kill_link;
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162 int open_ccp_flag;
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163
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164 static int waiting; /* for input from peer or timer expiration */
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165 static sigjmp_buf sigjmp;
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166
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167 char **script_env; /* Env. variable values for scripts */
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168 int s_env_nalloc; /* # words avail at script_env */
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169
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170 u_char outpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for outgoing packet */
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171 u_char inpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for incoming packet */
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172 u_char nak_buffer[PPP_MRU]; /* where we construct a nak packet */
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173
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174 static int n_children; /* # child processes still running */
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175 static bool got_sigchld; /* set if we have received a SIGCHLD */
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176 static sigset_t main_sigmask; /* signals blocked while dispatching */
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177
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178 static bool locked; /* lock() has succeeded */
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179 static bool privopen; /* don't lock, open device as root */
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180
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181 char *no_ppp_msg = "Sorry - this system lacks PPP kernel support\n";
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182
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183 GIDSET_TYPE groups[NGROUPS_MAX];/* groups the user is in */
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184 int ngroups; /* How many groups valid in groups */
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185
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186 static struct timeval start_time; /* Time when link was started. */
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187
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188 struct pppd_stats link_stats;
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189 int link_connect_time;
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190 bool link_stats_valid;
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191
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192 static pid_t charshunt_pid; /* Process ID for charshunt */
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193
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194 extern option_t general_options[];
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195 extern option_t auth_options[];
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196
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197 /*
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198 * We maintain a list of child process pids and
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199 * functions to call when they exit.
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200 */
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201 struct subprocess {
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202 pid_t pid;
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203 char *prog;
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204 void (*done) __P((void *, int));
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205 void *arg;
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206 struct subprocess *next;
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207 };
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208
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209 static struct subprocess *children;
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210
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211 /* Prototypes for procedures local to this file. */
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212
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213 static void setup_signals __P((void));
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214 static void create_pidfile __P((void));
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215 static void create_linkpidfile __P((void));
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216 static void cleanup __P((void));
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217 static void close_tty __P((void));
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218 static void get_input __P((void));
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219 static void calltimeout __P((void));
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220 static struct timeval *timeleft __P((struct timeval *));
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221 static void kill_my_pg __P((int));
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222 static void hup __P((int));
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223 static void term __P((int));
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224 static void chld __P((int));
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225 static void toggle_debug __P((int));
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226 static void open_ccp __P((int));
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227 static void bad_signal __P((int));
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228 static void holdoff_end __P((void *));
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229 static int device_script __P((char *, int, int, int, char *));
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230 static int reap_kids __P((int waitfor));
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231 static void record_child __P((pid_t, char *, void (*) (void *, int), void *));
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232 static int open_socket __P((char *));
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233 static int start_charshunt __P((int, int));
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234 static void charshunt_done __P((void *, int));
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235 static void charshunt __P((int, int, char *));
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236 static int record_write __P((FILE *, int code, u_char *buf, int nb,
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237 struct timeval *));
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238 static void final_reap __P((void));
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239
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240 #ifdef HAVE_MULTILINK
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241 static void update_db_entry __P((void));
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242 static void add_db_key __P((const char *));
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243 static void delete_db_key __P((const char *));
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244 static void cleanup_db __P((void));
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245 #endif
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246
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247 int main __P((int, char *[]));
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248
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249 #ifdef ultrix
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250 #undef O_NONBLOCK
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251 #define O_NONBLOCK O_NDELAY
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252 #endif
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253
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254 #ifdef ULTRIX
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255 #define setlogmask(x) 0
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256 #endif
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257
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258 /* Backward compatibility for Linux */
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259 #ifndef RECMARK_TIMESTART
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260 #define RECMARK_STARTSEND 1
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261 #define RECMARK_STARTRECV 2
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262 #define RECMARK_ENDSEND 3
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263 #define RECMARK_ENDRECV 4
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264 #define RECMARK_TIMEDELTA32 5
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265 #define RECMARK_TIMEDELTA8 6
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266 #define RECMARK_TIMESTART 7
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267 #endif
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268
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269 /*
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270 * PPP Data Link Layer "protocol" table.
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271 * One entry per supported protocol.
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272 * The last entry must be NULL.
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273 */
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274 struct protent *protocols[] = {
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275 &lcp_protent,
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276 &pap_protent,
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277 &chap_protent,
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278 #ifdef CBCP_SUPPORT
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279 &cbcp_protent,
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280 #endif
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281 &ipcp_protent,
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282 #ifdef INET6
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283 &ipv6cp_protent,
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284 #endif
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285 &ccp_protent,
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286 #ifdef IPX_CHANGE
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287 &ipxcp_protent,
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288 #endif
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289 #ifdef AT_CHANGE
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290 &atcp_protent,
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291 #endif
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292 NULL
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293 };
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294
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295 int
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296 main(argc, argv)
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297 int argc;
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298 char *argv[];
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299 {
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300 int i, fdflags, t;
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301 char *p, *connector;
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302 struct passwd *pw;
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303 struct timeval timo;
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304 struct protent *protp;
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305 struct stat statbuf;
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306 char numbuf[16];
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307
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308 ifname[0] = '\0';
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309 new_phase(PHASE_INITIALIZE);
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310
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311 /*
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312 * Ensure that fds 0, 1, 2 are open, to /dev/null if nowhere else.
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313 * This way we can close 0, 1, 2 in detach() without clobbering
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314 * a fd that we are using.
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315 */
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316 if ((i = open(_PATH_DEVNULL, O_RDWR)) >= 0) {
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317 while (0 <= i && i <= 2)
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318 i = dup(i);
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319 if (i >= 0)
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320 (void) close(i);
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321 }
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322
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323 script_env = NULL;
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324
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325 /* Initialize syslog facilities */
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326 reopen_log();
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327
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328 if (gethostname(hostname, MAXHOSTNAMELEN+1) < 0 ) {
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329 option_error("Couldn't get hostname: %m");
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330 exit(1);
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331 }
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332 hostname[MAXHOSTNAMELEN] = '\0';
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333
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334 /* make sure we don't create world or group writable files. */
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335 (void) umask(umask(0777) | 022);
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336
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337 uid = getuid();
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338 privileged = (uid == 0);
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339 (void) slprintf(numbuf, sizeof(numbuf), "%d", uid);
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340 script_setenv("ORIG_UID", numbuf, 0);
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341
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342 ngroups = getgroups(NGROUPS_MAX, groups);
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343
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344 /*
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345 * Initialize magic number generator now so that protocols may
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346 * use magic numbers in initialization.
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347 */
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348 magic_init();
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349
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350 progname = *argv;
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351 prepass = 0;
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352 /*
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353 * Initialize to the standard option set, then parse, in order, the
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354 * system options file, the user's options file, the tty's options file,
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355 * and the command line arguments. At last, install the options declared
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356 * by each protocol into the extra_option list.
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357 */
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358 for (i = 0; (protp = protocols[i]) != NULL; ++i) {
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359 (*protp->init)(0);
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360 if (protp->options != NULL) {
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361 add_options(protp->options);
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362 }
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363 }
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364
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365 /*
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366 * Install "generic" options into the extra_options list.
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367 */
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368 add_options(auth_options);
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369 add_options(general_options);
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370
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371 /* Install any system-specific options (or remove unusable ones) */
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372 sys_options();
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373
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374 if (!options_from_file(_PATH_SYSOPTIONS, !privileged, 0, 1)
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375 || !options_from_user())
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376 exit(EXIT_OPTION_ERROR);
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377
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378 /* scan command line and options files to find device name */
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379 prepass = 1;
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380 (void) parse_args(argc-1, argv+1);
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381 prepass = 0;
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382
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383 /*
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384 * Work out the device name, if it hasn't already been specified.
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385 */
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386 using_pty = notty || ptycommand != NULL || pty_socket != NULL;
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387 if (!using_pty && default_device && !direct_tty) {
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388 char *p;
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389
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390 if (!isatty(0) || (p = ttyname(0)) == NULL) {
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391 option_error("no device specified and stdin is not a tty");
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392 exit(EXIT_OPTION_ERROR);
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393 }
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394 (void) strlcpy(devnam, p, sizeof(devnam));
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395 if (stat(devnam, &devstat) < 0)
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396 fatal("Couldn't stat default device %s: %m", devnam);
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397 }
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398
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399 /*
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|
400 * Parse the tty options file and the command line.
|
|
|
401 * The per-tty options file should not change
|
|
|
402 * ptycommand, pty_socket, notty or devnam.
|
|
|
403 */
|
|
|
404 devnam_fixed = 1;
|
|
|
405 if (!using_pty && !direct_tty) {
|
|
|
406 if (!options_for_tty())
|
|
|
407 exit(EXIT_OPTION_ERROR);
|
|
|
408 }
|
|
|
409
|
|
|
410 devnam_fixed = 0;
|
|
|
411 if (!parse_args(argc-1, argv+1))
|
|
|
412 exit(EXIT_OPTION_ERROR);
|
|
|
413
|
|
|
414 /*
|
|
|
415 * Check that we are running as root.
|
|
|
416 */
|
|
|
417 if (geteuid() != 0) {
|
|
|
418 option_error("must be root to run %s, since it is not setuid-root",
|
|
|
419 argv[0]);
|
|
|
420 exit(EXIT_NOT_ROOT);
|
|
|
421 }
|
|
|
422
|
|
|
423 if (!ppp_available()) {
|
|
|
424 option_error(no_ppp_msg);
|
|
|
425 exit(EXIT_NO_KERNEL_SUPPORT);
|
|
|
426 }
|
|
|
427
|
|
|
428 /*
|
|
|
429 * Check that the options given are valid and consistent.
|
|
|
430 */
|
|
|
431 if (!sys_check_options())
|
|
|
432 exit(EXIT_OPTION_ERROR);
|
|
|
433 auth_check_options();
|
|
|
434 #ifdef HAVE_MULTILINK
|
|
|
435 mp_check_options();
|
|
|
436 #endif
|
|
|
437 for (i = 0; (protp = protocols[i]) != NULL; ++i)
|
|
|
438 if (protp->enabled_flag && protp->check_options != NULL)
|
|
|
439 (*protp->check_options)();
|
|
|
440 if (demand && (connect_script == NULL)) {
|
|
|
441 option_error("connect script is required for demand-dialling\n");
|
|
|
442 exit(EXIT_OPTION_ERROR);
|
|
|
443 }
|
|
|
444 if (updetach && (nodetach || demand)) {
|
|
|
445 option_error("updetach cannot be used with %s",
|
|
|
446 nodetach ? "nodetach" : "demand");
|
|
|
447 exit(EXIT_OPTION_ERROR);
|
|
|
448 }
|
|
|
449 /* default holdoff to 0 if no connect script has been given */
|
|
|
450 if ((connect_script == NULL) && !holdoff_specified)
|
|
|
451 holdoff = 0;
|
|
|
452
|
|
|
453 if (using_pty || direct_tty) {
|
|
|
454 if (!default_device) {
|
|
|
455 option_error("%s option precludes specifying device name",
|
|
|
456 notty? "notty": "pty");
|
|
|
457 exit(EXIT_OPTION_ERROR);
|
|
|
458 }
|
|
|
459 if (ptycommand != NULL && (notty || direct_tty)) {
|
|
|
460 option_error("pty option is incompatible with notty option");
|
|
|
461 exit(EXIT_OPTION_ERROR);
|
|
|
462 }
|
|
|
463 if (pty_socket != NULL && (ptycommand != NULL || notty ||
|
|
|
464 direct_tty)) {
|
|
|
465 option_error("socket option is incompatible with pty and notty");
|
|
|
466 exit(EXIT_OPTION_ERROR);
|
|
|
467 }
|
|
|
468 default_device = notty || direct_tty;
|
|
|
469 lockflag = 0;
|
|
|
470 modem = 0;
|
|
|
471 if (default_device && log_to_fd <= 1)
|
|
|
472 log_to_fd = -1;
|
|
|
473 } else {
|
|
|
474 /*
|
|
|
475 * If the user has specified a device which is the same as
|
|
|
476 * the one on stdin, pretend they didn't specify any.
|
|
|
477 * If the device is already open read/write on stdin,
|
|
|
478 * we assume we don't need to lock it, and we can open it as root.
|
|
|
479 */
|
|
|
480 if (fstat(0, &statbuf) >= 0 && S_ISCHR(statbuf.st_mode)
|
|
|
481 && statbuf.st_rdev == devstat.st_rdev) {
|
|
|
482 default_device = 1;
|
|
|
483 fdflags = fcntl(0, F_GETFL);
|
|
|
484 if (fdflags != -1 && (fdflags & O_ACCMODE) == O_RDWR)
|
|
|
485 privopen = 1;
|
|
|
486 }
|
|
|
487 }
|
|
|
488 if (default_device)
|
|
|
489 nodetach = 1;
|
|
|
490
|
|
|
491 /*
|
|
|
492 * Don't send log messages to the serial port, it tends to
|
|
|
493 * confuse the peer. :-)
|
|
|
494 */
|
|
|
495 if (log_to_fd >= 0 && fstat(log_to_fd, &statbuf) >= 0
|
|
|
496 && S_ISCHR(statbuf.st_mode) && statbuf.st_rdev == devstat.st_rdev)
|
|
|
497 log_to_fd = -1;
|
|
|
498 early_log = 0;
|
|
|
499
|
|
|
500 if (debug)
|
|
|
501 (void) setlogmask(LOG_UPTO(LOG_DEBUG));
|
|
|
502
|
|
|
503 /*
|
|
|
504 * Initialize system-dependent stuff.
|
|
|
505 */
|
|
|
506 if (check_options_hook != NULL &&
|
|
|
507 (*check_options_hook)(uid) == -1) {
|
|
|
508 exit(EXIT_OPTION_ERROR);
|
|
|
509 }
|
|
|
510 sys_init(!devnam_info.priv && !privopen);
|
|
|
511
|
|
|
512 #ifdef HAVE_MULTILINK
|
|
|
513 pppdb = tdb_open(_PATH_PPPDB, 0, 0, O_RDWR|O_CREAT, 0644);
|
|
|
514 if (pppdb != NULL) {
|
|
|
515 (void) slprintf(db_key, sizeof(db_key), "pppd%d", getpid());
|
|
|
516 update_db_entry();
|
|
|
517 } else {
|
|
|
518 warn("Warning: couldn't open ppp database %s", _PATH_PPPDB);
|
|
|
519 if (multilink) {
|
|
|
520 warn("Warning: disabling multilink");
|
|
|
521 multilink = 0;
|
|
|
522 }
|
|
|
523 }
|
|
|
524 #endif
|
|
|
525
|
|
|
526 /*
|
|
|
527 * Detach ourselves from the terminal, if required, and identify
|
|
|
528 * who is running us. Printing to stderr stops here unless
|
|
|
529 * nodetach or updetach is set.
|
|
|
530 */
|
|
|
531 if (!nodetach && !updetach)
|
|
|
532 detach();
|
|
|
533 p = getlogin();
|
|
|
534 if (p == NULL) {
|
|
|
535 pw = getpwuid(uid);
|
|
|
536 if (pw != NULL && pw->pw_name != NULL)
|
|
|
537 p = pw->pw_name;
|
|
|
538 else
|
|
|
539 p = "(unknown)";
|
|
|
540 }
|
|
|
541 syslog(LOG_NOTICE, "pppd %s.%d%s started by %s, uid %d",
|
|
|
542 VERSION, PATCHLEVEL, IMPLEMENTATION, p, uid);
|
|
|
543 script_setenv("PPPLOGNAME", p, 0);
|
|
|
544
|
|
|
545 if (devnam[0] != '\0')
|
|
|
546 script_setenv("DEVICE", devnam, 1);
|
|
|
547 (void) slprintf(numbuf, sizeof(numbuf), "%d", getpid());
|
|
|
548 script_setenv("PPPD_PID", numbuf, 1);
|
|
|
549
|
|
|
550 setup_signals();
|
|
|
551
|
|
|
552 waiting = 0;
|
|
|
553
|
|
|
554 create_linkpidfile();
|
|
|
555
|
|
|
556 /*
|
|
|
557 * If we're doing dial-on-demand, set up the interface now.
|
|
|
558 */
|
|
|
559 if (demand) {
|
|
|
560 /*
|
|
|
561 * Open the loopback channel and set it up to be the ppp interface.
|
|
|
562 */
|
|
|
563 #ifdef HAVE_MULTILINK
|
|
|
564 (void) tdb_writelock(pppdb);
|
|
|
565 #endif
|
|
|
566 set_ifunit(1);
|
|
|
567 fd_loop = open_ppp_loopback();
|
|
|
568 #ifdef HAVE_MULTILINK
|
|
|
569 (void) tdb_writeunlock(pppdb);
|
|
|
570 #endif
|
|
|
571
|
|
|
572 /*
|
|
|
573 * Configure the interface and mark it up, etc.
|
|
|
574 */
|
|
|
575 demand_conf();
|
|
|
576 }
|
|
|
577
|
|
|
578 new_phase(PHASE_INITIALIZED);
|
|
|
579 do_callback = 0;
|
|
|
580 for (;;) {
|
|
|
581
|
|
|
582 need_holdoff = 1;
|
|
|
583 ttyfd = -1;
|
|
|
584 real_ttyfd = -1;
|
|
|
585 status = EXIT_OK;
|
|
|
586 ++unsuccess;
|
|
|
587 doing_callback = do_callback;
|
|
|
588 do_callback = 0;
|
|
|
589
|
|
|
590 if (demand && !doing_callback) {
|
|
|
591 /*
|
|
|
592 * Don't do anything until we see some activity.
|
|
|
593 */
|
|
|
594 kill_link = 0;
|
|
|
595 new_phase(PHASE_DORMANT);
|
|
|
596 demand_unblock();
|
|
|
597 add_fd(fd_loop);
|
|
|
598 for (;;) {
|
|
|
599 if (sigsetjmp(sigjmp, 1) == 0) {
|
|
|
600 (void) sigprocmask(SIG_BLOCK, &main_sigmask, NULL);
|
|
|
601 if (kill_link || got_sigchld) {
|
|
|
602 (void) sigprocmask(SIG_UNBLOCK, &main_sigmask, NULL);
|
|
|
603 } else {
|
|
|
604 waiting = 1;
|
|
|
605 (void) sigprocmask(SIG_UNBLOCK, &main_sigmask, NULL);
|
|
|
606 wait_input(timeleft(&timo));
|
|
|
607 }
|
|
|
608 }
|
|
|
609 waiting = 0;
|
|
|
610 calltimeout();
|
|
|
611 if (kill_link) {
|
|
|
612 if (!persist)
|
|
|
613 break;
|
|
|
614 kill_link = 0;
|
|
|
615 }
|
|
|
616 if (get_loop_output())
|
|
|
617 break;
|
|
|
618 if (got_sigchld)
|
|
|
619 (void) reap_kids(0);
|
|
|
620 }
|
|
|
621 remove_fd(fd_loop);
|
|
|
622 if (kill_link && !persist)
|
|
|
623 break;
|
|
|
624
|
|
|
625 /*
|
|
|
626 * Now we want to bring up the link.
|
|
|
627 */
|
|
|
628 demand_block();
|
|
|
629 info("Starting link");
|
|
|
630 }
|
|
|
631
|
|
|
632 new_phase(doing_callback ? PHASE_CALLINGBACK : PHASE_SERIALCONN);
|
|
|
633
|
|
|
634 /*
|
|
|
635 * Get a pty master/slave pair if the pty, notty, socket,
|
|
|
636 * or record options were specified.
|
|
|
637 */
|
|
|
638 (void) strlcpy(ppp_devnam, devnam, sizeof(ppp_devnam));
|
|
|
639 pty_master = -1;
|
|
|
640 pty_slave = -1;
|
|
|
641 if (using_pty || record_file != NULL) {
|
|
|
642 if (!get_pty(&pty_master, &pty_slave, ppp_devnam, uid)) {
|
|
|
643 error("Couldn't allocate pseudo-tty");
|
|
|
644 status = EXIT_FATAL_ERROR;
|
|
|
645 goto fail;
|
|
|
646 }
|
|
|
647 set_up_tty(pty_slave, 1);
|
|
|
648 }
|
|
|
649
|
|
|
650 /*
|
|
|
651 * Lock the device if we've been asked to.
|
|
|
652 */
|
|
|
653 status = EXIT_LOCK_FAILED;
|
|
|
654 if (lockflag && !privopen && !direct_tty) {
|
|
|
655 if (lock(devnam) < 0)
|
|
|
656 goto fail;
|
|
|
657 locked = 1;
|
|
|
658 }
|
|
|
659
|
|
|
660 /*
|
|
|
661 * Open the serial device and set it up to be the ppp interface.
|
|
|
662 * First we open it in non-blocking mode so we can set the
|
|
|
663 * various termios flags appropriately. If we aren't dialling
|
|
|
664 * out and we want to use the modem lines, we reopen it later
|
|
|
665 * in order to wait for the carrier detect signal from the modem.
|
|
|
666 */
|
|
|
667 hungup = 0;
|
|
|
668 kill_link = 0;
|
|
|
669 connector = doing_callback? callback_script: connect_script;
|
|
|
670 if (direct_tty) {
|
|
|
671 ttyfd = 0;
|
|
|
672 } else if (devnam[0] != '\0') {
|
|
|
673 for (;;) {
|
|
|
674 /* If the user specified the device name, become the
|
|
|
675 user before opening it. */
|
|
|
676 int err;
|
|
|
677 if (!devnam_info.priv && !privopen)
|
|
|
678 (void) seteuid(uid);
|
|
|
679 if ((ttyfd = sys_extra_fd()) < 0)
|
|
|
680 ttyfd = open(devnam, O_NONBLOCK | O_RDWR);
|
|
|
681 err = errno;
|
|
|
682 if (!devnam_info.priv && !privopen)
|
|
|
683 (void) seteuid(0);
|
|
|
684 if (ttyfd >= 0)
|
|
|
685 break;
|
|
|
686 errno = err;
|
|
|
687 if (err != EINTR) {
|
|
|
688 error("Failed to open %s: %m", devnam);
|
|
|
689 status = EXIT_OPEN_FAILED;
|
|
|
690 }
|
|
|
691 if (!persist || err != EINTR)
|
|
|
692 goto fail;
|
|
|
693 }
|
|
|
694 if ((fdflags = fcntl(ttyfd, F_GETFL)) == -1
|
|
|
695 || fcntl(ttyfd, F_SETFL, fdflags & ~O_NONBLOCK) < 0)
|
|
|
696 warn("Couldn't reset non-blocking mode on device: %m");
|
|
|
697
|
|
|
698 /*
|
|
|
699 * Do the equivalent of `mesg n' to stop broadcast messages.
|
|
|
700 */
|
|
|
701 if (fstat(ttyfd, &statbuf) < 0
|
|
|
702 || fchmod(ttyfd, statbuf.st_mode & ~(S_IWGRP | S_IWOTH)) < 0) {
|
|
|
703 warn("Couldn't restrict write permissions to %s: %m", devnam);
|
|
|
704 } else
|
|
|
705 tty_mode = statbuf.st_mode;
|
|
|
706
|
|
|
707 /*
|
|
|
708 * Set line speed, flow control, etc.
|
|
|
709 * If we have a non-null connection or initializer script,
|
|
|
710 * on most systems we set CLOCAL for now so that we can talk
|
|
|
711 * to the modem before carrier comes up. But this has the
|
|
|
712 * side effect that we might miss it if CD drops before we
|
|
|
713 * get to clear CLOCAL below. On systems where we can talk
|
|
|
714 * successfully to the modem with CLOCAL clear and CD down,
|
|
|
715 * we could clear CLOCAL at this point.
|
|
|
716 */
|
|
|
717 set_up_tty(ttyfd, ((connector != NULL && connector[0] != '\0')
|
|
|
718 || initializer != NULL));
|
|
|
719 real_ttyfd = ttyfd;
|
|
|
720 }
|
|
|
721
|
|
|
722 /*
|
|
|
723 * If the pty, socket, notty and/or record option was specified,
|
|
|
724 * start up the character shunt now.
|
|
|
725 */
|
|
|
726 status = EXIT_PTYCMD_FAILED;
|
|
|
727 if (ptycommand != NULL) {
|
|
|
728 if (record_file != NULL) {
|
|
|
729 int ipipe[2], opipe[2], ok;
|
|
|
730
|
|
|
731 if (pipe(ipipe) < 0 || pipe(opipe) < 0)
|
|
|
732 fatal("Couldn't create pipes for record option: %m");
|
|
|
733 dbglog("starting charshunt for pty option");
|
|
|
734 ok = device_script(ptycommand, opipe[0], ipipe[1], 1,
|
|
|
735 "record") == 0 && start_charshunt(ipipe[0], opipe[1]);
|
|
|
736 (void) close(ipipe[0]);
|
|
|
737 (void) close(ipipe[1]);
|
|
|
738 (void) close(opipe[0]);
|
|
|
739 (void) close(opipe[1]);
|
|
|
740 if (!ok)
|
|
|
741 goto fail;
|
|
|
742 } else {
|
|
|
743 if (device_script(ptycommand, pty_master, pty_master, 1,
|
|
|
744 "pty") < 0)
|
|
|
745 goto fail;
|
|
|
746 ttyfd = pty_slave;
|
|
|
747 (void) close(pty_master);
|
|
|
748 pty_master = -1;
|
|
|
749 }
|
|
|
750 } else if (pty_socket != NULL) {
|
|
|
751 int fd = open_socket(pty_socket);
|
|
|
752 if (fd < 0)
|
|
|
753 goto fail;
|
|
|
754 dbglog("starting charshunt for socket option");
|
|
|
755 if (!start_charshunt(fd, fd))
|
|
|
756 goto fail;
|
|
|
757 } else if (notty) {
|
|
|
758 dbglog("starting charshunt for notty option");
|
|
|
759 if (!start_charshunt(0, 1))
|
|
|
760 goto fail;
|
|
|
761 } else if (record_file != NULL) {
|
|
|
762 dbglog("starting charshunt for record option");
|
|
|
763 if (!start_charshunt(ttyfd, ttyfd))
|
|
|
764 goto fail;
|
|
|
765 }
|
|
|
766
|
|
|
767 /* run connection script */
|
|
|
768 if (((connector != NULL) && (connector[0] != '\0')) || initializer) {
|
|
|
769 if (real_ttyfd != -1) {
|
|
|
770 /* XXX do this if doing_callback == CALLBACK_DIALIN? */
|
|
|
771 if (!default_device && modem && !direct_tty) {
|
|
|
772 setdtr(real_ttyfd, 0); /* in case modem is off hook */
|
|
|
773 (void) sleep(1);
|
|
|
774 setdtr(real_ttyfd, 1);
|
|
|
775 }
|
|
|
776 }
|
|
|
777
|
|
|
778 if ((initializer != NULL) && (initializer[0] != '\0')) {
|
|
|
779 if (device_script(initializer, ttyfd, ttyfd, 0, "init") < 0) {
|
|
|
780 error("Initializer script failed");
|
|
|
781 status = EXIT_INIT_FAILED;
|
|
|
782 goto fail;
|
|
|
783 }
|
|
|
784 if (kill_link)
|
|
|
785 goto disconnect;
|
|
|
786
|
|
|
787 info("Serial port initialized.");
|
|
|
788 }
|
|
|
789
|
|
|
790 if ((connector != NULL) && (connector[0] != '\0')) {
|
|
|
791 if (device_script(connector, ttyfd, ttyfd, 0, "connect") < 0) {
|
|
|
792 error("Connect script failed");
|
|
|
793 status = EXIT_CONNECT_FAILED;
|
|
|
794 goto fail;
|
|
|
795 }
|
|
|
796 if (kill_link)
|
|
|
797 goto disconnect;
|
|
|
798
|
|
|
799 info("Serial connection established.");
|
|
|
800 }
|
|
|
801
|
|
|
802 /*
|
|
|
803 * Clear CLOCAL if modem option -- we now have carrier
|
|
|
804 * established, and we should respect loss of carrier.
|
|
|
805 */
|
|
|
806 if (real_ttyfd != -1)
|
|
|
807 set_up_tty(real_ttyfd, 0);
|
|
|
808
|
|
|
809 if (doing_callback == CALLBACK_DIALIN)
|
|
|
810 connector = NULL;
|
|
|
811 }
|
|
|
812
|
|
|
813 /* reopen tty if necessary to wait for carrier */
|
|
|
814 if (connector == NULL && modem && devnam[0] != '\0' && !direct_tty) {
|
|
|
815 for (;;) {
|
|
|
816 if ((i = open(devnam, O_RDWR)) >= 0)
|
|
|
817 break;
|
|
|
818 if (errno != EINTR) {
|
|
|
819 error("Failed to reopen %s: %m", devnam);
|
|
|
820 status = EXIT_OPEN_FAILED;
|
|
|
821 }
|
|
|
822 if (!persist || errno != EINTR || hungup || kill_link)
|
|
|
823 goto fail;
|
|
|
824 }
|
|
|
825 (void) close(i);
|
|
|
826 }
|
|
|
827
|
|
|
828 (void) slprintf(numbuf, sizeof(numbuf), "%d", baud_rate);
|
|
|
829 script_setenv("SPEED", numbuf, 0);
|
|
|
830
|
|
|
831 /* run welcome script, if any */
|
|
|
832 if ((welcomer != NULL) && (welcomer[0] != '\0')) {
|
|
|
833 if (device_script(welcomer, ttyfd, ttyfd, 0, "welcome") < 0)
|
|
|
834 warn("Welcome script failed");
|
|
|
835 }
|
|
|
836
|
|
|
837 /* set up the serial device as a ppp interface */
|
|
|
838 #ifdef HAVE_MULTILINK
|
|
|
839 (void) tdb_writelock(pppdb);
|
|
|
840 #endif
|
|
|
841 fd_ppp = establish_ppp(ttyfd);
|
|
|
842 if (fd_ppp < 0) {
|
|
|
843 #ifdef HAVE_MULTILINK
|
|
|
844 (void) tdb_writeunlock(pppdb);
|
|
|
845 #endif
|
|
|
846 status = EXIT_FATAL_ERROR;
|
|
|
847 goto disconnect;
|
|
|
848 }
|
|
|
849
|
|
|
850 if (!demand && ifunit >= 0)
|
|
|
851 set_ifunit(1);
|
|
|
852 #ifdef HAVE_MULTILINK
|
|
|
853 (void) tdb_writeunlock(pppdb);
|
|
|
854 #endif
|
|
|
855
|
|
|
856 /*
|
|
|
857 * Start opening the connection and wait for
|
|
|
858 * incoming events (reply, timeout, etc.).
|
|
|
859 */
|
|
|
860 notice("Connect: %s <--> %s", ifname, ppp_devnam);
|
|
|
861 (void) gettimeofday(&start_time, NULL);
|
|
|
862 link_stats_valid = 0;
|
|
|
863 script_unsetenv("CONNECT_TIME");
|
|
|
864 script_unsetenv("BYTES_SENT");
|
|
|
865 script_unsetenv("BYTES_RCVD");
|
|
|
866 lcp_lowerup(0);
|
|
|
867
|
|
|
868 /* Mostly for accounting purposes */
|
|
|
869 new_phase(PHASE_CONNECTED);
|
|
|
870
|
|
|
871 /*
|
|
|
872 * If we are initiating this connection, wait for a short
|
|
|
873 * time for something from the peer. This can avoid bouncing
|
|
|
874 * our packets off his tty before he has it set up.
|
|
|
875 */
|
|
|
876 add_fd(fd_ppp);
|
|
|
877 if (connect_delay != 0 && (connector != NULL || ptycommand != NULL)) {
|
|
|
878 struct timeval t;
|
|
|
879 t.tv_sec = connect_delay / 1000;
|
|
|
880 t.tv_usec = connect_delay % 1000;
|
|
|
881 wait_input(&t);
|
|
|
882 }
|
|
|
883
|
|
|
884 lcp_open(0); /* Start protocol */
|
|
|
885 open_ccp_flag = 0;
|
|
|
886 status = EXIT_NEGOTIATION_FAILED;
|
|
|
887 new_phase(PHASE_ESTABLISH);
|
|
|
888 while (phase != PHASE_DEAD) {
|
|
|
889 if (sigsetjmp(sigjmp, 1) == 0) {
|
|
|
890 (void) sigprocmask(SIG_BLOCK, &main_sigmask, NULL);
|
|
|
891 if (kill_link || open_ccp_flag || got_sigchld) {
|
|
|
892 (void) sigprocmask(SIG_UNBLOCK, &main_sigmask, NULL);
|
|
|
893 } else {
|
|
|
894 waiting = 1;
|
|
|
895 (void) sigprocmask(SIG_UNBLOCK, &main_sigmask, NULL);
|
|
|
896 wait_input(timeleft(&timo));
|
|
|
897 }
|
|
|
898 }
|
|
|
899 waiting = 0;
|
|
|
900 calltimeout();
|
|
|
901 get_input();
|
|
|
902 if (kill_link) {
|
|
|
903 lcp_close(0, "User request");
|
|
|
904 kill_link = 0;
|
|
|
905 }
|
|
|
906 if (open_ccp_flag) {
|
|
|
907 if (phase == PHASE_NETWORK || phase == PHASE_RUNNING) {
|
|
|
908 /* Uncloak ourselves. */
|
|
|
909 ccp_fsm[0].flags &= ~OPT_SILENT;
|
|
|
910 (*ccp_protent.open)(0);
|
|
|
911 }
|
|
|
912 open_ccp_flag = 0;
|
|
|
913 }
|
|
|
914 if (got_sigchld)
|
|
|
915 (void) reap_kids(0); /* Don't leave dead kids lying around */
|
|
|
916 }
|
|
|
917
|
|
|
918 /*
|
|
|
919 * Print connect time and statistics.
|
|
|
920 */
|
|
|
921 if (link_stats_valid) {
|
|
|
922 int t = (link_connect_time + 5) / 6; /* 1/10ths of minutes */
|
|
|
923 info("Connect time %d.%d minutes.", t/10, t%10);
|
|
|
924 info("Sent %" PPP_COUNTER_F " bytes (%" PPP_COUNTER_F
|
|
|
925 " packets), received %" PPP_COUNTER_F " bytes (%" PPP_COUNTER_F
|
|
|
926 " packets).",
|
|
|
927 link_stats.bytes_out, link_stats.pkts_out,
|
|
|
928 link_stats.bytes_in, link_stats.pkts_in);
|
|
|
929 }
|
|
|
930
|
|
|
931 /*
|
|
|
932 * Delete pid file before disestablishing ppp. Otherwise it
|
|
|
933 * can happen that another pppd gets the same unit and then
|
|
|
934 * we delete its pid file.
|
|
|
935 */
|
|
|
936 if (!demand) {
|
|
|
937 if (pidfilename[0] != '\0'
|
|
|
938 && unlink(pidfilename) < 0 && errno != ENOENT)
|
|
|
939 warn("unable to delete pid file %s: %m", pidfilename);
|
|
|
940 pidfilename[0] = '\0';
|
|
|
941 }
|
|
|
942
|
|
|
943 /*
|
|
|
944 * If we may want to bring the link up again, transfer
|
|
|
945 * the ppp unit back to the loopback. Set the
|
|
|
946 * real serial device back to its normal mode of operation.
|
|
|
947 */
|
|
|
948 remove_fd(fd_ppp);
|
|
|
949 clean_check();
|
|
|
950 if (demand)
|
|
|
951 restore_loop();
|
|
|
952 disestablish_ppp(ttyfd);
|
|
|
953 fd_ppp = -1;
|
|
|
954 if (!hungup)
|
|
|
955 lcp_lowerdown(0);
|
|
|
956 if (!demand)
|
|
|
957 script_unsetenv("IFNAME");
|
|
|
958
|
|
|
959 /*
|
|
|
960 * Run disconnector script, if requested.
|
|
|
961 * XXX we may not be able to do this if the line has hung up!
|
|
|
962 */
|
|
|
963 disconnect:
|
|
|
964 if ((disconnect_script != NULL) && (disconnect_script[0] != '\0') &&
|
|
|
965 !hungup) {
|
|
|
966 new_phase(PHASE_DISCONNECT);
|
|
|
967 if (real_ttyfd >= 0)
|
|
|
968 set_up_tty(real_ttyfd, 1);
|
|
|
969 if (device_script(disconnect_script, ttyfd, ttyfd, 0,
|
|
|
970 "disconnect") < 0) {
|
|
|
971 warn("disconnect script failed");
|
|
|
972 } else {
|
|
|
973 info("Serial link disconnected.");
|
|
|
974 }
|
|
|
975 }
|
|
|
976
|
|
|
977 fail:
|
|
|
978 if (pty_master >= 0)
|
|
|
979 (void) close(pty_master);
|
|
|
980 if (pty_slave >= 0) {
|
|
|
981 (void) close(pty_slave);
|
|
|
982 pty_slave = -1;
|
|
|
983 }
|
|
|
984 if (real_ttyfd >= 0)
|
|
|
985 close_tty();
|
|
|
986 if (locked) {
|
|
|
987 locked = 0;
|
|
|
988 unlock();
|
|
|
989 }
|
|
|
990
|
|
|
991 if (!demand) {
|
|
|
992 if (pidfilename[0] != '\0'
|
|
|
993 && unlink(pidfilename) < 0 && errno != ENOENT)
|
|
|
994 warn("unable to delete pid file %s: %m", pidfilename);
|
|
|
995 pidfilename[0] = '\0';
|
|
|
996 }
|
|
|
997
|
|
|
998 if (!persist || (maxfail > 0 && unsuccess >= maxfail))
|
|
|
999 break;
|
|
|
1000
|
|
|
1001 kill_link = 0;
|
|
|
1002 if (demand)
|
|
|
1003 demand_discard();
|
|
|
1004 t = need_holdoff? holdoff: 0;
|
|
|
1005 if (holdoff_hook != NULL)
|
|
|
1006 t = (*holdoff_hook)();
|
|
|
1007 if (t > 0) {
|
|
|
1008 new_phase(PHASE_HOLDOFF);
|
|
|
1009 TIMEOUT(holdoff_end, NULL, t);
|
|
|
1010 do {
|
|
|
1011 if (sigsetjmp(sigjmp, 1) == 0) {
|
|
|
1012 (void) sigprocmask(SIG_BLOCK, &main_sigmask, NULL);
|
|
|
1013 if (kill_link || got_sigchld) {
|
|
|
1014 (void) sigprocmask(SIG_UNBLOCK, &main_sigmask, NULL);
|
|
|
1015 } else {
|
|
|
1016 waiting = 1;
|
|
|
1017 (void) sigprocmask(SIG_UNBLOCK, &main_sigmask, NULL);
|
|
|
1018 wait_input(timeleft(&timo));
|
|
|
1019 }
|
|
|
1020 }
|
|
|
1021 waiting = 0;
|
|
|
1022 calltimeout();
|
|
|
1023 if (kill_link) {
|
|
|
1024 kill_link = 0;
|
|
|
1025 new_phase(PHASE_DORMANT); /* allow signal to end holdoff */
|
|
|
1026 }
|
|
|
1027 if (got_sigchld)
|
|
|
1028 (void) reap_kids(0);
|
|
|
1029 } while (phase == PHASE_HOLDOFF);
|
|
|
1030 if (!persist)
|
|
|
1031 break;
|
|
|
1032 }
|
|
|
1033 }
|
|
|
1034
|
|
|
1035 /* Wait for scripts to finish */
|
|
|
1036 final_reap();
|
|
|
1037
|
|
|
1038 die(status);
|
|
|
1039 return (0);
|
|
|
1040 }
|
|
|
1041
|
|
|
1042 /*
|
|
|
1043 * setup_signals - initialize signal handling.
|
|
|
1044 */
|
|
|
1045 static void
|
|
|
1046 setup_signals()
|
|
|
1047 {
|
|
|
1048 struct sigaction sa;
|
|
|
1049
|
|
|
1050 /*
|
|
|
1051 * Compute mask of all interesting signals and install signal handlers
|
|
|
1052 * for each. Only one signal handler may be active at a time. Therefore,
|
|
|
1053 * all other signals should be masked when any handler is executing.
|
|
|
1054 */
|
|
|
1055 (void) sigemptyset(&main_sigmask);
|
|
|
1056 (void) sigaddset(&main_sigmask, SIGHUP);
|
|
|
1057 (void) sigaddset(&main_sigmask, SIGINT);
|
|
|
1058 (void) sigaddset(&main_sigmask, SIGTERM);
|
|
|
1059 (void) sigaddset(&main_sigmask, SIGCHLD);
|
|
|
1060 (void) sigaddset(&main_sigmask, SIGUSR2);
|
|
|
1061
|
|
|
1062 #define SIGNAL(s, handler) if (1) { \
|
|
|
1063 sa.sa_handler = handler; \
|
|
|
1064 if (sigaction(s, &sa, NULL) < 0) \
|
|
|
1065 fatal("Couldn't establish signal handler (%d): %m", s); \
|
|
|
1066 } else ((void)0)
|
|
|
1067
|
|
|
1068 sa.sa_mask = main_sigmask;
|
|
|
1069 sa.sa_flags = 0;
|
|
|
1070 /*CONSTANTCONDITION*/ SIGNAL(SIGHUP, hup); /* Hangup */
|
|
|
1071 /*CONSTANTCONDITION*/ SIGNAL(SIGINT, term); /* Interrupt */
|
|
|
1072 /*CONSTANTCONDITION*/ SIGNAL(SIGTERM, term); /* Terminate */
|
|
|
1073 /*CONSTANTCONDITION*/ SIGNAL(SIGCHLD, chld);
|
|
|
1074
|
|
|
1075 /*CONSTANTCONDITION*/ SIGNAL(SIGUSR1, toggle_debug); /* Toggle debug flag */
|
|
|
1076 /*CONSTANTCONDITION*/ SIGNAL(SIGUSR2, open_ccp); /* Reopen CCP */
|
|
|
1077
|
|
|
1078 /*
|
|
|
1079 * Install a handler for other signals which would otherwise
|
|
|
1080 * cause pppd to exit without cleaning up.
|
|
|
1081 */
|
|
|
1082 /*CONSTANTCONDITION*/ SIGNAL(SIGABRT, bad_signal);
|
|
|
1083 /*CONSTANTCONDITION*/ SIGNAL(SIGALRM, bad_signal);
|
|
|
1084 /*CONSTANTCONDITION*/ SIGNAL(SIGFPE, bad_signal);
|
|
|
1085 /*CONSTANTCONDITION*/ SIGNAL(SIGILL, bad_signal);
|
|
|
1086 /*CONSTANTCONDITION*/ SIGNAL(SIGPIPE, bad_signal);
|
|
|
1087 /*CONSTANTCONDITION*/ SIGNAL(SIGQUIT, bad_signal);
|
|
|
1088 #ifndef DEBUG
|
|
|
1089 /*CONSTANTCONDITION*/ SIGNAL(SIGSEGV, bad_signal);
|
|
|
1090 #endif
|
|
|
1091 #ifdef SIGBUS
|
|
|
1092 /*CONSTANTCONDITION*/ SIGNAL(SIGBUS, bad_signal);
|
|
|
1093 #endif
|
|
|
1094 #ifdef SIGEMT
|
|
|
1095 /*CONSTANTCONDITION*/ SIGNAL(SIGEMT, bad_signal);
|
|
|
1096 #endif
|
|
|
1097 #ifdef SIGPOLL
|
|
|
1098 /*CONSTANTCONDITION*/ SIGNAL(SIGPOLL, bad_signal);
|
|
|
1099 #endif
|
|
|
1100 #ifdef SIGPROF
|
|
|
1101 /*CONSTANTCONDITION*/ SIGNAL(SIGPROF, bad_signal);
|
|
|
1102 #endif
|
|
|
1103 #ifdef SIGSYS
|
|
|
1104 /*CONSTANTCONDITION*/ SIGNAL(SIGSYS, bad_signal);
|
|
|
1105 #endif
|
|
|
1106 #ifdef SIGTRAP
|
|
|
1107 /*CONSTANTCONDITION*/ SIGNAL(SIGTRAP, bad_signal);
|
|
|
1108 #endif
|
|
|
1109 #ifdef SIGVTALRM
|
|
|
1110 /*CONSTANTCONDITION*/ SIGNAL(SIGVTALRM, bad_signal);
|
|
|
1111 #endif
|
|
|
1112 #ifdef SIGXCPU
|
|
|
1113 /*CONSTANTCONDITION*/ SIGNAL(SIGXCPU, bad_signal);
|
|
|
1114 #endif
|
|
|
1115 #ifdef SIGXFSZ
|
|
|
1116 /*CONSTANTCONDITION*/ SIGNAL(SIGXFSZ, bad_signal);
|
|
|
1117 #endif
|
|
|
1118
|
|
|
1119 /*
|
|
|
1120 * Apparently we can get a SIGPIPE when we call syslog, if
|
|
|
1121 * syslogd has died and been restarted. Ignoring it seems
|
|
|
1122 * be sufficient.
|
|
|
1123 */
|
|
|
1124 (void) signal(SIGPIPE, SIG_IGN);
|
|
|
1125 }
|
|
|
1126
|
|
|
1127 /*
|
|
|
1128 * set_ifunit - do things we need to do once we know which ppp
|
|
|
1129 * unit we are using.
|
|
|
1130 */
|
|
|
1131 void
|
|
|
1132 set_ifunit(iskey)
|
|
|
1133 int iskey;
|
|
|
1134 {
|
|
|
1135 sys_ifname();
|
|
|
1136 info("Using interface %s", ifname);
|
|
|
1137 script_setenv("IFNAME", ifname, iskey);
|
|
|
1138 if (iskey) {
|
|
|
1139 create_pidfile(); /* write pid to file */
|
|
|
1140 create_linkpidfile();
|
|
|
1141 }
|
|
|
1142 }
|
|
|
1143
|
|
|
1144 /*
|
|
|
1145 * detach - detach us from the controlling terminal.
|
|
|
1146 */
|
|
|
1147 void
|
|
|
1148 detach()
|
|
|
1149 {
|
|
|
1150 pid_t pid;
|
|
|
1151 char numbuf[16];
|
|
|
1152
|
|
|
1153 if (detached)
|
|
|
1154 return;
|
|
|
1155 if ((pid = fork()) == (pid_t)-1) {
|
|
|
1156 error("Couldn't detach (fork failed: %m)");
|
|
|
1157 die(1); /* or just return? */
|
|
|
1158 }
|
|
|
1159 if (pid != (pid_t)0) {
|
|
|
1160 /* parent */
|
|
|
1161 if (locked)
|
|
|
1162 (void) relock(pid);
|
|
|
1163 exit(0); /* parent dies */
|
|
|
1164 }
|
|
|
1165 (void) setsid();
|
|
|
1166 /*
|
|
|
1167 * Fork again to relinquish session leadership. This is needed
|
|
|
1168 * to prevent the daemon from acquiring controlling terminal.
|
|
|
1169 */
|
|
|
1170 if ((pid = fork()) == (pid_t)-1) {
|
|
|
1171 error("Couldn't detach (second fork failed: %m)");
|
|
|
1172 die(1); /* or just return? */
|
|
|
1173 }
|
|
|
1174 if (pid != (pid_t)0) {
|
|
|
1175 /* parent */
|
|
|
1176 if (locked)
|
|
|
1177 (void) relock(pid);
|
|
|
1178 exit(0); /* parent dies */
|
|
|
1179 }
|
|
|
1180 (void) chdir("/");
|
|
|
1181 (void) close(0);
|
|
|
1182 (void) close(1);
|
|
|
1183 (void) close(2);
|
|
|
1184 detached = 1;
|
|
|
1185 if (!log_to_file && !log_to_specific_fd)
|
|
|
1186 log_to_fd = -1;
|
|
|
1187 /* update pid files if they have been written already */
|
|
|
1188 if (pidfilename[0] != '\0')
|
|
|
1189 create_pidfile();
|
|
|
1190 if (linkpidfile[0] != '\0')
|
|
|
1191 create_linkpidfile();
|
|
|
1192 (void) slprintf(numbuf, sizeof(numbuf), "%d", getpid());
|
|
|
1193 script_setenv("PPPD_PID", numbuf, 1);
|
|
|
1194 }
|
|
|
1195
|
|
|
1196 /*
|
|
|
1197 * reopen_log - (re)open our connection to syslog.
|
|
|
1198 */
|
|
|
1199 void
|
|
|
1200 reopen_log()
|
|
|
1201 {
|
|
|
1202 #ifdef ULTRIX
|
|
|
1203 openlog("pppd", LOG_PID);
|
|
|
1204 #else
|
|
|
1205 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
|
|
|
1206 (void) setlogmask(LOG_UPTO(LOG_INFO));
|
|
|
1207 #endif
|
|
|
1208 }
|
|
|
1209
|
|
|
1210 /*
|
|
|
1211 * Create a file containing our process ID.
|
|
|
1212 */
|
|
|
1213 static void
|
|
|
1214 create_pidfile()
|
|
|
1215 {
|
|
|
1216 FILE *pidfile;
|
|
|
1217
|
|
|
1218 (void) slprintf(pidfilename, sizeof(pidfilename), "%s%s.pid",
|
|
|
1219 _PATH_VARRUN, ifname);
|
|
|
1220 if ((pidfile = fopen(pidfilename, "w")) != NULL) {
|
|
|
1221 (void) fprintf(pidfile, "%u\n", (unsigned)getpid());
|
|
|
1222 (void) fclose(pidfile);
|
|
|
1223 } else {
|
|
|
1224 error("Failed to create pid file %s: %m", pidfilename);
|
|
|
1225 pidfilename[0] = '\0';
|
|
|
1226 }
|
|
|
1227 }
|
|
|
1228
|
|
|
1229 static void
|
|
|
1230 create_linkpidfile()
|
|
|
1231 {
|
|
|
1232 FILE *pidfile;
|
|
|
1233
|
|
|
1234 if (linkname[0] == '\0')
|
|
|
1235 return;
|
|
|
1236 script_setenv("LINKNAME", linkname, 1);
|
|
|
1237 (void) slprintf(linkpidfile, sizeof(linkpidfile), "%sppp-%s.pid",
|
|
|
1238 _PATH_VARRUN, linkname);
|
|
|
1239 if ((pidfile = fopen(linkpidfile, "w")) != NULL) {
|
|
|
1240 (void) fprintf(pidfile, "%u\n", (unsigned)getpid());
|
|
|
1241 if (ifname[0] != '\0')
|
|
|
1242 (void) fprintf(pidfile, "%s\n", ifname);
|
|
|
1243 (void) fclose(pidfile);
|
|
|
1244 } else {
|
|
|
1245 error("Failed to create pid file %s: %m", linkpidfile);
|
|
|
1246 linkpidfile[0] = '\0';
|
|
|
1247 }
|
|
|
1248 }
|
|
|
1249
|
|
|
1250 /*
|
|
|
1251 * holdoff_end - called via a timeout when the holdoff period ends.
|
|
|
1252 */
|
|
|
1253 /*ARGSUSED*/
|
|
|
1254 static void
|
|
|
1255 holdoff_end(arg)
|
|
|
1256 void *arg;
|
|
|
1257 {
|
|
|
1258 new_phase(PHASE_DORMANT);
|
|
|
1259 }
|
|
|
1260
|
|
|
1261 /* List of protocol names, to make our messages a little more informative. */
|
|
|
1262 struct protocol_list {
|
|
|
1263 u_short proto;
|
|
|
1264 const char *name;
|
|
|
1265 } protocol_list[] = {
|
|
|
1266 { 0x21, "IP" },
|
|
|
1267 { 0x23, "OSI Network Layer" },
|
|
|
1268 { 0x25, "Xerox NS IDP" },
|
|
|
1269 { 0x27, "DECnet Phase IV" },
|
|
|
1270 { 0x29, "Appletalk" },
|
|
|
1271 { 0x2b, "Novell IPX" },
|
|
|
1272 { 0x2d, "VJ compressed TCP/IP" },
|
|
|
1273 { 0x2f, "VJ uncompressed TCP/IP" },
|
|
|
1274 { 0x31, "Bridging PDU" },
|
|
|
1275 { 0x33, "Stream Protocol ST-II" },
|
|
|
1276 { 0x35, "Banyan Vines" },
|
|
|
1277 { 0x37, "Old VJ compressed TCP/IP" },
|
|
|
1278 { 0x39, "AppleTalk EDDP" },
|
|
|
1279 { 0x3b, "AppleTalk SmartBuffered" },
|
|
|
1280 { 0x3d, "Multilink" },
|
|
|
1281 { 0x3f, "NetBIOS Frame" },
|
|
|
1282 { 0x41, "Cisco LAN Extension" },
|
|
|
1283 { 0x43, "Ascom Timeplex" },
|
|
|
1284 { 0x45, "Fujitsu Link Backup and Load Balancing (LBLB)" },
|
|
|
1285 { 0x47, "DCA Remote Lan" },
|
|
|
1286 { 0x49, "Serial Data Transport Protocol (PPP-SDTP)" },
|
|
|
1287 { 0x4b, "SNA over 802.2" },
|
|
|
1288 { 0x4d, "SNA" },
|
|
|
1289 { 0x4f, "IP6 Header Compression" },
|
|
|
1290 { 0x51, "KNX Bridging" },
|
|
|
1291 { 0x53, "Encrypted" },
|
|
|
1292 { 0x55, "per-link encrypted" },
|
|
|
1293 { 0x57, "IPv6" },
|
|
|
1294 { 0x59, "PPP Muxing" },
|
|
|
1295 { 0x6f, "Stampede Bridging" },
|
|
|
1296 { 0x73, "MP+" },
|
|
|
1297 { 0xc1, "STMF" },
|
|
|
1298 { 0xfb, "per-link compressed" },
|
|
|
1299 { 0xfd, "compressed datagram" },
|
|
|
1300 { 0x0201, "802.1d Hello Packets" },
|
|
|
1301 { 0x0203, "IBM Source Routing BPDU" },
|
|
|
1302 { 0x0205, "DEC LANBridge100 Spanning Tree" },
|
|
|
1303 { 0x0207, "Cisco Discovery Protocol" },
|
|
|
1304 { 0x0231, "Luxcom" },
|
|
|
1305 { 0x0233, "Sigma Network Systems" },
|
|
|
1306 { 0x0235, "Apple Client Server Protocol" },
|
|
|
1307 { 0x0281, "MPLS Unicast" },
|
|
|
1308 { 0x0283, "MPLS Multicast" },
|
|
|
1309 { 0x0285, "IEEE p1284.4" },
|
|
|
1310 { 0x0287, "ETSI TETRA TNP1" },
|
|
|
1311 { 0x4021, "Stacker LZS" },
|
|
|
1312 { 0x8021, "Internet Protocol Control Protocol" },
|
|
|
1313 { 0x8023, "OSI Network Layer Control Protocol" },
|
|
|
1314 { 0x8025, "Xerox NS IDP Control Protocol" },
|
|
|
1315 { 0x8027, "DECnet Phase IV Control Protocol" },
|
|
|
1316 { 0x8029, "Appletalk Control Protocol" },
|
|
|
1317 { 0x802b, "Novell IPX Control Protocol" },
|
|
|
1318 { 0x8031, "Bridging Control Protocol" },
|
|
|
1319 { 0x8033, "Stream Protocol Control Protocol" },
|
|
|
1320 { 0x8035, "Banyan Vines Control Protocol" },
|
|
|
1321 { 0x803f, "NetBIOS Frames Control Protocol" },
|
|
|
1322 { 0x8041, "Cisco LAN Extension Control Protocol" },
|
|
|
1323 { 0x8043, "Ascom Timeplex Control Protocol" },
|
|
|
1324 { 0x8045, "Fujitsu LBLB Control Protocol" },
|
|
|
1325 { 0x8047, "DCA Remote Lan Network Control Protocol (RLNCP)" },
|
|
|
1326 { 0x8049, "Serial Data Control Protocol (PPP-SDCP)" },
|
|
|
1327 { 0x804b, "SNA over 802.2 Control Protocol" },
|
|
|
1328 { 0x804d, "SNA Control Protocol" },
|
|
|
1329 { 0x8051, "KNX Bridging Control Protocol" },
|
|
|
1330 { 0x8053, "Encryption Control Protocol" },
|
|
|
1331 { 0x8055, "Per-link Encryption Control Protocol" },
|
|
|
1332 { 0x8057, "IPv6 Control Protocol" },
|
|
|
1333 { 0x806f, "Stampede Bridging Control Protocol" },
|
|
|
1334 { 0x80c1, "STMF Control Protocol" },
|
|
|
1335 { 0x80fb, "Per-link Compression Control Protocol" },
|
|
|
1336 { 0x80fd, "Compression Control Protocol" },
|
|
|
1337 { 0x8207, "Cisco Discovery Control Protocol" },
|
|
|
1338 { 0x8235, "Apple Client Server Control Protocol" },
|
|
|
1339 { 0x8281, "MPLS Control Protocol" },
|
|
|
1340 { 0x8287, "ETSI TETRA TNP1 Control Protocol" },
|
|
|
1341 { 0xc021, "Link Control Protocol" },
|
|
|
1342 { 0xc023, "Password Authentication Protocol" },
|
|
|
1343 { 0xc025, "Link Quality Report" },
|
|
|
1344 { 0xc027, "Shiva Password Authentication Protocol" },
|
|
|
1345 { 0xc029, "CallBack Control Protocol (CBCP)" },
|
|
|
1346 { 0xc02b, "Bandwidth Allocation Control Protocol" },
|
|
|
1347 { 0xc02d, "BAP" },
|
|
|
1348 { 0xc081, "Container Control Protocol" },
|
|
|
1349 { 0xc223, "Challenge Handshake Authentication Protocol" },
|
|
|
1350 { 0xc227, "Extensible Authentication Protocol" },
|
|
|
1351 { 0xc281, "Funk Proprietary Authentication Protocol" },
|
|
|
1352 { 0, NULL },
|
|
|
1353 };
|
|
|
1354
|
|
|
1355 /*
|
|
|
1356 * protocol_name - find a name for a PPP protocol.
|
|
|
1357 */
|
|
|
1358 const char *
|
|
|
1359 protocol_name(proto)
|
|
|
1360 int proto;
|
|
|
1361 {
|
|
|
1362 struct protocol_list *lp;
|
|
|
1363
|
|
|
1364 for (lp = protocol_list; lp->proto != 0; ++lp)
|
|
|
1365 if (proto == lp->proto)
|
|
|
1366 return (lp->name);
|
|
|
1367 return (NULL);
|
|
|
1368 }
|
|
|
1369
|
|
|
1370 static const char *phase_names[] = { PHASE__NAMES };
|
|
|
1371
|
|
|
1372 const char *
|
|
|
1373 phase_name(pval)
|
|
|
1374 int pval;
|
|
|
1375 {
|
|
|
1376 static char buf[32];
|
|
|
1377
|
|
|
1378 if (pval < 0 || pval >= Dim(phase_names)) {
|
|
|
1379 (void) slprintf(buf, sizeof (buf), "unknown %d", pval);
|
|
|
1380 return ((const char *)buf);
|
|
|
1381 }
|
|
|
1382 return (phase_names[pval]);
|
|
|
1383 }
|
|
|
1384
|
|
|
1385 /*
|
|
|
1386 * get_input - called when incoming data is available.
|
|
|
1387 */
|
|
|
1388 static void
|
|
|
1389 get_input()
|
|
|
1390 {
|
|
|
1391 int len, i;
|
|
|
1392 u_char *p;
|
|
|
1393 u_short protocol;
|
|
|
1394 struct protent *protp;
|
|
|
1395 const char *pname;
|
|
|
1396
|
|
|
1397 p = inpacket_buf; /* point to beginning of packet buffer */
|
|
|
1398
|
|
|
1399 len = read_packet(inpacket_buf);
|
|
|
1400 if (len < 0)
|
|
|
1401 return;
|
|
|
1402
|
|
|
1403 if (len == 0) {
|
|
|
1404 notice("Modem hangup");
|
|
|
1405 hungup = 1;
|
|
|
1406 status = EXIT_HANGUP;
|
|
|
1407 lcp_lowerdown(0); /* serial link is no longer available */
|
|
|
1408 link_terminated(0);
|
|
|
1409 return;
|
|
|
1410 }
|
|
|
1411
|
|
|
1412 if (debug /*&& (debugflags & DBG_INPACKET)*/)
|
|
|
1413 dbglog("rcvd %P", p, len);
|
|
|
1414
|
|
|
1415 if (len < PPP_HDRLEN) {
|
|
|
1416 dbglog("Discarded short packet (%d < %d)", len, PPP_HDRLEN);
|
|
|
1417 return;
|
|
|
1418 }
|
|
|
1419
|
|
|
1420 p += 2; /* Skip address and control */
|
|
|
1421 GETSHORT(protocol, p);
|
|
|
1422 len -= PPP_HDRLEN;
|
|
|
1423
|
|
|
1424 pname = debug ? NULL : protocol_name(protocol);
|
|
|
1425
|
|
|
1426 /*
|
|
|
1427 * Toss all non-LCP packets unless LCP is in Opened state and
|
|
|
1428 * discard non-authentication protocols if we're not yet
|
|
|
1429 * authenticated.
|
|
|
1430 */
|
|
|
1431 if ((protocol != PPP_LCP &&
|
|
|
1432 (phase < PHASE_AUTHENTICATE || phase > PHASE_RUNNING)) ||
|
|
|
1433 (phase <= PHASE_AUTHENTICATE &&
|
|
|
1434 !(protocol == PPP_LCP || protocol == PPP_LQR ||
|
|
|
1435 protocol == PPP_PAP || protocol == PPP_CHAP))) {
|
|
|
1436 if (pname == NULL)
|
|
|
1437 dbglog("Discarded proto 0x%x in %s phase",
|
|
|
1438 protocol, phase_name(phase));
|
|
|
1439 else
|
|
|
1440 dbglog("Discarded %s (0x%x) in %s phase",
|
|
|
1441 pname, protocol, phase_name(phase));
|
|
|
1442 return;
|
|
|
1443 }
|
|
|
1444
|
|
|
1445 /*
|
|
|
1446 * Upcall the proper protocol input routine.
|
|
|
1447 */
|
|
|
1448 for (i = 0; (protp = protocols[i]) != NULL; ++i) {
|
|
|
1449 if (protp->protocol == protocol && protp->enabled_flag) {
|
|
|
1450 (*protp->input)(0, p, len);
|
|
|
1451 return;
|
|
|
1452 }
|
|
|
1453 if (protocol == (protp->protocol & ~0x8000) && protp->enabled_flag
|
|
|
1454 && protp->datainput != NULL) {
|
|
|
1455 (*protp->datainput)(0, p, len);
|
|
|
1456 return;
|
|
|
1457 }
|
|
|
1458 }
|
|
|
1459
|
|
|
1460 if (debug) {
|
|
|
1461 if (pname != NULL)
|
|
|
1462 warn("Unsupported protocol '%s' (0x%x) received", pname, protocol);
|
|
|
1463 else
|
|
|
1464 warn("Unsupported protocol 0x%x received", protocol);
|
|
|
1465 }
|
|
|
1466 lcp_sprotrej(0, p - PPP_HDRLEN, len + PPP_HDRLEN);
|
|
|
1467 }
|
|
|
1468
|
|
|
1469 /*
|
|
|
1470 * new_phase - signal the start of a new phase of pppd's operation.
|
|
|
1471 */
|
|
|
1472 void
|
|
|
1473 new_phase(p)
|
|
|
1474 int p;
|
|
|
1475 {
|
|
|
1476 if (new_phase_hook != NULL)
|
|
|
1477 (*new_phase_hook)(p, phase);
|
|
|
1478 phase = p;
|
|
|
1479 }
|
|
|
1480
|
|
|
1481 /*
|
|
|
1482 * die - clean up state and exit with the specified status.
|
|
|
1483 */
|
|
|
1484 void
|
|
|
1485 die(status)
|
|
|
1486 int status;
|
|
|
1487 {
|
|
|
1488 cleanup();
|
|
|
1489 if (phase != PHASE_EXIT) {
|
|
|
1490 syslog(LOG_INFO, "Exit.");
|
|
|
1491 new_phase(PHASE_EXIT);
|
|
|
1492 }
|
|
|
1493 exit(status);
|
|
|
1494 }
|
|
|
1495
|
|
|
1496 /*
|
|
|
1497 * cleanup - restore anything which needs to be restored before we exit
|
|
|
1498 */
|
|
|
1499 static void
|
|
|
1500 cleanup()
|
|
|
1501 {
|
|
|
1502 sys_cleanup(); /* XXX: Need to check if this is okay after close_tty */
|
|
|
1503
|
|
|
1504 if (fd_ppp >= 0) {
|
|
|
1505 fd_ppp = -1;
|
|
|
1506 disestablish_ppp(ttyfd);
|
|
|
1507 }
|
|
|
1508 if (real_ttyfd >= 0)
|
|
|
1509 close_tty();
|
|
|
1510
|
|
|
1511 if (pidfilename[0] != '\0' && unlink(pidfilename) < 0 && errno != ENOENT)
|
|
|
1512 warn("unable to delete pid file %s: %m", pidfilename);
|
|
|
1513 pidfilename[0] = '\0';
|
|
|
1514 if (linkpidfile[0] != '\0' && unlink(linkpidfile) < 0 && errno != ENOENT)
|
|
|
1515 warn("unable to delete pid file %s: %m", linkpidfile);
|
|
|
1516 linkpidfile[0] = '\0';
|
|
|
1517
|
|
|
1518 if (locked) {
|
|
|
1519 locked = 0;
|
|
|
1520 unlock();
|
|
|
1521 }
|
|
|
1522
|
|
|
1523 #ifdef HAVE_MULTILINK
|
|
|
1524 if (pppdb != NULL) {
|
|
|
1525 cleanup_db();
|
|
|
1526 pppdb = NULL;
|
|
|
1527 }
|
|
|
1528 #endif
|
|
|
1529 }
|
|
|
1530
|
|
|
1531 /*
|
|
|
1532 * close_tty - restore the terminal device and close it.
|
|
|
1533 */
|
|
|
1534 static void
|
|
|
1535 close_tty()
|
|
|
1536 {
|
|
|
1537 int fd = real_ttyfd;
|
|
|
1538
|
|
|
1539 real_ttyfd = -1;
|
|
|
1540
|
|
|
1541 /* drop dtr to hang up */
|
|
|
1542 if (!default_device && modem) {
|
|
|
1543 setdtr(fd, 0);
|
|
|
1544 /*
|
|
|
1545 * This sleep is in case the serial port has CLOCAL set by default,
|
|
|
1546 * and consequently will reassert DTR when we close the device.
|
|
|
1547 */
|
|
|
1548 (void) sleep(1);
|
|
|
1549 }
|
|
|
1550
|
|
|
1551 restore_tty(fd);
|
|
|
1552
|
|
|
1553 if (tty_mode != (mode_t) -1) {
|
|
|
1554 if (fchmod(fd, tty_mode) != 0) {
|
|
|
1555 /* XXX if devnam is a symlink, this will change the link */
|
|
|
1556 if (chmod(devnam, tty_mode) != 0) {
|
|
|
1557 error("Unable to chmod file %s: %m", devnam);
|
|
|
1558 }
|
|
|
1559 }
|
|
|
1560 }
|
|
|
1561
|
|
|
1562 (void) close(fd);
|
|
|
1563 }
|
|
|
1564
|
|
|
1565 /*
|
|
|
1566 * update_link_stats - get stats at link termination.
|
|
|
1567 */
|
|
|
1568 void
|
|
|
1569 update_link_stats(u)
|
|
|
1570 int u;
|
|
|
1571 {
|
|
|
1572 struct timeval now;
|
|
|
1573 char numbuf[32];
|
|
|
1574
|
|
|
1575 if (gettimeofday(&now, NULL) >= 0) {
|
|
|
1576 link_connect_time = now.tv_sec - start_time.tv_sec;
|
|
|
1577 (void) slprintf(numbuf, sizeof(numbuf), "%d", link_connect_time);
|
|
|
1578 script_setenv("CONNECT_TIME", numbuf, 0);
|
|
|
1579 } else {
|
|
|
1580 link_connect_time = 0;
|
|
|
1581 }
|
|
|
1582
|
|
|
1583 if (get_ppp_stats(u, &link_stats)) {
|
|
|
1584 (void) slprintf(numbuf, sizeof(numbuf), "%" PPP_COUNTER_F,
|
|
|
1585 link_stats.bytes_out);
|
|
|
1586 script_setenv("BYTES_SENT", numbuf, 0);
|
|
|
1587 (void) slprintf(numbuf, sizeof(numbuf), "%" PPP_COUNTER_F,
|
|
|
1588 link_stats.bytes_in);
|
|
|
1589 script_setenv("BYTES_RCVD", numbuf, 0);
|
|
|
1590 (void) slprintf(numbuf, sizeof(numbuf), "%" PPP_COUNTER_F,
|
|
|
1591 link_stats.pkts_in);
|
|
|
1592 script_setenv("PKTS_RCVD", numbuf, 0);
|
|
|
1593 (void) slprintf(numbuf, sizeof(numbuf), "%" PPP_COUNTER_F,
|
|
|
1594 link_stats.pkts_out);
|
|
|
1595 script_setenv("PKTS_SENT", numbuf, 0);
|
|
|
1596 link_stats_valid = 1;
|
|
|
1597 }
|
|
|
1598 }
|
|
|
1599
|
|
|
1600
|
|
|
1601 struct callout {
|
|
|
1602 struct timeval c_time; /* time at which to call routine */
|
|
|
1603 void *c_arg; /* argument to routine */
|
|
|
1604 void (*c_func) __P((void *)); /* routine */
|
|
|
1605 struct callout *c_next;
|
|
|
1606 };
|
|
|
1607
|
|
|
1608 static struct callout *callout = NULL; /* Callout list */
|
|
|
1609 static struct timeval timenow; /* Current time */
|
|
|
1610
|
|
|
1611 /*
|
|
|
1612 * timeout - Schedule a timeout.
|
|
|
1613 *
|
|
|
1614 * Note that this timeout takes the number of seconds, NOT hz (as in
|
|
|
1615 * the kernel).
|
|
|
1616 */
|
|
|
1617 void
|
|
|
1618 timeout(func, arg, time)
|
|
|
1619 void (*func) __P((void *));
|
|
|
1620 void *arg;
|
|
|
1621 int time;
|
|
|
1622 {
|
|
|
1623 struct callout *newp, *p, **pp;
|
|
|
1624
|
|
|
1625 MAINDEBUG(("Timeout %p:%p in %d seconds.", func, arg, time));
|
|
|
1626
|
|
|
1627 /*
|
|
|
1628 * Allocate timeout.
|
|
|
1629 */
|
|
|
1630 if ((newp = (struct callout *) malloc(sizeof(struct callout))) == NULL)
|
|
|
1631 novm("callout structure for timeout.");
|
|
|
1632 newp->c_arg = arg;
|
|
|
1633 newp->c_func = func;
|
|
|
1634 (void) gettimeofday(&timenow, NULL);
|
|
|
1635 newp->c_time.tv_sec = timenow.tv_sec + time;
|
|
|
1636 newp->c_time.tv_usec = timenow.tv_usec;
|
|
|
1637
|
|
|
1638 /*
|
|
|
1639 * Find correct place and link it in.
|
|
|
1640 */
|
|
|
1641 for (pp = &callout; (p = *pp) != NULL; pp = &p->c_next)
|
|
|
1642 if (newp->c_time.tv_sec < p->c_time.tv_sec
|
|
|
1643 || (newp->c_time.tv_sec == p->c_time.tv_sec
|
|
|
1644 && newp->c_time.tv_usec < p->c_time.tv_usec))
|
|
|
1645 break;
|
|
|
1646 newp->c_next = p;
|
|
|
1647 *pp = newp;
|
|
|
1648 }
|
|
|
1649
|
|
|
1650
|
|
|
1651 /*
|
|
|
1652 * untimeout - Unschedule a timeout.
|
|
|
1653 */
|
|
|
1654 void
|
|
|
1655 untimeout(func, arg)
|
|
|
1656 void (*func) __P((void *));
|
|
|
1657 void *arg;
|
|
|
1658 {
|
|
|
1659 struct callout **copp, *freep;
|
|
|
1660
|
|
|
1661 MAINDEBUG(("Untimeout %p:%p.", func, arg));
|
|
|
1662
|
|
|
1663 /*
|
|
|
1664 * Find first matching timeout and remove it from the list.
|
|
|
1665 */
|
|
|
1666 for (copp = &callout; (freep = *copp) != NULL; copp = &freep->c_next)
|
|
|
1667 if (freep->c_func == func && freep->c_arg == arg) {
|
|
|
1668 *copp = freep->c_next;
|
|
|
1669 free((char *) freep);
|
|
|
1670 break;
|
|
|
1671 }
|
|
|
1672 }
|
|
|
1673
|
|
|
1674
|
|
|
1675 /*
|
|
|
1676 * calltimeout - Call any timeout routines which are now due.
|
|
|
1677 */
|
|
|
1678 static void
|
|
|
1679 calltimeout()
|
|
|
1680 {
|
|
|
1681 struct callout *p;
|
|
|
1682
|
|
|
1683 while (callout != NULL) {
|
|
|
1684 p = callout;
|
|
|
1685
|
|
|
1686 if (gettimeofday(&timenow, NULL) < 0)
|
|
|
1687 fatal("Failed to get time of day: %m");
|
|
|
1688 if (!(p->c_time.tv_sec < timenow.tv_sec
|
|
|
1689 || (p->c_time.tv_sec == timenow.tv_sec
|
|
|
1690 && p->c_time.tv_usec <= timenow.tv_usec)))
|
|
|
1691 break; /* no, it's not time yet */
|
|
|
1692
|
|
|
1693 callout = p->c_next;
|
|
|
1694 (*p->c_func)(p->c_arg);
|
|
|
1695
|
|
|
1696 free((char *) p);
|
|
|
1697 }
|
|
|
1698 }
|
|
|
1699
|
|
|
1700
|
|
|
1701 /*
|
|
|
1702 * timeleft - return the length of time until the next timeout is due.
|
|
|
1703 */
|
|
|
1704 static struct timeval *
|
|
|
1705 timeleft(tvp)
|
|
|
1706 struct timeval *tvp;
|
|
|
1707 {
|
|
|
1708 if (callout == NULL)
|
|
|
1709 return (NULL);
|
|
|
1710
|
|
|
1711 (void) gettimeofday(&timenow, NULL);
|
|
|
1712 tvp->tv_sec = callout->c_time.tv_sec - timenow.tv_sec;
|
|
|
1713 tvp->tv_usec = callout->c_time.tv_usec - timenow.tv_usec;
|
|
|
1714 if (tvp->tv_usec < 0) {
|
|
|
1715 tvp->tv_usec += 1000000;
|
|
|
1716 tvp->tv_sec -= 1;
|
|
|
1717 }
|
|
|
1718 if (tvp->tv_sec < 0)
|
|
|
1719 tvp->tv_sec = tvp->tv_usec = 0;
|
|
|
1720
|
|
|
1721 return (tvp);
|
|
|
1722 }
|
|
|
1723
|
|
|
1724
|
|
|
1725 /*
|
|
|
1726 * kill_my_pg - send a signal to our process group, and ignore it ourselves.
|
|
|
1727 */
|
|
|
1728 static void
|
|
|
1729 kill_my_pg(sig)
|
|
|
1730 int sig;
|
|
|
1731 {
|
|
|
1732 struct sigaction act, oldact;
|
|
|
1733 sigset_t mask;
|
|
|
1734
|
|
|
1735 BZERO(&act, sizeof (act));
|
|
|
1736 act.sa_handler = SIG_IGN;
|
|
|
1737 (void) sigemptyset(&mask);
|
|
|
1738 (void) sigaddset(&mask, sig);
|
|
|
1739 /*
|
|
|
1740 * Ignore signal 'sig' temporarily, before finally re-activating the
|
|
|
1741 * original handler. We need to do it in the following sequence, since
|
|
|
1742 * otherwise the signal handler for 'sig' will be called forever.
|
|
|
1743 */
|
|
|
1744 if (sigaction(sig, &act, &oldact) < 0) {
|
|
|
1745 fatal("kill_my_pg: couldn't establish signal handler (%d): %m", sig);
|
|
|
1746 }
|
|
|
1747 (void) sigprocmask(SIG_UNBLOCK, &mask, NULL);
|
|
|
1748 /*
|
|
|
1749 * Send signal 'sig' to all processes whose process group ID is equal
|
|
|
1750 * to the process group ID of the sender.
|
|
|
1751 */
|
|
|
1752 (void) kill(0, sig);
|
|
|
1753 if (sigaction(sig, &oldact, NULL) < 0) {
|
|
|
1754 fatal("kill_my_pg: couldn't establish signal handler (%d): %m", sig);
|
|
|
1755 }
|
|
|
1756 }
|
|
|
1757
|
|
|
1758
|
|
|
1759 /*
|
|
|
1760 * hup - Catch SIGHUP signal.
|
|
|
1761 *
|
|
|
1762 * Indicates that the physical layer has been disconnected.
|
|
|
1763 * We don't rely on this indication; if the user has sent this
|
|
|
1764 * signal, we just take the link down.
|
|
|
1765 */
|
|
|
1766 static void
|
|
|
1767 hup(sig)
|
|
|
1768 int sig;
|
|
|
1769 {
|
|
|
1770 info("Hangup (SIGHUP)");
|
|
|
1771 kill_link = 1;
|
|
|
1772 if (status != EXIT_HANGUP)
|
|
|
1773 status = EXIT_USER_REQUEST;
|
|
|
1774 if (conn_running > 0)
|
|
|
1775 /* Send the signal to the [dis]connector process(es) also */
|
|
|
1776 kill_my_pg(sig);
|
|
|
1777 if (charshunt_pid)
|
|
|
1778 (void) kill(charshunt_pid, sig);
|
|
|
1779 if (waiting)
|
|
|
1780 siglongjmp(sigjmp, 1);
|
|
|
1781 }
|
|
|
1782
|
|
|
1783
|
|
|
1784 /*
|
|
|
1785 * term - Catch SIGTERM signal and SIGINT signal (^C/del).
|
|
|
1786 *
|
|
|
1787 * Indicates that we should initiate a graceful disconnect and exit.
|
|
|
1788 */
|
|
|
1789 /*ARGSUSED*/
|
|
|
1790 static void
|
|
|
1791 term(sig)
|
|
|
1792 int sig;
|
|
|
1793 {
|
|
|
1794 info("Terminating on signal %d.", sig);
|
|
|
1795 persist = 0; /* don't try to restart */
|
|
|
1796 kill_link = 1;
|
|
|
1797 status = EXIT_USER_REQUEST;
|
|
|
1798 if (conn_running > 0)
|
|
|
1799 /* Send the signal to the [dis]connector process(es) also */
|
|
|
1800 kill_my_pg(sig);
|
|
|
1801 if (charshunt_pid)
|
|
|
1802 (void) kill(charshunt_pid, sig);
|
|
|
1803 if (waiting)
|
|
|
1804 siglongjmp(sigjmp, 1);
|
|
|
1805 }
|
|
|
1806
|
|
|
1807
|
|
|
1808 /*
|
|
|
1809 * chld - Catch SIGCHLD signal.
|
|
|
1810 * Sets a flag so we will call reap_kids in the mainline.
|
|
|
1811 */
|
|
|
1812 /*ARGSUSED*/
|
|
|
1813 static void
|
|
|
1814 chld(sig)
|
|
|
1815 int sig;
|
|
|
1816 {
|
|
|
1817 got_sigchld = 1;
|
|
|
1818 if (waiting)
|
|
|
1819 siglongjmp(sigjmp, 1);
|
|
|
1820 }
|
|
|
1821
|
|
|
1822 /*
|
|
|
1823 * toggle_debug - Catch SIGUSR1 signal.
|
|
|
1824 *
|
|
|
1825 * Toggle debug flag.
|
|
|
1826 */
|
|
|
1827 /*ARGSUSED*/
|
|
|
1828 static void
|
|
|
1829 toggle_debug(sig)
|
|
|
1830 int sig;
|
|
|
1831 {
|
|
|
1832 if (debug) {
|
|
|
1833 print_ncpstate(0, NULL);
|
|
|
1834 dbglog("debug logging disabled");
|
|
|
1835 (void) setlogmask(LOG_UPTO(LOG_WARNING));
|
|
|
1836 debug = 0;
|
|
|
1837 } else {
|
|
|
1838 (void) setlogmask(LOG_UPTO(LOG_DEBUG));
|
|
|
1839 dbglog("debug logging enabled");
|
|
|
1840 print_ncpstate(0, NULL);
|
|
|
1841 debug = 1;
|
|
|
1842 }
|
|
|
1843 }
|
|
|
1844
|
|
|
1845
|
|
|
1846 /*
|
|
|
1847 * open_ccp - Catch SIGUSR2 signal.
|
|
|
1848 *
|
|
|
1849 * Try to (re)negotiate compression.
|
|
|
1850 */
|
|
|
1851 /*ARGSUSED*/
|
|
|
1852 static void
|
|
|
1853 open_ccp(sig)
|
|
|
1854 int sig;
|
|
|
1855 {
|
|
|
1856 open_ccp_flag = 1;
|
|
|
1857 if (waiting)
|
|
|
1858 siglongjmp(sigjmp, 1);
|
|
|
1859 }
|
|
|
1860
|
|
|
1861
|
|
|
1862 /*
|
|
|
1863 * bad_signal - We've caught a fatal signal. Clean up state and exit.
|
|
|
1864 */
|
|
|
1865 static void
|
|
|
1866 bad_signal(sig)
|
|
|
1867 int sig;
|
|
|
1868 {
|
|
|
1869 static int crashed = 0;
|
|
|
1870
|
|
|
1871 if (crashed)
|
|
|
1872 _exit(127);
|
|
|
1873 crashed = 1;
|
|
|
1874 error("Fatal signal %d", sig);
|
|
|
1875 if (conn_running > 0)
|
|
|
1876 kill_my_pg(SIGTERM);
|
|
|
1877 if (charshunt_pid)
|
|
|
1878 (void) kill(charshunt_pid, SIGTERM);
|
|
|
1879 die(127);
|
|
|
1880 }
|
|
|
1881
|
|
|
1882
|
|
|
1883 /*
|
|
|
1884 * device_script - run a program to talk to the serial device
|
|
|
1885 * (e.g. to run the connector or disconnector script).
|
|
|
1886 */
|
|
|
1887 static int
|
|
|
1888 device_script(program, in, out, dont_wait, optname)
|
|
|
1889 char *program;
|
|
|
1890 int in, out;
|
|
|
1891 int dont_wait;
|
|
|
1892 char *optname;
|
|
|
1893 {
|
|
|
1894 pid_t pid;
|
|
|
1895 int status = -1;
|
|
|
1896 int errfd;
|
|
|
1897 int envpipe[2];
|
|
|
1898
|
|
|
1899 envpipe[0] = envpipe[1] = -1;
|
|
|
1900 if (!dont_wait && device_pipe_hook != NULL && pipe(envpipe) == -1) {
|
|
|
1901 error("Cannot create pipe for child: %m");
|
|
|
1902 return (-1);
|
|
|
1903 }
|
|
|
1904
|
|
|
1905 ++conn_running;
|
|
|
1906 pid = fork();
|
|
|
1907
|
|
|
1908 if (pid == (pid_t)-1) {
|
|
|
1909 --conn_running;
|
|
|
1910 error("Failed to create child process: %m");
|
|
|
1911 return (-1);
|
|
|
1912 }
|
|
|
1913
|
|
|
1914 if (pid == (pid_t)0) {
|
|
|
1915 sys_close();
|
|
|
1916 closelog();
|
|
|
1917 if (envpipe[0] >= 0) {
|
|
|
1918 if (envpipe[1] <= 2)
|
|
|
1919 envpipe[1] = dup(envpipe[1]);
|
|
|
1920 (void) close(envpipe[0]);
|
|
|
1921 }
|
|
|
1922 if (in == 2) {
|
|
|
1923 /* aargh!!! */
|
|
|
1924 int newin = dup(in);
|
|
|
1925 if (in == out)
|
|
|
1926 out = newin;
|
|
|
1927 in = newin;
|
|
|
1928 } else if (out == 2) {
|
|
|
1929 out = dup(out);
|
|
|
1930 }
|
|
|
1931 if (log_to_fd >= 0) {
|
|
|
1932 if (log_to_fd != 2) {
|
|
|
1933 if (dup2(log_to_fd, 2) < 0)
|
|
|
1934 error("dup2(log_to_fd, STDERR) failed: %m");
|
|
|
1935 }
|
|
|
1936 } else {
|
|
|
1937 (void) close(2);
|
|
|
1938 errfd = open(_PATH_CONNERRS, O_WRONLY | O_APPEND | O_CREAT, 0600);
|
|
|
1939 if (errfd >= 0 && errfd != 2) {
|
|
|
1940 if (dup2(errfd, 2) < 0)
|
|
|
1941 error("dup2(errfd, STDERR) failed: %m");
|
|
|
1942 (void) close(errfd);
|
|
|
1943 }
|
|
|
1944 }
|
|
|
1945 if (in != 0) {
|
|
|
1946 if (out == 0)
|
|
|
1947 out = dup(out);
|
|
|
1948 if (dup2(in, 0) < 0)
|
|
|
1949 error("dup2(in, STDIN) failed: %m");
|
|
|
1950 }
|
|
|
1951 if (out != 1) {
|
|
|
1952 if (dup2(out, 1) < 0)
|
|
|
1953 error("dup2(out, STDOUT) failed: %m");
|
|
|
1954 }
|
|
|
1955 if (envpipe[0] >= 0 && dup2(envpipe[1], 3) < 0)
|
|
|
1956 error("dup2(pipe, pipeout) failed: %m");
|
|
|
1957 if (real_ttyfd > 2)
|
|
|
1958 (void) close(real_ttyfd);
|
|
|
1959 if (pty_master > 2)
|
|
|
1960 (void) close(pty_master);
|
|
|
1961 if (pty_slave > 2) {
|
|
|
1962 (void) close(pty_slave);
|
|
|
1963 pty_slave = -1;
|
|
|
1964 }
|
|
|
1965 (void) setuid(uid);
|
|
|
1966 if (getuid() != uid) {
|
|
|
1967 error("setuid failed");
|
|
|
1968 exit(1);
|
|
|
1969 }
|
|
|
1970 (void) setgid(getgid());
|
|
|
1971 if (script_env != NULL) {
|
|
|
1972 while (*script_env != NULL) {
|
|
|
1973 if (putenv(*script_env) == -1)
|
|
|
1974 warn("unable to set %s for %s: %m", *script_env, program);
|
|
|
1975 script_env++;
|
|
|
1976 }
|
|
|
1977 }
|
|
|
1978 (void) execl("/bin/sh", "sh", "-c", program, (char *)0);
|
|
|
1979 error("could not exec /bin/sh: %m");
|
|
|
1980 exit(99);
|
|
|
1981 /* NOTREACHED */
|
|
|
1982 }
|
|
|
1983
|
|
|
1984 if (debug)
|
|
|
1985 dbglog("%s option: '%s' started (pid %d)", optname, program, pid);
|
|
|
1986 if (dont_wait) {
|
|
|
1987 record_child(pid, program, NULL, NULL);
|
|
|
1988 status = 0;
|
|
|
1989 } else {
|
|
|
1990 if (envpipe[0] >= 0) {
|
|
|
1991 (void) close(envpipe[1]);
|
|
|
1992 (*device_pipe_hook)(envpipe[0]);
|
|
|
1993 }
|
|
|
1994 while (waitpid(pid, &status, 0) < 0) {
|
|
|
1995 if (errno == EINTR)
|
|
|
1996 continue;
|
|
|
1997 fatal("error waiting for (dis)connection process: %m");
|
|
|
1998 }
|
|
|
1999 if (envpipe[0] >= 0)
|
|
|
2000 (void) close(envpipe[0]);
|
|
|
2001 --conn_running;
|
|
|
2002 }
|
|
|
2003
|
|
|
2004 return (status == 0 ? 0 : -1);
|
|
|
2005 }
|
|
|
2006
|
|
|
2007
|
|
|
2008 /*
|
|
|
2009 * run-program - execute a program with given arguments,
|
|
|
2010 * but don't wait for it.
|
|
|
2011 * If the program can't be executed, logs an error unless
|
|
|
2012 * must_exist is 0 and the program file doesn't exist.
|
|
|
2013 * Returns -1 if it couldn't fork, 0 if the file doesn't exist
|
|
|
2014 * or isn't an executable plain file, or the process ID of the child.
|
|
|
2015 * If done != NULL, (*done)(arg, int) will be called later (within
|
|
|
2016 * reap_kids) if this routine returns value > 0.
|
|
|
2017 */
|
|
|
2018 pid_t
|
|
|
2019 run_program(prog, args, must_exist, done, arg)
|
|
|
2020 char *prog;
|
|
|
2021 char **args;
|
|
|
2022 int must_exist;
|
|
|
2023 void (*done) __P((void *arg, int status));
|
|
|
2024 void *arg;
|
|
|
2025 {
|
|
|
2026 pid_t pid;
|
|
|
2027 struct stat sbuf;
|
|
|
2028 int retv;
|
|
|
2029
|
|
|
2030 /*
|
|
|
2031 * First check if the file exists and is executable.
|
|
|
2032 * We don't use access() because that would use the
|
|
|
2033 * real user-id, which might not be root, and the script
|
|
|
2034 * might be accessible only to root.
|
|
|
2035 */
|
|
|
2036 errno = EINVAL;
|
|
|
2037 if (stat(prog, &sbuf) < 0 || !S_ISREG(sbuf.st_mode)
|
|
|
2038 || (sbuf.st_mode & (S_IXUSR|S_IXGRP|S_IXOTH)) == 0) {
|
|
|
2039 if (must_exist || errno != ENOENT)
|
|
|
2040 warn("Can't execute %s: %m", prog);
|
|
|
2041 return (0);
|
|
|
2042 }
|
|
|
2043
|
|
|
2044 if (updown_script_hook != NULL) {
|
|
|
2045 retv = (*updown_script_hook)((const char ***)&args);
|
|
|
2046 if (retv == -1) {
|
|
|
2047 return (-1);
|
|
|
2048 }
|
|
|
2049 }
|
|
|
2050
|
|
|
2051 pid = fork();
|
|
|
2052 if (pid == (pid_t)-1) {
|
|
|
2053 error("Failed to create child process for %s: %m", prog);
|
|
|
2054 return (-1);
|
|
|
2055 }
|
|
|
2056 if (pid == (pid_t)0) {
|
|
|
2057 int new_fd;
|
|
|
2058
|
|
|
2059 /* Leave the current location */
|
|
|
2060 (void) setsid(); /* No controlling tty. */
|
|
|
2061 (void) umask (S_IRWXG|S_IRWXO);
|
|
|
2062 (void) chdir ("/"); /* no current directory. */
|
|
|
2063 (void) setuid(0); /* set real UID = root */
|
|
|
2064 (void) setgid(getegid());
|
|
|
2065
|
|
|
2066 /* Ensure that nothing of our device environment is inherited. */
|
|
|
2067 sys_close();
|
|
|
2068 closelog();
|
|
|
2069 (void) close(0);
|
|
|
2070 (void) close(1);
|
|
|
2071 (void) close(2);
|
|
|
2072 (void) close(ttyfd); /* tty interface to the ppp device */
|
|
|
2073 if (real_ttyfd >= 0)
|
|
|
2074 (void) close(real_ttyfd);
|
|
|
2075
|
|
|
2076 /* Don't pass handles to the PPP device, even by accident. */
|
|
|
2077 new_fd = open (_PATH_DEVNULL, O_RDWR);
|
|
|
2078 if (new_fd >= 0) {
|
|
|
2079 if (new_fd != 0) {
|
|
|
2080 if (dup2(new_fd, 0) < 0) /* stdin <- /dev/null */
|
|
|
2081 error("dup2(/dev/null, STDIN) failed: %m");
|
|
|
2082 (void) close(new_fd);
|
|
|
2083 }
|
|
|
2084 if (dup2(0, 1) < 0) /* stdout -> /dev/null */
|
|
|
2085 error("dup2(/dev/null, STDOUT) failed: %m");
|
|
|
2086 if (dup2(0, 2) < 0) /* stderr -> /dev/null */
|
|
|
2087 error("dup2(/dev/null, STDERR) failed: %m");
|
|
|
2088 }
|
|
|
2089
|
|
|
2090 #ifdef BSD
|
|
|
2091 /* Force the priority back to zero if pppd is running higher. */
|
|
|
2092 if (setpriority (PRIO_PROCESS, 0, 0) < 0)
|
|
|
2093 warn("can't reset priority to 0: %m");
|
|
|
2094 #endif
|
|
|
2095
|
|
|
2096 /* SysV recommends a second fork at this point. */
|
|
|
2097
|
|
|
2098 /* run the program */
|
|
|
2099 (void) execve(prog, args, script_env);
|
|
|
2100 if (must_exist || errno != ENOENT) {
|
|
|
2101 /* have to reopen the log, there's nowhere else
|
|
|
2102 for the message to go. */
|
|
|
2103 reopen_log();
|
|
|
2104 syslog(LOG_ERR, "Can't execute %s: %m", prog);
|
|
|
2105 closelog();
|
|
|
2106 }
|
|
|
2107 _exit(-1);
|
|
|
2108 }
|
|
|
2109
|
|
|
2110 if (debug)
|
|
|
2111 dbglog("Script %s started (pid %d)", prog, pid);
|
|
|
2112 record_child(pid, prog, done, arg);
|
|
|
2113
|
|
|
2114 return (pid);
|
|
|
2115 }
|
|
|
2116
|
|
|
2117
|
|
|
2118 /*
|
|
|
2119 * record_child - add a child process to the list for reap_kids
|
|
|
2120 * to use.
|
|
|
2121 */
|
|
|
2122 static void
|
|
|
2123 record_child(pid, prog, done, arg)
|
|
|
2124 pid_t pid;
|
|
|
2125 char *prog;
|
|
|
2126 void (*done) __P((void *, int));
|
|
|
2127 void *arg;
|
|
|
2128 {
|
|
|
2129 struct subprocess *chp;
|
|
|
2130
|
|
|
2131 ++n_children;
|
|
|
2132
|
|
|
2133 chp = (struct subprocess *) malloc(sizeof(struct subprocess));
|
|
|
2134 if (chp == NULL) {
|
|
|
2135 warn("losing track of %s process", prog);
|
|
|
2136 } else {
|
|
|
2137 chp->pid = pid;
|
|
|
2138 chp->prog = prog;
|
|
|
2139 chp->done = done;
|
|
|
2140 chp->arg = arg;
|
|
|
2141 chp->next = children;
|
|
|
2142 children = chp;
|
|
|
2143 }
|
|
|
2144 }
|
|
|
2145
|
|
|
2146
|
|
|
2147 /*
|
|
|
2148 * reap_kids - get status from any dead child processes,
|
|
|
2149 * and log a message for abnormal terminations.
|
|
|
2150 */
|
|
|
2151 static int
|
|
|
2152 reap_kids(waitfor)
|
|
|
2153 int waitfor;
|
|
|
2154 {
|
|
|
2155 pid_t pid;
|
|
|
2156 int status, i;
|
|
|
2157 struct subprocess *chp, **prevp;
|
|
|
2158
|
|
|
2159 got_sigchld = 0;
|
|
|
2160 if (n_children == 0)
|
|
|
2161 return (0);
|
|
|
2162
|
|
|
2163 /*CONSTANTCONDITION*/
|
|
|
2164 while (1) {
|
|
|
2165 pid = waitpid(-1, &status, (waitfor ? 0 : WNOHANG));
|
|
|
2166 if (pid == 0) {
|
|
|
2167 break; /* return 0 */
|
|
|
2168 } else if (pid == -1) {
|
|
|
2169 if (errno == EINTR)
|
|
|
2170 continue;
|
|
|
2171 if (errno != ECHILD)
|
|
|
2172 error("Error waiting for child process: %m");
|
|
|
2173 return (-1);
|
|
|
2174 } else {
|
|
|
2175 for (prevp = &children; (chp = *prevp) != NULL;
|
|
|
2176 prevp = &chp->next) {
|
|
|
2177 if (chp->pid == pid) {
|
|
|
2178 --n_children;
|
|
|
2179 *prevp = chp->next;
|
|
|
2180 break;
|
|
|
2181 }
|
|
|
2182 }
|
|
|
2183 if (WIFSIGNALED(status) || WIFSTOPPED(status)) {
|
|
|
2184 i = WIFSIGNALED(status) ? WTERMSIG(status) : WSTOPSIG(status);
|
|
|
2185 warn("Child process %s (pid %d) %s with signal %d (%s)",
|
|
|
2186 (chp != NULL ? chp->prog : "??"), pid,
|
|
|
2187 (WIFSIGNALED(status) ? "terminated" : "stopped"),
|
|
|
2188 i, signal_name(i));
|
|
|
2189 } else if (debug) {
|
|
|
2190 dbglog("Child process %s finished (pid %d), status = %d",
|
|
|
2191 (chp != NULL ? chp->prog: "??"), pid,
|
|
|
2192 WEXITSTATUS(status));
|
|
|
2193 }
|
|
|
2194 if ((chp != NULL) && (chp->done != NULL))
|
|
|
2195 (*chp->done)(chp->arg, status);
|
|
|
2196 if (chp != NULL)
|
|
|
2197 free(chp);
|
|
|
2198 }
|
|
|
2199 }
|
|
|
2200 return (0);
|
|
|
2201 }
|
|
|
2202
|
|
|
2203 /*
|
|
|
2204 * infanticide - timeout while waiting for child process.
|
|
|
2205 */
|
|
|
2206 /*ARGSUSED*/
|
|
|
2207 static void
|
|
|
2208 infanticide(sig)
|
|
|
2209 int sig;
|
|
|
2210 {
|
|
|
2211 struct subprocess *chp;
|
|
|
2212 static int runcount = 0;
|
|
|
2213
|
|
|
2214 if (runcount < 2) {
|
|
|
2215 for (chp = children; chp != NULL; chp = chp->next)
|
|
|
2216 (void) kill(chp->pid, runcount == 0 ? SIGTERM : SIGKILL);
|
|
|
2217 } else {
|
|
|
2218 kill_my_pg(SIGTERM);
|
|
|
2219 /* Quit and hope for the best. */
|
|
|
2220 n_children = 0;
|
|
|
2221 }
|
|
|
2222 runcount++;
|
|
|
2223 }
|
|
|
2224
|
|
|
2225 /*
|
|
|
2226 * Perform final wait before exiting.
|
|
|
2227 */
|
|
|
2228 static void
|
|
|
2229 final_reap()
|
|
|
2230 {
|
|
|
2231 struct sigaction sa;
|
|
|
2232 struct subprocess *chp;
|
|
|
2233
|
|
|
2234 if (n_children > 0 && debug) {
|
|
|
2235 dbglog("Waiting for %d child processes...", n_children);
|
|
|
2236 for (chp = children; chp != NULL; chp = chp->next)
|
|
|
2237 dbglog(" pid %d: %s", chp->pid, chp->prog);
|
|
|
2238 }
|
|
|
2239 BZERO(&sa, sizeof (sa));
|
|
|
2240 /*CONSTANTCONDITION*/ SIGNAL(SIGALRM, infanticide);
|
|
|
2241 while (n_children > 0) {
|
|
|
2242 (void) alarm(7);
|
|
|
2243 if (reap_kids(1) < 0)
|
|
|
2244 break;
|
|
|
2245 }
|
|
|
2246 (void) alarm(0);
|
|
|
2247 }
|
|
|
2248
|
|
|
2249 /*
|
|
|
2250 * novm - log an error message saying we ran out of memory, and die.
|
|
|
2251 */
|
|
|
2252 void
|
|
|
2253 novm(msg)
|
|
|
2254 char *msg;
|
|
|
2255 {
|
|
|
2256 fatal("Virtual memory exhausted allocating %s\n", msg);
|
|
|
2257 }
|
|
|
2258
|
|
|
2259 /*
|
|
|
2260 * script_setenv - set an environment variable value to be used
|
|
|
2261 * for scripts that we run (e.g. ip-up, auth-up, etc.)
|
|
|
2262 */
|
|
|
2263 void
|
|
|
2264 script_setenv(var, value, iskey)
|
|
|
2265 const char *var;
|
|
|
2266 const char *value;
|
|
|
2267 int iskey;
|
|
|
2268 {
|
|
|
2269 size_t varl = strlen(var);
|
|
|
2270 size_t vl = varl + strlen(value) + 2;
|
|
|
2271 int i;
|
|
|
2272 char *p, *newstring;
|
|
|
2273
|
|
|
2274 /*
|
|
|
2275 * XXX: Can we assert that a tdb write lock is held here ? It appears that
|
|
|
2276 * Linux's use of tdb is not safe.
|
|
|
2277 */
|
|
|
2278 newstring = (char *) malloc(vl+1);
|
|
|
2279 if (newstring == NULL) {
|
|
|
2280 novm("script environment string");
|
|
|
2281 return;
|
|
|
2282 }
|
|
|
2283 *newstring++ = iskey;
|
|
|
2284 (void) slprintf(newstring, vl, "%s=%s", var, value);
|
|
|
2285
|
|
|
2286 /* check if this variable is already set */
|
|
|
2287 if (script_env != NULL) {
|
|
|
2288 for (i = 0; (p = script_env[i]) != NULL; ++i) {
|
|
|
2289 if (strncmp(p, var, varl) == 0 && p[varl] == '=') {
|
|
|
2290 #ifdef HAVE_MULTILINK
|
|
|
2291 if (p[-1] != '\0' && pppdb != NULL)
|
|
|
2292 delete_db_key(p);
|
|
|
2293 #endif
|
|
|
2294 free(p-1);
|
|
|
2295 script_env[i] = newstring;
|
|
|
2296 #ifdef HAVE_MULTILINK
|
|
|
2297 if (iskey && pppdb != NULL)
|
|
|
2298 add_db_key(newstring);
|
|
|
2299 update_db_entry();
|
|
|
2300 #endif
|
|
|
2301 return;
|
|
|
2302 }
|
|
|
2303 }
|
|
|
2304 } else {
|
|
|
2305 /* no space allocated for script env. ptrs. yet */
|
|
|
2306 i = 0;
|
|
|
2307 script_env = (char **) malloc(16 * sizeof(char *));
|
|
|
2308 if (script_env == NULL) {
|
|
|
2309 novm("script environment variable.");
|
|
|
2310 return;
|
|
|
2311 }
|
|
|
2312 s_env_nalloc = 16;
|
|
|
2313 }
|
|
|
2314
|
|
|
2315 /* reallocate script_env with more space if needed */
|
|
|
2316 if (i + 1 >= s_env_nalloc) {
|
|
|
2317 int new_n = i + 17;
|
|
|
2318 char **newenv = (char **) realloc((void *)script_env,
|
|
|
2319 new_n * sizeof(char *));
|
|
|
2320 if (newenv == NULL) {
|
|
|
2321 novm("expanded script environment variable.");
|
|
|
2322 return;
|
|
|
2323 }
|
|
|
2324 script_env = newenv;
|
|
|
2325 s_env_nalloc = new_n;
|
|
|
2326 }
|
|
|
2327
|
|
|
2328 script_env[i] = newstring;
|
|
|
2329 script_env[i+1] = NULL;
|
|
|
2330
|
|
|
2331 #ifdef HAVE_MULTILINK
|
|
|
2332 if (pppdb != NULL) {
|
|
|
2333 if (iskey)
|
|
|
2334 add_db_key(newstring);
|
|
|
2335 update_db_entry();
|
|
|
2336 }
|
|
|
2337 #endif
|
|
|
2338 }
|
|
|
2339
|
|
|
2340 /*
|
|
|
2341 * script_unsetenv - remove a variable from the environment
|
|
|
2342 * for scripts.
|
|
|
2343 */
|
|
|
2344 void
|
|
|
2345 script_unsetenv(var)
|
|
|
2346 const char *var;
|
|
|
2347 {
|
|
|
2348 int vl = strlen(var);
|
|
|
2349 int i;
|
|
|
2350 char *p;
|
|
|
2351
|
|
|
2352 /*
|
|
|
2353 * XXX: Can we assert that a tdb write lock is held here ? It appears that
|
|
|
2354 * Linux's use of tdb is not safe.
|
|
|
2355 */
|
|
|
2356 if (script_env == NULL)
|
|
|
2357 return;
|
|
|
2358 for (i = 0; (p = script_env[i]) != NULL; ++i) {
|
|
|
2359 if (strncmp(p, var, vl) == 0 && p[vl] == '=') {
|
|
|
2360 #ifdef HAVE_MULTILINK
|
|
|
2361 if (p[-1] != '\0' && pppdb != NULL)
|
|
|
2362 delete_db_key(p);
|
|
|
2363 #endif
|
|
|
2364 free(p-1);
|
|
|
2365 while ((script_env[i] = script_env[i+1]) != NULL)
|
|
|
2366 ++i;
|
|
|
2367 break;
|
|
|
2368 }
|
|
|
2369 }
|
|
|
2370 #ifdef HAVE_MULTILINK
|
|
|
2371 if ((pppdb != NULL) && (p != NULL))
|
|
|
2372 update_db_entry();
|
|
|
2373 #endif
|
|
|
2374 }
|
|
|
2375
|
|
|
2376 /*
|
|
|
2377 * script_getenv - find a variable in the script environment.
|
|
|
2378 */
|
|
|
2379 const char *
|
|
|
2380 script_getenv(var)
|
|
|
2381 const char *var;
|
|
|
2382 {
|
|
|
2383 int vl = strlen(var);
|
|
|
2384 int i;
|
|
|
2385 char *p;
|
|
|
2386
|
|
|
2387 if (script_env == NULL)
|
|
|
2388 return (NULL);
|
|
|
2389 for (i = 0; (p = script_env[i]) != NULL; ++i) {
|
|
|
2390 if (strncmp(p, var, vl) == 0 && p[vl] == '=')
|
|
|
2391 return ((const char *)p+vl+1);
|
|
|
2392 }
|
|
|
2393 return (NULL);
|
|
|
2394 }
|
|
|
2395
|
|
|
2396 #ifdef HAVE_MULTILINK
|
|
|
2397 /*
|
|
|
2398 * update_db_entry - update our entry in the database.
|
|
|
2399 */
|
|
|
2400 static void
|
|
|
2401 update_db_entry()
|
|
|
2402 {
|
|
|
2403 TDB_DATA key, dbuf;
|
|
|
2404 int vlen, i;
|
|
|
2405 char *p, *q, *vbuf;
|
|
|
2406
|
|
|
2407 if (script_env == NULL)
|
|
|
2408 return;
|
|
|
2409 /*
|
|
|
2410 * vlen needs to be initialized as 1, or otherwise, the last string
|
|
|
2411 * is truncated by slprintf.
|
|
|
2412 */
|
|
|
2413 vlen = 1;
|
|
|
2414 for (i = 0; (p = script_env[i]) != NULL; ++i)
|
|
|
2415 vlen += strlen(p) + 1;
|
|
|
2416 vbuf = malloc(vlen);
|
|
|
2417 if (vbuf == NULL)
|
|
|
2418 novm("database entry");
|
|
|
2419 q = vbuf;
|
|
|
2420 for (i = 0; (p = script_env[i]) != NULL; ++i)
|
|
|
2421 q += slprintf(q, vbuf + vlen - q, "%s;", p);
|
|
|
2422
|
|
|
2423 key.dptr = db_key;
|
|
|
2424 key.dsize = strlen(db_key);
|
|
|
2425 dbuf.dptr = vbuf;
|
|
|
2426 dbuf.dsize = vlen;
|
|
|
2427 if (tdb_store(pppdb, key, dbuf, TDB_REPLACE))
|
|
|
2428 error("tdb_store failed: %s", tdb_error(pppdb));
|
|
|
2429 }
|
|
|
2430
|
|
|
2431 /*
|
|
|
2432 * add_db_key - add a key that we can use to look up our database entry.
|
|
|
2433 */
|
|
|
2434 static void
|
|
|
2435 add_db_key(str)
|
|
|
2436 const char *str;
|
|
|
2437 {
|
|
|
2438 TDB_DATA key, dbuf;
|
|
|
2439
|
|
|
2440 key.dptr = (char *) str;
|
|
|
2441 key.dsize = strlen(str);
|
|
|
2442 dbuf.dptr = db_key;
|
|
|
2443 dbuf.dsize = strlen(db_key);
|
|
|
2444 if (tdb_store(pppdb, key, dbuf, TDB_REPLACE))
|
|
|
2445 error("tdb_store key failed: %s", tdb_error(pppdb));
|
|
|
2446 }
|
|
|
2447
|
|
|
2448 /*
|
|
|
2449 * delete_db_key - delete a key for looking up our database entry.
|
|
|
2450 */
|
|
|
2451 static void
|
|
|
2452 delete_db_key(str)
|
|
|
2453 const char *str;
|
|
|
2454 {
|
|
|
2455 TDB_DATA key;
|
|
|
2456
|
|
|
2457 key.dptr = (char *) str;
|
|
|
2458 key.dsize = strlen(str);
|
|
|
2459 (void) tdb_delete(pppdb, key);
|
|
|
2460 }
|
|
|
2461
|
|
|
2462 /*
|
|
|
2463 * cleanup_db - delete all the entries we put in the database.
|
|
|
2464 */
|
|
|
2465 static void
|
|
|
2466 cleanup_db()
|
|
|
2467 {
|
|
|
2468 TDB_DATA key;
|
|
|
2469 int i;
|
|
|
2470 char *p;
|
|
|
2471
|
|
|
2472 key.dptr = db_key;
|
|
|
2473 key.dsize = strlen(db_key);
|
|
|
2474 (void) tdb_delete(pppdb, key);
|
|
|
2475 for (i = 0; (p = script_env[i]) != NULL; ++i)
|
|
|
2476 if (p[-1] != '\0')
|
|
|
2477 delete_db_key(p);
|
|
|
2478 }
|
|
|
2479 #endif /* HAVE_MULTILINK */
|
|
|
2480
|
|
|
2481 /*
|
|
|
2482 * open_socket - establish a stream socket connection to the nominated
|
|
|
2483 * host and port.
|
|
|
2484 * XXX: Need IPv6 support for those systems that support it (use getaddrinfo),
|
|
|
2485 * but requires portability changes.
|
|
|
2486 */
|
|
|
2487 static int
|
|
|
2488 open_socket(dest)
|
|
|
2489 char *dest;
|
|
|
2490 {
|
|
|
2491 char *sep, *endp = NULL;
|
|
|
2492 int sock;
|
|
|
2493 int port = -1;
|
|
|
2494 u_int32_t host;
|
|
|
2495 struct hostent *hent = NULL;
|
|
|
2496 struct sockaddr_in sad;
|
|
|
2497 struct servent *se;
|
|
|
2498
|
|
|
2499 /* parse host:port and resolve host to an IP address */
|
|
|
2500 sep = strchr(dest, ':');
|
|
|
2501 if (sep != NULL) {
|
|
|
2502 se = getservbyname((const char *)sep+1, "tcp");
|
|
|
2503 if (se != NULL) {
|
|
|
2504 port = ntohs(se->s_port);
|
|
|
2505 } else {
|
|
|
2506 port = strtol(sep+1, &endp, 10);
|
|
|
2507 if (endp == sep+1 || *endp != '\0') {
|
|
|
2508 error("Can't parse host:port for socket destination");
|
|
|
2509 return (-1);
|
|
|
2510 }
|
|
|
2511 }
|
|
|
2512 }
|
|
|
2513 if (port < 0 || port > 65535 || sep == dest) {
|
|
|
2514 error("Can't parse host:port for socket destination");
|
|
|
2515 return (-1);
|
|
|
2516 }
|
|
|
2517 *sep = '\0';
|
|
|
2518 host = inet_addr(dest);
|
|
|
2519 if (host == (u_int32_t) -1) {
|
|
|
2520 hent = gethostbyname(dest);
|
|
|
2521 if (hent == NULL) {
|
|
|
2522 error("%s: unknown host in socket option", dest);
|
|
|
2523 *sep = ':';
|
|
|
2524 return (-1);
|
|
|
2525 }
|
|
|
2526 BCOPY(hent->h_addr_list[0], &host, sizeof(host));
|
|
|
2527 hent->h_addr_list++;
|
|
|
2528 }
|
|
|
2529 *sep = ':';
|
|
|
2530
|
|
|
2531 for (;;) {
|
|
|
2532 /* get a socket and connect it to the other end */
|
|
|
2533 sock = socket(PF_INET, SOCK_STREAM, 0);
|
|
|
2534 if (sock < 0) {
|
|
|
2535 error("Can't create socket: %m");
|
|
|
2536 return (-1);
|
|
|
2537 }
|
|
|
2538 BZERO(&sad, sizeof(sad));
|
|
|
2539 sad.sin_family = AF_INET;
|
|
|
2540 sad.sin_port = htons(port);
|
|
|
2541 sad.sin_addr.s_addr = host;
|
|
|
2542 if (connect(sock, (struct sockaddr *)&sad, sizeof(sad)) >= 0) {
|
|
|
2543 break; /* return sock file descriptor */
|
|
|
2544 }
|
|
|
2545 if ((hent != NULL) && (hent->h_addr_list != NULL)) {
|
|
|
2546 BCOPY(hent->h_addr_list[0], &host, sizeof(host));
|
|
|
2547 hent->h_addr_list++;
|
|
|
2548 (void) close(sock);
|
|
|
2549 continue;
|
|
|
2550 }
|
|
|
2551 error("Can't connect to %s: %m", dest);
|
|
|
2552 (void) close(sock);
|
|
|
2553 return (-1);
|
|
|
2554 }
|
|
|
2555 return (sock);
|
|
|
2556 }
|
|
|
2557
|
|
|
2558 /*
|
|
|
2559 * print_ncpstate - prints out current NCP state.
|
|
|
2560 *
|
|
|
2561 * We're normally called from SIGUSR1 here, but this is safe because
|
|
|
2562 * these signals are blocked unless we're idle waiting for events.
|
|
|
2563 * There's no need to otherwise lock the data structures referenced.
|
|
|
2564 */
|
|
|
2565 void
|
|
|
2566 print_ncpstate(unit, strptr)
|
|
|
2567 int unit;
|
|
|
2568 FILE *strptr;
|
|
|
2569 {
|
|
|
2570 struct protent *protp;
|
|
|
2571 int i;
|
|
|
2572
|
|
|
2573 (void) flprintf(strptr, "In %s phase\n", phase_name(phase));
|
|
|
2574 for (i = 0; (protp = protocols[i]) != NULL; ++i) {
|
|
|
2575 if (protp->print_stat != NULL)
|
|
|
2576 (*protp->print_stat)(unit, strptr);
|
|
|
2577 }
|
|
|
2578 sys_print_state(strptr);
|
|
|
2579 }
|
|
|
2580
|
|
|
2581 /*
|
|
|
2582 * start_charshunt - create a child process to run the character shunt.
|
|
|
2583 */
|
|
|
2584 static int
|
|
|
2585 start_charshunt(ifd, ofd)
|
|
|
2586 int ifd, ofd;
|
|
|
2587 {
|
|
|
2588 pid_t cpid;
|
|
|
2589
|
|
|
2590 cpid = fork();
|
|
|
2591 if (cpid == (pid_t)-1) {
|
|
|
2592 error("Can't fork process for character shunt: %m");
|
|
|
2593 return (0);
|
|
|
2594 }
|
|
|
2595 if (cpid == (pid_t)0) {
|
|
|
2596 /* child */
|
|
|
2597 (void) close(pty_slave);
|
|
|
2598 pty_slave = -1;
|
|
|
2599 (void) setgid(getgid());
|
|
|
2600 (void) setuid(uid);
|
|
|
2601 if (getuid() != uid)
|
|
|
2602 fatal("setuid failed");
|
|
|
2603 if (!nodetach)
|
|
|
2604 log_to_fd = -1;
|
|
|
2605 charshunt(ifd, ofd, record_file);
|
|
|
2606 exit(0);
|
|
|
2607 }
|
|
|
2608 charshunt_pid = cpid;
|
|
|
2609 (void) close(pty_master);
|
|
|
2610 pty_master = -1;
|
|
|
2611 ttyfd = pty_slave;
|
|
|
2612 record_child(cpid, "pppd (charshunt)", charshunt_done, NULL);
|
|
|
2613 return (1);
|
|
|
2614 }
|
|
|
2615
|
|
|
2616 /*ARGSUSED*/
|
|
|
2617 static void
|
|
|
2618 charshunt_done(arg, status)
|
|
|
2619 void *arg;
|
|
|
2620 int status;
|
|
|
2621 {
|
|
|
2622 charshunt_pid = (pid_t)0;
|
|
|
2623 }
|
|
|
2624
|
|
|
2625 static void
|
|
|
2626 reportme(int signo)
|
|
|
2627 {
|
|
|
2628 dbglog("charshunt taking signal %d", signo);
|
|
|
2629 exit(1);
|
|
|
2630 }
|
|
|
2631
|
|
|
2632 /*
|
|
|
2633 * charshunt - the character shunt, which passes characters between
|
|
|
2634 * the pty master side and the serial port (or stdin/stdout).
|
|
|
2635 * This runs as the user (not as root).
|
|
|
2636 * (We assume ofd >= ifd which is true the way this gets called. :-).
|
|
|
2637 */
|
|
|
2638 static void
|
|
|
2639 charshunt(ifd, ofd, record_file)
|
|
|
2640 int ifd, ofd;
|
|
|
2641 char *record_file;
|
|
|
2642 {
|
|
|
2643 int n, nfds;
|
|
|
2644 fd_set ready, writey;
|
|
|
2645 u_char *ibufp, *obufp;
|
|
|
2646 int nibuf, nobuf;
|
|
|
2647 int flags;
|
|
|
2648 struct timeval lasttime;
|
|
|
2649 FILE *recordf = NULL;
|
|
|
2650 int ilevel, olevel, max_level;
|
|
|
2651 struct timeval levelt, tout, *top;
|
|
|
2652
|
|
|
2653 /*
|
|
|
2654 * Reset signal handlers.
|
|
|
2655 */
|
|
|
2656 (void) signal(SIGHUP, SIG_IGN); /* Hangup */
|
|
|
2657 (void) signal(SIGINT, reportme); /* Interrupt */
|
|
|
2658 (void) signal(SIGTERM, reportme); /* Terminate */
|
|
|
2659 (void) signal(SIGCHLD, reportme);
|
|
|
2660 (void) signal(SIGUSR1, reportme);
|
|
|
2661 (void) signal(SIGUSR2, reportme);
|
|
|
2662 (void) signal(SIGABRT, reportme);
|
|
|
2663 (void) signal(SIGALRM, reportme);
|
|
|
2664 (void) signal(SIGFPE, reportme);
|
|
|
2665 (void) signal(SIGILL, reportme);
|
|
|
2666 (void) signal(SIGPIPE, reportme);
|
|
|
2667 (void) signal(SIGQUIT, reportme);
|
|
|
2668 #ifndef DEBUG
|
|
|
2669 (void) signal(SIGSEGV, reportme);
|
|
|
2670 #endif
|
|
|
2671 #ifdef SIGBUS
|
|
|
2672 (void) signal(SIGBUS, reportme);
|
|
|
2673 #endif
|
|
|
2674 #ifdef SIGEMT
|
|
|
2675 (void) signal(SIGEMT, reportme);
|
|
|
2676 #endif
|
|
|
2677 #ifdef SIGPOLL
|
|
|
2678 (void) signal(SIGPOLL, reportme);
|
|
|
2679 #endif
|
|
|
2680 #ifdef SIGPROF
|
|
|
2681 (void) signal(SIGPROF, reportme);
|
|
|
2682 #endif
|
|
|
2683 #ifdef SIGSYS
|
|
|
2684 (void) signal(SIGSYS, reportme);
|
|
|
2685 #endif
|
|
|
2686 #ifdef SIGTRAP
|
|
|
2687 (void) signal(SIGTRAP, reportme);
|
|
|
2688 #endif
|
|
|
2689 #ifdef SIGVTALRM
|
|
|
2690 (void) signal(SIGVTALRM, reportme);
|
|
|
2691 #endif
|
|
|
2692 #ifdef SIGXCPU
|
|
|
2693 (void) signal(SIGXCPU, reportme);
|
|
|
2694 #endif
|
|
|
2695 #ifdef SIGXFSZ
|
|
|
2696 (void) signal(SIGXFSZ, reportme);
|
|
|
2697 #endif
|
|
|
2698
|
|
|
2699 /*
|
|
|
2700 * Open the record file if required.
|
|
|
2701 */
|
|
|
2702 if (record_file != NULL) {
|
|
|
2703 recordf = fopen(record_file, "a");
|
|
|
2704 if (recordf == NULL)
|
|
|
2705 error("Couldn't create record file %s: %m", record_file);
|
|
|
2706 }
|
|
|
2707
|
|
|
2708 /* set all the fds to non-blocking mode */
|
|
|
2709 flags = fcntl(pty_master, F_GETFL);
|
|
|
2710 if (flags == -1
|
|
|
2711 || fcntl(pty_master, F_SETFL, flags | O_NONBLOCK) == -1)
|
|
|
2712 warn("couldn't set pty master to nonblock: %m");
|
|
|
2713 flags = fcntl(ifd, F_GETFL);
|
|
|
2714 if (flags == -1
|
|
|
2715 || fcntl(ifd, F_SETFL, flags | O_NONBLOCK) == -1)
|
|
|
2716 warn("couldn't set %s to nonblock: %m", (ifd==0? "stdin": "tty"));
|
|
|
2717 if (ofd != ifd) {
|
|
|
2718 flags = fcntl(ofd, F_GETFL);
|
|
|
2719 if (flags == -1
|
|
|
2720 || fcntl(ofd, F_SETFL, flags | O_NONBLOCK) == -1)
|
|
|
2721 warn("couldn't set stdout to nonblock: %m");
|
|
|
2722 }
|
|
|
2723
|
|
|
2724 nibuf = nobuf = 0;
|
|
|
2725 ibufp = obufp = NULL;
|
|
|
2726
|
|
|
2727 ilevel = olevel = 0;
|
|
|
2728 (void) gettimeofday(&levelt, NULL);
|
|
|
2729 if (max_data_rate) {
|
|
|
2730 max_level = max_data_rate / 10;
|
|
|
2731 if (max_level < MAXLEVELMINSIZE)
|
|
|
2732 max_level = MAXLEVELMINSIZE;
|
|
|
2733 } else
|
|
|
2734 max_level = sizeof(inpacket_buf) + 1;
|
|
|
2735
|
|
|
2736 nfds = (ofd > pty_master? ofd: pty_master) + 1;
|
|
|
2737 if (recordf != NULL) {
|
|
|
2738 (void) gettimeofday(&lasttime, NULL);
|
|
|
2739 (void) putc(RECMARK_TIMESTART, recordf); /* put start marker */
|
|
|
2740 (void) putc(lasttime.tv_sec >> 24, recordf);
|
|
|
2741 (void) putc(lasttime.tv_sec >> 16, recordf);
|
|
|
2742 (void) putc(lasttime.tv_sec >> 8, recordf);
|
|
|
2743 (void) putc(lasttime.tv_sec, recordf);
|
|
|
2744 lasttime.tv_usec = 0;
|
|
|
2745 }
|
|
|
2746
|
|
|
2747 while (nibuf != 0 || nobuf != 0 || ofd >= 0 || pty_master >= 0) {
|
|
|
2748 top = 0;
|
|
|
2749 tout.tv_sec = 0;
|
|
|
2750 tout.tv_usec = 10000;
|
|
|
2751 FD_ZERO(&ready);
|
|
|
2752 FD_ZERO(&writey);
|
|
|
2753 if (nibuf != 0) {
|
|
|
2754 if (ilevel >= max_level)
|
|
|
2755 top = &tout;
|
|
|
2756 else if (pty_master >= 0)
|
|
|
2757 FD_SET(pty_master, &writey);
|
|
|
2758 } else if (ifd >= 0)
|
|
|
2759 FD_SET(ifd, &ready);
|
|
|
2760 if (nobuf != 0) {
|
|
|
2761 if (olevel >= max_level)
|
|
|
2762 top = &tout;
|
|
|
2763 else if (ofd >= 0)
|
|
|
2764 FD_SET(ofd, &writey);
|
|
|
2765 } else {
|
|
|
2766 /* Don't read from pty if it's gone or it has closed. */
|
|
|
2767 if (pty_master >= 0 && ofd >= 0)
|
|
|
2768 FD_SET(pty_master, &ready);
|
|
|
2769 }
|
|
|
2770 if (select(nfds, &ready, &writey, NULL, top) < 0) {
|
|
|
2771 if (errno != EINTR)
|
|
|
2772 fatal("select");
|
|
|
2773 continue;
|
|
|
2774 }
|
|
|
2775 if (max_data_rate) {
|
|
|
2776 double dt;
|
|
|
2777 int nbt;
|
|
|
2778 struct timeval now;
|
|
|
2779
|
|
|
2780 (void) gettimeofday(&now, NULL);
|
|
|
2781 dt = (now.tv_sec - levelt.tv_sec
|
|
|
2782 + (now.tv_usec - levelt.tv_usec) / 1e6);
|
|
|
2783 nbt = (int)(dt * max_data_rate);
|
|
|
2784 ilevel = (nbt < 0 || nbt > ilevel)? 0: ilevel - nbt;
|
|
|
2785 olevel = (nbt < 0 || nbt > olevel)? 0: olevel - nbt;
|
|
|
2786 levelt = now;
|
|
|
2787 } else
|
|
|
2788 ilevel = olevel = 0;
|
|
|
2789 if (FD_ISSET(ifd, &ready)) {
|
|
|
2790 ibufp = inpacket_buf;
|
|
|
2791 nibuf = read(ifd, ibufp, sizeof(inpacket_buf));
|
|
|
2792 if (nibuf < 0 && errno == EIO)
|
|
|
2793 nibuf = 0;
|
|
|
2794 if (nibuf < 0 || pty_master == -1) {
|
|
|
2795 if (errno != EINTR && errno != EAGAIN) {
|
|
|
2796 error("Error reading standard input: %m");
|
|
|
2797 break;
|
|
|
2798 }
|
|
|
2799 nibuf = 0;
|
|
|
2800 } else if (nibuf == 0) {
|
|
|
2801 /* end of file from stdin */
|
|
|
2802 (void) close(pty_master);
|
|
|
2803 pty_master = -1;
|
|
|
2804 (void) close(ifd);
|
|
|
2805 ifd = -1;
|
|
|
2806 if (recordf)
|
|
|
2807 if (!record_write(recordf, RECMARK_ENDRECV, NULL, 0,
|
|
|
2808 &lasttime))
|
|
|
2809 recordf = NULL;
|
|
|
2810 } else {
|
|
|
2811 FD_SET(pty_master, &writey);
|
|
|
2812 if (recordf)
|
|
|
2813 if (!record_write(recordf, RECMARK_STARTRECV, ibufp, nibuf,
|
|
|
2814 &lasttime))
|
|
|
2815 recordf = NULL;
|
|
|
2816 }
|
|
|
2817 }
|
|
|
2818 if (ofd >= 0 && pty_master >= 0 && FD_ISSET(pty_master, &ready)) {
|
|
|
2819 obufp = outpacket_buf;
|
|
|
2820 nobuf = read(pty_master, obufp, sizeof(outpacket_buf));
|
|
|
2821 if (nobuf < 0 && errno == EIO)
|
|
|
2822 nobuf = 0;
|
|
|
2823 if (nobuf < 0 || ofd == -1) {
|
|
|
2824 if (!(errno == EINTR || errno == EAGAIN)) {
|
|
|
2825 error("Error reading pseudo-tty master: %m");
|
|
|
2826 break;
|
|
|
2827 }
|
|
|
2828 nobuf = 0;
|
|
|
2829 } else if (nobuf == 0) {
|
|
|
2830 /* end of file from the pty - slave side has closed */
|
|
|
2831 nibuf = 0;
|
|
|
2832 (void) close(ofd);
|
|
|
2833 ofd = -1;
|
|
|
2834 if (recordf)
|
|
|
2835 if (!record_write(recordf, RECMARK_ENDSEND, NULL, 0,
|
|
|
2836 &lasttime))
|
|
|
2837 recordf = NULL;
|
|
|
2838 } else {
|
|
|
2839 FD_SET(ofd, &writey);
|
|
|
2840 if (recordf)
|
|
|
2841 if (!record_write(recordf, RECMARK_STARTSEND, obufp, nobuf,
|
|
|
2842 &lasttime))
|
|
|
2843 recordf = NULL;
|
|
|
2844 }
|
|
|
2845 }
|
|
|
2846 if (ofd == -1)
|
|
|
2847 nobuf = 0;
|
|
|
2848 else if (FD_ISSET(ofd, &writey)) {
|
|
|
2849 n = nobuf;
|
|
|
2850 if (olevel + n > max_level)
|
|
|
2851 n = max_level - olevel;
|
|
|
2852 n = write(ofd, obufp, n);
|
|
|
2853 if (n < 0) {
|
|
|
2854 if (errno == EIO) {
|
|
|
2855 (void) close(ofd);
|
|
|
2856 ofd = -1;
|
|
|
2857 nobuf = 0;
|
|
|
2858 } else if (errno != EAGAIN && errno != EINTR) {
|
|
|
2859 error("Error writing standard output: %m");
|
|
|
2860 break;
|
|
|
2861 }
|
|
|
2862 } else {
|
|
|
2863 obufp += n;
|
|
|
2864 nobuf -= n;
|
|
|
2865 olevel += n;
|
|
|
2866 }
|
|
|
2867 }
|
|
|
2868 if (pty_master == -1)
|
|
|
2869 nibuf = 0;
|
|
|
2870 else if (FD_ISSET(pty_master, &writey)) {
|
|
|
2871 n = nibuf;
|
|
|
2872 if (ilevel + n > max_level)
|
|
|
2873 n = max_level - ilevel;
|
|
|
2874 n = write(pty_master, ibufp, n);
|
|
|
2875 if (n < 0) {
|
|
|
2876 if (errno == EAGAIN || errno == EINTR)
|
|
|
2877 continue;
|
|
|
2878 if (errno != EIO) {
|
|
|
2879 error("Error writing pseudo-tty master: %m");
|
|
|
2880 break;
|
|
|
2881 }
|
|
|
2882 (void) close(pty_master);
|
|
|
2883 pty_master = -1;
|
|
|
2884 nibuf = 0;
|
|
|
2885 } else {
|
|
|
2886 ibufp += n;
|
|
|
2887 nibuf -= n;
|
|
|
2888 ilevel += n;
|
|
|
2889 }
|
|
|
2890 }
|
|
|
2891 }
|
|
|
2892 exit(0);
|
|
|
2893 }
|
|
|
2894
|
|
|
2895 static int
|
|
|
2896 record_write(f, code, buf, nb, tp)
|
|
|
2897 FILE *f;
|
|
|
2898 int code;
|
|
|
2899 u_char *buf;
|
|
|
2900 int nb;
|
|
|
2901 struct timeval *tp;
|
|
|
2902 {
|
|
|
2903 struct timeval now;
|
|
|
2904 int diff;
|
|
|
2905
|
|
|
2906 (void) gettimeofday(&now, NULL);
|
|
|
2907 now.tv_usec /= 100000; /* actually 1/10 s, not usec now */
|
|
|
2908 diff = (now.tv_sec - tp->tv_sec) * 10 + (now.tv_usec - tp->tv_usec);
|
|
|
2909 if (diff > 0) {
|
|
|
2910 if (diff > 255) {
|
|
|
2911 (void) putc(RECMARK_TIMEDELTA32, f);
|
|
|
2912 (void) putc(diff >> 24, f);
|
|
|
2913 (void) putc(diff >> 16, f);
|
|
|
2914 (void) putc(diff >> 8, f);
|
|
|
2915 (void) putc(diff, f);
|
|
|
2916 } else {
|
|
|
2917 (void) putc(RECMARK_TIMEDELTA8, f);
|
|
|
2918 (void) putc(diff, f);
|
|
|
2919 }
|
|
|
2920 *tp = now;
|
|
|
2921 }
|
|
|
2922 (void) putc(code, f);
|
|
|
2923 if (buf != NULL) {
|
|
|
2924 (void) putc(nb >> 8, f);
|
|
|
2925 (void) putc(nb, f);
|
|
|
2926 (void) fwrite(buf, nb, 1, f);
|
|
|
2927 }
|
|
|
2928 (void) fflush(f);
|
|
|
2929 if (ferror(f)) {
|
|
|
2930 error("Error writing record file: %m");
|
|
|
2931 return (0);
|
|
|
2932 }
|
|
|
2933 return (1);
|
|
|
2934 }
|
