1 | /* |
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2 | * sys-bsd.c - System-dependent procedures for setting up |
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3 | * PPP interfaces on bsd-4.4-ish systems (including 386BSD, NetBSD, etc.) |
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4 | * |
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5 | * Copyright (c) 1989 Carnegie Mellon University. |
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6 | * Copyright (c) 1995 The Australian National University. |
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7 | * All rights reserved. |
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8 | * |
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9 | * Redistribution and use in source and binary forms are permitted |
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10 | * provided that the above copyright notice and this paragraph are |
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11 | * duplicated in all such forms and that any documentation, |
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12 | * advertising materials, and other materials related to such |
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13 | * distribution and use acknowledge that the software was developed |
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14 | * by Carnegie Mellon University and The Australian National University. |
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15 | * The names of the Universities may not be used to endorse or promote |
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16 | * products derived from this software without specific prior written |
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17 | * permission. |
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18 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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19 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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20 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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21 | */ |
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22 | |
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23 | #define RCSID "$Id$" |
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24 | |
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25 | #include <stdio.h> |
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26 | #include <string.h> |
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27 | #include <stdlib.h> |
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28 | #include <unistd.h> |
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29 | #include <errno.h> |
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30 | #include <fcntl.h> |
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31 | #include <termios.h> |
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32 | #include <signal.h> |
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33 | #include <sys/ioctl.h> |
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34 | #include <sys/types.h> |
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35 | #include <sys/socket.h> |
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36 | #include <sys/time.h> |
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37 | #include <sys/stat.h> |
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38 | #include <sys/param.h> |
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39 | #ifdef PPP_FILTER |
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40 | #include <net/bpf.h> |
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41 | #endif |
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42 | |
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43 | #include <net/if.h> |
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44 | #include <net/ppp_defs.h> |
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45 | #include <net/if_ppp.h> |
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46 | #include <net/route.h> |
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47 | #include <net/if_dl.h> |
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48 | #include <netinet/in.h> |
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49 | |
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50 | #if RTM_VERSION >= 3 |
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51 | #include <sys/param.h> |
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52 | #if defined(NetBSD) && (NetBSD >= 199703) |
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53 | #include <netinet/if_inarp.h> |
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54 | #else /* NetBSD 1.2D or later */ |
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55 | #include <netinet/if_ether.h> |
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56 | #endif |
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57 | #endif |
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58 | |
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59 | #include <rtems.h> |
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60 | #include <rtems/rtems_bsdnet.h> |
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61 | #include <rtems/termiostypes.h> |
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62 | extern rtems_id rtems_pppd_taskid; |
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63 | |
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64 | #include "pppd.h" |
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65 | #include "fsm.h" |
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66 | #include "ipcp.h" |
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67 | |
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68 | static const char rcsid[] = RCSID; |
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69 | |
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70 | |
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71 | static int initdisc = -1; /* Initial TTY discipline for ppp_fd */ |
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72 | static int initfdflags = -1; /* Initial file descriptor flags for ppp_fd */ |
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73 | static int ppp_fd = -1; /* fd which is set to PPP discipline */ |
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74 | static int rtm_seq; |
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75 | |
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76 | static int restore_term; /* 1 => we've munged the terminal */ |
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77 | static struct termios inittermios; /* Initial TTY termios */ |
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78 | static struct winsize wsinfo; /* Initial window size info */ |
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79 | |
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80 | static int loop_slave = -1; |
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81 | static int loop_master; |
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82 | |
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83 | static unsigned char inbuf[512]; /* buffer for chars read from loopback */ |
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84 | |
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85 | static int sockfd; /* socket for doing interface ioctls */ |
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86 | |
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87 | static int if_is_up; /* the interface is currently up */ |
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88 | static uint32_t ifaddrs[2]; /* local and remote addresses we set */ |
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89 | static uint32_t default_route_gateway; /* gateway addr for default route */ |
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90 | static uint32_t proxy_arp_addr; /* remote addr for proxy arp */ |
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91 | |
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92 | /* Prototypes for procedures local to this file. */ |
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93 | static int dodefaultroute(uint32_t, int); |
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94 | static int get_ether_addr(uint32_t, struct sockaddr_dl *); |
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95 | |
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96 | |
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97 | /* |
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98 | * sys_init - System-dependent initialization. |
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99 | */ |
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100 | void |
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101 | sys_init(void) |
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102 | { |
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103 | /* Get an internet socket for doing socket ioctl's on. */ |
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104 | if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
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105 | fatal("Couldn't create IP socket: %m"); |
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106 | } |
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107 | |
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108 | /* |
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109 | * sys_cleanup - restore any system state we modified before exiting: |
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110 | * mark the interface down, delete default route and/or proxy arp entry. |
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111 | * This should call die() because it's called from die(). |
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112 | */ |
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113 | void |
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114 | sys_cleanup(void) |
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115 | { |
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116 | struct ifreq ifr; |
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117 | |
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118 | if (if_is_up) { |
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119 | strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); |
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120 | if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0 |
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121 | && ((ifr.ifr_flags & IFF_UP) != 0)) { |
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122 | ifr.ifr_flags &= ~IFF_UP; |
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123 | ioctl(sockfd, SIOCSIFFLAGS, &ifr); |
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124 | } |
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125 | } |
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126 | if (ifaddrs[0] != 0) |
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127 | cifaddr(0, ifaddrs[0], ifaddrs[1]); |
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128 | if (default_route_gateway) |
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129 | cifdefaultroute(0, 0, default_route_gateway); |
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130 | if (proxy_arp_addr) |
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131 | cifproxyarp(0, proxy_arp_addr); |
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132 | } |
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133 | |
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134 | /* |
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135 | * sys_close - Clean up in a child process before execing. |
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136 | */ |
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137 | void |
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138 | sys_close(void) |
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139 | { |
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140 | close(sockfd); |
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141 | if (loop_slave >= 0) { |
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142 | close(loop_slave); |
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143 | close(loop_master); |
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144 | } |
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145 | } |
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146 | |
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147 | /* |
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148 | * sys_check_options - check the options that the user specified |
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149 | */ |
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150 | int |
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151 | sys_check_options(void) |
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152 | { |
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153 | return 1; |
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154 | } |
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155 | |
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156 | /* |
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157 | * ppp_available - check whether the system has any ppp interfaces |
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158 | * (in fact we check whether we can do an ioctl on ppp0). |
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159 | */ |
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160 | int |
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161 | ppp_available(void) |
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162 | { |
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163 | int s, ok; |
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164 | struct ifreq ifr; |
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165 | |
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166 | if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
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167 | return 1; /* can't tell */ |
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168 | |
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169 | strlcpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name)); |
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170 | ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0; |
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171 | close(s); |
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172 | |
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173 | return ok; |
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174 | } |
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175 | |
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176 | /* |
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177 | * establish_ppp - Turn the serial port into a ppp interface. |
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178 | */ |
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179 | int |
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180 | establish_ppp( |
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181 | int fd) |
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182 | { |
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183 | int taskid = (int)rtems_pppd_taskid; |
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184 | int pppdisc = PPPDISC; |
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185 | int x; |
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186 | |
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187 | if (demand) { |
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188 | /* |
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189 | * Demand mode - prime the old ppp device to relinquish the unit. |
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190 | */ |
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191 | if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0) |
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192 | fatal("ioctl(transfer ppp unit): %m"); |
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193 | } |
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194 | |
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195 | /* |
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196 | * Save the old line discipline of fd, and set it to PPP. |
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197 | */ |
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198 | if (ioctl(fd, TIOCGETD, &initdisc) < 0) |
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199 | fatal("ioctl(TIOCGETD): %m"); |
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200 | if (ioctl(fd, TIOCSETD, &pppdisc) < 0) |
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201 | fatal("ioctl(TIOCSETD): %m"); |
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202 | |
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203 | /* set pppd taskid into the driver */ |
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204 | ioctl(fd, PPPIOCSTASK, &taskid); |
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205 | |
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206 | if (!demand) { |
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207 | /* |
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208 | * Find out which interface we were given. |
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209 | */ |
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210 | if (ioctl(fd, PPPIOCGUNIT, &pppifunit) < 0) |
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211 | fatal("ioctl(PPPIOCGUNIT): %m"); |
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212 | } else { |
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213 | /* |
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214 | * Check that we got the same unit again. |
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215 | */ |
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216 | if (ioctl(fd, PPPIOCGUNIT, &x) < 0) |
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217 | fatal("ioctl(PPPIOCGUNIT): %m"); |
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218 | if (x != pppifunit) |
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219 | fatal("transfer_ppp failed: wanted unit %d, got %d", pppifunit, x); |
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220 | x = TTYDISC; |
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221 | ioctl(loop_slave, TIOCSETD, &x); |
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222 | } |
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223 | |
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224 | ppp_fd = fd; |
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225 | |
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226 | /* |
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227 | * Enable debug in the driver if requested. |
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228 | */ |
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229 | if (kdebugflag) { |
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230 | if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { |
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231 | warn("ioctl (PPPIOCGFLAGS): %m"); |
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232 | } else { |
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233 | x |= (kdebugflag & 0xFF) * SC_DEBUG; |
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234 | if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) |
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235 | warn("ioctl(PPPIOCSFLAGS): %m"); |
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236 | } |
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237 | } |
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238 | |
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239 | /* |
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240 | * Set device for non-blocking reads. |
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241 | */ |
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242 | if ((initfdflags = fcntl(fd, F_GETFL)) == -1 |
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243 | || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) { |
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244 | warn("Couldn't set device to non-blocking mode: %m"); |
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245 | } |
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246 | |
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247 | return fd; |
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248 | } |
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249 | |
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250 | /* |
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251 | * restore_loop - reattach the ppp unit to the loopback. |
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252 | */ |
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253 | void |
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254 | restore_loop(void) |
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255 | { |
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256 | int x; |
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257 | |
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258 | /* |
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259 | * Transfer the ppp interface back to the loopback. |
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260 | */ |
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261 | if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0) |
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262 | fatal("ioctl(transfer ppp unit): %m"); |
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263 | x = PPPDISC; |
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264 | if (ioctl(loop_slave, TIOCSETD, &x) < 0) |
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265 | fatal("ioctl(TIOCSETD): %m"); |
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266 | |
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267 | /* |
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268 | * Check that we got the same unit again. |
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269 | */ |
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270 | if (ioctl(loop_slave, PPPIOCGUNIT, &x) < 0) |
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271 | fatal("ioctl(PPPIOCGUNIT): %m"); |
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272 | if (x != pppifunit) |
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273 | fatal("transfer_ppp failed: wanted unit %d, got %d", pppifunit, x); |
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274 | ppp_fd = loop_slave; |
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275 | } |
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276 | |
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277 | |
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278 | /* |
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279 | * disestablish_ppp - Restore the serial port to normal operation. |
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280 | * This shouldn't call die() because it's called from die(). |
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281 | */ |
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282 | void |
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283 | disestablish_ppp( |
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284 | int fd) |
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285 | { |
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286 | int taskid = (int)0; |
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287 | |
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288 | /* clear pppd taskid from the driver */ |
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289 | ioctl(fd, PPPIOCSTASK, &taskid); |
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290 | |
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291 | /* Reset non-blocking mode on fd. */ |
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292 | if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0) |
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293 | warn("Couldn't restore device fd flags: %m"); |
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294 | initfdflags = -1; |
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295 | |
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296 | /* Restore old line discipline. */ |
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297 | if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0) |
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298 | error("ioctl(TIOCSETD): %m"); |
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299 | initdisc = -1; |
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300 | |
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301 | if (fd == ppp_fd) |
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302 | ppp_fd = -1; |
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303 | } |
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304 | |
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305 | /* |
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306 | * Check whether the link seems not to be 8-bit clean. |
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307 | */ |
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308 | void |
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309 | clean_check(void) |
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310 | { |
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311 | int x; |
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312 | char *s; |
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313 | |
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314 | if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) { |
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315 | s = NULL; |
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316 | switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) { |
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317 | case SC_RCV_B7_0: |
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318 | s = "bit 7 set to 1"; |
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319 | break; |
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320 | case SC_RCV_B7_1: |
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321 | s = "bit 7 set to 0"; |
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322 | break; |
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323 | case SC_RCV_EVNP: |
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324 | s = "odd parity"; |
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325 | break; |
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326 | case SC_RCV_ODDP: |
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327 | s = "even parity"; |
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328 | break; |
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329 | } |
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330 | if (s != NULL) { |
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331 | warn("Serial link is not 8-bit clean:"); |
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332 | warn("All received characters had %s", s); |
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333 | } |
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334 | } |
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335 | } |
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336 | |
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337 | /* |
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338 | * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity, |
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339 | * at the requested speed, etc. If `local' is true, set CLOCAL |
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340 | * regardless of whether the modem option was specified. |
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341 | * |
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342 | * For *BSD, we assume that speed_t values numerically equal bits/second. |
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343 | */ |
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344 | void |
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345 | set_up_tty( |
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346 | int fd, int local) |
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347 | { |
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348 | struct termios tios; |
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349 | |
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350 | if (tcgetattr(fd, &tios) < 0) |
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351 | fatal("tcgetattr: %m"); |
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352 | |
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353 | if (!restore_term) { |
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354 | inittermios = tios; |
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355 | ioctl(fd, TIOCGWINSZ, &wsinfo); |
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356 | } |
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357 | |
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358 | tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL); |
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359 | if (crtscts > 0 && !local) { |
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360 | if (crtscts == 2) { |
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361 | #ifdef CDTRCTS |
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362 | tios.c_cflag |= CDTRCTS; |
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363 | #endif |
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364 | } else |
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365 | tios.c_cflag |= CRTSCTS; |
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366 | } else if (crtscts < 0) { |
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367 | tios.c_cflag &= ~CRTSCTS; |
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368 | #ifdef CDTRCTS |
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369 | tios.c_cflag &= ~CDTRCTS; |
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370 | #endif |
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371 | } |
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372 | |
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373 | tios.c_cflag |= CS8 | CREAD | HUPCL; |
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374 | if (local || !modem) |
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375 | tios.c_cflag |= CLOCAL; |
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376 | tios.c_iflag = IGNBRK | IGNPAR; |
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377 | tios.c_oflag = 0; |
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378 | tios.c_lflag = 0; |
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379 | tios.c_cc[VMIN] = 1; |
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380 | tios.c_cc[VTIME] = 0; |
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381 | |
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382 | if (crtscts == -2) { |
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383 | tios.c_iflag |= IXON | IXOFF; |
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384 | tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */ |
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385 | tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */ |
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386 | } |
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387 | |
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388 | if (inspeed) { |
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389 | cfsetospeed(&tios, inspeed); |
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390 | cfsetispeed(&tios, inspeed); |
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391 | } else { |
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392 | inspeed = cfgetospeed(&tios); |
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393 | /* |
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394 | * We can't proceed if the serial port speed is 0, |
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395 | * since that implies that the serial port is disabled. |
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396 | */ |
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397 | if (inspeed == 0) |
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398 | fatal("Baud rate for %s is 0; need explicit baud rate", devnam); |
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399 | } |
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400 | baud_rate = inspeed; |
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401 | |
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402 | /* if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) { */ |
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403 | if (tcsetattr(fd, TCSADRAIN, &tios) < 0) { |
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404 | fatal("tcsetattr: %m"); |
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405 | } |
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406 | |
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407 | restore_term = 1; |
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408 | } |
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409 | |
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410 | /* |
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411 | * restore_tty - restore the terminal to the saved settings. |
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412 | */ |
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413 | void |
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414 | restore_tty( |
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415 | int fd) |
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416 | { |
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417 | if (restore_term) { |
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418 | if (!default_device) { |
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419 | /* |
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420 | * Turn off echoing, because otherwise we can get into |
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421 | * a loop with the tty and the modem echoing to each other. |
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422 | * We presume we are the sole user of this tty device, so |
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423 | * when we close it, it will revert to its defaults anyway. |
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424 | */ |
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425 | inittermios.c_lflag &= ~(ECHO | ECHONL); |
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426 | } |
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427 | /* if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0) { */ |
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428 | if (tcsetattr(fd, TCSADRAIN, &inittermios) < 0) { |
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429 | if (errno != ENXIO) |
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430 | warn("tcsetattr: %m"); |
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431 | } |
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432 | ioctl(fd, TIOCSWINSZ, &wsinfo); |
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433 | restore_term = 0; |
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434 | } |
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435 | } |
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436 | |
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437 | /* |
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438 | * setdtr - control the DTR line on the serial port. |
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439 | * This is called from die(), so it shouldn't call die(). |
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440 | */ |
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441 | void |
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442 | setdtr( |
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443 | int fd, int on ) |
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444 | { |
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445 | int modembits = TIOCM_DTR; |
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446 | |
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447 | ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits); |
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448 | } |
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449 | |
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450 | /* |
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451 | * get_pty - get a pty master/slave pair and chown the slave side |
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452 | * to the uid given. Assumes slave_name points to >= 12 bytes of space. |
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453 | */ |
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454 | int |
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455 | get_pty( |
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456 | int *master_fdp, |
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457 | int *slave_fdp, |
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458 | char *slave_name, |
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459 | int uid) |
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460 | { |
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461 | return 1; |
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462 | } |
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463 | |
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464 | |
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465 | /* |
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466 | * open_ppp_loopback - open the device we use for getting |
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467 | * packets in demand mode, and connect it to a ppp interface. |
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468 | * Here we use a pty. |
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469 | */ |
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470 | int |
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471 | open_ppp_loopback(void) |
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472 | { |
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473 | return loop_master; |
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474 | } |
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475 | |
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476 | |
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477 | /* |
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478 | * output - Output PPP packet. |
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479 | */ |
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480 | void |
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481 | output( |
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482 | int unit, |
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483 | u_char *p, |
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484 | int len) |
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485 | { |
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486 | if (debug) |
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487 | dbglog("sent %P", p, len); |
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488 | /* printf("sent packet [%d]\n", len); */ |
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489 | |
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490 | if (write(pppd_ttyfd, p, len) < 0) { |
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491 | if (errno != EIO) |
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492 | error("write: %m"); |
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493 | } |
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494 | } |
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495 | |
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496 | void |
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497 | ppp_delay(void) |
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498 | { |
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499 | rtems_interval ticks; |
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500 | |
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501 | /* recommended delay to help negotiation */ |
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502 | ticks = 300000/rtems_configuration_get_microseconds_per_tick(); |
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503 | rtems_task_wake_after(ticks); |
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504 | } |
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505 | |
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506 | /* |
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507 | * wait_input - wait until there is data available, |
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508 | * for the length of time specified by *timo (indefinite |
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509 | * if timo is NULL). |
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510 | */ |
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511 | void |
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512 | wait_input( |
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513 | struct timeval *timo) |
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514 | { |
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515 | rtems_event_set events; |
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516 | rtems_interval ticks = 0; |
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517 | rtems_option wait = RTEMS_WAIT; |
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518 | |
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519 | if(timo) { |
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520 | if(timo->tv_sec == 0 && timo->tv_usec == 0) |
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521 | wait = RTEMS_NO_WAIT; |
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522 | else { |
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523 | ticks = (timo->tv_sec * 1000000 + timo->tv_usec) / |
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524 | rtems_configuration_get_microseconds_per_tick(); |
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525 | if(ticks <= 0) |
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526 | ticks = 1; |
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527 | } |
---|
528 | } |
---|
529 | rtems_event_receive(RTEMS_EVENT_31, RTEMS_EVENT_ANY | wait, ticks, &events); |
---|
530 | } |
---|
531 | |
---|
532 | /* |
---|
533 | * read_packet - get a PPP packet from the serial device. |
---|
534 | */ |
---|
535 | int |
---|
536 | read_packet( |
---|
537 | u_char *buf) |
---|
538 | { |
---|
539 | int len; |
---|
540 | |
---|
541 | if ((len = read(pppd_ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) { |
---|
542 | if (errno == EWOULDBLOCK || errno == EINTR) len = -1; |
---|
543 | /*fatal("read: %m"); */ |
---|
544 | } |
---|
545 | |
---|
546 | /* printf("read packet [%d]\n", len); */ |
---|
547 | return len; |
---|
548 | } |
---|
549 | |
---|
550 | |
---|
551 | /* |
---|
552 | * get_loop_output - read characters from the loopback, form them |
---|
553 | * into frames, and detect when we want to bring the real link up. |
---|
554 | * Return value is 1 if we need to bring up the link, 0 otherwise. |
---|
555 | */ |
---|
556 | int |
---|
557 | get_loop_output(void) |
---|
558 | { |
---|
559 | int rv = 0; |
---|
560 | int n; |
---|
561 | |
---|
562 | while ((n = read(loop_master, inbuf, sizeof(inbuf))) >= 0) { |
---|
563 | if (loop_chars(inbuf, n)) |
---|
564 | rv = 1; |
---|
565 | } |
---|
566 | |
---|
567 | if (n == 0) |
---|
568 | fatal("eof on loopback"); |
---|
569 | if (errno != EWOULDBLOCK) |
---|
570 | fatal("read from loopback: %m"); |
---|
571 | |
---|
572 | return rv; |
---|
573 | } |
---|
574 | |
---|
575 | |
---|
576 | /* |
---|
577 | * ppp_send_config - configure the transmit characteristics of |
---|
578 | * the ppp interface. |
---|
579 | */ |
---|
580 | void |
---|
581 | ppp_send_config( |
---|
582 | int unit, |
---|
583 | int mtu, |
---|
584 | uint32_t asyncmap, |
---|
585 | int pcomp, |
---|
586 | int accomp) |
---|
587 | { |
---|
588 | u_int x; |
---|
589 | struct ifreq ifr; |
---|
590 | |
---|
591 | strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); |
---|
592 | ifr.ifr_mtu = mtu; |
---|
593 | if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0) |
---|
594 | fatal("ioctl(SIOCSIFMTU): %m"); |
---|
595 | |
---|
596 | if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) |
---|
597 | fatal("ioctl(PPPIOCSASYNCMAP): %m"); |
---|
598 | |
---|
599 | if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) |
---|
600 | fatal("ioctl (PPPIOCGFLAGS): %m"); |
---|
601 | x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT; |
---|
602 | x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC; |
---|
603 | /* x = sync_serial ? x | SC_SYNC : x & ~SC_SYNC; */ |
---|
604 | if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) |
---|
605 | fatal("ioctl(PPPIOCSFLAGS): %m"); |
---|
606 | } |
---|
607 | |
---|
608 | |
---|
609 | /* |
---|
610 | * ppp_set_xaccm - set the extended transmit ACCM for the interface. |
---|
611 | */ |
---|
612 | void |
---|
613 | ppp_set_xaccm( |
---|
614 | int unit, |
---|
615 | ext_accm accm) |
---|
616 | { |
---|
617 | if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY) |
---|
618 | warn("ioctl(set extended ACCM): %m"); |
---|
619 | } |
---|
620 | |
---|
621 | |
---|
622 | /* |
---|
623 | * ppp_recv_config - configure the receive-side characteristics of |
---|
624 | * the ppp interface. |
---|
625 | */ |
---|
626 | void |
---|
627 | ppp_recv_config( |
---|
628 | int unit, |
---|
629 | int mru, |
---|
630 | uint32_t asyncmap, |
---|
631 | int pcomp, int accomp) |
---|
632 | { |
---|
633 | int x; |
---|
634 | |
---|
635 | if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) |
---|
636 | fatal("ioctl(PPPIOCSMRU): %m"); |
---|
637 | if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) |
---|
638 | fatal("ioctl(PPPIOCSRASYNCMAP): %m"); |
---|
639 | if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) |
---|
640 | fatal("ioctl (PPPIOCGFLAGS): %m"); |
---|
641 | x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC; |
---|
642 | if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) |
---|
643 | fatal("ioctl(PPPIOCSFLAGS): %m"); |
---|
644 | } |
---|
645 | |
---|
646 | /* |
---|
647 | * ccp_test - ask kernel whether a given compression method |
---|
648 | * is acceptable for use. Returns 1 if the method and parameters |
---|
649 | * are OK, 0 if the method is known but the parameters are not OK |
---|
650 | * (e.g. code size should be reduced), or -1 if the method is unknown. |
---|
651 | */ |
---|
652 | int |
---|
653 | ccp_test( |
---|
654 | int unit, u_char *opt_ptr, int opt_len, int for_transmit) |
---|
655 | { |
---|
656 | struct ppp_option_data data; |
---|
657 | |
---|
658 | data.ptr = opt_ptr; |
---|
659 | data.length = opt_len; |
---|
660 | data.transmit = for_transmit; |
---|
661 | if (ioctl(pppd_ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0) |
---|
662 | return 1; |
---|
663 | return (errno == ENOBUFS)? 0: -1; |
---|
664 | } |
---|
665 | |
---|
666 | /* |
---|
667 | * ccp_flags_set - inform kernel about the current state of CCP. |
---|
668 | */ |
---|
669 | void |
---|
670 | ccp_flags_set( |
---|
671 | int unit, int isopen, int isup) |
---|
672 | { |
---|
673 | int x; |
---|
674 | |
---|
675 | if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { |
---|
676 | error("ioctl (PPPIOCGFLAGS): %m"); |
---|
677 | return; |
---|
678 | } |
---|
679 | x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN; |
---|
680 | x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP; |
---|
681 | if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) |
---|
682 | error("ioctl(PPPIOCSFLAGS): %m"); |
---|
683 | } |
---|
684 | |
---|
685 | /* |
---|
686 | * ccp_fatal_error - returns 1 if decompression was disabled as a |
---|
687 | * result of an error detected after decompression of a packet, |
---|
688 | * 0 otherwise. This is necessary because of patent nonsense. |
---|
689 | */ |
---|
690 | int |
---|
691 | ccp_fatal_error( |
---|
692 | int unit) |
---|
693 | { |
---|
694 | int x; |
---|
695 | |
---|
696 | if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { |
---|
697 | error("ioctl(PPPIOCGFLAGS): %m"); |
---|
698 | return 0; |
---|
699 | } |
---|
700 | return x & SC_DC_FERROR; |
---|
701 | } |
---|
702 | |
---|
703 | /* |
---|
704 | * get_idle_time - return how long the link has been idle. |
---|
705 | */ |
---|
706 | int |
---|
707 | get_idle_time( |
---|
708 | int u, |
---|
709 | struct ppp_idle *ip) |
---|
710 | { |
---|
711 | return ioctl(ppp_fd, PPPIOCGIDLE, ip) >= 0; |
---|
712 | } |
---|
713 | |
---|
714 | /* |
---|
715 | * get_ppp_stats - return statistics for the link. |
---|
716 | */ |
---|
717 | int |
---|
718 | get_ppp_stats( |
---|
719 | int u, |
---|
720 | struct pppd_stats *stats) |
---|
721 | { |
---|
722 | struct ifpppstatsreq req; |
---|
723 | |
---|
724 | memset (&req, 0, sizeof (req)); |
---|
725 | strlcpy(req.ifr_name, ifname, sizeof(req.ifr_name)); |
---|
726 | if (ioctl(sockfd, SIOCGPPPSTATS, &req) < 0) { |
---|
727 | error("Couldn't get PPP statistics: %m"); |
---|
728 | return 0; |
---|
729 | } |
---|
730 | stats->bytes_in = req.stats.p.ppp_ibytes; |
---|
731 | stats->bytes_out = req.stats.p.ppp_obytes; |
---|
732 | return 1; |
---|
733 | } |
---|
734 | |
---|
735 | |
---|
736 | #ifdef PPP_FILTER |
---|
737 | /* |
---|
738 | * set_filters - transfer the pass and active filters to the kernel. |
---|
739 | */ |
---|
740 | int |
---|
741 | set_filters( |
---|
742 | struct bpf_program *pass, struct bpf_program *active) |
---|
743 | { |
---|
744 | int ret = 1; |
---|
745 | |
---|
746 | if (pass->bf_len > 0) { |
---|
747 | if (ioctl(ppp_fd, PPPIOCSPASS, pass) < 0) { |
---|
748 | error("Couldn't set pass-filter in kernel: %m"); |
---|
749 | ret = 0; |
---|
750 | } |
---|
751 | } |
---|
752 | if (active->bf_len > 0) { |
---|
753 | if (ioctl(ppp_fd, PPPIOCSACTIVE, active) < 0) { |
---|
754 | error("Couldn't set active-filter in kernel: %m"); |
---|
755 | ret = 0; |
---|
756 | } |
---|
757 | } |
---|
758 | return ret; |
---|
759 | } |
---|
760 | #endif |
---|
761 | |
---|
762 | /* |
---|
763 | * sifvjcomp - config tcp header compression |
---|
764 | */ |
---|
765 | int |
---|
766 | sifvjcomp( |
---|
767 | int u, int vjcomp, int cidcomp, int maxcid) |
---|
768 | { |
---|
769 | u_int x; |
---|
770 | |
---|
771 | if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { |
---|
772 | error("ioctl (PPPIOCGFLAGS): %m"); |
---|
773 | return 0; |
---|
774 | } |
---|
775 | x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP; |
---|
776 | x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID; |
---|
777 | if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) { |
---|
778 | error("ioctl(PPPIOCSFLAGS): %m"); |
---|
779 | return 0; |
---|
780 | } |
---|
781 | if (vjcomp && ioctl(ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) { |
---|
782 | error("ioctl(PPPIOCSMAXCID): %m"); |
---|
783 | return 0; |
---|
784 | } |
---|
785 | return 1; |
---|
786 | } |
---|
787 | |
---|
788 | /* |
---|
789 | * sifup - Config the interface up and enable IP packets to pass. |
---|
790 | */ |
---|
791 | int |
---|
792 | sifup( |
---|
793 | int u) |
---|
794 | { |
---|
795 | struct ifreq ifr; |
---|
796 | |
---|
797 | strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); |
---|
798 | if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) { |
---|
799 | error("ioctl (SIOCGIFFLAGS): %m"); |
---|
800 | return 0; |
---|
801 | } |
---|
802 | ifr.ifr_flags |= IFF_UP; |
---|
803 | if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) { |
---|
804 | error("ioctl(SIOCSIFFLAGS): %m"); |
---|
805 | return 0; |
---|
806 | } |
---|
807 | if_is_up = 1; |
---|
808 | return 1; |
---|
809 | } |
---|
810 | |
---|
811 | /* |
---|
812 | * sifnpmode - Set the mode for handling packets for a given NP. |
---|
813 | */ |
---|
814 | int |
---|
815 | sifnpmode( |
---|
816 | int u, |
---|
817 | int proto, |
---|
818 | enum NPmode mode) |
---|
819 | { |
---|
820 | struct npioctl npi; |
---|
821 | |
---|
822 | npi.protocol = proto; |
---|
823 | npi.mode = mode; |
---|
824 | if (ioctl(ppp_fd, PPPIOCSNPMODE, &npi) < 0) { |
---|
825 | error("ioctl(set NP %d mode to %d): %m", proto, mode); |
---|
826 | return 0; |
---|
827 | } |
---|
828 | return 1; |
---|
829 | } |
---|
830 | |
---|
831 | /* |
---|
832 | * sifdown - Config the interface down and disable IP. |
---|
833 | */ |
---|
834 | int |
---|
835 | sifdown( |
---|
836 | int u) |
---|
837 | { |
---|
838 | struct ifreq ifr; |
---|
839 | int rv; |
---|
840 | struct npioctl npi; |
---|
841 | |
---|
842 | rv = 1; |
---|
843 | npi.protocol = PPP_IP; |
---|
844 | npi.mode = NPMODE_ERROR; |
---|
845 | ioctl(ppp_fd, PPPIOCSNPMODE, (caddr_t) &npi); |
---|
846 | /* ignore errors, because ppp_fd might have been closed by now. */ |
---|
847 | |
---|
848 | strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); |
---|
849 | if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) { |
---|
850 | error("ioctl (SIOCGIFFLAGS): %m"); |
---|
851 | rv = 0; |
---|
852 | } else { |
---|
853 | ifr.ifr_flags &= ~IFF_UP; |
---|
854 | if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) { |
---|
855 | error("ioctl(SIOCSIFFLAGS): %m"); |
---|
856 | rv = 0; |
---|
857 | } else |
---|
858 | if_is_up = 0; |
---|
859 | } |
---|
860 | return rv; |
---|
861 | } |
---|
862 | |
---|
863 | /* |
---|
864 | * SET_SA_FAMILY - set the sa_family field of a struct sockaddr, |
---|
865 | * if it exists. |
---|
866 | */ |
---|
867 | #define SET_SA_FAMILY(addr, family) \ |
---|
868 | BZERO((char *) &(addr), sizeof(addr)); \ |
---|
869 | addr.sa_family = (family); \ |
---|
870 | addr.sa_len = sizeof(addr); |
---|
871 | |
---|
872 | /* |
---|
873 | * sifaddr - Config the interface IP addresses and netmask. |
---|
874 | */ |
---|
875 | int |
---|
876 | sifaddr( |
---|
877 | int u, |
---|
878 | uint32_t o, uint32_t h, uint32_t m ) |
---|
879 | { |
---|
880 | struct ifaliasreq ifra; |
---|
881 | struct ifreq ifr; |
---|
882 | |
---|
883 | strlcpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name)); |
---|
884 | SET_SA_FAMILY(ifra.ifra_addr, AF_INET); |
---|
885 | ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o; |
---|
886 | SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET); |
---|
887 | ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h; |
---|
888 | if (m != 0) { |
---|
889 | SET_SA_FAMILY(ifra.ifra_mask, AF_INET); |
---|
890 | ((struct sockaddr_in *) &ifra.ifra_mask)->sin_addr.s_addr = m; |
---|
891 | } else |
---|
892 | BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask)); |
---|
893 | BZERO(&ifr, sizeof(ifr)); |
---|
894 | strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); |
---|
895 | if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifr) < 0) { |
---|
896 | if (errno != EADDRNOTAVAIL) |
---|
897 | warn("Couldn't remove interface address: %m"); |
---|
898 | } |
---|
899 | if (ioctl(sockfd, SIOCAIFADDR, (caddr_t) &ifra) < 0) { |
---|
900 | if (errno != EEXIST) { |
---|
901 | error("Couldn't set interface address: %m"); |
---|
902 | return 0; |
---|
903 | } |
---|
904 | warn("Couldn't set interface address: Address %I already exists", o); |
---|
905 | } |
---|
906 | ifaddrs[0] = o; |
---|
907 | ifaddrs[1] = h; |
---|
908 | return 1; |
---|
909 | } |
---|
910 | |
---|
911 | /* |
---|
912 | * cifaddr - Clear the interface IP addresses, and delete routes |
---|
913 | * through the interface if possible. |
---|
914 | */ |
---|
915 | int |
---|
916 | cifaddr( |
---|
917 | int u, |
---|
918 | uint32_t o, uint32_t h ) |
---|
919 | { |
---|
920 | struct ifaliasreq ifra; |
---|
921 | |
---|
922 | ifaddrs[0] = 0; |
---|
923 | strlcpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name)); |
---|
924 | SET_SA_FAMILY(ifra.ifra_addr, AF_INET); |
---|
925 | ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o; |
---|
926 | SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET); |
---|
927 | ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h; |
---|
928 | BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask)); |
---|
929 | if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifra) < 0) { |
---|
930 | if (errno != EADDRNOTAVAIL) |
---|
931 | warn("Couldn't delete interface address: %m"); |
---|
932 | return 0; |
---|
933 | } |
---|
934 | return 1; |
---|
935 | } |
---|
936 | |
---|
937 | /* |
---|
938 | * sifdefaultroute - assign a default route through the address given. |
---|
939 | */ |
---|
940 | int |
---|
941 | sifdefaultroute( |
---|
942 | int u, |
---|
943 | uint32_t l, uint32_t g) |
---|
944 | { |
---|
945 | return dodefaultroute(g, 's'); |
---|
946 | } |
---|
947 | |
---|
948 | /* |
---|
949 | * cifdefaultroute - delete a default route through the address given. |
---|
950 | */ |
---|
951 | int |
---|
952 | cifdefaultroute( |
---|
953 | int u, |
---|
954 | uint32_t l, uint32_t g) |
---|
955 | { |
---|
956 | return dodefaultroute(g, 'c'); |
---|
957 | } |
---|
958 | |
---|
959 | /* |
---|
960 | * dodefaultroute - talk to a routing socket to add/delete a default route. |
---|
961 | */ |
---|
962 | static int |
---|
963 | dodefaultroute( |
---|
964 | uint32_t g, |
---|
965 | int cmd) |
---|
966 | { |
---|
967 | /* int status; */ |
---|
968 | struct sockaddr_in address; |
---|
969 | struct sockaddr_in netmask; |
---|
970 | struct sockaddr_in gateway; |
---|
971 | |
---|
972 | memset((void *) &address, 0, sizeof(address)); |
---|
973 | address.sin_len = sizeof address; |
---|
974 | address.sin_family = AF_INET; |
---|
975 | address.sin_addr.s_addr = INADDR_ANY; |
---|
976 | |
---|
977 | memset((void *) &netmask, 0, sizeof(netmask)); |
---|
978 | netmask.sin_len = sizeof netmask; |
---|
979 | netmask.sin_addr.s_addr = INADDR_ANY; |
---|
980 | netmask.sin_family = AF_INET; |
---|
981 | |
---|
982 | if (cmd=='s') { |
---|
983 | memset((void *) &gateway, 0, sizeof(gateway)); |
---|
984 | gateway.sin_len = sizeof gateway; |
---|
985 | gateway.sin_family = AF_INET; |
---|
986 | gateway.sin_addr.s_addr = g; |
---|
987 | |
---|
988 | rtems_bsdnet_rtrequest(RTM_ADD, |
---|
989 | (struct sockaddr *)&address, |
---|
990 | (struct sockaddr *)&gateway, |
---|
991 | (struct sockaddr *)&netmask, |
---|
992 | (RTF_UP|RTF_GATEWAY|RTF_STATIC), NULL); |
---|
993 | } |
---|
994 | else { |
---|
995 | memset((void *) &gateway, 0, sizeof(gateway)); |
---|
996 | gateway.sin_len = sizeof gateway; |
---|
997 | gateway.sin_family = AF_INET; |
---|
998 | gateway.sin_addr.s_addr = INADDR_ANY; |
---|
999 | |
---|
1000 | rtems_bsdnet_rtrequest(RTM_DELETE, |
---|
1001 | (struct sockaddr *)&address, |
---|
1002 | (struct sockaddr *)&gateway, |
---|
1003 | (struct sockaddr *)&netmask, |
---|
1004 | (RTF_UP|RTF_STATIC), NULL); |
---|
1005 | } |
---|
1006 | |
---|
1007 | default_route_gateway = (cmd == 's')? g: 0; |
---|
1008 | |
---|
1009 | return 1; |
---|
1010 | } |
---|
1011 | |
---|
1012 | #if RTM_VERSION >= 3 |
---|
1013 | |
---|
1014 | /* |
---|
1015 | * sifproxyarp - Make a proxy ARP entry for the peer. |
---|
1016 | */ |
---|
1017 | static struct { |
---|
1018 | struct rt_msghdr hdr; |
---|
1019 | struct sockaddr_inarp dst; |
---|
1020 | struct sockaddr_dl hwa; |
---|
1021 | char extra[128]; |
---|
1022 | } arpmsg; |
---|
1023 | |
---|
1024 | static int arpmsg_valid; |
---|
1025 | |
---|
1026 | int |
---|
1027 | sifproxyarp( |
---|
1028 | int unit, |
---|
1029 | uint32_t hisaddr) |
---|
1030 | { |
---|
1031 | int routes; |
---|
1032 | |
---|
1033 | /* |
---|
1034 | * Get the hardware address of an interface on the same subnet |
---|
1035 | * as our local address. |
---|
1036 | */ |
---|
1037 | memset(&arpmsg, 0, sizeof(arpmsg)); |
---|
1038 | if (!get_ether_addr(hisaddr, &arpmsg.hwa)) { |
---|
1039 | error("Cannot determine ethernet address for proxy ARP"); |
---|
1040 | return 0; |
---|
1041 | } |
---|
1042 | |
---|
1043 | if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) { |
---|
1044 | error("Couldn't add proxy arp entry: socket: %m"); |
---|
1045 | return 0; |
---|
1046 | } |
---|
1047 | |
---|
1048 | arpmsg.hdr.rtm_type = RTM_ADD; |
---|
1049 | arpmsg.hdr.rtm_flags = RTF_ANNOUNCE | RTF_HOST | RTF_STATIC; |
---|
1050 | arpmsg.hdr.rtm_version = RTM_VERSION; |
---|
1051 | arpmsg.hdr.rtm_seq = ++rtm_seq; |
---|
1052 | arpmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY; |
---|
1053 | arpmsg.hdr.rtm_inits = RTV_EXPIRE; |
---|
1054 | arpmsg.dst.sin_len = sizeof(struct sockaddr_inarp); |
---|
1055 | arpmsg.dst.sin_family = AF_INET; |
---|
1056 | arpmsg.dst.sin_addr.s_addr = hisaddr; |
---|
1057 | arpmsg.dst.sin_other = SIN_PROXY; |
---|
1058 | |
---|
1059 | arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg |
---|
1060 | + arpmsg.hwa.sdl_len; |
---|
1061 | if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) { |
---|
1062 | error("Couldn't add proxy arp entry: %m"); |
---|
1063 | close(routes); |
---|
1064 | return 0; |
---|
1065 | } |
---|
1066 | |
---|
1067 | close(routes); |
---|
1068 | arpmsg_valid = 1; |
---|
1069 | proxy_arp_addr = hisaddr; |
---|
1070 | return 1; |
---|
1071 | } |
---|
1072 | |
---|
1073 | /* |
---|
1074 | * cifproxyarp - Delete the proxy ARP entry for the peer. |
---|
1075 | */ |
---|
1076 | int |
---|
1077 | cifproxyarp( |
---|
1078 | int unit, |
---|
1079 | uint32_t hisaddr) |
---|
1080 | { |
---|
1081 | int routes; |
---|
1082 | |
---|
1083 | if (!arpmsg_valid) |
---|
1084 | return 0; |
---|
1085 | arpmsg_valid = 0; |
---|
1086 | |
---|
1087 | arpmsg.hdr.rtm_type = RTM_DELETE; |
---|
1088 | arpmsg.hdr.rtm_seq = ++rtm_seq; |
---|
1089 | |
---|
1090 | if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) { |
---|
1091 | error("Couldn't delete proxy arp entry: socket: %m"); |
---|
1092 | return 0; |
---|
1093 | } |
---|
1094 | |
---|
1095 | if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) { |
---|
1096 | error("Couldn't delete proxy arp entry: %m"); |
---|
1097 | close(routes); |
---|
1098 | return 0; |
---|
1099 | } |
---|
1100 | |
---|
1101 | close(routes); |
---|
1102 | proxy_arp_addr = 0; |
---|
1103 | return 1; |
---|
1104 | } |
---|
1105 | |
---|
1106 | #else /* RTM_VERSION */ |
---|
1107 | |
---|
1108 | /* |
---|
1109 | * sifproxyarp - Make a proxy ARP entry for the peer. |
---|
1110 | */ |
---|
1111 | int |
---|
1112 | sifproxyarp( |
---|
1113 | int unit, |
---|
1114 | uint32_t hisaddr) |
---|
1115 | { |
---|
1116 | struct arpreq arpreq; |
---|
1117 | struct { |
---|
1118 | struct sockaddr_dl sdl; |
---|
1119 | char space[128]; |
---|
1120 | } dls; |
---|
1121 | |
---|
1122 | BZERO(&arpreq, sizeof(arpreq)); |
---|
1123 | |
---|
1124 | /* |
---|
1125 | * Get the hardware address of an interface on the same subnet |
---|
1126 | * as our local address. |
---|
1127 | */ |
---|
1128 | if (!get_ether_addr(hisaddr, &dls.sdl)) { |
---|
1129 | error("Cannot determine ethernet address for proxy ARP"); |
---|
1130 | return 0; |
---|
1131 | } |
---|
1132 | |
---|
1133 | arpreq.arp_ha.sa_len = sizeof(struct sockaddr); |
---|
1134 | arpreq.arp_ha.sa_family = AF_UNSPEC; |
---|
1135 | BCOPY(LLADDR(&dls.sdl), arpreq.arp_ha.sa_data, dls.sdl.sdl_alen); |
---|
1136 | SET_SA_FAMILY(arpreq.arp_pa, AF_INET); |
---|
1137 | ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr; |
---|
1138 | arpreq.arp_flags = ATF_PERM | ATF_PUBL; |
---|
1139 | if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) { |
---|
1140 | error("Couldn't add proxy arp entry: %m"); |
---|
1141 | return 0; |
---|
1142 | } |
---|
1143 | |
---|
1144 | proxy_arp_addr = hisaddr; |
---|
1145 | return 1; |
---|
1146 | } |
---|
1147 | |
---|
1148 | /* |
---|
1149 | * cifproxyarp - Delete the proxy ARP entry for the peer. |
---|
1150 | */ |
---|
1151 | int |
---|
1152 | cifproxyarp( |
---|
1153 | int unit, |
---|
1154 | uint32_t hisaddr) |
---|
1155 | { |
---|
1156 | struct arpreq arpreq; |
---|
1157 | |
---|
1158 | BZERO(&arpreq, sizeof(arpreq)); |
---|
1159 | SET_SA_FAMILY(arpreq.arp_pa, AF_INET); |
---|
1160 | ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr; |
---|
1161 | if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) { |
---|
1162 | warn("Couldn't delete proxy arp entry: %m"); |
---|
1163 | return 0; |
---|
1164 | } |
---|
1165 | proxy_arp_addr = 0; |
---|
1166 | return 1; |
---|
1167 | } |
---|
1168 | #endif /* RTM_VERSION */ |
---|
1169 | |
---|
1170 | |
---|
1171 | /* |
---|
1172 | * get_ether_addr - get the hardware address of an interface on the |
---|
1173 | * the same subnet as ipaddr. |
---|
1174 | */ |
---|
1175 | #define MAX_IFS 32 |
---|
1176 | |
---|
1177 | static int |
---|
1178 | get_ether_addr( |
---|
1179 | uint32_t ipaddr, |
---|
1180 | struct sockaddr_dl *hwaddr) |
---|
1181 | { |
---|
1182 | struct ifreq *ifr, *ifend, *ifp; |
---|
1183 | uint32_t ina, mask; |
---|
1184 | struct sockaddr_dl *dla; |
---|
1185 | struct ifreq ifreq; |
---|
1186 | struct ifconf ifc; |
---|
1187 | struct ifreq ifs[MAX_IFS]; |
---|
1188 | |
---|
1189 | ifc.ifc_len = sizeof(ifs); |
---|
1190 | ifc.ifc_req = ifs; |
---|
1191 | if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) { |
---|
1192 | error("ioctl(SIOCGIFCONF): %m"); |
---|
1193 | return 0; |
---|
1194 | } |
---|
1195 | |
---|
1196 | /* |
---|
1197 | * Scan through looking for an interface with an Internet |
---|
1198 | * address on the same subnet as `ipaddr'. |
---|
1199 | */ |
---|
1200 | ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len); |
---|
1201 | for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *) |
---|
1202 | ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len)) { |
---|
1203 | if (ifr->ifr_addr.sa_family == AF_INET) { |
---|
1204 | ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr; |
---|
1205 | strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name)); |
---|
1206 | /* |
---|
1207 | * Check that the interface is up, and not point-to-point |
---|
1208 | * or loopback. |
---|
1209 | */ |
---|
1210 | if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0) |
---|
1211 | continue; |
---|
1212 | if ((ifreq.ifr_flags & |
---|
1213 | (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP)) |
---|
1214 | != (IFF_UP|IFF_BROADCAST)) |
---|
1215 | continue; |
---|
1216 | /* |
---|
1217 | * Get its netmask and check that it's on the right subnet. |
---|
1218 | */ |
---|
1219 | if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0) |
---|
1220 | continue; |
---|
1221 | mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr; |
---|
1222 | if ((ipaddr & mask) != (ina & mask)) |
---|
1223 | continue; |
---|
1224 | |
---|
1225 | break; |
---|
1226 | } |
---|
1227 | } |
---|
1228 | |
---|
1229 | if (ifr >= ifend) |
---|
1230 | return 0; |
---|
1231 | info("found interface %s for proxy arp", ifr->ifr_name); |
---|
1232 | |
---|
1233 | /* |
---|
1234 | * Now scan through again looking for a link-level address |
---|
1235 | * for this interface. |
---|
1236 | */ |
---|
1237 | ifp = ifr; |
---|
1238 | for (ifr = ifc.ifc_req; ifr < ifend; ) { |
---|
1239 | if (strcmp(ifp->ifr_name, ifr->ifr_name) == 0 |
---|
1240 | && ifr->ifr_addr.sa_family == AF_LINK) { |
---|
1241 | /* |
---|
1242 | * Found the link-level address - copy it out |
---|
1243 | */ |
---|
1244 | dla = (struct sockaddr_dl *) &ifr->ifr_addr; |
---|
1245 | BCOPY(dla, hwaddr, dla->sdl_len); |
---|
1246 | return 1; |
---|
1247 | } |
---|
1248 | ifr = (struct ifreq *) ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len); |
---|
1249 | } |
---|
1250 | |
---|
1251 | return 0; |
---|
1252 | } |
---|
1253 | |
---|
1254 | /* |
---|
1255 | * Return user specified netmask, modified by any mask we might determine |
---|
1256 | * for address `addr' (in network byte order). |
---|
1257 | * Here we scan through the system's list of interfaces, looking for |
---|
1258 | * any non-point-to-point interfaces which might appear to be on the same |
---|
1259 | * network as `addr'. If we find any, we OR in their netmask to the |
---|
1260 | * user-specified netmask. |
---|
1261 | */ |
---|
1262 | uint32_t |
---|
1263 | GetMask( |
---|
1264 | uint32_t addr) |
---|
1265 | { |
---|
1266 | uint32_t mask, nmask, ina; |
---|
1267 | struct ifreq *ifr, *ifend, ifreq; |
---|
1268 | struct ifconf ifc; |
---|
1269 | struct ifreq ifs[MAX_IFS]; |
---|
1270 | |
---|
1271 | addr = ntohl(addr); |
---|
1272 | if (IN_CLASSA(addr)) /* determine network mask for address class */ |
---|
1273 | nmask = IN_CLASSA_NET; |
---|
1274 | else if (IN_CLASSB(addr)) |
---|
1275 | nmask = IN_CLASSB_NET; |
---|
1276 | else |
---|
1277 | nmask = IN_CLASSC_NET; |
---|
1278 | /* class D nets are disallowed by bad_ip_adrs */ |
---|
1279 | mask = netmask | htonl(nmask); |
---|
1280 | |
---|
1281 | /* |
---|
1282 | * Scan through the system's network interfaces. |
---|
1283 | */ |
---|
1284 | ifc.ifc_len = sizeof(ifs); |
---|
1285 | ifc.ifc_req = ifs; |
---|
1286 | if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) { |
---|
1287 | warn("ioctl(SIOCGIFCONF): %m"); |
---|
1288 | return mask; |
---|
1289 | } |
---|
1290 | ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len); |
---|
1291 | for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *) |
---|
1292 | ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len)) { |
---|
1293 | /* |
---|
1294 | * Check the interface's internet address. |
---|
1295 | */ |
---|
1296 | if (ifr->ifr_addr.sa_family != AF_INET) |
---|
1297 | continue; |
---|
1298 | ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr; |
---|
1299 | if ((ntohl(ina) & nmask) != (addr & nmask)) |
---|
1300 | continue; |
---|
1301 | /* |
---|
1302 | * Check that the interface is up, and not point-to-point or loopback. |
---|
1303 | */ |
---|
1304 | strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name)); |
---|
1305 | if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0) |
---|
1306 | continue; |
---|
1307 | if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK)) |
---|
1308 | != IFF_UP) |
---|
1309 | continue; |
---|
1310 | /* |
---|
1311 | * Get its netmask and OR it into our mask. |
---|
1312 | */ |
---|
1313 | if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0) |
---|
1314 | continue; |
---|
1315 | mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr; |
---|
1316 | } |
---|
1317 | |
---|
1318 | return mask; |
---|
1319 | } |
---|
1320 | |
---|
1321 | /* |
---|
1322 | * have_route_to - determine if the system has any route to |
---|
1323 | * a given IP address. |
---|
1324 | * For demand mode to work properly, we have to ignore routes |
---|
1325 | * through our own interface. |
---|
1326 | */ |
---|
1327 | int have_route_to(uint32_t addr) |
---|
1328 | { |
---|
1329 | return -1; |
---|
1330 | } |
---|
1331 | |
---|
1332 | /* |
---|
1333 | * Use the hostid as part of the random number seed. |
---|
1334 | */ |
---|
1335 | int |
---|
1336 | get_host_seed(void) |
---|
1337 | { |
---|
1338 | return 17; |
---|
1339 | } |
---|