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 int rtems_bsdnet_microseconds_per_tick; |
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63 | extern rtems_id rtems_pppd_taskid; |
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64 | |
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65 | #include "pppd.h" |
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66 | #include "fsm.h" |
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67 | #include "ipcp.h" |
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68 | |
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69 | static const char rcsid[] = RCSID; |
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70 | |
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71 | |
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72 | static int initdisc = -1; /* Initial TTY discipline for ppp_fd */ |
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73 | static int initfdflags = -1; /* Initial file descriptor flags for ppp_fd */ |
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74 | static int ppp_fd = -1; /* fd which is set to PPP discipline */ |
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75 | static int rtm_seq; |
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76 | |
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77 | static int restore_term; /* 1 => we've munged the terminal */ |
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78 | static struct termios inittermios; /* Initial TTY termios */ |
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79 | static struct winsize wsinfo; /* Initial window size info */ |
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80 | |
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81 | static int loop_slave = -1; |
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82 | static int loop_master; |
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83 | |
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84 | static unsigned char inbuf[512]; /* buffer for chars read from loopback */ |
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85 | |
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86 | static int sockfd; /* socket for doing interface ioctls */ |
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87 | |
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88 | static int if_is_up; /* the interface is currently up */ |
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89 | static u_int32_t ifaddrs[2]; /* local and remote addresses we set */ |
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90 | static u_int32_t default_route_gateway; /* gateway addr for default route */ |
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91 | static u_int32_t proxy_arp_addr; /* remote addr for proxy arp */ |
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92 | |
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93 | /* Prototypes for procedures local to this file. */ |
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94 | static int dodefaultroute __P((u_int32_t, int)); |
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95 | static int get_ether_addr __P((u_int32_t, struct sockaddr_dl *)); |
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96 | |
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97 | |
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98 | void |
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99 | sys_serialcallback(struct termios *tty, void *arg) |
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100 | { |
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101 | rtems_event_send(rtems_pppd_taskid, RTEMS_EVENT_31); |
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102 | } |
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103 | |
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104 | /* |
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105 | * sys_init - System-dependent initialization. |
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106 | */ |
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107 | void |
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108 | sys_init() |
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109 | { |
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110 | /* Get an internet socket for doing socket ioctl's on. */ |
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111 | if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
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112 | fatal("Couldn't create IP socket: %m"); |
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113 | } |
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114 | |
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115 | /* |
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116 | * sys_cleanup - restore any system state we modified before exiting: |
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117 | * mark the interface down, delete default route and/or proxy arp entry. |
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118 | * This should call die() because it's called from die(). |
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119 | */ |
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120 | void |
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121 | sys_cleanup() |
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122 | { |
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123 | struct ifreq ifr; |
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124 | |
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125 | if (if_is_up) { |
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126 | strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); |
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127 | if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0 |
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128 | && ((ifr.ifr_flags & IFF_UP) != 0)) { |
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129 | ifr.ifr_flags &= ~IFF_UP; |
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130 | ioctl(sockfd, SIOCSIFFLAGS, &ifr); |
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131 | } |
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132 | } |
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133 | if (ifaddrs[0] != 0) |
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134 | cifaddr(0, ifaddrs[0], ifaddrs[1]); |
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135 | if (default_route_gateway) |
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136 | cifdefaultroute(0, 0, default_route_gateway); |
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137 | if (proxy_arp_addr) |
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138 | cifproxyarp(0, proxy_arp_addr); |
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139 | } |
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140 | |
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141 | /* |
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142 | * sys_close - Clean up in a child process before execing. |
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143 | */ |
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144 | void |
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145 | sys_close() |
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146 | { |
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147 | close(sockfd); |
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148 | if (loop_slave >= 0) { |
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149 | close(loop_slave); |
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150 | close(loop_master); |
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151 | } |
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152 | } |
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153 | |
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154 | /* |
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155 | * sys_check_options - check the options that the user specified |
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156 | */ |
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157 | int |
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158 | sys_check_options() |
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159 | { |
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160 | return 1; |
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161 | } |
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162 | |
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163 | /* |
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164 | * ppp_available - check whether the system has any ppp interfaces |
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165 | * (in fact we check whether we can do an ioctl on ppp0). |
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166 | */ |
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167 | int |
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168 | ppp_available() |
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169 | { |
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170 | int s, ok; |
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171 | struct ifreq ifr; |
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172 | |
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173 | if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
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174 | return 1; /* can't tell */ |
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175 | |
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176 | strlcpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name)); |
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177 | ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0; |
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178 | close(s); |
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179 | |
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180 | return ok; |
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181 | } |
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182 | |
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183 | /* |
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184 | * establish_ppp - Turn the serial port into a ppp interface. |
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185 | */ |
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186 | int |
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187 | establish_ppp(fd) |
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188 | int fd; |
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189 | { |
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190 | int pppdisc = PPPDISC; |
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191 | int x; |
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192 | |
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193 | if (demand) { |
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194 | /* |
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195 | * Demand mode - prime the old ppp device to relinquish the unit. |
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196 | */ |
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197 | if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0) |
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198 | fatal("ioctl(transfer ppp unit): %m"); |
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199 | } |
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200 | |
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201 | /* |
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202 | * Save the old line discipline of fd, and set it to PPP. |
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203 | */ |
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204 | if (ioctl(fd, TIOCGETD, &initdisc) < 0) |
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205 | fatal("ioctl(TIOCGETD): %m"); |
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206 | if (ioctl(fd, TIOCSETD, &pppdisc) < 0) |
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207 | fatal("ioctl(TIOCSETD): %m"); |
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208 | |
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209 | if (!demand) { |
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210 | /* |
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211 | * Find out which interface we were given. |
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212 | */ |
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213 | if (ioctl(fd, PPPIOCGUNIT, &pppifunit) < 0) |
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214 | fatal("ioctl(PPPIOCGUNIT): %m"); |
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215 | } else { |
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216 | /* |
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217 | * Check that we got the same unit again. |
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218 | */ |
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219 | if (ioctl(fd, PPPIOCGUNIT, &x) < 0) |
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220 | fatal("ioctl(PPPIOCGUNIT): %m"); |
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221 | if (x != pppifunit) |
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222 | fatal("transfer_ppp failed: wanted unit %d, got %d", pppifunit, x); |
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223 | x = TTYDISC; |
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224 | ioctl(loop_slave, TIOCSETD, &x); |
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225 | } |
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226 | |
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227 | ppp_fd = fd; |
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228 | |
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229 | /* |
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230 | * Enable debug in the driver if requested. |
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231 | */ |
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232 | if (kdebugflag) { |
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233 | if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { |
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234 | warn("ioctl (PPPIOCGFLAGS): %m"); |
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235 | } else { |
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236 | x |= (kdebugflag & 0xFF) * SC_DEBUG; |
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237 | if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) |
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238 | warn("ioctl(PPPIOCSFLAGS): %m"); |
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239 | } |
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240 | } |
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241 | |
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242 | /* |
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243 | * Set device for non-blocking reads. |
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244 | */ |
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245 | if ((initfdflags = fcntl(fd, F_GETFL)) == -1 |
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246 | || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) { |
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247 | warn("Couldn't set device to non-blocking mode: %m"); |
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248 | } |
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249 | |
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250 | return fd; |
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251 | } |
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252 | |
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253 | /* |
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254 | * restore_loop - reattach the ppp unit to the loopback. |
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255 | */ |
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256 | void |
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257 | restore_loop() |
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258 | { |
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259 | int x; |
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260 | |
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261 | /* |
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262 | * Transfer the ppp interface back to the loopback. |
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263 | */ |
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264 | if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0) |
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265 | fatal("ioctl(transfer ppp unit): %m"); |
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266 | x = PPPDISC; |
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267 | if (ioctl(loop_slave, TIOCSETD, &x) < 0) |
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268 | fatal("ioctl(TIOCSETD): %m"); |
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269 | |
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270 | /* |
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271 | * Check that we got the same unit again. |
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272 | */ |
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273 | if (ioctl(loop_slave, PPPIOCGUNIT, &x) < 0) |
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274 | fatal("ioctl(PPPIOCGUNIT): %m"); |
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275 | if (x != pppifunit) |
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276 | fatal("transfer_ppp failed: wanted unit %d, got %d", pppifunit, x); |
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277 | ppp_fd = loop_slave; |
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278 | } |
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279 | |
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280 | |
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281 | /* |
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282 | * disestablish_ppp - Restore the serial port to normal operation. |
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283 | * This shouldn't call die() because it's called from die(). |
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284 | */ |
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285 | void |
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286 | disestablish_ppp(fd) |
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287 | int fd; |
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288 | { |
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289 | /* Reset non-blocking mode on fd. */ |
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290 | if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0) |
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291 | warn("Couldn't restore device fd flags: %m"); |
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292 | initfdflags = -1; |
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293 | |
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294 | /* Restore old line discipline. */ |
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295 | if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0) |
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296 | error("ioctl(TIOCSETD): %m"); |
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297 | initdisc = -1; |
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298 | |
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299 | if (fd == ppp_fd) |
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300 | ppp_fd = -1; |
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301 | } |
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302 | |
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303 | /* |
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304 | * Check whether the link seems not to be 8-bit clean. |
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305 | */ |
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306 | void |
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307 | clean_check() |
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308 | { |
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309 | int x; |
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310 | char *s; |
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311 | |
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312 | if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) { |
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313 | s = NULL; |
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314 | switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) { |
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315 | case SC_RCV_B7_0: |
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316 | s = "bit 7 set to 1"; |
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317 | break; |
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318 | case SC_RCV_B7_1: |
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319 | s = "bit 7 set to 0"; |
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320 | break; |
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321 | case SC_RCV_EVNP: |
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322 | s = "odd parity"; |
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323 | break; |
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324 | case SC_RCV_ODDP: |
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325 | s = "even parity"; |
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326 | break; |
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327 | } |
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328 | if (s != NULL) { |
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329 | warn("Serial link is not 8-bit clean:"); |
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330 | warn("All received characters had %s", s); |
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331 | } |
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332 | } |
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333 | } |
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334 | |
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335 | /* |
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336 | * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity, |
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337 | * at the requested speed, etc. If `local' is true, set CLOCAL |
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338 | * regardless of whether the modem option was specified. |
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339 | * |
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340 | * For *BSD, we assume that speed_t values numerically equal bits/second. |
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341 | */ |
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342 | void |
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343 | set_up_tty(fd, local) |
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344 | int fd, local; |
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345 | { |
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346 | struct termios tios; |
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347 | struct ttywakeup wakeup; |
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348 | |
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349 | if (tcgetattr(fd, &tios) < 0) |
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350 | fatal("tcgetattr: %m"); |
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351 | |
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352 | if (!restore_term) { |
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353 | inittermios = tios; |
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354 | ioctl(fd, TIOCGWINSZ, &wsinfo); |
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355 | } |
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356 | |
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357 | tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL); |
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358 | if (crtscts > 0 && !local) { |
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359 | if (crtscts == 2) { |
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360 | #ifdef CDTRCTS |
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361 | tios.c_cflag |= CDTRCTS; |
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362 | #endif |
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363 | } else |
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364 | tios.c_cflag |= CRTSCTS; |
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365 | } else if (crtscts < 0) { |
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366 | tios.c_cflag &= ~CRTSCTS; |
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367 | #ifdef CDTRCTS |
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368 | tios.c_cflag &= ~CDTRCTS; |
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369 | #endif |
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370 | } |
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371 | |
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372 | tios.c_cflag |= CS8 | CREAD | HUPCL; |
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373 | if (local || !modem) |
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374 | tios.c_cflag |= CLOCAL; |
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375 | tios.c_iflag = IGNBRK | IGNPAR; |
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376 | tios.c_oflag = 0; |
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377 | tios.c_lflag = 0; |
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378 | tios.c_cc[VMIN] = 1; |
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379 | tios.c_cc[VTIME] = 0; |
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380 | |
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381 | if (crtscts == -2) { |
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382 | tios.c_iflag |= IXON | IXOFF; |
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383 | tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */ |
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384 | tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */ |
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385 | } |
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386 | |
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387 | if (inspeed) { |
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388 | cfsetospeed(&tios, inspeed); |
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389 | cfsetispeed(&tios, inspeed); |
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390 | } else { |
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391 | inspeed = cfgetospeed(&tios); |
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392 | /* |
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393 | * We can't proceed if the serial port speed is 0, |
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394 | * since that implies that the serial port is disabled. |
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395 | */ |
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396 | if (inspeed == 0) |
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397 | fatal("Baud rate for %s is 0; need explicit baud rate", devnam); |
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398 | } |
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399 | baud_rate = inspeed; |
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400 | |
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401 | /* if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) { */ |
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402 | if (tcsetattr(fd, TCSADRAIN, &tios) < 0) { |
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403 | fatal("tcsetattr: %m"); |
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404 | } |
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405 | |
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406 | /* set up callback function */ |
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407 | wakeup.sw_pfn = sys_serialcallback; |
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408 | wakeup.sw_arg = (void *)fd; |
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409 | ioctl(fd, RTEMS_IO_RCVWAKEUP, &wakeup); |
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410 | |
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411 | restore_term = 1; |
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412 | } |
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413 | |
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414 | /* |
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415 | * restore_tty - restore the terminal to the saved settings. |
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416 | */ |
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417 | void |
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418 | restore_tty(fd) |
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419 | int fd; |
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420 | { |
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421 | if (restore_term) { |
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422 | if (!default_device) { |
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423 | /* |
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424 | * Turn off echoing, because otherwise we can get into |
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425 | * a loop with the tty and the modem echoing to each other. |
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426 | * We presume we are the sole user of this tty device, so |
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427 | * when we close it, it will revert to its defaults anyway. |
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428 | */ |
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429 | inittermios.c_lflag &= ~(ECHO | ECHONL); |
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430 | } |
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431 | /* if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0) { */ |
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432 | if (tcsetattr(fd, TCSADRAIN, &inittermios) < 0) { |
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433 | if (errno != ENXIO) |
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434 | warn("tcsetattr: %m"); |
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435 | } |
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436 | ioctl(fd, TIOCSWINSZ, &wsinfo); |
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437 | restore_term = 0; |
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438 | } |
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439 | } |
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440 | |
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441 | /* |
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442 | * setdtr - control the DTR line on the serial port. |
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443 | * This is called from die(), so it shouldn't call die(). |
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444 | */ |
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445 | void |
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446 | setdtr(fd, on) |
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447 | int fd, on; |
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448 | { |
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449 | int modembits = TIOCM_DTR; |
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450 | |
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451 | ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits); |
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452 | } |
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453 | |
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454 | /* |
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455 | * get_pty - get a pty master/slave pair and chown the slave side |
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456 | * to the uid given. Assumes slave_name points to >= 12 bytes of space. |
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457 | */ |
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458 | int |
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459 | get_pty(master_fdp, slave_fdp, slave_name, uid) |
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460 | int *master_fdp; |
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461 | int *slave_fdp; |
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462 | char *slave_name; |
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463 | int uid; |
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464 | { |
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465 | return 1; |
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466 | } |
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467 | |
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468 | |
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469 | /* |
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470 | * open_ppp_loopback - open the device we use for getting |
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471 | * packets in demand mode, and connect it to a ppp interface. |
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472 | * Here we use a pty. |
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473 | */ |
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474 | int |
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475 | open_ppp_loopback() |
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476 | { |
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477 | return loop_master; |
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478 | } |
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479 | |
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480 | |
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481 | /* |
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482 | * output - Output PPP packet. |
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483 | */ |
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484 | void |
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485 | output(unit, p, len) |
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486 | int unit; |
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487 | u_char *p; |
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488 | int len; |
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489 | { |
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490 | if (debug); |
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491 | dbglog("sent %P", p, len); |
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492 | |
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493 | if (write(ttyfd, p, len) < 0) { |
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494 | if (errno != EIO) |
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495 | error("write: %m"); |
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496 | } |
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497 | } |
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498 | |
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499 | |
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500 | /* |
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501 | * wait_input - wait until there is data available, |
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502 | * for the length of time specified by *timo (indefinite |
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503 | * if timo is NULL). |
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504 | */ |
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505 | void |
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506 | wait_input(timo) |
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507 | struct timeval *timo; |
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508 | { |
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509 | rtems_interval ticks; |
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510 | rtems_event_set events; |
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511 | |
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512 | ticks = ((timo->tv_sec*1000000)+timo->tv_usec)/rtems_bsdnet_microseconds_per_tick; |
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513 | if ( ticks > 0 ) { |
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514 | rtems_event_receive(RTEMS_EVENT_31, (RTEMS_EVENT_ANY|RTEMS_WAIT), ticks, &events); |
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515 | } |
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516 | } |
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517 | |
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518 | /* |
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519 | * read_packet - get a PPP packet from the serial device. |
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520 | */ |
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521 | int |
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522 | read_packet(buf) |
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523 | u_char *buf; |
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524 | { |
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525 | int len; |
---|
526 | |
---|
527 | if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) { |
---|
528 | if (errno == EWOULDBLOCK || errno == EINTR) |
---|
529 | return -1; |
---|
530 | /*fatal("read: %m"); */ |
---|
531 | } |
---|
532 | return len; |
---|
533 | } |
---|
534 | |
---|
535 | |
---|
536 | /* |
---|
537 | * get_loop_output - read characters from the loopback, form them |
---|
538 | * into frames, and detect when we want to bring the real link up. |
---|
539 | * Return value is 1 if we need to bring up the link, 0 otherwise. |
---|
540 | */ |
---|
541 | int |
---|
542 | get_loop_output() |
---|
543 | { |
---|
544 | int rv = 0; |
---|
545 | int n; |
---|
546 | |
---|
547 | while ((n = read(loop_master, inbuf, sizeof(inbuf))) >= 0) { |
---|
548 | if (loop_chars(inbuf, n)) |
---|
549 | rv = 1; |
---|
550 | } |
---|
551 | |
---|
552 | if (n == 0) |
---|
553 | fatal("eof on loopback"); |
---|
554 | if (errno != EWOULDBLOCK) |
---|
555 | fatal("read from loopback: %m"); |
---|
556 | |
---|
557 | return rv; |
---|
558 | } |
---|
559 | |
---|
560 | |
---|
561 | /* |
---|
562 | * ppp_send_config - configure the transmit characteristics of |
---|
563 | * the ppp interface. |
---|
564 | */ |
---|
565 | void |
---|
566 | ppp_send_config(unit, mtu, asyncmap, pcomp, accomp) |
---|
567 | int unit, mtu; |
---|
568 | u_int32_t asyncmap; |
---|
569 | int pcomp, accomp; |
---|
570 | { |
---|
571 | u_int x; |
---|
572 | struct ifreq ifr; |
---|
573 | |
---|
574 | strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); |
---|
575 | ifr.ifr_mtu = mtu; |
---|
576 | if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0) |
---|
577 | fatal("ioctl(SIOCSIFMTU): %m"); |
---|
578 | |
---|
579 | if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) |
---|
580 | fatal("ioctl(PPPIOCSASYNCMAP): %m"); |
---|
581 | |
---|
582 | if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) |
---|
583 | fatal("ioctl (PPPIOCGFLAGS): %m"); |
---|
584 | x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT; |
---|
585 | x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC; |
---|
586 | /* x = sync_serial ? x | SC_SYNC : x & ~SC_SYNC; */ |
---|
587 | if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) |
---|
588 | fatal("ioctl(PPPIOCSFLAGS): %m"); |
---|
589 | } |
---|
590 | |
---|
591 | |
---|
592 | /* |
---|
593 | * ppp_set_xaccm - set the extended transmit ACCM for the interface. |
---|
594 | */ |
---|
595 | void |
---|
596 | ppp_set_xaccm(unit, accm) |
---|
597 | int unit; |
---|
598 | ext_accm accm; |
---|
599 | { |
---|
600 | if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY) |
---|
601 | warn("ioctl(set extended ACCM): %m"); |
---|
602 | } |
---|
603 | |
---|
604 | |
---|
605 | /* |
---|
606 | * ppp_recv_config - configure the receive-side characteristics of |
---|
607 | * the ppp interface. |
---|
608 | */ |
---|
609 | void |
---|
610 | ppp_recv_config(unit, mru, asyncmap, pcomp, accomp) |
---|
611 | int unit, mru; |
---|
612 | u_int32_t asyncmap; |
---|
613 | int pcomp, accomp; |
---|
614 | { |
---|
615 | int x; |
---|
616 | |
---|
617 | if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) |
---|
618 | fatal("ioctl(PPPIOCSMRU): %m"); |
---|
619 | if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) |
---|
620 | fatal("ioctl(PPPIOCSRASYNCMAP): %m"); |
---|
621 | if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) |
---|
622 | fatal("ioctl (PPPIOCGFLAGS): %m"); |
---|
623 | x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC; |
---|
624 | if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) |
---|
625 | fatal("ioctl(PPPIOCSFLAGS): %m"); |
---|
626 | } |
---|
627 | |
---|
628 | /* |
---|
629 | * ccp_test - ask kernel whether a given compression method |
---|
630 | * is acceptable for use. Returns 1 if the method and parameters |
---|
631 | * are OK, 0 if the method is known but the parameters are not OK |
---|
632 | * (e.g. code size should be reduced), or -1 if the method is unknown. |
---|
633 | */ |
---|
634 | int |
---|
635 | ccp_test(unit, opt_ptr, opt_len, for_transmit) |
---|
636 | int unit, opt_len, for_transmit; |
---|
637 | u_char *opt_ptr; |
---|
638 | { |
---|
639 | struct ppp_option_data data; |
---|
640 | |
---|
641 | data.ptr = opt_ptr; |
---|
642 | data.length = opt_len; |
---|
643 | data.transmit = for_transmit; |
---|
644 | if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0) |
---|
645 | return 1; |
---|
646 | return (errno == ENOBUFS)? 0: -1; |
---|
647 | } |
---|
648 | |
---|
649 | /* |
---|
650 | * ccp_flags_set - inform kernel about the current state of CCP. |
---|
651 | */ |
---|
652 | void |
---|
653 | ccp_flags_set(unit, isopen, isup) |
---|
654 | int unit, isopen, isup; |
---|
655 | { |
---|
656 | int x; |
---|
657 | |
---|
658 | if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { |
---|
659 | error("ioctl (PPPIOCGFLAGS): %m"); |
---|
660 | return; |
---|
661 | } |
---|
662 | x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN; |
---|
663 | x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP; |
---|
664 | if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) |
---|
665 | error("ioctl(PPPIOCSFLAGS): %m"); |
---|
666 | } |
---|
667 | |
---|
668 | /* |
---|
669 | * ccp_fatal_error - returns 1 if decompression was disabled as a |
---|
670 | * result of an error detected after decompression of a packet, |
---|
671 | * 0 otherwise. This is necessary because of patent nonsense. |
---|
672 | */ |
---|
673 | int |
---|
674 | ccp_fatal_error(unit) |
---|
675 | int unit; |
---|
676 | { |
---|
677 | int x; |
---|
678 | |
---|
679 | if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { |
---|
680 | error("ioctl(PPPIOCGFLAGS): %m"); |
---|
681 | return 0; |
---|
682 | } |
---|
683 | return x & SC_DC_FERROR; |
---|
684 | } |
---|
685 | |
---|
686 | /* |
---|
687 | * get_idle_time - return how long the link has been idle. |
---|
688 | */ |
---|
689 | int |
---|
690 | get_idle_time(u, ip) |
---|
691 | int u; |
---|
692 | struct ppp_idle *ip; |
---|
693 | { |
---|
694 | return ioctl(ppp_fd, PPPIOCGIDLE, ip) >= 0; |
---|
695 | } |
---|
696 | |
---|
697 | /* |
---|
698 | * get_ppp_stats - return statistics for the link. |
---|
699 | */ |
---|
700 | int |
---|
701 | get_ppp_stats(u, stats) |
---|
702 | int u; |
---|
703 | struct pppd_stats *stats; |
---|
704 | { |
---|
705 | struct ifpppstatsreq req; |
---|
706 | |
---|
707 | memset (&req, 0, sizeof (req)); |
---|
708 | strlcpy(req.ifr_name, ifname, sizeof(req.ifr_name)); |
---|
709 | if (ioctl(sockfd, SIOCGPPPSTATS, &req) < 0) { |
---|
710 | error("Couldn't get PPP statistics: %m"); |
---|
711 | return 0; |
---|
712 | } |
---|
713 | stats->bytes_in = req.stats.p.ppp_ibytes; |
---|
714 | stats->bytes_out = req.stats.p.ppp_obytes; |
---|
715 | return 1; |
---|
716 | } |
---|
717 | |
---|
718 | |
---|
719 | #ifdef PPP_FILTER |
---|
720 | /* |
---|
721 | * set_filters - transfer the pass and active filters to the kernel. |
---|
722 | */ |
---|
723 | int |
---|
724 | set_filters(pass, active) |
---|
725 | struct bpf_program *pass, *active; |
---|
726 | { |
---|
727 | int ret = 1; |
---|
728 | |
---|
729 | if (pass->bf_len > 0) { |
---|
730 | if (ioctl(ppp_fd, PPPIOCSPASS, pass) < 0) { |
---|
731 | error("Couldn't set pass-filter in kernel: %m"); |
---|
732 | ret = 0; |
---|
733 | } |
---|
734 | } |
---|
735 | if (active->bf_len > 0) { |
---|
736 | if (ioctl(ppp_fd, PPPIOCSACTIVE, active) < 0) { |
---|
737 | error("Couldn't set active-filter in kernel: %m"); |
---|
738 | ret = 0; |
---|
739 | } |
---|
740 | } |
---|
741 | return ret; |
---|
742 | } |
---|
743 | #endif |
---|
744 | |
---|
745 | /* |
---|
746 | * sifvjcomp - config tcp header compression |
---|
747 | */ |
---|
748 | int |
---|
749 | sifvjcomp(u, vjcomp, cidcomp, maxcid) |
---|
750 | int u, vjcomp, cidcomp, maxcid; |
---|
751 | { |
---|
752 | u_int x; |
---|
753 | |
---|
754 | if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { |
---|
755 | error("ioctl (PPPIOCGFLAGS): %m"); |
---|
756 | return 0; |
---|
757 | } |
---|
758 | x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP; |
---|
759 | x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID; |
---|
760 | if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) { |
---|
761 | error("ioctl(PPPIOCSFLAGS): %m"); |
---|
762 | return 0; |
---|
763 | } |
---|
764 | if (vjcomp && ioctl(ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) { |
---|
765 | error("ioctl(PPPIOCSFLAGS): %m"); |
---|
766 | return 0; |
---|
767 | } |
---|
768 | return 1; |
---|
769 | } |
---|
770 | |
---|
771 | /* |
---|
772 | * sifup - Config the interface up and enable IP packets to pass. |
---|
773 | */ |
---|
774 | int |
---|
775 | sifup(u) |
---|
776 | int u; |
---|
777 | { |
---|
778 | struct ifreq ifr; |
---|
779 | |
---|
780 | strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); |
---|
781 | if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) { |
---|
782 | error("ioctl (SIOCGIFFLAGS): %m"); |
---|
783 | return 0; |
---|
784 | } |
---|
785 | ifr.ifr_flags |= IFF_UP; |
---|
786 | if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) { |
---|
787 | error("ioctl(SIOCSIFFLAGS): %m"); |
---|
788 | return 0; |
---|
789 | } |
---|
790 | if_is_up = 1; |
---|
791 | return 1; |
---|
792 | } |
---|
793 | |
---|
794 | /* |
---|
795 | * sifnpmode - Set the mode for handling packets for a given NP. |
---|
796 | */ |
---|
797 | int |
---|
798 | sifnpmode(u, proto, mode) |
---|
799 | int u; |
---|
800 | int proto; |
---|
801 | enum NPmode mode; |
---|
802 | { |
---|
803 | struct npioctl npi; |
---|
804 | |
---|
805 | npi.protocol = proto; |
---|
806 | npi.mode = mode; |
---|
807 | if (ioctl(ppp_fd, PPPIOCSNPMODE, &npi) < 0) { |
---|
808 | error("ioctl(set NP %d mode to %d): %m", proto, mode); |
---|
809 | return 0; |
---|
810 | } |
---|
811 | return 1; |
---|
812 | } |
---|
813 | |
---|
814 | /* |
---|
815 | * sifdown - Config the interface down and disable IP. |
---|
816 | */ |
---|
817 | int |
---|
818 | sifdown(u) |
---|
819 | int u; |
---|
820 | { |
---|
821 | struct ifreq ifr; |
---|
822 | int rv; |
---|
823 | struct npioctl npi; |
---|
824 | |
---|
825 | rv = 1; |
---|
826 | npi.protocol = PPP_IP; |
---|
827 | npi.mode = NPMODE_ERROR; |
---|
828 | ioctl(ppp_fd, PPPIOCSNPMODE, (caddr_t) &npi); |
---|
829 | /* ignore errors, because ppp_fd might have been closed by now. */ |
---|
830 | |
---|
831 | strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); |
---|
832 | if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) { |
---|
833 | error("ioctl (SIOCGIFFLAGS): %m"); |
---|
834 | rv = 0; |
---|
835 | } else { |
---|
836 | ifr.ifr_flags &= ~IFF_UP; |
---|
837 | if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) { |
---|
838 | error("ioctl(SIOCSIFFLAGS): %m"); |
---|
839 | rv = 0; |
---|
840 | } else |
---|
841 | if_is_up = 0; |
---|
842 | } |
---|
843 | return rv; |
---|
844 | } |
---|
845 | |
---|
846 | /* |
---|
847 | * SET_SA_FAMILY - set the sa_family field of a struct sockaddr, |
---|
848 | * if it exists. |
---|
849 | */ |
---|
850 | #define SET_SA_FAMILY(addr, family) \ |
---|
851 | BZERO((char *) &(addr), sizeof(addr)); \ |
---|
852 | addr.sa_family = (family); \ |
---|
853 | addr.sa_len = sizeof(addr); |
---|
854 | |
---|
855 | /* |
---|
856 | * sifaddr - Config the interface IP addresses and netmask. |
---|
857 | */ |
---|
858 | int |
---|
859 | sifaddr(u, o, h, m) |
---|
860 | int u; |
---|
861 | u_int32_t o, h, m; |
---|
862 | { |
---|
863 | struct ifaliasreq ifra; |
---|
864 | struct ifreq ifr; |
---|
865 | |
---|
866 | strlcpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name)); |
---|
867 | SET_SA_FAMILY(ifra.ifra_addr, AF_INET); |
---|
868 | ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o; |
---|
869 | SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET); |
---|
870 | ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h; |
---|
871 | if (m != 0) { |
---|
872 | SET_SA_FAMILY(ifra.ifra_mask, AF_INET); |
---|
873 | ((struct sockaddr_in *) &ifra.ifra_mask)->sin_addr.s_addr = m; |
---|
874 | } else |
---|
875 | BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask)); |
---|
876 | BZERO(&ifr, sizeof(ifr)); |
---|
877 | strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); |
---|
878 | if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifr) < 0) { |
---|
879 | if (errno != EADDRNOTAVAIL) |
---|
880 | warn("Couldn't remove interface address: %m"); |
---|
881 | } |
---|
882 | if (ioctl(sockfd, SIOCAIFADDR, (caddr_t) &ifra) < 0) { |
---|
883 | if (errno != EEXIST) { |
---|
884 | error("Couldn't set interface address: %m"); |
---|
885 | return 0; |
---|
886 | } |
---|
887 | warn("Couldn't set interface address: Address %I already exists", o); |
---|
888 | } |
---|
889 | ifaddrs[0] = o; |
---|
890 | ifaddrs[1] = h; |
---|
891 | return 1; |
---|
892 | } |
---|
893 | |
---|
894 | /* |
---|
895 | * cifaddr - Clear the interface IP addresses, and delete routes |
---|
896 | * through the interface if possible. |
---|
897 | */ |
---|
898 | int |
---|
899 | cifaddr(u, o, h) |
---|
900 | int u; |
---|
901 | u_int32_t o, h; |
---|
902 | { |
---|
903 | struct ifaliasreq ifra; |
---|
904 | |
---|
905 | ifaddrs[0] = 0; |
---|
906 | strlcpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name)); |
---|
907 | SET_SA_FAMILY(ifra.ifra_addr, AF_INET); |
---|
908 | ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o; |
---|
909 | SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET); |
---|
910 | ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h; |
---|
911 | BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask)); |
---|
912 | if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifra) < 0) { |
---|
913 | if (errno != EADDRNOTAVAIL) |
---|
914 | warn("Couldn't delete interface address: %m"); |
---|
915 | return 0; |
---|
916 | } |
---|
917 | return 1; |
---|
918 | } |
---|
919 | |
---|
920 | /* |
---|
921 | * sifdefaultroute - assign a default route through the address given. |
---|
922 | */ |
---|
923 | int |
---|
924 | sifdefaultroute(u, l, g) |
---|
925 | int u; |
---|
926 | u_int32_t l, g; |
---|
927 | { |
---|
928 | return dodefaultroute(g, 's'); |
---|
929 | } |
---|
930 | |
---|
931 | /* |
---|
932 | * cifdefaultroute - delete a default route through the address given. |
---|
933 | */ |
---|
934 | int |
---|
935 | cifdefaultroute(u, l, g) |
---|
936 | int u; |
---|
937 | u_int32_t l, g; |
---|
938 | { |
---|
939 | return dodefaultroute(g, 'c'); |
---|
940 | } |
---|
941 | |
---|
942 | /* |
---|
943 | * dodefaultroute - talk to a routing socket to add/delete a default route. |
---|
944 | */ |
---|
945 | static int |
---|
946 | dodefaultroute(g, cmd) |
---|
947 | u_int32_t g; |
---|
948 | int cmd; |
---|
949 | { |
---|
950 | int status; |
---|
951 | struct sockaddr_in address; |
---|
952 | struct sockaddr_in netmask; |
---|
953 | struct sockaddr_in gateway; |
---|
954 | |
---|
955 | memset((void *) &address, 0, sizeof(address)); |
---|
956 | address.sin_len = sizeof address; |
---|
957 | address.sin_family = AF_INET; |
---|
958 | address.sin_addr.s_addr = INADDR_ANY; |
---|
959 | |
---|
960 | memset((void *) &netmask, 0, sizeof(netmask)); |
---|
961 | netmask.sin_len = sizeof netmask; |
---|
962 | netmask.sin_addr.s_addr = INADDR_ANY; |
---|
963 | netmask.sin_family = AF_INET; |
---|
964 | |
---|
965 | if (cmd=='s') { |
---|
966 | memset((void *) &gateway, 0, sizeof(gateway)); |
---|
967 | gateway.sin_len = sizeof gateway; |
---|
968 | gateway.sin_family = AF_INET; |
---|
969 | gateway.sin_addr.s_addr = g; |
---|
970 | |
---|
971 | rtems_bsdnet_rtrequest(RTM_ADD, |
---|
972 | (struct sockaddr *)&address, |
---|
973 | (struct sockaddr *)&gateway, |
---|
974 | (struct sockaddr *)&netmask, |
---|
975 | (RTF_UP|RTF_GATEWAY|RTF_STATIC), NULL); |
---|
976 | } |
---|
977 | else { |
---|
978 | memset((void *) &gateway, 0, sizeof(gateway)); |
---|
979 | gateway.sin_len = sizeof gateway; |
---|
980 | gateway.sin_family = AF_INET; |
---|
981 | gateway.sin_addr.s_addr = INADDR_ANY; |
---|
982 | |
---|
983 | rtems_bsdnet_rtrequest(RTM_DELETE, |
---|
984 | (struct sockaddr *)&address, |
---|
985 | (struct sockaddr *)&gateway, |
---|
986 | (struct sockaddr *)&netmask, |
---|
987 | (RTF_UP|RTF_STATIC), NULL); |
---|
988 | } |
---|
989 | |
---|
990 | default_route_gateway = (cmd == 's')? g: 0; |
---|
991 | |
---|
992 | return 1; |
---|
993 | } |
---|
994 | |
---|
995 | #if RTM_VERSION >= 3 |
---|
996 | |
---|
997 | /* |
---|
998 | * sifproxyarp - Make a proxy ARP entry for the peer. |
---|
999 | */ |
---|
1000 | static struct { |
---|
1001 | struct rt_msghdr hdr; |
---|
1002 | struct sockaddr_inarp dst; |
---|
1003 | struct sockaddr_dl hwa; |
---|
1004 | char extra[128]; |
---|
1005 | } arpmsg; |
---|
1006 | |
---|
1007 | static int arpmsg_valid; |
---|
1008 | |
---|
1009 | int |
---|
1010 | sifproxyarp(unit, hisaddr) |
---|
1011 | int unit; |
---|
1012 | u_int32_t hisaddr; |
---|
1013 | { |
---|
1014 | int routes; |
---|
1015 | |
---|
1016 | /* |
---|
1017 | * Get the hardware address of an interface on the same subnet |
---|
1018 | * as our local address. |
---|
1019 | */ |
---|
1020 | memset(&arpmsg, 0, sizeof(arpmsg)); |
---|
1021 | if (!get_ether_addr(hisaddr, &arpmsg.hwa)) { |
---|
1022 | error("Cannot determine ethernet address for proxy ARP"); |
---|
1023 | return 0; |
---|
1024 | } |
---|
1025 | |
---|
1026 | if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) { |
---|
1027 | error("Couldn't add proxy arp entry: socket: %m"); |
---|
1028 | return 0; |
---|
1029 | } |
---|
1030 | |
---|
1031 | arpmsg.hdr.rtm_type = RTM_ADD; |
---|
1032 | arpmsg.hdr.rtm_flags = RTF_ANNOUNCE | RTF_HOST | RTF_STATIC; |
---|
1033 | arpmsg.hdr.rtm_version = RTM_VERSION; |
---|
1034 | arpmsg.hdr.rtm_seq = ++rtm_seq; |
---|
1035 | arpmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY; |
---|
1036 | arpmsg.hdr.rtm_inits = RTV_EXPIRE; |
---|
1037 | arpmsg.dst.sin_len = sizeof(struct sockaddr_inarp); |
---|
1038 | arpmsg.dst.sin_family = AF_INET; |
---|
1039 | arpmsg.dst.sin_addr.s_addr = hisaddr; |
---|
1040 | arpmsg.dst.sin_other = SIN_PROXY; |
---|
1041 | |
---|
1042 | arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg |
---|
1043 | + arpmsg.hwa.sdl_len; |
---|
1044 | if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) { |
---|
1045 | error("Couldn't add proxy arp entry: %m"); |
---|
1046 | close(routes); |
---|
1047 | return 0; |
---|
1048 | } |
---|
1049 | |
---|
1050 | close(routes); |
---|
1051 | arpmsg_valid = 1; |
---|
1052 | proxy_arp_addr = hisaddr; |
---|
1053 | return 1; |
---|
1054 | } |
---|
1055 | |
---|
1056 | /* |
---|
1057 | * cifproxyarp - Delete the proxy ARP entry for the peer. |
---|
1058 | */ |
---|
1059 | int |
---|
1060 | cifproxyarp(unit, hisaddr) |
---|
1061 | int unit; |
---|
1062 | u_int32_t hisaddr; |
---|
1063 | { |
---|
1064 | int routes; |
---|
1065 | |
---|
1066 | if (!arpmsg_valid) |
---|
1067 | return 0; |
---|
1068 | arpmsg_valid = 0; |
---|
1069 | |
---|
1070 | arpmsg.hdr.rtm_type = RTM_DELETE; |
---|
1071 | arpmsg.hdr.rtm_seq = ++rtm_seq; |
---|
1072 | |
---|
1073 | if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) { |
---|
1074 | error("Couldn't delete proxy arp entry: socket: %m"); |
---|
1075 | return 0; |
---|
1076 | } |
---|
1077 | |
---|
1078 | if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) { |
---|
1079 | error("Couldn't delete proxy arp entry: %m"); |
---|
1080 | close(routes); |
---|
1081 | return 0; |
---|
1082 | } |
---|
1083 | |
---|
1084 | close(routes); |
---|
1085 | proxy_arp_addr = 0; |
---|
1086 | return 1; |
---|
1087 | } |
---|
1088 | |
---|
1089 | #else /* RTM_VERSION */ |
---|
1090 | |
---|
1091 | /* |
---|
1092 | * sifproxyarp - Make a proxy ARP entry for the peer. |
---|
1093 | */ |
---|
1094 | int |
---|
1095 | sifproxyarp(unit, hisaddr) |
---|
1096 | int unit; |
---|
1097 | u_int32_t hisaddr; |
---|
1098 | { |
---|
1099 | struct arpreq arpreq; |
---|
1100 | struct { |
---|
1101 | struct sockaddr_dl sdl; |
---|
1102 | char space[128]; |
---|
1103 | } dls; |
---|
1104 | |
---|
1105 | BZERO(&arpreq, sizeof(arpreq)); |
---|
1106 | |
---|
1107 | /* |
---|
1108 | * Get the hardware address of an interface on the same subnet |
---|
1109 | * as our local address. |
---|
1110 | */ |
---|
1111 | if (!get_ether_addr(hisaddr, &dls.sdl)) { |
---|
1112 | error("Cannot determine ethernet address for proxy ARP"); |
---|
1113 | return 0; |
---|
1114 | } |
---|
1115 | |
---|
1116 | arpreq.arp_ha.sa_len = sizeof(struct sockaddr); |
---|
1117 | arpreq.arp_ha.sa_family = AF_UNSPEC; |
---|
1118 | BCOPY(LLADDR(&dls.sdl), arpreq.arp_ha.sa_data, dls.sdl.sdl_alen); |
---|
1119 | SET_SA_FAMILY(arpreq.arp_pa, AF_INET); |
---|
1120 | ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr; |
---|
1121 | arpreq.arp_flags = ATF_PERM | ATF_PUBL; |
---|
1122 | if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) { |
---|
1123 | error("Couldn't add proxy arp entry: %m"); |
---|
1124 | return 0; |
---|
1125 | } |
---|
1126 | |
---|
1127 | proxy_arp_addr = hisaddr; |
---|
1128 | return 1; |
---|
1129 | } |
---|
1130 | |
---|
1131 | /* |
---|
1132 | * cifproxyarp - Delete the proxy ARP entry for the peer. |
---|
1133 | */ |
---|
1134 | int |
---|
1135 | cifproxyarp(unit, hisaddr) |
---|
1136 | int unit; |
---|
1137 | u_int32_t hisaddr; |
---|
1138 | { |
---|
1139 | struct arpreq arpreq; |
---|
1140 | |
---|
1141 | BZERO(&arpreq, sizeof(arpreq)); |
---|
1142 | SET_SA_FAMILY(arpreq.arp_pa, AF_INET); |
---|
1143 | ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr; |
---|
1144 | if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) { |
---|
1145 | warn("Couldn't delete proxy arp entry: %m"); |
---|
1146 | return 0; |
---|
1147 | } |
---|
1148 | proxy_arp_addr = 0; |
---|
1149 | return 1; |
---|
1150 | } |
---|
1151 | #endif /* RTM_VERSION */ |
---|
1152 | |
---|
1153 | |
---|
1154 | /* |
---|
1155 | * get_ether_addr - get the hardware address of an interface on the |
---|
1156 | * the same subnet as ipaddr. |
---|
1157 | */ |
---|
1158 | #define MAX_IFS 32 |
---|
1159 | |
---|
1160 | static int |
---|
1161 | get_ether_addr(ipaddr, hwaddr) |
---|
1162 | u_int32_t ipaddr; |
---|
1163 | struct sockaddr_dl *hwaddr; |
---|
1164 | { |
---|
1165 | struct ifreq *ifr, *ifend, *ifp; |
---|
1166 | u_int32_t ina, mask; |
---|
1167 | struct sockaddr_dl *dla; |
---|
1168 | struct ifreq ifreq; |
---|
1169 | struct ifconf ifc; |
---|
1170 | struct ifreq ifs[MAX_IFS]; |
---|
1171 | |
---|
1172 | ifc.ifc_len = sizeof(ifs); |
---|
1173 | ifc.ifc_req = ifs; |
---|
1174 | if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) { |
---|
1175 | error("ioctl(SIOCGIFCONF): %m"); |
---|
1176 | return 0; |
---|
1177 | } |
---|
1178 | |
---|
1179 | /* |
---|
1180 | * Scan through looking for an interface with an Internet |
---|
1181 | * address on the same subnet as `ipaddr'. |
---|
1182 | */ |
---|
1183 | ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len); |
---|
1184 | for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *) |
---|
1185 | ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len)) { |
---|
1186 | if (ifr->ifr_addr.sa_family == AF_INET) { |
---|
1187 | ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr; |
---|
1188 | strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name)); |
---|
1189 | /* |
---|
1190 | * Check that the interface is up, and not point-to-point |
---|
1191 | * or loopback. |
---|
1192 | */ |
---|
1193 | if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0) |
---|
1194 | continue; |
---|
1195 | if ((ifreq.ifr_flags & |
---|
1196 | (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP)) |
---|
1197 | != (IFF_UP|IFF_BROADCAST)) |
---|
1198 | continue; |
---|
1199 | /* |
---|
1200 | * Get its netmask and check that it's on the right subnet. |
---|
1201 | */ |
---|
1202 | if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0) |
---|
1203 | continue; |
---|
1204 | mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr; |
---|
1205 | if ((ipaddr & mask) != (ina & mask)) |
---|
1206 | continue; |
---|
1207 | |
---|
1208 | break; |
---|
1209 | } |
---|
1210 | } |
---|
1211 | |
---|
1212 | if (ifr >= ifend) |
---|
1213 | return 0; |
---|
1214 | info("found interface %s for proxy arp", ifr->ifr_name); |
---|
1215 | |
---|
1216 | /* |
---|
1217 | * Now scan through again looking for a link-level address |
---|
1218 | * for this interface. |
---|
1219 | */ |
---|
1220 | ifp = ifr; |
---|
1221 | for (ifr = ifc.ifc_req; ifr < ifend; ) { |
---|
1222 | if (strcmp(ifp->ifr_name, ifr->ifr_name) == 0 |
---|
1223 | && ifr->ifr_addr.sa_family == AF_LINK) { |
---|
1224 | /* |
---|
1225 | * Found the link-level address - copy it out |
---|
1226 | */ |
---|
1227 | dla = (struct sockaddr_dl *) &ifr->ifr_addr; |
---|
1228 | BCOPY(dla, hwaddr, dla->sdl_len); |
---|
1229 | return 1; |
---|
1230 | } |
---|
1231 | ifr = (struct ifreq *) ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len); |
---|
1232 | } |
---|
1233 | |
---|
1234 | return 0; |
---|
1235 | } |
---|
1236 | |
---|
1237 | /* |
---|
1238 | * Return user specified netmask, modified by any mask we might determine |
---|
1239 | * for address `addr' (in network byte order). |
---|
1240 | * Here we scan through the system's list of interfaces, looking for |
---|
1241 | * any non-point-to-point interfaces which might appear to be on the same |
---|
1242 | * network as `addr'. If we find any, we OR in their netmask to the |
---|
1243 | * user-specified netmask. |
---|
1244 | */ |
---|
1245 | u_int32_t |
---|
1246 | GetMask(addr) |
---|
1247 | u_int32_t addr; |
---|
1248 | { |
---|
1249 | u_int32_t mask, nmask, ina; |
---|
1250 | struct ifreq *ifr, *ifend, ifreq; |
---|
1251 | struct ifconf ifc; |
---|
1252 | struct ifreq ifs[MAX_IFS]; |
---|
1253 | |
---|
1254 | addr = ntohl(addr); |
---|
1255 | if (IN_CLASSA(addr)) /* determine network mask for address class */ |
---|
1256 | nmask = IN_CLASSA_NET; |
---|
1257 | else if (IN_CLASSB(addr)) |
---|
1258 | nmask = IN_CLASSB_NET; |
---|
1259 | else |
---|
1260 | nmask = IN_CLASSC_NET; |
---|
1261 | /* class D nets are disallowed by bad_ip_adrs */ |
---|
1262 | mask = netmask | htonl(nmask); |
---|
1263 | |
---|
1264 | /* |
---|
1265 | * Scan through the system's network interfaces. |
---|
1266 | */ |
---|
1267 | ifc.ifc_len = sizeof(ifs); |
---|
1268 | ifc.ifc_req = ifs; |
---|
1269 | if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) { |
---|
1270 | warn("ioctl(SIOCGIFCONF): %m"); |
---|
1271 | return mask; |
---|
1272 | } |
---|
1273 | ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len); |
---|
1274 | for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *) |
---|
1275 | ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len)) { |
---|
1276 | /* |
---|
1277 | * Check the interface's internet address. |
---|
1278 | */ |
---|
1279 | if (ifr->ifr_addr.sa_family != AF_INET) |
---|
1280 | continue; |
---|
1281 | ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr; |
---|
1282 | if ((ntohl(ina) & nmask) != (addr & nmask)) |
---|
1283 | continue; |
---|
1284 | /* |
---|
1285 | * Check that the interface is up, and not point-to-point or loopback. |
---|
1286 | */ |
---|
1287 | strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name)); |
---|
1288 | if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0) |
---|
1289 | continue; |
---|
1290 | if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK)) |
---|
1291 | != IFF_UP) |
---|
1292 | continue; |
---|
1293 | /* |
---|
1294 | * Get its netmask and OR it into our mask. |
---|
1295 | */ |
---|
1296 | if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0) |
---|
1297 | continue; |
---|
1298 | mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr; |
---|
1299 | } |
---|
1300 | |
---|
1301 | return mask; |
---|
1302 | } |
---|
1303 | |
---|
1304 | /* |
---|
1305 | * have_route_to - determine if the system has any route to |
---|
1306 | * a given IP address. |
---|
1307 | * For demand mode to work properly, we have to ignore routes |
---|
1308 | * through our own interface. |
---|
1309 | */ |
---|
1310 | int have_route_to(u_int32_t addr) |
---|
1311 | { |
---|
1312 | return -1; |
---|
1313 | } |
---|
1314 | |
---|
1315 | /* |
---|
1316 | * Use the hostid as part of the random number seed. |
---|
1317 | */ |
---|
1318 | int |
---|
1319 | get_host_seed() |
---|
1320 | { |
---|
1321 | return 17; |
---|
1322 | } |
---|