network revision 1.18
1#!/bin/sh 2# 3# $NetBSD: network,v 1.18 2000/08/02 13:59:11 itojun Exp $ 4# 5 6# PROVIDE: network 7# REQUIRE: root mountcritlocal tty sysctl 8 9. /etc/rc.subr 10 11name="network" 12start_cmd="network_start" 13stop_cmd="network_stop" 14 15network_start() 16{ 17 # set hostname, turn on network 18 # 19 echo "Starting network." 20 21 # If $hostname is set, use it for my Internet name, 22 # otherwise use /etc/myname 23 # 24 if [ -z "$hostname" -a -f /etc/myname ]; then 25 hostname=`cat /etc/myname` 26 fi 27 if [ -n "$hostname" ]; then 28 echo "Hostname: $hostname" 29 hostname $hostname 30 else 31 # Don't warn about it if we're going to run 32 # DHCP later, as we will probably get the 33 # hostname at that time. 34 # 35 if ! checkyesno dhclient && [ -z "`hostname`" ]; then 36 warn "\$hostname not set." 37 fi 38 fi 39 40 # Check $domainname first, then /etc/defaultdomain, 41 # for NIS/YP domain name 42 # 43 if [ -z "$domainname" -a -f /etc/defaultdomain ]; then 44 domainname=`cat /etc/defaultdomain` 45 fi 46 if [ -n "$domainname" ]; then 47 echo "NIS domainname: $domainname" 48 domainname $domainname 49 fi 50 51 # Flush all routes just to make sure it is clean 52 if checkyesno flushroutes; then 53 route -n flush 54 fi 55 56 # Set the address for the first loopback interface, so that the 57 # auto-route from a newly configured interface's address to lo0 58 # works correctly. 59 # 60 # NOTE: obscure networking problems may occur if lo0 isn't configured... 61 # 62 ifconfig lo0 inet 127.0.0.1 63 64 # According to RFC1122, 127.0.0.0/8 should not leave the node. 65 # 66 route add -inet 127.0.0.0 -netmask 0xff000000 127.0.0.1 -reject 67 68 # Configure all of the network interfaces listed in $net_interfaces; 69 # if $auto_ifconfig is YES, grab all interfaces from ifconfig. 70 # In the following, "xxN" stands in for interface names, like "le0". 71 # For any interfaces that has an $ifconfig_xxN variable associated, 72 # we do "ifconfig xxN $ifconfig_xxN". 73 # If there is no such variable, we take the contents of the file 74 # /etc/ifconfig.xxN, and run "ifconfig xxN" repeatedly, using each 75 # line of the file as the arguments for a seperate "ifconfig" 76 # invocation. 77 # 78 # In order to configure an interface reasonably, you at the very least 79 # need to specify "[addr_family] [hostname]" (e.g "inet my.domain.org"), 80 # and probably a netmask (as in "netmask 0xffffffe0"). You will 81 # frequently need to specify a media type, as in "media UTP", for 82 # interface cards with multiple media connections that do not 83 # autoconfigure. See the ifconfig manual page for details. 84 # 85 # Note that /etc/ifconfig.xxN takes multiple lines. The following 86 # configuration is possible: 87 # inet 10.1.1.1 netmask 0xffffff00 88 # inet 10.1.1.2 netmask 0xffffff00 alias 89 # inet6 fec0::1 prefixlen 64 alias 90 # 91 if [ "$net_interfaces" != NO ]; then 92 if checkyesno auto_ifconfig; then 93 tmp="`ifconfig -l`" 94 for cloner in `ifconfig -C 2>/dev/null`; do 95 for int \ 96 in `/bin/ls /etc/ifconfig.${cloner}[0-9]* 2>/dev/null`; do 97 int=`IFS='.'; set -- $int; echo $2` 98 tmp="$tmp $int" 99 done 100 done 101 else 102 tmp="$net_interfaces" 103 fi 104 echo -n 'Configuring network interfaces:' 105 for int in $tmp; do 106 eval `echo 'args=$ifconfig_'$int` 107 if [ -n "$args" ]; then 108 echo -n " $int" 109 ifconfig $int $args 110 elif [ -f /etc/ifconfig.$int ]; then 111 echo -n " $int" 112 (while read args; do 113 if [ -n "`eval echo '$args'`" ] ; then 114 ifconfig $int $args 115 fi 116 done) < /etc/ifconfig.$int 117 else 118 if ! checkyesno auto_ifconfig; then 119 echo 120 warn \ 121 "/etc/ifconfig.$int missing and ifconfig_$int not set;" 122 warn "interface $int not configured." 123 fi 124 continue 125 fi 126 configured_interfaces="$configured_interfaces $int" 127 done 128 echo "." 129 fi 130 131 # Check $defaultroute, then /etc/mygate, for the name of my gateway 132 # host. That name must be in /etc/hosts. 133 # 134 if [ -z "$defaultroute" -a -f /etc/mygate ]; then 135 defaultroute=`cat /etc/mygate` 136 fi 137 if [ -n "$defaultroute" ]; then 138 route add default $defaultroute 139 fi 140 141 # Check if each configured interface xxN has an $ifaliases_xxN variable 142 # associated, then configure additional IP addresses for that interface. 143 # The variable contains a list of "address netmask" pairs, with 144 # "netmask" set to "-" if the interface default netmask is to be used. 145 # 146 # Note that $ifaliases_xxN works only with certain configurations and 147 # considered not recommended. Use /etc/ifconfig.xxN if possible. 148 # 149 # 150 if [ -n "$configured_interfaces" ]; then 151 echo "Adding interface aliases:" 152 done_aliases_message=yes 153 fi 154 for int in $configured_interfaces; do 155 eval `echo 'args=$ifaliases_'$int` 156 if [ -n "$args" ]; then 157 set -- $args 158 while [ $# -ge 2 ]; do 159 addr=$1 ; net=$2 ; shift 2 160 if [ "$net" = "-" ]; then 161 # for compatibility only, obsolete 162 ifconfig $int inet alias $addr 163 else 164 ifconfig $int inet alias $addr \ 165 netmask $net 166 fi 167 # Use loopback, not the wire 168 route add $addr 127.0.0.1 169 done 170 fi 171 done 172 173 # /etc/ifaliases, if it exists, contains the names of additional IP 174 # addresses for each interface. It is formatted as a series of lines 175 # that contain 176 # address interface netmask 177 # 178 # Note that /etc/ifaliases works only with certain cases only and its 179 # use is not recommended. Use /etc/ifconfig.xxN instead. 180 # 181 # 182 if [ -f /etc/ifaliases ]; then 183 ( 184 if [ "$done_aliases_message" != yes ]; then 185 echo "Adding interface aliases:" 186 fi 187 while read addr int net; do 188 if [ -z "$net" ]; then 189 # for compatibility only, obsolete 190 ifconfig $int inet alias $addr 191 else 192 ifconfig $int inet alias $addr netmask $net 193 fi 194 # use loopback, not the wire 195 route add $addr 127.0.0.1 196 done 197 ) < /etc/ifaliases 198 fi 199 200 # IPv6 201 # Note that manual configuration can be done in the above, using 202 # ifconfig. 203 # 204 if ifconfig lo0 inet6 >/dev/null 2>&1; then 205 # We have IPv6 support in kernel. 206 207 # disallow link-local unicast dest without outgoing scope 208 # identifiers. 209 # 210 route add -inet6 fe80:: -prefixlen 10 ::1 -reject 211 212 # disallow site-local unicast dest without outgoing scope 213 # identifiers. 214 # If you configure site-locals without scope id (it is 215 # permissible config for routers that are not on scope 216 # boundary), you may want to comment the following one out. 217 # 218 route add -inet6 fec0:: -prefixlen 10 ::1 -reject 219 220 # disallow "internal" addresses to appear on the wire. 221 # 222 route add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject 223 224 # disallow packets to malicious IPv4 compatible prefix 225 # 226 route add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject 227 route add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject 228 route add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject 229 route add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject 230 231 # disallow packets to malicious 6to4 prefix 232 # 233 route add -inet6 2002:e000:: -prefixlen 20 ::1 -reject 234 route add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject 235 route add -inet6 2002:0000:: -prefixlen 24 ::1 -reject 236 route add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject 237 238 # Completely disallow packets to IPv4 compatible prefix. 239 # This may conflict with RFC1933 under following circumstances: 240 # (1) An IPv6-only KAME node tries to originate packets to IPv4 241 # comatible destination. The KAME node has no IPv4 242 # compatible support. Under RFC1933, it should transmit 243 # native IPv6 packets toward IPv4 compatible destination, 244 # hoping it would reach a router that forwards the packet 245 # toward auto-tunnel interface. 246 # (2) An IPv6-only node originates a packet to IPv4 compatible 247 # destination. A KAME node is acting as an IPv6 router, and 248 # asked to forward it. 249 # Due to rare use of IPv4 compatible address, and security 250 # issues with it, we disable it by default. 251 # 252 route add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject 253 254 sysctl -w net.inet6.ip6.forwarding=0 >/dev/null 255 sysctl -w net.inet6.ip6.accept_rtadv=0 >/dev/null 256 257 # backward compatibility 258 # 259 if [ -z "$ip6mode" -a -n "$ip6forwarding" ]; then 260 warn 'Please migrate to newer rc.conf' \ 261 '(use ip6mode, not ip6forwarding)' 262 if checkyesno ip6forwarding; then 263 ip6mode=router 264 else 265 if checkyesno rtsol; then 266 ip6mode=autohost 267 else 268 ip6mode=host 269 fi 270 fi 271 fi 272 273 case $ip6mode in 274 router) 275 echo 'IPv6 mode: router' 276 sysctl -w net.inet6.ip6.forwarding=1 >/dev/null 277 ;; 278 279 autohost) 280 echo 'IPv6 mode: autoconfigured host' 281 sysctl -w net.inet6.ip6.accept_rtadv=1 >/dev/null 282 ;; 283 284 host) 285 echo 'IPv6 mode: host' 286 ;; 287 288 *) echo 'WARNING: invalid value in ip6mode' 289 ;; 290 291 esac 292 293 # wait till DAD is completed. always invoke it in case 294 # if are configured manually by ifconfig 295 # 296 dadcount=`sysctl -n net.inet6.ip6.dad_count 2>/dev/null` 297 sleep $dadcount 298 sleep 1 299 300 if checkyesno rtsol; then 301 if [ "$ip6mode" = "autohost" ]; then 302 echo 'Sending router solicitation...' 303 rtsol $rtsol_flags 304 else 305 echo 306 warn \ 307 "ip6mode must be set to 'autohost' to use rtsol." 308 fi 309 310 # wait till DAD is completed, for global addresses 311 # configured by router advert message. 312 # 313 sleep $dadcount 314 sleep 1 315 fi 316 fi 317 318 # XXX this must die 319 if [ -s /etc/netstart.local ]; then 320 sh /etc/netstart.local start 321 fi 322} 323 324network_stop() 325{ 326 echo "Stopping network." 327 328 # XXX this must die 329 if [ -s /etc/netstart.local ]; then 330 sh /etc/netstart.local stop 331 fi 332 333 echo "Deleting aliases." 334 if [ -f /etc/ifaliases ]; then 335 ( 336 while read addr int net; do 337 ifconfig $int inet delete $addr 338 done 339 ) < /etc/ifaliases 340 fi 341 342 for int in $configured_interfaces; do 343 eval `echo 'args=$ifaliases_'$int` 344 if [ -n "$args" ]; then 345 set -- $args 346 while [ $# -ge 2 ]; do 347 addr=$1 ; net=$2 ; shift 2 348 ifconfig $int inet delete $addr 349 done 350 fi 351 done 352 353 # down interfaces 354 # 355 echo -n 'Downing network interfaces:' 356 if [ "$net_interfaces" != NO ]; then 357 if checkyesno auto_ifconfig; then 358 tmp="`ifconfig -l`" 359 else 360 tmp="$net_interfaces" 361 fi 362 for int in $tmp; do 363 eval `echo 'args=$ifconfig_'$int` 364 if [ -n "$args" ] || [ -f /etc/ifconfig.$int ]; then 365 echo -n " $int" 366 ifconfig $int down 367 fi 368 done 369 echo "." 370 fi 371 372 # flush routes 373 # 374 route -n flush 375 376} 377 378load_rc_config $name 379run_rc_command "$1" 380