network revision 1.27
1#!/bin/sh 2# 3# $NetBSD: network,v 1.27 2000/11/26 06:46:42 nisimura Exp $ 4# 5 6# PROVIDE: network 7# REQUIRE: ipfilter ipsec mountcritlocal root 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" ] && [ -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" ] && [ -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 in /etc/ifconfig.${cloner}[0-9]*; do 96 [ ! -f $int ] && break 97 tmp="$tmp ${int##*.}" 98 done 99 done 100 else 101 tmp="$net_interfaces" 102 fi 103 echo -n 'Configuring network interfaces:' 104 for int in $tmp; do 105 eval args=\$ifconfig_$int 106 if [ -n "$args" ]; then 107 echo -n " $int" 108 ifconfig $int $args 109 elif [ -f /etc/ifconfig.$int ]; then 110 echo -n " $int" 111 while read args; do 112 [ -z "$args" ] && continue 113 ifconfig $int $args 114 done < /etc/ifconfig.$int 115 else 116 if ! checkyesno auto_ifconfig; then 117 echo 118 warn \ 119 "/etc/ifconfig.$int missing and ifconfig_$int not set;" 120 warn "interface $int not configured." 121 fi 122 continue 123 fi 124 configured_interfaces="$configured_interfaces $int" 125 done 126 echo "." 127 fi 128 129 # Check $defaultroute, then /etc/mygate, for the name of my gateway 130 # host. That name must be in /etc/hosts. 131 # 132 if [ -z "$defaultroute" ] && [ -f /etc/mygate ]; then 133 defaultroute=`cat /etc/mygate` 134 fi 135 if [ -n "$defaultroute" ]; then 136 route add default $defaultroute 137 fi 138 139 # Check if each configured interface xxN has an $ifaliases_xxN variable 140 # associated, then configure additional IP addresses for that interface. 141 # The variable contains a list of "address netmask" pairs, with 142 # "netmask" set to "-" if the interface default netmask is to be used. 143 # 144 # Note that $ifaliases_xxN works only with certain configurations and 145 # considered not recommended. Use /etc/ifconfig.xxN if possible. 146 # 147 # 148 if [ -n "$configured_interfaces" ]; then 149 echo "Adding interface aliases:" 150 done_aliases_message=yes 151 fi 152 for int in $configured_interfaces; do 153 eval args=\$ifaliases_$int 154 if [ -n "$args" ]; then 155 set -- $args 156 while [ $# -ge 2 ]; do 157 addr=$1 ; net=$2 ; shift 2 158 if [ "$net" = "-" ]; then 159 # for compatibility only, obsolete 160 ifconfig $int inet alias $addr 161 else 162 ifconfig $int inet alias $addr \ 163 netmask $net 164 fi 165 # Use loopback, not the wire 166 route add $addr 127.0.0.1 167 done 168 fi 169 done 170 171 # /etc/ifaliases, if it exists, contains the names of additional IP 172 # addresses for each interface. It is formatted as a series of lines 173 # that contain 174 # address interface netmask 175 # 176 # Note that /etc/ifaliases works only with certain cases only and its 177 # use is not recommended. Use /etc/ifconfig.xxN instead. 178 # 179 # 180 if [ -f /etc/ifaliases ]; then 181 if [ "$done_aliases_message" != yes ]; then 182 echo "Adding interface aliases:" 183 fi 184 while read addr int net; do 185 if [ -z "$net" ]; then 186 # for compatibility only, obsolete 187 ifconfig $int inet alias $addr 188 else 189 ifconfig $int inet alias $addr netmask $net 190 fi 191 # use loopback, not the wire 192 route add $addr 127.0.0.1 193 done < /etc/ifaliases 194 fi 195 196 # IPv6 197 # Note that manual configuration can be done in the above, using 198 # ifconfig. 199 # 200 if ifconfig lo0 inet6 >/dev/null 2>&1; then 201 # We have IPv6 support in kernel. 202 203 # disallow link-local unicast dest without outgoing scope 204 # identifiers. 205 # 206 route add -inet6 fe80:: -prefixlen 10 ::1 -reject 207 208 # disallow site-local unicast dest without outgoing scope 209 # identifiers. 210 # If you configure site-locals without scope id (it is 211 # permissible config for routers that are not on scope 212 # boundary), you may want to comment the following one out. 213 # 214 route add -inet6 fec0:: -prefixlen 10 ::1 -reject 215 216 # disallow "internal" addresses to appear on the wire. 217 # 218 route add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject 219 220 # disallow packets to malicious IPv4 compatible prefix 221 # 222 route add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject 223 route add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject 224 route add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject 225 route add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject 226 227 # disallow packets to malicious 6to4 prefix 228 # 229 route add -inet6 2002:e000:: -prefixlen 20 ::1 -reject 230 route add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject 231 route add -inet6 2002:0000:: -prefixlen 24 ::1 -reject 232 route add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject 233 234 # Completely disallow packets to IPv4 compatible prefix. 235 # This may conflict with RFC1933 under following circumstances: 236 # (1) An IPv6-only KAME node tries to originate packets to IPv4 237 # comatible destination. The KAME node has no IPv4 238 # compatible support. Under RFC1933, it should transmit 239 # native IPv6 packets toward IPv4 compatible destination, 240 # hoping it would reach a router that forwards the packet 241 # toward auto-tunnel interface. 242 # (2) An IPv6-only node originates a packet to IPv4 compatible 243 # destination. A KAME node is acting as an IPv6 router, and 244 # asked to forward it. 245 # Due to rare use of IPv4 compatible address, and security 246 # issues with it, we disable it by default. 247 # 248 route add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject 249 250 sysctl -w net.inet6.ip6.forwarding=0 >/dev/null 251 sysctl -w net.inet6.ip6.accept_rtadv=0 >/dev/null 252 253 # backward compatibility 254 # 255 if [ -z "$ip6mode" ] && [ -n "$ip6forwarding" ]; then 256 warn 'Please migrate to newer rc.conf' \ 257 '(use ip6mode, not ip6forwarding)' 258 if checkyesno ip6forwarding; then 259 ip6mode=router 260 elif checkyesno rtsol; then 261 ip6mode=autohost 262 else 263 ip6mode=host 264 fi 265 fi 266 267 case $ip6mode in 268 router) 269 echo 'IPv6 mode: router' 270 sysctl -w net.inet6.ip6.forwarding=1 >/dev/null 271 ;; 272 273 autohost) 274 echo 'IPv6 mode: autoconfigured host' 275 sysctl -w net.inet6.ip6.accept_rtadv=1 >/dev/null 276 ;; 277 278 host) 279 echo 'IPv6 mode: host' 280 ;; 281 282 *) echo 'WARNING: invalid value in ip6mode' 283 ;; 284 285 esac 286 287 # wait till DAD is completed. always invoke it in case 288 # if are configured manually by ifconfig 289 # 290 dadcount=`sysctl -n net.inet6.ip6.dad_count 2>/dev/null` 291 sleep $dadcount 292 sleep 1 293 294 if checkyesno rtsol; then 295 if [ "$ip6mode" = "autohost" ]; then 296 echo 'Sending router solicitation...' 297 rtsol $rtsol_flags 298 else 299 echo 300 warn \ 301 "ip6mode must be set to 'autohost' to use rtsol." 302 fi 303 304 # wait till DAD is completed, for global addresses 305 # configured by router advert message. 306 # 307 sleep $dadcount 308 sleep 1 309 fi 310 fi 311 312 # XXX this must die 313 if [ -s /etc/netstart.local ]; then 314 sh /etc/netstart.local start 315 fi 316} 317 318network_stop() 319{ 320 echo "Stopping network." 321 322 # XXX this must die 323 if [ -s /etc/netstart.local ]; then 324 sh /etc/netstart.local stop 325 fi 326 327 echo "Deleting aliases." 328 if [ -f /etc/ifaliases ]; then 329 while read addr int net; do 330 ifconfig $int inet delete $addr 331 done < /etc/ifaliases 332 fi 333 334 for int in `ifconfig -lu`; do 335 eval args=\$ifaliases_$int 336 if [ -n "$args" ]; then 337 set -- $args 338 while [ $# -ge 2 ]; do 339 addr=$1 ; net=$2 ; shift 2 340 ifconfig $int inet delete $addr 341 done 342 fi 343 done 344 345 # down interfaces 346 # 347 echo -n 'Downing network interfaces:' 348 if [ "$net_interfaces" != NO ]; then 349 if checkyesno auto_ifconfig; then 350 tmp=`ifconfig -l` 351 else 352 tmp="$net_interfaces" 353 fi 354 for int in $tmp; do 355 eval args=\$ifconfig_$int 356 if [ -n "$args" ] || [ -f /etc/ifconfig.$int ]; then 357 echo -n " $int" 358 ifconfig $int down 359 fi 360 done 361 echo "." 362 fi 363 364 # flush routes 365 # 366 route -n flush 367 368} 369 370load_rc_config $name 371run_rc_command "$1" 372