network revision 1.21
1#!/bin/sh 2# 3# $NetBSD: network,v 1.21 2000/11/17 04:19:06 lukem 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 \ 96 in `/bin/ls /etc/ifconfig.${cloner}[0-9]* 2>/dev/null`; do 97 tmp="$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 " $int" 111 while read args; do 112 if [ -n "`eval echo '$args'`" ] ; then 113 ifconfig $int $args 114 fi 115 done < /etc/ifconfig.$int 116 else 117 if ! checkyesno auto_ifconfig; then 118 echo 119 warn \ 120 "/etc/ifconfig.$int missing and ifconfig_$int not set;" 121 warn "interface $int not configured." 122 fi 123 continue 124 fi 125 configured_interfaces="$configured_interfaces $int" 126 done 127 echo "." 128 fi 129 130 # Check $defaultroute, then /etc/mygate, for the name of my gateway 131 # host. That name must be in /etc/hosts. 132 # 133 if [ -z "$defaultroute" ] && [ -f /etc/mygate ]; then 134 defaultroute=`cat /etc/mygate` 135 fi 136 if [ -n "$defaultroute" ]; then 137 route add default $defaultroute 138 fi 139 140 # Check if each configured interface xxN has an $ifaliases_xxN variable 141 # associated, then configure additional IP addresses for that interface. 142 # The variable contains a list of "address netmask" pairs, with 143 # "netmask" set to "-" if the interface default netmask is to be used. 144 # 145 # Note that $ifaliases_xxN works only with certain configurations and 146 # considered not recommended. Use /etc/ifconfig.xxN if possible. 147 # 148 # 149 if [ -n "$configured_interfaces" ]; then 150 echo "Adding interface aliases:" 151 done_aliases_message=yes 152 fi 153 for int in $configured_interfaces; do 154 eval args=\$ifaliases_$int 155 if [ -n "$args" ]; then 156 set -- $args 157 while [ $# -ge 2 ]; do 158 addr=$1 ; net=$2 ; shift 2 159 if [ "$net" = "-" ]; then 160 # for compatibility only, obsolete 161 ifconfig $int inet alias $addr 162 else 163 ifconfig $int inet alias $addr \ 164 netmask $net 165 fi 166 # Use loopback, not the wire 167 route add $addr 127.0.0.1 168 done 169 fi 170 done 171 172 # /etc/ifaliases, if it exists, contains the names of additional IP 173 # addresses for each interface. It is formatted as a series of lines 174 # that contain 175 # address interface netmask 176 # 177 # Note that /etc/ifaliases works only with certain cases only and its 178 # use is not recommended. Use /etc/ifconfig.xxN instead. 179 # 180 # 181 if [ -f /etc/ifaliases ]; then 182 if [ "$done_aliases_message" != yes ]; then 183 echo "Adding interface aliases:" 184 fi 185 while read addr int net; do 186 if [ -z "$net" ]; then 187 # for compatibility only, obsolete 188 ifconfig $int inet alias $addr 189 else 190 ifconfig $int inet alias $addr netmask $net 191 fi 192 # use loopback, not the wire 193 route add $addr 127.0.0.1 194 done < /etc/ifaliases 195 fi 196 197 # IPv6 198 # Note that manual configuration can be done in the above, using 199 # ifconfig. 200 # 201 if ifconfig lo0 inet6 >/dev/null 2>&1; then 202 # We have IPv6 support in kernel. 203 204 # disallow link-local unicast dest without outgoing scope 205 # identifiers. 206 # 207 route add -inet6 fe80:: -prefixlen 10 ::1 -reject 208 209 # disallow site-local unicast dest without outgoing scope 210 # identifiers. 211 # If you configure site-locals without scope id (it is 212 # permissible config for routers that are not on scope 213 # boundary), you may want to comment the following one out. 214 # 215 route add -inet6 fec0:: -prefixlen 10 ::1 -reject 216 217 # disallow "internal" addresses to appear on the wire. 218 # 219 route add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject 220 221 # disallow packets to malicious IPv4 compatible prefix 222 # 223 route add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject 224 route add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject 225 route add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject 226 route add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject 227 228 # disallow packets to malicious 6to4 prefix 229 # 230 route add -inet6 2002:e000:: -prefixlen 20 ::1 -reject 231 route add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject 232 route add -inet6 2002:0000:: -prefixlen 24 ::1 -reject 233 route add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject 234 235 # Completely disallow packets to IPv4 compatible prefix. 236 # This may conflict with RFC1933 under following circumstances: 237 # (1) An IPv6-only KAME node tries to originate packets to IPv4 238 # comatible destination. The KAME node has no IPv4 239 # compatible support. Under RFC1933, it should transmit 240 # native IPv6 packets toward IPv4 compatible destination, 241 # hoping it would reach a router that forwards the packet 242 # toward auto-tunnel interface. 243 # (2) An IPv6-only node originates a packet to IPv4 compatible 244 # destination. A KAME node is acting as an IPv6 router, and 245 # asked to forward it. 246 # Due to rare use of IPv4 compatible address, and security 247 # issues with it, we disable it by default. 248 # 249 route add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject 250 251 sysctl -w net.inet6.ip6.forwarding=0 >/dev/null 252 sysctl -w net.inet6.ip6.accept_rtadv=0 >/dev/null 253 254 # backward compatibility 255 # 256 if [ -z "$ip6mode" ] && [ -n "$ip6forwarding" ]; then 257 warn 'Please migrate to newer rc.conf' \ 258 '(use ip6mode, not ip6forwarding)' 259 if checkyesno ip6forwarding; then 260 ip6mode=router 261 elif checkyesno rtsol; then 262 ip6mode=autohost 263 else 264 ip6mode=host 265 fi 266 fi 267 268 case $ip6mode in 269 router) 270 echo 'IPv6 mode: router' 271 sysctl -w net.inet6.ip6.forwarding=1 >/dev/null 272 ;; 273 274 autohost) 275 echo 'IPv6 mode: autoconfigured host' 276 sysctl -w net.inet6.ip6.accept_rtadv=1 >/dev/null 277 ;; 278 279 host) 280 echo 'IPv6 mode: host' 281 ;; 282 283 *) echo 'WARNING: invalid value in ip6mode' 284 ;; 285 286 esac 287 288 # wait till DAD is completed. always invoke it in case 289 # if are configured manually by ifconfig 290 # 291 dadcount=`sysctl -n net.inet6.ip6.dad_count 2>/dev/null` 292 sleep $dadcount 293 sleep 1 294 295 if checkyesno rtsol; then 296 if [ "$ip6mode" = "autohost" ]; then 297 echo 'Sending router solicitation...' 298 rtsol $rtsol_flags 299 else 300 echo 301 warn \ 302 "ip6mode must be set to 'autohost' to use rtsol." 303 fi 304 305 # wait till DAD is completed, for global addresses 306 # configured by router advert message. 307 # 308 sleep $dadcount 309 sleep 1 310 fi 311 fi 312 313 # XXX this must die 314 if [ -s /etc/netstart.local ]; then 315 sh /etc/netstart.local start 316 fi 317} 318 319network_stop() 320{ 321 echo "Stopping network." 322 323 # XXX this must die 324 if [ -s /etc/netstart.local ]; then 325 sh /etc/netstart.local stop 326 fi 327 328 echo "Deleting aliases." 329 if [ -f /etc/ifaliases ]; then 330 while read addr int net; do 331 ifconfig $int inet delete $addr 332 done < /etc/ifaliases 333 fi 334 335 for int in `ifconfig -lu`; do 336 eval args=\$ifaliases_$int 337 if [ -n "$args" ]; then 338 set -- $args 339 while [ $# -ge 2 ]; do 340 addr=$1 ; net=$2 ; shift 2 341 ifconfig $int inet delete $addr 342 done 343 fi 344 done 345 346 # down interfaces 347 # 348 echo -n 'Downing network interfaces:' 349 if [ "$net_interfaces" != NO ]; then 350 if checkyesno auto_ifconfig; then 351 tmp="`ifconfig -l`" 352 else 353 tmp="$net_interfaces" 354 fi 355 for int in $tmp; do 356 eval args=\$ifconfig_$int 357 if [ -n "$args" ] || [ -f /etc/ifconfig.$int ]; then 358 echo -n " $int" 359 ifconfig $int down 360 fi 361 done 362 echo "." 363 fi 364 365 # flush routes 366 # 367 route -n flush 368 369} 370 371load_rc_config $name 372run_rc_command "$1" 373