network revision 1.9
1#!/bin/sh 2# 3# $NetBSD: network,v 1.9 2000/04/29 06:01:08 veego Exp $ 4# 5 6# PROVIDE: network 7# REQUIRE: root mountcritlocal tty sysctl 8 9. /etc/rc.subr 10. /etc/rc.conf 11 12name="network" 13start_cmd="network_start" 14stop_cmd=":" 15 16network_start() 17{ 18 # set hostname, turn on network 19 # 20 echo "Starting network." 21 22 # If $hostname is set, use it for my Internet name, 23 # otherwise use /etc/myname 24 # 25 if [ -z "$hostname" -a -f /etc/myname ]; then 26 hostname=`cat /etc/myname` 27 fi 28 if [ -n "$hostname" ]; then 29 echo "Hostname: $hostname" 30 hostname $hostname 31 else 32 # Don't warn about it if we're going to run 33 # DHCP later, as we will probably get the 34 # hostname at that time. 35 # 36 if ! checkyesno dhclient; then 37 warn "\$hostname not set." 38 fi 39 fi 40 41 # Check $domainname first, then /etc/defaultdomain, 42 # for NIS/YP domain name 43 # 44 if [ -z "$domainname" -a -f /etc/defaultdomain ]; then 45 domainname=`cat /etc/defaultdomain` 46 fi 47 if [ -n "$domainname" ]; then 48 echo "NIS domainname: $domainname" 49 domainname $domainname 50 fi 51 52 # Flush all routes just to make sure it is clean 53 if checkyesno flushroutes; then 54 route -n flush 55 fi 56 57 # Set the address for the first loopback interface, so that the 58 # auto-route from a newly configured interface's address to lo0 59 # works correctly. 60 # 61 # NOTE: obscure networking problems may occur if lo0 isn't configured... 62 # 63 ifconfig lo0 inet 127.0.0.1 64 65 # Configure all of the network interfaces listed in $net_interfaces; 66 # if $auto_ifconfig is YES, grab all interfaces from ifconfig. 67 # In the following, "xxN" stands in for interface names, like "le0". 68 # For any interfaces that has an $ifconfig_xxN variable associated, 69 # we do "ifconfig xxN $ifconfig_xxN". 70 # If there is no such variable, we take the contents of the file 71 # /etc/ifconfig.xxN, and run "ifconfig xxN" repeatedly, using each 72 # line of the file as the arguments for a seperate "ifconfig" 73 # invocation. 74 # 75 # In order to configure an interface reasonably, you at the very least 76 # need to specify "[addr_family] [hostname]" (e.g "inet my.domain.org"), 77 # and probably a netmask (as in "netmask 0xffffffe0"). You will 78 # frequently need to specify a media type, as in "media UTP", for 79 # interface cards with multiple media connections that do not 80 # autoconfigure. See the ifconfig manual page for details. 81 # 82 # Note that /etc/ifconfig.xxN takes multiple lines. The following 83 # configuration is possible: 84 # inet 10.1.1.1 netmask 0xffffff00 85 # inet 10.1.1.2 netmask 0xffffff00 alias 86 # inet6 fec0::1 prefixlen 64 alias 87 # 88 if [ "$net_interfaces" != NO ]; then 89 if checkyesno auto_ifconfig; then 90 tmp="`ifconfig -l`" 91 else 92 tmp="$net_interfaces" 93 fi 94 echo -n 'Configuring network interfaces:' 95 for int in $tmp; do 96 eval `echo 'args=$ifconfig_'$int` 97 if [ -n "$args" ]; then 98 echo -n " $int" 99 ifconfig $int $args 100 elif [ -f /etc/ifconfig.$int ]; then 101 echo -n " $int" 102 (while read args; do 103 if [ -n "`eval echo '$args'`" ] ; then 104 ifconfig $int $args 105 fi 106 done) < /etc/ifconfig.$int 107 else 108 if ! checkyesno auto_ifconfig; then 109 echo 110 warn \ 111 "/etc/ifconfig.$int missing and ifconfig_$int not set;" 112 warn "interface $int not configured." 113 fi 114 continue 115 fi 116 configured_interfaces="$configured_interfaces $int" 117 done 118 echo "." 119 fi 120 121 # Check $defaultroute, then /etc/mygate, for the name of my gateway 122 # host. That name must be in /etc/hosts. 123 # 124 if [ -z "$defaultroute" -a -f /etc/mygate ]; then 125 defaultroute=`cat /etc/mygate` 126 fi 127 if [ -n "$defaultroute" ]; then 128 route add default $defaultroute 129 fi 130 131 # Check if each configured interface xxN has an $ifaliases_xxN variable 132 # associated, then configure additional IP addresses for that interface. 133 # The variable contains a list of "address netmask" pairs, with 134 # "netmask" set to "-" if the interface default netmask is to be used. 135 # 136 # Note that $ifaliases_xxN works only with certain configurations and 137 # considered not recommended. Use /etc/ifconfig.xxN if possible. 138 # 139 # 140 if [ -n "$configured_interfaces" ]; then 141 echo "Adding interface aliases:" 142 done_aliases_message=yes 143 fi 144 for int in $configured_interfaces; do 145 eval `echo 'args=$ifaliases_'$int` 146 if [ -n "$args" ]; then 147 set -- $args 148 while [ $# -ge 2 ]; do 149 addr=$1 ; net=$2 ; shift 2 150 if [ "$net" = "-" ]; then 151 ifconfig $int inet alias $addr 152 else 153 ifconfig $int inet alias $addr \ 154 netmask $net 155 fi 156 # Use loopback, not the wire 157 route add $addr 127.0.0.1 158 done 159 fi 160 done 161 162 # /etc/ifaliases, if it exists, contains the names of additional IP 163 # addresses for each interface. It is formatted as a series of lines 164 # that contain 165 # address interface netmask 166 # 167 # Note that /etc/ifaliases works only with certain cases only and its 168 # use is not recommended. Use /etc/ifconfig.xxN instead. 169 # 170 # 171 if [ -f /etc/ifaliases ]; then 172 ( 173 if [ "$done_aliases_message" != yes ]; then 174 echo "Adding interface aliases:" 175 fi 176 while read addr int net; do 177 if [ -z "$net" ]; then 178 ifconfig $int inet alias $addr 179 else 180 ifconfig $int inet alias $addr netmask $net 181 fi 182 # use loopback, not the wire 183 route add $addr 127.0.0.1 184 done 185 ) < /etc/ifaliases 186 fi 187 188 # IPv6 189 # Note that manual configuration can be done in the above, using 190 # ifconfig. 191 # 192 if ifconfig lo0 inet6 >/dev/null 2>&1; then 193 # We have IPv6 support in kernel. 194 195 # disallow link-local unicast dest without outgoing scope 196 # identifiers. 197 # 198 route add -inet6 fe80:: -prefixlen 10 ::1 -reject 199 200 # disallow site-local unicast dest without outgoing scope 201 # identifiers. 202 # If you configure site-locals without scope id (it is 203 # permissible config for routers that are not on scope 204 # boundary), you may want to comment the following one out. 205 # 206 route add -inet6 fec0:: -prefixlen 10 ::1 -reject 207 208 # disallow "internal" addresses to appear on the wire. 209 # 210 route add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject 211 212 # disallow packets to malicious IPv4 compatible prefix 213 # 214 route add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject 215 route add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject 216 route add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject 217 route add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject 218 219 # disallow packets to malicious 6to4 prefix 220 # 221 route add -inet6 2002:e000:: -prefixlen 20 ::1 -reject 222 route add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject 223 route add -inet6 2002:0000:: -prefixlen 24 ::1 -reject 224 route add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject 225 226 # Completely disallow packets to IPv4 compatible prefix. 227 # This may conflict with RFC1933 under following circumstances: 228 # (1) An IPv6-only KAME node tries to originate packets to IPv4 229 # comatible destination. The KAME node has no IPv4 230 # compatible support. Under RFC1933, it should transmit 231 # native IPv6 packets toward IPv4 compatible destination, 232 # hoping it would reach a router that forwards the packet 233 # toward auto-tunnel interface. 234 # (2) An IPv6-only node originates a packet to IPv4 compatible 235 # destination. A KAME node is acting as an IPv6 router, and 236 # asked to forward it. 237 # Due to rare use of IPv4 compatible address, and security 238 # issues with it, we disable it by default. 239 # 240 route add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject 241 242 sysctl -w net.inet6.ip6.forwarding=0 >/dev/null 243 sysctl -w net.inet6.ip6.accept_rtadv=0 >/dev/null 244 245 # backward compatibility 246 # 247 if [ -z "$ip6mode" -a -n "$ip6forwarding" ]; then 248 warn 'Please migrate to newer rc.conf' \ 249 '(use ip6mode, not ip6forwarding)' 250 if checkyesno ip6forwarding; then 251 ip6mode=router 252 else 253 if checkyesno rtsol; then 254 ip6mode=autohost 255 else 256 ip6mode=host 257 fi 258 fi 259 fi 260 261 case $ip6mode in 262 router) 263 echo 'IPv6 mode: router' 264 sysctl -w net.inet6.ip6.forwarding=1 >/dev/null 265 ;; 266 267 autohost) 268 echo 'IPv6 mode: autoconfigured host' 269 sysctl -w net.inet6.ip6.accept_rtadv=1 >/dev/null 270 if [ -n "$ip6defaultif" ]; then 271 ndp -I $ip6defaultif 272 fi 273 ;; 274 275 host) 276 echo 'IPv6 mode: host' 277 if [ -n "$ip6defaultif" ]; then 278 ndp -I $ip6defaultif 279 fi 280 ;; 281 282 *) echo 'WARNING: invalid value in ip6mode' 283 ;; 284 285 esac 286 287 if checkyesno rtsol; then 288 if [ "$ip6mode" = "autohost" ]; then 289 echo 'Sending router solicitation...' 290 rtsol $rtsol_flags 291 else 292 echo 293 warn \ 294 "ip6mode must be set to 'autohost' to use rtsol." 295 fi 296 fi 297 298 # wait till DAD is completed. always invoke it in case if are 299 # configured manually by ifconfig 300 # 301 dadcount=`sysctl -n net.inet6.ip6.dad_count 2>/dev/null` 302 sleep $dadcount 303 sleep 1 304 fi 305 306 # XXX this must die 307 if [ -s /etc/netstart.local ]; then 308 sh /etc/netstart.local start 309 fi 310} 311 312network_stop() 313{ 314 echo "Stopping network." 315 316 # XXX this must die 317 if [ -s /etc/netstart.local ]; then 318 sh /etc/netstart.local stop 319 fi 320 321 echo "Deleting aliases." 322 if [ -f /etc/ifaliases ]; then 323 ( 324 while read addr int net; do 325 ifconfig $int inet delete $addr 326 done 327 ) < /etc/ifaliases 328 fi 329 330 for int in $configured_interfaces; do 331 eval `echo 'args=$ifaliases_'$int` 332 if [ -n "$args" ]; then 333 set -- $args 334 while [ $# -ge 2 ]; do 335 addr=$1 ; net=$2 ; shift 2 336 ifconfig $int inet delete $addr 337 done 338 fi 339 done 340 341 # down interfaces 342 # 343 echo -n 'Downing network interfaces:' 344 if [ "$net_interfaces" != NO ]; then 345 if checkyesno auto_ifconfig; then 346 tmp="`ifconfig -l`" 347 else 348 tmp="$net_interfaces" 349 fi 350 for int in $tmp; do 351 eval `echo 'args=$ifconfig_'$int` 352 if [ -n "$args" ] || [ -f /etc/ifconfig.$int ]; then 353 echo -n " $int" 354 ifconfig $int down 355 fi 356 done 357 echo "." 358 fi 359 360 # flush routes 361 # 362 route -n flush 363 364} 365 366run_rc_command "$1" 367