network revision 1.50
1#!/bin/sh 2# 3# $NetBSD: network,v 1.50 2005/11/24 17:28:45 rpaulo Exp $ 4# 5 6# PROVIDE: network 7# REQUIRE: ipfilter ipsec mountcritlocal root tty sysctl 8# BEFORE: NETWORKING 9 10$_rc_subr_loaded . /etc/rc.subr 11 12name="network" 13start_cmd="network_start" 14stop_cmd="network_stop" 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" ] && [ -f /etc/myname ]; then 26 hostname=$(cat /etc/myname) 27 fi 28 if [ -n "$hostname" ]; then 29 echo "Hostname: $hostname" 30 hostname $hostname 31 else 32 # Don't warn about it if we're going to run 33 # DHCP later, as we will probably get the 34 # hostname at that time. 35 # 36 if ! checkyesno dhclient && [ -z "$(hostname)" ]; 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" ] && [ -f /etc/defaultdomain ]; then 45 domainname=$(cat /etc/defaultdomain) 46 fi 47 if [ -n "$domainname" ]; then 48 echo "NIS domainname: $domainname" 49 domainname $domainname 50 fi 51 52 # Flush all routes just to make sure it is clean 53 if checkyesno flushroutes; then 54 route -qn flush 55 fi 56 57 # Set the address for the first loopback interface, so that the 58 # auto-route from a newly configured interface's address to lo0 59 # works correctly. 60 # 61 # NOTE: obscure networking problems will occur if lo0 isn't configured. 62 # 63 ifconfig lo0 inet 127.0.0.1 64 65 # According to RFC1122, 127.0.0.0/8 must not leave the node. 66 # 67 route -q add -inet 127.0.0.0 -netmask 0xff000000 127.0.0.1 -reject 68 69 # IPv6 routing setups, and host/router mode selection. 70 # 71 if ifconfig lo0 inet6 >/dev/null 2>&1; then 72 # We have IPv6 support in kernel. 73 74 # disallow link-local unicast dest without outgoing scope 75 # identifiers. 76 # 77 route -q add -inet6 fe80:: -prefixlen 10 ::1 -reject 78 79 # disallow the use of the RFC3849 documentation address 80 # 81 route -q add -inet6 2001:db8:: -prefixlen 32 ::1 -reject 82 83 # IPv6 site-local scoped address prefix (fec0::/10) 84 # has been deprecated by RFC3879. 85 # 86 if [ -n "$ip6sitelocal" ]; then 87 warn "\$ip6sitelocal is no longer valid" 88 fi 89 90 # disallow "internal" addresses to appear on the wire. 91 # 92 route -q add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject 93 94 # disallow packets to malicious IPv4 compatible prefix 95 # 96 route -q add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject 97 route -q add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject 98 route -q add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject 99 route -q add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject 100 101 # disallow packets to malicious 6to4 prefix 102 # 103 route -q add -inet6 2002:e000:: -prefixlen 20 ::1 -reject 104 route -q add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject 105 route -q add -inet6 2002:0000:: -prefixlen 24 ::1 -reject 106 route -q add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject 107 108 # Completely disallow packets to IPv4 compatible prefix. 109 # This may conflict with RFC1933 under following circumstances: 110 # (1) An IPv6-only KAME node tries to originate packets to IPv4 111 # comatible destination. The KAME node has no IPv4 112 # compatible support. Under RFC1933, it should transmit 113 # native IPv6 packets toward IPv4 compatible destination, 114 # hoping it would reach a router that forwards the packet 115 # toward auto-tunnel interface. 116 # (2) An IPv6-only node originates a packet to IPv4 compatible 117 # destination. A KAME node is acting as an IPv6 router, and 118 # asked to forward it. 119 # Due to rare use of IPv4 compatible address, and security 120 # issues with it, we disable it by default. 121 # 122 route -q add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject 123 124 sysctl -qw net.inet6.ip6.forwarding=0 125 sysctl -qw net.inet6.ip6.accept_rtadv=0 126 127 case $ip6mode in 128 router) 129 echo 'IPv6 mode: router' 130 sysctl -qw net.inet6.ip6.forwarding=1 131 132 # disallow unique-local unicast forwarding without 133 # explicit configuration. 134 if ! checkyesno ip6uniquelocal; then 135 route -q add -inet6 fc00:: -prefixlen 7 \ 136 ::1 -reject 137 fi 138 ;; 139 140 autohost) 141 echo 'IPv6 mode: autoconfigured host' 142 sysctl -qw net.inet6.ip6.accept_rtadv=1 143 ;; 144 145 host) 146 echo 'IPv6 mode: host' 147 ;; 148 149 *) warn "invalid \$ip6mode value "\"$ip6mode\" 150 ;; 151 152 esac 153 fi 154 155 # Configure all of the network interfaces listed in $net_interfaces; 156 # if $auto_ifconfig is YES, grab all interfaces from ifconfig. 157 # In the following, "xxN" stands in for interface names, like "le0". 158 # For any interfaces that has an $ifconfig_xxN variable associated, 159 # we do "ifconfig xxN $ifconfig_xxN". 160 # If there is no such variable, we take the contents of the file 161 # /etc/ifconfig.xxN, and run "ifconfig xxN" repeatedly, using each 162 # line of the file as the arguments for a separate "ifconfig" 163 # invocation. 164 # 165 # In order to configure an interface reasonably, you at the very least 166 # need to specify "[addr_family] [hostname]" (e.g "inet my.domain.org"), 167 # and probably a netmask (as in "netmask 0xffffffe0"). You will 168 # frequently need to specify a media type, as in "media UTP", for 169 # interface cards with multiple media connections that do not 170 # autoconfigure. See the ifconfig manual page for details. 171 # 172 # Note that /etc/ifconfig.xxN takes multiple lines. The following 173 # configuration is possible: 174 # inet 10.1.1.1 netmask 0xffffff00 175 # inet 10.1.1.2 netmask 0xffffff00 alias 176 # inet6 2001:db8::1 prefixlen 64 alias 177 # 178 # You can put shell script fragment into /etc/ifconfig.xxN by 179 # starting a line with "!". Refer to ifconfig.if(5) for details. 180 # 181 if [ "$net_interfaces" != NO ]; then 182 if checkyesno auto_ifconfig; then 183 tmp=$(ifconfig -l) 184 for cloner in $(ifconfig -C 2>/dev/null); do 185 for int in /etc/ifconfig.${cloner}[0-9]*; do 186 [ ! -f $int ] && break 187 tmp="$tmp ${int##*.}" 188 done 189 done 190 else 191 tmp="$net_interfaces" 192 fi 193 echo -n 'Configuring network interfaces:' 194 for int in $tmp; do 195 eval args=\$ifconfig_$int 196 if [ -n "$args" ] || [ -f /etc/ifconfig.$int ]; then 197 if ifconfig $int create 2>/dev/null && \ 198 checkyesno ipfilter; then 199 # resync ipf(4) 200 ipf -y >/dev/null 201 fi 202 fi 203 if [ -n "$args" ]; then 204 echo -n " $int" 205 ifconfig $int $args 206 elif [ -f /etc/ifconfig.$int ]; then 207 echo -n " $int" 208 while read args; do 209 [ -z "$args" ] && continue 210 case "$args" in 211 "#"*|create) 212 ;; 213 "!"*) 214 eval ${args#*!} 215 ;; 216 *) 217 eval ifconfig $int $args 218 ;; 219 esac 220 done < /etc/ifconfig.$int 221 else 222 if ! checkyesno auto_ifconfig; then 223 echo 224 warn \ 225 "/etc/ifconfig.$int missing and ifconfig_$int not set;" 226 warn "interface $int not configured." 227 fi 228 continue 229 fi 230 configured_interfaces="$configured_interfaces $int" 231 done 232 echo "." 233 fi 234 235 # Check $defaultroute, then /etc/mygate, for the name or address 236 # of my IPv4 gateway host. If using a name, that name must be in 237 # /etc/hosts. 238 # 239 if [ -z "$defaultroute" ] && [ -f /etc/mygate ]; then 240 defaultroute=$(cat /etc/mygate) 241 fi 242 if [ -n "$defaultroute" ]; then 243 route add default $defaultroute 244 fi 245 246 # Check $defaultroute6, then /etc/mygate6, for the name or address 247 # of my IPv6 gateway host. If using a name, that name must be in 248 # /etc/hosts. Note that the gateway host address must be a link-local 249 # address if it is not using an stf* interface. 250 # 251 if [ -z "$defaultroute6" ] && [ -f /etc/mygate6 ]; then 252 defaultroute6=$(cat /etc/mygate6) 253 fi 254 if [ -n "$defaultroute6" ]; then 255 if [ "$ip6mode" = "autohost" ]; then 256 echo 257 warn \ 258 "ip6mode is set to 'autohost' and a v6 default route is also set." 259 fi 260 route add -inet6 default $defaultroute6 261 fi 262 263 echo -n "Adding interface aliases:" 264 265 # Check if each configured interface xxN has an $ifaliases_xxN variable 266 # associated, then configure additional IP addresses for that interface. 267 # The variable contains a list of "address netmask" pairs, with 268 # "netmask" set to "-" if the interface default netmask is to be used. 269 # 270 # Note that $ifaliases_xxN works only with certain configurations and 271 # considered not recommended. Use /etc/ifconfig.xxN if possible. 272 # 273 # 274 for int in lo0 $configured_interfaces; do 275 eval args=\$ifaliases_$int 276 if [ -n "$args" ]; then 277 set -- $args 278 while [ $# -ge 2 ]; do 279 addr=$1 ; net=$2 ; shift 2 280 if [ "$net" = "-" ]; then 281 # for compatibility only, obsolete 282 ifconfig $int inet alias $addr 283 else 284 ifconfig $int inet alias $addr \ 285 netmask $net 286 fi 287 echo -n " $int:$addr" 288 done 289 fi 290 done 291 292 # /etc/ifaliases, if it exists, contains the names of additional IP 293 # addresses for each interface. It is formatted as a series of lines 294 # that contain 295 # address interface netmask 296 # 297 # Note that /etc/ifaliases works only with certain cases only and its 298 # use is not recommended. Use /etc/ifconfig.xxN instead. 299 # 300 # 301 if [ -f /etc/ifaliases ]; then 302 while read addr int net; do 303 if [ -z "$net" ]; then 304 # for compatibility only, obsolete 305 ifconfig $int inet alias $addr 306 else 307 ifconfig $int inet alias $addr netmask $net 308 fi 309 done < /etc/ifaliases 310 fi 311 312 echo 313 314 # IPv6 interface autoconfiguration. 315 # 316 if ifconfig lo0 inet6 >/dev/null 2>&1; then 317 # wait till DAD is completed. always invoke it in case 318 # if are configured manually by ifconfig 319 # 320 dadcount=$(sysctl -n net.inet6.ip6.dad_count 2>/dev/null) 321 sleep $dadcount 322 sleep 1 323 324 if checkyesno rtsol; then 325 if [ "$ip6mode" = "autohost" ]; then 326 echo 'Sending router solicitation...' 327 rtsol $rtsol_flags 328 else 329 echo 330 warn \ 331 "ip6mode must be set to 'autohost' to use rtsol." 332 fi 333 334 # wait till DAD is completed, for global addresses 335 # configured by router advert message. 336 # 337 sleep $dadcount 338 sleep 1 339 fi 340 fi 341 342 # XXX this must die 343 if [ -s /etc/netstart.local ]; then 344 sh /etc/netstart.local start 345 fi 346} 347 348network_stop() 349{ 350 echo "Stopping network." 351 352 # XXX this must die 353 if [ -s /etc/netstart.local ]; then 354 sh /etc/netstart.local stop 355 fi 356 357 echo "Deleting aliases." 358 if [ -f /etc/ifaliases ]; then 359 while read addr int net; do 360 ifconfig $int inet delete $addr 361 done < /etc/ifaliases 362 fi 363 364 for int in $(ifconfig -lu); do 365 eval args=\$ifaliases_$int 366 if [ -n "$args" ]; then 367 set -- $args 368 while [ $# -ge 2 ]; do 369 addr=$1 ; net=$2 ; shift 2 370 ifconfig $int inet delete $addr 371 done 372 fi 373 done 374 375 # down interfaces 376 # 377 echo -n 'Downing network interfaces:' 378 if [ "$net_interfaces" != NO ]; then 379 if checkyesno auto_ifconfig; then 380 tmp=$(ifconfig -l) 381 else 382 tmp="$net_interfaces" 383 fi 384 for int in $tmp; do 385 eval args=\$ifconfig_$int 386 if [ -n "$args" ] || [ -f /etc/ifconfig.$int ]; then 387 echo -n " $int" 388 ifconfig $int down 389 if ifconfig $int destroy 2>/dev/null && \ 390 checkyesno ipfilter; then 391 # resync ipf(4) 392 ipf -y >/dev/null 393 fi 394 fi 395 done 396 echo "." 397 fi 398 399 # flush routes 400 # 401 route -qn flush 402 403} 404 405load_rc_config $name 406load_rc_config_var dhclient dhclient 407load_rc_config_var ipfilter ipfilter 408run_rc_command "$1" 409