netstart revision 1.113
1#!/bin/sh - 2# 3# $OpenBSD: netstart,v 1.113 2005/12/28 04:55:35 david Exp $ 4 5# Strip comments (and leading/trailing whitespace if IFS is set) 6# from a file and spew to stdout 7stripcom() { 8 local _l 9 [[ -f $1 ]] || return 10 while read _l; do 11 [[ -n ${_l%%#*} ]] && echo $_l 12 done<$1 13} 14 15# Returns true if $1 contains only alphanumerics 16isalphanumeric() { 17 local _n 18 _n=$1 19 while [ ${#_n} != 0 ]; do 20 case $_n in 21 [A-Za-z0-9]*) ;; 22 *) return 1;; 23 esac 24 _n=${_n#?} 25 done 26 return 0 27} 28 29# Start the $1 interface 30ifstart() { 31 if=$1 32 # Interface names must be alphanumeric only. We check to avoid 33 # configuring backup or temp files, and to catch the "*" case. 34 if ! isalphanumeric "$if"; then 35 return 36 fi 37 38 ifconfig $if > /dev/null 2>&1 39 if [ "$?" != "0" ]; then 40 # Try to create interface if it does not exist 41 ifconfig $if create > /dev/null 2>&1 42 if [ "$?" != "0" ]; then 43 return 44 fi 45 fi 46 47 # Now parse the hostname.* file 48 while :; do 49 if [ "$cmd2" ]; then 50 # We are carrying over from the 'read dt dtaddr' 51 # last time. 52 set -- $cmd2 53 af="$1" name="$2" mask="$3" bcaddr="$4" ext1="$5" cmd2= 54 # Make sure and get any remaining args in ext2, 55 # like the read below 56 i=1 57 while [ i -lt 6 -a -n "$1" ]; do shift; let i=i+1; done 58 ext2="$@" 59 else 60 # Read the next line or exit the while loop. 61 read af name mask bcaddr ext1 ext2 || break 62 fi 63 # $af can be "dhcp", "up", "rtsol", an address family, 64 # commands, or a comment. 65 case "$af" in 66 "#"*|"") # skip comments and empty lines 67 continue 68 ;; 69 "!"*) # parse commands 70 cmd="${af#*!} ${name} ${mask} ${bcaddr} ${ext1} ${ext2}" 71 ;; 72 "bridge") 73 cmd="echo /etc/hostname.$if: bridges now supported via bridgename.* files" 74 ;; 75 "dhcp") 76 [ "$name" = "NONE" ] && name= 77 [ "$mask" = "NONE" ] && mask= 78 [ "$bcaddr" = "NONE" ] && bcaddr= 79 cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 down" 80 cmd="$cmd;dhclient $if" 81 dhcpif="$dhcpif $if" 82 ;; 83 "rtsol") 84 rtsolif="$rtsolif $if" 85 cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 up" 86 ;; 87 "up") 88 # The only one of these guaranteed to be set is $if. 89 # The remaining ones exist so that media controls work. 90 cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 up" 91 ;; 92 *) 93 read dt dtaddr 94 if [ "$name" = "alias" ]; then 95 # perform a 'shift' of sorts 96 alias=$name 97 name=$mask 98 mask=$bcaddr 99 bcaddr=$ext1 100 ext1=$ext2 101 ext2= 102 else 103 alias= 104 fi 105 cmd="ifconfig $if $af $alias $name " 106 case "$dt" in 107 dest) 108 cmd="$cmd $dtaddr" 109 ;; 110 [a-z!]*) 111 cmd2="$dt $dtaddr" 112 ;; 113 esac 114 if [ ! -n "$name" ]; then 115 echo "/etc/hostname.$if: invalid network configuration file" 116 return 117 fi 118 case $af in 119 inet) 120 [ "$mask" ] && cmd="$cmd netmask $mask" 121 if [ "$bcaddr" -a "X$bcaddr" != "XNONE" ]; then 122 cmd="$cmd broadcast $bcaddr" 123 fi 124 [ "$alias" ] && rtcmd=";route -qn add -host $name 127.0.0.1" 125 ;; 126 inet6) [ "$mask" ] && cmd="$cmd prefixlen $mask" 127 cmd="$cmd $bcaddr" 128 ;; 129 *) 130 cmd="$cmd $mask $bcaddr" 131 ;; 132 esac 133 cmd="$cmd $ext1 $ext2$rtcmd" rtcmd= 134 ;; 135 esac 136 eval "$cmd" 137 done < /etc/hostname.$if 138} 139 140# Start multiple: 141# start "$1" interfaces in order or all interfaces if empty 142# don't start "$2" interfaces 143ifmstart() { 144 for sif in ${1:-ALL}; do 145 for hn in /etc/hostname.*; do 146 # Strip off /etc/hostname. prefix 147 if=${hn#/etc/hostname.} 148 test "$if" = "*" && continue 149 150 # Skip unwanted ifs 151 s="" 152 for xf in $2; do 153 test "$xf" = "${if%%[0-9]*}" && s="1" && break 154 done 155 test "$s" = "1" && continue 156 157 # Start wanted ifs 158 test "$sif" = "ALL" -o \ 159 "$sif" = "${if%%[0-9]*}" \ 160 && ifstart $if 161 done 162 done 163} 164 165# Start the $1 bridge 166bridgestart() { 167 # Interface names must be alphanumeric only. We check to avoid 168 # configuring backup or temp files, and to catch the "*" case. 169 if ! isalphanumeric "$1"; then 170 return 171 fi 172 brconfig $1 > /dev/null 2>&1 173 if [ "$?" != "0" ]; then 174 # Try to create interface if it does not exist 175 ifconfig $1 create > /dev/null 2>&1 176 if [ "$?" != "0" ]; then 177 return 178 fi 179 fi 180 181 # Now parse the bridgename.* file 182 # All lines are run as brconfig(8) commands. 183 while read line ; do 184 line=${line%%#*} # strip comments 185 test -z "$line" && continue 186 case "$line" in 187 "!"*) 188 cmd="${line#*!}" 189 ;; 190 *) 191 cmd="brconfig $1 $line" 192 ;; 193 esac 194 eval "$cmd" 195 done < /etc/bridgename.$1 196} 197 198# Re-read /etc/rc.conf 199. /etc/rc.conf 200 201# If we were invoked with a list of interface names, just reconfigure these 202# interfaces (or bridges) and return. 203if [ $1x = autobootx ]; then 204 shift 205fi 206if [ $# -gt 0 ]; then 207 while [ $# -gt 0 ]; do 208 if [ -f /etc/bridgename.$1 ]; then 209 bridgestart $1 210 else 211 ifstart $1 212 fi 213 shift 214 done 215 return 216fi 217 218# Otherwise, process with the complete network initialization. 219 220# /etc/myname contains my symbolic name 221if [ -f /etc/myname ]; then 222 hostname=`stripcom /etc/myname` 223 hostname $hostname 224else 225 hostname=`hostname` 226fi 227 228if [ -f /etc/defaultdomain ]; then 229 domainname `stripcom /etc/defaultdomain` 230fi 231 232# Set the address for the loopback interface. Bringing the 233# interface up, automatically invokes the IPv6 address ::1) 234ifconfig lo0 inet 127.0.0.1 235 236if ifconfig lo0 inet6 >/dev/null 2>&1; then 237 # IPv6 configurations. 238 ip6kernel=YES 239 240 # Disallow link-local unicast dest without outgoing scope identifiers. 241 route -qn add -inet6 fe80:: -prefixlen 10 ::1 -reject > /dev/null 242 243 # Disallow site-local unicast dest without outgoing scope identifiers. 244 # If you configure site-locals without scope id (it is permissible 245 # config for routers that are not on scope boundary), you may want 246 # to comment the line out. 247 route -qn add -inet6 fec0:: -prefixlen 10 ::1 -reject > /dev/null 248 249 # Disallow "internal" addresses to appear on the wire. 250 route -qn add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null 251 252 # Disallow packets to malicious IPv4 compatible prefix. 253 route -qn add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject > /dev/null 254 route -qn add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject > /dev/null 255 route -qn add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject > /dev/null 256 route -qn add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject > /dev/null 257 258 # Disallow packets to malicious 6to4 prefix. 259 route -qn add -inet6 2002:e000:: -prefixlen 20 ::1 -reject > /dev/null 260 route -qn add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject > /dev/null 261 route -qn add -inet6 2002:0000:: -prefixlen 24 ::1 -reject > /dev/null 262 route -qn add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject > /dev/null 263 264 # Completely disallow packets to IPv4 compatible prefix. 265 # This may conflict with RFC1933 under following circumstances: 266 # (1) An IPv6-only KAME node tries to originate packets to IPv4 267 # compatible destination. The KAME node has no IPv4 compatible 268 # support. Under RFC1933, it should transmit native IPv6 269 # packets toward IPv4 compatible destination, hoping it would 270 # reach a router that forwards the packet toward auto-tunnel 271 # interface. 272 # (2) An IPv6-only node originates a packet to an IPv4 compatible 273 # destination. A KAME node is acting as an IPv6 router, and 274 # asked to forward it. 275 # Due to rare use of IPv4 compatible addresses, and security issues 276 # with it, we disable it by default. 277 route -qn add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null 278 279 rtsolif="" 280else 281 ip6kernel=NO 282fi 283 284 285# Configure all the non-loopback interfaces which we know about, but 286# do not start interfaces which must be delayed. 287# Refer to hostname.if(5) and bridgename.if(5) 288ifmstart "" "trunk vlan carp gif gre pfsync pppoe" 289 290if [ "$ip6kernel" = "YES" -a "x$rtsolif" != "x" ]; then 291 fw=`sysctl -n net.inet6.ip6.forwarding` 292 ra=`sysctl -n net.inet6.ip6.accept_rtadv` 293 if [ "x$fw" = "x0" -a "x$ra" = "x1" ]; then 294 echo "IPv6 autoconf:$rtsolif" 295 rtsol $rtsolif 296 else 297 echo "WARNING: inconsistent config - check /etc/sysctl.conf for IPv6 autoconf" 298 fi 299fi 300if [ "$ip6kernel" = "YES" ]; then 301 # this is to make sure DAD is completed before going further. 302 sleep `sysctl -n net.inet6.ip6.dad_count` 303fi 304 305# The trunk interfaces need to come up first in this list. 306# The vlan interfaces need to come up after trunk. 307# The pfsync interfaces need to come up before carp. 308# Configure all the carp interfaces which we know about. 309# They must come up after pfsync but before default route. 310ifmstart "trunk vlan pfsync carp" 311 312# /etc/mygate, if it exists, contains the name of my gateway host 313# that name must be in /etc/hosts. 314[[ -z $dhcpif ]] && stripcom /etc/mygate | while read gw; do 315 [[ $gw == @(*:*) ]] && continue 316 route -qn delete default > /dev/null 2>&1 317 route -qn add -host default $gw && break 318done 319[[ -z $rtsolif ]] && stripcom /etc/mygate | while read gw; do 320 [[ $gw == !(*:*) ]] && continue 321 route -qn delete -inet6 default > /dev/null 2>&1 322 route -qn add -host -inet6 default $gw && break 323done 324 325# Multicast routing. 326# 327# The routing to the 224.0.0.0/4 net is setup according to these rules: 328# multicast_host multicast_router route comment 329# NO NO -reject no multicast 330# NO YES none installed daemon will run 331# YES/interface NO -interface YES=def. iface 332# Any other combination -reject config error 333route -qn delete 224.0.0.0/4 > /dev/null 2>&1 334case "$multicast_host:$multicast_router" in 335NO:NO) 336 route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null 337 ;; 338NO:YES) 339 ;; 340*:NO) 341 maddr=`if [ "$multicast_host" = "YES" ]; then 342 ed -s '!route -qn show -inet' <<EOF 343/^default/p 344EOF 345 else 346 ed -s "!ifconfig $multicast_host" <<EOF 347/^ inet /p 348EOF 349 fi 2> /dev/null` 350 if [ "X${maddr}" != "X" ]; then 351 set $maddr 352 route -qn add -net 224.0.0.0/4 -interface $2 > /dev/null 353 else 354 route -qn add -net 224.0.0.0/4 -interface \ 355 127.0.0.1 -reject > /dev/null 356 fi 357 ;; 358*:*) 359 echo 'config error, multicasting disabled until rc.conf is fixed' 360 route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null 361 ;; 362esac 363 364 365# Configure PPPoE, GIF, GRE interfaces, delayed because they require routes 366# to be set. PPPoE must be first, as GIF and GRE may depend on it. 367ifmstart "pppoe gif gre" 368 369# reject 127/8 other than 127.0.0.1 370route -qn add -net 127 127.0.0.1 -reject > /dev/null 371 372# Configure all the bridges. 373for bn in /etc/bridgename.*; do 374 # Strip off /etc/bridgename. prefix 375 if=${bn#/etc/bridgename.} 376 test "$if" = "*" && continue 377 378 bridgestart $if 379done 380