#!/bin/sh - # # $OpenBSD: netstart,v 1.84 2002/02/23 01:55:24 deraadt Exp $ # Returns true if $1 contains only alphanumerics isalphanumeric() { local _n _n=$1 while [ ${#_n} != 0 ]; do case $_n in [A-Za-z0-9]*) ;; *) return 1;; esac _n=${_n#?} done return 0 } # Start the $1 interface ifstart() { if=$1 # Interface names must be alphanumeric only. We check to avoid # configuring backup or temp files, and to catch the "*" case. if ! isalphanumeric "$if"; then return fi ifconfig $if > /dev/null 2>&1 if [ "$?" != "0" ]; then return fi # Now parse the hostname.* file while :; do if [ "$cmd2" ]; then # We are carrying over from the 'read dt dtaddr' # last time. set -- $cmd2 af="$1" name="$2" mask="$3" bcaddr="$4" ext1="$5" cmd2= # Make sure and get any remaining args in ext2, # like the read below i=1 while [ i -lt 6 -a -n "$1" ]; do shift; let i=i+1; done ext2="$@" else # Read the next line or exit the while loop. read af name mask bcaddr ext1 ext2 || break fi # $af can be "dhcp", "up", "rtsol", an address family, # commands, or a comment. case "$af" in "#"*|"") # skip comments and empty lines continue ;; "!"*) # parse commands cmd="${af#*!} ${name} ${mask} ${bcaddr} ${ext1} ${ext2}" ;; "bridge") cmd="echo /etc/hostname.$if: bridges now supported via bridgename.* files" ;; "dhcp") [ "$name" = "NONE" ] && name= [ "$mask" = "NONE" ] && mask= [ "$bcaddr" = "NONE" ] && bcaddr= ifconfig $if $name $mask $bcaddr $ext1 $ext2 down cmd="dhclient $if" ;; "rtsol") ifconfig $if $name $mask $bcaddr $ext1 $ext2 up rtsolif="$rtsolif $if" cmd= ;; "up") # The only one of these guaranteed to be set is $if. # The remaining ones exist so that media controls work. cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 up" ;; *) read dt dtaddr if [ "$name" = "alias" ]; then # perform a 'shift' of sorts alias=$name name=$mask mask=$bcaddr bcaddr=$ext1 ext1=$ext2 ext2= else alias= fi cmd="ifconfig $if $af $alias $name " case "$dt" in dest) cmd="$cmd $dtaddr" ;; [a-z!]*) cmd2="$dt $dtaddr" ;; esac if [ ! -n "$name" ]; then echo "/etc/hostname.$if: invalid network configuration file" return fi case $af in inet) [ "$mask" ] && cmd="$cmd netmask $mask" if [ "$bcaddr" -a "X$bcaddr" != "XNONE" ]; then cmd="$cmd broadcast $bcaddr" fi [ "$alias" ] && rtcmd=";route -n add -host $name 127.0.0.1" ;; inet6) [ "$mask" ] && cmd="$cmd prefixlen $mask" cmd="$cmd $bcaddr" ;; *) cmd="$cmd $mask $bcaddr" ;; esac cmd="$cmd $ext1 $ext2$rtcmd" rtcmd= ;; esac eval "$cmd" done < /etc/hostname.$if } # Start the $1 bridge bridgestart() { # Interface names must be alphanumeric only. We check to avoid # configuring backup or temp files, and to catch the "*" case. if ! isalphanumeric "$1"; then return fi brconfig $1 > /dev/null 2>&1 if [ "$?" != "0" ]; then return fi # Now parse the bridgename.* file # All lines are run as brconfig(8) commands. while read line ; do line=${line%%#*} # strip comments test -z "$line" && continue case "$line" in "!"*) cmd="${line#*!}" ;; *) cmd="brconfig $1 $line" ;; esac eval "$cmd" done < /etc/bridgename.$1 } # Re-read /etc/rc.conf . /etc/rc.conf # If we were invoked with a list of interface names, just reconfigure these # interfaces (or bridges) and return. if [ $1x = autobootx ]; then shift fi if [ $# -gt 0 ]; then while [ $# -gt 0 ]; do if [ -f /etc/bridgename.$1 ]; then bridgestart $1 else ifstart $1 fi shift done return fi # Otherwise, process with the complete network initialization. # /etc/myname contains my symbolic name hostname=`cat /etc/myname` hostname $hostname if [ -f /etc/defaultdomain ]; then domainname `cat /etc/defaultdomain` fi # Set the address for the loopback interface. # It will also initialize IPv6 address for lo0 (::1 and others). ifconfig lo0 inet localhost # Use loopback, not the wire. route -n add -host $hostname localhost > /dev/null route -n add -net 127 127.0.0.1 -reject > /dev/null if ifconfig lo0 inet6 >/dev/null 2>&1; then # IPv6 configurations. ip6kernel=YES # Disallow link-local unicast dest without outgoing scope identifiers. route add -inet6 fe80:: -prefixlen 10 ::1 -reject > /dev/null # Disallow site-local unicast dest without outgoing scope identifiers. # If you configure site-locals without scope id (it is permissible # config for routers that are not on scope boundary), you may want # to comment the line out. route add -inet6 fec0:: -prefixlen 10 ::1 -reject > /dev/null # Disallow "internal" addresses to appear on the wire. route add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null # Disallow packets to malicious IPv4 compatible prefix. route add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject > /dev/null route add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject > /dev/null route add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject > /dev/null route add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject > /dev/null # Disallow packets to malicious 6to4 prefix. route add -inet6 2002:e000:: -prefixlen 20 ::1 -reject > /dev/null route add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject > /dev/null route add -inet6 2002:0000:: -prefixlen 24 ::1 -reject > /dev/null route add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject > /dev/null # Completely disallow packets to IPv4 compatible prefix. # This may conflict with RFC1933 under following circumstances: # (1) An IPv6-only KAME node tries to originate packets to IPv4 # compatible destination. The KAME node has no IPv4 compatible # support. Under RFC1933, it should transmit native IPv6 # packets toward IPv4 compatible destination, hoping it would # reach a router that forwards the packet toward auto-tunnel # interface. # (2) An IPv6-only node originates a packet to an IPv4 compatible # destination. A KAME node is acting as an IPv6 router, and # asked to forward it. # Due to rare use of IPv4 compatible addresses, and security issues # with it, we disable it by default. route add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null rtsolif="" else ip6kernel=NO fi # Configure all the non-loopback interfaces which we know about. # Refer to hostname.if(5) and bridgename.if(5) for hn in /etc/hostname.*; do # Strip off /etc/hostname. prefix if=${hn#/etc/hostname.} case $if in "gif"*|"gre"*) # GIF and GRE interfaces need the routes to be setup before # they are configured. continue ;; *) ifstart $if ;; esac done if [ "$ip6kernel" = "YES" -a "x$rtsolif" != "x" ]; then fw=`sysctl -n net.inet6.ip6.forwarding` ra=`sysctl -n net.inet6.ip6.accept_rtadv` if [ "x$fw" = "x0" -a "x$ra" = "x1" ]; then echo "IPv6 autoconf:$rtsolif" rtsol $rtsolif else echo "WARNING: inconsistent config - check /etc/sysctl.conf for IPv6 autoconf" fi fi if [ "$ip6kernel" = "YES" ]; then # this is to make sure DAD is completed before going further. sleep `sysctl -n net.inet6.ip6.dad_count` sleep 1 fi # /etc/mygate, if it exists, contains the name of my gateway host # that name must be in /etc/hosts. if [ -f /etc/mygate ]; then route -n add -host default `cat /etc/mygate` fi # Multicast routing. # # The routing to the 224.0.0.0/4 net is setup according to these rules: # multicast_host multicast_router route comment # NO NO -reject no multicast # NO YES none installed daemon will run # YES/interface NO -interface YES=def. iface # Any other combination -reject config error case "$multicast_host:$multicast_router" in NO:NO) route -n add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null ;; NO:YES) ;; *:NO) set `if [ $multicast_host = YES ]; then ed -s '!route -n show -inet' < /dev/null ;; *:*) echo 'config error, multicasting disabled until rc.conf is fixed' route -n add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null ;; esac # Configure all the gif and gre interfaces which we know about. # They were delayed because they require the routes to be set. for hn in /etc/hostname.*; do # Strip off /etc/hostname. prefix if=${hn#/etc/hostname.} case $if in "gif"*|"gre"*) ifstart $if ;; *) # Regular interfaces have already been configured. continue ;; esac done # Configure all the bridges. for bn in /etc/bridgename.*; do # Strip off /etc/bridgename. prefix if=${bn#/etc/bridgename.} bridgestart $if done