#!/bin/sh - # # $OpenBSD: netstart,v 1.153 2015/07/20 06:59:39 rpe Exp $ # Turn off Strict Bourne shell mode. set +o sh # Strip comments (and leading/trailing whitespace if IFS is set) from a file # and spew to stdout. stripcom() { local _l [[ -f $1 ]] || return while read _l; do [[ -n ${_l%%#*} ]] && echo $_l done<$1 } # 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. [[ $if != +([[:alpha:]])+([[:digit:]]) ]] && return file=/etc/hostname.$if if ! [ -f $file ]; then echo "netstart: $file: No such file or directory" return fi # Not using stat(1), we can't rely on having /usr yet. set -A stat -- `ls -nL $file` if [ "${stat[0]#???????} ${stat[2]} ${stat[3]}" != "--- 0 0" ]; then echo "WARNING: $file is insecure, fixing permissions" chmod -LR o-rwx $file chown -LR root.wheel $file fi # Check for ifconfig'able interface. (ifconfig $if || ifconfig $if create) >/dev/null 2>&1 || return # Now parse the hostname.* file. while :; do if [ "$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} ${ext2}" ;; "dhcp") [ "$name" = "NONE" ] && name= [ "$mask" = "NONE" ] && mask= [ "$bcaddr" = "NONE" ] && bcaddr= cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 down" cmd="$cmd;dhclient $if" dhcpif="$dhcpif $if" ;; "rtsol") rtsolif="$rtsolif $if" 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 $dtaddr" ;; *) cmd2="$dt $dtaddr" ;; esac case $af in inet) if [ ! -n "$name" ]; then echo "/etc/hostname.$if: inet alone is invalid" return fi [ "$mask" ] && cmd="$cmd netmask $mask" if [ "$bcaddr" -a "X$bcaddr" != "XNONE" ]; then cmd="$cmd broadcast $bcaddr" fi ;; inet6) if [ ! -n "$name" ]; then echo "/etc/hostname.$if: inet6 alone is invalid" return fi [ "$mask" ] && cmd="$cmd prefixlen $mask" cmd="$cmd $bcaddr" ;; *) cmd="$cmd $mask $bcaddr" ;; esac cmd="$cmd $ext1 $ext2" ;; esac eval "$cmd" done /dev/null 2>&1; then # IPv6 configurations. ip6kernel=YES # Disallow link-local unicast dest without outgoing scope identifiers. route -qn 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 -qn add -inet6 fec0:: -prefixlen 10 ::1 -reject >/dev/null # Disallow "internal" addresses to appear on the wire. route -qn add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject >/dev/null # Disallow packets to malicious IPv4 compatible prefix. route -qn add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject >/dev/null route -qn add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject >/dev/null route -qn add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject >/dev/null route -qn add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject >/dev/null # Disallow packets to malicious 6to4 prefix. route -qn add -inet6 2002:e000:: -prefixlen 20 ::1 -reject >/dev/null route -qn add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject >/dev/null route -qn add -inet6 2002:0000:: -prefixlen 24 ::1 -reject >/dev/null route -qn add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject >/dev/null # Disallow packets without scope identifier. route -qn add -inet6 ff01:: -prefixlen 16 ::1 -reject >/dev/null route -qn add -inet6 ff02:: -prefixlen 16 ::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 -qn 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, but # do not start interfaces which must be delayed. Refer to hostname.if(5) ifmstart "" "trunk svlan vlan carp gif gre pfsync pppoe tun bridge pflow" # The trunk interfaces need to come up first in this list. # The (s)vlan interfaces need to come up after trunk. # Configure all the carp interfaces which we know about before default route. ifmstart "trunk svlan vlan carp" if [ "$ip6kernel" = "YES" -a "x$rtsolif" != "x" ]; then echo "IPv6 autoconf:$rtsolif" ifconfig $rtsolif inet6 autoconf fi # Look for default routes in /etc/mygate. [[ -z $dhcpif ]] && stripcom /etc/mygate | while read gw; do [[ $gw == @(*:*) ]] && continue route -qn delete default >/dev/null 2>&1 route -qn add -host default $gw && break done [[ -z $rtsolif ]] && stripcom /etc/mygate | while read gw; do [[ $gw == !(*:*) ]] && continue route -qn delete -inet6 default >/dev/null 2>&1 route -qn add -host -inet6 default $gw && break done # Multicast routing. # # The routing to the 224.0.0.0/4 net is setup according to these rules: # multicast_host multicast_router route comment # NO NO -reject no multicast # NO YES none installed daemon will run # YES/interface NO -interface YES=def. iface # Any other combination -reject config error route -qn delete 224.0.0.0/4 >/dev/null 2>&1 case "$multicast_host:$multicast_router" in NO:NO) route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject >/dev/null ;; NO:YES) ;; *:NO) maddr=`if [ "$multicast_host" = "YES" ]; then ed -s '!route -qn show -inet' </dev/null` if [ "X${maddr}" != "X" ]; then set $maddr route -qn add -net 224.0.0.0/4 -interface $2 >/dev/null else route -qn add -net 224.0.0.0/4 -interface \ 127.0.0.1 -reject >/dev/null fi ;; *:*) echo 'config error, multicasting disabled until rc.conf is fixed' route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject >/dev/null ;; esac # Configure PPPoE, GIF, GRE, TUN and PFLOW interfaces, delayed because they # require routes to be set. TUN might depend on PPPoE, and GIF or GRE may # depend on either of them. PFLOW might bind to ip addresses configured # on either of them. ifmstart "pppoe tun gif gre bridge pflow" # Reject 127/8 other than 127.0.0.1. route -qn add -net 127 127.0.0.1 -reject >/dev/null if [ "$ip6kernel" = "YES" ]; then # This is to make sure DAD is completed before going further. count=0 while [ $((count++)) -lt 10 -a "x"`sysctl -n net.inet6.ip6.dad_pending` != "x0" ]; do sleep 1 done fi