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#!/bin/sh -
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#
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# $OpenBSD: netstart,v 1.151 2015/07/19 19:52:36 rpe Exp $
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# Strip comments (and leading/trailing whitespace if IFS is set) from a file
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# and spew to stdout.
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stripcom() {
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local _l
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[[ -f $1 ]] || return
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while read _l; do
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[[ -n ${_l%%#*} ]] && echo $_l
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done<$1
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}
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# Start the $1 interface.
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ifstart() {
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if=$1
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# Interface names must be alphanumeric only. We check to avoid
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# configuring backup or temp files, and to catch the "*" case.
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[[ $if != +([[:alpha:]])+([[:digit:]]) ]] && return
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file=/etc/hostname.$if
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if ! [ -f $file ]; then
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echo "netstart: $file: No such file or directory"
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return
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fi
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# Not using stat(1), we can't rely on having /usr yet.
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set -A stat -- `ls -nL $file`
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if [ "${stat[0]#???????} ${stat[2]} ${stat[3]}" != "--- 0 0" ]; then
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echo "WARNING: $file is insecure, fixing permissions"
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chmod -LR o-rwx $file
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chown -LR root.wheel $file
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fi
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# Check for ifconfig'able interface.
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(ifconfig $if || ifconfig $if create) >/dev/null 2>&1 || return
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# Now parse the hostname.* file.
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while :; do
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if [ "$cmd2" ]; then
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# We are carrying over from the 'read dt dtaddr'
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# last time.
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set -- $cmd2
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af="$1" name="$2" mask="$3" bcaddr="$4" ext1="$5" cmd2=
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# Make sure and get any remaining args in ext2,
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# like the read below.
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i=1
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while [ $i -lt 6 -a -n "$1" ]; do shift; let i=i+1; done
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ext2="$@"
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else
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# Read the next line or exit the while loop.
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read af name mask bcaddr ext1 ext2 || break
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fi
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# $af can be "dhcp", "up", "rtsol", an address family, commands,
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# or a comment.
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case "$af" in
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"#"*|"") # Skip comments and empty lines.
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continue
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;;
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"!"*) # Parse commands.
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cmd="${af#*!} ${name} ${mask} ${bcaddr} ${ext1} ${ext2}"
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;;
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"dhcp")
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[ "$name" = "NONE" ] && name=
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[ "$mask" = "NONE" ] && mask=
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[ "$bcaddr" = "NONE" ] && bcaddr=
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cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 down"
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cmd="$cmd;dhclient $if"
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dhcpif="$dhcpif $if"
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;;
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"rtsol")
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rtsolif="$rtsolif $if"
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cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 up"
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;;
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*)
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read dt dtaddr
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if [ "$name" = "alias" ]; then
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# Perform a 'shift' of sorts.
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alias=$name
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name=$mask
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mask=$bcaddr
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bcaddr=$ext1
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ext1=$ext2
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ext2=
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else
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alias=
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fi
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cmd="ifconfig $if $af $alias $name"
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case "$dt" in
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dest)
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cmd="$cmd $dtaddr"
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;;
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*)
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cmd2="$dt $dtaddr"
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;;
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esac
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case $af in
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inet)
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if [ ! -n "$name" ]; then
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echo "/etc/hostname.$if: inet alone is invalid"
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return
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fi
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[ "$mask" ] && cmd="$cmd netmask $mask"
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if [ "$bcaddr" -a "X$bcaddr" != "XNONE" ]; then
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cmd="$cmd broadcast $bcaddr"
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fi
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;;
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inet6)
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if [ ! -n "$name" ]; then
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echo "/etc/hostname.$if: inet6 alone is invalid"
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return
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fi
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[ "$mask" ] && cmd="$cmd prefixlen $mask"
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cmd="$cmd $bcaddr"
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;;
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*)
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cmd="$cmd $mask $bcaddr"
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;;
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esac
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cmd="$cmd $ext1 $ext2"
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;;
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esac
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eval "$cmd"
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done </etc/hostname.$if
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}
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# Start multiple:
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# Usage: ifmstart "if1 if2" "if3 if4"
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# Start "$1" interfaces in order or all interfaces if empty.
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# Don't start "$2" interfaces.
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ifmstart() {
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for sif in ${1:-ALL}; do
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for hn in /etc/hostname.*; do
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# Strip off /etc/hostname. prefix.
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if=${hn#/etc/hostname.}
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[ "$if" = "*" ] && continue
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# Skip unwanted ifs.
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s=""
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for xf in $2; do
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[ "$xf" = "${if%%[0-9]*}" ] && s="1" && break
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done
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[ "$s" = "1" ] && continue
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# Start wanted ifs.
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[ "$sif" = "ALL" -o "$sif" = "${if%%[0-9]*}" ] &&
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ifstart $if
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done
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done
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}
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# Get network related vars from rc.conf using the parsing routine from rc.subr.
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FUNCS_ONLY=1 . /etc/rc.d/rc.subr
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_rc_parse_conf
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# If we were invoked with a list of interface names, just reconfigure these
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# interfaces (or bridges) and return.
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if [[ $1 == autoboot ]]; then
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shift
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fi
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if [ $# -gt 0 ]; then
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while [ $# -gt 0 ]; do
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ifstart $1
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shift
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done
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return
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fi
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# Otherwise, process with the complete network initialization.
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# /etc/myname contains my symbolic name.
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if [ -f /etc/myname ]; then
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hostname=`stripcom /etc/myname`
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hostname $hostname
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else
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hostname=`hostname`
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fi
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# Set the address for the loopback interface. Bringing the interface up,
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# automatically invokes the IPv6 address ::1.
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ifconfig lo0 inet 127.0.0.1/8
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if ifconfig lo0 inet6 >/dev/null 2>&1; then
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# IPv6 configurations.
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ip6kernel=YES
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# Disallow link-local unicast dest without outgoing scope identifiers.
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route -qn add -inet6 fe80:: -prefixlen 10 ::1 -reject >/dev/null
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# Disallow site-local unicast dest without outgoing scope identifiers.
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# If you configure site-locals without scope id (it is permissible
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# config for routers that are not on scope boundary), you may want
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# to comment the line out.
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route -qn add -inet6 fec0:: -prefixlen 10 ::1 -reject >/dev/null
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# Disallow "internal" addresses to appear on the wire.
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route -qn add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject >/dev/null
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# Disallow packets to malicious IPv4 compatible prefix.
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route -qn add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject >/dev/null
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route -qn add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject >/dev/null
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route -qn add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject >/dev/null
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route -qn add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject >/dev/null
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# Disallow packets to malicious 6to4 prefix.
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route -qn add -inet6 2002:e000:: -prefixlen 20 ::1 -reject >/dev/null
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route -qn add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject >/dev/null
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route -qn add -inet6 2002:0000:: -prefixlen 24 ::1 -reject >/dev/null
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route -qn add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject >/dev/null
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# Disallow packets without scope identifier.
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route -qn add -inet6 ff01:: -prefixlen 16 ::1 -reject >/dev/null
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route -qn add -inet6 ff02:: -prefixlen 16 ::1 -reject >/dev/null
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# Completely disallow packets to IPv4 compatible prefix.
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#
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# This may conflict with RFC1933 under following circumstances:
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# (1) An IPv6-only KAME node tries to originate packets to IPv4
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# compatible destination. The KAME node has no IPv4 compatible
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# support. Under RFC1933, it should transmit native IPv6
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# packets toward IPv4 compatible destination, hoping it would
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# reach a router that forwards the packet toward auto-tunnel
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# interface.
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# (2) An IPv6-only node originates a packet to an IPv4 compatible
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# destination. A KAME node is acting as an IPv6 router, and
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# asked to forward it.
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#
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# Due to rare use of IPv4 compatible addresses, and security issues
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# with it, we disable it by default.
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route -qn add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject >/dev/null
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rtsolif=""
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else
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ip6kernel=NO
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fi
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# Configure all the non-loopback interfaces which we know about, but
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# do not start interfaces which must be delayed. Refer to hostname.if(5)
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ifmstart "" "trunk svlan vlan carp gif gre pfsync pppoe tun bridge"
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# The trunk interfaces need to come up first in this list.
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# The (s)vlan interfaces need to come up after trunk.
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# Configure all the carp interfaces which we know about before default route.
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ifmstart "trunk svlan vlan carp"
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if [ "$ip6kernel" = "YES" -a "x$rtsolif" != "x" ]; then
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echo "IPv6 autoconf:$rtsolif"
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ifconfig $rtsolif inet6 autoconf
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fi
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# Look for default routes in /etc/mygate.
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[[ -z $dhcpif ]] && stripcom /etc/mygate | while read gw; do
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[[ $gw == @(*:*) ]] && continue
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route -qn delete default >/dev/null 2>&1
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route -qn add -host default $gw && break
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done
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[[ -z $rtsolif ]] && stripcom /etc/mygate | while read gw; do
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[[ $gw == !(*:*) ]] && continue
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route -qn delete -inet6 default >/dev/null 2>&1
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route -qn add -host -inet6 default $gw && break
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done
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# Multicast routing.
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#
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# The routing to the 224.0.0.0/4 net is setup according to these rules:
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# multicast_host multicast_router route comment
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# NO NO -reject no multicast
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# NO YES none installed daemon will run
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# YES/interface NO -interface YES=def. iface
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# Any other combination -reject config error
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route -qn delete 224.0.0.0/4 >/dev/null 2>&1
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case "$multicast_host:$multicast_router" in
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NO:NO)
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route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject >/dev/null
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;;
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NO:YES)
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;;
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*:NO)
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maddr=`if [ "$multicast_host" = "YES" ]; then
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ed -s '!route -qn show -inet' <<EOF
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/^default/p
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EOF
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else
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ed -s "!ifconfig $multicast_host" <<EOF
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/^ inet /p
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EOF
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fi 2>/dev/null`
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if [ "X${maddr}" != "X" ]; then
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set $maddr
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route -qn add -net 224.0.0.0/4 -interface $2 >/dev/null
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else
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route -qn add -net 224.0.0.0/4 -interface \
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127.0.0.1 -reject >/dev/null
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fi
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;;
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*:*)
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echo 'config error, multicasting disabled until rc.conf is fixed'
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route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject >/dev/null
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;;
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esac
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# Configure PPPoE, GIF, GRE and TUN interfaces, delayed because they require
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# routes to be set. TUN might depend on PPPoE, and GIF or GRE may depend on
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# either of them.
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ifmstart "pppoe tun gif gre bridge"
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# Reject 127/8 other than 127.0.0.1.
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route -qn add -net 127 127.0.0.1 -reject >/dev/null
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if [ "$ip6kernel" = "YES" ]; then
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# This is to make sure DAD is completed before going further.
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count=0
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while [ $((count++)) -lt 10 -a "x"`sysctl -n net.inet6.ip6.dad_pending` != "x0" ]; do
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sleep 1
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done
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fi
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