File: [local] / src / etc / netstart (download)
Revision 1.96, Mon Mar 22 04:31:42 2004 UTC (20 years, 2 months ago) by mcbride
Branch: MAIN
CVS Tags: OPENBSD_3_5_BASE, OPENBSD_3_5 Changes since 1.95: +8 -3 lines
Make sure pfsync is brought up before carp.
ok deraadt@
|
#!/bin/sh -
#
# $OpenBSD: netstart,v 1.96 2004/03/22 04:31:42 mcbride 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
# Try to create interface if it does not exist
ifconfig $if create > /dev/null 2>&1
if [ "$?" != "0" ]; then
return
fi
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 -qn 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
# Try to create interface if it does not exist
ifconfig $if create > /dev/null 2>&1
if [ "$?" != "0" ]; then
return
fi
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
if [ -f /etc/myname ]; then
hostname=`cat /etc/myname`
hostname $hostname
else
hostname=`hostname`
fi
if [ -f /etc/defaultdomain ]; then
domainname `cat /etc/defaultdomain`
fi
# Set the address for the loopback interface. Bringing the
# interface up, automatically invokes the IPv6 address ::1)
ifconfig lo0 inet 127.0.0.1
if ifconfig lo0 inet6 >/dev/null 2>&1; then
# IPv6 configurations.
ip6kernel=YES
# Disallow link-local unicast dest without outgoing scope identifiers.
route -q 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 -q add -inet6 fec0:: -prefixlen 10 ::1 -reject > /dev/null
# Disallow "internal" addresses to appear on the wire.
route -q add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null
# Disallow packets to malicious IPv4 compatible prefix.
route -q add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject > /dev/null
route -q add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
route -q add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
route -q add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
# Disallow packets to malicious 6to4 prefix.
route -q add -inet6 2002:e000:: -prefixlen 20 ::1 -reject > /dev/null
route -q add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject > /dev/null
route -q add -inet6 2002:0000:: -prefixlen 24 ::1 -reject > /dev/null
route -q 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 -q 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.}
test "$if" = "*" && continue
case $if in
"carp"*|"gif"*|"gre"*|"pfsync"*)
# CARP, GIF, GRE and PFSYNC 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`
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 delete default > /dev/null 2>&1
route -qn 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 -qn 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 -qn show -inet' <<EOF
/^default/p
EOF
else
ed -s "!ifconfig $multicast_host" <<EOF
/^ inet /p
EOF
fi`
route -qn add -net 224.0.0.0/4 -interface $2 > /dev/null
;;
*:*)
echo 'config error, multicasting disabled until rc.conf is fixed'
route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null
;;
esac
# The pfsync interface needs to come up before carp.
if [ -f /etc/hostname.pfsync0 ]; then
ifstart pfsync0
fi
# Configure all the carp, gif and gre interfaces which we know about.
# They were delayed because they require the routes to be set.
for hn in /etc/hostname.*; do
# Strip off /etc/hostname. prefix
if=${hn#/etc/hostname.}
test "$if" = "*" && continue
case $if in
"carp"*|"gif"*|"gre"*)
ifstart $if
;;
*)
# Regular interfaces have already been configured.
continue
;;
esac
done
# Use loopback, not the wire.
route -qn add -host $hostname 127.0.0.1 > /dev/null
route -qn add -net 127 127.0.0.1 -reject > /dev/null
# Configure all the bridges.
for bn in /etc/bridgename.*; do
# Strip off /etc/bridgename. prefix
if=${bn#/etc/bridgename.}
test "$if" = "*" && continue
bridgestart $if
done