#!/sbin/sh
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
#
# Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#
#ident	"%Z%%M%	%I%	%E% SMI"

#
# This is third phase of TCP/IP startup/configuration.  This script
# runs after the NIS/NIS+ startup script.  We run things here that may
# depend on NIS/NIS+ maps.
#

. /lib/svc/share/smf_include.sh

case "$1" in
'start')
	#
	# In a zone we need this service to be up, but all of the work
	# it tries to do is irrelevant (and will actually lead to the service
	# failing if we try to do it), so just bail out.
	#
	smf_is_globalzone || exit 0
	;; # Fall through -- rest of script is the initialization code

'stop')
	exit 0
	;;

*)
	echo "Usage: $0 { start | stop }"
	exit 1
	;;
esac


# If boot variables are not set, set variables we use
[ -z "$_INIT_UTS_NODENAME" ] && _INIT_UTS_NODENAME=`/usr/bin/uname -n`

#
# wait_nis
# Wait up to 5 seconds for ypbind to obtain a binding.
#
wait_nis ()
{
	for i in 1 2 3 4 5; do
		server=`/usr/bin/ypwhich 2>/dev/null`
		[ $? -eq 0 -a -n "$server" ] && return 0 || sleep 1
	done
	return 1
}

#
# This function takes two file names and the file mode as input. The two
# files are compared for differences (using cmp(1)) and if different, the
# second file is over written with the first. A chmod is done with the file
# mode passed in. If the files are equal, the first file passed
# in (the /tmp file) is deleted.
#
mv_file ()
{
	/usr/bin/cmp -s $1 $2
	if [ $? -eq 1 ]; then
		/usr/bin/mv $1 $2
		#
		# The umask during boot is configurable, which requires
		# explicit setting of file permission modes when we
		# create files.
		#
		/usr/bin/chmod $3 $2
	else
		/usr/bin/rm $1
	fi
}

#
# update_nss
# This routine takes as a parameter, the name of the respective policy 
# to change in the nsswitch.conf (hosts or ipnodes) to update with dns.
#
update_nss ()
{
	policy=$1;
	# Add dns to the nsswitch file, if it isn't already there.
	/usr/bin/awk ' $1 ~ /^'${policy}':/ {
		n = split($0, a);
		newl = a[1];
		if ($0 !~ /dns/) {
			printf("#%s # Commented out by DHCP\n", $0);
			updated = 0;
			for (i = 2; i <= n; i++) {
				if (updated == 0 && index(a[i], "[") == 1) {
					newl = newl" dns";
					updated++;
				}
				newl = newl" "a[i];
			}
			if (updated == 0) {
				newl = newl" dns";
				updated++;
			}
			if (updated != 0)
				newl = newl" # Added by DHCP";
			else
				newl = $0;
			printf("%s\n", newl);
		} else
			printf("%s\n", $0);
	} $1 !~ /^'${policy}':/ { printf("%s\n", $0); }' /etc/nsswitch.conf \
	    >/tmp/nsswitch.conf.$$

	mv_file /tmp/nsswitch.conf.$$ /etc/nsswitch.conf 644
}

#
# update_hosts_file
# This routine updates the /etc/inet/hosts file with the hostname and IP
# address that was obtained via DHCP.
#
update_hosts_file ()
{
	filename=hosts
	# Delete any old lines added by dhcp.
	/usr/bin/sed -e '/# Added by DHCP$/d' /etc/inet/${filename} \
	    > /tmp/${filename}_clear.$$

	shift $#	# Clear $0-9 first in case grep fails
	set -- `/usr/bin/grep "^[ 	]*$ipaddr[ 	]" \
	    /tmp/${filename}_clear.$$ 2>/dev/null`

	if [ $# -gt 0 ]; then
		#
		# IP address is already in the file. Ensure the
		# associated hostname is the same as the Hostname
		# property returned by the DHCP server.
		#
		/usr/bin/sed -e "/^[ 	]*${ipaddr}[ 	]/d" \
		    /tmp/${filename}_clear.$$ >/tmp/${filename}.$$
		echo "${ipaddr}\t${hostname}\t# Added by DHCP" \
		    >>/tmp/${filename}.$$
	else
		#
		# IP address is missing from the respective file.  Now check
		# to see if the hostname is present with a different IP.
		#
		shift $#	# Clear $0-9 in case grep fails
		set -- `/usr/bin/grep -s -v '^#' /tmp/${filename}_clear.$$ | \
		    /usr/bin/egrep "[	 ]${hostname}([	 ]|$)"`

		if [ $# -gt 0 ]; then
			#
			# Hostname is present in the file. Rewrite this line
			# to have the new IP address and the DHCP comment.
			#
			/usr/bin/sed -e "/^[ 	]*${1}[ 	]/d" \
			    /tmp/${filename}_clear.$$ >/tmp/${filename}.$$

			shift	# Shift off $1 (the old IP)

			echo "$ipaddr $*\c" | /usr/bin/tr ' ' '\t' \
			    >>/tmp/${filename}.$$

			echo "\t# Added by DHCP" >>/tmp/${filename}.$$
		else
			#
			# Hostname is not present in the named file.
			# Add a new line for the host at the end of
			# the new respective file.
			#
			/usr/bin/mv /tmp/${filename}_clear.$$ \
			    /tmp/${filename}.$$
			echo "${ipaddr}\t${hostname}\t# Added by DHCP" \
			    >>/tmp/${filename}.$$
		fi
	fi

	/usr/bin/rm -f /tmp/${filename}_clear.$$
	mv_file /tmp/${filename}.$$ /etc/inet/${filename} 444
}

#
# We now need to reset the netmask and broadcast address for our network
# interfaces.  Since this may result in a name service lookup, we want to
# now wait for NIS to come up if we previously started it.
#
domain=`/usr/bin/domainname 2>/dev/null`

[ -z "$domain" ] || [ ! -d /var/yp/binding/$domain ] || wait_nis || \
    echo "WARNING: Timed out waiting for NIS to come up" >& 2

#
# Re-set the netmask and broadcast addr for all IP interfaces.  This ifconfig
# is run here, after waiting for name services, so that "netmask +" will find
# the netmask if it lives in a NIS map. The 'D' in -auD tells ifconfig NOT to
# mess with the interface if it is under DHCP control
#
/usr/sbin/ifconfig -auD4 netmask + broadcast +

# Uncomment these lines to print complete network interface configuration
# echo "network interface configuration:"
# /usr/sbin/ifconfig -a

smf_netstrategy

if [ "$_INIT_NET_STRATEGY" = "dhcp" ]; then
	dnsservers=`/sbin/dhcpinfo DNSserv`
else
	dnsservers=""
fi

if [ -n "$dnsservers" ]; then
	#
	# Go through /etc/resolv.conf and replace any existing
	# domain or nameserver entries with new ones derived
	# from DHCP.  Note that it is important to preserve
	# order of domain entries vs. search entries; the search
	# entries are reserved for administrator customization
	# and if placed after the domain entry will override it.
	# See resolv.conf(4).
	#
	if [ ! -f /etc/resolv.conf ]; then
		/usr/bin/touch /etc/resolv.conf
	fi
	dnsdomain=`/sbin/dhcpinfo DNSdmain`
	export dnsservers dnsdomain
	/usr/bin/nawk </etc/resolv.conf >/tmp/resolv.conf.$$ '
		function writedomain() {
			if (updated == 0) {
			    	# Use only first domain, not a search list
			    	split(ENVIRON["dnsdomain"], d)
				if(length(d[1]) != 0)
					printf("domain %s\n", d[1])
			}
			++updated
		}
		$1 == "domain" { writedomain(); next }
		$1 != "nameserver" { print $0 }
		END {
			writedomain()
			n = split(ENVIRON["dnsservers"], s)
			for (i = 1; i <= n; ++i)
				printf("nameserver %s\n", s[i])
		}'
	unset dnsservers dnsdomain
	mv_file /tmp/resolv.conf.$$ /etc/resolv.conf 644
	#
	# Add dns to the nsswitch file, if it isn't already there.
	#
	update_nss hosts
	update_nss ipnodes

elif /usr/bin/grep '# Added by DHCP$' /etc/nsswitch.conf >/dev/null 2>&1; then

	# If we added DNS to the hosts and ipnodes policy in the nsswitch,
	# remove it.
	/usr/bin/sed \
	    -e '/# Added by DHCP$/d' \
	    -e 's/^\(#hosts:\)\(.*[^#]\)\(#.*\)$/hosts: \2/' \
	    -e 's/^\(#ipnodes:\)\(.*[^#]\)\(#.*\)$/ipnodes: \2/' \
	    /etc/nsswitch.conf >/tmp/nsswitch.conf.$$

	mv_file /tmp/nsswitch.conf.$$ /etc/nsswitch.conf 644
fi

if [ "$_INIT_NET_STRATEGY" = "dhcp" ]; then

	hostname=`/usr/bin/uname -n`
	ipaddr=`/sbin/dhcpinfo Yiaddr`
	update_hosts_file

else
	# We're not using a dhcp strategy, so host entries added by
	# DHCP should be removed from /etc/inet/hosts.

	if /usr/bin/grep '# Added by DHCP$' /etc/inet/hosts >/dev/null 2>&1;
	    then
		/usr/bin/sed -e '/# Added by DHCP$/d' \
		    /etc/inet/hosts > /tmp/hosts.$$
		mv_file /tmp/hosts.$$ /etc/inet/hosts 444
	fi
fi

#
# Load the IPQoS configuration.
# This is backgrounded so that any remote hostname lookups it performs
# don't unduely delay startup. Any messages go via syslog.
#

if [ -f /usr/sbin/ipqosconf -a -f /etc/inet/ipqosinit.conf ]; then
	/usr/sbin/ipqosconf -s -a /etc/inet/ipqosinit.conf &
fi

#
# Add a static route for multicast packets out our default interface.
# The default interface is the interface that corresponds to the node name.
# Run in background subshell to avoid waiting for name service.
#

(
if [ "$_INIT_NET_STRATEGY" = "dhcp" ]; then
	mcastif=`/sbin/dhcpinfo Yiaddr` || mcastif=$_INIT_UTS_NODENAME
else
	mcastif=$_INIT_UTS_NODENAME
fi

echo "Setting default IPv4 interface for multicast:" \
    "add net 224.0/4: gateway $mcastif"

/usr/sbin/route -n add -interface 224.0/4 -gateway "$mcastif" >/dev/null
) &