#!/bin/bash
# Network Interface Configuration System
# Copyright (c) 1996-2013 Red Hat, Inc. all rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2,
# as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

. /etc/init.d/functions

cd /etc/sysconfig/network-scripts
. ./network-functions

[ -f ../network ] && . ../network

CONFIG="${1}"

need_config "${CONFIG}"

source_config

if [ "${BOOTPROTO}" = "dhcp" ]; then
    DYNCONFIG=true
fi

# load the module associated with that device
# /sbin/modprobe ${REALDEVICE}
is_available ${REALDEVICE}

# bail out, if the MAC does not fit
if [ -n "${HWADDR}" ]; then
	FOUNDMACADDR=$(get_hwaddr ${REALDEVICE})
	if [ "${FOUNDMACADDR}" != "${HWADDR}" -a "${FOUNDMACADDR}" != "${MACADDR}" ]; then
		net_log $"Device ${DEVICE} has different MAC address than expected, ignoring."
		exit 1
	fi
fi

# now check the real state
is_available ${REALDEVICE} || {
      if [ -n "$alias" ]; then
         net_log $"$alias device ${DEVICE} does not seem to be present, delaying initialization."
      else
         net_log $"Device ${DEVICE} does not seem to be present, delaying initialization."
      fi
      exit 1
}

# if we are a pkey device, create the device if needed
if [ "${VLAN}" = yes ]; then
	[ -z "${VLAN_ID}" ] && {
		echo "VLAN=yes requires a VLAN_ID"
		exit 1
	}
	# Normalize our VLAN_ID to have the high bit set
	NEW_VLAN_ID=`printf "0x%04x" $(( 0x8000 | ${VLAN_ID} ))`
	NEW_VLAN_NAME=`printf "%04x" ${NEW_VLAN_ID}`
	[ "${DEVICE}" != "${REALDEVICE}.${NEW_VLAN_NAME}" ] && {
		echo "The high bit of the VLAN_ID must be set and the DEVICE="
		echo "entry in the config file must be the same as the PARENTDEVICE.VLAN_ID"
		echo "Configured DEVICE=$DEVICE"
		echo "Configured PARENTDEVICE=$PARENTDEVICE"
		echo "Calculated REALDEVICE=$REALDEVICE"
		echo "Configured VLAN_ID=$VLAN_ID"
		echo "Calculated VLAN_ID=$NEW_VLAN_ID"
		exit 1
	}
	[ -d "/sys/class/net/${DEVICE}" ] ||
		echo "${NEW_VLAN_ID}" > "/sys/class/net/${REALDEVICE}/create_child"
	[ -d "/sys/class/net/${DEVICE}" ] || {
		echo "Failed to create child device $NEW_VLAN_ID of $REALDEVICE"
		exit 1
	}
	# When we get to setting up the IP address, we need REALDEVICE to
	# point to our new VLAN device
	REALDEVICE="${DEVICE}"
fi


# this isn't the same as the MAC in the configuration filename.  It is
# available as a configuration option in the config file, forcing the kernel
# to think an ethernet card has a different MAC address than it really has.
if [ -n "${MACADDR}" ]; then
   ip link set dev ${DEVICE} address ${MACADDR}
fi

# First, do we even support setting connected mode?
if [ -e /sys/class/net/${DEVICE}/mode ]; then
    # OK, set the mode in all cases, that way it gets reset on a down/up
    # cycle, allowing people to change the mode without rebooting
    if [ "${CONNECTED_MODE}" = yes ]; then
        echo connected > /sys/class/net/${DEVICE}/mode
	# cap the MTU where we should based upon mode
	[ -z "$MTU" ] && MTU=65520
	[ "$MTU" -gt 65520 ] && MTU=65520
    else
        echo datagram > /sys/class/net/${DEVICE}/mode
	# cap the MTU where we should based upon mode
	[ -z "$MTU" ] && MTU=2044
	[ "$MTU" -gt 2044 ] && MTU=2044
    fi
fi

if [ -n "${MTU}" ]; then
    ip link set dev ${DEVICE} mtu ${MTU}
fi

# slave device?
if [ "${SLAVE}" = yes -a "${ISALIAS}" = no -a "${MASTER}" != "" ]; then
    install_bonding_driver ${MASTER}
    grep -wq "${DEVICE}" /sys/class/net/${MASTER}/bonding/slaves 2>/dev/null || {
	/sbin/ip link set dev ${DEVICE} down
	echo "+${DEVICE}" > /sys/class/net/${MASTER}/bonding/slaves 2>/dev/null
    }
    ethtool_set

    exit 0
fi

# Bonding initialization. For DHCP, we need to enslave the devices early,
# so it can actually get an IP.
if [ "$ISALIAS" = no ] && is_bonding_device ${DEVICE} ; then
    install_bonding_driver ${DEVICE}
    /sbin/ip link set dev ${DEVICE} up
    for device in $(LANG=C grep -l "^[[:space:]]*MASTER=\"\?${DEVICE}\"\?\([[:space:]#]\|$\)" /etc/sysconfig/network-scripts/ifcfg-*) ; do
	    is_ignored_file "$device" && continue
	    /sbin/ifup ${device##*/}
    done

    [ -n "${LINKDELAY}" ] && /bin/sleep ${LINKDELAY}

    # add the bits to setup the needed post enslavement parameters
    for arg in $BONDING_OPTS ; do   
        key=${arg%%=*};
        value=${arg##*=};
	if [ "${key}" = "primary" ]; then 
            echo $value > /sys/class/net/${DEVICE}/bonding/$key
	fi
    done
fi

		     
if [ -n "${DYNCONFIG}" ] && [ -x /sbin/dhclient ]; then
    if [[ "${PERSISTENT_DHCLIENT}" =  [yY1]* ]]; then
       ONESHOT="";
    else
       ONESHOT="-1";
    fi;
    generate_config_file_name
    generate_lease_file_name
    DHCLIENTARGS="${DHCLIENTARGS} -H ${DHCP_HOSTNAME:-${HOSTNAME%%.*}} ${ONESHOT} -q ${DHCLIENTCONF} -lf ${LEASEFILE} -pf /var/run/dhclient-${DEVICE}.pid"
    echo
    echo -n $"Determining IP information for ${DEVICE}..."
    if [[ "${PERSISTENT_DHCLIENT}" !=  [yY1]* ]] && check_link_down ${DEVICE}; then
	echo $" failed; no link present.  Check cable?"
	exit 1
    fi

    ethtool_set

    if /sbin/dhclient ${DHCLIENTARGS} ${DEVICE} ; then
	echo $" done."
	dhcpipv4="good"
    else
	echo $" failed."
	if [[ "${IPV4_FAILURE_FATAL}"  = [Yy1]* ]] ; then
	    exit 1
	fi
	if [[ "$IPV6INIT" != [yY1]* && "$DHCPV6C" != [yY1]* ]] ; then
	    exit 1
	fi
	net_log "Unable to obtain IPv4 DHCP address ${DEVICE}." warning
    fi
# end dynamic device configuration
else 
    if [ -z "${IPADDR}" -a -z "${IPADDR0}" -a -z "${IPADDR1}" -a -z "${IPADDR2}" ]; then
         # enable device without IP, useful for e.g. PPPoE
	 ip link set dev ${REALDEVICE} up
	 ethtool_set
	 [ -n "${LINKDELAY}" ] && /bin/sleep ${LINKDELAY}
    else
  
    expand_config

    [ -n "${ARP}" ] && \
	ip link set dev ${REALDEVICE} $(toggle_value arp $ARP)
   
    if ! ip link set dev ${REALDEVICE} up ; then
	net_log $"Failed to bring up ${DEVICE}."
	exit 1
    fi

    ethtool_set

    [ -n "${LINKDELAY}" ] && /bin/sleep ${LINKDELAY}

    if [ "${DEVICE}" = "lo" ]; then
    	SCOPE="scope host"
    else
        SCOPE=${SCOPE:-}
    fi
    
    if [ -n "$SRCADDR" ]; then
       SRC="src $SRCADDR"
    else
       SRC=
    fi
    
    # set IP address(es)
    for idx in {0..256} ; do
	if [ -z "${ipaddr[$idx]}" ]; then
	    break
	fi

	if ! LC_ALL=C ip addr ls ${REALDEVICE} | LC_ALL=C grep -q "${ipaddr[$idx]}/${prefix[$idx]}" ; then
	    [ "${REALDEVICE}" != "lo" ] && [ "${arpcheck[$idx]}" != "no" ] && \
	    /sbin/arping -q -c 2 -w 3 -D -I ${REALDEVICE} ${ipaddr[$idx]}
	    if [ $? = 1 ]; then
		net_log $"Error, some other host already uses address ${ipaddr[$idx]}."
		exit 1
	    fi
	   
	    if ! ip addr add ${ipaddr[$idx]}/${prefix[$idx]} \
		brd ${broadcast[$idx]:-+} dev ${REALDEVICE} ${SCOPE} label ${DEVICE}; then
		net_log $"Error adding address ${ipaddr[$idx]} for ${DEVICE}."
	    fi
	fi 
    
	if [ -n "$SRCADDR" ]; then
           sysctl -w "net.ipv4.conf.${REALDEVICE}.arp_filter=1" >/dev/null 2>&1
	fi

	# update ARP cache of neighboring computers
	if [ "${REALDEVICE}" != "lo" ]; then
	    /sbin/arping -q -A -c 1 -I ${REALDEVICE} ${ipaddr[$idx]}
	    ( sleep 2;
	      /sbin/arping -q -U -c 1 -I ${REALDEVICE} ${ipaddr[$idx]} ) > /dev/null 2>&1 < /dev/null &
	fi
    done

    # Set a default route.
    if [ "${DEFROUTE}" != "no" ] && [ -z "${GATEWAYDEV}" -o "${GATEWAYDEV}" = "${REALDEVICE}" ]; then
	# set up default gateway. replace if one already exists
	if [ -n "${GATEWAY}" ] && [ "$(ipcalc --network ${GATEWAY} ${netmask[0]} 2>/dev/null)" = "NETWORK=${NETWORK}" ]; then
	    ip route replace default ${METRIC:+metric $METRIC} \
		via ${GATEWAY} ${WINDOW:+window $WINDOW} ${SRC} \
		${GATEWAYDEV:+dev $GATEWAYDEV} ||
			net_log $"Error adding default gateway ${GATEWAY} for ${DEVICE}."
	elif [ "${GATEWAYDEV}" = "${DEVICE}" ]; then
	    ip route replace default ${METRIC:+metric $METRIC} \
		${SRC} ${WINDOW:+window $WINDOW} dev ${REALDEVICE} ||
			net_log $"Erorr adding default gateway for ${REALDEVICE}."
	fi
    fi
    fi
fi

# Add Zeroconf route.
if [ -z "${NOZEROCONF}" -a "${ISALIAS}" = "no" -a "${REALDEVICE}" != "lo" ]; then
    ip route add 169.254.0.0/16 dev ${REALDEVICE} metric $((1000 + $(cat /sys/class/net/${REALDEVICE}/ifindex))) scope link
fi

# Inform firewall which network zone (empty means default) this interface belongs to
if [ -x /usr/bin/firewall-cmd -a "${REALDEVICE}" != "lo" ]; then
    /usr/bin/firewall-cmd --zone="${ZONE}" --change-interface="${DEVICE}" > /dev/null 2>&1
fi

# IPv6 initialisation?
/etc/sysconfig/network-scripts/ifup-ipv6 ${CONFIG}
if [[ "${DHCPV6C}"  = [Yy1]* ]] && [ -x /sbin/dhclient ]; then
    generate_config_file_name 6
    generate_lease_file_name 6
    echo
    echo -n $"Determining IPv6 information for ${DEVICE}..."
    if /sbin/dhclient -6 -1 ${DHCPV6C_OPTIONS} ${DHCLIENTCONF} -lf ${LEASEFILE} -pf /var/run/dhclient6-${DEVICE}.pid -H ${DHCP_HOSTNAME:-${HOSTNAME%%.*}} ${DEVICE} ; then
        echo $" done."
    else
        echo $" failed."
        if [ "${dhcpipv4}" = "good" -o -n "${IPADDR}" ]; then
            net_log "Unable to obtain IPv6 DHCP address ${DEVICE}." warning
        else
            exit 1
        fi
    fi
fi

exec /etc/sysconfig/network-scripts/ifup-post ${CONFIG} ${2}