#!/bin/bash # /etc/rc.d/rc.inet1 # This script is used to bring up the various network interfaces. # # @(#)/etc/rc.d/rc.inet1 15.0 Wed Nov 10 08:17:22 UTC 2021 (pjv) # If we are in an lxc container, set $container to skip parts of the script. # Thanks to Matteo Bernardini and Chris Willing for # the initial work making this script lxc compatible. if grep -aq container=lxc /proc/1/environ 2> /dev/null ; then container="lxc" fi ############################ # READ NETWORK CONFIG FILE # ############################ # Get the configuration information from /etc/rc.d/rc.inet1.conf: . /etc/rc.d/rc.inet1.conf ########### # LOGGING # ########### # Message logging. info_log() { # If possible, log events in /var/log/messages: if [ -f /var/run/syslogd.pid ] && [ -x /usr/bin/logger ]; then /usr/bin/logger -t "rc.inet1" --id="$$" "$*" else printf "%s: %s\\n" "rc.inet1" "$*" fi } # Verbose logging. debug_log() { if [ "$DEBUG_ETH_UP" = "yes" ]; then info_log "$*" fi } ############################ # DETERMINE INTERFACE LIST # ############################ # Compose a list of interfaces from /etc/rc.d/rc.inet1.conf (with a maximum # of 6 interfaces, but you can easily enlarge the interface limit # - send me a picture of such a box :-). # If a value for IFNAME[n] is not set, we assume it is an eth'n' interface. # This way, the new script is compatible with older rc.inet1.conf files. # The IFNAME array will be used to determine which interfaces to bring up/down. MAXNICS=${MAXNICS:-6} i=0 while [ $i -lt $MAXNICS ]; do IFNAME[$i]=${IFNAME[$i]:=eth${i}} i=$((i+1)) done debug_log "List of interfaces: ${IFNAME[*]}" #################### # PRE-LOAD MODULES # #################### for i in "${IFNAME[@]}"; do # If the interface isn't in the kernel yet (but there's an alias for it in modules.conf), # then it should be loaded first: if [ ! -e /sys/class/net/${i%%[:.]*} ]; then # no interface yet if /sbin/modprobe -c | grep -v "^#" | grep -w "alias ${i%%[:.]*}" | grep -vw "alias ${i%%[:.]*} off" >/dev/null; then debug_log "/sbin/modprobe ${i%%[:.]*}" /sbin/modprobe ${i%%[:.]*} _DID_MODPROBE=1 fi fi done # Normally the ipv6 module would be automatically loaded when the first IP is assigned to an # interface (assuming ipv6 has not been disabled entirely), but autoconf/accept_ra need to be # set to 0 before that happens, so try to pre-load ipv6 here. if [ ! -e /proc/sys/net/ipv6 ]; then debug_log "/sbin/modprobe ipv6" /sbin/modprobe -q ipv6 _DID_MODPROBE=1 fi # If we did any module loading in the blocks above, sleep for a couple of # seconds to give time for everything to "take" [ -n "${_DID_MODPROBE}" ] && sleep 2 unset _DID_MODPROBE ###################### # LOOPBACK FUNCTIONS # ###################### # Function to bring up the loopback interface. If loopback is # already up, do nothing. lo_up() { if [ -e /sys/class/net/lo ]; then if ! /sbin/ip link show dev lo | grep -wq -e "state UP" -e "state UNKNOWN" ; then info_log "lo: configuring interface" debug_log "/sbin/ip -4 address add 127.0.0.1/8 dev lo" /sbin/ip -4 address add 127.0.0.1/8 dev lo if [ -e /proc/sys/net/ipv6 ]; then debug_log "/sbin/ip -6 address add ::1/128 dev lo" /sbin/ip -6 address add ::1/128 dev lo fi debug_log "/sbin/ip link set dev lo up" /sbin/ip link set dev lo up debug_log "/sbin/ip route add 127.0.0.0/8 dev lo" /sbin/ip route add 127.0.0.0/8 dev lo fi fi } # Function to take down the loopback interface: lo_down() { if [ -e /sys/class/net/lo ]; then info_log "lo: de-configuring interface" debug_log "/sbin/ip address flush dev lo" /sbin/ip address flush dev lo debug_log "/sbin/ip link set dev lo down" /sbin/ip link set dev lo down fi } ####################### # INTERFACE FUNCTIONS # ####################### # Function to create virtual interfaces virtif_create() { # argument is 'i' - the position of this interface in the VIRTIFNAME array. # this loop goes from i=0 to i=number_of_configured_virtual_interfaces_minus_one # which means it doesn't do anything if there are none. for i in $(seq 0 $((${#VIRTIFNAME[@]} - 1))); do info_log "${VIRTIFNAME[$i]}: creating virtual interface" debug_log "/sbin/ip tuntap add dev ${VIRTIFNAME[$i]} mode ${VIRTIFTYPE[$i]} user ${VIRTIFUSER[$i]} group ${VIRTIFGROUP[$i]}" /sbin/ip tuntap add dev ${VIRTIFNAME[$i]} mode ${VIRTIFTYPE[$i]} user ${VIRTIFUSER[$i]} group ${VIRTIFGROUP[$i]} done } # Function to destroy virtual interfaces virtif_destroy() { # argument is 'i' - the position of this interface in the VIRTIFNAME array. for i in $(seq 0 $((${#VIRTIFNAME[@]} - 1))); do info_log "${VIRTIFNAME[$i]}: destroying virtual interface" debug_log "/sbin/ip tuntap del dev ${VIRTIFNAME[$i]} mode ${VIRTIFTYPE[$i]}" /sbin/ip tuntap del dev ${VIRTIFNAME[$i]} mode ${VIRTIFTYPE[$i]} done } # Function to assemble a bridge interface. br_open() { # argument is 'i' - the position of this interface in the IFNAME array. info_log "${IFNAME[$1]}: creating bridge" debug_log "/sbin/ip link add name ${IFNAME[$1]} type bridge" /sbin/ip link add name ${IFNAME[$1]} type bridge for BRIF in ${BRNICS[$1]}; do debug_log "/sbin/ip address flush dev $BRIF" /sbin/ip address flush dev $BRIF debug_log "/sbin/ip link set dev $BRIF master ${IFNAME[$1]}" /sbin/ip link set dev $BRIF master ${IFNAME[$1]} debug_log "/sbin/ip link set dev $BRIF up" /sbin/ip link set dev $BRIF up done while read -r -d \| IFOPT; do if [ -n "$IFOPT" ]; then debug_log "/sbin/ip link set dev ${IFNAME[$1]} type bridge $IFOPT" /sbin/ip link set dev ${IFNAME[$1]} type bridge $IFOPT fi done <<<"${IFOPTS[$1]/%|*([[:blank:]])}|" # The | on the end is required. # Don't bring up the interface if it will be brought up later during IP configuration. # This prevents a situation where SLAAC takes a while to apply if the interface is already up. if [ -z "${IPADDRS[$1]}" ] && [ -z "${IP6ADDRS[$1]}" ] && [ -z "${IPADDR[$1]}" ] && [ "${USE_DHCP[$1]}" != "yes" ] && [ "${USE_DHCP6[$1]}" != "yes" ] && [ "${USE_SLAAC[$1]}" != "yes" ]; then debug_log "/sbin/ip link set dev ${IFNAME[$1]} up" /sbin/ip link set dev ${IFNAME[$1]} up fi } # Function to disassemble a bridge interface. br_close() { # argument is 'i' - the position of this interface in the IFNAME array. info_log "${IFNAME[$1]}: destroying bridge" debug_log "/sbin/ip link set dev ${IFNAME[$1]} down" /sbin/ip link set dev ${IFNAME[$1]} down for BRIF in $(ls --indicator-style=none /sys/class/net/${IFNAME[$1]}/brif/) do debug_log "/sbin/ip link set dev $BRIF nomaster" /sbin/ip link set dev $BRIF nomaster done for BRIF in ${BRNICS[$1]}; do debug_log "/sbin/ip link set dev $BRIF down" /sbin/ip link set dev $BRIF down done debug_log "/sbin/ip link del ${IFNAME[$1]}" /sbin/ip link del ${IFNAME[$1]} } # Function to create a bond. bond_create() { # Argument is 'i' - the position of this interface in the IFNAME array. info_log "${IFNAME[$1]}: creating bond" debug_log "/sbin/ip link add name ${IFNAME[$1]} type bond" /sbin/ip link add name ${IFNAME[$1]} type bond debug_log "/sbin/ip link set dev ${IFNAME[$1]} type bond mode ${BONDMODE[$1]:-balance-rr}" /sbin/ip link set dev ${IFNAME[$1]} type bond mode ${BONDMODE[$1]:-balance-rr} for BONDIF in ${BONDNICS[$1]}; do debug_log "/sbin/ip address flush dev $BONDIF" /sbin/ip address flush dev $BONDIF debug_log "/sbin/ip link set $BONDIF master ${IFNAME[$1]}" /sbin/ip link set $BONDIF master ${IFNAME[$1]} debug_log "/sbin/ip link set dev $BONDIF up" /sbin/ip link set dev $BONDIF up done # This has to be done *after* the interface is brought up because the # 'primary ' option has to occur after the interface is active. while read -r -d \| IFOPT; do if [ -n "$IFOPT" ]; then debug_log "/sbin/ip link set dev ${IFNAME[$1]} type bond $IFOPT" /sbin/ip link set dev ${IFNAME[$1]} type bond $IFOPT fi done <<<"${IFOPTS[$1]/%|*([[:blank:]])}|" # The | on the end is required. } # Function to destroy a bond. bond_destroy() { # Argument is 'i' - the position of this interface in the IFNAME array. info_log "${IFNAME[$1]}: destroying bond" debug_log "/sbin/ip link set dev ${IFNAME[$1]} down" /sbin/ip link set dev ${IFNAME[$1]} down debug_log "/sbin/ip address flush dev ${IFNAME[$1]}" /sbin/ip address flush dev ${IFNAME[$1]} for BONDIF in ${BONDNICS[$1]}; do debug_log "/sbin/ip link set $BONDIF nomaster" /sbin/ip link set $BONDIF nomaster debug_log "/sbin/ip link set dev $BONDIF down" /sbin/ip link set dev $BONDIF down done debug_log "/sbin/ip link del name ${IFNAME[$1]} type bond" /sbin/ip link del name ${IFNAME[$1]} type bond } # Function to bring up a network interface. If the interface is # already up or does not yet exist (perhaps because the kernel driver # is not loaded yet), do nothing. if_up() { # Determine position 'i' of this interface in the IFNAME array: i=0 while [ $i -lt $MAXNICS ]; do [ "${IFNAME[$i]}" = "${1}" ] && break i=$((i+1)) done # If "i" is greater or equal to "MAXNICS" at this point, it means we didn't # find an entry in IFNAME array corresponding to "${1}", which likely means # there are more interfaces configured than MAXNICS. Let's err on the # side of caution and do nothing instead of possibly doing the wrong thing. if [ $i -ge $MAXNICS ]; then info_log "${1}: skipping - you might need to increase MAXNICS" return fi info_log "${1}: configuring interface" # If you need to set hardware addresses for the underlying interfaces in a # bond or bridge, configure the interfaces with IPs of 0.0.0.0 and set the # MAC address with HWADDR. Then, finally, define the bond or bridge. # If the interface is a bond, create it. [ -n "${BONDNICS[$i]}" -a -z "$container" ] && bond_create $i # If the interface is a bridge, create it. [ -n "${BRNICS[$i]}" -a -z "$container" ] && br_open $i if [ -e /sys/class/net/${1%%[:.]*} ]; then # interface exists if ! /sbin/ip address show scope global dev ${1} 2>/dev/null | grep -Ewq '(inet|inet6)' || \ ! /sbin/ip link show dev ${1} | grep -wq "state UP"; then # interface not up or not configured local IF_UP=0 # Initialize any wireless parameters: if [ -x /etc/rc.d/rc.wireless ]; then . /etc/rc.d/rc.wireless ${1} start fi # Handle VLAN interfaces before trying to configure IP addresses. if echo "${1}" | grep -Fq .; then IFACE="${1%.*}" VLAN="${1##*.}" # Check if the underlying interface is already up. if ! /sbin/ip link show dev $IFACE 2>/dev/null| grep -wq "state UP"; then # Bring up the underlying interface. debug_log "/sbin/ip link set dev $IFACE up" if ! /sbin/ip link set dev $IFACE up; then info_log "${1}: failed to bring up interface $IFACE" return fi IF_UP=1 fi # Configure the VLAN interface. info_log "${1}: creating VLAN interface" debug_log "/sbin/ip link add link $IFACE name ${1} type vlan id $VLAN" if ! /sbin/ip link add link $IFACE name ${1} type vlan id $VLAN; then info_log "${1}: failed to create VLAN interface" ((IF_UP == 1)) && /sbin/ip link set dev $IFACE down return fi while read -r -d \| IFOPT; do if [ -n "$IFOPT" ]; then debug_log "/sbin/ip link set dev ${1} type vlan $IFOPT" /sbin/ip link set dev ${1} type vlan $IFOPT fi done <<<"${IFOPTS[$i]/%|*([[:blank:]])}|" # The | on the end is required. elif [ -z "${BONDNICS[$i]}" ] && [ -z "${BRNICS[$i]}" ]; then # Only apply IFOPTS for a physical interface if it's not been handled # by a higher level interface. while read -r -d \| IFOPT; do if [ -n "$IFOPT" ]; then debug_log "/sbin/ip link set dev ${1} $IFOPT" /sbin/ip link set dev ${1} $IFOPT fi done <<<"${IFOPTS[$i]/%|*([[:blank:]])}|" # The | on the end is required. fi # Set hardware address: if [ -n "${HWADDR[$i]}" ]; then debug_log "/sbin/ip link set dev ${1} address ${HWADDR[$i]}" if ! /sbin/ip link set dev ${1} address ${HWADDR[$i]} 2>/dev/null; then info_log "${1}: failed to set hardware address" fi fi if [ -e /proc/sys/net/ipv6 ]; then # ipv6 networking is available # Disable v6 IP auto configuration before trying to bring up the interface: debug_log "${1}: disabling IPv6 autoconf" echo "0" >/proc/sys/net/ipv6/conf/${1}/autoconf if [ "${USE_RA[$i]}" = "yes" ]; then # Unconditionally accept router advertisements on this interface: debug_log "${1}: accepting IPv6 RA" echo "1" >/proc/sys/net/ipv6/conf/${1}/accept_ra else # Disable router advertisments on this interface until SLAAC is enabled: debug_log "${1}: ignoring IPv6 RA" echo "0" >/proc/sys/net/ipv6/conf/${1}/accept_ra fi fi debug_log "/sbin/ip address flush dev ${1}" /sbin/ip address flush dev ${1} IF_UP=0 if [ -e /proc/sys/net/ipv6 ] && [ "${USE_DHCP6[$i]}" != "yes" ] && [ "${USE_SLAAC[$i]}" = "yes" ]; then # configure via SLAAC info_log "${1}: enabling SLAAC" # Enable accepting of RA packets, unless explicitly configured not to: if [ "${USE_RA[$i]}" = "no" ]; then debug_log "${1}: ignoring IPv6 RA" echo "0" >/proc/sys/net/ipv6/conf/${1}/accept_ra else debug_log "${1}: accepting IPv6 RA" echo "1" >/proc/sys/net/ipv6/conf/${1}/accept_ra fi # Set up SLAAC privacy enhancements if configured. if [ "${SLAAC_PRIVIPGEN[$i]}" = "yes" ]; then if [ -n "${SLAAC_SECRET[$i]}" ]; then debug_log "${1}: seeding secret and enabling private IPv6 generation" echo "${SLAAC_SECRET[$i]}" >/proc/sys/net/ipv6/conf/${1}/stable_secret echo "2" >/proc/sys/net/ipv6/conf/${1}/addr_gen_mode else debug_log "${1}: using random secret and enabling private IPv6 generation" echo -n >/proc/sys/net/ipv6/conf/${1}/stable_secret echo "3" >/proc/sys/net/ipv6/conf/${1}/addr_gen_mode fi fi if [ "${SLAAC_TEMPADDR[$i]}" = "yes" ]; then debug_log "${1}: enabling SLAAC tempaddr" echo "2" >/proc/sys/net/ipv6/conf/${1}/use_tempaddr fi # Enable auto configuration of interfaces: echo "1" >/proc/sys/net/ipv6/conf/${1}/autoconf # Bring the interface up: debug_log "/sbin/ip link set dev ${1} up" /sbin/ip link set dev ${1} up echo "${1}: waiting for router announcement" for ((j = ${SLAAC_TIMEOUT[$i]:=15} * 2; j--;)); do # by default, wait a max of 15 seconds for the interface to configure /sbin/ip -6 address show dynamic dev ${1} 2>/dev/null | grep -Ewq 'inet6' && { IF_UP=1; break; } sleep 0.5 done if ((IF_UP != 1)); then echo "${1}: timed out" info_log "${1}: failed to auto configure after ${SLAAC_TIMEOUT[$i]} seconds" debug_log "/sbin/ip address flush dev ${1}" /sbin/ip address flush dev ${1} debug_log "/sbin/ip link set dev ${1} down" /sbin/ip link set dev ${1} down fi fi # Slackware historically favours dynamic configuration over fixed IP to configure interfaces, so keep that tradition: if [ "${USE_DHCP[$i]}" = "yes" ] || { [ -e /proc/sys/net/ipv6 ] && [ "${USE_DHCP6[$i]}" = "yes" ]; }; then # use dhcpcd info_log "${1}: starting dhcpcd" # Declare DHCP_OPTIONS array before adding new options to it: local -a DHCP_OPTIONS=() # Set DHCP_OPTIONS for this interface: if [ -e /proc/sys/net/ipv6 ]; then if [ "${USE_DHCP[$i]}" = "yes" ] && [ "${USE_DHCP6[$i]}" != "yes" ]; then # only try v4 dhcp DHCP_OPTIONS+=("-4") elif [ "${USE_DHCP[$i]}" != "yes" ] && [ "${USE_DHCP6[$i]}" = "yes" ]; then # only try v6 dhcp DHCP_OPTIONS+=("-6") fi else DHCP_OPTIONS+=("-4") fi [ -n "${DHCP_HOSTNAME[$i]}" ] && DHCP_OPTIONS+=("-h" "${DHCP_HOSTNAME[$i]}") [ "${DHCP_KEEPRESOLV[$i]}" = "yes" ] && DHCP_OPTIONS+=("-C" "resolv.conf") [ "${DHCP_KEEPNTP[$i]}" = "yes" ] && DHCP_OPTIONS+=("-C" "ntp.conf") [ "${DHCP_KEEPGW[$i]}" = "yes" ] && DHCP_OPTIONS+=("-G") [ -n "${DHCP_IPADDR[$i]}" ] && DHCP_OPTIONS+=("-r" "${DHCP_IPADDR[$i]}") [ "${DHCP_DEBUG[$i]}" = "yes" ] && DHCP_OPTIONS+=("-d") # The -L option used to be hard coded into the dhcpcd command line in -current. It was added to assist ARM users # get networking up and running. Previous versions of Slackware did not have -L hard coded - the code here keeps # the 14.2 behaviour, but can be altered to make the use of -L default as in -current. To change the behaviour, # alter the test below to be: [ "${DHCP_NOIPV4LL[$i]}" != "no" ]. # Note: ARM users should make use of the DHCP_NOIPV4LL[x]="yes" parameter in rc.inet1.conf - this is the correct # way to get the behaviour they seek. [ "${DHCP_NOIPV4LL[$i]}" = "yes" ] && DHCP_OPTIONS+=("-L") echo "${1}: polling for DHCP server" # 15 seconds should be a reasonable default DHCP timeout. 30 was too much. debug_log "/sbin/dhcpcd -t ${DHCP_TIMEOUT[$i]:-15} ${DHCP_OPTIONS[*]} ${1}" if /sbin/dhcpcd -t "${DHCP_TIMEOUT[$i]:-15}" "${DHCP_OPTIONS[@]}" ${1}; then # Enable accepting of RA packets if explicitly told to: if [ -e /proc/sys/net/ipv6 ] && [ "${USE_RA[$i]}" = "yes" ]; then debug_log "${1}: unconditionally accepting IPv6 RA" echo "1" >/proc/sys/net/ipv6/conf/${1}/accept_ra fi IF_UP=1 else info_log "${1}: failed to obtain DHCP lease" debug_log "/sbin/ip address flush dev ${1}" /sbin/ip address flush dev ${1} debug_log "/sbin/ip link set dev ${1} down" /sbin/ip link set dev ${1} down fi fi if [ -e /proc/sys/net/ipv6 ] && [ -n "${IP6ADDRS[$i]}" ]; then # add v6 IPs info_log "${1}: setting IPv6 addresses" # IPv6's Duplicate Address Detection (DAD) causes a race condition when bringing up interfaces, as # described here: https://www.agwa.name/blog/post/beware_the_ipv6_dad_race_condition # Disable DAD while bringing up the interface - but note that this means the loss of detection of a # duplicate address. It's a trade off, unfortunately. debug_log "${1}: disabling IPv6 DAD" echo "0" >/proc/sys/net/ipv6/conf/${1}/accept_dad for V6IP in ${IP6ADDRS[$i]}; do IP="${V6IP%/*}" PREFIX="${V6IP#*/}" if [ -z "$PREFIX" ] || [ "$IP" == "$PREFIX" ]; then info_log "${1}: no prefix length set for IP $IP - assuming 64" PREFIX="64" fi debug_log "/sbin/ip -6 address add $IP/$PREFIX dev ${1}" if /sbin/ip -6 address add $IP/$PREFIX dev ${1} && /sbin/ip link set dev ${1} up; then # Enable accepting of RA packets if explicitly told to. if [ "${USE_RA[$i]}" = "yes" ]; then debug_log "${1}: unconditionally accepting IPv6 RA" echo "1" >/proc/sys/net/ipv6/conf/${1}/accept_ra fi IF_UP=1 else info_log "${1}: failed to set IP $IP" if ((IF_UP != 1)); then # a v4 address was configured, don't flush it debug_log "/sbin/ip address flush dev ${1}" /sbin/ip address flush dev ${1} debug_log "/sbin/ip link set dev ${1} down" /sbin/ip link set dev ${1} down fi fi done # Reset accept_dad back to default now all the IPs are configured: debug_log "${1}: resetting IPv6 DAD to default" cat /proc/sys/net/ipv6/conf/default/accept_dad >/proc/sys/net/ipv6/conf/${1}/accept_dad fi if [ -n "${IPADDRS[$i]}" ] || [ -n "${IPADDR[$i]}" ]; then # add v4 IPs info_log "${1}: setting IPv4 addresses" # Only use IPADDR if no dynamic configuration was done. if [ "${USE_DHCP[$i]}" == "yes" ] || [ "${USE_DHCP6[$i]}" == "yes" ] || [ "${USE_SLAAC[$i]}" == "yes" ]; then V4IPS="${IPADDRS[$i]}" else V4IPS="${IPADDRS[$i]} ${IPADDR[$i]}${NETMASK[$i]:+/${NETMASK[$i]}}" fi for V4IP in $V4IPS; do IP="${V4IP%/*}" NM="${V4IP#*/}" if [ -z "$NM" ] || [ "$IP" == "$NM" ]; then info_log "${1}: no netmask set for IP $IP - assuming 24 (aka, 255.255.255.0)" NM="24" fi debug_log "/sbin/ip -4 address add $IP/$NM broadcast + dev ${1}" if /sbin/ip -4 address add $IP/$NM broadcast + dev ${1} && /sbin/ip link set dev ${1} up; then IF_UP=1 else info_log "${1}: failed to set IP $IP" if ((IF_UP != 1)); then # if at least one address was configured, don't flush the device debug_log "/sbin/ip address flush dev ${1}" /sbin/ip address flush dev ${1} debug_log "/sbin/ip link set dev ${1} down" /sbin/ip link set dev ${1} down fi fi done fi if ((IF_UP == 1)) && [ -n "${IPALIASES[$i]}" ]; then # Only apply IPALIASES onto an up interface info_log "${1}: setting extra IPv4 addresses" NUM=0 for EXTRAIP in ${IPALIASES[$i]}; do IP="${EXTRAIP%/*}" NM="${EXTRAIP#*/}" if [ -z "$NM" ] || [ "$IP" == "$NM" ]; then info_log "${1}: no netmask set for alias IP $IP - assuming 24 (aka, 255.255.255.0)" NM="24" fi debug_log "/sbin/ip -4 address add $IP/$NM broadcast + dev ${1} label ${1}:$NUM" if /sbin/ip -4 address add $IP/$NM broadcast + dev ${1} label ${1}:$NUM; then NUM=$((NUM + 1)) else info_log "${1}: failed to add alias IP $IP" fi done fi if ((IF_UP == 1)); then # Force an MTU (possibly overriding that set by DHCP or RA): if [ -n "${MTU[$i]}" ]; then info_log "${1}: setting custom MTU" debug_log "/sbin/ip link set dev ${1} mtu ${MTU[$i]}" if ! /sbin/ip link set dev ${1} mtu ${MTU[$i]}; then info_log "${1}: failed to set MTU" fi fi # Set promiscuous mode on the interface: if [ "${PROMISCUOUS[$i]}" = "yes" ]; then info_log "${1}: setting promiscuous mode" debug_log "/sbin/ip link set dev ${1} promisc on" if ! /sbin/ip link set dev ${1} promisc on; then info_log "${1}: failed to set promiscuous mode" fi fi fi else debug_log "${1}: skipping configuration - already up" fi else debug_log "${1}: skipping configuration - does not exist (yet)" fi } # Function to take down a network interface: if_down() { # Determine position 'i' of this interface in the IFNAME array: i=0 while [ $i -lt $MAXNICS ]; do [ "${IFNAME[$i]}" = "${1}" ] && break i=$((i+1)) done if [ $i -ge $MAXNICS ]; then info_log "${1}: skipping - you might need to increase MAXNICS" return fi info_log "${1}: de-configuring interface" if [ -e /sys/class/net/${1} ]; then if [ "${USE_DHCP[$i]}" = "yes" ] || [ "${USE_DHCP6[$i]}" = "yes" ]; then # take down dhcpcd info_log "${1}: stopping dhcpcd" # When using -k, dhcpcd requires some command line options to match those used to invoke it: if [ "${USE_DHCP[$i]}" = "yes" ] && [ "${USE_DHCP6[$i]}" != "yes" ]; then # only v4 dhcp DHCP_OPTIONS=( -4 ) elif [ "${USE_DHCP[$i]}" != "yes" ] && [ "${USE_DHCP6[$i]}" = "yes" ]; then # only v6 dhcp DHCP_OPTIONS=( -6 ) fi debug_log "/sbin/dhcpcd ${DHCP_OPTIONS[*]} -k -d ${1}" /sbin/dhcpcd "${DHCP_OPTIONS[*]}" -k -d ${1} 2>/dev/null || info_log "${1}: failed to stop dhcpcd" fi # Disable v6 IP auto configuration and RA before trying to clear the IP from the interface: if [ -e /proc/sys/net/ipv6 ]; then debug_log "${1}: disabling IPv6 autoconf and RA" echo "0" >/proc/sys/net/ipv6/conf/${1}/autoconf echo "0" >/proc/sys/net/ipv6/conf/${1}/accept_ra fi sleep 0.5 # allow time for DHCP/RA to unconfigure the interface # Flush any remaining IPs: debug_log "/sbin/ip address flush dev ${1}" /sbin/ip address flush dev ${1} # Bring the interface down: debug_log "/sbin/ip link set dev ${1} down" /sbin/ip link set dev ${1} down # Reset everything back to defaults: if [ -e /proc/sys/net/ipv6 ]; then debug_log "${1}: resetting IPv6 configuration to defaults" cat /proc/sys/net/ipv6/conf/default/autoconf >/proc/sys/net/ipv6/conf/${1}/autoconf cat /proc/sys/net/ipv6/conf/default/accept_ra >/proc/sys/net/ipv6/conf/${1}/accept_ra cat /proc/sys/net/ipv6/conf/default/use_tempaddr >/proc/sys/net/ipv6/conf/${1}/use_tempaddr cat /proc/sys/net/ipv6/conf/default/addr_gen_mode >/proc/sys/net/ipv6/conf/${1}/addr_gen_mode echo -n >/proc/sys/net/ipv6/conf/${1}/stable_secret fi # If the interface is a bridge, then destroy it now: [ -n "${BRNICS[$i]}" ] && br_close $i # If the interface is a bond, then destroy it now. [ -n "${BONDNICS[$i]}" ] && bond_destroy $i # Take down VLAN interface, if configured. if echo "${1}" | grep -Fq .; then info_log "${1}: destroying VLAN interface" debug_log "/sbin/ip link set dev ${1} down" /sbin/ip link set dev ${1} down debug_log "/sbin/ip link delete ${1}" /sbin/ip link delete ${1} if ! /sbin/ip address show scope global dev ${1%.*} 2>/dev/null | grep -Ewq '(inet|inet6)'; then debug_log "/sbin/ip link set dev ${1%.*} down" /sbin/ip link set dev ${1%.*} down fi fi # Kill wireless daemons if any: if [ -x /etc/rc.d/rc.wireless ]; then . /etc/rc.d/rc.wireless ${1} stop fi fi } ##################### # GATEWAY FUNCTIONS # ##################### # Function to bring up the gateway if there is not yet a default route: gateway_up() { info_log "Configuring gateways" # Bring up the IPv4 gateway: if [ -n "$GATEWAY" ]; then if ! /sbin/ip -4 route show | grep -wq default; then debug_log "/sbin/ip -4 route add default via ${GATEWAY}" /sbin/ip -4 route add default via ${GATEWAY} fi fi # Bring up the IPv6 gateway: if [ -n "$GATEWAY6" ]; then if ! /sbin/ip -6 route show | grep -wq default; then debug_log "/sbin/ip -6 route add default via ${GATEWAY6}" /sbin/ip -6 route add default via ${GATEWAY6} fi fi } # Function to take down an existing default gateway: gateway_down() { info_log "De-configuring gateways" if /sbin/ip -4 route show | grep -wq default ; then debug_log "/sbin/ip -4 route del default" /sbin/ip -4 route del default fi if /sbin/ip -6 route show | grep -wq default ; then debug_log "/sbin/ip -6 route del default" /sbin/ip -6 route del default fi } # Function to start the network: start() { echo "Starting the network interfaces..." lo_up virtif_create for i in "${IFNAME[@]}" ; do if_up $i done gateway_up } # Function to stop the network: stop() { echo "Stopping the network interfaces..." gateway_down for (( i = MAXNICS - 1; i >= 0; i-- )); do if_down ${IFNAME[$i]} done virtif_destroy lo_down } ############ ### MAIN ### ############ # extglob is required for some functionallity. shopt -s extglob case "${1}" in start|up) # "start" (or "up") brings up all configured interfaces: start ;; stop|down) # "stop" (or "down") takes down all configured interfaces: stop ;; restart) # "restart" restarts the network: stop start ;; lo_start|lo_up) # Start the loopback interface: lo_up ;; lo_stop|lo_down) # Stop the loopback interface: lo_down ;; *_start|*_up) # Example: "eth1_start" (or "eth1_up") will start the specified interface 'eth1' INTERFACE=$(echo ${1} | /bin/cut -d '_' -f 1) if_up $INTERFACE gateway_up ;; *_stop|*_down) # Example: "eth0_stop" (or "eth0_down") will stop the specified interface 'eth0' INTERFACE=$(echo ${1} | /bin/cut -d '_' -f 1) if_down $INTERFACE ;; *_restart) # Example: "wlan0_restart" will take 'wlan0' down and up again INTERFACE=$(echo ${1} | /bin/cut -d '_' -f 1) if_down $INTERFACE sleep 1 if_up $INTERFACE gateway_up ;; *) # The default is to bring up all configured interfaces: start esac # End of /etc/rc.d/rc.inet1