diff options
Diffstat (limited to 'src/lib/ip')
| -rw-r--r-- | src/lib/ip | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/src/lib/ip b/src/lib/ip new file mode 100644 index 0000000..02d99f4 --- /dev/null +++ b/src/lib/ip @@ -0,0 +1,215 @@ +## /usr/lib/network/globals needs to be sourced before this file + + +## Add resolv.conf entries for an interface +# $1: interface name +# $2...: entries, one line per variable +resolvconf_add() { + local interface="$1" + shift + printf "%s\n" "$@" | resolvconf -a "$interface" +} + + +## Set up an IP configuration +# $Interface: interface name +# $IP: type of IPv4 configuration +# $IP6: type of IPv6 configuration +ip_set() { + local addr line route interface_sysctl=${Interface/.//} + + if [[ -z $IP && -z $IP6 ]]; then + report_error "Neither IP, nor IP6 was specified" + return 1 + fi + + case $IP in + dhcp) + case ${DHCPClient:-dhcpcd} in + dhcpcd) + rm -f "/run/dhcpcd-$Interface".{pid,cache} + # If using own dns, tell dhcpcd to NOT replace resolv.conf + [[ $DNS ]] && DhcpcdOptions+=" -C resolv.conf" + do_debug dhcpcd -qL -t "${TimeoutDHCP:-10}" $DHCPOptions "$Interface" 2>&1 | report_debug "$(cat)" + # The first array value of PIPESTATUS is the exit status of dhcpcd + if (( PIPESTATUS != 0 )); then + report_error "DHCP IP lease attempt failed on interface '$Interface'" + return 1 + fi + ;; + dhclient) + rm -f "/run/dhclient-${Interface}.pid" + if ! do_debug dhclient -q -e "TIMEOUT=${TimeoutDHCP:-10}" -pf "/run/dhclient-$Interface.pid" $DhclientOptions "$Interface"; then + report_error "DHCP IP lease attempt failed on interface '$Interface'" + return 1 + fi + ;; + *) + report_error "Unsupported DHCP client: '$DHCPClient'" + return 1 + ;; + esac + ;; + static) + if [[ $Address ]]; then + for addr in "${Address[@]}"; do + [[ $addr == */* ]] || addr+="/24" + if ! do_debug ip addr add "$addr" brd + dev "$Interface"; then + report_error "Could not add address '$addr' to interface '$Interface'" + return 1 + fi + done + fi + if [[ $Gateway ]]; then + if ! do_debug ip route add default via "$Gateway" dev "$Interface"; then + report_error "Could not set gateway '$Gateway' on interface '$Interface'" + return 1 + fi + fi + ;; + ""|no) + ;; + *) + report_error "IP must be either 'dhcp', 'static' or 'no'" + return 1 + ;; + esac + + # Add static IP routes + if [[ $IP && $Routes ]]; then + for route in "${Routes[@]}"; do + if ! do_debug ip route add $route dev "$Interface"; then + report_error "Could not add route '$route' to interface '$Interface'" + return 1 + fi + done + fi + + # Load ipv6 module if necessary + case "$IP6" in + dhcp*|stateless|static) + [[ -d "/proc/sys/net/ipv6" ]] || modprobe ipv6 + ;; + no) + [[ -d "/proc/sys/net/ipv6" ]] && sysctl -q -w "net.ipv6.conf.$interface_sysctl.accept_ra=0" + ;; + "") # undefined IP6 does not prevent RA's from being received -> nop + ;; + *) + report_error "IP6 must be 'dhcp', 'dhcp-noaddr', 'stateless', 'static' or 'no'" + return 1 + ;; + esac + + case "$IP6" in + dhcp*) + if ! type dhclient &>/dev/null; then + report_error "You need to install dhclient to use DHCPv6" + return 1 + fi + sysctl -q -w "net.ipv6.conf.$interface_sysctl.accept_ra=1" + [[ $IP6 == "dhcp-noaddr" ]] && Dhclient6Options+=" -S" + rm -f "/run/dhclient6-${Interface}.pid" + if ! do_debug dhclient -6 -q -e "TIMEOUT=${TimeoutDHCP:-10}" -pf "$Pidfile" $Dhclient6Options "$Interface"; then + report_error "DHCPv6 IP lease attempt failed on interface '$Interface'" + return 1 + fi + ;; + stateless) + sysctl -q -w "net.ipv6.conf.$interface_sysctl.accept_ra=1" + ;; + static) + sysctl -q -w "net.ipv6.conf.$interface_sysctl.accept_ra=0" + if [[ -n $Address6 ]]; then + for addr in "${Address6[@]}"; do + if ! do_debug ip -6 addr add $addr dev "$Interface"; then + report_error "Could not add address '$addr' to interface '$Interface'" + fi + done + fi + ;; + esac + + if [[ $IP6 ]]; then + # Wait for Duplicate Address Detection to finish + if ! timeout_wait "${TimeoutDAD:-3}" '[[ -z "$(ip -6 addr show dev "$Interface" tentative)" ]]'; then + report_error "Duplicate Address Detection is taking too long on interface '$Interface'" + return 1 + fi + + # Add static IPv6 routes + if [[ $Routes6 ]]; then + for route in "${Routes6[@]}"; do + if ! do_debug ip -6 route add $route dev "$Interface"; then + report_error "Could not add route '$route' to interface '$Interface'" + return 1 + fi + done + fi + + # Set a custom gateway after DAD has finished + if [[ $IP6 == "static" && $Gateway6 ]]; then + if ! do_debug ip -6 route replace default via "$Gateway6" dev "$Interface"; then + report_error "Could not set gateway '$Gateway6' on interface '$Interface'" + return 1 + fi + fi + fi + + if [[ $IPCustom ]]; then + for line in "${IPCustom[@]}"; do + if ! do_debug ip $line; then + report_error "Could not configure interface ($line)" + return 1 + fi + done + fi + + if [[ $Hostname ]]; then + if ! do_debug hostnamectl set-hostname "$Hostname"; then + report_error "Cannot set the hostname to '$Hostname'" + return 1 + fi + fi + + if [[ $DNS ]]; then + resolvconf_add "$Interface" \ + "${DNSDomain/#/domain }" \ + "${DNSSearch/#/search }" \ + "${DNS[@]/#/nameserver }" \ + "${DNSOptions[@]/#/options }" + fi +} + + +## Clean up the dynamic part of an IP configuration +# $Interface: interface name +# $IP: type of IPv4 configuration +# $IP6: type of IPv6 configuration +ip_unset() { + if [[ "$IP" == "dhcp" ]]; then + case $DHCPClient in + dhcpcd) + if [[ -f "/run/dhcpcd-$Interface.pid" ]]; then + do_debug dhcpcd -qk "$Interface" >/dev/null + fi + ;; + dhclient) + if [[ -f "/run/dhclient-$Interface.pid" ]]; then + # Alternatively, use -r instead of -x to also release the lease + do_debug dhclient -q -x "$Interface" -pf "/run/dhclient-$Interface.pid" >/dev/null + fi + ;; + esac + fi + if [[ "$IP6" == dhcp* ]]; then + if [[ -f "/run/dhclient6-$Interface.pid" ]]; then + do_debug dhclient -6 -q -x "$Interface" -pf "/run/dhclient6-$Interface.pid" >/dev/null + fi + fi + + [[ $DNS ]] && resolvconf -d "$Interface" +} + + +# vim: ft=sh ts=4 et sw=4: |