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## /usr/lib/network/globals needs to be sourced before this file
## Interface a DHCP client
# $1: DHCP client
# $2: command
# $3...: additional arguments
dhcp_call() {
local client="$1" command="$2"
shift 2
if [[ ! -r "$SUBR_DIR/dhcp/$client" ]]; then
report_error "DHCP client '$client' is unsupported"
return 127
fi
if ! source "$SUBR_DIR/dhcp/$client"; then
report_error "DHCP client '$client' is not installed or not ready"
return 127
fi
"${client}_$command" "$@"
}
## Add resolv.conf entries for an interface
# $1: interface name
# $2...: entries, one line per variable
resolvconf_add() {
local interface="$1"
shift
printf "%s\n" "$@" | do_readable 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 $IP6 ]]; then
report_error "Neither IP, nor IP6 was specified"
return 1
fi
# Load ipv6 module if necessary
case "$IP6" in
dhcp*|stateless|static)
[[ -d "/proc/sys/net/ipv6" ]] || modprobe ipv6
[[ $IP6 == "static" ]]
sysctl -q -w "net.ipv6.conf.$interface_sysctl.accept_ra=$?"
;;
no)
[[ -d "/proc/sys/net/ipv6" ]] && sysctl -q -w "net.ipv6.conf.$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 $IP in
dhcp)
dhcp_call "${DHCPClient:-dhcpcd}" start 4 || return
;;
static)
for addr in "${Address[@]}"; do
if ! do_debug ip addr add "$addr" brd + dev "$Interface"; then
report_error "Could not add address '$addr' to interface '$Interface'"
return 1
fi
done
;;
""|no)
;;
*)
report_error "IP must be either 'dhcp', 'static' or 'no'"
return 1
;;
esac
if [[ $IP ]]; then
# Add static IP routes
for route in "${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
# Set a custom gateway after static routes are added
if [[ $IP == "static" && $Gateway ]]; then
if ! do_debug ip route add default via "$Gateway" dev "$Interface"; then
report_error "Could not set gateway '$Gateway' on interface '$Interface'"
return 1
fi
fi
fi
case "$IP6" in
dhcp|dhcp-noaddr)
dhcp_call "${DHCP6Client:-dhclient}" start 6 ${IP6:5} || return
;;
stateless|static)
for addr in "${Address6[@]}"; do
if ! do_debug ip -6 addr add $addr $(is_yes "${SkipDAD:-no}" && printf nodad) dev "$Interface"; then
report_error "Could not add address '$addr' to interface '$Interface'"
fi
done
;;
esac
if [[ $IP6 ]]; then
if ! is_yes "${SkipDAD:-no}"; 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
fi
# Add static IPv6 routes after DAD has finished
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
# Set a custom gateway after static routes are added
if [[ $IP6 == @(stateless|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 '$Interface'"
return 1
fi
fi
fi
for line in "${IPCustom[@]}"; do
if ! do_debug ip $line; then
report_error "Could not configure interface ($line)"
return 1
fi
done
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 IP configuration
# $Interface: interface name
# $IP: type of IPv4 configuration
# $IP6: type of IPv6 configuration
ip_unset() {
[[ $IP == "dhcp" ]] && dhcp_call "${DHCPClient:-dhcpcd}" stop 4
[[ $IP6 == dhcp* ]] && dhcp_call "${DHCP6Client:-dhclient}" stop 6
[[ $DNS ]] && resolvconf -d "$Interface"
ip route flush dev "$Interface" &>/dev/null
ip -6 route flush dev "$Interface" &>/dev/null
ip addr flush dev "$Interface" scope host &>/dev/null
ip addr flush dev "$Interface" scope site &>/dev/null
ip addr flush dev "$Interface" scope global &>/dev/null
}
# vim: ft=sh ts=4 et sw=4:
|
