#!/bin/sh
set -e

# dhcpcd client hook to write /run/net*.conf files compatible to ipconfig from klibc-utils

# Ensure that the search domain ends with dots
domain_search_with_trailing_dots() {
	local domain_search=""
	for domain in $1; do
		domain_search="${domain_search}${domain_search:+ }${domain%.}."
	done
	echo "$domain_search"
}

write_dhcp_netinfo() {
	local domain_search netinfo_path="$1"

	domain_search=$(domain_search_with_trailing_dots "${new_domain_search-}")
	cat >"$netinfo_path" << EOF
DEVICE='${interface-}'
PROTO='${protocol-}'
IPV4ADDR='${new_ip_address-}'
IPV4BROADCAST='${new_broadcast_address-}'
IPV4NETMASK='${new_subnet_mask-}'
IPV4GATEWAY='${new_routers-}'
IPV4DNS0='${new_domain_name_servers-}'
HOSTNAME='${new_host_name-}'
DNSDOMAIN='${new_domain_name-}'
ROOTSERVER='${new_routers-}'
filename='${new_filename-}'
DHCPLEASETIME='${new_dhcp_lease_time-}'
DOMAINSEARCH='${domain_search}'
EOF
}

write_dhcp6_netinfo() {
	local domain_search netinfo_path="$1"

	domain_search=$(domain_search_with_trailing_dots "${new_dhcp6_domain_search-}")
	cat >"$netinfo_path" << EOF
DEVICE6='${interface-}'
IPV6PROTO='${protocol-}'
IPV6ADDR='${new_dhcp6_ia_na1_ia_addr1-}'
IPV6NETMASK='128'
IPV6DNS0='${new_dhcp6_name_servers-}'
IPV6DOMAINSEARCH='${domain_search}'
EOF
}

if ${if_configured?}; then
	if ${if_up?}; then
		if [ "${protocol?}" = dhcp ]; then
			write_dhcp_netinfo "/run/net-${interface?}.conf"
		elif [ "${protocol}" = dhcp6 ]; then
			write_dhcp6_netinfo "/run/net6-${interface?}.conf"
		fi
	elif ${if_down?}; then
		if [ "${protocol?}" = dhcp ]; then
			rm -f "/run/net-${interface?}.conf"
		elif [ "${protocol}" = dhcp6 ]; then
			rm -f "/run/net6-${interface?}.conf"
		fi
	fi
fi