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busybox: sysntpd - Support for NTP servers received via DHCP(v6)

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The busybox ntpd utility currently uses ntp servers specified in uci.
This patch allows the ntpd utility to use NTP servers received via DHCP(v6)
Following uci parameters have been added:
    use_dhcp : enables NTP server config via DHCP(v6)
    dhcp_interface : use NTP servers received only on the specified DHCP(v6) interfaces; if empty all interfaces are considered

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
This commit is contained in:
Hans Dedecker 2016-05-23 14:30:57 +02:00 committed by Jo-Philipp Wich
parent 2ac21bd793
commit 6707d9750a
2 changed files with 54 additions and 7 deletions
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4
package/utils/busybox/Makefile
View file

@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=busybox
PKG_VERSION:=1.24.2
PKG_RELEASE:=1
PKG_RELEASE:=2
PKG_FLAGS:=essential
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
@ -42,7 +42,7 @@ define Package/busybox
MAINTAINER:=Felix Fietkau <nbd@openwrt.org>
TITLE:=Core utilities for embedded Linux
URL:=http://busybox.net/
DEPENDS:=+BUSYBOX_USE_LIBRPC:librpc +BUSYBOX_CONFIG_PAM:libpam
DEPENDS:=+BUSYBOX_USE_LIBRPC:librpc +BUSYBOX_CONFIG_PAM:libpam +BUSYBOX_CONFIG_NTPD:jsonfilter
MENU:=1
endef

57
package/utils/busybox/files/sysntpd
View file

@ -7,13 +7,34 @@ USE_PROCD=1
PROG=/usr/sbin/ntpd
HOTPLUG_SCRIPT=/usr/sbin/ntpd-hotplug
get_dhcp_ntp_servers() {
local interfaces="$1"
local filter="*"
local interface ntpservers ntpserver
for interface in $interfaces; do
[ "$filter" = "*" ] && filter="@.interface='$interface'" || filter="$filter,@.interface='$interface'"
done
ntpservers=$(ubus call network.interface dump | jsonfilter -e "@.interface[$filter]['data']['ntpserver']")
for ntpserver in $ntpservers; do
local duplicate=0
local entry
for entry in $server; do
[ "$ntpserver" = "$entry" ] && duplicate=1
done
[ "$duplicate" = 0 ] && server="$server $ntpserver"
done
}
validate_ntp_section() {
uci_validate_section system timeserver "${1}" \
'server:list(host)' 'enabled:bool:1' 'enable_server:bool:0'
'server:list(host)' 'enabled:bool:1' 'enable_server:bool:0' 'use_dhcp:bool:1' 'dhcp_interface:list(string)'
}
start_service() {
local server enabled enable_server peer
local server enabled enable_server use_dhcp dhcp_interface peer
validate_ntp_section ntp || {
echo "validation failed"
@ -22,6 +43,8 @@ start_service() {
[ $enabled = 0 ] && return
[ $use_dhcp = 1 ] && get_dhcp_ntp_servers "$dhcp_interface"
[ -z "$server" ] && return
procd_open_instance
@ -35,8 +58,32 @@ start_service() {
procd_close_instance
}
service_triggers()
{
procd_add_reload_trigger "system"
service_triggers() {
local script name use_dhcp
script=$(readlink -f "$initscript")
name=$(basename ${script:-$initscript})
procd_open_trigger
procd_add_config_trigger "config.change" "system" /etc/init.d/$name reload
config_load system
config_get use_dhcp ntp use_dhcp 1
[ $use_dhcp = 1 ] && {
local dhcp_interface
config_get dhcp_interface ntp dhcp_interface
if [ -n "$dhcp_interface" ]; then
for n in $dhcp_interface; do
procd_add_interface_trigger "interface.*" $n /etc/init.d/$name reload
done
else
procd_add_raw_trigger "interface.*" 1000 /etc/init.d/$name reload
fi
}
procd_close_trigger
procd_add_validation validate_ntp_section
}