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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-09 12:48:01 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-09 12:48:01 +0000 |
commit | b2d2d555a704148968cb7e566735a2a1b1a2f189 (patch) | |
tree | 18549ff498338f40ecf7aa327620abf4c1c3ee43 /examples/chrony.nm-dispatcher.dhcp | |
parent | Initial commit. (diff) | |
download | chrony-b2d2d555a704148968cb7e566735a2a1b1a2f189.tar.xz chrony-b2d2d555a704148968cb7e566735a2a1b1a2f189.zip |
Adding upstream version 4.5.upstream/4.5
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'examples/chrony.nm-dispatcher.dhcp')
-rw-r--r-- | examples/chrony.nm-dispatcher.dhcp | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/examples/chrony.nm-dispatcher.dhcp b/examples/chrony.nm-dispatcher.dhcp new file mode 100644 index 0000000..547ce83 --- /dev/null +++ b/examples/chrony.nm-dispatcher.dhcp @@ -0,0 +1,49 @@ +#!/bin/sh +# This is a NetworkManager dispatcher script for chronyd to update +# its NTP sources with servers from DHCP options passed by NetworkManager +# in the DHCP4_NTP_SERVERS and DHCP6_DHCP6_NTP_SERVERS environment variables. + +export LC_ALL=C + +interface=$1 +action=$2 + +chronyc=/usr/bin/chronyc +server_options=iburst +server_dir=/var/run/chrony-dhcp + +dhcp_server_file=$server_dir/$interface.sources +dhcp_ntp_servers="$DHCP4_NTP_SERVERS $DHCP6_DHCP6_NTP_SERVERS" + +add_servers_from_dhcp() { + rm -f "$dhcp_server_file" + for server in $dhcp_ntp_servers; do + # Check for invalid characters (from the DHCPv6 NTP FQDN suboption) + len1=$(printf '%s' "$server" | wc -c) + len2=$(printf '%s' "$server" | tr -d -c 'A-Za-z0-9:.-' | wc -c) + if [ "$len1" -ne "$len2" ] || [ "$len2" -lt 1 ] || [ "$len2" -gt 255 ]; then + continue + fi + + printf 'server %s %s\n' "$server" "$server_options" >> "$dhcp_server_file" + done + $chronyc reload sources > /dev/null 2>&1 || : +} + +clear_servers_from_dhcp() { + if [ -f "$dhcp_server_file" ]; then + rm -f "$dhcp_server_file" + $chronyc reload sources > /dev/null 2>&1 || : + fi +} + +mkdir -p $server_dir + +case "$action" in + up|dhcp4-change|dhcp6-change) + add_servers_from_dhcp;; + down) + clear_servers_from_dhcp;; +esac + +exit 0 |