ddns-scripts: introduce use_network option

This new option is used to prevent issues caused when forcing the network
interface used on GNU Wget and cURL when the interface is IPv6 and the DDNS
provider host is IPv4-only.

An example would be trying to update an IPv6 from HE 6in4 interface to OVH,
which is IPv4-only:
Non-authoritative answer:
dns.eu.ovhapis.com      canonical name = eu.ovhapis.com.
Name:   eu.ovhapis.com
Address: 141.95.186.231

 131133  note : PID '21141' started at 2025-02-21 13:11
 131133       : ddns version  : 2.8.2-52
 131133       : uci configuration:
ddns.router6.dns_server='dns100.ovh.net'
ddns.router6.domain='****domain****'
ddns.router6.enabled='1'
ddns.router6.interface='henet'
ddns.router6.ip_network='henet'
ddns.router6.ip_source='network'
ddns.router6.lookup_host='****lookup_host****'
ddns.router6.password='***PW***'
ddns.router6.service_name='ovh.com'
ddns.router6.use_https='1'
ddns.router6.use_ipv6='1'
ddns.router6.use_syslog='2'
ddns.router6.username='****username****'
ddns.router6=service
 131133       : verbose mode  : 0 - run normal, NO console output
 131133       : check interval: 600 seconds
 131133       : force interval: 259200 seconds
 131133       : retry interval: 60 seconds
 131133       : retry max count : 0 times
 131133       : No old process
 131133       : last update: never
 131133       : Detect registered/public IP
 131133       : #> /usr/bin/drill -V0 -u ****domain**** @dns100.ovh.net AAAA >/var/run/ddns/router6.dat 2>/var/run/ddns/router6.err
 131133       : Registered IP '2600:XXXX:XXXX::XXXX' detected
 131133  info : Starting main loop at 2025-02-21 13:11
 131133       : Detect current IP on 'network'
 131133       : Current IP '2001:XXXX:XXXX:XXXX::XXXX' detected on network 'henet'
 131133       : Update needed - L: '2001:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX' <> R: '2600:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX'
 131133       : Force communication via IP '2001:XXXX:XXXX:XXXX::XXXX'
 131133       : #> /usr/bin/wget --hsts-file=/tmp/.wget-hsts -nv -t 1 -O /var/run/ddns/router6.dat -o /var/run/ddns/router6.err --bind-address=2001:XXXX:XXXX:XXXX::XXXX --no-proxy 'https://***USERNAME***:***PW***@dns.eu.ovhapis.com/nic/update?system=dyndns&hostname=***HOSTNAME***&myip=2001:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX'
 131133 ERROR : GNU Wget Error: '4'
 131133       : failed: Address family not supported by protocol.
 131133  WARN : Transfer failed - retry 1/0 in 60 seconds

Signed-off-by: Álvaro Fernández Rojas <[email protected]>

net/ddns-scripts/Makefile

@@ -8,7 +8,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ddns-scripts
 PKG_VERSION:=2.8.2
-PKG_RELEASE:=64
+PKG_RELEASE:=65
 
 PKG_LICENSE:=GPL-2.0
 

net/ddns-scripts/files/usr/lib/ddns/dynamic_dns_functions.sh

@@ -715,7 +715,7 @@ do_transfer() {
 	[ $# -ne 1 ] && write_log 12 "Error in 'do_transfer()' - wrong number of parameters"
 
 	# Use ip_network as default for bind_network if not separately specified
-	[ -z "$bind_network" ] && [ "$ip_source" = "network" ] && [ "$ip_network" ] && bind_network="$ip_network"
+	[ -z "$bind_network" ] && [ $use_network -ne 0 ] && [ "$ip_source" = "network" ] && [ "$ip_network" ] && bind_network="$ip_network"
 
 	# lets prefer GNU Wget because it does all for us - IPv4/IPv6/HTTPS/PROXY/force IP version
 	if [ -n "$WGET_SSL" ] && [ $USE_CURL -eq 0 ]; then 			# except global option use_curl is set to "1"

net/ddns-scripts/files/usr/lib/ddns/dynamic_dns_updater.sh

@@ -182,6 +182,7 @@ ERR_LAST=$?	# save return code - equal 0 if SECTION_ID found
 # set defaults if not defined
 [ -z "$enabled" ]	  && enabled=0
 [ -z "$retry_max_count" ] && retry_max_count=0	# endless retry
+[ -z "$use_network" ]     && use_network=1	# use network address
 [ -z "$use_syslog" ]      && use_syslog=2	# syslog "Notice"
 [ -z "$use_https" ]       && use_https=0	# not use https
 [ -z "$use_logfile" ]     && use_logfile=1	# use logfile by default

net/ddns-scripts/samples/ddns.config_sample

@@ -145,6 +145,16 @@ config service "myddns"
 	# default: none
 	option param_opt ""
 
+	###########
+	# use network interface when communicating with your DDNS provider.
+	# forcing the network interface causes problems when communicating to DDNS
+	# provider IPv4-only hosts via IPv6-only interaces.
+	# setting this to 0 disables the following arguments:
+	#  GNU Wget: "--bind-address"
+	#  cURL: "--interface"
+	# default: "1"	use network interface
+	option use_network "1"
+
 	###########
 	# use HTTPS for secure communication with you DDNS provider
 	# personally found some providers having problems when not sending