Weird bug in DDNS script

[daiaji]

I'm using PPPOE to dial up and using cloudflare, ddns basically doesn't work for me.

cat /etc/config/ddns 

config ddns 'global'
        option ddns_dateformat '%F %R'
        option ddns_loglines '250'
        option ddns_rundir '/var/run/ddns'
        option ddns_logdir '/var/log/ddns'
        option use_curl '1'

config service 'myddns_ipv4'
        option enabled '1'
        option use_ipv6 '0'
        option service_name 'cloudflare.com-v4'
        option lookup_host 't.test.xyz'
        option domain 't@test.xyz'
        option username 'test@test.com'
        option password '544545454545454545454545'
        option use_https '1'
        option cacert '/etc/ssl/certs'
        option ip_source 'interface'
        option ip_interface 'pppoe-wan'
        option interface 'pppoe-wan'
        option use_syslog '2'
        option retry_unit 'seconds'
        option check_interval '5'
        option check_unit 'minutes'
        option force_interval '1'
        option force_unit 'days'
        option retry_count '0'

cat /etc/hotplug.d/iface/95-ddns 
#!/bin/sh

# there are other ACTIONs like ifupdate we don't need
case "$ACTION" in
        ifup)                                   # OpenWrt is giving a network not phys. Interface
                /etc/init.d/ddns enabled && /usr/lib/ddns/dynamic_dns_updater.sh -n "$INTERFACE" -- start
                ;;
        ifdown)
                /usr/lib/ddns/dynamic_dns_updater.sh -n "$INTERFACE" -- stop
                ;;
esac

The method recommended by Mr. Stragies was used.

How to setup hotplug to do dynamic DNS

So, if you want to script this from the ground up, why not just drop a script into /etc/hotplug.d/iface/ with content like this: /usr/bin/env > /tmp/envs_${INTERFACE}_${DEVICE}_${ACTION}.log Then you see, which variables you get, and can write a script to react accordingly

cat /etc/hotplug.d/iface/98-test 
#!/bin/sh

# there are other ACTIONs like ifupdate we don't need
case "$ACTION" in
        ifup)                                   # OpenWrt is giving a network not phys. Interface
                /usr/bin/env > /tmp/envs_${INTERFACE}_${DEVICE}_${ACTION}.log 
                ;;
        ifdown)
                /usr/bin/env > /tmp/envs_${INTERFACE}_${DEVICE}_${ACTION}.log
                ;;
esac

Then I went to plug and unplug the network cable.

ls /tmp | grep "envs"
envs_lan_br-lan_ifup.log
envs_loopback_lo_ifup.log
envs_wan_6_pppoe-wan_ifup.log
envs_wan_pppoe-wan_ifup.log

When I encountered this bug a year ago, I solved my problem by modifying the plug-in script and changing the variable INTERFACE to pppoe-wan.

But now it seems I should modify the DDNS hotplug script to something like the following.

cat /etc/hotplug.d/iface/95-ddns 

#!/bin/sh

# there are other ACTIONs like ifupdate we don't need
case "$ACTION" in
        ifup)                                   # OpenWrt is giving a network not phys. Interface
                /etc/init.d/ddns enabled && /usr/lib/ddns/dynamic_dns_updater.sh -n "$DEVICE" -- start
                ;;
        ifdown)
                /usr/lib/ddns/dynamic_dns_updater.sh -n "$DEVICE" -- stop
                ;;
esac

At least now the ddns script works for me.

PS: Why is this bug not found? Could it be that cloudflare.com-v4 is deprecated?

[daiaji]

The fault is not resolved, but the following configuration seems to work.

        option ip_source 'network'
        option ip_network 'wan'

At least now I don't have to modify the hotplug script.