pfSense

Marcos M wrote in #note-1:

Try this patch (apply with the system patches package): {{collapse
[...]
}}

Just tried it, didn't work
I made a patch on github which did the job
https://github.com/pfsense/pfsense/pull/4659

but thanks for your answer, appreciate that

I'm not able to replicate this on 23.09 (should be the same as 2.7.1 for this issue). Regardless of whether the ULA comes before or after the GUA, the function returns the GUA:

# ifconfig output
vmx0: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500
    description: WAN
    options=4e100bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,VLAN_HWFILTER,RXCSUM_IPV6,TXCSUM_IPV6,HWSTATS,MEXTPG>
    ether 00:50:56:b2:23:2f
    inet 10.0.5.235 netmask 0xffffff00 broadcast 10.0.5.255
    inet6 fe80::250:56ff:feb2:232f%vmx0 prefixlen 64 scopeid 0x1
    inet6 fc00::250:56ff:feb2:232f prefixlen 128
    inet6 2001:db8:db8:db8:db8:a85f:46ef:e240 prefixlen 128 pltime 4500 vltime 7200
    media: Ethernet autoselect
    status: active
    nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>

# php function output
var_dump(get_interface_track6ip('wan'));
array(2) {
  [0]=>
  string(32) "2001:db8:db8:db8:db8:a85f:46ef:e240" 
  [1]=>
  string(3) "128" 
}

What pfSense version are you running, and what is the output for the above (test under Diagnostics > Command Prompt)?

I rolled back my change to get_interface_track6ip to show you what it returns with the original code

# ifconfig output
bridge0: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500
    description: LAN
    options=0
    ether 58:9c:fc:10:97:0f
    inet 192.168.1.1 netmask 0xffffff00 broadcast 192.168.1.255
    inet6 fe80::5a9c:fcff:fe10:970f%bridge0 prefixlen 64 scopeid 0x13
    inet6 fe80::1:1%bridge0 prefixlen 64 scopeid 0x13
    inet6 fc00:: prefixlen 64
    inet6 2a01:cb08:e53:1300:5a9c:fcff:fe10:970f prefixlen 64
    inet6 fd00:: prefixlen 64
    id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
    maxage 20 holdcnt 6 proto rstp maxaddr 2000 timeout 1200
    root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
    member: ix3 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
            ifmaxaddr 0 port 8 priority 128 path cost 200000
    member: igc3 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
            ifmaxaddr 0 port 4 priority 128 path cost 55
    member: igc2 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
            ifmaxaddr 0 port 3 priority 128 path cost 2000000
    member: igc1 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
            ifmaxaddr 0 port 2 priority 128 path cost 55
    member: igc0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
            ifmaxaddr 0 port 1 priority 128 path cost 55
    member: ix1 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
            ifmaxaddr 0 port 6 priority 128 path cost 2000
    member: ix2 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
            ifmaxaddr 0 port 7 priority 128 path cost 2000
    groups: bridge
    nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>

# php output (wan has no ipv6 assigned, only lan has)
var_dump(get_interface_track6ip('lan'));
array(2) {
  [0]=>
  string(6) "fc00::" 
  [1]=>
  string(2) "64" 
}

It works !
get_interface_track6ip now returns the GUA as expected, and radvd config file is correct
Thank you