I have configure my wlan0 iface as following where mode is ADHOC and WDS is enabled:
config wifi-device 'radio0'
option type 'mac80211'
option channel '36'
option hwmode '11a'
option path 'pci0000:01/0000:01:00.0'
option htmode 'HT20'
option disabled '0'
config wifi-iface 'default_radio0'
option device 'radio0'
option network 'br-int'
option mode 'adhoc'
option ssid 'hossainmesh'
option encryption 'none'
option macaddr 'a4:2b:b0:dd:fd:ca'
option wds '1'
config wifi-device 'radio1'
option type 'mac80211'
option channel '11'
option hwmode '11g'
option path 'platform/qca955x_wmac'
option htmode 'HT20'
option disabled '0'
config wifi-iface 'default_radio1'
option device 'radio1'
option network 'br-int'
option mode 'ap'
option ssid 'hossain_Node_4'
option encryption 'none'
option macaddr 'a4:2b:b0:dd:fd:ca'
option wds '1'
But I think the "4 address frame" still not active between two routers. Is it correct to enable WDS along with ADHOC mode? Also along with AP mode?