I have implemented ip_unnumbered_dump/ip_unnumbered_details to the vpp-agent, but it seems that the binary api does not work. Vpp was configured with interface with IP address, and another set as unnumbered, for example:

vpp# sh int addr
local0 (dn):
loop0 (up):
unnumbered, use memif1/1
L3 172.125.40.1/24
memif1/1 (up):
L3 172.125.40.1/24
tapcli-0 (up):
L3 192.168.20.3/24
vpp#

I tried to put specific sw_if_idx to the dump request,  as well as 0 which should (according to documentation) return all configured unnumbered interfaces. Neither of it returned any value, with any combination of interface types I tested.

Vat console was not helpful either:

vat# ip_unnumbered_dump
'ip_unnumbered_dump': function not found
vat#

I guess it's not supported there.

vpp# sh ver
vpp v18.07-rc0~361-g3337bd22