root@fic-gta01:/etc/udhcpc.d$ udhcpc -i bnep0
udhcpc (v1.2.1) started
FATAL: couldn't listen on socket, Address family not supported by protocol


root@fic-gta01:/etc/udhcpc.d$ strace udhcpc -i bnep0 2>&1 | tail -n 7
socket(PF_PACKET, SOCK_DGRAM, 8)        = -1 EAFNOSUPPORT (Address family not supported by protocol)
write(1, "FATAL: couldn\'t listen on socket"..., 75FATAL: couldn't listen on socket, Address family not supported by protocol) = 75
time(NULL)                              = 590
send(3, "<131>Jan  1 00:09:50 udhcpc[1285"..., 109, MSG_NOSIGNAL) = 109
io_submit(0, 0, 0xfbad2088 <unfinished ... exit status 0>
Process 1285 detached