socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000080)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
r1 = fcntl$dupfd(r0, 0x0, r0)
setsockopt$WPAN_WANTACK(r1, 0x0, 0x0, 0x0, 0x0)