r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
r1 = socket$inet6_tcp(0xa, 0x1, 0x0)
r2 = dup3(r1, r0, 0x0)
setsockopt$inet6_int(r2, 0x29, 0x4c, &(0x7f0000000040), 0x4)