r0 = socket$inet6_udp(0xa, 0x2, 0x0)
r1 = dup(r0)
setsockopt$inet6_IPV6_RTHDRDSTOPTS(r1, 0x29, 0x48, &(0x7f0000000100)={0x2c, 0x4, '\x00', [@enc_lim, @generic={0x0, 0x1b, "41fed320e96a5e3c29b4b8015e324d7fae9068e73a90029bfad584"}]}, 0x28)