r0 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r0, &(0x7f0000000600)={0xa, 0x0, 0x0, @dev, 0x2}, 0x1c)
setsockopt$inet6_mtu(r0, 0x29, 0x17, &(0x7f0000000000)=0x4, 0x4)
sendmmsg$inet6(r0, &(0x7f0000000080)=[{{0x0, 0x0, 0x0}}], 0x1, 0x0)