r0 = socket$inet6_udp(0xa, 0x2, 0x0)
sendmmsg$inet6(r0, &(0x7f0000001d40)=[{{&(0x7f0000000040)={0xa, 0x4e23, 0x0, @dev}, 0x1b, 0x0}}, {{&(0x7f0000000280)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @dev}}, 0x1c, 0x0}}], 0x2, 0x0)