r0 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r0, &(0x7f0000000540)={0xa, 0x0, 0x0, @dev, 0x2}, 0x1c)
sendmmsg$inet6(r0, &(0x7f0000003ac0)=[{{&(0x7f0000000040)={0xa, 0x4e24, 0x0, @ipv4={'\x00', '\xff\xff', @multicast1}}, 0x1c, 0x0, 0x0, &(0x7f0000000340)=[@hoplimit={{0x14}}], 0x18}}, {{0x0, 0x0, 0x0, 0x0, &(0x7f0000003a80)=[@dstopts={{0x18}}], 0x18}}], 0x2, 0x824)