r0 = socket$inet6_udp(0xa, 0x2, 0x0)
sendmmsg$inet6(r0, &(0x7f0000001180)=[{{&(0x7f0000000000)={0xa, 0x4e22, 0x0, @mcast2}, 0x1c, 0x0}}, {{&(0x7f00000004c0)={0xa, 0x4e21, 0x0, @loopback}, 0x1c, 0x0, 0x0, &(0x7f0000000a40)=[@dontfrag={{0x14, 0x29, 0x3e, 0x4}}], 0x18}}], 0x2, 0x0)