r0 = socket$inet(0x2, 0x3, 0xff)
sendmsg$inet(r0, &(0x7f0000000240)={&(0x7f00000000c0)={0x2, 0x0, @multicast1}, 0x10, 0x0, 0x0, &(0x7f0000000200)=[@ip_pktinfo={{0x1c, 0x0, 0x7, {0x0, @dev, @multicast1}}}], 0x20}, 0x0)