alloc_lopacket
packet1 = alloc_lopacket(addr, 16);
packet2 = alloc_lopacket(addr, 16);
packet3 = alloc_lopacket(addr, 16);
packet4 = alloc_lopacket(addr, 32);
packet1 = alloc_lopacket(addr, 0);
packet2 = alloc_lopacket(addr, 0);
packet1 = alloc_lopacket(addr, 16);
packet2 = alloc_lopacket(addr, 16);