//
//when you choose a item in listview2, a messagebox will appear,to show the reassembled packets' content.
//
private void listView2_Click(object sender, EventArgs e)
{
int index = Convert.ToInt32(this.listView2.SelectedItems[0].Text);
simplePacket pac = (simplePacket)reassemblyPac[index - 1];
MessageBox.Show("id: " + pac.id + " \n" + "source address: " + pac.src + "\n" + "destination address: " + pac.des + "\n" + "length: " + pac.length + "\n" + "reassembly packet payloaddata: \n" + pac.data);
}
//
//reassemble
//show the reassembly packets in the listview2.
//
private void button3_Click_1(object sender, EventArgs e)
{
this.listView2.Items.Clear();
if (this.deviceIsOpen)
{
MessageBox.Show("Please close the capture first!");
}
else
{
foreach (packet p in this.packets)
{
if (p.epac.Type.ToString() == "IpV4")//get all the ip4 packets
{
simplePacket simpac = new simplePacket(p);
if (simpac.df == 0)
{
simpackets.Add(simpac);
}
}
}
foreach (simplePacket sp in this.simpackets)
{
if (sp.offset == 0 && sp.mf == 1)
{ // find the first packet of the same id packets
ArrayList arr = new ArrayList();
simplePacket lastpa = sp;
foreach (simplePacket simp in this.simpackets)
{
if (simp.id == sp.id && simp.src == sp.src && simp.des == sp.des)
{
arr.Add(simp); // get all the packets having the same id.
}
if (simp.id == sp.id && simp.src == sp.src && simp.des == sp.des && simp.mf == 0)
{
lastpa = simp; //gte the last packet.
}
}
int totallength = 0;
foreach (simplePacket s in arr)
{
totallength += s.length;
}
int a = lastpa.length + (lastpa.offset * 8);
if (totallength == a) // test if there is any packet lost.
{
while (sp.length != totallength)
{
foreach (simplePacket pac in arr)
{
if ((pac.offset * 8) == sp.length)
{
sp.length += pac.length;
sp.data += pac.data;
}
}
}
reassemblyPac.Add(sp);
}
}
}
//
//show the information in the treeview.
//
int i = 1;
foreach (simplePacket sp in reassemblyPac)
{
ListViewItem item = new ListViewItem(new string[] { i.ToString(), "IpV4", sp.id, sp.src, sp.des });
listView2.Items.Add(item);
}
}
}