Sending packets without a network connection (wireless adapter)

Question

I need to send packets with a wifi adapter to another computer without connecting to any network oriented to Windows 7 and above. First of all, ad-hoc (as I understand it) does not meet my needs, because this requires a connection.

I had two ideas:

• Create something like a broadcast packet that identifies networks. It can be used on a wireless card.

• send a fake but valid packet and which does not need a specific IP / MAC address (for example, they can be broadcast).

What I use: C # with a Win7 computer and a Win7 laptop to test the program. SharpPcap to send packets. Wireshark to check if they are arriving.

I tried the second method:

static void Main(string[] args)
{
    WinPcapDeviceList devs = WinPcapDeviceList.Instance;
    foreach (WinPcapDevice wdev in devs)
    {
        System.Console.Write("Device: ");
        System.Console.WriteLine(wdev.Description);
        foreach (var addr in wdev.Addresses)
            System.Console.WriteLine(addr.Addr);
        System.Console.WriteLine("--------------");
    }

    System.Console.Write("Select device: #");
    int selected = int.Parse(System.Console.ReadLine());
    var dev = devs[selected]; //yes, no checking for oob...
    dev.Open();

    while (true)
    {
        byte[] physBroad = new byte[] { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
        EthernetPacket etherPacket = new EthernetPacket(
            dev.MacAddress,
            new PhysicalAddress(physBroad),
            EthernetPacketType.IpV4);

        IPv4Packet ip4Packet = new IPv4Packet(
            new IPAddress(0),
            IPAddress.Broadcast);

        ip4Packet.Protocol = IPProtocolType.UDP;

        etherPacket.PayloadPacket = ip4Packet;

        UdpPacket udpPacket = new UdpPacket(
            80, //tried with different port setups
            80);

        udpPacket.PayloadData = Encoding.UTF8.GetBytes("test packet");
        ip4Packet.PayloadPacket = udpPacket;

        dev.SendPacket(etherPacket);
    }
}

( Wireshark). , .

, IEEE 802.11, , . , AirPcap? , .

: Edimax Wireless LAN , Mediatek MT763E 802.11bgn Wifi . Wireshark , IEEE-802.11, Ethernet DOCSIS.

Answer 1

SSID WiFi : -)

: