Wireshark-bugs: [Wireshark-bugs] [Bug 10452] Support for Android Debug Bridge (ADB) payloads ove
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Mon, 29 Sep 2014 11:04:38 +0000

Comment # 3 on bug 10452 from 
I hope ADB dissector will be ready in next month (October). I have some task to
do in it before release it. But there is a problem... In your capture file I
see that your device specify different endpoints for ADB channel over USB.

INTERFACE DESCRIPTOR (1.0): class Vendor Specific
    bLength: 9
    bDescriptorType: 0x04 (INTERFACE)
    bInterfaceNumber: 1
    bAlternateSetting: 0
    bNumEndpoints: 2
    bInterfaceClass: Vendor Specific (0xff)
    bInterfaceSubClass: 0x42
    bInterfaceProtocol: 0x01
    iInterface: 0
ENDPOINT DESCRIPTOR
    bLength: 7
    bDescriptorType: 0x05 (ENDPOINT)
    bEndpointAddress: 0x85  IN  Endpoint:5
        1... .... = Direction: IN Endpoint
        .... 0101 = Endpoint Number: 0x05
    bmAttributes: 0x02
        .... ..10 = Transfertype: Bulk-Transfer (0x02)
        .... 00.. = Synchronisationtype: No Sync (0x00)
        ..00 .... = Behaviourtype: Data-Endpoint (0x00)
    wMaxPacketSize: 512
        .... ..10 0000 0000 = Maximum Packet Size: 512
    bInterval: 0
ENDPOINT DESCRIPTOR
    bLength: 7
    bDescriptorType: 0x05 (ENDPOINT)
    bEndpointAddress: 0x04  OUT  Endpoint:4
        0... .... = Direction: OUT Endpoint
        .... 0100 = Endpoint Number: 0x04
    bmAttributes: 0x02
        .... ..10 = Transfertype: Bulk-Transfer (0x02)
        .... 00.. = Synchronisationtype: No Sync (0x00)
        ..00 .... = Behaviourtype: Data-Endpoint (0x00)
    wMaxPacketSize: 512
        .... ..10 0000 0000 = Maximum Packet Size: 512
    bInterval: 0


In other devices I see only one endpoint for both direction. The problem is
currently Wireshark does not know about interfaces configuration, so ADB
dissector do not know that these two endpoints are pair for ADB.

I guess that this should be fixed by extend "DecodeAs" for interfaces and
endpoints+direction (two separate things: DecodeBy interfaces; DecodeBy
endpoint+direction). There is a need to spend more time on it, but I hope I can
release ADB dissector with this "small" issue (USB issue = new feature).

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