Return-Path: MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----_=_NextPart_001_01C64659.5352ACC0" Subject: RE: [Bluez-users] ISSC USB dongle can't ping with size 1000 Message-ID: From: "Al" To: Sender: bluez-users-admin@lists.sourceforge.net Errors-To: bluez-users-admin@lists.sourceforge.net Reply-To: bluez-users@lists.sourceforge.net List-Unsubscribe: , List-Id: BlueZ users List-Post: List-Help: List-Subscribe: , List-Archive: Date: Mon, 13 Mar 2006 12:48:09 +0800 This is a multi-part message in MIME format. ------_=_NextPart_001_01C64659.5352ACC0 Content-Type: text/plain; charset="big5" Content-Transfer-Encoding: quoted-printable Hi, Marcel: =20 There is no default size and packet number assigned to ISSC chip if no HCI_Host_Buffer_Size command is sent from Host. It sends whatever the size it receives to host. But it has problem to=20 send the packets with size more than 970 bytes from my current observation. =20 BRs, =20 Al -----Original Message-----=20 From: bluez-users-admin@lists.sourceforge.net =A5N=B2z Marcel Holtmann=20 Sent: 2006/3/9 [=ACP=B4=C1=A5|] =A4U=A4=C8 09:49=20 To: bluez-users@lists.sourceforge.net=20 Cc:=20 Subject: RE: [Bluez-users] ISSC USB dongle can't ping with size 1000 =09 =09 Hi Al, =09 > I think the problem may not be the buffer size (678) that ISSC = device > has. When I ping with size 1400 bytes, hcidump shows host breaks 1400 = bytes > into serveal 678 byte packets and sends them to device. Both ping = request and ping reply from the other side can be captured in air. > > Most likely the problem is occured when ISSC device trys to send > packets with large size to host. From the hcidump, I observe that if = devices > like CSR receiving packets with size 1400, it breaks 1400 into = serveral 300 (something) packets and sends to host. On the other hand, = when ISSC device receives packet with size 900, it sends 900 byte packet = to host without breaking. But when the size is more than 1000, hcidump = shows ISSC device does not send any packet to host. =09 there exists the HCI_MAX_ACL_SIZE constant which is 1024 and the HCI_MAX_FRAME_SIZE which is 4 times HCI_MAX_ACL_SIZE. =09 What is the default frame size and max packets number an ISSC chips sends to the host if no HCI_Host_Buffer_Size has been called? =09 > After sending HCI_Host_Buffer_Size command, hcidump shows = ISSC > device sends max size of 256 byte to host. Ping with 1500 bytes and = Internet > access work so far. I only try this with PAN to implement NAP. =09 The kernel has the HCI_Host_Buffer_Size command in its code, but it is commented out. I forget the reason why this has been done, but I assume there was a reason for it. =09 Regards =09 Marcel =09 =09 =09 =09 ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting = language that extends applications into web and mobile media. Attend the live = webcast and join the prime developer group breaking into this new coding = territory! = http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D110944&bid=3D241720&dat=3D= 121642 _______________________________________________ Bluez-users mailing list Bluez-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users =09 ------_=_NextPart_001_01C64659.5352ACC0 Content-Type: application/ms-tnef; name="winmail.dat" Content-Transfer-Encoding: base64 eJ8+IgoEAQaQCAAEAAAAAAABAAEAAQeQBgAIAAAAtgMAAAAAAAC5AAEIgAcAGAAAAElQTS5NaWNy b3NvZnQgTWFpbC5Ob3RlADEIAQ2ABAACAAAAAgACAAEEgAEAPAAAAFJFOiBbQmx1ZXotdXNlcnNd IElTU0MgVVNCIGRvbmdsZSBjYW4ndCBwaW5nIHdpdGggc2l6ZSAxMDAwAFITAQWAAwAOAAAA1gcD AA0ADAAwAAkAAQAzAQEggAMADgAAANYHAwANAAwAMAAJAAEAMwEBCYABACEAAABEQzlEODgwQTFG RThGQzQ1OTFBMTVCQjUxOThGQTAwMgBQBwEDkAYAkBUAADYAAAADADYAAAAAAEAAOQDArFJTWUbG AR4APQABAAAABQAAAFJFOiAAAAAAAgFHAAEAAAAtAAAAYz11czthPSA7cD11bmltaXM7bD1ORVRC 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Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 _______________________________________________ Bluez-users mailing list Bluez-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users