[Bluez-devel] How can i change MTU to max value?

[Bluez-devel] How can i change MTU to max value?

[Rupesh Gujare]

[-- Attachment #1.1: Type: text/plain, Size: 3939 bytes --]

 

 Hello all,
  I am programming for transferring data between my Linux box and mobile phone. But while transferring large files it takes quiet a few time. 
  I want to achieve maximum data transfer rates without affecting reliability of system. I am using "object push service" for this. And tried changing default MTU size in /usr/include/openobex/obex_const.h
  But got same results.
  Can anyone tell me how can i increase MTU size? Or is there any limitation on it? (I think Max. MTU size can be 64k).
  Any help or suggestions are appreciated.
(partial) hcidump looks something like this:-

     L2CAP(d): cid 0x0040 len 7 [psm 3]
      RFCOMM(d): UIH: cr 0 dlci 8 pf 0 ilen 3 fcs 0x80
< ACL data: handle 1 flags 0x02 dlen 678
< ACL data: handle 1 flags 0x01 dlen 338
    L2CAP(d): cid 0x0046 len 1012 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 8 pf 0 ilen 1007 fcs 0x5a
< ACL data: handle 1 flags 0x02 dlen 25
    L2CAP(d): cid 0x0046 len 21 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 8 pf 0 ilen 17 fcs 0x5a
> HCI Event: Number of Completed Packets (0x13) plen 5
> HCI Event: Number of Completed Packets (0x13) plen 5
> HCI Event: Number of Completed Packets (0x13) plen 5
> ACL data: handle 1 flags 0x02 dlen 11
    L2CAP(d): cid 0x0040 len 7 [psm 3]
      RFCOMM(d): UIH: cr 0 dlci 8 pf 0 ilen 3 fcs 0x80
< ACL data: handle 1 flags 0x02 dlen 678
< ACL data: handle 1 flags 0x01 dlen 338
    L2CAP(d): cid 0x0046 len 1012 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 8 pf 0 ilen 1007 fcs 0x5a
< ACL data: handle 1 flags 0x02 dlen 25
    L2CAP(d): cid 0x0046 len 21 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 8 pf 0 ilen 17 fcs 0x5a
> HCI Event: Number of Completed Packets (0x13) plen 5
> HCI Event: Number of Completed Packets (0x13) plen 5
> HCI Event: Number of Completed Packets (0x13) plen 5
> ACL data: handle 1 flags 0x02 dlen 11
    L2CAP(d): cid 0x0040 len 7 [psm 3]
      RFCOMM(d): UIH: cr 0 dlci 8 pf 0 ilen 3 fcs 0x80
< ACL data: handle 1 flags 0x02 dlen 678
< ACL data: handle 1 flags 0x01 dlen 338
    L2CAP(d): cid 0x0046 len 1012 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 8 pf 0 ilen 1007 fcs 0x5a
< ACL data: handle 1 flags 0x02 dlen 25
    L2CAP(d): cid 0x0046 len 21 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 8 pf 0 ilen 17 fcs 0x5a
> HCI Event: Number of Completed Packets (0x13) plen 5
> HCI Event: Number of Completed Packets (0x13) plen 5
> HCI Event: Number of Completed Packets (0x13) plen 5
> ACL data: handle 1 flags 0x02 dlen 11
    L2CAP(d): cid 0x0040 len 7 [psm 3]
      RFCOMM(d): UIH: cr 0 dlci 8 pf 0 ilen 3 fcs 0x80
< ACL data: handle 1 flags 0x02 dlen 678
< ACL data: handle 1 flags 0x01 dlen 338
    L2CAP(d): cid 0x0046 len 1012 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 8 pf 0 ilen 1007 fcs 0x5a
< ACL data: handle 1 flags 0x02 dlen 25
    L2CAP(d): cid 0x0046 len 21 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 8 pf 0 ilen 17 fcs 0x5a
> HCI Event: Number of Completed Packets (0x13) plen 5
> HCI Event: Number of Completed Packets (0x13) plen 5
> HCI Event: Number of Completed Packets (0x13) plen 5
> ACL data: handle 1 flags 0x02 dlen 11
    L2CAP(d): cid 0x0040 len 7 [psm 3]
      RFCOMM(d): UIH: cr 0 dlci 8 pf 0 ilen 3 fcs 0x80
< ACL data: handle 1 flags 0x02 dlen 678
< ACL data: handle 1 flags 0x01 dlen 338
    L2CAP(d): cid 0x0046 len 1012 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 8 pf 0 ilen 1007 fcs 0x5a
< ACL data: handle 1 flags 0x02 dlen 25
    L2CAP(d): cid 0x0046 len 21 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 8 pf 0 ilen 17 fcs 0x5a
> HCI Event: Number of Completed Packets (0x13) plen 5
> HCI Event: Number of Completed Packets (0x13) plen 5
> HCI Event: Number of Completed Packets (0x13) plen 5
> ACL data: handle 1 flags 0x02 dlen 11
    L2CAP(d): cid 0x0040 len 7 [psm 3]
      RFCOMM(d): UIH: cr 0 dlci 8 pf 0 ilen 3 fcs 0x80
< ACL data: handle 1 flags 0x02 dlen 678
< ACL data: handle 1 flags 0x01 dlen 338

[-- Attachment #1.2: Type: text/html, Size: 5131 bytes --]

[-- Attachment #2: Type: text/plain, Size: 373 bytes --]

-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642

[-- Attachment #3: Type: text/plain, Size: 164 bytes --]

_______________________________________________
Bluez-devel mailing list
Bluez-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bluez-devel

Re: [Bluez-devel] How can i change MTU to max value?

[Marcel Holtmann]

Hi,

>   I am programming for transferring data between my Linux box and
> mobile phone. But while transferring large files it takes quiet a few
> time. 
>   I want to achieve maximum data transfer rates without affecting
> reliability of system. I am using "object push service" for this. And
> tried changing default MTU size in /usr/include/openobex/obex_const.h
>   But got same results.
>   Can anyone tell me how can i increase MTU size? Or is there any
> limitation on it? (I think Max. MTU size can be 64k).

the maximum MTU is used by default.

Regards

Marcel



-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
_______________________________________________
Bluez-devel mailing list
Bluez-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bluez-devel