TCP tx buffer

[Lei Kang]

Hi,

Can the TCP tx/rx buffer size be changed? And where I can change it?
Thanks.

Regards,
Lei

[Chris Dennett]

I believe the buffers are large sized by default. Anyway, the buffer sizes are attributes in TcpSocket:

• SndBufSize: TcpSocket maximum transmit buffer size (bytes)
  • Set with class: ns3::UintegerValue
  • Underlying type: uint32_t 0:4294967295
  • Initial value: 131072
  • Flags: construct write read
• RcvBufSize: TcpSocket maximum receive buffer size (bytes)
  • Set with class: ns3::UintegerValue
  • Underlying type: uint32_t 0:4294967295
  • Initial value: 131072
  • Flags: construct write read

or can be altered using methods also in TcpSocket (TcpSocketBase, really):

SetSndBufSize (uint32_t size)
SetRcvBufSize (uint32_t size)

Cheers,
Chris

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[Lei Kang]

Hi Chris,

It is really helpful.
Thanks a lot.

Regards,
Lei

On May 5, 1:00 am, Chris Dennett <dessima...@gmail.com> wrote:
> I believe the buffers are large sized by default. Anyway, the buffer sizes
> are attributes in TcpSocket:
>

>    - *SndBufSize*:
> TcpSocket<http://www.nsnam.org/doxygen/classns3_1_1_tcp_socket.html>maximum
> transmit buffer size (bytes)
>       - Set with class:
> ns3::UintegerValue<http://www.nsnam.org/doxygen/classns3_1_1_uinteger_value.html>
>       - Underlying type:
> uint32_t<http://www.nsnam.org/doxygen/classns3_1_1_uinteger_value.html#uint32_t>0:4294967295
>       - Initial value: 131072
>       - Flags: construct write read
>    - *RcvBufSize*:
> TcpSocket<http://www.nsnam.org/doxygen/classns3_1_1_tcp_socket.html>maximum
> receive buffer size (bytes)
>       - Set with class:
> ns3::UintegerValue<http://www.nsnam.org/doxygen/classns3_1_1_uinteger_value.html>
>       - Underlying type:
> uint32_t<http://www.nsnam.org/doxygen/classns3_1_1_uinteger_value.html#uint32_t>0:4294967295
>       - Initial value: 131072
>       - Flags: construct write read

>
> or can be altered using methods also in TcpSocket (TcpSocketBase, really):
>

> *SetSndBufSize* (uint32_t size)
> *SetRcvBufSize* (uint32_t size)