tags:

views:

208

answers:

1
Q: 

How to get amount of non-ACK-ed TCP data for the socket?

Linux has ioctl SIOCOUTQ described in man-page tcp(7) that returns amount of unsent data in socket buffers. If I understand kernel code right, all the non-ACKed data is counted as "unsent". The ioctl is available at least since 2.4.x.

Is there anything alike for {Free,Net,Open,*}BSD, Solaris, Windows?

A: 

Since TCP/IP is implemented as a stream device, it might be possible to take a kernel dive and get the queue->q_count (number of bytes on the queue).

Twelvestring  2009-05-26 23:44:39
Of course it's possible to patch kernel and get required information. I was wondering about some existing API.
darkk  2009-06-03 18:32:07

related questions

How do I get the external IP of a socket in Python?
How Do Sockets Work in C?
How do you send and receive UDP packets in Java on a multihomed machine?
Can't Re-bind a socket to an existing IP/Port Combination
Reading from a socket in C#
Sockets and Processes in Java
Stream data (such as music) using PHP (or another language)
How to forcibly close a socket in TIME_WAIT?
How do I make persistent network sockets on Unix in Ruby?
What's the idiomatic way to do async socket programming in Delphi?
How do you minimize the number of threads used in a tcp server application?
WSACancelBlockingCall exception
C# Performance For Proxy Server (vs C++)
How to get your own (local) IP-Address from an udp-socket (C/C++)
Free Network Monitor
Reconnect logic with connectivity notifications
Maximum buffer length for sendto?
Configure a Java Socket to fail-fast on disconnect?
Sockets in Pascal
Firefox plugin - sockets
How can I determine the IP of my router/gateway in Java?
ActionScript 3.0 sockets can't reconnect
Reverse DNS in Ruby?
Asynchronous multi-direction server-client communication over the same open socket?
How to use the C socket API in C++ on z/OS