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Questions tagged [setsockopt]

142 questions
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How to disable the timeout setsockopt() has set?

In the program I am developing, I've set a timeout using setsockopt() in order to prevent recvfrom() from blocking indefinitely. How can I disable the timeout? (I'm on Ubuntu)
Rapidturtle
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Local socket option set vs pointer to socket option set

I wonder... what is the actual difference if you create a function that has a simple socket parameter and you do your basic instructions inside that function like setting different option to that socket (setsockopt()) and after the functions exist…
user3368555
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Transparent stunnel proxy setsockopt Operation not permitted

I am attempting to run a transparent stunnel4 proxy on a server for a websocket service. The WS server is based on the Ratchet framework and thus does not support WSS, hence the need for a proxy. When transparent is set to none in the stunnel.conf…
Jonny K
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getsockopt on OSX returns incorrect value?

I am using following program to debug a larger issue. Now if I run same program on OSX, getopt never returns me 0 or 1, it always returns whatever value for optval I have set!! There must be something obviously wrong in my program that is escaping…
Subodh Nijsure
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Set connect timout using setsockopt in Linux

I am writing a linux Qt5/c++ app that tries to connect to a peer using a QTcpSocket. I call tcpsocket->connectToHost(address,port,options) When the peer is available it works great and connects immediately. However, when the peer is not…
TSG
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ZeroMQ, XSUB does not receive

I have implemented one publisher and one subscriber network using ZeroMQ. I used XPUB and XSUB, because I want the subscriber be able to send data to publisher as well. My code works for XPUB + SUB, meaning subscriber can receive data from…
Max Li
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When the new value specified for SO_RCVBUF in setsockopt() will take effect?

My query is related to “SO_RCVBUF” option in setsocketopt() api. When the new value specified for SO_RCVBUF in setsockopt() will take effect? I am testing the flow control of TCP/IP and below is my environment. The client program is a slow reader…
user3581289
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Socket option SO_RCVTIMEO inaccurate?

I use hiredis redisSetTimeout function set timeout 10ms, when i start 100 thread it is accurate 10ms, but when i start 1000 thread, some call in redisVCommand cost 300+ms, and not timeout, can anyone explain this in detail? redisSetTimeout function…
good90
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Attaching filter to raw sockets in Linux

That question is the next step of this. I changed my code to use AF_PACKET socket, but this time, my application needs to deal with lots of traffic. I decided to use LSF filter in order to decrease the workload of my application. Here is my new…
Ramazan
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SO_BINDTODEVICE Failing for virtual interface

I am trying to run PTPDV2 (precision timing protocol) server which binds on interface for setting up multicasting. I have a following virtual interface eth1:0 Link encap:Ethernet HWaddr 00:00:50:A0:42:BD inet addr:10.2.0.17 …
rajshenoy
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increase tcp receive window on linux

Similar to Setting TCP receive window in C and working with tcpdump in Linux and Why changing value of SO_RCVBUF doesn't work?, I'm a unable to increase the initial tcp receive window greater than 5888 on ubuntu linux…
Collin Anderson
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Replaying http traffic with original source address

I want to build a testbed including a client and a web server, where I can replay some logged http get requests to the web server. So I am planning to exactly simulating the actual traffic with requests with their original source address and port…
Amir
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IP_MULTICAST_TTL and windows7

My application is creating an UDP socket and setting some options. One of the option is IP_MULTICAST_TTL. When the application is running on windows 7, and I observe the traffic on the wire with wireshark, I can see that the TTL is always 1, meaning…
magopieri
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Similar function to GetLastError in objective-C/C?

I'm doing some lovely socket programming in objective-C right now and part of my code is giving me an error (in the setsockopt method call). I was wondering if anyone knows of a similar function to the GetLastError() function in C++ that I could use…
Josh Bradley
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How to Properly Set up a UDP Socket using UDP_CORK

I have created an echo server under UDP, and am working on a client that splits up a given file into packets and transfers it to a server, which then returns the packets to be reassembled by the client. Sending the individual packets works just…
Cody
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