994 questions
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vote
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How to retreive IP interface DNS suffixes using winsock2? [duplicate]
In Windows, for a interface, you can set DNS suffixes to add to queries.
How do one retrieve the settings dom1.com, dom2.com using winsock2?
If I call GetAdapterAddresses the IP_ADAPTER_ADDRESSES_LH ...
- 2,988
-3
votes
1
answer
81
views
How can I filter incoming connections?
I have this select waiting for data in the socket buffer. When there is data in the buffer, I launch a thread and accept the connection.
while (!InterruptWaitForConnections)
{
const int status = ...
1
vote
0
answers
78
views
CUDA 12.8 causes #error: MFC requires use of Winsock2.h in MFC project, but works fine with CUDA 12.4
I'm working on a Windows MFC GUI application that uses CUDA for high-performance image processing.
Previously, I was using CUDA 12.0 on a system with an RTX 3090 (Ampere), and everything compiled and ...
- 153
-2
votes
1
answer
52
views
C++ Winsock UDP Port Wont Bind
I'm writing a bit of code that can listen for UDP messages via Winsock.
The port bind works on local loopback (127.0.0.1) but when I try to change to any other IP the bind fails.
Is there something I'...
- 13
0
votes
1
answer
99
views
Running the Microsoft Winsock Client and Server Code Sample
I've downloaded and successfully compiled the Microsoft Winsock Client and Server Code Sample from here. This client server combination application both work just fine running on the same computer. ...
- 97
0
votes
1
answer
74
views
Socket in C++ : Handle multiple concurrent request in Windows OS
I try to build a multi thread server so when there is multiple concurrent request, the server can handle them at the same time. But, my code still require for waiting first request to be done before ...
1
vote
1
answer
68
views
WinSock2 accept function causes access violation when used in multiple threads of one process
I am working on designing libraries in C and C++ for my company's proprietary language through ffi. The two libraries which are causing the problem related to the title are the threads and sockets ...
- 116
1
vote
1
answer
173
views
Allow Type of Service / DSCP Marking on Windows for a network socket
I'm looking to programatically mark the Type of Service / DSCP byte in packets from a network socket. The current implementation in C# is below:
UdpClient udpClient = new UdpClient();
string ...
- 11
0
votes
0
answers
41
views
How to handle if the fd has read and write at the same using select in winsock?
I saw some code examples to explain select() can handle multiple events at the same time as below:
FD_SET readfds;
FD_SET writefds;
FD_SET exceptfds;
FD_ZERO(&readfds);
FD_ZERO(&writefds);
...
- 1,035
2
votes
0
answers
122
views
Unable to recv data that recv(PEEK) returned
I was debugging some 64 bit, native C code using WinSock2 for TCP and after eliminating all of the errors I expected, I found out that WinSock2 was doing something I did not expect. Simplified for ...
- 1,207
2
votes
1
answer
99
views
does windows networking code break the strict aliasing rules?
As I was told here: can you typecast an int into 4 chars using structs?, typecasting a struct into another struct pointer is against the "strict aliasing rules". But I think that in C ...
0
votes
2
answers
79
views
what is the purpose the asterix after SOCKADDR in: bind(ListenSocket, (SOCKADDR*) &s, sizeof(s));
I haven't found an explanation to why you would put an asterix after a variable.
This is the example:
int main(){
WSADATA Winsockdata;
WSAStartup(MAKEWORD(2,2), &Winsockdata);
int ...
0
votes
2
answers
262
views
Error transfering files to Android using Windows C++ Bluetooth OBEX socket
OBEX is probably the most commonly used technique to transfer files over devices that support Bluetooth. On the contrary , with being the most common , it is not very well documented how this thing ...
- 61
0
votes
0
answers
61
views
QTcpServer stop accepting new connections
I'm caught by a strange problem.
A listening QTcpServer that is working normally suddenly stops accepting new connections (qBittorrent webui stop working).
I did a little digging into Qt's source and ...
- 467
1
vote
0
answers
25
views
Implementing a Matlab Reader using winsock2 and DLL library
I am trying to interface Matlab with a C code that I used to read data through UDP.
I am using the winsock2 library, and compiling the C code into a DLL file for it to be loaded into Matlab. My C code ...
- 11