Error when calling bind (): Usually each socket address (...) is allowed to be used only once, how to solve it?

yczhuwei

The general flow of the program is this:

1) Create a socket object with socket ()
2) Bind the socket object to the specified address and port with bind ()
3) listen () starts listening
4) closesocket () when closing the program

There is no problem during normal operation, but if the program exits due to an illegal operation before closing it, when you restart the program, you will get an error when running to bind (): "Usually each socket address (protocol / network address / port) Only allowed once ", error number is 10048
And at this time, you can only log out of the operating system and restart it.
I want to know when I judge this error number, is there a method in the socket library function that can release the originally bound port? Experts specify one or two, thank you!

taizibj

Try WSACleanup

taizibj

Or use setsockopt to set SO_REUSEADDR

lixiaof6471

Wait about 30 seconds. Wait for TCP to become CLOSED. I have seen the state transition diagram of TCP.

爱德华德

Address multiplexing SO_REUSEADDR

2511718

Local method: disable and enable the network

yczhuwei

I tried WSACleanup
Address reuse SO_REUSEADDR, I originally wanted to try, but because my program was developed by PB, I don’t know how to call this library function (due to the parameter type problem, the call is always unsuccessful), I guess this method is OK
Native method: disable and then enable the network--this is not suitable
Waiting for 30 seconds doesn’t seem to work. I have this problem, even if I wait for a long time, I have to restart it.
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I finally call closesock() in the program system error event

yczhuwei

Thank you for your attention.