Erreur with bind a socket

hello, I try to make a little UDP server
and then I compile I have :
sock App: Couldn’t bind a socket, errno = 125

Where I can find the list and the code of errors for socket API

Thank a lot

NET+OS starts out with the standard error codes, located in c:\cygwin\usr\include\sys\errno.h.

Error 125 is EAADRNOTAVAIL (address not available).