getpeername (GNU Gnulib)

Gnulib module: getpeername

Portability problems fixed by Gnulib:

This function is declared in <winsock2.h> instead of <sys/socket.h> on some platforms: mingw, MSVC 14.
On Windows platforms (excluding Cygwin), error codes from this function are not placed in errno, and WSAGetLastError must be used instead.
On HP-UX 11, in 64-bit mode, when the macro _HPUX_ALT_XOPEN_SOCKET_API is not defined, this function behaves incorrectly because it is declared to take a pointer to a 64-bit wide socklen_t entity but in fact considers it as a pointer to a 32-bit wide unsigned int entity.

Portability problems not fixed by Gnulib:

Some platforms don’t have a socklen_t type; in this case this function’s third argument type is ‘int *’.