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/*
* Supporting functions for the Windows socket API.
*
* Provides supporting functions and wrappers that help with portability to
* the Windows socket API.
*
* The canonical version of this file is maintained in the rra-c-util package,
* which can be found at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
*
* Written by Russ Allbery <eagle@eyrie.org>
* Copyright 2008, 2011
* The Board of Trustees of the Leland Stanford Junior University
*
* Copying and distribution of this file, with or without modification, are
* permitted in any medium without royalty provided the copyright notice and
* this notice are preserved. This file is offered as-is, without any
* warranty.
*
* SPDX-License-Identifier: FSFAP
*/
#include <config.h>
#include <portable/system.h>
#include <portable/socket.h>
/*
* Initializes the Windows socket library. The returned parameter provides
* information about the socket library, none of which we care about. Return
* true on success and false on failure.
*/
int
socket_init(void)
{
WSADATA data;
if (WSAStartup(MAKEWORD(2,2), &data))
return 0;
return 1;
}
/*
* On Windows, strerror cannot be used for socket errors (or any other errors
* over sys_nerr). Try to use FormatMessage with a local static variable
* instead.
*/
const char *
socket_strerror(err)
{
const char *message = NULL;
if (err >= sys_nerr) {
char *p;
DWORD f = FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM
| FORMAT_MESSAGE_IGNORE_INSERTS;
static char *buffer = NULL;
if (buffer != NULL)
LocalFree(buffer);
if (FormatMessage(f, NULL, err, 0, (LPTSTR) &buffer, 0, NULL) != 0) {
p = strchr(buffer, '\r');
if (p != NULL)
*p = '\0';
}
message = buffer;
}
if (message == NULL)
message = strerror(err);
return message;
}
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