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//
// Copyright 2024 Staysail Systems, Inc. <info@staysail.tech>
// Copyright 2018 Capitar IT Group BV <info@capitar.com>
//
// This software is supplied under the terms of the MIT License, a
// copy of which should be located in the distribution where this
// file was obtained (LICENSE.txt). A copy of the license may also be
// found online at https://opensource.org/licenses/MIT.
//
#include "core/nng_impl.h"
#ifdef NNG_PLATFORM_WINDOWS
#include <stdio.h>
static LPFN_ACCEPTEX acceptex;
static LPFN_GETACCEPTEXSOCKADDRS getacceptexsockaddrs;
static LPFN_CONNECTEX connectex;
int
nni_win_tcp_sysinit(void)
{
int rv;
WSADATA data;
if (WSAStartup(MAKEWORD(2, 2), &data) != 0) {
NNI_ASSERT(LOBYTE(data.wVersion) == 2);
NNI_ASSERT(HIBYTE(data.wVersion) == 2);
return (nni_win_error(GetLastError()));
}
DWORD nbytes;
GUID guid1 = WSAID_ACCEPTEX;
GUID guid2 = WSAID_GETACCEPTEXSOCKADDRS;
GUID guid3 = WSAID_CONNECTEX;
SOCKET s = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
if (s == INVALID_SOCKET) {
rv = nni_win_error(GetLastError());
WSACleanup();
return (rv);
}
if ((WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, &guid1,
sizeof(guid1), &acceptex, sizeof(acceptex), &nbytes, NULL,
NULL) == SOCKET_ERROR) ||
(WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, &guid2,
sizeof(guid2), &getacceptexsockaddrs,
sizeof(getacceptexsockaddrs), &nbytes, NULL,
NULL) == SOCKET_ERROR) ||
(WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, &guid3,
sizeof(guid3), &connectex, sizeof(connectex), &nbytes, NULL,
NULL) == SOCKET_ERROR)) {
rv = nni_win_error(GetLastError());
closesocket(s);
WSACleanup();
return (rv);
}
closesocket(s);
return (0);
}
int
nni_win_acceptex(SOCKET listen, SOCKET child, void *buf, LPOVERLAPPED olpd)
{
DWORD cnt = 0;
return (acceptex(listen, child, buf, 0, 256, 256, &cnt, olpd));
}
// This is called after a socket is accepted for the connection, and the buffer
// contains the peers socket addresses. It is is kind of weird, windows
// specific, and must be called only after acceptex. The caller should call
// setsockopt(s, SOL_SOCKET, SO_UPDATE_ACCEPT_CONTEXT) after calling this.
void
nni_win_get_acceptex_sockaddrs(
void *buf, SOCKADDR_STORAGE *self, SOCKADDR_STORAGE *peer)
{
SOCKADDR *self_p;
SOCKADDR *peer_p;
int self_len;
int peer_len;
getacceptexsockaddrs(
buf, 0, 256, 256, &self_p, &self_len, &peer_p, &peer_len);
(void) memcpy(self, self_p, self_len);
(void) memcpy(peer, peer_p, peer_len);
}
int
nni_win_connectex(SOCKET s, SOCKADDR *peer, int peer_len, LPOVERLAPPED olpd)
{
return (connectex(s, peer, peer_len, NULL, 0, NULL, olpd));
}
void
nni_win_tcp_sysfini(void)
{
WSACleanup();
}
#endif // NNG_PLATFORM_WINDOWS
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