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/* MSPDebug - debugging tool for MSP430 MCUs
* Copyright (C) 2009, 2010 Daniel Beer
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __Windows__
#include <sys/select.h>
#endif
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "sockets.h"
#include "util.h"
#include "ctrlc.h"
#ifdef __Windows__
#include <windows.h>
#endif
#ifdef __Windows__
static DWORD error_save = 0;
static void sockets_begin(SOCKET s, DWORD event)
{
u_long mode = 1;
ioctlsocket(s, FIONBIO, &mode);
WSAEventSelect(s, ctrlc_win32_event(), event);
/* We explicitly check for Ctrl+C after resetting the event in
* sockets_wait().
*/
ResetEvent(ctrlc_win32_event());
}
static int sockets_wait(DWORD timeout)
{
DWORD r;
error_save = WSAGetLastError();
if (ctrlc_check())
error_save = ERROR_OPERATION_ABORTED;
if (error_save != WSAEWOULDBLOCK)
return -1;
r = WaitForSingleObject(ctrlc_win32_event(), timeout);
if (r == WAIT_TIMEOUT) {
error_save = WAIT_TIMEOUT;
return -1;
}
return 0;
}
static void sockets_end(SOCKET s)
{
u_long mode = 0;
ioctlsocket(s, FIONBIO, &mode);
WSAEventSelect(s, ctrlc_win32_event(), 0);
WSASetLastError(error_save);
}
SOCKET sockets_accept(SOCKET s, struct sockaddr *addr, socklen_t *addrlen)
{
SOCKET client = INVALID_SOCKET;
sockets_begin(s, FD_ACCEPT);
do {
client = WSAAccept(s, addr, addrlen, NULL, 0);
} while (SOCKET_ISERR(client) && !sockets_wait(INFINITE));
sockets_end(s);
return client;
}
int sockets_connect(SOCKET s, const struct sockaddr *addr, socklen_t addrlen)
{
int ret = -1;
sockets_begin(s, FD_CONNECT);
connect(s, addr, addrlen);
do {
WSANETWORKEVENTS evts;
WSAEnumNetworkEvents(s, NULL, &evts);
if (evts.lNetworkEvents & FD_CONNECT) {
error_save = evts.iErrorCode[FD_CONNECT_BIT];
if (!error_save)
ret = 0;
break;
}
} while (!sockets_wait(INFINITE));
sockets_end(s);
return ret;
}
ssize_t sockets_send(SOCKET s, const void *buf, size_t len, int flags)
{
int ret = -1;
sockets_begin(s, FD_WRITE | FD_CLOSE);
do {
ret = send(s, buf, len, flags);
} while (ret < 0 && !sockets_wait(INFINITE));
sockets_end(s);
return ret;
}
ssize_t sockets_recv(SOCKET s, void *buf, size_t len, int flags,
int timeout_ms, int *was_timeout)
{
int ret = -1;
DWORD to_arg = (timeout_ms >= 0) ? timeout_ms : INFINITE;
sockets_begin(s, FD_READ | FD_CLOSE);
do {
ret = recv(s, buf, len, flags);
} while (ret < 0 && !sockets_wait(to_arg));
if (was_timeout)
*was_timeout = (ret < 0 && (error_save == WAIT_TIMEOUT));
sockets_end(s);
return ret;
}
#else /* __Windows__ */
SOCKET sockets_accept(SOCKET s, struct sockaddr *addr, socklen_t *addrlen)
{
return accept(s, addr, addrlen);
}
int sockets_connect(SOCKET s, const struct sockaddr *addr, socklen_t addrlen)
{
return connect(s, addr, addrlen);
}
ssize_t sockets_send(SOCKET s, const void *buf, size_t len, int flags)
{
return send(s, buf, len, flags);
}
ssize_t sockets_recv(SOCKET s, void *buf, size_t buf_len, int flags,
int timeout_ms, int *was_timeout)
{
fd_set r;
struct timeval to = {
.tv_sec = timeout_ms / 1000,
.tv_usec = timeout_ms % 1000
};
FD_ZERO(&r);
FD_SET(s, &r);
if (select(s + 1, &r, NULL, NULL,
timeout_ms < 0 ? NULL : &to) < 0)
return -1;
if (was_timeout)
*was_timeout = !FD_ISSET(s, &r);
if (!FD_ISSET(s, &r)) {
errno = ETIMEDOUT;
return 0;
}
return recv(s, buf, buf_len, flags);
}
#endif
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