boinc/client/win/win_net.cpp

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// The contents of this file are subject to the BOINC Public License
// Version 1.0 (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License at
// http://boinc.berkeley.edu/license_1.0.txt
//
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
// License for the specific language governing rights and limitations
// under the License.
//
// The Original Code is the Berkeley Open Infrastructure for Network Computing.
//
// The Initial Developer of the Original Code is the SETI@home project.
// Portions created by the SETI@home project are Copyright (C) 2002
// University of California at Berkeley. All Rights Reserved.
//
// Contributor(s):
//
#include "stdafx.h"
#include "win_net.h"
#include "client_state.h"
#define DIAL_WAIT 60 // seconds after dial to wait (in case of cancel)
#define CONFIRM_WAIT 60 // seconds after user says not to connect to ask again
#define CLOSE_WAIT 5 // seconds after last call to close that the connection should be terminated
int net_ref_count = -1; // -1 closed, 0 open but not used, >0 number of users
double net_last_req_time = 0; // last time user was requested to connect in seconds
double net_last_dial_time = 0; // last time modem was dialed
double net_close_time = 0; // 0 don't close, >0 time when network connection should be terminated in seconds
bool dialed = false;
int NetOpen( void )
{
if(net_ref_count >= 0) {
net_ref_count ++;
return 0;
}
WSADATA wsdata;
WORD wVersionRequested;
int rc, addrlen = 16;
typedef BOOL (WINAPI *GetStateProc)( OUT LPDWORD lpdwFlags, IN DWORD dwReserved);
typedef BOOL (WINAPI *AutoDialProc)( IN DWORD dwFlags, IN DWORD dwReserved);
GetStateProc GetState = NULL;
AutoDialProc AutoDial = NULL;
DWORD connectionFlags;
HMODULE libmodule = NULL;
libmodule = LoadLibrary("wininet.dll");
if (libmodule) {
GetState = (GetStateProc)GetProcAddress(libmodule, "InternetGetConnectedState");
AutoDial = (AutoDialProc)GetProcAddress(libmodule, "InternetAutodial");
if (GetState && AutoDial) {
rc = (*GetState)(&connectionFlags, 0);
// Don't Autodial if already connected to Internet by Modem or LAN
if (!rc) {
if((double)time(NULL) < net_last_dial_time + CONFIRM_WAIT) {
return -1;
}
#if !defined(_WIN32) && !defined(_CONSOLE)
if(gstate.global_prefs.confirm_before_connecting) {
net_last_req_time = (double)time(NULL);
if(!RequestNetConnect()) {
return -1;
}
}
#endif
net_last_dial_time = (double)time(NULL);
rc = (*AutoDial)(INTERNET_AUTODIAL_FORCE_UNATTENDED, 0);
if (rc) {
dialed = true;
} else {
// InternetAutodial() returns error 86 for some users
// and 668 for some other users, but a subsequent call
// to gethostbyname() or connect() autodials successfully.
// So (with one exception) we ignore failure returns
// from InternetAutodial() to work around this problem.
// Error 86 is "The specified Network Password is not correct."
// Error 668 is RAS Error "The connection dropped."
rc = GetLastError();
// Don't continue if busy signal, no answer or user cancelled
if (rc == ERROR_USER_DISCONNECTION) {
return -1;
}
}
}
}
}
wVersionRequested = MAKEWORD(1, 1);
rc = WSAStartup(wVersionRequested, &wsdata);
if (rc) {
return -1;
}
net_ref_count = 1;
return 0;
}
void NetClose( void )
{
if(net_ref_count > 0) net_ref_count --;
if(net_ref_count == 0) {
net_close_time = (double)time(NULL) + CLOSE_WAIT;
}
}
void NetCheck( void ) {
if(net_ref_count == 0 && net_close_time > 0 && net_close_time < (double)time(NULL)) {
WSACleanup();
typedef BOOL (WINAPI *HangupProc)(IN DWORD dwReserved);
HangupProc HangUp = NULL;
HMODULE libmodule = NULL;
// Hang up the modem if we dialed it
if (dialed && gstate.global_prefs.hangup_if_dialed) {
libmodule = LoadLibrary("wininet.dll");
if (libmodule) {
HangUp = (HangupProc)GetProcAddress(libmodule, "InternetAutodialHangup");
if (HangUp) int rc = (* HangUp)(0);
}
}
dialed = false;
net_ref_count = -1;
net_close_time = 0;
}
}