From 4bbcedddd573e2d4ef4880d4d2fad26dbb73cddd Mon Sep 17 00:00:00 2001
From: Eric Heien <eric@heien.org>
Date: Wed, 18 Dec 2002 20:20:04 +0000
Subject: [PATCH] confirm before connecting

svn path=/trunk/boinc/; revision=762
---
 client/win/win_net.cpp | 101 ++++++++++++++++++++++++++++++++++++-----
 client/win/win_net.h   |   4 ++
 2 files changed, 94 insertions(+), 11 deletions(-)

diff --git a/client/win/win_net.cpp b/client/win/win_net.cpp
index e83a714690..4725062741 100644
--- a/client/win/win_net.cpp
+++ b/client/win/win_net.cpp
@@ -21,38 +21,117 @@
 #include <winsock.h>
 #include <string.h>
 #include <stdio.h>
+#include <wininet.h>
+#include <raserror.h>
 
 #include "win_net.h"
+#include "wingui.h"
+#include "client_state.h"
 
+#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_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;
 
-	// TODO: return if already open
+	if(gstate.global_prefs.confirm_before_connecting) {
+		if((double)time(NULL) < net_last_req_time + CONFIRM_WAIT) {
+			return -1;
+		}
+		net_last_req_time = (double)time(NULL);
+		if(!RequestNetConnect()) {
+			return -1;
+		}
+	}
 
-	// TODO: Handle permission logic here
+	typedef BOOL (WINAPI *GetStateProc)( OUT LPDWORD  lpdwFlags, IN DWORD    dwReserved);
+	typedef BOOL (WINAPI *AutoDialProc)( IN DWORD    dwFlags, IN DWORD    dwReserved);
 
-    wVersionRequested = MAKEWORD(1,1);
-    rc = WSAStartup(wVersionRequested, &wsdata);
+	GetStateProc GetState = NULL;
+	AutoDialProc AutoDial = NULL;
+	DWORD connectionFlags;
+	HMODULE libmodule = NULL;
 
-    if (rc) 
-	{
-        //printf("WSAStartup failed: error code = %d\n", rc);
-        return -1; //CANT_CONNECT;
-    }
+	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) {
+				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 )
 {
- 	WSACleanup();
+	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;
+	}
+}
diff --git a/client/win/win_net.h b/client/win/win_net.h
index 0e1a954aca..d3c46594f2 100644
--- a/client/win/win_net.h
+++ b/client/win/win_net.h
@@ -13,11 +13,15 @@
 
 extern int NetOpen( void );
 extern void NetClose( void );
+extern void NetCheck( void );
 
 
 #endif
 /*
  * $Log$
+ * Revision 1.2  2002/12/18 20:20:04  eheien
+ * confirm before connecting
+ *
  * Revision 1.1  2002/08/09 21:43:19  eheien
  * Moved win files, fixed compile bugs, added user requestable quit.
  *