checknetwork.cpp

来自「funambol window mobile客户端源代码」· C++ 代码 · 共 171 行

/*
 * Funambol is a mobile platform developed by Funambol, Inc. 
 * Copyright (C) 2003 - 2007 Funambol, Inc.
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License version 3 as published by
 * the Free Software Foundation with the addition of the following permission
 * added to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED
 * WORK IN WHICH THE COPYRIGHT IS OWNED BY FUNAMBOL, FUNAMBOL DISCLAIMS THE
 * WARRANTY OF NON INFRINGEMENT  OF THIRD PARTY RIGHTS.
 * 
 * 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 Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301 USA.
 * 
 * You can contact Funambol, Inc. headquarters at 643 Bair Island Road, Suite
 * 305, Redwood City, CA 94063, USA, or at email address [e-mail].
 * 
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 * 
 * In accordance with Section 7(b) of the GNU Affero General Public License
 * version 3, these Appropriate Legal Notices must retain the display of the
 * "Powered by Funambol" logo. If the display of the logo is not reasonably
 * feasible for technical reasons, the Appropriate Legal Notices must display
 * the words "Powered by Funambol".
 */

// checknet.cpp : test network status.
//
#include <winsock2.h>
#include <ws2tcpip.h>
#include <windows.h>
#include <tchar.h>
#include "base/util/utils.h"

struct in_addr BIN_IPV4_ADDR_LOOPBACK = {127, 0, 0, 1};
struct in6_addr BIN_IPV6_ADDR_LOOPBACK =   {   0x0, 0x0,
                                             0x0, 0x0,
                                             0x0, 0x0,
                                             0x0, 0x0,
                                             0x0, 0x0,
                                             0x0, 0x0,
                                             0x0, 0x0,
                                             0x0, 0x1 };
#define   MAX_LOCAL_NAME_LEN               64


static char localAddress[64] = "0.0.0.0";

static void Print(TCHAR *pFormat, ...) {
    va_list ArgList;
    TCHAR   Buffer[256];

    va_start (ArgList, pFormat);
    (void)wvsprintf (Buffer, pFormat, ArgList);

    va_end(ArgList);
}

//Function Prototypes
bool IsNetPresent();

const char* getLocalAddress()
{
    return localAddress;
}

void getIPAddress(wchar_t* address) {
    wchar_t* t = toWideChar(localAddress);
    wcscpy (address, t);
    delete [] t;
}

bool checkNetwork()
{
   WSADATA WSAData;

   WSAStartup(MAKEWORD(2,2), &WSAData);
   bool ret = IsNetPresent();
   WSACleanup();

   return ret;
}

//
// Determine if you have a IPv4 or IPv6 network address.
//
bool IsNetPresent()
{
    bool bFoundLocalAddr = false;
    char szAddrASCII[MAX_LOCAL_NAME_LEN];
    ADDRINFO AddrHints, *pAI, *pAddrInfo;

    //
    // Get the local host's name in ASCII text.
    //
    if(gethostname(szAddrASCII, MAX_LOCAL_NAME_LEN - 1))
    {

        return false;
    }

    //
    // To obtain a list of all the local
    // addresses, resolve the local name with getaddrinfo for all
    // protocol families.
    //

    memset(&AddrHints, 0, sizeof(AddrHints));
    AddrHints.ai_family = PF_UNSPEC;
    AddrHints.ai_flags = AI_PASSIVE;

    if(getaddrinfo(szAddrASCII, "10", &AddrHints, &pAddrInfo))
    {

        return false;
    }

    //
    // Search the addresses returned.
    // If any of them match the loopback address, then
    // are not connected to an outside network.
    //
    // Note: This will not tell you how many networks you
    // are connected to.  If one or more networks are present,
    // then the loopback addresses will not be included in the
    // list returned from getaddrinfo.
    //
    bFoundLocalAddr = true;
    for(pAI = pAddrInfo; pAI != NULL && bFoundLocalAddr; pAI = pAI->ai_next)
    {
        if(pAI->ai_family == PF_INET)
        {
            SOCKADDR_IN *addr = (SOCKADDR_IN *)(pAI->ai_addr);

            sprintf(localAddress, "%d.%d.%d.%d",
                    addr->sin_addr.S_un.S_un_b.s_b1,
                    addr->sin_addr.S_un.S_un_b.s_b2,
                    addr->sin_addr.S_un.S_un_b.s_b3,
                    addr->sin_addr.S_un.S_un_b.s_b4);


            if(memcmp(&(addr->sin_addr),
                &BIN_IPV4_ADDR_LOOPBACK,
                sizeof(BIN_IPV4_ADDR_LOOPBACK)) == 0)
                bFoundLocalAddr = false;
        }
        else if(pAI->ai_family == PF_INET6)
        {
            SOCKADDR_IN6 *addr = (SOCKADDR_IN6 *)(pAI->ai_addr);
            if(memcmp(&(addr->sin6_addr),
                &BIN_IPV6_ADDR_LOOPBACK,
                sizeof(BIN_IPV6_ADDR_LOOPBACK)) == 0)
                bFoundLocalAddr = false;
        }
    }

    freeaddrinfo(pAddrInfo);

    return bFoundLocalAddr;
}