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            Benjamin

            靜以修身,儉以養德,非澹薄無以明志,非寧靜無以致遠。
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            數據加載中……

            如何判斷GPRS的接入點

            思路:用ConnMgrQueryDetailedStatus找到Dest GUID, 然后根據Dest GUID用DMProcessConfigXML函數透過CM_GPRSEntries Configuration Service Provider來查接入點名稱。
            示例代碼:


            #include <stdlib.h>
            #include <windows.h>

            #include <connmgr.h>
            #include <Connmgr_status.h>
            #include <Cfgmgrapi.h>
            #include <strsafe.h>

            //
            //   FUNCTION: GetAPNFromEntryName(LPCTSTR szEntryName, LPTSTR szAPN, int cchAPN)
            //
            //   PURPOSE: Get the GPRS Access Point Name form the Entry Name
            //
            HRESULT GetAPNFromEntryName(LPCTSTR szEntryName, LPTSTR szAPN, int cchAPN)
            {
                // parm query formating string of "CM_GPRSEntries Configuration Service Provider"
                LPCTSTR szFormat =    TEXT("<wap-provisioningdoc>")
                                    TEXT("    <characteristic type=\"CM_GPRSEntries\">")
                                    TEXT("        <characteristic type=\"%s\">")
                                    TEXT("            <characteristic type=\"DevSpecificCellular\">")
                                    TEXT("                <parm-query name=\"GPRSInfoAccessPointName\"/>")
                                    TEXT("            </characteristic>")
                                    TEXT("        </characteristic>")
                                    TEXT("    </characteristic>")
                                    TEXT("</wap-provisioningdoc>");
                HRESULT hr = E_FAIL;
                LPTSTR szOutput   = NULL;


                if(NULL == szEntryName)
                    return E_INVALIDARG;


                // prepare the query string with the special entry name
                LPTSTR szInput = new TCHAR[_tcslen(szFormat) + _tcslen(szEntryName) + 10];
                if(NULL == hr)
                    return E_OUTOFMEMORY;

                _stprintf(szInput, szFormat, szEntryName);
               

                // Process the XML.
                hr = DMProcessConfigXML(szInput, CFGFLAG_PROCESS, &szOutput);

                if(S_OK == hr)
                {
                    hr = E_FAIL;

                    // find the value of GPRSInfoAccessPointName param
                    LPTSTR szAPNStrStart = _tcsstr(szOutput, TEXT("value=\""));
                    if(NULL != szAPNStrStart)
                    {
                        szAPNStrStart += _tcslen(TEXT("value=\""));

                        // find the end of value string
                        LPTSTR szAPNStrEnd = _tcsstr(szAPNStrStart, TEXT("\""));
                        if(NULL != szAPNStrEnd)
                        {
                            // set the null char at the end of the value string
                            *szAPNStrEnd = TEXT('\0');

                            // get the final Access Point Name string
                            _tcsncpy(szAPN, szAPNStrStart, cchAPN);
                            hr = S_OK;
                        }
                    }

                }

                // the caller must delete the XML returned from DMProcessConfigXML.
                delete[] szOutput;

                // clear the input string
                delete[] szInput;

                return hr;
            }


            //
            // we will enum the all connected GPRS
            // and display their entry name and APN on the message box
            //
            int WINAPI WinMain(HINSTANCE hInstance,
                               HINSTANCE hPrevInstance,
                               LPTSTR    lpCmdLine,
                               int       nCmdShow)
            {
                TCHAR szAPN[200];

                DWORD dwSize = 0;
                HRESULT hr = E_FAIL;

                //
                // Get the the required size of the buffer
                // with which the function needs to be called on the next attempt.
                //
                hr = ConnMgrQueryDetailedStatus(NULL, &dwSize);
                if(STRSAFE_E_INSUFFICIENT_BUFFER != hr)
                    return hr;

                LPBYTE pBuffer = new BYTE[dwSize];
                if(NULL == pBuffer)
                    return E_OUTOFMEMORY;

                //
                // Get the connection information
                //
                hr = ConnMgrQueryDetailedStatus((CONNMGR_CONNECTION_DETAILED_STATUS*)pBuffer, &dwSize);
                if(S_OK == hr)
                {

                    //
                    // Enum each connection entry
                    //
                    CONNMGR_CONNECTION_DETAILED_STATUS* cmStatus  = (CONNMGR_CONNECTION_DETAILED_STATUS*)pBuffer;
                    while(NULL != cmStatus)
                    {
                        // find the connected GPRS entry
                        if((cmStatus->dwParams & (CONNMGRDETAILEDSTATUS_PARAM_TYPE | CONNMGRDETAILEDSTATUS_PARAM_DESCRIPTION | CONNMGRDETAILEDSTATUS_PARAM_CONNSTATUS)) &&
                            CM_CONNTYPE_CELLULAR == cmStatus->dwType &&
                            CONNMGR_STATUS_CONNECTED == cmStatus->dwConnectionStatus &&
                            NULL != cmStatus->szDescription)       
                        {
                            // get the connected GPRS APN
                            if(S_OK == GetAPNFromEntryName(cmStatus->szDescription, szAPN, 200))
                                MessageBox(NULL, szAPN, cmStatus->szDescription, MB_OK | MB_ICONINFORMATION);

                        }

                        // test the next one
                        cmStatus = cmStatus->pNext;
                    }
                }


                // clear the buffer
                delete pBuffer;


                return 0;
            }

            posted on 2009-02-09 17:09 Benjamin 閱讀(1772) 評論(3)  編輯 收藏 引用 所屬分類: PDA/PPC開發

            評論

            # re: 如何判斷GPRS的接入點  回復  更多評論   


            Cannot open include file: 'Connmgr_status.h': No such file or directory

            樓主,這個問題問題怎么解決啊!
            2009-07-14 10:06 | beautymind

            # re: 如何判斷GPRS的接入點  回復  更多評論   

            用了樓主的方法,想判斷 CDMA 手機是用了 CTWAP 還是 CTNET 網絡,能得到網絡的描述名稱,但是當我進一步想拿到 APN 值時,返回的 XML 字符串是類似以下的內容:
            ----------------
            <wap-provisioningdoc>

            <characteristic type="CM_GPRSEntries">
            <characteristic-error type="ctwap">
            <characteristic type="DevSpecificCellular">

            <parm-query name="GPRSInfoAccessPointName"/>

            </characteristic>

            </characteristic-error>
            </characteristic></wap-provisioningdoc>
            -------------------
            這是什么原因呢?
            2010-04-03 15:45 | Water Lin

            # re: 如何判斷GPRS的接入點  回復  更多評論   

            GPRS和CDMA是兩種不同的網絡,而且CDMA的芯片是美國高通所擁有,所以不是這么判斷的。一般在C網下不用判斷的,都是CMWAP。
            2010-04-04 08:00 | Benjamin
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