C/C++ 利用IP地址得到物理位置

利用IP地址得到物理位置： 原理：這里要講的就是通過(guò)socket去發(fā)送GET請(qǐng)求，發(fā)送至轉(zhuǎn)換的網(wǎng)站，然后解析其中的內(nèi)容，這里GET的是http://ip.chinaz.com/網(wǎng)站。 步驟： 先使用Wireshark抓包工具，抓取查詢http://ip.chinaz.com/的封包，然后就可以模仿這個(gè)封包，利用socket發(fā)送GET請(qǐng)求，獲取IP地址的物理地址信息了。

從上面可以得到要發(fā)送的封包的具體格式：

GET?/?IP=223.124.1.232?HTTP/1.1rn
Host:?ip.chinaz.comrn
Connection:?keep-alivern
Upgrade-Insecure-Requests:?1rn
User-Agent:?Mozilla/5.0?(Windows?NT?6.1;?WOW64)?AppleWebKit/537.36?(KHTML,?like?Gecko)?Chrome/55.0.2883.87?Safari/537.36rn
Accept:?text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8rn
Accept-Language:?zh-CN,zh;q=0.8rnrn

使用socket進(jìn)行send發(fā)送時(shí),緩沖區(qū)填入上面的固定格式即可，這里要改的只有?IP=你要查詢的IP地址
這里還要強(qiáng)調(diào)一點(diǎn)，在上面的封包中最好不要加上Accept-Encoding: gzip, deflate, sdchrn，除非你會(huì)使用代碼解壓gzip壓縮包，否則recv接收服務(wù)器響應(yīng)回來(lái)的文檔的時(shí)候，發(fā)送的是gzip壓縮過(guò)的數(shù)據(jù)。由于我們只是查詢而已，所以去掉這個(gè)字段，讓服務(wù)器直接發(fā)回來(lái)html文檔，然后我們解析就可以了。

下面是一個(gè)解析http://ip.chinaz.com/獲取物理地址的例子：

//名字轉(zhuǎn)IP(OK,New)
char*?NET::GetIp(char*?szhostname)
{
????char*?szip?=?NULL;
????char*?ipbit?=?NULL;
????hostent*?ipstr?=?NULL;

????szip?=?new?char[30];
????if?(!szip)
????????goto?Err;
????ZeroMemory(szip,?30);
????ipstr?=?gethostbyname(szhostname);
????if?(ipstr?==?NULL)
????????goto?Err;
????ipbit?=?inet_ntoa(*(in_addr*)ipstr->h_addr);
????if?(ipbit?==?NULL)
????????goto?Err;
????memcpy(szip,?ipbit,?strlen(ipbit));


????return?szip;
Err:
????return?NULL;
}

//連接HTTP服務(wù)器（OK,Connected）
SOCKET?NET::ConnectHttpServer(char*?szip)
{
????SOCKET?szclient_socket?=?0;

????szclient_socket?=?socket(AF_INET,?SOCK_STREAM,?0);
????if?(INVALID_SOCKET?==?szclient_socket)
????????goto?Err;
????//連接服務(wù)器
????SOCKADDR_IN?info;
????info.sin_port?=?htons(80);
????info.sin_family?=?AF_INET;
????info.sin_addr.S_un.S_addr?=?inet_addr(szip);
????if?(0?!=?connect(szclient_socket,?(SOCKADDR*)&info,?sizeof(SOCKADDR)))
????????goto?Err;

????//返回
????return?szclient_socket;
Err:
????if?(szclient_socket?!=?NULL?&&?szclient_socket?!=?INVALID_SOCKET)
????{
????????closesocket(szclient_socket);
????????szclient_socket?=?0;
????}
????return?0;
}

//設(shè)置套接字緩沖區(qū)大?。∣K）
BOOL?NET::SetSocketInfo(SOCKET?szsocket,int?uBufferSize)
{
????if?(SOCKET_ERROR?==?setsockopt(szsocket,?SOL_SOCKET,?SO_RCVBUF,?(char*)&uBufferSize,?sizeof(int)))
????????goto?Err;
????if?(SOCKET_ERROR?==?setsockopt(szsocket,?SOL_SOCKET,?SO_SNDBUF,?(char*)&uBufferSize,?sizeof(int)))
????????goto?Err;
????return?TRUE;
Err:
????return?FALSE;
}


//UTF8轉(zhuǎn)ANSI字符串(OK,New)
char*?STR::Utf8ToAnsi(char*?utf8,int?len,char?szcc)
{
????BOOL?szok?=?FALSE;
????int?szlen?=?0;
????char*?szretstr?=?NULL;
????wchar_t*?whar_str?=?NULL;
????//UTF8轉(zhuǎn)UNICODE
????szlen?=?MultiByteToWideChar(CP_UTF8,?0,?utf8,?len,?NULL,?0);
????if?(szlen?<=?0)
????????goto?Err;
????szlen?+=?1;
????whar_str?=?new?wchar_t[szlen];
????if?(!whar_str)
????????goto?Err;
????ZeroMemory(whar_str,?szlen?*?sizeof(wchar_t));
????MultiByteToWideChar(CP_UTF8,?0,?utf8,?len,?whar_str,?szlen);
????if?(GetLastError()?!=?0)
????????goto?Err;
????//UNICODE轉(zhuǎn)ANSI
????szlen?=?WideCharToMultiByte(CP_ACP,?0,?whar_str,?len,?NULL,?0,&szcc,&szok);
????if?(szlen?<=?0)
????????goto?Err;
????szlen?+=?1;
????szretstr?=?new?char[szlen];
????if?(!szretstr)
????????goto?Err;
????ZeroMemory(szretstr,?szlen?*?sizeof(char));
????WideCharToMultiByte(CP_ACP,?0,?whar_str,?len,?szretstr,?szlen,?&szcc,?&szok);
????if?(GetLastError()?!=?0)
????????goto?Err;
????if?(whar_str)
????{
????????delete[]?whar_str;
????????whar_str?=?NULL;
????}
????return?szretstr;
Err:
????if?(whar_str)
????{
????????delete[]whar_str;
????????whar_str?=?NULL;
????}
????return?NULL;
}


//獲取物理地址(OK,ip.chinaz.com,New)
char*?GET_POINT::GetPoint(char*?ip_address,char*?get_ip_de_host_name)
{
????int?szlen?=?0;
????char*?szPoint?=?NULL;
????char*?szTemp?=?NULL;
????char*?szTemp2?=?NULL;
????char*?szTemp3?=?NULL;
????char*?get_host_name_ip?=?NULL;
????SOCKET?http_client_socket?=?NULL;
????char?packet[400]?="GET?/";
????strcat(packet,?"?IP=");
????strcat(packet,?ip_address);
????strcat(packet,?"?HTTP/1.1rn"?
????"Host:?"
????);
????strcat(packet,?get_ip_de_host_name);
????strcat(packet,?"rn"?
????????"Connection:?keep-alivern"?
????????"Cache-Control:?max-age=0rn"?
????????"Upgrade-Insecure-Requests:?1rn"?
????????"Accept:?text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8rn"?
????????"Accept-Language:?zh-CN,zh;q=0.8rnrn"
????);


????char*?recv_buffer?=?NULL;
????//代碼開始
????recv_buffer?=?new?char[50000];
????if?(!recv_buffer)
????????goto?Err;
????ZeroMemory(recv_buffer,?50000);
????//返回解析物理地址的主機(jī)的IP地址
????get_host_name_ip?=?NET::GetIp(get_ip_de_host_name);
????if?(get_host_name_ip?==?NULL)
????????goto?Err;

????//連接服務(wù)器
????http_client_socket?=?NET::ConnectHttpServer(get_host_name_ip);
????if?(http_client_socket?==?0)
????????goto?Err;

????//設(shè)置緩沖區(qū)大小
????if?(!NET::SetSocketInfo(http_client_socket,?30000))
????????goto?Err;
????if?(send(http_client_socket,?packet,?strlen(packet),?0)?<=?0)
????????goto?Err;
????if?(recv(http_client_socket,?recv_buffer,?50000,?0)?");?//???
????if?(szTemp?==?NULL)
????????goto?Err;
????szTemp2?=?strchr(szTemp,?'<');
????if?(szTemp2?==?NULL)
????????goto?Err;?
????szlen?=?szTemp2?-?szTemp;
????if?(szlen?<=?0)
????????goto?Err;
????szlen?+=?1;
????szPoint?=?new?char[szlen];
????if?(!szPoint)
????????goto?Err;
????ZeroMemory(szPoint,?szlen);
????memcpy(szPoint,?szTemp,?szlen?-?1);

????if?(get_host_name_ip)
????{
????????delete[]get_host_name_ip;
????????get_host_name_ip?=?NULL;
????}
????if?(http_client_socket)
????{
????????closesocket(http_client_socket);
????????http_client_socket?=?0;
????}
????if?(recv_buffer)
????{
????????delete[]recv_buffer;
????????recv_buffer?=?NULL;
????}
????if?(szTemp3)
????{
????????delete[]szTemp3;
????????szTemp3?=?NULL;
????}
????return?szPoint;
Err:
????if?(get_host_name_ip)
????{
????????delete[]get_host_name_ip;
????????get_host_name_ip?=?NULL;
????}
????if?(http_client_socket)
????{
????????closesocket(http_client_socket);
????????http_client_socket?=?0;
????}
????if?(recv_buffer)
????{
????????delete[]recv_buffer;
????????recv_buffer?=?NULL;
????}
????if?(szTemp3)
????{
????????delete[]szTemp3;
????????szTemp3?=?NULL;
????}
????return?NULL;
}

實(shí)現(xiàn)：