windows are two ways to obtain the IP address of the next;
A way to obtain IPv4 and IPv6, but required WSAStartup;
That can only get to IPv4, but need not WSAStartup;
as follows:
Method one :( can get IPv4 and IPv6)
#define _WINSOCK_DEPRECATED_NO_WARNINGS #include <Winsock2.h> #include <stdio.h> #include <iostream> #include <cstring> #include<ws2tcpip.h> #pragma comment(lib, "ws2_32.lib ") //linking to the library using namespace std; int get_ip() { struct addrinfo *ailist, *aip; struct addrinfo hint; struct sockaddr_in6 *sinp6; PHOSTENT hostinfo; char hostname [ 255 ] = { 0 }; // hostname char * Port = " 3294 " ; // port number const char * addr; int ILRC; the gethostname (hostname, the sizeof (hostname)); IF ((= Hostinfo the gethostbyname (hostname)) == NULL) // obtain a local address ipv4 { errno = GetLastError(); fprintf(stderr,"gethostbyname Error:%d\n", errno); return 1; } LPCSTR ip; the while (* (hostinfo-> the h_addr_list)! = NULL) // output ipv4 address { ip = inet_ntoa(*(struct in_addr *) *hostinfo->h_addr_list); printf("ipv4 addr = %s\n\n", ip); hostinfo->h_addr_list++; } hint.ai_family = the AF_INET6; // defining hint provided hint.ai_socktype = SOCK_STREAM; // here, but such setting socket type SOCK_DGRAM hint.ai_flags = AI_PASSIVE into; // number of flags flag. Commonly used AI_CANONNAME; hint.ai_protocol = 0 ; // set the protocol is generally 0, the default hint.ai_addrlen = 0 ; // below can not be set as 0, or a NULL hint.ai_canonname = NULL; hint.ai_addr = NULL; hint.ai_next = NULL; ILRC = the getaddrinfo (hostname, Port, & hint, & ailist); // get the address information of the host name IF (ILRC < 0 ) { char str_error[100]; strcpy(str_error, (char *)gai_strerror(errno)); printf("str_error = %s", str_error); return 0; } if(ailist == NULL) { printf("sorry not find the IP address,please try again \n"); } for (AIP = ailist;! = NULL AIP; AIP = aip-> ai_next) // display the information acquired { AIP -> ai_family == AF_INET6; sinp6 = ( struct sockaddr_in6 *) aip-> ai_addr; // Why is the for loop, first looking down int I; printf("ipv6 addr = "); for(i = 0; i < 16; i++) { if(((i-1)%2) && (i>0)) { printf(":"); } printf("%02x",sinp6->sin6_addr.u.Byte[i]); } printf(" \n"); printf(" \n"); } while(1); } int main () { WORD wVersionRequested; WSAData wsaData; int err; wVersionRequested = MAKEWORD ( . 1 , . 1 ); err = WSAStartup( wVersionRequested, &wsaData );//initiate the ws2_32.dll and match the version if ( err != 0 ) { return 0; } if ( LOBYTE( wsaData.wVersion ) != 1 || //if the version is not matched ,then quit and terminate the ws3_32.dll HIBYTE( wsaData.wVersion ) != 1 ) { WSACleanup( ); return 0; } get_ip(); WSACleanup( ); return 0; }
Method Two :( only take into IPv4)
//#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <WinSock2.h>
#include <Iphlpapi.h>
#include <iostream>
using namespace std;
#pragma comment (lib, "Iphlpapi.lib") // required libraries to add Iphlpapi.lib
//#pragma comment(lib, "ws2_32.lib")
int main(int argc, char* argv[])
{
// PIP_ADAPTER_INFO structure pointer card information stored in native
PIP_ADAPTER_INFO pIpAdapterInfo = new IP_ADAPTER_INFO();
// size of the structure is obtained, parameters for GetAdaptersInfo
unsigned long stSize = sizeof(IP_ADAPTER_INFO);
// call the function GetAdaptersInfo filled pIpAdapterInfo pointer variable; stSize wherein the parameter is both an input of an output
int nRel = GetAdaptersInfo(pIpAdapterInfo, &stSize);
// record the number of NICs
DWORD netCardNum = 0;
GetNumberOfInterfaces(&netCardNum);
cout << "number of NICs:" << netCardNum << endl; netCardNum = 0;
// record number of IP addresses on each card
int IPnumPerNetCard = 0;
if (ERROR_BUFFER_OVERFLOW == nRel)
{
// If the function returns ERROR_BUFFER_OVERFLOW
// then the parameters passed GetAdaptersInfo memory space is insufficient, while its spread stSize, indicates the size of the required
// This is also why stSize both an input output is a
// release the original memory space
delete pIpAdapterInfo;
// reapply memory space to store all card information
pIpAdapterInfo = (PIP_ADAPTER_INFO)new BYTE[stSize];
// call the function again GetAdaptersInfo, filling pIpAdapterInfo pointer variable
nRel = GetAdaptersInfo (pIpAdapterInfo, & stSize);
}
if (ERROR_SUCCESS == nRel)
{
// output card information
// may have more cards, and hence to judge by cycle
while (pIpAdapterInfo)
{
cout << "网卡序号：" << ++netCardNum <<"\t"<<pIpAdapterInfo->Index << endl;
cout << "网卡名称：" << pIpAdapterInfo->AdapterName << endl;
cout << "Card Description:" << pIpAdapterInfo-> Description << endl;
cout << "card type:";
switch (pIpAdapterInfo->Type)
{
case MIB_IF_TYPE_OTHER: cout << "OTHER" << endl; break;
case MIB_IF_TYPE_ETHERNET: cout << "ETHERNET" << endl; break;
case MIB_IF_TYPE_TOKENRING: cout << "TOKENRING" << endl; break;
case MIB_IF_TYPE_FDDI: cout << "FDDI" << endl; break;
case MIB_IF_TYPE_PPP: cout << "PPP" << endl; break;
case MIB_IF_TYPE_LOOPBACK: cout << "LOOPBACK" << endl; break;
case MIB_IF_TYPE_SLIP: cout << "SLIP" << endl; break;
default: cout << "" << endl; break;
}
cout << "MAC address:";
for (DWORD i = 0; i < pIpAdapterInfo->AddressLength; i++)
if (i < pIpAdapterInfo->AddressLength - 1)
{
printf("%02X-", pIpAdapterInfo->Address[i]);
}
else
{
printf("%02X\n", pIpAdapterInfo->Address[i]);
}
cout << "NIC IP address as follows:" << endl;
IPnumPerNetCard = 0;
// How could NIC IP, and therefore through the loop to judge
IP_ADDR_STRING *pIpAddrString = &(pIpAdapterInfo->IpAddressList);
do
{
cout << "IP number on the card:" << ++ IPnumPerNetCard << endl;
cout << "IP 地址：" << pIpAddrString->IpAddress.String << endl;
cout << "Subnet Mask:" << pIpAddrString-> IpMask.String << endl;
cout << "网关地址：" << pIpAdapterInfo->GatewayList.IpAddress.String << endl;
pIpAddrString = pIpAddrString->Next;
} while (pIpAddrString);
pIpAdapterInfo = pIpAdapterInfo-> Next;
cout << "--------------------------------------------------------------------" << endl;
}
}
// free up memory space
if (pIpAdapterInfo)
{
delete pIpAdapterInfo;
}
return 0;
}
Under Linux, see: http://www.cnblogs.com/lzpong/p/6956439.html