windows獲取IP和MAC地址【Qt】

一、根據hostname獲取IP
main.cpp:
#include <QCoreApplication>
#include"noarp.h"

int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);

char iname[128];
hostent *host;

//-----------初始化winsock---------------
WSADATA wsaData;
WSAStartup(MAKEWORD(2, 2), &wsaData);
//--------------------------------------

if(gethostname(iname,sizeof(iname))!=0){
printf("hostname_Error:%d\n",WSAGetLastError());
exit(0);
}
host=gethostbyname(iname);
printf("hostname:%s\n",host->h_name);

in_addr addr;
for(int i=0;;i++){
char * p=host->h_addr_list[i];
if(p==NULL)
break;
memcpy(&addr.s_addr,p,host->h_length);
}
char *dip=inet_ntoa(addr);
printf("IP:%s\n\n\n",dip);

return a.exec();
}

noarp.h:
#ifndef NOARP_H
#define NOARP_H

#include<winsock2.h>
#include<iphlpapi.h>
#include<stdlib.h>
#include<ws2tcpip.h>

#endif // NOARP_H

noarp.pro:
#-------------------------------------------------
#
# Project created by QtCreator 2017-11-22T18:39:28
#
#-------------------------------------------------

QT += core

QT -= gui

LIBS += -lpthread libwsock32 libws2_32
LIBS += -lIphlpapi

TARGET = noarp
CONFIG += console
CONFIG -= app_bundle

TEMPLATE = app

SOURCES += main.cpp

HEADERS += \
noarp.h

注：
一、Winsock是Windows下的網絡編程接口，它是由Unix下的BSD Socket
發展而來,是一個與網絡協議無關的編程接口。
二、hostent結構體
struct hostent
{
char *h_name; //正式主機名
char **h_aliases; //主機別名
int h_addrtype; //主機IP地址類型：IPV4-AF_INET
int h_length; //主機IP地址字節長度，對於IPv4是四字
節，即32位
char **h_addr_list; //主機的IP地址列表
};

#define h_addr h_addr_list[0] //保存的是IP地址
三、動態連接庫
LIBS += -lpthread libwsock32 libws2_32
LIBS += -lIphlpapi

二、根據網卡獲取IP和MAC
main.cpp:
#include <QCoreApplication>
#include"noarp.h"

int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);

//-----------初始化winsock---------------
WSADATA wsaData;
WSAStartup(MAKEWORD(2, 2), &wsaData);
//--------------------------------------

PIP_ADAPTER_ADDRESSES pAddress=NULL;
//PIP_ADAPTER_ADDRESSES是一個指針，因此聲明時沒有獲得
實際的存儲空間，因此在下面要給其動態分配內存空間
ULONG buflen=0;
DWORD reCode=0;
GetAdaptersAddresses(AF_UNSPEC,0,NULL,pAddress,&buflen);
//GetAdaptersAddresses執行出錯，做用是獲取buflen的長度

//printf("%d\n",buflen);
pAddress = (IP_ADAPTER_ADDRESSES*) malloc(buflen);

if((reCode=GetAdaptersAddresses
(AF_INET,0,NULL,pAddress,&buflen))!=NO_ERROR){
printf("2no error\n");exit(0);
}

while(pAddress!=NULL){
PIP_ADAPTER_UNICAST_ADDRESS pUnicast=pAddress-
>FirstUnicastAddress;

for(int i=0;pUnicast!=NULL;i++){
if(pUnicast->Address.lpSockaddr-
>sa_family==AF_INET){
sockaddr_in *sa_in=(sockaddr_in *)pUnicast-
>Address.lpSockaddr;
printf("IP:%s\t",inet_ntoa(sa_in->sin_addr));
}
pUnicast=pUnicast->Next;
}

printf("MAC:%.2x-%.2x-%.2x-%.2x-%.2x-%.2x\n",
pAddress->PhysicalAddress[0],
pAddress->PhysicalAddress[1],
pAddress->PhysicalAddress[2],
pAddress->PhysicalAddress[3],
pAddress->PhysicalAddress[4],
pAddress->PhysicalAddress[5]);

pAddress=pAddress->Next;
}

return a.exec();}1）PIP_ADAPTER_ADDRESSES結構體typedef struct _IP_ADAPTER_ADDRESSES { union { ULONGLONG Alignment; struct { ULONG Length; DWORD IfIndex; }; }; struct _IP_ADAPTER_ADDRESSES *Next; PCHAR AdapterName; PIP_ADAPTER_UNICAST_ADDRESS FirstUnicastAddress; PIP_ADAPTER_ANYCAST_ADDRESS FirstAnycastAddress; PIP_ADAPTER_MULTICAST_ADDRESS FirstMulticastAddress; PIP_ADAPTER_DNS_SERVER_ADDRESS FirstDnsServerAddress; PWCHAR DnsSuffix; PWCHAR Description; PWCHAR FriendlyName; BYTE PhysicalAddress [MAX_ADAPTER_ADDRESS_LENGTH]; DWORD PhysicalAddressLength; DWORD Flags; DWORD Mtu; DWORD IfType; IF_OPER_STATUS OperStatus; DWORD Ipv6IfIndex; DWORD ZoneIndices[16]; PIP_ADAPTER_PREFIX FirstPrefix; ULONG64 TransmitLinkSpeed; ULONG64 ReceiveLinkSpeed; PIP_ADAPTER_WINS_SERVER_ADDRESS_LH FirstWinsServerAddress; PIP_ADAPTER_GATEWAY_ADDRESS_LH FirstGatewayAddress; ULONG Ipv4Metric; ULONG Ipv6Metric; IF_LUID Luid; SOCKET_ADDRESS Dhcpv4Server; NET_IF_COMPARTMENT_ID CompartmentId; NET_IF_NETWORK_GUID NetworkGuid; NET_IF_CONNECTION_TYPE ConnectionType; TUNNEL_TYPE TunnelType; SOCKET_ADDRESS Dhcpv6Server; BYTE Dhcpv6ClientDuid [MAX_DHCPV6_DUID_LENGTH]; ULONG Dhcpv6ClientDuidLength; ULONG Dhcpv6Iaid; PIP_ADAPTER_DNS_SUFFIX FirstDnsSuffix;} IP_ADAPTER_ADDRESSES, *PIP_ADAPTER_ADDRESSES;2）*PIP_ADAPTER_UNICAST_ADDRESS結構體typedef struct _IP_ADAPTER_UNICAST_ADDRESS { union { struct { ULONG Length; DWORD Flags; }; }; struct _IP_ADAPTER_UNICAST_ADDRESS *Next; SOCKET_ADDRESS Address; IP_PREFIX_ORIGIN PrefixOrigin; IP_SUFFIX_ORIGIN SuffixOrigin; IP_DAD_STATE DadState; ULONG ValidLifetime; ULONG PreferredLifetime; ULONG LeaseLifetime; UINT8 OnLinkPrefixLength;} IP_ADAPTER_UNICAST_ADDRESS, *PIP_ADAPTER_UNICAST_ADDRESS;3）SOCKET_ADDRESS結構體typedef struct _SOCKET_ADDRESS { LPSOCKADDR lpSockaddr; INT iSockaddrLength;} SOCKET_ADDRESS, *PSOCKET_ADDRESS;4）sockaddr_in結構體struct sockaddr_in { short sin_family; u_short sin_port; struct in_addr sin_addr; char sin_zero[8];};