C语言获取本机Mac地址的代码
//linux int GetLocalMacAddr(char *szMac,int *pnMacLen) { int sock; struct sockaddr_in sin; struct sockaddr sa; struct ifreq ifr; unsigned char mac[6]; sock=socket(AF_INET,SOCK_DGRAM,0); if (sock==-1) { perror("socket"); return 1; } strncpy(ifr.ifr_name,"eth0",sizeof(ifr.ifr_name)); ifr.ifr_name[IFNAMSIZ-1] = 0; memset(mac,0,sizeof(mac)); if (ioctl(sock,SIOCGIFHWADDR,&ifr)< 0) { perror("ioctl"); return 2; } memcpy(&sa,&ifr.ifr_addr,sizeof(sin)); memcpy(mac,sa.sa_data,sizeof(mac)); char curmacstr[64]; memset(curmacstr,0,sizeof(curmacstr)); //sprintf(curmacstr,"%.2X-%.2X-%.2X-%.2X-%.2X-%.2X",mac[0],mac[1],mac[2],mac[3],mac[4],mac[5]); sprintf(curmacstr,"%.2X:%.2X:%.2X:%.2X:%.2X:%.2X",mac[0],mac[1],mac[2],mac[3],mac[4],mac[5]); strcpy(szMac,curmacstr); return 0; } // windows int CUtil::GetOtherMacAddr(char *szIP,char *szBuf,int *pnBufLen) { HRESULT hr; IPAddr ipAddr; ULONG pulMac[2]; ULONG ulLen; char strMacAddr[100]={0}; ipAddr = inet_addr (szIP); memset (pulMac, 0xff, sizeof (pulMac)); ulLen = 6; hr = SendARP (ipAddr, 0, pulMac, &ulLen); if(hr!=NO_ERROR) return 1; unsigned char * mac_addr=(unsigned char*)pulMac; //sprintf(strMacAddr,"%02X-%02X-%02X-%02X-%02X-%02X",mac_addr[0],mac_addr[1], // mac_addr[2],mac_addr[3],mac_addr[4],mac_addr[5]); sprintf(strMacAddr,"%02X:%02X:%02X:%02X:%02X:%02X",mac_addr[0],mac_addr[1], mac_addr[2],mac_addr[3],mac_addr[4],mac_addr[5]); if ( *pnBufLen <= (int)strlen(strMacAddr) ) return 2; strcpy(szBuf,strMacAddr); *pnBufLen = strlen(szBuf); return 0; } int CUtil::GetLocalMacAddr(char *szMac,int *pnMacLen,char *szIP /*=NULL */) { //如果指定了IP,则直接按IP获取MAC //否则,需要先获取本机名称,再获取IP,再获取MAC if ( szIP != NULL ) return GetOtherMacAddr(szIP,szMac,pnMacLen); char szHostName[256] = {0}; int nRet = gethostname(szHostName,256); if ( nRet == SOCKET_ERROR ) return 1; //获取本机名称 struct hostent* hHost = gethostbyname(szHostName); if ( hHost == NULL || hHost->h_addr_list[0] == NULL ) return 2; //获取IP地址 memset(szHostName,0,256); strcpy(szHostName,inet_ntoa(*(struct in_addr *)hHost->h_addr_list[0])); //获取MAC return GetOtherMacAddr(szHostName,szMac,pnMacLen); }