Linux 下获取LAN中指定IP的网卡的MAC（物理地址）

// all.h // 2005/06/20,a.m. wenxy #ifndef _ALL_H #define _ALL_H #include #include #include #include #include #include socket.h> #include #include #include   // --------------------- // 创建ARP包的头文件 #include #include /* #include */    #include #include // --------------------- #include #include #include using namespace std; #define MAX_MAC_LEN 24  // MAC字串缓冲区的最大长度(byte) #define COMPART_MAC ":"  // MAC字串的分格符, Warnning:修改此宏，必须再修改源程序!!! #endif /* end _ALL_h */ // end file // ------------------------------------------------------------------------------------------------------------- // main.cpp // 2005/06/20,a.m. wenxy #include "all.h" // function declare static string GetLocalMac(string & strEth); // get loacl NIC's MAC void set_ip_addr(char *,char *);   // 填充IP void set_hw_addr(char buf[], char *str); // 填充MAC static string GetMacByIP(string strSrcIP, string strSrcMAC, string strDesIP ,string strNIC); // 获取指定IP的MAC /* #define SRC_IP   "10.0.1.77"   // 源IP #define DES_IP   "10.0.1.35"   // 目的IP #define LOCAL_HW        "00:C0:4C:39:0D:6F" // 10.0.1.77的eth0的MAC #define DEVICE          "eth0"    // 接口 */ #define PADD_MAC  "00:00:00:00:00:00" // 填充的MAC #define DES_MAC   "FF:FF:FF:FF:FF:FF" // 广播MAC #define ARP_SEND_COUNT 3     // 发送ARP请求的ARP包的个数  struct ether_header  {   unsigned char  ether_dhost[6];          /* destination eth addr */   unsigned char  ether_shost[6];          /* source ether addr    */   unsigned short ether_type;              /* packet type ID field */  };  struct arp_header  {   unsigned short int ar_hrd;              /* Format of hardware address.  */   unsigned short int ar_pro;              /* Format of protocol address.  */   unsigned char ar_hln;                   /* Length of hardware address.  */   unsigned char ar_pln;                   /* Length of protocol address.  */   // -------------------------   unsigned short int ar_op;               /* ARP opcode (command).  */   unsigned char __ar_sha[6];              /* Sender hardware address.  */   unsigned char __ar_sip[4];              /* Sender IP address.  */   unsigned char __ar_tha[6];              /* Target hardware address.  */   unsigned char __ar_tip[4];              /* Target IP address.  */   // -------------------------  };  struct arp_packet  {   struct ether_header ethhdr;   struct arp_header arphdr;   unsigned char padding[18];              /* filled with 0 */  };    /* arp reply:  *      op = 2  *      ethhdr.ether_dhost = arphdr.__ar_tha = switch hard addr  *      ethhdr.ether_shost = arphdr.__ar_sha = local hard addr  *      arphdr.__ar_tip = switch ip  *      arphdr.__ar_sip = victim ip  */ #define FRAME_TYPE      0x0806                  /* arp=0x0806,rarp=0x8035 */ #define HARD_TYPE       1                       /* ethernet is 1 */ #define PROTO_TYPE      0x0800                  /* IP is 0x0800 */ #define OP_CODE         1                       /* arp=1/2,1为请求，2为应答,rarp=3/4 */     // linux下获取LAN里指定IP的网卡MAC // In: argv[1]:本机IP，argv[2]:目的IP // Out:  int main( int argc, char *argv[] ) {  string strETH;  // 本机NIC名称  string strLocalMAC; // 本机MAC  string strSrcIP; // 本机IP  string strDesMAC; // 目的MAC  string strDesIP; // 目的IP    // 检查参数  if ( argc != 4 )  {   printf("Useage: get_mac [interface name of the IP] [IP] [ARP IP]/n/n");   return 0;  }    strETH = argv[1]; //"eth0";  strSrcIP = argv[2]; //"10.0.1.77";  strDesIP = argv[3]; //"10.0.1.69";    printf("Run ....../n");  printf("获取 %s 接口的MAC ....../n", strETH.c_str());  // 获取指定NIC名称的MAC  strLocalMAC = GetLocalMac(strETH);  #if 0  printf("Note: %s[%s]/n", strETH.c_str(), strLocalMAC.c_str()); #endif    // 获取指定接口MAC  if ( 0 == strcmp( (const char*)strLocalMAC.c_str(), (const char*)"") )  {   printf("Error: call strcmp() failed/n");   printf("--------------------------------/n/n");   return -1;  }  else  {   printf("获取接口MAC成功: %s [%s]/n", strETH.c_str(), strLocalMAC.c_str());  }    // 获取指定IP网卡的MAC  strDesMAC = GetMacByIP(strSrcIP, strLocalMAC, strDesIP, strETH);     printf("strDesMAC = %s/n", strDesMAC.c_str());  //  return 0; } // 获取本地某网卡的MAC // In: strEth // Out: 若成功，返回MAC字符串，失败，返回""(空串) static string GetLocalMac(string & strEth) {  string strLocalMAC;  int s;  struct ifreq buffer;  char chBuff[MAX_MAC_LEN];    memset(chBuff, 0x0, sizeof(chBuff));  //arp_process(NULL);     s = socket(PF_INET, SOCK_DGRAM, 0);   if (-1 == s)  {   printf("Error: create socket failture/n");   printf("--------------------------------/n/n");   return "";  }     memset(&buffer, 0x00, sizeof(buffer));      strcpy(buffer.ifr_name, strEth.c_str());  // "eth0"      if ( -1 == ioctl(s, SIOCGIFHWADDR, &buffer))  {   printf("Error: 获取接口 %S MAC 失败/n", strEth.c_str());   printf("--------------------------------/n/n");   return "";     }      close(s);       for( s = 0; s < 6; s++ )  {   memset(chBuff, 0x0, sizeof(chBuff));   sprintf( chBuff, "%.2X", (unsigned char)buffer.ifr_hwaddr.sa_data[s]);   strLocalMAC += chBuff;      //printf("%.2X", (unsigned char)buffer.ifr_hwaddr.sa_data[s]);   if (s < 5)   {    memset(chBuff, 0x0, sizeof(chBuff));    sprintf( chBuff, "%s", COMPART_MAC);    strLocalMAC += chBuff;    //printf(":");   }  }      //printf("/n");       return strLocalMAC;  } //------------------------------------------------------- // 发送ARP包，并接收ARP应答包，取出MAC // In: strSrcIP:本机IP，strSrcMAC:本机IP的MAC，strDesIP:被请求应答MAC的IP , strNIC:本地接口名 // Out: 若成功，返回MAC，失败返回""(空串) static string GetMacByIP(string strSrcIP, string strSrcMAC, string strDesIP ,string strNIC) {  int sockfd;     // socket handle  struct arp_packet arp;  // arp 请求包  struct arp_packet arpRes; // arp 应用答包  struct sockaddr sa;   // eth    char chSrcIP[24];  char chDesIP[24];  char chSrcMAC[24];  char chNIC[8];      memset(chSrcIP, 0x00, sizeof(chSrcIP));  memset(chDesIP, 0x00, sizeof(chDesIP));  memset(chSrcMAC, 0x00, sizeof(chSrcMAC));  memset(chNIC, 0x00, sizeof(chNIC));  sprintf(chSrcIP, "%s",  strSrcIP.c_str());  sprintf(chDesIP, "%s",  strDesIP.c_str());  sprintf(chSrcMAC, "%s", strSrcMAC.c_str());  sprintf(chNIC, "%s", strNIC.c_str());   #define SRC_IP   chSrcIP  // 源IP  #define DES_IP   chDesIP  // 目的IP  #define LOCAL_HW        chSrcMAC // eth0的MAC   #define DEVICE   chNIC  // 本机接口名     memset(&arp, 0x00, sizeof(arp));  memset(&arpRes, 0x00, sizeof(arpRes));  #if 1  printf("源IP[%s]  源MAC[%s] 目的IP[%s]/n", /    strSrcIP.c_str(), strSrcMAC.c_str(), strDesIP.c_str());    #endif    sockfd = socket(AF_INET, SOCK_PACKET, htons(0x0806));  if(sockfd < 0)  {   printf("Error: create socket failed/n");   printf("--------------------------------/n/n");      return "";  }    /*  // 设置socket为非阻塞模式  if ( -1 != fcntl(sockfd, F_SETFL, O_NONBLOCK) )  {   printf("设置socket为非阻塞模式成功/n");  }  else  {   printf("Warning: 设置socket为非阻塞模式失败[errno = %d]/n", errno);  }  */    // 设置socket接收超时  struct timeval tv;  tv.tv_sec = 0;  tv.tv_usec= 100;  if ( 0 == setsockopt( sockfd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) )  {   printf("设置socket接收超时成功/n");   }  else  {   printf("Warning: 设置socket接收超时失败[errno = %d]/n", errno);  }  #if 1  printf("创建socket SOCK_PACKET 成功/n");  printf("Note: 创建ARP请求包 ....../n");  printf("--------------------------------/n/n");   #endif    // 创建ARP请求包   /* init arp packet header */  arp.ethhdr.ether_type = htons(FRAME_TYPE);  set_hw_addr( (char *)arp.ethhdr.ether_dhost, DES_MAC );    set_hw_addr( (char *)arp.ethhdr.ether_shost, LOCAL_HW );  #if 1  printf("%x|", arp.ethhdr.ether_type);  for (int i = 0; i < 6; i++)  {   printf("%d_", arp.ethhdr.ether_dhost[i]);    }  printf("|");  for (int i = 0; i < 6; i++)  {   printf("%d_", arp.ethhdr.ether_shost[i]);    }   printf("/n--------------------------------/n");   printf("初始化ARP包帧头(以太网首部)成功/n/n");    #endif      /* init arp packet data */   printf("初始化ARP包帧数据(ARP请求分组) ....../n");   printf("--------------------------------/n");   arp.arphdr.ar_hrd = htons(HARD_TYPE); // 1  arp.arphdr.ar_pro = htons(PROTO_TYPE); // 0x0800  arp.arphdr.ar_op = htons(OP_CODE);  // 1  arp.arphdr.ar_hln = (unsigned char)(6);  arp.arphdr.ar_pln = (unsigned char)(4);  #if 1  printf("%d|%d|%d|%d|%d|/n", arp.arphdr.ar_hrd, arp.arphdr.ar_pro, /    arp.arphdr.ar_op, arp.arphdr.ar_hln, arp.arphdr.ar_pln);  printf("--------------------------------/n");      #endif    set_hw_addr((char *)arp.arphdr.__ar_tha, DES_MAC); // 请求IP的MAC   set_hw_addr((char *)arp.arphdr.__ar_sha, LOCAL_HW); // 发送者的MAC   set_ip_addr((char *)arp.arphdr.__ar_tip, DES_IP); // 请求MAC的IP   set_ip_addr((char *)arp.arphdr.__ar_sip, SRC_IP); // 源IP  bzero(arp.padding, 18); // 填充18个字节  #if 1  for (int i = 0; i < 6; i++)  {   printf("%d_", arp.arphdr.__ar_sha[i]);    }  printf("|");  for (int i = 0; i < 6; i++)  {   printf("%d_", arp.arphdr.__ar_sip[i]);    }  printf("|");   for (int i = 0; i < 6; i++)  {   printf("%d_", arp.arphdr.__ar_tha[i]);    }  printf("|");  for (int i = 0; i < 6; i++)  {   printf("%d_", arp.arphdr.__ar_tip[i]);    }  printf("|");  printf("/n--------------------------------/n");    #endif     /* send arp reply packet */  memset(&sa, 0x00, sizeof(sa));  strcpy(sa.sa_data, DEVICE);    // 发送ARP包  int nSendCount = ARP_SEND_COUNT;  while( (nSendCount --) > 0)  {   printf("发送ARP请求包[%d Bytes]...... [第%d个]/n", sizeof(arp), nSendCount);      if( sendto(sockfd, &arp, sizeof(arp), 0, (struct sockaddr*) &sa, sizeof(sa)) < 0 )   {    printf("Error: 发送ARP包失败 [errno = %d]/n", errno);    return "";   }  }    // 接收ARP应答包  printf("NOte: 接收ARP应答 ....../n");  int nTryCount = 5;  int nRecvByte = 0;  int nAddrLen = sizeof(sa);  do  {   nRecvByte = recvfrom(sockfd, &arpRes, sizeof(arpRes),0, (struct sockaddr*)&sa, (socklen_t*)&nAddrLen);       // 若是所请求IP的ARP应答包，退出while   string strTarIP;  /* Target IP address */   if ( nRecvByte >= 60 && 2 == ntohs(arpRes.arphdr.ar_op) )   {    char chBuff[MAX_MAC_LEN];       string strTarIP;  /* Target IP address */    // 格式化IP    for (int s = 0; s < 4; s++)    {     memset(chBuff, 0x00, sizeof(chBuff));     sprintf( (char *)chBuff, "%d", (unsigned char)arpRes.arphdr.__ar_sip[s]);     strTarIP += chBuff;     if (s < 3)     {      memset(chBuff, 0x00, sizeof(chBuff));      sprintf( (char *)chBuff, "%s", ".");      strTarIP += chBuff;     }    }    if ( !strcmp(strTarIP.c_str(), strDesIP.c_str()) )    {     printf("/n请求IP[%s] = 应答IP[%s]/n", strDesIP.c_str(), strTarIP.c_str());     break;    }   }  }while( nTryCount -- ); // 接收ARP应答包的次数  printf("已接收到ARP应答包 [%d Bytes]/n", nRecvByte);  // 接收超时，或错误  if ( nRecvByte == -1 )  {   printf("Warning: 接收超时，或计算机[%s]没有响应/n", strDesIP.c_str());   close(sockfd);   return "";  }    printf("分析ARP应答包 ....../n");   char chBuff[MAX_MAC_LEN];     string strTarIP;  /* Target IP address */  string strTarMAC;  /* Target hardware address */  memset(chBuff, 0x00, sizeof(chBuff));  // 格式化IP  for (int s = 0; s < 4; s++)  {   memset(chBuff, 0x00, sizeof(chBuff));   sprintf( (char *)chBuff, "%d", (unsigned char)arpRes.arphdr.__ar_sip[s]);   strTarIP += chBuff;   if (s < 3)   {    memset(chBuff, 0x00, sizeof(chBuff));    sprintf( (char *)chBuff, "%s", ".");    strTarIP += chBuff;   }  }   // 格式化MAC  memset(chBuff, 0x00, sizeof(chBuff));  for (int s = 0; s < 6; s++)  {   memset(chBuff, 0x00, sizeof(chBuff));   sprintf( (char *)chBuff, "%02X", (unsigned char)arpRes.arphdr.__ar_sha[s]);   strTarMAC += chBuff;   if (s < 5)   {    memset(chBuff, 0x00, sizeof(chBuff));    sprintf( (char *)chBuff, "%s", COMPART_MAC);    strTarMAC += chBuff;   }  }  // 输出目的IP，目的MAC    printf("应答IP[%s] 对应的MAC[%s]/n", strTarIP.c_str(), strTarMAC.c_str());  printf("/n--------------------------------/n/n");  close(sockfd);   // 返回被请求的MAC   return strTarMAC;   /* return */ }         // 填充MAC   void set_hw_addr (char buf[], char *str) {               int i;               char c, val;               for(i = 0; i < 6; i++)               {                       if (!(c = tolower(*str++)))                               perror("Invalid hardware address"),exit(1);                      if (isdigit(c))                              val = c - '0';                      else if (c >= 'a' && c <= 'f')                              val = c-'a'+10;                      else                              perror("Invalid hardware address"),exit(1);                      buf[i] = val << 4;                      if (!(c = tolower(*str++)))                              perror("Invalid hardware address"),exit(1);                      if (isdigit(c))                              val = c - '0';                      else if (c >= 'a' && c <= 'f')                              val = c-'a'+10;                      else                              perror("Invalid hardware address"),exit(1);                      buf[i] |= val;                      if (*str == ':')                              str++;              } }   // 填充IP void set_ip_addr(char *buf, char *str) {   struct in_addr addr;   memset(&addr, 0x00, sizeof(addr));   addr.s_addr = inet_addr(str);     memcpy(buf, &addr, 4); } //------------------------------------------------------- // end file // -------------------------------------------------------------------------------------------------------------- # makefile bin = get_mac objets = main.o rubbish = $(objets) $(bin) $(bin) : main.o  g++ -o $(bin) main.o main.o : main.cpp all.h  g++ -c main.cpp .PHONY : clean clean :  -rm $(rubbish)  # end makefile