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  • 網站首頁 > 物聯資訊 > 技術分享

    通過建立好連接的socket或者IP獲取對端MAC地址

    2016-09-28 00:00:00 廣州睿豐德信息科技有限公司 閱讀
    睿豐德科技 專注RFID識別技術和條碼識別技術與管理軟件的集成項目。質量追溯系統、MES系統、金蝶與條碼系統對接、用友與條碼系統對接

    #include <stdio.h> 
    #include <stdlib.h> 
    #include <errno.h> 
    #include <string.h> 
    #include <sys/types.h> 
    #include <netinet/in.h> 
    #include <sys/socket.h> 
    #include <sys/wait.h> 
    #include <sys/ioctl.h> 
    #include <net/if.h> 
    #include <netinet/in.h> 
    #include <net/if_arp.h> 
    #include <unistd.h> 
    #include <arpa/inet.h> 
    #include <pthread.h>

    int getPeerMacbySocketFd( int sockfd, char *buf, char* localethname ) 

        int ret =0; 
        struct arpreq arpreq; 
        struct sockaddr_in dstadd_in; 
        socklen_t  len = sizeof( struct sockaddr_in ); 
        memset( &arpreq, 0, sizeof( struct arpreq )); 
        memset( &dstadd_in, 0, sizeof( struct sockaddr_in ));  
        if( getpeername( sockfd, (struct sockaddr*)&dstadd_in, &len ) < 0 ) 
        { 
            perror( "get peer name wrong, %s/n", strerror(errno) ); 
            return -1; 
        } 
        else 
        { 
            memcpy( ( struct sockaddr_in * )&arpreq.arp_pa, ( struct sockaddr_in * )&dstadd_in, sizeof( struct sockaddr_in )); 
            strcpy(arpreq.arp_dev, localethname); 
            arpreq.arp_pa.sa_family = AF_INET; 
            arpreq.arp_ha.sa_family = AF_UNSPEC; 
            if( ioctl( sockfd, SIOCGARP, &arpreq ) < 0 ) 
            { 
                perror( "ioctl SIOCGARP wrong, %s/n", strerror(errno) ); 
                return -1; 
            } 
            else 
            { 
                unsigned char* ptr = (unsigned char *)arpreq.arp_ha.sa_data; 
                sprintf(buf, "%02x:%02x:%02x:%02x:%02x:%02x", *ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5)); 
            } 
         } 
         return ret; 
    }

    int gahGetPeerMacbyIp(char *ipaddr, char* buf, char* localethname) 

            int     sockfd; 
            unsigned char *ptr; 
            struct arpreq arpreq; 
            struct sockaddr_in *sin; 
            struct sockaddr_storage ss; 
            char addr[INET_ADDRSTRLEN+1];

            memset(addr, 0, INET_ADDRSTRLEN+1); 
            memset(&ss, 0, sizeof(ss));

            sockfd = socket(AF_INET, SOCK_DGRAM, 0); 
            if (sockfd == -1) { 
                    trace(3, "socket error"); 
                    return -1; 
            } 
            sin = (struct sockaddr_in *) &ss; 
            sin->sin_family = AF_INET; 
            if (inet_pton(AF_INET, ipaddr, &(sin->sin_addr)) <= 0) { 
                    trace(3, "inet_pton error"); 
                    return -1; 
            } 
            sin = (struct sockaddr_in *) &arpreq.arp_pa; 
            memcpy(sin, &ss, sizeof(struct sockaddr_in)); 
            strcpy(arpreq.arp_dev, localethname); 
            arpreq.arp_ha.sa_family = AF_UNSPEC; 
            if (ioctl(sockfd, SIOCGARP, &arpreq) < 0) { 
                    trace(3, "ioctl SIOCGARP: "); 
                    return -1; 
            } 
            ptr = (unsigned char *)arpreq.arp_ha.sa_data; 
            sprintf(buf,"%02x:%02x:%02x:%02x:%02x:%02x", *ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5)); 
            return 0; 
    }

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