获取ip地址对应的mac地址，c/c++编程实现，linux下

Posted 2023-04-11

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在linux下，要求获取一个指定ip的mac地址，在同一局域网，要求用c/c++编程实现

/**

* @send_arp.c

* @This software is intended to be used as a example to show how to send and receive arp request with Linux * PF_PACKET interface

* @Author：xuelei

**/

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <errno.h>

#include <unistd.h>

#include <netdb.h>

#include <sys/socket.h>

#include <sys/un.h>

#include <sys/ioctl.h>

#include <netinet/in.h>

#include <net/if.h>

#include <sys/types.h>

#include <asm/types.h>

#include <features.h> /* 需要里面的 glibc 版本号 */

#if __GLIBC__ >= 2 && __GLIBC_MINOR >= 1

        #include <netpacket/packet.h>

        #include <net/ethernet.h> /* 链路层（L2）协议 */

#else

        #include <asm/types.h>

        #include <linux/if_packet.h>

        #include <linux/if_ether.h> /* 链路层协议 */

#endif

#include <netinet/if_ether.h>

#define INLEN 4

#define MAC_BCAST_ADDR  (uint8_t *) "\\xff\\xff\\xff\\xff\\xff\\xff"

void usage_quit(char *arg0);

int get_ifi(char *dev, char *mac, int macln, struct in_addr *lc_addr, int ipln);

void prmac(u_char *ptr);

int main(int argc, char **argv)

        if(argc != 2)

                usage_quit(argv[0]);

        int fd, salen, n;

        u_char *mac;

        char recv_buf[120], rep_addr[16];

        struct in_addr lc_addr, req_addr;

        struct sockaddr_ll reqsa, repsa;

        struct arp_pkt

                struct ether_header eh;

                struct ether_arp ea;

                u_char padding[18];

         req;

        bzero(&reqsa, sizeof(reqsa));

        reqsa.sll_family = PF_PACKET;

        reqsa.sll_ifindex = if_nametoindex("eth0");

        if((fd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ARP))) < 0)

                perror("Socket error");

                exit(1);



        mac = (char *)malloc(ETH_ALEN);

        bzero(&req, sizeof(req));

        if(get_ifi("eth0", mac, ETH_ALEN, &lc_addr, INLEN))

                fprintf(stderr, "Error: Get host’s information failed\\n");

                exit(0);



        printf("        Host MAC is: %02x:%02x:%02x:%02x:%02x:%02x\\n",*mac,*(mac+1),*(mac+2),*(mac+3),*(mac+4),*(mac+5));

         printf("       Host IP is: %s\\n", inet_ntop(AF_INET, &lc_addr, rep_addr, 1024));

        /* 填写以太网头部*/

        memcpy(req.eh.ether_dhost, MAC_BCAST_ADDR, ETH_ALEN);

        memcpy(req.eh.ether_shost, mac, ETH_ALEN);

        req.eh.ether_type = htons(ETHERTYPE_ARP);

        /* 填写arp数据 */

        req.ea.arp_hrd = htons(ARPHRD_ETHER);

        req.ea.arp_pro = htons(ETHERTYPE_IP);

        req.ea.arp_hln = ETH_ALEN;

        req.ea.arp_pln = INLEN;

        req.ea.arp_op = htons(ARPOP_REQUEST);

        memcpy(req.ea.arp_sha, mac, ETH_ALEN);

        memcpy(req.ea.arp_spa, &lc_addr, INLEN);

        inet_aton(argv[1], req.ea.arp_tpa);

        bzero(recv_buf, sizeof(recv_buf));

        bzero(&repsa, sizeof(repsa));

        salen = sizeof(struct sockaddr_ll);

        if((n = sendto(fd, &req, sizeof(req), 0, (struct sockaddr *)&reqsa, sizeof(reqsa))) <= 0)

                perror("Sendto error");

                exit(1);



        printf("Broadcast arp request of %s, %d bytes be sent\\n\\n", argv[1], n);

        while(1)

                if((n = recvfrom(fd, recv_buf, sizeof(req), 0, (struct sockaddr *)&repsa, &salen)) <= 0)

                        perror("Recvfrom error");

                        exit(1);



                if(ntohs(*(__be16 *)(recv_buf + 20))==2 && !memcmp(req.ea.arp_tpa, recv_buf + 28, 4))

                        printf("Response from %s, %d bytes received\\n", argv[1], n);

                        printf("        Peer IP is: %s\\n", inet_ntop(AF_INET, (struct in_addr *)(recv_buf + 28), rep_addr, 1024));

                        prmac( (u_char *)(recv_buf + 22) ); //prmac( (u_char *)(recv_buf + 6) );

                        break;



                else



                    printf("Have recive data\\n");

                    break;





        free(mac);

int get_ifi(char *dev, char * mac, int macln, struct in_addr *lc_addr, int ipln)

        int reqfd, n;

        struct ifreq macreq;

        reqfd = socket(AF_INET, SOCK_DGRAM, 0);

        strcpy(macreq.ifr_name, dev);

        /* 获取本地接口MAC地址*/

        if(ioctl(reqfd, SIOCGIFHWADDR, &macreq) != 0)

                return 1;

        memcpy(mac, macreq.ifr_hwaddr.sa_data, macln);

        /* 获取本地接口IP地址*/

        if(ioctl(reqfd, SIOCGIFADDR, &macreq) != 0)

                return 1;

        memcpy(lc_addr, &((struct sockaddr_in *)(&macreq.ifr_addr))->sin_addr, ipln);

        return 0;

void prmac(u_char *ptr)

        printf("        Peer MAC is: %02x:%02x:%02x:%02x:%02x:%02x\\n",*ptr,*(ptr+1),*(ptr+2),*(ptr+3),*(ptr+4),*(ptr+5));

void usage_quit(char *arg0)

        fprintf(stderr, "Usage: %s <query_IP>\\n", arg0);

        exit(1);

参考技术A 在linux下用指令就可以获取啊，用脚本写很快的