Linux下如何得到本机所有IP地址及MAC地址。

  1<stdio.h>   
  2#include <sys types.h="">   
  3#include <sys param.h="">   
  4  
  5#include <sys ioctl.h="">   
  6#include <sys socket.h="">   
  7#include <net if.h="">   
  8#include <netinet in.h="">   
  9#include <net if_arp.h="">   
 10#include <arpa inet.h="">   
 11#include <unistd.h> //for close()   
 12  
 13#define MAXINTERFACES 16   
 14  
 15int main(int argc, char** argv)   
 16{   
 17int fd, intrface, retn = 0;   
 18struct ifreq buf[MAXINTERFACES];   
 19struct arpreq arp;   
 20struct ifconf ifc;   
 21  
 22if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) &gt;= 0)   
 23{   
 24ifc.ifc_len = sizeof(buf);   
 25ifc.ifc_buf = (caddr_t) buf;   
 26if (!ioctl(fd, SIOCGIFCONF, (char *) &amp;ifc))   
 27{   
 28intrface = ifc.ifc_len / sizeof(struct ifreq);   
 29printf("interface num is intrface=%d\n\n\n", intrface);   
 30while (intrface-- &gt; 0)   
 31{   
 32printf("net device %s\n", buf[intrface].ifr_name);   
 33/*Jugde whether the net card status is promisc */   
 34if (!(ioctl(fd, SIOCGIFFLAGS, (char *) &amp;buf[intrface])))   
 35{   
 36if (buf[intrface].ifr_flags &amp; IFF_PROMISC)   
 37{   
 38puts("the interface is PROMISC");   
 39retn++;   
 40}   
 41}   
 42else   
 43{   
 44char str[256];   
 45  
 46sprintf(str, "cpm: ioctl device %s",   
 47buf[intrface].ifr_name);   
 48  
 49perror(str);   
 50}   
 51  
 52/*Jugde whether the net card status is up */   
 53if (buf[intrface].ifr_flags &amp; IFF_UP)   
 54{   
 55puts("the interface status is UP");   
 56}   
 57else   
 58{   
 59puts("the interface status is DOWN");   
 60}   
 61  
 62/*Get IP of the net card */   
 63if (!(ioctl(fd, SIOCGIFADDR, (char *) &amp;buf[intrface])))   
 64{   
 65puts("IP address is:");   
 66puts(inet_ntoa(((struct sockaddr_in *)   
 67(&amp;buf[intrface].ifr_addr))-&gt;sin_addr));   
 68puts("");   
 69//puts (buf[intrface].ifr_addr.sa_data);   
 70}   
 71else   
 72{   
 73char str[256];   
 74  
 75sprintf(str, "cpm: ioctl device %s",   
 76buf[intrface].ifr_name);   
 77  
 78perror(str);   
 79}   
 80  
 81  
 82/*Get HW ADDRESS of the net card */   
 83if (!(ioctl(fd, SIOCGIFHWADDR, (char *) &amp;buf[intrface])))   
 84{   
 85puts("HW address is:");   
 86  
 87printf("%02x:%02x:%02x:%02x:%02x:%02x\n",   
 88(unsigned char) buf[intrface].ifr_hwaddr.sa_data[0],   
 89(unsigned char) buf[intrface].ifr_hwaddr.sa_data[1],   
 90(unsigned char) buf[intrface].ifr_hwaddr.sa_data[2],   
 91(unsigned char) buf[intrface].ifr_hwaddr.sa_data[3],   
 92(unsigned char) buf[intrface].ifr_hwaddr.sa_data[4],   
 93(unsigned char) buf[intrface].ifr_hwaddr.sa_data[5]);   
 94puts("");   
 95puts("");   
 96}   
 97else   
 98{   
 99char str[256];   
100  
101sprintf(str, "cpm: ioctl device %s", buf[intrface].ifr_name);   
102  
103perror(str);   
104}   
105}   
106}   
107else   
108perror("cpm: ioctl");   
109}   
110else   
111perror("cpm: socket");   
112  
113close(fd);   
114return retn;   
115}</unistd.h></arpa></net></netinet></net></sys></sys></sys></sys></stdio.h>