Sets the interface hardware address.
#include <sys/types.h> /* for socket(2) and related bits and pieces */ #include <sys/socket.h> /* for socket(2) */ #include <net/if.h> /* for struct ifreq */ #include <net/if_arp.h> /* for ARPHRD_ETHER */ #include <sys/ioctl.h> /* for IOCTL's */ #include <stdio.h> /* for fprintf etc */ #include <unistd.h> /* for close */ int main(int argc,char **argv) { struct ifreq ifr; int skfd; if (argc<3) { fprintf(stderr,"usage:\n%s interface hwaddr\n",argv[1]); return 1; } /* Fill in the structure */ snprintf(ifr.ifr_name, IFNAMSIZ, "%s", argv[1]); ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER; /* TODO: write some code to parse argv[2] into ifr.ifr_hwaddr.sa_data */ /* memcpy(&ifr.ifr_hwaddr.sa_data, argv[2], sizeof(ether.address)); */ /* Create a socket fd */ skfd = socket(PF_INET,SOCK_STREAM,0); /* call the IOCTL */ if (ioctl(skfd, SIOCSIFHWADDR, &ifr) < 0) { perror("ioctl(SIOCSIFHWADDR)"); return 1; } /* cleanup */ close(skfd); /* we're out of here! */ return 0; }
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