C.3. Setting the Hardware Address of the Interface to Virtual MAC or Vice-Versa
/********************************************************* NAME : hwaddr_set *********************************************************/ static int hwaddr_set( char *ifname, char *addr, int addrlen ) { struct ifreq ifr; int fd = socket(AF_INET, SOCK_DGRAM, 0); int ret; unsigned long flags; if (fd < 0) return (-1); strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); /* get the flags */ ret = ioctl(fd, SIOCGIFFLAGS, (char *)&ifr); if( ret ) goto end; flags = ifr.ifr_flags; /* set the interface down */ ifr.ifr_flags &= ~IFF_UP; ret = ioctl(fd, SIOCSIFFLAGS, (char *)&ifr); if( ret ) goto end; /* change the hwaddr */ memcpy( ifr.ifr_hwaddr.sa_data, addr, addrlen ); ifr.ifr_hwaddr.sa_family ...Get VRRP: Increasing Reliability and Failover with the Virtual Router Redundance Protocol now with the O’Reilly learning platform.
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