September 2002
Intermediate to advanced
560 pages
13h 16m
English
book
VRRP: Increasing Reliability and Failover with the Virtual Router Redundance Protocol
by Ayikudy Srikanth, Adnan Adam Onart
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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 ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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