#include <...>

#include <...>

#include <...>



int set_dev_addr(const char *dev_name, __u32 ipaddr)

{

	struct ifreq ifr;

	int fd;

	int err;



	strncpy(ifr.ifr_name, dev_name, IFNAMSIZ);

	ifr.ifr_addr = ipaddr;

	fd = socket(AF_INET, SOCK_DGRAM, 0);

	err = ioctl(fd, SIOCSIFADDR, &ifr);

	if (err) {

		perror("ioctl(SIOCSIFADDR)");

	}

	close(fd);

	return err;

}



main()

{

	......

	set_dev_addr("eth0", inet_addr("192.168.1.1"));

	set_dev_addr("eth0:1", inet_addr("192.168.1.2"));

	......

}