Алгоритми маршрутизації в мережах

/* get into the background */

#ifdef sgi

if (0 > _daemonize(background ? 0 : (_DF_NOCHDIR|_DF_NOFORK),

new_tracelevel == 0 ? -1 : STDOUT_FILENO,

new_tracelevel == 0 ? -1 : STDERR_FILENO,

-1))

BADERR(0, "_daemonize()");

#else

if (background && daemon(0, new_tracelevel) < 0)

BADERR(0,"daemon()");

#endif

mypid = getpid();

srandom((int)(clk.tv_sec ^ clk.tv_usec ^ mypid));

/* prepare socket connected to the kernel.

*/

rt_sock = socket(AF_ROUTE, SOCK_RAW, 0);

if (rt_sock < 0)

BADERR(1,"rt_sock = socket()");

if (fcntl(rt_sock, F_SETFL, O_NONBLOCK) == -1)

logbad(1, "fcntl(rt_sock) O_NONBLOCK: %s", strerror(errno));

off = 0;

if (setsockopt(rt_sock, SOL_SOCKET,SO_USELOOPBACK,

&off,sizeof(off)) < 0)

LOGERR("setsockopt(SO_USELOOPBACK,0)");

fix_select();