Алгоритми маршрутизації в мережах, Детальна інформація

if (t2.tv_sec <= 0) {

age(0);

continue;

}

if (timercmp(&t2, &wtime, <))

wtime = t2;

/* update the kernel routing table

*/

timevalsub(&t2, &need_kern, &now);

if (t2.tv_sec <= 0) {

age(0);

continue;

}

if (timercmp(&t2, &wtime, <))

wtime = t2;

/* take care of router discovery,

* but do it to the millisecond

*/

if (!timercmp(&rdisc_timer, &now, >)) {

rdisc_age(0);

continue;

}

timevalsub(&t2, &rdisc_timer, &now);

if (timercmp(&t2, &wtime, <))

wtime = t2;

/* wait for input or a timer to expire.

*/

trace_flush();

ibits = fdbits;

n = select(sock_max, &ibits, 0, 0, &wtime);