/*
* Tcp protocol timeout routine called every 500 ms.
* Updates the timers in all active tcb's and
* causes finite state machine actions if timers expire.
*/
void
tcp_slowtimo()
{
register struct inpcb *ip, *ipnxt;
register struct tcpcb *tp;
int s;
register long i;
s = splsoftnet();
tcp_maxidle = TCPTV_KEEPCNT * tcp_keepintvl;
/*
* Search through tcb's and update active timers.
*/
ip = tcbtable.inpt_queue.cqh_first;
if (ip == (struct inpcb *)0) { /* XXX */
splx(s);
return;
}
for (; ip != (struct inpcb *)&tcbtable.inpt_queue; ip = ipnxt) {
ipnxt = ip->inp_queue.cqe_next;
tp = intotcpcb(ip);
if (tp == 0 || tp->t_state == TCPS_LISTEN)
continue;
for (i = 0; i < TCPT_NTIMERS; i++) {
if (tp->t_timer[i] && --tp->t_timer[i] == 0) {
(void) tcp_usrreq(tp->t_inpcb->inp_socket,
PRU_SLOWTIMO, (struct mbuf *)0,
(struct mbuf *)i, (struct mbuf *)0);
/* XXX NOT MP SAFE */
if ((ipnxt == (void *)&tcbtable.inpt_queue &&
tcbtable.inpt_queue.cqh_last != ip) ||
ipnxt->inp_queue.cqe_prev != ip)
goto tpgone;
}
}
tp->t_idle++;
if (tp->t_rtt)
tp->t_rtt++;
tpgone:
;
}
#ifdef TCP_COMPAT_42
tcp_iss += TCP_ISSINCR/PR_SLOWHZ; /* increment iss */
if ((int)tcp_iss < 0)
tcp_iss = 0; /* XXX */
#else /* TCP_COMPAT_42 */
tcp_iss += arc4random() % (2 * TCP_ISSINCR / PR_SLOWHZ) + 1; /* increment iss */
#endif /* !TCP_COMPAT_42 */
tcp_now++; /* for timestamps */
splx(s);
}
/*
* Tcp protocol timeout routine called every 500 ms.
* Updates the timers in all active tcb's and
* causes finite state machine actions if timers expire.
*/
void
tcp_slowtimo()
{
struct inpcb *ip, *ipnxt;
struct tcpcb *tp;
//int s = splnet();
u_long i;
//tcp_maxidle = tcp_keepcnt * tcp_keepintvl;
/*
* Search through tcb's and update active timers.
*/
ip = g_tcb.inp_next;
if (ip == 0) {
//splx(s);
goto update;
return;
}
for (; ip != &g_tcb; ip = ipnxt) {
ipnxt = ip->inp_next;
tp = intotcpcb(ip);
if (tp == 0 || tp->t_state == TCPS_LISTEN)
continue;
for (i = 0; i < TCPT_NTIMERS; i++) {
if (tp->t_timer[i] && --tp->t_timer[i] == 0) {
(void) tcp_usrreq(tp->t_inpcb->inp_socket,
PRU_SLOWTIMO, (usn_mbuf_t *)0,
(usn_mbuf_t *)i, (usn_mbuf_t *)0);
if (ipnxt->inp_prev != ip)
goto tpgone;
}
}
tp->t_idle++;
if (tp->t_rtt)
tp->t_rtt++;
tpgone:
;
}
update:
g_tcp_iss += TCP_ISSINCR/PR_SLOWHZ; /* increment iss */
#ifdef TCP_COMPAT_42
if ((int)tcp_iss < 0)
g_tcp_iss = TCP_ISSINCR; /* XXX */
#endif
g_tcp_now++; /* for timestamps */
//splx(s);
}
/*
* Tcp protocol timeout routine called every 500 ms.
* Updates the timers in all active tcb's and
* causes finite state machine actions if timers expire.
*/
tcp_slowtimo()
{
register struct inpcb *ip, *ipnxt;
register struct tcpcb *tp;
int s = splnet();
register int i;
/*
* Search through tcb's and update active timers.
*/
ip = tcb.inp_next;
if (ip == 0) {
splx(s);
return;
}
for (; ip != &tcb; ip = ipnxt) {
ipnxt = ip->inp_next;
tp = intotcpcb(ip);
if (tp == 0)
continue;
for (i = 0; i < TCPT_NTIMERS; i++) {
if (tp->t_timer[i] && --tp->t_timer[i] == 0) {
(void) tcp_usrreq(tp->t_inpcb->inp_socket,
PRU_SLOWTIMO, (struct mbuf *)0,
(struct mbuf *)i, (struct mbuf *)0);
if (ipnxt->inp_prev != ip)
goto tpgone;
}
}
tp->t_idle++;
if (tp->t_rtt)
tp->t_rtt++;
tpgone:
;
}
tcp_iss += TCP_ISSINCR/PR_SLOWHZ; /* increment iss */
#ifdef TCP_COMPAT_42
if ((int)tcp_iss < 0)
tcp_iss = 0; /* XXX */
#endif
splx(s);
}
