static void process_timeout_event(struct state *s, time_t now)
{
int ret = 0;
/*
* Is the link up? If not, try again in 1 second.
*/
if (!netdev_running(s->dev)) {
s->expire = now + 1;
s->state = s->restart_state;
return;
}
/*
* If we had an error, restore a sane state to
* restart from.
*/
if (s->state == DEVST_ERROR)
s->state = s->restart_state;
/*
* Now send a packet depending on our state.
*/
switch (s->state) {
case DEVST_BOOTP:
ret = bootp_send_request(s->dev);
s->restart_state = DEVST_BOOTP;
break;
case DEVST_DHCPDISC:
ret = dhcp_send_discover(s->dev);
s->restart_state = DEVST_DHCPDISC;
break;
case DEVST_DHCPREQ:
ret = dhcp_send_request(s->dev);
s->restart_state = DEVST_DHCPDISC;
break;
}
if (ret == -1) {
s->state = DEVST_ERROR;
s->expire = now + 10;
} else {
s->expire = now + s->retry_period;
s->retry_period *= 2;
if (s->retry_period > 60)
s->retry_period = 60;
}
}
void
bootp_net_main(void)
{
if(uip_newdata())
bootp_handle_reply();
if(! uip_udp_conn->appstate.bootp.retry_timer) {
bootp_send_request();
if(uip_udp_conn->appstate.bootp.retry_counter < 5)
uip_udp_conn->appstate.bootp.retry_timer =
2 << (++ uip_udp_conn->appstate.bootp.retry_counter);
else
uip_udp_conn->appstate.bootp.retry_timer = 64 + (rand() & 63);
}
else
uip_udp_conn->appstate.bootp.retry_timer --;
}
