void demo_init()
{
ifs_init();
zoomer_init();
mosaic_init();
slides_init();
part=3;
}
int main(void)
{
//initialize_memory();
DEBUG_INIT();
#if ! defined(USE_SCHEDULE)
bus_init();
ifs_init();
#endif /* USE_SCHEDULE */
ttpa_setstate(TTPA_STATE_UNSYNC);
while(1) {
#if defined(USE_SCHEDULE)
schedule();
#endif
}
return 0;
}
/*
* if_output: Queue packet into an output queue.
* There are 2 output queue's, if_fastq and if_batchq.
* Each output queue is a doubly linked list of double linked lists
* of mbufs, each list belonging to one "session" (socket). This
* way, we can output packets fairly by sending one packet from each
* session, instead of all the packets from one session, then all packets
* from the next session, etc. Packets on the if_fastq get absolute
* priority, but if one session hogs the link, it gets "downgraded"
* to the batchq until it runs out of packets, then it'll return
* to the fastq (eg. if the user does an ls -alR in a telnet session,
* it'll temporarily get downgraded to the batchq)
*/
void
if_output(struct socket *so, struct mbuf *ifm)
{
Slirp *slirp = ifm->slirp;
struct mbuf *ifq;
int on_fastq = 1;
DEBUG_CALL("if_output");
DEBUG_ARG("so = %lx", (long)so);
DEBUG_ARG("ifm = %lx", (long)ifm);
/*
* First remove the mbuf from m_usedlist,
* since we're gonna use m_next and m_prev ourselves
* XXX Shouldn't need this, gotta change dtom() etc.
*/
if (ifm->m_flags & M_USEDLIST) {
remque(ifm);
ifm->m_flags &= ~M_USEDLIST;
}
/*
* See if there's already a batchq list for this session.
* This can include an interactive session, which should go on fastq,
* but gets too greedy... hence it'll be downgraded from fastq to batchq.
* We mustn't put this packet back on the fastq (or we'll send it out of order)
* XXX add cache here?
*/
for (ifq = slirp->if_batchq.ifq_prev; ifq && ifq != &slirp->if_batchq;
ifq = ifq->ifq_prev) {
if (so == ifq->ifq_so) {
/* A match! */
ifm->ifq_so = so;
ifs_insque(ifm, ifq->ifs_prev);
goto diddit;
}
}
/* No match, check which queue to put it on */
if (so && (so->so_iptos & IPTOS_LOWDELAY)) {
ifq = slirp->if_fastq.ifq_prev;
on_fastq = 1;
/*
* Check if this packet is a part of the last
* packet's session
*/
if (ifq->ifq_so == so) {
ifm->ifq_so = so;
ifs_insque(ifm, ifq->ifs_prev);
goto diddit;
}
} else {
ifq = slirp->if_batchq.ifq_prev;
/* Set next_m if the queue was empty so far */
if (slirp->next_m == &slirp->if_batchq) {
slirp->next_m = ifm;
}
}
/* Create a new doubly linked list for this session */
ifm->ifq_so = so;
ifs_init(ifm);
insque(ifm, ifq);
diddit:
if (so) {
/* Update *_queued */
so->so_queued++;
so->so_nqueued++;
/*
* Check if the interactive session should be downgraded to
* the batchq. A session is downgraded if it has queued 6
* packets without pausing, and at least 3 of those packets
* have been sent over the link
* (XXX These are arbitrary numbers, probably not optimal..)
*/
if (on_fastq && ((so->so_nqueued >= 6) &&
(so->so_nqueued - so->so_queued) >= 3)) {
/* Remove from current queue... */
remque(ifm->ifs_next);
/* ...And insert in the new. That'll teach ya! */
insque(ifm->ifs_next, &slirp->if_batchq);
}
}
#ifndef FULL_BOLT
/*
* This prevents us from malloc()ing too many mbufs
*/
if_start(ifm->slirp);
#endif
}
