void process_event(mspool *nsp, gh_list *evlist, msevent *nse, int ev) {
int match_r = 0, match_w = 0;
#if HAVE_OPENSSL
int desire_r = 0, desire_w = 0;
#endif
if (nsp->tracelevel > 7)
nsock_trace(nsp, "Processing event %lu", nse->id);
if (!nse->event_done) {
switch(nse->type) {
case NSE_TYPE_CONNECT:
case NSE_TYPE_CONNECT_SSL:
if (ev != EV_NONE)
handle_connect_result(nsp, nse, NSE_STATUS_SUCCESS);
if (!nse->event_done && nse->timeout.tv_sec && !TIMEVAL_AFTER(nse->timeout, nsock_tod))
handle_connect_result(nsp, nse, NSE_STATUS_TIMEOUT);
break;
case NSE_TYPE_READ:
match_r = ev & EV_READ;
match_w = ev & EV_WRITE;
#if HAVE_OPENSSL
desire_r = nse->sslinfo.ssl_desire == SSL_ERROR_WANT_READ;
desire_w = nse->sslinfo.ssl_desire == SSL_ERROR_WANT_WRITE;
if (nse->iod->ssl && ((desire_r && match_r) || (desire_w && match_w)))
handle_read_result(nsp, nse, NSE_STATUS_SUCCESS);
else
#endif
if (!nse->iod->ssl && match_r)
handle_read_result(nsp, nse, NSE_STATUS_SUCCESS);
if (!nse->event_done && nse->timeout.tv_sec && !TIMEVAL_AFTER(nse->timeout, nsock_tod))
handle_read_result(nsp, nse, NSE_STATUS_TIMEOUT);
break;
case NSE_TYPE_WRITE:
match_r = ev & EV_READ;
match_w = ev & EV_WRITE;
#if HAVE_OPENSSL
desire_r = nse->sslinfo.ssl_desire == SSL_ERROR_WANT_READ;
desire_w = nse->sslinfo.ssl_desire == SSL_ERROR_WANT_WRITE;
if (nse->iod->ssl && ((desire_r && match_r) || (desire_w && match_w)))
handle_write_result(nsp, nse, NSE_STATUS_SUCCESS);
else
#endif
if (!nse->iod->ssl && match_w)
handle_write_result(nsp, nse, NSE_STATUS_SUCCESS);
if (!nse->event_done && nse->timeout.tv_sec && !TIMEVAL_AFTER(nse->timeout, nsock_tod))
handle_write_result(nsp, nse, NSE_STATUS_TIMEOUT);
break;
case NSE_TYPE_TIMER:
if (nse->timeout.tv_sec && !TIMEVAL_AFTER(nse->timeout, nsock_tod))
handle_timer_result(nsp, nse, NSE_STATUS_SUCCESS);
break;
#if HAVE_PCAP
case NSE_TYPE_PCAP_READ:{
if (nsp->tracelevel > 5)
nsock_trace(nsp, "PCAP iterating %lu", nse->id);
if (ev & EV_READ) {
/* buffer empty? check it! */
if (FILESPACE_LENGTH(&(nse->iobuf)) == 0)
do_actual_pcap_read(nse);
}
/* if already received smth */
if (FILESPACE_LENGTH(&(nse->iobuf)) > 0)
handle_pcap_read_result(nsp, nse, NSE_STATUS_SUCCESS);
if (!nse->event_done && nse->timeout.tv_sec && !TIMEVAL_AFTER(nse->timeout, nsock_tod))
handle_pcap_read_result(nsp, nse, NSE_STATUS_TIMEOUT);
#if PCAP_BSD_SELECT_HACK
/* If event occurred, and we're in BSD_HACK mode, then this event was added
* to two queues. read_event and pcap_read_event
* Of course we should destroy it only once.
* I assume we're now in read_event, so just unlink this event from
* pcap_read_event */
if (((mspcap *)nse->iod->pcap)->pcap_desc >= 0 && nse->event_done && evlist == &nsp->read_events) {
/* event is done, list is read_events and we're in BSD_HACK mode.
* So unlink event from pcap_read_events */
update_first_events(nse);
gh_list_remove(&nsp->pcap_read_events, nse);
if (nsp->tracelevel > 8)
nsock_trace(nsp, "PCAP NSE #%lu: Removing event from PCAP_READ_EVENTS", nse->id);
}
if (((mspcap *)nse->iod->pcap)->pcap_desc >= 0 && nse->event_done && evlist == &nsp->pcap_read_events) {
update_first_events(nse);
gh_list_remove(&nsp->read_events, nse);
if (nsp->tracelevel > 8)
nsock_trace(nsp, "PCAP NSE #%lu: Removing event from READ_EVENTS", nse->id);
}
#endif
break;
}
#endif
default:
fatal("Event has unknown type (%d)", nse->type);
break; /* unreached */
}
}
if (nse->event_done) {
/* Security sanity check: don't return a functional SSL iod without setting an SSL data structure. */
if (nse->type == NSE_TYPE_CONNECT_SSL && nse->status == NSE_STATUS_SUCCESS)
assert(nse->iod->ssl != NULL);
if (nsp->tracelevel > 8)
nsock_trace(nsp, "NSE #%lu: Sending event", nse->id);
/* WooHoo! The event is ready to be sent */
msevent_dispatch_and_delete(nsp, nse, 1);
} else {
/* Is this event the next-to-timeout? */
if (nse->timeout.tv_sec != 0) {
if (nsp->next_ev.tv_sec == 0)
nsp->next_ev = nse->timeout;
else if (TIMEVAL_AFTER(nsp->next_ev, nse->timeout))
nsp->next_ev = nse->timeout;
}
}
}
/* An internal function for cancelling an event when you already have a pointer
* to the msevent (use nsock_event_cancel if you just have an ID). The
* event_list passed in should correspond to the type of the event. For example,
* with NSE_TYPE_READ, you would pass in &nsp->read_events;. elem is the list
* element in event_list which holds the event. Pass a nonzero for notify if
* you want the program owning the event to be notified that it has been
* cancelled */
int msevent_cancel(mspool *nsp, msevent *nse, gh_list_t *event_list,
gh_lnode_t *elem, int notify) {
if (nse->event_done) {
/* This event has already been marked for death somewhere else -- it will be
* gone soon (and if we try to kill it now all hell will break loose due to
* reentrancy. */
return 0;
}
nsock_log_info(nsp, "msevent_cancel on event #%li (type %s)",
nse->id, nse_type2str(nse->type));
/* Now that we found the event... we go through the motions of cleanly
* cancelling it */
switch (nse->type) {
case NSE_TYPE_CONNECT:
case NSE_TYPE_CONNECT_SSL:
handle_connect_result(nsp, nse, NSE_STATUS_CANCELLED);
break;
case NSE_TYPE_READ:
handle_read_result(nsp, nse, NSE_STATUS_CANCELLED);
break;
case NSE_TYPE_WRITE:
handle_write_result(nsp, nse, NSE_STATUS_CANCELLED);
break;
case NSE_TYPE_TIMER:
handle_timer_result(nsp, nse, NSE_STATUS_CANCELLED);
break;
#if HAVE_PCAP
case NSE_TYPE_PCAP_READ:
handle_pcap_read_result(nsp, nse, NSE_STATUS_CANCELLED);
break;
#endif
default:
fatal("Invalid nsock event type (%d)", nse->type);
}
assert(nse->event_done);
if (nse->timeout.tv_sec)
gh_heap_remove(&nsp->expirables, &nse->expire);
if (event_list) {
update_first_events(nse);
gh_list_remove(event_list, elem);
}
gh_list_append(&nsp->free_events, &nse->nodeq_io);
nsock_log_debug_all(nsp, "NSE #%lu: Removing event from list", nse->id);
#if HAVE_PCAP
#if PCAP_BSD_SELECT_HACK
if (nse->type == NSE_TYPE_PCAP_READ) {
nsock_log_debug_all(nsp, "PCAP NSE #%lu: CANCEL TEST pcap=%p read=%p curr=%p sd=%i",
nse->id, &nsp->pcap_read_events, &nsp->read_events,
event_list,((mspcap *)nse->iod->pcap)->pcap_desc);
/* If event occurred, and we're in BSD_HACK mode, then this event was added to
* two queues. read_event and pcap_read_event Of course we should
* destroy it only once. I assume we're now in read_event, so just unlink
* this event from pcap_read_event */
if (((mspcap *)nse->iod->pcap)->pcap_desc >= 0 && event_list == &nsp->read_events) {
/* event is done, list is read_events and we're in BSD_HACK mode. So unlink
* event from pcap_read_events */
gh_list_remove(&nsp->pcap_read_events, &nse->nodeq_pcap);
nsock_log_debug_all(nsp, "PCAP NSE #%lu: Removing event from PCAP_READ_EVENTS", nse->id);
}
if (((mspcap *)nse->iod->pcap)->pcap_desc >= 0 && event_list == &nsp->pcap_read_events) {
/* event is done, list is read_events and we're in BSD_HACK mode.
* So unlink event from read_events */
gh_list_remove(&nsp->read_events, &nse->nodeq_io);
nsock_log_debug_all(nsp, "PCAP NSE #%lu: Removing event from READ_EVENTS", nse->id);
}
}
#endif
#endif
msevent_dispatch_and_delete(nsp, nse, notify);
return 1;
}
