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only compare pollitem.fd if pollitem.socket is NULL

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item.fd should be ignored if item.socket is defined.

Failing to check .socket could cause false-matches, raising EINVAL in zmq_poller_modify_fd.
This commit is contained in:
Min RK 2016-11-21 11:47:50 +01:00
parent 185fed3966
commit f302d8a7b6
1 changed files with 4 additions and 4 deletions
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8
src/zmq.cpp
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@ -793,7 +793,7 @@ inline int zmq_poller_poll (zmq_pollitem_t *items_, int nitems_, long timeout_)
// Poll item is a raw file descriptor.
for (int j = 0; j < i; ++j) {
// Check for repeat entries
if (items_[j].fd == items_[i].fd) {
if (!items_[j].socket && items_[j].fd == items_[i].fd) {
repeat_items = true;
modify = true;
e |= items_[j].events;
@ -825,8 +825,8 @@ inline int zmq_poller_poll (zmq_pollitem_t *items_, int nitems_, long timeout_)
// Transform poller events into zmq_pollitem events.
// items_ contains all items, while events only contains fired events.
// If no sockets are repeated (likely), the two are still co-ordered, so the step through items
// Checking for matches only on the first event.
// If no sockets are repeated (likely), the two are still co-ordered, so step through the items
// checking for matches only on the first event.
// If there are repeat items, they cannot be assumed to be co-ordered,
// so each pollitem must check fired events from the beginning.
int j_start = 0, found_events = rc;
@ -834,7 +834,7 @@ inline int zmq_poller_poll (zmq_pollitem_t *items_, int nitems_, long timeout_)
for (int j = j_start; j < found_events; ++j) {
if (
(items_[i].socket && items_[i].socket == events[j].socket) ||
(items_[i].fd && items_[i].fd == events[j].fd)
(!(items_[i].socket || items_[j].socket) && items_[i].fd == events[j].fd)
) {
items_[i].revents = events[j].events & items_[i].events;
if (!repeat_items) {