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Merge pull request #502 from ianbarber/master

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Add bounds check on upstream XSUB messages
This commit is contained in:
Pieter Hintjens 2013-01-21 21:18:08 -08:00
commit 7bc3e53b53
1 changed files with 2 additions and 2 deletions
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4
src/xsub.cpp
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@ -87,7 +87,7 @@ int zmq::xsub_t::xsend (msg_t *msg_)
size_t size = msg_->size ();
unsigned char *data = (unsigned char*) msg_->data ();
if (*data == 1) {
if (size > 0 && *data == 1) {
// Process subscribe message
// This used to filter out duplicate subscriptions,
// however this is alread done on the XPUB side and
@ -97,7 +97,7 @@ int zmq::xsub_t::xsend (msg_t *msg_)
return dist.send_to_all (msg_);
}
else
if (*data == 0) {
if (size > 0 && *data == 0) {
// Process unsubscribe message
if (subscriptions.rm (data + 1, size - 1))
return dist.send_to_all (msg_);