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Problem: commit afb24b53 broke ZMQ_STREAM contract

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Symptom is that ZMQ_STREAM sockets in 4.1.0 and 4.1.1 generate zero
sized messages on each new connection, unlike 4.0.x which did not do
this.

Person who made this commit also changed test cases so that contract
breakage did not show. Same person was later banned for persistently
poor form in CZMQ contributions.

Solution: enable connect notifications on ZMQ_STREAM sockets using a
new ZMQ_STREAM_NOTIFY setting. By default, socket does not deliver
notifications, and behaves as in 4.0.x.

Fixes #1316
This commit is contained in:
Pieter Hintjens
2015-01-23 15:25:40 +01:00
parent 94d9a4ffdf
commit 6ced7027a0
13 changed files with 73 additions and 37 deletions
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12
src/stream.cpp
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@@ -33,7 +33,7 @@ zmq::stream_t::stream_t (class ctx_t *parent_, uint32_t tid_, int sid_) :
next_rid (generate_random ())
{
options.type = ZMQ_STREAM;
options.raw_sock = true;
options.raw_socket = true;
prefetched_id.init ();
prefetched_msg.init ();
@@ -167,6 +167,8 @@ int zmq::stream_t::xsend (msg_t *msg_)
int zmq::stream_t::xsetsockopt (int option_, const void *optval_,
size_t optvallen_)
{
bool is_int = (optvallen_ == sizeof (int));
int value = is_int? *((int *) optval_): 0;
switch (option_) {
case ZMQ_CONNECT_RID:
if (optval_ && optvallen_) {
@@ -174,6 +176,14 @@ int zmq::stream_t::xsetsockopt (int option_, const void *optval_,
return 0;
}
break;
case ZMQ_STREAM_NOTIFY:
if (is_int && (value == 0 || value == 1)) {
options.raw_notify = value;
return 0;
}
break;
default:
break;
}