From b7c5463739e34cf0a8740db4a3bd0d0a030822c7 Mon Sep 17 00:00:00 2001
From: Michael Klishin <michael@rabbitmq.com>
Date: Fri, 1 Aug 2014 10:41:16 +0400
Subject: Enforce server-side value when client provided one is 0

Keeps bogus clients such as node-amqp from ignoring the channel_max
limit.
---
 src/rabbit_reader.erl | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/rabbit_reader.erl b/src/rabbit_reader.erl
index ddaf205e..68cef56a 100644
--- a/src/rabbit_reader.erl
+++ b/src/rabbit_reader.erl
@@ -971,7 +971,8 @@ validate_negotiated_integer_value(Field, Min, ClientValue) ->
     ServerValue = get_env(Field),
     if ClientValue /= 0 andalso ClientValue < Min ->
             fail_negotiation(Field, min, ServerValue, ClientValue);
-       ServerValue /= 0 andalso ClientValue > ServerValue ->
+       ServerValue /= 0 andalso (ClientValue =:= 0 orelse
+                                 ClientValue > ServerValue) ->
             fail_negotiation(Field, max, ServerValue, ClientValue);
        true ->
             ok
-- 
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