Handle array response in parallell with pubsub using RESP3 (#1014)

RESP3 allows sending commands in parallell with pubsub handling
and these commands might get responded with a REDIS_REPLY_ARRAY.
This conflicts with the pubsub response handling for RESP2 and
results in a faulty state when using RESP3.

Add functionality to keep track of PUSH/RESP3 support on the connection
and only expect the message type REDIS_REPLY_PUSH as subscribe messages
when once seen.

1 files changed, 3 insertions, 0 deletions

diff --git a/hiredis.h b/hiredis.h
index a093abe..7dd44ee 100644
--- a/hiredis.h
+++ b/hiredis.h
@@ -80,6 +80,9 @@ typedef long long ssize_t;
 /* Flag that is set when we should set SO_REUSEADDR before calling bind() */
 #define REDIS_REUSEADDR 0x80
 
+/* Flag that is set when the async connection supports push replies. */
+#define REDIS_SUPPORTS_PUSH 0x100
+
 /**
  * Flag that indicates the user does not want the context to
  * be automatically freed upon error