0MQ/2.1 wire format compatibility implemented

- XS_PROTOCOL option added
- libxs ignores when unused flags are set to 1 (0MQ/2.1 bug)
- compatibility tests added

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/decoder.cpp b/src/decoder.cpp
index 23546f1..dc8e54e 100644
--- a/src/decoder.cpp
+++ b/src/decoder.cpp
@@ -126,7 +126,7 @@ bool xs::decoder_t::eight_byte_size_ready ()
 bool xs::decoder_t::flags_ready ()
 {
     //  Store the flags from the wire into the message structure.
-    in_progress.set_flags (tmpbuf [0]);
+    in_progress.set_flags (tmpbuf [0] & 0x01);
 
     next_step (in_progress.data (), in_progress.size (),
         &decoder_t::message_ready);