Separate subscription forwarding from SUB-side filtering

- subscription forwarding is handled by XSUB socket
- filtering is handled by SUB sockets
- subscriptions are decoupled from filter engines
- filter doesn't have to be able to enumarate the subscriptions
  (no sf_enumerate function)

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

1 files changed, 1 insertions, 4 deletions

diff --git a/src/options.hpp b/src/options.hpp
index 1288f72..fac6084 100644
--- a/src/options.hpp
+++ b/src/options.hpp
@@ -96,7 +96,7 @@ namespace xs
         int protocol;
 
         //  Filter ID to be used with subscriptions and unsubscriptions.
-        int filter_id;
+        int filter;
 
         //  If true, session reads all the pending messages from the pipe and
         //  sends them to the network when socket is closed.
@@ -106,9 +106,6 @@ namespace xs
         //  them to the user when the peer terminates.
         bool delay_on_disconnect;
 
-        //  If 1, (X)SUB socket should filter the messages. If 0, it should not.
-        bool filter;
-
         //  Sends identity to all new connections.
         bool send_identity;