allow to access the registered callbacks for a given filedescriptor

TODO : extend the api to allow dynamic set/unset of callbacks

also bumped up the default write buffer

TODO : make it configurable

src/iomux.c

@@ -36,7 +36,7 @@
 #include "iomux.h"
 
 #define IOMUX_CONNECTIONS_MAX 65535
-#define IOMUX_CONNECTION_BUFSIZE 16384
+#define IOMUX_CONNECTION_BUFSIZE 65535
 #define IOMUX_CONNECTION_SERVER (1)
 
 int iomux_hangup = 0;
@@ -877,3 +877,10 @@ iomux_isempty(iomux_t *iomux)
     }
     return 1;
 }
+
+iomux_callbacks_t *iomux_callbacks(iomux_t *iomux, int fd)
+{
+    if (iomux->connections[fd])
+        return &iomux->connections[fd]->cbs;
+    return NULL;
+}

src/iomux.h

@@ -213,6 +213,8 @@ void iomux_destroy(iomux_t *iomux);
  */
 int iomux_isempty(iomux_t *iomux);
 
+iomux_callbacks_t *iomux_callbacks(iomux_t *iomux, int fd);
+
 #ifdef __cplusplus
 }
 #endif