moved statistics classes from NetEmu to SENF

[senf.git] / Socket / Protocols / BSDSocketAddress.hh

diff --git a/Socket/Protocols/BSDSocketAddress.hh b/Socket/Protocols/BSDSocketAddress.hh
index 1e7d1e7..ec3edfd 100644 (file)
--- a/Socket/Protocols/BSDSocketAddress.hh
+++ b/Socket/Protocols/BSDSocketAddress.hh
@@ -23,10 +23,12 @@
 /** \file
     \brief BSDSocketAddress public header */
 
-#ifndef HH_BSDSocketAddress_
-#define HH_BSDSocketAddress_ 1
+#ifndef HH_SENF_Socket_Protocols_BSDSocketAddress_
+#define HH_SENF_Socket_Protocols_BSDSocketAddress_ 1
 
 // Custom includes
+#include <boost/type_traits/alignment_of.hpp>
+#include <boost/type_traits/type_with_alignment.hpp>
 #include "../../Utils/safe_bool.hh"
 #include <sys/socket.h>
 #include <iostream>
@@ -112,8 +114,16 @@ namespace senf {
         void socklen(socklen_t len);
 
     private:
-
-        socklen_t len_;
+        
+        // The following incantation is needed to fix the alignment of the sockaddr data members
+        // which will be added by the derived classes later: The alignment must be forced
+        // to coincide with the struct sockaddr_storage alignment (which must have the largest
+        // alignment of all sockaddr types).
+        union {
+            socklen_t len_;
+            boost::type_with_alignment<boost::alignment_of<struct sockaddr_storage>::value> a_;
+            char _b[boost::alignment_of<struct sockaddr_storage>::value];
+        };
     };
 
     /** \brief Safe socket address down-cast