added interface address discovery

1 files changed, 18 insertions, 2 deletions

diff --git a/host/lib/usrp/usrp2/usrp2_impl.cpp b/host/lib/usrp/usrp2/usrp2_impl.cpp
index 85d73e83a..f04ae8d2c 100644
--- a/host/lib/usrp/usrp2/usrp2_impl.cpp
+++ b/host/lib/usrp/usrp2/usrp2_impl.cpp
@@ -15,9 +15,11 @@
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 //
 
+#include <uhd/transport/if_addrs.hpp>
+#include <uhd/utils.hpp>
 #include <boost/format.hpp>
+#include <boost/foreach.hpp>
 #include <boost/bind.hpp>
-#include <uhd/utils.hpp>
 #include <iostream>
 #include "usrp2_impl.hpp"
 
@@ -36,7 +38,21 @@ STATIC_BLOCK(register_usrp2_device){
 uhd::device_addrs_t usrp2::discover(const device_addr_t &hint){
     device_addrs_t usrp2_addrs;
 
-    if (not hint.has_key("addr")) return usrp2_addrs;
+    //if no address was specified, send a broadcast on each interface
+    if (not hint.has_key("addr")){
+        BOOST_FOREACH(const if_addrs_t &if_addrs, get_if_addrs()){
+            //create a new hint with this broadcast address
+            device_addr_t new_hint = hint;
+            new_hint["addr"] = if_addrs.bcast;
+
+            //call discover with the new hint and append results
+            device_addrs_t new_usrp2_addrs = usrp2::discover(new_hint);
+            usrp2_addrs.insert(usrp2_addrs.begin(),
+                new_usrp2_addrs.begin(), new_usrp2_addrs.end()
+            );
+        }
+        return usrp2_addrs;
+    }
 
     //create a udp transport to communicate
     //TODO if an addr is not provided, search all interfaces?