Add ToS option to sockets.

Creates a new SocketOption called called TypeOfServiceOption that can be
used with the existing setSocketOption method to set the ToS byte in a
socket socket. This is done only for unix systems because windows
doesn't support directly setting the ToS/DSCP byte:
http://support.microsoft.com/kb/248611
http://blogs.msdn.com/b/wndp/archive/2006/07/05/657196.aspx

Change-Id: Idf9da2dd8307ac7057982fbfdf9e4e9ebe366780
Task-number: QTBUG-6221
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Peter Hartmann <peter.hartmann@nokia.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/network/socket/qnativesocketengine_unix.cpp b/src/network/socket/qnativesocketengine_unix.cpp
index 09aed255d6..c0a55b9a26 100644
--- a/src/network/socket/qnativesocketengine_unix.cpp
+++ b/src/network/socket/qnativesocketengine_unix.cpp
@@ -251,6 +251,12 @@ int QNativeSocketEnginePrivate::option(QNativeSocketEngine::SocketOption opt) co
             n = IP_MULTICAST_LOOP;
         }
         break;
+    case QNativeSocketEngine::TypeOfServiceOption:
+        if (socketProtocol == QAbstractSocket::IPv4Protocol) {
+            level = IPPROTO_IP;
+            n = IP_TOS;
+        }
+        break;
     }
 
     int v = -1;
@@ -352,6 +358,12 @@ bool QNativeSocketEnginePrivate::setOption(QNativeSocketEngine::SocketOption opt
             n = IP_MULTICAST_LOOP;
         }
         break;
+    case QNativeSocketEngine::TypeOfServiceOption:
+        if (socketProtocol == QAbstractSocket::IPv4Protocol) {
+            level = IPPROTO_IP;
+            n = IP_TOS;
+        }
+        break;
     }
 
     return ::setsockopt(socketDescriptor, level, n, (char *) &v, sizeof(v)) == 0;