From aaa187cd9951b71127c11c375e6a3954a187e1d3 Mon Sep 17 00:00:00 2001 From: Thiago Macieira Date: Sun, 20 Aug 2017 15:50:41 -0700 Subject: QAbstractSocket: Add socketOption for the Path MTU This allow retrieving the value of the known PMTU for the current socket. This works on Linux (IPv6 and IPv4) and FreeBSD (IPv6 only) -- the other OSes don't have the necessary API. Note: do we need add IP_MTU_DISCOVER? Change-Id: I6e9274c1e7444ad48c81fffd14dcaf97a18ce335 Reviewed-by: Edward Welbourne --- src/network/socket/qabstractsocket.cpp | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'src/network/socket/qabstractsocket.cpp') diff --git a/src/network/socket/qabstractsocket.cpp b/src/network/socket/qabstractsocket.cpp index 6d47540b75..98baa0c047 100644 --- a/src/network/socket/qabstractsocket.cpp +++ b/src/network/socket/qabstractsocket.cpp @@ -387,6 +387,11 @@ (see \l{QAbstractSocket::}{setReadBufferSize()}). This enum value has been introduced in Qt 5.3. + \value PathMtuSocketOption Retrieves the Path Maximum Transmission Unit + (PMTU) value currently known by the IP stack, if any. Some IP stacks also + allow setting the MTU for transmission. + This enum value was introduced in Qt 5.11. + Possible values for \e{TypeOfServiceOption} are: \table @@ -2023,6 +2028,10 @@ void QAbstractSocket::setSocketOption(QAbstractSocket::SocketOption option, cons case ReceiveBufferSizeSocketOption: d_func()->socketEngine->setOption(QAbstractSocketEngine::ReceiveBufferSocketOption, value.toInt()); break; + + case PathMtuSocketOption: + d_func()->socketEngine->setOption(QAbstractSocketEngine::PathMtuInformation, value.toInt()); + break; } } @@ -2065,6 +2074,10 @@ QVariant QAbstractSocket::socketOption(QAbstractSocket::SocketOption option) case ReceiveBufferSizeSocketOption: ret = d_func()->socketEngine->option(QAbstractSocketEngine::ReceiveBufferSocketOption); break; + + case PathMtuSocketOption: + ret = d_func()->socketEngine->option(QAbstractSocketEngine::PathMtuInformation); + break; } if (ret == -1) return QVariant(); -- cgit v1.2.3