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Diffstat (limited to 'src/network/kernel/qnetworkinterface.cpp')
| -rw-r--r-- | src/network/kernel/qnetworkinterface.cpp | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/network/kernel/qnetworkinterface.cpp b/src/network/kernel/qnetworkinterface.cpp index ec58fa65c0..3fb0dc80ee 100644 --- a/src/network/kernel/qnetworkinterface.cpp +++ b/src/network/kernel/qnetworkinterface.cpp @@ -689,6 +689,29 @@ int QNetworkInterface::index() const } /*! + \since 5.11 + + Returns the maximum transmission unit on this interface, if known, or 0 + otherwise. + + The maximum transmission unit is the largest packet that may be sent on + this interface without incurring link-level fragmentation. Applications may + use this value to calculate the size of the payload that will fit an + unfragmented UDP datagram. Remember to subtract the sizes of headers used + in your communication over the interface, e.g. TCP (20 bytes) or UDP (12), + IPv4 (20) or IPv6 (40, absent some form of header compression), when + computing how big a payload you can transmit. Also note that the MTU along + the full path (the Path MTU) to the destination may be smaller than the + interface's MTU. + + \sa QUdpSocket +*/ +int QNetworkInterface::maxTransmissionUnit() const +{ + return d ? d->mtu : 0; +} + +/*! Returns the name of this network interface. On Unix systems, this is a string containing the type of the interface and optionally a sequence number, such as "eth0", "lo" or "pcn0". On Windows, it's |