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| author | Arne Schwabe | 2022-11-09 16:48:09 +0100 |
|---|---|---|
| committer | Gert Doering | 2022-11-14 11:53:34 +0100 |
| commit | 01aed6a5df193a09d8d3c28c5a1580241e0a5e05 (patch) | |
| tree | d85c616e2153654bfa7c1caf4eae339f320e5567 /doc | |
| parent | 115559aa34c0ae20ba5628e8becf09af990fc97f (diff) | |
| download | openvpn-01aed6a5df193a09d8d3c28c5a1580241e0a5e05.zip openvpn-01aed6a5df193a09d8d3c28c5a1580241e0a5e05.tar.gz | |
Allow tun-mtu to be pushed
This allows tun-mtu to pushed but only up to the size of the preallocated
buffers. This is not a perfect solution but should allow most of the use
cases where the mtu is close enough to 1500 (or smaller).
Signed-off-by: Arne Schwabe <arne@rfc2549.org>
Patch v4: rebase for check_session_cipher name change
Patch v5: remove mention of change of default mtu, remove leftover code
from an earlier approach.
Signed-off-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20221109154810.1268403-1-arne@rfc2549.org>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg25498.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/man-sections/client-options.rst | 4 | ||||
| -rw-r--r-- | doc/man-sections/vpn-network-options.rst | 6 |
2 files changed, 10 insertions, 0 deletions
diff --git a/doc/man-sections/client-options.rst b/doc/man-sections/client-options.rst index 5a90689..0765147 100644 --- a/doc/man-sections/client-options.rst +++ b/doc/man-sections/client-options.rst @@ -363,6 +363,10 @@ configuration. The client announces the list of supported ciphers configured with the ``--data-ciphers`` option to the server. + :code:`IV_MTU=<max_mtu>` + The client announces the support of pushable MTU and the maximum MTU + it is willing to accept. + :code:`IV_GUI_VER=<gui_id> <version>` The UI version of a UI if one is running, for example :code:`de.blinkt.openvpn 0.5.47` for the Android app. diff --git a/doc/man-sections/vpn-network-options.rst b/doc/man-sections/vpn-network-options.rst index 72cf906..4b2c4a7 100644 --- a/doc/man-sections/vpn-network-options.rst +++ b/doc/man-sections/vpn-network-options.rst @@ -540,6 +540,12 @@ routing. It's best to use the ``--fragment`` and/or ``--mssfix`` options to deal with MTU sizing issues. +--tun-max-mtu maxmtu + This configures the maximum MTU size that a server can push to ``maxmtu``, + by configuring the internal buffers to allow at least this packet size. + The default for ``maxmtu`` is 1600. Currently, only increasing beyond 1600 + is possible, and attempting to reduce max-mtu below 1600 will be ignored. + --tun-mtu-extra n Assume that the TUN/TAP device might return as many as ``n`` bytes more than the ``--tun-mtu`` size on read. This parameter defaults to 0, which |