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| author | Gert Doering <gert@greenie.muc.de> | 2015-02-08 11:18:45 +0100 |
|---|---|---|
| committer | Gert Doering <gert@greenie.muc.de> | 2015-02-15 19:14:20 +0100 |
| commit | 9e0963c11aa439deb382d7d6bc40b6ade999401c (patch) | |
| tree | 681e6828bfb83638388befaac8e162d9da99b4d5 /src/openvpn/mtu.h | |
| parent | 5d5233778868ddd568140c394adfcfc8e3453245 (diff) | |
| download | openvpn-9e0963c11aa439deb382d7d6bc40b6ade999401c.tar.gz openvpn-9e0963c11aa439deb382d7d6bc40b6ade999401c.tar.xz openvpn-9e0963c11aa439deb382d7d6bc40b6ade999401c.zip | |
New approach to handle peer-id related changes to link-mtu.
Instead of statically increasing link-mtu by +3, keep the old value for
OCC compatibility with old servers/clients, and only increase link-mtu
if peer-id option is enabled (right now: is pushed by server).
If link-mtu has been set in the config, keep configured value, and log
warning (because the extra overhead has to decrease tun-mtu).
Reserve extra +3 bytes in frame->extra_link.
v2: use frame->extra_link, not frame->extra_buffer (receive path on server)
introduce frame_add_to_link_mtu() to manipulate frame->link_mtu value
rework comments to make more clear what is happening
This reverts commit f95010ad247a8998e0c39e394236251fca316849.
Signed-off-by: Gert Doering <gert@greenie.muc.de>
Acked-by: Arne Schwabe <arne@rfc2549.org>
Message-Id: <1423390725-13438-1-git-send-email-gert@greenie.muc.de>
URL: http://article.gmane.org/gmane.network.openvpn.devel/9450
Diffstat (limited to 'src/openvpn/mtu.h')
| -rw-r--r-- | src/openvpn/mtu.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/openvpn/mtu.h b/src/openvpn/mtu.h index 29ec21f..bccd681 100644 --- a/src/openvpn/mtu.h +++ b/src/openvpn/mtu.h @@ -258,6 +258,12 @@ frame_headroom (const struct frame *f, const unsigned int flag_mask) */ static inline void +frame_add_to_link_mtu (struct frame *frame, const int increment) +{ + frame->link_mtu += increment; +} + +static inline void frame_add_to_extra_frame (struct frame *frame, const int increment) { frame->extra_frame += increment; |