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Added the "OpenVPNPushDummyIPv4AddressOnL2Mode" option for the OpenVPN L2 mode.

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To fix the bug of OpenVPN 2.4.6 and particular version of kernel mode TAP driver on Linux, the TAP device must be up after the OpenVPN client is connected. However there is no direct push instruction to do so to OpenVPN client. Therefore we push the dummy IPv4 address (RFC7600) to the OpenVPN client to enforce the TAP driver UP state.
This commit is contained in:
Daiyuu Nobori
2018-12-01 16:20:30 +09:00
parent 08465e3f39
commit 58e2f74f7f
4 changed files with 28 additions and 0 deletions
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13
src/Cedar/Server.c
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@ -5872,6 +5872,17 @@ void SiLoadServerCfg(SERVER *s, FOLDER *f)
}
}
// OpenVPN Push a dummy IPv4 address on L2 mode
if (CfgIsItem(f, "OpenVPNPushDummyIPv4AddressOnL2Mode") == false)
{
// Default enable
c->OpenVPNPushDummyIPv4AddressOnL2Mode = true;
}
else
{
c->OpenVPNPushDummyIPv4AddressOnL2Mode = CfgGetBool(f, "OpenVPNPushDummyIPv4AddressOnL2Mode");
}
// Disable the NAT-traversal feature
s->DisableNatTraversal = CfgGetBool(f, "DisableNatTraversal");
@ -6289,6 +6300,8 @@ void SiWriteServerCfg(FOLDER *f, SERVER *s)
CfgAddStr(f, "OpenVPNDefaultClientOption", c->OpenVPNDefaultClientOption);
CfgAddBool(f, "OpenVPNPushDummyIPv4AddressOnL2Mode", c->OpenVPNPushDummyIPv4AddressOnL2Mode);
if (c->Bridge == false)
{
OPENVPN_SSTP_CONFIG config;