[Openvpn-devel] [PATCH] Restore functionality of route-gateway's dhcp parameter

[James B. <ja...@sp...>]

This patch restores functionality of route-gateway's dhcp parameter, and expands it to support routes using vpn_gateway.

OpenVPN supports using a “dhcp” parameter for the "route-gateway” option, which involves intercepting the DHCP reply packet and extracting the gateway to use. However, the current implementation expects to have this information at the time of the initialisation of the route list, which will not happen, and so routes relying on this option are never added.

Rather than moving initialisation of the route list until after the route-delay (which can have a negative effect on the resolution of routes using FQDNs), this patch flags routes that require a DHCP gateway, and updates and defines them when a DHCP reply is received. If no reply is received in time, the routes are left undefined.

Currently in production use in Viscosity for macOS and Windows, no reported issues.

Signed-off-by: James Bekkema <ja...@sp...>

Thanks,
James

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James Bekkema
SparkLabs Developer
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