Hi, In our UPF plugin [1], I need to terminate a TCP connection with a non-local destination IP *and* pass metadata from the plugin into the session.
I have solve this for the moment with some very ugly hacks. Florin Coras has rightly criticise those hacks in earlier version of the plugin, but I have not found a clean solution, yet. The UPF plugin is basically a per session mini router instance (that wasn't my idea, that is the way the specifications are written). It detects a TCP connection that it needs to handle with rules that are unique for a given session and then has to apply rules that are also unique per session to that TCP connection. For the moment only HTTP with redirect rules are handled (your normal captive portal use case). What I need to do is: a) detect the UPF session and the TCP connection in a packet forwarding graph node and create a TCP session from it. The destination IP will not be local, so the normal local input does not work. b) pass metadata (the matched session and rule) into the TCP connection. a) is somewhat doable, but passing metadata from the detection node into the session proves challenging (without reimplementing all of the TCP input node). There are no fields (except for IP headers) that are passed from the vnet buffer into the TCP connection. Any hints or ideas? Regards, Andreas [1]: https://gerrit.fd.io/r/c/vpp/+/15798 -- Andreas Schultz -- Principal Engineer t: +49 391 819099-224 ------------------------------- enabling your networks ----------------------------- Travelping GmbH Roentgenstraße 13 39108 Magdeburg Germany t: +49 391 819099-0 f: +49 391 819099-299 e: i...@travelping.com w: https://www.travelping.com/ Company registration: Amtsgericht Stendal Geschaeftsfuehrer: Holger Winkelmann Reg. No.: HRB 10578 VAT ID: DE236673780
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