Use vlib_node_add_next(...) to create the graph arc at your convenience.
Memorize the arc index when you create it, so you can set e.g. next0 to the
correct value in MyNode.
HTH... Dave
-----Original Message-----
From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of Prashant Upadhyaya
Sent: Wednesday, October 24, 2018 2:15 AM
To: vpp-dev@lists.fd.io
Subject: [vpp-dev] Regarding VLIB_REGISTER_NODE
Hi,
I have a registered node like the following --
VLIB_REGISTER_NODE (MyNode) = {
.name = "MyNode",
.
.
.n_next_nodes =N,
.next_nodes = {
[firstone] = "error-drop",
[secondone] = "ip4-lookup",
[thirdone] = "ip6-lookup",
[fourthone] = "may-or-may-not-be-loaded-node",
.
.
Now I want to be able to run the system whether the fourth one above is loaded
or not as a .so The business logic in my code takes care that I never use the
fourth one in case it is not loaded. I have a private configuration which tells
me whether the fourth one is present in deployment or not.
But the VLIB_REGISTER_NODE requires the wiring at compile time like the above.
And the system will not startup if the fourth one is not actually present in
deployment
So I want to avoid mentioning the fourth one in the VLIB_REGISTER_NODE of
MyNode as one of the next_nodes.
And then how to add it as one of the next_nodes from runtime for MyNode when my
private configuration tells me that the fourthone indeed is existing in the
deployment ? I am looking for some API to wink in the fourth one at runtime
into .next_nodes of MyNode.
Regards
-Prashant
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