psp: provide encapsulation helper for drivers

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Create a new function psp_encapsulate(), which takes a TCP packet and
PSP encapsulates it according to the "Transport Mode Packet Format"
section of the PSP Architecture Specification.

psp_encapsulate() does not push a PSP trailer onto the skb. Both IPv6
and IPv4 are supported. Virtualization cookie is not included.

Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Raed Salem <raeds@nvidia.com>
Signed-off-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Signed-off-by: Cosmin Ratiu <cratiu@nvidia.com>
Co-developed-by: Daniel Zahka <daniel.zahka@gmail.com>
Signed-off-by: Daniel Zahka <daniel.zahka@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20250917000954.859376-14-daniel.zahka@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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Raed Salem 2025-09-16 17:09:40 -07:00 • committed by Paolo Abeni

parent af2196f494

commit fc72451574

3 changed files with 69 additions and 0 deletions

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2

include/net/psp/functions.h

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2

include/net/psp/types.h

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65

net/psp/psp_main.c

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