[PATCH] mbuf: add ESP packet type

[Morten Brørup]

> From: Alexander Kozyrev [mailto:akozyrev at nvidia.com]
> Sent: Thursday, 10 August 2023 17.54
> 
> Support the IP Encapsulating Security Payload (ESP) in transport mode.
> 
> Signed-off-by: Alexander Kozyrev <akozyrev at nvidia.com>
> ---
>  lib/mbuf/rte_mbuf_ptype.h | 23 +++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
> 
> diff --git a/lib/mbuf/rte_mbuf_ptype.h b/lib/mbuf/rte_mbuf_ptype.h
> index 17a2dd3576..7cb7ddddda 100644
> --- a/lib/mbuf/rte_mbuf_ptype.h
> +++ b/lib/mbuf/rte_mbuf_ptype.h
> @@ -308,6 +308,17 @@ extern "C" {
>   * | 'version'=4, 'protocol'=2, 'MF'=0, 'frag_offset'=0>
>   */
>  #define RTE_PTYPE_L4_IGMP                   0x00000700
> +/**
> + * ESP (IP Encapsulating Security Payload) transport packet type.
> + *
> + * Packet format:
> + * <'ether type'=0x0800
> + * | 'version'=4, 'protocol'=50>

Non-fragment criteria seems to be missing:

* | 'version'=4, 'protocol'=50, 'MF'=0, 'frag_offset'=0>

> + * or,
> + * <'ether type'=0x86DD
> + * | 'version'=6, 'next header'=50>
> + */
> +#define RTE_PTYPE_L4_ESP                    0x00000800
>  /**
>   * Mask of layer 4 packet types.
>   * It is used for outer packet for tunneling cases.
> @@ -658,6 +669,18 @@ extern "C" {
>   * | 'version'=6, 'next header'!=[6|17|44|132|1]>
>   */
>  #define RTE_PTYPE_INNER_L4_NONFRAG          0x06000000
> +/**
> + * ESP (IP Encapsulating Security Payload) transport packet type.
> + * It is used for inner packet only.
> + *
> + * Packet format (inner only):
> + * <'ether type'=0x0800
> + * | 'version'=4, 'protocol'=50>

Also missing here:
* | 'version'=4, 'protocol'=50, 'MF'=0, 'frag_offset'=0>

> + * or,
> + * <'ether type'=0x86DD
> + * | 'version'=6, 'next header'=50>
> + */
> +#define RTE_PTYPE_INNER_L4_ESP              0x08000000
>  /**
>   * Mask of inner layer 4 packet types.
>   */
> --
> 2.18.2