rte_flow_item_eth(3)

💖 rte_flow_item_eth 💖

okay bestie, gather round, because we're about to talk about rte_flow_item_eth from the DPDK library — yes it's a manpage, yes it's about Ethernet headers, and yes it's giving main character energy. You can find this one in section 3 of the manual (library functions, iykyk).

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🦋 SYNOPSIS 🦋

#include <rte_flow.h>

✨ Data Fields ✨

• uint32_t has_vlan:1
• uint32_t reserved:31

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🌸 Detailed Description 🌸

RTE_FLOW_ITEM_TYPE_ETH — literally what it says on the tin: this matches an Ethernet header. 🎀

Inside the hdr field, the sub-field ether_type stands either for EtherType or TPID, depending on whether the item is followed by a VLAN item or not. And if two VLAN items follow? Then that sub-field refers to the outer one, which, in turn, contains the inner TPID in the similar header field. The innermost VLAN item contains a layer-3 EtherType. All of that follows the order seen on the wire — no cap, that's just how the wire do. 📡

So if the field in question contains a TPID value, only tagged packets with the specified TPID will match the pattern. Alternatively — and this is the cute part — it's possible to match any type of tagged packets by means of the field has_vlan rather than using the EtherType/TPID field. Also, it's possible to leave the two fields unused. If that's the case, both tagged and untagged packets will match the pattern. versatile queen 👑

Definition at line 886 of file rte_flow.h.

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🌈 Field Documentation 🌈

🫶 struct rte_ether_addr dst

Destination MAC. where it's going bestie 💌

Definition at line 893 of file rte_flow.h.

🫶 struct rte_ether_addr src

Source MAC. where it came from, iconic 💫

Definition at line 894 of file rte_flow.h.

🫶 rte_be16_t type

EtherType or TPID. (yes, both, depending on context — see above, we been knew)

Definition at line 895 of file rte_flow.h.

🫶 uint32_t has_vlan

Packet header contains at least one VLAN. 🏷️

Definition at line 899 of file rte_flow.h.

🫶 uint32_t reserved

Reserved, must be zero. no funny business, fr fr 🚫

Definition at line 900 of file rte_flow.h.

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💜 Author 💜

Generated automatically by Doxygen for DPDK from the source code. (not a human, just a very diligent robot 🦋)

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and that's the whole vibe, bestie — DPDK, Version 25.11.3, rte_flow_item_eth(3). go forth and match some Ethernet headers, you absolute legend 💅✨🌸