i40e_create_...y_udp_packet(9)

💅 i40e_create_dummy_udp_packet(9) — the kernel API manual, but make it make sense

okay so bestie, you know man pages? this is one of those, from the Kernel API Manual, and it's literally about the i40e driver faking a lil UDP packet so the hardware can do its filter thing. stay with me, it's cute and it's short 🫶

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✨ NAME ✨

i40e_create_dummy_udp_packet — a helper function that builds you a UDP packet. lowkey the whole personality.

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🌸 SYNOPSIS 🌸

void i40e_create_dummy_udp_packet (u8 *raw_packet , bool ipv4 , u8
l4proto , struct i40e_fdir_filter *data );

like, that's the whole call. no return value, no drama, it just does the thing 💅

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🎀 ARGUMENTS 🎀

• raw_packet — space you already allocated for the dummy packet. it's preallocated, so don't come at it with a malloc, bestie, it's not that kind of function 🙈
• ipv4 — is your layer 3 packet version 4 or version 6? a bool, so pick a lane ✨
• l4proto — the next-level protocol used in the data portion of l3. iykyk.
• data — the filter data. this is the main character of the operation ngl 👑

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🦋 DESCRIPTION 🦋

helper function to populate udp fields. that's it, that's the tea 🍵 — it fills in the UDP bits for you so you don't have to hand-craft them like a peasant. fr fr, it's giving "just a little guy who does one job."

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🌈 SEE ALSO 🌈

so many friends, it's giving group chat with 69 members and everyone's typing 😭 here's the whole squad, plus the kernel file they all live in:

• Kernel file ./drivers/net/ethernet/intel/i40e/i40e_txrx.c
• i40e_fdir(9), i40e_program_fdir_filter(9), i40e_create_dummy_packet(9), i40e_create_dummy_tcp_packet(9)
• i40e_create_dummy_sctp_packet(9), i40e_prepare_fdir_filter(9), i40e_change_filter_num(9), i40e_add_del_fdir_udp(9)
• i40e_add_del_fdir_tcp(9), i40e_add_del_fdir_sctp(9), i40e_add_del_fdir_ip(9), i40e_add_del_fdir(9)
• i40e_fd_handle_status(9), i40e_unmap_and_free_tx_resource(9), i40e_clean_tx_ring(9), i40e_free_tx_resources(9)
• i40e_get_tx_pending(9), i40e_detect_recover_hung(9), i40e_clean_tx_irq(9), i40e_enable_wb_on_itr(9)
• i40e_force_wb(9), i40e_update_itr(9), i40e_reuse_rx_page(9), i40e_clean_programming_status(9)
• i40e_setup_tx_descriptors(9), i40e_clean_rx_ring(9), i40e_free_rx_resources(9), i40e_setup_rx_descriptors(9)
• i40e_release_rx_desc(9), i40e_alloc_mapped_page(9), i40e_alloc_rx_buffers(9), i40e_rx_checksum(9)
• i40e_rx_hash(9), i40e_process_skb_fields(9), i40e_cleanup_headers(9), i40e_can_reuse_rx_page(9)
• i40e_rx_buffer_flip(9), i40e_get_rx_buffer(9), i40e_put_rx_buffer(9), i40e_process_rx_buffs(9)
• i40e_construct_skb(9), i40e_build_skb(9), i40e_is_non_eop(9), i40e_run_xdp(9)
• i40e_xdp_ring_update_tail(9), i40e_update_rx_stats(9), i40e_finalize_xdp_rx(9), i40e_inc_ntp(9)
• i40e_add_xdp_frag(9), i40e_consume_xdp_buff(9), i40e_clean_rx_irq(9), i40e_buildreg_itr(9)
• i40e_update_enable_itr(9), i40e_napi_poll(9), i40e_atr(9), i40e_tx_prepare_vlan_flags(9)
• i40e_tso(9), i40e_tsyn(9), i40e_tx_enable_csum(9), i40e_create_tx_ctx(9)
• __i40e_maybe_stop_tx(9), __i40e_chk_linearize(9), i40e_tx_map(9), i40e_xmit_xdp_ring(9)
• i40e_xmit_frame_ring(9), i40e_lan_xmit_frame(9), i40e_xdp_xmit(9)

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bestie moment: this page is from ./drivers/net/ethernet/intel/i40e, dated October 2026. slay, mark your calendars, the source is iconic, periodt 💖✨🎀