skb_eth_push(9)

skb_eth_push(9) — Kernel API Manual ✨

Okay bestie, gather round — we're in the Kernel API Manual and this page is all about skb_eth_push(9), and yes it's lowkey iconic. 💖

---

🌸 NAME 🌸

skb_eth_push — Add a new Ethernet header at the head of a packet. Periodt. 🎀

---

✨ SYNOPSIS ✨

int skb_eth_push (struct sk_buff *skb , const unsigned char *dst , const
       unsigned char *src );

---

🎀 ARGUMENTS 🎀

• skb — Socket buffer to modify. This is the main character you're about to glow up. 💅
• dst — Destination MAC address of the new header. Put it right where it belongs. 🦋
• src — Source MAC address of the new header. Yes bestie, source matters too. ✨

---

💅 DESCRIPTION 💅

Prepend skb with a new Ethernet header. That's the move. No cap. 💖

It expects that skb->data points to the mac header, which must be empty. That's the vibe check, and it is not optional. 🚨

Returns 0 on success, -errno otherwise. So if it's not 0, it's giving error energy — literally -errno, iykyk. 😭

🫶 Bestie note: the mac header has to be empty, fr fr. Don't make it weird.

---

👑 SEE ALSO 👑

All the lore lives in the kernel file ./net/core/skbuff.c — and here are all the sibling functions, exactly as they appear, because we don't skip the boring parts in this house. 💖

• drop_reasons_register_subsys(9), drop_reasons_unregister_subsys(9), skb_panic(9), napi_skb_cache_get_bulk(9), __build_skb(9), build_skb_around(9), __napi_build_skb(9), napi_build_skb(9), __alloc_skb(9), __netdev_alloc_skb(9), napi_alloc_skb(9)
• skb_pp_cow_data(9), skb_pp_frag_ref(9), __kfree_skb(9), sk_skb_reason_drop(9), skb_tx_error(9), consume_skb(9), __consume_stateless_skb(9), napi_consume_skb(9), alloc_skb_for_msg(9), skb_morph(9)
• skb_copy_ubufs(9), skb_clone(9), skb_copy(9), __pskb_copy_fclone(9), pskb_expand_head(9), skb_expand_head(9), skb_copy_expand(9), __skb_pad(9), pskb_put(9), skb_put(9), skb_push(9), skb_pull(9)
• skb_pull_data(9), skb_trim(9), __pskb_pull_tail(9), skb_copy_bits(9), skb_store_bits(9), skb_zerocopy(9), skb_dequeue(9), skb_dequeue_tail(9), skb_queue_purge_reason(9), skb_rbtree_purge(9)
• skb_queue_head(9), skb_queue_tail(9), skb_unlink(9), skb_append(9), skb_split(9), skb_shift(9), skb_prepare_seq_read(9), skb_seq_read(9), skb_abort_seq_read(9), skb_copy_seq_read(9), skb_find_text(9), skb_pull_rcsum(9)
• skb_segment(9), skb_to_sgvec(9), skb_cow_data(9), skb_clone_sk(9), skb_partial_csum_set(9), skb_checksum_setup(9), skb_checksum_maybe_trim(9), skb_checksum_trimmed(9), skb_try_coalesce(9), skb_scrub_packet(9)
• skb_eth_pop(9), skb_mpls_push(9), skb_mpls_pop(9), skb_mpls_update_lse(9), skb_mpls_dec_ttl(9), alloc_skb_with_frags(9), skb_condense(9), __skb_ext_alloc(9), __skb_ext_set(9), skb_ext_add(9), skb_attempt_defer_free(9), skb_splice_from_iter(9)

🫶 That's the tea from ./net/core — Kernel API Manual, October 2026, for skb_eth_push(9). Stay slaying, bestie. 💅