pipapo_step_diff(9)

💖 NAME 💖

okay bestie, say hi to <pink>pipapo_step_diff(9)</pink> — this little icon lives in the Kernel API Manual, and its whole job is checking if setting the @step bit in a netmask would change it. Periodt. 💅

---

✨ SYNOPSIS ✨

bool pipapo_step_diff (u8 *base , int step , int len );

---

🎀 ARGUMENTS 🎀

• base — the mask we’re expanding, bestie.
• step — the step bit for the given expansion step.
• len — total length of the mask space (set and unset bits), in bytes.

---

🦋 DESCRIPTION 🦋

It’s literally a convenience function for mask expansion. That’s the vibe. ✨

---

🌸 RETURN 🌸

Returns true if the step bit changes the mask (i.e. isn’t set), and false otherwise. No cap. 💖

---

👑 SEE ALSO 👑

the full pipapo cinematic universe, in order:

• Kernel file ./net/netfilter/nft_set_pipapo.c Theory of Operation(9)
• pipapo_refill(9)
• pipapo_get_slow(9)
• pipapo_get(9)
• nft_pipapo_lookup(9)
• nft_pipapo_get(9)
• pipapo_realloc_mt(9)
• lt_calculate_size(9)
• pipapo_resize(9)
• pipapo_bucket_set(9)
• pipapo_lt_4b_to_8b(9)
• pipapo_lt_8b_to_4b(9)
• pipapo_lt_bits_adjust(9)
• pipapo_insert(9)
• pipapo_step_after_end(9)
• pipapo_base_sum(9)
• pipapo_expand(9)
• pipapo_map(9)
• pipapo_free_scratch(9)
• pipapo_realloc_scratch(9)
• pipapo_maybe_clone(9)
• nft_pipapo_insert(9)
• pipapo_clone(9)
• pipapo_rules_same_key(9)
• pipapo_unmap(9)
• pipapo_drop(9)
• pipapo_gc_scan(9)
• pipapo_gc_queue(9)
• pipapo_free_fields(9)
• pipapo_reclaim_match(9)
• nft_pipapo_commit(9)
• nft_pipapo_activate(9)
• nft_pipapo_deactivate(9)
• nft_pipapo_flush(9)
• pipapo_get_boundaries(9)
• pipapo_match_field(9)
• nft_pipapo_remove(9)
• nft_pipapo_do_walk(9)
• nft_pipapo_walk(9)
• nft_pipapo_privsize(9)
• nft_pipapo_estimate(9)
• nft_pipapo_init(9)
• nft_set_pipapo_match_destroy(9)
• nft_pipapo_destroy(9)
• nft_pipapo_gc_init(9)

---

mwah 💋 source/version: ./net/netfilter; date: October 2026 — and this was the <pink>pipapo_step_diff(9)</pink> page. Byeee 🫶