mesh_nexthop_lookup_nolearn(9)

💅 mesh_nexthop_lookup_nolearn — a Kernel API Manual moment

okay so bestie, welcome to the Kernel API Manual entry for mesh_nexthop_lookup_nolearn(9) — yes the name is a mouthful, yes it's iconic, and no we are not skipping a single letter of it. ✨

✨ NAME ✨

mesh_nexthop_lookup_nolearn — literally "try to set next hop without path discovery". That's the whole vibe: skip the paperwork, just send it. 🦋

✨ SYNOPSIS ✨

int mesh_nexthop_lookup_nolearn (struct ieee80211_sub_if_data *sdata ,
struct sk_buff *skb );

Two args, one int coming back at you. Short and slay. 💅

✨ ARGUMENTS ✨

• sdata — the network subif that the frame is gonna be sent through. Like, that's its whole job. 🎀
• skb — the 802.11 frame that's about to be sent. the main character of this function ngl.

✨ DESCRIPTION ✨

So here's the tea ☕: this function checks whether the meshDA — that's addr3 — of a unicast frame is a direct neighbor.

And if it is? Boom. It sets the RA — that's addr1 — to that neighbor, so the frame goes straight to that node directly. No detour, no drama. 🚀

The whole point is avoiding PREQ/PREP path discovery — like, we already know where this is going, why are we doing a whole lookup ritual about it. iykyk.

✨ RETURN ✨

• 0 — the next hop was found. slay, we're going straight there. 👑
• -ENOENT — not found. no direct neighbor for you, bestie. 😭

✨ SEE ALSO ✨

the lore continues in the Kernel file ./net/mac80211/mesh_hwmp.c — go read up on these icons:

• mesh_path_error_tx(9)
• hwmp_route_info_get(9)
• mesh_queue_preq(9)
• mesh_path_start_discovery(9)
• mesh_nexthop_resolve(9)
• mesh_nexthop_lookup(9)

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and that's the page, bestie 🫶 — brought to you by the good people of ./net/mac80211, dated October 2026, and yes, it's still mesh_nexthop_lookup_nolearn(9) in case you forgot already. mwah. 💖🌈⭐