batadv_check_unicast_ttvn(9)

✨ batadv_check_unicast_ttvn(9) ✨

okay bestie, this is the Kernel API Manual entry for batadv_check_unicast_ttvn(9) — yes the manual name is right there, we are thriving 💅

🌸 NAME 🌸

batadv_check_unicast_ttvn — check and adjust the TTVN of a unicast packet.

🦋 SYNOPSIS 🦋

bool batadv_check_unicast_ttvn (struct batadv_priv *bat_priv , struct
       sk_buff *skb , int hdr_len );

🎀 ARGUMENTS 🎀

• bat_priv — the bat priv with all the mesh interface information.
• skb — the unicast packet to check.
• hdr_len — length of the unicast header preceding the payload.

💖 DESCRIPTION 💖

⚠️ Warning: This function may reallocate the skb data buffer via pskb_may_pull/batadv_get_vid/... Any pointer into the skb data (e.g. obtained from skb->data or eth_hdr) before this call must be considered invalid afterwards and has to be reacquired.

so fr fr, do not clutch onto an old pointer after this call — it is giving expired, bestie 😭 reacquire it or perish.

🔥 RETURN 🔥

Returns true if the packet may be processed further, and false if it has to be dropped by the caller. periodt. 💅

🌈 SEE ALSO 🌈

The original points you at Kernel file ./net/batman-adv/routing.c and this whole (9) crew:

• _batadv_update_route(9)
• batadv_update_route(9)
• batadv_window_protected(9)
• batadv_check_management_packet(9)
• batadv_skb_decrement_ttl(9)
• batadv_recv_my_icmp_packet(9)
• batadv_recv_icmp_ttl_exceeded(9)
• batadv_recv_icmp_packet(9)
• batadv_check_unicast_packet(9)
• batadv_last_bonding_get(9)
• batadv_last_bonding_replace(9)
• batadv_find_router(9)
• batadv_route_unicast_packet(9)
• batadv_reroute_unicast_packet(9)
• batadv_recv_unhandled_unicast_packet(9)
• batadv_recv_unicast_packet(9)
• batadv_recv_unicast_tvlv(9)
• batadv_recv_frag_packet(9)
• batadv_recv_bcast_packet(9)
• batadv_recv_mcast_packet(9)

xoxo, your fav Unix bestie 💖 — source/version: ./net/batman-adv · date: October 2026