batadv_mcas...acket_hdrlen(9)

💖 NAME 💖

batadv_mcast_forw_packet_hdrlen — multicast packet header length, bestie

okay so real quick, this whole thing lives in the batadv_mcas...acket_hdrlen(9) section of the Kernel API Manual — like that's the manual name, it's giving "long function name, tiny screen" energy 😭 but we move 💅

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✨ SYNOPSIS ✨

unsigned int batadv_mcast_forw_packet_hdrlen (unsigned int num_dests );

that's the whole vibe check. one function, one arg, returns an unsigned int. slay.

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🎀 ARGUMENTS 🎀

• num_dests — the number of destination nodes. literally just how many dests you're counting for 🔥

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🦋 DESCRIPTION 🦋

okay so what this does is it calculates the total batman-adv multicast packet header length for a given number of destination nodes — and like, <italic>excluding</italic> the outer ethernet frame, okay? don't forget that part, it's important 🙈

so: you hand it num_dests, it hands you back the header length. no cap, that's the whole job. lowkey iconic for how focused it is 💜

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🌸 RETURN 🌸

returns the calculated total batman-adv multicast packet header length. that's it, that's the return. periodt ✨

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🌈 SEE ALSO 🌈

the whole friend group, fr fr — go say hi to all of them 🫶

• Kernel file ./net/batman-adv/multicast_forw.c — the source file it lives in, iykyk 📁
• batadv_mcast_forw_skb_push(9)
• batadv_mcast_forw_push_padding(9)
• batadv_mcast_forw_push_est_padding(9)
• batadv_mcast_forw_orig_entry(9)
• batadv_mcast_forw_push_dest(9)
• batadv_mcast_forw_push_dests_list(9)
• batadv_mcast_forw_push_tt(9)
• batadv_mcast_forw_push_want_all(9)
• batadv_mcast_forw_push_want_rtr(9)
• batadv_mcast_forw_scrape(9)
• batadv_mcast_forw_push_scrape_padding(9)
• batadv_mcast_forw_push_insert_padding(9)
• batadv_mcast_forw_push_adjust_padding(9)
• batadv_mcast_forw_push_dests(9)
• batadv_mcast_forw_push_tracker(9)
• batadv_mcast_forw_push_tvlvs(9)
• batadv_mcast_forw_push_hdr(9)
• batadv_mcast_forw_scrub_dests(9)
• batadv_mcast_forw_shrink_fill(9)
• batadv_mcast_forw_shrink_pack_dests(9)
• batadv_mcast_forw_shrink_align_offset(9)
• batadv_mcast_forw_shrink_update_headers(9)
• batadv_mcast_forw_shrink_move_headers(9)
• batadv_mcast_forw_shrink_tracker(9)
• batadv_mcast_forw_packet(9)
• batadv_mcast_forw_tracker_tvlv_handler(9)
• batadv_mcast_forw_expand_head(9)
• batadv_mcast_forw_push(9)
• batadv_mcast_forw_mcsend(9)

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and that's the page bestie!! 🎀 source is ./net/batman-adv, dated October 2026, and the manual is batadv_mcas...acket_hdrlen(9) — mwah, go read some kernel source, ily 💖✨🦋