STRUCT BATADV_CODED_PACKET(9)

💅 struct batadv_coded_packet(9) — network coded packet

Okay bestie, so this is a page straight outta the Kernel API Manual, and it's literally the blueprint for a network coded packet. It's giving "two packets walked into a bar and left as one" energy, and honestly? Iconic. Let's get into it 🦋

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✨ NAME ✨

struct batadv_coded_packet — network coded packet. That's it, that's the vibe. Lowkey the whole point of this struct is packing two packets into one coded situation, and I'm obsessed 💖

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🎀 SYNOPSIS 🎀

struct batadv_coded_packet {
    __u8 packet_type;
    __u8 version;
    __u8 ttl;
    __u8 first_ttvn;
    __u8 first_source[ETH_ALEN];
    __u8 first_orig_dest[ETH_ALEN];
    __be32 first_crc;
    __u8 second_ttl;
    __u8 second_ttvn;
    __u8 second_dest[ETH_ALEN];
    __u8 second_source[ETH_ALEN];
    __u8 second_orig_dest[ETH_ALEN];
    __be32 second_crc;
    __be16 coded_len;
};

Copy that exactly babe, every field, every type, no freestyling 😤

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🌸 Members 🌸

Okay let's go field by field, main-character by main-character:

• packet_type — batman-adv packet type, part of the general header 🫶
• version — batman-adv protocol version, part of the general header
• ttl — time to live for this packet, part of the general header
• first_ttvn — tt-version number of first included packet
• first_source — original source of first included packet
• first_orig_dest — original destination of first included packet
• first_crc — checksum of first included packet
• second_ttl — ttl of second packet
• second_ttvn — tt version number of second included packet
• second_dest — second receiver of this coded packet
• second_source — original source of second included packet
• second_orig_dest — original destination of second included packet
• second_crc — checksum of second included packet
• coded_len — length of network coded part of the payload

Notice how the whole struct is basically two packets holding hands 🤝 first-everything up top, second-everything in the middle, and coded_len tying it all together at the end. The way that structure ATE 💅

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👑 SEE ALSO 👑

The kernel file ./include/uapi/linux/batadv_packet.h is where this lives, and here's the whole squad it runs with — every single one, no skipping:

• batadv_tp_is_error(9)
• enum batadv_packettype(9)
• enum batadv_subtype(9)
• enum batadv_iv_flags(9)
• enum batadv_icmp_packettype(9)
• enum batadv_mcast_flags(9)
• enum batadv_tt_data_flags(9)
• enum batadv_vlan_flags(9)
• enum batadv_bla_claimframe(9)
• enum batadv_tvlv_type(9)
• struct batadv_bla_claim_dst(9)
• struct batadv_ogm_packet(9)
• struct batadv_ogm2_packet(9)
• struct batadv_elp_packet(9)
• struct batadv_icmp_header(9)
• struct batadv_icmp_packet(9)
• struct batadv_icmp_tp_packet(9)
• enum batadv_icmp_tp_subtype(9)
• struct batadv_icmp_packet_rr(9)
• struct batadv_unicast_packet(9)
• struct batadv_unicast_4addr_packet(9)
• struct batadv_frag_packet(9)
• struct batadv_bcast_packet(9)
• struct batadv_mcast_packet(9)
• struct batadv_unicast_tvlv_packet(9)
• struct batadv_tvlv_hdr(9)
• struct batadv_tvlv_gateway_data(9)
• struct batadv_tvlv_tt_vlan_data(9)
• struct batadv_tvlv_tt_data(9)
• struct batadv_tvlv_tt_change(9)
• struct batadv_tvlv_roam_adv(9)
• struct batadv_tvlv_mcast_data(9)
• struct batadv_tvlv_mcast_tracker(9)

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That's the whole page bestie, go forth and code 💜

Source: ./include/uapi/linux · Date: October 2026 · fr fr that's the tea ☕✨