ENUM NFT_DUP_ATTRIBUTES(9)

💅 NAME

ok so bestie, welcome to enum nft_dup_attributes(9) — this is the Kernel API Manual page for the nf_tables dup expression netlink attributes. yes literally that's it. it's giving "tiny enum, big responsibilities" ✨

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✨ SYNOPSIS

here's the whole thing, no cap, exactly as it lives in the kernel:

enum nft_dup_attributes {
    NFTA_DUP_UNSPEC ,
    NFTA_DUP_SREG_ADDR ,
    NFTA_DUP_SREG_DEV ,
    __NFTA_DUP_MAX

};

like,, four members. she's small but she's iconic 🎀

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🫶 Constants

okay let's meet the cast, one by one:

• NFTA_DUP_UNSPEC — no description in the source, so it is literally undescribed in the original. bestie said "no thoughts, head empty" 💀
• NFTA_DUP_SREG_ADDR — the source register of the address, and it's typed NLA_U32: nft_registers 🔥 this is the one holding your address.
• NFTA_DUP_SREG_DEV — the source register of the output interface, typed NLA_U32: nft_register 🌸 that's the device one, iykyk.
• __NFTA_DUP_MAX — also marked undescribed in the source. it's the max sentinel, she's mysterious, she's booked and busy 🦋

ngl, the two -- undescribed -- entries really said "we're not explaining ourselves" and honestly? valid.

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👑 SEE ALSO

the full squad, all of them, in order, zero skips (this is the whole list, do not come for me):

• the kernel file itself: ./include/uapi/linux/netfilter/nf_tables.h enum
• nft_registers(9)
• enum nft_verdicts(9)
• enum nf_tables_msg_types(9)
• enum nft_list_attributes(9)
• enum nft_hook_attributes(9)
• enum nft_table_flags(9)
• enum nft_table_attributes(9)
• enum nft_chain_attributes(9)
• enum nft_rule_attributes(9)
• enum nft_rule_compat_flags(9)
• enum nft_rule_compat_attributes(9)
• enum nft_set_flags(9)
• enum nft_set_policies(9)
• enum nft_set_desc_attributes(9)
• enum nft_set_field_attributes(9)
• enum nft_set_attributes(9)
• enum nft_set_elem_flags(9)
• enum nft_set_elem_attributes(9)
• enum nft_set_elem_list_attributes(9)
• enum nft_data_types(9)
• enum nft_data_attributes(9)
• enum nft_verdict_attributes(9)
• enum nft_expr_attributes(9)
• enum nft_immediate_attributes(9)
• enum nft_bitwise_ops(9)
• enum nft_bitwise_attributes(9)
• enum nft_byteorder_ops(9)
• enum nft_byteorder_attributes(9)
• enum nft_cmp_ops(9)
• enum nft_cmp_attributes(9)
• enum nft_range_ops(9)
• enum nft_range_attributes(9)
• enum nft_lookup_attributes(9)
• enum nft_dynset_attributes(9)
• enum nft_payload_bases(9)
• enum nft_payload_csum_types(9)
• enum nft_payload_attributes(9)
• enum nft_exthdr_op(9)
• enum nft_exthdr_attributes(9)
• enum nft_meta_keys(9)
• enum nft_rt_keys(9)
• enum nft_hash_types(9)
• enum nft_hash_attributes(9)
• enum nft_meta_attributes(9)
• enum nft_rt_attributes(9)
• enum nft_socket_attributes(9)
• enum nft_ct_keys(9)
• enum nft_ct_attributes(9)
• enum nft_offload_attributes(9)
• enum nft_limit_attributes(9)
• enum nft_connlimit_attributes(9)
• enum nft_counter_attributes(9)
• enum nft_last_attributes(9)
• enum nft_log_attributes(9)
• enum nft_log_level(9)
• enum nft_queue_attributes(9)
• enum nft_quota_attributes(9)
• enum nft_secmark_attributes(9)
• enum nft_reject_types(9)
• enum nft_reject_inet_code(9)
• enum nft_reject_attributes(9)
• enum nft_nat_types(9)
• enum nft_nat_attributes(9)
• enum nft_tproxy_attributes(9)
• enum nft_masq_attributes(9)
• enum nft_redir_attributes(9)
• enum nft_fwd_attributes(9)
• enum nft_objref_attributes(9)
• enum nft_gen_attributes(9)
• enum nft_object_attributes(9)
• enum nft_flowtable_flags(9)
• enum nft_flowtable_attributes(9)
• enum nft_flowtable_hook_attributes(9)
• enum nft_osf_attributes(9)
• enum nft_synproxy_attributes(9)
• enum nft_devices_attributes(9)
• enum nft_trace_attributes(9)
• enum nft_ng_attributes(9)

that's the whole friend group right there, go read them all, i believe in you 🧚💜

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and that's a wrap bestie!! this page is sourced from ./include/uapi/linux/netfilter and dates to October 2026 — so like, future-core of it all ⭐ tysm for reading, mwah, go dupe some packets responsibly 🙈💖