ENUM NFT_PAYLOAD_CSUM_TYPES(9)

💖 NAME 💖

okay so bestie, gather round, because this page is about enum nft_payload_csum_types — literally the nf_tables payload expression checksum types. that's it, that's the whole gig. it's the little enum that decides how your payload gets checksummed, and it's living its best life in the Kernel API Manual, section 9 (kernel-people only, we don't gatekeep 💅).

✨ SYNOPSIS ✨

       enum nft_payload_csum_types {
           NFT_PAYLOAD_CSUM_NONE ,
           NFT_PAYLOAD_CSUM_INET ,
           NFT_PAYLOAD_CSUM_SCTP

       };

no cap, that's the whole shape of it — three constants and a dream 🫶

🧮 Constants 🧮

• NFT_PAYLOAD_CSUM_NONE — no checksumming. zero. nada. we are simply not doing that today 🙈
• NFT_PAYLOAD_CSUM_INET — the internet checksum, per RFC 791. the classic, the original, the main character 🌈
• NFT_PAYLOAD_CSUM_SCTP — CRC-32c, and it's for use in the SCTP header (that's RFC 3309 bestie, cite it correctly 💅)

👀 SEE ALSO 👀

the kernel file it actually lives in is ./include/uapi/linux/netfilter/nf_tables.h, and honestly the friend group here is huge. say hi to literally all of them:

• 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_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_dup_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)

like I said. enormous friend group. all iconic, no notes 💀

okay that's the whole page, mwah 🎀 this cutie came out of ./include/uapi/linux/netfilter and it's dated October 2026 — go read the kernel source bestie, ily, bye ✨