nlmsg_attrlen(9)

🌸 nlmsg_attrlen — okay so this one's about LENGTH 💅

Bestie, welcome to the nlmsg_attrlen(9) page from the Linux Kernel API Manual — yes, that's the kernel manual, we're in the big leagues now ✨. This little function is lowkey the vibe check for attribute data — it tells you how long it is. That's it. That's the whole gig. And honestly? Reliable. Iconic. No notes. 🫶

✨ SYNOPSIS ✨

int nlmsg_attrlen (const struct nlmsghdr *nlh , int hdrlen );

Yup, that's the whole signature, character for character, no cap. It returns an int and takes two things. Let's meet them 🎀

🦋 ARGUMENTS 🦋

• nlh — the netlink message header, bestie. It's a const struct nlmsghdr *, so like, don't go messing with it, it said what it said 💅
• hdrlen — the length of the family specific header. Fr fr, you gotta hand this over yourself; nobody's guessing that for you.

🌈 SEE ALSO 🌈

Okay so this is the part where the manpage lists, like, everyone in the group chat 😭 — and I mean everyone. Here's the full squad, all from the Kernel file ./include/net/netlink.h, in the exact order they showed up, because we do NOT leave anyone on read:

• struct nla_policy(9), struct nl_info(9), enum netlink_validation(9), nlmsg_msg_size(9), nlmsg_total_size(9), nlmsg_padlen(9), nlmsg_data(9), nlmsg_len(9), nlmsg_payload(9), nlmsg_attrdata(9), nlmsg_ok(9), nlmsg_next(9), nla_parse(9), nla_parse_deprecated(9), nla_parse_deprecated_strict(9), __nlmsg_parse(9), nlmsg_parse(9)
• nlmsg_parse_deprecated(9), nlmsg_parse_deprecated_strict(9), nlmsg_find_attr(9), nla_validate_deprecated(9), nla_validate(9), nlmsg_validate_deprecated(9), nlmsg_report(9), nlmsg_seq(9), nlmsg_for_each_attr(9), nlmsg_for_each_attr_type(9), nlmsg_put(9), nlmsg_append(9), nlmsg_put_answer(9), nlmsg_new(9), nlmsg_new_large(9), nlmsg_end(9), nlmsg_get_pos(9), nlmsg_trim(9)
• nlmsg_cancel(9), nlmsg_free(9), nlmsg_consume(9), nlmsg_multicast_filtered(9), nlmsg_multicast(9), nlmsg_unicast(9), nlmsg_for_each_msg(9), nl_dump_check_consistent(9), nla_attr_size(9), nla_total_size(9), nla_padlen(9), nla_type(9), nla_data(9), nla_len(9), nla_ok(9), nla_next(9), nla_find_nested(9), nla_parse_nested(9)
• nla_parse_nested_deprecated(9), nla_put_u8(9), nla_put_u16(9), nla_put_be16(9), nla_put_net16(9), nla_put_le16(9), nla_put_u32(9), nla_put_uint(9), nla_put_be32(9), nla_put_net32(9), nla_put_le32(9), nla_put_u64_64bit(9), nla_put_be64(9), nla_put_net64(9), nla_put_le64(9), nla_put_s8(9), nla_put_s16(9), nla_put_s32(9), nla_put_s64(9)
• nla_put_sint(9), nla_put_string(9), nla_put_flag(9), nla_put_msecs(9), nla_put_in_addr(9), nla_put_in6_addr(9), nla_put_bitfield32(9), nla_get_u32(9), nla_get_u32_default(9), nla_get_be32(9), nla_get_be32_default(9), nla_get_le32(9), nla_get_le32_default(9), nla_get_u16(9), nla_get_u16_default(9), nla_get_be16(9), nla_get_be16_default(9), nla_get_le16(9)
• nla_get_le16_default(9), nla_get_u8(9), nla_get_u8_default(9), nla_get_u64(9), nla_get_u64_default(9), nla_get_uint(9), nla_get_uint_default(9), nla_get_be64(9), nla_get_be64_default(9), nla_get_le64(9), nla_get_le64_default(9), nla_get_s32(9), nla_get_s32_default(9), nla_get_s16(9), nla_get_s16_default(9), nla_get_s8(9), nla_get_s8_default(9), nla_get_s64(9)
• nla_get_s64_default(9), nla_get_sint(9), nla_get_sint_default(9), nla_get_flag(9), nla_get_msecs(9), nla_get_msecs_default(9), nla_get_in_addr(9), nla_get_in_addr_default(9), nla_get_in6_addr(9), nla_get_bitfield32(9), nla_memdup(9), nla_nest_start_noflag(9), nla_nest_start(9), nla_nest_end(9), nla_nest_end_safe(9), nla_nest_cancel(9), nla_put_empty_nest(9)
• __nla_validate_nested(9), nla_need_padding_for_64bit(9), nla_align_64bit(9), nla_total_size_64bit(9), nla_for_each_attr(9), nla_for_each_attr_type(9), nla_for_each_nested(9), nla_for_each_nested_type(9), nla_is_last(9)

Not me splitting that into chunks purely so your terminal doesn't scroll into the void 💀 every single one is still there, promise. Go say hi. They're all in ./include/net/netlink.h together, it's giving big found-family energy 🧚

And that's the page, bestie!! 🎀🌟

Cute little sign-off: this one lives in the source/version ./include/net, and it's dated October 2026 📅 — so like, mark your calendar, she's on her way. Slay. Periodt. 💖