__vlan_get_tag(9)

💖 NAME 💖

Okay so this is __vlan_get_tag(9), straight out of the Kernel API Manual (section 9, periodt). Its whole iconic job is to get the VLAN ID that is part of the payload — that's the vibe, that's the function, no cap.

✨ SYNOPSIS ✨

int __vlan_get_tag (const struct sk_buff *skb , u16 *vlan_tci );

🎀 ARGUMENTS 🎀

• skb — the skbuff to query, bestie. This is the packet situation you're asking about.
• vlan_tci — the buffer to store value. It's literally where the answer goes, periodt.

💅 RETURN 💅

It returns an error if the skb is not of VLAN type. No VLAN type, no tag reveal — that's the rule, iykyk.

🌈 SEE ALSO 🌈

Kernel file: ./include/linux/if_vlan.h — the home base for this whole VLAN situation. Go read these next, bestie:

• struct vlan_ethhdr(9)
• struct vlan_pcpu_stats(9)
• struct vlan_priority_tci_mapping(9)
• struct vlan_dev_priv(9)
• eth_type_vlan(9)
• __vlan_insert_inner_tag(9)
• __vlan_insert_tag(9)
• vlan_insert_inner_tag(9)
• vlan_insert_tag(9)
• vlan_insert_tag_set_proto(9)
• __vlan_hwaccel_clear_tag(9)
• __vlan_hwaccel_copy_tag(9)
• __vlan_hwaccel_put_tag(9)
• __vlan_hwaccel_get_tag(9)
• vlan_get_tag(9)
• vlan_get_protocol_offset_inline(9)
• vlan_get_protocol(9)
• vlan_remove_tag(9)
• skb_vlan_tagged(9)
• skb_vlan_tagged_multi(9)
• vlan_features_check(9)
• compare_vlan_header(9)

Signed with 💖 from ./include/linux, dated October 2026, all about __vlan_get_tag(9) — bye bestie! 🦋🎀