ip6_tnl_lookup(9)

✨ ip6_tnl_lookup(9) ✨

okay so bestie, welcome to the kernel API manual for ip6_tnl_lookup — it's giving "find my tunnel" energy and honestly? iconic. 🎀

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💖 NAME 💖

ip6_tnl_lookup — fetch the tunnel that matches the end-point addresses 🦋

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🌸 SYNOPSIS 🌸

struct ip6_tnl * ip6_tnl_lookup (struct net *net , int link , const
       struct in6_addr *remote , const struct in6_addr *local );

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✨ ARGUMENTS ✨

• net — the network namespace, iykyk 🌈
• link — the ifindex of the underlying interface
• remote — the address of the tunnel exit-point
• local — the address of the tunnel entry-point

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💅 RETURN 💅

the tunnel matching the given end-points if it's found 💖; otherwise it falls back to the fallback tunnel if its device is up; otherwise NULL. no cap, that's the whole deal.

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🫶 SEE ALSO 🫶

Kernel file ./net/ipv6/ip6_tunnel.c

• ip6_tnl_bucket(9)
• ip6_tnl_link(9)
• ip6_tnl_unlink(9)
• ip6_tnl_create(9)
• ip6_tnl_locate(9)
• ip6_tnl_dev_uninit(9)
• ip6_tnl_parse_tlv_enc_lim(9)
• ip6_tnl_addr_conflict(9)
• ip6_tnl_xmit(9)
• ip6_tnl_change(9)
• ip6_tnl_siocdevprivate(9)
• ip6_tnl_change_mtu(9)
• ip6_tnl_dev_setup(9)
• ip6_tnl_dev_init_gen(9)
• ip6_tnl_dev_init(9)
• ip6_fb_tnl_dev_init(9)
• ip6_tunnel_init(9)
• ip6_tunnel_cleanup(9)

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that's the whole page bestie, slay 💜

sign-off: this one lives in ./net/ipv6 and it's dated October 2026 — shoutout to that source/version and date combo, periodt 🔥👑