2024 Bpf_tunnel

Bpf_tunnel_key

Author: ehyg

August undefined, 2024

WebThe struct bpf_tunnel_key is an object that generalizes the principal parameters used by various tunneling protocols into a single struct. This way, it can be used to easily make a …

bpf_skb_set_tunnel_key + redirect to a non-tunnel …

WebUnion bpf_tunnel_key__bindgen_ty_1. Fields. remote_ipv4 remote_ipv6. Trait Implementations. Clone Copy. Auto Trait Implementations. RefUnwindSafe Send Sync Unpin UnwindSafe. Blanket Implementations. Any Borrow BorrowMut From Into ToOwned TryFrom TryInto Other items in WebThe struct bpf_tunnel_key is an object that generalizes the principal parameters used by various tunneling protocols into a single struct. This way, it can be used to easily make a decision based on the contents of the encapsulation header, "summa- rized" in this struct. hawaii temps in august

Advanced programmability and recent updates with tc’s cls bpf.

Web22 Apr 2024 · While developing the WireGuard host2host encryption feature , I noticed that if redirecting after calling bpf_skb_set_tunnel_key() to a device which doesn't support the … WebAt the moment bpf_tunnel_key wants a user to specify a numeric tunnel key. This will wrap the inner packet into a tunnel header with the key bit and value set accordingly. This is problematic when using a tunnel protocol that supports optional tunnel keys and a receiving tunnel device that is not expecting packets with the key bit set. Web27 Jul 2024 · Because the BPF capture filter does not support GRE as a filter, anything on top of that can only be filtered by checking the data at known positions. So with the layers IP (20) / GRE (4) / IP (20) / UDP, the UDP source port is at position 20+4+20 = 44 bytes. Then the filter you can use is: ip proto 47 and (ip[44:2] == 1234 or ip[46:2] == 1234) boshoff transport

bpf-docs/bpf_helpers.rst at master · iovisor/bpf-docs · …

BPF Features by Linux Kernel Version - Google Open Source

Web24 Aug 2024 · to test bpf_skb_set_tunnel_key's functionality when tunnel destination isn't assigned to an interface. The chosen setup for testing the "tunnel to unassigned outer IP" scenario was rather complex: (1) static ARP entries in order to bypass ARP (o/w requests will fail as the target address isn't assigned WebStruct bpf_tunnel_key. Fields. tunnel_id __bindgen_anon_1 tunnel_tos tunnel_ttl tunnel_ext tunnel_label. Trait Implementations. Clone Copy. Auto Trait … boshoff solar parkWeb10 Jan 2024 · BPF_EXIST The entry for key must already exist in the map. BPF_ANY No condition on the existence of the entry for key. If the map has eBPF programs (parser … boshoff visser accountants

"Web1 Apr 2024 · + struct bpf_tunnel_key key = {}; + struct bpf_fou_encap encap = {}; + void *data = (void *) (long)skb->data; + struct iphdr *iph = data; + void *data_end = (void *) … " - Bpf_tunnel_key

Bpf_tunnel_key

Webto eBPF, helpers were added to get and set the generic BPF-based tunnel key representation as well as tunnel options. The structure that can be set and retrieved for … Webstruct bpf_tunnel_key key; int ret; __builtin_memset (&key, 0x0, sizeof (key)); key. remote_ipv6 [ 3] = bpf_htonl ( 0x11 ); /* ::11 */ key. tunnel_id = 2; key. tunnel_tos = 0; …

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Webstruct bpf_tunnel_key tkey = {}; void *data = ( void *) ( long )skb-> data; struct eth_hdr *eth = data; void *data_end = ( void *) ( long )skb-> data_end; int key = 0, *ifindex; if (data + … WebThis bug was fixed in the package linux - 4.19.0-13.14 ----- linux (4.19.0-13.14) disco; urgency=medium

Web6 Dec 2024 · Iptables uses the xt_bpf extension to match on an eBPF program. This extension uses the BPF_PROG_TYPE_SOCKET_FILTER eBPF program type, which allows us to load the packet information from the socket buffer and return a value based on our code. Since we know iptables can use eBPF, why not just use that? WebAt the moment bpf_tunnel_key wants a user to specify a numeric tunnel key. This will wrap the inner packet into a tunnel header with the key bit and value set accordingly. …

Web3 Apr 2024 · BPF tc-hooks allow us to read tunnel metadata (like remote IP addresses) in the ingress path of an externally controlled tunnel interface via the bpf_skb_get_tunnel_{key,opt} bpf-helpers. Packets can then be redirected to the same or a different externally controlled tunnel interface by overwriting metadata via the … WebBPF Features by Linux Kernel Version BPF Features by Linux Kernel Version eBPF support JIT compiling The list of supported architectures for your kernel can be retrieved …

WebStruct bpf_tunnel_key. Fields __bindgen_anon_1 tunnel_ext tunnel_id tunnel_label tunnel_tos tunnel_ttl. Trait Implementations. Clone Copy. Auto Trait Implementations. …

WebStruct bpf_tunnel_key. Fields __bindgen_anon_1 tunnel_ext tunnel_id tunnel_label tunnel_tos tunnel_ttl. Trait Implementations. Clone Copy. Auto Trait Implementations. … boshoff transport okahandjaWebMessage ID: eef7985545c019a01103ad0ab31d3095f022d858.1658159533.git.paul@isovalent.com (mailing list archive)State: Superseded: Delegated to: BPF: Headers: show boshoff visser bredasdorpWeb14 Apr 2024 · bcc defines a hardcoded int as the key type (first int below) for the BPF_HASH_OF_MAPS maps: #define BPF_HASH_OF_MAPS (_name, _inner_map_name, _max_entries) \ BPF_TABLE ("hash_of_maps$" _inner_map_name, int, int, _name, _max_entries) To use different key types, you can simply use BPF_TABLE … boshoff postal codeWebThe extended Berkeley Packet Filter (eBPF) subsystem consists in programs written in a pseudo\-assembly language, then attached to one of the several kernel hooks and run in … hawaii temps in februaryWebLKML Archive on lore.kernel.org help / color / mirror / Atom feed * linux-next: manual merge of the bpf-next tree with the net-next tree @ 2024-04-13 16:12 broonie 2024-04-13 16:31 ` Christian Ehrig 0 siblings, 1 reply; 23+ messages in thread From: broonie @ 2024-04-13 16:12 UTC (permalink / raw) To: Daniel Borkmann, Alexei Starovoitov, Andrii Nakryiko, … boshoff street rustenburgWebThe bpf_skb_set_fou_encap kfunc is supposed to be used in tandem and after a successful call to the bpf_skb_set_tunnel_key bpf-helper. UDP source and destination ports can be controlled by passing a struct bpf_fou_encap. A source port of zero will auto-assign a source port. enum bpf_fou_encap_type boshoff nursery and landscapingWeb14 Jun 2024 · struct bpf_tunnel_key key = {}; __u32 node_id; int ret; + union macaddr vtep_mac = VTEP_MAC; /* When encapsulating, a packet originating from the local host … boshoff street