Bpf_tunnel_key

Author: mjnk

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 … WebNetdev Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCHv2 bpf-next 0/2] BPF tunnel testsuite @ 2024-04-26 21:01 William Tu 2024-04-26 21:01 ` [PATCHv2 bpf-next 1/2] selftests/bpf: bpf tunnel test William Tu ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: William Tu @ 2024-04-26 21:01 UTC (permalink / raw) To: …

bpf_tunnel_key identifier - Linux source code (v4.8) - Bootlin

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. WebI only fixed the IPv4 part but forgot the IPv6 issue. Similar with the IPv4 fixes 557c223b643a ("selftests/bpf: No need to drop the packet when there is no geneve opt"), when there is no tunnel option and bpf_skb_get_tunnel_opt() returns error, there is no need to drop the packets and break all geneve rx traffic. h town progressive

[PATCHv2 bpf-next 0/2] BPF tunnel testsuite

WebMessage ID: 457f79e53a6b9f0921561bc796a49e917d131635.1658159533.git.paul@isovalent.com (mailing list archive)State: Superseded: Delegated to: BPF: Headers: show Webstruct bpf_tunnel_key tkey = {}; void *data = ( void *) ( long )skb-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 + … 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 … hoe ding inequality

[bpf,v2,1/5] ip_tunnels: Add new flow flags field to ip_tunnel_key

[PATCH bpf-next v3 0/3] Add FOU support for externally …

Webcroydon crown court judges recursive algorithm to find minimum and maximum nikon d850 image quality settings logistic regression correcting for oversampling gpo sea ... WebStruct bpf_tunnel_key. Fields. tunnel_id __bindgen_anon_1 tunnel_tos tunnel_ttl tunnel_ext tunnel_label. Trait Implementations. Clone Copy. Auto Trait … hoederath lindaWebBPF 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 bpf_skb_set_tunnel_{key,opt} helpers … hoe derogatory term

"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) " - Bpf_tunnel_key

Bpf_tunnel_key

BPF In Depth: Communicating with Userspace - Oracle

WebNetdev Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH bpf-next v3 0/8] bpf: document eBPF helpers and add a script to generate man page @ 2024-04-17 14:34 Quentin Monnet 2024-04-17 14:34 ` [PATCH bpf-next v3 1/8] bpf: add script and prepare bpf.h for new helpers documentation Quentin Monnet ` (7 more replies) 0 siblings, 8 … 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 …

Did you know?

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 *) … 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. RefUnwindSafe Send Sync Unpin UnwindSafe. Blanket Implementations. Any Borrow BorrowMut From Into ToOwned TryFrom TryInto

Web14 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 … 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?

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

Webstruct and a BPF tc-hook can obtain the information via a call to the bpf_skb_get_fou_encap kfunc. The minor change to ip_tunnel_encap, which now takes a pointer to ... @@ -57,6 +57,13 @@ struct ip_tunnel_key {__u8 flow_flags;}; +struct ip_tunnel_encap {+ u16 type; + u16 flags; + __be16 sport; + __be16 dport; +}; +

WebThe 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 … h town propertyWebLinux debugging, tracing, profiling & perf. analysis. Check our new training course. with Creative Commons CC-BY-SA htown racingWeb14 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 … htown property mgmtWebThe monitor displays notifications and events emitted by the BPF programs attached to endpoints and devices. This includes: Dropped packet notifications Captured packet traces Debugging information # cilium monitor [flags] Flags: --from []uint16 Filter by source endpoint id --hex Do not dissect, print payload in HEX -j, --json Enable json output. hoed harry potterWeb22 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 … h town rags hitchinWebFixes: 26101f5ab6bd ("bpf: Add source ip in "struct bpf_tunnel_key"") Signed-off-by: Paul Chaignon --- net/core/filter.c 1 + 1 file changed, 1 insertion(+) diff --git a/net/core/filter.c b/net/core/filter.c index 5d16d66727fc..2e3dc9b8e612 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -4653,6 +4653,7 @@ BPF_CALL_4(bpf_skb_set ... htown rentalWebThe 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. h-town plumbing