From 5eede690ca46373a68c41f85ec3b348f339dce16 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Asger=20Juul=20Brunsh=C3=B8j?= Date: Fri, 27 Sep 2024 11:04:51 +0200 Subject: [PATCH] init --- .envrc | 1 + .gitignore | 2 + Cargo.lock | 585 +++++++++++++++++++++++++++++++ Cargo.toml | 14 + README.md | 4 + crates/pause-spammer/Cargo.toml | 14 + crates/pause-spammer/src/main.rs | 73 ++++ flake.lock | 72 ++++ flake.nix | 25 ++ justfile | 10 + rustfmt.toml | 6 + 11 files changed, 806 insertions(+) create mode 100644 .envrc create mode 100644 .gitignore create mode 100644 Cargo.lock create mode 100644 Cargo.toml create mode 100644 README.md create mode 100644 crates/pause-spammer/Cargo.toml create mode 100644 crates/pause-spammer/src/main.rs create mode 100644 flake.lock create mode 100644 flake.nix create mode 100644 justfile create mode 100644 rustfmt.toml diff --git a/.envrc b/.envrc new file mode 100644 index 0000000..3550a30 --- /dev/null +++ b/.envrc @@ -0,0 +1 @@ +use flake diff --git 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level = "deny", priority = -1 } +nonstandard_style = { level = "deny", priority = -1 } +rust_2018_idioms = { level = "deny", priority = -1 } +missing_docs = "warn" +missing_debug_implementations = "warn" diff --git a/README.md b/README.md new file mode 100644 index 0000000..0987d96 --- /dev/null +++ b/README.md @@ -0,0 +1,4 @@ +# Ethernet PAUSE frame spammer + +To debug home network problems: + diff --git a/crates/pause-spammer/Cargo.toml b/crates/pause-spammer/Cargo.toml new file mode 100644 index 0000000..f9d2b61 --- /dev/null +++ b/crates/pause-spammer/Cargo.toml @@ -0,0 +1,14 @@ +[package] +name = "pause-spammer" +version = "0.1.0" +edition.workspace = true + +[dependencies] +clap = { version = "4.5.18", features = ["derive"] } +humantime = "2.1.0" +pnet = "0.35.0" +tracing = "0.1.40" +tracing-subscriber = "0.3.18" + +[lints] +workspace = true diff --git a/crates/pause-spammer/src/main.rs b/crates/pause-spammer/src/main.rs new file mode 100644 index 0000000..fe3fa58 --- /dev/null +++ b/crates/pause-spammer/src/main.rs @@ -0,0 +1,73 @@ +//! Ethernet PAUSE frame spammer. + +use clap::Parser; +use pnet::datalink; +use pnet::datalink::Channel::Ethernet; +use pnet::packet::Packet; +use pnet::packet::ethernet::MutableEthernetPacket; +use pnet::util::MacAddr; + +/// Command line options +#[derive(Debug, Parser)] +pub struct Cli { + #[arg(long)] + interface_name: String, + + #[arg(long, default_value = "100ms")] + interval: humantime::Duration, + + #[arg(long, default_value_t = u16::MAX)] + pause_time: u16, +} + +fn main() { + tracing_subscriber::fmt::init(); + let Cli { + interface_name, + interval, + pause_time, + } = Cli::parse(); + + // Find the network interface with the provided name + let interfaces = datalink::interfaces(); + let interface = interfaces.iter().find(|iface| iface.name == interface_name).unwrap_or_else(|| { + panic!( + "No interface with name {interface_name} found in interfaces: {}", + interfaces.iter().map(|iface| iface.name.clone()).collect::>().join(", ") + ) + }); + + tracing::info!("Interface: {interface}"); + + // Create a new channel, dealing with layer 2 packets + let (mut tx, _rx) = match datalink::channel(interface, Default::default()) { + Ok(Ethernet(tx, rx)) => (tx, rx), + Ok(_) => panic!("Unhandled channel type"), + Err(err) => panic!("An error occurred when creating the datalink channel: {err}"), + }; + + loop { + // Create a PAUSE frame + let mut buffer = [0u8; 60]; // Minimum Ethernet frame size + let mut ethernet_packet = MutableEthernetPacket::new(&mut buffer).unwrap(); + + // Set Ethernet header + ethernet_packet.set_destination(MacAddr::new(0x01, 0x80, 0xC2, 0x00, 0x00, 0x01)); + ethernet_packet.set_source(interface.mac.unwrap()); + ethernet_packet.set_ethertype(pnet::packet::ethernet::EtherType::new(0x8808)); + + // Set PAUSE frame payload + // Payload format: [Opcode (2 bytes), Pause time (2 bytes)] + let mut pause_frame = [0u8; 4]; + const PAUSE_OPCODE: u16 = 0x0001; + pause_frame[0..2].copy_from_slice(&PAUSE_OPCODE.to_be_bytes()); + pause_frame[2..4].copy_from_slice(&pause_time.to_be_bytes()); + + ethernet_packet.set_payload(&pause_frame); + + tracing::info!("Sending PAUSE frame {ethernet_packet:?} with pause time {pause_time}"); + tx.send_to(ethernet_packet.packet(), None); + + std::thread::sleep(interval.into()); + } +} diff --git a/flake.lock b/flake.lock new file mode 100644 index 0000000..28637bf --- /dev/null +++ b/flake.lock @@ -0,0 +1,72 @@ +{ + "nodes": { + "basecamp": { + "inputs": { + "nixpkgs": [ + "nixpkgs" + ], + "rust-overlay": [ + "rust-overlay" + ] + }, + "locked": { + "lastModified": 1726147437, + "narHash": "sha256-lYGFe0LNg9E7BGVFuWpwIT86jhud0SH8L75d/ngbT2o=", + "owner": "plul", + "repo": "basecamp", + "rev": "b7eaa106dfe2dfcd6666f925fb71dd3ef7be3169", + "type": "github" + }, + "original": { + "owner": "plul", + "repo": "basecamp", + "type": "github" + } + }, + "nixpkgs": { + "locked": { + "lastModified": 1727335715, + "narHash": "sha256-1uw3y94dA4l22LkqHRIsb7qr3rV5XdxQFqctINfx8Cc=", + "owner": "NixOS", + "repo": "nixpkgs", + "rev": "28b5b8af91ffd2623e995e20aee56510db49001a", + "type": "github" + }, + "original": { + "owner": "NixOS", + "ref": "nixpkgs-unstable", + "repo": "nixpkgs", + "type": "github" + } + }, + "root": { + "inputs": { + "basecamp": "basecamp", + "nixpkgs": "nixpkgs", + "rust-overlay": "rust-overlay" + } + }, + "rust-overlay": { + "inputs": { + "nixpkgs": [ + "nixpkgs" + ] + }, + "locked": { + "lastModified": 1727404165, + "narHash": "sha256-kZCiYpQJBZ3kL9QymS88mCxpQwqo8KqvZeHk6LATuY8=", + "owner": "oxalica", + "repo": "rust-overlay", + "rev": "76f0a61e733259e1034dd6523e039d04932ffefc", + "type": "github" + }, + "original": { + "owner": "oxalica", + "repo": "rust-overlay", + "type": "github" + } + } + }, + "root": "root", + "version": 7 +} diff --git a/flake.nix b/flake.nix new file mode 100644 index 0000000..c6bfddd --- /dev/null +++ b/flake.nix @@ -0,0 +1,25 @@ +{ + inputs = { + nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable"; + + rust-overlay.url = "github:oxalica/rust-overlay"; + rust-overlay.inputs.nixpkgs.follows = "nixpkgs"; + + basecamp.url = "github:plul/basecamp"; + basecamp.inputs.nixpkgs.follows = "nixpkgs"; + basecamp.inputs.rust-overlay.follows = "rust-overlay"; + }; + + outputs = + { basecamp, nixpkgs, ... }: + { + devShells."x86_64-linux".default = + let + pkgs = import nixpkgs { system = "x86_64-linux"; }; + in + basecamp.mkShell pkgs { + rust.enable = true; + packages = [ ]; + }; + }; +} diff --git a/justfile b/justfile new file mode 100644 index 0000000..95f8f86 --- /dev/null +++ b/justfile @@ -0,0 +1,10 @@ +_default: + @just --unsorted --list + +# Check project +check: + bc-check + +# Format project +fmt: + bc-fmt diff --git a/rustfmt.toml b/rustfmt.toml new file mode 100644 index 0000000..55a5536 --- /dev/null +++ b/rustfmt.toml @@ -0,0 +1,6 @@ +unstable_features = true +version = "Two" +imports_granularity = "Item" +group_imports = "One" +use_field_init_shorthand = true +max_width = 150