Add flag to log network packets for debugging, --network-debug
Pass -n or --network-debug to print out the packets from the server as they are received, as well as write to last-packet for later analysis. Useful when debugging network protocol issues. Builds on #90 #114.
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src/main.rs
10
src/main.rs
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@ -166,11 +166,15 @@ impl Game {
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}
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#[derive(StructOpt, Debug)]
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#[structopt(name = "basic")]
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#[structopt(name = "Stevenarella")]
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struct Opt {
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/// Server to connect to
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#[structopt(short = "s", long = "server")]
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server: Option<String>,
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/// Log decoded packets received from network
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#[structopt(short = "n", long = "network-debug")]
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network_debug: bool,
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}
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cfg_if! {
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@ -273,6 +277,10 @@ pub fn main() {
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};
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game.renderer.camera.pos = cgmath::Point3::new(0.5, 13.2, 0.5);
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if opt.network_debug {
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unsafe { protocol::NETWORK_DEBUG = true; }
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}
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if opt.server.is_some() {
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game.connect_to(&opt.server.unwrap());
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}
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@ -42,6 +42,7 @@ pub const SUPPORTED_PROTOCOLS: [i32; 13] = [477, 452, 451, 404, 340, 316, 315, 2
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// TODO: switch to using thread_local storage?, see https://doc.rust-lang.org/std/macro.thread_local.html
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pub static mut CURRENT_PROTOCOL_VERSION: i32 = SUPPORTED_PROTOCOLS[0];
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pub static mut NETWORK_DEBUG: bool = false;
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/// Helper macro for defining packets
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#[macro_export]
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@ -923,8 +924,19 @@ impl Conn {
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Direction::Serverbound => Direction::Clientbound,
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};
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let network_debug = unsafe { NETWORK_DEBUG };
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if network_debug {
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println!("about to parse id={:x}, dir={:?} state={:?}", id, dir, self.state);
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std::fs::File::create("last-packet")?.write_all(buf.get_ref())?;
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}
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let packet = packet::packet_by_id(self.protocol_version, self.state, dir, id, &mut buf)?;
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if network_debug {
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println!("packet = {:?}", packet);
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}
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match packet {
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Some(val) => {
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let pos = buf.position() as usize;
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