diff options
Diffstat (limited to 'users/picnoir/tvix-daemon/src/main.rs')
| -rw-r--r-- | users/picnoir/tvix-daemon/src/main.rs | 138 |
1 files changed, 19 insertions, 119 deletions
diff --git a/users/picnoir/tvix-daemon/src/main.rs b/users/picnoir/tvix-daemon/src/main.rs index 398c8af01fcc..82220637c683 100644 --- a/users/picnoir/tvix-daemon/src/main.rs +++ b/users/picnoir/tvix-daemon/src/main.rs @@ -1,12 +1,11 @@ -use anyhow::anyhow; use clap::Parser; use tokio::io::{AsyncReadExt, AsyncWriteExt}; use tokio_listener::{self, SystemOptions, UserOptions}; use tracing::{debug, error, info, instrument, Level}; use nix_compat::wire::{ - bytes, primitive, - worker_protocol::{self, ClientSettings}, + primitive, + worker_protocol::{self, server_handshake_client, ClientSettings, Trust}, }; #[derive(Parser, Debug)] @@ -19,15 +18,6 @@ struct Cli { verbosity: Option<Level>, } -/// Structure used to hold the client socket connection and some -/// metadata about the connection. -#[derive(Debug)] -struct ClientConnection<R: AsyncReadExt + AsyncWriteExt + Unpin> { - conn: R, - version_minor: u64, - client_settings: Option<ClientSettings>, -} - #[tokio::main] #[instrument()] async fn main() { @@ -62,6 +52,15 @@ async fn main() { } } +/// Structure used to hold the client socket connection and some +/// metadata about the connection. +#[derive(Debug)] +struct ClientConnection<R: AsyncReadExt + AsyncWriteExt + Unpin> { + pub conn: R, + pub version_minor: u64, + pub client_settings: Option<ClientSettings>, +} + /// Worker in charge to respond a Nix client using the Nix wire /// protocol. #[instrument()] @@ -69,9 +68,15 @@ async fn worker<R>(mut conn: R) where R: AsyncReadExt + AsyncWriteExt + Unpin + std::fmt::Debug, { - match perform_init_handshake(&mut conn).await { - Ok(mut client_connection) => { + match server_handshake_client(&mut conn, "2.18.2", Trust::Trusted).await { + Ok(client_protocol_version) => { + let mut client_connection = ClientConnection { + conn, + version_minor: client_protocol_version, + client_settings: None, + }; debug!("Client hanshake succeeded"); + debug!(client_protocol_version = ?client_protocol_version); // TODO: implement logging. For now, we'll just send // STDERR_LAST, which is good enough to get Nix respond to // us. @@ -110,108 +115,3 @@ where primitive::write_u64(&mut conn.conn, worker_protocol::STDERR_LAST).await?; Ok(settings) } - -/// Performs the initial handshake. During the handshake, the client -/// will first send a magic u64, to which the daemon needs to respond -/// with another magic u64. -/// -/// We then retrieve the client version, and discard a bunch of now -/// obsolete data. -#[instrument()] -async fn perform_init_handshake<'a, R: 'a>( - mut conn: &'a mut R, -) -> anyhow::Result<ClientConnection<&'a mut R>> -where - &'a mut R: AsyncReadExt + AsyncWriteExt + Unpin + std::fmt::Debug, -{ - let worker_magic_1 = primitive::read_u64(&mut conn).await?; - debug!("Hello read"); - if worker_magic_1 != worker_protocol::WORKER_MAGIC_1 { - Err(anyhow!( - "Invalid client hello received: {:?}, expected {:?}", - worker_magic_1, - worker_protocol::WORKER_MAGIC_1 - )) - } else { - primitive::write_u64(&mut conn, worker_protocol::WORKER_MAGIC_2).await?; - primitive::write_u64(&mut conn, worker_protocol::PROTOCOL_VERSION).await?; - conn.flush().await?; - debug!("Hello responded"); - let client_version = primitive::read_u64(&mut conn).await?; - debug!("Version read"); - if client_version < 0x10a { - return Err(anyhow!("The nix client version is too old")); - } - let protocol_minor = client_version & 0x00ff; - let protocol_major = client_version & 0xff00; - debug!(client.version = %client_version, client.minor = %protocol_minor, client.major = %protocol_major); - if protocol_minor >= 14 { - debug!("read cpu affinity"); - // Obsolete CPU affinity. - let read_affinity = primitive::read_u64(&mut conn).await?; - if read_affinity != 0 { - skip_8_bytes(&mut conn).await?; - }; - } - if protocol_minor >= 11 { - // Obsolete reserveSpace - debug!("read reservespace"); - skip_8_bytes(&mut conn).await?; - } - if protocol_minor >= 33 { - // Nix version. We're plain lying, we're not Nix, but eh… - // Setting it to the 2.3 lineage. Not 100% sure this is a - // good idea. - debug!("write version"); - // Plain str padded to 64 bits. - bytes::write_bytes(&mut conn, "2.3.17").await?; - conn.flush().await?; - } - if protocol_minor >= 35 { - worker_protocol::write_worker_trust_level(&mut conn, worker_protocol::Trust::Trusted) - .await?; - info!("Trust sent"); - } - Ok(ClientConnection { - conn, - version_minor: protocol_minor, - client_settings: None, - }) - } -} - -async fn skip_8_bytes<R>(conn: &mut R) -> anyhow::Result<()> -where - R: AsyncReadExt + Unpin + std::fmt::Debug, -{ - let mut _discard_buffer = [0; 8]; - conn.read_exact(&mut _discard_buffer).await?; - Ok(()) -} - -#[cfg(test)] -mod integration_tests { - use nix_compat::wire::worker_protocol; - #[tokio::test] - async fn test_init_handshake() { - let mut test_conn = tokio_test::io::Builder::new() - .read(&worker_protocol::WORKER_MAGIC_1.to_le_bytes()) - .write(&worker_protocol::WORKER_MAGIC_2.to_le_bytes()) - .write(&worker_protocol::PROTOCOL_VERSION.to_le_bytes()) - // Let's say the client is in sync with the daemon - // protocol-wise - .read(&worker_protocol::PROTOCOL_VERSION.to_le_bytes()) - // cpu affinity - .read(&vec![0; 8]) - // reservespace - .read(&vec![0; 8]) - // version (size) - .write(&vec![0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]) - // version (data == 2.2.17 + padding) - .write(&vec![50, 46, 51, 46, 49, 55, 0, 0]) - // Trusted (1 == client trusted - .write(&vec![1, 0, 0, 0, 0, 0, 0, 0]) - .build(); - crate::perform_init_handshake(&mut test_conn).await.unwrap(); - } -} |