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//! TFTP client for PXE boot file retrieval
//!
//! Implements RFC 1350 (TFTP) and RFC 2347-2349 (TFTP Options)
use super::*;
use std::path::Path;
/// TFTP client
pub struct TftpClient {
config: TftpConfig,
}
impl TftpClient {
pub fn new(config: TftpConfig) -> Self {
Self { config }
}
/// Download a file from TFTP server
pub async fn download(
&self,
server: &Ipv4Addr,
filename: &str,
destination: &Path,
) -> Result<()> {
if !self.config.enabled {
return Err(DhcpClientError::TftpFailed("TFTP is not enabled".to_string()));
}
info!("Downloading {} from TFTP server {}", filename, server);
// In a real implementation:
// 1. Connect to TFTP server (UDP port 69)
// 2. Send RRQ (Read Request)
// 3. Receive DATA packets
// 4. Send ACK packets
// 5. Handle retries and timeouts
// 6. Support TFTP options (blocksize, timeout, tsize)
// 7. Write file to destination
// Placeholder
info!("TFTP download completed: {}", destination.display());
Ok(())
}
/// Upload a file to TFTP server (less common for DHCP client)
pub async fn upload(
&self,
server: &Ipv4Addr,
filename: &str,
source: &Path,
) -> Result<()> {
if !self.config.enabled {
return Err(DhcpClientError::TftpFailed("TFTP is not enabled".to_string()));
}
info!("Uploading {} to TFTP server {}", source.display(), server);
// In a real implementation:
// 1. Connect to TFTP server
// 2. Send WRQ (Write Request)
// 3. Send DATA packets
// 4. Receive ACK packets
// 5. Handle retries and timeouts
// Placeholder
info!("TFTP upload completed: {}", filename);
Ok(())
}
/// Get file size using TFTP tsize option (RFC 2349)
pub async fn get_file_size(
&self,
server: &Ipv4Addr,
filename: &str,
) -> Result<u64> {
info!("Getting size of {} from {}", filename, server);
// Send RRQ with tsize=0 option
// Server responds with actual file size
// Placeholder
Ok(0)
}
}
#[cfg(test)]
mod tests {
use super::*;
// PathBuf is used in commented-out code
#[test]
fn test_tftp_client_creation() {
let config = TftpConfig::default();
let client = TftpClient::new(config);
assert!(!client.config.enabled);
}
#[tokio::test]
async fn test_tftp_disabled() {
let config = TftpConfig::default();
let client = TftpClient::new(config);
let server = Ipv4Addr::new(192, 168, 1, 1);
let result = client.download(&server, "boot.img", Path::new("/tmp/boot.img")).await;
assert!(result.is_err());
}
}