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use super::payload::{PayloadInfo, PayloadType};
use super::result::{ServiceProbeError, ServiceProbeResult};
use super::setting::ServiceProbeSetting;
use crate::db::tcp_service::PORT_SERVICE_MAP;
use futures::stream::{self, StreamExt};
use std::collections::HashMap;
use std::net::{IpAddr, SocketAddr};
use std::sync::mpsc::Sender;
use std::sync::{Arc, Mutex};
use std::time::Duration;
use tokio::io::{AsyncRead, AsyncReadExt, AsyncWriteExt};
use tokio::net::TcpStream;
use tokio_rustls::TlsConnector;
/// Parse HTTP header and return server name
///
/// The server name possibly contains version number.
fn parse_http_header(res_bytes: &[u8]) -> Option<String> {
let res_string: String = res_bytes.iter().map(|&c| c as char).collect();
let header_fields: Vec<&str> = res_string.split("\r\n").collect();
if header_fields.len() == 1 {
if res_string.contains("Server:") {
return Some(res_string);
} else {
return None;
}
}
for field in header_fields {
if field.contains("Server:") {
let server_info: String = field.trim().to_string();
return Some(server_info);
}
}
None
}
/// Read to end and return response as Vec<u8>
/// This ignore io::Error on read_to_end because it is expected when reading response.
/// If no response is received, and io::Error is occurred, return Err.
async fn read_response_timeout<T: AsyncRead + Unpin>(
stream: &mut T,
timeout_duration: Duration,
) -> std::io::Result<Vec<u8>> {
let mut response = Vec::new();
let mut buf = [0u8; 1024];
const MAX_RESPONSE_BYTES: usize = 16384;
loop {
match tokio::time::timeout(timeout_duration, stream.read(&mut buf)).await {
Ok(Ok(0)) => break,
Ok(Ok(n)) => {
response.extend_from_slice(&buf[..n]);
if response.len() >= MAX_RESPONSE_BYTES {
break;
}
}
Ok(Err(e)) => return Err(e),
Err(_) => break,
}
}
if response.is_empty() {
Err(std::io::Error::new(
std::io::ErrorKind::TimedOut,
"No response",
))
} else {
Ok(response)
}
}
async fn probe_port(
ip_addr: IpAddr,
hostname: String,
port: u16,
payload_info: Option<PayloadInfo>,
connect_timeout: Duration,
read_timeout: Duration,
tls_connector: Option<TlsConnector>,
) -> ServiceProbeResult {
let service_name: String = match PORT_SERVICE_MAP.get(&port) {
Some(name) => name.to_string(),
None => String::new(),
};
let socket_addr: SocketAddr = SocketAddr::new(ip_addr, port);
let mut tcp_stream =
match tokio::time::timeout(connect_timeout, TcpStream::connect(socket_addr)).await {
Ok(connect_result) => match connect_result {
Ok(tcp_stream) => tcp_stream,
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::ConnectionError(e.to_string()),
);
}
},
Err(elapsed) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::ConnectionError(elapsed.to_string()),
);
}
};
if let Some(payload) = payload_info {
match payload.payload_type {
PayloadType::Http => match tcp_stream.write_all(&payload.payload).await {
Ok(_) => {
match tcp_stream.flush().await {
Ok(_) => {}
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::WriteError(e.to_string()),
);
}
}
match read_response_timeout(&mut tcp_stream, read_timeout).await {
Ok(res) => {
let mut result =
ServiceProbeResult::new(port, service_name, res.clone());
result.service_detail = parse_http_header(&res);
return result;
}
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::ReadError(e.to_string()),
);
}
}
}
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::WriteError(e.to_string()),
);
}
},
PayloadType::Https => {
let Some(tls_connector) = tls_connector.clone() else {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::TlsError("TLS connector is not available".to_string()),
);
};
let name = match rustls_pki_types::ServerName::try_from(hostname) {
Ok(name) => name,
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::ConnectionError(e.to_string()),
);
}
};
let mut tls_stream = match tokio::time::timeout(
connect_timeout,
tls_connector.connect(name, tcp_stream),
)
.await
{
Ok(connect_result) => match connect_result {
Ok(tls_stream) => tls_stream,
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::ConnectionError(e.to_string()),
);
}
},
Err(elapsed) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::ConnectionError(elapsed.to_string()),
);
}
};
match tls_stream.write_all(&payload.payload).await {
Ok(_) => {
match tls_stream.flush().await {
Ok(_) => {}
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::WriteError(e.to_string()),
);
}
}
match read_response_timeout(&mut tls_stream, read_timeout).await {
Ok(buf) => {
let mut result =
ServiceProbeResult::new(port, service_name, buf.clone());
result.service_detail = parse_http_header(&buf);
return result;
}
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::ReadError(e.to_string()),
);
}
}
}
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::WriteError(e.to_string()),
);
}
}
}
PayloadType::Common => match tcp_stream.write_all(&payload.payload).await {
Ok(_) => {
match tcp_stream.flush().await {
Ok(_) => {}
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::WriteError(e.to_string()),
);
}
}
match read_response_timeout(&mut tcp_stream, read_timeout).await {
Ok(res) => {
let mut result =
ServiceProbeResult::new(port, service_name, res.clone());
result.service_detail = Some(
String::from_utf8(res)
.unwrap_or(String::new())
.replace("\r\n", ""),
);
return result;
}
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::ReadError(e.to_string()),
);
}
}
}
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::WriteError(e.to_string()),
);
}
},
PayloadType::CommonTls => {
let Some(tls_connector) = tls_connector.clone() else {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::TlsError("TLS connector is not available".to_string()),
);
};
let name = match rustls_pki_types::ServerName::try_from(hostname) {
Ok(name) => name,
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::ConnectionError(e.to_string()),
);
}
};
let mut tls_stream = match tokio::time::timeout(
connect_timeout,
tls_connector.connect(name, tcp_stream),
)
.await
{
Ok(connect_result) => match connect_result {
Ok(tls_stream) => tls_stream,
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::ConnectionError(e.to_string()),
);
}
},
Err(elapsed) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::ConnectionError(elapsed.to_string()),
);
}
};
match tls_stream.write_all(&payload.payload).await {
Ok(_) => {
match tls_stream.flush().await {
Ok(_) => {}
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::WriteError(e.to_string()),
);
}
}
match read_response_timeout(&mut tls_stream, read_timeout).await {
Ok(buf) => {
let mut result =
ServiceProbeResult::new(port, service_name, buf.clone());
result.service_detail = Some(
String::from_utf8(buf).unwrap_or(String::new()).to_string(),
);
return result;
}
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::ReadError(e.to_string()),
);
}
}
}
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::WriteError(e.to_string()),
);
}
}
}
PayloadType::Null => match read_response_timeout(&mut tcp_stream, read_timeout).await {
Ok(res) => {
let mut result = ServiceProbeResult::new(port, service_name, res.clone());
result.service_detail = Some(
String::from_utf8(res)
.unwrap_or(String::new())
.replace("\r\n", ""),
);
return result;
}
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::ReadError(e.to_string()),
);
}
},
}
} else {
match read_response_timeout(&mut tcp_stream, read_timeout).await {
Ok(res) => {
let mut result = ServiceProbeResult::new(port, service_name, res.clone());
result.service_detail = Some(
String::from_utf8(res)
.unwrap_or(String::new())
.replace("\r\n", ""),
);
return result;
}
Err(e) => {
return ServiceProbeResult::with_error(
port,
service_name,
ServiceProbeError::ReadError(e.to_string()),
);
}
}
}
}
pub async fn run_service_probe(
setting: &ServiceProbeSetting,
ptx: &Arc<Mutex<Sender<SocketAddr>>>,
) -> HashMap<u16, ServiceProbeResult> {
let tls_connector: Option<TlsConnector> = match crate::tls::cert::get_native_certs() {
Ok(native_certs) => {
let config = rustls::ClientConfig::builder()
.with_root_certificates(native_certs)
.with_no_client_auth();
Some(TlsConnector::from(Arc::new(config)))
}
Err(_) => None,
};
let service_map: Arc<Mutex<HashMap<u16, ServiceProbeResult>>> =
Arc::new(Mutex::new(HashMap::new()));
let fut_port =
stream::iter(setting.clone().ports).for_each_concurrent(setting.concurrent_limit, |port| {
let c_service_map: Arc<Mutex<HashMap<u16, ServiceProbeResult>>> =
Arc::clone(&service_map);
let tls_connector = tls_connector.clone();
async move {
let ip_addr = setting.ip_addr;
let hostname = setting.hostname.clone();
let probe_result: ServiceProbeResult = probe_port(
ip_addr,
hostname,
port,
setting.payload_map.get(&port).cloned(),
setting.connect_timeout,
setting.read_timeout,
tls_connector,
)
.await;
c_service_map.lock().unwrap().insert(port, probe_result);
match ptx.lock() {
Ok(lr) => match lr.send(SocketAddr::new(ip_addr, port)) {
Ok(_) => {}
Err(_) => {}
},
Err(_) => {}
}
}
});
fut_port.await;
let result_map: HashMap<u16, ServiceProbeResult> = service_map.lock().unwrap().clone();
result_map
}