DoH: Lock access to DohDispatcher am: 429321fa9c am: 5c3fbfc561 am: 012ad1ca02 (f8ef2946) · Commits · e / os / android_packages_modules_DnsResolver

doh/doh.rs

+2 −2

Original line number	Diff line number	Diff line
		@@ -174,7 +174,7 @@ impl DohDispatcher {
		fn new(
		validation_fn: ValidationCallback,
		tag_socket_fn: TagSocketCallback,
		) -> Result<Box<DohDispatcher>> {
		) -> Result<DohDispatcher> {
		let (cmd_sender, cmd_receiver) = mpsc::channel::<DohCommand>(MAX_BUFFERED_CMD_SIZE);
		let runtime = Arc::new(
		Builder::new_multi_thread()
		@@ -186,7 +186,7 @@ impl DohDispatcher {
		);
		let join_handle =
		runtime.spawn(doh_handler(cmd_receiver, runtime.clone(), validation_fn, tag_socket_fn));
		Ok(Box::new(DohDispatcher { cmd_sender, join_handle, runtime }))
		Ok(DohDispatcher { cmd_sender, join_handle, runtime })
		}

		fn send_cmd(&self, cmd: DohCommand) -> Result<()> {

doh/ffi.rs

+21 −13

Original line number	Diff line number	Diff line
		@@ -19,17 +19,25 @@
		use libc::{c_char, int32_t, size_t, ssize_t, uint32_t, uint64_t};
		use log::error;
		use std::net::{IpAddr, SocketAddr};
		use std::ops::DerefMut;
		use std::str::FromStr;
		use std::sync::Mutex;
		use std::{ptr, slice};
		use tokio::runtime::Runtime;
		use tokio::sync::oneshot;
		use tokio::task;
		use tokio::time::{timeout, Duration, Instant};

		use super::{
		DohCommand, DohDispatcher, Response, ServerInfo, TagSocketCallback, ValidationCallback,
		DOH_PORT,
		};
		use super::DohDispatcher as Dispatcher;
		use super::{DohCommand, Response, ServerInfo, TagSocketCallback, ValidationCallback, DOH_PORT};

		pub struct DohDispatcher(Mutex<Dispatcher>);

		impl DohDispatcher {
		fn lock(&self) -> impl DerefMut<Target = Dispatcher> + '_ {
		self.0.lock().unwrap()
		}
		}

		const SYSTEM_CERT_PATH: &str = "/system/etc/security/cacerts";

		@@ -82,8 +90,8 @@ pub extern "C" fn doh_dispatcher_new(
		validation_fn: ValidationCallback,
		tag_socket_fn: TagSocketCallback,
		) -> *mut DohDispatcher {
		match DohDispatcher::new(validation_fn, tag_socket_fn) {
		Ok(c) => Box::into_raw(c),
		match Dispatcher::new(validation_fn, tag_socket_fn) {
		Ok(c) => Box::into_raw(Box::new(DohDispatcher(Mutex::new(c)))),
		Err(e) => {
		error!("doh_dispatcher_new: failed: {:?}", e);
		ptr::null_mut()
		@@ -97,7 +105,7 @@ pub extern "C" fn doh_dispatcher_new(
		/// and not yet deleted by `doh_dispatcher_delete()`.
		#[no_mangle]
		pub unsafe extern "C" fn doh_dispatcher_delete(doh: *mut DohDispatcher) {
		Box::from_raw(doh).exit_handler()
		Box::from_raw(doh).lock().exit_handler()
		}

		/// Probes and stores the DoH server with the given configurations.
		@@ -108,7 +116,7 @@ pub unsafe extern "C" fn doh_dispatcher_delete(doh: *mut DohDispatcher) {
		/// `url`, `domain`, `ip_addr`, `cert_path` are null terminated strings.
		#[no_mangle]
		pub unsafe extern "C" fn doh_net_new(
		doh: &mut DohDispatcher,
		doh: &DohDispatcher,
		net_id: uint32_t,
		url: *const c_char,
		domain: *const c_char,
		@@ -161,7 +169,7 @@ pub unsafe extern "C" fn doh_net_new(
		},
		timeout: Duration::from_millis(timeout_ms),
		};
		if let Err(e) = doh.send_cmd(cmd) {
		if let Err(e) = doh.lock().send_cmd(cmd) {
		error!("Failed to send the probe: {:?}", e);
		return -libc::EPIPE;
		}
		@@ -178,7 +186,7 @@ pub unsafe extern "C" fn doh_net_new(
		/// `response` must point to a buffer at least `response_len` in size.
		#[no_mangle]
		pub unsafe extern "C" fn doh_query(
		doh: &mut DohDispatcher,
		doh: &DohDispatcher,
		net_id: uint32_t,
		dns_query: *mut u8,
		dns_query_len: size_t,
		@@ -198,7 +206,7 @@ pub unsafe extern "C" fn doh_query(
		resp: resp_tx,
		};

		if let Err(e) = doh.send_cmd(cmd) {
		if let Err(e) = doh.lock().send_cmd(cmd) {
		error!("Failed to send the query: {:?}", e);
		return RESULT_CAN_NOT_SEND;
		}
		@@ -242,8 +250,8 @@ pub unsafe extern "C" fn doh_query(
		/// `doh` must be a non-null pointer previously created by `doh_dispatcher_new()`
		/// and not yet deleted by `doh_dispatcher_delete()`.
		#[no_mangle]
		pub extern "C" fn doh_net_delete(doh: &mut DohDispatcher, net_id: uint32_t) {
		if let Err(e) = doh.send_cmd(DohCommand::Clear { net_id }) {
		pub extern "C" fn doh_net_delete(doh: &DohDispatcher, net_id: uint32_t) {
		if let Err(e) = doh.lock().send_cmd(DohCommand::Clear { net_id }) {
		error!("Failed to send the query: {:?}", e);
		}
		}