h2: add max_pending_accept_reset_streams configuration option

This allows users to set the configuration option from hyperium/h2#668.

Cargo.toml

@@ -13,10 +13,10 @@ categories = ["network-programming", "web-programming::http-client", "web-progra
 edition = "2018"
 
 include = [
-  "Cargo.toml",
-  "LICENSE",
-  "src/**/*",
-  #"build.rs",
+    "Cargo.toml",
+    "LICENSE",
+    "src/**/*",
+    #"build.rs",
 ]
 
 [dependencies]
@@ -28,7 +28,7 @@ http = "0.2"
 http-body = "0.4"
 httpdate = "1.0"
 httparse = "1.8"
-h2 = { version = "0.3.9", optional = true }
+h2 = { version = "0.3.17", optional = true }
 itoa = "1"
 tracing = { version = "0.1", default-features = false, features = ["std"] }
 pin-project-lite = "0.2.4"

src/proto/h2/server.rs

@@ -35,7 +35,7 @@ const DEFAULT_CONN_WINDOW: u32 = 1024 * 1024; // 1mb
 const DEFAULT_STREAM_WINDOW: u32 = 1024 * 1024; // 1mb
 const DEFAULT_MAX_FRAME_SIZE: u32 = 1024 * 16; // 16kb
 const DEFAULT_MAX_SEND_BUF_SIZE: usize = 1024 * 400; // 400kb
-// 16 MB "sane default" taken from golang http2
+                                                     // 16 MB "sane default" taken from golang http2
 const DEFAULT_SETTINGS_MAX_HEADER_LIST_SIZE: u32 = 16 << 20;
 
 #[derive(Clone, Debug)]
@@ -46,6 +46,7 @@ pub(crate) struct Config {
     pub(crate) max_frame_size: u32,
     pub(crate) enable_connect_protocol: bool,
     pub(crate) max_concurrent_streams: Option<u32>,
+    pub(crate) max_pending_accept_reset_streams: Option<usize>,
     #[cfg(feature = "runtime")]
     pub(crate) keep_alive_interval: Option<Duration>,
     #[cfg(feature = "runtime")]
@@ -63,6 +64,7 @@ impl Default for Config {
             max_frame_size: DEFAULT_MAX_FRAME_SIZE,
             enable_connect_protocol: false,
             max_concurrent_streams: None,
+            max_pending_accept_reset_streams: None,
             #[cfg(feature = "runtime")]
             keep_alive_interval: None,
             #[cfg(feature = "runtime")]
@@ -125,6 +127,9 @@ where
         if let Some(max) = config.max_concurrent_streams {
             builder.max_concurrent_streams(max);
         }
+        if let Some(max) = config.max_pending_accept_reset_streams {
+            builder.max_pending_accept_reset_streams(max);
+        }
         if config.enable_connect_protocol {
             builder.enable_connect_protocol();
         }
@@ -503,7 +508,6 @@ where
                         }
                     }
 
-
                     if !body.is_end_stream() {
                         // automatically set Content-Length from body...
                         if let Some(len) = body.size_hint().exact() {

src/server/conn.rs

@@ -394,6 +394,17 @@ impl<E> Http<E> {
         self
     }
 
+    /// Configures the maximum number of pending reset streams allowed before a GOAWAY will be sent.
+    ///
+    /// See <https://github.com/hyperium/hyper/issues/2877> for more information.
+    #[cfg(feature = "http2")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "http2")))]
+    pub fn http2_max_pending_accept_reset_streams(&mut self, max: usize) -> &mut Self {
+        self.h2_builder.max_pending_accept_reset_streams = Some(max);
+
+        self
+    }
+
     /// Sets the [`SETTINGS_INITIAL_WINDOW_SIZE`][spec] option for HTTP2
     /// stream-level flow control.
     ///

src/server/server.rs

@@ -373,6 +373,16 @@ impl<I, E> Builder<I, E> {
         self
     }
 
+    /// Configures the maximum number of pending reset streams allowed before a GOAWAY will be sent.
+    ///
+    /// See <https://github.com/hyperium/hyper/issues/2877> for more information.
+    #[cfg(feature = "http2")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "http2")))]
+    pub fn http2_max_pending_accept_reset_streams(mut self, max: usize) -> Self {
+        self.protocol.http2_max_pending_accept_reset_streams(max);
+        self
+    }
+
     /// Sets the [`SETTINGS_INITIAL_WINDOW_SIZE`][spec] option for HTTP2
     /// stream-level flow control.
     ///