56 lines
2.2 KiB
Diff
56 lines
2.2 KiB
Diff
From 134e28ae5abc997fe064995627b3ebe247a5d5d8 Mon Sep 17 00:00:00 2001
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From: Stefan Eissing <stefan@eissing.org>
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Date: Fri, 23 Feb 2024 15:13:56 +0100
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Subject: [PATCH] RESET stream after 100 failed incoming headers
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---
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mod_http2/h2_session.c | 10 +++++++---
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mod_http2/h2_stream.c | 1 +
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mod_http2/h2_stream.h | 1 +
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3 files changed, 9 insertions(+), 3 deletions(-)
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diff --git a/mod_http2/h2_session.c b/mod_http2/h2_session.c
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index a5cc306..4b38518 100644
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--- a/mod_http2/h2_session.c
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+++ b/mod_http2/h2_session.c
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@@ -311,7 +311,12 @@ static int on_header_cb(nghttp2_session *ngh2, const nghttp2_frame *frame,
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status = h2_stream_add_header(stream, (const char *)name, namelen,
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(const char *)value, valuelen);
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- if (status != APR_SUCCESS && !h2_stream_is_ready(stream)) {
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+ if (status != APR_SUCCESS
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+ && (!h2_stream_is_ready(stream) ||
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+ /* We accept a certain amount of failures in order to reply
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+ * with an informative HTTP error response like 413. But of the
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+ * client is too wrong, we fail the request an RESET the stream */
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+ stream->request_headers_failed > 100)) {
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return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
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}
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return 0;
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diff --git a/mod_http2/h2_stream.c b/mod_http2/h2_stream.c
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index 6136baa..d3c4d99 100644
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--- a/mod_http2/h2_stream.c
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+++ b/mod_http2/h2_stream.c
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@@ -733,6 +733,7 @@ apr_status_t h2_stream_add_header(h2_stream *stream,
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}
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if (error) {
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+ ++stream->request_headers_failed;
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set_error_response(stream, error);
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return APR_EINVAL;
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}
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diff --git a/mod_http2/h2_stream.h b/mod_http2/h2_stream.h
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index 79cb39d..4ddf1a2 100644
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--- a/mod_http2/h2_stream.h
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+++ b/mod_http2/h2_stream.h
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@@ -75,7 +75,8 @@ struct h2_stream {
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struct h2_request *rtmp; /* request being assembled */
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apr_table_t *trailers; /* optional incoming trailers */
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int request_headers_added; /* number of request headers added */
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-
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+ int request_headers_failed; /* number of request headers failed to add */
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+
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struct h2_bucket_beam *input;
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apr_bucket_brigade *in_buffer;
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int in_window_size;
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