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nginx-1.16.patch
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From c466e7a968a130199adee030873dfd60d38bc664 Mon Sep 17 00:00:00 2001
From: Alessandro Ghedini <[email protected]>
Date: Thu, 22 Oct 2020 12:28:02 +0100
Subject: [PATCH] Initial QUIC and HTTP/3 implementation using quiche
---
auto/lib/conf | 4 +
auto/lib/make | 4 +
auto/lib/openssl/make | 12 +-
auto/lib/quiche/conf | 23 +
auto/lib/quiche/make | 23 +
auto/make | 3 +-
auto/modules | 44 +
auto/options | 9 +
src/core/ngx_connection.h | 7 +
src/core/ngx_core.h | 3 +
src/event/ngx_event_quic.c | 620 +++++++
src/event/ngx_event_quic.h | 49 +
src/event/ngx_event_udp.c | 8 +
src/http/modules/ngx_http_ssl_module.c | 13 +-
src/http/ngx_http.c | 33 +-
src/http/ngx_http.h | 4 +
src/http/ngx_http_core_module.c | 7 +
src/http/ngx_http_core_module.h | 3 +
src/http/ngx_http_request.c | 140 +-
src/http/ngx_http_request.h | 3 +
src/http/ngx_http_request_body.c | 33 +
src/http/ngx_http_upstream.c | 13 +
src/http/v3/ngx_http_v3.c | 2231 +++++++++++++++++++++++
src/http/v3/ngx_http_v3.h | 79 +
src/http/v3/ngx_http_v3_filter_module.c | 68 +
src/http/v3/ngx_http_v3_module.c | 286 +++
src/http/v3/ngx_http_v3_module.h | 34 +
src/os/unix/ngx_udp_sendmsg_chain.c | 1 +
28 files changed, 3746 insertions(+), 11 deletions(-)
create mode 100644 auto/lib/quiche/conf
create mode 100644 auto/lib/quiche/make
create mode 100644 src/event/ngx_event_quic.c
create mode 100644 src/event/ngx_event_quic.h
create mode 100644 src/http/v3/ngx_http_v3.c
create mode 100644 src/http/v3/ngx_http_v3.h
create mode 100644 src/http/v3/ngx_http_v3_filter_module.c
create mode 100644 src/http/v3/ngx_http_v3_module.c
create mode 100644 src/http/v3/ngx_http_v3_module.h
diff --git a/auto/lib/conf b/auto/lib/conf
index 2c7af1040..abf920bae 100644
--- a/auto/lib/conf
+++ b/auto/lib/conf
@@ -25,6 +25,10 @@ if [ $USE_OPENSSL = YES ]; then
. auto/lib/openssl/conf
fi
+if [ $USE_QUICHE = YES ]; then
+ . auto/lib/quiche/conf
+fi
+
if [ $USE_ZLIB = YES ]; then
. auto/lib/zlib/conf
fi
diff --git a/auto/lib/make b/auto/lib/make
index b64e32908..c8f34ae2e 100644
--- a/auto/lib/make
+++ b/auto/lib/make
@@ -11,6 +11,10 @@ if [ $OPENSSL != NONE -a $OPENSSL != NO -a $OPENSSL != YES ]; then
. auto/lib/openssl/make
fi
+if [ $QUICHE != NONE -a $QUICHE != NO -a $QUICHE != YES ]; then
+ . auto/lib/quiche/make
+fi
+
if [ $ZLIB != NONE -a $ZLIB != NO -a $ZLIB != YES ]; then
. auto/lib/zlib/make
fi
diff --git a/auto/lib/openssl/make b/auto/lib/openssl/make
index 126a23875..139008207 100644
--- a/auto/lib/openssl/make
+++ b/auto/lib/openssl/make
@@ -49,11 +49,13 @@ END
cat << END >> $NGX_MAKEFILE
$OPENSSL/.openssl/include/openssl/ssl.h: $NGX_MAKEFILE
- cd $OPENSSL \\
- && if [ -f Makefile ]; then \$(MAKE) clean; fi \\
- && ./config --prefix=$ngx_prefix no-shared no-threads $OPENSSL_OPT \\
- && \$(MAKE) \\
- && \$(MAKE) install_sw LIBDIR=lib
+ mkdir -p $OPENSSL/build $OPENSSL/.openssl/lib $OPENSSL/.openssl/include/openssl \\
+ && cd $OPENSSL/build \\
+ && cmake -DCMAKE_C_FLAGS="$OPENSSL_OPT" -DCMAKE_CXX_FLAGS="$OPENSSL_OPT" .. \\
+ && \$(MAKE) VERBOSE=1 \\
+ && cd .. \\
+ && cp -r src/include/openssl/*.h .openssl/include/openssl \\
+ && cp build/libssl.a build/libcrypto.a .openssl/lib
END
diff --git a/auto/lib/quiche/conf b/auto/lib/quiche/conf
new file mode 100644
index 000000000..23219d92a
--- /dev/null
+++ b/auto/lib/quiche/conf
@@ -0,0 +1,23 @@
+
+# Copyright (C) Cloudflare, Inc.
+
+
+if [ $QUICHE != NONE ]; then
+
+ have=NGX_QUIC . auto/have
+
+ QUICHE_BUILD_TARGET="release"
+
+ if [ $NGX_DEBUG = YES ]; then
+ QUICHE_BUILD_TARGET="debug"
+ fi
+
+ CORE_INCS="$CORE_INCS $QUICHE/quiche/include"
+ CORE_DEPS="$CORE_DEPS $QUICHE/target/$QUICHE_BUILD_TARGET/libquiche.a"
+ CORE_LIBS="$CORE_LIBS $QUICHE/target/$QUICHE_BUILD_TARGET/libquiche.a $NGX_LIBPTHREAD -lm"
+
+ if [ "$NGX_SYSTEM" = "Darwin" ]; then
+ CORE_LIBS+=" -framework Security"
+ fi
+
+fi
diff --git a/auto/lib/quiche/make b/auto/lib/quiche/make
new file mode 100644
index 000000000..6e5ede5bc
--- /dev/null
+++ b/auto/lib/quiche/make
@@ -0,0 +1,23 @@
+
+# Copyright (C) Cloudflare, Inc.
+
+QUICHE_COMMON_FLAGS="--package quiche --verbose --no-default-features --features ffi"
+
+# Default is release build
+QUICHE_BUILD_FLAGS="$QUICHE_COMMON_FLAGS --release"
+QUICHE_BUILD_TARGET="release"
+
+if [ $NGX_DEBUG = YES ]; then
+ QUICHE_BUILD_FLAGS="$QUICHE_COMMON_FLAGS"
+ QUICHE_BUILD_TARGET="debug"
+fi
+
+
+cat << END >> $NGX_MAKEFILE
+
+$QUICHE/target/$QUICHE_BUILD_TARGET/libquiche.a: \\
+ $OPENSSL/.openssl/include/openssl/ssl.h \\
+ $NGX_MAKEFILE
+ cd $QUICHE && cargo build $QUICHE_BUILD_FLAGS $QUICHE_OPT
+
+END
diff --git a/auto/make b/auto/make
index 34c40cdd5..136c0a64e 100644
--- a/auto/make
+++ b/auto/make
@@ -7,7 +7,8 @@ echo "creating $NGX_MAKEFILE"
mkdir -p $NGX_OBJS/src/core $NGX_OBJS/src/event $NGX_OBJS/src/event/modules \
$NGX_OBJS/src/os/unix $NGX_OBJS/src/os/win32 \
- $NGX_OBJS/src/http $NGX_OBJS/src/http/v2 $NGX_OBJS/src/http/modules \
+ $NGX_OBJS/src/http $NGX_OBJS/src/http/v2 $NGX_OBJS/src/http/v3 \
+ $NGX_OBJS/src/http/modules \
$NGX_OBJS/src/http/modules/perl \
$NGX_OBJS/src/mail \
$NGX_OBJS/src/stream \
diff --git a/auto/modules b/auto/modules
index 09bfcb08d..2b2e6a889 100644
--- a/auto/modules
+++ b/auto/modules
@@ -134,6 +134,7 @@ if [ $HTTP = YES ]; then
# ngx_http_header_filter
# ngx_http_chunked_filter
# ngx_http_v2_filter
+ # ngx_http_v3_filter
# ngx_http_range_header_filter
# ngx_http_gzip_filter
# ngx_http_postpone_filter
@@ -166,6 +167,7 @@ if [ $HTTP = YES ]; then
ngx_http_header_filter_module \
ngx_http_chunked_filter_module \
ngx_http_v2_filter_module \
+ ngx_http_v3_filter_module \
ngx_http_range_header_filter_module \
ngx_http_gzip_filter_module \
ngx_http_postpone_filter_module \
@@ -227,6 +229,17 @@ if [ $HTTP = YES ]; then
. auto/module
fi
+ if [ $HTTP_V3 = YES ]; then
+ ngx_module_name=ngx_http_v3_filter_module
+ ngx_module_incs=
+ ngx_module_deps=
+ ngx_module_srcs=src/http/v3/ngx_http_v3_filter_module.c
+ ngx_module_libs=
+ ngx_module_link=$HTTP_V3
+
+ . auto/module
+ fi
+
if :; then
ngx_module_name=ngx_http_range_header_filter_module
ngx_module_incs=
@@ -438,6 +451,24 @@ if [ $HTTP = YES ]; then
. auto/module
fi
+ if [ $HTTP_V3 = YES ]; then
+ USE_QUICHE=YES
+ USE_OPENSSL=YES
+ have=NGX_HTTP_V3 . auto/have
+ have=NGX_HTTP_HEADERS . auto/have
+
+ ngx_module_name=ngx_http_v3_module
+ ngx_module_incs=src/http/v3
+ ngx_module_deps="src/http/v3/ngx_http_v3.h \
+ src/http/v3/ngx_http_v3_module.h"
+ ngx_module_srcs="src/http/v3/ngx_http_v3.c \
+ src/http/v3/ngx_http_v3_module.c"
+ ngx_module_libs=
+ ngx_module_link=$HTTP_V3
+
+ . auto/module
+ fi
+
if :; then
ngx_module_name=ngx_http_static_module
ngx_module_incs=
@@ -1268,6 +1299,19 @@ if [ $USE_OPENSSL = YES ]; then
fi
+if [ $USE_QUICHE = YES ]; then
+ ngx_module_type=CORE
+ ngx_module_name=ngx_quic_module
+ ngx_module_incs=
+ ngx_module_deps=src/event/ngx_event_quic.h
+ ngx_module_srcs=src/event/ngx_event_quic.c
+ ngx_module_libs=
+ ngx_module_link=YES
+
+ . auto/module
+fi
+
+
if [ $USE_PCRE = YES ]; then
ngx_module_type=CORE
ngx_module_name=ngx_regex_module
diff --git a/auto/options b/auto/options
index d8b421b0f..6b443f048 100644
--- a/auto/options
+++ b/auto/options
@@ -59,6 +59,7 @@ HTTP_CHARSET=YES
HTTP_GZIP=YES
HTTP_SSL=NO
HTTP_V2=NO
+HTTP_V3=NO
HTTP_SSI=YES
HTTP_POSTPONE=NO
HTTP_REALIP=NO
@@ -148,6 +149,9 @@ PCRE_JIT=NO
USE_OPENSSL=NO
OPENSSL=NONE
+USE_QUICHE=NO
+QUICHE=NONE
+
USE_ZLIB=NO
ZLIB=NONE
ZLIB_OPT=
@@ -225,6 +229,7 @@ $0: warning: the \"--with-ipv6\" option is deprecated"
--with-http_ssl_module) HTTP_SSL=YES ;;
--with-http_v2_module) HTTP_V2=YES ;;
+ --with-http_v3_module) HTTP_V3=YES ;;
--with-http_realip_module) HTTP_REALIP=YES ;;
--with-http_addition_module) HTTP_ADDITION=YES ;;
--with-http_xslt_module) HTTP_XSLT=YES ;;
@@ -358,6 +363,9 @@ use the \"--with-mail_ssl_module\" option instead"
--with-openssl=*) OPENSSL="$value" ;;
--with-openssl-opt=*) OPENSSL_OPT="$value" ;;
+ --with-quiche=*) QUICHE="$value" ;;
+ --with-quiche-opt=*) QUICHE_OPT="$value" ;;
+
--with-md5=*)
NGX_POST_CONF_MSG="$NGX_POST_CONF_MSG
$0: warning: the \"--with-md5\" option is deprecated"
@@ -440,6 +448,7 @@ cat << END
--with-http_ssl_module enable ngx_http_ssl_module
--with-http_v2_module enable ngx_http_v2_module
+ --with-http_v3_module enable ngx_http_v3_module
--with-http_realip_module enable ngx_http_realip_module
--with-http_addition_module enable ngx_http_addition_module
--with-http_xslt_module enable ngx_http_xslt_module
diff --git a/src/core/ngx_connection.h b/src/core/ngx_connection.h
index 54059629e..7df8d4136 100644
--- a/src/core/ngx_connection.h
+++ b/src/core/ngx_connection.h
@@ -79,6 +79,9 @@ struct ngx_listening_s {
unsigned deferred_accept:1;
unsigned delete_deferred:1;
unsigned add_deferred:1;
+#if (NGX_QUIC)
+ unsigned quic:1;
+#endif
#if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)
char *accept_filter;
#endif
@@ -156,6 +159,10 @@ struct ngx_connection_s {
ngx_udp_connection_t *udp;
+#if (NGX_QUIC)
+ ngx_quic_connection_t *quic;
+#endif
+
struct sockaddr *local_sockaddr;
socklen_t local_socklen;
diff --git a/src/core/ngx_core.h b/src/core/ngx_core.h
index 93ca9174d..d0441f034 100644
--- a/src/core/ngx_core.h
+++ b/src/core/ngx_core.h
@@ -82,6 +82,9 @@ typedef void (*ngx_connection_handler_pt)(ngx_connection_t *c);
#if (NGX_OPENSSL)
#include <ngx_event_openssl.h>
#endif
+#if (NGX_QUIC)
+#include <ngx_event_quic.h>
+#endif
#include <ngx_process_cycle.h>
#include <ngx_conf_file.h>
#include <ngx_module.h>
diff --git a/src/event/ngx_event_quic.c b/src/event/ngx_event_quic.c
new file mode 100644
index 000000000..591a809e0
--- /dev/null
+++ b/src/event/ngx_event_quic.c
@@ -0,0 +1,620 @@
+
+/*
+ * Copyright (C) Cloudflare, Inc.
+ */
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_event.h>
+
+
+/* Limit outgoing packets to 1200 bytes. This is the minimum value allowed. */
+#define MAX_DATAGRAM_SIZE 1200
+
+/* errors */
+#define NGX_QUIC_NO_ERROR 0x0
+#define NGX_QUIC_INTERNAL_ERROR 0x1
+
+
+static void ngx_quic_read_handler(ngx_event_t *ev);
+static void ngx_quic_write_handler(ngx_event_t *ev);
+
+static void ngx_quic_set_timer(ngx_connection_t *c);
+
+static void ngx_quic_handshake_completed(ngx_connection_t *c);
+
+static void ngx_quic_shutdown_handler(ngx_event_t *ev);
+
+static void ngx_quic_finalize_connection(ngx_connection_t *c, ngx_uint_t status);
+static void ngx_quic_close_connection(ngx_connection_t *c);
+
+static ngx_int_t ngx_quic_send_udp_packet(ngx_connection_t *c, uint8_t *buf,
+ size_t len);
+
+
+static ngx_command_t ngx_quic_commands[] = {
+
+ ngx_null_command
+};
+
+
+static ngx_core_module_t ngx_quic_module_ctx = {
+ ngx_string("quic"),
+ NULL,
+ NULL
+};
+
+
+ngx_module_t ngx_quic_module = {
+ NGX_MODULE_V1,
+ &ngx_quic_module_ctx, /* module context */
+ ngx_quic_commands, /* module directives */
+ NGX_CORE_MODULE, /* module type */
+ NULL, /* init master */
+ NULL, /* init module */
+ NULL, /* init process */
+ NULL, /* init thread */
+ NULL, /* exit thread */
+ NULL, /* exit process */
+ NULL, /* exit master */
+ NGX_MODULE_V1_PADDING
+};
+
+
+ngx_int_t
+ngx_quic_create_conf(ngx_quic_t *quic)
+{
+ quic->config = quiche_config_new(QUICHE_PROTOCOL_VERSION);
+ if (quic->config == NULL) {
+ ngx_log_error(NGX_LOG_EMERG, quic->log, 0, "failed to create quic config");
+ return NGX_ERROR;
+ }
+
+ return NGX_OK;
+}
+
+
+ngx_int_t
+ngx_quic_validate_initial(ngx_event_t *ev, u_char *buf, ssize_t buf_len)
+{
+ /* Check incoming packet type, if it's not Initial we shouldn't be here. */
+ if (((buf[0] & 0x30) >> 4) != 0) {
+ ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, 0,
+ "packet is not quic client initial");
+ return NGX_ERROR;
+ }
+
+ /* Client Initial packets must be at least 1200 bytes. */
+ if (buf_len < QUICHE_MIN_CLIENT_INITIAL_LEN) {
+ ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, 0,
+ "quic initial packet is too short");
+ return NGX_ERROR;
+ }
+
+ return NGX_OK;
+}
+
+
+ngx_int_t
+ngx_quic_create_connection(ngx_quic_t *quic, ngx_connection_t *c)
+{
+ int rc;
+ u_char *buf;
+ size_t buf_len;
+ quiche_conn *conn;
+ static uint8_t out[MAX_DATAGRAM_SIZE];
+
+ uint8_t pkt_type;
+ uint32_t pkt_version;
+
+ uint8_t scid[QUICHE_MAX_CONN_ID_LEN];
+ size_t scid_len = sizeof(scid);
+
+ uint8_t dcid[QUICHE_MAX_CONN_ID_LEN];
+ size_t dcid_len = sizeof(dcid);
+
+ uint8_t token[1];
+ size_t token_len = sizeof(token);
+
+ ngx_quic_connection_t *qc;
+
+ ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic init connection");
+
+ /* Extract some fields from the client's Initial packet, which was saved
+ * into c->buffer by ngx_event_recvmsg(). */
+ buf = c->buffer->pos;
+ buf_len = ngx_buf_size(c->buffer);
+
+ rc = quiche_header_info(buf, buf_len, QUICHE_MAX_CONN_ID_LEN,
+ &pkt_version, &pkt_type,
+ scid, &scid_len, dcid, &dcid_len,
+ token, &token_len);
+ if (rc < 0) {
+ ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
+ "failed to parse quic header: %d", rc);
+ return NGX_ERROR;
+ }
+
+ /* Version mismatch, do version negotiation. */
+ if (!quiche_version_is_supported(pkt_version)) {
+ ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
+ "quic version negotiation");
+
+ ssize_t written = quiche_negotiate_version(scid, scid_len,
+ dcid, dcid_len,
+ out, sizeof(out));
+
+ if (written < 0) {
+ ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
+ "failed to create quic vneg packet: %d", written);
+ return NGX_ERROR;
+ }
+
+ if (ngx_quic_send_udp_packet(c, out, written) == NGX_ERROR) {
+ return NGX_ERROR;
+ }
+
+ return NGX_DONE;
+ }
+
+ /* Initialize source connection ID with some random bytes. */
+ RAND_bytes(scid, sizeof(scid));
+
+#if (NGX_DEBUG)
+ {
+ uint8_t dcid_hex[QUICHE_MAX_CONN_ID_LEN * 2],
+ scid_hex[QUICHE_MAX_CONN_ID_LEN * 2];
+
+ ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0,
+ "new quic connection dcid:%*.s new_scid:%*.s",
+ ngx_hex_dump(dcid_hex, dcid, dcid_len) - dcid_hex, dcid_hex,
+ ngx_hex_dump(scid_hex, scid, sizeof(scid)) - scid_hex, scid_hex);
+ }
+#endif
+
+ conn = quiche_conn_new_with_tls(scid, sizeof(scid), NULL, 0,
+ c->sockaddr, c->socklen, quic->config,
+ c->ssl->connection, true);
+ if (conn == NULL) {
+ ngx_log_error(NGX_LOG_ERR, c->log, 0, "failed to create quic connection");
+ return NGX_ERROR;
+ }
+
+ qc = ngx_pcalloc(c->pool, sizeof(ngx_quic_connection_t));
+ if (qc == NULL) {
+ quiche_conn_free(conn);
+ return NGX_ERROR;
+ }
+
+ qc->handler = NULL;
+
+ qc->conn = conn;
+
+ c->quic = qc;
+
+ return NGX_OK;
+}
+
+
+ngx_int_t
+ngx_quic_handshake(ngx_connection_t *c)
+{
+ u_char *buf;
+ size_t buf_len;
+ ssize_t done;
+
+ quiche_recv_info recv_info = {
+ c->sockaddr,
+ c->socklen,
+ };
+
+ /* Process the client's Initial packet, which was saved into c->buffer by
+ * ngx_event_recvmsg(). */
+ buf = c->buffer->pos;
+ buf_len = ngx_buf_size(c->buffer);
+
+ done = quiche_conn_recv(c->quic->conn, buf, buf_len, &recv_info);
+
+ if ((done < 0) && (done != QUICHE_ERR_DONE)) {
+ ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
+ "failed to process quic packet: %d", done);
+ return NGX_ERROR;
+ }
+
+ c->read->handler = ngx_quic_read_handler;
+ c->write->handler = ngx_quic_write_handler;
+
+ ngx_post_event(c->write, &ngx_posted_events);
+
+ return NGX_AGAIN;
+}
+
+
+static void
+ngx_quic_read_handler(ngx_event_t *rev)
+{
+ int n;
+ static uint8_t buf[65535];
+ ngx_connection_t *c;
+
+ c = rev->data;
+
+ c->log->action = "reading QUIC packets";
+
+ ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic read handler");
+
+ if (rev->timedout) {
+ ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
+ "quic connection timed out");
+
+ if (c->quic->handler != NULL) {
+ c->quic->handler(c);
+ }
+
+ return;
+ }
+
+ for (;;) {
+ n = c->recv(c, buf, sizeof(buf));
+ if (n == NGX_AGAIN) {
+ break;
+ }
+
+ if (n == NGX_ERROR) {
+ ngx_quic_finalize_connection(c, NGX_QUIC_INTERNAL_ERROR);
+ return;
+ }
+
+ quiche_recv_info recv_info = {
+ c->sockaddr,
+ c->socklen,
+ };
+
+ ssize_t done = quiche_conn_recv(c->quic->conn, buf, n, &recv_info);
+
+ if (done == QUICHE_ERR_DONE) {
+ break;
+ }
+
+ if (done < 0) {
+ ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
+ "failed to process quic packet: %d", done);
+
+ ngx_quic_finalize_connection(c, NGX_QUIC_INTERNAL_ERROR);
+ return;
+ }
+ }
+
+ if (quiche_conn_is_in_early_data(c->quic->conn) ||
+ quiche_conn_is_established(c->quic->conn)) {
+ if (!c->ssl->handshaked) {
+ ngx_quic_handshake_completed(c);
+ }
+
+ if ((c->quic == NULL) || (c->quic->handler == NULL)) {
+ return;
+ }
+
+ /* Notify application layer that there might be stream data to read. */
+ c->quic->handler(c);
+ }
+
+ ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic done reading");
+
+ ngx_post_event(c->write, &ngx_posted_events);
+}
+
+
+static void
+ngx_quic_write_handler(ngx_event_t *wev)
+{
+ ngx_connection_t *c;
+ quiche_send_info send_info;
+ static uint8_t out[MAX_DATAGRAM_SIZE];
+
+ c = wev->data;
+
+ c->log->action = "writing QUIC packets";
+
+ ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic write handler");
+
+ if (wev->timedout) {
+ ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic alarm fired");
+
+ quiche_conn_on_timeout(c->quic->conn);
+ }
+
+ if (quiche_conn_is_closed(c->quic->conn)) {
+ ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
+ "quic connection is closed");
+
+ ngx_quic_finalize_connection(c, NGX_QUIC_NO_ERROR);
+ return;
+ }
+
+ for (;;) {
+ ssize_t written = quiche_conn_send(c->quic->conn, out, sizeof(out),
+ &send_info);
+
+ if (written == QUICHE_ERR_DONE) {
+ ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic done writing");
+ break;
+ }
+
+ if (written < 0) {
+ ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
+ "failed to create quic packet: %d", written);
+
+ ngx_quic_finalize_connection(c, NGX_QUIC_INTERNAL_ERROR);
+ return;
+ }
+
+ int rc = ngx_quic_send_udp_packet(c, out, written);
+
+ if (rc == NGX_AGAIN) {
+ break;
+ }
+
+ if (rc == NGX_ERROR) {
+ ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
+ "failed to send quic packet");
+
+ ngx_quic_finalize_connection(c, NGX_QUIC_INTERNAL_ERROR);
+ return;
+ }
+ }
+
+ ngx_quic_set_timer(c);
+}
+
+
+static void
+ngx_quic_set_timer(ngx_connection_t *c)
+{
+ uint64_t expiry;
+ ngx_event_t *wev;
+
+ wev = c->write;
+
+ expiry = quiche_conn_timeout_as_millis(c->quic->conn);
+ expiry = ngx_max(expiry, 1);
+
+ if (wev->timer_set) {
+ ngx_del_timer(wev);
+ }
+
+ /* quiche_conn_timeout_as_millis() will return UINT64_MAX when the timer
+ * should be unset (this would be equvalent to returning Option::None in
+ * Rust). To avoid overflow we need to explicitly check for this value. */
+ if (expiry != UINT64_MAX) {
+ ngx_add_timer(wev, (ngx_msec_t)expiry);
+ }
+}
+
+
+static void
+ngx_quic_handshake_completed(ngx_connection_t *c)
+{
+#if (NGX_DEBUG)
+ {
+ char buf[129], *s, *d;
+#if OPENSSL_VERSION_NUMBER >= 0x10000000L
+ const
+#endif
+ SSL_CIPHER *cipher;
+
+ cipher = SSL_get_current_cipher(c->ssl->connection);
+
+ if (cipher) {
+ SSL_CIPHER_description(cipher, &buf[1], 128);
+
+ for (s = &buf[1], d = buf; *s; s++) {
+ if (*s == ' ' && *d == ' ') {
+ continue;
+ }
+
+ if (*s == LF || *s == CR) {
+ continue;
+ }
+
+ *++d = *s;
+ }
+
+ if (*d != ' ') {
+ d++;
+ }
+
+ *d = '\0';
+
+ ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
+ "QUIC: %s, cipher: \"%s\"",
+ SSL_get_version(c->ssl->connection), &buf[1]);
+
+ if (SSL_session_reused(c->ssl->connection)) {
+ ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
+ "quic reused session");
+ }
+
+ } else {
+ ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
+ "quic no shared ciphers");
+ }
+ }
+#endif
+
+ ngx_del_timer(c->read);
+
+ c->ssl->handshaked = 1;
+
+ /* Notify application layer that the handshake is complete. */
+ c->ssl->handler(c);
+}
+
+
+ngx_int_t
+ngx_quic_shutdown(ngx_connection_t *c)
+{
+ ssize_t written;
+ quiche_send_info send_info;
+ static uint8_t out[MAX_DATAGRAM_SIZE];
+
+ /* Connection is closed, free memory. */
+ if (quiche_conn_is_closed(c->quic->conn)) {
+ ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "free quic connection");
+
+ quiche_conn_free(c->quic->conn);
+
+ c->quic = NULL;
+ c->ssl = NULL;
+
+ return NGX_OK;
+ }
+
+ /* We can't free the connection state yet, as we need to wait for the
+ * draining timeout to expire.
+ *
+ * Setup event handlers such that we will try again when that happens (or
+ * when another event is triggered). */
+ c->read->handler = ngx_quic_shutdown_handler;
+ c->write->handler = ngx_quic_shutdown_handler;
+
+ /* Try sending a packet in order to flush pending frames (CONNECTION_CLOSE
+ * for example), but ignore errors as we are already closing the connection
+ * anyway. */
+ written = quiche_conn_send(c->quic->conn, out, sizeof(out), &send_info);
+
+ if (written > 0) {
+ ngx_quic_send_udp_packet(c, out, written);
+ }
+
+ ngx_quic_set_timer(c);
+
+ return NGX_AGAIN;
+}
+
+
+static void
+ngx_quic_shutdown_handler(ngx_event_t *ev)
+{
+ ngx_connection_t *c;
+ ngx_connection_handler_pt handler;
+
+ ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, 0, "quic shutdown handler");
+
+ c = ev->data;
+ handler = c->quic->handler;
+
+ if (ev->timedout) {
+ ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic alarm fired");
+
+ quiche_conn_on_timeout(c->quic->conn);
+ }
+
+ if (ngx_quic_shutdown(c) == NGX_AGAIN) {
+ return;
+ }
+
+ handler(c);
+}
+
+
+static void
+ngx_quic_finalize_connection(ngx_connection_t *c, ngx_uint_t status)
+{
+ ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
+ "finalize quic connection: %d", c->fd);
+
+ c->error = 1;
+
+ if (quiche_conn_is_closed(c->quic->conn)) {
+ c->close = 1;
+ }
+
+ quiche_conn_close(c->quic->conn, false, status, NULL, 0);
+
+ /* Notify the application layer that the connection is in an error
+ * state and will be closed. */
+ if (c->quic->handler != NULL) {
+ c->quic->handler(c);
+ return;
+ }
+
+ ngx_quic_close_connection(c);
+}
+
+
+static void
+ngx_quic_close_connection(ngx_connection_t *c)
+{
+ ngx_pool_t *pool;
+
+ ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
+ "close quic connection: %d", c->fd);
+
+ if (c->quic) {
+ if (ngx_quic_shutdown(c) == NGX_AGAIN) {
+ c->quic->handler = ngx_quic_close_connection;
+ return;
+ }
+ }
+
+#if (NGX_STAT_STUB)
+ (void) ngx_atomic_fetch_add(ngx_stat_active, -1);
+#endif
+
+ c->destroyed = 1;
+
+ pool = c->pool;
+
+ ngx_close_connection(c);
+
+ ngx_destroy_pool(pool);
+}
+
+
+void
+ngx_quic_cleanup_ctx(void *data)
+{
+ ngx_quic_t *quic = data;
+
+ quiche_config_free(quic->config);
+}
+
+
+static ngx_int_t
+ngx_quic_send_udp_packet(ngx_connection_t *c, uint8_t *buf, size_t len)
+{
+ ngx_buf_t out_buf = {0};
+ ngx_chain_t out_chain = {0};
+ ngx_chain_t *cl;
+
+ /* The send_chain() API takes an ngx_chain_t parameter instead of a simple
+ * buffer, so we need to initialize the chain such that it contains only a
+ * single buffer.
+ *
+ * The c->send_chain() call is required (instead of just c->send()) because
+ * it uses the sendmsg(2) syscall (instead of sendto(2)), which allows us to
+ * specify the correct source IP address for the connection. */
+
+ out_buf.start = out_buf.pos = buf;
+ out_buf.end = out_buf.last = buf + len;
+ out_buf.memory = 1;
+ out_buf.flush = 1;
+
+ out_chain.buf = &out_buf;
+ out_chain.next = NULL;
+
+ c->write->ready = 1;
+
+ cl = c->send_chain(c, &out_chain, 0);
+
+ if (cl != NULL) {
+ return NGX_AGAIN;
+ }
+
+ if (cl == NGX_CHAIN_ERROR) {
+ return NGX_ERROR;
+ }
+
+ return NGX_OK;
+}
diff --git a/src/event/ngx_event_quic.h b/src/event/ngx_event_quic.h
new file mode 100644
index 000000000..b44a96320
--- /dev/null
+++ b/src/event/ngx_event_quic.h
@@ -0,0 +1,49 @@
+
+/*
+ * Copyright (C) Cloudflare, Inc.
+ */
+
+
+#ifndef _NGX_EVENT_QUIC_H_INCLUDED_
+#define _NGX_EVENT_QUIC_H_INCLUDED_
+
+
+#include <stdbool.h>
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+
+#include <quiche.h>
+
+typedef struct ngx_quic_s ngx_quic_t;
+typedef struct ngx_quic_connection_s ngx_quic_connection_t;
+
+struct ngx_quic_s {
+ quiche_config *config;
+ ngx_log_t *log;
+};
+
+struct ngx_quic_connection_s {
+ quiche_conn *conn;
+