Merging upstream version 1.60.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

15 files changed, 103 insertions, 112 deletions

diff --git a/doc/Makefile.am b/doc/Makefile.am
index 7d7f31c..51945e4 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -42,7 +42,9 @@ APIDOCS= \
 	nghttp2_hd_deflate_get_num_table_entries.rst \
 	nghttp2_hd_deflate_get_table_entry.rst \
 	nghttp2_hd_deflate_hd.rst \
+	nghttp2_hd_deflate_hd2.rst \
 	nghttp2_hd_deflate_hd_vec.rst \
+	nghttp2_hd_deflate_hd_vec2.rst \
 	nghttp2_hd_deflate_new.rst \
 	nghttp2_hd_deflate_new2.rst \
 	nghttp2_hd_inflate_change_table_size.rst \
@@ -54,6 +56,7 @@ APIDOCS= \
 	nghttp2_hd_inflate_get_table_entry.rst \
 	nghttp2_hd_inflate_hd.rst \
 	nghttp2_hd_inflate_hd2.rst \
+	nghttp2_hd_inflate_hd3.rst \
 	nghttp2_hd_inflate_new.rst \
 	nghttp2_hd_inflate_new2.rst \
 	nghttp2_http2_strerror.rst \
@@ -78,6 +81,7 @@ APIDOCS= \
 	nghttp2_option_set_max_settings.rst \
 	nghttp2_option_set_stream_reset_rate_limit.rst \
 	nghttp2_pack_settings_payload.rst \
+	nghttp2_pack_settings_payload2.rst \
 	nghttp2_priority_spec_check_default.rst \
 	nghttp2_priority_spec_default_init.rst \
 	nghttp2_priority_spec_init.rst \
@@ -91,6 +95,7 @@ APIDOCS= \
 	nghttp2_session_callbacks_new.rst \
 	nghttp2_session_callbacks_set_before_frame_send_callback.rst \
 	nghttp2_session_callbacks_set_data_source_read_length_callback.rst \
+	nghttp2_session_callbacks_set_data_source_read_length_callback2.rst \
 	nghttp2_session_callbacks_set_error_callback.rst \
 	nghttp2_session_callbacks_set_error_callback2.rst \
 	nghttp2_session_callbacks_set_on_begin_frame_callback.rst \
@@ -107,9 +112,13 @@ APIDOCS= \
 	nghttp2_session_callbacks_set_on_invalid_header_callback2.rst \
 	nghttp2_session_callbacks_set_on_stream_close_callback.rst \
 	nghttp2_session_callbacks_set_pack_extension_callback.rst \
+	nghttp2_session_callbacks_set_pack_extension_callback2.rst \
 	nghttp2_session_callbacks_set_recv_callback.rst \
+	nghttp2_session_callbacks_set_recv_callback2.rst \
 	nghttp2_session_callbacks_set_select_padding_callback.rst \
+	nghttp2_session_callbacks_set_select_padding_callback2.rst \
 	nghttp2_session_callbacks_set_send_callback.rst \
+	nghttp2_session_callbacks_set_send_callback2.rst \
 	nghttp2_session_callbacks_set_send_data_callback.rst \
 	nghttp2_session_callbacks_set_unpack_extension_callback.rst \
 	nghttp2_session_change_extpri_stream_priority.rst \
@@ -146,7 +155,9 @@ APIDOCS= \
 	nghttp2_session_get_stream_remote_window_size.rst \
 	nghttp2_session_get_stream_user_data.rst \
 	nghttp2_session_mem_recv.rst \
+	nghttp2_session_mem_recv2.rst \
 	nghttp2_session_mem_send.rst \
+	nghttp2_session_mem_send2.rst \
 	nghttp2_session_recv.rst \
 	nghttp2_session_resume_data.rst \
 	nghttp2_session_send.rst \
@@ -174,6 +185,7 @@ APIDOCS= \
 	nghttp2_strerror.rst \
 	nghttp2_submit_altsvc.rst \
 	nghttp2_submit_data.rst \
+	nghttp2_submit_data2.rst \
 	nghttp2_submit_extension.rst \
 	nghttp2_submit_goaway.rst \
 	nghttp2_submit_headers.rst \
@@ -183,7 +195,9 @@ APIDOCS= \
 	nghttp2_submit_priority_update.rst \
 	nghttp2_submit_push_promise.rst \
 	nghttp2_submit_request.rst \
+	nghttp2_submit_request2.rst \
 	nghttp2_submit_response.rst \
+	nghttp2_submit_response2.rst \
 	nghttp2_submit_rst_stream.rst \
 	nghttp2_submit_settings.rst \
 	nghttp2_submit_shutdown_notice.rst \
@@ -212,7 +226,6 @@ EXTRA_DIST = \
 	sources/h2load-howto.rst \
 	sources/building-android-binary.rst \
 	sources/contribute.rst \
-	sources/security.rst \
 	_exts/rubydomain/LICENSE.rubydomain \
 	_exts/rubydomain/__init__.py \
 	_exts/rubydomain/rubydomain.py \
diff --git a/doc/README.rst b/doc/README.rst
index 549e550..7d4809c 100644
--- a/doc/README.rst
+++ b/doc/README.rst
@@ -68,7 +68,7 @@ The example follows::
      * Callback function invoked when |session| wants to send data to
      * remote peer.
      */
-    typedef ssize_t (*nghttp2_send_callback)
+    typedef nghttp2_ssize (*nghttp2_send_callback2)
     (nghttp2_session *session,
      const uint8_t *data, size_t length, int flags, void *user_data);
 
diff --git a/doc/bash_completion/h2load b/doc/bash_completion/h2load
index 2b2d4ab..e07d753 100644
--- a/doc/bash_completion/h2load
+++ b/doc/bash_completion/h2load
@@ -8,7 +8,7 @@ _h2load()
     _get_comp_words_by_ref cur prev
     case $cur in
         -*)
-            COMPREPLY=( $( compgen -W '--requests --clients --threads --input-file --max-concurrent-streams --max-frame-size --window-bits --connection-window-bits --header --ciphers --tls13-ciphers --no-tls-proto --data --rate --rate-period --duration --warm-up-time --connection-active-timeout --connection-inactivity-timeout --timing-script-file --base-uri --alpn-list --h1 --header-table-size --encoder-header-table-size --log-file --qlog-file-base --connect-to --rps --groups --no-udp-gso --max-udp-payload-size --ktls --verbose --version --help ' -- "$cur" ) )
+            COMPREPLY=( $( compgen -W '--requests --clients --threads --input-file --max-concurrent-streams --max-frame-size --window-bits --connection-window-bits --header --ciphers --tls13-ciphers --no-tls-proto --data --rate --rate-period --duration --warm-up-time --connection-active-timeout --connection-inactivity-timeout --timing-script-file --base-uri --alpn-list --h1 --header-table-size --encoder-header-table-size --log-file --qlog-file-base --connect-to --rps --groups --no-udp-gso --max-udp-payload-size --ktls --sni --verbose --version --help ' -- "$cur" ) )
             ;;
         *)
             _filedir
diff --git a/doc/h2load.1 b/doc/h2load.1
index df052ab..09cdcf3 100644
--- a/doc/h2load.1
+++ b/doc/h2load.1
@@ -27,7 +27,7 @@ level margin: \\n[rst2man-indent\\n[rst2man-indent-level]]
 .\" new: \\n[rst2man-indent\\n[rst2man-indent-level]]
 .in \\n[rst2man-indent\\n[rst2man-indent-level]]u
 ..
-.TH "H2LOAD" "1" "Jan 21, 2024" "1.59.0" "nghttp2"
+.TH "H2LOAD" "1" "Mar 01, 2024" "1.60.0" "nghttp2"
 .SH NAME
 h2load \- HTTP/2 benchmarking tool
 .SH SYNOPSIS
@@ -344,6 +344,12 @@ Enable ktls.
 .UNINDENT
 .INDENT 0.0
 .TP
+.B \-\-sni=<DNSNAME>
+Send  <DNSNAME> in  TLS  SNI, overriding  the host  name
+specified in URI.
+.UNINDENT
+.INDENT 0.0
+.TP
 .B \-v, \-\-verbose
 Output debug information.
 .UNINDENT
diff --git a/doc/h2load.1.rst b/doc/h2load.1.rst
index 85ed651..d63a839 100644
--- a/doc/h2load.1.rst
+++ b/doc/h2load.1.rst
@@ -290,6 +290,11 @@ OPTIONS
 
     Enable ktls.
 
+.. option:: --sni=<DNSNAME>
+
+    Send  <DNSNAME> in  TLS  SNI, overriding  the host  name
+    specified in URI.
+
 .. option:: -v, --verbose
 
     Output debug information.
diff --git a/doc/nghttp.1 b/doc/nghttp.1
index 332d9c6..231e5a4 100644
--- a/doc/nghttp.1
+++ b/doc/nghttp.1
@@ -27,7 +27,7 @@ level margin: \\n[rst2man-indent\\n[rst2man-indent-level]]
 .\" new: \\n[rst2man-indent\\n[rst2man-indent-level]]
 .in \\n[rst2man-indent\\n[rst2man-indent-level]]u
 ..
-.TH "NGHTTP" "1" "Jan 21, 2024" "1.59.0" "nghttp2"
+.TH "NGHTTP" "1" "Mar 01, 2024" "1.60.0" "nghttp2"
 .SH NAME
 nghttp \- HTTP/2 client
 .SH SYNOPSIS
diff --git a/doc/nghttpd.1 b/doc/nghttpd.1
index 219a365..93a990d 100644
--- a/doc/nghttpd.1
+++ b/doc/nghttpd.1
@@ -27,7 +27,7 @@ level margin: \\n[rst2man-indent\\n[rst2man-indent-level]]
 .\" new: \\n[rst2man-indent\\n[rst2man-indent-level]]
 .in \\n[rst2man-indent\\n[rst2man-indent-level]]u
 ..
-.TH "NGHTTPD" "1" "Jan 21, 2024" "1.59.0" "nghttp2"
+.TH "NGHTTPD" "1" "Mar 01, 2024" "1.60.0" "nghttp2"
 .SH NAME
 nghttpd \- HTTP/2 server
 .SH SYNOPSIS
diff --git a/doc/nghttpx.1 b/doc/nghttpx.1
index e9742a5..ba40059 100644
--- a/doc/nghttpx.1
+++ b/doc/nghttpx.1
@@ -27,7 +27,7 @@ level margin: \\n[rst2man-indent\\n[rst2man-indent-level]]
 .\" new: \\n[rst2man-indent\\n[rst2man-indent-level]]
 .in \\n[rst2man-indent\\n[rst2man-indent-level]]u
 ..
-.TH "NGHTTPX" "1" "Jan 21, 2024" "1.59.0" "nghttp2"
+.TH "NGHTTPX" "1" "Mar 01, 2024" "1.60.0" "nghttp2"
 .SH NAME
 nghttpx \- HTTP/2 proxy
 .SH SYNOPSIS
diff --git a/doc/programmers-guide.rst b/doc/programmers-guide.rst
index 820cd20..4bf5e28 100644
--- a/doc/programmers-guide.rst
+++ b/doc/programmers-guide.rst
@@ -40,28 +40,28 @@ most event-based architecture applications use is single thread per
 core, and handling one connection I/O is done by single thread.
 
 To feed input to :type:`nghttp2_session` object, one can use
-`nghttp2_session_recv()` or `nghttp2_session_mem_recv()` functions.
+`nghttp2_session_recv()` or `nghttp2_session_mem_recv2()` functions.
 They behave similarly, and the difference is that
 `nghttp2_session_recv()` will use :type:`nghttp2_read_callback` to get
-input.  On the other hand, `nghttp2_session_mem_recv()` will take
-input as its parameter.  If in doubt, use `nghttp2_session_mem_recv()`
-since it is simpler, and could be faster since it avoids calling
-callback function.
+input.  On the other hand, `nghttp2_session_mem_recv2()` will take
+input as its parameter.  If in doubt, use
+`nghttp2_session_mem_recv2()` since it is simpler, and could be faster
+since it avoids calling callback function.
 
 To get output from :type:`nghttp2_session` object, one can use
-`nghttp2_session_send()` or `nghttp2_session_mem_send()`.  The
+`nghttp2_session_send()` or `nghttp2_session_mem_send2()`.  The
 difference between them is that the former uses
 :type:`nghttp2_send_callback` to pass output to an application.  On
 the other hand, the latter returns the output to the caller.  If in
-doubt, use `nghttp2_session_mem_send()` since it is simpler.  But
+doubt, use `nghttp2_session_mem_send2()` since it is simpler.  But
 `nghttp2_session_send()` might be easier to use if the output buffer
 an application has is fixed sized.
 
-In general, an application should call `nghttp2_session_mem_send()`
+In general, an application should call `nghttp2_session_mem_send2()`
 when it gets input from underlying connection.  Since there is great
 chance to get something pushed into transmission queue while the call
-of `nghttp2_session_mem_send()`, it is recommended to call
-`nghttp2_session_mem_recv()` after `nghttp2_session_mem_send()`.
+of `nghttp2_session_mem_send2()`, it is recommended to call
+`nghttp2_session_mem_recv2()` after `nghttp2_session_mem_send2()`.
 
 There is a question when we are safe to close HTTP/2 session without
 waiting for the closure of underlying connection.  We offer 2 API
@@ -70,7 +70,7 @@ calls for this: `nghttp2_session_want_read()` and
 can destroy :type:`nghttp2_session`, and then close the underlying
 connection.  But make sure that the buffered output has been
 transmitted to the peer before closing the connection when
-`nghttp2_session_mem_send()` is used, since
+`nghttp2_session_mem_send2()` is used, since
 `nghttp2_session_want_write()` does not take into account the
 transmission of the buffered data outside of :type:`nghttp2_session`.
 
@@ -87,18 +87,18 @@ The header files are also available online: :doc:`nghttp2.h` and
 Remarks
 -------
 
-Do not call `nghttp2_session_send()`, `nghttp2_session_mem_send()`,
-`nghttp2_session_recv()` or `nghttp2_session_mem_recv()` from the
+Do not call `nghttp2_session_send()`, `nghttp2_session_mem_send2()`,
+`nghttp2_session_recv()` or `nghttp2_session_mem_recv2()` from the
 nghttp2 callback functions directly or indirectly. It will lead to the
 crash.  You can submit requests or frames in the callbacks then call
 these functions outside the callbacks.
 
-`nghttp2_session_send()` and `nghttp2_session_mem_send()` send first
+`nghttp2_session_send()` and `nghttp2_session_mem_send2()` send first
 24 bytes of client magic string (MAGIC)
 (:macro:`NGHTTP2_CLIENT_MAGIC`) on client configuration.  The
 applications are responsible to send SETTINGS frame as part of
 connection preface using `nghttp2_submit_settings()`.  Similarly,
-`nghttp2_session_recv()` and `nghttp2_session_mem_recv()` consume
+`nghttp2_session_recv()` and `nghttp2_session_mem_recv2()` consume
 MAGIC on server configuration unless
 `nghttp2_option_set_no_recv_client_magic()` is used with nonzero
 option value.
@@ -222,7 +222,7 @@ above, the following code does not work:
 
 .. code-block:: c
 
-    nghttp2_submit_response(...)
+    nghttp2_submit_response2(...)
     nghttp2_submit_rst_stream(...)
 
 RST_STREAM cancels HEADERS (and DATA), and just RST_STREAM is sent.
@@ -258,9 +258,9 @@ For example, we will illustrate how to send `ALTSVC
       const char *field;
     } alt_svc;
 
-    ssize_t pack_extension_callback(nghttp2_session *session, uint8_t *buf,
-                                    size_t len, const nghttp2_frame *frame,
-                                    void *user_data) {
+    nghttp2_ssize pack_extension_callback(nghttp2_session *session, uint8_t *buf,
+                                          size_t len, const nghttp2_frame *frame,
+                                          void *user_data) {
       const alt_svc *altsvc = (const alt_svc *)frame->ext.payload;
       size_t originlen = strlen(altsvc->origin);
       size_t fieldlen = strlen(altsvc->field);
@@ -497,8 +497,8 @@ order to receive and process PRIORITY_UPDATE frame, server has to call
 NGHTTP2_PRIORITY_UPDATE)`` (see the above section), and pass the
 option to `nghttp2_session_server_new2()` or
 `nghttp2_session_server_new3()` to create a server session.  Client
-can send Priority header field via `nghttp2_submit_request()`.  It can
-also send PRIORITY_UPDATE frame via
+can send Priority header field via `nghttp2_submit_request2()`.  It
+can also send PRIORITY_UPDATE frame via
 `nghttp2_submit_priority_update()`.  Server processes Priority header
 field in a request header field and updates the stream priority unless
 HTTP messaging rule enforcement is disabled (see
diff --git a/doc/security.rst b/doc/security.rst
deleted file mode 100644
index 00b0c9c..0000000
--- a/doc/security.rst
+++ /dev/null
@@ -1 +0,0 @@
-.. include:: ../doc/sources/security.rst
diff --git a/doc/sources/index.rst b/doc/sources/index.rst
index b03c348..e181645 100644
--- a/doc/sources/index.rst
+++ b/doc/sources/index.rst
@@ -18,7 +18,6 @@ Contents:
 
    package_README
    contribute
-   security
    building-android-binary
    tutorial-client
    tutorial-server
diff --git a/doc/sources/security.rst b/doc/sources/security.rst
deleted file mode 100644
index 5a8fcd0..0000000
--- a/doc/sources/security.rst
+++ /dev/null
@@ -1,33 +0,0 @@
-Security Process
-================
-
-If you find a vulnerability in our software, please send the email to
-"tatsuhiro.t at gmail dot com" about its details instead of submitting
-issues on github issue page.  It is a standard practice not to
-disclose vulnerability information publicly until a fixed version is
-released, or mitigation is worked out.  In the future, we may setup a
-dedicated mail address for this purpose.
-
-If we identify that the reported issue is really a vulnerability, we
-open a new security advisory draft using `GitHub security feature
-<https://github.com/nghttp2/nghttp2/security>`_ and discuss the
-mitigation and bug fixes there.  The fixes are committed to the
-private repository.
-
-We write the security advisory and get CVE number from GitHub
-privately.  We also discuss the disclosure date to the public.
-
-We make a new release with the fix at the same time when the
-vulnerability is disclosed to public.
-
-At least 7 days before the public disclosure date, we open a new issue
-on `nghttp2 issue tracker
-<https://github.com/nghttp2/nghttp2/issues>`_ which notifies that the
-upcoming release will have a security fix.  The ``SECURITY`` label is
-attached to this kind of issue.  The issue is not opened if a
-vulnerability is already disclosed, and it is publicly known that
-nghttp2 is affected by that.
-
-Before few hours of new release, we merge the fixes to the master
-branch (and/or a release branch if necessary) and make a new release.
-Security advisory is disclosed on GitHub.
diff --git a/doc/sources/tutorial-client.rst b/doc/sources/tutorial-client.rst
index 95a6230..be6eb55 100644
--- a/doc/sources/tutorial-client.rst
+++ b/doc/sources/tutorial-client.rst
@@ -171,7 +171,7 @@ session object and several callbacks::
 
       nghttp2_session_callbacks_new(&callbacks);
 
-      nghttp2_session_callbacks_set_send_callback(callbacks, send_callback);
+      nghttp2_session_callbacks_set_send_callback2(callbacks, send_callback);
 
       nghttp2_session_callbacks_set_on_frame_recv_callback(callbacks,
                                                            on_frame_recv_callback);
@@ -246,8 +246,8 @@ HTTP request in the ``submit_request()`` function::
           MAKE_NV(":path", stream_data->path, stream_data->pathlen)};
       fprintf(stderr, "Request headers:\n");
       print_headers(stderr, hdrs, ARRLEN(hdrs));
-      stream_id = nghttp2_submit_request(session_data->session, NULL, hdrs,
-                                         ARRLEN(hdrs), NULL, stream_data);
+      stream_id = nghttp2_submit_request2(session_data->session, NULL, hdrs,
+                                          ARRLEN(hdrs), NULL, stream_data);
       if (stream_id < 0) {
         errx(1, "Could not submit HTTP request: %s", nghttp2_strerror(stream_id));
       }
@@ -258,11 +258,11 @@ HTTP request in the ``submit_request()`` function::
 We build the HTTP request header fields in ``hdrs``, which is an array
 of :type:`nghttp2_nv`. There are four header fields to be sent:
 ``:method``, ``:scheme``, ``:authority``, and ``:path``. To queue the
-HTTP request, we call `nghttp2_submit_request()`. The ``stream_data``
+HTTP request, we call `nghttp2_submit_request2()`. The ``stream_data``
 is passed via the *stream_user_data* parameter, which is helpfully
 later passed back to callback functions.
 
-`nghttp2_submit_request()` returns the newly assigned stream ID for
+`nghttp2_submit_request2()` returns the newly assigned stream ID for
 the request.
 
 The next bufferevent callback is ``readcb()``, which is invoked when
@@ -270,12 +270,12 @@ data is available to read from the bufferevent input buffer::
 
     static void readcb(struct bufferevent *bev, void *ptr) {
       http2_session_data *session_data = (http2_session_data *)ptr;
-      ssize_t readlen;
+      nghttp2_ssize readlen;
       struct evbuffer *input = bufferevent_get_input(bev);
       size_t datalen = evbuffer_get_length(input);
       unsigned char *data = evbuffer_pullup(input, -1);
 
-      readlen = nghttp2_session_mem_recv(session_data->session, data, datalen);
+      readlen = nghttp2_session_mem_recv2(session_data->session, data, datalen);
       if (readlen < 0) {
         warnx("Fatal error: %s", nghttp2_strerror((int)readlen));
         delete_http2_session_data(session_data);
@@ -293,8 +293,8 @@ data is available to read from the bufferevent input buffer::
     }
 
 In this function we feed all unprocessed, received data to the nghttp2
-session object using the `nghttp2_session_mem_recv()` function.
-`nghttp2_session_mem_recv()` processes the received data and may
+session object using the `nghttp2_session_mem_recv2()` function.
+`nghttp2_session_mem_recv2()` processes the received data and may
 invoke nghttp2 callbacks and queue frames for transmission.  Since
 there may be pending frames for transmission, we call immediately
 ``session_send()`` to send them.  ``session_send()`` is defined as
@@ -313,15 +313,16 @@ follows::
 
 The `nghttp2_session_send()` function serializes pending frames into
 wire format and calls the ``send_callback()`` function to send them.
-``send_callback()`` has type :type:`nghttp2_send_callback` and is
+``send_callback()`` has type :type:`nghttp2_send_callback2` and is
 defined as::
 
-    static ssize_t send_callback(nghttp2_session *session _U_, const uint8_t *data,
-                                 size_t length, int flags _U_, void *user_data) {
+    static nghttp2_ssize send_callback(nghttp2_session *session _U_,
+                                       const uint8_t *data, size_t length,
+                                       int flags _U_, void *user_data) {
       http2_session_data *session_data = (http2_session_data *)user_data;
       struct bufferevent *bev = session_data->bev;
       bufferevent_write(bev, data, length);
-      return (ssize_t)length;
+      return (nghttp2_ssize)length;
     }
 
 Since we use bufferevent to abstract network I/O, we just write the
diff --git a/doc/sources/tutorial-hpack.rst b/doc/sources/tutorial-hpack.rst
index 36e82d9..82acd94 100644
--- a/doc/sources/tutorial-hpack.rst
+++ b/doc/sources/tutorial-hpack.rst
@@ -24,11 +24,11 @@ deflater object for the dynamic header table.  If in doubt, just
 specify 4096 here, which is the default upper bound of dynamic header
 table buffer size.
 
-To encode header fields, use the `nghttp2_hd_deflate_hd()` function::
+To encode header fields, use the `nghttp2_hd_deflate_hd2()` function::
 
-    ssize_t nghttp2_hd_deflate_hd(nghttp2_hd_deflater *deflater,
-                                  uint8_t *buf, size_t buflen,
-                                  const nghttp2_nv *nva, size_t nvlen);
+    nghttp2_ssize nghttp2_hd_deflate_hd2(nghttp2_hd_deflater *deflater,
+                                         uint8_t *buf, size_t buflen,
+                                         const nghttp2_nv *nva, size_t nvlen);
 
 The *deflater* is the deflater object initialized by
 `nghttp2_hd_deflate_new()` described above. The encoded byte string is
@@ -44,7 +44,7 @@ cookies), set the :macro:`NGHTTP2_NV_FLAG_NO_INDEX` flag in
 sensitive header fields by compression based attacks: This is achieved
 by not inserting the header field into the dynamic header table.
 
-`nghttp2_hd_deflate_hd()` processes all headers given in *nva*.  The
+`nghttp2_hd_deflate_hd2()` processes all headers given in *nva*.  The
 *nva* must include all request or response header fields to be sent in
 one HEADERS (or optionally following (multiple) CONTINUATION
 frame(s)).  The *buf* must have enough space to store the encoded
@@ -55,13 +55,13 @@ of the encoded result length, use `nghttp2_hd_deflate_bound()`::
                                     const nghttp2_nv *nva, size_t nvlen);
 
 Pass this function the same parameters (*deflater*, *nva*, and
-*nvlen*) which will be passed to `nghttp2_hd_deflate_hd()`.
+*nvlen*) which will be passed to `nghttp2_hd_deflate_hd2()`.
 
-Subsequent calls to `nghttp2_hd_deflate_hd()` will use the current
+Subsequent calls to `nghttp2_hd_deflate_hd2()` will use the current
 encoder state and perform differential encoding, which yields HPAC's
 fundamental compression gain.
 
-If `nghttp2_hd_deflate_hd()` fails, the failure is fatal and any
+If `nghttp2_hd_deflate_hd2()` fails, the failure is fatal and any
 further calls with the same deflater object will fail.  Thus it's very
 important to use `nghttp2_hd_deflate_bound()` to determine the
 required size of the output buffer.
@@ -78,14 +78,14 @@ header data.  To initialize the object, use
 
     int nghttp2_hd_inflate_new(nghttp2_hd_inflater **inflater_ptr);
 
-To inflate header data, use `nghttp2_hd_inflate_hd2()`::
+To inflate header data, use `nghttp2_hd_inflate_hd3()`::
 
-    ssize_t nghttp2_hd_inflate_hd2(nghttp2_hd_inflater *inflater,
-                                   nghttp2_nv *nv_out, int *inflate_flags,
-                                   const uint8_t *in, size_t inlen,
-                                   int in_final);
+    nghttp2_ssize nghttp2_hd_inflate_hd3(nghttp2_hd_inflater *inflater,
+					 nghttp2_nv *nv_out, int *inflate_flags,
+					 const uint8_t *in, size_t inlen,
+					 int in_final);
 
-`nghttp2_hd_inflate_hd2()` reads a stream of bytes and outputs a
+`nghttp2_hd_inflate_hd3()` reads a stream of bytes and outputs a
 single header field at a time. Multiple calls are normally required to
 read a full stream of bytes and output all of the header fields.
 
@@ -119,7 +119,7 @@ If *in_final* is zero and the :macro:`NGHTTP2_HD_INFLATE_EMIT` flag is
 not set, it indicates that all given data was processed.  The caller
 is required to pass additional data.
 
-Example usage of `nghttp2_hd_inflate_hd2()` is shown in the
+Example usage of `nghttp2_hd_inflate_hd3()` is shown in the
 `inflate_header_block()` function in `deflate.c`_.
 
 Finally, to delete a :type:`nghttp2_hd_inflater` object, use
diff --git a/doc/sources/tutorial-server.rst b/doc/sources/tutorial-server.rst
index 41680bd..bf71296 100644
--- a/doc/sources/tutorial-server.rst
+++ b/doc/sources/tutorial-server.rst
@@ -220,7 +220,7 @@ session object and several callbacks::
 
       nghttp2_session_callbacks_new(&callbacks);
 
-      nghttp2_session_callbacks_set_send_callback(callbacks, send_callback);
+      nghttp2_session_callbacks_set_send_callback2(callbacks, send_callback);
 
       nghttp2_session_callbacks_set_on_frame_recv_callback(callbacks,
                                                            on_frame_recv_callback);
@@ -275,12 +275,12 @@ this pending data. To process the received data, we call the
 ``session_recv()`` function::
 
     static int session_recv(http2_session_data *session_data) {
-      ssize_t readlen;
+      nghttp2_ssize readlen;
       struct evbuffer *input = bufferevent_get_input(session_data->bev);
       size_t datalen = evbuffer_get_length(input);
       unsigned char *data = evbuffer_pullup(input, -1);
 
-      readlen = nghttp2_session_mem_recv(session_data->session, data, datalen);
+      readlen = nghttp2_session_mem_recv2(session_data->session, data, datalen);
       if (readlen < 0) {
         warnx("Fatal error: %s", nghttp2_strerror((int)readlen));
         return -1;
@@ -296,9 +296,9 @@ this pending data. To process the received data, we call the
     }
 
 In this function, we feed all unprocessed but already received data to
-the nghttp2 session object using the `nghttp2_session_mem_recv()`
-function. The `nghttp2_session_mem_recv()` function processes the data
-and may both invoke the previously setup callbacks and also queue
+the nghttp2 session object using the `nghttp2_session_mem_recv2()`
+function. The `nghttp2_session_mem_recv2()` function processes the
+data and may both invoke the previously setup callbacks and also queue
 outgoing frames. To send any pending outgoing frames, we immediately
 call ``session_send()``.
 
@@ -316,11 +316,12 @@ The ``session_send()`` function is defined as follows::
 
 The `nghttp2_session_send()` function serializes the frame into wire
 format and calls the ``send_callback()``, which is of type
-:type:`nghttp2_send_callback`.  The ``send_callback()`` is defined as
+:type:`nghttp2_send_callback2`.  The ``send_callback()`` is defined as
 follows::
 
-    static ssize_t send_callback(nghttp2_session *session _U_, const uint8_t *data,
-                                 size_t length, int flags _U_, void *user_data) {
+    static nghttp2_ssize send_callback(nghttp2_session *session _U_,
+                                       const uint8_t *data, size_t length,
+                                       int flags _U_, void *user_data) {
       http2_session_data *session_data = (http2_session_data *)user_data;
       struct bufferevent *bev = session_data->bev;
       /* Avoid excessive buffering in server side. */
@@ -329,7 +330,7 @@ follows::
         return NGHTTP2_ERR_WOULDBLOCK;
       }
       bufferevent_write(bev, data, length);
-      return (ssize_t)length;
+      return (nghttp2_ssize)length;
     }
 
 Since we use bufferevent to abstract network I/O, we just write the
@@ -509,11 +510,11 @@ Sending the file content is performed by the ``send_response()`` function::
     static int send_response(nghttp2_session *session, int32_t stream_id,
                              nghttp2_nv *nva, size_t nvlen, int fd) {
       int rv;
-      nghttp2_data_provider data_prd;
+      nghttp2_data_provider2 data_prd;
       data_prd.source.fd = fd;
       data_prd.read_callback = file_read_callback;
 
-      rv = nghttp2_submit_response(session, stream_id, nva, nvlen, &data_prd);
+      rv = nghttp2_submit_response2(session, stream_id, nva, nvlen, &data_prd);
       if (rv != 0) {
         warnx("Fatal error: %s", nghttp2_strerror(rv));
         return -1;
@@ -521,7 +522,7 @@ Sending the file content is performed by the ``send_response()`` function::
       return 0;
     }
 
-nghttp2 uses the :type:`nghttp2_data_provider` structure to send the
+nghttp2 uses the :type:`nghttp2_data_provider2` structure to send the
 entity body to the remote peer. The ``source`` member of this
 structure is a union, which can be either a void pointer or an int
 (which is intended to be used as file descriptor). In this example
@@ -529,11 +530,11 @@ server, we use it as a file descriptor. We also set the
 ``file_read_callback()`` callback function to read the contents of the
 file::
 
-    static ssize_t file_read_callback(nghttp2_session *session _U_,
-                                      int32_t stream_id _U_, uint8_t *buf,
-                                      size_t length, uint32_t *data_flags,
-                                      nghttp2_data_source *source,
-                                      void *user_data _U_) {
+    static nghttp2_ssize file_read_callback(nghttp2_session *session _U_,
+                                            int32_t stream_id _U_, uint8_t *buf,
+                                            size_t length, uint32_t *data_flags,
+                                            nghttp2_data_source *source,
+                                            void *user_data _U_) {
       int fd = source->fd;
       ssize_t r;
       while ((r = read(fd, buf, length)) == -1 && errno == EINTR)
@@ -544,7 +545,7 @@ file::
       if (r == 0) {
         *data_flags |= NGHTTP2_DATA_FLAG_EOF;
       }
-      return r;
+      return (nghttp2_ssize)r;
     }
 
 If an error occurs while reading the file, we return
@@ -553,8 +554,8 @@ library to send RST_STREAM to the stream.  When all data has been
 read, the :macro:`NGHTTP2_DATA_FLAG_EOF` flag is set to signal nghttp2
 that we have finished reading the file.
 
-The `nghttp2_submit_response()` function is used to send the response to the
-remote peer.
+The `nghttp2_submit_response2()` function is used to send the response
+to the remote peer.
 
 The ``on_stream_close_callback()`` function is invoked when the stream
 is about to close::