deps: update nghttp2 to 1.34.0

Key new feature: RFC 8441 `:protocol` support

PR-URL: #23284
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

deps/nghttp2/lib/includes/nghttp2/nghttp2.h

@@ -680,7 +680,12 @@ typedef enum {
   /**
    * SETTINGS_MAX_HEADER_LIST_SIZE
    */
-  NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE = 0x06
+  NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE = 0x06,
+  /**
+   * SETTINGS_ENABLE_CONNECT_PROTOCOL
+   * (`RFC 8441 <https://tools.ietf.org/html/rfc8441>`_)
+   */
+  NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL = 0x08
 } nghttp2_settings_id;
 /* Note: If we add SETTINGS, update the capacity of
    NGHTTP2_INBOUND_NUM_IV as well */

deps/nghttp2/lib/includes/nghttp2/nghttp2ver.h

@@ -29,14 +29,14 @@
  * @macro
  * Version number of the nghttp2 library release
  */
-#define NGHTTP2_VERSION "1.33.0"
+#define NGHTTP2_VERSION "1.34.0"
 
 /**
  * @macro
  * Numerical representation of the version number of the nghttp2 library
  * release. This is a 24 bit number with 8 bits for major number, 8 bits
  * for minor and 8 bits for patch. Version 1.2.3 becomes 0x010203.
  */
-#define NGHTTP2_VERSION_NUM 0x012100
+#define NGHTTP2_VERSION_NUM 0x012200
 
 #endif /* NGHTTP2VER_H */

deps/nghttp2/lib/nghttp2_frame.c

@@ -1050,6 +1050,11 @@ int nghttp2_iv_check(const nghttp2_settings_entry *iv, size_t niv) {
       break;
     case NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE:
       break;
+    case NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
+      if (iv[i].value != 0 && iv[i].value != 1) {
+        return 0;
+      }
+      break;
     }
   }
   return 1;

deps/nghttp2/lib/nghttp2_hd.c

@@ -45,7 +45,7 @@
 /* 3rd parameter is nghttp2_token value for header field name.  We use
    first enum value if same header names are repeated (e.g.,
    :status). */
-static nghttp2_hd_static_entry static_table[] = {
+static const nghttp2_hd_static_entry static_table[] = {
     MAKE_STATIC_ENT(":authority", "", 0, 3153725150u),
     MAKE_STATIC_ENT(":method", "GET", 1, 695666056u),
     MAKE_STATIC_ENT(":method", "POST", 1, 695666056u),
@@ -271,6 +271,15 @@ static int32_t lookup_token(const uint8_t *name, size_t namelen) {
       break;
     }
     break;
+  case 9:
+    switch (name[8]) {
+    case 'l':
+      if (memeq(":protoco", name, 8)) {
+        return NGHTTP2_TOKEN__PROTOCOL;
+      }
+      break;
+    }
+    break;
   case 10:
     switch (name[9]) {
     case 'e':
@@ -1159,7 +1168,7 @@ static search_result search_static_table(const nghttp2_nv *nv, int32_t token,
                                          int name_only) {
   search_result res = {token, 0};
   int i;
-  nghttp2_hd_static_entry *ent;
+  const nghttp2_hd_static_entry *ent;
 
   if (name_only) {
     return res;
@@ -1184,7 +1193,7 @@ static search_result search_hd_table(nghttp2_hd_context *context,
                                      int indexing_mode, nghttp2_hd_map *map,
                                      uint32_t hash) {
   search_result res = {-1, 0};
-  nghttp2_hd_entry *ent;
+  const nghttp2_hd_entry *ent;
   int exact_match;
   int name_only = indexing_mode == NGHTTP2_HD_NEVER_INDEXING;
 
@@ -1289,8 +1298,9 @@ nghttp2_hd_nv nghttp2_hd_table_get(nghttp2_hd_context *context, size_t idx) {
     return hd_ringbuf_get(&context->hd_table, idx - NGHTTP2_STATIC_TABLE_LENGTH)
         ->nv;
   } else {
-    nghttp2_hd_static_entry *ent = &static_table[idx];
-    nghttp2_hd_nv nv = {&ent->name, &ent->value, ent->token,
+    const nghttp2_hd_static_entry *ent = &static_table[idx];
+    nghttp2_hd_nv nv = {(nghttp2_rcbuf *)&ent->name,
+                        (nghttp2_rcbuf *)&ent->value, ent->token,
                         NGHTTP2_NV_FLAG_NONE};
     return nv;
   }

deps/nghttp2/lib/nghttp2_hd.h

@@ -111,6 +111,7 @@ typedef enum {
   NGHTTP2_TOKEN_KEEP_ALIVE,
   NGHTTP2_TOKEN_PROXY_CONNECTION,
   NGHTTP2_TOKEN_UPGRADE,
+  NGHTTP2_TOKEN__PROTOCOL,
 } nghttp2_token;
 
 struct nghttp2_hd_entry;

deps/nghttp2/lib/nghttp2_helper.c

@@ -340,7 +340,7 @@ const char *nghttp2_strerror(int error_code) {
 }
 
 /* Generated by gennmchartbl.py */
-static int VALID_HD_NAME_CHARS[] = {
+static const int VALID_HD_NAME_CHARS[] = {
     0 /* NUL  */, 0 /* SOH  */, 0 /* STX  */, 0 /* ETX  */,
     0 /* EOT  */, 0 /* ENQ  */, 0 /* ACK  */, 0 /* BEL  */,
     0 /* BS   */, 0 /* HT   */, 0 /* LF   */, 0 /* VT   */,
@@ -428,7 +428,7 @@ int nghttp2_check_header_name(const uint8_t *name, size_t len) {
 }
 
 /* Generated by genvchartbl.py */
-static int VALID_HD_VALUE_CHARS[] = {
+static const int VALID_HD_VALUE_CHARS[] = {
     0 /* NUL  */, 0 /* SOH  */, 0 /* STX  */, 0 /* ETX  */,
     0 /* EOT  */, 0 /* ENQ  */, 0 /* ACK  */, 0 /* BEL  */,
     0 /* BS   */, 1 /* HT   */, 0 /* LF   */, 0 /* VT   */,

deps/nghttp2/lib/nghttp2_http.c

@@ -113,7 +113,7 @@ static int check_path(nghttp2_stream *stream) {
 }
 
 static int http_request_on_header(nghttp2_stream *stream, nghttp2_hd_nv *nv,
-                                  int trailer) {
+                                  int trailer, int connect_protocol) {
   if (nv->name->base[0] == ':') {
     if (trailer ||
         (stream->http_flags & NGHTTP2_HTTP_FLAG_PSEUDO_HEADER_DISALLOWED)) {
@@ -146,10 +146,6 @@ static int http_request_on_header(nghttp2_stream *stream, nghttp2_hd_nv *nv,
             return NGHTTP2_ERR_HTTP_HEADER;
           }
           stream->http_flags |= NGHTTP2_HTTP_FLAG_METH_CONNECT;
-          if (stream->http_flags &
-              (NGHTTP2_HTTP_FLAG__PATH | NGHTTP2_HTTP_FLAG__SCHEME)) {
-            return NGHTTP2_ERR_HTTP_HEADER;
-          }
         }
         break;
       case 'S':
@@ -162,9 +158,6 @@ static int http_request_on_header(nghttp2_stream *stream, nghttp2_hd_nv *nv,
     }
     break;
   case NGHTTP2_TOKEN__PATH:
-    if (stream->http_flags & NGHTTP2_HTTP_FLAG_METH_CONNECT) {
-      return NGHTTP2_ERR_HTTP_HEADER;
-    }
     if (!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__PATH)) {
       return NGHTTP2_ERR_HTTP_HEADER;
     }
@@ -175,9 +168,6 @@ static int http_request_on_header(nghttp2_stream *stream, nghttp2_hd_nv *nv,
     }
     break;
   case NGHTTP2_TOKEN__SCHEME:
-    if (stream->http_flags & NGHTTP2_HTTP_FLAG_METH_CONNECT) {
-      return NGHTTP2_ERR_HTTP_HEADER;
-    }
     if (!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__SCHEME)) {
       return NGHTTP2_ERR_HTTP_HEADER;
     }
@@ -186,6 +176,15 @@ static int http_request_on_header(nghttp2_stream *stream, nghttp2_hd_nv *nv,
       stream->http_flags |= NGHTTP2_HTTP_FLAG_SCHEME_HTTP;
     }
     break;
+  case NGHTTP2_TOKEN__PROTOCOL:
+    if (!connect_protocol) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+
+    if (!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__PROTOCOL)) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    break;
   case NGHTTP2_TOKEN_HOST:
     if (!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG_HOST)) {
       return NGHTTP2_ERR_HTTP_HEADER;
@@ -265,7 +264,7 @@ static int http_response_on_header(nghttp2_stream *stream, nghttp2_hd_nv *nv,
       return NGHTTP2_ERR_REMOVE_HTTP_HEADER;
     }
     if (stream->status_code / 100 == 1 ||
-        (stream->status_code == 200 &&
+        (stream->status_code / 100 == 2 &&
          (stream->http_flags & NGHTTP2_HTTP_FLAG_METH_CONNECT))) {
       return NGHTTP2_ERR_HTTP_HEADER;
     }
@@ -458,16 +457,21 @@ int nghttp2_http_on_header(nghttp2_session *session, nghttp2_stream *stream,
   }
 
   if (session->server || frame->hd.type == NGHTTP2_PUSH_PROMISE) {
-    return http_request_on_header(stream, nv, trailer);
+    return http_request_on_header(stream, nv, trailer,
+                                  session->server &&
+                                      session->pending_enable_connect_protocol);
   }
 
   return http_response_on_header(stream, nv, trailer);
 }
 
 int nghttp2_http_on_request_headers(nghttp2_stream *stream,
                                     nghttp2_frame *frame) {
-  if (stream->http_flags & NGHTTP2_HTTP_FLAG_METH_CONNECT) {
-    if ((stream->http_flags & NGHTTP2_HTTP_FLAG__AUTHORITY) == 0) {
+  if (!(stream->http_flags & NGHTTP2_HTTP_FLAG__PROTOCOL) &&
+      (stream->http_flags & NGHTTP2_HTTP_FLAG_METH_CONNECT)) {
+    if ((stream->http_flags &
+         (NGHTTP2_HTTP_FLAG__SCHEME | NGHTTP2_HTTP_FLAG__PATH)) ||
+        (stream->http_flags & NGHTTP2_HTTP_FLAG__AUTHORITY) == 0) {
       return -1;
     }
     stream->content_length = -1;
@@ -478,6 +482,11 @@ int nghttp2_http_on_request_headers(nghttp2_stream *stream,
          (NGHTTP2_HTTP_FLAG__AUTHORITY | NGHTTP2_HTTP_FLAG_HOST)) == 0) {
       return -1;
     }
+    if ((stream->http_flags & NGHTTP2_HTTP_FLAG__PROTOCOL) &&
+        ((stream->http_flags & NGHTTP2_HTTP_FLAG_METH_CONNECT) == 0 ||
+         (stream->http_flags & NGHTTP2_HTTP_FLAG__AUTHORITY) == 0)) {
+      return -1;
+    }
     if (!check_path(stream)) {
       return -1;
     }

deps/nghttp2/lib/nghttp2_session.c

@@ -4361,6 +4361,9 @@ int nghttp2_session_update_local_settings(nghttp2_session *session,
     case NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE:
       session->local_settings.max_header_list_size = iv[i].value;
       break;
+    case NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
+      session->local_settings.enable_connect_protocol = iv[i].value;
+      break;
     }
   }
 
@@ -4499,6 +4502,26 @@ int nghttp2_session_on_settings_received(nghttp2_session *session,
 
       session->remote_settings.max_header_list_size = entry->value;
 
+      break;
+    case NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
+
+      if (entry->value != 0 && entry->value != 1) {
+        return session_handle_invalid_connection(
+            session, frame, NGHTTP2_ERR_PROTO,
+            "SETTINGS: invalid SETTINGS_ENABLE_CONNECT_PROTOCOL");
+      }
+
+      if (!session->server &&
+          session->remote_settings.enable_connect_protocol &&
+          entry->value == 0) {
+        return session_handle_invalid_connection(
+            session, frame, NGHTTP2_ERR_PROTO,
+            "SETTINGS: server attempted to disable "
+            "SETTINGS_ENABLE_CONNECT_PROTOCOL");
+      }
+
+      session->remote_settings.enable_connect_protocol = entry->value;
+
       break;
     }
   }
@@ -5250,6 +5273,7 @@ static void inbound_frame_set_settings_entry(nghttp2_inbound_frame *iframe) {
   case NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE:
   case NGHTTP2_SETTINGS_MAX_FRAME_SIZE:
   case NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE:
+  case NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
     break;
   default:
     DEBUGF("recv: unknown settings id=0x%02x\n", iv.settings_id);
@@ -7052,6 +7076,13 @@ int nghttp2_session_add_settings(nghttp2_session *session, uint8_t flags,
     }
   }
 
+  for (i = niv; i > 0; --i) {
+    if (iv[i - 1].settings_id == NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL) {
+      session->pending_enable_connect_protocol = (uint8_t)iv[i - 1].value;
+      break;
+    }
+  }
+
   return 0;
 }
 
@@ -7360,6 +7391,8 @@ uint32_t nghttp2_session_get_remote_settings(nghttp2_session *session,
     return session->remote_settings.max_frame_size;
   case NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE:
     return session->remote_settings.max_header_list_size;
+  case NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
+    return session->remote_settings.enable_connect_protocol;
   }
 
   assert(0);
@@ -7381,6 +7414,8 @@ uint32_t nghttp2_session_get_local_settings(nghttp2_session *session,
     return session->local_settings.max_frame_size;
   case NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE:
     return session->local_settings.max_header_list_size;
+  case NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
+    return session->local_settings.enable_connect_protocol;
   }
 
   assert(0);

deps/nghttp2/lib/nghttp2_session.h

@@ -164,6 +164,7 @@ typedef struct {
   uint32_t initial_window_size;
   uint32_t max_frame_size;
   uint32_t max_header_list_size;
+  uint32_t enable_connect_protocol;
 } nghttp2_settings_storage;
 
 typedef enum {
@@ -321,6 +322,9 @@ struct nghttp2_session {
   /* Unacked local ENABLE_PUSH value.  We use this to refuse
      PUSH_PROMISE before SETTINGS ACK is received. */
   uint8_t pending_enable_push;
+  /* Unacked local ENABLE_CONNECT_PROTOCOL value.  We use this to
+     accept :protocol header field before SETTINGS_ACK is received. */
+  uint8_t pending_enable_connect_protocol;
   /* Nonzero if the session is server side. */
   uint8_t server;
   /* Flags indicating GOAWAY is sent and/or received. The flags are

deps/nghttp2/lib/nghttp2_stream.h

@@ -130,7 +130,8 @@ typedef enum {
   /* "http" or "https" scheme */
   NGHTTP2_HTTP_FLAG_SCHEME_HTTP = 1 << 13,
   /* set if final response is expected */
-  NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE = 1 << 14
+  NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE = 1 << 14,
+  NGHTTP2_HTTP_FLAG__PROTOCOL = 1 << 15,
 } nghttp2_http_flag;
 
 struct nghttp2_stream {