Line data    Source code

       1             : /*
       2             :  *
       3             :  * Copyright 2015, Google Inc.
       4             :  * All rights reserved.
       5             :  *
       6             :  * Redistribution and use in source and binary forms, with or without
       7             :  * modification, are permitted provided that the following conditions are
       8             :  * met:
       9             :  *
      10             :  *     * Redistributions of source code must retain the above copyright
      11             :  * notice, this list of conditions and the following disclaimer.
      12             :  *     * Redistributions in binary form must reproduce the above
      13             :  * copyright notice, this list of conditions and the following disclaimer
      14             :  * in the documentation and/or other materials provided with the
      15             :  * distribution.
      16             :  *     * Neither the name of Google Inc. nor the names of its
      17             :  * contributors may be used to endorse or promote products derived from
      18             :  * this software without specific prior written permission.
      19             :  *
      20             :  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      21             :  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      22             :  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      23             :  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
      24             :  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      25             :  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
      26             :  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      27             :  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      28             :  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      29             :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      30             :  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      31             :  *
      32             :  */
      33             : 
      34             : #include "src/core/transport/chttp2/frame_rst_stream.h"
      35             : #include "src/core/transport/chttp2/internal.h"
      36             : 
      37             : #include <grpc/support/log.h>
      38             : 
      39             : #include "src/core/transport/chttp2/frame.h"
      40             : 
      41      278996 : gpr_slice grpc_chttp2_rst_stream_create(gpr_uint32 id, gpr_uint32 code) {
      42      278996 :   gpr_slice slice = gpr_slice_malloc(13);
      43      279001 :   gpr_uint8 *p = GPR_SLICE_START_PTR(slice);
      44             : 
      45      279001 :   *p++ = 0;
      46      279001 :   *p++ = 0;
      47      279001 :   *p++ = 4;
      48      279001 :   *p++ = GRPC_CHTTP2_FRAME_RST_STREAM;
      49      279001 :   *p++ = 0;
      50      279001 :   *p++ = (gpr_uint8)(id >> 24);
      51      279001 :   *p++ = (gpr_uint8)(id >> 16);
      52      279001 :   *p++ = (gpr_uint8)(id >> 8);
      53      279001 :   *p++ = (gpr_uint8)(id);
      54      279001 :   *p++ = (gpr_uint8)(code >> 24);
      55      279001 :   *p++ = (gpr_uint8)(code >> 16);
      56      279001 :   *p++ = (gpr_uint8)(code >> 8);
      57      279001 :   *p++ = (gpr_uint8)(code);
      58             : 
      59      279001 :   return slice;
      60             : }
      61             : 
      62      278025 : grpc_chttp2_parse_error grpc_chttp2_rst_stream_parser_begin_frame(
      63             :     grpc_chttp2_rst_stream_parser *parser, gpr_uint32 length, gpr_uint8 flags) {
      64      278025 :   if (length != 4) {
      65           0 :     gpr_log(GPR_ERROR, "invalid rst_stream: length=%d, flags=%02x", length,
      66             :             flags);
      67           0 :     return GRPC_CHTTP2_CONNECTION_ERROR;
      68             :   }
      69      278025 :   parser->byte = 0;
      70      278025 :   return GRPC_CHTTP2_PARSE_OK;
      71             : }
      72             : 
      73        5764 : grpc_chttp2_parse_error grpc_chttp2_rst_stream_parser_parse(
      74             :     grpc_exec_ctx *exec_ctx, void *parser,
      75             :     grpc_chttp2_transport_parsing *transport_parsing,
      76             :     grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last) {
      77        5764 :   gpr_uint8 *const beg = GPR_SLICE_START_PTR(slice);
      78        5764 :   gpr_uint8 *const end = GPR_SLICE_END_PTR(slice);
      79        5764 :   gpr_uint8 *cur = beg;
      80        5764 :   grpc_chttp2_rst_stream_parser *p = parser;
      81             : 
      82       34454 :   while (p->byte != 4 && cur != end) {
      83       22926 :     p->reason_bytes[p->byte] = *cur;
      84       22926 :     cur++;
      85       22926 :     p->byte++;
      86             :   }
      87             : 
      88        5764 :   if (p->byte == 4) {
      89        5731 :     GPR_ASSERT(is_last);
      90        5731 :     stream_parsing->received_close = 1;
      91        5731 :     stream_parsing->saw_rst_stream = 1;
      92        5731 :     stream_parsing->rst_stream_reason =
      93       11462 :         (((gpr_uint32)p->reason_bytes[0]) << 24) |
      94       11462 :         (((gpr_uint32)p->reason_bytes[1]) << 16) |
      95       11462 :         (((gpr_uint32)p->reason_bytes[2]) << 8) |
      96        5731 :         (((gpr_uint32)p->reason_bytes[3]));
      97             :   }
      98             : 
      99        5764 :   return GRPC_CHTTP2_PARSE_OK;
     100             : }