| /* |
| * |
| * Copyright 2015 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #include "src/core/ext/transport/chttp2/transport/frame_rst_stream.h" |
| #include "src/core/ext/transport/chttp2/transport/internal.h" |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/string_util.h> |
| |
| #include "src/core/ext/transport/chttp2/transport/frame.h" |
| #include "src/core/lib/transport/http2_errors.h" |
| |
| grpc_slice grpc_chttp2_rst_stream_create(uint32_t id, uint32_t code, |
| grpc_transport_one_way_stats* stats) { |
| static const size_t frame_size = 13; |
| grpc_slice slice = GRPC_SLICE_MALLOC(frame_size); |
| stats->framing_bytes += frame_size; |
| uint8_t* p = GRPC_SLICE_START_PTR(slice); |
| |
| // Frame size. |
| *p++ = 0; |
| *p++ = 0; |
| *p++ = 4; |
| // Frame type. |
| *p++ = GRPC_CHTTP2_FRAME_RST_STREAM; |
| // Flags. |
| *p++ = 0; |
| // Stream ID. |
| *p++ = static_cast<uint8_t>(id >> 24); |
| *p++ = static_cast<uint8_t>(id >> 16); |
| *p++ = static_cast<uint8_t>(id >> 8); |
| *p++ = static_cast<uint8_t>(id); |
| // Error code. |
| *p++ = static_cast<uint8_t>(code >> 24); |
| *p++ = static_cast<uint8_t>(code >> 16); |
| *p++ = static_cast<uint8_t>(code >> 8); |
| *p++ = static_cast<uint8_t>(code); |
| |
| return slice; |
| } |
| |
| grpc_error* grpc_chttp2_rst_stream_parser_begin_frame( |
| grpc_chttp2_rst_stream_parser* parser, uint32_t length, uint8_t flags) { |
| if (length != 4) { |
| char* msg; |
| gpr_asprintf(&msg, "invalid rst_stream: length=%d, flags=%02x", length, |
| flags); |
| grpc_error* err = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg); |
| gpr_free(msg); |
| return err; |
| } |
| parser->byte = 0; |
| return GRPC_ERROR_NONE; |
| } |
| |
| grpc_error* grpc_chttp2_rst_stream_parser_parse(void* parser, |
| grpc_chttp2_transport* t, |
| grpc_chttp2_stream* s, |
| grpc_slice slice, int is_last) { |
| uint8_t* const beg = GRPC_SLICE_START_PTR(slice); |
| uint8_t* const end = GRPC_SLICE_END_PTR(slice); |
| uint8_t* cur = beg; |
| grpc_chttp2_rst_stream_parser* p = |
| static_cast<grpc_chttp2_rst_stream_parser*>(parser); |
| |
| while (p->byte != 4 && cur != end) { |
| p->reason_bytes[p->byte] = *cur; |
| cur++; |
| p->byte++; |
| } |
| s->stats.incoming.framing_bytes += static_cast<uint64_t>(end - cur); |
| |
| if (p->byte == 4) { |
| GPR_ASSERT(is_last); |
| uint32_t reason = ((static_cast<uint32_t>(p->reason_bytes[0])) << 24) | |
| ((static_cast<uint32_t>(p->reason_bytes[1])) << 16) | |
| ((static_cast<uint32_t>(p->reason_bytes[2])) << 8) | |
| ((static_cast<uint32_t>(p->reason_bytes[3]))); |
| grpc_error* error = GRPC_ERROR_NONE; |
| if (reason != GRPC_HTTP2_NO_ERROR || s->metadata_buffer[1].size == 0) { |
| char* message; |
| gpr_asprintf(&message, "Received RST_STREAM with error code %d", reason); |
| error = grpc_error_set_int( |
| grpc_error_set_str(GRPC_ERROR_CREATE_FROM_STATIC_STRING("RST_STREAM"), |
| GRPC_ERROR_STR_GRPC_MESSAGE, |
| grpc_slice_from_copied_string(message)), |
| GRPC_ERROR_INT_HTTP2_ERROR, static_cast<intptr_t>(reason)); |
| gpr_free(message); |
| } |
| grpc_chttp2_mark_stream_closed(t, s, true, true, error); |
| } |
| |
| return GRPC_ERROR_NONE; |
| } |