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/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#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/ext/transport/chttp2/transport/http2_errors.h"
#include "src/core/ext/transport/chttp2/transport/status_conversion.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++ = (uint8_t)(id >> 24);
*p++ = (uint8_t)(id >> 16);
*p++ = (uint8_t)(id >> 8);
*p++ = (uint8_t)(id);
// Error code.
*p++ = (uint8_t)(code >> 24);
*p++ = (uint8_t)(code >> 16);
*p++ = (uint8_t)(code >> 8);
*p++ = (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(msg);
gpr_free(msg);
return err;
}
parser->byte = 0;
return GRPC_ERROR_NONE;
}
grpc_error *grpc_chttp2_rst_stream_parser_parse(grpc_exec_ctx *exec_ctx,
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 = parser;
while (p->byte != 4 && cur != end) {
p->reason_bytes[p->byte] = *cur;
cur++;
p->byte++;
}
s->stats.incoming.framing_bytes += (uint64_t)(end - cur);
if (p->byte == 4) {
GPR_ASSERT(is_last);
uint32_t reason = (((uint32_t)p->reason_bytes[0]) << 24) |
(((uint32_t)p->reason_bytes[1]) << 16) |
(((uint32_t)p->reason_bytes[2]) << 8) |
(((uint32_t)p->reason_bytes[3]));
grpc_error *error = GRPC_ERROR_NONE;
if (reason != GRPC_CHTTP2_NO_ERROR || s->header_frames_received < 2) {
error = grpc_error_set_int(GRPC_ERROR_CREATE("RST_STREAM"),
GRPC_ERROR_INT_HTTP2_ERROR, (intptr_t)reason);
grpc_status_code status_code = grpc_chttp2_http2_error_to_grpc_status(
(grpc_chttp2_error_code)reason, s->deadline);
char *status_details;
gpr_asprintf(&status_details, "Received RST_STREAM with error code %d",
reason);
grpc_slice slice_details = grpc_slice_from_copied_string(status_details);
gpr_free(status_details);
grpc_chttp2_fake_status(exec_ctx, t, s, status_code, &slice_details);
}
grpc_chttp2_mark_stream_closed(exec_ctx, t, s, true, true, error);
}
return GRPC_ERROR_NONE;
}
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