diff options
author | Craig Tiller <ctiller@google.com> | 2016-03-25 17:07:29 -0700 |
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committer | Craig Tiller <ctiller@google.com> | 2016-03-25 17:07:29 -0700 |
commit | f23078cbd302d32649537eedda1769c5685228d8 (patch) | |
tree | b0bb46845658e5b8256868d102076226aa10215e /src/core/lib/transport/chttp2/frame_window_update.c | |
parent | f3d76384351039266e250aacf97c90d5b0c07dca (diff) |
Stage #1 of core breakup: move everything under lib
Diffstat (limited to 'src/core/lib/transport/chttp2/frame_window_update.c')
-rw-r--r-- | src/core/lib/transport/chttp2/frame_window_update.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/src/core/lib/transport/chttp2/frame_window_update.c b/src/core/lib/transport/chttp2/frame_window_update.c new file mode 100644 index 0000000000..62d9bac117 --- /dev/null +++ b/src/core/lib/transport/chttp2/frame_window_update.c @@ -0,0 +1,113 @@ +/* + * + * 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/transport/chttp2/frame_window_update.h" +#include "src/core/transport/chttp2/internal.h" + +#include <grpc/support/log.h> + +gpr_slice grpc_chttp2_window_update_create(uint32_t id, + uint32_t window_update) { + gpr_slice slice = gpr_slice_malloc(13); + uint8_t *p = GPR_SLICE_START_PTR(slice); + + GPR_ASSERT(window_update); + + *p++ = 0; + *p++ = 0; + *p++ = 4; + *p++ = GRPC_CHTTP2_FRAME_WINDOW_UPDATE; + *p++ = 0; + *p++ = (uint8_t)(id >> 24); + *p++ = (uint8_t)(id >> 16); + *p++ = (uint8_t)(id >> 8); + *p++ = (uint8_t)(id); + *p++ = (uint8_t)(window_update >> 24); + *p++ = (uint8_t)(window_update >> 16); + *p++ = (uint8_t)(window_update >> 8); + *p++ = (uint8_t)(window_update); + + return slice; +} + +grpc_chttp2_parse_error grpc_chttp2_window_update_parser_begin_frame( + grpc_chttp2_window_update_parser *parser, uint32_t length, uint8_t flags) { + if (flags || length != 4) { + gpr_log(GPR_ERROR, "invalid window update: length=%d, flags=%02x", length, + flags); + return GRPC_CHTTP2_CONNECTION_ERROR; + } + parser->byte = 0; + parser->amount = 0; + return GRPC_CHTTP2_PARSE_OK; +} + +grpc_chttp2_parse_error grpc_chttp2_window_update_parser_parse( + grpc_exec_ctx *exec_ctx, void *parser, + grpc_chttp2_transport_parsing *transport_parsing, + grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last) { + uint8_t *const beg = GPR_SLICE_START_PTR(slice); + uint8_t *const end = GPR_SLICE_END_PTR(slice); + uint8_t *cur = beg; + grpc_chttp2_window_update_parser *p = parser; + + while (p->byte != 4 && cur != end) { + p->amount |= ((uint32_t)*cur) << (8 * (3 - p->byte)); + cur++; + p->byte++; + } + + if (p->byte == 4) { + uint32_t received_update = p->amount; + if (received_update == 0 || (received_update & 0x80000000u)) { + gpr_log(GPR_ERROR, "invalid window update bytes: %d", p->amount); + return GRPC_CHTTP2_CONNECTION_ERROR; + } + GPR_ASSERT(is_last); + + if (transport_parsing->incoming_stream_id != 0) { + if (stream_parsing != NULL) { + GRPC_CHTTP2_FLOW_CREDIT_STREAM("parse", transport_parsing, + stream_parsing, outgoing_window, + received_update); + grpc_chttp2_list_add_parsing_seen_stream(transport_parsing, + stream_parsing); + } + } else { + GRPC_CHTTP2_FLOW_CREDIT_TRANSPORT("parse", transport_parsing, + outgoing_window, received_update); + } + } + + return GRPC_CHTTP2_PARSE_OK; +} |