| /* |
| * |
| * 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_ping.h" |
| #include "src/core/transport/chttp2/internal.h" |
| |
| #include <string.h> |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| |
| gpr_slice grpc_chttp2_ping_create(gpr_uint8 ack, gpr_uint8 *opaque_8bytes) { |
| gpr_slice slice = gpr_slice_malloc(9 + 8); |
| gpr_uint8 *p = GPR_SLICE_START_PTR(slice); |
| |
| *p++ = 0; |
| *p++ = 0; |
| *p++ = 8; |
| *p++ = GRPC_CHTTP2_FRAME_PING; |
| *p++ = ack ? 1 : 0; |
| *p++ = 0; |
| *p++ = 0; |
| *p++ = 0; |
| *p++ = 0; |
| memcpy(p, opaque_8bytes, 8); |
| |
| return slice; |
| } |
| |
| grpc_chttp2_parse_error grpc_chttp2_ping_parser_begin_frame( |
| grpc_chttp2_ping_parser *parser, gpr_uint32 length, gpr_uint8 flags) { |
| if (flags & 0xfe || length != 8) { |
| gpr_log(GPR_ERROR, "invalid ping: length=%d, flags=%02x", length, flags); |
| return GRPC_CHTTP2_CONNECTION_ERROR; |
| } |
| parser->byte = 0; |
| parser->is_ack = flags; |
| return GRPC_CHTTP2_PARSE_OK; |
| } |
| |
| grpc_chttp2_parse_error grpc_chttp2_ping_parser_parse( |
| void *parser, grpc_chttp2_transport_parsing *transport_parsing, |
| grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last) { |
| gpr_uint8 *const beg = GPR_SLICE_START_PTR(slice); |
| gpr_uint8 *const end = GPR_SLICE_END_PTR(slice); |
| gpr_uint8 *cur = beg; |
| grpc_chttp2_ping_parser *p = parser; |
| grpc_chttp2_outstanding_ping *ping; |
| |
| while (p->byte != 8 && cur != end) { |
| p->opaque_8bytes[p->byte] = *cur; |
| cur++; |
| p->byte++; |
| } |
| |
| if (p->byte == 8) { |
| GPR_ASSERT(is_last); |
| if (p->is_ack) { |
| for (ping = transport_parsing->pings.next; |
| ping != &transport_parsing->pings; ping = ping->next) { |
| if (0 == memcmp(p->opaque_8bytes, ping->id, 8)) { |
| grpc_iomgr_add_delayed_callback(ping->on_recv, 1); |
| } |
| ping->next->prev = ping->prev; |
| ping->prev->next = ping->next; |
| gpr_free(ping); |
| } |
| } else { |
| gpr_slice_buffer_add(&transport_parsing->qbuf, |
| grpc_chttp2_ping_create(1, p->opaque_8bytes)); |
| } |
| } |
| |
| return GRPC_CHTTP2_PARSE_OK; |
| } |