diff options
Diffstat (limited to 'src/core/transport/chttp2/frame_ping.c')
-rw-r--r-- | src/core/transport/chttp2/frame_ping.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/src/core/transport/chttp2/frame_ping.c b/src/core/transport/chttp2/frame_ping.c new file mode 100644 index 0000000000..9556c0cae8 --- /dev/null +++ b/src/core/transport/chttp2/frame_ping.c @@ -0,0 +1,93 @@ +/* + * + * Copyright 2014, 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 <string.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_parse_state *state, 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; + + 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) { + state->process_ping_reply = 1; + } else { + state->send_ping_ack = 1; + } + } + + return GRPC_CHTTP2_PARSE_OK; +} |