static grpc_error *init_frame_parser(grpc_exec_ctx *exec_ctx,
grpc_chttp2_transport *t) {
if (t->is_first_frame &&
t->incoming_frame_type != GRPC_CHTTP2_FRAME_SETTINGS) {
char *msg;
gpr_asprintf(
&msg, "Expected SETTINGS frame as the first frame, got frame type %d",
t->incoming_frame_type);
grpc_error *err = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
gpr_free(msg);
return err;
}
t->is_first_frame = false;
if (t->expect_continuation_stream_id != 0) {
if (t->incoming_frame_type != GRPC_CHTTP2_FRAME_CONTINUATION) {
char *msg;
gpr_asprintf(&msg, "Expected CONTINUATION frame, got frame type %02x",
t->incoming_frame_type);
grpc_error *err = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
gpr_free(msg);
return err;
}
if (t->expect_continuation_stream_id != t->incoming_stream_id) {
char *msg;
gpr_asprintf(
&msg,
"Expected CONTINUATION frame for grpc_chttp2_stream %08x, got "
"grpc_chttp2_stream %08x",
t->expect_continuation_stream_id, t->incoming_stream_id);
grpc_error *err = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
gpr_free(msg);
return err;
}
return init_header_frame_parser(exec_ctx, t, 1);
}
switch (t->incoming_frame_type) {
case GRPC_CHTTP2_FRAME_DATA:
return init_data_frame_parser(exec_ctx, t);
case GRPC_CHTTP2_FRAME_HEADER:
return init_header_frame_parser(exec_ctx, t, 0);
case GRPC_CHTTP2_FRAME_CONTINUATION:
return GRPC_ERROR_CREATE_FROM_STATIC_STRING(
"Unexpected CONTINUATION frame");
case GRPC_CHTTP2_FRAME_RST_STREAM:
return init_rst_stream_parser(exec_ctx, t);
case GRPC_CHTTP2_FRAME_SETTINGS:
return init_settings_frame_parser(exec_ctx, t);
case GRPC_CHTTP2_FRAME_WINDOW_UPDATE:
return init_window_update_frame_parser(exec_ctx, t);
case GRPC_CHTTP2_FRAME_PING:
return init_ping_parser(exec_ctx, t);
case GRPC_CHTTP2_FRAME_GOAWAY:
return init_goaway_parser(exec_ctx, t);
default:
if (GRPC_TRACER_ON(grpc_http_trace)) {
gpr_log(GPR_ERROR, "Unknown frame type %02x", t->incoming_frame_type);
}
return init_skip_frame_parser(exec_ctx, t, 0);
}
}
static int init_frame_parser(grpc_exec_ctx *exec_ctx,
grpc_chttp2_transport_parsing *transport_parsing) {
if (transport_parsing->expect_continuation_stream_id != 0) {
if (transport_parsing->incoming_frame_type !=
GRPC_CHTTP2_FRAME_CONTINUATION) {
gpr_log(GPR_ERROR, "Expected CONTINUATION frame, got frame type %02x",
transport_parsing->incoming_frame_type);
return 0;
}
if (transport_parsing->expect_continuation_stream_id !=
transport_parsing->incoming_stream_id) {
gpr_log(GPR_ERROR,
"Expected CONTINUATION frame for grpc_chttp2_stream %08x, got "
"grpc_chttp2_stream %08x",
transport_parsing->expect_continuation_stream_id,
transport_parsing->incoming_stream_id);
return 0;
}
return init_header_frame_parser(exec_ctx, transport_parsing, 1);
}
switch (transport_parsing->incoming_frame_type) {
case GRPC_CHTTP2_FRAME_DATA:
return init_data_frame_parser(exec_ctx, transport_parsing);
case GRPC_CHTTP2_FRAME_HEADER:
return init_header_frame_parser(exec_ctx, transport_parsing, 0);
case GRPC_CHTTP2_FRAME_CONTINUATION:
gpr_log(GPR_ERROR, "Unexpected CONTINUATION frame");
return 0;
case GRPC_CHTTP2_FRAME_RST_STREAM:
return init_rst_stream_parser(exec_ctx, transport_parsing);
case GRPC_CHTTP2_FRAME_SETTINGS:
return init_settings_frame_parser(exec_ctx, transport_parsing);
case GRPC_CHTTP2_FRAME_WINDOW_UPDATE:
return init_window_update_frame_parser(exec_ctx, transport_parsing);
case GRPC_CHTTP2_FRAME_PING:
return init_ping_parser(exec_ctx, transport_parsing);
case GRPC_CHTTP2_FRAME_GOAWAY:
return init_goaway_parser(exec_ctx, transport_parsing);
default:
gpr_log(GPR_ERROR, "Unknown frame type %02x",
transport_parsing->incoming_frame_type);
return init_skip_frame_parser(exec_ctx, transport_parsing, 0);
}
}