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/*
*
* 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/surface/lame_client.h"
#include <string.h>
#include "src/core/channel/channel_stack.h"
#include "src/core/support/string.h"
#include "src/core/surface/channel.h"
#include "src/core/surface/call.h"
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
typedef struct {
void *unused;
} call_data;
typedef struct {
grpc_mdelem *message;
} channel_data;
static void do_nothing(void *data, grpc_op_error error) {}
static void call_op(grpc_call_element *elem, grpc_call_element *from_elem,
grpc_call_op *op) {
channel_data *channeld = elem->channel_data;
GRPC_CALL_LOG_OP(GPR_INFO, elem, op);
switch (op->type) {
case GRPC_SEND_START: {
grpc_call_op set_status_op;
grpc_mdelem_ref(channeld->message);
memset(&set_status_op, 0, sizeof(grpc_call_op));
set_status_op.dir = GRPC_CALL_UP;
set_status_op.type = GRPC_RECV_METADATA;
set_status_op.done_cb = do_nothing;
set_status_op.data.metadata = channeld->message;
grpc_call_recv_metadata(elem, &set_status_op);
grpc_call_recv_finish(elem, 1);
break;
}
case GRPC_SEND_METADATA:
grpc_mdelem_unref(op->data.metadata);
break;
default:
break;
}
op->done_cb(op->user_data, GRPC_OP_ERROR);
}
static void channel_op(grpc_channel_element *elem,
grpc_channel_element *from_elem, grpc_channel_op *op) {
switch (op->type) {
case GRPC_CHANNEL_GOAWAY:
gpr_slice_unref(op->data.goaway.message);
break;
default:
break;
}
}
static void init_call_elem(grpc_call_element *elem,
const void *transport_server_data) {}
static void destroy_call_elem(grpc_call_element *elem) {}
static void init_channel_elem(grpc_channel_element *elem,
const grpc_channel_args *args, grpc_mdctx *mdctx,
int is_first, int is_last) {
channel_data *channeld = elem->channel_data;
GPR_ASSERT(is_first);
GPR_ASSERT(is_last);
channeld->message = grpc_mdelem_from_strings(mdctx, "grpc-message",
"Rpc sent on a lame channel.");
}
static void destroy_channel_elem(grpc_channel_element *elem) {
channel_data *channeld = elem->channel_data;
grpc_mdelem_unref(channeld->message);
}
static const grpc_channel_filter lame_filter = {
call_op, channel_op, sizeof(call_data),
init_call_elem, destroy_call_elem, sizeof(channel_data),
init_channel_elem, destroy_channel_elem, "lame-client", };
grpc_channel *grpc_lame_client_channel_create(void) {
static const grpc_channel_filter *filters[] = {&lame_filter};
return grpc_channel_create_from_filters(filters, 1, NULL, grpc_mdctx_create(),
1);
}
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