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/*
*
* 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 <grpc/grpc.h>
#include <string.h>
#include <grpc/support/alloc.h>
#include <grpc/support/string_util.h>
#include "src/core/ext/client_channel/client_channel.h"
#include "src/core/ext/transport/chttp2/client/chttp2_connector.h"
#include "src/core/lib/channel/channel_args.h"
#include "src/core/lib/surface/api_trace.h"
#include "src/core/lib/surface/channel.h"
static void client_channel_factory_ref(
grpc_client_channel_factory *cc_factory) {}
static void client_channel_factory_unref(
grpc_exec_ctx *exec_ctx, grpc_client_channel_factory *cc_factory) {}
static grpc_subchannel *client_channel_factory_create_subchannel(
grpc_exec_ctx *exec_ctx, grpc_client_channel_factory *cc_factory,
const grpc_subchannel_args *args) {
grpc_connector *connector = grpc_chttp2_connector_create(
exec_ctx, NULL /* add_handshakers */, NULL /* user_data */);
grpc_subchannel *s = grpc_subchannel_create(exec_ctx, connector, args);
grpc_connector_unref(exec_ctx, connector);
return s;
}
static grpc_channel *client_channel_factory_create_channel(
grpc_exec_ctx *exec_ctx, grpc_client_channel_factory *cc_factory,
const char *target, grpc_client_channel_type type,
const grpc_channel_args *args) {
// Add channel arg containing the server URI.
grpc_arg arg;
arg.type = GRPC_ARG_STRING;
arg.key = GRPC_ARG_SERVER_URI;
arg.value.string = (char *)target;
grpc_channel_args *new_args = grpc_channel_args_copy_and_add(args, &arg, 1);
grpc_channel *channel = grpc_channel_create(exec_ctx, target, new_args,
GRPC_CLIENT_CHANNEL, NULL);
grpc_channel_args_destroy(new_args);
return channel;
}
static const grpc_client_channel_factory_vtable client_channel_factory_vtable =
{client_channel_factory_ref, client_channel_factory_unref,
client_channel_factory_create_subchannel,
client_channel_factory_create_channel};
static grpc_client_channel_factory client_channel_factory = {
&client_channel_factory_vtable};
/* Create a client channel:
Asynchronously: - resolve target
- connect to it (trying alternatives as presented)
- perform handshakes */
grpc_channel *grpc_insecure_channel_create(const char *target,
const grpc_channel_args *args,
void *reserved) {
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
GRPC_API_TRACE(
"grpc_insecure_channel_create(target=%p, args=%p, reserved=%p)", 3,
(target, args, reserved));
GPR_ASSERT(reserved == NULL);
grpc_client_channel_factory *factory =
(grpc_client_channel_factory *)&client_channel_factory;
// Add channel arg containing the client channel factory.
grpc_arg arg = grpc_client_channel_factory_create_channel_arg(factory);
grpc_channel_args *new_args = grpc_channel_args_copy_and_add(args, &arg, 1);
// Create channel.
grpc_channel *channel = client_channel_factory_create_channel(
&exec_ctx, factory, target, GRPC_CLIENT_CHANNEL_TYPE_REGULAR, new_args);
// Clean up.
grpc_channel_args_destroy(new_args);
grpc_client_channel_factory_unref(&exec_ctx, factory);
grpc_exec_ctx_finish(&exec_ctx);
return channel != NULL ? channel : grpc_lame_client_channel_create(
target, GRPC_STATUS_INTERNAL,
"Failed to create client channel");
}
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