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/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <grpc/support/port_platform.h>
#include "src/core/lib/iomgr/port.h"
#include <string.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include "src/core/lib/iomgr/error.h"
#include "src/core/lib/iomgr/iomgr_custom.h"
#include "src/core/lib/iomgr/sockaddr_utils.h"
#include "src/core/lib/iomgr/tcp_client.h"
#include "src/core/lib/iomgr/tcp_custom.h"
#include "src/core/lib/iomgr/timer.h"
extern grpc_core::TraceFlag grpc_tcp_trace;
extern grpc_socket_vtable* grpc_custom_socket_vtable;
struct grpc_custom_tcp_connect {
grpc_custom_socket* socket;
grpc_timer alarm;
grpc_closure on_alarm;
grpc_closure* closure;
grpc_endpoint** endpoint;
int refs;
char* addr_name;
grpc_resource_quota* resource_quota;
};
static void custom_tcp_connect_cleanup(grpc_custom_tcp_connect* connect) {
grpc_custom_socket* socket = connect->socket;
grpc_resource_quota_unref_internal(connect->resource_quota);
gpr_free(connect->addr_name);
gpr_free(connect);
socket->refs--;
if (socket->refs == 0) {
grpc_custom_socket_vtable->destroy(socket);
gpr_free(socket);
}
}
static void custom_close_callback(grpc_custom_socket* socket) {}
static void on_alarm(void* acp, grpc_error* error) {
int done;
grpc_custom_socket* socket = (grpc_custom_socket*)acp;
grpc_custom_tcp_connect* connect = socket->connector;
if (grpc_tcp_trace.enabled()) {
const char* str = grpc_error_string(error);
gpr_log(GPR_INFO, "CLIENT_CONNECT: %s: on_alarm: error=%s",
connect->addr_name, str);
}
if (error == GRPC_ERROR_NONE) {
/* error == NONE implies that the timer ran out, and wasn't cancelled. If
it was cancelled, then the handler that cancelled it also should close
the handle, if applicable */
grpc_custom_socket_vtable->close(socket, custom_close_callback);
}
done = (--connect->refs == 0);
if (done) {
custom_tcp_connect_cleanup(connect);
}
}
static void custom_connect_callback_internal(grpc_custom_socket* socket,
grpc_error* error) {
grpc_custom_tcp_connect* connect = socket->connector;
int done;
grpc_closure* closure = connect->closure;
grpc_timer_cancel(&connect->alarm);
if (error == GRPC_ERROR_NONE) {
*connect->endpoint = custom_tcp_endpoint_create(
socket, connect->resource_quota, connect->addr_name);
}
done = (--connect->refs == 0);
if (done) {
grpc_core::ExecCtx::Get()->Flush();
custom_tcp_connect_cleanup(connect);
}
GRPC_CLOSURE_SCHED(closure, error);
}
static void custom_connect_callback(grpc_custom_socket* socket,
grpc_error* error) {
if (grpc_core::ExecCtx::Get() == nullptr) {
/* If we are being run on a thread which does not have an exec_ctx created
* yet, we should create one. */
grpc_core::ExecCtx exec_ctx;
custom_connect_callback_internal(socket, error);
} else {
custom_connect_callback_internal(socket, error);
}
}
static void tcp_connect(grpc_closure* closure, grpc_endpoint** ep,
grpc_pollset_set* interested_parties,
const grpc_channel_args* channel_args,
const grpc_resolved_address* resolved_addr,
grpc_millis deadline) {
GRPC_CUSTOM_IOMGR_ASSERT_SAME_THREAD();
(void)channel_args;
(void)interested_parties;
grpc_custom_tcp_connect* connect;
grpc_resource_quota* resource_quota = grpc_resource_quota_create(nullptr);
if (channel_args != nullptr) {
for (size_t i = 0; i < channel_args->num_args; i++) {
if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
grpc_resource_quota_unref_internal(resource_quota);
resource_quota = grpc_resource_quota_ref_internal(
(grpc_resource_quota*)channel_args->args[i].value.pointer.p);
}
}
}
grpc_custom_socket* socket =
(grpc_custom_socket*)gpr_malloc(sizeof(grpc_custom_socket));
socket->refs = 2;
grpc_custom_socket_vtable->init(socket, GRPC_AF_UNSPEC);
connect =
(grpc_custom_tcp_connect*)gpr_malloc(sizeof(grpc_custom_tcp_connect));
connect->closure = closure;
connect->endpoint = ep;
connect->addr_name = grpc_sockaddr_to_uri(resolved_addr);
connect->resource_quota = resource_quota;
connect->socket = socket;
socket->connector = connect;
socket->endpoint = nullptr;
socket->listener = nullptr;
connect->refs = 2;
if (grpc_tcp_trace.enabled()) {
gpr_log(GPR_INFO, "CLIENT_CONNECT: %p %s: asynchronously connecting",
socket, connect->addr_name);
}
GRPC_CLOSURE_INIT(&connect->on_alarm, on_alarm, socket,
grpc_schedule_on_exec_ctx);
grpc_timer_init(&connect->alarm, deadline, &connect->on_alarm);
grpc_custom_socket_vtable->connect(
socket, (const grpc_sockaddr*)resolved_addr->addr, resolved_addr->len,
custom_connect_callback);
}
grpc_tcp_client_vtable custom_tcp_client_vtable = {tcp_connect};
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