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/*
*
* Copyright 2016 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 "src/core/lib/iomgr/port.h"
#ifdef GRPC_UV
#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_uv.h"
#include "src/core/lib/iomgr/sockaddr_utils.h"
#include "src/core/lib/iomgr/tcp_client.h"
#include "src/core/lib/iomgr/tcp_uv.h"
#include "src/core/lib/iomgr/timer.h"
extern grpc_tracer_flag grpc_tcp_trace;
typedef struct grpc_uv_tcp_connect {
uv_connect_t connect_req;
grpc_timer alarm;
grpc_closure on_alarm;
uv_tcp_t *tcp_handle;
grpc_closure *closure;
grpc_endpoint **endpoint;
int refs;
char *addr_name;
grpc_resource_quota *resource_quota;
} grpc_uv_tcp_connect;
static void uv_tcp_connect_cleanup(grpc_exec_ctx *exec_ctx,
grpc_uv_tcp_connect *connect) {
grpc_resource_quota_unref_internal(exec_ctx, connect->resource_quota);
gpr_free(connect->addr_name);
gpr_free(connect);
}
static void tcp_close_callback(uv_handle_t *handle) { gpr_free(handle); }
static void uv_tc_on_alarm(grpc_exec_ctx *exec_ctx, void *acp,
grpc_error *error) {
int done;
grpc_uv_tcp_connect *connect = (grpc_uv_tcp_connect *)acp;
if (GRPC_TRACER_ON(grpc_tcp_trace)) {
const char *str = grpc_error_string(error);
gpr_log(GPR_DEBUG, "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 */
uv_close((uv_handle_t *)connect->tcp_handle, tcp_close_callback);
}
done = (--connect->refs == 0);
if (done) {
uv_tcp_connect_cleanup(exec_ctx, connect);
}
}
static void uv_tc_on_connect(uv_connect_t *req, int status) {
grpc_uv_tcp_connect *connect = (grpc_uv_tcp_connect *)req->data;
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
grpc_error *error = GRPC_ERROR_NONE;
int done;
grpc_closure *closure = connect->closure;
grpc_timer_cancel(&exec_ctx, &connect->alarm);
if (status == 0) {
*connect->endpoint = grpc_tcp_create(
connect->tcp_handle, connect->resource_quota, connect->addr_name);
} else {
error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
"Failed to connect to remote host");
error = grpc_error_set_int(error, GRPC_ERROR_INT_ERRNO, -status);
error =
grpc_error_set_str(error, GRPC_ERROR_STR_OS_ERROR,
grpc_slice_from_static_string(uv_strerror(status)));
if (status == UV_ECANCELED) {
error =
grpc_error_set_str(error, GRPC_ERROR_STR_OS_ERROR,
grpc_slice_from_static_string("Timeout occurred"));
// This should only happen if the handle is already closed
} else {
error = grpc_error_set_str(
error, GRPC_ERROR_STR_OS_ERROR,
grpc_slice_from_static_string(uv_strerror(status)));
uv_close((uv_handle_t *)connect->tcp_handle, tcp_close_callback);
}
}
done = (--connect->refs == 0);
if (done) {
grpc_exec_ctx_flush(&exec_ctx);
uv_tcp_connect_cleanup(&exec_ctx, connect);
}
GRPC_CLOSURE_SCHED(&exec_ctx, closure, error);
grpc_exec_ctx_finish(&exec_ctx);
}
static void tcp_client_connect_impl(grpc_exec_ctx *exec_ctx,
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_uv_tcp_connect *connect;
grpc_resource_quota *resource_quota = grpc_resource_quota_create(NULL);
(void)channel_args;
(void)interested_parties;
GRPC_UV_ASSERT_SAME_THREAD();
if (channel_args != NULL) {
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(exec_ctx, resource_quota);
resource_quota = grpc_resource_quota_ref_internal(
(grpc_resource_quota *)channel_args->args[i].value.pointer.p);
}
}
}
connect = (grpc_uv_tcp_connect *)gpr_zalloc(sizeof(grpc_uv_tcp_connect));
connect->closure = closure;
connect->endpoint = ep;
connect->tcp_handle = (uv_tcp_t *)gpr_malloc(sizeof(uv_tcp_t));
connect->addr_name = grpc_sockaddr_to_uri(resolved_addr);
connect->resource_quota = resource_quota;
uv_tcp_init(uv_default_loop(), connect->tcp_handle);
connect->connect_req.data = connect;
connect->refs = 2; // One for the connect operation, one for the timer.
if (GRPC_TRACER_ON(grpc_tcp_trace)) {
gpr_log(GPR_DEBUG, "CLIENT_CONNECT: %s: asynchronously connecting",
connect->addr_name);
}
// TODO(murgatroid99): figure out what the return value here means
uv_tcp_connect(&connect->connect_req, connect->tcp_handle,
(const struct sockaddr *)resolved_addr->addr,
uv_tc_on_connect);
GRPC_CLOSURE_INIT(&connect->on_alarm, uv_tc_on_alarm, connect,
grpc_schedule_on_exec_ctx);
grpc_timer_init(exec_ctx, &connect->alarm, deadline, &connect->on_alarm);
}
// overridden by api_fuzzer.c
extern "C" {
void (*grpc_tcp_client_connect_impl)(
grpc_exec_ctx *exec_ctx, grpc_closure *closure, grpc_endpoint **ep,
grpc_pollset_set *interested_parties, const grpc_channel_args *channel_args,
const grpc_resolved_address *addr,
grpc_millis deadline) = tcp_client_connect_impl;
}
void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
grpc_endpoint **ep,
grpc_pollset_set *interested_parties,
const grpc_channel_args *channel_args,
const grpc_resolved_address *addr,
grpc_millis deadline) {
grpc_tcp_client_connect_impl(exec_ctx, closure, ep, interested_parties,
channel_args, addr, deadline);
}
#endif /* GRPC_UV */
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