1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/*
*
* 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 = 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 = 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,
gpr_timespec 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(
channel_args->args[i].value.pointer.p);
}
}
}
connect = gpr_zalloc(sizeof(grpc_uv_tcp_connect));
connect->closure = closure;
connect->endpoint = ep;
connect->tcp_handle = 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 = 1;
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,
gpr_convert_clock_type(deadline, GPR_CLOCK_MONOTONIC),
&connect->on_alarm, gpr_now(GPR_CLOCK_MONOTONIC));
}
// overridden by api_fuzzer.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,
gpr_timespec 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,
gpr_timespec deadline) {
grpc_tcp_client_connect_impl(exec_ctx, closure, ep, interested_parties,
channel_args, addr, deadline);
}
#endif /* GRPC_UV */
|
