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
|
// This is an open source non-commercial project. Dear PVS-Studio, please check
// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
#include <assert.h>
#include <stdint.h>
#include <uv.h>
#include "nvim/event/loop.h"
#include "nvim/event/socket.h"
#include "nvim/event/rstream.h"
#include "nvim/event/wstream.h"
#include "nvim/os/os.h"
#include "nvim/ascii.h"
#include "nvim/vim.h"
#include "nvim/strings.h"
#include "nvim/path.h"
#include "nvim/memory.h"
#include "nvim/macros.h"
#include "nvim/charset.h"
#ifdef INCLUDE_GENERATED_DECLARATIONS
# include "event/socket.c.generated.h"
#endif
void socket_watcher_init(Loop *loop, SocketWatcher *watcher,
const char *endpoint)
FUNC_ATTR_NONNULL_ALL
{
xstrlcpy(watcher->addr, endpoint, sizeof(watcher->addr));
char *addr = watcher->addr;
char *host_end = strrchr(addr, ':');
if (host_end && addr != host_end) {
intmax_t port;
int ret = getdigits_safe(&(char_u *){ (char_u *)host_end + 1 }, &port);
if (ret == FAIL || port < 0 || port > UINT16_MAX) {
// Invalid port.
goto do_pipe;
}
*host_end = '\0';
uv_getaddrinfo_t request;
int retval = uv_getaddrinfo(&loop->uv, &request, NULL, addr, host_end+1,
&(struct addrinfo){
.ai_family = AF_UNSPEC,
.ai_socktype = SOCK_STREAM,
});
*host_end = ':';
if (retval != 0) {
// Failed to look up address.
goto do_pipe;
}
*(host_end + 1) = '\0';
watcher->uv.tcp.addrinfo = request.addrinfo;
uv_tcp_init(&loop->uv, &watcher->uv.tcp.handle);
watcher->stream = STRUCT_CAST(uv_stream_t, &watcher->uv.tcp.handle);
} else {
do_pipe:
uv_pipe_init(&loop->uv, &watcher->uv.pipe.handle, 0);
watcher->stream = STRUCT_CAST(uv_stream_t, &watcher->uv.pipe.handle);
}
watcher->stream->data = watcher;
watcher->cb = NULL;
watcher->close_cb = NULL;
watcher->events = NULL;
watcher->data = NULL;
}
int socket_watcher_start(SocketWatcher *watcher, int backlog, socket_cb cb)
FUNC_ATTR_NONNULL_ALL
{
watcher->cb = cb;
int result = UV_EINVAL;
if (watcher->stream->type == UV_TCP) {
struct addrinfo *ai = watcher->uv.tcp.addrinfo;
for (; ai; ai = ai->ai_next) {
result = uv_tcp_bind(&watcher->uv.tcp.handle, ai->ai_addr, 0);
if (result != 0) {
continue;
}
result = uv_listen(watcher->stream, backlog, connection_cb);
if (result == 0) {
struct sockaddr_storage sas;
// When the endpoint in socket_watcher_init() didn't specify a port
// number, a free random port number will be assigned. sin_port will
// contain 0 in this case, unless uv_tcp_getsockname() is used first.
uv_tcp_getsockname(&watcher->uv.tcp.handle, (struct sockaddr *)&sas,
&(int){ sizeof(sas) });
uint16_t port = (sas.ss_family == AF_INET)
? ((struct sockaddr_in *)&sas)->sin_port
: ((struct sockaddr_in6 *)&sas)->sin6_port;
// v:servername uses the string from watcher->addr
size_t len = strlen(watcher->addr);
snprintf(watcher->addr+len, sizeof(watcher->addr)-len, "%" PRIu16,
ntohs(port));
break;
}
}
uv_freeaddrinfo(watcher->uv.tcp.addrinfo);
} else {
result = uv_pipe_bind(&watcher->uv.pipe.handle, watcher->addr);
if (result == 0) {
result = uv_listen(watcher->stream, backlog, connection_cb);
}
}
assert(result <= 0); // libuv should return negative error code or zero.
if (result < 0) {
if (result == UV_EACCES) {
// Libuv converts ENOENT to EACCES for Windows compatibility, but if
// the parent directory does not exist, ENOENT would be more accurate.
*path_tail((char_u *)watcher->addr) = NUL;
if (!os_path_exists((char_u *)watcher->addr)) {
result = UV_ENOENT;
}
}
return result;
}
return 0;
}
int socket_watcher_accept(SocketWatcher *watcher, Stream *stream)
FUNC_ATTR_NONNULL_ARG(1) FUNC_ATTR_NONNULL_ARG(2)
{
uv_stream_t *client;
if (watcher->stream->type == UV_TCP) {
client = STRUCT_CAST(uv_stream_t, &stream->uv.tcp);
uv_tcp_init(watcher->uv.tcp.handle.loop, (uv_tcp_t *)client);
} else {
client = STRUCT_CAST(uv_stream_t, &stream->uv.pipe);
uv_pipe_init(watcher->uv.pipe.handle.loop, (uv_pipe_t *)client, 0);
}
int result = uv_accept(watcher->stream, client);
if (result) {
uv_close((uv_handle_t *)client, NULL);
return result;
}
stream_init(NULL, stream, -1, client);
return 0;
}
void socket_watcher_close(SocketWatcher *watcher, socket_close_cb cb)
FUNC_ATTR_NONNULL_ARG(1)
{
watcher->close_cb = cb;
uv_close((uv_handle_t *)watcher->stream, close_cb);
}
static void connection_event(void **argv)
{
SocketWatcher *watcher = argv[0];
int status = (int)(uintptr_t)(argv[1]);
watcher->cb(watcher, status, watcher->data);
}
static void connection_cb(uv_stream_t *handle, int status)
{
SocketWatcher *watcher = handle->data;
CREATE_EVENT(watcher->events, connection_event, 2, watcher,
(void *)(uintptr_t)status);
}
static void close_cb(uv_handle_t *handle)
{
SocketWatcher *watcher = handle->data;
if (watcher->close_cb) {
watcher->close_cb(watcher, watcher->data);
}
}
|
