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
|
#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"
#ifdef INCLUDE_GENERATED_DECLARATIONS
# include "event/socket.c.generated.h"
#endif
#define NVIM_DEFAULT_TCP_PORT 7450
void socket_watcher_init(Loop *loop, SocketWatcher *watcher,
const char *endpoint, void *data)
FUNC_ATTR_NONNULL_ARG(1) FUNC_ATTR_NONNULL_ARG(2) FUNC_ATTR_NONNULL_ARG(3)
{
// Trim to `ADDRESS_MAX_SIZE`
if (xstrlcpy(watcher->addr, endpoint, sizeof(watcher->addr))
>= sizeof(watcher->addr)) {
// TODO(aktau): since this is not what the user wanted, perhaps we
// should return an error here
WLOG("Address was too long, truncated to %s", watcher->addr);
}
bool tcp = true;
char ip[16], *ip_end = xstrchrnul(watcher->addr, ':');
// (ip_end - addr) is always > 0, so convert to size_t
size_t addr_len = (size_t)(ip_end - watcher->addr);
if (addr_len > sizeof(ip) - 1) {
// Maximum length of an IPv4 address buffer is 15 (eg: 255.255.255.255)
addr_len = sizeof(ip) - 1;
}
// Extract the address part
xstrlcpy(ip, watcher->addr, addr_len + 1);
int port = NVIM_DEFAULT_TCP_PORT;
if (*ip_end == ':') {
// Extract the port
long lport = strtol(ip_end + 1, NULL, 10); // NOLINT
if (lport <= 0 || lport > 0xffff) {
// Invalid port, treat as named pipe or unix socket
tcp = false;
} else {
port = (int) lport;
}
}
if (tcp) {
// Try to parse ip address
if (uv_ip4_addr(ip, port, &watcher->uv.tcp.addr)) {
// Invalid address, treat as named pipe or unix socket
tcp = false;
}
}
if (tcp) {
uv_tcp_init(&loop->uv, &watcher->uv.tcp.handle);
watcher->stream = (uv_stream_t *)&watcher->uv.tcp.handle;
} else {
uv_pipe_init(&loop->uv, &watcher->uv.pipe.handle, 0);
watcher->stream = (uv_stream_t *)&watcher->uv.pipe.handle;
}
watcher->stream->data = watcher;
watcher->cb = NULL;
watcher->close_cb = NULL;
watcher->events = NULL;
}
int socket_watcher_start(SocketWatcher *watcher, int backlog, socket_cb cb)
FUNC_ATTR_NONNULL_ALL
{
watcher->cb = cb;
int result;
if (watcher->stream->type == UV_TCP) {
result = uv_tcp_bind(&watcher->uv.tcp.handle,
(const struct sockaddr *)&watcher->uv.tcp.addr, 0);
} 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 == -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 = -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 = (uv_stream_t *)&stream->uv.tcp;
uv_tcp_init(watcher->uv.tcp.handle.loop, (uv_tcp_t *)client);
} else {
client = (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);
}
}
|
