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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
|
/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "uv.h"
#include "internal.h"
#include <assert.h>
#include <errno.h>
#include <string.h>
#include <sys/un.h>
#include <unistd.h>
#include <stdlib.h>
int uv_pipe_init(uv_loop_t* loop, uv_pipe_t* handle, int ipc) {
uv__stream_init(loop, (uv_stream_t*)handle, UV_NAMED_PIPE);
handle->shutdown_req = NULL;
handle->connect_req = NULL;
handle->pipe_fname = NULL;
handle->ipc = ipc;
return 0;
}
int uv_pipe_bind(uv_pipe_t* handle, const char* name) {
struct sockaddr_un saddr;
const char* pipe_fname = NULL;
int sockfd = -1;
int err;
/* Already bound? */
if (uv__stream_fd(handle) >= 0)
return -EINVAL;
/* Make a copy of the file name, it outlives this function's scope. */
pipe_fname = uv__strdup(name);
if (pipe_fname == NULL)
return -ENOMEM;
/* We've got a copy, don't touch the original any more. */
name = NULL;
err = uv__socket(AF_UNIX, SOCK_STREAM, 0);
if (err < 0)
goto err_socket;
sockfd = err;
memset(&saddr, 0, sizeof saddr);
strncpy(saddr.sun_path, pipe_fname, sizeof(saddr.sun_path) - 1);
saddr.sun_path[sizeof(saddr.sun_path) - 1] = '\0';
saddr.sun_family = AF_UNIX;
if (bind(sockfd, (struct sockaddr*)&saddr, sizeof saddr)) {
err = -errno;
/* Convert ENOENT to EACCES for compatibility with Windows. */
if (err == -ENOENT)
err = -EACCES;
goto err_bind;
}
/* Success. */
handle->flags |= UV_HANDLE_BOUND;
handle->pipe_fname = pipe_fname; /* Is a strdup'ed copy. */
handle->io_watcher.fd = sockfd;
return 0;
err_bind:
uv__close(sockfd);
err_socket:
uv__free((void*)pipe_fname);
return err;
}
int uv_pipe_listen(uv_pipe_t* handle, int backlog, uv_connection_cb cb) {
if (uv__stream_fd(handle) == -1)
return -EINVAL;
#if defined(__MVS__)
/* On zOS, backlog=0 has undefined behaviour */
if (backlog == 0)
backlog = 1;
else if (backlog < 0)
backlog = SOMAXCONN;
#endif
if (listen(uv__stream_fd(handle), backlog))
return -errno;
handle->connection_cb = cb;
handle->io_watcher.cb = uv__server_io;
uv__io_start(handle->loop, &handle->io_watcher, POLLIN);
return 0;
}
void uv__pipe_close(uv_pipe_t* handle) {
if (handle->pipe_fname) {
/*
* Unlink the file system entity before closing the file descriptor.
* Doing it the other way around introduces a race where our process
* unlinks a socket with the same name that's just been created by
* another thread or process.
*/
unlink(handle->pipe_fname);
uv__free((void*)handle->pipe_fname);
handle->pipe_fname = NULL;
}
uv__stream_close((uv_stream_t*)handle);
}
int uv_pipe_open(uv_pipe_t* handle, uv_file fd) {
int err;
err = uv__nonblock(fd, 1);
if (err)
return err;
#if defined(__APPLE__)
err = uv__stream_try_select((uv_stream_t*) handle, &fd);
if (err)
return err;
#endif /* defined(__APPLE__) */
return uv__stream_open((uv_stream_t*)handle,
fd,
UV_STREAM_READABLE | UV_STREAM_WRITABLE);
}
void uv_pipe_connect(uv_connect_t* req,
uv_pipe_t* handle,
const char* name,
uv_connect_cb cb) {
struct sockaddr_un saddr;
int new_sock;
int err;
int r;
new_sock = (uv__stream_fd(handle) == -1);
if (new_sock) {
err = uv__socket(AF_UNIX, SOCK_STREAM, 0);
if (err < 0)
goto out;
handle->io_watcher.fd = err;
}
memset(&saddr, 0, sizeof saddr);
strncpy(saddr.sun_path, name, sizeof(saddr.sun_path) - 1);
saddr.sun_path[sizeof(saddr.sun_path) - 1] = '\0';
saddr.sun_family = AF_UNIX;
do {
r = connect(uv__stream_fd(handle),
(struct sockaddr*)&saddr, sizeof saddr);
}
while (r == -1 && errno == EINTR);
if (r == -1 && errno != EINPROGRESS) {
err = -errno;
goto out;
}
err = 0;
if (new_sock) {
err = uv__stream_open((uv_stream_t*)handle,
uv__stream_fd(handle),
UV_STREAM_READABLE | UV_STREAM_WRITABLE);
}
if (err == 0)
uv__io_start(handle->loop, &handle->io_watcher, POLLIN | POLLOUT);
out:
handle->delayed_error = err;
handle->connect_req = req;
uv__req_init(handle->loop, req, UV_CONNECT);
req->handle = (uv_stream_t*)handle;
req->cb = cb;
QUEUE_INIT(&req->queue);
/* Force callback to run on next tick in case of error. */
if (err)
uv__io_feed(handle->loop, &handle->io_watcher);
}
typedef int (*uv__peersockfunc)(int, struct sockaddr*, socklen_t*);
static int uv__pipe_getsockpeername(const uv_pipe_t* handle,
uv__peersockfunc func,
char* buffer,
size_t* size) {
struct sockaddr_un sa;
socklen_t addrlen;
int err;
addrlen = sizeof(sa);
memset(&sa, 0, addrlen);
err = func(uv__stream_fd(handle), (struct sockaddr*) &sa, &addrlen);
if (err < 0) {
*size = 0;
return -errno;
}
#if defined(__linux__)
if (sa.sun_path[0] == 0)
/* Linux abstract namespace */
addrlen -= offsetof(struct sockaddr_un, sun_path);
else
#endif
addrlen = strlen(sa.sun_path);
if (addrlen >= *size) {
*size = addrlen + 1;
return UV_ENOBUFS;
}
memcpy(buffer, sa.sun_path, addrlen);
*size = addrlen;
/* only null-terminate if it's not an abstract socket */
if (buffer[0] != '\0')
buffer[addrlen] = '\0';
return 0;
}
int uv_pipe_getsockname(const uv_pipe_t* handle, char* buffer, size_t* size) {
return uv__pipe_getsockpeername(handle, getsockname, buffer, size);
}
int uv_pipe_getpeername(const uv_pipe_t* handle, char* buffer, size_t* size) {
return uv__pipe_getsockpeername(handle, getpeername, buffer, size);
}
void uv_pipe_pending_instances(uv_pipe_t* handle, int count) {
}
int uv_pipe_pending_count(uv_pipe_t* handle) {
uv__stream_queued_fds_t* queued_fds;
if (!handle->ipc)
return 0;
if (handle->accepted_fd == -1)
return 0;
if (handle->queued_fds == NULL)
return 1;
queued_fds = handle->queued_fds;
return queued_fds->offset + 1;
}
uv_handle_type uv_pipe_pending_type(uv_pipe_t* handle) {
if (!handle->ipc)
return UV_UNKNOWN_HANDLE;
if (handle->accepted_fd == -1)
return UV_UNKNOWN_HANDLE;
else
return uv__handle_type(handle->accepted_fd);
}
|