Commit | Line | Data |
---|---|---|
6364a07a DG |
1 | /* |
2 | * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
6364a07a DG |
19 | #include <assert.h> |
20 | #include <limits.h> | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include <sys/stat.h> | |
25 | #include <sys/types.h> | |
26 | #include <unistd.h> | |
27 | #include <errno.h> | |
a655f4cf | 28 | #include <fcntl.h> |
389fbf04 | 29 | #include <common/compat/time.h> |
a655f4cf | 30 | #include <poll.h> |
6364a07a | 31 | |
90e535ef | 32 | #include <common/common.h> |
395d6b02 | 33 | #include <common/time.h> |
6364a07a DG |
34 | |
35 | #include "inet6.h" | |
36 | ||
a655f4cf MD |
37 | #define RECONNECT_DELAY 200 /* ms */ |
38 | ||
6364a07a DG |
39 | /* |
40 | * INET protocol operations. | |
41 | */ | |
42 | static const struct lttcomm_proto_ops inet6_ops = { | |
43 | .bind = lttcomm_bind_inet6_sock, | |
44 | .close = lttcomm_close_inet6_sock, | |
45 | .connect = lttcomm_connect_inet6_sock, | |
46 | .accept = lttcomm_accept_inet6_sock, | |
47 | .listen = lttcomm_listen_inet6_sock, | |
48 | .recvmsg = lttcomm_recvmsg_inet6_sock, | |
49 | .sendmsg = lttcomm_sendmsg_inet6_sock, | |
50 | }; | |
51 | ||
52 | /* | |
53 | * Creates an PF_INET socket. | |
54 | */ | |
90e535ef | 55 | LTTNG_HIDDEN |
6364a07a DG |
56 | int lttcomm_create_inet6_sock(struct lttcomm_sock *sock, int type, int proto) |
57 | { | |
de5e9086 | 58 | int val = 1, ret; |
783a3b9a | 59 | unsigned long timeout; |
6364a07a DG |
60 | |
61 | /* Create server socket */ | |
7b43086d | 62 | if ((sock->fd = socket(PF_INET6, type, proto)) < 0) { |
6364a07a DG |
63 | PERROR("socket inet6"); |
64 | goto error; | |
65 | } | |
66 | ||
67 | sock->ops = &inet6_ops; | |
68 | ||
69 | /* | |
70 | * Set socket option to reuse the address. | |
71 | */ | |
72 | ret = setsockopt(sock->fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(int)); | |
73 | if (ret < 0) { | |
74 | PERROR("setsockopt inet6"); | |
75 | goto error; | |
76 | } | |
783a3b9a MD |
77 | timeout = lttcomm_get_network_timeout(); |
78 | if (timeout) { | |
79 | ret = lttcomm_setsockopt_rcv_timeout(sock->fd, timeout); | |
80 | if (ret) { | |
81 | goto error; | |
82 | } | |
83 | ret = lttcomm_setsockopt_snd_timeout(sock->fd, timeout); | |
84 | if (ret) { | |
85 | goto error; | |
86 | } | |
87 | } | |
6364a07a DG |
88 | |
89 | return 0; | |
90 | ||
91 | error: | |
92 | return -1; | |
93 | } | |
94 | ||
95 | /* | |
96 | * Bind socket and return. | |
97 | */ | |
90e535ef | 98 | LTTNG_HIDDEN |
6364a07a DG |
99 | int lttcomm_bind_inet6_sock(struct lttcomm_sock *sock) |
100 | { | |
2288467f | 101 | return bind(sock->fd, |
1a65bbb8 JG |
102 | (const struct sockaddr *) ALIGNED_CONST_PTR( |
103 | sock->sockaddr.addr.sin6), | |
6364a07a | 104 | sizeof(sock->sockaddr.addr.sin6)); |
6364a07a DG |
105 | } |
106 | ||
a655f4cf MD |
107 | static |
108 | int connect_no_timeout(struct lttcomm_sock *sock) | |
109 | { | |
1a65bbb8 JG |
110 | return connect(sock->fd, |
111 | (const struct sockaddr *) ALIGNED_CONST_PTR( | |
112 | sock->sockaddr.addr.sin6), | |
a655f4cf MD |
113 | sizeof(sock->sockaddr.addr.sin6)); |
114 | } | |
115 | ||
a655f4cf MD |
116 | static |
117 | int connect_with_timeout(struct lttcomm_sock *sock) | |
118 | { | |
119 | unsigned long timeout = lttcomm_get_network_timeout(); | |
120 | int ret, flags, connect_ret; | |
121 | struct timespec orig_time, cur_time; | |
2daf6502 | 122 | unsigned long diff_ms; |
a655f4cf MD |
123 | |
124 | ret = fcntl(sock->fd, F_GETFL, 0); | |
125 | if (ret == -1) { | |
126 | PERROR("fcntl"); | |
127 | return -1; | |
128 | } | |
129 | flags = ret; | |
130 | ||
131 | /* Set socket to nonblock */ | |
132 | ret = fcntl(sock->fd, F_SETFL, flags | O_NONBLOCK); | |
133 | if (ret == -1) { | |
134 | PERROR("fcntl"); | |
135 | return -1; | |
136 | } | |
137 | ||
389fbf04 | 138 | ret = lttng_clock_gettime(CLOCK_MONOTONIC, &orig_time); |
a655f4cf MD |
139 | if (ret == -1) { |
140 | PERROR("clock_gettime"); | |
141 | return -1; | |
142 | } | |
143 | ||
144 | connect_ret = connect(sock->fd, | |
1a65bbb8 JG |
145 | (const struct sockaddr *) ALIGNED_CONST_PTR( |
146 | sock->sockaddr.addr.sin6), | |
147 | sizeof(sock->sockaddr.addr.sin6)); | |
148 | if (connect_ret == -1 && errno != EAGAIN && errno != EWOULDBLOCK && | |
149 | errno != EINPROGRESS) { | |
a655f4cf MD |
150 | goto error; |
151 | } else if (!connect_ret) { | |
152 | /* Connect succeeded */ | |
153 | goto success; | |
154 | } | |
155 | ||
48ac9596 JR |
156 | DBG("Asynchronous connect for sock %d, performing polling with" |
157 | " timeout: %lums", sock->fd, timeout); | |
158 | ||
a655f4cf MD |
159 | /* |
160 | * Perform poll loop following EINPROGRESS recommendation from | |
161 | * connect(2) man page. | |
162 | */ | |
163 | do { | |
164 | struct pollfd fds; | |
165 | ||
166 | fds.fd = sock->fd; | |
167 | fds.events = POLLOUT; | |
168 | fds.revents = 0; | |
169 | ret = poll(&fds, 1, RECONNECT_DELAY); | |
170 | if (ret < 0) { | |
171 | goto error; | |
172 | } else if (ret > 0) { | |
173 | int optval; | |
174 | socklen_t optval_len = sizeof(optval); | |
175 | ||
176 | if (!(fds.revents & POLLOUT)) { | |
177 | /* Either hup or error */ | |
178 | errno = EPIPE; | |
179 | goto error; | |
180 | } | |
181 | /* got something */ | |
182 | ret = getsockopt(sock->fd, SOL_SOCKET, | |
183 | SO_ERROR, &optval, &optval_len); | |
184 | if (ret) { | |
48ac9596 | 185 | PERROR("getsockopt"); |
a655f4cf MD |
186 | goto error; |
187 | } | |
188 | if (!optval) { | |
189 | connect_ret = 0; | |
190 | goto success; | |
191 | } else { | |
48ac9596 JR |
192 | /* Get actual connect() errno from opt_val */ |
193 | errno = optval; | |
a655f4cf MD |
194 | goto error; |
195 | } | |
196 | } | |
197 | /* ret == 0: timeout */ | |
389fbf04 | 198 | ret = lttng_clock_gettime(CLOCK_MONOTONIC, &cur_time); |
a655f4cf MD |
199 | if (ret == -1) { |
200 | PERROR("clock_gettime"); | |
201 | connect_ret = ret; | |
202 | goto error; | |
203 | } | |
2daf6502 MD |
204 | if (timespec_to_ms(timespec_abs_diff(cur_time, orig_time), &diff_ms) < 0) { |
205 | ERR("timespec_to_ms input overflows milliseconds output"); | |
206 | connect_ret = -1; | |
207 | goto error; | |
208 | } | |
209 | } while (diff_ms < timeout); | |
a655f4cf MD |
210 | |
211 | /* Timeout */ | |
212 | errno = ETIMEDOUT; | |
213 | connect_ret = -1; | |
214 | ||
215 | success: | |
216 | /* Restore initial flags */ | |
217 | ret = fcntl(sock->fd, F_SETFL, flags); | |
218 | if (ret == -1) { | |
219 | PERROR("fcntl"); | |
220 | /* Continue anyway */ | |
221 | } | |
222 | error: | |
223 | return connect_ret; | |
224 | } | |
225 | ||
6364a07a DG |
226 | /* |
227 | * Connect PF_INET socket. | |
228 | */ | |
90e535ef | 229 | LTTNG_HIDDEN |
6364a07a DG |
230 | int lttcomm_connect_inet6_sock(struct lttcomm_sock *sock) |
231 | { | |
232 | int ret, closeret; | |
233 | ||
a655f4cf MD |
234 | if (lttcomm_get_network_timeout()) { |
235 | ret = connect_with_timeout(sock); | |
236 | } else { | |
237 | ret = connect_no_timeout(sock); | |
238 | } | |
6364a07a | 239 | if (ret < 0) { |
82c05d47 | 240 | PERROR("connect inet6"); |
6364a07a DG |
241 | goto error_connect; |
242 | } | |
243 | ||
244 | return ret; | |
245 | ||
246 | error_connect: | |
247 | closeret = close(sock->fd); | |
248 | if (closeret) { | |
249 | PERROR("close inet6"); | |
250 | } | |
251 | ||
252 | return ret; | |
253 | } | |
254 | ||
255 | /* | |
256 | * Do an accept(2) on the sock and return the new lttcomm socket. The socket | |
257 | * MUST be bind(2) before. | |
258 | */ | |
90e535ef | 259 | LTTNG_HIDDEN |
6364a07a DG |
260 | struct lttcomm_sock *lttcomm_accept_inet6_sock(struct lttcomm_sock *sock) |
261 | { | |
262 | int new_fd; | |
88a5db70 | 263 | socklen_t len; |
6364a07a | 264 | struct lttcomm_sock *new_sock; |
1a65bbb8 | 265 | struct sockaddr_in6 new_addr = {}; |
6364a07a DG |
266 | |
267 | if (sock->proto == LTTCOMM_SOCK_UDP) { | |
268 | /* | |
269 | * accept(2) does not exist for UDP so simply return the passed socket. | |
270 | */ | |
271 | new_sock = sock; | |
272 | goto end; | |
273 | } | |
274 | ||
de5e9086 | 275 | new_sock = lttcomm_alloc_sock(sock->proto); |
6364a07a DG |
276 | if (new_sock == NULL) { |
277 | goto error; | |
278 | } | |
279 | ||
1a65bbb8 | 280 | len = sizeof(new_addr); |
88a5db70 | 281 | |
6364a07a | 282 | /* Blocking call */ |
1a65bbb8 | 283 | new_fd = accept(sock->fd, (struct sockaddr *) &new_addr, &len); |
6364a07a DG |
284 | if (new_fd < 0) { |
285 | PERROR("accept inet6"); | |
286 | goto error; | |
287 | } | |
1a65bbb8 | 288 | new_sock->sockaddr.addr.sin6 = new_addr; |
6364a07a | 289 | new_sock->fd = new_fd; |
de5e9086 | 290 | new_sock->ops = &inet6_ops; |
6364a07a DG |
291 | |
292 | end: | |
293 | return new_sock; | |
294 | ||
295 | error: | |
296 | free(new_sock); | |
297 | return NULL; | |
298 | } | |
299 | ||
300 | /* | |
301 | * Make the socket listen using LTTNG_SESSIOND_COMM_MAX_LISTEN. | |
302 | */ | |
90e535ef | 303 | LTTNG_HIDDEN |
6364a07a DG |
304 | int lttcomm_listen_inet6_sock(struct lttcomm_sock *sock, int backlog) |
305 | { | |
306 | int ret; | |
307 | ||
308 | if (sock->proto == LTTCOMM_SOCK_UDP) { | |
309 | /* listen(2) does not exist for UDP so simply return success. */ | |
310 | ret = 0; | |
311 | goto end; | |
312 | } | |
313 | ||
314 | /* Default listen backlog */ | |
315 | if (backlog <= 0) { | |
316 | backlog = LTTNG_SESSIOND_COMM_MAX_LISTEN; | |
317 | } | |
318 | ||
319 | ret = listen(sock->fd, backlog); | |
320 | if (ret < 0) { | |
321 | PERROR("listen inet6"); | |
322 | } | |
323 | ||
324 | end: | |
325 | return ret; | |
326 | } | |
327 | ||
328 | /* | |
329 | * Receive data of size len in put that data into the buf param. Using recvmsg | |
330 | * API. | |
331 | * | |
332 | * Return the size of received data. | |
333 | */ | |
90e535ef | 334 | LTTNG_HIDDEN |
6364a07a DG |
335 | ssize_t lttcomm_recvmsg_inet6_sock(struct lttcomm_sock *sock, void *buf, |
336 | size_t len, int flags) | |
337 | { | |
338 | struct msghdr msg; | |
339 | struct iovec iov[1]; | |
340 | ssize_t ret = -1; | |
7c5aef62 | 341 | size_t len_last; |
1a65bbb8 | 342 | struct sockaddr_in6 addr = sock->sockaddr.addr.sin6; |
6364a07a DG |
343 | |
344 | memset(&msg, 0, sizeof(msg)); | |
345 | ||
346 | iov[0].iov_base = buf; | |
347 | iov[0].iov_len = len; | |
348 | msg.msg_iov = iov; | |
349 | msg.msg_iovlen = 1; | |
350 | ||
1a65bbb8 | 351 | msg.msg_name = (struct sockaddr *) &addr; |
6364a07a DG |
352 | msg.msg_namelen = sizeof(sock->sockaddr.addr.sin6); |
353 | ||
6364a07a | 354 | do { |
7c5aef62 | 355 | len_last = iov[0].iov_len; |
6364a07a | 356 | ret = recvmsg(sock->fd, &msg, flags); |
7c5aef62 | 357 | if (ret > 0) { |
5312a3ed JG |
358 | if (flags & MSG_DONTWAIT) { |
359 | goto end; | |
360 | } | |
7c5aef62 DG |
361 | iov[0].iov_base += ret; |
362 | iov[0].iov_len -= ret; | |
363 | assert(ret <= len_last); | |
364 | } | |
365 | } while ((ret > 0 && ret < len_last) || (ret < 0 && errno == EINTR)); | |
6364a07a | 366 | if (ret < 0) { |
7c5aef62 DG |
367 | PERROR("recvmsg inet"); |
368 | } else if (ret > 0) { | |
369 | ret = len; | |
6364a07a | 370 | } |
7c5aef62 | 371 | /* Else ret = 0 meaning an orderly shutdown. */ |
5312a3ed | 372 | end: |
6364a07a DG |
373 | return ret; |
374 | } | |
375 | ||
376 | /* | |
377 | * Send buf data of size len. Using sendmsg API. | |
378 | * | |
379 | * Return the size of sent data. | |
380 | */ | |
90e535ef | 381 | LTTNG_HIDDEN |
c2d69327 | 382 | ssize_t lttcomm_sendmsg_inet6_sock(struct lttcomm_sock *sock, const void *buf, |
6364a07a DG |
383 | size_t len, int flags) |
384 | { | |
385 | struct msghdr msg; | |
386 | struct iovec iov[1]; | |
387 | ssize_t ret = -1; | |
388 | ||
389 | memset(&msg, 0, sizeof(msg)); | |
390 | ||
c2d69327 | 391 | iov[0].iov_base = (void *) buf; |
6364a07a DG |
392 | iov[0].iov_len = len; |
393 | msg.msg_iov = iov; | |
394 | msg.msg_iovlen = 1; | |
395 | ||
396 | switch (sock->proto) { | |
397 | case LTTCOMM_SOCK_UDP: | |
1a65bbb8 JG |
398 | { |
399 | struct sockaddr_in6 addr = sock->sockaddr.addr.sin6; | |
400 | ||
401 | msg.msg_name = (struct sockaddr *) &addr; | |
6364a07a DG |
402 | msg.msg_namelen = sizeof(sock->sockaddr.addr.sin6); |
403 | break; | |
1a65bbb8 | 404 | } |
6364a07a DG |
405 | default: |
406 | break; | |
407 | } | |
408 | ||
409 | do { | |
410 | ret = sendmsg(sock->fd, &msg, flags); | |
411 | } while (ret < 0 && errno == EINTR); | |
412 | if (ret < 0) { | |
413 | /* | |
414 | * Only warn about EPIPE when quiet mode is deactivated. | |
415 | * We consider EPIPE as expected. | |
416 | */ | |
417 | if (errno != EPIPE || !lttng_opt_quiet) { | |
418 | PERROR("sendmsg inet6"); | |
419 | } | |
420 | } | |
421 | ||
422 | return ret; | |
423 | } | |
424 | ||
425 | /* | |
426 | * Shutdown cleanly and close. | |
427 | */ | |
90e535ef | 428 | LTTNG_HIDDEN |
6364a07a DG |
429 | int lttcomm_close_inet6_sock(struct lttcomm_sock *sock) |
430 | { | |
6e742359 | 431 | int ret; |
6364a07a | 432 | |
de5e9086 | 433 | /* Don't try to close an invalid marked socket */ |
6364a07a DG |
434 | if (sock->fd == -1) { |
435 | return 0; | |
436 | } | |
437 | ||
6e742359 DG |
438 | ret = close(sock->fd); |
439 | if (ret) { | |
6364a07a DG |
440 | PERROR("close inet6"); |
441 | } | |
442 | ||
443 | /* Mark socket */ | |
444 | sock->fd = -1; | |
445 | ||
446 | return ret; | |
447 | } |