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Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001/*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
Markus Armbruster922a01a2018-02-01 12:18:46 +010024
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +030025#include "qemu/osdep.h"
Marc-André Lureau8228e352017-01-26 17:19:46 +040026#include "chardev/char.h"
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +030027#include "io/channel-socket.h"
Julia Suvorova981b06e2018-10-19 01:35:00 +030028#include "io/channel-websock.h"
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +030029#include "qemu/error-report.h"
Markus Armbruster0b8fa322019-05-23 16:35:07 +020030#include "qemu/module.h"
Markus Armbruster922a01a2018-02-01 12:18:46 +010031#include "qemu/option.h"
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +030032#include "qapi/error.h"
33#include "qapi/clone-visitor.h"
Markus Armbruster9af23982018-02-11 10:36:01 +010034#include "qapi/qapi-visit-sockets.h"
Lukas Straub8ee44802020-12-28 16:08:48 +010035#include "qemu/yank.h"
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +030036
Marc-André Lureau8228e352017-01-26 17:19:46 +040037#include "chardev/char-io.h"
Marc-André Lureaufa670c82021-07-26 00:03:01 +040038#include "chardev/char-socket.h"
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +030039
40static gboolean socket_reconnect_timeout(gpointer opaque);
Peter Xuce1230c2018-03-06 13:33:15 +080041static void tcp_chr_telnet_init(Chardev *chr);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +030042
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +000043static void tcp_chr_change_state(SocketChardev *s, TCPChardevState state)
44{
45 switch (state) {
46 case TCP_CHARDEV_STATE_DISCONNECTED:
47 break;
48 case TCP_CHARDEV_STATE_CONNECTING:
49 assert(s->state == TCP_CHARDEV_STATE_DISCONNECTED);
50 break;
51 case TCP_CHARDEV_STATE_CONNECTED:
52 assert(s->state == TCP_CHARDEV_STATE_CONNECTING);
53 break;
54 }
55 s->state = state;
56}
57
Peter Xu2c716ba2018-01-04 22:18:35 +080058static void tcp_chr_reconn_timer_cancel(SocketChardev *s)
59{
60 if (s->reconnect_timer) {
61 g_source_destroy(s->reconnect_timer);
62 g_source_unref(s->reconnect_timer);
63 s->reconnect_timer = NULL;
64 }
65}
66
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +030067static void qemu_chr_socket_restart_timer(Chardev *chr)
68{
69 SocketChardev *s = SOCKET_CHARDEV(chr);
70 char *name;
71
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +000072 assert(s->state == TCP_CHARDEV_STATE_DISCONNECTED);
Daniel P. Berrangé4b473732019-02-11 18:24:40 +000073 assert(!s->reconnect_timer);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +030074 name = g_strdup_printf("chardev-socket-reconnect-%s", chr->label);
Peter Xu2c716ba2018-01-04 22:18:35 +080075 s->reconnect_timer = qemu_chr_timeout_add_ms(chr,
76 s->reconnect_time * 1000,
77 socket_reconnect_timeout,
78 chr);
79 g_source_set_name(s->reconnect_timer, name);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +030080 g_free(name);
81}
82
83static void check_report_connect_error(Chardev *chr,
84 Error *err)
85{
86 SocketChardev *s = SOCKET_CHARDEV(chr);
87
88 if (!s->connect_err_reported) {
Markus Armbruster5217f182020-05-05 12:19:03 +020089 error_reportf_err(err,
90 "Unable to connect character device %s: ",
91 chr->label);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +030092 s->connect_err_reported = true;
lichuned4e0d22020-06-22 05:30:17 +080093 } else {
94 error_free(err);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +030095 }
96 qemu_chr_socket_restart_timer(chr);
97}
98
Daniel P. Berrange194b7f02017-12-18 13:54:17 +000099static void tcp_chr_accept(QIONetListener *listener,
100 QIOChannelSocket *cioc,
101 void *opaque);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300102
Anton Nefedovb0a335e2017-02-02 17:26:29 +0300103static int tcp_chr_read_poll(void *opaque);
Alberto Garcia78d01592019-08-12 18:58:29 +0300104static void tcp_chr_disconnect_locked(Chardev *chr);
Anton Nefedovb0a335e2017-02-02 17:26:29 +0300105
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300106/* Called with chr_write_lock held. */
107static int tcp_chr_write(Chardev *chr, const uint8_t *buf, int len)
108{
109 SocketChardev *s = SOCKET_CHARDEV(chr);
110
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +0000111 if (s->state == TCP_CHARDEV_STATE_CONNECTED) {
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300112 int ret = io_channel_send_full(s->ioc, buf, len,
113 s->write_msgfds,
114 s->write_msgfds_num);
115
xinhua.Cao81e34932018-07-04 11:36:42 +0800116 /* free the written msgfds in any cases
117 * other than ret < 0 && errno == EAGAIN
118 */
119 if (!(ret < 0 && EAGAIN == errno)
120 && s->write_msgfds_num) {
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300121 g_free(s->write_msgfds);
122 s->write_msgfds = 0;
123 s->write_msgfds_num = 0;
124 }
125
Anton Nefedovb0a335e2017-02-02 17:26:29 +0300126 if (ret < 0 && errno != EAGAIN) {
127 if (tcp_chr_read_poll(chr) <= 0) {
Dima Stepanov27109442020-05-28 12:11:18 +0300128 /* Perform disconnect and return error. */
Alberto Garcia78d01592019-08-12 18:58:29 +0300129 tcp_chr_disconnect_locked(chr);
Anton Nefedovb0a335e2017-02-02 17:26:29 +0300130 } /* else let the read handler finish it properly */
131 }
132
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300133 return ret;
134 } else {
Dima Stepanov27109442020-05-28 12:11:18 +0300135 /* Indicate an error. */
136 errno = EIO;
137 return -1;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300138 }
139}
140
141static int tcp_chr_read_poll(void *opaque)
142{
143 Chardev *chr = CHARDEV(opaque);
144 SocketChardev *s = SOCKET_CHARDEV(opaque);
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +0000145 if (s->state != TCP_CHARDEV_STATE_CONNECTED) {
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300146 return 0;
147 }
148 s->max_size = qemu_chr_be_can_write(chr);
149 return s->max_size;
150}
151
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300152static void tcp_chr_process_IAC_bytes(Chardev *chr,
153 SocketChardev *s,
154 uint8_t *buf, int *size)
155{
Jing Liuae92cbd2016-09-23 08:06:11 +0200156 /* Handle any telnet or tn3270 client's basic IAC options.
157 * For telnet options, it satisfies char by char mode with no echo.
158 * For tn3270 options, it satisfies binary mode with EOR.
159 * All IAC options will be removed from the buf and the do_opt
160 * pointer will be used to track the state of the width of the
161 * IAC information.
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300162 *
Jing Liuae92cbd2016-09-23 08:06:11 +0200163 * RFC854: "All TELNET commands consist of at least a two byte sequence.
164 * The commands dealing with option negotiation are three byte sequences,
165 * the third byte being the code for the option referenced."
166 * "IAC BREAK", "IAC IP", "IAC NOP" and the double IAC are two bytes.
167 * "IAC SB", "IAC SE" and "IAC EOR" are saved to split up data boundary
168 * for tn3270.
169 * NOP, Break and Interrupt Process(IP) might be encountered during a TN3270
170 * session, and NOP and IP need to be done later.
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300171 */
172
173 int i;
174 int j = 0;
175
176 for (i = 0; i < *size; i++) {
177 if (s->do_telnetopt > 1) {
178 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
179 /* Double IAC means send an IAC */
180 if (j != i) {
181 buf[j] = buf[i];
182 }
183 j++;
184 s->do_telnetopt = 1;
185 } else {
186 if ((unsigned char)buf[i] == IAC_BREAK
187 && s->do_telnetopt == 2) {
188 /* Handle IAC break commands by sending a serial break */
189 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
190 s->do_telnetopt++;
Jing Liuae92cbd2016-09-23 08:06:11 +0200191 } else if (s->is_tn3270 && ((unsigned char)buf[i] == IAC_EOR
192 || (unsigned char)buf[i] == IAC_SB
193 || (unsigned char)buf[i] == IAC_SE)
194 && s->do_telnetopt == 2) {
195 buf[j++] = IAC;
196 buf[j++] = buf[i];
197 s->do_telnetopt++;
198 } else if (s->is_tn3270 && ((unsigned char)buf[i] == IAC_IP
199 || (unsigned char)buf[i] == IAC_NOP)
200 && s->do_telnetopt == 2) {
201 /* TODO: IP and NOP need to be implemented later. */
202 s->do_telnetopt++;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300203 }
204 s->do_telnetopt++;
205 }
206 if (s->do_telnetopt >= 4) {
207 s->do_telnetopt = 1;
208 }
209 } else {
210 if ((unsigned char)buf[i] == IAC) {
211 s->do_telnetopt = 2;
212 } else {
213 if (j != i) {
214 buf[j] = buf[i];
215 }
216 j++;
217 }
218 }
219 }
220 *size = j;
221}
222
223static int tcp_get_msgfds(Chardev *chr, int *fds, int num)
224{
225 SocketChardev *s = SOCKET_CHARDEV(chr);
226
227 int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num;
228
229 assert(num <= TCP_MAX_FDS);
230
231 if (to_copy) {
232 int i;
233
234 memcpy(fds, s->read_msgfds, to_copy * sizeof(int));
235
236 /* Close unused fds */
237 for (i = to_copy; i < s->read_msgfds_num; i++) {
238 close(s->read_msgfds[i]);
239 }
240
241 g_free(s->read_msgfds);
242 s->read_msgfds = 0;
243 s->read_msgfds_num = 0;
244 }
245
246 return to_copy;
247}
248
249static int tcp_set_msgfds(Chardev *chr, int *fds, int num)
250{
251 SocketChardev *s = SOCKET_CHARDEV(chr);
252
253 /* clear old pending fd array */
254 g_free(s->write_msgfds);
255 s->write_msgfds = NULL;
256 s->write_msgfds_num = 0;
257
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +0000258 if ((s->state != TCP_CHARDEV_STATE_CONNECTED) ||
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300259 !qio_channel_has_feature(s->ioc,
260 QIO_CHANNEL_FEATURE_FD_PASS)) {
261 return -1;
262 }
263
264 if (num) {
265 s->write_msgfds = g_new(int, num);
266 memcpy(s->write_msgfds, fds, num * sizeof(int));
267 }
268
269 s->write_msgfds_num = num;
270
271 return 0;
272}
273
274static ssize_t tcp_chr_recv(Chardev *chr, char *buf, size_t len)
275{
276 SocketChardev *s = SOCKET_CHARDEV(chr);
277 struct iovec iov = { .iov_base = buf, .iov_len = len };
278 int ret;
279 size_t i;
280 int *msgfds = NULL;
281 size_t msgfds_num = 0;
282
283 if (qio_channel_has_feature(s->ioc, QIO_CHANNEL_FEATURE_FD_PASS)) {
284 ret = qio_channel_readv_full(s->ioc, &iov, 1,
285 &msgfds, &msgfds_num,
286 NULL);
287 } else {
288 ret = qio_channel_readv_full(s->ioc, &iov, 1,
289 NULL, NULL,
290 NULL);
291 }
292
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300293 if (msgfds_num) {
294 /* close and clean read_msgfds */
295 for (i = 0; i < s->read_msgfds_num; i++) {
296 close(s->read_msgfds[i]);
297 }
298
299 if (s->read_msgfds_num) {
300 g_free(s->read_msgfds);
301 }
302
303 s->read_msgfds = msgfds;
304 s->read_msgfds_num = msgfds_num;
305 }
306
307 for (i = 0; i < s->read_msgfds_num; i++) {
308 int fd = s->read_msgfds[i];
309 if (fd < 0) {
310 continue;
311 }
312
313 /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
314 qemu_set_block(fd);
315
316#ifndef MSG_CMSG_CLOEXEC
317 qemu_set_cloexec(fd);
318#endif
319 }
320
Roman Kagane8797502021-11-11 18:33:46 +0300321 if (ret == QIO_CHANNEL_ERR_BLOCK) {
322 errno = EAGAIN;
323 ret = -1;
324 } else if (ret == -1) {
325 errno = EIO;
326 }
327
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300328 return ret;
329}
330
331static GSource *tcp_chr_add_watch(Chardev *chr, GIOCondition cond)
332{
333 SocketChardev *s = SOCKET_CHARDEV(chr);
Pavel Dovgalyuk6585b162021-02-09 08:49:30 +0300334 if (!s->ioc) {
335 return NULL;
336 }
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300337 return qio_channel_create_watch(s->ioc, cond);
338}
339
Marc-André Lureaudfe9ea22018-08-17 15:52:23 +0200340static void remove_hup_source(SocketChardev *s)
341{
342 if (s->hup_source != NULL) {
343 g_source_destroy(s->hup_source);
344 g_source_unref(s->hup_source);
345 s->hup_source = NULL;
346 }
347}
348
Lukas Straub1a92d6d2021-03-23 18:52:42 +0100349static void char_socket_yank_iochannel(void *opaque)
350{
351 QIOChannel *ioc = QIO_CHANNEL(opaque);
352
353 qio_channel_shutdown(ioc, QIO_CHANNEL_SHUTDOWN_BOTH, NULL);
354}
355
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300356static void tcp_chr_free_connection(Chardev *chr)
357{
358 SocketChardev *s = SOCKET_CHARDEV(chr);
359 int i;
360
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300361 if (s->read_msgfds_num) {
362 for (i = 0; i < s->read_msgfds_num; i++) {
363 close(s->read_msgfds[i]);
364 }
365 g_free(s->read_msgfds);
366 s->read_msgfds = NULL;
367 s->read_msgfds_num = 0;
368 }
369
Marc-André Lureaudfe9ea22018-08-17 15:52:23 +0200370 remove_hup_source(s);
Klim Kireeva8aa6192018-01-25 16:51:29 +0300371
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300372 tcp_set_msgfds(chr, NULL, 0);
zhanghailiangb19456d2017-04-19 09:15:32 +0800373 remove_fd_in_watch(chr);
Marc-André Lureauebae6472021-02-04 14:52:31 +0400374 if (s->registered_yank &&
375 (s->state == TCP_CHARDEV_STATE_CONNECTING
376 || s->state == TCP_CHARDEV_STATE_CONNECTED)) {
Lukas Straub8ee44802020-12-28 16:08:48 +0100377 yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label),
Lukas Straub1a92d6d2021-03-23 18:52:42 +0100378 char_socket_yank_iochannel,
Lukas Straub8ee44802020-12-28 16:08:48 +0100379 QIO_CHANNEL(s->sioc));
380 }
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300381 object_unref(OBJECT(s->sioc));
382 s->sioc = NULL;
383 object_unref(OBJECT(s->ioc));
384 s->ioc = NULL;
385 g_free(chr->filename);
386 chr->filename = NULL;
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +0000387 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300388}
389
Julia Suvorova4493b6a2018-10-19 01:34:59 +0300390static const char *qemu_chr_socket_protocol(SocketChardev *s)
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300391{
Julia Suvorova4493b6a2018-10-19 01:34:59 +0300392 if (s->is_telnet) {
393 return "telnet";
394 }
Julia Suvorova981b06e2018-10-19 01:35:00 +0300395 return s->is_websock ? "websocket" : "tcp";
Julia Suvorova4493b6a2018-10-19 01:34:59 +0300396}
397
398static char *qemu_chr_socket_address(SocketChardev *s, const char *prefix)
399{
400 switch (s->addr->type) {
Markus Armbrusterbd269eb2017-04-26 09:36:41 +0200401 case SOCKET_ADDRESS_TYPE_INET:
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300402 return g_strdup_printf("%s%s:%s:%s%s", prefix,
Julia Suvorova4493b6a2018-10-19 01:34:59 +0300403 qemu_chr_socket_protocol(s),
404 s->addr->u.inet.host,
405 s->addr->u.inet.port,
Paolo Bonzini9d902d52021-02-25 12:05:22 +0100406 s->is_listen ? ",server=on" : "");
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300407 break;
Markus Armbrusterbd269eb2017-04-26 09:36:41 +0200408 case SOCKET_ADDRESS_TYPE_UNIX:
Markus Armbrusterdea7cd12020-11-02 10:44:20 +0100409 {
410 const char *tight = "", *abstract = "";
411 UnixSocketAddress *sa = &s->addr->u.q_unix;
412
Markus Armbruster8acefc72020-11-02 10:44:22 +0100413#ifdef CONFIG_LINUX
Markus Armbrusterdea7cd12020-11-02 10:44:20 +0100414 if (sa->has_abstract && sa->abstract) {
Marc-André Lureau30f80be2021-07-21 16:55:53 +0400415 abstract = ",abstract=on";
Markus Armbrusterdea7cd12020-11-02 10:44:20 +0100416 if (sa->has_tight && sa->tight) {
Marc-André Lureau30f80be2021-07-21 16:55:53 +0400417 tight = ",tight=on";
Markus Armbrusterdea7cd12020-11-02 10:44:20 +0100418 }
419 }
Markus Armbruster8acefc72020-11-02 10:44:22 +0100420#endif
Markus Armbrusterdea7cd12020-11-02 10:44:20 +0100421
422 return g_strdup_printf("%sunix:%s%s%s%s", prefix, sa->path,
423 abstract, tight,
Paolo Bonzini9d902d52021-02-25 12:05:22 +0100424 s->is_listen ? ",server=on" : "");
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300425 break;
Markus Armbrusterdea7cd12020-11-02 10:44:20 +0100426 }
Markus Armbrusterbd269eb2017-04-26 09:36:41 +0200427 case SOCKET_ADDRESS_TYPE_FD:
Julia Suvorova4493b6a2018-10-19 01:34:59 +0300428 return g_strdup_printf("%sfd:%s%s", prefix, s->addr->u.fd.str,
Paolo Bonzini9d902d52021-02-25 12:05:22 +0100429 s->is_listen ? ",server=on" : "");
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300430 break;
Markus Armbrusterbd269eb2017-04-26 09:36:41 +0200431 case SOCKET_ADDRESS_TYPE_VSOCK:
Markus Armbrusterd2e49aa2017-03-30 19:43:10 +0200432 return g_strdup_printf("%svsock:%s:%s", prefix,
Julia Suvorova4493b6a2018-10-19 01:34:59 +0300433 s->addr->u.vsock.cid,
434 s->addr->u.vsock.port);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300435 default:
436 abort();
437 }
438}
439
Marc-André Lureaubbcde962016-12-20 15:32:31 +0100440static void update_disconnected_filename(SocketChardev *s)
441{
442 Chardev *chr = CHARDEV(s);
443
444 g_free(chr->filename);
Marc-André Lureau90a6d172017-07-04 18:53:35 +0200445 if (s->addr) {
Julia Suvorova4493b6a2018-10-19 01:34:59 +0300446 chr->filename = qemu_chr_socket_address(s, "disconnected:");
Marc-André Lureau90a6d172017-07-04 18:53:35 +0200447 } else {
448 chr->filename = g_strdup("disconnected:socket");
449 }
Marc-André Lureaubbcde962016-12-20 15:32:31 +0100450}
451
Daniel P. Berrange9cca7572017-10-05 16:50:57 +0100452/* NB may be called even if tcp_chr_connect has not been
453 * reached, due to TLS or telnet initialization failure,
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +0000454 * so can *not* assume s->state == TCP_CHARDEV_STATE_CONNECTED
Alberto Garcia78d01592019-08-12 18:58:29 +0300455 * This must be called with chr->chr_write_lock held.
Daniel P. Berrange9cca7572017-10-05 16:50:57 +0100456 */
Alberto Garcia78d01592019-08-12 18:58:29 +0300457static void tcp_chr_disconnect_locked(Chardev *chr)
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300458{
459 SocketChardev *s = SOCKET_CHARDEV(chr);
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +0000460 bool emit_close = s->state == TCP_CHARDEV_STATE_CONNECTED;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300461
462 tcp_chr_free_connection(chr);
463
Daniel P. Berrange194b7f02017-12-18 13:54:17 +0000464 if (s->listener) {
Peter Xu3da9de52018-03-06 13:33:14 +0800465 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept,
466 chr, NULL, chr->gcontext);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300467 }
Marc-André Lureaubbcde962016-12-20 15:32:31 +0100468 update_disconnected_filename(s);
Daniel P. Berrange9cca7572017-10-05 16:50:57 +0100469 if (emit_close) {
470 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
471 }
Li Feng2b61bb72020-05-22 10:55:54 +0800472 if (s->reconnect_time && !s->reconnect_timer) {
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300473 qemu_chr_socket_restart_timer(chr);
474 }
475}
476
Alberto Garcia78d01592019-08-12 18:58:29 +0300477static void tcp_chr_disconnect(Chardev *chr)
478{
479 qemu_mutex_lock(&chr->chr_write_lock);
480 tcp_chr_disconnect_locked(chr);
481 qemu_mutex_unlock(&chr->chr_write_lock);
482}
483
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300484static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
485{
486 Chardev *chr = CHARDEV(opaque);
487 SocketChardev *s = SOCKET_CHARDEV(opaque);
488 uint8_t buf[CHR_READ_BUF_LEN];
489 int len, size;
490
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +0000491 if ((s->state != TCP_CHARDEV_STATE_CONNECTED) ||
492 s->max_size <= 0) {
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300493 return TRUE;
494 }
495 len = sizeof(buf);
496 if (len > s->max_size) {
497 len = s->max_size;
498 }
499 size = tcp_chr_recv(chr, (void *)buf, len);
Daniel P. Berrangéc863fde2018-02-22 12:13:51 +0000500 if (size == 0 || (size == -1 && errno != EAGAIN)) {
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300501 /* connection closed */
502 tcp_chr_disconnect(chr);
503 } else if (size > 0) {
504 if (s->do_telnetopt) {
505 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
506 }
507 if (size > 0) {
508 qemu_chr_be_write(chr, buf, size);
509 }
510 }
511
512 return TRUE;
513}
514
Klim Kireeva8aa6192018-01-25 16:51:29 +0300515static gboolean tcp_chr_hup(QIOChannel *channel,
516 GIOCondition cond,
517 void *opaque)
518{
519 Chardev *chr = CHARDEV(opaque);
520 tcp_chr_disconnect(chr);
521 return G_SOURCE_REMOVE;
522}
523
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300524static int tcp_chr_sync_read(Chardev *chr, const uint8_t *buf, int len)
525{
526 SocketChardev *s = SOCKET_CHARDEV(chr);
527 int size;
Roman Kagan66626502021-11-11 18:33:47 +0300528 int saved_errno;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300529
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +0000530 if (s->state != TCP_CHARDEV_STATE_CONNECTED) {
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300531 return 0;
532 }
533
Marc-André Lureaubcdeb9b2017-07-06 19:03:53 +0200534 qio_channel_set_blocking(s->ioc, true, NULL);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300535 size = tcp_chr_recv(chr, (void *) buf, len);
Roman Kagan66626502021-11-11 18:33:47 +0300536 saved_errno = errno;
Sai Pavan Boddu4d1d4602020-04-19 15:21:40 +0530537 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) {
538 qio_channel_set_blocking(s->ioc, false, NULL);
539 }
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300540 if (size == 0) {
541 /* connection closed */
542 tcp_chr_disconnect(chr);
543 }
544
Roman Kagan66626502021-11-11 18:33:47 +0300545 errno = saved_errno;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300546 return size;
547}
548
Julia Suvorova4493b6a2018-10-19 01:34:59 +0300549static char *qemu_chr_compute_filename(SocketChardev *s)
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300550{
Julia Suvorova4493b6a2018-10-19 01:34:59 +0300551 struct sockaddr_storage *ss = &s->sioc->localAddr;
552 struct sockaddr_storage *ps = &s->sioc->remoteAddr;
553 socklen_t ss_len = s->sioc->localAddrLen;
554 socklen_t ps_len = s->sioc->remoteAddrLen;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300555 char shost[NI_MAXHOST], sserv[NI_MAXSERV];
556 char phost[NI_MAXHOST], pserv[NI_MAXSERV];
557 const char *left = "", *right = "";
558
559 switch (ss->ss_family) {
560#ifndef _WIN32
561 case AF_UNIX:
562 return g_strdup_printf("unix:%s%s",
563 ((struct sockaddr_un *)(ss))->sun_path,
Paolo Bonzini9d902d52021-02-25 12:05:22 +0100564 s->is_listen ? ",server=on" : "");
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300565#endif
566 case AF_INET6:
567 left = "[";
568 right = "]";
569 /* fall through */
570 case AF_INET:
571 getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost),
572 sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV);
573 getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost),
574 pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV);
575 return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s",
Julia Suvorova4493b6a2018-10-19 01:34:59 +0300576 qemu_chr_socket_protocol(s),
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300577 left, shost, right, sserv,
Paolo Bonzini9d902d52021-02-25 12:05:22 +0100578 s->is_listen ? ",server=on" : "",
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300579 left, phost, right, pserv);
580
581 default:
582 return g_strdup_printf("unknown");
583 }
584}
585
Marc-André Lureaudfe9ea22018-08-17 15:52:23 +0200586static void update_ioc_handlers(SocketChardev *s)
587{
588 Chardev *chr = CHARDEV(s);
589
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +0000590 if (s->state != TCP_CHARDEV_STATE_CONNECTED) {
Marc-André Lureaudfe9ea22018-08-17 15:52:23 +0200591 return;
592 }
593
594 remove_fd_in_watch(chr);
595 chr->gsource = io_add_watch_poll(chr, s->ioc,
596 tcp_chr_read_poll,
597 tcp_chr_read, chr,
598 chr->gcontext);
599
600 remove_hup_source(s);
601 s->hup_source = qio_channel_create_watch(s->ioc, G_IO_HUP);
602 g_source_set_callback(s->hup_source, (GSourceFunc)tcp_chr_hup,
603 chr, NULL);
604 g_source_attach(s->hup_source, chr->gcontext);
605}
606
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300607static void tcp_chr_connect(void *opaque)
608{
609 Chardev *chr = CHARDEV(opaque);
610 SocketChardev *s = SOCKET_CHARDEV(opaque);
611
612 g_free(chr->filename);
Julia Suvorova4493b6a2018-10-19 01:34:59 +0300613 chr->filename = qemu_chr_compute_filename(s);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300614
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +0000615 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTED);
Marc-André Lureaudfe9ea22018-08-17 15:52:23 +0200616 update_ioc_handlers(s);
Marc-André Lureau63618132016-12-14 14:23:02 +0300617 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300618}
619
Peter Xuce1230c2018-03-06 13:33:15 +0800620static void tcp_chr_telnet_destroy(SocketChardev *s)
621{
622 if (s->telnet_source) {
623 g_source_destroy(s->telnet_source);
624 g_source_unref(s->telnet_source);
625 s->telnet_source = NULL;
626 }
627}
628
Peter Xubb86d052017-09-21 14:35:54 +0800629static void tcp_chr_update_read_handler(Chardev *chr)
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300630{
631 SocketChardev *s = SOCKET_CHARDEV(chr);
632
Paolo Bonzini5b774fe2019-02-20 15:33:27 +0100633 if (s->listener && s->state == TCP_CHARDEV_STATE_DISCONNECTED) {
Peter Xu3da9de52018-03-06 13:33:14 +0800634 /*
635 * It's possible that chardev context is changed in
636 * qemu_chr_be_update_read_handlers(). Reset it for QIO net
637 * listener if there is.
638 */
639 qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept,
640 chr, NULL, chr->gcontext);
641 }
642
Peter Xuce1230c2018-03-06 13:33:15 +0800643 if (s->telnet_source) {
644 tcp_chr_telnet_init(CHARDEV(s));
645 }
646
Marc-André Lureaudfe9ea22018-08-17 15:52:23 +0200647 update_ioc_handlers(s);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300648}
649
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300650static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc,
651 GIOCondition cond G_GNUC_UNUSED,
652 gpointer user_data)
653{
Peter Xuce1230c2018-03-06 13:33:15 +0800654 SocketChardev *s = user_data;
655 Chardev *chr = CHARDEV(s);
656 TCPChardevTelnetInit *init = s->telnet_init;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300657 ssize_t ret;
658
Peter Xuce1230c2018-03-06 13:33:15 +0800659 assert(init);
660
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300661 ret = qio_channel_write(ioc, init->buf, init->buflen, NULL);
662 if (ret < 0) {
663 if (ret == QIO_CHANNEL_ERR_BLOCK) {
664 ret = 0;
665 } else {
Peter Xuce1230c2018-03-06 13:33:15 +0800666 tcp_chr_disconnect(chr);
Peter Xu8b2ec542018-03-01 16:44:24 +0800667 goto end;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300668 }
669 }
670 init->buflen -= ret;
671
672 if (init->buflen == 0) {
Peter Xuce1230c2018-03-06 13:33:15 +0800673 tcp_chr_connect(chr);
Peter Xu8b2ec542018-03-01 16:44:24 +0800674 goto end;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300675 }
676
677 memmove(init->buf, init->buf + ret, init->buflen);
678
Peter Xu8b2ec542018-03-01 16:44:24 +0800679 return G_SOURCE_CONTINUE;
680
681end:
Peter Xuce1230c2018-03-06 13:33:15 +0800682 g_free(s->telnet_init);
683 s->telnet_init = NULL;
684 g_source_unref(s->telnet_source);
685 s->telnet_source = NULL;
Peter Xu8b2ec542018-03-01 16:44:24 +0800686 return G_SOURCE_REMOVE;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300687}
688
689static void tcp_chr_telnet_init(Chardev *chr)
690{
691 SocketChardev *s = SOCKET_CHARDEV(chr);
Peter Xuce1230c2018-03-06 13:33:15 +0800692 TCPChardevTelnetInit *init;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300693 size_t n = 0;
694
Peter Xuce1230c2018-03-06 13:33:15 +0800695 /* Destroy existing task */
696 tcp_chr_telnet_destroy(s);
697
698 if (s->telnet_init) {
699 /* We are possibly during a handshake already */
700 goto cont;
701 }
702
703 s->telnet_init = g_new0(TCPChardevTelnetInit, 1);
704 init = s->telnet_init;
705
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300706#define IACSET(x, a, b, c) \
707 do { \
708 x[n++] = a; \
709 x[n++] = b; \
710 x[n++] = c; \
711 } while (0)
712
Jing Liuae92cbd2016-09-23 08:06:11 +0200713 if (!s->is_tn3270) {
714 init->buflen = 12;
715 /* Prep the telnet negotion to put telnet in binary,
716 * no echo, single char mode */
717 IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
718 IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
719 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
720 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
721 } else {
722 init->buflen = 21;
723 /* Prep the TN3270 negotion based on RFC1576 */
724 IACSET(init->buf, 0xff, 0xfd, 0x19); /* IAC DO EOR */
725 IACSET(init->buf, 0xff, 0xfb, 0x19); /* IAC WILL EOR */
726 IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO BINARY */
727 IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL BINARY */
728 IACSET(init->buf, 0xff, 0xfd, 0x18); /* IAC DO TERMINAL TYPE */
729 IACSET(init->buf, 0xff, 0xfa, 0x18); /* IAC SB TERMINAL TYPE */
730 IACSET(init->buf, 0x01, 0xff, 0xf0); /* SEND IAC SE */
731 }
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300732
733#undef IACSET
734
Peter Xuce1230c2018-03-06 13:33:15 +0800735cont:
736 s->telnet_source = qio_channel_add_watch_source(s->ioc, G_IO_OUT,
737 tcp_chr_telnet_init_io,
738 s, NULL,
739 chr->gcontext);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300740}
741
742
Julia Suvorova981b06e2018-10-19 01:35:00 +0300743static void tcp_chr_websock_handshake(QIOTask *task, gpointer user_data)
744{
745 Chardev *chr = user_data;
746 SocketChardev *s = user_data;
747
748 if (qio_task_propagate_error(task, NULL)) {
749 tcp_chr_disconnect(chr);
750 } else {
751 if (s->do_telnetopt) {
752 tcp_chr_telnet_init(chr);
753 } else {
754 tcp_chr_connect(chr);
755 }
756 }
757}
758
759
760static void tcp_chr_websock_init(Chardev *chr)
761{
762 SocketChardev *s = SOCKET_CHARDEV(chr);
763 QIOChannelWebsock *wioc = NULL;
764 gchar *name;
765
766 wioc = qio_channel_websock_new_server(s->ioc);
767
768 name = g_strdup_printf("chardev-websocket-server-%s", chr->label);
769 qio_channel_set_name(QIO_CHANNEL(wioc), name);
770 g_free(name);
771 object_unref(OBJECT(s->ioc));
772 s->ioc = QIO_CHANNEL(wioc);
773
774 qio_channel_websock_handshake(wioc, tcp_chr_websock_handshake, chr, NULL);
775}
776
777
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300778static void tcp_chr_tls_handshake(QIOTask *task,
779 gpointer user_data)
780{
781 Chardev *chr = user_data;
782 SocketChardev *s = user_data;
783
784 if (qio_task_propagate_error(task, NULL)) {
785 tcp_chr_disconnect(chr);
786 } else {
Julia Suvorova981b06e2018-10-19 01:35:00 +0300787 if (s->is_websock) {
788 tcp_chr_websock_init(chr);
789 } else if (s->do_telnetopt) {
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300790 tcp_chr_telnet_init(chr);
791 } else {
792 tcp_chr_connect(chr);
793 }
794 }
795}
796
797
798static void tcp_chr_tls_init(Chardev *chr)
799{
800 SocketChardev *s = SOCKET_CHARDEV(chr);
801 QIOChannelTLS *tioc;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300802 gchar *name;
803
804 if (s->is_listen) {
805 tioc = qio_channel_tls_new_server(
806 s->ioc, s->tls_creds,
Daniel P. Berrangefd4a5fd2019-03-08 15:21:50 +0000807 s->tls_authz,
Markus Armbruster9261ef52020-06-30 11:03:28 +0200808 NULL);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300809 } else {
810 tioc = qio_channel_tls_new_client(
811 s->ioc, s->tls_creds,
Markus Armbrusterbd269eb2017-04-26 09:36:41 +0200812 s->addr->u.inet.host,
Markus Armbruster9261ef52020-06-30 11:03:28 +0200813 NULL);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300814 }
815 if (tioc == NULL) {
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300816 tcp_chr_disconnect(chr);
817 return;
818 }
819 name = g_strdup_printf("chardev-tls-%s-%s",
820 s->is_listen ? "server" : "client",
821 chr->label);
822 qio_channel_set_name(QIO_CHANNEL(tioc), name);
823 g_free(name);
824 object_unref(OBJECT(s->ioc));
825 s->ioc = QIO_CHANNEL(tioc);
826
827 qio_channel_tls_handshake(tioc,
828 tcp_chr_tls_handshake,
829 chr,
Peter Xu1939ccd2018-03-05 14:43:24 +0800830 NULL,
Peter Xu05b6cc42018-03-06 13:33:19 +0800831 chr->gcontext);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300832}
833
834
835static void tcp_chr_set_client_ioc_name(Chardev *chr,
836 QIOChannelSocket *sioc)
837{
838 SocketChardev *s = SOCKET_CHARDEV(chr);
839 char *name;
840 name = g_strdup_printf("chardev-tcp-%s-%s",
841 s->is_listen ? "server" : "client",
842 chr->label);
843 qio_channel_set_name(QIO_CHANNEL(sioc), name);
844 g_free(name);
845
846}
847
848static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc)
849{
850 SocketChardev *s = SOCKET_CHARDEV(chr);
851
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +0000852 if (s->state != TCP_CHARDEV_STATE_CONNECTING) {
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300853 return -1;
854 }
855
856 s->ioc = QIO_CHANNEL(sioc);
857 object_ref(OBJECT(sioc));
858 s->sioc = sioc;
859 object_ref(OBJECT(sioc));
860
861 qio_channel_set_blocking(s->ioc, false, NULL);
862
863 if (s->do_nodelay) {
864 qio_channel_set_delay(s->ioc, false);
865 }
Daniel P. Berrange194b7f02017-12-18 13:54:17 +0000866 if (s->listener) {
Peter Xu3da9de52018-03-06 13:33:14 +0800867 qio_net_listener_set_client_func_full(s->listener, NULL, NULL,
868 NULL, chr->gcontext);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300869 }
870
871 if (s->tls_creds) {
872 tcp_chr_tls_init(chr);
Julia Suvorova981b06e2018-10-19 01:35:00 +0300873 } else if (s->is_websock) {
874 tcp_chr_websock_init(chr);
875 } else if (s->do_telnetopt) {
876 tcp_chr_telnet_init(chr);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300877 } else {
Julia Suvorova981b06e2018-10-19 01:35:00 +0300878 tcp_chr_connect(chr);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300879 }
880
881 return 0;
882}
883
884
885static int tcp_chr_add_client(Chardev *chr, int fd)
886{
887 int ret;
888 QIOChannelSocket *sioc;
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +0000889 SocketChardev *s = SOCKET_CHARDEV(chr);
890
891 if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) {
892 return -1;
893 }
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300894
895 sioc = qio_channel_socket_new_fd(fd, NULL);
896 if (!sioc) {
897 return -1;
898 }
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +0000899 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300900 tcp_chr_set_client_ioc_name(chr, sioc);
Marc-André Lureauebae6472021-02-04 14:52:31 +0400901 if (s->registered_yank) {
902 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
Lukas Straub1a92d6d2021-03-23 18:52:42 +0100903 char_socket_yank_iochannel,
Marc-André Lureauebae6472021-02-04 14:52:31 +0400904 QIO_CHANNEL(sioc));
905 }
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300906 ret = tcp_chr_new_client(chr, sioc);
907 object_unref(OBJECT(sioc));
908 return ret;
909}
910
Daniel P. Berrange194b7f02017-12-18 13:54:17 +0000911static void tcp_chr_accept(QIONetListener *listener,
912 QIOChannelSocket *cioc,
913 void *opaque)
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300914{
915 Chardev *chr = CHARDEV(opaque);
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +0000916 SocketChardev *s = SOCKET_CHARDEV(chr);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300917
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +0000918 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
Daniel P. Berrange194b7f02017-12-18 13:54:17 +0000919 tcp_chr_set_client_ioc_name(chr, cioc);
Marc-André Lureauebae6472021-02-04 14:52:31 +0400920 if (s->registered_yank) {
921 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
Lukas Straub1a92d6d2021-03-23 18:52:42 +0100922 char_socket_yank_iochannel,
Marc-André Lureauebae6472021-02-04 14:52:31 +0400923 QIO_CHANNEL(cioc));
924 }
Daniel P. Berrange194b7f02017-12-18 13:54:17 +0000925 tcp_chr_new_client(chr, cioc);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300926}
927
Daniel P. Berrangéefae0b92019-02-11 18:24:35 +0000928
929static int tcp_chr_connect_client_sync(Chardev *chr, Error **errp)
930{
931 SocketChardev *s = SOCKET_CHARDEV(chr);
932 QIOChannelSocket *sioc = qio_channel_socket_new();
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +0000933 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
Daniel P. Berrangéefae0b92019-02-11 18:24:35 +0000934 tcp_chr_set_client_ioc_name(chr, sioc);
935 if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) {
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +0000936 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED);
Daniel P. Berrangéefae0b92019-02-11 18:24:35 +0000937 object_unref(OBJECT(sioc));
938 return -1;
939 }
Marc-André Lureauebae6472021-02-04 14:52:31 +0400940 if (s->registered_yank) {
941 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
Lukas Straub1a92d6d2021-03-23 18:52:42 +0100942 char_socket_yank_iochannel,
Marc-André Lureauebae6472021-02-04 14:52:31 +0400943 QIO_CHANNEL(sioc));
944 }
Daniel P. Berrangéefae0b92019-02-11 18:24:35 +0000945 tcp_chr_new_client(chr, sioc);
946 object_unref(OBJECT(sioc));
947 return 0;
948}
949
950
951static void tcp_chr_accept_server_sync(Chardev *chr)
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300952{
953 SocketChardev *s = SOCKET_CHARDEV(chr);
954 QIOChannelSocket *sioc;
Daniel P. Berrangéefae0b92019-02-11 18:24:35 +0000955 info_report("QEMU waiting for connection on: %s",
956 chr->filename);
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +0000957 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
Daniel P. Berrangéefae0b92019-02-11 18:24:35 +0000958 sioc = qio_net_listener_wait_client(s->listener);
959 tcp_chr_set_client_ioc_name(chr, sioc);
Marc-André Lureauebae6472021-02-04 14:52:31 +0400960 if (s->registered_yank) {
961 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
Lukas Straub1a92d6d2021-03-23 18:52:42 +0100962 char_socket_yank_iochannel,
Marc-André Lureauebae6472021-02-04 14:52:31 +0400963 QIO_CHANNEL(sioc));
964 }
Daniel P. Berrangéefae0b92019-02-11 18:24:35 +0000965 tcp_chr_new_client(chr, sioc);
966 object_unref(OBJECT(sioc));
967}
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +0300968
Daniel P. Berrangéefae0b92019-02-11 18:24:35 +0000969
970static int tcp_chr_wait_connected(Chardev *chr, Error **errp)
971{
972 SocketChardev *s = SOCKET_CHARDEV(chr);
Daniel P. Berrangéd1885e52019-02-11 18:24:39 +0000973 const char *opts[] = { "telnet", "tn3270", "websock", "tls-creds" };
974 bool optset[] = { s->is_telnet, s->is_tn3270, s->is_websock, s->tls_creds };
975 size_t i;
976
977 QEMU_BUILD_BUG_ON(G_N_ELEMENTS(opts) != G_N_ELEMENTS(optset));
978 for (i = 0; i < G_N_ELEMENTS(opts); i++) {
979 if (optset[i]) {
980 error_setg(errp,
981 "'%s' option is incompatible with waiting for "
982 "connection completion", opts[i]);
983 return -1;
984 }
985 }
986
Daniel P. Berrangé4b473732019-02-11 18:24:40 +0000987 tcp_chr_reconn_timer_cancel(s);
988
989 /*
990 * We expect states to be as follows:
991 *
992 * - server
993 * - wait -> CONNECTED
994 * - nowait -> DISCONNECTED
995 * - client
996 * - reconnect == 0 -> CONNECTED
997 * - reconnect != 0 -> CONNECTING
998 *
999 */
1000 if (s->state == TCP_CHARDEV_STATE_CONNECTING) {
1001 if (!s->connect_task) {
1002 error_setg(errp,
1003 "Unexpected 'connecting' state without connect task "
1004 "while waiting for connection completion");
1005 return -1;
1006 }
1007 /*
1008 * tcp_chr_wait_connected should only ever be run from the
1009 * main loop thread associated with chr->gcontext, otherwise
1010 * qio_task_wait_thread has a dangerous race condition with
1011 * free'ing of the s->connect_task object.
1012 *
1013 * Acquiring the main context doesn't 100% prove we're in
1014 * the main loop thread, but it does at least guarantee
1015 * that the main loop won't be executed by another thread
1016 * avoiding the race condition with the task idle callback.
1017 */
1018 g_main_context_acquire(chr->gcontext);
1019 qio_task_wait_thread(s->connect_task);
1020 g_main_context_release(chr->gcontext);
1021
1022 /*
1023 * The completion callback (qemu_chr_socket_connected) for
1024 * s->connect_task should have set this to NULL by the time
1025 * qio_task_wait_thread has returned.
1026 */
1027 assert(!s->connect_task);
1028
1029 /*
1030 * NB we are *not* guaranteed to have "s->state == ..CONNECTED"
1031 * at this point as this first connect may be failed, so
1032 * allow the next loop to run regardless.
1033 */
1034 }
1035
1036 while (s->state != TCP_CHARDEV_STATE_CONNECTED) {
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001037 if (s->is_listen) {
Daniel P. Berrangéefae0b92019-02-11 18:24:35 +00001038 tcp_chr_accept_server_sync(chr);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001039 } else {
Daniel P. Berrangé25d93b62019-02-11 18:24:38 +00001040 Error *err = NULL;
1041 if (tcp_chr_connect_client_sync(chr, &err) < 0) {
1042 if (s->reconnect_time) {
1043 error_free(err);
1044 g_usleep(s->reconnect_time * 1000ULL * 1000ULL);
1045 } else {
1046 error_propagate(errp, err);
1047 return -1;
1048 }
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001049 }
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001050 }
1051 }
1052
1053 return 0;
1054}
1055
1056static void char_socket_finalize(Object *obj)
1057{
1058 Chardev *chr = CHARDEV(obj);
1059 SocketChardev *s = SOCKET_CHARDEV(obj);
1060
1061 tcp_chr_free_connection(chr);
Peter Xu2c716ba2018-01-04 22:18:35 +08001062 tcp_chr_reconn_timer_cancel(s);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001063 qapi_free_SocketAddress(s->addr);
Peter Xuce1230c2018-03-06 13:33:15 +08001064 tcp_chr_telnet_destroy(s);
1065 g_free(s->telnet_init);
Daniel P. Berrange194b7f02017-12-18 13:54:17 +00001066 if (s->listener) {
Peter Xu3da9de52018-03-06 13:33:14 +08001067 qio_net_listener_set_client_func_full(s->listener, NULL, NULL,
1068 NULL, chr->gcontext);
Daniel P. Berrange194b7f02017-12-18 13:54:17 +00001069 object_unref(OBJECT(s->listener));
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001070 }
1071 if (s->tls_creds) {
1072 object_unref(OBJECT(s->tls_creds));
1073 }
Daniel P. Berrangefd4a5fd2019-03-08 15:21:50 +00001074 g_free(s->tls_authz);
Lukas Straub8ee44802020-12-28 16:08:48 +01001075 if (s->registered_yank) {
Lukas Straubfeb774c2021-03-30 20:13:31 +02001076 /*
1077 * In the chardev-change special-case, we shouldn't unregister the yank
1078 * instance, as it still may be needed.
1079 */
1080 if (!chr->handover_yank_instance) {
1081 yank_unregister_instance(CHARDEV_YANK_INSTANCE(chr->label));
1082 }
Lukas Straub8ee44802020-12-28 16:08:48 +01001083 }
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001084
1085 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1086}
1087
1088static void qemu_chr_socket_connected(QIOTask *task, void *opaque)
1089{
1090 QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task));
1091 Chardev *chr = CHARDEV(opaque);
1092 SocketChardev *s = SOCKET_CHARDEV(chr);
1093 Error *err = NULL;
1094
Daniel P. Berrangé4b473732019-02-11 18:24:40 +00001095 s->connect_task = NULL;
1096
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001097 if (qio_task_propagate_error(task, &err)) {
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +00001098 tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED);
Marc-André Lureauebae6472021-02-04 14:52:31 +04001099 if (s->registered_yank) {
1100 yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label),
Lukas Straub1a92d6d2021-03-23 18:52:42 +01001101 char_socket_yank_iochannel,
Marc-André Lureauebae6472021-02-04 14:52:31 +04001102 QIO_CHANNEL(sioc));
1103 }
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001104 check_report_connect_error(chr, err);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001105 goto cleanup;
1106 }
1107
1108 s->connect_err_reported = false;
1109 tcp_chr_new_client(chr, sioc);
1110
1111cleanup:
1112 object_unref(OBJECT(sioc));
1113}
1114
Daniel P. Berrangé4b473732019-02-11 18:24:40 +00001115
1116static void tcp_chr_connect_client_task(QIOTask *task,
1117 gpointer opaque)
1118{
1119 QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task));
1120 SocketAddress *addr = opaque;
1121 Error *err = NULL;
1122
1123 qio_channel_socket_connect_sync(ioc, addr, &err);
1124
1125 qio_task_set_error(task, err);
1126}
1127
1128
Daniel P. Berrangéefae0b92019-02-11 18:24:35 +00001129static void tcp_chr_connect_client_async(Chardev *chr)
Peter Xu3e7d4d22018-03-06 13:33:17 +08001130{
1131 SocketChardev *s = SOCKET_CHARDEV(chr);
1132 QIOChannelSocket *sioc;
1133
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +00001134 tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
Peter Xu3e7d4d22018-03-06 13:33:17 +08001135 sioc = qio_channel_socket_new();
1136 tcp_chr_set_client_ioc_name(chr, sioc);
Marc-André Lureauebae6472021-02-04 14:52:31 +04001137 if (s->registered_yank) {
1138 yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
Lukas Straub1a92d6d2021-03-23 18:52:42 +01001139 char_socket_yank_iochannel,
Marc-André Lureauebae6472021-02-04 14:52:31 +04001140 QIO_CHANNEL(sioc));
1141 }
Daniel P. Berrangé4b473732019-02-11 18:24:40 +00001142 /*
1143 * Normally code would use the qio_channel_socket_connect_async
1144 * method which uses a QIOTask + qio_task_set_error internally
1145 * to avoid blocking. The tcp_chr_wait_connected method, however,
1146 * needs a way to synchronize with completion of the background
1147 * connect task which can't be done with the QIOChannelSocket
1148 * async APIs. Thus we must use QIOTask directly to implement
1149 * the non-blocking concept locally.
1150 */
1151 s->connect_task = qio_task_new(OBJECT(sioc),
1152 qemu_chr_socket_connected,
Marc-André Lureau68066012020-04-20 13:20:12 +02001153 object_ref(OBJECT(chr)),
1154 (GDestroyNotify)object_unref);
Daniel P. Berrangé4b473732019-02-11 18:24:40 +00001155 qio_task_run_in_thread(s->connect_task,
1156 tcp_chr_connect_client_task,
1157 s->addr,
1158 NULL,
1159 chr->gcontext);
Peter Xu3e7d4d22018-03-06 13:33:17 +08001160}
1161
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001162static gboolean socket_reconnect_timeout(gpointer opaque)
1163{
1164 Chardev *chr = CHARDEV(opaque);
1165 SocketChardev *s = SOCKET_CHARDEV(opaque);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001166
Alberto Garcia78d01592019-08-12 18:58:29 +03001167 qemu_mutex_lock(&chr->chr_write_lock);
Peter Xu2c716ba2018-01-04 22:18:35 +08001168 g_source_unref(s->reconnect_timer);
1169 s->reconnect_timer = NULL;
Alberto Garcia78d01592019-08-12 18:58:29 +03001170 qemu_mutex_unlock(&chr->chr_write_lock);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001171
1172 if (chr->be_open) {
1173 return false;
1174 }
1175
Daniel P. Berrangéefae0b92019-02-11 18:24:35 +00001176 tcp_chr_connect_client_async(chr);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001177
1178 return false;
1179}
1180
Daniel P. Berrangé16459842019-02-11 18:24:29 +00001181
Daniel P. Berrangéb5e18e52019-02-11 18:24:36 +00001182static int qmp_chardev_open_socket_server(Chardev *chr,
1183 bool is_telnet,
1184 bool is_waitconnect,
1185 Error **errp)
1186{
1187 SocketChardev *s = SOCKET_CHARDEV(chr);
1188 char *name;
1189 if (is_telnet) {
1190 s->do_telnetopt = 1;
1191 }
1192 s->listener = qio_net_listener_new();
1193
1194 name = g_strdup_printf("chardev-tcp-listener-%s", chr->label);
1195 qio_net_listener_set_name(s->listener, name);
1196 g_free(name);
1197
Marc-André Lureau1b877512021-07-25 23:59:12 +04001198 if (s->addr->type == SOCKET_ADDRESS_TYPE_FD && !*s->addr->u.fd.str) {
1199 goto skip_listen;
1200 }
1201
Juan Quintelafc8135c2019-08-19 18:08:21 +02001202 if (qio_net_listener_open_sync(s->listener, s->addr, 1, errp) < 0) {
Daniel P. Berrangéb5e18e52019-02-11 18:24:36 +00001203 object_unref(OBJECT(s->listener));
1204 s->listener = NULL;
1205 return -1;
1206 }
1207
1208 qapi_free_SocketAddress(s->addr);
1209 s->addr = socket_local_address(s->listener->sioc[0]->fd, errp);
Marc-André Lureau1b877512021-07-25 23:59:12 +04001210
1211skip_listen:
Daniel P. Berrangéb5e18e52019-02-11 18:24:36 +00001212 update_disconnected_filename(s);
1213
1214 if (is_waitconnect) {
1215 tcp_chr_accept_server_sync(chr);
1216 } else {
1217 qio_net_listener_set_client_func_full(s->listener,
1218 tcp_chr_accept,
1219 chr, NULL,
1220 chr->gcontext);
1221 }
1222
1223 return 0;
1224}
1225
1226
1227static int qmp_chardev_open_socket_client(Chardev *chr,
1228 int64_t reconnect,
1229 Error **errp)
1230{
1231 SocketChardev *s = SOCKET_CHARDEV(chr);
1232
1233 if (reconnect > 0) {
1234 s->reconnect_time = reconnect;
1235 tcp_chr_connect_client_async(chr);
1236 return 0;
1237 } else {
1238 return tcp_chr_connect_client_sync(chr, errp);
1239 }
1240}
1241
1242
Daniel P. Berrangé16459842019-02-11 18:24:29 +00001243static bool qmp_chardev_validate_socket(ChardevSocket *sock,
1244 SocketAddress *addr,
1245 Error **errp)
1246{
1247 /* Validate any options which have a dependency on address type */
1248 switch (addr->type) {
1249 case SOCKET_ADDRESS_TYPE_FD:
1250 if (sock->has_reconnect) {
1251 error_setg(errp,
1252 "'reconnect' option is incompatible with "
1253 "'fd' address type");
1254 return false;
1255 }
1256 if (sock->has_tls_creds &&
1257 !(sock->has_server && sock->server)) {
1258 error_setg(errp,
1259 "'tls_creds' option is incompatible with "
1260 "'fd' address type as client");
1261 return false;
1262 }
1263 break;
1264
1265 case SOCKET_ADDRESS_TYPE_UNIX:
1266 if (sock->has_tls_creds) {
1267 error_setg(errp,
1268 "'tls_creds' option is incompatible with "
1269 "'unix' address type");
1270 return false;
1271 }
1272 break;
1273
1274 case SOCKET_ADDRESS_TYPE_INET:
1275 break;
1276
1277 case SOCKET_ADDRESS_TYPE_VSOCK:
1278 if (sock->has_tls_creds) {
1279 error_setg(errp,
1280 "'tls_creds' option is incompatible with "
1281 "'vsock' address type");
1282 return false;
1283 }
1284
1285 default:
1286 break;
1287 }
1288
Daniel P. Berrangefd4a5fd2019-03-08 15:21:50 +00001289 if (sock->has_tls_authz && !sock->has_tls_creds) {
1290 error_setg(errp, "'tls_authz' option requires 'tls_creds' option");
1291 return false;
1292 }
1293
Daniel P. Berrangé16459842019-02-11 18:24:29 +00001294 /* Validate any options which have a dependancy on client vs server */
Daniel P. Berrangé4a0582f2019-02-11 18:24:30 +00001295 if (!sock->has_server || sock->server) {
1296 if (sock->has_reconnect) {
1297 error_setg(errp,
1298 "'reconnect' option is incompatible with "
1299 "socket in server listen mode");
1300 return false;
1301 }
1302 } else {
Daniel P. Berrangé16459842019-02-11 18:24:29 +00001303 if (sock->has_websocket && sock->websocket) {
1304 error_setg(errp, "%s", "Websocket client is not implemented");
1305 return false;
1306 }
Daniel P. Berrangé767abe72019-02-11 18:24:31 +00001307 if (sock->has_wait) {
Daniel P. Berrangé24e13a42021-02-22 13:47:17 +00001308 error_setg(errp, "%s",
1309 "'wait' option is incompatible with "
1310 "socket in client connect mode");
1311 return false;
Daniel P. Berrangé767abe72019-02-11 18:24:31 +00001312 }
Daniel P. Berrangé16459842019-02-11 18:24:29 +00001313 }
1314
1315 return true;
1316}
1317
1318
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001319static void qmp_chardev_open_socket(Chardev *chr,
1320 ChardevBackend *backend,
1321 bool *be_opened,
1322 Error **errp)
1323{
1324 SocketChardev *s = SOCKET_CHARDEV(chr);
1325 ChardevSocket *sock = backend->u.socket.data;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001326 bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
1327 bool is_listen = sock->has_server ? sock->server : true;
1328 bool is_telnet = sock->has_telnet ? sock->telnet : false;
Jing Liuae92cbd2016-09-23 08:06:11 +02001329 bool is_tn3270 = sock->has_tn3270 ? sock->tn3270 : false;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001330 bool is_waitconnect = sock->has_wait ? sock->wait : false;
Julia Suvorova981b06e2018-10-19 01:35:00 +03001331 bool is_websock = sock->has_websocket ? sock->websocket : false;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001332 int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0;
Markus Armbrusterbd269eb2017-04-26 09:36:41 +02001333 SocketAddress *addr;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001334
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001335 s->is_listen = is_listen;
1336 s->is_telnet = is_telnet;
Jing Liuae92cbd2016-09-23 08:06:11 +02001337 s->is_tn3270 = is_tn3270;
Julia Suvorova981b06e2018-10-19 01:35:00 +03001338 s->is_websock = is_websock;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001339 s->do_nodelay = do_nodelay;
1340 if (sock->tls_creds) {
1341 Object *creds;
1342 creds = object_resolve_path_component(
1343 object_get_objects_root(), sock->tls_creds);
1344 if (!creds) {
1345 error_setg(errp, "No TLS credentials with id '%s'",
1346 sock->tls_creds);
Daniel P. Berrangée154fd72019-02-11 18:24:34 +00001347 return;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001348 }
1349 s->tls_creds = (QCryptoTLSCreds *)
1350 object_dynamic_cast(creds,
1351 TYPE_QCRYPTO_TLS_CREDS);
1352 if (!s->tls_creds) {
1353 error_setg(errp, "Object with id '%s' is not TLS credentials",
1354 sock->tls_creds);
Daniel P. Berrangée154fd72019-02-11 18:24:34 +00001355 return;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001356 }
1357 object_ref(OBJECT(s->tls_creds));
Philippe Mathieu-Daudé8612df22021-06-28 18:09:11 +02001358 if (!qcrypto_tls_creds_check_endpoint(s->tls_creds,
1359 is_listen
1360 ? QCRYPTO_TLS_CREDS_ENDPOINT_SERVER
1361 : QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT,
1362 errp)) {
1363 return;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001364 }
1365 }
Daniel P. Berrangefd4a5fd2019-03-08 15:21:50 +00001366 s->tls_authz = g_strdup(sock->tls_authz);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001367
Markus Armbrusterbd269eb2017-04-26 09:36:41 +02001368 s->addr = addr = socket_address_flatten(sock->addr);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001369
Daniel P. Berrangé16459842019-02-11 18:24:29 +00001370 if (!qmp_chardev_validate_socket(sock, addr, errp)) {
Daniel P. Berrangée154fd72019-02-11 18:24:34 +00001371 return;
Marc-André Lureau4591bd42018-07-17 14:31:45 +02001372 }
Daniel P. Berrangé16459842019-02-11 18:24:29 +00001373
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001374 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE);
Markus Armbrusterca0b64e2017-03-30 19:43:09 +02001375 /* TODO SOCKET_ADDRESS_FD where fd has AF_UNIX */
Markus Armbrusterbd269eb2017-04-26 09:36:41 +02001376 if (addr->type == SOCKET_ADDRESS_TYPE_UNIX) {
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001377 qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS);
1378 }
1379
Lukas Straubfeb774c2021-03-30 20:13:31 +02001380 /*
1381 * In the chardev-change special-case, we shouldn't register a new yank
1382 * instance, as there already may be one.
1383 */
1384 if (!chr->handover_yank_instance) {
1385 if (!yank_register_instance(CHARDEV_YANK_INSTANCE(chr->label), errp)) {
1386 return;
1387 }
Lukas Straub8ee44802020-12-28 16:08:48 +01001388 }
1389 s->registered_yank = true;
1390
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001391 /* be isn't opened until we get a connection */
1392 *be_opened = false;
1393
Marc-André Lureaubbcde962016-12-20 15:32:31 +01001394 update_disconnected_filename(s);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001395
Daniel P. Berrangéb5e18e52019-02-11 18:24:36 +00001396 if (s->is_listen) {
1397 if (qmp_chardev_open_socket_server(chr, is_telnet || is_tn3270,
1398 is_waitconnect, errp) < 0) {
1399 return;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001400 }
Marc-André Lureau5573f982018-08-17 15:52:22 +02001401 } else {
Daniel P. Berrangéb5e18e52019-02-11 18:24:36 +00001402 if (qmp_chardev_open_socket_client(chr, reconnect, errp) < 0) {
Daniel P. Berrangée154fd72019-02-11 18:24:34 +00001403 return;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001404 }
1405 }
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001406}
1407
1408static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend,
1409 Error **errp)
1410{
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001411 const char *path = qemu_opt_get(opts, "path");
1412 const char *host = qemu_opt_get(opts, "host");
1413 const char *port = qemu_opt_get(opts, "port");
Daniel P. Berrange09357002017-12-21 12:57:54 +00001414 const char *fd = qemu_opt_get(opts, "fd");
Markus Armbruster8acefc72020-11-02 10:44:22 +01001415#ifdef CONFIG_LINUX
xiaoqiang zhao776b97d2020-05-16 11:13:25 +08001416 bool tight = qemu_opt_get_bool(opts, "tight", true);
1417 bool abstract = qemu_opt_get_bool(opts, "abstract", false);
Markus Armbruster8acefc72020-11-02 10:44:22 +01001418#endif
Markus Armbrusterdfd100f2017-04-26 09:36:39 +02001419 SocketAddressLegacy *addr;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001420 ChardevSocket *sock;
1421
Marc-André Lureau1b877512021-07-25 23:59:12 +04001422 if ((!!path + !!fd + !!host) > 1) {
Daniel P. Berrange9bb40602017-12-22 13:20:40 +00001423 error_setg(errp,
Marc-André Lureau1b877512021-07-25 23:59:12 +04001424 "None or one of 'path', 'fd' or 'host' option required.");
Daniel P. Berrange9bb40602017-12-22 13:20:40 +00001425 return;
1426 }
1427
Daniel P. Berrangé16459842019-02-11 18:24:29 +00001428 if (host && !port) {
1429 error_setg(errp, "chardev: socket: no port given");
1430 return;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001431 }
1432
Daniel P. Berrangé16459842019-02-11 18:24:29 +00001433 backend->type = CHARDEV_BACKEND_KIND_SOCKET;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001434 sock = backend->u.socket.data = g_new0(ChardevSocket, 1);
1435 qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock));
1436
Paolo Bonzinia9b13152021-02-25 11:47:52 +01001437 if (qemu_opt_get(opts, "delay") && qemu_opt_get(opts, "nodelay")) {
1438 error_setg(errp, "'delay' and 'nodelay' are mutually exclusive");
1439 return;
1440 }
1441 sock->has_nodelay =
1442 qemu_opt_get(opts, "delay") ||
1443 qemu_opt_get(opts, "nodelay");
1444 sock->nodelay =
1445 !qemu_opt_get_bool(opts, "delay", true) ||
1446 qemu_opt_get_bool(opts, "nodelay", false);
1447
Daniel P. Berrangé5981c3a2019-02-11 18:24:32 +00001448 /*
1449 * We have different default to QMP for 'server', hence
1450 * we can't just check for existence of 'server'
1451 */
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001452 sock->has_server = true;
Daniel P. Berrangé5981c3a2019-02-11 18:24:32 +00001453 sock->server = qemu_opt_get_bool(opts, "server", false);
1454 sock->has_telnet = qemu_opt_get(opts, "telnet");
1455 sock->telnet = qemu_opt_get_bool(opts, "telnet", false);
1456 sock->has_tn3270 = qemu_opt_get(opts, "tn3270");
1457 sock->tn3270 = qemu_opt_get_bool(opts, "tn3270", false);
1458 sock->has_websocket = qemu_opt_get(opts, "websocket");
1459 sock->websocket = qemu_opt_get_bool(opts, "websocket", false);
Daniel P. Berrangé767abe72019-02-11 18:24:31 +00001460 /*
1461 * We have different default to QMP for 'wait' when 'server'
1462 * is set, hence we can't just check for existence of 'wait'
1463 */
Daniel P. Berrangé5981c3a2019-02-11 18:24:32 +00001464 sock->has_wait = qemu_opt_find(opts, "wait") || sock->server;
1465 sock->wait = qemu_opt_get_bool(opts, "wait", true);
Marc-André Lureau3b023752018-07-17 14:43:51 +02001466 sock->has_reconnect = qemu_opt_find(opts, "reconnect");
Daniel P. Berrangé5981c3a2019-02-11 18:24:32 +00001467 sock->reconnect = qemu_opt_get_number(opts, "reconnect", 0);
1468 sock->has_tls_creds = qemu_opt_get(opts, "tls-creds");
1469 sock->tls_creds = g_strdup(qemu_opt_get(opts, "tls-creds"));
Daniel P. Berrangefd4a5fd2019-03-08 15:21:50 +00001470 sock->has_tls_authz = qemu_opt_get(opts, "tls-authz");
1471 sock->tls_authz = g_strdup(qemu_opt_get(opts, "tls-authz"));
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001472
Markus Armbrusterdfd100f2017-04-26 09:36:39 +02001473 addr = g_new0(SocketAddressLegacy, 1);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001474 if (path) {
1475 UnixSocketAddress *q_unix;
Markus Armbruster935a8672021-09-17 16:31:19 +02001476 addr->type = SOCKET_ADDRESS_TYPE_UNIX;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001477 q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1);
1478 q_unix->path = g_strdup(path);
Markus Armbruster8acefc72020-11-02 10:44:22 +01001479#ifdef CONFIG_LINUX
Markus Armbrusterb08cc972020-11-02 10:44:18 +01001480 q_unix->has_tight = true;
xiaoqiang zhao776b97d2020-05-16 11:13:25 +08001481 q_unix->tight = tight;
Markus Armbrusterb08cc972020-11-02 10:44:18 +01001482 q_unix->has_abstract = true;
xiaoqiang zhao776b97d2020-05-16 11:13:25 +08001483 q_unix->abstract = abstract;
Markus Armbruster8acefc72020-11-02 10:44:22 +01001484#endif
Daniel P. Berrange9bb40602017-12-22 13:20:40 +00001485 } else if (host) {
Markus Armbruster935a8672021-09-17 16:31:19 +02001486 addr->type = SOCKET_ADDRESS_TYPE_INET;
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001487 addr->u.inet.data = g_new(InetSocketAddress, 1);
1488 *addr->u.inet.data = (InetSocketAddress) {
1489 .host = g_strdup(host),
1490 .port = g_strdup(port),
1491 .has_to = qemu_opt_get(opts, "to"),
1492 .to = qemu_opt_get_number(opts, "to", 0),
1493 .has_ipv4 = qemu_opt_get(opts, "ipv4"),
1494 .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0),
1495 .has_ipv6 = qemu_opt_get(opts, "ipv6"),
1496 .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0),
1497 };
Marc-André Lureau1b877512021-07-25 23:59:12 +04001498 } else {
Markus Armbruster935a8672021-09-17 16:31:19 +02001499 addr->type = SOCKET_ADDRESS_TYPE_FD;
Daniel P. Berrange09357002017-12-21 12:57:54 +00001500 addr->u.fd.data = g_new(String, 1);
1501 addr->u.fd.data->str = g_strdup(fd);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001502 }
1503 sock->addr = addr;
1504}
1505
Marc-André Lureau123676e2016-12-21 12:26:38 +01001506static void
1507char_socket_get_addr(Object *obj, Visitor *v, const char *name,
1508 void *opaque, Error **errp)
1509{
1510 SocketChardev *s = SOCKET_CHARDEV(obj);
1511
1512 visit_type_SocketAddress(v, name, &s->addr, errp);
1513}
1514
Marc-André Lureauda2d19b2016-12-21 15:43:46 +01001515static bool
1516char_socket_get_connected(Object *obj, Error **errp)
1517{
1518 SocketChardev *s = SOCKET_CHARDEV(obj);
1519
Daniel P. Berrangé32423cc2019-02-11 18:24:37 +00001520 return s->state == TCP_CHARDEV_STATE_CONNECTED;
Marc-André Lureauda2d19b2016-12-21 15:43:46 +01001521}
1522
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001523static void char_socket_class_init(ObjectClass *oc, void *data)
1524{
1525 ChardevClass *cc = CHARDEV_CLASS(oc);
1526
Lukas Straubfeb774c2021-03-30 20:13:31 +02001527 cc->supports_yank = true;
1528
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001529 cc->parse = qemu_chr_parse_socket;
1530 cc->open = qmp_chardev_open_socket;
1531 cc->chr_wait_connected = tcp_chr_wait_connected;
1532 cc->chr_write = tcp_chr_write;
1533 cc->chr_sync_read = tcp_chr_sync_read;
1534 cc->chr_disconnect = tcp_chr_disconnect;
1535 cc->get_msgfds = tcp_get_msgfds;
1536 cc->set_msgfds = tcp_set_msgfds;
1537 cc->chr_add_client = tcp_chr_add_client;
1538 cc->chr_add_watch = tcp_chr_add_watch;
1539 cc->chr_update_read_handler = tcp_chr_update_read_handler;
Marc-André Lureau123676e2016-12-21 12:26:38 +01001540
1541 object_class_property_add(oc, "addr", "SocketAddress",
1542 char_socket_get_addr, NULL,
Markus Armbrusterd2623122020-05-05 17:29:22 +02001543 NULL, NULL);
Marc-André Lureauda2d19b2016-12-21 15:43:46 +01001544
1545 object_class_property_add_bool(oc, "connected", char_socket_get_connected,
Markus Armbrusterd2623122020-05-05 17:29:22 +02001546 NULL);
Marc-André Lureaud24ca4b2016-12-12 18:41:00 +03001547}
1548
1549static const TypeInfo char_socket_type_info = {
1550 .name = TYPE_CHARDEV_SOCKET,
1551 .parent = TYPE_CHARDEV,
1552 .instance_size = sizeof(SocketChardev),
1553 .instance_finalize = char_socket_finalize,
1554 .class_init = char_socket_class_init,
1555};
1556
1557static void register_types(void)
1558{
1559 type_register_static(&char_socket_type_info);
1560}
1561
1562type_init(register_types);