chardev/char-socket.c

   1 /*
   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  */
  24
  25 #include "qemu/osdep.h"
  26 #include "chardev/char.h"
  27 #include "io/channel-socket.h"
  28 #include "io/channel-tls.h"
  29 #include "io/channel-websock.h"
  30 #include "io/net-listener.h"
  31 #include "qemu/error-report.h"
  32 #include "qemu/module.h"
  33 #include "qemu/option.h"
  34 #include "qapi/error.h"
  35 #include "qapi/clone-visitor.h"
  36 #include "qapi/qapi-visit-sockets.h"
  37
  38 #include "chardev/char-io.h"
  39
  40 /***********************************************************/
  41 /* TCP Net console */
  42
  43 #define TCP_MAX_FDS 16
  44
  45 typedef struct {
  46     char buf[21];
  47     size_t buflen;
  48 } TCPChardevTelnetInit;
  49
  50 typedef enum {
  51     TCP_CHARDEV_STATE_DISCONNECTED,
  52     TCP_CHARDEV_STATE_CONNECTING,
  53     TCP_CHARDEV_STATE_CONNECTED,
  54 } TCPChardevState;
  55
  56 typedef struct {
  57     Chardev parent;
  58     QIOChannel *ioc; /* Client I/O channel */
  59     QIOChannelSocket *sioc; /* Client master channel */
  60     QIONetListener *listener;
  61     GSource *hup_source;
  62     QCryptoTLSCreds *tls_creds;
  63     char *tls_authz;
  64     TCPChardevState state;
  65     int max_size;
  66     int do_telnetopt;
  67     int do_nodelay;
  68     int *read_msgfds;
  69     size_t read_msgfds_num;
  70     int *write_msgfds;
  71     size_t write_msgfds_num;
  72
  73     SocketAddress *addr;
  74     bool is_listen;
  75     bool is_telnet;
  76     bool is_tn3270;
  77     GSource *telnet_source;
  78     TCPChardevTelnetInit *telnet_init;
  79
  80     bool is_websock;
  81
  82     GSource *reconnect_timer;
  83     int64_t reconnect_time;
  84     bool connect_err_reported;
  85
  86     QIOTask *connect_task;
  87 } SocketChardev;
  88
  89 #define SOCKET_CHARDEV(obj)                                     \
  90     OBJECT_CHECK(SocketChardev, (obj), TYPE_CHARDEV_SOCKET)
  91
  92 static gboolean socket_reconnect_timeout(gpointer opaque);
  93 static void tcp_chr_telnet_init(Chardev *chr);
  94
  95 static void tcp_chr_change_state(SocketChardev *s, TCPChardevState state)
  96 {
  97     switch (state) {
  98     case TCP_CHARDEV_STATE_DISCONNECTED:
  99         break;
 100     case TCP_CHARDEV_STATE_CONNECTING:
 101         assert(s->state == TCP_CHARDEV_STATE_DISCONNECTED);
 102         break;
 103     case TCP_CHARDEV_STATE_CONNECTED:
 104         assert(s->state == TCP_CHARDEV_STATE_CONNECTING);
 105         break;
 106     }
 107     s->state = state;
 108 }
 109
 110 static void tcp_chr_reconn_timer_cancel(SocketChardev *s)
 111 {
 112     if (s->reconnect_timer) {
 113         g_source_destroy(s->reconnect_timer);
 114         g_source_unref(s->reconnect_timer);
 115         s->reconnect_timer = NULL;
 116     }
 117 }
 118
 119 static void qemu_chr_socket_restart_timer(Chardev *chr)
 120 {
 121     SocketChardev *s = SOCKET_CHARDEV(chr);
 122     char *name;
 123
 124     assert(s->state == TCP_CHARDEV_STATE_DISCONNECTED);
 125     assert(!s->reconnect_timer);
 126     name = g_strdup_printf("chardev-socket-reconnect-%s", chr->label);
 127     s->reconnect_timer = qemu_chr_timeout_add_ms(chr,
 128                                                  s->reconnect_time * 1000,
 129                                                  socket_reconnect_timeout,
 130                                                  chr);
 131     g_source_set_name(s->reconnect_timer, name);
 132     g_free(name);
 133 }
 134
 135 static void check_report_connect_error(Chardev *chr,
 136                                        Error *err)
 137 {
 138     SocketChardev *s = SOCKET_CHARDEV(chr);
 139
 140     if (!s->connect_err_reported) {
 141         error_report("Unable to connect character device %s: %s",
 142                      chr->label, error_get_pretty(err));
 143         s->connect_err_reported = true;
 144     }
 145     qemu_chr_socket_restart_timer(chr);
 146 }
 147
 148 static void tcp_chr_accept(QIONetListener *listener,
 149                            QIOChannelSocket *cioc,
 150                            void *opaque);
 151
 152 static int tcp_chr_read_poll(void *opaque);
 153 static void tcp_chr_disconnect(Chardev *chr);
 154
 155 /* Called with chr_write_lock held.  */
 156 static int tcp_chr_write(Chardev *chr, const uint8_t *buf, int len)
 157 {
 158     SocketChardev *s = SOCKET_CHARDEV(chr);
 159
 160     if (s->state == TCP_CHARDEV_STATE_CONNECTED) {
 161         int ret =  io_channel_send_full(s->ioc, buf, len,
 162                                         s->write_msgfds,
 163                                         s->write_msgfds_num);
 164
 165         /* free the written msgfds in any cases
 166          * other than ret < 0 && errno == EAGAIN
 167          */
 168         if (!(ret < 0 && EAGAIN == errno)
 169             && s->write_msgfds_num) {
 170             g_free(s->write_msgfds);
 171             s->write_msgfds = 0;
 172             s->write_msgfds_num = 0;
 173         }
 174
 175         if (ret < 0 && errno != EAGAIN) {
 176             if (tcp_chr_read_poll(chr) <= 0) {
 177                 tcp_chr_disconnect(chr);
 178                 return len;
 179             } /* else let the read handler finish it properly */
 180         }
 181
 182         return ret;
 183     } else {
 184         /* XXX: indicate an error ? */
 185         return len;
 186     }
 187 }
 188
 189 static int tcp_chr_read_poll(void *opaque)
 190 {
 191     Chardev *chr = CHARDEV(opaque);
 192     SocketChardev *s = SOCKET_CHARDEV(opaque);
 193     if (s->state != TCP_CHARDEV_STATE_CONNECTED) {
 194         return 0;
 195     }
 196     s->max_size = qemu_chr_be_can_write(chr);
 197     return s->max_size;
 198 }
 199
 200 static void tcp_chr_process_IAC_bytes(Chardev *chr,
 201                                       SocketChardev *s,
 202                                       uint8_t *buf, int *size)
 203 {
 204     /* Handle any telnet or tn3270 client's basic IAC options.
 205      * For telnet options, it satisfies char by char mode with no echo.
 206      * For tn3270 options, it satisfies binary mode with EOR.
 207      * All IAC options will be removed from the buf and the do_opt
 208      * pointer will be used to track the state of the width of the
 209      * IAC information.
 210      *
 211      * RFC854: "All TELNET commands consist of at least a two byte sequence.
 212      * The commands dealing with option negotiation are three byte sequences,
 213      * the third byte being the code for the option referenced."
 214      * "IAC BREAK", "IAC IP", "IAC NOP" and the double IAC are two bytes.
 215      * "IAC SB", "IAC SE" and "IAC EOR" are saved to split up data boundary
 216      * for tn3270.
 217      * NOP, Break and Interrupt Process(IP) might be encountered during a TN3270
 218      * session, and NOP and IP need to be done later.
 219      */
 220
 221     int i;
 222     int j = 0;
 223
 224     for (i = 0; i < *size; i++) {
 225         if (s->do_telnetopt > 1) {
 226             if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
 227                 /* Double IAC means send an IAC */
 228                 if (j != i) {
 229                     buf[j] = buf[i];
 230                 }
 231                 j++;
 232                 s->do_telnetopt = 1;
 233             } else {
 234                 if ((unsigned char)buf[i] == IAC_BREAK
 235                     && s->do_telnetopt == 2) {
 236                     /* Handle IAC break commands by sending a serial break */
 237                     qemu_chr_be_event(chr, CHR_EVENT_BREAK);
 238                     s->do_telnetopt++;
 239                 } else if (s->is_tn3270 && ((unsigned char)buf[i] == IAC_EOR
 240                            || (unsigned char)buf[i] == IAC_SB
 241                            || (unsigned char)buf[i] == IAC_SE)
 242                            && s->do_telnetopt == 2) {
 243                     buf[j++] = IAC;
 244                     buf[j++] = buf[i];
 245                     s->do_telnetopt++;
 246                 } else if (s->is_tn3270 && ((unsigned char)buf[i] == IAC_IP
 247                            || (unsigned char)buf[i] == IAC_NOP)
 248                            && s->do_telnetopt == 2) {
 249                     /* TODO: IP and NOP need to be implemented later. */
 250                     s->do_telnetopt++;
 251                 }
 252                 s->do_telnetopt++;
 253             }
 254             if (s->do_telnetopt >= 4) {
 255                 s->do_telnetopt = 1;
 256             }
 257         } else {
 258             if ((unsigned char)buf[i] == IAC) {
 259                 s->do_telnetopt = 2;
 260             } else {
 261                 if (j != i) {
 262                     buf[j] = buf[i];
 263                 }
 264                 j++;
 265             }
 266         }
 267     }
 268     *size = j;
 269 }
 270
 271 static int tcp_get_msgfds(Chardev *chr, int *fds, int num)
 272 {
 273     SocketChardev *s = SOCKET_CHARDEV(chr);
 274
 275     int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num;
 276
 277     assert(num <= TCP_MAX_FDS);
 278
 279     if (to_copy) {
 280         int i;
 281
 282         memcpy(fds, s->read_msgfds, to_copy * sizeof(int));
 283
 284         /* Close unused fds */
 285         for (i = to_copy; i < s->read_msgfds_num; i++) {
 286             close(s->read_msgfds[i]);
 287         }
 288
 289         g_free(s->read_msgfds);
 290         s->read_msgfds = 0;
 291         s->read_msgfds_num = 0;
 292     }
 293
 294     return to_copy;
 295 }
 296
 297 static int tcp_set_msgfds(Chardev *chr, int *fds, int num)
 298 {
 299     SocketChardev *s = SOCKET_CHARDEV(chr);
 300
 301     /* clear old pending fd array */
 302     g_free(s->write_msgfds);
 303     s->write_msgfds = NULL;
 304     s->write_msgfds_num = 0;
 305
 306     if ((s->state != TCP_CHARDEV_STATE_CONNECTED) ||
 307         !qio_channel_has_feature(s->ioc,
 308                                  QIO_CHANNEL_FEATURE_FD_PASS)) {
 309         return -1;
 310     }
 311
 312     if (num) {
 313         s->write_msgfds = g_new(int, num);
 314         memcpy(s->write_msgfds, fds, num * sizeof(int));
 315     }
 316
 317     s->write_msgfds_num = num;
 318
 319     return 0;
 320 }
 321
 322 static ssize_t tcp_chr_recv(Chardev *chr, char *buf, size_t len)
 323 {
 324     SocketChardev *s = SOCKET_CHARDEV(chr);
 325     struct iovec iov = { .iov_base = buf, .iov_len = len };
 326     int ret;
 327     size_t i;
 328     int *msgfds = NULL;
 329     size_t msgfds_num = 0;
 330
 331     if (qio_channel_has_feature(s->ioc, QIO_CHANNEL_FEATURE_FD_PASS)) {
 332         ret = qio_channel_readv_full(s->ioc, &iov, 1,
 333                                      &msgfds, &msgfds_num,
 334                                      NULL);
 335     } else {
 336         ret = qio_channel_readv_full(s->ioc, &iov, 1,
 337                                      NULL, NULL,
 338                                      NULL);
 339     }
 340
 341     if (ret == QIO_CHANNEL_ERR_BLOCK) {
 342         errno = EAGAIN;
 343         ret = -1;
 344     } else if (ret == -1) {
 345         errno = EIO;
 346     }
 347
 348     if (msgfds_num) {
 349         /* close and clean read_msgfds */
 350         for (i = 0; i < s->read_msgfds_num; i++) {
 351             close(s->read_msgfds[i]);
 352         }
 353
 354         if (s->read_msgfds_num) {
 355             g_free(s->read_msgfds);
 356         }
 357
 358         s->read_msgfds = msgfds;
 359         s->read_msgfds_num = msgfds_num;
 360     }
 361
 362     for (i = 0; i < s->read_msgfds_num; i++) {
 363         int fd = s->read_msgfds[i];
 364         if (fd < 0) {
 365             continue;
 366         }
 367
 368         /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
 369         qemu_set_block(fd);
 370
 371 #ifndef MSG_CMSG_CLOEXEC
 372         qemu_set_cloexec(fd);
 373 #endif
 374     }
 375
 376     return ret;
 377 }
 378
 379 static GSource *tcp_chr_add_watch(Chardev *chr, GIOCondition cond)
 380 {
 381     SocketChardev *s = SOCKET_CHARDEV(chr);
 382     return qio_channel_create_watch(s->ioc, cond);
 383 }
 384
 385 static void remove_hup_source(SocketChardev *s)
 386 {
 387     if (s->hup_source != NULL) {
 388         g_source_destroy(s->hup_source);
 389         g_source_unref(s->hup_source);
 390         s->hup_source = NULL;
 391     }
 392 }
 393
 394 static void tcp_chr_free_connection(Chardev *chr)
 395 {
 396     SocketChardev *s = SOCKET_CHARDEV(chr);
 397     int i;
 398
 399     if (s->read_msgfds_num) {
 400         for (i = 0; i < s->read_msgfds_num; i++) {
 401             close(s->read_msgfds[i]);
 402         }
 403         g_free(s->read_msgfds);
 404         s->read_msgfds = NULL;
 405         s->read_msgfds_num = 0;
 406     }
 407
 408     remove_hup_source(s);
 409
 410     tcp_set_msgfds(chr, NULL, 0);
 411     remove_fd_in_watch(chr);
 412     object_unref(OBJECT(s->sioc));
 413     s->sioc = NULL;
 414     object_unref(OBJECT(s->ioc));
 415     s->ioc = NULL;
 416     g_free(chr->filename);
 417     chr->filename = NULL;
 418     tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED);
 419 }
 420
 421 static const char *qemu_chr_socket_protocol(SocketChardev *s)
 422 {
 423     if (s->is_telnet) {
 424         return "telnet";
 425     }
 426     return s->is_websock ? "websocket" : "tcp";
 427 }
 428
 429 static char *qemu_chr_socket_address(SocketChardev *s, const char *prefix)
 430 {
 431     switch (s->addr->type) {
 432     case SOCKET_ADDRESS_TYPE_INET:
 433         return g_strdup_printf("%s%s:%s:%s%s", prefix,
 434                                qemu_chr_socket_protocol(s),
 435                                s->addr->u.inet.host,
 436                                s->addr->u.inet.port,
 437                                s->is_listen ? ",server" : "");
 438         break;
 439     case SOCKET_ADDRESS_TYPE_UNIX:
 440         return g_strdup_printf("%sunix:%s%s", prefix,
 441                                s->addr->u.q_unix.path,
 442                                s->is_listen ? ",server" : "");
 443         break;
 444     case SOCKET_ADDRESS_TYPE_FD:
 445         return g_strdup_printf("%sfd:%s%s", prefix, s->addr->u.fd.str,
 446                                s->is_listen ? ",server" : "");
 447         break;
 448     case SOCKET_ADDRESS_TYPE_VSOCK:
 449         return g_strdup_printf("%svsock:%s:%s", prefix,
 450                                s->addr->u.vsock.cid,
 451                                s->addr->u.vsock.port);
 452     default:
 453         abort();
 454     }
 455 }
 456
 457 static void update_disconnected_filename(SocketChardev *s)
 458 {
 459     Chardev *chr = CHARDEV(s);
 460
 461     g_free(chr->filename);
 462     if (s->addr) {
 463         chr->filename = qemu_chr_socket_address(s, "disconnected:");
 464     } else {
 465         chr->filename = g_strdup("disconnected:socket");
 466     }
 467 }
 468
 469 /* NB may be called even if tcp_chr_connect has not been
 470  * reached, due to TLS or telnet initialization failure,
 471  * so can *not* assume s->state == TCP_CHARDEV_STATE_CONNECTED
 472  */
 473 static void tcp_chr_disconnect(Chardev *chr)
 474 {
 475     SocketChardev *s = SOCKET_CHARDEV(chr);
 476     bool emit_close = s->state == TCP_CHARDEV_STATE_CONNECTED;
 477
 478     tcp_chr_free_connection(chr);
 479
 480     if (s->listener) {
 481         qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept,
 482                                               chr, NULL, chr->gcontext);
 483     }
 484     update_disconnected_filename(s);
 485     if (emit_close) {
 486         qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
 487     }
 488     if (s->reconnect_time) {
 489         qemu_chr_socket_restart_timer(chr);
 490     }
 491 }
 492
 493 static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
 494 {
 495     Chardev *chr = CHARDEV(opaque);
 496     SocketChardev *s = SOCKET_CHARDEV(opaque);
 497     uint8_t buf[CHR_READ_BUF_LEN];
 498     int len, size;
 499
 500     if ((s->state != TCP_CHARDEV_STATE_CONNECTED) ||
 501         s->max_size <= 0) {
 502         return TRUE;
 503     }
 504     len = sizeof(buf);
 505     if (len > s->max_size) {
 506         len = s->max_size;
 507     }
 508     size = tcp_chr_recv(chr, (void *)buf, len);
 509     if (size == 0 || (size == -1 && errno != EAGAIN)) {
 510         /* connection closed */
 511         tcp_chr_disconnect(chr);
 512     } else if (size > 0) {
 513         if (s->do_telnetopt) {
 514             tcp_chr_process_IAC_bytes(chr, s, buf, &size);
 515         }
 516         if (size > 0) {
 517             qemu_chr_be_write(chr, buf, size);
 518         }
 519     }
 520
 521     return TRUE;
 522 }
 523
 524 static gboolean tcp_chr_hup(QIOChannel *channel,
 525                                GIOCondition cond,
 526                                void *opaque)
 527 {
 528     Chardev *chr = CHARDEV(opaque);
 529     tcp_chr_disconnect(chr);
 530     return G_SOURCE_REMOVE;
 531 }
 532
 533 static int tcp_chr_sync_read(Chardev *chr, const uint8_t *buf, int len)
 534 {
 535     SocketChardev *s = SOCKET_CHARDEV(chr);
 536     int size;
 537
 538     if (s->state != TCP_CHARDEV_STATE_CONNECTED) {
 539         return 0;
 540     }
 541
 542     qio_channel_set_blocking(s->ioc, true, NULL);
 543     size = tcp_chr_recv(chr, (void *) buf, len);
 544     qio_channel_set_blocking(s->ioc, false, NULL);
 545     if (size == 0) {
 546         /* connection closed */
 547         tcp_chr_disconnect(chr);
 548     }
 549
 550     return size;
 551 }
 552
 553 static char *qemu_chr_compute_filename(SocketChardev *s)
 554 {
 555     struct sockaddr_storage *ss = &s->sioc->localAddr;
 556     struct sockaddr_storage *ps = &s->sioc->remoteAddr;
 557     socklen_t ss_len = s->sioc->localAddrLen;
 558     socklen_t ps_len = s->sioc->remoteAddrLen;
 559     char shost[NI_MAXHOST], sserv[NI_MAXSERV];
 560     char phost[NI_MAXHOST], pserv[NI_MAXSERV];
 561     const char *left = "", *right = "";
 562
 563     switch (ss->ss_family) {
 564 #ifndef _WIN32
 565     case AF_UNIX:
 566         return g_strdup_printf("unix:%s%s",
 567                                ((struct sockaddr_un *)(ss))->sun_path,
 568                                s->is_listen ? ",server" : "");
 569 #endif
 570     case AF_INET6:
 571         left  = "[";
 572         right = "]";
 573         /* fall through */
 574     case AF_INET:
 575         getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost),
 576                     sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV);
 577         getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost),
 578                     pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV);
 579         return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s",
 580                                qemu_chr_socket_protocol(s),
 581                                left, shost, right, sserv,
 582                                s->is_listen ? ",server" : "",
 583                                left, phost, right, pserv);
 584
 585     default:
 586         return g_strdup_printf("unknown");
 587     }
 588 }
 589
 590 static void update_ioc_handlers(SocketChardev *s)
 591 {
 592     Chardev *chr = CHARDEV(s);
 593
 594     if (s->state != TCP_CHARDEV_STATE_CONNECTED) {
 595         return;
 596     }
 597
 598     remove_fd_in_watch(chr);
 599     chr->gsource = io_add_watch_poll(chr, s->ioc,
 600                                      tcp_chr_read_poll,
 601                                      tcp_chr_read, chr,
 602                                      chr->gcontext);
 603
 604     remove_hup_source(s);
 605     s->hup_source = qio_channel_create_watch(s->ioc, G_IO_HUP);
 606     g_source_set_callback(s->hup_source, (GSourceFunc)tcp_chr_hup,
 607                           chr, NULL);
 608     g_source_attach(s->hup_source, chr->gcontext);
 609 }
 610
 611 static void tcp_chr_connect(void *opaque)
 612 {
 613     Chardev *chr = CHARDEV(opaque);
 614     SocketChardev *s = SOCKET_CHARDEV(opaque);
 615
 616     g_free(chr->filename);
 617     chr->filename = qemu_chr_compute_filename(s);
 618
 619     tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTED);
 620     update_ioc_handlers(s);
 621     qemu_chr_be_event(chr, CHR_EVENT_OPENED);
 622 }
 623
 624 static void tcp_chr_telnet_destroy(SocketChardev *s)
 625 {
 626     if (s->telnet_source) {
 627         g_source_destroy(s->telnet_source);
 628         g_source_unref(s->telnet_source);
 629         s->telnet_source = NULL;
 630     }
 631 }
 632
 633 static void tcp_chr_update_read_handler(Chardev *chr)
 634 {
 635     SocketChardev *s = SOCKET_CHARDEV(chr);
 636
 637     if (s->listener && s->state == TCP_CHARDEV_STATE_DISCONNECTED) {
 638         /*
 639          * It's possible that chardev context is changed in
 640          * qemu_chr_be_update_read_handlers().  Reset it for QIO net
 641          * listener if there is.
 642          */
 643         qio_net_listener_set_client_func_full(s->listener, tcp_chr_accept,
 644                                               chr, NULL, chr->gcontext);
 645     }
 646
 647     if (s->telnet_source) {
 648         tcp_chr_telnet_init(CHARDEV(s));
 649     }
 650
 651     update_ioc_handlers(s);
 652 }
 653
 654 static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc,
 655                                        GIOCondition cond G_GNUC_UNUSED,
 656                                        gpointer user_data)
 657 {
 658     SocketChardev *s = user_data;
 659     Chardev *chr = CHARDEV(s);
 660     TCPChardevTelnetInit *init = s->telnet_init;
 661     ssize_t ret;
 662
 663     assert(init);
 664
 665     ret = qio_channel_write(ioc, init->buf, init->buflen, NULL);
 666     if (ret < 0) {
 667         if (ret == QIO_CHANNEL_ERR_BLOCK) {
 668             ret = 0;
 669         } else {
 670             tcp_chr_disconnect(chr);
 671             goto end;
 672         }
 673     }
 674     init->buflen -= ret;
 675
 676     if (init->buflen == 0) {
 677         tcp_chr_connect(chr);
 678         goto end;
 679     }
 680
 681     memmove(init->buf, init->buf + ret, init->buflen);
 682
 683     return G_SOURCE_CONTINUE;
 684
 685 end:
 686     g_free(s->telnet_init);
 687     s->telnet_init = NULL;
 688     g_source_unref(s->telnet_source);
 689     s->telnet_source = NULL;
 690     return G_SOURCE_REMOVE;
 691 }
 692
 693 static void tcp_chr_telnet_init(Chardev *chr)
 694 {
 695     SocketChardev *s = SOCKET_CHARDEV(chr);
 696     TCPChardevTelnetInit *init;
 697     size_t n = 0;
 698
 699     /* Destroy existing task */
 700     tcp_chr_telnet_destroy(s);
 701
 702     if (s->telnet_init) {
 703         /* We are possibly during a handshake already */
 704         goto cont;
 705     }
 706
 707     s->telnet_init = g_new0(TCPChardevTelnetInit, 1);
 708     init = s->telnet_init;
 709
 710 #define IACSET(x, a, b, c)                      \
 711     do {                                        \
 712         x[n++] = a;                             \
 713         x[n++] = b;                             \
 714         x[n++] = c;                             \
 715     } while (0)
 716
 717     if (!s->is_tn3270) {
 718         init->buflen = 12;
 719         /* Prep the telnet negotion to put telnet in binary,
 720          * no echo, single char mode */
 721         IACSET(init->buf, 0xff, 0xfb, 0x01);  /* IAC WILL ECHO */
 722         IACSET(init->buf, 0xff, 0xfb, 0x03);  /* IAC WILL Suppress go ahead */
 723         IACSET(init->buf, 0xff, 0xfb, 0x00);  /* IAC WILL Binary */
 724         IACSET(init->buf, 0xff, 0xfd, 0x00);  /* IAC DO Binary */
 725     } else {
 726         init->buflen = 21;
 727         /* Prep the TN3270 negotion based on RFC1576 */
 728         IACSET(init->buf, 0xff, 0xfd, 0x19);  /* IAC DO EOR */
 729         IACSET(init->buf, 0xff, 0xfb, 0x19);  /* IAC WILL EOR */
 730         IACSET(init->buf, 0xff, 0xfd, 0x00);  /* IAC DO BINARY */
 731         IACSET(init->buf, 0xff, 0xfb, 0x00);  /* IAC WILL BINARY */
 732         IACSET(init->buf, 0xff, 0xfd, 0x18);  /* IAC DO TERMINAL TYPE */
 733         IACSET(init->buf, 0xff, 0xfa, 0x18);  /* IAC SB TERMINAL TYPE */
 734         IACSET(init->buf, 0x01, 0xff, 0xf0);  /* SEND IAC SE */
 735     }
 736
 737 #undef IACSET
 738
 739 cont:
 740     s->telnet_source = qio_channel_add_watch_source(s->ioc, G_IO_OUT,
 741                                                     tcp_chr_telnet_init_io,
 742                                                     s, NULL,
 743                                                     chr->gcontext);
 744 }
 745
 746
 747 static void tcp_chr_websock_handshake(QIOTask *task, gpointer user_data)
 748 {
 749     Chardev *chr = user_data;
 750     SocketChardev *s = user_data;
 751
 752     if (qio_task_propagate_error(task, NULL)) {
 753         tcp_chr_disconnect(chr);
 754     } else {
 755         if (s->do_telnetopt) {
 756             tcp_chr_telnet_init(chr);
 757         } else {
 758             tcp_chr_connect(chr);
 759         }
 760     }
 761 }
 762
 763
 764 static void tcp_chr_websock_init(Chardev *chr)
 765 {
 766     SocketChardev *s = SOCKET_CHARDEV(chr);
 767     QIOChannelWebsock *wioc = NULL;
 768     gchar *name;
 769
 770     wioc = qio_channel_websock_new_server(s->ioc);
 771
 772     name = g_strdup_printf("chardev-websocket-server-%s", chr->label);
 773     qio_channel_set_name(QIO_CHANNEL(wioc), name);
 774     g_free(name);
 775     object_unref(OBJECT(s->ioc));
 776     s->ioc = QIO_CHANNEL(wioc);
 777
 778     qio_channel_websock_handshake(wioc, tcp_chr_websock_handshake, chr, NULL);
 779 }
 780
 781
 782 static void tcp_chr_tls_handshake(QIOTask *task,
 783                                   gpointer user_data)
 784 {
 785     Chardev *chr = user_data;
 786     SocketChardev *s = user_data;
 787
 788     if (qio_task_propagate_error(task, NULL)) {
 789         tcp_chr_disconnect(chr);
 790     } else {
 791         if (s->is_websock) {
 792             tcp_chr_websock_init(chr);
 793         } else if (s->do_telnetopt) {
 794             tcp_chr_telnet_init(chr);
 795         } else {
 796             tcp_chr_connect(chr);
 797         }
 798     }
 799 }
 800
 801
 802 static void tcp_chr_tls_init(Chardev *chr)
 803 {
 804     SocketChardev *s = SOCKET_CHARDEV(chr);
 805     QIOChannelTLS *tioc;
 806     Error *err = NULL;
 807     gchar *name;
 808
 809     if (s->is_listen) {
 810         tioc = qio_channel_tls_new_server(
 811             s->ioc, s->tls_creds,
 812             s->tls_authz,
 813             &err);
 814     } else {
 815         tioc = qio_channel_tls_new_client(
 816             s->ioc, s->tls_creds,
 817             s->addr->u.inet.host,
 818             &err);
 819     }
 820     if (tioc == NULL) {
 821         error_free(err);
 822         tcp_chr_disconnect(chr);
 823         return;
 824     }
 825     name = g_strdup_printf("chardev-tls-%s-%s",
 826                            s->is_listen ? "server" : "client",
 827                            chr->label);
 828     qio_channel_set_name(QIO_CHANNEL(tioc), name);
 829     g_free(name);
 830     object_unref(OBJECT(s->ioc));
 831     s->ioc = QIO_CHANNEL(tioc);
 832
 833     qio_channel_tls_handshake(tioc,
 834                               tcp_chr_tls_handshake,
 835                               chr,
 836                               NULL,
 837                               chr->gcontext);
 838 }
 839
 840
 841 static void tcp_chr_set_client_ioc_name(Chardev *chr,
 842                                         QIOChannelSocket *sioc)
 843 {
 844     SocketChardev *s = SOCKET_CHARDEV(chr);
 845     char *name;
 846     name = g_strdup_printf("chardev-tcp-%s-%s",
 847                            s->is_listen ? "server" : "client",
 848                            chr->label);
 849     qio_channel_set_name(QIO_CHANNEL(sioc), name);
 850     g_free(name);
 851
 852 }
 853
 854 static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc)
 855 {
 856     SocketChardev *s = SOCKET_CHARDEV(chr);
 857
 858     if (s->state != TCP_CHARDEV_STATE_CONNECTING) {
 859         return -1;
 860     }
 861
 862     s->ioc = QIO_CHANNEL(sioc);
 863     object_ref(OBJECT(sioc));
 864     s->sioc = sioc;
 865     object_ref(OBJECT(sioc));
 866
 867     qio_channel_set_blocking(s->ioc, false, NULL);
 868
 869     if (s->do_nodelay) {
 870         qio_channel_set_delay(s->ioc, false);
 871     }
 872     if (s->listener) {
 873         qio_net_listener_set_client_func_full(s->listener, NULL, NULL,
 874                                               NULL, chr->gcontext);
 875     }
 876
 877     if (s->tls_creds) {
 878         tcp_chr_tls_init(chr);
 879     } else if (s->is_websock) {
 880         tcp_chr_websock_init(chr);
 881     } else if (s->do_telnetopt) {
 882         tcp_chr_telnet_init(chr);
 883     } else {
 884         tcp_chr_connect(chr);
 885     }
 886
 887     return 0;
 888 }
 889
 890
 891 static int tcp_chr_add_client(Chardev *chr, int fd)
 892 {
 893     int ret;
 894     QIOChannelSocket *sioc;
 895     SocketChardev *s = SOCKET_CHARDEV(chr);
 896
 897     if (s->state != TCP_CHARDEV_STATE_DISCONNECTED) {
 898         return -1;
 899     }
 900
 901     sioc = qio_channel_socket_new_fd(fd, NULL);
 902     if (!sioc) {
 903         return -1;
 904     }
 905     tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
 906     tcp_chr_set_client_ioc_name(chr, sioc);
 907     ret = tcp_chr_new_client(chr, sioc);
 908     object_unref(OBJECT(sioc));
 909     return ret;
 910 }
 911
 912 static void tcp_chr_accept(QIONetListener *listener,
 913                            QIOChannelSocket *cioc,
 914                            void *opaque)
 915 {
 916     Chardev *chr = CHARDEV(opaque);
 917     SocketChardev *s = SOCKET_CHARDEV(chr);
 918
 919     tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
 920     tcp_chr_set_client_ioc_name(chr, cioc);
 921     tcp_chr_new_client(chr, cioc);
 922 }
 923
 924
 925 static int tcp_chr_connect_client_sync(Chardev *chr, Error **errp)
 926 {
 927     SocketChardev *s = SOCKET_CHARDEV(chr);
 928     QIOChannelSocket *sioc = qio_channel_socket_new();
 929     tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
 930     tcp_chr_set_client_ioc_name(chr, sioc);
 931     if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) {
 932         tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED);
 933         object_unref(OBJECT(sioc));
 934         return -1;
 935     }
 936     tcp_chr_new_client(chr, sioc);
 937     object_unref(OBJECT(sioc));
 938     return 0;
 939 }
 940
 941
 942 static void tcp_chr_accept_server_sync(Chardev *chr)
 943 {
 944     SocketChardev *s = SOCKET_CHARDEV(chr);
 945     QIOChannelSocket *sioc;
 946     info_report("QEMU waiting for connection on: %s",
 947                 chr->filename);
 948     tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
 949     sioc = qio_net_listener_wait_client(s->listener);
 950     tcp_chr_set_client_ioc_name(chr, sioc);
 951     tcp_chr_new_client(chr, sioc);
 952     object_unref(OBJECT(sioc));
 953 }
 954
 955
 956 static int tcp_chr_wait_connected(Chardev *chr, Error **errp)
 957 {
 958     SocketChardev *s = SOCKET_CHARDEV(chr);
 959     const char *opts[] = { "telnet", "tn3270", "websock", "tls-creds" };
 960     bool optset[] = { s->is_telnet, s->is_tn3270, s->is_websock, s->tls_creds };
 961     size_t i;
 962
 963     QEMU_BUILD_BUG_ON(G_N_ELEMENTS(opts) != G_N_ELEMENTS(optset));
 964     for (i = 0; i < G_N_ELEMENTS(opts); i++) {
 965         if (optset[i]) {
 966             error_setg(errp,
 967                        "'%s' option is incompatible with waiting for "
 968                        "connection completion", opts[i]);
 969             return -1;
 970         }
 971     }
 972
 973     tcp_chr_reconn_timer_cancel(s);
 974
 975     /*
 976      * We expect states to be as follows:
 977      *
 978      *  - server
 979      *    - wait   -> CONNECTED
 980      *    - nowait -> DISCONNECTED
 981      *  - client
 982      *    - reconnect == 0 -> CONNECTED
 983      *    - reconnect != 0 -> CONNECTING
 984      *
 985      */
 986     if (s->state == TCP_CHARDEV_STATE_CONNECTING) {
 987         if (!s->connect_task) {
 988             error_setg(errp,
 989                        "Unexpected 'connecting' state without connect task "
 990                        "while waiting for connection completion");
 991             return -1;
 992         }
 993         /*
 994          * tcp_chr_wait_connected should only ever be run from the
 995          * main loop thread associated with chr->gcontext, otherwise
 996          * qio_task_wait_thread has a dangerous race condition with
 997          * free'ing of the s->connect_task object.
 998          *
 999          * Acquiring the main context doesn't 100% prove we're in
1000          * the main loop thread, but it does at least guarantee
1001          * that the main loop won't be executed by another thread
1002          * avoiding the race condition with the task idle callback.
1003          */
1004         g_main_context_acquire(chr->gcontext);
1005         qio_task_wait_thread(s->connect_task);
1006         g_main_context_release(chr->gcontext);
1007
1008         /*
1009          * The completion callback (qemu_chr_socket_connected) for
1010          * s->connect_task should have set this to NULL by the time
1011          * qio_task_wait_thread has returned.
1012          */
1013         assert(!s->connect_task);
1014
1015         /*
1016          * NB we are *not* guaranteed to have "s->state == ..CONNECTED"
1017          * at this point as this first connect may be failed, so
1018          * allow the next loop to run regardless.
1019          */
1020     }
1021
1022     while (s->state != TCP_CHARDEV_STATE_CONNECTED) {
1023         if (s->is_listen) {
1024             tcp_chr_accept_server_sync(chr);
1025         } else {
1026             Error *err = NULL;
1027             if (tcp_chr_connect_client_sync(chr, &err) < 0) {
1028                 if (s->reconnect_time) {
1029                     error_free(err);
1030                     g_usleep(s->reconnect_time * 1000ULL * 1000ULL);
1031                 } else {
1032                     error_propagate(errp, err);
1033                     return -1;
1034                 }
1035             }
1036         }
1037     }
1038
1039     return 0;
1040 }
1041
1042 static void char_socket_finalize(Object *obj)
1043 {
1044     Chardev *chr = CHARDEV(obj);
1045     SocketChardev *s = SOCKET_CHARDEV(obj);
1046
1047     tcp_chr_free_connection(chr);
1048     tcp_chr_reconn_timer_cancel(s);
1049     qapi_free_SocketAddress(s->addr);
1050     tcp_chr_telnet_destroy(s);
1051     g_free(s->telnet_init);
1052     if (s->listener) {
1053         qio_net_listener_set_client_func_full(s->listener, NULL, NULL,
1054                                               NULL, chr->gcontext);
1055         object_unref(OBJECT(s->listener));
1056     }
1057     if (s->tls_creds) {
1058         object_unref(OBJECT(s->tls_creds));
1059     }
1060     g_free(s->tls_authz);
1061
1062     qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1063 }
1064
1065 static void qemu_chr_socket_connected(QIOTask *task, void *opaque)
1066 {
1067     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task));
1068     Chardev *chr = CHARDEV(opaque);
1069     SocketChardev *s = SOCKET_CHARDEV(chr);
1070     Error *err = NULL;
1071
1072     s->connect_task = NULL;
1073
1074     if (qio_task_propagate_error(task, &err)) {
1075         tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED);
1076         check_report_connect_error(chr, err);
1077         error_free(err);
1078         goto cleanup;
1079     }
1080
1081     s->connect_err_reported = false;
1082     tcp_chr_new_client(chr, sioc);
1083
1084 cleanup:
1085     object_unref(OBJECT(sioc));
1086 }
1087
1088
1089 static void tcp_chr_connect_client_task(QIOTask *task,
1090                                         gpointer opaque)
1091 {
1092     QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task));
1093     SocketAddress *addr = opaque;
1094     Error *err = NULL;
1095
1096     qio_channel_socket_connect_sync(ioc, addr, &err);
1097
1098     qio_task_set_error(task, err);
1099 }
1100
1101
1102 static void tcp_chr_connect_client_async(Chardev *chr)
1103 {
1104     SocketChardev *s = SOCKET_CHARDEV(chr);
1105     QIOChannelSocket *sioc;
1106
1107     tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
1108     sioc = qio_channel_socket_new();
1109     tcp_chr_set_client_ioc_name(chr, sioc);
1110     /*
1111      * Normally code would use the qio_channel_socket_connect_async
1112      * method which uses a QIOTask + qio_task_set_error internally
1113      * to avoid blocking. The tcp_chr_wait_connected method, however,
1114      * needs a way to synchronize with completion of the background
1115      * connect task which can't be done with the QIOChannelSocket
1116      * async APIs. Thus we must use QIOTask directly to implement
1117      * the non-blocking concept locally.
1118      */
1119     s->connect_task = qio_task_new(OBJECT(sioc),
1120                                    qemu_chr_socket_connected,
1121                                    chr, NULL);
1122     qio_task_run_in_thread(s->connect_task,
1123                            tcp_chr_connect_client_task,
1124                            s->addr,
1125                            NULL,
1126                            chr->gcontext);
1127 }
1128
1129 static gboolean socket_reconnect_timeout(gpointer opaque)
1130 {
1131     Chardev *chr = CHARDEV(opaque);
1132     SocketChardev *s = SOCKET_CHARDEV(opaque);
1133
1134     g_source_unref(s->reconnect_timer);
1135     s->reconnect_timer = NULL;
1136
1137     if (chr->be_open) {
1138         return false;
1139     }
1140
1141     tcp_chr_connect_client_async(chr);
1142
1143     return false;
1144 }
1145
1146
1147 static int qmp_chardev_open_socket_server(Chardev *chr,
1148                                           bool is_telnet,
1149                                           bool is_waitconnect,
1150                                           Error **errp)
1151 {
1152     SocketChardev *s = SOCKET_CHARDEV(chr);
1153     char *name;
1154     if (is_telnet) {
1155         s->do_telnetopt = 1;
1156     }
1157     s->listener = qio_net_listener_new();
1158
1159     name = g_strdup_printf("chardev-tcp-listener-%s", chr->label);
1160     qio_net_listener_set_name(s->listener, name);
1161     g_free(name);
1162
1163     if (qio_net_listener_open_sync(s->listener, s->addr, errp) < 0) {
1164         object_unref(OBJECT(s->listener));
1165         s->listener = NULL;
1166         return -1;
1167     }
1168
1169     qapi_free_SocketAddress(s->addr);
1170     s->addr = socket_local_address(s->listener->sioc[0]->fd, errp);
1171     update_disconnected_filename(s);
1172
1173     if (is_waitconnect) {
1174         tcp_chr_accept_server_sync(chr);
1175     } else {
1176         qio_net_listener_set_client_func_full(s->listener,
1177                                               tcp_chr_accept,
1178                                               chr, NULL,
1179                                               chr->gcontext);
1180     }
1181
1182     return 0;
1183 }
1184
1185
1186 static int qmp_chardev_open_socket_client(Chardev *chr,
1187                                           int64_t reconnect,
1188                                           Error **errp)
1189 {
1190     SocketChardev *s = SOCKET_CHARDEV(chr);
1191
1192     if (reconnect > 0) {
1193         s->reconnect_time = reconnect;
1194         tcp_chr_connect_client_async(chr);
1195         return 0;
1196     } else {
1197         return tcp_chr_connect_client_sync(chr, errp);
1198     }
1199 }
1200
1201
1202 static bool qmp_chardev_validate_socket(ChardevSocket *sock,
1203                                         SocketAddress *addr,
1204                                         Error **errp)
1205 {
1206     /* Validate any options which have a dependency on address type */
1207     switch (addr->type) {
1208     case SOCKET_ADDRESS_TYPE_FD:
1209         if (sock->has_reconnect) {
1210             error_setg(errp,
1211                        "'reconnect' option is incompatible with "
1212                        "'fd' address type");
1213             return false;
1214         }
1215         if (sock->has_tls_creds &&
1216             !(sock->has_server && sock->server)) {
1217             error_setg(errp,
1218                        "'tls_creds' option is incompatible with "
1219                        "'fd' address type as client");
1220             return false;
1221         }
1222         break;
1223
1224     case SOCKET_ADDRESS_TYPE_UNIX:
1225         if (sock->has_tls_creds) {
1226             error_setg(errp,
1227                        "'tls_creds' option is incompatible with "
1228                        "'unix' address type");
1229             return false;
1230         }
1231         break;
1232
1233     case SOCKET_ADDRESS_TYPE_INET:
1234         break;
1235
1236     case SOCKET_ADDRESS_TYPE_VSOCK:
1237         if (sock->has_tls_creds) {
1238             error_setg(errp,
1239                        "'tls_creds' option is incompatible with "
1240                        "'vsock' address type");
1241             return false;
1242         }
1243
1244     default:
1245         break;
1246     }
1247
1248     if (sock->has_tls_authz && !sock->has_tls_creds) {
1249         error_setg(errp, "'tls_authz' option requires 'tls_creds' option");
1250         return false;
1251     }
1252
1253     /* Validate any options which have a dependancy on client vs server */
1254     if (!sock->has_server || sock->server) {
1255         if (sock->has_reconnect) {
1256             error_setg(errp,
1257                        "'reconnect' option is incompatible with "
1258                        "socket in server listen mode");
1259             return false;
1260         }
1261     } else {
1262         if (sock->has_websocket && sock->websocket) {
1263             error_setg(errp, "%s", "Websocket client is not implemented");
1264             return false;
1265         }
1266         if (sock->has_wait) {
1267             warn_report("'wait' option is deprecated with "
1268                         "socket in client connect mode");
1269             if (sock->wait) {
1270                 error_setg(errp, "%s",
1271                            "'wait' option is incompatible with "
1272                            "socket in client connect mode");
1273                 return false;
1274             }
1275         }
1276     }
1277
1278     return true;
1279 }
1280
1281
1282 static void qmp_chardev_open_socket(Chardev *chr,
1283                                     ChardevBackend *backend,
1284                                     bool *be_opened,
1285                                     Error **errp)
1286 {
1287     SocketChardev *s = SOCKET_CHARDEV(chr);
1288     ChardevSocket *sock = backend->u.socket.data;
1289     bool do_nodelay     = sock->has_nodelay ? sock->nodelay : false;
1290     bool is_listen      = sock->has_server  ? sock->server  : true;
1291     bool is_telnet      = sock->has_telnet  ? sock->telnet  : false;
1292     bool is_tn3270      = sock->has_tn3270  ? sock->tn3270  : false;
1293     bool is_waitconnect = sock->has_wait    ? sock->wait    : false;
1294     bool is_websock     = sock->has_websocket ? sock->websocket : false;
1295     int64_t reconnect   = sock->has_reconnect ? sock->reconnect : 0;
1296     SocketAddress *addr;
1297
1298     s->is_listen = is_listen;
1299     s->is_telnet = is_telnet;
1300     s->is_tn3270 = is_tn3270;
1301     s->is_websock = is_websock;
1302     s->do_nodelay = do_nodelay;
1303     if (sock->tls_creds) {
1304         Object *creds;
1305         creds = object_resolve_path_component(
1306             object_get_objects_root(), sock->tls_creds);
1307         if (!creds) {
1308             error_setg(errp, "No TLS credentials with id '%s'",
1309                        sock->tls_creds);
1310             return;
1311         }
1312         s->tls_creds = (QCryptoTLSCreds *)
1313             object_dynamic_cast(creds,
1314                                 TYPE_QCRYPTO_TLS_CREDS);
1315         if (!s->tls_creds) {
1316             error_setg(errp, "Object with id '%s' is not TLS credentials",
1317                        sock->tls_creds);
1318             return;
1319         }
1320         object_ref(OBJECT(s->tls_creds));
1321         if (is_listen) {
1322             if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) {
1323                 error_setg(errp, "%s",
1324                            "Expected TLS credentials for server endpoint");
1325                 return;
1326             }
1327         } else {
1328             if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) {
1329                 error_setg(errp, "%s",
1330                            "Expected TLS credentials for client endpoint");
1331                 return;
1332             }
1333         }
1334     }
1335     s->tls_authz = g_strdup(sock->tls_authz);
1336
1337     s->addr = addr = socket_address_flatten(sock->addr);
1338
1339     if (!qmp_chardev_validate_socket(sock, addr, errp)) {
1340         return;
1341     }
1342
1343     qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE);
1344     /* TODO SOCKET_ADDRESS_FD where fd has AF_UNIX */
1345     if (addr->type == SOCKET_ADDRESS_TYPE_UNIX) {
1346         qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS);
1347     }
1348
1349     /* be isn't opened until we get a connection */
1350     *be_opened = false;
1351
1352     update_disconnected_filename(s);
1353
1354     if (s->is_listen) {
1355         if (qmp_chardev_open_socket_server(chr, is_telnet || is_tn3270,
1356                                            is_waitconnect, errp) < 0) {
1357             return;
1358         }
1359     } else {
1360         if (qmp_chardev_open_socket_client(chr, reconnect, errp) < 0) {
1361             return;
1362         }
1363     }
1364 }
1365
1366 static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend,
1367                                   Error **errp)
1368 {
1369     const char *path = qemu_opt_get(opts, "path");
1370     const char *host = qemu_opt_get(opts, "host");
1371     const char *port = qemu_opt_get(opts, "port");
1372     const char *fd = qemu_opt_get(opts, "fd");
1373     SocketAddressLegacy *addr;
1374     ChardevSocket *sock;
1375
1376     if ((!!path + !!fd + !!host) != 1) {
1377         error_setg(errp,
1378                    "Exactly one of 'path', 'fd' or 'host' required");
1379         return;
1380     }
1381
1382     if (host && !port) {
1383         error_setg(errp, "chardev: socket: no port given");
1384         return;
1385     }
1386
1387     backend->type = CHARDEV_BACKEND_KIND_SOCKET;
1388     sock = backend->u.socket.data = g_new0(ChardevSocket, 1);
1389     qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock));
1390
1391     sock->has_nodelay = qemu_opt_get(opts, "delay");
1392     sock->nodelay = !qemu_opt_get_bool(opts, "delay", true);
1393     /*
1394      * We have different default to QMP for 'server', hence
1395      * we can't just check for existence of 'server'
1396      */
1397     sock->has_server = true;
1398     sock->server = qemu_opt_get_bool(opts, "server", false);
1399     sock->has_telnet = qemu_opt_get(opts, "telnet");
1400     sock->telnet = qemu_opt_get_bool(opts, "telnet", false);
1401     sock->has_tn3270 = qemu_opt_get(opts, "tn3270");
1402     sock->tn3270 = qemu_opt_get_bool(opts, "tn3270", false);
1403     sock->has_websocket = qemu_opt_get(opts, "websocket");
1404     sock->websocket = qemu_opt_get_bool(opts, "websocket", false);
1405     /*
1406      * We have different default to QMP for 'wait' when 'server'
1407      * is set, hence we can't just check for existence of 'wait'
1408      */
1409     sock->has_wait = qemu_opt_find(opts, "wait") || sock->server;
1410     sock->wait = qemu_opt_get_bool(opts, "wait", true);
1411     sock->has_reconnect = qemu_opt_find(opts, "reconnect");
1412     sock->reconnect = qemu_opt_get_number(opts, "reconnect", 0);
1413     sock->has_tls_creds = qemu_opt_get(opts, "tls-creds");
1414     sock->tls_creds = g_strdup(qemu_opt_get(opts, "tls-creds"));
1415     sock->has_tls_authz = qemu_opt_get(opts, "tls-authz");
1416     sock->tls_authz = g_strdup(qemu_opt_get(opts, "tls-authz"));
1417
1418     addr = g_new0(SocketAddressLegacy, 1);
1419     if (path) {
1420         UnixSocketAddress *q_unix;
1421         addr->type = SOCKET_ADDRESS_LEGACY_KIND_UNIX;
1422         q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1);
1423         q_unix->path = g_strdup(path);
1424     } else if (host) {
1425         addr->type = SOCKET_ADDRESS_LEGACY_KIND_INET;
1426         addr->u.inet.data = g_new(InetSocketAddress, 1);
1427         *addr->u.inet.data = (InetSocketAddress) {
1428             .host = g_strdup(host),
1429             .port = g_strdup(port),
1430             .has_to = qemu_opt_get(opts, "to"),
1431             .to = qemu_opt_get_number(opts, "to", 0),
1432             .has_ipv4 = qemu_opt_get(opts, "ipv4"),
1433             .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0),
1434             .has_ipv6 = qemu_opt_get(opts, "ipv6"),
1435             .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0),
1436         };
1437     } else if (fd) {
1438         addr->type = SOCKET_ADDRESS_LEGACY_KIND_FD;
1439         addr->u.fd.data = g_new(String, 1);
1440         addr->u.fd.data->str = g_strdup(fd);
1441     } else {
1442         g_assert_not_reached();
1443     }
1444     sock->addr = addr;
1445 }
1446
1447 static void
1448 char_socket_get_addr(Object *obj, Visitor *v, const char *name,
1449                      void *opaque, Error **errp)
1450 {
1451     SocketChardev *s = SOCKET_CHARDEV(obj);
1452
1453     visit_type_SocketAddress(v, name, &s->addr, errp);
1454 }
1455
1456 static bool
1457 char_socket_get_connected(Object *obj, Error **errp)
1458 {
1459     SocketChardev *s = SOCKET_CHARDEV(obj);
1460
1461     return s->state == TCP_CHARDEV_STATE_CONNECTED;
1462 }
1463
1464 static void char_socket_class_init(ObjectClass *oc, void *data)
1465 {
1466     ChardevClass *cc = CHARDEV_CLASS(oc);
1467
1468     cc->parse = qemu_chr_parse_socket;
1469     cc->open = qmp_chardev_open_socket;
1470     cc->chr_wait_connected = tcp_chr_wait_connected;
1471     cc->chr_write = tcp_chr_write;
1472     cc->chr_sync_read = tcp_chr_sync_read;
1473     cc->chr_disconnect = tcp_chr_disconnect;
1474     cc->get_msgfds = tcp_get_msgfds;
1475     cc->set_msgfds = tcp_set_msgfds;
1476     cc->chr_add_client = tcp_chr_add_client;
1477     cc->chr_add_watch = tcp_chr_add_watch;
1478     cc->chr_update_read_handler = tcp_chr_update_read_handler;
1479
1480     object_class_property_add(oc, "addr", "SocketAddress",
1481                               char_socket_get_addr, NULL,
1482                               NULL, NULL, &error_abort);
1483
1484     object_class_property_add_bool(oc, "connected", char_socket_get_connected,
1485                                    NULL, &error_abort);
1486 }
1487
1488 static const TypeInfo char_socket_type_info = {
1489     .name = TYPE_CHARDEV_SOCKET,
1490     .parent = TYPE_CHARDEV,
1491     .instance_size = sizeof(SocketChardev),
1492     .instance_finalize = char_socket_finalize,
1493     .class_init = char_socket_class_init,
1494 };
1495
1496 static void register_types(void)
1497 {
1498     type_register_static(&char_socket_type_info);
1499 }
1500
1501 type_init(register_types);