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   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007-2010 Øyvind Harboe                                 *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   Copyright (C) 2008 by Spencer Oliver                                  *
   9  *   spen@spen-soft.co.uk                                                  *
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  *   This program is distributed in the hope that it will be useful,       *
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  19  *   GNU General Public License for more details.                          *
  20  *                                                                         *
  21  *   You should have received a copy of the GNU General Public License     *
  22  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  23  ***************************************************************************/
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include "config.h"
  27 #endif
  28
  29 #include "server.h"
  30 #include <helper/time_support.h>
  31 #include <target/target.h>
  32 #include <target/target_request.h>
  33 #include <target/openrisc/jsp_server.h>
  34 #include "openocd.h"
  35 #include "tcl_server.h"
  36 #include "telnet_server.h"
  37
  38 #include <signal.h>
  39
  40 #ifdef HAVE_NETDB_H
  41 #include <netdb.h>
  42 #endif
  43
  44 #ifndef _WIN32
  45 #include <netinet/tcp.h>
  46 #endif
  47
  48 static struct service *services;
  49
  50 enum shutdown_reason {
  51         CONTINUE_MAIN_LOOP,                     /* stay in main event loop */
  52         SHUTDOWN_REQUESTED,                     /* set by shutdown command; exit the event loop and quit the debugger */
  53         SHUTDOWN_WITH_ERROR_CODE,       /* set by shutdown command; quit with non-zero return code */
  54         SHUTDOWN_WITH_SIGNAL_CODE       /* set by sig_handler; exec shutdown then exit with signal as return code */
  55 };
  56 static enum shutdown_reason shutdown_openocd = CONTINUE_MAIN_LOOP;
  57
  58 /* store received signal to exit application by killing ourselves */
  59 static int last_signal;
  60
  61 /* set the polling period to 100ms */
  62 static int polling_period = 100;
  63
  64 /* address by name on which to listen for incoming TCP/IP connections */
  65 static char *bindto_name;
  66
  67 static int add_connection(struct service *service, struct command_context *cmd_ctx)
  68 {
  69         socklen_t address_size;
  70         struct connection *c, **p;
  71         int retval;
  72         int flag = 1;
  73
  74         c = malloc(sizeof(struct connection));
  75         c->fd = -1;
  76         c->fd_out = -1;
  77         memset(&c->sin, 0, sizeof(c->sin));
  78         c->cmd_ctx = copy_command_context(cmd_ctx);
  79         c->service = service;
  80         c->input_pending = false;
  81         c->priv = NULL;
  82         c->next = NULL;
  83
  84         if (service->type == CONNECTION_TCP) {
  85                 address_size = sizeof(c->sin);
  86
  87                 c->fd = accept(service->fd, (struct sockaddr *)&service->sin, &address_size);
  88                 c->fd_out = c->fd;
  89
  90                 /* This increases performance dramatically for e.g. GDB load which
  91                  * does not have a sliding window protocol.
  92                  *
  93                  * Ignore errors from this fn as it probably just means less performance
  94                  */
  95                 setsockopt(c->fd,       /* socket affected */
  96                         IPPROTO_TCP,                    /* set option at TCP level */
  97                         TCP_NODELAY,                    /* name of option */
  98                         (char *)&flag,                  /* the cast is historical cruft */
  99                         sizeof(int));                   /* length of option value */
 100
 101                 LOG_INFO("accepting '%s' connection on tcp/%s", service->name, service->port);
 102                 retval = service->new_connection(c);
 103                 if (retval != ERROR_OK) {
 104                         close_socket(c->fd);
 105                         LOG_ERROR("attempted '%s' connection rejected", service->name);
 106                         command_done(c->cmd_ctx);
 107                         free(c);
 108                         return retval;
 109                 }
 110         } else if (service->type == CONNECTION_STDINOUT) {
 111                 c->fd = service->fd;
 112                 c->fd_out = fileno(stdout);
 113
 114 #ifdef _WIN32
 115                 /* we are using stdin/out so ignore ctrl-c under windoze */
 116                 SetConsoleCtrlHandler(NULL, TRUE);
 117 #endif
 118
 119                 /* do not check for new connections again on stdin */
 120                 service->fd = -1;
 121
 122                 LOG_INFO("accepting '%s' connection from pipe", service->name);
 123                 retval = service->new_connection(c);
 124                 if (retval != ERROR_OK) {
 125                         LOG_ERROR("attempted '%s' connection rejected", service->name);
 126                         command_done(c->cmd_ctx);
 127                         free(c);
 128                         return retval;
 129                 }
 130         } else if (service->type == CONNECTION_PIPE) {
 131                 c->fd = service->fd;
 132                 /* do not check for new connections again on stdin */
 133                 service->fd = -1;
 134
 135                 char *out_file = alloc_printf("%so", service->port);
 136                 c->fd_out = open(out_file, O_WRONLY);
 137                 free(out_file);
 138                 if (c->fd_out == -1) {
 139                         LOG_ERROR("could not open %s", service->port);
 140                         command_done(c->cmd_ctx);
 141                         free(c);
 142                         return ERROR_FAIL;
 143                 }
 144
 145                 LOG_INFO("accepting '%s' connection from pipe %s", service->name, service->port);
 146                 retval = service->new_connection(c);
 147                 if (retval != ERROR_OK) {
 148                         LOG_ERROR("attempted '%s' connection rejected", service->name);
 149                         command_done(c->cmd_ctx);
 150                         free(c);
 151                         return retval;
 152                 }
 153         }
 154
 155         /* add to the end of linked list */
 156         for (p = &service->connections; *p; p = &(*p)->next)
 157                 ;
 158         *p = c;
 159
 160         if (service->max_connections != CONNECTION_LIMIT_UNLIMITED)
 161                 service->max_connections--;
 162
 163         return ERROR_OK;
 164 }
 165
 166 static int remove_connection(struct service *service, struct connection *connection)
 167 {
 168         struct connection **p = &service->connections;
 169         struct connection *c;
 170
 171         /* find connection */
 172         while ((c = *p)) {
 173                 if (c->fd == connection->fd) {
 174                         service->connection_closed(c);
 175                         if (service->type == CONNECTION_TCP)
 176                                 close_socket(c->fd);
 177                         else if (service->type == CONNECTION_PIPE) {
 178                                 /* The service will listen to the pipe again */
 179                                 c->service->fd = c->fd;
 180                         }
 181
 182                         command_done(c->cmd_ctx);
 183
 184                         /* delete connection */
 185                         *p = c->next;
 186                         free(c);
 187
 188                         if (service->max_connections != CONNECTION_LIMIT_UNLIMITED)
 189                                 service->max_connections++;
 190
 191                         break;
 192                 }
 193
 194                 /* redirect p to next list pointer */
 195                 p = &(*p)->next;
 196         }
 197
 198         return ERROR_OK;
 199 }
 200
 201 static void free_service(struct service *c)
 202 {
 203         free(c->name);
 204         free(c->port);
 205         free(c);
 206 }
 207
 208 int add_service(const struct service_driver *driver, const char *port,
 209                 int max_connections, void *priv)
 210 {
 211         struct service *c, **p;
 212         struct hostent *hp;
 213         int so_reuseaddr_option = 1;
 214
 215         c = malloc(sizeof(struct service));
 216
 217         c->name = strdup(driver->name);
 218         c->port = strdup(port);
 219         c->max_connections = 1; /* Only TCP/IP ports can support more than one connection */
 220         c->fd = -1;
 221         c->connections = NULL;
 222         c->new_connection_during_keep_alive = driver->new_connection_during_keep_alive_handler;
 223         c->new_connection = driver->new_connection_handler;
 224         c->input = driver->input_handler;
 225         c->connection_closed = driver->connection_closed_handler;
 226         c->keep_client_alive = driver->keep_client_alive_handler;
 227         c->priv = priv;
 228         c->next = NULL;
 229         long portnumber;
 230         if (strcmp(c->port, "pipe") == 0)
 231                 c->type = CONNECTION_STDINOUT;
 232         else {
 233                 char *end;
 234                 portnumber = strtol(c->port, &end, 0);
 235                 if (!*end && (parse_long(c->port, &portnumber) == ERROR_OK)) {
 236                         c->portnumber = portnumber;
 237                         c->type = CONNECTION_TCP;
 238                 } else
 239                         c->type = CONNECTION_PIPE;
 240         }
 241
 242         if (c->type == CONNECTION_TCP) {
 243                 c->max_connections = max_connections;
 244
 245                 c->fd = socket(AF_INET, SOCK_STREAM, 0);
 246                 if (c->fd == -1) {
 247                         LOG_ERROR("error creating socket: %s", strerror(errno));
 248                         free_service(c);
 249                         return ERROR_FAIL;
 250                 }
 251
 252                 setsockopt(c->fd,
 253                         SOL_SOCKET,
 254                         SO_REUSEADDR,
 255                         (void *)&so_reuseaddr_option,
 256                         sizeof(int));
 257
 258                 socket_nonblock(c->fd);
 259
 260                 memset(&c->sin, 0, sizeof(c->sin));
 261                 c->sin.sin_family = AF_INET;
 262
 263                 if (!bindto_name)
 264                         c->sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 265                 else {
 266                         hp = gethostbyname(bindto_name);
 267                         if (!hp) {
 268                                 LOG_ERROR("couldn't resolve bindto address: %s", bindto_name);
 269                                 close_socket(c->fd);
 270                                 free_service(c);
 271                                 return ERROR_FAIL;
 272                         }
 273                         memcpy(&c->sin.sin_addr, hp->h_addr_list[0], hp->h_length);
 274                 }
 275                 c->sin.sin_port = htons(c->portnumber);
 276
 277                 if (bind(c->fd, (struct sockaddr *)&c->sin, sizeof(c->sin)) == -1) {
 278                         LOG_ERROR("couldn't bind %s to socket on port %d: %s", c->name, c->portnumber, strerror(errno));
 279                         close_socket(c->fd);
 280                         free_service(c);
 281                         return ERROR_FAIL;
 282                 }
 283
 284 #ifndef _WIN32
 285                 int segsize = 65536;
 286                 setsockopt(c->fd, IPPROTO_TCP, TCP_MAXSEG,  &segsize, sizeof(int));
 287 #endif
 288                 int window_size = 128 * 1024;
 289
 290                 /* These setsockopt()s must happen before the listen() */
 291
 292                 setsockopt(c->fd, SOL_SOCKET, SO_SNDBUF,
 293                         (char *)&window_size, sizeof(window_size));
 294                 setsockopt(c->fd, SOL_SOCKET, SO_RCVBUF,
 295                         (char *)&window_size, sizeof(window_size));
 296
 297                 if (listen(c->fd, 1) == -1) {
 298                         LOG_ERROR("couldn't listen on socket: %s", strerror(errno));
 299                         close_socket(c->fd);
 300                         free_service(c);
 301                         return ERROR_FAIL;
 302                 }
 303
 304                 struct sockaddr_in addr_in;
 305                 addr_in.sin_port = 0;
 306                 socklen_t addr_in_size = sizeof(addr_in);
 307                 if (getsockname(c->fd, (struct sockaddr *)&addr_in, &addr_in_size) == 0)
 308                         LOG_INFO("Listening on port %hu for %s connections",
 309                                  ntohs(addr_in.sin_port), c->name);
 310         } else if (c->type == CONNECTION_STDINOUT) {
 311                 c->fd = fileno(stdin);
 312
 313 #ifdef _WIN32
 314                 /* for win32 set stdin/stdout to binary mode */
 315                 if (_setmode(_fileno(stdout), _O_BINARY) < 0)
 316                         LOG_WARNING("cannot change stdout mode to binary");
 317                 if (_setmode(_fileno(stdin), _O_BINARY) < 0)
 318                         LOG_WARNING("cannot change stdin mode to binary");
 319                 if (_setmode(_fileno(stderr), _O_BINARY) < 0)
 320                         LOG_WARNING("cannot change stderr mode to binary");
 321 #else
 322                 socket_nonblock(c->fd);
 323 #endif
 324         } else if (c->type == CONNECTION_PIPE) {
 325 #ifdef _WIN32
 326                 /* we currently do not support named pipes under win32
 327                  * so exit openocd for now */
 328                 LOG_ERROR("Named pipes currently not supported under this os");
 329                 free_service(c);
 330                 return ERROR_FAIL;
 331 #else
 332                 /* Pipe we're reading from */
 333                 c->fd = open(c->port, O_RDONLY | O_NONBLOCK);
 334                 if (c->fd == -1) {
 335                         LOG_ERROR("could not open %s", c->port);
 336                         free_service(c);
 337                         return ERROR_FAIL;
 338                 }
 339 #endif
 340         }
 341
 342         /* add to the end of linked list */
 343         for (p = &services; *p; p = &(*p)->next)
 344                 ;
 345         *p = c;
 346
 347         return ERROR_OK;
 348 }
 349
 350 static void remove_connections(struct service *service)
 351 {
 352         struct connection *connection;
 353
 354         connection = service->connections;
 355
 356         while (connection) {
 357                 struct connection *tmp;
 358
 359                 tmp = connection->next;
 360                 remove_connection(service, connection);
 361                 connection = tmp;
 362         }
 363 }
 364
 365 int remove_service(const char *name, const char *port)
 366 {
 367         struct service *tmp;
 368         struct service *prev;
 369
 370         prev = services;
 371
 372         for (tmp = services; tmp; prev = tmp, tmp = tmp->next) {
 373                 if (!strcmp(tmp->name, name) && !strcmp(tmp->port, port)) {
 374                         remove_connections(tmp);
 375
 376                         if (tmp == services)
 377                                 services = tmp->next;
 378                         else
 379                                 prev->next = tmp->next;
 380
 381                         if (tmp->type != CONNECTION_STDINOUT)
 382                                 close_socket(tmp->fd);
 383
 384                         free(tmp->priv);
 385                         free_service(tmp);
 386
 387                         return ERROR_OK;
 388                 }
 389         }
 390
 391         return ERROR_OK;
 392 }
 393
 394 static int remove_services(void)
 395 {
 396         struct service *c = services;
 397
 398         /* loop service */
 399         while (c) {
 400                 struct service *next = c->next;
 401
 402                 remove_connections(c);
 403
 404                 free(c->name);
 405
 406                 if (c->type == CONNECTION_PIPE) {
 407                         if (c->fd != -1)
 408                                 close(c->fd);
 409                 }
 410                 free(c->port);
 411                 free(c->priv);
 412                 /* delete service */
 413                 free(c);
 414
 415                 /* remember the last service for unlinking */
 416                 c = next;
 417         }
 418
 419         services = NULL;
 420
 421         return ERROR_OK;
 422 }
 423
 424 void server_keep_clients_alive(void)
 425 {
 426         for (struct service *s = services; s; s = s->next)
 427                 if (s->keep_client_alive)
 428                         for (struct connection *c = s->connections; c; c = c->next)
 429                                 s->keep_client_alive(c);
 430 }
 431
 432 int server_loop(struct command_context *command_context)
 433 {
 434         struct service *service;
 435
 436         bool poll_ok = true;
 437
 438         /* used in select() */
 439         fd_set read_fds;
 440         int fd_max;
 441
 442         /* used in accept() */
 443         int retval;
 444
 445         int64_t next_event = timeval_ms() + polling_period;
 446
 447 #ifndef _WIN32
 448         if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
 449                 LOG_ERROR("couldn't set SIGPIPE to SIG_IGN");
 450 #endif
 451
 452         while (shutdown_openocd == CONTINUE_MAIN_LOOP) {
 453                 /* monitor sockets for activity */
 454                 fd_max = 0;
 455                 FD_ZERO(&read_fds);
 456
 457                 /* add service and connection fds to read_fds */
 458                 for (service = services; service; service = service->next) {
 459                         if (service->fd != -1) {
 460                                 /* listen for new connections */
 461                                 FD_SET(service->fd, &read_fds);
 462
 463                                 if (service->fd > fd_max)
 464                                         fd_max = service->fd;
 465                         }
 466
 467                         if (service->connections) {
 468                                 struct connection *c;
 469
 470                                 for (c = service->connections; c; c = c->next) {
 471                                         /* check for activity on the connection */
 472                                         FD_SET(c->fd, &read_fds);
 473                                         if (c->fd > fd_max)
 474                                                 fd_max = c->fd;
 475                                 }
 476                         }
 477                 }
 478
 479                 struct timeval tv;
 480                 tv.tv_sec = 0;
 481                 if (poll_ok) {
 482                         /* we're just polling this iteration, this is faster on embedded
 483                          * hosts */
 484                         tv.tv_usec = 0;
 485                         retval = socket_select(fd_max + 1, &read_fds, NULL, NULL, &tv);
 486                 } else {
 487                         /* Every 100ms, can be changed with "poll_period" command */
 488                         int timeout_ms = next_event - timeval_ms();
 489                         if (timeout_ms < 0)
 490                                 timeout_ms = 0;
 491                         else if (timeout_ms > polling_period)
 492                                 timeout_ms = polling_period;
 493                         tv.tv_usec = timeout_ms * 1000;
 494                         /* Only while we're sleeping we'll let others run */
 495                         retval = socket_select(fd_max + 1, &read_fds, NULL, NULL, &tv);
 496                 }
 497
 498                 if (retval == -1) {
 499 #ifdef _WIN32
 500
 501                         errno = WSAGetLastError();
 502
 503                         if (errno == WSAEINTR)
 504                                 FD_ZERO(&read_fds);
 505                         else {
 506                                 LOG_ERROR("error during select: %s", strerror(errno));
 507                                 return ERROR_FAIL;
 508                         }
 509 #else
 510
 511                         if (errno == EINTR)
 512                                 FD_ZERO(&read_fds);
 513                         else {
 514                                 LOG_ERROR("error during select: %s", strerror(errno));
 515                                 return ERROR_FAIL;
 516                         }
 517 #endif
 518                 }
 519
 520                 if (retval == 0) {
 521                         /* We only execute these callbacks when there was nothing to do or we timed
 522                          *out */
 523                         target_call_timer_callbacks_now();
 524                         next_event = target_timer_next_event();
 525                         process_jim_events(command_context);
 526
 527                         FD_ZERO(&read_fds);     /* eCos leaves read_fds unchanged in this case!  */
 528
 529                         /* We timed out/there was nothing to do, timeout rather than poll next time
 530                          **/
 531                         poll_ok = false;
 532                 } else {
 533                         /* There was something to do, next time we'll just poll */
 534                         poll_ok = true;
 535                 }
 536
 537                 /* This is a simple back-off algorithm where we immediately
 538                  * re-poll if we did something this time around.
 539                  *
 540                  * This greatly improves performance of DCC.
 541                  */
 542                 poll_ok = poll_ok || target_got_message();
 543
 544                 for (service = services; service; service = service->next) {
 545                         /* handle new connections on listeners */
 546                         if ((service->fd != -1)
 547                                 && (FD_ISSET(service->fd, &read_fds))) {
 548                                 if (service->max_connections != 0)
 549                                         add_connection(service, command_context);
 550                                 else {
 551                                         if (service->type == CONNECTION_TCP) {
 552                                                 struct sockaddr_in sin;
 553                                                 socklen_t address_size = sizeof(sin);
 554                                                 int tmp_fd;
 555                                                 tmp_fd = accept(service->fd,
 556                                                                 (struct sockaddr *)&service->sin,
 557                                                                 &address_size);
 558                                                 close_socket(tmp_fd);
 559                                         }
 560                                         LOG_INFO(
 561                                                 "rejected '%s' connection, no more connections allowed",
 562                                                 service->name);
 563                                 }
 564                         }
 565
 566                         /* handle activity on connections */
 567                         if (service->connections) {
 568                                 struct connection *c;
 569
 570                                 for (c = service->connections; c; ) {
 571                                         if ((c->fd >= 0 && FD_ISSET(c->fd, &read_fds)) || c->input_pending) {
 572                                                 retval = service->input(c);
 573                                                 if (retval != ERROR_OK) {
 574                                                         struct connection *next = c->next;
 575                                                         if (service->type == CONNECTION_PIPE ||
 576                                                                         service->type == CONNECTION_STDINOUT) {
 577                                                                 /* if connection uses a pipe then
 578                                                                  * shutdown openocd on error */
 579                                                                 shutdown_openocd = SHUTDOWN_REQUESTED;
 580                                                         }
 581                                                         remove_connection(service, c);
 582                                                         LOG_INFO("dropped '%s' connection",
 583                                                                 service->name);
 584                                                         c = next;
 585                                                         continue;
 586                                                 }
 587                                         }
 588                                         c = c->next;
 589                                 }
 590                         }
 591                 }
 592
 593 #ifdef _WIN32
 594                 MSG msg;
 595                 while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
 596                         if (msg.message == WM_QUIT)
 597                                 shutdown_openocd = SHUTDOWN_WITH_SIGNAL_CODE;
 598                 }
 599 #endif
 600         }
 601
 602         /* when quit for signal or CTRL-C, run (eventually user implemented) "shutdown" */
 603         if (shutdown_openocd == SHUTDOWN_WITH_SIGNAL_CODE)
 604                 command_run_line(command_context, "shutdown");
 605
 606         return shutdown_openocd == SHUTDOWN_WITH_ERROR_CODE ? ERROR_FAIL : ERROR_OK;
 607 }
 608
 609 static void sig_handler(int sig)
 610 {
 611         /* store only first signal that hits us */
 612         if (shutdown_openocd == CONTINUE_MAIN_LOOP) {
 613                 shutdown_openocd = SHUTDOWN_WITH_SIGNAL_CODE;
 614                 last_signal = sig;
 615                 LOG_DEBUG("Terminating on Signal %d", sig);
 616         } else
 617                 LOG_DEBUG("Ignored extra Signal %d", sig);
 618 }
 619
 620
 621 #ifdef _WIN32
 622 BOOL WINAPI control_handler(DWORD ctrl_type)
 623 {
 624         shutdown_openocd = SHUTDOWN_WITH_SIGNAL_CODE;
 625         return TRUE;
 626 }
 627 #else
 628 static void sigkey_handler(int sig)
 629 {
 630         /* ignore keystroke generated signals if not in foreground process group */
 631
 632         if (tcgetpgrp(STDIN_FILENO) > 0)
 633                 sig_handler(sig);
 634         else
 635                 LOG_DEBUG("Ignored Signal %d", sig);
 636 }
 637 #endif
 638
 639
 640 int server_host_os_entry(void)
 641 {
 642         /* this currently only calls WSAStartup on native win32 systems
 643          * before any socket operations are performed.
 644          * This is an issue if you call init in your config script */
 645
 646 #ifdef _WIN32
 647         WORD version_requested;
 648         WSADATA wsadata;
 649
 650         version_requested = MAKEWORD(2, 2);
 651
 652         if (WSAStartup(version_requested, &wsadata) != 0) {
 653                 LOG_ERROR("Failed to Open Winsock");
 654                 return ERROR_FAIL;
 655         }
 656 #endif
 657         return ERROR_OK;
 658 }
 659
 660 int server_host_os_close(void)
 661 {
 662 #ifdef _WIN32
 663         WSACleanup();
 664 #endif
 665         return ERROR_OK;
 666 }
 667
 668 int server_preinit(void)
 669 {
 670 #ifdef _WIN32
 671         /* register ctrl-c handler */
 672         SetConsoleCtrlHandler(control_handler, TRUE);
 673
 674         signal(SIGBREAK, sig_handler);
 675         signal(SIGINT, sig_handler);
 676 #else
 677         signal(SIGHUP, sig_handler);
 678         signal(SIGPIPE, sig_handler);
 679         signal(SIGQUIT, sigkey_handler);
 680         signal(SIGINT, sigkey_handler);
 681 #endif
 682         signal(SIGTERM, sig_handler);
 683         signal(SIGABRT, sig_handler);
 684
 685         return ERROR_OK;
 686 }
 687
 688 int server_init(struct command_context *cmd_ctx)
 689 {
 690         int ret = tcl_init();
 691
 692         if (ret != ERROR_OK)
 693                 return ret;
 694
 695         ret = telnet_init("Open On-Chip Debugger");
 696
 697         if (ret != ERROR_OK) {
 698                 remove_services();
 699                 return ret;
 700         }
 701
 702         return ERROR_OK;
 703 }
 704
 705 int server_quit(void)
 706 {
 707         remove_services();
 708         target_quit();
 709
 710 #ifdef _WIN32
 711         SetConsoleCtrlHandler(control_handler, FALSE);
 712
 713         return ERROR_OK;
 714 #endif
 715
 716         /* return signal number so we can kill ourselves */
 717         return last_signal;
 718 }
 719
 720 void server_free(void)
 721 {
 722         tcl_service_free();
 723         telnet_service_free();
 724         jsp_service_free();
 725
 726         free(bindto_name);
 727 }
 728
 729 void exit_on_signal(int sig)
 730 {
 731 #ifndef _WIN32
 732         /* bring back default system handler and kill yourself */
 733         signal(sig, SIG_DFL);
 734         kill(getpid(), sig);
 735 #endif
 736 }
 737
 738 int connection_write(struct connection *connection, const void *data, int len)
 739 {
 740         if (len == 0) {
 741                 /* successful no-op. Sockets and pipes behave differently here... */
 742                 return 0;
 743         }
 744         if (connection->service->type == CONNECTION_TCP)
 745                 return write_socket(connection->fd_out, data, len);
 746         else
 747                 return write(connection->fd_out, data, len);
 748 }
 749
 750 int connection_read(struct connection *connection, void *data, int len)
 751 {
 752         if (connection->service->type == CONNECTION_TCP)
 753                 return read_socket(connection->fd, data, len);
 754         else
 755                 return read(connection->fd, data, len);
 756 }
 757
 758 /* tell the server we want to shut down */
 759 COMMAND_HANDLER(handle_shutdown_command)
 760 {
 761         LOG_USER("shutdown command invoked");
 762
 763         shutdown_openocd = SHUTDOWN_REQUESTED;
 764
 765         if (CMD_ARGC == 1) {
 766                 if (!strcmp(CMD_ARGV[0], "error")) {
 767                         shutdown_openocd = SHUTDOWN_WITH_ERROR_CODE;
 768                         return ERROR_FAIL;
 769                 }
 770         }
 771
 772         return ERROR_COMMAND_CLOSE_CONNECTION;
 773 }
 774
 775 COMMAND_HANDLER(handle_poll_period_command)
 776 {
 777         if (CMD_ARGC == 0)
 778                 LOG_WARNING("You need to set a period value");
 779         else
 780                 COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], polling_period);
 781
 782         LOG_INFO("set servers polling period to %ums", polling_period);
 783
 784         return ERROR_OK;
 785 }
 786
 787 COMMAND_HANDLER(handle_bindto_command)
 788 {
 789         switch (CMD_ARGC) {
 790                 case 0:
 791                         command_print(CMD, "bindto name: %s", bindto_name);
 792                         break;
 793                 case 1:
 794                         free(bindto_name);
 795                         bindto_name = strdup(CMD_ARGV[0]);
 796                         break;
 797                 default:
 798                         return ERROR_COMMAND_SYNTAX_ERROR;
 799         }
 800         return ERROR_OK;
 801 }
 802
 803 static const struct command_registration server_command_handlers[] = {
 804         {
 805                 .name = "shutdown",
 806                 .handler = &handle_shutdown_command,
 807                 .mode = COMMAND_ANY,
 808                 .usage = "",
 809                 .help = "shut the server down",
 810         },
 811         {
 812                 .name = "poll_period",
 813                 .handler = &handle_poll_period_command,
 814                 .mode = COMMAND_ANY,
 815                 .usage = "",
 816                 .help = "set the servers polling period",
 817         },
 818         {
 819                 .name = "bindto",
 820                 .handler = &handle_bindto_command,
 821                 .mode = COMMAND_CONFIG,
 822                 .usage = "[name]",
 823                 .help = "Specify address by name on which to listen for "
 824                         "incoming TCP/IP connections",
 825         },
 826         COMMAND_REGISTRATION_DONE
 827 };
 828
 829 int server_register_commands(struct command_context *cmd_ctx)
 830 {
 831         int retval = telnet_register_commands(cmd_ctx);
 832         if (retval != ERROR_OK)
 833                 return retval;
 834
 835         retval = tcl_register_commands(cmd_ctx);
 836         if (retval != ERROR_OK)
 837                 return retval;
 838
 839         retval = jsp_register_commands(cmd_ctx);
 840         if (retval != ERROR_OK)
 841                 return retval;
 842
 843         return register_commands(cmd_ctx, NULL, server_command_handlers);
 844 }
 845
 846 COMMAND_HELPER(server_port_command, unsigned short *out)
 847 {
 848         switch (CMD_ARGC) {
 849                 case 0:
 850                         command_print(CMD, "%d", *out);
 851                         break;
 852                 case 1:
 853                 {
 854                         uint16_t port;
 855                         COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], port);
 856                         *out = port;
 857                         break;
 858                 }
 859                 default:
 860                         return ERROR_COMMAND_SYNTAX_ERROR;
 861         }
 862         return ERROR_OK;
 863 }
 864
 865 COMMAND_HELPER(server_pipe_command, char **out)
 866 {
 867         switch (CMD_ARGC) {
 868                 case 0:
 869                         command_print(CMD, "%s", *out);
 870                         break;
 871                 case 1:
 872                 {
 873                         if (CMD_CTX->mode == COMMAND_EXEC) {
 874                                 LOG_WARNING("unable to change server port after init");
 875                                 return ERROR_COMMAND_ARGUMENT_INVALID;
 876                         }
 877                         free(*out);
 878                         *out = strdup(CMD_ARGV[0]);
 879                         break;
 880                 }
 881                 default:
 882                         return ERROR_COMMAND_SYNTAX_ERROR;
 883         }
 884         return ERROR_OK;
 885 }