src/server/server.c

   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(char *name,
 209         const char *port,
 210         int max_connections,
 211         new_connection_handler_t new_connection_handler,
 212         input_handler_t input_handler,
 213         connection_closed_handler_t connection_closed_handler,
 214         void *priv)
 215 {
 216         struct service *c, **p;
 217         struct hostent *hp;
 218         int so_reuseaddr_option = 1;
 219
 220         c = malloc(sizeof(struct service));
 221
 222         c->name = strdup(name);
 223         c->port = strdup(port);
 224         c->max_connections = 1; /* Only TCP/IP ports can support more than one connection */
 225         c->fd = -1;
 226         c->connections = NULL;
 227         c->new_connection = new_connection_handler;
 228         c->input = input_handler;
 229         c->connection_closed = connection_closed_handler;
 230         c->priv = priv;
 231         c->next = NULL;
 232         long portnumber;
 233         if (strcmp(c->port, "pipe") == 0)
 234                 c->type = CONNECTION_STDINOUT;
 235         else {
 236                 char *end;
 237                 portnumber = strtol(c->port, &end, 0);
 238                 if (!*end && (parse_long(c->port, &portnumber) == ERROR_OK)) {
 239                         c->portnumber = portnumber;
 240                         c->type = CONNECTION_TCP;
 241                 } else
 242                         c->type = CONNECTION_PIPE;
 243         }
 244
 245         if (c->type == CONNECTION_TCP) {
 246                 c->max_connections = max_connections;
 247
 248                 c->fd = socket(AF_INET, SOCK_STREAM, 0);
 249                 if (c->fd == -1) {
 250                         LOG_ERROR("error creating socket: %s", strerror(errno));
 251                         free_service(c);
 252                         return ERROR_FAIL;
 253                 }
 254
 255                 setsockopt(c->fd,
 256                         SOL_SOCKET,
 257                         SO_REUSEADDR,
 258                         (void *)&so_reuseaddr_option,
 259                         sizeof(int));
 260
 261                 socket_nonblock(c->fd);
 262
 263                 memset(&c->sin, 0, sizeof(c->sin));
 264                 c->sin.sin_family = AF_INET;
 265
 266                 if (!bindto_name)
 267                         c->sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 268                 else {
 269                         hp = gethostbyname(bindto_name);
 270                         if (!hp) {
 271                                 LOG_ERROR("couldn't resolve bindto address: %s", bindto_name);
 272                                 close_socket(c->fd);
 273                                 free_service(c);
 274                                 return ERROR_FAIL;
 275                         }
 276                         memcpy(&c->sin.sin_addr, hp->h_addr_list[0], hp->h_length);
 277                 }
 278                 c->sin.sin_port = htons(c->portnumber);
 279
 280                 if (bind(c->fd, (struct sockaddr *)&c->sin, sizeof(c->sin)) == -1) {
 281                         LOG_ERROR("couldn't bind %s to socket on port %d: %s", name, c->portnumber, strerror(errno));
 282                         close_socket(c->fd);
 283                         free_service(c);
 284                         return ERROR_FAIL;
 285                 }
 286
 287 #ifndef _WIN32
 288                 int segsize = 65536;
 289                 setsockopt(c->fd, IPPROTO_TCP, TCP_MAXSEG,  &segsize, sizeof(int));
 290 #endif
 291                 int window_size = 128 * 1024;
 292
 293                 /* These setsockopt()s must happen before the listen() */
 294
 295                 setsockopt(c->fd, SOL_SOCKET, SO_SNDBUF,
 296                         (char *)&window_size, sizeof(window_size));
 297                 setsockopt(c->fd, SOL_SOCKET, SO_RCVBUF,
 298                         (char *)&window_size, sizeof(window_size));
 299
 300                 if (listen(c->fd, 1) == -1) {
 301                         LOG_ERROR("couldn't listen on socket: %s", strerror(errno));
 302                         close_socket(c->fd);
 303                         free_service(c);
 304                         return ERROR_FAIL;
 305                 }
 306
 307                 struct sockaddr_in addr_in;
 308                 addr_in.sin_port = 0;
 309                 socklen_t addr_in_size = sizeof(addr_in);
 310                 if (getsockname(c->fd, (struct sockaddr *)&addr_in, &addr_in_size) == 0)
 311                         LOG_INFO("Listening on port %hu for %s connections",
 312                                  ntohs(addr_in.sin_port), name);
 313         } else if (c->type == CONNECTION_STDINOUT) {
 314                 c->fd = fileno(stdin);
 315
 316 #ifdef _WIN32
 317                 /* for win32 set stdin/stdout to binary mode */
 318                 if (_setmode(_fileno(stdout), _O_BINARY) < 0)
 319                         LOG_WARNING("cannot change stdout mode to binary");
 320                 if (_setmode(_fileno(stdin), _O_BINARY) < 0)
 321                         LOG_WARNING("cannot change stdin mode to binary");
 322                 if (_setmode(_fileno(stderr), _O_BINARY) < 0)
 323                         LOG_WARNING("cannot change stderr mode to binary");
 324 #else
 325                 socket_nonblock(c->fd);
 326 #endif
 327         } else if (c->type == CONNECTION_PIPE) {
 328 #ifdef _WIN32
 329                 /* we currently do not support named pipes under win32
 330                  * so exit openocd for now */
 331                 LOG_ERROR("Named pipes currently not supported under this os");
 332                 free_service(c);
 333                 return ERROR_FAIL;
 334 #else
 335                 /* Pipe we're reading from */
 336                 c->fd = open(c->port, O_RDONLY | O_NONBLOCK);
 337                 if (c->fd == -1) {
 338                         LOG_ERROR("could not open %s", c->port);
 339                         free_service(c);
 340                         return ERROR_FAIL;
 341                 }
 342 #endif
 343         }
 344
 345         /* add to the end of linked list */
 346         for (p = &services; *p; p = &(*p)->next)
 347                 ;
 348         *p = c;
 349
 350         return ERROR_OK;
 351 }
 352
 353 static void remove_connections(struct service *service)
 354 {
 355         struct connection *connection;
 356
 357         connection = service->connections;
 358
 359         while (connection) {
 360                 struct connection *tmp;
 361
 362                 tmp = connection->next;
 363                 remove_connection(service, connection);
 364                 connection = tmp;
 365         }
 366 }
 367
 368 int remove_service(const char *name, const char *port)
 369 {
 370         struct service *tmp;
 371         struct service *prev;
 372
 373         prev = services;
 374
 375         for (tmp = services; tmp; prev = tmp, tmp = tmp->next) {
 376                 if (!strcmp(tmp->name, name) && !strcmp(tmp->port, port)) {
 377                         remove_connections(tmp);
 378
 379                         if (tmp == services)
 380                                 services = tmp->next;
 381                         else
 382                                 prev->next = tmp->next;
 383
 384                         if (tmp->type != CONNECTION_STDINOUT)
 385                                 close_socket(tmp->fd);
 386
 387                         free(tmp->priv);
 388                         free_service(tmp);
 389
 390                         return ERROR_OK;
 391                 }
 392         }
 393
 394         return ERROR_OK;
 395 }
 396
 397 static int remove_services(void)
 398 {
 399         struct service *c = services;
 400
 401         /* loop service */
 402         while (c) {
 403                 struct service *next = c->next;
 404
 405                 remove_connections(c);
 406
 407                 free(c->name);
 408
 409                 if (c->type == CONNECTION_PIPE) {
 410                         if (c->fd != -1)
 411                                 close(c->fd);
 412                 }
 413                 free(c->port);
 414                 free(c->priv);
 415                 /* delete service */
 416                 free(c);
 417
 418                 /* remember the last service for unlinking */
 419                 c = next;
 420         }
 421
 422         services = NULL;
 423
 424         return ERROR_OK;
 425 }
 426
 427 int server_loop(struct command_context *command_context)
 428 {
 429         struct service *service;
 430
 431         bool poll_ok = true;
 432
 433         /* used in select() */
 434         fd_set read_fds;
 435         int fd_max;
 436
 437         /* used in accept() */
 438         int retval;
 439
 440         int64_t next_event = timeval_ms() + polling_period;
 441
 442 #ifndef _WIN32
 443         if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
 444                 LOG_ERROR("couldn't set SIGPIPE to SIG_IGN");
 445 #endif
 446
 447         while (shutdown_openocd == CONTINUE_MAIN_LOOP) {
 448                 /* monitor sockets for activity */
 449                 fd_max = 0;
 450                 FD_ZERO(&read_fds);
 451
 452                 /* add service and connection fds to read_fds */
 453                 for (service = services; service; service = service->next) {
 454                         if (service->fd != -1) {
 455                                 /* listen for new connections */
 456                                 FD_SET(service->fd, &read_fds);
 457
 458                                 if (service->fd > fd_max)
 459                                         fd_max = service->fd;
 460                         }
 461
 462                         if (service->connections) {
 463                                 struct connection *c;
 464
 465                                 for (c = service->connections; c; c = c->next) {
 466                                         /* check for activity on the connection */
 467                                         FD_SET(c->fd, &read_fds);
 468                                         if (c->fd > fd_max)
 469                                                 fd_max = c->fd;
 470                                 }
 471                         }
 472                 }
 473
 474                 struct timeval tv;
 475                 tv.tv_sec = 0;
 476                 if (poll_ok) {
 477                         /* we're just polling this iteration, this is faster on embedded
 478                          * hosts */
 479                         tv.tv_usec = 0;
 480                         retval = socket_select(fd_max + 1, &read_fds, NULL, NULL, &tv);
 481                 } else {
 482                         /* Every 100ms, can be changed with "poll_period" command */
 483                         int timeout_ms = next_event - timeval_ms();
 484                         if (timeout_ms < 0)
 485                                 timeout_ms = 0;
 486                         else if (timeout_ms > polling_period)
 487                                 timeout_ms = polling_period;
 488                         tv.tv_usec = timeout_ms * 1000;
 489                         /* Only while we're sleeping we'll let others run */
 490                         retval = socket_select(fd_max + 1, &read_fds, NULL, NULL, &tv);
 491                 }
 492
 493                 if (retval == -1) {
 494 #ifdef _WIN32
 495
 496                         errno = WSAGetLastError();
 497
 498                         if (errno == WSAEINTR)
 499                                 FD_ZERO(&read_fds);
 500                         else {
 501                                 LOG_ERROR("error during select: %s", strerror(errno));
 502                                 return ERROR_FAIL;
 503                         }
 504 #else
 505
 506                         if (errno == EINTR)
 507                                 FD_ZERO(&read_fds);
 508                         else {
 509                                 LOG_ERROR("error during select: %s", strerror(errno));
 510                                 return ERROR_FAIL;
 511                         }
 512 #endif
 513                 }
 514
 515                 if (retval == 0) {
 516                         /* We only execute these callbacks when there was nothing to do or we timed
 517                          *out */
 518                         target_call_timer_callbacks_now();
 519                         next_event = target_timer_next_event();
 520                         process_jim_events(command_context);
 521
 522                         FD_ZERO(&read_fds);     /* eCos leaves read_fds unchanged in this case!  */
 523
 524                         /* We timed out/there was nothing to do, timeout rather than poll next time
 525                          **/
 526                         poll_ok = false;
 527                 } else {
 528                         /* There was something to do, next time we'll just poll */
 529                         poll_ok = true;
 530                 }
 531
 532                 /* This is a simple back-off algorithm where we immediately
 533                  * re-poll if we did something this time around.
 534                  *
 535                  * This greatly improves performance of DCC.
 536                  */
 537                 poll_ok = poll_ok || target_got_message();
 538
 539                 for (service = services; service; service = service->next) {
 540                         /* handle new connections on listeners */
 541                         if ((service->fd != -1)
 542                                 && (FD_ISSET(service->fd, &read_fds))) {
 543                                 if (service->max_connections != 0)
 544                                         add_connection(service, command_context);
 545                                 else {
 546                                         if (service->type == CONNECTION_TCP) {
 547                                                 struct sockaddr_in sin;
 548                                                 socklen_t address_size = sizeof(sin);
 549                                                 int tmp_fd;
 550                                                 tmp_fd = accept(service->fd,
 551                                                                 (struct sockaddr *)&service->sin,
 552                                                                 &address_size);
 553                                                 close_socket(tmp_fd);
 554                                         }
 555                                         LOG_INFO(
 556                                                 "rejected '%s' connection, no more connections allowed",
 557                                                 service->name);
 558                                 }
 559                         }
 560
 561                         /* handle activity on connections */
 562                         if (service->connections) {
 563                                 struct connection *c;
 564
 565                                 for (c = service->connections; c; ) {
 566                                         if ((c->fd >= 0 && FD_ISSET(c->fd, &read_fds)) || c->input_pending) {
 567                                                 retval = service->input(c);
 568                                                 if (retval != ERROR_OK) {
 569                                                         struct connection *next = c->next;
 570                                                         if (service->type == CONNECTION_PIPE ||
 571                                                                         service->type == CONNECTION_STDINOUT) {
 572                                                                 /* if connection uses a pipe then
 573                                                                  * shutdown openocd on error */
 574                                                                 shutdown_openocd = SHUTDOWN_REQUESTED;
 575                                                         }
 576                                                         remove_connection(service, c);
 577                                                         LOG_INFO("dropped '%s' connection",
 578                                                                 service->name);
 579                                                         c = next;
 580                                                         continue;
 581                                                 }
 582                                         }
 583                                         c = c->next;
 584                                 }
 585                         }
 586                 }
 587
 588 #ifdef _WIN32
 589                 MSG msg;
 590                 while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
 591                         if (msg.message == WM_QUIT)
 592                                 shutdown_openocd = SHUTDOWN_WITH_SIGNAL_CODE;
 593                 }
 594 #endif
 595         }
 596
 597         /* when quit for signal or CTRL-C, run (eventually user implemented) "shutdown" */
 598         if (shutdown_openocd == SHUTDOWN_WITH_SIGNAL_CODE)
 599                 command_run_line(command_context, "shutdown");
 600
 601         return shutdown_openocd == SHUTDOWN_WITH_ERROR_CODE ? ERROR_FAIL : ERROR_OK;
 602 }
 603
 604 static void sig_handler(int sig)
 605 {
 606         /* store only first signal that hits us */
 607         if (shutdown_openocd == CONTINUE_MAIN_LOOP) {
 608                 shutdown_openocd = SHUTDOWN_WITH_SIGNAL_CODE;
 609                 last_signal = sig;
 610                 LOG_DEBUG("Terminating on Signal %d", sig);
 611         } else
 612                 LOG_DEBUG("Ignored extra Signal %d", sig);
 613 }
 614
 615
 616 #ifdef _WIN32
 617 BOOL WINAPI control_handler(DWORD ctrl_type)
 618 {
 619         shutdown_openocd = SHUTDOWN_WITH_SIGNAL_CODE;
 620         return TRUE;
 621 }
 622 #else
 623 static void sigkey_handler(int sig)
 624 {
 625         /* ignore keystroke generated signals if not in foreground process group */
 626
 627         if (tcgetpgrp(STDIN_FILENO) > 0)
 628                 sig_handler(sig);
 629         else
 630                 LOG_DEBUG("Ignored Signal %d", sig);
 631 }
 632 #endif
 633
 634
 635 int server_host_os_entry(void)
 636 {
 637         /* this currently only calls WSAStartup on native win32 systems
 638          * before any socket operations are performed.
 639          * This is an issue if you call init in your config script */
 640
 641 #ifdef _WIN32
 642         WORD version_requested;
 643         WSADATA wsadata;
 644
 645         version_requested = MAKEWORD(2, 2);
 646
 647         if (WSAStartup(version_requested, &wsadata) != 0) {
 648                 LOG_ERROR("Failed to Open Winsock");
 649                 return ERROR_FAIL;
 650         }
 651 #endif
 652         return ERROR_OK;
 653 }
 654
 655 int server_host_os_close(void)
 656 {
 657 #ifdef _WIN32
 658         WSACleanup();
 659 #endif
 660         return ERROR_OK;
 661 }
 662
 663 int server_preinit(void)
 664 {
 665 #ifdef _WIN32
 666         /* register ctrl-c handler */
 667         SetConsoleCtrlHandler(control_handler, TRUE);
 668
 669         signal(SIGBREAK, sig_handler);
 670         signal(SIGINT, sig_handler);
 671 #else
 672         signal(SIGHUP, sig_handler);
 673         signal(SIGPIPE, sig_handler);
 674         signal(SIGQUIT, sigkey_handler);
 675         signal(SIGINT, sigkey_handler);
 676 #endif
 677         signal(SIGTERM, sig_handler);
 678         signal(SIGABRT, sig_handler);
 679
 680         return ERROR_OK;
 681 }
 682
 683 int server_init(struct command_context *cmd_ctx)
 684 {
 685         int ret = tcl_init();
 686
 687         if (ret != ERROR_OK)
 688                 return ret;
 689
 690         ret = telnet_init("Open On-Chip Debugger");
 691
 692         if (ret != ERROR_OK) {
 693                 remove_services();
 694                 return ret;
 695         }
 696
 697         return ERROR_OK;
 698 }
 699
 700 int server_quit(void)
 701 {
 702         remove_services();
 703         target_quit();
 704
 705 #ifdef _WIN32
 706         SetConsoleCtrlHandler(control_handler, FALSE);
 707
 708         return ERROR_OK;
 709 #endif
 710
 711         /* return signal number so we can kill ourselves */
 712         return last_signal;
 713 }
 714
 715 void server_free(void)
 716 {
 717         tcl_service_free();
 718         telnet_service_free();
 719         jsp_service_free();
 720
 721         free(bindto_name);
 722 }
 723
 724 void exit_on_signal(int sig)
 725 {
 726 #ifndef _WIN32
 727         /* bring back default system handler and kill yourself */
 728         signal(sig, SIG_DFL);
 729         kill(getpid(), sig);
 730 #endif
 731 }
 732
 733 int connection_write(struct connection *connection, const void *data, int len)
 734 {
 735         if (len == 0) {
 736                 /* successful no-op. Sockets and pipes behave differently here... */
 737                 return 0;
 738         }
 739         if (connection->service->type == CONNECTION_TCP)
 740                 return write_socket(connection->fd_out, data, len);
 741         else
 742                 return write(connection->fd_out, data, len);
 743 }
 744
 745 int connection_read(struct connection *connection, void *data, int len)
 746 {
 747         if (connection->service->type == CONNECTION_TCP)
 748                 return read_socket(connection->fd, data, len);
 749         else
 750                 return read(connection->fd, data, len);
 751 }
 752
 753 /* tell the server we want to shut down */
 754 COMMAND_HANDLER(handle_shutdown_command)
 755 {
 756         LOG_USER("shutdown command invoked");
 757
 758         shutdown_openocd = SHUTDOWN_REQUESTED;
 759
 760         if (CMD_ARGC == 1) {
 761                 if (!strcmp(CMD_ARGV[0], "error")) {
 762                         shutdown_openocd = SHUTDOWN_WITH_ERROR_CODE;
 763                         return ERROR_FAIL;
 764                 }
 765         }
 766
 767         return ERROR_COMMAND_CLOSE_CONNECTION;
 768 }
 769
 770 COMMAND_HANDLER(handle_poll_period_command)
 771 {
 772         if (CMD_ARGC == 0)
 773                 LOG_WARNING("You need to set a period value");
 774         else
 775                 COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], polling_period);
 776
 777         LOG_INFO("set servers polling period to %ums", polling_period);
 778
 779         return ERROR_OK;
 780 }
 781
 782 COMMAND_HANDLER(handle_bindto_command)
 783 {
 784         switch (CMD_ARGC) {
 785                 case 0:
 786                         command_print(CMD, "bindto name: %s", bindto_name);
 787                         break;
 788                 case 1:
 789                         free(bindto_name);
 790                         bindto_name = strdup(CMD_ARGV[0]);
 791                         break;
 792                 default:
 793                         return ERROR_COMMAND_SYNTAX_ERROR;
 794         }
 795         return ERROR_OK;
 796 }
 797
 798 static const struct command_registration server_command_handlers[] = {
 799         {
 800                 .name = "shutdown",
 801                 .handler = &handle_shutdown_command,
 802                 .mode = COMMAND_ANY,
 803                 .usage = "",
 804                 .help = "shut the server down",
 805         },
 806         {
 807                 .name = "poll_period",
 808                 .handler = &handle_poll_period_command,
 809                 .mode = COMMAND_ANY,
 810                 .usage = "",
 811                 .help = "set the servers polling period",
 812         },
 813         {
 814                 .name = "bindto",
 815                 .handler = &handle_bindto_command,
 816                 .mode = COMMAND_CONFIG,
 817                 .usage = "[name]",
 818                 .help = "Specify address by name on which to listen for "
 819                         "incoming TCP/IP connections",
 820         },
 821         COMMAND_REGISTRATION_DONE
 822 };
 823
 824 int server_register_commands(struct command_context *cmd_ctx)
 825 {
 826         int retval = telnet_register_commands(cmd_ctx);
 827         if (retval != ERROR_OK)
 828                 return retval;
 829
 830         retval = tcl_register_commands(cmd_ctx);
 831         if (retval != ERROR_OK)
 832                 return retval;
 833
 834         retval = jsp_register_commands(cmd_ctx);
 835         if (retval != ERROR_OK)
 836                 return retval;
 837
 838         return register_commands(cmd_ctx, NULL, server_command_handlers);
 839 }
 840
 841 COMMAND_HELPER(server_port_command, unsigned short *out)
 842 {
 843         switch (CMD_ARGC) {
 844                 case 0:
 845                         command_print(CMD, "%d", *out);
 846                         break;
 847                 case 1:
 848                 {
 849                         uint16_t port;
 850                         COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], port);
 851                         *out = port;
 852                         break;
 853                 }
 854                 default:
 855                         return ERROR_COMMAND_SYNTAX_ERROR;
 856         }
 857         return ERROR_OK;
 858 }
 859
 860 COMMAND_HELPER(server_pipe_command, char **out)
 861 {
 862         switch (CMD_ARGC) {
 863                 case 0:
 864                         command_print(CMD, "%s", *out);
 865                         break;
 866                 case 1:
 867                 {
 868                         if (CMD_CTX->mode == COMMAND_EXEC) {
 869                                 LOG_WARNING("unable to change server port after init");
 870                                 return ERROR_COMMAND_ARGUMENT_INVALID;
 871                         }
 872                         free(*out);
 873                         *out = strdup(CMD_ARGV[0]);
 874                         break;
 875                 }
 876                 default:
 877                         return ERROR_COMMAND_SYNTAX_ERROR;
 878         }
 879         return ERROR_OK;
 880 }