src/server/server.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 /***************************************************************************
   4  *   Copyright (C) 2005 by Dominic Rath                                    *
   5  *   Dominic.Rath@gmx.de                                                   *
   6  *                                                                         *
   7  *   Copyright (C) 2007-2010 Øyvind Harboe                                 *
   8  *   oyvind.harboe@zylin.com                                               *
   9  *                                                                         *
  10  *   Copyright (C) 2008 by Spencer Oliver                                  *
  11  *   spen@spen-soft.co.uk                                                  *
  12  ***************************************************************************/
  13
  14 #ifdef HAVE_CONFIG_H
  15 #include "config.h"
  16 #endif
  17
  18 #include "server.h"
  19 #include <helper/time_support.h>
  20 #include <target/target.h>
  21 #include <target/target_request.h>
  22 #include <target/openrisc/jsp_server.h>
  23 #include "openocd.h"
  24 #include "tcl_server.h"
  25 #include "telnet_server.h"
  26
  27 #include <signal.h>
  28
  29 #ifdef HAVE_NETDB_H
  30 #include <netdb.h>
  31 #endif
  32
  33 #ifndef _WIN32
  34 #include <netinet/tcp.h>
  35 #endif
  36
  37 static struct service *services;
  38
  39 enum shutdown_reason {
  40         CONTINUE_MAIN_LOOP,                     /* stay in main event loop */
  41         SHUTDOWN_REQUESTED,                     /* set by shutdown command; exit the event loop and quit the debugger */
  42         SHUTDOWN_WITH_ERROR_CODE,       /* set by shutdown command; quit with non-zero return code */
  43         SHUTDOWN_WITH_SIGNAL_CODE       /* set by sig_handler; exec shutdown then exit with signal as return code */
  44 };
  45 static enum shutdown_reason shutdown_openocd = CONTINUE_MAIN_LOOP;
  46
  47 /* store received signal to exit application by killing ourselves */
  48 static int last_signal;
  49
  50 /* set the polling period to 100ms */
  51 static int polling_period = 100;
  52
  53 /* address by name on which to listen for incoming TCP/IP connections */
  54 static char *bindto_name;
  55
  56 static int add_connection(struct service *service, struct command_context *cmd_ctx)
  57 {
  58         socklen_t address_size;
  59         struct connection *c, **p;
  60         int retval;
  61         int flag = 1;
  62
  63         c = malloc(sizeof(struct connection));
  64         c->fd = -1;
  65         c->fd_out = -1;
  66         memset(&c->sin, 0, sizeof(c->sin));
  67         c->cmd_ctx = copy_command_context(cmd_ctx);
  68         c->service = service;
  69         c->input_pending = false;
  70         c->priv = NULL;
  71         c->next = NULL;
  72
  73         if (service->type == CONNECTION_TCP) {
  74                 address_size = sizeof(c->sin);
  75
  76                 c->fd = accept(service->fd, (struct sockaddr *)&service->sin, &address_size);
  77                 c->fd_out = c->fd;
  78
  79                 /* This increases performance dramatically for e.g. GDB load which
  80                  * does not have a sliding window protocol.
  81                  *
  82                  * Ignore errors from this fn as it probably just means less performance
  83                  */
  84                 setsockopt(c->fd,       /* socket affected */
  85                         IPPROTO_TCP,                    /* set option at TCP level */
  86                         TCP_NODELAY,                    /* name of option */
  87                         (char *)&flag,                  /* the cast is historical cruft */
  88                         sizeof(int));                   /* length of option value */
  89
  90                 LOG_INFO("accepting '%s' connection on tcp/%s", service->name, service->port);
  91                 retval = service->new_connection(c);
  92                 if (retval != ERROR_OK) {
  93                         close_socket(c->fd);
  94                         LOG_ERROR("attempted '%s' connection rejected", service->name);
  95                         command_done(c->cmd_ctx);
  96                         free(c);
  97                         return retval;
  98                 }
  99         } else if (service->type == CONNECTION_STDINOUT) {
 100                 c->fd = service->fd;
 101                 c->fd_out = fileno(stdout);
 102
 103 #ifdef _WIN32
 104                 /* we are using stdin/out so ignore ctrl-c under windoze */
 105                 SetConsoleCtrlHandler(NULL, TRUE);
 106 #endif
 107
 108                 /* do not check for new connections again on stdin */
 109                 service->fd = -1;
 110
 111                 LOG_INFO("accepting '%s' connection from pipe", service->name);
 112                 retval = service->new_connection(c);
 113                 if (retval != ERROR_OK) {
 114                         LOG_ERROR("attempted '%s' connection rejected", service->name);
 115                         command_done(c->cmd_ctx);
 116                         free(c);
 117                         return retval;
 118                 }
 119         } else if (service->type == CONNECTION_PIPE) {
 120                 c->fd = service->fd;
 121                 /* do not check for new connections again on stdin */
 122                 service->fd = -1;
 123
 124                 char *out_file = alloc_printf("%so", service->port);
 125                 c->fd_out = open(out_file, O_WRONLY);
 126                 free(out_file);
 127                 if (c->fd_out == -1) {
 128                         LOG_ERROR("could not open %s", service->port);
 129                         command_done(c->cmd_ctx);
 130                         free(c);
 131                         return ERROR_FAIL;
 132                 }
 133
 134                 LOG_INFO("accepting '%s' connection from pipe %s", service->name, service->port);
 135                 retval = service->new_connection(c);
 136                 if (retval != ERROR_OK) {
 137                         LOG_ERROR("attempted '%s' connection rejected", service->name);
 138                         command_done(c->cmd_ctx);
 139                         free(c);
 140                         return retval;
 141                 }
 142         }
 143
 144         /* add to the end of linked list */
 145         for (p = &service->connections; *p; p = &(*p)->next)
 146                 ;
 147         *p = c;
 148
 149         if (service->max_connections != CONNECTION_LIMIT_UNLIMITED)
 150                 service->max_connections--;
 151
 152         return ERROR_OK;
 153 }
 154
 155 static int remove_connection(struct service *service, struct connection *connection)
 156 {
 157         struct connection **p = &service->connections;
 158         struct connection *c;
 159
 160         /* find connection */
 161         while ((c = *p)) {
 162                 if (c->fd == connection->fd) {
 163                         service->connection_closed(c);
 164                         if (service->type == CONNECTION_TCP)
 165                                 close_socket(c->fd);
 166                         else if (service->type == CONNECTION_PIPE) {
 167                                 /* The service will listen to the pipe again */
 168                                 c->service->fd = c->fd;
 169                         }
 170
 171                         command_done(c->cmd_ctx);
 172
 173                         /* delete connection */
 174                         *p = c->next;
 175                         free(c);
 176
 177                         if (service->max_connections != CONNECTION_LIMIT_UNLIMITED)
 178                                 service->max_connections++;
 179
 180                         break;
 181                 }
 182
 183                 /* redirect p to next list pointer */
 184                 p = &(*p)->next;
 185         }
 186
 187         return ERROR_OK;
 188 }
 189
 190 static void free_service(struct service *c)
 191 {
 192         free(c->name);
 193         free(c->port);
 194         free(c);
 195 }
 196
 197 int add_service(const struct service_driver *driver, const char *port,
 198                 int max_connections, void *priv)
 199 {
 200         struct service *c, **p;
 201         struct hostent *hp;
 202         int so_reuseaddr_option = 1;
 203
 204         c = malloc(sizeof(struct service));
 205
 206         c->name = strdup(driver->name);
 207         c->port = strdup(port);
 208         c->max_connections = 1; /* Only TCP/IP ports can support more than one connection */
 209         c->fd = -1;
 210         c->connections = NULL;
 211         c->new_connection_during_keep_alive = driver->new_connection_during_keep_alive_handler;
 212         c->new_connection = driver->new_connection_handler;
 213         c->input = driver->input_handler;
 214         c->connection_closed = driver->connection_closed_handler;
 215         c->keep_client_alive = driver->keep_client_alive_handler;
 216         c->priv = priv;
 217         c->next = NULL;
 218         long portnumber;
 219         if (strcmp(c->port, "pipe") == 0)
 220                 c->type = CONNECTION_STDINOUT;
 221         else {
 222                 char *end;
 223                 portnumber = strtol(c->port, &end, 0);
 224                 if (!*end && (parse_long(c->port, &portnumber) == ERROR_OK)) {
 225                         c->portnumber = portnumber;
 226                         c->type = CONNECTION_TCP;
 227                 } else
 228                         c->type = CONNECTION_PIPE;
 229         }
 230
 231         if (c->type == CONNECTION_TCP) {
 232                 c->max_connections = max_connections;
 233
 234                 c->fd = socket(AF_INET, SOCK_STREAM, 0);
 235                 if (c->fd == -1) {
 236                         LOG_ERROR("error creating socket: %s", strerror(errno));
 237                         free_service(c);
 238                         return ERROR_FAIL;
 239                 }
 240
 241                 setsockopt(c->fd,
 242                         SOL_SOCKET,
 243                         SO_REUSEADDR,
 244                         (void *)&so_reuseaddr_option,
 245                         sizeof(int));
 246
 247                 socket_nonblock(c->fd);
 248
 249                 memset(&c->sin, 0, sizeof(c->sin));
 250                 c->sin.sin_family = AF_INET;
 251
 252                 if (!bindto_name)
 253                         c->sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 254                 else {
 255                         hp = gethostbyname(bindto_name);
 256                         if (!hp) {
 257                                 LOG_ERROR("couldn't resolve bindto address: %s", bindto_name);
 258                                 close_socket(c->fd);
 259                                 free_service(c);
 260                                 return ERROR_FAIL;
 261                         }
 262                         memcpy(&c->sin.sin_addr, hp->h_addr_list[0], hp->h_length);
 263                 }
 264                 c->sin.sin_port = htons(c->portnumber);
 265
 266                 if (bind(c->fd, (struct sockaddr *)&c->sin, sizeof(c->sin)) == -1) {
 267                         LOG_ERROR("couldn't bind %s to socket on port %d: %s", c->name, c->portnumber, strerror(errno));
 268                         close_socket(c->fd);
 269                         free_service(c);
 270                         return ERROR_FAIL;
 271                 }
 272
 273 #ifndef _WIN32
 274                 int segsize = 65536;
 275                 setsockopt(c->fd, IPPROTO_TCP, TCP_MAXSEG,  &segsize, sizeof(int));
 276 #endif
 277                 int window_size = 128 * 1024;
 278
 279                 /* These setsockopt()s must happen before the listen() */
 280
 281                 setsockopt(c->fd, SOL_SOCKET, SO_SNDBUF,
 282                         (char *)&window_size, sizeof(window_size));
 283                 setsockopt(c->fd, SOL_SOCKET, SO_RCVBUF,
 284                         (char *)&window_size, sizeof(window_size));
 285
 286                 if (listen(c->fd, 1) == -1) {
 287                         LOG_ERROR("couldn't listen on socket: %s", strerror(errno));
 288                         close_socket(c->fd);
 289                         free_service(c);
 290                         return ERROR_FAIL;
 291                 }
 292
 293                 struct sockaddr_in addr_in;
 294                 addr_in.sin_port = 0;
 295                 socklen_t addr_in_size = sizeof(addr_in);
 296                 if (getsockname(c->fd, (struct sockaddr *)&addr_in, &addr_in_size) == 0)
 297                         LOG_INFO("Listening on port %hu for %s connections",
 298                                  ntohs(addr_in.sin_port), c->name);
 299         } else if (c->type == CONNECTION_STDINOUT) {
 300                 c->fd = fileno(stdin);
 301
 302 #ifdef _WIN32
 303                 /* for win32 set stdin/stdout to binary mode */
 304                 if (_setmode(_fileno(stdout), _O_BINARY) < 0)
 305                         LOG_WARNING("cannot change stdout mode to binary");
 306                 if (_setmode(_fileno(stdin), _O_BINARY) < 0)
 307                         LOG_WARNING("cannot change stdin mode to binary");
 308                 if (_setmode(_fileno(stderr), _O_BINARY) < 0)
 309                         LOG_WARNING("cannot change stderr mode to binary");
 310 #else
 311                 socket_nonblock(c->fd);
 312 #endif
 313         } else if (c->type == CONNECTION_PIPE) {
 314 #ifdef _WIN32
 315                 /* we currently do not support named pipes under win32
 316                  * so exit openocd for now */
 317                 LOG_ERROR("Named pipes currently not supported under this os");
 318                 free_service(c);
 319                 return ERROR_FAIL;
 320 #else
 321                 /* Pipe we're reading from */
 322                 c->fd = open(c->port, O_RDONLY | O_NONBLOCK);
 323                 if (c->fd == -1) {
 324                         LOG_ERROR("could not open %s", c->port);
 325                         free_service(c);
 326                         return ERROR_FAIL;
 327                 }
 328 #endif
 329         }
 330
 331         /* add to the end of linked list */
 332         for (p = &services; *p; p = &(*p)->next)
 333                 ;
 334         *p = c;
 335
 336         return ERROR_OK;
 337 }
 338
 339 static void remove_connections(struct service *service)
 340 {
 341         struct connection *connection;
 342
 343         connection = service->connections;
 344
 345         while (connection) {
 346                 struct connection *tmp;
 347
 348                 tmp = connection->next;
 349                 remove_connection(service, connection);
 350                 connection = tmp;
 351         }
 352 }
 353
 354 int remove_service(const char *name, const char *port)
 355 {
 356         struct service *tmp;
 357         struct service *prev;
 358
 359         prev = services;
 360
 361         for (tmp = services; tmp; prev = tmp, tmp = tmp->next) {
 362                 if (!strcmp(tmp->name, name) && !strcmp(tmp->port, port)) {
 363                         remove_connections(tmp);
 364
 365                         if (tmp == services)
 366                                 services = tmp->next;
 367                         else
 368                                 prev->next = tmp->next;
 369
 370                         if (tmp->type != CONNECTION_STDINOUT)
 371                                 close_socket(tmp->fd);
 372
 373                         free(tmp->priv);
 374                         free_service(tmp);
 375
 376                         return ERROR_OK;
 377                 }
 378         }
 379
 380         return ERROR_OK;
 381 }
 382
 383 static int remove_services(void)
 384 {
 385         struct service *c = services;
 386
 387         /* loop service */
 388         while (c) {
 389                 struct service *next = c->next;
 390
 391                 remove_connections(c);
 392
 393                 free(c->name);
 394
 395                 if (c->type == CONNECTION_PIPE) {
 396                         if (c->fd != -1)
 397                                 close(c->fd);
 398                 }
 399                 free(c->port);
 400                 free(c->priv);
 401                 /* delete service */
 402                 free(c);
 403
 404                 /* remember the last service for unlinking */
 405                 c = next;
 406         }
 407
 408         services = NULL;
 409
 410         return ERROR_OK;
 411 }
 412
 413 void server_keep_clients_alive(void)
 414 {
 415         for (struct service *s = services; s; s = s->next)
 416                 if (s->keep_client_alive)
 417                         for (struct connection *c = s->connections; c; c = c->next)
 418                                 s->keep_client_alive(c);
 419 }
 420
 421 int server_loop(struct command_context *command_context)
 422 {
 423         struct service *service;
 424
 425         bool poll_ok = true;
 426
 427         /* used in select() */
 428         fd_set read_fds;
 429         int fd_max;
 430
 431         /* used in accept() */
 432         int retval;
 433
 434         int64_t next_event = timeval_ms() + polling_period;
 435
 436 #ifndef _WIN32
 437         if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
 438                 LOG_ERROR("couldn't set SIGPIPE to SIG_IGN");
 439 #endif
 440
 441         while (shutdown_openocd == CONTINUE_MAIN_LOOP) {
 442                 /* monitor sockets for activity */
 443                 fd_max = 0;
 444                 FD_ZERO(&read_fds);
 445
 446                 /* add service and connection fds to read_fds */
 447                 for (service = services; service; service = service->next) {
 448                         if (service->fd != -1) {
 449                                 /* listen for new connections */
 450                                 FD_SET(service->fd, &read_fds);
 451
 452                                 if (service->fd > fd_max)
 453                                         fd_max = service->fd;
 454                         }
 455
 456                         if (service->connections) {
 457                                 struct connection *c;
 458
 459                                 for (c = service->connections; c; c = c->next) {
 460                                         /* check for activity on the connection */
 461                                         FD_SET(c->fd, &read_fds);
 462                                         if (c->fd > fd_max)
 463                                                 fd_max = c->fd;
 464                                 }
 465                         }
 466                 }
 467
 468                 struct timeval tv;
 469                 tv.tv_sec = 0;
 470                 if (poll_ok) {
 471                         /* we're just polling this iteration, this is faster on embedded
 472                          * hosts */
 473                         tv.tv_usec = 0;
 474                         retval = socket_select(fd_max + 1, &read_fds, NULL, NULL, &tv);
 475                 } else {
 476                         /* Every 100ms, can be changed with "poll_period" command */
 477                         int timeout_ms = next_event - timeval_ms();
 478                         if (timeout_ms < 0)
 479                                 timeout_ms = 0;
 480                         else if (timeout_ms > polling_period)
 481                                 timeout_ms = polling_period;
 482                         tv.tv_usec = timeout_ms * 1000;
 483                         /* Only while we're sleeping we'll let others run */
 484                         retval = socket_select(fd_max + 1, &read_fds, NULL, NULL, &tv);
 485                 }
 486
 487                 if (retval == -1) {
 488 #ifdef _WIN32
 489
 490                         errno = WSAGetLastError();
 491
 492                         if (errno == WSAEINTR)
 493                                 FD_ZERO(&read_fds);
 494                         else {
 495                                 LOG_ERROR("error during select: %s", strerror(errno));
 496                                 return ERROR_FAIL;
 497                         }
 498 #else
 499
 500                         if (errno == EINTR)
 501                                 FD_ZERO(&read_fds);
 502                         else {
 503                                 LOG_ERROR("error during select: %s", strerror(errno));
 504                                 return ERROR_FAIL;
 505                         }
 506 #endif
 507                 }
 508
 509                 if (retval == 0) {
 510                         /* We only execute these callbacks when there was nothing to do or we timed
 511                          *out */
 512                         target_call_timer_callbacks_now();
 513                         next_event = target_timer_next_event();
 514                         process_jim_events(command_context);
 515
 516                         FD_ZERO(&read_fds);     /* eCos leaves read_fds unchanged in this case!  */
 517
 518                         /* We timed out/there was nothing to do, timeout rather than poll next time
 519                          **/
 520                         poll_ok = false;
 521                 } else {
 522                         /* There was something to do, next time we'll just poll */
 523                         poll_ok = true;
 524                 }
 525
 526                 /* This is a simple back-off algorithm where we immediately
 527                  * re-poll if we did something this time around.
 528                  *
 529                  * This greatly improves performance of DCC.
 530                  */
 531                 poll_ok = poll_ok || target_got_message();
 532
 533                 for (service = services; service; service = service->next) {
 534                         /* handle new connections on listeners */
 535                         if ((service->fd != -1)
 536                                 && (FD_ISSET(service->fd, &read_fds))) {
 537                                 if (service->max_connections != 0)
 538                                         add_connection(service, command_context);
 539                                 else {
 540                                         if (service->type == CONNECTION_TCP) {
 541                                                 struct sockaddr_in sin;
 542                                                 socklen_t address_size = sizeof(sin);
 543                                                 int tmp_fd;
 544                                                 tmp_fd = accept(service->fd,
 545                                                                 (struct sockaddr *)&service->sin,
 546                                                                 &address_size);
 547                                                 close_socket(tmp_fd);
 548                                         }
 549                                         LOG_INFO(
 550                                                 "rejected '%s' connection, no more connections allowed",
 551                                                 service->name);
 552                                 }
 553                         }
 554
 555                         /* handle activity on connections */
 556                         if (service->connections) {
 557                                 struct connection *c;
 558
 559                                 for (c = service->connections; c; ) {
 560                                         if ((c->fd >= 0 && FD_ISSET(c->fd, &read_fds)) || c->input_pending) {
 561                                                 retval = service->input(c);
 562                                                 if (retval != ERROR_OK) {
 563                                                         struct connection *next = c->next;
 564                                                         if (service->type == CONNECTION_PIPE ||
 565                                                                         service->type == CONNECTION_STDINOUT) {
 566                                                                 /* if connection uses a pipe then
 567                                                                  * shutdown openocd on error */
 568                                                                 shutdown_openocd = SHUTDOWN_REQUESTED;
 569                                                         }
 570                                                         remove_connection(service, c);
 571                                                         LOG_INFO("dropped '%s' connection",
 572                                                                 service->name);
 573                                                         c = next;
 574                                                         continue;
 575                                                 }
 576                                         }
 577                                         c = c->next;
 578                                 }
 579                         }
 580                 }
 581
 582 #ifdef _WIN32
 583                 MSG msg;
 584                 while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
 585                         if (msg.message == WM_QUIT)
 586                                 shutdown_openocd = SHUTDOWN_WITH_SIGNAL_CODE;
 587                 }
 588 #endif
 589         }
 590
 591         /* when quit for signal or CTRL-C, run (eventually user implemented) "shutdown" */
 592         if (shutdown_openocd == SHUTDOWN_WITH_SIGNAL_CODE)
 593                 command_run_line(command_context, "shutdown");
 594
 595         return shutdown_openocd == SHUTDOWN_WITH_ERROR_CODE ? ERROR_FAIL : ERROR_OK;
 596 }
 597
 598 static void sig_handler(int sig)
 599 {
 600         /* store only first signal that hits us */
 601         if (shutdown_openocd == CONTINUE_MAIN_LOOP) {
 602                 shutdown_openocd = SHUTDOWN_WITH_SIGNAL_CODE;
 603                 last_signal = sig;
 604                 LOG_DEBUG("Terminating on Signal %d", sig);
 605         } else
 606                 LOG_DEBUG("Ignored extra Signal %d", sig);
 607 }
 608
 609
 610 #ifdef _WIN32
 611 BOOL WINAPI control_handler(DWORD ctrl_type)
 612 {
 613         shutdown_openocd = SHUTDOWN_WITH_SIGNAL_CODE;
 614         return TRUE;
 615 }
 616 #else
 617 static void sigkey_handler(int sig)
 618 {
 619         /* ignore keystroke generated signals if not in foreground process group */
 620
 621         if (tcgetpgrp(STDIN_FILENO) > 0)
 622                 sig_handler(sig);
 623         else
 624                 LOG_DEBUG("Ignored Signal %d", sig);
 625 }
 626 #endif
 627
 628
 629 int server_host_os_entry(void)
 630 {
 631         /* this currently only calls WSAStartup on native win32 systems
 632          * before any socket operations are performed.
 633          * This is an issue if you call init in your config script */
 634
 635 #ifdef _WIN32
 636         WORD version_requested;
 637         WSADATA wsadata;
 638
 639         version_requested = MAKEWORD(2, 2);
 640
 641         if (WSAStartup(version_requested, &wsadata) != 0) {
 642                 LOG_ERROR("Failed to Open Winsock");
 643                 return ERROR_FAIL;
 644         }
 645 #endif
 646         return ERROR_OK;
 647 }
 648
 649 int server_host_os_close(void)
 650 {
 651 #ifdef _WIN32
 652         WSACleanup();
 653 #endif
 654         return ERROR_OK;
 655 }
 656
 657 int server_preinit(void)
 658 {
 659 #ifdef _WIN32
 660         /* register ctrl-c handler */
 661         SetConsoleCtrlHandler(control_handler, TRUE);
 662
 663         signal(SIGBREAK, sig_handler);
 664         signal(SIGINT, sig_handler);
 665 #else
 666         signal(SIGHUP, sig_handler);
 667         signal(SIGPIPE, sig_handler);
 668         signal(SIGQUIT, sigkey_handler);
 669         signal(SIGINT, sigkey_handler);
 670 #endif
 671         signal(SIGTERM, sig_handler);
 672         signal(SIGABRT, sig_handler);
 673
 674         return ERROR_OK;
 675 }
 676
 677 int server_init(struct command_context *cmd_ctx)
 678 {
 679         int ret = tcl_init();
 680
 681         if (ret != ERROR_OK)
 682                 return ret;
 683
 684         ret = telnet_init("Open On-Chip Debugger");
 685
 686         if (ret != ERROR_OK) {
 687                 remove_services();
 688                 return ret;
 689         }
 690
 691         return ERROR_OK;
 692 }
 693
 694 int server_quit(void)
 695 {
 696         remove_services();
 697         target_quit();
 698
 699 #ifdef _WIN32
 700         SetConsoleCtrlHandler(control_handler, FALSE);
 701
 702         return ERROR_OK;
 703 #endif
 704
 705         /* return signal number so we can kill ourselves */
 706         return last_signal;
 707 }
 708
 709 void server_free(void)
 710 {
 711         tcl_service_free();
 712         telnet_service_free();
 713         jsp_service_free();
 714
 715         free(bindto_name);
 716 }
 717
 718 void exit_on_signal(int sig)
 719 {
 720 #ifndef _WIN32
 721         /* bring back default system handler and kill yourself */
 722         signal(sig, SIG_DFL);
 723         kill(getpid(), sig);
 724 #endif
 725 }
 726
 727 int connection_write(struct connection *connection, const void *data, int len)
 728 {
 729         if (len == 0) {
 730                 /* successful no-op. Sockets and pipes behave differently here... */
 731                 return 0;
 732         }
 733         if (connection->service->type == CONNECTION_TCP)
 734                 return write_socket(connection->fd_out, data, len);
 735         else
 736                 return write(connection->fd_out, data, len);
 737 }
 738
 739 int connection_read(struct connection *connection, void *data, int len)
 740 {
 741         if (connection->service->type == CONNECTION_TCP)
 742                 return read_socket(connection->fd, data, len);
 743         else
 744                 return read(connection->fd, data, len);
 745 }
 746
 747 /* tell the server we want to shut down */
 748 COMMAND_HANDLER(handle_shutdown_command)
 749 {
 750         LOG_USER("shutdown command invoked");
 751
 752         shutdown_openocd = SHUTDOWN_REQUESTED;
 753
 754         command_run_line(CMD_CTX, "_run_pre_shutdown_commands");
 755
 756         if (CMD_ARGC == 1) {
 757                 if (!strcmp(CMD_ARGV[0], "error")) {
 758                         shutdown_openocd = SHUTDOWN_WITH_ERROR_CODE;
 759                         return ERROR_FAIL;
 760                 }
 761         }
 762
 763         return ERROR_COMMAND_CLOSE_CONNECTION;
 764 }
 765
 766 COMMAND_HANDLER(handle_poll_period_command)
 767 {
 768         if (CMD_ARGC == 0)
 769                 LOG_WARNING("You need to set a period value");
 770         else
 771                 COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], polling_period);
 772
 773         LOG_INFO("set servers polling period to %ums", polling_period);
 774
 775         return ERROR_OK;
 776 }
 777
 778 COMMAND_HANDLER(handle_bindto_command)
 779 {
 780         switch (CMD_ARGC) {
 781                 case 0:
 782                         command_print(CMD, "bindto name: %s", bindto_name);
 783                         break;
 784                 case 1:
 785                         free(bindto_name);
 786                         bindto_name = strdup(CMD_ARGV[0]);
 787                         break;
 788                 default:
 789                         return ERROR_COMMAND_SYNTAX_ERROR;
 790         }
 791         return ERROR_OK;
 792 }
 793
 794 static const struct command_registration server_command_handlers[] = {
 795         {
 796                 .name = "shutdown",
 797                 .handler = &handle_shutdown_command,
 798                 .mode = COMMAND_ANY,
 799                 .usage = "",
 800                 .help = "shut the server down",
 801         },
 802         {
 803                 .name = "poll_period",
 804                 .handler = &handle_poll_period_command,
 805                 .mode = COMMAND_ANY,
 806                 .usage = "",
 807                 .help = "set the servers polling period",
 808         },
 809         {
 810                 .name = "bindto",
 811                 .handler = &handle_bindto_command,
 812                 .mode = COMMAND_CONFIG,
 813                 .usage = "[name]",
 814                 .help = "Specify address by name on which to listen for "
 815                         "incoming TCP/IP connections",
 816         },
 817         COMMAND_REGISTRATION_DONE
 818 };
 819
 820 int server_register_commands(struct command_context *cmd_ctx)
 821 {
 822         int retval = telnet_register_commands(cmd_ctx);
 823         if (retval != ERROR_OK)
 824                 return retval;
 825
 826         retval = tcl_register_commands(cmd_ctx);
 827         if (retval != ERROR_OK)
 828                 return retval;
 829
 830         retval = jsp_register_commands(cmd_ctx);
 831         if (retval != ERROR_OK)
 832                 return retval;
 833
 834         return register_commands(cmd_ctx, NULL, server_command_handlers);
 835 }
 836
 837 COMMAND_HELPER(server_port_command, unsigned short *out)
 838 {
 839         switch (CMD_ARGC) {
 840                 case 0:
 841                         command_print(CMD, "%d", *out);
 842                         break;
 843                 case 1:
 844                 {
 845                         uint16_t port;
 846                         COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], port);
 847                         *out = port;
 848                         break;
 849                 }
 850                 default:
 851                         return ERROR_COMMAND_SYNTAX_ERROR;
 852         }
 853         return ERROR_OK;
 854 }
 855
 856 COMMAND_HELPER(server_pipe_command, char **out)
 857 {
 858         switch (CMD_ARGC) {
 859                 case 0:
 860                         command_print(CMD, "%s", *out);
 861                         break;
 862                 case 1:
 863                 {
 864                         if (CMD_CTX->mode == COMMAND_EXEC) {
 865                                 LOG_WARNING("unable to change server port after init");
 866                                 return ERROR_COMMAND_ARGUMENT_INVALID;
 867                         }
 868                         free(*out);
 869                         *out = strdup(CMD_ARGV[0]);
 870                         break;
 871                 }
 872                 default:
 873                         return ERROR_COMMAND_SYNTAX_ERROR;
 874         }
 875         return ERROR_OK;
 876 }