1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2007-2010 Øyvind Harboe *
6 * oyvind.harboe@zylin.com *
8 * Copyright (C) 2008 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
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. *
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. *
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 ***************************************************************************/
30 #include <target/target.h>
31 #include <target/target_request.h>
32 #include <target/openrisc/jsp_server.h>
34 #include "tcl_server.h"
35 #include "telnet_server.h"
44 #include <netinet/tcp.h>
47 static struct service
*services
;
49 enum shutdown_reason
{
50 CONTINUE_MAIN_LOOP
, /* stay in main event loop */
51 SHUTDOWN_REQUESTED
, /* set by shutdown command; exit the event loop and quit the debugger */
52 SHUTDOWN_WITH_ERROR_CODE
, /* set by shutdown command; quit with non-zero return code */
53 SHUTDOWN_WITH_SIGNAL_CODE
/* set by sig_handler; exec shutdown then exit with signal as return code */
55 static enum shutdown_reason shutdown_openocd
= CONTINUE_MAIN_LOOP
;
57 /* store received signal to exit application by killing ourselves */
58 static int last_signal
;
60 /* set the polling period to 100ms */
61 static int polling_period
= 100;
63 /* address by name on which to listen for incoming TCP/IP connections */
64 static char *bindto_name
;
66 static int add_connection(struct service
*service
, struct command_context
*cmd_ctx
)
68 socklen_t address_size
;
69 struct connection
*c
, **p
;
73 c
= malloc(sizeof(struct connection
));
76 memset(&c
->sin
, 0, sizeof(c
->sin
));
77 c
->cmd_ctx
= copy_command_context(cmd_ctx
);
83 if (service
->type
== CONNECTION_TCP
) {
84 address_size
= sizeof(c
->sin
);
86 c
->fd
= accept(service
->fd
, (struct sockaddr
*)&service
->sin
, &address_size
);
89 /* This increases performance dramatically for e.g. GDB load which
90 * does not have a sliding window protocol.
92 * Ignore errors from this fn as it probably just means less performance
94 setsockopt(c
->fd
, /* socket affected */
95 IPPROTO_TCP
, /* set option at TCP level */
96 TCP_NODELAY
, /* name of option */
97 (char *)&flag
, /* the cast is historical cruft */
98 sizeof(int)); /* length of option value */
100 LOG_INFO("accepting '%s' connection on tcp/%s", service
->name
, service
->port
);
101 retval
= service
->new_connection(c
);
102 if (retval
!= ERROR_OK
) {
104 LOG_ERROR("attempted '%s' connection rejected", service
->name
);
105 command_done(c
->cmd_ctx
);
109 } else if (service
->type
== CONNECTION_STDINOUT
) {
111 c
->fd_out
= fileno(stdout
);
114 /* we are using stdin/out so ignore ctrl-c under windoze */
115 SetConsoleCtrlHandler(NULL
, TRUE
);
118 /* do not check for new connections again on stdin */
121 LOG_INFO("accepting '%s' connection from pipe", service
->name
);
122 retval
= service
->new_connection(c
);
123 if (retval
!= ERROR_OK
) {
124 LOG_ERROR("attempted '%s' connection rejected", service
->name
);
125 command_done(c
->cmd_ctx
);
129 } else if (service
->type
== CONNECTION_PIPE
) {
131 /* do not check for new connections again on stdin */
134 char *out_file
= alloc_printf("%so", service
->port
);
135 c
->fd_out
= open(out_file
, O_WRONLY
);
137 if (c
->fd_out
== -1) {
138 LOG_ERROR("could not open %s", service
->port
);
139 command_done(c
->cmd_ctx
);
144 LOG_INFO("accepting '%s' connection from pipe %s", service
->name
, service
->port
);
145 retval
= service
->new_connection(c
);
146 if (retval
!= ERROR_OK
) {
147 LOG_ERROR("attempted '%s' connection rejected", service
->name
);
148 command_done(c
->cmd_ctx
);
154 /* add to the end of linked list */
155 for (p
= &service
->connections
; *p
; p
= &(*p
)->next
)
159 if (service
->max_connections
!= CONNECTION_LIMIT_UNLIMITED
)
160 service
->max_connections
--;
165 static int remove_connection(struct service
*service
, struct connection
*connection
)
167 struct connection
**p
= &service
->connections
;
168 struct connection
*c
;
170 /* find connection */
172 if (c
->fd
== connection
->fd
) {
173 service
->connection_closed(c
);
174 if (service
->type
== CONNECTION_TCP
)
176 else if (service
->type
== CONNECTION_PIPE
) {
177 /* The service will listen to the pipe again */
178 c
->service
->fd
= c
->fd
;
181 command_done(c
->cmd_ctx
);
183 /* delete connection */
187 if (service
->max_connections
!= CONNECTION_LIMIT_UNLIMITED
)
188 service
->max_connections
++;
193 /* redirect p to next list pointer */
200 static void free_service(struct service
*c
)
207 int add_service(char *name
,
210 new_connection_handler_t new_connection_handler
,
211 input_handler_t input_handler
,
212 connection_closed_handler_t connection_closed_handler
,
215 struct service
*c
, **p
;
217 int so_reuseaddr_option
= 1;
219 c
= malloc(sizeof(struct service
));
221 c
->name
= strdup(name
);
222 c
->port
= strdup(port
);
223 c
->max_connections
= 1; /* Only TCP/IP ports can support more than one connection */
225 c
->connections
= NULL
;
226 c
->new_connection
= new_connection_handler
;
227 c
->input
= input_handler
;
228 c
->connection_closed
= connection_closed_handler
;
232 if (strcmp(c
->port
, "pipe") == 0)
233 c
->type
= CONNECTION_STDINOUT
;
236 portnumber
= strtol(c
->port
, &end
, 0);
237 if (!*end
&& (parse_long(c
->port
, &portnumber
) == ERROR_OK
)) {
238 c
->portnumber
= portnumber
;
239 c
->type
= CONNECTION_TCP
;
241 c
->type
= CONNECTION_PIPE
;
244 if (c
->type
== CONNECTION_TCP
) {
245 c
->max_connections
= max_connections
;
247 c
->fd
= socket(AF_INET
, SOCK_STREAM
, 0);
249 LOG_ERROR("error creating socket: %s", strerror(errno
));
257 (void *)&so_reuseaddr_option
,
260 socket_nonblock(c
->fd
);
262 memset(&c
->sin
, 0, sizeof(c
->sin
));
263 c
->sin
.sin_family
= AF_INET
;
265 if (bindto_name
== NULL
)
266 c
->sin
.sin_addr
.s_addr
= htonl(INADDR_LOOPBACK
);
268 hp
= gethostbyname(bindto_name
);
270 LOG_ERROR("couldn't resolve bindto address: %s", bindto_name
);
275 memcpy(&c
->sin
.sin_addr
, hp
->h_addr_list
[0], hp
->h_length
);
277 c
->sin
.sin_port
= htons(c
->portnumber
);
279 if (bind(c
->fd
, (struct sockaddr
*)&c
->sin
, sizeof(c
->sin
)) == -1) {
280 LOG_ERROR("couldn't bind %s to socket on port %d: %s", name
, c
->portnumber
, strerror(errno
));
288 setsockopt(c
->fd
, IPPROTO_TCP
, TCP_MAXSEG
, &segsize
, sizeof(int));
290 int window_size
= 128 * 1024;
292 /* These setsockopt()s must happen before the listen() */
294 setsockopt(c
->fd
, SOL_SOCKET
, SO_SNDBUF
,
295 (char *)&window_size
, sizeof(window_size
));
296 setsockopt(c
->fd
, SOL_SOCKET
, SO_RCVBUF
,
297 (char *)&window_size
, sizeof(window_size
));
299 if (listen(c
->fd
, 1) == -1) {
300 LOG_ERROR("couldn't listen on socket: %s", strerror(errno
));
306 struct sockaddr_in addr_in
;
307 addr_in
.sin_port
= 0;
308 socklen_t addr_in_size
= sizeof(addr_in
);
309 if (getsockname(c
->fd
, (struct sockaddr
*)&addr_in
, &addr_in_size
) == 0)
310 LOG_INFO("Listening on port %hu for %s connections",
311 ntohs(addr_in
.sin_port
), name
);
312 } else if (c
->type
== CONNECTION_STDINOUT
) {
313 c
->fd
= fileno(stdin
);
316 /* for win32 set stdin/stdout to binary mode */
317 if (_setmode(_fileno(stdout
), _O_BINARY
) < 0)
318 LOG_WARNING("cannot change stdout mode to binary");
319 if (_setmode(_fileno(stdin
), _O_BINARY
) < 0)
320 LOG_WARNING("cannot change stdin mode to binary");
321 if (_setmode(_fileno(stderr
), _O_BINARY
) < 0)
322 LOG_WARNING("cannot change stderr mode to binary");
324 socket_nonblock(c
->fd
);
326 } else if (c
->type
== CONNECTION_PIPE
) {
328 /* we currenty do not support named pipes under win32
329 * so exit openocd for now */
330 LOG_ERROR("Named pipes currently not supported under this os");
334 /* Pipe we're reading from */
335 c
->fd
= open(c
->port
, O_RDONLY
| O_NONBLOCK
);
337 LOG_ERROR("could not open %s", c
->port
);
344 /* add to the end of linked list */
345 for (p
= &services
; *p
; p
= &(*p
)->next
)
352 static void remove_connections(struct service
*service
)
354 struct connection
*connection
;
356 connection
= service
->connections
;
359 struct connection
*tmp
;
361 tmp
= connection
->next
;
362 remove_connection(service
, connection
);
367 static int remove_services(void)
369 struct service
*c
= services
;
373 struct service
*next
= c
->next
;
375 remove_connections(c
);
380 if (c
->type
== CONNECTION_PIPE
) {
393 /* remember the last service for unlinking */
402 int server_loop(struct command_context
*command_context
)
404 struct service
*service
;
408 /* used in select() */
412 /* used in accept() */
416 if (signal(SIGPIPE
, SIG_IGN
) == SIG_ERR
)
417 LOG_ERROR("couldn't set SIGPIPE to SIG_IGN");
420 while (shutdown_openocd
== CONTINUE_MAIN_LOOP
) {
421 /* monitor sockets for activity */
425 /* add service and connection fds to read_fds */
426 for (service
= services
; service
; service
= service
->next
) {
427 if (service
->fd
!= -1) {
428 /* listen for new connections */
429 FD_SET(service
->fd
, &read_fds
);
431 if (service
->fd
> fd_max
)
432 fd_max
= service
->fd
;
435 if (service
->connections
) {
436 struct connection
*c
;
438 for (c
= service
->connections
; c
; c
= c
->next
) {
439 /* check for activity on the connection */
440 FD_SET(c
->fd
, &read_fds
);
450 /* we're just polling this iteration, this is faster on embedded
453 retval
= socket_select(fd_max
+ 1, &read_fds
, NULL
, NULL
, &tv
);
455 /* Every 100ms, can be changed with "poll_period" command */
456 tv
.tv_usec
= polling_period
* 1000;
457 /* Only while we're sleeping we'll let others run */
458 openocd_sleep_prelude();
460 retval
= socket_select(fd_max
+ 1, &read_fds
, NULL
, NULL
, &tv
);
461 openocd_sleep_postlude();
467 errno
= WSAGetLastError();
469 if (errno
== WSAEINTR
)
472 LOG_ERROR("error during select: %s", strerror(errno
));
480 LOG_ERROR("error during select: %s", strerror(errno
));
487 /* We only execute these callbacks when there was nothing to do or we timed
489 target_call_timer_callbacks();
490 process_jim_events(command_context
);
492 FD_ZERO(&read_fds
); /* eCos leaves read_fds unchanged in this case! */
494 /* We timed out/there was nothing to do, timeout rather than poll next time
498 /* There was something to do, next time we'll just poll */
502 /* This is a simple back-off algorithm where we immediately
503 * re-poll if we did something this time around.
505 * This greatly improves performance of DCC.
507 poll_ok
= poll_ok
|| target_got_message();
509 for (service
= services
; service
; service
= service
->next
) {
510 /* handle new connections on listeners */
511 if ((service
->fd
!= -1)
512 && (FD_ISSET(service
->fd
, &read_fds
))) {
513 if (service
->max_connections
!= 0)
514 add_connection(service
, command_context
);
516 if (service
->type
== CONNECTION_TCP
) {
517 struct sockaddr_in sin
;
518 socklen_t address_size
= sizeof(sin
);
520 tmp_fd
= accept(service
->fd
,
521 (struct sockaddr
*)&service
->sin
,
523 close_socket(tmp_fd
);
526 "rejected '%s' connection, no more connections allowed",
531 /* handle activity on connections */
532 if (service
->connections
) {
533 struct connection
*c
;
535 for (c
= service
->connections
; c
; ) {
536 if ((FD_ISSET(c
->fd
, &read_fds
)) || c
->input_pending
) {
537 retval
= service
->input(c
);
538 if (retval
!= ERROR_OK
) {
539 struct connection
*next
= c
->next
;
540 if (service
->type
== CONNECTION_PIPE
||
541 service
->type
== CONNECTION_STDINOUT
) {
542 /* if connection uses a pipe then
543 * shutdown openocd on error */
544 shutdown_openocd
= SHUTDOWN_REQUESTED
;
546 remove_connection(service
, c
);
547 LOG_INFO("dropped '%s' connection",
560 while (PeekMessage(&msg
, NULL
, 0, 0, PM_REMOVE
)) {
561 if (msg
.message
== WM_QUIT
)
562 shutdown_openocd
= SHUTDOWN_WITH_SIGNAL_CODE
;
567 /* when quit for signal or CTRL-C, run (eventually user implemented) "shutdown" */
568 if (shutdown_openocd
== SHUTDOWN_WITH_SIGNAL_CODE
)
569 command_run_line(command_context
, "shutdown");
571 return shutdown_openocd
== SHUTDOWN_WITH_ERROR_CODE
? ERROR_FAIL
: ERROR_OK
;
574 void sig_handler(int sig
)
576 /* store only first signal that hits us */
577 if (shutdown_openocd
== CONTINUE_MAIN_LOOP
) {
578 shutdown_openocd
= SHUTDOWN_WITH_SIGNAL_CODE
;
580 LOG_DEBUG("Terminating on Signal %d", sig
);
582 LOG_DEBUG("Ignored extra Signal %d", sig
);
587 BOOL WINAPI
ControlHandler(DWORD dwCtrlType
)
589 shutdown_openocd
= SHUTDOWN_WITH_SIGNAL_CODE
;
593 static void sigkey_handler(int sig
)
595 /* ignore keystroke generated signals if not in foreground process group */
597 if (tcgetpgrp(STDIN_FILENO
) > 0)
600 LOG_DEBUG("Ignored Signal %d", sig
);
605 int server_preinit(void)
607 /* this currently only calls WSAStartup on native win32 systems
608 * before any socket operations are performed.
609 * This is an issue if you call init in your config script */
612 WORD wVersionRequested
;
615 wVersionRequested
= MAKEWORD(2, 2);
617 if (WSAStartup(wVersionRequested
, &wsaData
) != 0) {
618 LOG_ERROR("Failed to Open Winsock");
622 /* register ctrl-c handler */
623 SetConsoleCtrlHandler(ControlHandler
, TRUE
);
625 signal(SIGBREAK
, sig_handler
);
626 signal(SIGINT
, sig_handler
);
628 signal(SIGHUP
, sig_handler
);
629 signal(SIGPIPE
, sig_handler
);
630 signal(SIGQUIT
, sigkey_handler
);
631 signal(SIGINT
, sigkey_handler
);
633 signal(SIGTERM
, sig_handler
);
634 signal(SIGABRT
, sig_handler
);
639 int server_init(struct command_context
*cmd_ctx
)
641 int ret
= tcl_init();
646 ret
= telnet_init("Open On-Chip Debugger");
648 if (ret
!= ERROR_OK
) {
656 int server_quit(void)
663 SetConsoleCtrlHandler(ControlHandler
, FALSE
);
668 /* return signal number so we can kill ourselves */
672 void server_free(void)
675 telnet_service_free();
679 void exit_on_signal(int sig
)
682 /* bring back default system handler and kill yourself */
683 signal(sig
, SIG_DFL
);
688 int connection_write(struct connection
*connection
, const void *data
, int len
)
691 /* successful no-op. Sockets and pipes behave differently here... */
694 if (connection
->service
->type
== CONNECTION_TCP
)
695 return write_socket(connection
->fd_out
, data
, len
);
697 return write(connection
->fd_out
, data
, len
);
700 int connection_read(struct connection
*connection
, void *data
, int len
)
702 if (connection
->service
->type
== CONNECTION_TCP
)
703 return read_socket(connection
->fd
, data
, len
);
705 return read(connection
->fd
, data
, len
);
708 /* tell the server we want to shut down */
709 COMMAND_HANDLER(handle_shutdown_command
)
711 LOG_USER("shutdown command invoked");
713 shutdown_openocd
= SHUTDOWN_REQUESTED
;
716 if (!strcmp(CMD_ARGV
[0], "error")) {
717 shutdown_openocd
= SHUTDOWN_WITH_ERROR_CODE
;
722 return ERROR_COMMAND_CLOSE_CONNECTION
;
725 COMMAND_HANDLER(handle_poll_period_command
)
728 LOG_WARNING("You need to set a period value");
730 COMMAND_PARSE_NUMBER(int, CMD_ARGV
[0], polling_period
);
732 LOG_INFO("set servers polling period to %ums", polling_period
);
737 COMMAND_HANDLER(handle_bindto_command
)
741 command_print(CMD_CTX
, "bindto name: %s", bindto_name
);
745 bindto_name
= strdup(CMD_ARGV
[0]);
748 return ERROR_COMMAND_SYNTAX_ERROR
;
753 static const struct command_registration server_command_handlers
[] = {
756 .handler
= &handle_shutdown_command
,
759 .help
= "shut the server down",
762 .name
= "poll_period",
763 .handler
= &handle_poll_period_command
,
766 .help
= "set the servers polling period",
770 .handler
= &handle_bindto_command
,
773 .help
= "Specify address by name on which to listen for "
774 "incoming TCP/IP connections",
776 COMMAND_REGISTRATION_DONE
779 int server_register_commands(struct command_context
*cmd_ctx
)
781 int retval
= telnet_register_commands(cmd_ctx
);
782 if (ERROR_OK
!= retval
)
785 retval
= tcl_register_commands(cmd_ctx
);
786 if (ERROR_OK
!= retval
)
789 retval
= jsp_register_commands(cmd_ctx
);
790 if (ERROR_OK
!= retval
)
793 return register_commands(cmd_ctx
, NULL
, server_command_handlers
);
796 COMMAND_HELPER(server_port_command
, unsigned short *out
)
800 command_print(CMD_CTX
, "%d", *out
);
805 COMMAND_PARSE_NUMBER(u16
, CMD_ARGV
[0], port
);
810 return ERROR_COMMAND_SYNTAX_ERROR
;
815 COMMAND_HELPER(server_pipe_command
, char **out
)
819 command_print(CMD_CTX
, "%s", *out
);
823 if (CMD_CTX
->mode
== COMMAND_EXEC
) {
824 LOG_WARNING("unable to change server port after init");
825 return ERROR_COMMAND_ARGUMENT_INVALID
;
828 *out
= strdup(CMD_ARGV
[0]);
832 return ERROR_COMMAND_SYNTAX_ERROR
;
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