1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
23 #include "telnet_server.h"
31 #include <sys/types.h>
32 #include <sys/socket.h>
36 service_t
*services
= NULL
;
38 /* shutdown_openocd == 1: exit the main event loop, and quit the debugger */
39 static int shutdown_openocd
= 0;
40 int handle_shutdown_command(struct command_context_s
*cmd_ctx
, char *cmd
, char **args
, int argc
);
42 int add_connection(service_t
*service
, command_context_t
*cmd_ctx
)
44 unsigned int address_size
;
48 c
= malloc(sizeof(connection_t
));
50 memset(&c
->sin
, 0, sizeof(c
->sin
));
51 c
->cmd_ctx
= copy_command_context(cmd_ctx
);
57 address_size
= sizeof(c
->sin
);
58 c
->fd
= accept(service
->fd
, (struct sockaddr
*)&service
->sin
, &address_size
);
60 if ((retval
= service
->new_connection(c
)) == ERROR_OK
)
62 INFO("accepted '%s' connection from %i", service
->name
, c
->sin
.sin_port
);
67 INFO("attempted '%s' connection rejected", service
->name
);
71 if (service
->connections
)
73 for (p
= service
->connections
; p
&& p
->next
; p
= p
->next
);
79 service
->connections
= c
;
82 service
->max_connections
--;
87 int remove_connection(service_t
*service
, connection_t
*connection
)
89 connection_t
*c
, *p
= NULL
;
92 for (c
= service
->connections
; c
; c
= c
->next
)
94 if (c
->fd
== connection
->fd
)
96 /* unlink connection */
100 service
->connections
= c
->next
;
102 service
->connection_closed(c
);
105 command_done(c
->cmd_ctx
);
107 /* delete connection */
110 service
->max_connections
++;
114 /* remember the last connection for unlinking */
121 int add_service(char *name
, enum connection_type type
, unsigned short port
, int max_connections
, new_connection_handler_t new_connection_handler
, input_handler_t input_handler
, connection_closed_handler_t connection_closed_handler
, void *priv
)
124 int so_reuseaddr_option
= 1;
127 c
= malloc(sizeof(service_t
));
129 c
->name
= strdup(name
);
132 c
->max_connections
= max_connections
;
134 c
->connections
= NULL
;
135 c
->new_connection
= new_connection_handler
;
136 c
->input
= input_handler
;
137 c
->connection_closed
= connection_closed_handler
;
141 if ((c
->fd
= socket(AF_INET
, SOCK_STREAM
, 0)) == -1)
143 ERROR("error creating socket: %s", strerror(errno
));
147 setsockopt(c
->fd
, SOL_SOCKET
, SO_REUSEADDR
, &so_reuseaddr_option
, sizeof(int));
149 oldopts
= fcntl(c
->fd
, F_GETFL
, 0);
150 fcntl(c
->fd
, F_SETFL
, oldopts
| O_NONBLOCK
);
152 memset(&c
->sin
, 0, sizeof(c
->sin
));
153 c
->sin
.sin_family
= AF_INET
;
154 c
->sin
.sin_addr
.s_addr
= INADDR_ANY
;
155 c
->sin
.sin_port
= htons(port
);
157 if (bind(c
->fd
, (struct sockaddr
*)&c
->sin
, sizeof(c
->sin
)) == -1)
159 ERROR("couldn't bind to socket: %s", strerror(errno
));
163 if (listen(c
->fd
, 1) == -1)
165 ERROR("couldn't listen on socket: %s", strerror(errno
));
171 for (p
= services
; p
&& p
->next
; p
= p
->next
);
183 int remove_service(unsigned short port
)
185 service_t
*c
, *p
= NULL
;
188 for (c
= services
; c
; c
= c
->next
)
205 /* remember the last service for unlinking */
212 int server_loop(command_context_t
*command_context
)
216 /* used in select() */
221 /* used in accept() */
224 if (signal(SIGPIPE
, SIG_IGN
) == SIG_ERR
)
225 ERROR("couldn't set SIGPIPE to SIG_IGN");
227 /* do regular tasks after at most 10ms */
231 while(!shutdown_openocd
)
233 /* monitor sockets for acitvity */
237 /* add service and connection fds to read_fds */
238 for (service
= services
; service
; service
= service
->next
)
240 if (service
->fd
!= -1)
242 /* listen for new connections */
243 FD_SET(service
->fd
, &read_fds
);
245 if (service
->fd
> fd_max
)
246 fd_max
= service
->fd
;
249 if (service
->connections
)
253 for (c
= service
->connections
; c
; c
= c
->next
)
255 /* check for activity on the connection */
256 FD_SET(c
->fd
, &read_fds
);
263 /* add STDIN to read_fds */
264 FD_SET(fileno(stdin
), &read_fds
);
266 if ((retval
= select(fd_max
+ 1, &read_fds
, NULL
, NULL
, &tv
)) == -1)
272 ERROR("error during select: %s", strerror(errno
));
277 target_call_timer_callbacks();
281 /* do regular tasks after at most 100ms */
286 if (shutdown_openocd
)
287 return ERROR_COMMAND_CLOSE_CONNECTION
;
293 for (service
= services
; service
; service
= service
->next
)
295 /* handle new connections on listeners */
296 if ((service
->fd
!= -1)
297 && (FD_ISSET(service
->fd
, &read_fds
)))
299 if (service
->max_connections
> 0)
300 add_connection(service
, command_context
);
303 struct sockaddr_in sin
;
304 unsigned int address_size
= sizeof(sin
);
306 tmp_fd
= accept(service
->fd
, (struct sockaddr
*)&service
->sin
, &address_size
);
308 INFO("rejected '%s' connection, no more connections allowed", service
->name
);
312 /* handle activity on connections */
313 if (service
->connections
)
317 for (c
= service
->connections
; c
;)
319 if ((FD_ISSET(c
->fd
, &read_fds
)) || c
->input_pending
)
321 if (service
->input(c
) != ERROR_OK
)
323 connection_t
*next
= c
->next
;
324 remove_connection(service
, c
);
325 INFO("dropped '%s' connection", service
->name
);
335 if (FD_ISSET(fileno(stdin
), &read_fds
))
337 if (getc(stdin
) == 'x')
339 shutdown_openocd
= 1;
353 int server_register_commands(command_context_t
*context
)
355 register_command(context
, NULL
, "shutdown", handle_shutdown_command
,
356 COMMAND_ANY
, "shut the server down");
361 /* tell the server we want to shut down */
362 int handle_shutdown_command(struct command_context_s
*cmd_ctx
, char *cmd
, char **args
, int argc
)
364 shutdown_openocd
= 1;
366 return ERROR_COMMAND_CLOSE_CONNECTION
;
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