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;