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- /***************************************************************************
- * Copyright (C) 2005 by Dominic Rath *
- * Dominic.Rath@gmx.de *
- * *
- * This program is free software; you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation; either version 2 of the License, or *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program; if not, write to the *
- * Free Software Foundation, Inc., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
- ***************************************************************************/
- #ifdef HAVE_CONFIG_H
- #include "config.h"
- #endif
-
- #include "replacements.h"
-
- #include "server.h"
-
- #include "log.h"
- #include "telnet_server.h"
- #include "target.h"
-
- #include <command.h>
- #include <string.h>
- #include <stdlib.h>
- #include <errno.h>
- #include <unistd.h>
- #include <sys/types.h>
- #include <fcntl.h>
- #include <signal.h>
-
- service_t *services = NULL;
-
- /* shutdown_openocd == 1: exit the main event loop, and quit the debugger */
- static int shutdown_openocd = 0;
- int handle_shutdown_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-
- int add_connection(service_t *service, command_context_t *cmd_ctx)
- {
- unsigned int address_size;
- connection_t *c, *p;
- int retval;
-
- c = malloc(sizeof(connection_t));
- c->fd = -1;
- memset(&c->sin, 0, sizeof(c->sin));
- c->cmd_ctx = copy_command_context(cmd_ctx);
- c->service = service;
- c->input_pending = 0;
- c->priv = NULL;
- c->next = NULL;
-
- address_size = sizeof(c->sin);
- c->fd = accept(service->fd, (struct sockaddr *)&service->sin, &address_size);
-
- if ((retval = service->new_connection(c)) == ERROR_OK)
- {
- INFO("accepted '%s' connection from %i", service->name, c->sin.sin_port);
- }
- else
- {
- close_socket(c->fd);
- INFO("attempted '%s' connection rejected", service->name);
- free(c);
- }
-
- if (service->connections)
- {
- for (p = service->connections; p && p->next; p = p->next);
- if (p)
- p->next = c;
- }
- else
- {
- service->connections = c;
- }
-
- service->max_connections--;
-
- return ERROR_OK;
- }
-
- int remove_connection(service_t *service, connection_t *connection)
- {
- connection_t *c = service->connections;
-
- /* find connection */
- while(c)
- {
- connection_t *next = c->next;
-
- if (c->fd == connection->fd)
- {
- service->connections = next;
- service->connection_closed(c);
- close_socket(c->fd);
-
- command_done(c->cmd_ctx);
-
- /* delete connection */
- free(c);
-
- service->max_connections++;
- break;
- }
-
- /* remember the last connection for unlinking */
- c = next;
- }
-
- return ERROR_OK;
- }
-
- 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)
- {
- service_t *c, *p;
- int so_reuseaddr_option = 1;
-
- c = malloc(sizeof(service_t));
-
- c->name = strdup(name);
- c->type = type;
- c->port = port;
- c->max_connections = max_connections;
- c->fd = -1;
- c->connections = NULL;
- c->new_connection = new_connection_handler;
- c->input = input_handler;
- c->connection_closed = connection_closed_handler;
- c->priv = priv;
- c->next = NULL;
-
- if ((c->fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
- {
- ERROR("error creating socket: %s", strerror(errno));
- exit(-1);
- }
-
- setsockopt(c->fd, SOL_SOCKET, SO_REUSEADDR, (void*)&so_reuseaddr_option, sizeof(int));
-
- socket_nonblock(c->fd);
-
- memset(&c->sin, 0, sizeof(c->sin));
- c->sin.sin_family = AF_INET;
- c->sin.sin_addr.s_addr = INADDR_ANY;
- c->sin.sin_port = htons(port);
-
- if (bind(c->fd, (struct sockaddr *)&c->sin, sizeof(c->sin)) == -1)
- {
- ERROR("couldn't bind to socket: %s", strerror(errno));
- exit(-1);
- }
-
- if (listen(c->fd, 1) == -1)
- {
- ERROR("couldn't listen on socket: %s", strerror(errno));
- exit(-1);
- }
-
- if (services)
- {
- for (p = services; p && p->next; p = p->next);
- if (p)
- p->next = c;
- }
- else
- {
- services = c;
- }
-
- return ERROR_OK;
- }
-
- int remove_service(unsigned short port)
- {
- service_t *c = services;
-
- /* find service */
- while(c)
- {
- service_t *next = c->next;
-
- if (c->port == port)
- {
- if (c->name)
- free(c->name);
-
- if (c->priv)
- free(c->priv);
-
- /* delete service */
- free(c);
- }
-
- /* remember the last service for unlinking */
- c = next;
- }
-
- return ERROR_OK;
- }
-
- int remove_services()
- {
- service_t *c = services;
-
- /* loop service */
- while(c)
- {
- service_t *next = c->next;
-
- if (c->name)
- free(c->name);
-
- if (c->priv)
- free(c->priv);
-
- /* delete service */
- free(c);
-
- /* remember the last service for unlinking */
- c = next;
- }
-
- return ERROR_OK;
- }
-
- int server_loop(command_context_t *command_context)
- {
- service_t *service;
-
- /* used in select() */
- fd_set read_fds;
- struct timeval tv;
- int fd_max;
-
- /* used in accept() */
- int retval;
-
- #ifndef _WIN32
- if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
- ERROR("couldn't set SIGPIPE to SIG_IGN");
- #endif
-
- /* do regular tasks after at most 10ms */
- tv.tv_sec = 0;
- tv.tv_usec = 10000;
-
- while(!shutdown_openocd)
- {
- /* monitor sockets for acitvity */
- fd_max = 0;
- FD_ZERO(&read_fds);
-
- /* add service and connection fds to read_fds */
- for (service = services; service; service = service->next)
- {
- if (service->fd != -1)
- {
- /* listen for new connections */
- FD_SET(service->fd, &read_fds);
-
- if (service->fd > fd_max)
- fd_max = service->fd;
- }
-
- if (service->connections)
- {
- connection_t *c;
-
- for (c = service->connections; c; c = c->next)
- {
- /* check for activity on the connection */
- FD_SET(c->fd, &read_fds);
- if (c->fd > fd_max)
- fd_max = c->fd;
- }
- }
- }
-
- #ifndef _WIN32
- /* add STDIN to read_fds */
- FD_SET(fileno(stdin), &read_fds);
- #endif
-
- if ((retval = select(fd_max + 1, &read_fds, NULL, NULL, &tv)) == -1)
- {
- #ifdef _WIN32
-
- errno = WSAGetLastError();
-
- if (errno == WSAEINTR)
- FD_ZERO(&read_fds);
- else
- {
- ERROR("error during select: %d", strerror(errno));
- exit(-1);
- }
- #else
-
- if (errno == EINTR)
- FD_ZERO(&read_fds);
- else
- {
- ERROR("error during select: %s", strerror(errno));
- exit(-1);
- }
- #endif
- }
-
- target_call_timer_callbacks();
-
- if (retval == 0)
- {
- /* do regular tasks after at most 100ms */
- tv.tv_sec = 0;
- tv.tv_usec = 10000;
-
- #if 0
- if (shutdown_openocd)
- return ERROR_COMMAND_CLOSE_CONNECTION;
-
- handle_target();
- #endif
- }
-
- for (service = services; service; service = service->next)
- {
- /* handle new connections on listeners */
- if ((service->fd != -1)
- && (FD_ISSET(service->fd, &read_fds)))
- {
- if (service->max_connections > 0)
- add_connection(service, command_context);
- else
- {
- struct sockaddr_in sin;
- unsigned int address_size = sizeof(sin);
- int tmp_fd;
- tmp_fd = accept(service->fd, (struct sockaddr *)&service->sin, &address_size);
- close_socket(tmp_fd);
- INFO("rejected '%s' connection, no more connections allowed", service->name);
- }
- }
-
- /* handle activity on connections */
- if (service->connections)
- {
- connection_t *c;
-
- for (c = service->connections; c;)
- {
- if ((FD_ISSET(c->fd, &read_fds)) || c->input_pending)
- {
- if (service->input(c) != ERROR_OK)
- {
- connection_t *next = c->next;
- remove_connection(service, c);
- INFO("dropped '%s' connection", service->name);
- c = next;
- continue;
- }
- }
- c = c->next;
- }
- }
- }
-
- #ifndef _WIN32
- if (FD_ISSET(fileno(stdin), &read_fds))
- {
- if (getc(stdin) == 'x')
- {
- shutdown_openocd = 1;
- }
- }
- #endif
- }
-
- return ERROR_OK;
- }
-
- #ifdef _WIN32
- BOOL WINAPI ControlHandler(DWORD dwCtrlType)
- {
- shutdown_openocd = 1;
- return TRUE;
- }
- #endif
-
- int server_init()
- {
- #ifdef _WIN32
- WORD wVersionRequested;
- WSADATA wsaData;
-
- wVersionRequested = MAKEWORD( 2, 2 );
-
- if (WSAStartup(wVersionRequested, &wsaData) != 0)
- {
- ERROR("Failed to Open Winsock");
- exit(-1);
- }
-
- SetConsoleCtrlHandler( ControlHandler, TRUE );
- #endif
-
-
- return ERROR_OK;
- }
-
- int server_close()
- {
- remove_services();
-
- #ifdef _WIN32
- WSACleanup();
- SetConsoleCtrlHandler( ControlHandler, FALSE );
- #endif
-
- return ERROR_OK;
- }
-
- int server_register_commands(command_context_t *context)
- {
- register_command(context, NULL, "shutdown", handle_shutdown_command,
- COMMAND_ANY, "shut the server down");
-
- return ERROR_OK;
- }
-
- /* tell the server we want to shut down */
- int handle_shutdown_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
- {
- shutdown_openocd = 1;
-
- return ERROR_COMMAND_CLOSE_CONNECTION;
- }
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