575 lines
13 KiB
C
575 lines
13 KiB
C
/***************************************************************************
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* Copyright (C) 2005 by Dominic Rath *
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* Dominic.Rath@gmx.de *
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* *
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* Copyright (C) 2007,2008 Øyvind Harboe *
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* oyvind.harboe@zylin.com *
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* *
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* Copyright (C) 2008 by Spencer Oliver *
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* spen@spen-soft.co.uk *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "server.h"
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#include "target.h"
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#include "openocd.h"
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#include <signal.h>
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#ifndef _WIN32
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#include <netinet/tcp.h>
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#endif
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struct service *services = NULL;
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/* shutdown_openocd == 1: exit the main event loop, and quit the debugger */
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static int shutdown_openocd = 0;
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/* set when using pipes rather than tcp */
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int server_use_pipes = 0;
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int add_connection(struct service *service, struct command_context *cmd_ctx)
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{
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socklen_t address_size;
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struct connection *c, **p;
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int retval;
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int flag = 1;
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c = malloc(sizeof(struct connection));
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c->fd = -1;
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memset(&c->sin, 0, sizeof(c->sin));
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c->cmd_ctx = copy_command_context(cmd_ctx);
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c->service = service;
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c->input_pending = 0;
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c->priv = NULL;
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c->next = NULL;
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if (service->type == CONNECTION_TCP)
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{
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address_size = sizeof(c->sin);
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c->fd = accept(service->fd, (struct sockaddr *)&service->sin, &address_size);
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/* This increases performance dramatically for e.g. GDB load which
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* does not have a sliding window protocol. */
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retval = setsockopt(c->fd, /* socket affected */
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IPPROTO_TCP, /* set option at TCP level */
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TCP_NODELAY, /* name of option */
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(char *)&flag, /* the cast is historical cruft */
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sizeof(int)); /* length of option value */
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LOG_INFO("accepting '%s' connection from %i", service->name, c->sin.sin_port);
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if ((retval = service->new_connection(c)) != ERROR_OK)
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{
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close_socket(c->fd);
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LOG_ERROR("attempted '%s' connection rejected", service->name);
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free(c);
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return retval;
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}
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}
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else if (service->type == CONNECTION_PIPE)
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{
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c->fd = service->fd;
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/* do not check for new connections again on stdin */
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service->fd = -1;
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LOG_INFO("accepting '%s' connection from pipe", service->name);
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if ((retval = service->new_connection(c)) != ERROR_OK)
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{
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LOG_ERROR("attempted '%s' connection rejected", service->name);
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free(c);
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return retval;
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}
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}
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/* add to the end of linked list */
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for (p = &service->connections; *p; p = &(*p)->next);
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*p = c;
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service->max_connections--;
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return ERROR_OK;
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}
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int remove_connection(struct service *service, struct connection *connection)
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{
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struct connection **p = &service->connections;
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struct connection *c;
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/* find connection */
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while ((c = *p))
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{
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if (c->fd == connection->fd)
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{
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service->connection_closed(c);
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if (service->type == CONNECTION_TCP)
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close_socket(c->fd);
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command_done(c->cmd_ctx);
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/* delete connection */
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*p = c->next;
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free(c);
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service->max_connections++;
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break;
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}
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/* redirect p to next list pointer */
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p = &(*p)->next;
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}
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return ERROR_OK;
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}
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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)
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{
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struct service *c, **p;
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int so_reuseaddr_option = 1;
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c = malloc(sizeof(struct service));
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c->name = strdup(name);
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c->type = type;
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c->port = port;
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c->max_connections = max_connections;
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c->fd = -1;
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c->connections = NULL;
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c->new_connection = new_connection_handler;
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c->input = input_handler;
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c->connection_closed = connection_closed_handler;
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c->priv = priv;
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c->next = NULL;
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if (type == CONNECTION_TCP)
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{
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if ((c->fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
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{
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LOG_ERROR("error creating socket: %s", strerror(errno));
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exit(-1);
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}
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setsockopt(c->fd, SOL_SOCKET, SO_REUSEADDR, (void*)&so_reuseaddr_option, sizeof(int));
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socket_nonblock(c->fd);
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memset(&c->sin, 0, sizeof(c->sin));
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c->sin.sin_family = AF_INET;
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c->sin.sin_addr.s_addr = INADDR_ANY;
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c->sin.sin_port = htons(port);
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if (bind(c->fd, (struct sockaddr *)&c->sin, sizeof(c->sin)) == -1)
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{
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LOG_ERROR("couldn't bind to socket: %s", strerror(errno));
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exit(-1);
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}
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#ifndef _WIN32
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int segsize = 65536;
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setsockopt(c->fd, IPPROTO_TCP, TCP_MAXSEG, &segsize, sizeof(int));
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#endif
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int window_size = 128 * 1024;
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/* These setsockopt()s must happen before the listen() */
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setsockopt(c->fd, SOL_SOCKET, SO_SNDBUF,
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(char *)&window_size, sizeof(window_size));
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setsockopt(c->fd, SOL_SOCKET, SO_RCVBUF,
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(char *)&window_size, sizeof(window_size));
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if (listen(c->fd, 1) == -1)
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{
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LOG_ERROR("couldn't listen on socket: %s", strerror(errno));
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exit(-1);
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}
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}
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else if (type == CONNECTION_PIPE)
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{
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/* use stdin */
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c->fd = STDIN_FILENO;
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#ifdef _WIN32
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/* for win32 set stdin/stdout to binary mode */
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if (_setmode(_fileno(stdout), _O_BINARY) < 0)
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LOG_WARNING("cannot change stdout mode to binary");
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if (_setmode(_fileno(stdin), _O_BINARY) < 0)
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LOG_WARNING("cannot change stdin mode to binary");
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if (_setmode(_fileno(stderr), _O_BINARY) < 0)
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LOG_WARNING("cannot change stderr mode to binary");
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#else
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socket_nonblock(c->fd);
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#endif
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}
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else
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{
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LOG_ERROR("unknown connection type: %d", type);
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exit(1);
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}
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/* add to the end of linked list */
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for (p = &services; *p; p = &(*p)->next);
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*p = c;
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return ERROR_OK;
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}
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int remove_service(unsigned short port)
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{
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struct service **p = &services;
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struct service *c;
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/* find service */
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while ((c = *p))
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{
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if (c->port == port)
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{
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if (c->name)
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free(c->name);
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if (c->priv)
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free(c->priv);
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/* delete service */
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*p = c->next;
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free(c);
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}
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/* redirect p to next list pointer */
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p = &(*p)->next;
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}
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return ERROR_OK;
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}
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int remove_services(void)
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{
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struct service *c = services;
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/* loop service */
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while (c)
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{
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struct service *next = c->next;
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if (c->name)
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free(c->name);
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if (c->priv)
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free(c->priv);
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/* delete service */
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free(c);
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/* remember the last service for unlinking */
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c = next;
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}
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services = NULL;
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return ERROR_OK;
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}
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int server_loop(struct command_context *command_context)
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{
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struct service *service;
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/* used in select() */
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fd_set read_fds;
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struct timeval tv;
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int fd_max;
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/* used in accept() */
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int retval;
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#ifndef _WIN32
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if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
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LOG_ERROR("couldn't set SIGPIPE to SIG_IGN");
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#endif
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/* do regular tasks after at most 10ms */
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tv.tv_sec = 0;
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tv.tv_usec = 10000;
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while (!shutdown_openocd)
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{
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/* monitor sockets for activity */
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fd_max = 0;
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FD_ZERO(&read_fds);
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/* add service and connection fds to read_fds */
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for (service = services; service; service = service->next)
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{
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if (service->fd != -1)
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{
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/* listen for new connections */
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FD_SET(service->fd, &read_fds);
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if (service->fd > fd_max)
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fd_max = service->fd;
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}
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if (service->connections)
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{
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struct connection *c;
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for (c = service->connections; c; c = c->next)
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{
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/* check for activity on the connection */
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FD_SET(c->fd, &read_fds);
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if (c->fd > fd_max)
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fd_max = c->fd;
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}
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}
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}
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#ifndef _WIN32
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#if BUILD_ECOSBOARD == 0
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if (server_use_pipes == 0)
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{
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/* add STDIN to read_fds */
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FD_SET(fileno(stdin), &read_fds);
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}
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#endif
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#endif
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openocd_sleep_prelude();
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kept_alive();
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/* Only while we're sleeping we'll let others run */
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retval = socket_select(fd_max + 1, &read_fds, NULL, NULL, &tv);
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openocd_sleep_postlude();
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if (retval == -1)
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{
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#ifdef _WIN32
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errno = WSAGetLastError();
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if (errno == WSAEINTR)
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FD_ZERO(&read_fds);
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else
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{
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LOG_ERROR("error during select: %s", strerror(errno));
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exit(-1);
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}
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#else
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if (errno == EINTR)
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{
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FD_ZERO(&read_fds);
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}
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else
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{
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LOG_ERROR("error during select: %s", strerror(errno));
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exit(-1);
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}
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#endif
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}
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target_call_timer_callbacks();
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process_jim_events ();
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if (retval == 0)
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{
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/* do regular tasks after at most 100ms */
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tv.tv_sec = 0;
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tv.tv_usec = 10000;
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FD_ZERO(&read_fds); /* eCos leaves read_fds unchanged in this case! */
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}
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for (service = services; service; service = service->next)
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{
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/* handle new connections on listeners */
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if ((service->fd != -1)
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&& (FD_ISSET(service->fd, &read_fds)))
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{
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if (service->max_connections > 0)
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{
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add_connection(service, command_context);
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}
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else
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{
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if (service->type != CONNECTION_PIPE)
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{
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struct sockaddr_in sin;
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socklen_t address_size = sizeof(sin);
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int tmp_fd;
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tmp_fd = accept(service->fd, (struct sockaddr *)&service->sin, &address_size);
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close_socket(tmp_fd);
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}
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LOG_INFO("rejected '%s' connection, no more connections allowed", service->name);
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}
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}
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/* handle activity on connections */
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if (service->connections)
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{
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struct connection *c;
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for (c = service->connections; c;)
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{
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if ((FD_ISSET(c->fd, &read_fds)) || c->input_pending)
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{
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if ((retval = service->input(c)) != ERROR_OK)
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{
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struct connection *next = c->next;
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if (service->type == CONNECTION_PIPE)
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{
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/* if connection uses a pipe then shutdown openocd on error */
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shutdown_openocd = 1;
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}
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remove_connection(service, c);
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LOG_INFO("dropped '%s' connection - error %d", service->name, retval);
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c = next;
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continue;
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}
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}
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c = c->next;
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}
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}
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}
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#ifndef _WIN32
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#if BUILD_ECOSBOARD == 0
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/* check for data on stdin if not using pipes */
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if (server_use_pipes == 0)
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{
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if (FD_ISSET(fileno(stdin), &read_fds))
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{
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if (getc(stdin) == 'x')
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{
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shutdown_openocd = 1;
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}
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}
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}
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#endif
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#else
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MSG msg;
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while (PeekMessage(&msg,NULL,0,0,PM_REMOVE))
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{
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if (msg.message == WM_QUIT)
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shutdown_openocd = 1;
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}
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#endif
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}
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return ERROR_OK;
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}
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#ifdef _WIN32
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BOOL WINAPI ControlHandler(DWORD dwCtrlType)
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{
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shutdown_openocd = 1;
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return TRUE;
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}
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void sig_handler(int sig) {
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shutdown_openocd = 1;
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}
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#endif
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int server_init(void)
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{
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#ifdef _WIN32
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WORD wVersionRequested;
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WSADATA wsaData;
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wVersionRequested = MAKEWORD(2, 2);
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if (WSAStartup(wVersionRequested, &wsaData) != 0)
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{
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LOG_ERROR("Failed to Open Winsock");
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exit(-1);
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}
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if (server_use_pipes == 0)
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{
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/* register ctrl-c handler */
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SetConsoleCtrlHandler(ControlHandler, TRUE);
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}
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else
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{
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/* we are using pipes so ignore ctrl-c */
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SetConsoleCtrlHandler(NULL, TRUE);
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}
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signal(SIGINT, sig_handler);
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signal(SIGTERM, sig_handler);
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signal(SIGBREAK, sig_handler);
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signal(SIGABRT, sig_handler);
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#endif
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return ERROR_OK;
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}
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int server_quit(void)
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{
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remove_services();
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#ifdef _WIN32
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WSACleanup();
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SetConsoleCtrlHandler(ControlHandler, FALSE);
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#endif
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return ERROR_OK;
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}
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/* tell the server we want to shut down */
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COMMAND_HANDLER(handle_shutdown_command)
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{
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shutdown_openocd = 1;
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return ERROR_COMMAND_CLOSE_CONNECTION;
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}
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static const struct command_registration server_command_handlers[] = {
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{
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.name = "shutdown",
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.handler = &handle_shutdown_command,
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.mode = COMMAND_ANY,
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.help = "shut the server down",
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},
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COMMAND_REGISTRATION_DONE
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};
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int server_register_commands(struct command_context *cmd_ctx)
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{
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return register_commands(cmd_ctx, NULL, server_command_handlers);
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}
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SERVER_PORT_COMMAND()
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{
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switch (CMD_ARGC) {
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case 0:
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command_print(CMD_CTX, "%d", *out);
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break;
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case 1:
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{
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uint16_t port;
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COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], port);
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*out = port;
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break;
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}
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default:
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return ERROR_INVALID_ARGUMENTS;
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}
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return ERROR_OK;
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}
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