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/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *

ntfreak
committed
* Copyright (C) 2007,2008 yvind Harboe *

oharboe
committed
* oyvind.harboe@zylin.com *
* *

ntfreak
committed
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
* *
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* 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>
#ifndef _WIN32
#include <netinet/tcp.h>
#endif
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);
/* This increases performance dramatically for e.g. GDB load which
* does not have a sliding window protocol. */
retval=setsockopt(c->fd, /* socket affected */
IPPROTO_TCP, /* set option at TCP level */
TCP_NODELAY, /* name of option */
(char *)&flag, /* the cast is historical cruft */
sizeof(int)); /* length of option value */
LOG_INFO("accepting '%s' connection from %i", service->name, c->sin.sin_port);
if ((retval = service->new_connection(c)) == ERROR_OK)
{
}
else
{
close_socket(c->fd);
LOG_ERROR("attempted '%s' connection rejected", service->name);
}
/* add to the end of linked list */
for (p = &service->connections; *p; p = &(*p)->next);
*p = c;
service->max_connections--;
return ERROR_OK;
}
int remove_connection(service_t *service, connection_t *connection)
{
connection_t **p = &service->connections;
connection_t *c;
/* find connection */
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{
if (c->fd == connection->fd)
{
service->connection_closed(c);
close_socket(c->fd);
command_done(c->cmd_ctx);
/* delete connection */
*p = c->next;
free(c);
service->max_connections++;
break;
}
/* redirect p to next list pointer */
p = &(*p)->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)
{
LOG_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)
{
LOG_ERROR("couldn't bind to socket: %s", strerror(errno));
#ifndef _WIN32
int segsize=65536;
setsockopt(c->fd, IPPROTO_TCP, TCP_MAXSEG, &segsize, sizeof(int));
#endif
int window_size = 128 * 1024;
/* These setsockopt()s must happen before the listen() */
setsockopt(c->fd, SOL_SOCKET, SO_SNDBUF,
(char *)&window_size, sizeof(window_size));
setsockopt(c->fd, SOL_SOCKET, SO_RCVBUF,
(char *)&window_size, sizeof(window_size));
LOG_ERROR("couldn't listen on socket: %s", strerror(errno));
exit(-1);
}
/* add to the end of linked list */
for (p = &services; *p; p = &(*p)->next);
*p = c;
return ERROR_OK;
}
int remove_service(unsigned short port)
{
service_t **p = &services;
service_t *c;
/* find service */
{
if (c->port == port)
{
if (c->name)
free(c->name);
if (c->priv)
free(c->priv);
/* delete service */
*p = c->next;
free(c);
}
/* redirect p to next list pointer */
p = &(*p)->next;
}
return ERROR_OK;
}
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{
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;
}
services = NULL;
return ERROR_OK;
}
extern void openocd_sleep_prelude(void);
extern void openocd_sleep_postlude(void);
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)
LOG_ERROR("couldn't set SIGPIPE to SIG_IGN");
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/* 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);
openocd_sleep_prelude();
kept_alive();
// Only while we're sleeping we'll let others run
retval = select(fd_max + 1, &read_fds, NULL, NULL, &tv);
openocd_sleep_postlude();
if (retval == -1)
{
#ifdef _WIN32
errno = WSAGetLastError();
if (errno == WSAEINTR)
FD_ZERO(&read_fds);
else
{
LOG_ERROR("error during select: %s", strerror(errno));
exit(-1);
}
#else
if (errno == EINTR)
{
FD_ZERO(&read_fds);
}
else
{
LOG_ERROR("error during select: %s", strerror(errno));
exit(-1);
}
#endif
}
target_call_timer_callbacks();
process_jim_events ();
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if (retval == 0)
{
/* do regular tasks after at most 100ms */
tv.tv_sec = 0;
tv.tv_usec = 10000;
FD_ZERO(&read_fds); /* eCos leaves read_fds unchanged in this case! */
}
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);
LOG_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);
LOG_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;
}
}
#else
MSG msg;
while (PeekMessage(&msg,NULL,0,0,PM_REMOVE))
{
if (msg.message == WM_QUIT)
shutdown_openocd = 1;
}
#endif
}
return ERROR_OK;
}
#ifdef _WIN32
BOOL WINAPI ControlHandler(DWORD dwCtrlType)
{
shutdown_openocd = 1;
return TRUE;
shutdown_openocd = 1;
{
#ifdef _WIN32
WORD wVersionRequested;
WSADATA wsaData;
wVersionRequested = MAKEWORD( 2, 2 );
if (WSAStartup(wVersionRequested, &wsaData) != 0)
{
LOG_ERROR("Failed to Open Winsock");
exit(-1);
}
SetConsoleCtrlHandler( ControlHandler, TRUE );
signal(SIGINT, sig_handler);
signal(SIGTERM, sig_handler);
signal(SIGBREAK, sig_handler);
signal(SIGABRT, sig_handler);
#endif
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{
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;
}