243 lines
7.0 KiB
C
243 lines
7.0 KiB
C
/***************************************************************************
|
|
* Copyright (C) 2014 by Franck Jullien *
|
|
* franck.jullien@gmail.com *
|
|
* *
|
|
* Based on ./src/server/telnet_server.c *
|
|
* *
|
|
* 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, see <http://www.gnu.org/licenses/>. *
|
|
***************************************************************************/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <server/telnet_server.h>
|
|
|
|
#include "or1k_tap.h"
|
|
#include "or1k_du.h"
|
|
#include "jsp_server.h"
|
|
|
|
static char *jsp_port;
|
|
|
|
/**A skim of the relevant RFCs suggests that if my application simply sent the
|
|
* characters IAC DONT LINEMODE (\377\376\042) as soon as the client connects,
|
|
* the client should be forced into character mode. However it doesn't make any difference.
|
|
*/
|
|
|
|
static const char * const negotiate =
|
|
"\xFF\xFB\x03" /* IAC WILL Suppress Go Ahead */
|
|
"\xFF\xFB\x01" /* IAC WILL Echo */
|
|
"\xFF\xFD\x03" /* IAC DO Suppress Go Ahead */
|
|
"\xFF\xFE\x01"; /* IAC DON'T Echo */
|
|
|
|
/* The only way we can detect that the socket is closed is the first time
|
|
* we write to it, we will fail. Subsequent write operations will
|
|
* succeed. Shudder!
|
|
*/
|
|
static int telnet_write(struct connection *connection, const void *data, int len)
|
|
{
|
|
struct telnet_connection *t_con = connection->priv;
|
|
if (t_con->closed)
|
|
return ERROR_SERVER_REMOTE_CLOSED;
|
|
|
|
if (connection_write(connection, data, len) == len)
|
|
return ERROR_OK;
|
|
t_con->closed = 1;
|
|
return ERROR_SERVER_REMOTE_CLOSED;
|
|
}
|
|
|
|
static int jsp_poll_read(void *priv)
|
|
{
|
|
struct jsp_service *jsp_service = (struct jsp_service *)priv;
|
|
unsigned char out_buffer[10];
|
|
unsigned char in_buffer[10];
|
|
int out_len = 0;
|
|
int in_len;
|
|
|
|
if (!jsp_service->connection)
|
|
return ERROR_FAIL;
|
|
|
|
memset(out_buffer, 0, 10);
|
|
|
|
or1k_adv_jtag_jsp_xfer(jsp_service->jtag_info, &out_len, out_buffer, &in_len, in_buffer);
|
|
if (in_len)
|
|
telnet_write(jsp_service->connection, in_buffer, in_len);
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
static int jsp_new_connection(struct connection *connection)
|
|
{
|
|
struct telnet_connection *telnet_connection = malloc(sizeof(struct telnet_connection));
|
|
struct jsp_service *jsp_service = connection->service->priv;
|
|
|
|
connection->priv = telnet_connection;
|
|
|
|
/* initialize telnet connection information */
|
|
telnet_connection->closed = 0;
|
|
telnet_connection->line_size = 0;
|
|
telnet_connection->line_cursor = 0;
|
|
telnet_connection->state = TELNET_STATE_DATA;
|
|
|
|
/* negotiate telnet options */
|
|
telnet_write(connection, negotiate, strlen(negotiate));
|
|
|
|
/* print connection banner */
|
|
if (jsp_service->banner) {
|
|
telnet_write(connection, jsp_service->banner, strlen(jsp_service->banner));
|
|
telnet_write(connection, "\r\n", 2);
|
|
}
|
|
|
|
jsp_service->connection = connection;
|
|
|
|
int retval = target_register_timer_callback(&jsp_poll_read, 1,
|
|
TARGET_TIMER_TYPE_PERIODIC, jsp_service);
|
|
if (retval != ERROR_OK)
|
|
return retval;
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
static int jsp_input(struct connection *connection)
|
|
{
|
|
int bytes_read;
|
|
unsigned char buffer[TELNET_BUFFER_SIZE];
|
|
unsigned char *buf_p;
|
|
struct telnet_connection *t_con = connection->priv;
|
|
struct jsp_service *jsp_service = connection->service->priv;
|
|
|
|
bytes_read = connection_read(connection, buffer, TELNET_BUFFER_SIZE);
|
|
|
|
if (bytes_read == 0)
|
|
return ERROR_SERVER_REMOTE_CLOSED;
|
|
else if (bytes_read == -1) {
|
|
LOG_ERROR("error during read: %s", strerror(errno));
|
|
return ERROR_SERVER_REMOTE_CLOSED;
|
|
}
|
|
|
|
buf_p = buffer;
|
|
while (bytes_read) {
|
|
switch (t_con->state) {
|
|
case TELNET_STATE_DATA:
|
|
if (*buf_p == 0xff)
|
|
t_con->state = TELNET_STATE_IAC;
|
|
else {
|
|
int out_len = 1;
|
|
int in_len;
|
|
unsigned char in_buffer[10];
|
|
or1k_adv_jtag_jsp_xfer(jsp_service->jtag_info,
|
|
&out_len, buf_p, &in_len,
|
|
in_buffer);
|
|
if (in_len)
|
|
telnet_write(connection,
|
|
in_buffer, in_len);
|
|
}
|
|
break;
|
|
case TELNET_STATE_IAC:
|
|
switch (*buf_p) {
|
|
case 0xfe:
|
|
t_con->state = TELNET_STATE_DONT;
|
|
break;
|
|
case 0xfd:
|
|
t_con->state = TELNET_STATE_DO;
|
|
break;
|
|
case 0xfc:
|
|
t_con->state = TELNET_STATE_WONT;
|
|
break;
|
|
case 0xfb:
|
|
t_con->state = TELNET_STATE_WILL;
|
|
break;
|
|
}
|
|
break;
|
|
case TELNET_STATE_SB:
|
|
break;
|
|
case TELNET_STATE_SE:
|
|
break;
|
|
case TELNET_STATE_WILL:
|
|
case TELNET_STATE_WONT:
|
|
case TELNET_STATE_DO:
|
|
case TELNET_STATE_DONT:
|
|
t_con->state = TELNET_STATE_DATA;
|
|
break;
|
|
default:
|
|
LOG_ERROR("unknown telnet state");
|
|
exit(-1);
|
|
}
|
|
|
|
bytes_read--;
|
|
buf_p++;
|
|
}
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
static int jsp_connection_closed(struct connection *connection)
|
|
{
|
|
struct jsp_service *jsp_service = connection->service->priv;
|
|
|
|
int retval = target_unregister_timer_callback(&jsp_poll_read, jsp_service);
|
|
if (retval != ERROR_OK)
|
|
return retval;
|
|
|
|
free(connection->priv);
|
|
connection->priv = NULL;
|
|
return ERROR_OK;
|
|
}
|
|
|
|
static const struct service_driver jsp_service_driver = {
|
|
.name = "jsp",
|
|
.new_connection_during_keep_alive_handler = NULL,
|
|
.new_connection_handler = jsp_new_connection,
|
|
.input_handler = jsp_input,
|
|
.connection_closed_handler = jsp_connection_closed,
|
|
.keep_client_alive_handler = NULL,
|
|
};
|
|
|
|
int jsp_init(struct or1k_jtag *jtag_info, char *banner)
|
|
{
|
|
struct jsp_service *jsp_service = malloc(sizeof(struct jsp_service));
|
|
jsp_service->banner = banner;
|
|
jsp_service->jtag_info = jtag_info;
|
|
|
|
return add_service(&jsp_service_driver, jsp_port, 1, jsp_service);
|
|
}
|
|
|
|
COMMAND_HANDLER(handle_jsp_port_command)
|
|
{
|
|
return CALL_COMMAND_HANDLER(server_pipe_command, &jsp_port);
|
|
}
|
|
|
|
static const struct command_registration jsp_command_handlers[] = {
|
|
{
|
|
.name = "jsp_port",
|
|
.handler = handle_jsp_port_command,
|
|
.mode = COMMAND_ANY,
|
|
.help = "Specify port on which to listen "
|
|
"for incoming JSP telnet connections.",
|
|
.usage = "[port_num]",
|
|
},
|
|
COMMAND_REGISTRATION_DONE
|
|
};
|
|
|
|
int jsp_register_commands(struct command_context *cmd_ctx)
|
|
{
|
|
jsp_port = strdup("7777");
|
|
return register_commands(cmd_ctx, NULL, jsp_command_handlers);
|
|
}
|
|
|
|
void jsp_service_free(void)
|
|
{
|
|
free(jsp_port);
|
|
}
|