1 /***************************************************************************
2 * Copyright (C) 2014 by Franck Jullien *
3 * franck.jullien@gmail.com *
5 * Based on ./src/server/telnet_server.c *
7 * This program is free software; you can redistribute it and/or modify *
8 * it under the terms of the GNU General Public License as published by *
9 * the Free Software Foundation; either version 2 of the License, or *
10 * (at your option) any later version. *
12 * This program is distributed in the hope that it will be useful, *
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
15 * GNU General Public License for more details. *
17 * You should have received a copy of the GNU General Public License *
18 * along with this program; if not, write to the *
19 * Free Software Foundation, Inc., *
20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
21 ***************************************************************************/
27 #include <server/telnet_server.h>
31 #include "jsp_server.h"
33 static char *jsp_port
;
35 /**A skim of the relevant RFCs suggests that if my application simply sent the
36 * characters IAC DONT LINEMODE (\377\376\042) as soon as the client connects,
37 * the client should be forced into character mode. However it doesn't make any difference.
40 static char *negotiate
=
41 "\xFF\xFB\x03" /* IAC WILL Suppress Go Ahead */
42 "\xFF\xFB\x01" /* IAC WILL Echo */
43 "\xFF\xFD\x03" /* IAC DO Suppress Go Ahead */
44 "\xFF\xFE\x01"; /* IAC DON'T Echo */
46 /* The only way we can detect that the socket is closed is the first time
47 * we write to it, we will fail. Subsequent write operations will
50 static int telnet_write(struct connection
*connection
, const void *data
, int len
)
52 struct telnet_connection
*t_con
= connection
->priv
;
54 return ERROR_SERVER_REMOTE_CLOSED
;
56 if (connection_write(connection
, data
, len
) == len
)
59 return ERROR_SERVER_REMOTE_CLOSED
;
62 int jsp_poll_read(void *priv
)
64 struct jsp_service
*jsp_service
= (struct jsp_service
*)priv
;
65 unsigned char out_buffer
[10];
66 unsigned char in_buffer
[10];
70 if (!jsp_service
->connection
)
73 memset(out_buffer
, 0, 10);
75 or1k_adv_jtag_jsp_xfer(jsp_service
->jtag_info
, &out_len
, out_buffer
, &in_len
, in_buffer
);
77 telnet_write(jsp_service
->connection
, in_buffer
, in_len
);
82 static int jsp_new_connection(struct connection
*connection
)
84 struct telnet_connection
*telnet_connection
= malloc(sizeof(struct telnet_connection
));
85 struct jsp_service
*jsp_service
= connection
->service
->priv
;
87 connection
->priv
= telnet_connection
;
89 /* initialize telnet connection information */
90 telnet_connection
->closed
= 0;
91 telnet_connection
->line_size
= 0;
92 telnet_connection
->line_cursor
= 0;
93 telnet_connection
->option_size
= 0;
94 telnet_connection
->state
= TELNET_STATE_DATA
;
96 /* negotiate telnet options */
97 telnet_write(connection
, negotiate
, strlen(negotiate
));
99 /* print connection banner */
100 if (jsp_service
->banner
) {
101 telnet_write(connection
, jsp_service
->banner
, strlen(jsp_service
->banner
));
102 telnet_write(connection
, "\r\n", 2);
105 jsp_service
->connection
= connection
;
107 int retval
= target_register_timer_callback(&jsp_poll_read
, 1, 1, jsp_service
);
108 if (ERROR_OK
!= retval
)
114 static int jsp_input(struct connection
*connection
)
117 unsigned char buffer
[TELNET_BUFFER_SIZE
];
118 unsigned char *buf_p
;
119 struct telnet_connection
*t_con
= connection
->priv
;
120 struct jsp_service
*jsp_service
= connection
->service
->priv
;
122 bytes_read
= connection_read(connection
, buffer
, TELNET_BUFFER_SIZE
);
125 return ERROR_SERVER_REMOTE_CLOSED
;
126 else if (bytes_read
== -1) {
127 LOG_ERROR("error during read: %s", strerror(errno
));
128 return ERROR_SERVER_REMOTE_CLOSED
;
133 switch (t_con
->state
) {
134 case TELNET_STATE_DATA
:
136 t_con
->state
= TELNET_STATE_IAC
;
140 unsigned char in_buffer
[10];
141 or1k_adv_jtag_jsp_xfer(jsp_service
->jtag_info
,
142 &out_len
, buf_p
, &in_len
,
145 telnet_write(connection
,
149 case TELNET_STATE_IAC
:
152 t_con
->state
= TELNET_STATE_DONT
;
155 t_con
->state
= TELNET_STATE_DO
;
158 t_con
->state
= TELNET_STATE_WONT
;
161 t_con
->state
= TELNET_STATE_WILL
;
165 case TELNET_STATE_SB
:
167 case TELNET_STATE_SE
:
169 case TELNET_STATE_WILL
:
170 case TELNET_STATE_WONT
:
171 case TELNET_STATE_DO
:
172 case TELNET_STATE_DONT
:
173 t_con
->state
= TELNET_STATE_DATA
;
176 LOG_ERROR("unknown telnet state");
187 static int jsp_connection_closed(struct connection
*connection
)
189 struct telnet_connection
*t_con
= connection
->priv
;
190 struct jsp_service
*jsp_service
= connection
->service
->priv
;
194 t_con
->prompt
= NULL
;
197 int retval
= target_unregister_timer_callback(&jsp_poll_read
, jsp_service
);
198 if (ERROR_OK
!= retval
)
201 if (connection
->priv
) {
202 free(connection
->priv
);
203 connection
->priv
= NULL
;
205 LOG_ERROR("BUG: connection->priv == NULL");
210 int jsp_init(struct or1k_jtag
*jtag_info
, char *banner
)
212 struct jsp_service
*jsp_service
= malloc(sizeof(struct jsp_service
));
213 jsp_service
->banner
= banner
;
214 jsp_service
->jtag_info
= jtag_info
;
216 return add_service("jsp",
221 jsp_connection_closed
,
225 COMMAND_HANDLER(handle_jsp_port_command
)
227 return CALL_COMMAND_HANDLER(server_pipe_command
, &jsp_port
);
230 static const struct command_registration jsp_command_handlers
[] = {
233 .handler
= handle_jsp_port_command
,
235 .help
= "Specify port on which to listen "
236 "for incoming JSP telnet connections.",
237 .usage
= "[port_num]",
239 COMMAND_REGISTRATION_DONE
242 int jsp_register_commands(struct command_context
*cmd_ctx
)
244 jsp_port
= strdup("7777");
245 return register_commands(cmd_ctx
, NULL
, jsp_command_handlers
);
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