1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
/***************************************************************************
* Copyright (C) 2008 *
* *
* 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 <stdarg.h>
#include "tcl_server.h"
#include "jim.h"
#include "log.h"
#include "command.h"
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <ctype.h>
#define TCL_SERVER_VERSION "TCL Server 0.1"
#define TCL_MAX_LINE (4096)
typedef struct tcl_connection_s {
int tc_linedrop;
int tc_lineoffset;
char tc_line[TCL_MAX_LINE];
int tc_outerror; /* flag an output error */
} tcl_connection_t;
extern Jim_Interp *interp;
static unsigned short tcl_port = 0;
/* commands */
static int handle_tcl_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
/* handlers */
static int tcl_new_connection(connection_t *connection);
static int tcl_input(connection_t *connection);
static int tcl_output(connection_t *connection, const void *buf, ssize_t len);
static int tcl_closed(connection_t *connection);
/* write data out to a socket.
*
* this is a blocking write, so the return value must equal the length, if
* that is not the case then flag the connection with an output error.
*/
int tcl_output(connection_t *connection, const void *data, ssize_t len)
{
ssize_t wlen;
tcl_connection_t *tclc;
tclc = connection->priv;
if (tclc->tc_outerror)
return ERROR_SERVER_REMOTE_CLOSED;
wlen = write_socket(connection->fd, data, len);
if (wlen == len)
return ERROR_OK;
LOG_ERROR("error during write: %d != %d", (int)wlen, (int)len);
tclc->tc_outerror = 1;
return ERROR_SERVER_REMOTE_CLOSED;
}
/* connections */
static int tcl_new_connection(connection_t *connection)
{
tcl_connection_t *tclc;
tclc = malloc(sizeof(tcl_connection_t));
if (tclc == NULL)
return ERROR_CONNECTION_REJECTED;
memset(tclc, 0, sizeof(tcl_connection_t));
connection->priv = tclc;
return ERROR_OK;
}
static int tcl_input(connection_t *connection)
{
int retval;
int i;
ssize_t rlen;
const char *result;
int reslen;
tcl_connection_t *tclc;
char in[256];
rlen = read_socket(connection->fd, &in, sizeof(in));
if (rlen <= 0) {
if (rlen < 0)
LOG_ERROR("error during read: %s", strerror(errno));
return ERROR_SERVER_REMOTE_CLOSED;
}
tclc = connection->priv;
if (tclc == NULL)
return ERROR_CONNECTION_REJECTED;
/* push as much data into the line as possible */
for (i = 0; i < rlen; i++)
{
if (!isprint(in[i]) && !isspace(in[i]))
{
/* drop this line */
tclc->tc_linedrop = 1;
continue;
}
/* buffer the data */
tclc->tc_line[tclc->tc_lineoffset] = in[i];
if (tclc->tc_lineoffset < TCL_MAX_LINE)
tclc->tc_lineoffset++;
else
tclc->tc_linedrop = 1;
if (in[i] != '\n')
continue;
/* process the line */
if (tclc->tc_linedrop) {
#define ESTR "line too long\n"
retval = tcl_output(connection, ESTR, sizeof(ESTR));
if (retval != ERROR_OK)
return retval;
#undef ESTR
} else {
tclc->tc_line[tclc->tc_lineoffset-1] = '\0';
retval = Jim_Eval(interp, tclc->tc_line);
result = Jim_GetString(Jim_GetResult(interp), &reslen);
retval = tcl_output(connection, result, reslen);
if (retval != ERROR_OK)
return retval;
if (memchr(result, '\n', reslen) == NULL)
tcl_output(connection, "\n", 1);
}
tclc->tc_lineoffset = 0;
tclc->tc_linedrop = 0;
}
return ERROR_OK;
}
static int tcl_closed(connection_t *connection)
{
/* cleanup connection context */
if (connection->priv) {
free(connection->priv);
connection->priv = NULL;
}
return ERROR_OK;
}
int tcl_init(void)
{
int retval;
if (tcl_port == 0)
{
LOG_WARNING("no tcl port specified, using default port 6666");
tcl_port = 6666;
}
retval = add_service("tcl", CONNECTION_TCL, tcl_port, 1, tcl_new_connection, tcl_input, tcl_closed, NULL);
return retval;
}
int tcl_register_commands(command_context_t *cmd_ctx)
{
register_command(cmd_ctx, NULL, "tcl_port", handle_tcl_port_command, COMMAND_CONFIG, "");
return ERROR_OK;
}
static int handle_tcl_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
if (argc == 1) {
tcl_port = strtoul(args[0], NULL, 0);
}
return ERROR_OK;
}
|