1 /***************************************************************************
4 * This program is free software; you can redistribute it and/or modify *
5 * it under the terms of the GNU General Public License as published by *
6 * the Free Software Foundation; either version 2 of the License, or *
7 * (at your option) any later version. *
9 * This program is distributed in the hope that it will be useful, *
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
12 * GNU General Public License for more details. *
14 * You should have received a copy of the GNU General Public License *
15 * along with this program; if not, write to the *
16 * Free Software Foundation, Inc., *
17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
18 ***************************************************************************/
25 #include "tcl_server.h"
37 #define TCL_SERVER_VERSION "TCL Server 0.1"
38 #define TCL_MAX_LINE (4096)
40 typedef struct tcl_connection_s {
43 char tc_line[TCL_MAX_LINE];
45 int tc_outerror; /* flag an output error */
48 extern Jim_Interp *interp;
49 static unsigned short tcl_port = 0;
52 static int handle_tcl_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
55 static int tcl_new_connection(connection_t *connection);
56 static int tcl_input(connection_t *connection);
57 static int tcl_output(connection_t *connection, const void *buf, ssize_t len);
58 static int tcl_closed(connection_t *connection);
60 /* write data out to a socket.
62 * this is a blocking write, so the return value must equal the length, if
63 * that is not the case then flag the connection with an output error.
65 int tcl_output(connection_t *connection, const void *data, ssize_t len)
68 tcl_connection_t *tclc;
70 tclc = connection->priv;
71 if (tclc->tc_outerror)
72 return ERROR_SERVER_REMOTE_CLOSED;
74 wlen = write_socket(connection->fd, data, len);
78 LOG_ERROR("error during write: %d != %d", (int)wlen, (int)len);
79 tclc->tc_outerror = 1;
80 return ERROR_SERVER_REMOTE_CLOSED;
85 static int tcl_new_connection(connection_t *connection)
87 tcl_connection_t *tclc;
89 tclc = malloc(sizeof(tcl_connection_t));
91 return ERROR_CONNECTION_REJECTED;
93 memset(tclc, 0, sizeof(tcl_connection_t));
94 connection->priv = tclc;
98 static int tcl_input(connection_t *connection)
105 tcl_connection_t *tclc;
108 rlen = read_socket(connection->fd, &in, sizeof(in));
111 LOG_ERROR("error during read: %s", strerror(errno));
112 return ERROR_SERVER_REMOTE_CLOSED;
115 tclc = connection->priv;
117 return ERROR_CONNECTION_REJECTED;
119 /* push as much data into the line as possible */
120 for (i = 0; i < rlen; i++)
122 if (!isprint(in[i]) && !isspace(in[i]))
125 tclc->tc_linedrop = 1;
129 /* buffer the data */
130 tclc->tc_line[tclc->tc_lineoffset] = in[i];
131 if (tclc->tc_lineoffset < TCL_MAX_LINE)
132 tclc->tc_lineoffset++;
134 tclc->tc_linedrop = 1;
139 /* process the line */
140 if (tclc->tc_linedrop) {
141 #define ESTR "line too long\n"
142 retval = tcl_output(connection, ESTR, sizeof(ESTR));
143 if (retval != ERROR_OK)
147 tclc->tc_line[tclc->tc_lineoffset-1] = '\0';
148 retval = Jim_Eval(interp, tclc->tc_line);
149 result = Jim_GetString(Jim_GetResult(interp), &reslen);
150 retval = tcl_output(connection, result, reslen);
151 if (retval != ERROR_OK)
153 if (memchr(result, '\n', reslen) == NULL)
154 tcl_output(connection, "\n", 1);
156 tclc->tc_lineoffset = 0;
157 tclc->tc_linedrop = 0;
163 static int tcl_closed(connection_t *connection)
165 /* cleanup connection context */
166 if (connection->priv) {
167 free(connection->priv);
168 connection->priv = NULL;
179 LOG_WARNING("no tcl port specified, using default port 6666");
183 retval = add_service("tcl", CONNECTION_TCL, tcl_port, 1, tcl_new_connection, tcl_input, tcl_closed, NULL);
188 int tcl_register_commands(command_context_t *cmd_ctx)
190 register_command(cmd_ctx, NULL, "tcl_port", handle_tcl_port_command, COMMAND_CONFIG, "");
194 static int handle_tcl_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
197 tcl_port = strtoul(args[0], NULL, 0);