[Freeswitch-svn] [commit] r10508 - freeswitch/trunk/scripts/contrib/intralanman/C/lcr/mod_lcr
FreeSWITCH SVN
intralanman at freeswitch.org
Fri Nov 21 14:43:55 PST 2008
Author: intralanman
Date: Fri Nov 21 17:43:55 2008
New Revision: 10508
Log:
more patches from rupa
Modified:
freeswitch/trunk/scripts/contrib/intralanman/C/lcr/mod_lcr/mod_lcr.c
Modified: freeswitch/trunk/scripts/contrib/intralanman/C/lcr/mod_lcr/mod_lcr.c
==============================================================================
--- freeswitch/trunk/scripts/contrib/intralanman/C/lcr/mod_lcr/mod_lcr.c (original)
+++ freeswitch/trunk/scripts/contrib/intralanman/C/lcr/mod_lcr/mod_lcr.c Fri Nov 21 17:43:55 2008
@@ -1,561 +1,601 @@
-/*
- * FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
- * Copyright (C) 2005/2006, Anthony Minessale II <anthmct at yahoo.com>
- *
- * Version: MPL 1.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
- *
- * The Initial Developer of the Original Code is
- * Anthony Minessale II <anthmct at yahoo.com>
- * Portions created by the Initial Developer are Copyright (C)
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * Raymond Chandler <intralanman at gmail.com>
- *
- * mod_lcr.c -- Least Cost Routing Module
- *
- */
-
-#include <switch.h>
-#include <switch_odbc.h>
-
-
-#define LCR_SYNTAX "lcr <digits>"
-
-/* SQL Query places */
-#define LCR_DIGITS_PLACE 0
-#define LCR_CARRIER_PLACE 1
-#define LCR_RATE_PLACE 2
-#define LCR_GATEWAY_PLACE 3
-#define LCR_IP_ADDRESS_PLACE 4
-#define LCR_PORT_PLACE 5
-#define LCR_LSTRIP_PLACE 6
-#define LCR_TSTRIP_PLACE 7
-#define LCR_PREFIX_PLACE 8
-#define LCR_SUFFIX_PLACE 9
-
-
-#define LCR_DIALSTRING_PLACE 3
-#define LCR_HEADERS_COUNT 4
-char headers[LCR_HEADERS_COUNT][32] = {
- "Digit Match",
- "Carrier",
- "Rate",
- "Dialstring",
-};
-
-struct odbc_obj {
- switch_odbc_handle_t *handle;
- SQLHSTMT stmt;
- SQLCHAR *colbuf;
- int32_t cblen;
- SQLCHAR *code;
- int32_t codelen;
-};
-
-struct lcr_obj {
- char *carrier_name;
- char *gateway_name;
- char *term_host;
- char *port;
- char *digit_str;
- char *prefix;
- char *suffix;
- char *dialstring;
- float rate;
- size_t lstrip;
- size_t tstrip;
- size_t digit_len;
- struct lcr_obj *next;
-};
-
-struct max_obj {
- size_t carrier_name;
- size_t gateway_name;
- size_t digit_str;
- size_t rate;
- size_t dialstring;
-};
-
-typedef struct odbc_obj odbc_obj_t;
-typedef odbc_obj_t *odbc_handle;
-
-typedef struct lcr_obj lcr_obj_t;
-typedef lcr_obj_t *lcr_route;
-
-typedef struct max_obj max_obj_t;
-typedef max_obj_t *max_len;
-
-struct callback_obj {
- lcr_route head;
- int matches;
- char *lookup_number;
-};
-typedef struct callback_obj callback_t;
-
-static struct {
- switch_memory_pool_t *pool;
- char *dbname;
- char *odbc_dsn;
- switch_mutex_t *mutex;
- switch_odbc_handle_t *master_odbc;
- void *filler1;
-} globals;
-
-
-SWITCH_MODULE_LOAD_FUNCTION(mod_lcr_load);
-SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_lcr_shutdown);
-SWITCH_MODULE_DEFINITION(mod_lcr, mod_lcr_load, mod_lcr_shutdown, NULL);
-
-static char *get_bridge_data(const char *dialed_number, lcr_route cur_route) {
- size_t lstrip;
- size_t tstrip;
- char *data = NULL;
- char *destination_number = NULL;
-
- destination_number = strdup(dialed_number);
-
- tstrip = ((cur_route->digit_len - cur_route->tstrip) + 1);
- lstrip = cur_route->lstrip;
-
- if (strlen(destination_number) > tstrip && cur_route->tstrip > 0) {
- destination_number[tstrip] = '\0';
- }
- if (strlen(destination_number) > lstrip && cur_route->lstrip > 0) {
- destination_number += lstrip;
- }
-
- if (strlen(cur_route->gateway_name) > 0) {
- data = switch_mprintf("sofia/gateway/%s/%s%s%s", cur_route->gateway_name
- , cur_route->prefix, destination_number, cur_route->suffix
- );
- } else {
- char port[8];
- switch_snprintf(port, sizeof(port), ":%s", cur_route->port);
- data = switch_mprintf("sofia/${use_profile}/%s@%s%s"
- , destination_number, cur_route->term_host, (strlen(cur_route->port) > 0 ? port : "")
- );
- }
-
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Returning Dialstring %s\n", data);
- switch_safe_free(destination_number);
- return data;
-}
-
-void init_max_lens(max_len maxes) {
- maxes->digit_str = (headers[LCR_DIGITS_PLACE] == NULL ? 0 : strlen(headers[LCR_DIGITS_PLACE]));
- maxes->carrier_name = (headers[LCR_CARRIER_PLACE] == NULL ? 0 : strlen(headers[LCR_CARRIER_PLACE]));
- maxes->gateway_name = (headers[LCR_GATEWAY_PLACE] == NULL ? 0 : strlen(headers[LCR_GATEWAY_PLACE]));
- maxes->dialstring = (headers[LCR_DIALSTRING_PLACE] == NULL ? 0 : strlen(headers[LCR_DIALSTRING_PLACE]));
- maxes->digit_str = (headers[LCR_DIGITS_PLACE] == NULL ? 0 : strlen(headers[LCR_DIGITS_PLACE]));
- maxes->rate = 8;
-}
-
-switch_status_t process_max_lengths(max_obj_t *maxes, lcr_route routes, char *destination_number) {
- lcr_route current = NULL;
-
- if (routes == NULL) {
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "no routes\n");
- return SWITCH_STATUS_FALSE;
- }
- if (maxes == NULL) {
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "no maxes\n");
- return SWITCH_STATUS_FALSE;
- }
-
- init_max_lens(maxes);
-
- for (current = routes; current; current = current->next) {
- size_t this_len;
-
- if (current->gateway_name != NULL) {
- this_len = strlen(current->gateway_name);
- if (this_len > maxes->gateway_name) {
- maxes->gateway_name = this_len;
- }
- }
- if (current->carrier_name != NULL) {
- this_len = strlen(current->carrier_name);
- if (this_len > maxes->carrier_name) {
- maxes->carrier_name = this_len;
- }
- }
- if (current->dialstring != NULL) {
- this_len = strlen(current->dialstring);
- if (this_len > maxes->dialstring) {
- maxes->dialstring = this_len;
- }
- }
- if (current->digit_str != NULL) {
- if (current->digit_len > maxes->digit_str) {
- maxes->digit_str = current->digit_len;
- }
- }
- }
- return SWITCH_STATUS_SUCCESS;
-}
-
-static switch_bool_t lcr_execute_sql_callback(char *sql, switch_core_db_callback_func_t callback, void *pdata) {
- if (globals.odbc_dsn) {
- switch_odbc_handle_callback_exec(globals.master_odbc, sql, callback, pdata);
- return SWITCH_TRUE;
- }
- return SWITCH_FALSE;
-}
-
-int route_add_callback(void *pArg, int argc, char **argv, char **columnNames) {
- lcr_route additional = NULL;
- lcr_route current = NULL;
- callback_t *cbt = (callback_t *) pArg;
-
- cbt->matches++;
-
- switch_zmalloc(additional, sizeof(lcr_obj_t));
-
- additional->digit_len = strlen(argv[LCR_DIGITS_PLACE]);
- additional->digit_str = switch_safe_strdup(argv[LCR_DIGITS_PLACE]);
- additional->suffix = switch_safe_strdup(argv[LCR_SUFFIX_PLACE]);
- additional->prefix = switch_safe_strdup(argv[LCR_PREFIX_PLACE]);
- additional->carrier_name = switch_safe_strdup(argv[LCR_CARRIER_PLACE]);
- additional->rate = (float)atof(argv[LCR_RATE_PLACE]);
- additional->gateway_name = switch_safe_strdup(argv[LCR_GATEWAY_PLACE]);
- additional->term_host = switch_safe_strdup(argv[LCR_IP_ADDRESS_PLACE]);
- additional->port = switch_safe_strdup(argv[LCR_PORT_PLACE]);
- additional->lstrip = atoi(argv[LCR_LSTRIP_PLACE]);
- additional->tstrip = atoi(argv[LCR_TSTRIP_PLACE]);
- additional->dialstring = get_bridge_data(cbt->lookup_number, additional);
-
- if (cbt->head == NULL) {
- additional->next = cbt->head;
- cbt->head = additional;
-
- return SWITCH_STATUS_SUCCESS;
- }
-
- for (current = cbt->head; current; current = current->next) {
-
- if (switch_strlen_zero(additional->gateway_name) && switch_strlen_zero(additional->term_host) && switch_strlen_zero(additional->port) ) {
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING
- , "WTF?!? There's no way to dial this Gateway: %s IP:Port %s:%s\n"
- , additional->gateway_name, additional->term_host, additional->port
- );
- break;
- }
-
- if (!strcmp(current->gateway_name, additional->gateway_name)) {
- if (!strcmp(current->term_host, additional->term_host) && !strcmp(current->port, additional->port)) {
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG
- , "Ignoring Duplicate route for termination point (%s:%s)\n"
- , additional->term_host, additional->port
- );
- switch_safe_free(additional);
- break;
- }
- }
-
- if (current->next == NULL) {
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "adding route to end of list\n");
- current->next = additional;
- break;
- }
- }
- return SWITCH_STATUS_SUCCESS;
-}
-
-switch_status_t lcr_do_lookup(char *digits, callback_t *cb_struct) {
- /* instantiate the object/struct we defined earlier */
- switch_stream_handle_t sql_stream = { 0 };
- size_t n, digit_len = strlen(digits);
- char *digits_copy;
-
- if (switch_strlen_zero(digits)) {
- return SWITCH_FALSE;
- }
-
- digits_copy = strdup(digits);
-
- SWITCH_STANDARD_STREAM(sql_stream);
-
- /* set up the query to be executed */
- sql_stream.write_function(&sql_stream,
- "SELECT l.digits, c.Carrier_Name, l.rate, cg.gateway, cg.term_host, cg.port, l.lead_strip, l.trail_strip, l.prefix, l.suffix "
- );
- sql_stream.write_function(&sql_stream, "FROM lcr l JOIN carriers c ON l.carrier_id=c.id JOIN carrier_gateway cg ON c.id=cg.carrier_id ");
- for (n = digit_len; n > 0; n--) {
- digits_copy[n] = '\0';
- sql_stream.write_function(&sql_stream, "%s digits='%s' ", (n==digit_len ? "WHERE" : "OR"), digits_copy);
- }
- sql_stream.write_function(&sql_stream, "ORDER BY digits DESC, rate;");
-
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "%s\n", (char *)sql_stream.data);
-
- lcr_execute_sql_callback((char *)sql_stream.data, route_add_callback, cb_struct);
- switch_safe_free(sql_stream.data);
-
- return SWITCH_STATUS_SUCCESS;
-}
-
-static switch_status_t lcr_load_config() {
- char *cf = "lcr.conf";
- switch_xml_t cfg, xml, settings, param;
- switch_status_t status = SWITCH_STATUS_SUCCESS;
- char *odbc_user = NULL;
- char *odbc_pass = NULL;
-
- if (!(xml = switch_xml_open_cfg(cf, &cfg, NULL))) {
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "open of %s failed\n", cf);
- return SWITCH_STATUS_TERM;
- }
-
- if ((settings = switch_xml_child(cfg, "settings"))) {
- for (param = switch_xml_child(settings, "param"); param; param = param->next) {
- char *var = NULL;
- char *val = NULL;
- var = (char *) switch_xml_attr_soft(param, "name");
- val = (char *) switch_xml_attr_soft(param, "value");
- if (!strcasecmp(var, "odbc-dsn") && !switch_strlen_zero(val)) {
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "odbc_dsn is %s\n", val);
- globals.odbc_dsn = switch_core_strdup(globals.pool, val);
- if ((odbc_user = strchr(globals.odbc_dsn, ':'))) {
- *odbc_user++ = '\0';
- if ((odbc_pass = strchr(odbc_user, ':'))) {
- *odbc_pass++ = '\0';
- }
- }
- }
- }
- }
- if (globals.odbc_dsn) {
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO
- , "dsn is \"%s\", user is \"%s\", and password is \"%s\"\n"
- , globals.odbc_dsn, odbc_user, odbc_pass
- );
- if (!(globals.master_odbc = switch_odbc_handle_new(globals.odbc_dsn, odbc_user, odbc_pass))) {
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Cannot Open ODBC Database!\n");
- status = SWITCH_STATUS_FALSE;
- goto done;
- }
- if (switch_odbc_handle_connect(globals.master_odbc) != SWITCH_ODBC_SUCCESS) {
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Cannot Open ODBC Database!\n");
- status = SWITCH_STATUS_FALSE;
- goto done;
- }
- }
- done:
- switch_xml_free(xml);
- return status;
-}
-
-static void destroy_list(lcr_route *head) {
- lcr_route cur = NULL, top = *head;
-
- while (top) {
- cur = top;
- top = top->next;
- switch_safe_free(cur->digit_str);
- switch_safe_free(cur->suffix);
- switch_safe_free(cur->prefix);
- switch_safe_free(cur->carrier_name);
- switch_safe_free(cur->gateway_name);
- switch_safe_free(cur);
- }
- *head = NULL;
-}
-
-SWITCH_STANDARD_DIALPLAN(lcr_dialplan_hunt) {
- switch_caller_extension_t *extension = NULL;
- switch_channel_t *channel = switch_core_session_get_channel(session);
- callback_t routes = { 0 };
- lcr_route cur_route = { 0 };
- char *bridge_data = NULL;;
-
- if (!caller_profile) {
- caller_profile = switch_channel_get_caller_profile(channel);
- }
-
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "LCR Lookup on %s\n", caller_profile->destination_number);
- routes.lookup_number = caller_profile->destination_number;
- if (lcr_do_lookup(caller_profile->destination_number, &routes) == SWITCH_STATUS_SUCCESS) {
- if ((extension = switch_caller_extension_new(session, caller_profile->destination_number, caller_profile->destination_number)) == 0) {
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "memory error!\n");
- destroy_list(&routes.head);
- return NULL;
- }
-
- switch_channel_set_variable(channel, SWITCH_CONTINUE_ON_FAILURE_VARIABLE, "true");
- switch_channel_set_variable(channel, SWITCH_HANGUP_AFTER_BRIDGE_VARIABLE, "true");
-
- for (cur_route = routes.head; cur_route; cur_route = cur_route->next) {
- //bridge_data = get_bridge_data(caller_profile->destination_number, cur_route);
- switch_caller_extension_add_application(session, extension, "bridge", cur_route->dialstring);
- switch_safe_free(bridge_data);
- }
- destroy_list(&routes.head);
- } else {
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "LCR lookup failed for %s\n", caller_profile->destination_number);
- }
- switch_safe_free(bridge_data);
-
- return extension;
-}
-
-void str_repeat(size_t how_many, char *what, switch_stream_handle_t *str_stream) {
- size_t i;
-
- //switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "repeating %d of '%s'\n", how_many, what);
-
- for (i=0; i<how_many; i++) {
- str_stream->write_function(str_stream, "%s", what);
- }
-}
-
-SWITCH_STANDARD_API(dialplan_lcr_function) {
- char *argv[4] = { 0 };
- int argc;
- char *mydata = NULL;
- char *dialstring = NULL;
- char *destination_number = NULL;
- lcr_route current = NULL;
- max_obj_t maximum_lengths = { 0 };
- callback_t cb_struct = { 0 };
- //switch_malloc(maximum_lengths, sizeof(max_obj_t));
-
- if (switch_strlen_zero(cmd)) {
- goto usage;
- }
-
- mydata = switch_safe_strdup(cmd);
-
- if ((argc = switch_separate_string(mydata, ' ', argv, (sizeof(argv) / sizeof(argv[0]))))) {
- destination_number = strdup(argv[0]);
- cb_struct.lookup_number = destination_number;
-
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO
- , "data passed to lcr is [%s]\n", cmd
- );
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO
- , "lcr lookup returned [%d]\n"
- , lcr_do_lookup(destination_number, &cb_struct)
- );
- if (cb_struct.head != NULL) {
- size_t len;
-
- process_max_lengths(&maximum_lengths, cb_struct.head, destination_number);
-
- stream->write_function(stream, " | %s", headers[LCR_DIGITS_PLACE]);
- if ((len = (maximum_lengths.digit_str - strlen(headers[LCR_DIGITS_PLACE]))) > 0) {
- str_repeat(len, " ", stream);
- }
-
- stream->write_function(stream, " | %s", headers[LCR_CARRIER_PLACE]);
- if ((len = (maximum_lengths.carrier_name - strlen(headers[LCR_CARRIER_PLACE]))) > 0) {
- str_repeat(len, " ", stream);
- }
-
- stream->write_function(stream, " | %s", headers[LCR_RATE_PLACE]);
- if ((len = (maximum_lengths.rate - strlen(headers[LCR_RATE_PLACE]))) > 0) {
- str_repeat(len, " ", stream);
- }
-
- stream->write_function(stream, " | %s", headers[LCR_DIALSTRING_PLACE]);
- if ((len = (maximum_lengths.dialstring - strlen(headers[LCR_DIALSTRING_PLACE]))) > 0) {
- str_repeat(len, " ", stream);
- }
-
- stream->write_function(stream, " |\n");
-
- current = cb_struct.head;
- while (current) {
- char srate[10];
-
- dialstring = get_bridge_data(destination_number, current);
- switch_snprintf(srate, sizeof(srate), "%0.5f", current->rate);
-
- stream->write_function(stream, " | %s", current->digit_str);
- str_repeat((maximum_lengths.digit_str - current->digit_len), " ", stream);
-
- stream->write_function(stream, " | %s", current->carrier_name );
- str_repeat((maximum_lengths.carrier_name - strlen(current->carrier_name)), " ", stream);
-
- stream->write_function(stream, " | %s", srate );
- str_repeat((maximum_lengths.rate - strlen(srate)), " ", stream);
-
- stream->write_function(stream, " | %s", dialstring);
- str_repeat((maximum_lengths.dialstring - strlen(dialstring)), " ", stream);
-
- stream->write_function(stream, " |\n");
-
- switch_safe_free(dialstring);
- current = current->next;
- }
-
- destroy_list(&cb_struct.head);
- switch_safe_free(dialstring);
- } else {
- stream->write_function(stream, "No Routes To Display\n");
- }
- }
-
- switch_safe_free(mydata);
- return SWITCH_STATUS_SUCCESS;
- usage:
- stream->write_function(stream, "USAGE: %s\n", LCR_SYNTAX);
- return SWITCH_STATUS_SUCCESS;
-}
-
-SWITCH_MODULE_LOAD_FUNCTION(mod_lcr_load) {
- switch_api_interface_t *dialplan_lcr_api_interface;
- switch_dialplan_interface_t *dp_interface;
-
- *module_interface = switch_loadable_module_create_module_interface(pool, modname);
-
-#ifndef SWITCH_HAVE_ODBC
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "You must have ODBC support in FreeSWITCH to use this module\n");
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "\t./configure --enable-core-odbc-support\n");
- return SWITCH_STATUS_FALSE;
-#endif
-
- globals.pool = pool;
-
- if (lcr_load_config() != SWITCH_STATUS_SUCCESS) {
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Unable to load lcr config file\n");
- return SWITCH_STATUS_FALSE;
- }
- if (switch_mutex_init(&globals.mutex, SWITCH_MUTEX_NESTED, globals.pool) != SWITCH_STATUS_SUCCESS) {
- switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "failed to initialize mutex\n");
- }
-
- SWITCH_ADD_API(dialplan_lcr_api_interface, "lcr", "Least Cost Routing Module", dialplan_lcr_function, LCR_SYNTAX);
- SWITCH_ADD_DIALPLAN(dp_interface, "lcr", lcr_dialplan_hunt);
-
- /* indicate that the module should continue to be loaded */
- return SWITCH_STATUS_SUCCESS;
-}
-
-SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_lcr_shutdown) {
- return SWITCH_STATUS_SUCCESS;
-}
-
-/* For Emacs:
- * Local Variables:
- * mode:c
- * indent-tabs-mode:t
- * tab-width:4
- * c-basic-offset:4
- * End:
- * For VIM:
- * vim:set softtabstop=4 shiftwidth=4 tabstop=4 expandtab:
- */
+/*
+ * FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
+ * Copyright (C) 2005/2006, Anthony Minessale II <anthmct at yahoo.com>
+ *
+ * Version: MPL 1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
+ *
+ * The Initial Developer of the Original Code is
+ * Anthony Minessale II <anthmct at yahoo.com>
+ * Portions created by the Initial Developer are Copyright (C)
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Raymond Chandler <intralanman at gmail.com>
+ * Rupa Schomaker <rupa at rupa.com>
+ *
+ * mod_lcr.c -- Least Cost Routing Module
+ *
+ */
+
+#include <switch.h>
+#include <switch_odbc.h>
+
+
+#define LCR_SYNTAX "lcr <digits>"
+
+/* SQL Query places */
+#define LCR_DIGITS_PLACE 0
+#define LCR_CARRIER_PLACE 1
+#define LCR_RATE_PLACE 2
+#define LCR_GW_PREFIX_PLACE 3
+#define LCR_GW_SUFFIX_PLACE 4
+#define LCR_LSTRIP_PLACE 5
+#define LCR_TSTRIP_PLACE 6
+#define LCR_PREFIX_PLACE 7
+#define LCR_SUFFIX_PLACE 8
+
+
+#define LCR_DIALSTRING_PLACE 3
+#define LCR_HEADERS_COUNT 4
+char headers[LCR_HEADERS_COUNT][32] = {
+ "Digit Match",
+ "Carrier",
+ "Rate",
+ "Dialstring",
+};
+
+struct odbc_obj {
+ switch_odbc_handle_t *handle;
+ SQLHSTMT stmt;
+ SQLCHAR *colbuf;
+ int32_t cblen;
+ SQLCHAR *code;
+ int32_t codelen;
+};
+
+struct lcr_obj {
+ char *carrier_name;
+ char *gw_prefix;
+ char *gw_suffix;
+ char *digit_str;
+ char *prefix;
+ char *suffix;
+ char *dialstring;
+ float rate;
+ char *rate_str;
+ size_t lstrip;
+ size_t tstrip;
+ size_t digit_len;
+ struct lcr_obj *next;
+};
+
+struct max_obj {
+ size_t carrier_name;
+ size_t digit_str;
+ size_t rate;
+ size_t dialstring;
+};
+
+typedef struct odbc_obj odbc_obj_t;
+typedef odbc_obj_t *odbc_handle;
+
+typedef struct lcr_obj lcr_obj_t;
+typedef lcr_obj_t *lcr_route;
+
+typedef struct max_obj max_obj_t;
+typedef max_obj_t *max_len;
+
+struct callback_obj {
+ lcr_route head;
+ int matches;
+ char *lookup_number;
+};
+typedef struct callback_obj callback_t;
+
+static struct {
+ switch_memory_pool_t *pool;
+ char *dbname;
+ char *odbc_dsn;
+ switch_mutex_t *mutex;
+ switch_odbc_handle_t *master_odbc;
+ void *filler1;
+} globals;
+
+
+SWITCH_MODULE_LOAD_FUNCTION(mod_lcr_load);
+SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_lcr_shutdown);
+SWITCH_MODULE_DEFINITION(mod_lcr, mod_lcr_load, mod_lcr_shutdown, NULL);
+
+static char *get_bridge_data(const char *dialed_number, lcr_route cur_route) {
+ size_t lstrip;
+ size_t tstrip;
+ char *data = NULL;
+ char *destination_number = NULL;
+ char *orig_destination_number = NULL;
+
+ orig_destination_number = destination_number = strdup(dialed_number);
+
+ tstrip = ((cur_route->digit_len - cur_route->tstrip) + 1);
+ lstrip = cur_route->lstrip;
+
+ if (strlen(destination_number) > tstrip && cur_route->tstrip > 0) {
+ destination_number[tstrip] = '\0';
+ }
+ if (strlen(destination_number) > lstrip && cur_route->lstrip > 0) {
+ destination_number += lstrip;
+ }
+
+ data = switch_mprintf("%s%s%s%s%s", cur_route->gw_prefix, cur_route->prefix
+ , destination_number, cur_route->suffix, cur_route->gw_suffix);
+
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Returning Dialstring %s\n", data);
+ switch_safe_free(orig_destination_number);
+ return data;
+}
+
+void init_max_lens(max_len maxes) {
+ maxes->digit_str = (headers[LCR_DIGITS_PLACE] == NULL ? 0 : strlen(headers[LCR_DIGITS_PLACE]));
+ maxes->carrier_name = (headers[LCR_CARRIER_PLACE] == NULL ? 0 : strlen(headers[LCR_CARRIER_PLACE]));
+ maxes->dialstring = (headers[LCR_DIALSTRING_PLACE] == NULL ? 0 : strlen(headers[LCR_DIALSTRING_PLACE]));
+ maxes->digit_str = (headers[LCR_DIGITS_PLACE] == NULL ? 0 : strlen(headers[LCR_DIGITS_PLACE]));
+ maxes->rate = 8;
+}
+
+switch_status_t process_max_lengths(max_obj_t *maxes, lcr_route routes, char *destination_number) {
+ lcr_route current = NULL;
+
+ if (routes == NULL) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "no routes\n");
+ return SWITCH_STATUS_FALSE;
+ }
+ if (maxes == NULL) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "no maxes\n");
+ return SWITCH_STATUS_FALSE;
+ }
+
+ init_max_lens(maxes);
+
+ for (current = routes; current; current = current->next) {
+ size_t this_len;
+
+ if (current->carrier_name != NULL) {
+ this_len = strlen(current->carrier_name);
+ if (this_len > maxes->carrier_name) {
+ maxes->carrier_name = this_len;
+ }
+ }
+ if (current->dialstring != NULL) {
+ this_len = strlen(current->dialstring);
+ if (this_len > maxes->dialstring) {
+ maxes->dialstring = this_len;
+ }
+ }
+ if (current->digit_str != NULL) {
+ if (current->digit_len > maxes->digit_str) {
+ maxes->digit_str = current->digit_len;
+ }
+ }
+ if (current->rate_str != NULL) {
+ this_len = strlen(current->rate_str);
+ if (this_len > maxes->rate) {
+ maxes->rate = this_len;
+ }
+ }
+ }
+ return SWITCH_STATUS_SUCCESS;
+}
+
+static switch_bool_t lcr_execute_sql_callback(char *sql, switch_core_db_callback_func_t callback, void *pdata) {
+ if (globals.odbc_dsn) {
+ switch_odbc_handle_callback_exec(globals.master_odbc, sql, callback, pdata);
+ return SWITCH_TRUE;
+ }
+ return SWITCH_FALSE;
+}
+
+int route_add_callback(void *pArg, int argc, char **argv, char **columnNames) {
+ lcr_route additional = NULL;
+ lcr_route current = NULL;
+ callback_t *cbt = (callback_t *) pArg;
+ char srate[10];
+
+ cbt->matches++;
+
+ switch_zmalloc(additional, sizeof(lcr_obj_t));
+
+ additional->digit_len = strlen(argv[LCR_DIGITS_PLACE]);
+ additional->digit_str = switch_safe_strdup(argv[LCR_DIGITS_PLACE]);
+ additional->suffix = switch_safe_strdup(argv[LCR_SUFFIX_PLACE]);
+ additional->prefix = switch_safe_strdup(argv[LCR_PREFIX_PLACE]);
+ additional->carrier_name = switch_safe_strdup(argv[LCR_CARRIER_PLACE]);
+ additional->rate = (float)atof(argv[LCR_RATE_PLACE]);
+ switch_snprintf(srate, sizeof(srate), "%0.5f", additional->rate);
+ additional->rate_str = switch_safe_strdup(srate);
+ additional->gw_prefix = switch_safe_strdup(argv[LCR_GW_PREFIX_PLACE]);
+ additional->gw_suffix = switch_safe_strdup(argv[LCR_GW_SUFFIX_PLACE]);
+ additional->lstrip = atoi(argv[LCR_LSTRIP_PLACE]);
+ additional->tstrip = atoi(argv[LCR_TSTRIP_PLACE]);
+ additional->dialstring = get_bridge_data(cbt->lookup_number, additional);
+
+ if (cbt->head == NULL) {
+ additional->next = cbt->head;
+ cbt->head = additional;
+
+ return SWITCH_STATUS_SUCCESS;
+ }
+
+ for (current = cbt->head; current; current = current->next) {
+
+ if (switch_strlen_zero(additional->gw_prefix) && switch_strlen_zero(additional->gw_suffix) ) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING
+ , "WTF?!? There's no way to dial this Gateway: Carrier: \"%s\" Prefix: \"%s\", Suffix \"%s\"\n"
+ , additional->carrier_name
+ , additional->gw_prefix, additional->gw_suffix
+ );
+ break;
+ }
+
+ if (!strcmp(current->gw_prefix, additional->gw_prefix) && !strcmp(current->gw_suffix, additional->gw_suffix)) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG
+ , "Ignoring Duplicate route for termination point (%s:%s)\n"
+ , additional->gw_prefix, additional->gw_suffix
+ );
+ switch_safe_free(additional);
+ break;
+ }
+
+ if (current->next == NULL) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "adding route to end of list\n");
+ current->next = additional;
+ break;
+ }
+ }
+ return SWITCH_STATUS_SUCCESS;
+}
+
+switch_status_t lcr_do_lookup(char *digits, callback_t *cb_struct) {
+ /* instantiate the object/struct we defined earlier */
+ switch_stream_handle_t sql_stream = { 0 };
+ size_t n, digit_len = strlen(digits);
+ char *digits_copy;
+
+ if (switch_strlen_zero(digits)) {
+ return SWITCH_FALSE;
+ }
+
+ digits_copy = strdup(digits);
+
+ SWITCH_STANDARD_STREAM(sql_stream);
+
+ /* set up the query to be executed */
+ sql_stream.write_function(&sql_stream,
+ "SELECT l.digits, c.carrier_name, l.rate, cg.prefix AS gw_prefix, cg.suffix AS gw_suffix, l.lead_strip, l.trail_strip, l.prefix, l.suffix "
+ );
+ sql_stream.write_function(&sql_stream, "FROM lcr l JOIN carriers c ON l.carrier_id=c.id JOIN carrier_gateway cg ON c.id=cg.carrier_id ");
+ for (n = digit_len; n > 0; n--) {
+ digits_copy[n] = '\0';
+ sql_stream.write_function(&sql_stream, "%s digits='%s' ", (n==digit_len ? "WHERE" : "OR"), digits_copy);
+ }
+ sql_stream.write_function(&sql_stream, "ORDER BY digits DESC, rate;");
+
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "%s\n", (char *)sql_stream.data);
+
+ lcr_execute_sql_callback((char *)sql_stream.data, route_add_callback, cb_struct);
+ switch_safe_free(sql_stream.data);
+
+ return SWITCH_STATUS_SUCCESS;
+}
+
+static switch_status_t lcr_load_config() {
+ char *cf = "lcr.conf";
+ switch_xml_t cfg, xml, settings, param;
+ switch_status_t status = SWITCH_STATUS_SUCCESS;
+ char *odbc_user = NULL;
+ char *odbc_pass = NULL;
+
+ if (!(xml = switch_xml_open_cfg(cf, &cfg, NULL))) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "open of %s failed\n", cf);
+ return SWITCH_STATUS_TERM;
+ }
+
+ if ((settings = switch_xml_child(cfg, "settings"))) {
+ for (param = switch_xml_child(settings, "param"); param; param = param->next) {
+ char *var = NULL;
+ char *val = NULL;
+ var = (char *) switch_xml_attr_soft(param, "name");
+ val = (char *) switch_xml_attr_soft(param, "value");
+ if (!strcasecmp(var, "odbc-dsn") && !switch_strlen_zero(val)) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "odbc_dsn is %s\n", val);
+ globals.odbc_dsn = switch_core_strdup(globals.pool, val);
+ if ((odbc_user = strchr(globals.odbc_dsn, ':'))) {
+ *odbc_user++ = '\0';
+ if ((odbc_pass = strchr(odbc_user, ':'))) {
+ *odbc_pass++ = '\0';
+ }
+ }
+ }
+ }
+ }
+ if (globals.odbc_dsn) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO
+ , "dsn is \"%s\", user is \"%s\", and password is \"%s\"\n"
+ , globals.odbc_dsn, odbc_user, odbc_pass
+ );
+ if (!(globals.master_odbc = switch_odbc_handle_new(globals.odbc_dsn, odbc_user, odbc_pass))) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Cannot Open ODBC Database!\n");
+ status = SWITCH_STATUS_FALSE;
+ goto done;
+ }
+ if (switch_odbc_handle_connect(globals.master_odbc) != SWITCH_ODBC_SUCCESS) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Cannot Open ODBC Database!\n");
+ status = SWITCH_STATUS_FALSE;
+ goto done;
+ }
+ }
+ done:
+ switch_xml_free(xml);
+ return status;
+}
+
+static void destroy_list(lcr_route *head) {
+ lcr_route cur = NULL, top = *head;
+
+ while (top) {
+ cur = top;
+ top = top->next;
+ switch_safe_free(cur->digit_str);
+ switch_safe_free(cur->suffix);
+ switch_safe_free(cur->prefix);
+ switch_safe_free(cur->carrier_name);
+ switch_safe_free(cur->gw_prefix);
+ switch_safe_free(cur->gw_suffix);
+ switch_safe_free(cur->rate_str);
+ switch_safe_free(cur);
+ }
+ *head = NULL;
+}
+
+SWITCH_STANDARD_DIALPLAN(lcr_dialplan_hunt) {
+ switch_caller_extension_t *extension = NULL;
+ switch_channel_t *channel = switch_core_session_get_channel(session);
+ callback_t routes = { 0 };
+ lcr_route cur_route = { 0 };
+ char *bridge_data = NULL;;
+
+ if (!caller_profile) {
+ caller_profile = switch_channel_get_caller_profile(channel);
+ }
+
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "LCR Lookup on %s\n", caller_profile->destination_number);
+ routes.lookup_number = caller_profile->destination_number;
+ if (lcr_do_lookup(caller_profile->destination_number, &routes) == SWITCH_STATUS_SUCCESS) {
+ if ((extension = switch_caller_extension_new(session, caller_profile->destination_number, caller_profile->destination_number)) == 0) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "memory error!\n");
+ destroy_list(&routes.head);
+ return NULL;
+ }
+
+ switch_channel_set_variable(channel, SWITCH_CONTINUE_ON_FAILURE_VARIABLE, "true");
+ switch_channel_set_variable(channel, SWITCH_HANGUP_AFTER_BRIDGE_VARIABLE, "true");
+
+ for (cur_route = routes.head; cur_route; cur_route = cur_route->next) {
+ //bridge_data = get_bridge_data(caller_profile->destination_number, cur_route);
+ switch_caller_extension_add_application(session, extension, "bridge", cur_route->dialstring);
+ switch_safe_free(bridge_data);
+ }
+ destroy_list(&routes.head);
+ } else {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "LCR lookup failed for %s\n", caller_profile->destination_number);
+ }
+ switch_safe_free(bridge_data);
+
+ return extension;
+}
+
+void str_repeat(size_t how_many, char *what, switch_stream_handle_t *str_stream) {
+ size_t i;
+
+ //switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "repeating %d of '%s'\n", how_many, what);
+
+ for (i=0; i<how_many; i++) {
+ str_stream->write_function(str_stream, "%s", what);
+ }
+}
+
+SWITCH_STANDARD_APP(lcr_app_function)
+{
+ int argc = 0;
+ char *argv[4] = { 0 };
+ char *mydata = NULL;
+ char *dest = NULL;
+ char rbuf[1024] = "";
+ char vbuf[1024] = "";
+ char *rbp = rbuf;
+ switch_size_t l = 0, rbl = sizeof(rbuf);
+ uint32_t cnt = 1;
+ switch_channel_t *channel = switch_core_session_get_channel(session);
+ char *last_delim = "|";
+ callback_t routes = { 0 };
+ lcr_route cur_route = { 0 };
+
+ if (!(mydata = switch_core_session_strdup(session, data))) {
+ return;
+ }
+
+ if ((argc = switch_separate_string(mydata, ' ', argv, (sizeof(argv) / sizeof(argv[0]))))) {
+ dest = argv[0];
+
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "LCR Lookup on %s\n", dest);
+ routes.lookup_number = dest;
+ if (lcr_do_lookup(dest, &routes) == SWITCH_STATUS_SUCCESS) {
+ for (cur_route = routes.head; cur_route; cur_route = cur_route->next) {
+ switch_snprintf(vbuf, sizeof(vbuf), "lcr_route_%d", cnt++);
+ switch_channel_set_variable(channel, vbuf, cur_route->dialstring);
+ switch_snprintf(rbp, rbl, "%s|", cur_route->dialstring);
+ last_delim = end_of_p(rbp);
+ l = strlen(cur_route->dialstring) + 1;
+ rbp += l;
+ rbl -= l;
+ }
+ switch_snprintf(vbuf, sizeof(vbuf), "%d", cnt - 1);
+ switch_channel_set_variable(channel, "lcr_route_count", vbuf);
+ *(rbuf + strlen(rbuf) - 1) = '\0';
+ switch_channel_set_variable(channel, "lcr_auto_route", rbuf);
+ destroy_list(&routes.head);
+ } else {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "LCR lookup failed for %s\n", dest);
+ }
+ }
+}
+
+SWITCH_STANDARD_API(dialplan_lcr_function) {
+ char *argv[4] = { 0 };
+ int argc;
+ char *mydata = NULL;
+ char *dialstring = NULL;
+ char *destination_number = NULL;
+ lcr_route current = NULL;
+ max_obj_t maximum_lengths = { 0 };
+ callback_t cb_struct = { 0 };
+ //switch_malloc(maximum_lengths, sizeof(max_obj_t));
+
+ if (switch_strlen_zero(cmd)) {
+ goto usage;
+ }
+
+ mydata = switch_safe_strdup(cmd);
+
+ if ((argc = switch_separate_string(mydata, ' ', argv, (sizeof(argv) / sizeof(argv[0]))))) {
+ destination_number = strdup(argv[0]);
+ cb_struct.lookup_number = destination_number;
+
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO
+ , "data passed to lcr is [%s]\n", cmd
+ );
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO
+ , "lcr lookup returned [%d]\n"
+ , lcr_do_lookup(destination_number, &cb_struct)
+ );
+ if (cb_struct.head != NULL) {
+ size_t len;
+
+ process_max_lengths(&maximum_lengths, cb_struct.head, destination_number);
+
+ stream->write_function(stream, " | %s", headers[LCR_DIGITS_PLACE]);
+ if ((len = (maximum_lengths.digit_str - strlen(headers[LCR_DIGITS_PLACE]))) > 0) {
+ str_repeat(len, " ", stream);
+ }
+
+ stream->write_function(stream, " | %s", headers[LCR_CARRIER_PLACE]);
+ if ((len = (maximum_lengths.carrier_name - strlen(headers[LCR_CARRIER_PLACE]))) > 0) {
+ str_repeat(len, " ", stream);
+ }
+
+ stream->write_function(stream, " | %s", headers[LCR_RATE_PLACE]);
+ if ((len = (maximum_lengths.rate - strlen(headers[LCR_RATE_PLACE]))) > 0) {
+ str_repeat(len, " ", stream);
+ }
+
+ stream->write_function(stream, " | %s", headers[LCR_DIALSTRING_PLACE]);
+ if ((len = (maximum_lengths.dialstring - strlen(headers[LCR_DIALSTRING_PLACE]))) > 0) {
+ str_repeat(len, " ", stream);
+ }
+
+ stream->write_function(stream, " |\n");
+
+ current = cb_struct.head;
+ while (current) {
+
+ dialstring = get_bridge_data(destination_number, current);
+
+ stream->write_function(stream, " | %s", current->digit_str);
+ str_repeat((maximum_lengths.digit_str - current->digit_len), " ", stream);
+
+ stream->write_function(stream, " | %s", current->carrier_name );
+ str_repeat((maximum_lengths.carrier_name - strlen(current->carrier_name)), " ", stream);
+
+ stream->write_function(stream, " | %s", current->rate_str );
+ str_repeat((maximum_lengths.rate - strlen(current->rate_str)), " ", stream);
+
+ stream->write_function(stream, " | %s", dialstring);
+ str_repeat((maximum_lengths.dialstring - strlen(dialstring)), " ", stream);
+
+ stream->write_function(stream, " |\n");
+
+ switch_safe_free(dialstring);
+ current = current->next;
+ }
+
+ destroy_list(&cb_struct.head);
+ switch_safe_free(dialstring);
+ } else {
+ stream->write_function(stream, "No Routes To Display\n");
+ }
+ }
+
+ switch_safe_free(mydata);
+ return SWITCH_STATUS_SUCCESS;
+ usage:
+ stream->write_function(stream, "USAGE: %s\n", LCR_SYNTAX);
+ return SWITCH_STATUS_SUCCESS;
+}
+
+SWITCH_MODULE_LOAD_FUNCTION(mod_lcr_load) {
+ switch_api_interface_t *dialplan_lcr_api_interface;
+ switch_application_interface_t *app_interface;
+ switch_dialplan_interface_t *dp_interface;
+
+ *module_interface = switch_loadable_module_create_module_interface(pool, modname);
+
+#ifndef SWITCH_HAVE_ODBC
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "You must have ODBC support in FreeSWITCH to use this module\n");
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "\t./configure --enable-core-odbc-support\n");
+ return SWITCH_STATUS_FALSE;
+#endif
+
+ globals.pool = pool;
+
+ if (lcr_load_config() != SWITCH_STATUS_SUCCESS) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Unable to load lcr config file\n");
+ return SWITCH_STATUS_FALSE;
+ }
+ if (switch_mutex_init(&globals.mutex, SWITCH_MUTEX_NESTED, globals.pool) != SWITCH_STATUS_SUCCESS) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "failed to initialize mutex\n");
+ }
+
+ SWITCH_ADD_API(dialplan_lcr_api_interface, "lcr", "Least Cost Routing Module", dialplan_lcr_function, LCR_SYNTAX);
+ SWITCH_ADD_APP(app_interface, "lcr", "Perform an LCR lookup", "Perform an LCR lookup",
+ lcr_app_function, "<number>", SAF_SUPPORT_NOMEDIA);
+ SWITCH_ADD_DIALPLAN(dp_interface, "lcr", lcr_dialplan_hunt);
+
+ /* indicate that the module should continue to be loaded */
+ return SWITCH_STATUS_SUCCESS;
+}
+
+SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_lcr_shutdown) {
+ return SWITCH_STATUS_SUCCESS;
+}
+
+/* For Emacs:
+ * Local Variables:
+ * mode:c
+ * indent-tabs-mode:t
+ * tab-width:4
+ * c-basic-offset:4
+ * End:
+ * For VIM:
+ * vim:set softtabstop=4 shiftwidth=4 tabstop=4 expandtab:
+ */
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