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freeswitch/src/switch_xml_config.c

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/*
* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
* Copyright (C) 2005-2012, Anthony Minessale II <anthm@freeswitch.org>
*
* 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
* Mathieu Rene <mathieu.rene@gmail.com>
* Portions created by the Initial Developer are Copyright (C)
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Mathieu Rene <mathieu.rene@gmail.com>
*
*
* switch_xml_config.c - Generic configuration parser
*
*/
#include <switch.h>
SWITCH_DECLARE_DATA switch_xml_config_string_options_t switch_config_string_strdup = { NULL, 0, NULL };
static switch_xml_config_enum_item_t switch_config_types_enum[] = {
{"int", SWITCH_CONFIG_INT},
{"switch_atomic_t", SWITCH_CONFIG_INT},
{"string", SWITCH_CONFIG_STRING},
{"bool", SWITCH_CONFIG_BOOL},
{"custom", SWITCH_CONFIG_CUSTOM},
{"enum", SWITCH_CONFIG_ENUM},
{"flag", SWITCH_CONFIG_FLAG},
{"flagarray", SWITCH_CONFIG_FLAGARRAY},
{NULL, 0}
};
SWITCH_DECLARE(switch_size_t) switch_event_import_xml(switch_xml_t xml, const char *keyname, const char *valuename, switch_event_t **event)
{
switch_xml_t node;
switch_size_t count = 0;
if (!*event) {
/* SWITCH_EVENT_CLONE will not insert any generic event headers */
switch_event_create(event, SWITCH_EVENT_CLONE);
switch_assert(*event);
}
for (node = xml; node; node = node->next) {
const char *key = switch_xml_attr_soft(node, keyname);
const char *value = switch_xml_attr_soft(node, valuename);
if (key && value) {
switch_event_add_header_string(*event, SWITCH_STACK_BOTTOM, key, value);
count++;
}
}
return count;
}
SWITCH_DECLARE(switch_status_t) switch_xml_config_parse_module_settings(const char *file, switch_bool_t reload, switch_xml_config_item_t *instructions)
{
switch_xml_t cfg, xml, settings;
switch_status_t status = SWITCH_STATUS_SUCCESS;
if (!(xml = switch_xml_open_cfg(file, &cfg, NULL))) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Could not open %s\n", file);
return SWITCH_STATUS_FALSE;
}
if ((settings = switch_xml_child(cfg, "settings"))) {
status = switch_xml_config_parse(switch_xml_child(settings, "param"), reload, instructions);
}
switch_xml_free(xml);
return status;
}
SWITCH_DECLARE(void) switch_xml_config_item_print_doc(int level, switch_xml_config_item_t *item)
{
if (item->syntax && item->helptext) {
switch_log_printf(SWITCH_CHANNEL_LOG_CLEAN, level, "Item name: [%s]\nType: %s (%s)\nSyntax: %s\nHelp: %s\n\n",
item->key, switch_xml_config_enum_int2str(switch_config_types_enum, item->type),
switch_test_flag(item, CONFIG_REQUIRED) ? "required" : "optional", item->syntax, item->helptext);
}
}
SWITCH_DECLARE(switch_status_t) switch_xml_config_parse(switch_xml_t xml, switch_bool_t reload, switch_xml_config_item_t *instructions)
{
switch_event_t *event = NULL;
switch_status_t result;
int count = switch_event_import_xml(xml, "name", "value", &event);
result = switch_xml_config_parse_event(event, count, reload, instructions);
if (event) {
switch_event_destroy(&event);
}
return result;
}
SWITCH_DECLARE(switch_status_t) switch_xml_config_enum_str2int(switch_xml_config_enum_item_t *enum_options, const char *value, int *out)
{
for (; enum_options->key; enum_options++) {
if (!strcasecmp(value, enum_options->key)) {
*out = enum_options->value;
return SWITCH_STATUS_SUCCESS;
}
}
return SWITCH_STATUS_FALSE;
}
SWITCH_DECLARE(const char *) switch_xml_config_enum_int2str(switch_xml_config_enum_item_t *enum_options, int value)
{
for (; enum_options->key; enum_options++) {
if (value == enum_options->value) {
return enum_options->key;
}
}
return NULL;
}
SWITCH_DECLARE(switch_status_t) switch_xml_config_parse_event(switch_event_t *event, int count, switch_bool_t reload,
switch_xml_config_item_t *instructions)
{
switch_xml_config_item_t *item;
int matched_count = 0;
for (item = instructions; item->key; item++) {
const char *value = switch_event_get_header(event, item->key);
switch_bool_t changed = SWITCH_FALSE;
switch_xml_config_callback_t callback = (switch_xml_config_callback_t) item->function;
void *ptr = item->ptr;
//switch_assert(ptr);
if (value) {
matched_count++;
}
if (reload && !switch_test_flag(item, CONFIG_RELOADABLE)) {
continue;
}
if (!value && switch_test_flag(item, CONFIG_REQUIRED)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Required parameter [%s] is missing\n", item->key);
return SWITCH_STATUS_FALSE;
}
switch (item->type) {
case SWITCH_CONFIG_INT:
{
switch_xml_config_int_options_t *int_options = (switch_xml_config_int_options_t *) item->data;
int *dest = (int *) ptr;
int intval;
if (value) {
if (switch_is_number(value)) {
intval = atoi(value);
} else {
intval = (int) (intptr_t) item->defaultvalue;
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Invalid value [%s] for parameter [%s], setting default [%d]\n",
value, item->key, intval);
}
if (int_options) {
/* Enforce validation options */
if ((int_options->enforce_min && !(intval >= int_options->min)) || (int_options->enforce_max && !(intval <= int_options->max))) {
/* Validation failed, set default */
intval = (int) (intptr_t) item->defaultvalue;
/* Then complain */
if (int_options->enforce_min && int_options->enforce_max) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR,
"Invalid value [%s] for parameter [%s], should be between [%d] and [%d], setting default [%d]\n", value,
item->key, int_options->min, int_options->max, intval);
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR,
"Invalid value [%s] for parameter [%s], should be %s [%d], setting default [%d]\n", value, item->key,
int_options->enforce_min ? "at least" : "at max",
int_options->enforce_min ? int_options->min : int_options->max, intval);
}
}
}
} else {
intval = (int) (intptr_t) item->defaultvalue;
}
if (*dest != intval) {
*dest = intval;
changed = SWITCH_TRUE;
}
}
break;
case SWITCH_CONFIG_ATOMIC:
{
switch_xml_config_atomic_options_t *atomic_options = (switch_xml_config_atomic_options_t *) item->data;
switch_atomic_t *dest = (switch_atomic_t *) ptr;
uint32_t uintval;
if (value) {
if (switch_is_number(value)) {
uintval = (uint32_t) strtol(value, NULL, 10);
} else {
uintval = (uint32_t) (uintptr_t) item->defaultvalue;
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Invalid value [%s] for parameter [%s], setting default [%u]\n",
value, item->key, uintval);
}
if (atomic_options) {
/* Enforce validation options */
if ((atomic_options->enforce_min && !(uintval >= atomic_options->min)) || (atomic_options->enforce_max && !(uintval <= atomic_options->max))) {
/* Validation failed, set default */
uintval = (uint32_t) (uintptr_t) item->defaultvalue;
/* Then complain */
if (atomic_options->enforce_min && atomic_options->enforce_max) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR,
"Invalid value [%s] for parameter [%s], should be between [%u] and [%u], setting default [%u]\n", value,
item->key, atomic_options->min, atomic_options->max, uintval);
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR,
"Invalid value [%s] for parameter [%s], should be %s [%u], setting default [%u]\n", value, item->key,
atomic_options->enforce_min ? "at least" : "at max",
atomic_options->enforce_min ? atomic_options->min : atomic_options->max, uintval);
}
}
}
} else {
uintval = (uint32_t) (uintptr_t) item->defaultvalue;
}
if (switch_atomic_read(dest) != uintval) {
switch_atomic_set(dest, uintval);
changed = SWITCH_TRUE;
}
}
break;
case SWITCH_CONFIG_STRING:
{
switch_xml_config_string_options_t string_options_default = { 0 };
switch_xml_config_string_options_t *string_options =
item->data ? (switch_xml_config_string_options_t *) item->data : &string_options_default;
const char *newstring = NULL;
/* Perform validation */
if (value) {
if (!zstr(string_options->validation_regex)) {
if (switch_regex_match(value, string_options->validation_regex) == SWITCH_STATUS_SUCCESS) {
newstring = value; /* Regex match, accept value */
} else {
newstring = (char *) item->defaultvalue; /* Regex failed */
if (newstring) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Invalid value [%s] for parameter [%s], setting default [%s]\n",
value, item->key, newstring);
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Invalid value [%s] for parameter [%s]\n", value, item->key);
}
switch_xml_config_item_print_doc(SWITCH_LOG_ERROR, item);
}
} else {
newstring = value; /* No validation */
}
} else {
newstring = (char *) item->defaultvalue;
}
if (string_options->length > 0) {
/* We have a preallocated buffer */
char *dest = (char *) ptr;
if (newstring) {
if (strncasecmp(dest, newstring, string_options->length)) {
switch_copy_string(dest, newstring, string_options->length);
changed = SWITCH_TRUE;
}
} else {
if (*dest != '\0') {
*dest = '\0';
changed = SWITCH_TRUE;
}
}
} else if (string_options->pool) {
/* Pool-allocated buffer */
char **dest = (char **) ptr;
if (newstring) {
if (!*dest || strcmp(*dest, newstring)) {
*dest = switch_core_strdup(string_options->pool, newstring);
}
} else {
if (*dest) {
changed = SWITCH_TRUE;
*dest = NULL;
}
}
} else {
/* Dynamically allocated buffer */
char **dest = (char **) ptr;
if (newstring) {
if (!*dest || strcmp(*dest, newstring)) {
switch_safe_free(*dest);
*dest = strdup(newstring);
changed = SWITCH_TRUE;
}
} else {
if (*dest) {
switch_safe_free(*dest);
changed = SWITCH_TRUE;
}
}
}
}
break;
case SWITCH_CONFIG_BOOL:
{
switch_bool_t *dest = (switch_bool_t *) ptr;
switch_bool_t newval = SWITCH_FALSE;
if (value && switch_true(value)) {
newval = SWITCH_TRUE;
} else if (value && switch_false(value)) {
newval = SWITCH_FALSE;
} else if (value) {
/* Value isnt true or false */
newval = (switch_bool_t) (intptr_t) item->defaultvalue;
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Invalid value [%s] for parameter [%s], setting default [%s]\n",
value, item->key, newval ? "true" : "false");
switch_xml_config_item_print_doc(SWITCH_LOG_ERROR, item);
} else {
newval = (switch_bool_t) (intptr_t) item->defaultvalue;
}
if (*dest != newval) {
*dest = newval;
changed = SWITCH_TRUE;
}
}
break;
case SWITCH_CONFIG_CUSTOM:
break;
case SWITCH_CONFIG_ENUM:
{
switch_xml_config_enum_item_t *enum_options = (switch_xml_config_enum_item_t *) item->data;
int *dest = (int *) ptr;
int newval = 0;
switch_status_t lookup_result = SWITCH_STATUS_SUCCESS;
if (value) {
lookup_result = switch_xml_config_enum_str2int(enum_options, value, &newval);
} else {
newval = (int) (intptr_t) item->defaultvalue;
}
if (lookup_result != SWITCH_STATUS_SUCCESS) {
newval = (int) (intptr_t) item->defaultvalue;
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Invalid value [%s] for parameter [%s]\n", value, item->key);
switch_xml_config_item_print_doc(SWITCH_LOG_ERROR, item);
}
if (*dest != newval) {
changed = SWITCH_TRUE;
*dest = newval;
}
}
break;
case SWITCH_CONFIG_FLAG:
{
int32_t *dest = (int32_t *) ptr;
int index = (int) (intptr_t) item->data;
int8_t currentval = (int8_t) ! !(*dest & index);
int newval = 0;
if (value) {
newval = switch_true(value);
} else {
newval = (switch_bool_t) (intptr_t) item->defaultvalue;
}
if (newval != currentval) {
changed = SWITCH_TRUE;
if (newval) {
*dest |= (1 << index);
} else {
*dest &= ~(1 << index);
}
}
}
break;
case SWITCH_CONFIG_FLAGARRAY:
{
int8_t *dest = (int8_t *) ptr;
unsigned int index = (unsigned int) (intptr_t) item->data;
int8_t newval = value ? !!switch_true(value) : (int8_t) ((intptr_t) item->defaultvalue);
if (dest[index] != newval) {
changed = SWITCH_TRUE;
dest[index] = newval;
}
}
break;
case SWITCH_CONFIG_LAST:
break;
default:
break;
}
if (callback) {
callback(item, value, (reload ? CONFIG_RELOAD : CONFIG_LOAD), changed);
}
}
if (count != matched_count) {
/* User made a mistake, find it */
switch_event_header_t *header;
for (header = event->headers; header; header = header->next) {
switch_bool_t found = SWITCH_FALSE;
for (item = instructions; item->key; item++) {
if (!strcasecmp(header->name, item->key)) {
found = SWITCH_TRUE;
break;
}
}
if (!found) {
/* Tell the user */
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING,
"Configuration parameter [%s] is unfortunately not valid, you might want to double-check that.\n", header->name);
}
}
}
return SWITCH_STATUS_SUCCESS;
}
SWITCH_DECLARE(void) switch_xml_config_cleanup(switch_xml_config_item_t *instructions)
{
switch_xml_config_item_t *item;
for (item = instructions; item->key; item++) {
switch_xml_config_callback_t callback = (switch_xml_config_callback_t) item->function;
switch (item->type) {
case SWITCH_CONFIG_STRING:
{
char **ptr = (char **) item->ptr;
switch_xml_config_string_options_t *string_options = (switch_xml_config_string_options_t *) item->data;
/* if (using_strdup) */
if (string_options && !string_options->pool && !string_options->length) {
switch_safe_free(*ptr);
}
}
break;
default:
break;
}
if (callback) {
callback(item, NULL, CONFIG_SHUTDOWN, SWITCH_FALSE);
}
}
}
SWITCH_DECLARE(void) switch_config_perform_set_item(switch_xml_config_item_t *item, const char *key, switch_xml_config_type_t type, int flags, void *ptr,
const void *defaultvalue, void *data, switch_xml_config_callback_t function, const char *syntax,
const char *helptext)
{
item->key = key;
item->type = type;
item->flags = flags;
item->ptr = ptr;
item->defaultvalue = defaultvalue;
item->data = data;
item->function = function;
item->syntax = syntax;
item->helptext = helptext;
}
/* 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 noet:
*/
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