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CMake/Utilities/cmxmlrpc/xmlrpc_registry.c

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/* Copyright (C) 2001 by First Peer, Inc. All rights reserved.
** Copyright (C) 2001 by Eric Kidd. All rights reserved.
** Copyright (C) 2001 by Luke Howard. All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
** ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
** SUCH DAMAGE. */
#include "xmlrpc_config.h"
#include <stdlib.h>
#include <string.h>
#include "xmlrpc.h"
#include "xmlrpc_server.h"
#include "xmlrpc_int.h"
/*=========================================================================
** XML-RPC Server Method Registry
**=========================================================================
** A method registry maintains a list of functions, and handles
** dispatching. To build an XML-RPC server, just add a communications
** protocol. :-)
*/
static void
install_system_methods (xmlrpc_env *env, xmlrpc_registry *registry);
xmlrpc_registry *
xmlrpc_registry_new(xmlrpc_env *env) {
xmlrpc_value *methods;
xmlrpc_registry *registry;
int registry_valid;
XMLRPC_ASSERT_ENV_OK(env);
/* Error-handling preconditions. */
methods = NULL;
registry = NULL;
registry_valid = 0;
/* Allocate our memory. */
methods = xmlrpc_struct_new(env);
XMLRPC_FAIL_IF_FAULT(env);
registry = (xmlrpc_registry*) malloc(sizeof(xmlrpc_registry));
XMLRPC_FAIL_IF_NULL(registry, env, XMLRPC_INTERNAL_ERROR,
"Could not allocate memory for registry");
/* Set everything up. */
registry->_introspection_enabled = 1;
registry->_methods = methods;
registry->_default_method = NULL;
registry->_preinvoke_method = NULL;
registry_valid = 1;
/* Install our system methods. */
install_system_methods(env, registry);
XMLRPC_FAIL_IF_FAULT(env);
cleanup:
if (env->fault_occurred) {
if (registry_valid) {
xmlrpc_registry_free(registry);
} else {
if (methods)
xmlrpc_DECREF(methods);
if (registry)
free(registry);
}
return NULL;
}
return registry;
}
void
xmlrpc_registry_free(xmlrpc_registry * registry) {
XMLRPC_ASSERT_PTR_OK(registry);
XMLRPC_ASSERT(registry->_methods != XMLRPC_BAD_POINTER);
xmlrpc_DECREF(registry->_methods);
registry->_methods = XMLRPC_BAD_POINTER;
if (registry->_default_method != NULL)
xmlrpc_DECREF(registry->_default_method);
if (registry->_preinvoke_method != NULL)
xmlrpc_DECREF(registry->_preinvoke_method);
free(registry);
}
/*=========================================================================
** xmlrpc_registry_disable_introspection
**=========================================================================
** See xmlrpc.h for more documentation.
*/
void
xmlrpc_registry_disable_introspection(xmlrpc_registry * registry) {
XMLRPC_ASSERT_PTR_OK(registry);
registry->_introspection_enabled = 0;
}
/*=========================================================================
** xmlrpc_registry_add_method
**=========================================================================
** See xmlrpc.h for more documentation.
*/
void
xmlrpc_registry_add_method(xmlrpc_env *env,
xmlrpc_registry *registry,
const char *host,
const char *method_name,
xmlrpc_method method,
void *user_data) {
xmlrpc_registry_add_method_w_doc (env, registry, host, method_name,
method, user_data, "?",
"No help is available for this method.");
}
void
xmlrpc_registry_add_method_w_doc(xmlrpc_env *env,
xmlrpc_registry *registry,
const char *host,
const char *method_name,
xmlrpc_method method,
void *user_data,
const char *signature,
const char *help) {
xmlrpc_value *method_info;
XMLRPC_ASSERT_ENV_OK(env);
XMLRPC_ASSERT_PTR_OK(registry);
XMLRPC_ASSERT(host == NULL);
XMLRPC_ASSERT_PTR_OK(method_name);
XMLRPC_ASSERT_PTR_OK(method);
/* Error-handling preconditions. */
method_info = NULL;
/* Store our method and user data into our hash table. */
method_info = xmlrpc_build_value(env, "(ppss)", (void*) method, user_data,
signature, help);
XMLRPC_FAIL_IF_FAULT(env);
xmlrpc_struct_set_value(env, registry->_methods, method_name, method_info);
XMLRPC_FAIL_IF_FAULT(env);
cleanup:
if (method_info)
xmlrpc_DECREF(method_info);
}
/*=========================================================================
** xmlrpc_registry_set_default_method
**=========================================================================
** See xmlrpc.h for more documentation.
*/
void
xmlrpc_registry_set_default_method(xmlrpc_env *env,
xmlrpc_registry *registry,
xmlrpc_default_method handler,
void *user_data) {
xmlrpc_value *method_info;
XMLRPC_ASSERT_ENV_OK(env);
XMLRPC_ASSERT_PTR_OK(registry);
XMLRPC_ASSERT_PTR_OK(handler);
/* Error-handling preconditions. */
method_info = NULL;
/* Store our method and user data into our hash table. */
method_info = xmlrpc_build_value(env, "(pp)", (void*) handler, user_data);
XMLRPC_FAIL_IF_FAULT(env);
/* Dispose of any pre-existing default method and install ours. */
if (registry->_default_method)
xmlrpc_DECREF(registry->_default_method);
registry->_default_method = method_info;
cleanup:
if (env->fault_occurred) {
if (method_info)
xmlrpc_DECREF(method_info);
}
}
/*=========================================================================
** xmlrpc_registry_set_preinvoke_method
**=========================================================================
** See xmlrpc.h for more documentation.
*/
void
xmlrpc_registry_set_preinvoke_method(xmlrpc_env *env,
xmlrpc_registry *registry,
xmlrpc_preinvoke_method handler,
void *user_data) {
xmlrpc_value *method_info;
XMLRPC_ASSERT_ENV_OK(env);
XMLRPC_ASSERT_PTR_OK(registry);
XMLRPC_ASSERT_PTR_OK(handler);
/* Error-handling preconditions. */
method_info = NULL;
/* Store our method and user data into our hash table. */
method_info = xmlrpc_build_value(env, "(pp)", (void*) handler, user_data);
XMLRPC_FAIL_IF_FAULT(env);
/* Dispose of any pre-existing preinvoke method and install ours. */
if (registry->_preinvoke_method)
xmlrpc_DECREF(registry->_preinvoke_method);
registry->_preinvoke_method = method_info;
cleanup:
if (env->fault_occurred) {
if (method_info)
xmlrpc_DECREF(method_info);
}
}
/*=========================================================================
** dispatch_call
**=========================================================================
** An internal method which actually does the dispatch. This may get
** prettified and exported at some point in the future.
*/
static void
callPreinvokeMethodIfAny(xmlrpc_env * const envP,
xmlrpc_registry * const registryP,
const char * const methodName,
xmlrpc_value * const paramArrayP) {
/* Get the preinvoke method, if it is set. */
if (registryP->_preinvoke_method) {
xmlrpc_preinvoke_method preinvoke_method;
void * user_data;
xmlrpc_parse_value(envP, registryP->_preinvoke_method, "(pp)",
&preinvoke_method, &user_data);
if (!envP->fault_occurred)
(*preinvoke_method)(envP, methodName,
paramArrayP, user_data);
}
}
static void
callDefaultMethod(xmlrpc_env * const envP,
xmlrpc_value * const defaultMethodInfo,
const char * const methodName,
xmlrpc_value * const paramArrayP,
xmlrpc_value ** const resultPP) {
xmlrpc_default_method default_method;
void * user_data;
xmlrpc_parse_value(envP, defaultMethodInfo, "(pp)",
&default_method, &user_data);
if (!envP->fault_occurred)
*resultPP = (*default_method)(envP, NULL, methodName,
paramArrayP, user_data);
}
static void
callNamedMethod(xmlrpc_env * const envP,
xmlrpc_value * const methodInfo,
xmlrpc_value * const paramArrayP,
xmlrpc_value ** const resultPP) {
xmlrpc_method method;
void * user_data;
xmlrpc_parse_value(envP, methodInfo, "(pp*)", &method, &user_data);
if (!envP->fault_occurred)
*resultPP = (*method)(envP, paramArrayP, user_data);
}
static void
dispatch_call(xmlrpc_env * const envP,
xmlrpc_registry * const registryP,
const char * const methodName,
xmlrpc_value * const paramArrayP,
xmlrpc_value ** const resultPP) {
callPreinvokeMethodIfAny(envP, registryP, methodName, paramArrayP);
if (!envP->fault_occurred) {
xmlrpc_value * method_info;
/* Look up the method info for the named method. */
xmlrpc_struct_find_value(envP, registryP->_methods,
methodName, &method_info);
if (!envP->fault_occurred) {
if (method_info)
callNamedMethod(envP, method_info, paramArrayP, resultPP);
else {
if (registryP->_default_method)
callDefaultMethod(envP, registryP->_default_method,
methodName, paramArrayP,
resultPP);
else {
/* No matching method, and no default. */
xmlrpc_env_set_fault_formatted(
envP, XMLRPC_NO_SUCH_METHOD_ERROR,
"Method '%s' not defined", methodName);
}
}
}
}
/* For backward compatibility, for sloppy users: */
if (envP->fault_occurred)
*resultPP = NULL;
}
/*=========================================================================
** xmlrpc_registry_process_call
**=========================================================================
**
*/
xmlrpc_mem_block *
xmlrpc_registry_process_call(xmlrpc_env * const envP,
xmlrpc_registry * const registryP,
const char * const host ATTR_UNUSED,
const char * const xml_data,
size_t const xml_len) {
xmlrpc_mem_block * output;
XMLRPC_ASSERT_ENV_OK(envP);
XMLRPC_ASSERT_PTR_OK(xml_data);
xmlrpc_traceXml("XML-RPC CALL", xml_data, xml_len);
/* Allocate our output buffer.
** If this fails, we need to die in a special fashion. */
output = XMLRPC_MEMBLOCK_NEW(char, envP, 0);
if (!envP->fault_occurred) {
const char * methodName;
xmlrpc_value * paramArray;
xmlrpc_env fault;
xmlrpc_env_init(&fault);
xmlrpc_parse_call(&fault, xml_data, xml_len,
&methodName, &paramArray);
if (!fault.fault_occurred) {
xmlrpc_value * result;
dispatch_call(&fault, registryP, methodName, paramArray, &result);
if (!fault.fault_occurred) {
xmlrpc_serialize_response(envP, output, result);
/* A comment here used to say that
xmlrpc_serialize_response() could fail and "leave
stuff in the buffer." Don't know what that means,
but it sounds like something that needs to be
fixed. The old code aborted the program here if
xmlrpc_serialize_repsonse() failed. 04.11.17
*/
xmlrpc_DECREF(result);
}
xmlrpc_strfree(methodName);
xmlrpc_DECREF(paramArray);
}
if (!envP->fault_occurred && fault.fault_occurred)
xmlrpc_serialize_fault(envP, output, &fault);
xmlrpc_env_clean(&fault);
if (envP->fault_occurred)
XMLRPC_MEMBLOCK_FREE(char, output);
else
xmlrpc_traceXml("XML-RPC RESPONSE",
XMLRPC_MEMBLOCK_CONTENTS(char, output),
XMLRPC_MEMBLOCK_SIZE(char, output));
}
return output;
}
/*=========================================================================
** system.multicall
**=========================================================================
** Low-tech support for transparent, boxed methods.
*/
static char *multicall_help =
"Process an array of calls, and return an array of results. Calls should "
"be structs of the form {'methodName': string, 'params': array}. Each "
"result will either be a single-item array containg the result value, or "
"a struct of the form {'faultCode': int, 'faultString': string}. This "
"is useful when you need to make lots of small calls without lots of "
"round trips.";
static xmlrpc_value *
call_one_method(xmlrpc_env *env, xmlrpc_registry *registry,
xmlrpc_value *method_info) {
xmlrpc_value *result_val, *result;
char *method_name;
xmlrpc_value *param_array;
/* Error-handling preconditions. */
result = result_val = NULL;
/* Extract our method name and parameters. */
xmlrpc_parse_value(env, method_info, "{s:s,s:A,*}",
"methodName", &method_name,
"params", &param_array);
XMLRPC_FAIL_IF_FAULT(env);
/* Watch out for a deep recursion attack. */
if (strcmp(method_name, "system.multicall") == 0)
XMLRPC_FAIL(env, XMLRPC_REQUEST_REFUSED_ERROR,
"Recursive system.multicall strictly forbidden");
/* Perform the call. */
dispatch_call(env, registry, method_name, param_array, &result_val);
XMLRPC_FAIL_IF_FAULT(env);
/* Build our one-item result array. */
result = xmlrpc_build_value(env, "(V)", result_val);
XMLRPC_FAIL_IF_FAULT(env);
cleanup:
if (result_val)
xmlrpc_DECREF(result_val);
if (env->fault_occurred) {
if (result)
xmlrpc_DECREF(result);
return NULL;
}
return result;
}
static xmlrpc_value *
system_multicall(xmlrpc_env *env,
xmlrpc_value *param_array,
void *user_data) {
xmlrpc_registry *registry;
xmlrpc_value *methlist, *methinfo, *results, *result;
size_t size, i;
xmlrpc_env env2;
XMLRPC_ASSERT_ENV_OK(env);
XMLRPC_ASSERT_VALUE_OK(param_array);
XMLRPC_ASSERT_PTR_OK(user_data);
/* Error-handling preconditions. */
results = result = NULL;
xmlrpc_env_init(&env2);
/* Turn our arguments into something more useful. */
registry = (xmlrpc_registry*) user_data;
xmlrpc_parse_value(env, param_array, "(A)", &methlist);
XMLRPC_FAIL_IF_FAULT(env);
/* Create an empty result list. */
results = xmlrpc_build_value(env, "()");
XMLRPC_FAIL_IF_FAULT(env);
/* Loop over our input list, calling each method in turn. */
size = xmlrpc_array_size(env, methlist);
XMLRPC_ASSERT_ENV_OK(env);
for (i = 0; i < size; i++) {
methinfo = xmlrpc_array_get_item(env, methlist, i);
XMLRPC_ASSERT_ENV_OK(env);
/* Call our method. */
xmlrpc_env_clean(&env2);
xmlrpc_env_init(&env2);
result = call_one_method(&env2, registry, methinfo);
/* Turn any fault into a structure. */
if (env2.fault_occurred) {
XMLRPC_ASSERT(result == NULL);
result =
xmlrpc_build_value(env, "{s:i,s:s}",
"faultCode", (xmlrpc_int32) env2.fault_code,
"faultString", env2.fault_string);
XMLRPC_FAIL_IF_FAULT(env);
}
/* Append this method result to our master array. */
xmlrpc_array_append_item(env, results, result);
xmlrpc_DECREF(result);
result = NULL;
XMLRPC_FAIL_IF_FAULT(env);
}
cleanup:
xmlrpc_env_clean(&env2);
if (result)
xmlrpc_DECREF(result);
if (env->fault_occurred) {
if (results)
xmlrpc_DECREF(results);
return NULL;
}
return results;
}
/*=========================================================================
** system.listMethods
**=========================================================================
** List all available methods by name.
*/
static char *listMethods_help =
"Return an array of all available XML-RPC methods on this server.";
static xmlrpc_value *
system_listMethods(xmlrpc_env *env,
xmlrpc_value *param_array,
void *user_data) {
xmlrpc_registry *registry;
xmlrpc_value *method_names, *method_name, *method_info;
size_t size, i;
XMLRPC_ASSERT_ENV_OK(env);
XMLRPC_ASSERT_VALUE_OK(param_array);
XMLRPC_ASSERT_PTR_OK(user_data);
/* Error-handling preconditions. */
method_names = NULL;
/* Turn our arguments into something more useful. */
registry = (xmlrpc_registry*) user_data;
xmlrpc_parse_value(env, param_array, "()");
XMLRPC_FAIL_IF_FAULT(env);
/* Make sure we're allowed to introspect. */
if (!registry->_introspection_enabled)
XMLRPC_FAIL(env, XMLRPC_INTROSPECTION_DISABLED_ERROR,
"Introspection disabled for security reasons");
/* Iterate over all the methods in the registry, adding their names
** to a list. */
method_names = xmlrpc_build_value(env, "()");
XMLRPC_FAIL_IF_FAULT(env);
size = xmlrpc_struct_size(env, registry->_methods);
XMLRPC_FAIL_IF_FAULT(env);
for (i = 0; i < size; i++) {
xmlrpc_struct_get_key_and_value(env, registry->_methods, i,
&method_name, &method_info);
XMLRPC_FAIL_IF_FAULT(env);
xmlrpc_array_append_item(env, method_names, method_name);
XMLRPC_FAIL_IF_FAULT(env);
}
cleanup:
if (env->fault_occurred) {
if (method_names)
xmlrpc_DECREF(method_names);
return NULL;
}
return method_names;
}
/*=========================================================================
** system.methodHelp
**=========================================================================
** Get the help string for a particular method.
*/
static char *methodHelp_help =
"Given the name of a method, return a help string.";
static xmlrpc_value *
system_methodHelp(xmlrpc_env *env,
xmlrpc_value *param_array,
void *user_data) {
xmlrpc_registry *registry;
char *method_name;
xmlrpc_value *ignored1, *ignored2, *ignored3, *help;
XMLRPC_ASSERT_ENV_OK(env);
XMLRPC_ASSERT_VALUE_OK(param_array);
XMLRPC_ASSERT_PTR_OK(user_data);
/* Turn our arguments into something more useful. */
registry = (xmlrpc_registry*) user_data;
xmlrpc_parse_value(env, param_array, "(s)", &method_name);
XMLRPC_FAIL_IF_FAULT(env);
/* Make sure we're allowed to introspect. */
if (!registry->_introspection_enabled)
XMLRPC_FAIL(env, XMLRPC_INTROSPECTION_DISABLED_ERROR,
"Introspection disabled for security reasons");
/* Get our documentation string. */
xmlrpc_parse_value(env, registry->_methods, "{s:(VVVV*),*}",
method_name, &ignored1, &ignored2, &ignored3, &help);
XMLRPC_FAIL_IF_FAULT(env);
cleanup:
if (env->fault_occurred)
return NULL;
xmlrpc_INCREF(help);
return help;
}
/*=========================================================================
** system.methodSignature
**=========================================================================
** Return an array of arrays describing possible signatures for this
** method.
**
** XXX - This is the ugliest function in the entire library.
*/
static char *methodSignature_help =
"Given the name of a method, return an array of legal signatures. "
"Each signature is an array of strings. The first item of each signature "
"is the return type, and any others items are parameter types.";
static char *bad_sig_str =
"Application has incorrect method signature information";
#define BAD_SIG(env) \
XMLRPC_FAIL((env), XMLRPC_INTERNAL_ERROR, bad_sig_str);
static xmlrpc_value *
system_methodSignature(xmlrpc_env *env,
xmlrpc_value *param_array,
void *user_data) {
xmlrpc_registry *registry;
char *method_name;
xmlrpc_value *ignored1, *ignored2, *ignored3;
xmlrpc_value *item, *current, *result;
int at_sig_start;
char *sig, *code;
XMLRPC_ASSERT_ENV_OK(env);
XMLRPC_ASSERT_VALUE_OK(param_array);
XMLRPC_ASSERT_PTR_OK(user_data);
/* Error-handling preconditions. */
item = current = result = NULL;
/* Turn our arguments into something more useful. */
registry = (xmlrpc_registry*) user_data;
xmlrpc_parse_value(env, param_array, "(s)", &method_name);
XMLRPC_FAIL_IF_FAULT(env);
/* Make sure we're allowed to introspect. */
if (!registry->_introspection_enabled)
XMLRPC_FAIL(env, XMLRPC_INTROSPECTION_DISABLED_ERROR,
"Introspection disabled for security reasons");
/* Get our signature string. */
xmlrpc_parse_value(env, registry->_methods, "{s:(VVsV*),*}",
method_name, &ignored1, &ignored2, &sig, &ignored3);
XMLRPC_FAIL_IF_FAULT(env);
if (sig[0] == '?' && sig[1] == '\0') {
/* No signature supplied. */
result = xmlrpc_build_value(env, "s", "undef");
XMLRPC_FAIL_IF_FAULT(env);
} else {
/* Build an array of arrays. */
current = xmlrpc_build_value(env, "()");
XMLRPC_FAIL_IF_FAULT(env);
result = xmlrpc_build_value(env, "(V)", current);
XMLRPC_FAIL_IF_FAULT(env);
at_sig_start = 1;
do {
next_loop:
/* Process the current code. */
switch (*(sig++)) {
case 'i': code = "int"; break;
case 'b': code = "boolean"; break;
case 'd': code = "double"; break;
case 's': code = "string"; break;
case '8': code = "dateTime.iso8601"; break;
case '6': code = "base64"; break;
case 'S': code = "struct"; break;
case 'A': code = "array"; break;
case ',':
/* Start a new signature array. */
if (at_sig_start)
BAD_SIG(env);
xmlrpc_DECREF(current);
current = xmlrpc_build_value(env, "()");
XMLRPC_FAIL_IF_FAULT(env);
xmlrpc_array_append_item(env, result, current);
XMLRPC_FAIL_IF_FAULT(env);
at_sig_start = 1;
goto next_loop;
default:
BAD_SIG(env);
}
/* Append the appropriate string to our current signature. */
item = xmlrpc_build_value(env, "s", code);
XMLRPC_FAIL_IF_FAULT(env);
xmlrpc_array_append_item(env, current, item);
xmlrpc_DECREF(item);
item = NULL;
XMLRPC_FAIL_IF_FAULT(env);
/* Advance to the next code, and skip over ':' if necessary. */
if (at_sig_start) {
if (*sig != ':')
BAD_SIG(env);
sig++;
at_sig_start = 0;
}
} while (*sig != '\0');
}
cleanup:
if (item)
xmlrpc_DECREF(item);
if (current)
xmlrpc_DECREF(current);
if (env->fault_occurred) {
if (result)
xmlrpc_DECREF(result);
return NULL;
}
return result;
}
/*=========================================================================
** install_system_methods
**=========================================================================
** Install the standard methods under system.*.
** This particular function is highly experimental, and may disappear
** without warning.
*/
static void
install_system_methods(xmlrpc_env *env, xmlrpc_registry *registry) {
xmlrpc_registry_add_method_w_doc(env, registry, NULL,
"system.listMethods",
&system_listMethods, registry,
"A:", listMethods_help);
XMLRPC_FAIL_IF_FAULT(env);
xmlrpc_registry_add_method_w_doc(env, registry, NULL,
"system.methodSignature",
&system_methodSignature, registry,
"A:s", methodSignature_help);
XMLRPC_FAIL_IF_FAULT(env);
xmlrpc_registry_add_method_w_doc(env, registry, NULL,
"system.methodHelp",
&system_methodHelp, registry,
"s:s", methodHelp_help);
XMLRPC_FAIL_IF_FAULT(env);
xmlrpc_registry_add_method_w_doc(env, registry, NULL,
"system.multicall",
&system_multicall, registry,
"A:A", multicall_help);
XMLRPC_FAIL_IF_FAULT(env);
cleanup:
return;
}
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