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MaxScale/server/core/load_utils.c
Johan Wikman 62aa1ea5d7 Remove module to be freed from list. 
When a module is unregistered, it must be removed from the list.
Otherwise, if explicit unregistering of a module is made, there
will be a crash at shutdown when all modules are unregistered.
2016-02-12 10:15:06 +02:00

901 lines
26 KiB
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/*
* This file is distributed as part of the MariaDB Corporation MaxScale. It 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,
* version 2.
*
* 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., 51
* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Copyright MariaDB Corporation Ab 2013-2014
*/
/**
* @file load_utils.c Utility functions to aid the loading of dynamic
* modules into the gateway
*
* @verbatim
* Revision History
*
* Date Who Description
* 13/06/13 Mark Riddoch Initial implementation
* 14/06/13 Mark Riddoch Updated to add call to ModuleInit if one is
* defined in the loaded module.
* Also updated to call fixed GetModuleObject
* 02/06/14 Mark Riddoch Addition of module info
* 26/02/15 Massimiliano Pinto Addition of module_feedback_send
*
* @endverbatim
*/
#include <sys/param.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <dlfcn.h>
#include <modules.h>
#include <modinfo.h>
#include <skygw_utils.h>
#include <log_manager.h>
#include <version.h>
#include <notification.h>
#include <curl/curl.h>
#include <sys/utsname.h>
#include <openssl/sha.h>
#include <gw.h>
#include <gwdirs.h>
static MODULES *registered = NULL;
static MODULES *find_module(const char *module);
static void register_module(const char *module,
const char *type,
void *dlhandle,
char *version,
void *modobj,
MODULE_INFO *info);
static void unregister_module(const char *module);
int module_create_feedback_report(GWBUF **buffer, MODULES *modules, FEEDBACK_CONF *cfg);
int do_http_post(GWBUF *buffer, void *cfg);
struct MemoryStruct
{
char *data;
size_t size;
};
/**
* Callback write routine for curl library, getting remote server reply
*
* @param contents New data to add
* @param size Data size
* @param nmemb Elements in the buffer
* @param userp Pointer to the buffer
* @return 0 on failure, memory size on success
*
*/
static size_t
WriteMemoryCallback(void *contents, size_t size, size_t nmemb, void *userp)
{
size_t realsize = size * nmemb;
struct MemoryStruct *mem = (struct MemoryStruct *)userp;
mem->data = realloc(mem->data, mem->size + realsize + 1);
if (mem->data == NULL)
{
/* out of memory! */
MXS_ERROR("Error in module_feedback_send(), not enough memory for realloc");
return 0;
}
memcpy(&(mem->data[mem->size]), contents, realsize);
mem->size += realsize;
mem->data[mem->size] = 0;
return realsize;
}
/**
* Load the dynamic library related to a gateway module. The routine
* will look for library files in the current directory,
* the configured folder and /usr/lib64/maxscale.
*
* @param module Name of the module to load
* @param type Type of module, used purely for registration
* @return The module specific entry point structure or NULL
*/
void *
load_module(const char *module, const char *type)
{
char *home, *version;
char fname[MAXPATHLEN+1];
void *dlhandle, *sym;
char *(*ver)();
void *(*ep)(), *modobj;
MODULES *mod;
MODULE_INFO *mod_info = NULL;
if ((mod = find_module(module)) == NULL)
{
/*<
* The module is not already loaded
*
* Search of the shared object.
*/
snprintf(fname, MAXPATHLEN+1,"%s/lib%s.so", get_libdir(), module);
if (access(fname, F_OK) == -1)
{
MXS_ERROR("Unable to find library for "
"module: %s. Module dir: %s",
module, get_libdir());
return NULL;
}
if ((dlhandle = dlopen(fname, RTLD_NOW|RTLD_LOCAL)) == NULL)
{
MXS_ERROR("Unable to load library for module: "
"%s\n\n\t\t %s."
"\n\n",
module,
dlerror());
return NULL;
}
if ((sym = dlsym(dlhandle, "version")) == NULL)
{
MXS_ERROR("Version interface not supported by "
"module: %s\n\t\t\t %s.",
module,
dlerror());
dlclose(dlhandle);
return NULL;
}
ver = sym;
version = ver();
/*
* If the module has a ModuleInit function cal it now.
*/
if ((sym = dlsym(dlhandle, "ModuleInit")) != NULL)
{
void (*ModuleInit)() = sym;
ModuleInit();
}
if ((sym = dlsym(dlhandle, "info")) != NULL)
{
int fatal = 0;
mod_info = sym;
if (strcmp(type, MODULE_PROTOCOL) == 0
&& mod_info->modapi != MODULE_API_PROTOCOL)
{
MXS_ERROR("Module '%s' does not implement the protocol API.", module);
fatal = 1;
}
if (strcmp(type, MODULE_ROUTER) == 0
&& mod_info->modapi != MODULE_API_ROUTER)
{
MXS_ERROR("Module '%s' does not implement the router API.", module);
fatal = 1;
}
if (strcmp(type, MODULE_MONITOR) == 0
&& mod_info->modapi != MODULE_API_MONITOR)
{
MXS_ERROR("Module '%s' does not implement the monitor API.", module);
fatal = 1;
}
if (strcmp(type, MODULE_FILTER) == 0
&& mod_info->modapi != MODULE_API_FILTER)
{
MXS_ERROR("Module '%s' does not implement the filter API.", module);
fatal = 1;
}
if (strcmp(type, MODULE_QUERY_CLASSIFIER) == 0
&& mod_info->modapi != MODULE_API_QUERY_CLASSIFIER)
{
MXS_ERROR("Module '%s' does not implement the query classifier API.", module);
fatal = 1;
}
if (fatal)
{
dlclose(dlhandle);
return NULL;
}
}
if ((sym = dlsym(dlhandle, "GetModuleObject")) == NULL)
{
MXS_ERROR("Expected entry point interface missing "
"from module: %s\n\t\t\t %s.",
module,
dlerror());
dlclose(dlhandle);
return NULL;
}
ep = sym;
modobj = ep();
MXS_NOTICE("Loaded module %s: %s from %s",
module,
version,
fname);
register_module(module, type, dlhandle, version, modobj, mod_info);
}
else
{
/*
* The module is already loaded, get the entry points again and
* return a reference to the already loaded module.
*/
modobj = mod->modobj;
}
return modobj;
}
/**
* Unload a module.
*
* No errors are returned since it is not clear that much can be done
* to fix issues relating to unloading modules.
*
* @param module The name of the module
*/
void
unload_module(const char *module)
{
MODULES *mod = find_module(module);
void *handle;
if (!mod)
{
return;
}
handle = mod->handle;
unregister_module(module);
dlclose(handle);
}
/**
* Find a module that has been previously loaded and return the handle for that
* library
*
* @param module The name of the module
* @return The module handle or NULL if it was not found
*/
static MODULES *
find_module(const char *module)
{
MODULES *mod = registered;
while (mod)
{
if (strcmp(mod->module, module) == 0)
{
return mod;
}
else
{
mod = mod->next;
}
}
return NULL;
}
/**
* Register a newly loaded module. The registration allows for single copies
* to be loaded and cached entry point information to be return.
*
* @param module The name of the module loaded
* @param type The type of the module loaded
* @param dlhandle The handle returned by dlopen
* @param version The version string returned by the module
* @param modobj The module object
* @param mod_info The module information
*/
static void
register_module(const char *module,
const char *type,
void *dlhandle,
char *version,
void *modobj,
MODULE_INFO *mod_info)
{
MODULES *mod;
if ((mod = malloc(sizeof(MODULES))) == NULL)
{
return;
}
mod->module = strdup(module);
mod->type = strdup(type);
mod->handle = dlhandle;
mod->version = strdup(version);
mod->modobj = modobj;
mod->next = registered;
mod->info = mod_info;
registered = mod;
}
/**
* Unregister a module
*
* @param module The name of the module to remove
*/
static void
unregister_module(const char *module)
{
MODULES *mod = find_module(module);
MODULES *ptr;
if (!mod)
{
return; // Module not found
}
if (registered == mod)
{
registered = mod->next;
}
else
{
ptr = registered;
while (ptr && ptr->next != mod)
{
ptr = ptr->next;
}
/*<
* Remove the module to be be freed from the list.
*/
if (ptr && (ptr->next == mod))
{
ptr->next = ptr->next->next;
}
}
/*<
* The module is now not in the linked list and all
* memory related to it can be freed
*/
dlclose(mod->handle);
free(mod->module);
free(mod->type);
free(mod->version);
free(mod);
}
/**
* Unload all modules
*
* Remove all the modules from the system, called during shutdown
* to allow termination hooks to be called.
*/
void
unload_all_modules()
{
while (registered)
{
unregister_module(registered->module);
}
}
/**
* Print Modules
*
* Diagnostic routine to display all the loaded modules
*/
void
printModules()
{
MODULES *ptr = registered;
printf("%-15s | %-11s | Version\n", "Module Name", "Module Type");
printf("-----------------------------------------------------\n");
while (ptr)
{
printf("%-15s | %-11s | %s\n", ptr->module, ptr->type, ptr->version);
ptr = ptr->next;
}
}
/**
* Print Modules to a DCB
*
* Diagnostic routine to display all the loaded modules
*/
void
dprintAllModules(DCB *dcb)
{
MODULES *ptr = registered;
dcb_printf(dcb, "Modules.\n");
dcb_printf(dcb, "----------------+-------------+---------+-------+-------------------------\n");
dcb_printf(dcb, "%-15s | %-11s | Version | API | Status\n", "Module Name", "Module Type");
dcb_printf(dcb, "----------------+-------------+---------+-------+-------------------------\n");
while (ptr)
{
dcb_printf(dcb, "%-15s | %-11s | %-7s ", ptr->module, ptr->type, ptr->version);
if (ptr->info)
dcb_printf(dcb, "| %d.%d.%d | %s",
ptr->info->api_version.major,
ptr->info->api_version.minor,
ptr->info->api_version.patch,
ptr->info->status == MODULE_IN_DEVELOPMENT
? "In Development"
: (ptr->info->status == MODULE_ALPHA_RELEASE
? "Alpha"
: (ptr->info->status == MODULE_BETA_RELEASE
? "Beta"
: (ptr->info->status == MODULE_GA
? "GA"
: (ptr->info->status == MODULE_EXPERIMENTAL
? "Experimental" : "Unknown")))));
dcb_printf(dcb, "\n");
ptr = ptr->next;
}
dcb_printf(dcb, "----------------+-------------+---------+-------+-------------------------\n\n");
}
/**
* Print Modules to a DCB
*
* Diagnostic routine to display all the loaded modules
*/
void
moduleShowFeedbackReport(DCB *dcb)
{
GWBUF *buffer;
MODULES *modules_list = registered;
FEEDBACK_CONF *feedback_config = config_get_feedback_data();
if (!module_create_feedback_report(&buffer, modules_list, feedback_config))
{
MXS_ERROR("Error in module_create_feedback_report(): gwbuf_alloc() failed to allocate memory");
return;
}
dcb_printf(dcb, (char *)GWBUF_DATA(buffer));
gwbuf_free(buffer);
}
/**
* Provide a row to the result set that defines the set of modules
*
* @param set The result set
* @param data The index of the row to send
* @return The next row or NULL
*/
static RESULT_ROW *
moduleRowCallback(RESULTSET *set, void *data)
{
int *rowno = (int *)data;
int i = 0;;
char *stat, buf[20];
RESULT_ROW *row;
MODULES *ptr;
ptr = registered;
while (i < *rowno && ptr)
{
i++;
ptr = ptr->next;
}
if (ptr == NULL)
{
free(data);
return NULL;
}
(*rowno)++;
row = resultset_make_row(set);
resultset_row_set(row, 0, ptr->module);
resultset_row_set(row, 1, ptr->type);
resultset_row_set(row, 2, ptr->version);
snprintf(buf,19, "%d.%d.%d", ptr->info->api_version.major,
ptr->info->api_version.minor,
ptr->info->api_version.patch);
buf[19] = '\0';
resultset_row_set(row, 3, buf);
resultset_row_set(row, 4, ptr->info->status == MODULE_IN_DEVELOPMENT
? "In Development"
: (ptr->info->status == MODULE_ALPHA_RELEASE
? "Alpha"
: (ptr->info->status == MODULE_BETA_RELEASE
? "Beta"
: (ptr->info->status == MODULE_GA
? "GA"
: (ptr->info->status == MODULE_EXPERIMENTAL
? "Experimental" : "Unknown")))));
return row;
}
/**
* Return a resultset that has the current set of modules in it
*
* @return A Result set
*/
RESULTSET *
moduleGetList()
{
RESULTSET *set;
int *data;
if ((data = (int *)malloc(sizeof(int))) == NULL)
{
return NULL;
}
*data = 0;
if ((set = resultset_create(moduleRowCallback, data)) == NULL)
{
free(data);
return NULL;
}
resultset_add_column(set, "Module Name", 18, COL_TYPE_VARCHAR);
resultset_add_column(set, "Module Type", 12, COL_TYPE_VARCHAR);
resultset_add_column(set, "Version", 10, COL_TYPE_VARCHAR);
resultset_add_column(set, "API Version", 8, COL_TYPE_VARCHAR);
resultset_add_column(set, "Status", 15, COL_TYPE_VARCHAR);
return set;
}
/**
* Send loaded modules info to notification service
*
* @param data The configuration details of notification service
*/
void
module_feedback_send(void* data)
{
MODULES *modules_list = registered;
CURL *curl = NULL;
CURLcode res;
struct curl_httppost *formpost=NULL;
struct curl_httppost *lastptr=NULL;
GWBUF *buffer = NULL;
void *data_ptr=NULL;
long http_code = 0;
int last_action = _NOTIFICATION_SEND_PENDING;
time_t now;
struct tm *now_tm;
int hour;
int n_mod=0;
char hex_setup_info[2 * SHA_DIGEST_LENGTH + 1]="";
int http_send = 0;
now = time(NULL);
struct tm now_result;
now_tm = localtime_r(&now, &now_result);
hour = now_tm->tm_hour;
FEEDBACK_CONF *feedback_config = (FEEDBACK_CONF *) data;
/* Configuration check */
if (feedback_config->feedback_enable == 0 ||
feedback_config->feedback_url == NULL ||
feedback_config->feedback_user_info == NULL)
{
MXS_ERROR("Error in module_feedback_send(): some mandatory parameters are not set"
" feedback_enable=%u, feedback_url=%s, feedback_user_info=%s",
feedback_config->feedback_enable,
feedback_config->feedback_url == NULL ? "NULL" : feedback_config->feedback_url,
feedback_config->feedback_user_info == NULL ?
"NULL" : feedback_config->feedback_user_info);
feedback_config->feedback_last_action = _NOTIFICATION_SEND_ERROR;
return;
}
/**
* Task runs nightly, from 2 AM to 4 AM
*
* If it's done in that time interval, it will be skipped
*/
if (hour > 4 || hour < 2)
{
/* It's not the rigt time, mark it as to be done and return */
feedback_config->feedback_last_action = _NOTIFICATION_SEND_PENDING;
MXS_INFO("module_feedback_send(): execution skipped, current hour [%d]"
" is not within the proper interval (from 2 AM to 4 AM)",
hour);
return;
}
/* Time to run the task: if a previous run was succesfull skip next runs */
if (feedback_config->feedback_last_action == _NOTIFICATION_SEND_OK)
{
/* task was done before, return */
MXS_INFO("module_feedback_send(): execution skipped because of previous "
"succesful run: hour is [%d], last_action [%d]",
hour, feedback_config->feedback_last_action);
return;
}
MXS_INFO("module_feedback_send(): task now runs: hour is [%d], last_action [%d]",
hour, feedback_config->feedback_last_action);
if (!module_create_feedback_report(&buffer, modules_list, feedback_config))
{
MXS_ERROR("Error in module_create_feedback_report(): gwbuf_alloc() failed to allocate memory");
feedback_config->feedback_last_action = _NOTIFICATION_SEND_ERROR;
return;
}
/* try sending data via http/https post */
http_send = do_http_post(buffer, feedback_config);
if (http_send == 0)
{
feedback_config->feedback_last_action = _NOTIFICATION_SEND_OK;
}
else
{
feedback_config->feedback_last_action = _NOTIFICATION_SEND_ERROR;
MXS_INFO("Error in module_create_feedback_report(): do_http_post ret_code is %d", http_send);
}
MXS_INFO("module_feedback_send(): task completed: hour is [%d], last_action [%d]",
hour,
feedback_config->feedback_last_action);
gwbuf_free(buffer);
}
/**
* Create the feedback report as string.
* I t could be sent to notification service
* or just printed via maxadmin/telnet
*
* @param buffe The pointr for GWBUF allocation, to be freed by the caller
* @param modules The mouleds list
* @param cfg The feedback configuration
* @return 0 on failure, 1 on success
*
*/
int
module_create_feedback_report(GWBUF **buffer, MODULES *modules, FEEDBACK_CONF *cfg)
{
MODULES *ptr = modules;
int n_mod = 0;
char *data_ptr=NULL;
char hex_setup_info[2 * SHA_DIGEST_LENGTH + 1]="";
time_t now;
struct tm *now_tm;
int report_max_bytes=0;
if (buffer == NULL)
{
return 0;
}
now = time(NULL);
/* count loaded modules */
while (ptr)
{
ptr = ptr->next;
n_mod++;
}
/* module lists pointer is set back to the head */
ptr = modules;
/**
* allocate gwbuf for data to send
*
* each module gives 4 rows
* product and release rows add 7 rows
* row is _NOTIFICATION_REPORT_ROW_LEN bytes long
*/
report_max_bytes = ((n_mod * 4) + 7) * (_NOTIFICATION_REPORT_ROW_LEN + 1);
*buffer = gwbuf_alloc(report_max_bytes);
if (*buffer == NULL)
{
return 0;
}
/* encode MAC-sha1 to HEX */
gw_bin2hex(hex_setup_info, cfg->mac_sha1, SHA_DIGEST_LENGTH);
data_ptr = (char *)GWBUF_DATA(*buffer);
snprintf(data_ptr, _NOTIFICATION_REPORT_ROW_LEN, "FEEDBACK_SERVER_UID\t%s\n", hex_setup_info);
data_ptr += strlen(data_ptr);
snprintf(data_ptr, _NOTIFICATION_REPORT_ROW_LEN, "FEEDBACK_USER_INFO\t%s\n",
cfg->feedback_user_info == NULL ? "not_set" : cfg->feedback_user_info);
data_ptr += strlen(data_ptr);
snprintf(data_ptr, _NOTIFICATION_REPORT_ROW_LEN, "VERSION\t%s\n", MAXSCALE_VERSION);
data_ptr += strlen(data_ptr);
snprintf(data_ptr, _NOTIFICATION_REPORT_ROW_LEN * 2, "NOW\t%lu\nPRODUCT\t%s\n", now, "maxscale");
data_ptr += strlen(data_ptr);
snprintf(data_ptr, _NOTIFICATION_REPORT_ROW_LEN, "Uname_sysname\t%s\n", cfg->sysname);
data_ptr += strlen(data_ptr);
snprintf(data_ptr, _NOTIFICATION_REPORT_ROW_LEN, "Uname_distribution\t%s\n", cfg->release_info);
data_ptr += strlen(data_ptr);
while (ptr)
{
snprintf(data_ptr, _NOTIFICATION_REPORT_ROW_LEN * 2,
"module_%s_type\t%s\nmodule_%s_version\t%s\n",
ptr->module, ptr->type, ptr->module, ptr->version);
data_ptr += strlen(data_ptr);
if (ptr->info)
{
snprintf(data_ptr, _NOTIFICATION_REPORT_ROW_LEN, "module_%s_api\t%d.%d.%d\n",
ptr->module,
ptr->info->api_version.major,
ptr->info->api_version.minor,
ptr->info->api_version.patch);
data_ptr += strlen(data_ptr);
snprintf(data_ptr, _NOTIFICATION_REPORT_ROW_LEN, "module_%s_releasestatus\t%s\n",
ptr->module,
ptr->info->status == MODULE_IN_DEVELOPMENT
? "In Development"
: (ptr->info->status == MODULE_ALPHA_RELEASE
? "Alpha"
: (ptr->info->status == MODULE_BETA_RELEASE
? "Beta"
: (ptr->info->status == MODULE_GA
? "GA"
: (ptr->info->status == MODULE_EXPERIMENTAL
? "Experimental" : "Unknown")))));
data_ptr += strlen(data_ptr);
}
ptr = ptr->next;
}
return 1;
}
/**
* Send data to notification service via http/https
*
* @param buffer The GWBUF with data to send
* @param cfg The configuration details of notification service
* @return 0 on success, != 0 on failure
*/
int
do_http_post(GWBUF *buffer, void *cfg)
{
CURL *curl = NULL;
CURLcode res;
struct curl_httppost *formpost=NULL;
struct curl_httppost *lastptr=NULL;
long http_code = 0;
struct MemoryStruct chunk;
int ret_code = 1;
FEEDBACK_CONF *feedback_config = (FEEDBACK_CONF *) cfg;
/* allocate first memory chunck for httpd servr reply */
chunk.data = malloc(1); /* will be grown as needed by the realloc above */
chunk.size = 0; /* no data at this point */
/* Initializing curl library for data send via HTTP */
curl_global_init(CURL_GLOBAL_DEFAULT);
curl = curl_easy_init();
if (curl) {
char error_message[CURL_ERROR_SIZE]="";
curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, error_message);
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, feedback_config->feedback_connect_timeout);
curl_easy_setopt(curl, CURLOPT_TIMEOUT, feedback_config->feedback_timeout);
/* curl API call for data send via HTTP POST using a "file" type input */
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, "data",
CURLFORM_BUFFER, "report.txt",
CURLFORM_BUFFERPTR, (char *)GWBUF_DATA(buffer),
CURLFORM_BUFFERLENGTH, strlen((char *)GWBUF_DATA(buffer)),
CURLFORM_CONTENTTYPE, "text/plain",
CURLFORM_END);
curl_easy_setopt(curl, CURLOPT_HEADER, 1);
/* some servers don't like requests that are made without a user-agent field, so we provide one */
curl_easy_setopt(curl, CURLOPT_USERAGENT, "MaxScale-agent/http-1.0");
/* Force HTTP/1.0 */
curl_easy_setopt(curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
curl_easy_setopt(curl, CURLOPT_URL, feedback_config->feedback_url);
curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
/* send all data to this function */
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
/* we pass our 'chunk' struct to the callback function */
curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&chunk);
/* Perform the request, res will get the return code */
res = curl_easy_perform(curl);
/* Check for errors */
if (res != CURLE_OK)
{
ret_code = 2;
MXS_ERROR("do_http_post(), curl call for [%s] failed due: %s, %s",
feedback_config->feedback_url,
curl_easy_strerror(res),
error_message);
goto cleanup;
}
else
{
curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &http_code);
}
if (http_code == 302)
{
char *from = strstr(chunk.data, "<h1>ok</h1>");
if (from)
{
ret_code = 0;
}
else
{
ret_code = 3;
goto cleanup;
}
}
else
{
MXS_ERROR("do_http_post(), Bad HTTP Code from remote server: %lu", http_code);
ret_code = 4;
goto cleanup;
}
}
else
{
MXS_ERROR("do_http_post(), curl object not initialized");
ret_code = 1;
goto cleanup;
}
MXS_INFO("do_http_post() ret_code [%d], HTTP code [%ld]",
ret_code, http_code);
cleanup:
if (chunk.data)
{
free(chunk.data);
}
if (curl)
{
curl_easy_cleanup(curl);
curl_formfree(formpost);
}
curl_global_cleanup();
return ret_code;
}
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