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/*****************************************************************************
* @file
* main function to process ipv4 packets
* -------
*
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
****************************************************************************/
#include <dhcp/pkt4.h>
#include <log/logger.h>
#include <log/macros.h>
#include <log/message_initializer.h>
#include "library_common.h"
#include <curl/curl.h>
#include <sstream>
using namespace isc::dhcp;
using namespace isc::hooks;
using namespace std;
using namespace isc::log;
namespace pt = boost::property_tree;
isc::log::Logger logger("sdnc-notify-logger");
const char* log_messages[] = {
"SNL_BASE", "message: %1",
"SNL_PKT_SEND", "Outgoing packet: \n%1",
"SNL_CURL_RECEIVED", "Received: \n%1",
"SNL_CURL_FAILED", "Unable to receive data from %1",
NULL
};
/// Initializer for log messages.
const MessageInitializer message_initializer(log_messages);
extern "C" {
int pkt4_send(CalloutHandle& handle) {
// Curl variables
CURL *curl;
CURLcode res;
struct curl_slist *list=NULL;
bool perform_updates = 0;
int curl_opt_res = 0;
// "C" variables.
char *bp;
size_t size;
FILE *response_memfile;
// String variables
string hwaddr;
string final_url;
string msg_name;
string yiaddr;
string post_data;
// Pkt4 variables.
Pkt4Ptr response4_ptr;
HWAddrPtr hwaddr_ptr;
// Boost / json related variables.
pt::ptree root;
std::stringstream ss;
boost::optional<std::string> siaddr_json_field;
/* Begin Code */
handle.getArgument("response4", response4_ptr);
hwaddr_ptr = response4_ptr->getHWAddr();
isc::asiolink::IOAddress new_yiaddr(response4_ptr->getYiaddr());
hwaddr = hwaddr_ptr->toText(false);
yiaddr = new_yiaddr.toText();
msg_name = response4_ptr->getName();
/* POST string for DMaaP */
post_data = "{\n\"macaddr\":\"" + hwaddr + "\",\n\"yiaddr\":\"" + yiaddr + "\",\n\"msg_name\":\"" + msg_name + "\"\n}";
final_url = json_params[0] ;
LOG_DEBUG(logger, 0, "SNL_BASE").arg(final_url);
LOG_DEBUG(logger, 0, "SNL_BASE").arg(yiaddr);
LOG_DEBUG(logger, 0, "SNL_BASE").arg(post_data);
if ( msg_name == "DHCPACK")
perform_updates = 1;
if (!perform_updates) {
LOG_WARN(logger, "SNL_BASE").arg("Nothing to update.");
return(0);
}
curl_global_init(CURL_GLOBAL_DEFAULT);
curl = curl_easy_init();
if(!curl) {
curl_global_cleanup();
LOG_ERROR(logger, "SNL_BASE").arg("Could not initialize curl");
return(1);
}
list = curl_slist_append(list, "Content-type: application/json");
list = curl_slist_append(list, "Accept: application/json");
if (list == NULL) {
curl_easy_cleanup(curl);
curl_global_cleanup();
LOG_ERROR(logger, "SNL_BASE").arg("Could not create curl slist.");
return(1);
}
response_memfile = open_memstream (&bp, &size);
if (response_memfile == NULL) {
curl_easy_cleanup(curl);
curl_global_cleanup();
LOG_ERROR(logger, "SNL_BASE").arg("Could not create memfile.");
return(1);
}
// DEBUGGING
curl_opt_res += curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
curl_opt_res += curl_easy_setopt(curl, CURLOPT_HEADER, 1L);
// Default curl timeout is 300 seconds
curl_opt_res += curl_easy_setopt(curl, CURLOPT_TIMEOUT, 1L);
curl_opt_res += curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 1L);
curl_opt_res += curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)response_memfile);
curl_opt_res += curl_easy_setopt(curl, CURLOPT_URL, (final_url).c_str());
curl_opt_res += curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, -1L );
curl_opt_res += curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post_data.c_str() );
curl_opt_res += curl_easy_setopt(curl, CURLOPT_HTTPHEADER, list);
#ifdef SKIP_PEER_VERIFICATION
curl_opt_res += curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
#endif
#ifdef SKIP_HOSTNAME_VERIFICATION
curl_opt_res += curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
#endif
if (curl_opt_res > 0) {
fclose(response_memfile);
free(bp);
curl_easy_cleanup(curl);
curl_global_cleanup();
LOG_ERROR(logger, "SNL_BASE").arg("Error setting curl options.");
return(1);
}
res = curl_easy_perform(curl);
/* Check for errors */
if(res != CURLE_OK) {
fclose(response_memfile);
free(bp);
curl_easy_cleanup(curl);
curl_global_cleanup();
LOG_ERROR(logger, "SNL_CURL_FAILED").arg(ss.str());
return(1);
}
// make bp available for reading.
fclose(response_memfile);
curl_easy_cleanup(curl);
curl_global_cleanup();
ss << bp;
free(bp);
LOG_DEBUG(logger, 0, "SNL_CURL_RECEIVED").arg(ss.str());
// Load the json file in this ptree
LOG_DEBUG(logger, 0, "SNL_PKT_SEND").arg(response4_ptr->toText());
return(0);
}
}
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