1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/*****************************************************************************
* @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_data = "{ macaddr=" + hwaddr + "&yiaddr=" + yiaddr + "&msg=" + msg_name + "}";
final_url = json_params[0] + hwaddr;
LOG_DEBUG(logger, 0, "SNL_BASE").arg(final_url);
LOG_DEBUG(logger, 0, "SNL_BASE").arg(yiaddr);
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, "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);
// If we don't set a timeout, curl will try for 300 seconds by default.
curl_opt_res += curl_easy_setopt(curl, CURLOPT_TIMEOUT, 1L);
curl_opt_res += curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 1L);
// libcurl's docs say to cast as void, don't blame me.
curl_opt_res += curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)response_memfile);
// CURLOPT_URL takes a char*
curl_opt_res += curl_easy_setopt(curl, CURLOPT_URL, (final_url).c_str());
// let curl use strlen
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);
}
}
|
