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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/**********************************************************************************************************
* Software License Agreement(BSD License) *
* Author: Thomas Klausner <tk@giga.or.at> *
* *
* Copyright(c) 2019, Thomas Klausner *
* All rights reserved. *
* *
* Written under contract by Effortel Technologies SA, http://effortel.com/ *
* *
* Redistribution and use of this software in source and binary forms, with or without modification, are *
* permitted provided that the following conditions are met: *
* *
* * Redistributions of source code must retain the above *
* copyright notice, this list of conditions and the *
* following disclaimer. *
* *
* * 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. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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. *
**********************************************************************************************************/
/* This extension simply receives CCR and sends CCA after displaying the content, but does not store any data */
#include <freeDiameter/extension.h>
struct disp_hdl *ccr_handler_hdl;
struct dict_object * aai_avp_do; /* cache the Auth-Application-Id dictionary object */
struct dict_object * crn_avp_do; /* cache the CC-Request-Number dictionary object */
struct dict_object * crt_avp_do; /* cache the CC-Request-Type dictionary object */
#define MODULE_NAME "test_cc"
struct statistics {
uint64_t sent;
time_t first;
time_t last;
} statistics;
void print_statistics(void) {
if (statistics.first == 0 || statistics.last == 0 || statistics.last == statistics.first) {
return;
}
fd_log_error("%s: %lld CCA messages sent in %llds (%.2f messages/second)", fd_g_config->cnf_diamid,
(long long)statistics.sent, (long long)(statistics.last-statistics.first), (float)statistics.sent / (statistics.last-statistics.first));
}
static int ccr_handler(struct msg ** msg, struct avp * avp, struct session * sess, void * data, enum disp_action * act)
{
struct msg_hdr *hdr = NULL;
time_t now;
TRACE_ENTRY("%p %p %p %p", msg, avp, sess, act);
if(msg == NULL)
return EINVAL;
CHECK_FCT(fd_msg_hdr(*msg, &hdr));
if(hdr->msg_flags & CMD_FLAG_REQUEST) {
/* Request received, answer it */
struct msg *answer;
os0_t s;
size_t sl;
struct avp *avp;
union avp_value val;
struct avp *avp_data;
struct avp_hdr *ahdr;
uint32_t crt, crn;
/* get some necessary information from request */
if (fd_msg_search_avp(*msg, crt_avp_do, &avp_data) < 0 || avp_data == NULL) {
fd_log_error("[%s] CC-Request-Type not found in CCR", MODULE_NAME);
return 0;
}
if (fd_msg_avp_hdr(avp_data, &ahdr) < 0) {
fd_log_error("[%s] error parsing CC-Request-Type in CCR", MODULE_NAME);
return 0;
}
crt = ahdr->avp_value->i32;
if (fd_msg_search_avp(*msg, crn_avp_do, &avp_data) < 0 || avp_data == NULL) {
fd_log_error("[%s] CC-Request-Number not found in CCR", MODULE_NAME);
return 0;
}
if (fd_msg_avp_hdr(avp_data, &ahdr) < 0) {
fd_log_error("[%s] error parsing CC-Request-Type in CCR", MODULE_NAME);
return 0;
}
crn = ahdr->avp_value->i32;
/* Create the answer message */
CHECK_FCT(fd_msg_new_answer_from_req(fd_g_config->cnf_dict, msg, 0));
answer = *msg;
/* TODO copy/fill in more AVPs in the answer */
/* Auth-Application-Id */
fd_msg_avp_new(aai_avp_do, 0, &avp);
memset(&val, 0, sizeof(val));
val.i32 = 4;
if (fd_msg_avp_setvalue(avp, &val) != 0) {
fd_msg_free(answer);
fd_log_error("can't set value for 'Auth-Application-Id' for 'Credit-Control-Request' message");
return 0;
}
fd_msg_avp_add(answer, MSG_BRW_LAST_CHILD, avp);
/* CC-Request-Type */
fd_msg_avp_new(crt_avp_do, 0, &avp);
memset(&val, 0, sizeof(val));
val.i32 = crt;
if (fd_msg_avp_setvalue(avp, &val) != 0) {
fd_msg_free(answer);
fd_log_error("can't set value for 'CC-Request-Type' for 'Credit-Control-Request' message");
return 0;
}
fd_msg_avp_add(answer, MSG_BRW_LAST_CHILD, avp);
/* CC-Request-Number */
fd_msg_avp_new(crn_avp_do, 0, &avp);
memset(&val, 0, sizeof(val));
val.i32 = crn;
if (fd_msg_avp_setvalue(avp, &val) != 0) {
fd_msg_free(answer);
fd_log_error("can't set value for 'CC-Request-Number' for 'Credit-Control-Request' message");
return 0;
}
fd_msg_avp_add(answer, MSG_BRW_LAST_CHILD, avp);
/* TODO make result configurable (depending on an AVP?) */
CHECK_FCT(fd_msg_rescode_set(answer, "DIAMETER_SUCCESS", NULL, NULL, 1));
fd_log_debug("--------------Received the following Credit Control Request:--------------");
CHECK_FCT(fd_sess_getsid(sess, &s, &sl));
fd_log_debug("Session: %.*s",(int)sl, s);
fd_log_debug("----------------------------------------------------------------------");
/* Send the answer */
CHECK_FCT(fd_msg_send(msg, NULL, NULL));
now = time(NULL);
if (!statistics.first) {
statistics.first = now;
}
if (statistics.last != now) {
print_statistics();
}
statistics.last = now;
statistics.sent++;
fd_log_debug("reply sent");
} else {
/* We received an answer message, just discard it */
CHECK_FCT(fd_msg_free(*msg));
*msg = NULL;
}
return 0;
}
/* entry hook: register callback */
static int cc_entry(char * conffile)
{
struct disp_when data;
TRACE_ENTRY("%p", conffile);
CHECK_FCT_DO(fd_dict_search(fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, "Auth-Application-Id", &aai_avp_do, ENOENT),
{ LOG_E("Unable to find 'Auth-Application-Id' AVP in the loaded dictionaries."); });
CHECK_FCT_DO(fd_dict_search(fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, "CC-Request-Number", &crn_avp_do, ENOENT),
{ LOG_E("Unable to find 'CC-Request-Number' AVP in the loaded dictionaries."); });
CHECK_FCT_DO(fd_dict_search(fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, "CC-Request-Type", &crt_avp_do, ENOENT),
{ LOG_E("Unable to find 'CC-Request-Type' AVP in the loaded dictionaries."); });
memset(&data, 0, sizeof(data));
/* Advertise the support for the Diameter Credit Control application in the peer */
CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_APPLICATION, APPLICATION_BY_NAME, "Diameter Credit Control Application", &data.app, ENOENT) );
CHECK_FCT( fd_disp_app_support ( data.app, NULL, 1, 0 ) );
/* register handler for CCR */
CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_COMMAND, CMD_BY_NAME, "Credit-Control-Request", &data.command, ENOENT) );
CHECK_FCT( fd_disp_register( ccr_handler, DISP_HOW_CC, &data, NULL, &ccr_handler_hdl ) );
return 0;
}
/* And terminate it */
void fd_ext_fini(void)
{
/* Unregister the callbacks */
if (ccr_handler_hdl) {
CHECK_FCT_DO( fd_disp_unregister(&ccr_handler_hdl, NULL), );
ccr_handler_hdl = NULL;
}
print_statistics();
return;
}
EXTENSION_ENTRY(MODULE_NAME, cc_entry);
|
