messages.c

Last change on this file was 1554:566bb46cc73f, checked in by Sebastien Decugis <sdecugis@freediameter.net>, 5 months ago
Updated copyright information
File size: 17.9 KB

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1	/*********************************************************************************************************
2	* Software License Agreement (BSD License) *
3	* Author: Sebastien Decugis <sdecugis@freediameter.net> *
4	* *
5	* Copyright (c) 2020, WIDE Project and NICT *
6	* All rights reserved. *
7	* *
8	* Redistribution and use of this software in source and binary forms, with or without modification, are *
9	* permitted provided that the following conditions are met: *
10	* *
11	* * Redistributions of source code must retain the above *
12	* copyright notice, this list of conditions and the *
13	* following disclaimer. *
14	* *
15	* * Redistributions in binary form must reproduce the above *
16	* copyright notice, this list of conditions and the *
17	* following disclaimer in the documentation and/or other *
18	* materials provided with the distribution. *
19	* *
20	* * Neither the name of the WIDE Project or NICT nor the *
21	* names of its contributors may be used to endorse or *
22	* promote products derived from this software without *
23	* specific prior written permission of WIDE Project and *
24	* NICT. *
25	* *
26	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED *
27	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
28	* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR *
29	* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT *
30	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS *
31	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR *
32	* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF *
33	* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
34	*********************************************************************************************************/
35
36	#include "fdcore-internal.h"
37
38	static struct dict_object * dict_avp_SI = NULL; /* Session-Id */
39	static struct dict_object * dict_avp_OH = NULL; /* Origin-Host */
40	static struct dict_object * dict_avp_OR = NULL; /* Origin-Realm */
41	static struct dict_object * dict_avp_EM = NULL; /* Error-Message */
42	static struct dict_object * dict_avp_ERH = NULL; /* Error-Reporting-Host */
43	static struct dict_object * dict_avp_FAVP= NULL; /* Failed-AVP */
44	static struct dict_object * dict_avp_RC = NULL; /* Result-Code */
45	static struct dict_object * dict_avp_ER = NULL; /* Experimental-Result */
46	static struct dict_object * dict_avp_VI = NULL; /* Vendor-Id */
47	static struct dict_object * dict_avp_ERC = NULL; /* Experimental-Result-Code */
48	struct dict_object * fd_dict_avp_OSI = NULL; /* Origin-State-Id */
49	struct dict_object * fd_dict_cmd_CER = NULL; /* Capabilities-Exchange-Request */
50	struct dict_object * fd_dict_cmd_DWR = NULL; /* Device-Watchdog-Request */
51	struct dict_object * fd_dict_avp_DC = NULL; /* Disconnect-Cause */
52	struct dict_object * fd_dict_cmd_DPR = NULL; /* Disconnect-Peer-Request */
53
54	/* Resolve the dictionary objects */
55	int fd_msg_init(void)
56	{
57	TRACE_ENTRY("");
58
59	/* Initialize the dictionary objects that we may use frequently */
60	CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, "Session-Id", &dict_avp_SI , ENOENT) );
61	CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, "Origin-Host", &dict_avp_OH , ENOENT) );
62	CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, "Origin-Realm", &dict_avp_OR , ENOENT) );
63	CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, "Origin-State-Id", &fd_dict_avp_OSI , ENOENT) );
64
65	CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, "Result-Code", &dict_avp_RC , ENOENT) );
66	CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, "Error-Message", &dict_avp_EM , ENOENT) );
67	CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, "Error-Reporting-Host", &dict_avp_ERH , ENOENT) );
68	CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, "Failed-AVP", &dict_avp_FAVP, ENOENT) );
69	CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, "Experimental-Result", &dict_avp_ER, ENOENT) );
70	CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, "Vendor-Id", &dict_avp_VI, ENOENT) );
71	CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, "Experimental-Result-Code", &dict_avp_ERC, ENOENT) );
72
73	CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, "Disconnect-Cause", &fd_dict_avp_DC , ENOENT) );
74
75	CHECK_FCT( fd_dict_search ( fd_g_config->cnf_dict, DICT_COMMAND, CMD_BY_NAME, "Capabilities-Exchange-Request", &fd_dict_cmd_CER, ENOENT ) );
76	CHECK_FCT( fd_dict_search ( fd_g_config->cnf_dict, DICT_COMMAND, CMD_BY_NAME, "Device-Watchdog-Request", &fd_dict_cmd_DWR, ENOENT ) );
77	CHECK_FCT( fd_dict_search ( fd_g_config->cnf_dict, DICT_COMMAND, CMD_BY_NAME, "Disconnect-Peer-Request", &fd_dict_cmd_DPR, ENOENT ) );
78
79
80	return 0;
81	}
82
83	/* Add Origin-Host, Origin-Realm, Origin-State-Id AVPS at the end of the message */
84	int fd_msg_add_origin ( struct msg * msg, int osi )
85	{
86	union avp_value val;
87	struct avp * avp_OH = NULL;
88	struct avp * avp_OR = NULL;
89	struct avp * avp_OSI = NULL;
90
91	TRACE_ENTRY("%p", msg);
92	CHECK_PARAMS( msg );
93
94	/* Create the Origin-Host AVP */
95	CHECK_FCT( fd_msg_avp_new( dict_avp_OH, 0, &avp_OH ) );
96
97	/* Set its value */
98	memset(&val, 0, sizeof(val));
99	val.os.data = (os0_t)fd_g_config->cnf_diamid;
100	val.os.len = fd_g_config->cnf_diamid_len;
101	CHECK_FCT( fd_msg_avp_setvalue( avp_OH, &val ) );
102
103	/* Add it to the message */
104	CHECK_FCT( fd_msg_avp_add( msg, MSG_BRW_LAST_CHILD, avp_OH ) );
105
106
107	/* Create the Origin-Realm AVP */
108	CHECK_FCT( fd_msg_avp_new( dict_avp_OR, 0, &avp_OR ) );
109
110	/* Set its value */
111	memset(&val, 0, sizeof(val));
112	val.os.data = (os0_t)fd_g_config->cnf_diamrlm;
113	val.os.len = fd_g_config->cnf_diamrlm_len;
114	CHECK_FCT( fd_msg_avp_setvalue( avp_OR, &val ) );
115
116	/* Add it to the message */
117	CHECK_FCT( fd_msg_avp_add( msg, MSG_BRW_LAST_CHILD, avp_OR ) );
118
119	if (osi) {
120	/* Create the Origin-State-Id AVP */
121	CHECK_FCT( fd_msg_avp_new( fd_dict_avp_OSI, 0, &avp_OSI ) );
122
123	/* Set its value */
124	memset(&val, 0, sizeof(val));
125	val.u32 = fd_g_config->cnf_orstateid;
126	CHECK_FCT( fd_msg_avp_setvalue( avp_OSI, &val ) );
127
128	/* Add it to the message */
129	CHECK_FCT( fd_msg_avp_add( msg, MSG_BRW_LAST_CHILD, avp_OSI ) );
130	}
131
132	return 0;
133	}
134
135	/* Create a new Session-Id and add at the beginning of the message. */
136	int fd_msg_new_session( struct msg * msg, os0_t opt, size_t optlen )
137	{
138	union avp_value val;
139	struct avp * avp = NULL;
140	struct session * sess = NULL;
141	os0_t sid;
142	size_t sidlen;
143
144	TRACE_ENTRY("%p %p %zd", msg, opt, optlen);
145	CHECK_PARAMS( msg );
146
147	/* Check there is not already a session in the message */
148	CHECK_FCT( fd_msg_sess_get(fd_g_config->cnf_dict, msg, &sess, NULL) );
149	CHECK_PARAMS( sess == NULL );
150
151	/* Ok, now create the session */
152	CHECK_FCT( fd_sess_new ( &sess, fd_g_config->cnf_diamid, fd_g_config->cnf_diamid_len, opt, optlen ) );
153	CHECK_FCT( fd_sess_getsid( sess, &sid, &sidlen) );
154
155	/* Create an AVP to hold it */
156	CHECK_FCT( fd_msg_avp_new( dict_avp_SI, 0, &avp ) );
157
158	/* Set its value */
159	memset(&val, 0, sizeof(val));
160	val.os.data = sid;
161	val.os.len = sidlen;
162	CHECK_FCT( fd_msg_avp_setvalue( avp, &val ) );
163
164	/* Add it to the message */
165	CHECK_FCT( fd_msg_avp_add( msg, MSG_BRW_FIRST_CHILD, avp ) );
166
167	/* Save the session associated with the message */
168	CHECK_FCT( fd_msg_sess_set( msg, sess) );
169
170	/* Done! */
171	return 0;
172	}
173
174
175	/* Add Result-Code or Experimental-Result, and eventually Failed-AVP, Error-Message and Error-Reporting-Host AVPs */
176	int fd_msg_add_result( struct msg * msg, vendor_id_t vendor, struct dict_object * restype, char * rescode, char * errormsg, struct avp * optavp, int type_id )
177	{
178	union avp_value val;
179	uint32_t rc_val = 0;
180	int set_e_bit=0;
181	int std_err_msg=0;
182
183	TRACE_ENTRY("%p %d %p %s %p %p %d", msg, vendor, restype, rescode, errormsg, optavp, type_id);
184
185	CHECK_PARAMS( msg && restype && rescode );
186
187	/* Find the enum value corresponding to the rescode string, this will give the class of error */
188	{
189	struct dict_object * enum_obj = NULL;
190
191	/* Search in the restype */
192	struct dict_enumval_request req;
193	memset(&req, 0, sizeof(struct dict_enumval_request));
194	req.type_obj = restype;
195
196	/* Now search for the value given as parameter */
197	req.search.enum_name = rescode;
198	CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_ENUMVAL, ENUMVAL_BY_STRUCT, &req, &enum_obj, ENOTSUP) );
199
200	/* finally retrieve its data */
201	CHECK_FCT_DO( fd_dict_getval( enum_obj, &(req.search) ), return EINVAL );
202
203	/* copy the found value, we're done */
204	rc_val = req.search.enum_value.u32;
205	}
206
207	if (type_id == 1) {
208	/* Add the Origin-Host and Origin-Realm AVP */
209	CHECK_FCT( fd_msg_add_origin ( msg, 0 ) );
210	}
211
212	if (vendor == 0) {
213	/* Vendor 0; create the Result-Code AVP */
214	struct avp * avp_RC = NULL;
215	CHECK_FCT( fd_msg_avp_new( dict_avp_RC, 0, &avp_RC ) );
216
217	/* Set its value */
218	memset(&val, 0, sizeof(val));
219	val.u32 = rc_val;
220	CHECK_FCT( fd_msg_avp_setvalue( avp_RC, &val ) );
221
222	/* Add it to the message */
223	CHECK_FCT( fd_msg_avp_add( msg, MSG_BRW_LAST_CHILD, avp_RC ) );
224	} else {
225	/* Vendor !0; create the Experimental-Result AVP */
226	struct avp * avp_ER = NULL;
227	CHECK_FCT( fd_msg_avp_new( dict_avp_ER, 0, &avp_ER ) );
228
229	/* Create the Vendor-Id AVP and add to Experimental-Result */
230	{
231	struct avp * avp_VI = NULL;
232	CHECK_FCT( fd_msg_avp_new( dict_avp_VI, 0, &avp_VI ) );
233
234	/* Set Vendor-Id value to vendor */
235	memset(&val, 0, sizeof(val));
236	val.u32 = vendor;
237	CHECK_FCT( fd_msg_avp_setvalue( avp_VI, &val ) );
238
239	/* Add it to Experimental-Result */
240	CHECK_FCT( fd_msg_avp_add( avp_ER, MSG_BRW_LAST_CHILD, avp_VI ) );
241	}
242
243	/* Create the Experimental-Result-Code AVP and add to Experimental-Result */
244	{
245	struct avp * avp_ERC = NULL;
246	CHECK_FCT( fd_msg_avp_new( dict_avp_ERC, 0, &avp_ERC ) );
247
248	/* Set Experimental-Result-Code value to rc_val */
249	memset(&val, 0, sizeof(val));
250	val.u32 = rc_val;
251	CHECK_FCT( fd_msg_avp_setvalue( avp_ERC, &val ) );
252
253	/* Add it to Experimental-Result */
254	CHECK_FCT( fd_msg_avp_add( avp_ER, MSG_BRW_LAST_CHILD, avp_ERC ) );
255	}
256
257	/* Add it to the message */
258	CHECK_FCT( fd_msg_avp_add( msg, MSG_BRW_LAST_CHILD, avp_ER ) );
259	}
260
261	if (type_id == 2) {
262	/* Add the Error-Reporting-Host AVP */
263	struct avp * avp_ERH = NULL;
264	CHECK_FCT( fd_msg_avp_new( dict_avp_ERH, 0, &avp_ERH ) );
265
266	/* Set its value */
267	memset(&val, 0, sizeof(val));
268	val.os.data = (uint8_t *)fd_g_config->cnf_diamid;
269	val.os.len = fd_g_config->cnf_diamid_len;
270	CHECK_FCT( fd_msg_avp_setvalue( avp_ERH, &val ) );
271
272	/* Add it to the message */
273	CHECK_FCT( fd_msg_avp_add( msg, MSG_BRW_LAST_CHILD, avp_ERH ) );
274	}
275
276	/* Now add the optavp in a Failed-AVP if provided */
277	if (optavp) {
278	struct avp * avp_FAVP= NULL;
279	struct avp * optavp_cpy = NULL;
280	struct avp_hdr opt_hdr, optcpy_hdr;
281	struct dict_object * opt_model = NULL;
282	int is_grouped = 0;
283
284	/* Create the Failed-AVP AVP */
285	CHECK_FCT( fd_msg_avp_new( dict_avp_FAVP, 0, &avp_FAVP ) );
286
287	/* Was this AVP a grouped one? Best effort only here */
288	if (!fd_msg_model ( optavp, &opt_model ) && (opt_model != NULL)) {
289	struct dict_avp_data dictdata;
290	CHECK_FCT( fd_dict_getval(opt_model, &dictdata) );
291	if (dictdata.avp_basetype == AVP_TYPE_GROUPED)
292	is_grouped = 1;
293	}
294
295	/* Create a new AVP with a copy of the data of the invalid or missing AVP */
296	optavp_cpy = optavp;
297
298	if (is_grouped) {
299	CHECK_FCT( fd_msg_avp_new( opt_model, 0, &optavp_cpy) );
300	} else {
301	CHECK_FCT( fd_msg_avp_new( NULL, AVPFL_SET_BLANK_VALUE \| AVPFL_SET_RAWDATA_FROM_AVP, &optavp_cpy) );
302
303	CHECK_FCT( fd_msg_avp_hdr(optavp, &opt_hdr) );
304	CHECK_FCT( fd_msg_avp_hdr(optavp_cpy, &optcpy_hdr) );
305	memcpy(optcpy_hdr, opt_hdr, sizeof(struct avp_hdr));
306	}
307
308	/* Add the passed AVP inside it */
309	CHECK_FCT( fd_msg_avp_add( avp_FAVP, MSG_BRW_LAST_CHILD, optavp_cpy ) );
310
311	/* And add to the message */
312	CHECK_FCT( fd_msg_avp_add( msg, MSG_BRW_LAST_CHILD, avp_FAVP ) );
313	}
314
315
316	/* Deal with the 'E' bit and the error message */
317	switch (rc_val / 1000) {
318	case 1: /* Informational */
319	case 2: /* Success */
320	/* Nothing special here: no E bit, no error message unless one is specified */
321	break;
322
323	case 3: /* Protocol Errors */
324	set_e_bit = 1;
325	std_err_msg = 1;
326	break;
327
328	case 4: /* Transcient Failure */
329	case 5: /* Permanent Failure */
330	if (rc_val == 5017) /* DIAMETER_NO_COMMON_SECURITY */ {
331	set_e_bit = 1;
332	}
333	default:
334	std_err_msg = 1;
335	break;
336
337	}
338
339	{
340	struct msg_hdr * hdr = NULL;
341
342	CHECK_FCT( fd_msg_hdr( msg, &hdr ) );
343
344	if (set_e_bit)
345	hdr->msg_flags \|= CMD_FLAG_ERROR;
346	else
347	hdr->msg_flags &= ~ CMD_FLAG_ERROR;
348	}
349
350	if (std_err_msg \|\| errormsg) {
351	/* Add the Error-Message AVP */
352	struct avp * avp_EM = NULL;
353	CHECK_FCT( fd_msg_avp_new( dict_avp_EM, 0, &avp_EM ) );
354
355	/* Set its value */
356	memset(&val, 0, sizeof(val));
357
358	if (errormsg) {
359	val.os.data = (uint8_t *)errormsg;
360	val.os.len = strlen(errormsg);
361	} else {
362	val.os.data = (uint8_t *)rescode;
363	val.os.len = strlen(rescode);
364	}
365	CHECK_FCT( fd_msg_avp_setvalue( avp_EM, &val ) );
366
367	/* Add it to the message */
368	CHECK_FCT( fd_msg_avp_add( msg, MSG_BRW_LAST_CHILD, avp_EM ) );
369	}
370
371	return 0;
372	}
373
374	int fd_msg_rescode_set( struct msg * msg, char * rescode, char * errormsg, struct avp * optavp, int type_id )
375	{
376	struct dict_object * restype = NULL;
377	CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_TYPE, TYPE_OF_AVP, dict_avp_RC, &restype, ENOENT ) );
378	return fd_msg_add_result(msg, 0, restype, rescode, errormsg, optavp, type_id);
379	}
380
381	static int fd_msg_send_int( struct msg ** pmsg, void (anscb)(void , struct msg *), void data, void (expirecb)(void , DiamId_t, size_t, struct msg *), const struct timespec timeout )
382	{
383	struct msg_hdr *hdr;
384	DiamId_t diamid;
385
386	/* Save the callback in the message, with the timeout */
387	CHECK_FCT( fd_msg_anscb_associate( *pmsg, anscb, data, expirecb, timeout ) );
388
389	/* If this is a new request, call the HOOK_MESSAGE_LOCAL hook */
390	if ( (fd_msg_hdr(*pmsg, &hdr) == 0)
391	&& (hdr->msg_flags & CMD_FLAG_REQUEST)
392	&& (fd_msg_source_get(*pmsg, &diamid, NULL) == 0)
393	&& (diamid == NULL)) {
394	fd_hook_call(HOOK_MESSAGE_LOCAL, pmsg, NULL, NULL, fd_msg_pmdl_get(pmsg));
395	}
396
397	/* Post the message in the outgoing queue */
398	CHECK_FCT( fd_fifo_post(fd_g_outgoing, pmsg) );
399
400	return 0;
401	}
402
403	/* Send a message and optionally register a callback for an answer */
404	int fd_msg_send ( struct msg ** pmsg, void (anscb)(void , struct msg *), void data )
405	{
406	TRACE_ENTRY("%p %p %p", pmsg, anscb, data);
407	CHECK_PARAMS( pmsg );
408
409	return fd_msg_send_int(pmsg, anscb, data, NULL, NULL);
410	}
411
412	/* The variation of the same function with a timeout callback */
413	int fd_msg_send_timeout ( struct msg ** pmsg, void (anscb)(void , struct msg *), void data, void (expirecb)(void , DiamId_t, size_t, struct msg *), const struct timespec timeout )
414	{
415	TRACE_ENTRY("%p %p %p %p %p", pmsg, anscb, data, expirecb, timeout);
416	CHECK_PARAMS( pmsg && expirecb && timeout );
417
418	return fd_msg_send_int(pmsg, anscb, data, expirecb, timeout);
419	}
420
421
422	/* Parse a message against our dictionary, and in case of error log and eventually build the error reply -- returns the parsing status */
423	int fd_msg_parse_or_error( struct msg msg, struct msg error)
424	{
425	int ret = 0;
426	struct msg * m;
427	struct msg_hdr * hdr = NULL;
428	struct fd_pei pei;
429
430	TRACE_ENTRY("%p", msg);
431
432	CHECK_PARAMS(msg && *msg && error);
433	m = *msg;
434	*error = NULL;
435
436	/* Parse the message against our dictionary */
437	ret = fd_msg_parse_rules ( m, fd_g_config->cnf_dict, &pei);
438	if ((ret != EBADMSG) /* Parsing grouped AVP failed / Conflicting rule found */
439	&& (ret != ENOTSUP)) /* Command is not supported / Mandatory AVP is not supported */
440	return ret; /* 0 or another error */
441
442	/* Log */
443	fd_hook_call(HOOK_MESSAGE_PARSING_ERROR, m, NULL, pei.pei_message ?: pei.pei_errcode, fd_msg_pmdl_get(m));
444
445	CHECK_FCT( fd_msg_hdr(m, &hdr) );
446
447	/* Now create an answer error if the message is a query */
448	if (hdr->msg_flags & CMD_FLAG_REQUEST) {
449
450	/* Create the error message */
451	CHECK_FCT( fd_msg_new_answer_from_req ( fd_g_config->cnf_dict, &m, pei.pei_protoerr ? MSGFL_ANSW_ERROR : 0 ) );
452
453	/* Set the error code */
454	CHECK_FCT( fd_msg_rescode_set(m, pei.pei_errcode, pei.pei_message, pei.pei_avp, 1 ) );
455
456	/* free the pei AVP to avoid memory leak */
457	if (pei.pei_avp_free) {
458	fd_msg_free(pei.pei_avp);
459	}
460
461	*msg = NULL;
462	*error = m;
463
464	} else {
465	do { /* Rescue error messages */
466	struct avp * avp;
467	union avp_value * rc = NULL;
468
469	/* Search the Result-Code AVP */
470	CHECK_FCT_DO( fd_msg_browse(*msg, MSG_BRW_FIRST_CHILD, &avp, NULL), break );
471	while (avp) {
472	struct avp_hdr * ahdr;
473	CHECK_FCT_DO( fd_msg_avp_hdr( avp, &ahdr ), break );
474
475	if ((ahdr->avp_code == AC_RESULT_CODE) && (! (ahdr->avp_flags & AVP_FLAG_VENDOR)) ) {
476	/* Parse this AVP */
477	if (fd_msg_parse_dict(avp, fd_g_config->cnf_dict, &pei) < 0) {
478	TRACE_DEBUG(INFO, "error parsing Result-Code AVP");
479	rc = NULL;
480	break;
481	}
482	rc = ahdr->avp_value;
483	if (rc == NULL) {
484	TRACE_DEBUG(INFO, "invalid Result-Code AVP");
485	break;
486	}
487	break;
488	}
489
490	/* Go to next AVP */
491	CHECK_FCT_DO( fd_msg_browse(avp, MSG_BRW_NEXT, &avp, NULL), break );
492	}
493
494	if (rc) {
495	switch (rc->u32 / 1000) {
496	case 1: /* 1xxx : Informational */
497	case 2: /* 2xxx : Sucess */
498	/* In these cases, we want the message to validate the ABNF, so we will discard the bad message */
499	break;
500
501	default: /* Other errors */
502	/* We let the application decide what to do with the message, we rescue it */
503	*error = m;
504	}
505	}
506	} while (0);
507	}
508
509	return EBADMSG; /* We convert ENOTSUP to EBADMSG as well */
510	}

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source: freeDiameter/libfdcore/messages.c

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