blob: e60c3ab01e90c4ccefe36d7583123a1807b737b2 [file] [log] [blame]
Sylvain Munaut341542b2009-12-22 21:53:22 +01001/*
2 * rrlp.c
3 *
4 * RRLP implementation
5 *
6 *
7 * Copyright (C) 2009 Sylvain Munaut <tnt@246tNt.com>
8 *
9 * This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation, either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22
23
24#include <errno.h>
Sylvain Munaut8dbd19e2009-12-28 14:31:41 +010025#include <math.h>
Sylvain Munaut341542b2009-12-22 21:53:22 +010026
27#include "gps.h"
28#include "rrlp.h"
29
30#include <PDU.h>
31#include <GPS-AssistData.h>
32#include <NavigationModel.h>
33#include <IonosphericModel.h>
34#include <UTCModel.h>
35#include <Almanac.h>
36#include <RefLocation.h>
37#include <ReferenceTime.h>
38
39
40/* ------------------------------------------------------------------------ */
41/* RRLP Assistance request decoding */
42/* ---------------------------------------------------------------------{{{ */
43/* Decode and validate the assistance data request messages.
44 * See section 10.10 of
45 * . ETSI TS 149 031 V8.1.0 (2009-01)
46 * . 3GPP TS 49.031 version 8.1.0 Release 8
47 */
48
49/* Packed structure from 49.031 spec (RGA = Request GPS Assistance) */
50
51#define RRLP_RGA0_ALMANAC (1<<0)
52#define RRLP_RGA0_UTC_MODEL (1<<1)
53#define RRLP_RGA0_IONO_MODEL (1<<2)
54#define RRLP_RGA0_NAV_MODEL (1<<3)
55#define RRLP_RGA0_DGPS (1<<4)
56#define RRLP_RGA0_REF_LOC (1<<5)
57#define RRLP_RGA0_REF_TIME (1<<6)
58#define RRLP_RGA0_ACQ_ASSIST (1<<7)
59
60#define RRLP_RGA1_REALTIME_INT (1<<0)
61#define RRLP_RGA1_EPH_EXT (1<<1)
62#define RRLP_RGA1_EPH_EXT_CHECK (1<<2)
63
64struct rrlp_rga_hdr {
65 uint8_t items0;
66 uint8_t items1;
67} __attribute__((packed));
68
69struct rrlp_rga_eph_sv {
70 uint8_t sv_id; /* [7:6] reserved, [5:0] sv_id */
71 uint8_t iode; /* latest eph in the MS memory in hours */
72} __attribute__((packed));
73
74struct rrlp_rga_eph {
75 uint8_t wn_hi; /* [7:6] = wn[9:8] */
76 uint8_t wn_lo; /* wn[7:0] */
77 uint8_t toe; /* latest eph in the MS memory in hours */
78 uint8_t nsat_tmtoe; /* [7:4] nstat, [3:0] T-Toe limit */
79 struct rrlp_rga_eph_sv svs[0];
80} __attribute__((packed));
81
82struct rrlp_rga_eph_ext {
83 uint8_t validity; /* in 4 hours units */
84} __attribute__((packed));
85
86struct rrlp_rga_eph_ext_check {
87 /* weeks are in gps week modulo 4 */
88 uint8_t wn_begin_end; /* [7:4] begin, [3:0] end */
89 uint8_t tow_begin;
90 uint8_t tow_end;
91} __attribute__((packed));
92
93
94/* Parsing function */
95
96int
97rrlp_decode_assistance_request(
98 struct rrlp_assist_req *ar,
99 void *req, int req_len)
100{
101 struct rrlp_rga_hdr *hdr = NULL;
102 struct rrlp_rga_eph *eph = NULL;
103 struct rrlp_rga_eph_ext *eph_ext = NULL;
104 struct rrlp_rga_eph_ext_check *eph_ext_check = NULL;
105 int p = 0;
106
107 /* Reset */
108 ar->req_elems = 0;
109 ar->eph_svs = 0;
110
111 /* Parse message */
112 hdr = req;
113 p += sizeof(struct rrlp_rga_hdr);
114 if (p > req_len)
115 return -1;
116
117 if (hdr->items0 & RRLP_RGA0_NAV_MODEL) {
118 eph = req + p;
119 p += sizeof(struct rrlp_rga_eph);
120 if (p > req_len)
121 return -1;
122 p += (eph->nsat_tmtoe >> 4) * sizeof(struct rrlp_rga_eph_sv);
123 if (p > req_len)
124 return -1;
125 }
126
127 if (hdr->items1 & RRLP_RGA1_EPH_EXT) {
128 eph_ext = req + p;
129 p += sizeof(struct rrlp_rga_eph_ext);
130 if (p > req_len)
131 return -1;
132 }
133
134 if (hdr->items1 & RRLP_RGA1_EPH_EXT_CHECK) {
135 eph_ext_check = req + p;
136 p += sizeof(struct rrlp_rga_eph_ext_check);
137 if (p > req_len)
138 return -1;
139 }
140
141 if (p != req_len)
142 return -2; /* not all bytes consumed ??? */
143
144 /* Print a warning for unsupported requests */
145 if ((eph_ext != NULL) ||
146 (eph_ext_check != NULL) ||
147 (hdr->items0 & (RRLP_RGA0_DGPS | RRLP_RGA0_ACQ_ASSIST)) ||
148 (hdr->items1 & RRLP_RGA1_REALTIME_INT)) {
149 fprintf(stderr, "[w] Unsupported assistance data requested, ignored ...\n");
150 }
151
152 /* Copy the request */
153 if (hdr->items0 & RRLP_RGA0_ALMANAC)
154 ar->req_elems |= RRLP_AR_ALMANAC;
155
156 if (hdr->items0 & RRLP_RGA0_UTC_MODEL)
157 ar->req_elems |= RRLP_AR_UTC_MODEL;
158
159 if (hdr->items0 & RRLP_RGA0_IONO_MODEL)
160 ar->req_elems |= RRLP_AR_IONO_MODEL;
161
162 if (hdr->items0 & RRLP_RGA0_REF_LOC)
163 ar->req_elems |= RRLP_AR_REF_LOC;
164
165 if (hdr->items0 & RRLP_RGA0_REF_TIME)
166 ar->req_elems |= RRLP_AR_REF_TIME;
167
168 if (hdr->items0 & RRLP_RGA0_NAV_MODEL) {
169 int i, n_svs = eph->nsat_tmtoe >> 4;
170 ar->req_elems |= RRLP_AR_EPHEMERIS;
171 for (i=0; i<n_svs; i++)
172 ar->eph_svs |= (1ULL << (eph->svs[i].sv_id - 1));
173 }
174
175 return 0;
176}
177
178/* }}} */
179
180
181/* ------------------------------------------------------------------------ */
182/* RRLP elements fill */
183/* ---------------------------------------------------------------------{{{ */
184
Sylvain Munaut8dbd19e2009-12-28 14:31:41 +0100185 /* Helpers */
186
187static void
188_ts_23_032_store_latitude(double lat, uint8_t *b)
189{
190 uint32_t x;
191 x = (uint32_t) floor(fabs(lat/90.0) * ((double)(1<<23)));
192 if (x >= (1<<23))
193 x = (1<<23) - 1;
194 if (lat < 0.0)
195 x |= (1<<23);
196 b[0] = (x >> 16) & 0xff;
197 b[1] = (x >> 8) & 0xff;
198 b[2] = x & 0xff;
199}
200
201static void
202_ts_23_032_store_longitude(double lon, uint8_t *b)
203{
204 int32_t x;
205 x = floor((lon/360.0) * ((double)(1<<24)));
206 if (x >= (1<<23))
207 x = 0x007fffff;
208 else if (x < -(1<<23))
209 x = 0x00800000;
210 b[0] = (x >> 16) & 0xff;
211 b[1] = (x >> 8) & 0xff;
212 b[2] = x & 0xff;
213}
214
215static void
216_ts_23_032_store_altitude(double alt, uint8_t *b)
217{
218 int alt_i = (int)fabs(alt);
219 b[0] = ((alt_i >> 8) & 0x7f) | (alt<0.0 ? 0x80 : 0x00);
220 b[1] = alt_i & 0xff;
221}
222
223
224 /* Fill methods */
225
Sylvain Munaut341542b2009-12-22 21:53:22 +0100226static void
227_rrlp_fill_navigation_model_element(
228 struct NavModelElement *rrlp_nme,
229 struct gps_ephemeris_sv *gps_eph_sv)
230{
231 struct UncompressedEphemeris *rrlp_eph;
232
233 rrlp_nme->satStatus.present = SatStatus_PR_newSatelliteAndModelUC;
234 rrlp_nme->satelliteID = gps_eph_sv->sv_id;
235
236 rrlp_eph = &rrlp_nme->satStatus.choice.newSatelliteAndModelUC;
237
238 rrlp_eph->ephemCodeOnL2 = gps_eph_sv->code_on_l2;
239 rrlp_eph->ephemURA = gps_eph_sv->sv_ura;
240 rrlp_eph->ephemSVhealth = gps_eph_sv->sv_health;
241 rrlp_eph->ephemIODC = gps_eph_sv->iodc;
242 rrlp_eph->ephemL2Pflag = gps_eph_sv->l2_p_flag;
243 rrlp_eph->ephemTgd = gps_eph_sv->t_gd;
244 rrlp_eph->ephemToc = gps_eph_sv->t_oc;
245 rrlp_eph->ephemAF2 = gps_eph_sv->a_f2;
246 rrlp_eph->ephemAF1 = gps_eph_sv->a_f1;
247 rrlp_eph->ephemAF0 = gps_eph_sv->a_f0;
248 rrlp_eph->ephemCrs = gps_eph_sv->c_rs;
249 rrlp_eph->ephemDeltaN = gps_eph_sv->delta_n;
250 rrlp_eph->ephemM0 = gps_eph_sv->m_0;
251 rrlp_eph->ephemCuc = gps_eph_sv->c_uc;
252 rrlp_eph->ephemE = gps_eph_sv->e;
253 rrlp_eph->ephemCus = gps_eph_sv->c_us;
254 rrlp_eph->ephemAPowerHalf = gps_eph_sv->a_powhalf;
255 rrlp_eph->ephemToe = gps_eph_sv->t_oe;
256 rrlp_eph->ephemFitFlag = gps_eph_sv->fit_flag;
257 rrlp_eph->ephemAODA = gps_eph_sv->aodo;
258 rrlp_eph->ephemCic = gps_eph_sv->c_ic;
259 rrlp_eph->ephemOmegaA0 = gps_eph_sv->omega_0;
260 rrlp_eph->ephemCis = gps_eph_sv->c_is;
261 rrlp_eph->ephemI0 = gps_eph_sv->i_0;
262 rrlp_eph->ephemCrc = gps_eph_sv->c_rc;
263 rrlp_eph->ephemW = gps_eph_sv->w;
264 rrlp_eph->ephemOmegaADot = gps_eph_sv->omega_dot;
265 rrlp_eph->ephemIDot = gps_eph_sv->idot;
266
267 rrlp_eph->ephemSF1Rsvd.reserved1 = gps_eph_sv->_rsvd1;
268 rrlp_eph->ephemSF1Rsvd.reserved2 = gps_eph_sv->_rsvd2;
269 rrlp_eph->ephemSF1Rsvd.reserved3 = gps_eph_sv->_rsvd3;
270 rrlp_eph->ephemSF1Rsvd.reserved4 = gps_eph_sv->_rsvd4;
271}
272
273static void
274_rrlp_fill_almanac_element(
275 struct AlmanacElement *rrlp_ae,
276 struct gps_almanac_sv *gps_alm_sv)
277{
278 rrlp_ae->satelliteID = gps_alm_sv->sv_id;
279
280 rrlp_ae->almanacE = gps_alm_sv->e;
281 rrlp_ae->alamanacToa = gps_alm_sv->t_oa;
282 rrlp_ae->almanacKsii = gps_alm_sv->ksii;
283 rrlp_ae->almanacOmegaDot = gps_alm_sv->omega_dot;
284 rrlp_ae->almanacSVhealth = gps_alm_sv->sv_health;
285 rrlp_ae->almanacAPowerHalf = gps_alm_sv->a_powhalf;
286 rrlp_ae->almanacOmega0 = gps_alm_sv->omega_0;
287 rrlp_ae->almanacW = gps_alm_sv->w;
288 rrlp_ae->almanacM0 = gps_alm_sv->m_0;
289 rrlp_ae->almanacAF0 = gps_alm_sv->a_f0;
290 rrlp_ae->almanacAF1 = gps_alm_sv->a_f1;
291
292}
293
294static void
295_rrlp_fill_ionospheric_model(
296 struct IonosphericModel *rrlp_iono,
297 struct gps_ionosphere_model *gps_iono)
298{
299 rrlp_iono->alfa0 = gps_iono->alpha_0;
300 rrlp_iono->alfa1 = gps_iono->alpha_1;
301 rrlp_iono->alfa2 = gps_iono->alpha_2;
302 rrlp_iono->alfa3 = gps_iono->alpha_3;
303 rrlp_iono->beta0 = gps_iono->beta_0;
304 rrlp_iono->beta1 = gps_iono->beta_1;
305 rrlp_iono->beta2 = gps_iono->beta_2;
306 rrlp_iono->beta3 = gps_iono->beta_3;
307}
308
309static void
310_rrlp_fill_utc_model(
311 struct UTCModel *rrlp_utc,
312 struct gps_utc_model *gps_utc)
313{
314 rrlp_utc->utcA1 = gps_utc->a1;
315 rrlp_utc->utcA0 = gps_utc->a0;
316 rrlp_utc->utcTot = gps_utc->t_ot;
317 rrlp_utc->utcWNt = gps_utc->wn_t & 0xff;
318 rrlp_utc->utcDeltaTls = gps_utc->delta_t_ls;
319 rrlp_utc->utcWNlsf = gps_utc->wn_lsf & 0xff;
320 rrlp_utc->utcDN = gps_utc->dn;
321 rrlp_utc->utcDeltaTlsf = gps_utc->delta_t_lsf;
322}
323
324/* }}} */
325
326
327/* ------------------------------------------------------------------------ */
328/* RRLP Assistance PDU Generation */
329/* ---------------------------------------------------------------------{{{ */
330
331struct PDU *
332_rrlp_create_gps_assist_pdu(int refnum, struct GPS_AssistData **o_gps_ad)
333{
334 struct PDU *pdu;
335 struct GPS_AssistData *gps_ad;
336
337 pdu = calloc(1, sizeof(*pdu));
338 if (!pdu)
339 return NULL;
340
341 gps_ad = calloc(1, sizeof(*gps_ad));
342 if (!gps_ad) {
343 free(pdu);
344 return NULL;
345 }
346
347 if (o_gps_ad)
348 *o_gps_ad = gps_ad;
349
350 pdu->referenceNumber = refnum;
351 pdu->component.present = RRLP_Component_PR_assistanceData;
352 pdu->component.choice.assistanceData.gps_AssistData = gps_ad;
353
354 return pdu;
355}
356
357static int
358_rrlp_add_ionospheric_model(
359 struct GPS_AssistData *rrlp_gps_ad,
360 struct gps_assist_data *gps_ad)
361{
362 struct IonosphericModel *rrlp_iono;
363
364 if (!(gps_ad->fields & GPS_FIELD_IONOSPHERE))
365 return -EINVAL;
366
367 rrlp_iono = calloc(1, sizeof(*rrlp_iono));
368 if (!rrlp_iono)
369 return -ENOMEM;
370 rrlp_gps_ad->controlHeader.ionosphericModel = rrlp_iono;
371
372 _rrlp_fill_ionospheric_model(rrlp_iono, &gps_ad->ionosphere);
373
374 return 0;
375}
376
377static int
378_rrlp_add_utc_model(
379 struct GPS_AssistData *rrlp_gps_ad,
380 struct gps_assist_data *gps_ad)
381{
382 struct UTCModel *rrlp_utc;
383
384 if (!(gps_ad->fields & GPS_FIELD_UTC))
385 return -EINVAL;
386
387 rrlp_utc = calloc(1, sizeof(*rrlp_utc));
388 if (!rrlp_utc)
389 return -ENOMEM;
390 rrlp_gps_ad->controlHeader.utcModel = rrlp_utc;
391
392 _rrlp_fill_utc_model(rrlp_utc, &gps_ad->utc);
393
394 return 0;
395}
396
397static int
398_rrlp_add_reference_location(
399 struct GPS_AssistData *rrlp_gps_ad,
400 struct gps_assist_data *gps_ad)
401{
402 struct RefLocation *rrlp_refloc;
Sylvain Munaut8dbd19e2009-12-28 14:31:41 +0100403 uint8_t *b;
Sylvain Munaut341542b2009-12-22 21:53:22 +0100404
Sylvain Munaut8dbd19e2009-12-28 14:31:41 +0100405 if (!(gps_ad->fields & GPS_FIELD_REFPOS))
406 return -EINVAL;
Sylvain Munaut341542b2009-12-22 21:53:22 +0100407
408 rrlp_refloc = calloc(1, sizeof(*rrlp_refloc));
409 if (!rrlp_refloc)
410 return -ENOMEM;
411 rrlp_gps_ad->controlHeader.refLocation = rrlp_refloc;
412
Sylvain Munaut8dbd19e2009-12-28 14:31:41 +0100413 b = malloc(9);
414
415 b[0] = 0x80; /* Ellipsoid Point with altitude */
416 _ts_23_032_store_latitude(gps_ad->ref_pos.latitude, &b[1]);
417 _ts_23_032_store_longitude(gps_ad->ref_pos.longitude, &b[4]);
418 _ts_23_032_store_altitude(gps_ad->ref_pos.altitude, &b[7]);
419
420 rrlp_refloc->threeDLocation.buf = b;
421 rrlp_refloc->threeDLocation.size = 9;
Sylvain Munaut341542b2009-12-22 21:53:22 +0100422
423 return 0;
424}
425
426static int
427_rrlp_add_reference_time(
428 struct GPS_AssistData *rrlp_gps_ad,
429 struct gps_assist_data *gps_ad)
430{
431 struct ReferenceTime *rrlp_reftime;
432
Sylvain Munaut14039dd2009-12-28 15:47:21 +0100433 if (!(gps_ad->fields & GPS_FIELD_REFTIME))
434 return -EINVAL;
Sylvain Munaut341542b2009-12-22 21:53:22 +0100435
436 rrlp_reftime = calloc(1, sizeof(*rrlp_reftime));
437 if (!rrlp_reftime)
438 return -ENOMEM;
439 rrlp_gps_ad->controlHeader.referenceTime = rrlp_reftime;
440
Sylvain Munaut14039dd2009-12-28 15:47:21 +0100441 rrlp_reftime->gpsTime.gpsWeek = gps_ad->ref_time.wn & 0x3ff; /* 10b */
442 rrlp_reftime->gpsTime.gpsTOW23b =
443 ((int)floor(gps_ad->ref_time.tow / 0.08)) & 0x7fffff; /* 23b */
Sylvain Munaut341542b2009-12-22 21:53:22 +0100444
445 return 0;
446}
447
448static int
449_rrlp_add_almanac(
450 struct GPS_AssistData *rrlp_gps_ad,
451 struct gps_assist_data *gps_ad, int *start, int count)
452{
453 int i;
454 struct Almanac *rrlp_alm;
455 struct gps_almanac *gps_alm = &gps_ad->almanac;
456
457 if (!(gps_ad->fields & GPS_FIELD_ALMANAC))
458 return -EINVAL;
459
460 rrlp_alm = calloc(1, sizeof(*rrlp_alm));
461 if (!rrlp_alm)
462 return -ENOMEM;
463 rrlp_gps_ad->controlHeader.almanac = rrlp_alm;
464
465 rrlp_alm->alamanacWNa = gps_alm->wna;
466 if (count == -1)
467 count = gps_alm->n_sv - *start;
468 for (i=*start; (i<*start+count) && (i<gps_alm->n_sv); i++) {
469 struct AlmanacElement *ae;
470 ae = calloc(1, sizeof(*ae));
471 if (!ae)
472 return -ENOMEM;
473 _rrlp_fill_almanac_element(ae, &gps_alm->svs[i]);
474 ASN_SEQUENCE_ADD(&rrlp_alm->almanacList.list, ae);
475 }
476
477 *start = i;
478
479 return i < gps_alm->n_sv;
480}
481
482static int
483_rrlp_add_ephemeris(
484 struct GPS_AssistData *rrlp_gps_ad,
485 struct gps_assist_data *gps_ad, int *start, int count, uint64_t mask)
486{
487 int i, j;
488 struct NavigationModel *rrlp_nav;
489 struct gps_ephemeris *gps_eph = &gps_ad->ephemeris;
490
491 if (!(gps_ad->fields & GPS_FIELD_EPHEMERIS))
492 return -EINVAL;
493
494 rrlp_nav = calloc(1, sizeof(*rrlp_nav));
495 if (!rrlp_nav)
496 return -ENOMEM;
497 rrlp_gps_ad->controlHeader.navigationModel = rrlp_nav;
498
499 if (count == -1)
500 count = gps_eph->n_sv - *start;
501 for (i=*start,j=0; (j<count) && (i<gps_eph->n_sv); i++) {
502 if (!(mask & (1ULL<<(gps_eph->svs[i].sv_id-1))))
503 continue;
504 struct NavModelElement *nme;
505 nme = calloc(1, sizeof(*nme));
506 if (!nme)
507 return -ENOMEM;
508 _rrlp_fill_navigation_model_element(nme, &gps_eph->svs[i]);
509 ASN_SEQUENCE_ADD(&rrlp_nav->navModelList.list, nme);
510 j++;
511 }
512
513 *start = i;
514
515 return i < gps_eph->n_sv;
516}
517
518
519#define MAX_PDUS 64
520
521int
522rrlp_gps_assist_pdus(
523 struct gps_assist_data *gps_ad, struct rrlp_assist_req *req,
524 void **o_pdu, int *o_len, int o_max_pdus)
525{
526 struct PDU *lst_pdu[MAX_PDUS];
527 int lst_cnt = 0;
528
529 struct PDU *rrlp_pdu = NULL;
530 struct GPS_AssistData *rrlp_gps_ad = NULL;
531 uint32_t re = req->req_elems;
532 int i, rv = 0;
533
534 /* IonosphericModel, UTCModel, RefLocation, ReferenceTime */
535 if (re & (RRLP_AR_IONO_MODEL |
536 RRLP_AR_UTC_MODEL |
537 RRLP_AR_REF_TIME |
538 RRLP_AR_REF_LOC))
539 {
540 int pdu_has_data = 0;
541
542 rrlp_pdu = _rrlp_create_gps_assist_pdu(1, &rrlp_gps_ad);
543 if (!rrlp_pdu) {
544 rv = -ENOMEM;
545 goto error;
546 }
547
548 if (re & RRLP_AR_IONO_MODEL)
549 if (!_rrlp_add_ionospheric_model(rrlp_gps_ad, gps_ad))
550 pdu_has_data = 1;
551
552 if (re & RRLP_AR_UTC_MODEL)
553 if (!_rrlp_add_utc_model(rrlp_gps_ad, gps_ad))
554 pdu_has_data = 1;
555
556 if (re & RRLP_AR_REF_TIME)
557 if (!_rrlp_add_reference_time(rrlp_gps_ad, gps_ad))
558 pdu_has_data = 1;
559
560 if (re & RRLP_AR_REF_LOC)
561 if (!_rrlp_add_reference_location(rrlp_gps_ad, gps_ad))
562 pdu_has_data = 1;
563
564 if (pdu_has_data) {
565 lst_pdu[lst_cnt++] = rrlp_pdu;
566 rrlp_pdu = NULL;
567 }
568 }
569
570 /* Almanac */
571 if (re & RRLP_AR_ALMANAC) {
572 i = 0;
573 do {
574 if (!(gps_ad->fields & GPS_FIELD_ALMANAC))
575 break;
576
577 if (!rrlp_pdu) {
578 rrlp_pdu = _rrlp_create_gps_assist_pdu(1, &rrlp_gps_ad);
579 if (!rrlp_pdu) {
580 rv = -ENOMEM;
581 goto error;
582 }
583 }
584
585 rv = _rrlp_add_almanac(rrlp_gps_ad, gps_ad, &i, 10);
586 if (rv < 0)
587 goto error;
588
589 lst_pdu[lst_cnt++] = rrlp_pdu;
590 rrlp_pdu = NULL;
591 } while (rv);
592 }
593
594 /* Ephemeris */
595 if (re & RRLP_AR_EPHEMERIS) {
596 i = 0;
597 do {
598 if (!(gps_ad->fields & GPS_FIELD_EPHEMERIS))
599 break;
600
601 if (!rrlp_pdu) {
602 rrlp_pdu = _rrlp_create_gps_assist_pdu(1, &rrlp_gps_ad);
603 if (!rrlp_pdu) {
604 rv = -ENOMEM;
605 goto error;
606 }
607 }
608
609 rv = _rrlp_add_ephemeris(rrlp_gps_ad, gps_ad, &i, 2, req->eph_svs);
610
611 lst_pdu[lst_cnt++] = rrlp_pdu;
612 rrlp_pdu = NULL;
613
614 } while (rv);
615 }
616
617 /* Serialize & Release all PDUs */
618 for (i=0; i<lst_cnt && i<o_max_pdus; i++) {
Sylvain Munautd3164442009-12-28 00:04:56 +0100619 /* Pseudo segmentation flags */
620 MoreAssDataToBeSent_t *mad = calloc(1, sizeof(*mad));
621 *mad = (i == (lst_cnt-1)) ?
622 MoreAssDataToBeSent_noMoreMessages :
623 MoreAssDataToBeSent_moreMessagesOnTheWay;
624 lst_pdu[i]->component.choice.assistanceData.moreAssDataToBeSent = mad;
625
626 /* Serialization */
Sylvain Munaut341542b2009-12-22 21:53:22 +0100627 // asn_fprint(stdout, &asn_DEF_PDU, lst_pdu[i]);
628 rv = uper_encode_to_new_buffer(&asn_DEF_PDU, NULL, lst_pdu[i], &o_pdu[i]);
629 if (rv < 0)
630 goto error;
631 o_len[i] = rv;
632 }
633
Sylvain Munaut90e46f52009-12-28 00:00:45 +0100634 rv = lst_cnt;
Sylvain Munaut341542b2009-12-22 21:53:22 +0100635
636 /* Release ASN.1 objects */
637error:
638 if (rrlp_pdu)
639 asn_DEF_PDU.free_struct(&asn_DEF_PDU, (void*)rrlp_pdu, 0);
640
641 for (i=0; i<lst_cnt; i++)
642 asn_DEF_PDU.free_struct(&asn_DEF_PDU, lst_pdu[i], 0);
643
644 return rv;
645}
646
647/* }}} */
648