| /* |
| * rrlp.c |
| * |
| * RRLP implementation |
| * |
| * |
| * Copyright (C) 2009 Sylvain Munaut <tnt@246tNt.com> |
| * |
| * This program is free software: you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation, either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| |
| #include <errno.h> |
| #include <math.h> |
| |
| #include "gps.h" |
| #include "rrlp.h" |
| |
| #include <PDU.h> |
| #include <GPS-AssistData.h> |
| #include <NavigationModel.h> |
| #include <IonosphericModel.h> |
| #include <UTCModel.h> |
| #include <Almanac.h> |
| #include <RefLocation.h> |
| #include <ReferenceTime.h> |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* RRLP Assistance request decoding */ |
| /* ---------------------------------------------------------------------{{{ */ |
| /* Decode and validate the assistance data request messages. |
| * See section 10.10 of |
| * . ETSI TS 149 031 V8.1.0 (2009-01) |
| * . 3GPP TS 49.031 version 8.1.0 Release 8 |
| */ |
| |
| /* Packed structure from 49.031 spec (RGA = Request GPS Assistance) */ |
| |
| #define RRLP_RGA0_ALMANAC (1<<0) |
| #define RRLP_RGA0_UTC_MODEL (1<<1) |
| #define RRLP_RGA0_IONO_MODEL (1<<2) |
| #define RRLP_RGA0_NAV_MODEL (1<<3) |
| #define RRLP_RGA0_DGPS (1<<4) |
| #define RRLP_RGA0_REF_LOC (1<<5) |
| #define RRLP_RGA0_REF_TIME (1<<6) |
| #define RRLP_RGA0_ACQ_ASSIST (1<<7) |
| |
| #define RRLP_RGA1_REALTIME_INT (1<<0) |
| #define RRLP_RGA1_EPH_EXT (1<<1) |
| #define RRLP_RGA1_EPH_EXT_CHECK (1<<2) |
| |
| struct rrlp_rga_hdr { |
| uint8_t items0; |
| uint8_t items1; |
| } __attribute__((packed)); |
| |
| struct rrlp_rga_eph_sv { |
| uint8_t sv_id; /* [7:6] reserved, [5:0] sv_id */ |
| uint8_t iode; /* latest eph in the MS memory in hours */ |
| } __attribute__((packed)); |
| |
| struct rrlp_rga_eph { |
| uint8_t wn_hi; /* [7:6] = wn[9:8] */ |
| uint8_t wn_lo; /* wn[7:0] */ |
| uint8_t toe; /* latest eph in the MS memory in hours */ |
| uint8_t nsat_tmtoe; /* [7:4] nstat, [3:0] T-Toe limit */ |
| struct rrlp_rga_eph_sv svs[0]; |
| } __attribute__((packed)); |
| |
| struct rrlp_rga_eph_ext { |
| uint8_t validity; /* in 4 hours units */ |
| } __attribute__((packed)); |
| |
| struct rrlp_rga_eph_ext_check { |
| /* weeks are in gps week modulo 4 */ |
| uint8_t wn_begin_end; /* [7:4] begin, [3:0] end */ |
| uint8_t tow_begin; |
| uint8_t tow_end; |
| } __attribute__((packed)); |
| |
| |
| /* Parsing function */ |
| |
| int |
| rrlp_decode_assistance_request( |
| struct rrlp_assist_req *ar, |
| void *req, int req_len) |
| { |
| struct rrlp_rga_hdr *hdr = NULL; |
| struct rrlp_rga_eph *eph = NULL; |
| struct rrlp_rga_eph_ext *eph_ext = NULL; |
| struct rrlp_rga_eph_ext_check *eph_ext_check = NULL; |
| int p = 0; |
| |
| /* Reset */ |
| ar->req_elems = 0; |
| ar->eph_svs = 0; |
| |
| /* Parse message */ |
| hdr = req; |
| p += sizeof(struct rrlp_rga_hdr); |
| if (p > req_len) |
| return -1; |
| |
| if (hdr->items0 & RRLP_RGA0_NAV_MODEL) { |
| eph = req + p; |
| p += sizeof(struct rrlp_rga_eph); |
| if (p > req_len) |
| return -1; |
| p += (eph->nsat_tmtoe >> 4) * sizeof(struct rrlp_rga_eph_sv); |
| if (p > req_len) |
| return -1; |
| } |
| |
| if (hdr->items1 & RRLP_RGA1_EPH_EXT) { |
| eph_ext = req + p; |
| p += sizeof(struct rrlp_rga_eph_ext); |
| if (p > req_len) |
| return -1; |
| } |
| |
| if (hdr->items1 & RRLP_RGA1_EPH_EXT_CHECK) { |
| eph_ext_check = req + p; |
| p += sizeof(struct rrlp_rga_eph_ext_check); |
| if (p > req_len) |
| return -1; |
| } |
| |
| if (p != req_len) |
| return -2; /* not all bytes consumed ??? */ |
| |
| /* Print a warning for unsupported requests */ |
| if ((eph_ext != NULL) || |
| (eph_ext_check != NULL) || |
| (hdr->items0 & (RRLP_RGA0_DGPS | RRLP_RGA0_ACQ_ASSIST)) || |
| (hdr->items1 & RRLP_RGA1_REALTIME_INT)) { |
| fprintf(stderr, "[w] Unsupported assistance data requested, ignored ...\n"); |
| } |
| |
| /* Copy the request */ |
| if (hdr->items0 & RRLP_RGA0_ALMANAC) |
| ar->req_elems |= RRLP_AR_ALMANAC; |
| |
| if (hdr->items0 & RRLP_RGA0_UTC_MODEL) |
| ar->req_elems |= RRLP_AR_UTC_MODEL; |
| |
| if (hdr->items0 & RRLP_RGA0_IONO_MODEL) |
| ar->req_elems |= RRLP_AR_IONO_MODEL; |
| |
| if (hdr->items0 & RRLP_RGA0_REF_LOC) |
| ar->req_elems |= RRLP_AR_REF_LOC; |
| |
| if (hdr->items0 & RRLP_RGA0_REF_TIME) |
| ar->req_elems |= RRLP_AR_REF_TIME; |
| |
| if (hdr->items0 & RRLP_RGA0_NAV_MODEL) { |
| int i, n_svs = eph->nsat_tmtoe >> 4; |
| ar->req_elems |= RRLP_AR_EPHEMERIS; |
| for (i=0; i<n_svs; i++) |
| ar->eph_svs |= (1ULL << (eph->svs[i].sv_id - 1)); |
| } |
| |
| return 0; |
| } |
| |
| /* }}} */ |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* RRLP elements fill */ |
| /* ---------------------------------------------------------------------{{{ */ |
| |
| /* Helpers */ |
| |
| static void |
| _ts_23_032_store_latitude(double lat, uint8_t *b) |
| { |
| uint32_t x; |
| x = (uint32_t) floor(fabs(lat/90.0) * ((double)(1<<23))); |
| if (x >= (1<<23)) |
| x = (1<<23) - 1; |
| if (lat < 0.0) |
| x |= (1<<23); |
| b[0] = (x >> 16) & 0xff; |
| b[1] = (x >> 8) & 0xff; |
| b[2] = x & 0xff; |
| } |
| |
| static void |
| _ts_23_032_store_longitude(double lon, uint8_t *b) |
| { |
| int32_t x; |
| x = floor((lon/360.0) * ((double)(1<<24))); |
| if (x >= (1<<23)) |
| x = 0x007fffff; |
| else if (x < -(1<<23)) |
| x = 0x00800000; |
| b[0] = (x >> 16) & 0xff; |
| b[1] = (x >> 8) & 0xff; |
| b[2] = x & 0xff; |
| } |
| |
| static void |
| _ts_23_032_store_altitude(double alt, uint8_t *b) |
| { |
| int alt_i = (int)fabs(alt); |
| b[0] = ((alt_i >> 8) & 0x7f) | (alt<0.0 ? 0x80 : 0x00); |
| b[1] = alt_i & 0xff; |
| } |
| |
| |
| /* Fill methods */ |
| |
| static void |
| _rrlp_fill_navigation_model_element( |
| struct NavModelElement *rrlp_nme, |
| struct gps_ephemeris_sv *gps_eph_sv) |
| { |
| struct UncompressedEphemeris *rrlp_eph; |
| |
| rrlp_nme->satStatus.present = SatStatus_PR_newSatelliteAndModelUC; |
| rrlp_nme->satelliteID = gps_eph_sv->sv_id; |
| |
| rrlp_eph = &rrlp_nme->satStatus.choice.newSatelliteAndModelUC; |
| |
| rrlp_eph->ephemCodeOnL2 = gps_eph_sv->code_on_l2; |
| rrlp_eph->ephemURA = gps_eph_sv->sv_ura; |
| rrlp_eph->ephemSVhealth = gps_eph_sv->sv_health; |
| rrlp_eph->ephemIODC = gps_eph_sv->iodc; |
| rrlp_eph->ephemL2Pflag = gps_eph_sv->l2_p_flag; |
| rrlp_eph->ephemTgd = gps_eph_sv->t_gd; |
| rrlp_eph->ephemToc = gps_eph_sv->t_oc; |
| rrlp_eph->ephemAF2 = gps_eph_sv->a_f2; |
| rrlp_eph->ephemAF1 = gps_eph_sv->a_f1; |
| rrlp_eph->ephemAF0 = gps_eph_sv->a_f0; |
| rrlp_eph->ephemCrs = gps_eph_sv->c_rs; |
| rrlp_eph->ephemDeltaN = gps_eph_sv->delta_n; |
| rrlp_eph->ephemM0 = gps_eph_sv->m_0; |
| rrlp_eph->ephemCuc = gps_eph_sv->c_uc; |
| rrlp_eph->ephemE = gps_eph_sv->e; |
| rrlp_eph->ephemCus = gps_eph_sv->c_us; |
| rrlp_eph->ephemAPowerHalf = gps_eph_sv->a_powhalf; |
| rrlp_eph->ephemToe = gps_eph_sv->t_oe; |
| rrlp_eph->ephemFitFlag = gps_eph_sv->fit_flag; |
| rrlp_eph->ephemAODA = gps_eph_sv->aodo; |
| rrlp_eph->ephemCic = gps_eph_sv->c_ic; |
| rrlp_eph->ephemOmegaA0 = gps_eph_sv->omega_0; |
| rrlp_eph->ephemCis = gps_eph_sv->c_is; |
| rrlp_eph->ephemI0 = gps_eph_sv->i_0; |
| rrlp_eph->ephemCrc = gps_eph_sv->c_rc; |
| rrlp_eph->ephemW = gps_eph_sv->w; |
| rrlp_eph->ephemOmegaADot = gps_eph_sv->omega_dot; |
| rrlp_eph->ephemIDot = gps_eph_sv->idot; |
| |
| rrlp_eph->ephemSF1Rsvd.reserved1 = gps_eph_sv->_rsvd1; |
| rrlp_eph->ephemSF1Rsvd.reserved2 = gps_eph_sv->_rsvd2; |
| rrlp_eph->ephemSF1Rsvd.reserved3 = gps_eph_sv->_rsvd3; |
| rrlp_eph->ephemSF1Rsvd.reserved4 = gps_eph_sv->_rsvd4; |
| } |
| |
| static void |
| _rrlp_fill_almanac_element( |
| struct AlmanacElement *rrlp_ae, |
| struct gps_almanac_sv *gps_alm_sv) |
| { |
| rrlp_ae->satelliteID = gps_alm_sv->sv_id; |
| |
| rrlp_ae->almanacE = gps_alm_sv->e; |
| rrlp_ae->alamanacToa = gps_alm_sv->t_oa; |
| rrlp_ae->almanacKsii = gps_alm_sv->ksii; |
| rrlp_ae->almanacOmegaDot = gps_alm_sv->omega_dot; |
| rrlp_ae->almanacSVhealth = gps_alm_sv->sv_health; |
| rrlp_ae->almanacAPowerHalf = gps_alm_sv->a_powhalf; |
| rrlp_ae->almanacOmega0 = gps_alm_sv->omega_0; |
| rrlp_ae->almanacW = gps_alm_sv->w; |
| rrlp_ae->almanacM0 = gps_alm_sv->m_0; |
| rrlp_ae->almanacAF0 = gps_alm_sv->a_f0; |
| rrlp_ae->almanacAF1 = gps_alm_sv->a_f1; |
| |
| } |
| |
| static void |
| _rrlp_fill_ionospheric_model( |
| struct IonosphericModel *rrlp_iono, |
| struct gps_ionosphere_model *gps_iono) |
| { |
| rrlp_iono->alfa0 = gps_iono->alpha_0; |
| rrlp_iono->alfa1 = gps_iono->alpha_1; |
| rrlp_iono->alfa2 = gps_iono->alpha_2; |
| rrlp_iono->alfa3 = gps_iono->alpha_3; |
| rrlp_iono->beta0 = gps_iono->beta_0; |
| rrlp_iono->beta1 = gps_iono->beta_1; |
| rrlp_iono->beta2 = gps_iono->beta_2; |
| rrlp_iono->beta3 = gps_iono->beta_3; |
| } |
| |
| static void |
| _rrlp_fill_utc_model( |
| struct UTCModel *rrlp_utc, |
| struct gps_utc_model *gps_utc) |
| { |
| rrlp_utc->utcA1 = gps_utc->a1; |
| rrlp_utc->utcA0 = gps_utc->a0; |
| rrlp_utc->utcTot = gps_utc->t_ot; |
| rrlp_utc->utcWNt = gps_utc->wn_t & 0xff; |
| rrlp_utc->utcDeltaTls = gps_utc->delta_t_ls; |
| rrlp_utc->utcWNlsf = gps_utc->wn_lsf & 0xff; |
| rrlp_utc->utcDN = gps_utc->dn; |
| rrlp_utc->utcDeltaTlsf = gps_utc->delta_t_lsf; |
| } |
| |
| /* }}} */ |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* RRLP Assistance PDU Generation */ |
| /* ---------------------------------------------------------------------{{{ */ |
| |
| struct PDU * |
| _rrlp_create_gps_assist_pdu(int refnum, struct GPS_AssistData **o_gps_ad) |
| { |
| struct PDU *pdu; |
| struct GPS_AssistData *gps_ad; |
| |
| pdu = calloc(1, sizeof(*pdu)); |
| if (!pdu) |
| return NULL; |
| |
| gps_ad = calloc(1, sizeof(*gps_ad)); |
| if (!gps_ad) { |
| free(pdu); |
| return NULL; |
| } |
| |
| if (o_gps_ad) |
| *o_gps_ad = gps_ad; |
| |
| pdu->referenceNumber = refnum; |
| pdu->component.present = RRLP_Component_PR_assistanceData; |
| pdu->component.choice.assistanceData.gps_AssistData = gps_ad; |
| |
| return pdu; |
| } |
| |
| static int |
| _rrlp_add_ionospheric_model( |
| struct GPS_AssistData *rrlp_gps_ad, |
| struct gps_assist_data *gps_ad) |
| { |
| struct IonosphericModel *rrlp_iono; |
| |
| if (!(gps_ad->fields & GPS_FIELD_IONOSPHERE)) |
| return -EINVAL; |
| |
| rrlp_iono = calloc(1, sizeof(*rrlp_iono)); |
| if (!rrlp_iono) |
| return -ENOMEM; |
| rrlp_gps_ad->controlHeader.ionosphericModel = rrlp_iono; |
| |
| _rrlp_fill_ionospheric_model(rrlp_iono, &gps_ad->ionosphere); |
| |
| return 0; |
| } |
| |
| static int |
| _rrlp_add_utc_model( |
| struct GPS_AssistData *rrlp_gps_ad, |
| struct gps_assist_data *gps_ad) |
| { |
| struct UTCModel *rrlp_utc; |
| |
| if (!(gps_ad->fields & GPS_FIELD_UTC)) |
| return -EINVAL; |
| |
| rrlp_utc = calloc(1, sizeof(*rrlp_utc)); |
| if (!rrlp_utc) |
| return -ENOMEM; |
| rrlp_gps_ad->controlHeader.utcModel = rrlp_utc; |
| |
| _rrlp_fill_utc_model(rrlp_utc, &gps_ad->utc); |
| |
| return 0; |
| } |
| |
| static int |
| _rrlp_add_reference_location( |
| struct GPS_AssistData *rrlp_gps_ad, |
| struct gps_assist_data *gps_ad) |
| { |
| struct RefLocation *rrlp_refloc; |
| uint8_t *b; |
| |
| if (!(gps_ad->fields & GPS_FIELD_REFPOS)) |
| return -EINVAL; |
| |
| rrlp_refloc = calloc(1, sizeof(*rrlp_refloc)); |
| if (!rrlp_refloc) |
| return -ENOMEM; |
| rrlp_gps_ad->controlHeader.refLocation = rrlp_refloc; |
| |
| b = malloc(9); |
| |
| b[0] = 0x80; /* Ellipsoid Point with altitude */ |
| _ts_23_032_store_latitude(gps_ad->ref_pos.latitude, &b[1]); |
| _ts_23_032_store_longitude(gps_ad->ref_pos.longitude, &b[4]); |
| _ts_23_032_store_altitude(gps_ad->ref_pos.altitude, &b[7]); |
| |
| rrlp_refloc->threeDLocation.buf = b; |
| rrlp_refloc->threeDLocation.size = 9; |
| |
| return 0; |
| } |
| |
| static int |
| _rrlp_add_reference_time( |
| struct GPS_AssistData *rrlp_gps_ad, |
| struct gps_assist_data *gps_ad) |
| { |
| struct ReferenceTime *rrlp_reftime; |
| |
| if (!(gps_ad->fields & GPS_FIELD_REFTIME)) |
| return -EINVAL; |
| |
| rrlp_reftime = calloc(1, sizeof(*rrlp_reftime)); |
| if (!rrlp_reftime) |
| return -ENOMEM; |
| rrlp_gps_ad->controlHeader.referenceTime = rrlp_reftime; |
| |
| rrlp_reftime->gpsTime.gpsWeek = gps_ad->ref_time.wn & 0x3ff; /* 10b */ |
| rrlp_reftime->gpsTime.gpsTOW23b = |
| ((int)floor(gps_ad->ref_time.tow / 0.08)) & 0x7fffff; /* 23b */ |
| |
| return 0; |
| } |
| |
| static int |
| _rrlp_add_almanac( |
| struct GPS_AssistData *rrlp_gps_ad, |
| struct gps_assist_data *gps_ad, int *start, int count) |
| { |
| int i; |
| struct Almanac *rrlp_alm; |
| struct gps_almanac *gps_alm = &gps_ad->almanac; |
| |
| if (!(gps_ad->fields & GPS_FIELD_ALMANAC)) |
| return -EINVAL; |
| |
| rrlp_alm = calloc(1, sizeof(*rrlp_alm)); |
| if (!rrlp_alm) |
| return -ENOMEM; |
| rrlp_gps_ad->controlHeader.almanac = rrlp_alm; |
| |
| rrlp_alm->alamanacWNa = gps_alm->wna; |
| if (count == -1) |
| count = gps_alm->n_sv - *start; |
| for (i=*start; (i<*start+count) && (i<gps_alm->n_sv); i++) { |
| struct AlmanacElement *ae; |
| ae = calloc(1, sizeof(*ae)); |
| if (!ae) |
| return -ENOMEM; |
| _rrlp_fill_almanac_element(ae, &gps_alm->svs[i]); |
| ASN_SEQUENCE_ADD(&rrlp_alm->almanacList.list, ae); |
| } |
| |
| *start = i; |
| |
| return i < gps_alm->n_sv; |
| } |
| |
| static int |
| _rrlp_add_ephemeris( |
| struct GPS_AssistData *rrlp_gps_ad, |
| struct gps_assist_data *gps_ad, int *start, int count, uint64_t mask) |
| { |
| int i, j; |
| struct NavigationModel *rrlp_nav; |
| struct gps_ephemeris *gps_eph = &gps_ad->ephemeris; |
| |
| if (!(gps_ad->fields & GPS_FIELD_EPHEMERIS)) |
| return -EINVAL; |
| |
| rrlp_nav = calloc(1, sizeof(*rrlp_nav)); |
| if (!rrlp_nav) |
| return -ENOMEM; |
| rrlp_gps_ad->controlHeader.navigationModel = rrlp_nav; |
| |
| if (count == -1) |
| count = gps_eph->n_sv - *start; |
| for (i=*start,j=0; (j<count) && (i<gps_eph->n_sv); i++) { |
| if (!(mask & (1ULL<<(gps_eph->svs[i].sv_id-1)))) |
| continue; |
| struct NavModelElement *nme; |
| nme = calloc(1, sizeof(*nme)); |
| if (!nme) |
| return -ENOMEM; |
| _rrlp_fill_navigation_model_element(nme, &gps_eph->svs[i]); |
| ASN_SEQUENCE_ADD(&rrlp_nav->navModelList.list, nme); |
| j++; |
| } |
| |
| *start = i; |
| |
| return i < gps_eph->n_sv; |
| } |
| |
| |
| #define MAX_PDUS 64 |
| |
| int |
| rrlp_gps_assist_pdus( |
| struct gps_assist_data *gps_ad, struct rrlp_assist_req *req, |
| void **o_pdu, int *o_len, int o_max_pdus) |
| { |
| struct PDU *lst_pdu[MAX_PDUS]; |
| int lst_cnt = 0; |
| |
| struct PDU *rrlp_pdu = NULL; |
| struct GPS_AssistData *rrlp_gps_ad = NULL; |
| uint32_t re = req->req_elems; |
| int i, rv = 0; |
| |
| /* IonosphericModel, UTCModel, RefLocation, ReferenceTime */ |
| if (re & (RRLP_AR_IONO_MODEL | |
| RRLP_AR_UTC_MODEL | |
| RRLP_AR_REF_TIME | |
| RRLP_AR_REF_LOC)) |
| { |
| int pdu_has_data = 0; |
| |
| rrlp_pdu = _rrlp_create_gps_assist_pdu(1, &rrlp_gps_ad); |
| if (!rrlp_pdu) { |
| rv = -ENOMEM; |
| goto error; |
| } |
| |
| if (re & RRLP_AR_IONO_MODEL) |
| if (!_rrlp_add_ionospheric_model(rrlp_gps_ad, gps_ad)) |
| pdu_has_data = 1; |
| |
| if (re & RRLP_AR_UTC_MODEL) |
| if (!_rrlp_add_utc_model(rrlp_gps_ad, gps_ad)) |
| pdu_has_data = 1; |
| |
| if (re & RRLP_AR_REF_TIME) |
| if (!_rrlp_add_reference_time(rrlp_gps_ad, gps_ad)) |
| pdu_has_data = 1; |
| |
| if (re & RRLP_AR_REF_LOC) |
| if (!_rrlp_add_reference_location(rrlp_gps_ad, gps_ad)) |
| pdu_has_data = 1; |
| |
| if (pdu_has_data) { |
| lst_pdu[lst_cnt++] = rrlp_pdu; |
| rrlp_pdu = NULL; |
| } |
| } |
| |
| /* Almanac */ |
| if (re & RRLP_AR_ALMANAC) { |
| i = 0; |
| do { |
| if (!(gps_ad->fields & GPS_FIELD_ALMANAC)) |
| break; |
| |
| if (!rrlp_pdu) { |
| rrlp_pdu = _rrlp_create_gps_assist_pdu(1, &rrlp_gps_ad); |
| if (!rrlp_pdu) { |
| rv = -ENOMEM; |
| goto error; |
| } |
| } |
| |
| rv = _rrlp_add_almanac(rrlp_gps_ad, gps_ad, &i, 10); |
| if (rv < 0) |
| goto error; |
| |
| lst_pdu[lst_cnt++] = rrlp_pdu; |
| rrlp_pdu = NULL; |
| } while (rv); |
| } |
| |
| /* Ephemeris */ |
| if (re & RRLP_AR_EPHEMERIS) { |
| i = 0; |
| do { |
| if (!(gps_ad->fields & GPS_FIELD_EPHEMERIS)) |
| break; |
| |
| if (!rrlp_pdu) { |
| rrlp_pdu = _rrlp_create_gps_assist_pdu(1, &rrlp_gps_ad); |
| if (!rrlp_pdu) { |
| rv = -ENOMEM; |
| goto error; |
| } |
| } |
| |
| rv = _rrlp_add_ephemeris(rrlp_gps_ad, gps_ad, &i, 2, req->eph_svs); |
| |
| lst_pdu[lst_cnt++] = rrlp_pdu; |
| rrlp_pdu = NULL; |
| |
| } while (rv); |
| } |
| |
| /* Serialize & Release all PDUs */ |
| for (i=0; i<lst_cnt && i<o_max_pdus; i++) { |
| /* Pseudo segmentation flags */ |
| MoreAssDataToBeSent_t *mad = calloc(1, sizeof(*mad)); |
| *mad = (i == (lst_cnt-1)) ? |
| MoreAssDataToBeSent_noMoreMessages : |
| MoreAssDataToBeSent_moreMessagesOnTheWay; |
| lst_pdu[i]->component.choice.assistanceData.moreAssDataToBeSent = mad; |
| |
| /* Serialization */ |
| // asn_fprint(stdout, &asn_DEF_PDU, lst_pdu[i]); |
| rv = uper_encode_to_new_buffer(&asn_DEF_PDU, NULL, lst_pdu[i], &o_pdu[i]); |
| if (rv < 0) |
| goto error; |
| o_len[i] = rv; |
| } |
| |
| rv = lst_cnt; |
| |
| /* Release ASN.1 objects */ |
| error: |
| if (rrlp_pdu) |
| asn_DEF_PDU.free_struct(&asn_DEF_PDU, (void*)rrlp_pdu, 0); |
| |
| for (i=0; i<lst_cnt; i++) |
| asn_DEF_PDU.free_struct(&asn_DEF_PDU, lst_pdu[i], 0); |
| |
| return rv; |
| } |
| |
| /* }}} */ |
| |