Ashin Walpola
d107534eb2
obu-firmware builds against the vanetza-idf C-ITS library, which until now came from the colleague's microbu-esp32c5 tree beside the repository and was not tracked here, so a clone of this repository could not build the firmware it ships. The library alone is now part of obu-firmware, as obu-firmware/external/vanetza-idf: their external/vanetza-idf at commit cf4b99f, unchanged (9775 files; see its PROVENANCE.md). CMake takes it from there by default; -DVANETZA_IDF_DIR still points the build elsewhere. The rest of the colleague's tree (their own VAM firmware, PKI tooling, station-link Python tools, the V2X2MAP bridge) stays out of this repository and gitignored; nothing is pushed to their repository. NOTES.md, docs/06, TODO.md and the pcap verifier's usage line point at the new location.
121 lines
3.2 KiB
C
121 lines
3.2 KiB
C
/*
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* Copyright (c) 2017 Lev Walkin <vlm@lionet.info>.
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* All rights reserved.
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* Redistribution and modifications are permitted subject to BSD license.
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*/
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#include "asn_internal.h"
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#include "NativeReal.h"
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#include "REAL.h"
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/*
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* Decode REAL type.
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*/
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asn_dec_rval_t
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NativeReal_decode_ber(const asn_codec_ctx_t *opt_codec_ctx,
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const asn_TYPE_descriptor_t *td, void **sptr,
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const void *buf_ptr, size_t size, int tag_mode) {
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asn_dec_rval_t rval;
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ber_tlv_len_t length;
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ASN_DEBUG("Decoding %s as REAL (tm=%d)", td->name, tag_mode);
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/*
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* Check tags.
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*/
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rval = ber_check_tags(opt_codec_ctx, td, 0, buf_ptr, size, tag_mode, 0,
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&length, 0);
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if(rval.code != RC_OK) return rval;
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assert(length >= 0); /* Ensured by ber_check_tags */
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ASN_DEBUG("%s length is %d bytes", td->name, (int)length);
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/*
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* Make sure we have this length.
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*/
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buf_ptr = ((const char *)buf_ptr) + rval.consumed;
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size -= rval.consumed;
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if(length > (ber_tlv_len_t)size) {
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rval.code = RC_WMORE;
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rval.consumed = 0;
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return rval;
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}
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/*
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* ASN.1 encoded REAL: buf_ptr, length
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* Fill the Dbl, at the same time checking for overflow.
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* If overflow occurred, return with RC_FAIL.
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*/
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{
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uint8_t scratch[24]; /* Longer than %.16f in decimal */
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REAL_t tmp;
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double d;
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int ret;
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if((size_t)length < sizeof(scratch)) {
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tmp.buf = scratch;
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tmp.size = length;
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} else {
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/* This rarely happens: impractically long value */
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tmp.buf = CALLOC(1, length + 1);
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tmp.size = length;
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if(!tmp.buf) {
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rval.code = RC_FAIL;
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rval.consumed = 0;
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return rval;
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}
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}
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memcpy(tmp.buf, buf_ptr, length);
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tmp.buf[length] = '\0';
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ret = asn_REAL2double(&tmp, &d);
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if(tmp.buf != scratch) FREEMEM(tmp.buf);
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if(ret) {
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rval.code = RC_FAIL;
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rval.consumed = 0;
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return rval;
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}
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if(NativeReal__set(td, sptr, d) < 0)
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ASN__DECODE_FAILED;
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}
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rval.code = RC_OK;
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rval.consumed += length;
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ASN_DEBUG("Took %ld/%ld bytes to encode %s", (long)rval.consumed,
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(long)length, td->name);
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return rval;
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}
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/*
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* Encode the NativeReal using the standard REAL type DER encoder.
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*/
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asn_enc_rval_t
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NativeReal_encode_der(const asn_TYPE_descriptor_t *td, const void *sptr,
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int tag_mode, ber_tlv_tag_t tag,
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asn_app_consume_bytes_f *cb, void *app_key) {
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double d = NativeReal__get_double(td, sptr);
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asn_enc_rval_t erval = {0,0,0};
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REAL_t tmp;
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/* Prepare a temporary clean structure */
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memset(&tmp, 0, sizeof(tmp));
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if(asn_double2REAL(&tmp, d))
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ASN__ENCODE_FAILED;
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/* Encode a fake REAL */
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erval = der_encode_primitive(td, &tmp, tag_mode, tag, cb, app_key);
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if(erval.encoded == -1) {
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assert(erval.structure_ptr == &tmp);
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erval.structure_ptr = sptr;
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}
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/* Free possibly allocated members of the temporary structure */
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ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_REAL, &tmp);
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return erval;
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}
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