mirror of https://gerrit.osmocom.org/asn1c
333 lines
8.6 KiB
C
333 lines
8.6 KiB
C
/*-
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* Copyright (c) 2003-2017 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 <RELATIVE-OID.h>
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#include <OCTET_STRING.h>
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#include <asn_codecs_prim.h> /* Encoder and decoder of a primitive type */
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#include <limits.h> /* for CHAR_BIT */
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#include <errno.h>
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/*
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* RELATIVE-OID basic type description.
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*/
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static const ber_tlv_tag_t asn_DEF_RELATIVE_OID_tags[] = {
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(ASN_TAG_CLASS_UNIVERSAL | (13 << 2))
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};
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asn_TYPE_operation_t asn_OP_RELATIVE_OID = {
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ASN__PRIMITIVE_TYPE_free,
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RELATIVE_OID_print,
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OCTET_STRING_compare, /* Implemented in terms of opaque comparison */
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ber_decode_primitive,
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der_encode_primitive,
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RELATIVE_OID_decode_xer,
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RELATIVE_OID_encode_xer,
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#ifdef ASN_DISABLE_OER_SUPPORT
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0,
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0,
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#else
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RELATIVE_OID_decode_oer,
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RELATIVE_OID_encode_oer,
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#endif /* ASN_DISABLE_OER_SUPPORT */
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#ifdef ASN_DISABLE_PER_SUPPORT
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0,
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0,
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#else
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OCTET_STRING_decode_uper,
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OCTET_STRING_encode_uper,
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#endif /* ASN_DISABLE_PER_SUPPORT */
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RELATIVE_OID_random_fill,
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0 /* Use generic outmost tag fetcher */
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};
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asn_TYPE_descriptor_t asn_DEF_RELATIVE_OID = {
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"RELATIVE-OID",
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"RELATIVE_OID",
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&asn_OP_RELATIVE_OID,
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asn_DEF_RELATIVE_OID_tags,
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sizeof(asn_DEF_RELATIVE_OID_tags)
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/ sizeof(asn_DEF_RELATIVE_OID_tags[0]),
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asn_DEF_RELATIVE_OID_tags, /* Same as above */
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sizeof(asn_DEF_RELATIVE_OID_tags)
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/ sizeof(asn_DEF_RELATIVE_OID_tags[0]),
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{ 0, 0, asn_generic_no_constraint },
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0, 0, /* No members */
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0 /* No specifics */
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};
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static ssize_t
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RELATIVE_OID__dump_body(const RELATIVE_OID_t *st, asn_app_consume_bytes_f *cb, void *app_key) {
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char scratch[32];
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size_t produced = 0;
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size_t off = 0;
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for(;;) {
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asn_oid_arc_t arc;
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ssize_t rd = OBJECT_IDENTIFIER_get_single_arc(st->buf + off,
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st->size - off, &arc);
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if(rd < 0) {
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return -1;
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} else if(rd == 0) {
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/* No more arcs. */
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break;
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} else {
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int ret = snprintf(scratch, sizeof(scratch), "%s%" PRIu32,
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off ? "." : "", arc);
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if(ret >= (ssize_t)sizeof(scratch)) {
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return -1;
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}
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produced += ret;
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off += rd;
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assert(off <= st->size);
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if(cb(scratch, ret, app_key) < 0) return -1;
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}
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}
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if(off != st->size) {
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ASN_DEBUG("Could not scan to the end of Object Identifier");
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return -1;
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}
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return produced;
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}
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int
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RELATIVE_OID_print(const asn_TYPE_descriptor_t *td, const void *sptr,
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int ilevel, asn_app_consume_bytes_f *cb, void *app_key) {
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const RELATIVE_OID_t *st = (const RELATIVE_OID_t *)sptr;
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(void)td; /* Unused argument */
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(void)ilevel; /* Unused argument */
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if(!st || !st->buf)
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return (cb("<absent>", 8, app_key) < 0) ? -1 : 0;
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/* Dump preamble */
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if(cb("{ ", 2, app_key) < 0)
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return -1;
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if(RELATIVE_OID__dump_body(st, cb, app_key) < 0)
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return -1;
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return (cb(" }", 2, app_key) < 0) ? -1 : 0;
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}
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static enum xer_pbd_rval
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RELATIVE_OID__xer_body_decode(const asn_TYPE_descriptor_t *td, void *sptr,
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const void *chunk_buf, size_t chunk_size) {
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RELATIVE_OID_t *st = (RELATIVE_OID_t *)sptr;
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const char *chunk_end = (const char *)chunk_buf + chunk_size;
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const char *endptr;
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asn_oid_arc_t s_arcs[6];
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asn_oid_arc_t *arcs = s_arcs;
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ssize_t num_arcs;
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int ret;
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(void)td;
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num_arcs = OBJECT_IDENTIFIER_parse_arcs(
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(const char *)chunk_buf, chunk_size, arcs,
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sizeof(s_arcs) / sizeof(s_arcs[0]), &endptr);
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if(num_arcs < 0) {
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/* Expecting at least one arc arcs */
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return XPBD_BROKEN_ENCODING;
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} else if(num_arcs == 0) {
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return XPBD_NOT_BODY_IGNORE;
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}
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assert(endptr == chunk_end);
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if((size_t)num_arcs > sizeof(s_arcs) / sizeof(s_arcs[0])) {
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arcs = (asn_oid_arc_t *)MALLOC(num_arcs * sizeof(arcs[0]));
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if(!arcs) return XPBD_SYSTEM_FAILURE;
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ret = OBJECT_IDENTIFIER_parse_arcs((const char *)chunk_buf, chunk_size,
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arcs, num_arcs, &endptr);
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if(ret != num_arcs) {
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return XPBD_SYSTEM_FAILURE; /* assert?.. */
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}
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}
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/*
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* Convert arcs into BER representation.
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*/
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ret = RELATIVE_OID_set_arcs(st, arcs, num_arcs);
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if(arcs != s_arcs) FREEMEM(arcs);
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return ret ? XPBD_SYSTEM_FAILURE : XPBD_BODY_CONSUMED;
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}
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asn_dec_rval_t
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RELATIVE_OID_decode_xer(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 char *opt_mname, const void *buf_ptr,
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size_t size) {
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return xer_decode_primitive(opt_codec_ctx, td,
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sptr, sizeof(RELATIVE_OID_t), opt_mname,
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buf_ptr, size, RELATIVE_OID__xer_body_decode);
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}
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asn_enc_rval_t
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RELATIVE_OID_encode_xer(const asn_TYPE_descriptor_t *td, const void *sptr,
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int ilevel, enum xer_encoder_flags_e flags,
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asn_app_consume_bytes_f *cb, void *app_key) {
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const RELATIVE_OID_t *st = (const RELATIVE_OID_t *)sptr;
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asn_enc_rval_t er;
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(void)ilevel; /* Unused argument */
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(void)flags; /* Unused argument */
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if(!st || !st->buf)
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ASN__ENCODE_FAILED;
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er.encoded = RELATIVE_OID__dump_body(st, cb, app_key);
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if(er.encoded < 0) ASN__ENCODE_FAILED;
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ASN__ENCODED_OK(er);
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}
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ssize_t
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RELATIVE_OID_get_arcs(const RELATIVE_OID_t *st, asn_oid_arc_t *arcs,
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size_t arcs_count) {
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size_t num_arcs = 0;
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size_t off;
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if(!st || !st->buf) {
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errno = EINVAL;
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return -1;
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}
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for(off = 0;;) {
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asn_oid_arc_t arc;
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ssize_t rd = OBJECT_IDENTIFIER_get_single_arc(st->buf + off,
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st->size - off, &arc);
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if(rd < 0) {
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return -1;
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} else if(rd == 0) {
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/* No more arcs. */
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break;
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} else {
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off += rd;
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if(num_arcs < arcs_count) {
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arcs[num_arcs] = arc;
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}
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num_arcs++;
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}
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}
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if(off != st->size) {
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return -1;
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}
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return num_arcs;
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}
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int
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RELATIVE_OID_set_arcs(RELATIVE_OID_t *st, const asn_oid_arc_t *arcs,
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size_t arcs_count) {
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uint8_t *buf;
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uint8_t *bp;
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size_t size;
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size_t i;
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if(!st || !arcs) {
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errno = EINVAL;
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return -1;
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}
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/*
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* Roughly estimate the maximum size necessary to encode these arcs.
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*/
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size = ((sizeof(asn_oid_arc_t) * CHAR_BIT + 6) / 7) * arcs_count;
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bp = buf = (uint8_t *)MALLOC(size + 1);
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if(!buf) {
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/* ENOMEM */
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return -1;
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}
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/*
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* Encode the arcs.
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*/
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for(i = 0; i < arcs_count; i++) {
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ssize_t wrote = OBJECT_IDENTIFIER_set_single_arc(bp, size, arcs[i]);
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if(wrote <= 0) {
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FREEMEM(buf);
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return -1;
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}
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assert((size_t)wrote <= size);
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bp += wrote;
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size -= wrote;
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}
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/*
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* Replace buffer.
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*/
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st->size = bp - buf;
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bp = st->buf;
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st->buf = buf;
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st->buf[st->size] = '\0';
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if(bp) FREEMEM(bp);
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return 0;
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}
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/*
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* Generate values from the list of interesting values, or just a random value.
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*/
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static asn_oid_arc_t
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RELATIVE_OID__biased_random_arc() {
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static const uint16_t values[] = {0, 1, 127, 128, 129, 254, 255, 256};
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switch(asn_random_between(0, 2)) {
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case 0:
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return values[asn_random_between(
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0, sizeof(values) / sizeof(values[0]) - 1)];
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case 1:
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return asn_random_between(0, UINT_MAX);
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case 2:
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default:
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return UINT_MAX;
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}
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}
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asn_random_fill_result_t
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RELATIVE_OID_random_fill(const asn_TYPE_descriptor_t *td, void **sptr,
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const asn_encoding_constraints_t *constraints,
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size_t max_length) {
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asn_random_fill_result_t result_ok = {ARFILL_OK, 1};
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asn_random_fill_result_t result_failed = {ARFILL_FAILED, 0};
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asn_random_fill_result_t result_skipped = {ARFILL_SKIPPED, 0};
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RELATIVE_OID_t *st;
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const int min_arcs = 1; /* A minimum of 1 arc is required */
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asn_oid_arc_t arcs[3];
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size_t arcs_len =
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asn_random_between(min_arcs, sizeof(arcs) / sizeof(arcs[0]));
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size_t i;
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(void)constraints;
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if(max_length < arcs_len) return result_skipped;
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if(*sptr) {
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st = *sptr;
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} else {
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st = CALLOC(1, sizeof(*st));
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}
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for(i = 0; i < arcs_len; i++) {
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arcs[i] = RELATIVE_OID__biased_random_arc();
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}
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if(RELATIVE_OID_set_arcs(st, arcs, arcs_len)) {
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if(st != *sptr) {
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ASN_STRUCT_FREE(*td, st);
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}
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return result_failed;
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}
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*sptr = st;
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result_ok.length = st->size;
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return result_ok;
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}
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