Harald Welte | d523a69 | 2015-08-30 23:11:19 +0200 | [diff] [blame] | 1 | /*- |
| 2 | * Copyright (c) 2004, 2007 Lev Walkin <vlm@lionet.info>. All rights reserved. |
| 3 | * Redistribution and modifications are permitted subject to BSD license. |
| 4 | */ |
| 5 | /* |
| 6 | * Read the NativeInteger.h for the explanation wrt. differences between |
| 7 | * INTEGER and NativeInteger. |
| 8 | * Basically, both are decoders and encoders of ASN.1 INTEGER type, but this |
| 9 | * implementation deals with the standard (machine-specific) representation |
| 10 | * of them instead of using the platform-independent buffer. |
| 11 | */ |
| 12 | #include <asn_internal.h> |
| 13 | #include <NativeEnumerated.h> |
| 14 | |
| 15 | /* |
| 16 | * NativeEnumerated basic type description. |
| 17 | */ |
| 18 | static const ber_tlv_tag_t asn_DEF_NativeEnumerated_tags[] = { |
| 19 | (ASN_TAG_CLASS_UNIVERSAL | (10 << 2)) |
| 20 | }; |
| 21 | asn_TYPE_descriptor_t asn_DEF_NativeEnumerated = { |
| 22 | "ENUMERATED", /* The ASN.1 type is still ENUMERATED */ |
| 23 | "ENUMERATED", |
| 24 | NativeInteger_free, |
| 25 | NativeInteger_print, |
| 26 | asn_generic_no_constraint, |
| 27 | NativeInteger_decode_ber, |
| 28 | NativeInteger_encode_der, |
| 29 | NativeInteger_decode_xer, |
| 30 | NativeEnumerated_encode_xer, |
| 31 | NativeEnumerated_decode_uper, |
| 32 | NativeEnumerated_encode_uper, |
| 33 | NativeEnumerated_decode_aper, |
| 34 | NativeEnumerated_encode_aper, |
| 35 | 0, /* Use generic outmost tag fetcher */ |
| 36 | asn_DEF_NativeEnumerated_tags, |
| 37 | sizeof(asn_DEF_NativeEnumerated_tags) / sizeof(asn_DEF_NativeEnumerated_tags[0]), |
| 38 | asn_DEF_NativeEnumerated_tags, /* Same as above */ |
| 39 | sizeof(asn_DEF_NativeEnumerated_tags) / sizeof(asn_DEF_NativeEnumerated_tags[0]), |
| 40 | 0, /* No PER visible constraints */ |
| 41 | 0, 0, /* No members */ |
| 42 | 0 /* No specifics */ |
| 43 | }; |
| 44 | |
| 45 | asn_enc_rval_t |
| 46 | NativeEnumerated_encode_xer(asn_TYPE_descriptor_t *td, void *sptr, |
| 47 | int ilevel, enum xer_encoder_flags_e flags, |
| 48 | asn_app_consume_bytes_f *cb, void *app_key) { |
| 49 | asn_INTEGER_specifics_t *specs=(asn_INTEGER_specifics_t *)td->specifics; |
| 50 | asn_enc_rval_t er; |
| 51 | const long *native = (const long *)sptr; |
| 52 | const asn_INTEGER_enum_map_t *el; |
| 53 | |
| 54 | (void)ilevel; |
| 55 | (void)flags; |
| 56 | |
| 57 | if(!native) _ASN_ENCODE_FAILED; |
| 58 | |
| 59 | el = INTEGER_map_value2enum(specs, *native); |
| 60 | if(el) { |
| 61 | size_t srcsize = el->enum_len + 5; |
| 62 | char *src = (char *)alloca(srcsize); |
| 63 | |
| 64 | er.encoded = snprintf(src, srcsize, "<%s/>", el->enum_name); |
| 65 | assert(er.encoded > 0 && (size_t)er.encoded < srcsize); |
| 66 | if(cb(src, er.encoded, app_key) < 0) _ASN_ENCODE_FAILED; |
| 67 | _ASN_ENCODED_OK(er); |
| 68 | } else { |
| 69 | ASN_DEBUG("ASN.1 forbids dealing with " |
| 70 | "unknown value of ENUMERATED type"); |
| 71 | _ASN_ENCODE_FAILED; |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | asn_dec_rval_t |
| 76 | NativeEnumerated_decode_uper(asn_codec_ctx_t *opt_codec_ctx, |
| 77 | asn_TYPE_descriptor_t *td, asn_per_constraints_t *constraints, |
| 78 | void **sptr, asn_per_data_t *pd) { |
| 79 | asn_INTEGER_specifics_t *specs = (asn_INTEGER_specifics_t *)td->specifics; |
| 80 | asn_dec_rval_t rval = { RC_OK, 0 }; |
| 81 | long *native = (long *)*sptr; |
| 82 | asn_per_constraint_t *ct; |
| 83 | long value; |
| 84 | |
| 85 | (void)opt_codec_ctx; |
| 86 | |
| 87 | if(constraints) ct = &constraints->value; |
| 88 | else if(td->per_constraints) ct = &td->per_constraints->value; |
| 89 | else _ASN_DECODE_FAILED; /* Mandatory! */ |
| 90 | if(!specs) _ASN_DECODE_FAILED; |
| 91 | |
| 92 | if(!native) { |
| 93 | native = (long *)(*sptr = CALLOC(1, sizeof(*native))); |
| 94 | if(!native) _ASN_DECODE_FAILED; |
| 95 | } |
| 96 | |
| 97 | ASN_DEBUG("Decoding %s as NativeEnumerated", td->name); |
| 98 | |
| 99 | if(ct->flags & APC_EXTENSIBLE) { |
| 100 | int inext = per_get_few_bits(pd, 1); |
| 101 | if(inext < 0) _ASN_DECODE_STARVED; |
| 102 | if(inext) ct = 0; |
| 103 | } |
| 104 | |
| 105 | if(ct && ct->range_bits >= 0) { |
| 106 | value = per_get_few_bits(pd, ct->range_bits); |
| 107 | if(value < 0) _ASN_DECODE_STARVED; |
| 108 | if(value >= (specs->extension |
| 109 | ? specs->extension - 1 : specs->map_count)) |
| 110 | _ASN_DECODE_FAILED; |
| 111 | } else { |
| 112 | if(!specs->extension) |
| 113 | _ASN_DECODE_FAILED; |
| 114 | /* |
| 115 | * X.691, #10.6: normally small non-negative whole number; |
| 116 | */ |
| 117 | value = uper_get_nsnnwn(pd); |
| 118 | if(value < 0) _ASN_DECODE_STARVED; |
| 119 | value += specs->extension - 1; |
| 120 | if(value >= specs->map_count) |
| 121 | _ASN_DECODE_FAILED; |
| 122 | } |
| 123 | |
| 124 | *native = specs->value2enum[value].nat_value; |
| 125 | ASN_DEBUG("Decoded %s = %ld", td->name, *native); |
| 126 | |
| 127 | return rval; |
| 128 | } |
| 129 | |
| 130 | asn_dec_rval_t |
| 131 | NativeEnumerated_decode_aper(asn_codec_ctx_t *opt_codec_ctx, |
| 132 | asn_TYPE_descriptor_t *td, asn_per_constraints_t *constraints, |
| 133 | void **sptr, asn_per_data_t *pd) { |
| 134 | asn_INTEGER_specifics_t *specs = (asn_INTEGER_specifics_t *)td->specifics; |
| 135 | asn_dec_rval_t rval = { RC_OK, 0 }; |
| 136 | long *native = (long *)*sptr; |
| 137 | asn_per_constraint_t *ct; |
| 138 | long value; |
| 139 | |
| 140 | (void)opt_codec_ctx; |
| 141 | |
| 142 | if(constraints) ct = &constraints->value; |
| 143 | else if(td->per_constraints) ct = &td->per_constraints->value; |
| 144 | else _ASN_DECODE_FAILED; /* Mandatory! */ |
| 145 | if(!specs) _ASN_DECODE_FAILED; |
| 146 | |
| 147 | if(!native) { |
| 148 | native = (long *)(*sptr = CALLOC(1, sizeof(*native))); |
| 149 | if(!native) _ASN_DECODE_FAILED; |
| 150 | } |
| 151 | |
| 152 | ASN_DEBUG("Decoding %s as NativeEnumerated", td->name); |
| 153 | |
| 154 | if(ct->flags & APC_EXTENSIBLE) { |
| 155 | int inext = per_get_few_bits(pd, 1); |
| 156 | if(inext < 0) _ASN_DECODE_STARVED; |
| 157 | if(inext) ct = 0; |
| 158 | } |
| 159 | |
| 160 | if(ct && ct->range_bits >= 0) { |
| 161 | value = per_get_few_bits(pd, ct->range_bits); |
| 162 | if(value < 0) _ASN_DECODE_STARVED; |
| 163 | if(value >= (specs->extension |
| 164 | ? specs->extension - 1 : specs->map_count)) |
| 165 | _ASN_DECODE_FAILED; |
| 166 | } else { |
| 167 | if(!specs->extension) |
| 168 | _ASN_DECODE_FAILED; |
| 169 | /* |
| 170 | * X.691, #10.6: normally small non-negative whole number; |
| 171 | */ |
| 172 | value = uper_get_nsnnwn(pd); |
| 173 | if(value < 0) _ASN_DECODE_STARVED; |
| 174 | value += specs->extension - 1; |
| 175 | if(value >= specs->map_count) |
| 176 | _ASN_DECODE_FAILED; |
| 177 | } |
| 178 | |
| 179 | *native = specs->value2enum[value].nat_value; |
| 180 | ASN_DEBUG("Decoded %s = %ld", td->name, *native); |
| 181 | |
| 182 | return rval; |
| 183 | } |
| 184 | |
| 185 | static int |
| 186 | NativeEnumerated__compar_value2enum(const void *ap, const void *bp) { |
| 187 | const asn_INTEGER_enum_map_t *a = ap; |
| 188 | const asn_INTEGER_enum_map_t *b = bp; |
| 189 | if(a->nat_value == b->nat_value) |
| 190 | return 0; |
| 191 | if(a->nat_value < b->nat_value) |
| 192 | return -1; |
| 193 | return 1; |
| 194 | } |
| 195 | |
| 196 | asn_enc_rval_t |
| 197 | NativeEnumerated_encode_uper(asn_TYPE_descriptor_t *td, |
| 198 | asn_per_constraints_t *constraints, void *sptr, asn_per_outp_t *po) { |
| 199 | asn_INTEGER_specifics_t *specs = (asn_INTEGER_specifics_t *)td->specifics; |
| 200 | asn_enc_rval_t er; |
| 201 | long native, value; |
| 202 | asn_per_constraint_t *ct; |
| 203 | int inext = 0; |
| 204 | asn_INTEGER_enum_map_t key; |
| 205 | const asn_INTEGER_enum_map_t *kf; |
| 206 | |
| 207 | if(!sptr) _ASN_ENCODE_FAILED; |
| 208 | if(!specs) _ASN_ENCODE_FAILED; |
| 209 | |
| 210 | if(constraints) ct = &constraints->value; |
| 211 | else if(td->per_constraints) ct = &td->per_constraints->value; |
| 212 | else _ASN_ENCODE_FAILED; /* Mandatory! */ |
| 213 | |
| 214 | ASN_DEBUG("Encoding %s as NativeEnumerated", td->name); |
| 215 | |
| 216 | er.encoded = 0; |
| 217 | |
| 218 | native = *(long *)sptr; |
| 219 | if(native < 0) _ASN_ENCODE_FAILED; |
| 220 | |
| 221 | key.nat_value = native; |
| 222 | kf = bsearch(&key, specs->value2enum, specs->map_count, |
| 223 | sizeof(key), NativeEnumerated__compar_value2enum); |
| 224 | if(!kf) { |
| 225 | ASN_DEBUG("No element corresponds to %ld", native); |
| 226 | _ASN_ENCODE_FAILED; |
| 227 | } |
| 228 | value = kf - specs->value2enum; |
| 229 | |
| 230 | if(ct->range_bits >= 0) { |
| 231 | int cmpWith = specs->extension |
| 232 | ? specs->extension - 1 : specs->map_count; |
| 233 | if(value >= cmpWith) |
| 234 | inext = 1; |
| 235 | } |
| 236 | if(ct->flags & APC_EXTENSIBLE) { |
| 237 | if(per_put_few_bits(po, inext, 1)) |
| 238 | _ASN_ENCODE_FAILED; |
| 239 | if(inext) ct = 0; |
| 240 | } else if(inext) { |
| 241 | _ASN_ENCODE_FAILED; |
| 242 | } |
| 243 | |
| 244 | if(ct && ct->range_bits >= 0) { |
| 245 | if(per_put_few_bits(po, value, ct->range_bits)) |
| 246 | _ASN_ENCODE_FAILED; |
| 247 | _ASN_ENCODED_OK(er); |
| 248 | } |
| 249 | |
| 250 | if(!specs->extension) |
| 251 | _ASN_ENCODE_FAILED; |
| 252 | |
| 253 | /* |
| 254 | * X.691, #10.6: normally small non-negative whole number; |
| 255 | */ |
| 256 | ASN_DEBUG("value = %ld, ext = %d, inext = %d, res = %ld", |
| 257 | value, specs->extension, inext, |
| 258 | value - (inext ? (specs->extension - 1) : 0)); |
| 259 | if(uper_put_nsnnwn(po, value - (inext ? (specs->extension - 1) : 0))) |
| 260 | _ASN_ENCODE_FAILED; |
| 261 | |
| 262 | _ASN_ENCODED_OK(er); |
| 263 | } |
| 264 | |
| 265 | asn_enc_rval_t |
| 266 | NativeEnumerated_encode_aper(asn_TYPE_descriptor_t *td, |
| 267 | asn_per_constraints_t *constraints, void *sptr, asn_per_outp_t *po) { |
| 268 | asn_INTEGER_specifics_t *specs = (asn_INTEGER_specifics_t *)td->specifics; |
| 269 | asn_enc_rval_t er; |
| 270 | long native, value; |
| 271 | asn_per_constraint_t *ct; |
| 272 | int inext = 0; |
| 273 | asn_INTEGER_enum_map_t key; |
| 274 | asn_INTEGER_enum_map_t *kf; |
| 275 | |
| 276 | if(!sptr) _ASN_ENCODE_FAILED; |
| 277 | if(!specs) _ASN_ENCODE_FAILED; |
| 278 | |
| 279 | if(constraints) ct = &constraints->value; |
| 280 | else if(td->per_constraints) ct = &td->per_constraints->value; |
| 281 | else _ASN_ENCODE_FAILED; /* Mandatory! */ |
| 282 | |
| 283 | ASN_DEBUG("Encoding %s as NativeEnumerated", td->name); |
| 284 | |
| 285 | er.encoded = 0; |
| 286 | |
| 287 | native = *(long *)sptr; |
| 288 | if(native < 0) _ASN_ENCODE_FAILED; |
| 289 | |
| 290 | key.nat_value = native; |
| 291 | kf = bsearch(&key, specs->value2enum, specs->map_count, |
| 292 | sizeof(key), NativeEnumerated__compar_value2enum); |
| 293 | if(!kf) { |
| 294 | ASN_DEBUG("No element corresponds to %ld", native); |
| 295 | _ASN_ENCODE_FAILED; |
| 296 | } |
| 297 | value = kf - specs->value2enum; |
| 298 | |
| 299 | if(ct->range_bits >= 0) { |
| 300 | int cmpWith = specs->extension |
| 301 | ? specs->extension - 1 : specs->map_count; |
| 302 | if(value >= cmpWith) |
| 303 | inext = 1; |
| 304 | } |
| 305 | if(ct->flags & APC_EXTENSIBLE) { |
| 306 | if(per_put_few_bits(po, inext, 1)) |
| 307 | _ASN_ENCODE_FAILED; |
| 308 | if(inext) ct = 0; |
| 309 | } else if(inext) { |
| 310 | _ASN_ENCODE_FAILED; |
| 311 | } |
| 312 | |
| 313 | if(ct && ct->range_bits >= 0) { |
| 314 | if(per_put_few_bits(po, value, ct->range_bits)) |
| 315 | _ASN_ENCODE_FAILED; |
| 316 | _ASN_ENCODED_OK(er); |
| 317 | } |
| 318 | |
| 319 | if(!specs->extension) |
| 320 | _ASN_ENCODE_FAILED; |
| 321 | |
| 322 | /* |
| 323 | * X.691, #10.6: normally small non-negative whole number; |
| 324 | */ |
| 325 | ASN_DEBUG("value = %ld, ext = %d, inext = %d, res = %ld", |
| 326 | value, specs->extension, inext, |
| 327 | value - (inext ? (specs->extension - 1) : 0)); |
| 328 | if(uper_put_nsnnwn(po, value - (inext ? (specs->extension - 1) : 0))) |
| 329 | _ASN_ENCODE_FAILED; |
| 330 | |
| 331 | _ASN_ENCODED_OK(er); |
| 332 | } |
| 333 | |