Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017 Lev Walkin <vlm@lionet.info>. |
| 3 | * All rights reserved. |
| 4 | * Redistribution and modifications are permitted subject to BSD license. |
| 5 | */ |
| 6 | #ifndef ASN_DISABLE_OER_SUPPORT |
| 7 | |
| 8 | #include <asn_internal.h> |
| 9 | #include <constr_SEQUENCE.h> |
| 10 | #include <errno.h> |
| 11 | |
| 12 | /* |
| 13 | * This macro "eats" the part of the buffer which is definitely "consumed", |
| 14 | * i.e. was correctly converted into local representation or rightfully skipped. |
| 15 | */ |
| 16 | #undef ADVANCE |
| 17 | #define ADVANCE(num_bytes) \ |
| 18 | do { \ |
| 19 | size_t num = num_bytes; \ |
| 20 | ptr = ((const char *)ptr) + num; \ |
| 21 | size -= num; \ |
| 22 | consumed_myself += num; \ |
| 23 | } while(0) |
| 24 | |
| 25 | /* |
| 26 | * Switch to the next phase of parsing. |
| 27 | */ |
| 28 | #undef NEXT_PHASE |
| 29 | #undef PHASE_OUT |
| 30 | #define NEXT_PHASE(ctx) \ |
| 31 | do { \ |
| 32 | ctx->phase++; \ |
| 33 | ctx->step = 0; \ |
| 34 | } while(0) |
| 35 | |
| 36 | /* |
| 37 | * Check whether we are inside the extensions group. |
| 38 | */ |
| 39 | #define IN_EXTENSION_GROUP(specs, memb_idx) \ |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 40 | ( (((ssize_t)(memb_idx)) > (specs)->ext_after) \ |
| 41 | &&(((ssize_t)(memb_idx)) < (specs)->ext_before)) |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 42 | |
| 43 | /* |
| 44 | * Return a standardized complex structure. |
| 45 | */ |
| 46 | #undef RETURN |
| 47 | #define RETURN(_code) do { \ |
| 48 | rval.code = _code; \ |
| 49 | rval.consumed = consumed_myself;\ |
| 50 | return rval; \ |
| 51 | } while(0) |
| 52 | |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 53 | /* |
| 54 | * Return pointer to a member. |
| 55 | */ |
| 56 | static void **element_ptrptr(void *struct_ptr, asn_TYPE_member_t *elm) { |
| 57 | assert(elm->flags & ATF_POINTER); |
| 58 | /* Member is a pointer to another structure */ |
| 59 | return (void **)((char *)struct_ptr + elm->memb_offset); |
| 60 | } |
| 61 | |
| 62 | static void *element_ptr(void *struct_ptr, asn_TYPE_member_t *elm) { |
| 63 | if(elm->flags & ATF_POINTER) { |
| 64 | /* Member is a pointer to another structure */ |
| 65 | return *(void **)((char *)struct_ptr + elm->memb_offset); |
| 66 | } else { |
| 67 | return (void *)((char *)struct_ptr + elm->memb_offset); |
| 68 | } |
| 69 | } |
| 70 | |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 71 | asn_dec_rval_t |
| 72 | SEQUENCE_decode_oer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td, |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 73 | const asn_oer_constraints_t *constraints, void **struct_ptr, |
| 74 | const void *ptr, size_t size) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 75 | asn_SEQUENCE_specifics_t *specs = (asn_SEQUENCE_specifics_t *)td->specifics; |
| 76 | asn_dec_rval_t rval = {RC_OK, 0}; |
| 77 | void *st = *struct_ptr; /* Target structure */ |
| 78 | asn_struct_ctx_t *ctx; /* Decoder context */ |
| 79 | size_t consumed_myself = 0; /* Consumed bytes from ptr. */ |
| 80 | |
| 81 | |
| 82 | (void)opt_codec_ctx; |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 83 | (void)constraints; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 84 | |
| 85 | /* |
| 86 | * Create the target structure if it is not present already. |
| 87 | */ |
| 88 | if(st == 0) { |
| 89 | st = *struct_ptr = CALLOC(1, specs->struct_size); |
| 90 | if(st == 0) { |
| 91 | RETURN(RC_FAIL); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | /* |
| 96 | * Restore parsing context. |
| 97 | */ |
| 98 | ctx = (asn_struct_ctx_t *)((char *)st + specs->ctx_offset); |
| 99 | if(ctx->ptr == 0) { |
| 100 | ctx->ptr = CALLOC(1, sizeof(asn_per_data_t)); |
| 101 | if(!ctx->ptr) { |
| 102 | RETURN(RC_FAIL); |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | /* |
| 107 | * Start to parse where left previously. |
| 108 | */ |
| 109 | switch(ctx->phase) { |
| 110 | case 0: { |
| 111 | /* |
| 112 | * Fetch preamble. |
| 113 | */ |
| 114 | asn_per_data_t *preamble = ctx->ptr; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 115 | int has_extensions_bit = (specs->ext_before >= 0); |
| 116 | size_t preamble_bits = (has_extensions_bit + specs->roms_count); |
| 117 | size_t preamble_bytes = ((7 + preamble_bits) >> 3); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 118 | uint8_t *pbytes; |
| 119 | |
Lev Walkin | bc0b0c5 | 2017-08-02 14:02:48 -0700 | [diff] [blame] | 120 | ASN_DEBUG("OER SEQUENCE %s Decoding PHASE 0", td->name); |
| 121 | |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 122 | ASN_DEBUG( |
| 123 | "Expecting preamble bits %zu for %s (including %d extension bits)", |
| 124 | preamble_bits, td->name, has_extensions_bit); |
| 125 | |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 126 | if(size < preamble_bytes) { |
| 127 | ASN__DECODE_STARVED; |
| 128 | } |
| 129 | |
| 130 | pbytes = MALLOC(preamble_bytes + 1); |
| 131 | if(!pbytes) { |
| 132 | RETURN(RC_FAIL); |
| 133 | } |
| 134 | preamble->buffer = (const void *)pbytes; |
| 135 | memcpy(pbytes, ptr, preamble_bytes); |
| 136 | pbytes[preamble_bytes] = '\0'; /* Just in case */ |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 137 | preamble->nboff = has_extensions_bit; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 138 | preamble->nbits = preamble_bits; |
| 139 | ADVANCE(preamble_bytes); |
| 140 | } |
| 141 | NEXT_PHASE(ctx); |
| 142 | /* FALL THROUGH */ |
| 143 | case 1: { |
| 144 | /* Decode components of the extension root */ |
| 145 | asn_per_data_t *preamble = ctx->ptr; |
| 146 | size_t edx; |
| 147 | |
Lev Walkin | bc0b0c5 | 2017-08-02 14:02:48 -0700 | [diff] [blame] | 148 | ASN_DEBUG("OER SEQUENCE %s Decoding PHASE 1", td->name); |
| 149 | |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 150 | for(edx = (ctx->step >> 1); edx < td->elements_count; |
| 151 | edx++, ctx->step = (ctx->step & ~1) + 2) { |
| 152 | asn_TYPE_member_t *elm = &td->elements[edx]; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 153 | void *memb_tmpptr; /* Temporary reference. */ |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 154 | void **memb_ptr2; /* Pointer to a pointer to a memmber */ |
| 155 | |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 156 | ASN_DEBUG("Decoding %s->%s", td->name, elm->name); |
| 157 | |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 158 | if(ctx->step & 1) { |
| 159 | goto microphase2_decode_continues; |
| 160 | } |
| 161 | |
| 162 | |
| 163 | if(IN_EXTENSION_GROUP(specs, edx)) { |
| 164 | /* Ignore non-root components in PHASE 1 */ |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 165 | break; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 166 | } |
| 167 | |
| 168 | if(elm->optional) { |
| 169 | int32_t present = per_get_few_bits(preamble, 1); |
| 170 | if(present < 0) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 171 | ASN_DEBUG("Presence map ended prematurely: %d", present); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 172 | RETURN(RC_FAIL); |
| 173 | } else if(present == 0) { |
| 174 | if(elm->default_value) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 175 | /* Fill-in DEFAULT */ |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 176 | if(elm->default_value(1, element_ptrptr(st, elm))) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 177 | RETURN(RC_FAIL); |
| 178 | } |
| 179 | } |
| 180 | /* The member is not present. */ |
| 181 | continue; |
| 182 | } |
| 183 | /* Present OPTIONAL or DEFAULT component. */ |
| 184 | } |
| 185 | |
| 186 | /* |
| 187 | * MICROPHASE 2: Invoke the member-specific decoder. |
| 188 | */ |
| 189 | ctx->step |= 1; /* Confirm entering next microphase */ |
| 190 | microphase2_decode_continues: |
| 191 | if(elm->flags & ATF_POINTER) { |
| 192 | /* Member is a pointer to another structure */ |
| 193 | memb_ptr2 = (void **)((char *)st + elm->memb_offset); |
| 194 | } else { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 195 | memb_tmpptr = (char *)st + elm->memb_offset; |
| 196 | memb_ptr2 = &memb_tmpptr; /* Ensure this & remains in scope! */ |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 197 | } |
| 198 | |
Lev Walkin | 7c87630 | 2017-08-10 06:11:24 -0700 | [diff] [blame] | 199 | if((elm->flags & ATF_OPEN_TYPE) && elm->type_selector) { |
| 200 | asn_TYPE_descriptor_t *et = elm->type_selector(td, st); |
| 201 | ssize_t ot_ret; |
| 202 | if(!et) { |
| 203 | ASN__DECODE_FAILED; |
| 204 | } |
| 205 | ot_ret = oer_open_type_get(opt_codec_ctx, et, NULL, memb_ptr2, |
| 206 | ptr, size); |
| 207 | switch(ot_ret) { |
| 208 | case -1: |
| 209 | rval.code = RC_FAIL; |
| 210 | rval.consumed = 0; |
| 211 | break; |
| 212 | case 0: |
| 213 | rval.code = RC_WMORE; |
| 214 | rval.consumed = 1; |
| 215 | break; |
| 216 | default: |
| 217 | rval.code = RC_OK; |
| 218 | rval.consumed = ot_ret; |
| 219 | break; |
| 220 | } |
| 221 | } else { |
| 222 | rval = elm->type->oer_decoder(opt_codec_ctx, elm->type, |
| 223 | elm->oer_constraints, memb_ptr2, |
| 224 | ptr, size); |
| 225 | } |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 226 | switch(rval.code) { |
| 227 | case RC_OK: |
| 228 | ADVANCE(rval.consumed); |
| 229 | break; |
| 230 | case RC_WMORE: |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 231 | ASN_DEBUG("More bytes needed at element %s \"%s\"", td->name, |
| 232 | elm->name); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 233 | ADVANCE(rval.consumed); |
| 234 | RETURN(RC_WMORE); |
| 235 | case RC_FAIL: |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 236 | ASN_DEBUG("Decoding failed at element %s \"%s\"", td->name, |
| 237 | elm->name); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 238 | RETURN(RC_FAIL); |
| 239 | } |
| 240 | } /* for(all root members) */ |
| 241 | |
| 242 | } |
| 243 | NEXT_PHASE(ctx); |
| 244 | /* FALL THROUGH */ |
| 245 | case 2: { |
| 246 | /* Cleanup preamble. */ |
| 247 | asn_per_data_t *preamble = ctx->ptr; |
| 248 | asn_per_data_t *extadds; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 249 | int has_extensions_bit = (specs->ext_before >= 0); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 250 | int extensions_present = |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 251 | has_extensions_bit && (((const uint8_t *)preamble->buffer)[0] & 0x80); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 252 | uint8_t unused_bits; |
| 253 | size_t len = 0; |
| 254 | ssize_t len_len; |
| 255 | uint8_t *ebytes; |
| 256 | |
| 257 | union { |
| 258 | const uint8_t *cptr; |
| 259 | uint8_t *uptr; |
| 260 | } unconst; |
Lev Walkin | bc0b0c5 | 2017-08-02 14:02:48 -0700 | [diff] [blame] | 261 | |
| 262 | ASN_DEBUG("OER SEQUENCE %s Decoding PHASE 2", td->name); |
| 263 | |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 264 | unconst.cptr = preamble->buffer; |
| 265 | FREEMEM(unconst.uptr); |
| 266 | preamble->buffer = 0; |
| 267 | |
| 268 | if(!extensions_present) { |
| 269 | ctx->phase = 10; |
| 270 | RETURN(RC_OK); |
| 271 | } |
| 272 | |
| 273 | /* |
| 274 | * X.696 (08/2015) #16.1 (c), #16.4 |
| 275 | * Read in the extension addition presence bitmap. |
| 276 | */ |
| 277 | |
| 278 | len_len = oer_fetch_length(ptr, size, &len); |
| 279 | if(len_len > 0) { |
| 280 | ADVANCE(len_len); |
| 281 | } if(len_len < 0) { |
| 282 | RETURN(RC_FAIL); |
| 283 | } else { |
| 284 | RETURN(RC_WMORE); |
| 285 | } |
| 286 | |
| 287 | if(len == 0) { |
| 288 | /* 16.4.1-2 */ |
| 289 | RETURN(RC_FAIL); |
| 290 | } else if(len > size) { |
| 291 | RETURN(RC_WMORE); |
| 292 | } |
| 293 | |
| 294 | /* Account for unused bits */ |
| 295 | unused_bits = 0x7 & *(const uint8_t *)ptr; |
| 296 | ADVANCE(1); |
| 297 | len--; |
| 298 | if(unused_bits && len == 0) { |
| 299 | RETURN(RC_FAIL); |
| 300 | } |
| 301 | |
| 302 | /* Get the extensions map */ |
| 303 | ebytes = MALLOC(len + 1); |
| 304 | if(!ebytes) { |
| 305 | RETURN(RC_FAIL); |
| 306 | } |
| 307 | memcpy(ebytes, ptr, len); |
| 308 | ebytes[len] = '\0'; |
| 309 | |
| 310 | extadds = preamble; |
| 311 | memset(extadds, 0, sizeof(*extadds)); |
| 312 | extadds->buffer = ebytes; |
| 313 | extadds->nboff = 0; |
| 314 | extadds->nbits = 8 * len - unused_bits; |
| 315 | |
| 316 | ADVANCE(len); |
| 317 | } |
| 318 | NEXT_PHASE(ctx); |
| 319 | ctx->step = (specs->ext_after + 1); |
| 320 | /* Fall through */ |
| 321 | case 3: |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 322 | ASN_DEBUG("OER SEQUENCE %s Decoding PHASE 3", td->name); |
| 323 | for(; ctx->step < specs->ext_before - 1; ctx->step++) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 324 | asn_per_data_t *extadds = ctx->ptr; |
| 325 | size_t edx = ctx->step; |
| 326 | asn_TYPE_member_t *elm = &td->elements[edx]; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 327 | void **memb_ptr2 = element_ptrptr(st, elm); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 328 | |
| 329 | switch(per_get_few_bits(extadds, 1)) { |
| 330 | case -1: |
| 331 | /* |
| 332 | * Not every one of our extensions is known to the remote side. |
| 333 | * Continue filling in their defaults though. |
| 334 | */ |
| 335 | /* Fall through */ |
| 336 | case 0: |
| 337 | /* Fill-in DEFAULT */ |
| 338 | if(elm->default_value && elm->default_value(1, memb_ptr2)) { |
| 339 | RETURN(RC_FAIL); |
| 340 | } |
| 341 | continue; |
| 342 | case 1: { |
| 343 | /* Read OER open type */ |
| 344 | ssize_t ot_size = oer_open_type_get(opt_codec_ctx, elm->type, |
| 345 | elm->oer_constraints, |
| 346 | memb_ptr2, ptr, size); |
| 347 | if(ot_size > 0) { |
| 348 | ADVANCE(ot_size); |
| 349 | } else if(ot_size < 0) { |
| 350 | RETURN(RC_FAIL); |
| 351 | } else { |
| 352 | /* Roll back open type parsing */ |
| 353 | per_get_undo(extadds, 1); |
| 354 | ASN_STRUCT_FREE(*elm->type, *memb_ptr2); |
| 355 | *memb_ptr2 = NULL; |
| 356 | RETURN(RC_WMORE); |
| 357 | } |
| 358 | break; |
| 359 | } |
| 360 | default: |
| 361 | RETURN(RC_FAIL); |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | NEXT_PHASE(ctx); |
| 366 | /* Fall through */ |
| 367 | case 4: |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 368 | ASN_DEBUG("OER SEQUENCE %s Decoding PHASE 4", td->name); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 369 | /* Read in the rest of Open Types while ignoring them */ |
| 370 | for(;;) { |
| 371 | asn_per_data_t *extadds = ctx->ptr; |
| 372 | switch(per_get_few_bits(extadds, 1)) { |
| 373 | case 0: |
| 374 | continue; |
| 375 | case 1: { |
Lev Walkin | 51a1f3f | 2017-07-20 14:52:25 +0300 | [diff] [blame] | 376 | ssize_t skipped = oer_open_type_skip(ptr, size); |
| 377 | if(skipped > 0) { |
| 378 | ADVANCE(skipped); |
| 379 | } else if(skipped < 0) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 380 | RETURN(RC_FAIL); |
| 381 | } else { |
| 382 | per_get_undo(extadds, 1); |
| 383 | RETURN(RC_WMORE); |
| 384 | } |
| 385 | continue; |
| 386 | } |
| 387 | case -1: |
| 388 | /* No more Open Type encoded components */ |
| 389 | break; |
| 390 | default: |
| 391 | RETURN(RC_FAIL); |
| 392 | } |
| 393 | break; |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | return rval; |
| 398 | } |
| 399 | |
| 400 | /* |
| 401 | * Encode as Canonical OER. |
| 402 | */ |
| 403 | asn_enc_rval_t |
| 404 | SEQUENCE_encode_oer(asn_TYPE_descriptor_t *td, |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 405 | const asn_oer_constraints_t *constraints, void *sptr, |
| 406 | asn_app_consume_bytes_f *cb, void *app_key) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 407 | asn_SEQUENCE_specifics_t *specs = (asn_SEQUENCE_specifics_t *)td->specifics; |
| 408 | size_t computed_size = 0; |
| 409 | int has_extensions_bit = (specs->ext_before >= 0); |
| 410 | size_t preamble_bits = (has_extensions_bit + specs->roms_count); |
| 411 | uint32_t has_extensions = 0; |
| 412 | size_t edx; |
| 413 | int ret; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 414 | |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 415 | (void)constraints; |
| 416 | |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 417 | if(preamble_bits) { |
| 418 | asn_per_outp_t preamble; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 419 | |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 420 | memset(&preamble, 0, sizeof(preamble)); |
| 421 | preamble.outper = cb; |
| 422 | preamble.op_key = app_key; |
| 423 | |
| 424 | if(has_extensions_bit) { |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 425 | for(edx = specs->ext_after + 1; |
| 426 | (ssize_t)edx < specs->ext_before - 1; edx++) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 427 | asn_TYPE_member_t *elm = &td->elements[edx]; |
| 428 | if(element_ptr(sptr, elm)) { |
| 429 | has_extensions = 1; |
| 430 | break; |
| 431 | } |
| 432 | } |
| 433 | ret = per_put_few_bits(&preamble, has_extensions, 1); |
| 434 | assert(ret == 0); |
| 435 | if(ret < 0) { |
| 436 | ASN__ENCODE_FAILED; |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | /* |
| 441 | * Encode optional components bitmap. |
| 442 | */ |
| 443 | if(specs->roms_count) { |
| 444 | for(edx = 0; edx < td->elements_count; edx++) { |
| 445 | asn_TYPE_member_t *elm = &td->elements[edx]; |
| 446 | |
| 447 | if(IN_EXTENSION_GROUP(specs, edx)) break; |
| 448 | |
| 449 | if(elm->optional) { |
| 450 | uint32_t has_component = (element_ptr(sptr, elm) != NULL); |
| 451 | ret = per_put_few_bits(&preamble, has_component, 1); |
| 452 | if(ret < 0) { |
| 453 | ASN__ENCODE_FAILED; |
| 454 | } |
| 455 | } |
| 456 | } |
| 457 | } |
| 458 | |
| 459 | per_put_aligned_flush(&preamble); |
| 460 | computed_size += preamble.flushed_bytes; |
| 461 | } /* if(preamble_bits) */ |
| 462 | |
| 463 | /* |
| 464 | * Put root components and extensions root. |
| 465 | */ |
| 466 | for(edx = 0; edx < td->elements_count; edx++) { |
| 467 | asn_TYPE_member_t *elm = &td->elements[edx]; |
| 468 | asn_enc_rval_t er; |
| 469 | void *memb_ptr; |
| 470 | |
| 471 | if(IN_EXTENSION_GROUP(specs, edx)) break; |
| 472 | |
| 473 | memb_ptr = element_ptr(sptr, elm); |
| 474 | if(!memb_ptr) { |
| 475 | if(elm->optional) continue; |
| 476 | /* Mandatory element is missing */ |
| 477 | ASN__ENCODE_FAILED; |
| 478 | } |
| 479 | if(!elm->type->oer_encoder) { |
| 480 | ASN_DEBUG("OER encoder is not defined for type %s", elm->type->name); |
| 481 | ASN__ENCODE_FAILED; |
| 482 | } |
| 483 | er = elm->type->oer_encoder(elm->type, elm->oer_constraints, memb_ptr, |
| 484 | cb, app_key); |
| 485 | if(er.encoded == -1) { |
| 486 | ASN_DEBUG("... while encoding %s member \"%s\"\n", td->name, |
| 487 | elm->name); |
| 488 | return er; |
| 489 | } |
| 490 | computed_size += er.encoded; |
| 491 | } |
| 492 | |
| 493 | /* |
| 494 | * Before encode extensions, encode extensions additions presense bitmap |
| 495 | # X.696 (08/2015) #16.4. |
| 496 | */ |
| 497 | if(has_extensions) { |
| 498 | asn_per_outp_t extadds; |
| 499 | |
| 500 | /* Special case allowing us to use exactly one byte for #8.6 */ |
| 501 | size_t aoms_length_bits = specs->aoms_count; |
| 502 | size_t aoms_length_bytes = (7 + specs->aoms_count) >> 3; |
| 503 | uint8_t unused_bits = 0x07 & (8 - (aoms_length_bits & 0x07)); |
| 504 | |
| 505 | assert(1 + aoms_length_bytes <= 127); |
| 506 | |
| 507 | memset(&extadds, 0, sizeof(extadds)); |
| 508 | extadds.outper = cb; |
| 509 | extadds.op_key = app_key; |
| 510 | |
| 511 | /* #8.6 length determinant */ |
| 512 | ret = per_put_few_bits(&extadds, (1 + aoms_length_bytes), 8); |
| 513 | if(ret < 0) ASN__ENCODE_FAILED; |
| 514 | |
| 515 | /* Number of unused bytes, #16.4.2 */ |
| 516 | ret = per_put_few_bits(&extadds, unused_bits, 8); |
| 517 | if(ret < 0) ASN__ENCODE_FAILED; |
| 518 | |
| 519 | /* Encode presence bitmap #16.4.3 */ |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 520 | for(edx = specs->ext_after + 1; (ssize_t)edx < specs->ext_before - 1; |
| 521 | edx++) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 522 | asn_TYPE_member_t *elm = &td->elements[edx]; |
| 523 | void *memb_ptr = element_ptr(sptr, elm); |
| 524 | ret |= per_put_few_bits(&extadds, memb_ptr ? 1 : 0, 1); |
| 525 | } |
| 526 | if(ret < 0) ASN__ENCODE_FAILED; |
| 527 | |
| 528 | per_put_aligned_flush(&extadds); |
| 529 | computed_size += extadds.flushed_bytes; |
| 530 | |
| 531 | /* Now, encode extensions */ |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 532 | for(edx = specs->ext_after + 1; (ssize_t)edx < specs->ext_before - 1; |
| 533 | edx++) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 534 | asn_TYPE_member_t *elm = &td->elements[edx]; |
| 535 | void *memb_ptr = element_ptr(sptr, elm); |
| 536 | |
| 537 | if(memb_ptr) { |
| 538 | asn_enc_rval_t er = elm->type->oer_encoder( |
| 539 | elm->type, elm->oer_constraints, memb_ptr, cb, app_key); |
| 540 | if(er.encoded == -1) { |
| 541 | return er; |
| 542 | } |
| 543 | computed_size += er.encoded; |
| 544 | } else if(!elm->optional) { |
| 545 | ASN__ENCODE_FAILED; |
| 546 | } |
| 547 | } |
| 548 | } /* if(has_extensions) */ |
| 549 | |
| 550 | |
| 551 | { |
| 552 | asn_enc_rval_t er = {0, 0, 0}; |
| 553 | er.encoded = computed_size; |
| 554 | ASN__ENCODED_OK(er); |
| 555 | } |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 556 | } |
| 557 | |
| 558 | #endif /* ASN_DISABLE_OER_SUPPORT */ |