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> |
Lev Walkin | f6853ce | 2017-08-11 00:50:27 -0700 | [diff] [blame] | 10 | #include <OPEN_TYPE.h> |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 11 | #include <errno.h> |
| 12 | |
| 13 | /* |
| 14 | * This macro "eats" the part of the buffer which is definitely "consumed", |
| 15 | * i.e. was correctly converted into local representation or rightfully skipped. |
| 16 | */ |
| 17 | #undef ADVANCE |
| 18 | #define ADVANCE(num_bytes) \ |
| 19 | do { \ |
| 20 | size_t num = num_bytes; \ |
| 21 | ptr = ((const char *)ptr) + num; \ |
| 22 | size -= num; \ |
| 23 | consumed_myself += num; \ |
| 24 | } while(0) |
| 25 | |
| 26 | /* |
| 27 | * Switch to the next phase of parsing. |
| 28 | */ |
| 29 | #undef NEXT_PHASE |
| 30 | #undef PHASE_OUT |
| 31 | #define NEXT_PHASE(ctx) \ |
| 32 | do { \ |
| 33 | ctx->phase++; \ |
| 34 | ctx->step = 0; \ |
| 35 | } while(0) |
| 36 | |
| 37 | /* |
| 38 | * Check whether we are inside the extensions group. |
| 39 | */ |
| 40 | #define IN_EXTENSION_GROUP(specs, memb_idx) \ |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 41 | ( (((ssize_t)(memb_idx)) > (specs)->ext_after) \ |
| 42 | &&(((ssize_t)(memb_idx)) < (specs)->ext_before)) |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 43 | |
| 44 | /* |
| 45 | * Return a standardized complex structure. |
| 46 | */ |
| 47 | #undef RETURN |
| 48 | #define RETURN(_code) do { \ |
| 49 | rval.code = _code; \ |
| 50 | rval.consumed = consumed_myself;\ |
| 51 | return rval; \ |
| 52 | } while(0) |
| 53 | |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 54 | /* |
| 55 | * Return pointer to a member. |
| 56 | */ |
Lev Walkin | cfc16d3 | 2017-08-30 19:15:08 -0700 | [diff] [blame] | 57 | static void ** |
| 58 | element_ptrptr(void *struct_ptr, asn_TYPE_member_t *elm, void **tmp_save_ptr) { |
| 59 | if(elm->flags & ATF_POINTER) { |
| 60 | /* Member is a pointer to another structure */ |
| 61 | return (void **)((char *)struct_ptr + elm->memb_offset); |
| 62 | } else { |
| 63 | assert(tmp_save_ptr); |
| 64 | *tmp_save_ptr = (void *)((char *)struct_ptr + elm->memb_offset); |
| 65 | return tmp_save_ptr; |
| 66 | } |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 67 | } |
| 68 | |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 69 | static const void * |
| 70 | element_ptr(const void *struct_ptr, const asn_TYPE_member_t *elm) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 71 | if(elm->flags & ATF_POINTER) { |
| 72 | /* Member is a pointer to another structure */ |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 73 | return *(const void *const *)((const char *)struct_ptr |
| 74 | + elm->memb_offset); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 75 | } else { |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 76 | return (const void *)((const char *)struct_ptr + elm->memb_offset); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 77 | } |
| 78 | } |
| 79 | |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 80 | asn_dec_rval_t |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 81 | SEQUENCE_decode_oer(const asn_codec_ctx_t *opt_codec_ctx, |
| 82 | const asn_TYPE_descriptor_t *td, |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 83 | const asn_oer_constraints_t *constraints, void **struct_ptr, |
| 84 | const void *ptr, size_t size) { |
Lev Walkin | d84f603 | 2017-10-03 16:33:59 -0700 | [diff] [blame] | 85 | const asn_SEQUENCE_specifics_t *specs = |
| 86 | (const asn_SEQUENCE_specifics_t *)td->specifics; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 87 | asn_dec_rval_t rval = {RC_OK, 0}; |
| 88 | void *st = *struct_ptr; /* Target structure */ |
| 89 | asn_struct_ctx_t *ctx; /* Decoder context */ |
| 90 | size_t consumed_myself = 0; /* Consumed bytes from ptr. */ |
| 91 | |
| 92 | |
| 93 | (void)opt_codec_ctx; |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 94 | (void)constraints; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 95 | |
| 96 | /* |
| 97 | * Create the target structure if it is not present already. |
| 98 | */ |
| 99 | if(st == 0) { |
| 100 | st = *struct_ptr = CALLOC(1, specs->struct_size); |
| 101 | if(st == 0) { |
| 102 | RETURN(RC_FAIL); |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | /* |
| 107 | * Restore parsing context. |
| 108 | */ |
| 109 | ctx = (asn_struct_ctx_t *)((char *)st + specs->ctx_offset); |
| 110 | if(ctx->ptr == 0) { |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 111 | ctx->ptr = CALLOC(1, sizeof(asn_bit_data_t)); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 112 | if(!ctx->ptr) { |
| 113 | RETURN(RC_FAIL); |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | /* |
| 118 | * Start to parse where left previously. |
| 119 | */ |
| 120 | switch(ctx->phase) { |
| 121 | case 0: { |
| 122 | /* |
| 123 | * Fetch preamble. |
| 124 | */ |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 125 | asn_bit_data_t *preamble = ctx->ptr; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 126 | int has_extensions_bit = (specs->ext_before >= 0); |
| 127 | size_t preamble_bits = (has_extensions_bit + specs->roms_count); |
| 128 | size_t preamble_bytes = ((7 + preamble_bits) >> 3); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 129 | uint8_t *pbytes; |
| 130 | |
Lev Walkin | bc0b0c5 | 2017-08-02 14:02:48 -0700 | [diff] [blame] | 131 | ASN_DEBUG("OER SEQUENCE %s Decoding PHASE 0", td->name); |
| 132 | |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 133 | ASN_DEBUG( |
| 134 | "Expecting preamble bits %zu for %s (including %d extension bits)", |
| 135 | preamble_bits, td->name, has_extensions_bit); |
| 136 | |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 137 | if(size < preamble_bytes) { |
| 138 | ASN__DECODE_STARVED; |
| 139 | } |
| 140 | |
| 141 | pbytes = MALLOC(preamble_bytes + 1); |
| 142 | if(!pbytes) { |
| 143 | RETURN(RC_FAIL); |
| 144 | } |
| 145 | preamble->buffer = (const void *)pbytes; |
| 146 | memcpy(pbytes, ptr, preamble_bytes); |
| 147 | pbytes[preamble_bytes] = '\0'; /* Just in case */ |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 148 | preamble->nboff = has_extensions_bit; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 149 | preamble->nbits = preamble_bits; |
| 150 | ADVANCE(preamble_bytes); |
| 151 | } |
| 152 | NEXT_PHASE(ctx); |
| 153 | /* FALL THROUGH */ |
| 154 | case 1: { |
| 155 | /* Decode components of the extension root */ |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 156 | asn_bit_data_t *preamble = ctx->ptr; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 157 | size_t edx; |
| 158 | |
Lev Walkin | bc0b0c5 | 2017-08-02 14:02:48 -0700 | [diff] [blame] | 159 | ASN_DEBUG("OER SEQUENCE %s Decoding PHASE 1", td->name); |
| 160 | |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 161 | for(edx = (ctx->step >> 1); edx < td->elements_count; |
| 162 | edx++, ctx->step = (ctx->step & ~1) + 2) { |
| 163 | asn_TYPE_member_t *elm = &td->elements[edx]; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 164 | |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 165 | ASN_DEBUG("Decoding %s->%s", td->name, elm->name); |
| 166 | |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 167 | if(ctx->step & 1) { |
| 168 | goto microphase2_decode_continues; |
| 169 | } |
| 170 | |
| 171 | |
| 172 | if(IN_EXTENSION_GROUP(specs, edx)) { |
| 173 | /* Ignore non-root components in PHASE 1 */ |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 174 | break; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 175 | } |
| 176 | |
| 177 | if(elm->optional) { |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 178 | int32_t present = asn_get_few_bits(preamble, 1); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 179 | if(present < 0) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 180 | ASN_DEBUG("Presence map ended prematurely: %d", present); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 181 | RETURN(RC_FAIL); |
| 182 | } else if(present == 0) { |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 183 | if(elm->default_value_set) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 184 | /* Fill-in DEFAULT */ |
Lev Walkin | cfc16d3 | 2017-08-30 19:15:08 -0700 | [diff] [blame] | 185 | void *tmp; |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 186 | if(elm->default_value_set( |
| 187 | element_ptrptr(st, elm, &tmp))) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 188 | RETURN(RC_FAIL); |
| 189 | } |
| 190 | } |
| 191 | /* The member is not present. */ |
| 192 | continue; |
| 193 | } |
| 194 | /* Present OPTIONAL or DEFAULT component. */ |
| 195 | } |
| 196 | |
| 197 | /* |
| 198 | * MICROPHASE 2: Invoke the member-specific decoder. |
| 199 | */ |
| 200 | ctx->step |= 1; /* Confirm entering next microphase */ |
| 201 | microphase2_decode_continues: |
Lev Walkin | 14fd3e5 | 2017-08-27 01:38:45 -0700 | [diff] [blame] | 202 | if(elm->flags & ATF_OPEN_TYPE) { |
Lev Walkin | f6853ce | 2017-08-11 00:50:27 -0700 | [diff] [blame] | 203 | rval = OPEN_TYPE_oer_get(opt_codec_ctx, td, st, elm, ptr, size); |
Lev Walkin | 7c87630 | 2017-08-10 06:11:24 -0700 | [diff] [blame] | 204 | } else { |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 205 | void *save_memb_ptr; /* Temporary reference. */ |
Lev Walkin | f6853ce | 2017-08-11 00:50:27 -0700 | [diff] [blame] | 206 | void **memb_ptr2; /* Pointer to a pointer to a memmber */ |
| 207 | |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 208 | memb_ptr2 = element_ptrptr(st, elm, &save_memb_ptr); |
Lev Walkin | f6853ce | 2017-08-11 00:50:27 -0700 | [diff] [blame] | 209 | |
Bi-Ruei, Chiu | 1f87ac0 | 2017-08-20 01:25:45 +0800 | [diff] [blame] | 210 | rval = elm->type->op->oer_decoder(opt_codec_ctx, elm->type, |
Lev Walkin | a5972be | 2017-09-29 23:15:58 -0700 | [diff] [blame] | 211 | elm->encoding_constraints.oer_constraints, |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 212 | memb_ptr2, ptr, size); |
Lev Walkin | 7c87630 | 2017-08-10 06:11:24 -0700 | [diff] [blame] | 213 | } |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 214 | switch(rval.code) { |
| 215 | case RC_OK: |
| 216 | ADVANCE(rval.consumed); |
| 217 | break; |
| 218 | case RC_WMORE: |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 219 | ASN_DEBUG("More bytes needed at element %s \"%s\"", td->name, |
| 220 | elm->name); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 221 | ADVANCE(rval.consumed); |
| 222 | RETURN(RC_WMORE); |
| 223 | case RC_FAIL: |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 224 | ASN_DEBUG("Decoding failed at element %s \"%s\"", td->name, |
| 225 | elm->name); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 226 | RETURN(RC_FAIL); |
| 227 | } |
| 228 | } /* for(all root members) */ |
| 229 | |
| 230 | } |
| 231 | NEXT_PHASE(ctx); |
| 232 | /* FALL THROUGH */ |
| 233 | case 2: { |
| 234 | /* Cleanup preamble. */ |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 235 | asn_bit_data_t *preamble = ctx->ptr; |
| 236 | asn_bit_data_t *extadds; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 237 | int has_extensions_bit = (specs->ext_before >= 0); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 238 | int extensions_present = |
Lev Walkin | 1a50389 | 2017-08-31 02:15:11 -0700 | [diff] [blame] | 239 | has_extensions_bit |
| 240 | && (preamble->buffer == NULL |
| 241 | || (((const uint8_t *)preamble->buffer)[0] & 0x80)); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 242 | uint8_t unused_bits; |
| 243 | size_t len = 0; |
| 244 | ssize_t len_len; |
| 245 | uint8_t *ebytes; |
| 246 | |
| 247 | union { |
| 248 | const uint8_t *cptr; |
| 249 | uint8_t *uptr; |
| 250 | } unconst; |
Lev Walkin | bc0b0c5 | 2017-08-02 14:02:48 -0700 | [diff] [blame] | 251 | |
| 252 | ASN_DEBUG("OER SEQUENCE %s Decoding PHASE 2", td->name); |
| 253 | |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 254 | unconst.cptr = preamble->buffer; |
| 255 | FREEMEM(unconst.uptr); |
Lev Walkin | 1a50389 | 2017-08-31 02:15:11 -0700 | [diff] [blame] | 256 | preamble->buffer = 0; /* Will do extensions_present==1 next time. */ |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 257 | |
| 258 | if(!extensions_present) { |
| 259 | ctx->phase = 10; |
| 260 | RETURN(RC_OK); |
| 261 | } |
| 262 | |
| 263 | /* |
| 264 | * X.696 (08/2015) #16.1 (c), #16.4 |
| 265 | * Read in the extension addition presence bitmap. |
| 266 | */ |
| 267 | |
| 268 | len_len = oer_fetch_length(ptr, size, &len); |
| 269 | if(len_len > 0) { |
| 270 | ADVANCE(len_len); |
| 271 | } if(len_len < 0) { |
| 272 | RETURN(RC_FAIL); |
| 273 | } else { |
| 274 | RETURN(RC_WMORE); |
| 275 | } |
| 276 | |
| 277 | if(len == 0) { |
| 278 | /* 16.4.1-2 */ |
| 279 | RETURN(RC_FAIL); |
| 280 | } else if(len > size) { |
| 281 | RETURN(RC_WMORE); |
| 282 | } |
| 283 | |
| 284 | /* Account for unused bits */ |
| 285 | unused_bits = 0x7 & *(const uint8_t *)ptr; |
| 286 | ADVANCE(1); |
| 287 | len--; |
| 288 | if(unused_bits && len == 0) { |
| 289 | RETURN(RC_FAIL); |
| 290 | } |
| 291 | |
| 292 | /* Get the extensions map */ |
| 293 | ebytes = MALLOC(len + 1); |
| 294 | if(!ebytes) { |
| 295 | RETURN(RC_FAIL); |
| 296 | } |
| 297 | memcpy(ebytes, ptr, len); |
| 298 | ebytes[len] = '\0'; |
| 299 | |
| 300 | extadds = preamble; |
| 301 | memset(extadds, 0, sizeof(*extadds)); |
| 302 | extadds->buffer = ebytes; |
| 303 | extadds->nboff = 0; |
| 304 | extadds->nbits = 8 * len - unused_bits; |
| 305 | |
| 306 | ADVANCE(len); |
| 307 | } |
| 308 | NEXT_PHASE(ctx); |
| 309 | ctx->step = (specs->ext_after + 1); |
| 310 | /* Fall through */ |
| 311 | case 3: |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 312 | ASN_DEBUG("OER SEQUENCE %s Decoding PHASE 3", td->name); |
| 313 | for(; ctx->step < specs->ext_before - 1; ctx->step++) { |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 314 | asn_bit_data_t *extadds = ctx->ptr; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 315 | size_t edx = ctx->step; |
| 316 | asn_TYPE_member_t *elm = &td->elements[edx]; |
Lev Walkin | cfc16d3 | 2017-08-30 19:15:08 -0700 | [diff] [blame] | 317 | void **memb_ptr2 = element_ptrptr(st, elm, 0); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 318 | |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 319 | switch(asn_get_few_bits(extadds, 1)) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 320 | case -1: |
| 321 | /* |
| 322 | * Not every one of our extensions is known to the remote side. |
| 323 | * Continue filling in their defaults though. |
| 324 | */ |
| 325 | /* Fall through */ |
| 326 | case 0: |
| 327 | /* Fill-in DEFAULT */ |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 328 | if(elm->default_value_set |
| 329 | && elm->default_value_set(memb_ptr2)) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 330 | RETURN(RC_FAIL); |
| 331 | } |
| 332 | continue; |
| 333 | case 1: { |
| 334 | /* Read OER open type */ |
| 335 | ssize_t ot_size = oer_open_type_get(opt_codec_ctx, elm->type, |
Lev Walkin | a5972be | 2017-09-29 23:15:58 -0700 | [diff] [blame] | 336 | elm->encoding_constraints.oer_constraints, |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 337 | memb_ptr2, ptr, size); |
| 338 | if(ot_size > 0) { |
| 339 | ADVANCE(ot_size); |
| 340 | } else if(ot_size < 0) { |
| 341 | RETURN(RC_FAIL); |
| 342 | } else { |
| 343 | /* Roll back open type parsing */ |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 344 | asn_get_undo(extadds, 1); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 345 | ASN_STRUCT_FREE(*elm->type, *memb_ptr2); |
| 346 | *memb_ptr2 = NULL; |
| 347 | RETURN(RC_WMORE); |
| 348 | } |
| 349 | break; |
| 350 | } |
| 351 | default: |
| 352 | RETURN(RC_FAIL); |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | NEXT_PHASE(ctx); |
| 357 | /* Fall through */ |
| 358 | case 4: |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 359 | ASN_DEBUG("OER SEQUENCE %s Decoding PHASE 4", td->name); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 360 | /* Read in the rest of Open Types while ignoring them */ |
| 361 | for(;;) { |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 362 | asn_bit_data_t *extadds = ctx->ptr; |
| 363 | switch(asn_get_few_bits(extadds, 1)) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 364 | case 0: |
| 365 | continue; |
| 366 | case 1: { |
Lev Walkin | 51a1f3f | 2017-07-20 14:52:25 +0300 | [diff] [blame] | 367 | ssize_t skipped = oer_open_type_skip(ptr, size); |
| 368 | if(skipped > 0) { |
| 369 | ADVANCE(skipped); |
| 370 | } else if(skipped < 0) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 371 | RETURN(RC_FAIL); |
| 372 | } else { |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 373 | asn_get_undo(extadds, 1); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 374 | RETURN(RC_WMORE); |
| 375 | } |
| 376 | continue; |
| 377 | } |
| 378 | case -1: |
| 379 | /* No more Open Type encoded components */ |
| 380 | break; |
| 381 | default: |
| 382 | RETURN(RC_FAIL); |
| 383 | } |
| 384 | break; |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | return rval; |
| 389 | } |
| 390 | |
| 391 | /* |
| 392 | * Encode as Canonical OER. |
| 393 | */ |
| 394 | asn_enc_rval_t |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 395 | SEQUENCE_encode_oer(const asn_TYPE_descriptor_t *td, |
| 396 | const asn_oer_constraints_t *constraints, const void *sptr, |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 397 | asn_app_consume_bytes_f *cb, void *app_key) { |
Lev Walkin | d84f603 | 2017-10-03 16:33:59 -0700 | [diff] [blame] | 398 | const asn_SEQUENCE_specifics_t *specs = (const asn_SEQUENCE_specifics_t *)td->specifics; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 399 | size_t computed_size = 0; |
| 400 | int has_extensions_bit = (specs->ext_before >= 0); |
| 401 | size_t preamble_bits = (has_extensions_bit + specs->roms_count); |
| 402 | uint32_t has_extensions = 0; |
| 403 | size_t edx; |
| 404 | int ret; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 405 | |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 406 | (void)constraints; |
| 407 | |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 408 | if(preamble_bits) { |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 409 | asn_bit_outp_t preamble; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 410 | |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 411 | memset(&preamble, 0, sizeof(preamble)); |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 412 | preamble.output = cb; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 413 | preamble.op_key = app_key; |
| 414 | |
| 415 | if(has_extensions_bit) { |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 416 | for(edx = specs->ext_after + 1; |
| 417 | (ssize_t)edx < specs->ext_before - 1; edx++) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 418 | asn_TYPE_member_t *elm = &td->elements[edx]; |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 419 | const void *memb_ptr = element_ptr(sptr, elm); |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 420 | if(memb_ptr) { |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 421 | if(elm->default_value_cmp |
| 422 | && elm->default_value_cmp(memb_ptr) == 0) { |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 423 | /* Do not encode default values in extensions */ |
| 424 | } else { |
| 425 | has_extensions = 1; |
| 426 | break; |
| 427 | } |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 428 | } |
| 429 | } |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 430 | ret = asn_put_few_bits(&preamble, has_extensions, 1); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 431 | assert(ret == 0); |
| 432 | if(ret < 0) { |
| 433 | ASN__ENCODE_FAILED; |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | /* |
| 438 | * Encode optional components bitmap. |
| 439 | */ |
| 440 | if(specs->roms_count) { |
| 441 | for(edx = 0; edx < td->elements_count; edx++) { |
| 442 | asn_TYPE_member_t *elm = &td->elements[edx]; |
| 443 | |
| 444 | if(IN_EXTENSION_GROUP(specs, edx)) break; |
| 445 | |
| 446 | if(elm->optional) { |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 447 | const void *memb_ptr = element_ptr(sptr, elm); |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 448 | uint32_t has_component = memb_ptr != NULL; |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 449 | if(has_component && elm->default_value_cmp |
| 450 | && elm->default_value_cmp(&memb_ptr) == 0) { |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 451 | has_component = 0; |
| 452 | } |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 453 | ret = asn_put_few_bits(&preamble, has_component, 1); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 454 | if(ret < 0) { |
| 455 | ASN__ENCODE_FAILED; |
| 456 | } |
| 457 | } |
| 458 | } |
| 459 | } |
| 460 | |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 461 | asn_put_aligned_flush(&preamble); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 462 | computed_size += preamble.flushed_bytes; |
| 463 | } /* if(preamble_bits) */ |
| 464 | |
| 465 | /* |
| 466 | * Put root components and extensions root. |
| 467 | */ |
| 468 | for(edx = 0; edx < td->elements_count; edx++) { |
| 469 | asn_TYPE_member_t *elm = &td->elements[edx]; |
| 470 | asn_enc_rval_t er; |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 471 | const void *memb_ptr; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 472 | |
| 473 | if(IN_EXTENSION_GROUP(specs, edx)) break; |
| 474 | |
| 475 | memb_ptr = element_ptr(sptr, elm); |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 476 | if(memb_ptr) { |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 477 | if(elm->default_value_cmp |
| 478 | && elm->default_value_cmp(memb_ptr) == 0) { |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 479 | /* Skip default values in encoding */ |
| 480 | continue; |
| 481 | } |
| 482 | } else { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 483 | if(elm->optional) continue; |
| 484 | /* Mandatory element is missing */ |
| 485 | ASN__ENCODE_FAILED; |
| 486 | } |
Bi-Ruei, Chiu | 1f87ac0 | 2017-08-20 01:25:45 +0800 | [diff] [blame] | 487 | if(!elm->type->op->oer_encoder) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 488 | ASN_DEBUG("OER encoder is not defined for type %s", elm->type->name); |
| 489 | ASN__ENCODE_FAILED; |
| 490 | } |
Lev Walkin | a5972be | 2017-09-29 23:15:58 -0700 | [diff] [blame] | 491 | er = elm->type->op->oer_encoder( |
| 492 | elm->type, elm->encoding_constraints.oer_constraints, memb_ptr, cb, |
| 493 | app_key); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 494 | if(er.encoded == -1) { |
| 495 | ASN_DEBUG("... while encoding %s member \"%s\"\n", td->name, |
| 496 | elm->name); |
| 497 | return er; |
| 498 | } |
| 499 | computed_size += er.encoded; |
| 500 | } |
| 501 | |
| 502 | /* |
| 503 | * Before encode extensions, encode extensions additions presense bitmap |
| 504 | # X.696 (08/2015) #16.4. |
| 505 | */ |
| 506 | if(has_extensions) { |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 507 | asn_bit_outp_t extadds; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 508 | |
| 509 | /* Special case allowing us to use exactly one byte for #8.6 */ |
| 510 | size_t aoms_length_bits = specs->aoms_count; |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 511 | size_t aoms_length_bytes = (7 + aoms_length_bits) >> 3; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 512 | uint8_t unused_bits = 0x07 & (8 - (aoms_length_bits & 0x07)); |
| 513 | |
| 514 | assert(1 + aoms_length_bytes <= 127); |
| 515 | |
| 516 | memset(&extadds, 0, sizeof(extadds)); |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 517 | extadds.output = cb; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 518 | extadds.op_key = app_key; |
| 519 | |
| 520 | /* #8.6 length determinant */ |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 521 | ret = asn_put_few_bits(&extadds, (1 + aoms_length_bytes), 8); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 522 | if(ret < 0) ASN__ENCODE_FAILED; |
| 523 | |
| 524 | /* Number of unused bytes, #16.4.2 */ |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 525 | ret = asn_put_few_bits(&extadds, unused_bits, 8); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 526 | if(ret < 0) ASN__ENCODE_FAILED; |
| 527 | |
| 528 | /* Encode presence bitmap #16.4.3 */ |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 529 | for(edx = specs->ext_after + 1; (ssize_t)edx < specs->ext_before - 1; |
| 530 | edx++) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 531 | asn_TYPE_member_t *elm = &td->elements[edx]; |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 532 | const void *memb_ptr = element_ptr(sptr, elm); |
| 533 | if(memb_ptr && elm->default_value_cmp |
| 534 | && elm->default_value_cmp(memb_ptr) == 0) { |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 535 | memb_ptr = 0; /* Do not encode default value. */ |
| 536 | } |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 537 | ret |= asn_put_few_bits(&extadds, memb_ptr ? 1 : 0, 1); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 538 | } |
| 539 | if(ret < 0) ASN__ENCODE_FAILED; |
| 540 | |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 541 | asn_put_aligned_flush(&extadds); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 542 | computed_size += extadds.flushed_bytes; |
| 543 | |
| 544 | /* Now, encode extensions */ |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 545 | for(edx = specs->ext_after + 1; (ssize_t)edx < specs->ext_before - 1; |
| 546 | edx++) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 547 | asn_TYPE_member_t *elm = &td->elements[edx]; |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 548 | const void *memb_ptr = element_ptr(sptr, elm); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 549 | |
| 550 | if(memb_ptr) { |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 551 | if(elm->default_value_cmp |
| 552 | && elm->default_value_cmp(memb_ptr) == 0) { |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 553 | /* Do not encode default value. */ |
| 554 | } else { |
| 555 | asn_enc_rval_t er = elm->type->op->oer_encoder( |
Lev Walkin | a5972be | 2017-09-29 23:15:58 -0700 | [diff] [blame] | 556 | elm->type, elm->encoding_constraints.oer_constraints, |
| 557 | memb_ptr, cb, app_key); |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 558 | if(er.encoded == -1) { |
| 559 | return er; |
| 560 | } |
| 561 | computed_size += er.encoded; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 562 | } |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 563 | } else if(!elm->optional) { |
| 564 | ASN__ENCODE_FAILED; |
| 565 | } |
| 566 | } |
| 567 | } /* if(has_extensions) */ |
| 568 | |
| 569 | |
| 570 | { |
| 571 | asn_enc_rval_t er = {0, 0, 0}; |
| 572 | er.encoded = computed_size; |
| 573 | ASN__ENCODED_OK(er); |
| 574 | } |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 575 | } |
| 576 | |
| 577 | #endif /* ASN_DISABLE_OER_SUPPORT */ |