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 | |
Lev Walkin | 42f6c88 | 2017-10-20 02:39:08 -0700 | [diff] [blame] | 210 | rval = elm->type->op->oer_decoder( |
| 211 | opt_codec_ctx, elm->type, |
| 212 | elm->encoding_constraints.oer_constraints, memb_ptr2, ptr, |
| 213 | size); |
Lev Walkin | 7c87630 | 2017-08-10 06:11:24 -0700 | [diff] [blame] | 214 | } |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 215 | switch(rval.code) { |
| 216 | case RC_OK: |
| 217 | ADVANCE(rval.consumed); |
| 218 | break; |
| 219 | case RC_WMORE: |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 220 | ASN_DEBUG("More bytes needed at element %s \"%s\"", td->name, |
| 221 | elm->name); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 222 | ADVANCE(rval.consumed); |
| 223 | RETURN(RC_WMORE); |
| 224 | case RC_FAIL: |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 225 | ASN_DEBUG("Decoding failed at element %s \"%s\"", td->name, |
| 226 | elm->name); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 227 | RETURN(RC_FAIL); |
| 228 | } |
| 229 | } /* for(all root members) */ |
| 230 | |
| 231 | } |
| 232 | NEXT_PHASE(ctx); |
| 233 | /* FALL THROUGH */ |
| 234 | case 2: { |
| 235 | /* Cleanup preamble. */ |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 236 | asn_bit_data_t *preamble = ctx->ptr; |
| 237 | asn_bit_data_t *extadds; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 238 | int has_extensions_bit = (specs->ext_before >= 0); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 239 | int extensions_present = |
Lev Walkin | 1a50389 | 2017-08-31 02:15:11 -0700 | [diff] [blame] | 240 | has_extensions_bit |
| 241 | && (preamble->buffer == NULL |
| 242 | || (((const uint8_t *)preamble->buffer)[0] & 0x80)); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 243 | uint8_t unused_bits; |
| 244 | size_t len = 0; |
| 245 | ssize_t len_len; |
| 246 | uint8_t *ebytes; |
| 247 | |
| 248 | union { |
| 249 | const uint8_t *cptr; |
| 250 | uint8_t *uptr; |
| 251 | } unconst; |
Lev Walkin | bc0b0c5 | 2017-08-02 14:02:48 -0700 | [diff] [blame] | 252 | |
| 253 | ASN_DEBUG("OER SEQUENCE %s Decoding PHASE 2", td->name); |
| 254 | |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 255 | unconst.cptr = preamble->buffer; |
| 256 | FREEMEM(unconst.uptr); |
Lev Walkin | 1a50389 | 2017-08-31 02:15:11 -0700 | [diff] [blame] | 257 | preamble->buffer = 0; /* Will do extensions_present==1 next time. */ |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 258 | |
| 259 | if(!extensions_present) { |
| 260 | ctx->phase = 10; |
| 261 | RETURN(RC_OK); |
| 262 | } |
| 263 | |
| 264 | /* |
| 265 | * X.696 (08/2015) #16.1 (c), #16.4 |
| 266 | * Read in the extension addition presence bitmap. |
| 267 | */ |
| 268 | |
| 269 | len_len = oer_fetch_length(ptr, size, &len); |
| 270 | if(len_len > 0) { |
| 271 | ADVANCE(len_len); |
Lev Walkin | 42f6c88 | 2017-10-20 02:39:08 -0700 | [diff] [blame] | 272 | } else if(len_len < 0) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 273 | RETURN(RC_FAIL); |
| 274 | } else { |
| 275 | RETURN(RC_WMORE); |
| 276 | } |
| 277 | |
| 278 | if(len == 0) { |
| 279 | /* 16.4.1-2 */ |
| 280 | RETURN(RC_FAIL); |
| 281 | } else if(len > size) { |
| 282 | RETURN(RC_WMORE); |
| 283 | } |
| 284 | |
| 285 | /* Account for unused bits */ |
| 286 | unused_bits = 0x7 & *(const uint8_t *)ptr; |
| 287 | ADVANCE(1); |
| 288 | len--; |
| 289 | if(unused_bits && len == 0) { |
| 290 | RETURN(RC_FAIL); |
| 291 | } |
| 292 | |
| 293 | /* Get the extensions map */ |
| 294 | ebytes = MALLOC(len + 1); |
| 295 | if(!ebytes) { |
| 296 | RETURN(RC_FAIL); |
| 297 | } |
| 298 | memcpy(ebytes, ptr, len); |
| 299 | ebytes[len] = '\0'; |
| 300 | |
| 301 | extadds = preamble; |
| 302 | memset(extadds, 0, sizeof(*extadds)); |
| 303 | extadds->buffer = ebytes; |
| 304 | extadds->nboff = 0; |
| 305 | extadds->nbits = 8 * len - unused_bits; |
| 306 | |
| 307 | ADVANCE(len); |
| 308 | } |
| 309 | NEXT_PHASE(ctx); |
| 310 | ctx->step = (specs->ext_after + 1); |
| 311 | /* Fall through */ |
| 312 | case 3: |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 313 | ASN_DEBUG("OER SEQUENCE %s Decoding PHASE 3", td->name); |
| 314 | for(; ctx->step < specs->ext_before - 1; ctx->step++) { |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 315 | asn_bit_data_t *extadds = ctx->ptr; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 316 | size_t edx = ctx->step; |
| 317 | asn_TYPE_member_t *elm = &td->elements[edx]; |
Lev Walkin | 42f6c88 | 2017-10-20 02:39:08 -0700 | [diff] [blame] | 318 | void *tmp_memb_ptr; |
| 319 | void **memb_ptr2 = element_ptrptr(st, elm, &tmp_memb_ptr); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 320 | |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 321 | switch(asn_get_few_bits(extadds, 1)) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 322 | case -1: |
| 323 | /* |
| 324 | * Not every one of our extensions is known to the remote side. |
| 325 | * Continue filling in their defaults though. |
| 326 | */ |
| 327 | /* Fall through */ |
| 328 | case 0: |
| 329 | /* Fill-in DEFAULT */ |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 330 | if(elm->default_value_set |
| 331 | && elm->default_value_set(memb_ptr2)) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 332 | RETURN(RC_FAIL); |
| 333 | } |
| 334 | continue; |
| 335 | case 1: { |
| 336 | /* Read OER open type */ |
Lev Walkin | 42f6c88 | 2017-10-20 02:39:08 -0700 | [diff] [blame] | 337 | ssize_t ot_size = |
| 338 | oer_open_type_get(opt_codec_ctx, elm->type, |
| 339 | elm->encoding_constraints.oer_constraints, |
| 340 | memb_ptr2, ptr, size); |
| 341 | assert(ot_size <= (ssize_t)size); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 342 | if(ot_size > 0) { |
| 343 | ADVANCE(ot_size); |
| 344 | } else if(ot_size < 0) { |
| 345 | RETURN(RC_FAIL); |
| 346 | } else { |
| 347 | /* Roll back open type parsing */ |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 348 | asn_get_undo(extadds, 1); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 349 | RETURN(RC_WMORE); |
| 350 | } |
| 351 | break; |
| 352 | } |
| 353 | default: |
| 354 | RETURN(RC_FAIL); |
| 355 | } |
| 356 | } |
| 357 | |
| 358 | NEXT_PHASE(ctx); |
| 359 | /* Fall through */ |
| 360 | case 4: |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 361 | ASN_DEBUG("OER SEQUENCE %s Decoding PHASE 4", td->name); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 362 | /* Read in the rest of Open Types while ignoring them */ |
| 363 | for(;;) { |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 364 | asn_bit_data_t *extadds = ctx->ptr; |
| 365 | switch(asn_get_few_bits(extadds, 1)) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 366 | case 0: |
| 367 | continue; |
| 368 | case 1: { |
Lev Walkin | 51a1f3f | 2017-07-20 14:52:25 +0300 | [diff] [blame] | 369 | ssize_t skipped = oer_open_type_skip(ptr, size); |
| 370 | if(skipped > 0) { |
| 371 | ADVANCE(skipped); |
| 372 | } else if(skipped < 0) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 373 | RETURN(RC_FAIL); |
| 374 | } else { |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 375 | asn_get_undo(extadds, 1); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 376 | RETURN(RC_WMORE); |
| 377 | } |
| 378 | continue; |
| 379 | } |
| 380 | case -1: |
| 381 | /* No more Open Type encoded components */ |
| 382 | break; |
| 383 | default: |
| 384 | RETURN(RC_FAIL); |
| 385 | } |
| 386 | break; |
| 387 | } |
| 388 | } |
| 389 | |
Lev Walkin | 42f6c88 | 2017-10-20 02:39:08 -0700 | [diff] [blame] | 390 | RETURN(RC_OK); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 391 | } |
| 392 | |
| 393 | /* |
| 394 | * Encode as Canonical OER. |
| 395 | */ |
| 396 | asn_enc_rval_t |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 397 | SEQUENCE_encode_oer(const asn_TYPE_descriptor_t *td, |
| 398 | const asn_oer_constraints_t *constraints, const void *sptr, |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 399 | asn_app_consume_bytes_f *cb, void *app_key) { |
Lev Walkin | d84f603 | 2017-10-03 16:33:59 -0700 | [diff] [blame] | 400 | 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] | 401 | size_t computed_size = 0; |
| 402 | int has_extensions_bit = (specs->ext_before >= 0); |
| 403 | size_t preamble_bits = (has_extensions_bit + specs->roms_count); |
| 404 | uint32_t has_extensions = 0; |
| 405 | size_t edx; |
| 406 | int ret; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 407 | |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 408 | (void)constraints; |
| 409 | |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 410 | if(preamble_bits) { |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 411 | asn_bit_outp_t preamble; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 412 | |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 413 | memset(&preamble, 0, sizeof(preamble)); |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 414 | preamble.output = cb; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 415 | preamble.op_key = app_key; |
| 416 | |
| 417 | if(has_extensions_bit) { |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 418 | for(edx = specs->ext_after + 1; |
| 419 | (ssize_t)edx < specs->ext_before - 1; edx++) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 420 | asn_TYPE_member_t *elm = &td->elements[edx]; |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 421 | const void *memb_ptr = element_ptr(sptr, elm); |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 422 | if(memb_ptr) { |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 423 | if(elm->default_value_cmp |
| 424 | && elm->default_value_cmp(memb_ptr) == 0) { |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 425 | /* Do not encode default values in extensions */ |
| 426 | } else { |
| 427 | has_extensions = 1; |
| 428 | break; |
| 429 | } |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 430 | } |
| 431 | } |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 432 | ret = asn_put_few_bits(&preamble, has_extensions, 1); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 433 | assert(ret == 0); |
| 434 | if(ret < 0) { |
| 435 | ASN__ENCODE_FAILED; |
| 436 | } |
| 437 | } |
| 438 | |
| 439 | /* |
| 440 | * Encode optional components bitmap. |
| 441 | */ |
| 442 | if(specs->roms_count) { |
| 443 | for(edx = 0; edx < td->elements_count; edx++) { |
| 444 | asn_TYPE_member_t *elm = &td->elements[edx]; |
| 445 | |
| 446 | if(IN_EXTENSION_GROUP(specs, edx)) break; |
| 447 | |
| 448 | if(elm->optional) { |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 449 | const void *memb_ptr = element_ptr(sptr, elm); |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 450 | uint32_t has_component = memb_ptr != NULL; |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 451 | if(has_component && elm->default_value_cmp |
| 452 | && elm->default_value_cmp(&memb_ptr) == 0) { |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 453 | has_component = 0; |
| 454 | } |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 455 | ret = asn_put_few_bits(&preamble, has_component, 1); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 456 | if(ret < 0) { |
| 457 | ASN__ENCODE_FAILED; |
| 458 | } |
| 459 | } |
| 460 | } |
| 461 | } |
| 462 | |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 463 | asn_put_aligned_flush(&preamble); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 464 | computed_size += preamble.flushed_bytes; |
| 465 | } /* if(preamble_bits) */ |
| 466 | |
| 467 | /* |
| 468 | * Put root components and extensions root. |
| 469 | */ |
| 470 | for(edx = 0; edx < td->elements_count; edx++) { |
| 471 | asn_TYPE_member_t *elm = &td->elements[edx]; |
| 472 | asn_enc_rval_t er; |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 473 | const void *memb_ptr; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 474 | |
| 475 | if(IN_EXTENSION_GROUP(specs, edx)) break; |
| 476 | |
| 477 | memb_ptr = element_ptr(sptr, elm); |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 478 | if(memb_ptr) { |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 479 | if(elm->default_value_cmp |
| 480 | && elm->default_value_cmp(memb_ptr) == 0) { |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 481 | /* Skip default values in encoding */ |
| 482 | continue; |
| 483 | } |
| 484 | } else { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 485 | if(elm->optional) continue; |
| 486 | /* Mandatory element is missing */ |
| 487 | ASN__ENCODE_FAILED; |
| 488 | } |
Bi-Ruei, Chiu | 1f87ac0 | 2017-08-20 01:25:45 +0800 | [diff] [blame] | 489 | if(!elm->type->op->oer_encoder) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 490 | ASN_DEBUG("OER encoder is not defined for type %s", elm->type->name); |
| 491 | ASN__ENCODE_FAILED; |
| 492 | } |
Lev Walkin | a5972be | 2017-09-29 23:15:58 -0700 | [diff] [blame] | 493 | er = elm->type->op->oer_encoder( |
| 494 | elm->type, elm->encoding_constraints.oer_constraints, memb_ptr, cb, |
| 495 | app_key); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 496 | if(er.encoded == -1) { |
| 497 | ASN_DEBUG("... while encoding %s member \"%s\"\n", td->name, |
| 498 | elm->name); |
| 499 | return er; |
| 500 | } |
| 501 | computed_size += er.encoded; |
| 502 | } |
| 503 | |
| 504 | /* |
| 505 | * Before encode extensions, encode extensions additions presense bitmap |
| 506 | # X.696 (08/2015) #16.4. |
| 507 | */ |
| 508 | if(has_extensions) { |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 509 | asn_bit_outp_t extadds; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 510 | |
| 511 | /* Special case allowing us to use exactly one byte for #8.6 */ |
| 512 | size_t aoms_length_bits = specs->aoms_count; |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 513 | size_t aoms_length_bytes = (7 + aoms_length_bits) >> 3; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 514 | uint8_t unused_bits = 0x07 & (8 - (aoms_length_bits & 0x07)); |
| 515 | |
| 516 | assert(1 + aoms_length_bytes <= 127); |
| 517 | |
| 518 | memset(&extadds, 0, sizeof(extadds)); |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 519 | extadds.output = cb; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 520 | extadds.op_key = app_key; |
| 521 | |
| 522 | /* #8.6 length determinant */ |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 523 | ret = asn_put_few_bits(&extadds, (1 + aoms_length_bytes), 8); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 524 | if(ret < 0) ASN__ENCODE_FAILED; |
| 525 | |
| 526 | /* Number of unused bytes, #16.4.2 */ |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 527 | ret = asn_put_few_bits(&extadds, unused_bits, 8); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 528 | if(ret < 0) ASN__ENCODE_FAILED; |
| 529 | |
| 530 | /* Encode presence bitmap #16.4.3 */ |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 531 | for(edx = specs->ext_after + 1; (ssize_t)edx < specs->ext_before - 1; |
| 532 | edx++) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 533 | asn_TYPE_member_t *elm = &td->elements[edx]; |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 534 | const void *memb_ptr = element_ptr(sptr, elm); |
| 535 | if(memb_ptr && elm->default_value_cmp |
| 536 | && elm->default_value_cmp(memb_ptr) == 0) { |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 537 | memb_ptr = 0; /* Do not encode default value. */ |
| 538 | } |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 539 | ret |= asn_put_few_bits(&extadds, memb_ptr ? 1 : 0, 1); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 540 | } |
| 541 | if(ret < 0) ASN__ENCODE_FAILED; |
| 542 | |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 543 | asn_put_aligned_flush(&extadds); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 544 | computed_size += extadds.flushed_bytes; |
| 545 | |
| 546 | /* Now, encode extensions */ |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 547 | for(edx = specs->ext_after + 1; (ssize_t)edx < specs->ext_before - 1; |
| 548 | edx++) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 549 | asn_TYPE_member_t *elm = &td->elements[edx]; |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 550 | const void *memb_ptr = element_ptr(sptr, elm); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 551 | |
| 552 | if(memb_ptr) { |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 553 | if(elm->default_value_cmp |
| 554 | && elm->default_value_cmp(memb_ptr) == 0) { |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 555 | /* Do not encode default value. */ |
| 556 | } else { |
Lev Walkin | 42f6c88 | 2017-10-20 02:39:08 -0700 | [diff] [blame] | 557 | ssize_t wrote = oer_open_type_put( |
Lev Walkin | a5972be | 2017-09-29 23:15:58 -0700 | [diff] [blame] | 558 | elm->type, elm->encoding_constraints.oer_constraints, |
| 559 | memb_ptr, cb, app_key); |
Lev Walkin | 42f6c88 | 2017-10-20 02:39:08 -0700 | [diff] [blame] | 560 | if(wrote == -1) { |
| 561 | ASN__ENCODE_FAILED; |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 562 | } |
Lev Walkin | 42f6c88 | 2017-10-20 02:39:08 -0700 | [diff] [blame] | 563 | computed_size += wrote; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 564 | } |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 565 | } else if(!elm->optional) { |
| 566 | ASN__ENCODE_FAILED; |
| 567 | } |
| 568 | } |
| 569 | } /* if(has_extensions) */ |
| 570 | |
| 571 | |
| 572 | { |
| 573 | asn_enc_rval_t er = {0, 0, 0}; |
| 574 | er.encoded = computed_size; |
| 575 | ASN__ENCODED_OK(er); |
| 576 | } |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 577 | } |
| 578 | |
| 579 | #endif /* ASN_DISABLE_OER_SUPPORT */ |