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 | */ |
Lev Walkin | 8366861 | 2017-10-21 00:24:31 -0700 | [diff] [blame] | 40 | #define IN_EXTENSION_GROUP(specs, memb_idx) \ |
| 41 | ((specs)->first_extension >= 0 \ |
| 42 | && (unsigned)(specs)->first_extension <= (memb_idx)) |
| 43 | |
| 44 | #define IN_ROOT_GROUP_PRED(edx) \ |
| 45 | edx < (specs->first_extension < 0 ? td->elements_count \ |
| 46 | : (size_t)specs->first_extension) |
| 47 | |
| 48 | #define FOR_IN_ROOT_GROUP(edx) for(edx = 0; IN_ROOT_GROUP_PRED(edx); edx++) |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 49 | |
| 50 | /* |
| 51 | * Return a standardized complex structure. |
| 52 | */ |
| 53 | #undef RETURN |
| 54 | #define RETURN(_code) do { \ |
| 55 | rval.code = _code; \ |
| 56 | rval.consumed = consumed_myself;\ |
| 57 | return rval; \ |
| 58 | } while(0) |
| 59 | |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 60 | /* |
| 61 | * Return pointer to a member. |
| 62 | */ |
Lev Walkin | cfc16d3 | 2017-08-30 19:15:08 -0700 | [diff] [blame] | 63 | static void ** |
| 64 | element_ptrptr(void *struct_ptr, asn_TYPE_member_t *elm, void **tmp_save_ptr) { |
| 65 | if(elm->flags & ATF_POINTER) { |
| 66 | /* Member is a pointer to another structure */ |
| 67 | return (void **)((char *)struct_ptr + elm->memb_offset); |
| 68 | } else { |
| 69 | assert(tmp_save_ptr); |
| 70 | *tmp_save_ptr = (void *)((char *)struct_ptr + elm->memb_offset); |
| 71 | return tmp_save_ptr; |
| 72 | } |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 73 | } |
| 74 | |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 75 | static const void * |
| 76 | element_ptr(const void *struct_ptr, const asn_TYPE_member_t *elm) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 77 | if(elm->flags & ATF_POINTER) { |
| 78 | /* Member is a pointer to another structure */ |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 79 | return *(const void *const *)((const char *)struct_ptr |
| 80 | + elm->memb_offset); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 81 | } else { |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 82 | return (const void *)((const char *)struct_ptr + elm->memb_offset); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 83 | } |
| 84 | } |
| 85 | |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 86 | asn_dec_rval_t |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 87 | SEQUENCE_decode_oer(const asn_codec_ctx_t *opt_codec_ctx, |
| 88 | const asn_TYPE_descriptor_t *td, |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 89 | const asn_oer_constraints_t *constraints, void **struct_ptr, |
| 90 | const void *ptr, size_t size) { |
Lev Walkin | d84f603 | 2017-10-03 16:33:59 -0700 | [diff] [blame] | 91 | const asn_SEQUENCE_specifics_t *specs = |
| 92 | (const asn_SEQUENCE_specifics_t *)td->specifics; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 93 | asn_dec_rval_t rval = {RC_OK, 0}; |
| 94 | void *st = *struct_ptr; /* Target structure */ |
| 95 | asn_struct_ctx_t *ctx; /* Decoder context */ |
| 96 | size_t consumed_myself = 0; /* Consumed bytes from ptr. */ |
| 97 | |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 98 | (void)constraints; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 99 | |
Lev Walkin | 62155df | 2017-10-21 01:16:17 -0700 | [diff] [blame] | 100 | if(ASN__STACK_OVERFLOW_CHECK(opt_codec_ctx)) |
| 101 | ASN__DECODE_FAILED; |
| 102 | |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 103 | /* |
| 104 | * Create the target structure if it is not present already. |
| 105 | */ |
| 106 | if(st == 0) { |
| 107 | st = *struct_ptr = CALLOC(1, specs->struct_size); |
| 108 | if(st == 0) { |
| 109 | RETURN(RC_FAIL); |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | /* |
| 114 | * Restore parsing context. |
| 115 | */ |
| 116 | ctx = (asn_struct_ctx_t *)((char *)st + specs->ctx_offset); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 117 | |
| 118 | /* |
| 119 | * Start to parse where left previously. |
| 120 | */ |
| 121 | switch(ctx->phase) { |
| 122 | case 0: { |
| 123 | /* |
| 124 | * Fetch preamble. |
| 125 | */ |
Lev Walkin | d14802f | 2017-10-20 02:58:25 -0700 | [diff] [blame] | 126 | asn_bit_data_t *preamble; |
Lev Walkin | 8366861 | 2017-10-21 00:24:31 -0700 | [diff] [blame] | 127 | int has_extensions_bit = (specs->first_extension >= 0); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 128 | size_t preamble_bits = (has_extensions_bit + specs->roms_count); |
| 129 | size_t preamble_bytes = ((7 + preamble_bits) >> 3); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 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( |
Lev Walkin | 9f470d6 | 2017-10-21 16:27:08 -0700 | [diff] [blame] | 134 | "Expecting preamble bits %" ASN_PRI_SIZE " for %s (including %d extension bits)", |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 135 | preamble_bits, td->name, has_extensions_bit); |
| 136 | |
Lev Walkin | d14802f | 2017-10-20 02:58:25 -0700 | [diff] [blame] | 137 | if(preamble_bytes > size) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 138 | ASN__DECODE_STARVED; |
| 139 | } |
| 140 | |
Lev Walkin | d14802f | 2017-10-20 02:58:25 -0700 | [diff] [blame] | 141 | preamble = asn_bit_data_new_contiguous(ptr, preamble_bits); |
| 142 | if(!preamble) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 143 | RETURN(RC_FAIL); |
| 144 | } |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 145 | preamble->nboff = has_extensions_bit; |
Lev Walkin | d14802f | 2017-10-20 02:58:25 -0700 | [diff] [blame] | 146 | ctx->ptr = preamble; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 147 | ADVANCE(preamble_bytes); |
| 148 | } |
| 149 | NEXT_PHASE(ctx); |
| 150 | /* FALL THROUGH */ |
| 151 | case 1: { |
| 152 | /* Decode components of the extension root */ |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 153 | asn_bit_data_t *preamble = ctx->ptr; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 154 | size_t edx; |
| 155 | |
Lev Walkin | 8366861 | 2017-10-21 00:24:31 -0700 | [diff] [blame] | 156 | ASN_DEBUG("OER SEQUENCE %s Decoding PHASE 1 (Root)", td->name); |
Lev Walkin | bc0b0c5 | 2017-08-02 14:02:48 -0700 | [diff] [blame] | 157 | |
Lev Walkin | d14802f | 2017-10-20 02:58:25 -0700 | [diff] [blame] | 158 | assert(preamble); |
| 159 | |
Lev Walkin | 8366861 | 2017-10-21 00:24:31 -0700 | [diff] [blame] | 160 | for(edx = (ctx->step >> 1); IN_ROOT_GROUP_PRED(edx); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 161 | edx++, ctx->step = (ctx->step & ~1) + 2) { |
| 162 | asn_TYPE_member_t *elm = &td->elements[edx]; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 163 | |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 164 | ASN_DEBUG("Decoding %s->%s", td->name, elm->name); |
| 165 | |
Lev Walkin | 8366861 | 2017-10-21 00:24:31 -0700 | [diff] [blame] | 166 | assert(!IN_EXTENSION_GROUP(specs, edx)); |
| 167 | |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 168 | if(ctx->step & 1) { |
| 169 | goto microphase2_decode_continues; |
| 170 | } |
| 171 | |
| 172 | |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 173 | if(elm->optional) { |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 174 | int32_t present = asn_get_few_bits(preamble, 1); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 175 | if(present < 0) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 176 | ASN_DEBUG("Presence map ended prematurely: %d", present); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 177 | RETURN(RC_FAIL); |
| 178 | } else if(present == 0) { |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 179 | if(elm->default_value_set) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 180 | /* Fill-in DEFAULT */ |
Lev Walkin | cfc16d3 | 2017-08-30 19:15:08 -0700 | [diff] [blame] | 181 | void *tmp; |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 182 | if(elm->default_value_set( |
| 183 | element_ptrptr(st, elm, &tmp))) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 184 | RETURN(RC_FAIL); |
| 185 | } |
| 186 | } |
| 187 | /* The member is not present. */ |
| 188 | continue; |
| 189 | } |
| 190 | /* Present OPTIONAL or DEFAULT component. */ |
| 191 | } |
| 192 | |
| 193 | /* |
| 194 | * MICROPHASE 2: Invoke the member-specific decoder. |
| 195 | */ |
| 196 | ctx->step |= 1; /* Confirm entering next microphase */ |
| 197 | microphase2_decode_continues: |
Lev Walkin | 14fd3e5 | 2017-08-27 01:38:45 -0700 | [diff] [blame] | 198 | if(elm->flags & ATF_OPEN_TYPE) { |
Lev Walkin | f6853ce | 2017-08-11 00:50:27 -0700 | [diff] [blame] | 199 | 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] | 200 | } else { |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 201 | void *save_memb_ptr; /* Temporary reference. */ |
Lev Walkin | f6853ce | 2017-08-11 00:50:27 -0700 | [diff] [blame] | 202 | void **memb_ptr2; /* Pointer to a pointer to a memmber */ |
| 203 | |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 204 | memb_ptr2 = element_ptrptr(st, elm, &save_memb_ptr); |
Lev Walkin | f6853ce | 2017-08-11 00:50:27 -0700 | [diff] [blame] | 205 | |
Lev Walkin | 42f6c88 | 2017-10-20 02:39:08 -0700 | [diff] [blame] | 206 | rval = elm->type->op->oer_decoder( |
| 207 | opt_codec_ctx, elm->type, |
| 208 | elm->encoding_constraints.oer_constraints, memb_ptr2, ptr, |
| 209 | size); |
Lev Walkin | 7c87630 | 2017-08-10 06:11:24 -0700 | [diff] [blame] | 210 | } |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 211 | switch(rval.code) { |
| 212 | case RC_OK: |
| 213 | ADVANCE(rval.consumed); |
| 214 | break; |
| 215 | case RC_WMORE: |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 216 | ASN_DEBUG("More bytes needed at element %s \"%s\"", td->name, |
| 217 | elm->name); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 218 | ADVANCE(rval.consumed); |
| 219 | RETURN(RC_WMORE); |
| 220 | case RC_FAIL: |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 221 | ASN_DEBUG("Decoding failed at element %s \"%s\"", td->name, |
| 222 | elm->name); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 223 | RETURN(RC_FAIL); |
| 224 | } |
| 225 | } /* for(all root members) */ |
| 226 | |
| 227 | } |
| 228 | NEXT_PHASE(ctx); |
| 229 | /* FALL THROUGH */ |
Lev Walkin | d14802f | 2017-10-20 02:58:25 -0700 | [diff] [blame] | 230 | case 2: |
| 231 | assert(ctx->ptr); |
| 232 | { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 233 | /* Cleanup preamble. */ |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 234 | asn_bit_data_t *preamble = ctx->ptr; |
| 235 | asn_bit_data_t *extadds; |
Lev Walkin | 8366861 | 2017-10-21 00:24:31 -0700 | [diff] [blame] | 236 | int has_extensions_bit = (specs->first_extension >= 0); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 237 | int extensions_present = |
Lev Walkin | 1a50389 | 2017-08-31 02:15:11 -0700 | [diff] [blame] | 238 | has_extensions_bit |
| 239 | && (preamble->buffer == NULL |
| 240 | || (((const uint8_t *)preamble->buffer)[0] & 0x80)); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 241 | uint8_t unused_bits; |
| 242 | size_t len = 0; |
| 243 | ssize_t len_len; |
Lev Walkin | bc0b0c5 | 2017-08-02 14:02:48 -0700 | [diff] [blame] | 244 | |
| 245 | ASN_DEBUG("OER SEQUENCE %s Decoding PHASE 2", td->name); |
| 246 | |
Lev Walkin | 1a50389 | 2017-08-31 02:15:11 -0700 | [diff] [blame] | 247 | preamble->buffer = 0; /* Will do extensions_present==1 next time. */ |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 248 | |
| 249 | if(!extensions_present) { |
| 250 | ctx->phase = 10; |
| 251 | RETURN(RC_OK); |
| 252 | } |
| 253 | |
| 254 | /* |
| 255 | * X.696 (08/2015) #16.1 (c), #16.4 |
| 256 | * Read in the extension addition presence bitmap. |
| 257 | */ |
| 258 | |
| 259 | len_len = oer_fetch_length(ptr, size, &len); |
| 260 | if(len_len > 0) { |
| 261 | ADVANCE(len_len); |
Lev Walkin | 42f6c88 | 2017-10-20 02:39:08 -0700 | [diff] [blame] | 262 | } else if(len_len < 0) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 263 | RETURN(RC_FAIL); |
| 264 | } else { |
| 265 | RETURN(RC_WMORE); |
| 266 | } |
| 267 | |
| 268 | if(len == 0) { |
| 269 | /* 16.4.1-2 */ |
| 270 | RETURN(RC_FAIL); |
| 271 | } else if(len > size) { |
| 272 | RETURN(RC_WMORE); |
| 273 | } |
| 274 | |
| 275 | /* Account for unused bits */ |
| 276 | unused_bits = 0x7 & *(const uint8_t *)ptr; |
| 277 | ADVANCE(1); |
| 278 | len--; |
| 279 | if(unused_bits && len == 0) { |
| 280 | RETURN(RC_FAIL); |
| 281 | } |
| 282 | |
| 283 | /* Get the extensions map */ |
Lev Walkin | d14802f | 2017-10-20 02:58:25 -0700 | [diff] [blame] | 284 | extadds = asn_bit_data_new_contiguous(ptr, len * 8 - unused_bits); |
| 285 | if(!extadds) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 286 | RETURN(RC_FAIL); |
| 287 | } |
Lev Walkin | d14802f | 2017-10-20 02:58:25 -0700 | [diff] [blame] | 288 | FREEMEM(preamble); |
| 289 | ctx->ptr = extadds; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 290 | ADVANCE(len); |
| 291 | } |
| 292 | NEXT_PHASE(ctx); |
Lev Walkin | 8366861 | 2017-10-21 00:24:31 -0700 | [diff] [blame] | 293 | ctx->step = |
| 294 | (specs->first_extension < 0 ? td->elements_count |
| 295 | : (size_t)specs->first_extension); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 296 | /* Fall through */ |
| 297 | case 3: |
Lev Walkin | 8366861 | 2017-10-21 00:24:31 -0700 | [diff] [blame] | 298 | ASN_DEBUG("OER SEQUENCE %s Decoding PHASE 3 (Extensions)", td->name); |
| 299 | for(; ctx->step < (signed)td->elements_count; ctx->step++) { |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 300 | asn_bit_data_t *extadds = ctx->ptr; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 301 | size_t edx = ctx->step; |
| 302 | asn_TYPE_member_t *elm = &td->elements[edx]; |
Lev Walkin | 42f6c88 | 2017-10-20 02:39:08 -0700 | [diff] [blame] | 303 | void *tmp_memb_ptr; |
| 304 | void **memb_ptr2 = element_ptrptr(st, elm, &tmp_memb_ptr); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 305 | |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 306 | switch(asn_get_few_bits(extadds, 1)) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 307 | case -1: |
| 308 | /* |
| 309 | * Not every one of our extensions is known to the remote side. |
| 310 | * Continue filling in their defaults though. |
| 311 | */ |
| 312 | /* Fall through */ |
| 313 | case 0: |
| 314 | /* Fill-in DEFAULT */ |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 315 | if(elm->default_value_set |
| 316 | && elm->default_value_set(memb_ptr2)) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 317 | RETURN(RC_FAIL); |
| 318 | } |
| 319 | continue; |
| 320 | case 1: { |
| 321 | /* Read OER open type */ |
Lev Walkin | 42f6c88 | 2017-10-20 02:39:08 -0700 | [diff] [blame] | 322 | ssize_t ot_size = |
| 323 | oer_open_type_get(opt_codec_ctx, elm->type, |
| 324 | elm->encoding_constraints.oer_constraints, |
| 325 | memb_ptr2, ptr, size); |
| 326 | assert(ot_size <= (ssize_t)size); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 327 | if(ot_size > 0) { |
| 328 | ADVANCE(ot_size); |
| 329 | } else if(ot_size < 0) { |
| 330 | RETURN(RC_FAIL); |
| 331 | } else { |
| 332 | /* Roll back open type parsing */ |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 333 | asn_get_undo(extadds, 1); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 334 | RETURN(RC_WMORE); |
| 335 | } |
| 336 | break; |
| 337 | } |
| 338 | default: |
| 339 | RETURN(RC_FAIL); |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | NEXT_PHASE(ctx); |
| 344 | /* Fall through */ |
| 345 | case 4: |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 346 | ASN_DEBUG("OER SEQUENCE %s Decoding PHASE 4", td->name); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 347 | /* Read in the rest of Open Types while ignoring them */ |
| 348 | for(;;) { |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 349 | asn_bit_data_t *extadds = ctx->ptr; |
| 350 | switch(asn_get_few_bits(extadds, 1)) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 351 | case 0: |
| 352 | continue; |
| 353 | case 1: { |
Lev Walkin | 51a1f3f | 2017-07-20 14:52:25 +0300 | [diff] [blame] | 354 | ssize_t skipped = oer_open_type_skip(ptr, size); |
| 355 | if(skipped > 0) { |
| 356 | ADVANCE(skipped); |
| 357 | } else if(skipped < 0) { |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 358 | RETURN(RC_FAIL); |
| 359 | } else { |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 360 | asn_get_undo(extadds, 1); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 361 | RETURN(RC_WMORE); |
| 362 | } |
| 363 | continue; |
| 364 | } |
| 365 | case -1: |
| 366 | /* No more Open Type encoded components */ |
| 367 | break; |
| 368 | default: |
| 369 | RETURN(RC_FAIL); |
| 370 | } |
| 371 | break; |
| 372 | } |
| 373 | } |
| 374 | |
Lev Walkin | 42f6c88 | 2017-10-20 02:39:08 -0700 | [diff] [blame] | 375 | RETURN(RC_OK); |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 376 | } |
| 377 | |
| 378 | /* |
| 379 | * Encode as Canonical OER. |
| 380 | */ |
| 381 | asn_enc_rval_t |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 382 | SEQUENCE_encode_oer(const asn_TYPE_descriptor_t *td, |
| 383 | const asn_oer_constraints_t *constraints, const void *sptr, |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 384 | asn_app_consume_bytes_f *cb, void *app_key) { |
Lev Walkin | d84f603 | 2017-10-03 16:33:59 -0700 | [diff] [blame] | 385 | 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] | 386 | size_t computed_size = 0; |
Lev Walkin | 8366861 | 2017-10-21 00:24:31 -0700 | [diff] [blame] | 387 | int has_extensions_bit = (specs->first_extension >= 0); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 388 | size_t preamble_bits = (has_extensions_bit + specs->roms_count); |
| 389 | uint32_t has_extensions = 0; |
| 390 | size_t edx; |
| 391 | int ret; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 392 | |
Lev Walkin | 494fb70 | 2017-08-07 20:07:00 -0700 | [diff] [blame] | 393 | (void)constraints; |
| 394 | |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 395 | if(preamble_bits) { |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 396 | asn_bit_outp_t preamble; |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 397 | |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 398 | memset(&preamble, 0, sizeof(preamble)); |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 399 | preamble.output = cb; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 400 | preamble.op_key = app_key; |
| 401 | |
| 402 | if(has_extensions_bit) { |
Lev Walkin | 8366861 | 2017-10-21 00:24:31 -0700 | [diff] [blame] | 403 | for(edx = specs->first_extension; edx < td->elements_count; edx++) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 404 | asn_TYPE_member_t *elm = &td->elements[edx]; |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 405 | const void *memb_ptr = element_ptr(sptr, elm); |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 406 | if(memb_ptr) { |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 407 | if(elm->default_value_cmp |
| 408 | && elm->default_value_cmp(memb_ptr) == 0) { |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 409 | /* Do not encode default values in extensions */ |
| 410 | } else { |
| 411 | has_extensions = 1; |
| 412 | break; |
| 413 | } |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 414 | } |
| 415 | } |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 416 | ret = asn_put_few_bits(&preamble, has_extensions, 1); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 417 | assert(ret == 0); |
| 418 | if(ret < 0) { |
| 419 | ASN__ENCODE_FAILED; |
| 420 | } |
| 421 | } |
| 422 | |
| 423 | /* |
| 424 | * Encode optional components bitmap. |
| 425 | */ |
| 426 | if(specs->roms_count) { |
Lev Walkin | 8366861 | 2017-10-21 00:24:31 -0700 | [diff] [blame] | 427 | FOR_IN_ROOT_GROUP(edx) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 428 | asn_TYPE_member_t *elm = &td->elements[edx]; |
| 429 | |
| 430 | if(IN_EXTENSION_GROUP(specs, edx)) break; |
| 431 | |
| 432 | if(elm->optional) { |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 433 | const void *memb_ptr = element_ptr(sptr, elm); |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 434 | uint32_t has_component = memb_ptr != NULL; |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 435 | if(has_component && elm->default_value_cmp |
Lev Walkin | 3c37385 | 2017-10-21 01:09:13 -0700 | [diff] [blame] | 436 | && elm->default_value_cmp(memb_ptr) == 0) { |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 437 | has_component = 0; |
| 438 | } |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 439 | ret = asn_put_few_bits(&preamble, has_component, 1); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 440 | if(ret < 0) { |
| 441 | ASN__ENCODE_FAILED; |
| 442 | } |
| 443 | } |
| 444 | } |
| 445 | } |
| 446 | |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 447 | asn_put_aligned_flush(&preamble); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 448 | computed_size += preamble.flushed_bytes; |
| 449 | } /* if(preamble_bits) */ |
| 450 | |
| 451 | /* |
| 452 | * Put root components and extensions root. |
| 453 | */ |
| 454 | for(edx = 0; edx < td->elements_count; edx++) { |
| 455 | asn_TYPE_member_t *elm = &td->elements[edx]; |
| 456 | asn_enc_rval_t er; |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 457 | const void *memb_ptr; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 458 | |
| 459 | if(IN_EXTENSION_GROUP(specs, edx)) break; |
| 460 | |
| 461 | memb_ptr = element_ptr(sptr, elm); |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 462 | if(memb_ptr) { |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 463 | if(elm->default_value_cmp |
| 464 | && elm->default_value_cmp(memb_ptr) == 0) { |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 465 | /* Skip default values in encoding */ |
| 466 | continue; |
| 467 | } |
| 468 | } else { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 469 | if(elm->optional) continue; |
| 470 | /* Mandatory element is missing */ |
| 471 | ASN__ENCODE_FAILED; |
| 472 | } |
Bi-Ruei, Chiu | 1f87ac0 | 2017-08-20 01:25:45 +0800 | [diff] [blame] | 473 | if(!elm->type->op->oer_encoder) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 474 | ASN_DEBUG("OER encoder is not defined for type %s", elm->type->name); |
| 475 | ASN__ENCODE_FAILED; |
| 476 | } |
Lev Walkin | a5972be | 2017-09-29 23:15:58 -0700 | [diff] [blame] | 477 | er = elm->type->op->oer_encoder( |
| 478 | elm->type, elm->encoding_constraints.oer_constraints, memb_ptr, cb, |
| 479 | app_key); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 480 | if(er.encoded == -1) { |
| 481 | ASN_DEBUG("... while encoding %s member \"%s\"\n", td->name, |
| 482 | elm->name); |
| 483 | return er; |
| 484 | } |
| 485 | computed_size += er.encoded; |
| 486 | } |
| 487 | |
| 488 | /* |
| 489 | * Before encode extensions, encode extensions additions presense bitmap |
| 490 | # X.696 (08/2015) #16.4. |
| 491 | */ |
| 492 | if(has_extensions) { |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 493 | asn_bit_outp_t extadds; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 494 | |
| 495 | /* Special case allowing us to use exactly one byte for #8.6 */ |
| 496 | size_t aoms_length_bits = specs->aoms_count; |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 497 | size_t aoms_length_bytes = (7 + aoms_length_bits) >> 3; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 498 | uint8_t unused_bits = 0x07 & (8 - (aoms_length_bits & 0x07)); |
| 499 | |
| 500 | assert(1 + aoms_length_bytes <= 127); |
| 501 | |
| 502 | memset(&extadds, 0, sizeof(extadds)); |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 503 | extadds.output = cb; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 504 | extadds.op_key = app_key; |
| 505 | |
| 506 | /* #8.6 length determinant */ |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 507 | ret = asn_put_few_bits(&extadds, (1 + aoms_length_bytes), 8); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 508 | if(ret < 0) ASN__ENCODE_FAILED; |
| 509 | |
| 510 | /* Number of unused bytes, #16.4.2 */ |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 511 | ret = asn_put_few_bits(&extadds, unused_bits, 8); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 512 | if(ret < 0) ASN__ENCODE_FAILED; |
| 513 | |
| 514 | /* Encode presence bitmap #16.4.3 */ |
Lev Walkin | 8366861 | 2017-10-21 00:24:31 -0700 | [diff] [blame] | 515 | for(edx = specs->first_extension; edx < td->elements_count; edx++) { |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 516 | asn_TYPE_member_t *elm = &td->elements[edx]; |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 517 | const void *memb_ptr = element_ptr(sptr, elm); |
| 518 | if(memb_ptr && elm->default_value_cmp |
| 519 | && elm->default_value_cmp(memb_ptr) == 0) { |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 520 | memb_ptr = 0; /* Do not encode default value. */ |
| 521 | } |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 522 | ret |= asn_put_few_bits(&extadds, memb_ptr ? 1 : 0, 1); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 523 | } |
| 524 | if(ret < 0) ASN__ENCODE_FAILED; |
| 525 | |
Lev Walkin | 6cd0d56 | 2017-08-25 11:57:01 -0700 | [diff] [blame] | 526 | asn_put_aligned_flush(&extadds); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 527 | computed_size += extadds.flushed_bytes; |
| 528 | |
| 529 | /* Now, encode extensions */ |
Lev Walkin | 8366861 | 2017-10-21 00:24:31 -0700 | [diff] [blame] | 530 | for(edx = specs->first_extension; edx < td->elements_count; 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); |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 533 | |
| 534 | if(memb_ptr) { |
Lev Walkin | 20696a4 | 2017-10-17 21:27:33 -0700 | [diff] [blame] | 535 | if(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 | /* Do not encode default value. */ |
| 538 | } else { |
Lev Walkin | 42f6c88 | 2017-10-20 02:39:08 -0700 | [diff] [blame] | 539 | ssize_t wrote = oer_open_type_put( |
Lev Walkin | a5972be | 2017-09-29 23:15:58 -0700 | [diff] [blame] | 540 | elm->type, elm->encoding_constraints.oer_constraints, |
| 541 | memb_ptr, cb, app_key); |
Lev Walkin | 42f6c88 | 2017-10-20 02:39:08 -0700 | [diff] [blame] | 542 | if(wrote == -1) { |
| 543 | ASN__ENCODE_FAILED; |
Lev Walkin | 09bec46 | 2017-08-31 01:31:43 -0700 | [diff] [blame] | 544 | } |
Lev Walkin | 42f6c88 | 2017-10-20 02:39:08 -0700 | [diff] [blame] | 545 | computed_size += wrote; |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 546 | } |
Lev Walkin | 890e603 | 2017-07-24 01:48:59 +0400 | [diff] [blame] | 547 | } else if(!elm->optional) { |
| 548 | ASN__ENCODE_FAILED; |
| 549 | } |
| 550 | } |
| 551 | } /* if(has_extensions) */ |
| 552 | |
| 553 | |
| 554 | { |
| 555 | asn_enc_rval_t er = {0, 0, 0}; |
| 556 | er.encoded = computed_size; |
| 557 | ASN__ENCODED_OK(er); |
| 558 | } |
Lev Walkin | d88bea9 | 2017-07-20 11:21:30 +0300 | [diff] [blame] | 559 | } |
| 560 | |
| 561 | #endif /* ASN_DISABLE_OER_SUPPORT */ |