Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 1 | /*- |
| 2 | * Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved. |
| 3 | * Redistribution and modifications are permitted subject to BSD license. |
| 4 | */ |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 5 | #include <asn_internal.h> |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 6 | #include <constr_CHOICE.h> |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 7 | #include <assert.h> |
| 8 | |
| 9 | /* |
| 10 | * Number of bytes left for this structure. |
| 11 | * (ctx->left) indicates the number of bytes _transferred_ for the structure. |
| 12 | * (size) contains the number of bytes in the buffer passed. |
| 13 | */ |
Lev Walkin | ec1ffd4 | 2004-08-18 04:53:32 +0000 | [diff] [blame] | 14 | #define LEFT ((size<(size_t)ctx->left)?size:(size_t)ctx->left) |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 15 | |
| 16 | /* |
| 17 | * If the subprocessor function returns with an indication that it wants |
| 18 | * more data, it may well be a fatal decoding problem, because the |
| 19 | * size is constrained by the <TLV>'s L, even if the buffer size allows |
| 20 | * reading more data. |
| 21 | * For example, consider the buffer containing the following TLVs: |
| 22 | * <T:5><L:1><V> <T:6>... |
| 23 | * The TLV length clearly indicates that one byte is expected in V, but |
| 24 | * if the V processor returns with "want more data" even if the buffer |
| 25 | * contains way more data than the V processor have seen. |
| 26 | */ |
Lev Walkin | d9bd775 | 2004-06-05 08:17:50 +0000 | [diff] [blame] | 27 | #define SIZE_VIOLATION (ctx->left >= 0 && (size_t)ctx->left <= size) |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 28 | |
| 29 | /* |
| 30 | * This macro "eats" the part of the buffer which is definitely "consumed", |
| 31 | * i.e. was correctly converted into local representation or rightfully skipped. |
| 32 | */ |
Lev Walkin | cc6a910 | 2004-09-23 22:06:26 +0000 | [diff] [blame] | 33 | #undef ADVANCE |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 34 | #define ADVANCE(num_bytes) do { \ |
| 35 | size_t num = num_bytes; \ |
Lev Walkin | 4ce78ca | 2004-08-25 01:34:11 +0000 | [diff] [blame] | 36 | ptr = ((char *)ptr) + num; \ |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 37 | size -= num; \ |
| 38 | if(ctx->left >= 0) \ |
| 39 | ctx->left -= num; \ |
| 40 | consumed_myself += num; \ |
| 41 | } while(0) |
| 42 | |
| 43 | /* |
| 44 | * Switch to the next phase of parsing. |
| 45 | */ |
Lev Walkin | cc6a910 | 2004-09-23 22:06:26 +0000 | [diff] [blame] | 46 | #undef NEXT_PHASE |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 47 | #define NEXT_PHASE(ctx) do { \ |
| 48 | ctx->phase++; \ |
| 49 | ctx->step = 0; \ |
| 50 | } while(0) |
| 51 | |
| 52 | /* |
| 53 | * Return a standardized complex structure. |
| 54 | */ |
Lev Walkin | cc6a910 | 2004-09-23 22:06:26 +0000 | [diff] [blame] | 55 | #undef RETURN |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 56 | #define RETURN(_code) do { \ |
| 57 | rval.code = _code; \ |
| 58 | rval.consumed = consumed_myself;\ |
| 59 | return rval; \ |
| 60 | } while(0) |
| 61 | |
| 62 | /* |
| 63 | * See the definitions. |
| 64 | */ |
Lev Walkin | 91f5cd0 | 2004-08-11 09:10:59 +0000 | [diff] [blame] | 65 | static int _fetch_present_idx(const void *struct_ptr, int off, int size); |
| 66 | static void _set_present_idx(void *sptr, int offset, int size, int pres); |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 67 | |
| 68 | /* |
| 69 | * Tags are canonically sorted in the tag to member table. |
| 70 | */ |
| 71 | static int |
| 72 | _search4tag(const void *ap, const void *bp) { |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 73 | const asn_TYPE_tag2member_t *a = (const asn_TYPE_tag2member_t *)ap; |
| 74 | const asn_TYPE_tag2member_t *b = (const asn_TYPE_tag2member_t *)bp; |
Lev Walkin | c234657 | 2004-08-11 09:07:36 +0000 | [diff] [blame] | 75 | |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 76 | int a_class = BER_TAG_CLASS(a->el_tag); |
| 77 | int b_class = BER_TAG_CLASS(b->el_tag); |
| 78 | |
| 79 | if(a_class == b_class) { |
| 80 | ber_tlv_tag_t a_value = BER_TAG_VALUE(a->el_tag); |
| 81 | ber_tlv_tag_t b_value = BER_TAG_VALUE(b->el_tag); |
| 82 | |
| 83 | if(a_value == b_value) |
| 84 | return 0; |
| 85 | else if(a_value < b_value) |
| 86 | return -1; |
| 87 | else |
| 88 | return 1; |
| 89 | } else if(a_class < b_class) { |
| 90 | return -1; |
| 91 | } else { |
| 92 | return 1; |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | /* |
| 97 | * The decoder of the CHOICE type. |
| 98 | */ |
Lev Walkin | dc06f6b | 2004-10-20 15:50:55 +0000 | [diff] [blame] | 99 | asn_dec_rval_t |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 100 | CHOICE_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td, |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 101 | void **struct_ptr, void *ptr, size_t size, int tag_mode) { |
| 102 | /* |
| 103 | * Bring closer parts of structure description. |
| 104 | */ |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 105 | asn_CHOICE_specifics_t *specs = (asn_CHOICE_specifics_t *)td->specifics; |
| 106 | asn_TYPE_member_t *elements = td->elements; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 107 | |
| 108 | /* |
| 109 | * Parts of the structure being constructed. |
| 110 | */ |
| 111 | void *st = *struct_ptr; /* Target structure. */ |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 112 | asn_struct_ctx_t *ctx; /* Decoder context */ |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 113 | |
| 114 | ber_tlv_tag_t tlv_tag; /* T from TLV */ |
| 115 | ssize_t tag_len; /* Length of TLV's T */ |
Lev Walkin | dc06f6b | 2004-10-20 15:50:55 +0000 | [diff] [blame] | 116 | asn_dec_rval_t rval; /* Return code from subparsers */ |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 117 | |
| 118 | ssize_t consumed_myself = 0; /* Consumed bytes from ptr */ |
| 119 | |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 120 | ASN_DEBUG("Decoding %s as CHOICE", td->name); |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 121 | |
| 122 | /* |
| 123 | * Create the target structure if it is not present already. |
| 124 | */ |
| 125 | if(st == 0) { |
| 126 | st = *struct_ptr = CALLOC(1, specs->struct_size); |
| 127 | if(st == 0) { |
| 128 | RETURN(RC_FAIL); |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | /* |
| 133 | * Restore parsing context. |
| 134 | */ |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 135 | ctx = (asn_struct_ctx_t *)((char *)st + specs->ctx_offset); |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 136 | |
| 137 | /* |
| 138 | * Start to parse where left previously |
| 139 | */ |
| 140 | switch(ctx->phase) { |
| 141 | case 0: |
| 142 | /* |
| 143 | * PHASE 0. |
| 144 | * Check that the set of tags associated with given structure |
| 145 | * perfectly fits our expectations. |
| 146 | */ |
| 147 | |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 148 | if(tag_mode || td->tags_count) { |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 149 | rval = ber_check_tags(opt_codec_ctx, td, ctx, ptr, size, |
Lev Walkin | 8e8078a | 2004-09-26 13:10:40 +0000 | [diff] [blame] | 150 | tag_mode, -1, &ctx->left, 0); |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 151 | if(rval.code != RC_OK) { |
| 152 | ASN_DEBUG("%s tagging check failed: %d", |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 153 | td->name, rval.code); |
Lev Walkin | f0f04d1 | 2004-10-05 06:36:02 +0000 | [diff] [blame] | 154 | return rval; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 155 | } |
| 156 | |
| 157 | if(ctx->left >= 0) { |
| 158 | /* ?Substracted below! */ |
| 159 | ctx->left += rval.consumed; |
| 160 | } |
| 161 | ADVANCE(rval.consumed); |
| 162 | } else { |
| 163 | ctx->left = -1; |
| 164 | } |
| 165 | |
| 166 | NEXT_PHASE(ctx); |
| 167 | |
| 168 | ASN_DEBUG("Structure consumes %ld bytes, buffer %ld", |
| 169 | (long)ctx->left, (long)size); |
| 170 | |
| 171 | /* Fall through */ |
| 172 | case 1: |
| 173 | /* |
| 174 | * Fetch the T from TLV. |
| 175 | */ |
| 176 | tag_len = ber_fetch_tag(ptr, LEFT, &tlv_tag); |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 177 | ASN_DEBUG("In %s CHOICE tag length %d", td->name, (int)tag_len); |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 178 | switch(tag_len) { |
| 179 | case 0: if(!SIZE_VIOLATION) RETURN(RC_WMORE); |
| 180 | /* Fall through */ |
| 181 | case -1: RETURN(RC_FAIL); |
| 182 | } |
| 183 | |
| 184 | do { |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 185 | asn_TYPE_tag2member_t *t2m; |
| 186 | asn_TYPE_tag2member_t key; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 187 | |
| 188 | key.el_tag = tlv_tag; |
Lev Walkin | c234657 | 2004-08-11 09:07:36 +0000 | [diff] [blame] | 189 | (void *)t2m = bsearch(&key, |
| 190 | specs->tag2el, specs->tag2el_count, |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 191 | sizeof(specs->tag2el[0]), _search4tag); |
| 192 | if(t2m) { |
| 193 | /* |
| 194 | * Found the element corresponding to the tag. |
| 195 | */ |
| 196 | NEXT_PHASE(ctx); |
| 197 | ctx->step = t2m->el_no; |
| 198 | break; |
| 199 | } else if(specs->extensible == 0) { |
| 200 | ASN_DEBUG("Unexpected tag %s " |
| 201 | "in non-extensible CHOICE %s", |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 202 | ber_tlv_tag_string(tlv_tag), td->name); |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 203 | RETURN(RC_FAIL); |
| 204 | } else { |
| 205 | /* Skip this tag */ |
| 206 | ssize_t skip; |
| 207 | |
| 208 | ASN_DEBUG("Skipping unknown tag %s", |
| 209 | ber_tlv_tag_string(tlv_tag)); |
| 210 | |
Lev Walkin | baaa24f | 2004-09-29 14:19:14 +0000 | [diff] [blame] | 211 | skip = ber_skip_length(opt_codec_ctx, |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 212 | BER_TLV_CONSTRUCTED(ptr), |
Lev Walkin | 4d9528c | 2004-08-11 08:10:13 +0000 | [diff] [blame] | 213 | (char *)ptr + tag_len, LEFT - tag_len); |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 214 | |
| 215 | switch(skip) { |
| 216 | case 0: if(!SIZE_VIOLATION) RETURN(RC_WMORE); |
| 217 | /* Fall through */ |
| 218 | case -1: RETURN(RC_FAIL); |
| 219 | } |
| 220 | |
| 221 | ADVANCE(skip + tag_len); |
| 222 | RETURN(RC_OK); |
| 223 | } |
| 224 | } while(0); |
| 225 | |
| 226 | case 2: |
| 227 | /* |
| 228 | * PHASE 2. |
| 229 | * Read in the element. |
| 230 | */ |
| 231 | do { |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 232 | asn_TYPE_member_t *elm;/* CHOICE's element */ |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 233 | void *memb_ptr; /* Pointer to the member */ |
Lev Walkin | c234657 | 2004-08-11 09:07:36 +0000 | [diff] [blame] | 234 | void **memb_ptr2; /* Pointer to that pointer */ |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 235 | |
| 236 | elm = &elements[ctx->step]; |
| 237 | |
| 238 | /* |
| 239 | * Compute the position of the member inside a structure, |
| 240 | * and also a type of containment (it may be contained |
| 241 | * as pointer or using inline inclusion). |
| 242 | */ |
Lev Walkin | cc93b0f | 2004-09-10 09:18:20 +0000 | [diff] [blame] | 243 | if(elm->flags & ATF_POINTER) { |
| 244 | /* Member is a pointer to another structure */ |
Lev Walkin | c234657 | 2004-08-11 09:07:36 +0000 | [diff] [blame] | 245 | memb_ptr2 = (void **)((char *)st + elm->memb_offset); |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 246 | } else { |
| 247 | /* |
| 248 | * A pointer to a pointer |
| 249 | * holding the start of the structure |
| 250 | */ |
| 251 | memb_ptr = (char *)st + elm->memb_offset; |
| 252 | memb_ptr2 = &memb_ptr; |
| 253 | } |
| 254 | /* |
| 255 | * Invoke the member fetch routine according to member's type |
| 256 | */ |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 257 | rval = elm->type->ber_decoder(opt_codec_ctx, elm->type, |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 258 | memb_ptr2, ptr, LEFT, |
| 259 | elm->tag_mode); |
| 260 | switch(rval.code) { |
| 261 | case RC_OK: |
| 262 | _set_present_idx(st, specs->pres_offset, |
| 263 | specs->pres_size, ctx->step + 1); |
| 264 | break; |
| 265 | case RC_WMORE: /* More data expected */ |
| 266 | if(!SIZE_VIOLATION) { |
| 267 | ADVANCE(rval.consumed); |
| 268 | RETURN(RC_WMORE); |
| 269 | } |
| 270 | RETURN(RC_FAIL); |
| 271 | case RC_FAIL: /* Fatal error */ |
| 272 | RETURN(rval.code); |
| 273 | } /* switch(rval) */ |
| 274 | |
| 275 | ADVANCE(rval.consumed); |
| 276 | } while(0); |
| 277 | |
| 278 | NEXT_PHASE(ctx); |
| 279 | |
| 280 | /* Fall through */ |
| 281 | case 3: |
| 282 | ASN_DEBUG("CHOICE %s Leftover: %ld, size = %ld, tm=%d, tc=%d", |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 283 | td->name, (long)ctx->left, (long)size, |
| 284 | tag_mode, td->tags_count); |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 285 | |
| 286 | if(ctx->left > 0) { |
| 287 | /* |
| 288 | * The type must be fully decoded |
| 289 | * by the CHOICE member-specific decoder. |
| 290 | */ |
| 291 | RETURN(RC_FAIL); |
| 292 | } |
| 293 | |
| 294 | if(ctx->left == -1 |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 295 | && !(tag_mode || td->tags_count)) { |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 296 | /* |
| 297 | * This is an untagged CHOICE. |
| 298 | * It doesn't contain nothing |
| 299 | * except for the member itself, including all its tags. |
| 300 | * The decoding is completed. |
| 301 | */ |
| 302 | NEXT_PHASE(ctx); |
| 303 | break; |
| 304 | } |
| 305 | |
| 306 | /* |
| 307 | * Read in the "end of data chunks"'s. |
| 308 | */ |
| 309 | while(ctx->left < 0) { |
| 310 | ssize_t tl; |
| 311 | |
| 312 | tl = ber_fetch_tag(ptr, LEFT, &tlv_tag); |
| 313 | switch(tl) { |
| 314 | case 0: if(!SIZE_VIOLATION) RETURN(RC_WMORE); |
| 315 | /* Fall through */ |
| 316 | case -1: RETURN(RC_FAIL); |
| 317 | } |
| 318 | |
| 319 | /* |
| 320 | * Expected <0><0>... |
| 321 | */ |
| 322 | if(((uint8_t *)ptr)[0] == 0) { |
| 323 | if(LEFT < 2) { |
| 324 | if(SIZE_VIOLATION) |
| 325 | RETURN(RC_FAIL); |
| 326 | else |
| 327 | RETURN(RC_WMORE); |
| 328 | } else if(((uint8_t *)ptr)[1] == 0) { |
| 329 | /* |
| 330 | * Correctly finished with <0><0>. |
| 331 | */ |
Lev Walkin | f0f04d1 | 2004-10-05 06:36:02 +0000 | [diff] [blame] | 332 | ADVANCE(2); |
| 333 | ctx->left++; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 334 | continue; |
| 335 | } |
| 336 | } else { |
| 337 | ASN_DEBUG("Unexpected continuation in %s", |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 338 | td->name); |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 339 | RETURN(RC_FAIL); |
| 340 | } |
| 341 | |
Lev Walkin | f0f04d1 | 2004-10-05 06:36:02 +0000 | [diff] [blame] | 342 | /* UNREACHABLE */ |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 343 | } |
| 344 | |
| 345 | NEXT_PHASE(ctx); |
| 346 | case 4: |
| 347 | /* No meaningful work here */ |
| 348 | break; |
| 349 | } |
| 350 | |
| 351 | RETURN(RC_OK); |
| 352 | } |
| 353 | |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 354 | asn_enc_rval_t |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 355 | CHOICE_encode_der(asn_TYPE_descriptor_t *td, |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 356 | void *struct_ptr, |
| 357 | int tag_mode, ber_tlv_tag_t tag, |
| 358 | asn_app_consume_bytes_f *cb, void *app_key) { |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 359 | asn_CHOICE_specifics_t *specs = (asn_CHOICE_specifics_t *)td->specifics; |
| 360 | asn_TYPE_member_t *elm; /* CHOICE element */ |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 361 | asn_enc_rval_t erval; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 362 | void *memb_ptr; |
| 363 | size_t computed_size = 0; |
| 364 | int present; |
| 365 | |
| 366 | ASN_DEBUG("%s %s as CHOICE", |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 367 | cb?"Encoding":"Estimating", td->name); |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 368 | |
| 369 | present = _fetch_present_idx(struct_ptr, |
| 370 | specs->pres_offset, specs->pres_size); |
| 371 | |
| 372 | /* |
| 373 | * If the structure was not initialized, it cannot be encoded: |
| 374 | * can't deduce what to encode in the choice type. |
| 375 | */ |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 376 | if(present <= 0 || present > td->elements_count) { |
| 377 | if(present == 0 && td->elements_count == 0) { |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 378 | /* The CHOICE is empty?! */ |
| 379 | erval.encoded = 0; |
| 380 | return erval; |
| 381 | } |
| 382 | erval.encoded = -1; |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 383 | erval.failed_type = td; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 384 | erval.structure_ptr = struct_ptr; |
| 385 | return erval; |
| 386 | } |
| 387 | |
| 388 | /* |
| 389 | * Seek over the present member of the structure. |
| 390 | */ |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 391 | elm = &td->elements[present-1]; |
Lev Walkin | cc93b0f | 2004-09-10 09:18:20 +0000 | [diff] [blame] | 392 | if(elm->flags & ATF_POINTER) { |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 393 | memb_ptr = *(void **)((char *)struct_ptr + elm->memb_offset); |
| 394 | if(memb_ptr == 0) { |
Lev Walkin | cc93b0f | 2004-09-10 09:18:20 +0000 | [diff] [blame] | 395 | if(elm->optional) { |
| 396 | erval.encoded = 0; |
| 397 | } else { |
| 398 | /* Mandatory element absent */ |
| 399 | erval.encoded = -1; |
| 400 | erval.failed_type = td; |
| 401 | erval.structure_ptr = struct_ptr; |
| 402 | } |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 403 | return erval; |
| 404 | } |
| 405 | } else { |
| 406 | memb_ptr = (void *)((char *)struct_ptr + elm->memb_offset); |
| 407 | } |
| 408 | |
| 409 | /* |
| 410 | * If the CHOICE itself is tagged EXPLICIT: |
| 411 | * T ::= [2] EXPLICIT CHOICE { ... } |
| 412 | * Then emit the appropriate tags. |
| 413 | */ |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 414 | if(tag_mode == 1 || td->tags_count) { |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 415 | /* |
| 416 | * For this, we need to pre-compute the member. |
| 417 | */ |
| 418 | ssize_t ret; |
| 419 | |
| 420 | /* Encode member with its tag */ |
| 421 | erval = elm->type->der_encoder(elm->type, memb_ptr, |
| 422 | elm->tag_mode, elm->tag, 0, 0); |
| 423 | if(erval.encoded == -1) |
| 424 | return erval; |
| 425 | |
| 426 | /* Encode CHOICE with parent or my own tag */ |
Lev Walkin | 8e8078a | 2004-09-26 13:10:40 +0000 | [diff] [blame] | 427 | ret = der_write_tags(td, erval.encoded, tag_mode, 1, tag, |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 428 | cb, app_key); |
| 429 | if(ret == -1) { |
| 430 | erval.encoded = -1; |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 431 | erval.failed_type = td; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 432 | erval.structure_ptr = struct_ptr; |
| 433 | return erval; |
| 434 | } |
| 435 | computed_size += ret; |
| 436 | } |
| 437 | |
| 438 | /* |
| 439 | * Encode the single underlying member. |
| 440 | */ |
| 441 | erval = elm->type->der_encoder(elm->type, memb_ptr, |
| 442 | elm->tag_mode, elm->tag, cb, app_key); |
| 443 | if(erval.encoded == -1) |
| 444 | return erval; |
| 445 | |
| 446 | ASN_DEBUG("Encoded CHOICE member in %ld bytes (+%ld)", |
| 447 | (long)erval.encoded, (long)computed_size); |
| 448 | |
| 449 | erval.encoded += computed_size; |
| 450 | |
| 451 | return erval; |
| 452 | } |
| 453 | |
| 454 | ber_tlv_tag_t |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 455 | CHOICE_outmost_tag(asn_TYPE_descriptor_t *td, const void *ptr, int tag_mode, ber_tlv_tag_t tag) { |
| 456 | asn_CHOICE_specifics_t *specs = (asn_CHOICE_specifics_t *)td->specifics; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 457 | int present; |
| 458 | |
| 459 | assert(tag_mode == 0); |
| 460 | assert(tag == 0); |
| 461 | |
| 462 | /* |
| 463 | * Figure out which CHOICE element is encoded. |
| 464 | */ |
| 465 | present = _fetch_present_idx(ptr, specs->pres_offset, specs->pres_size); |
| 466 | |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 467 | if(present > 0 || present <= td->elements_count) { |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 468 | asn_TYPE_member_t *elm = &td->elements[present-1]; |
Lev Walkin | 70e7028 | 2004-06-05 01:45:48 +0000 | [diff] [blame] | 469 | const void *memb_ptr; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 470 | |
Lev Walkin | cc93b0f | 2004-09-10 09:18:20 +0000 | [diff] [blame] | 471 | if(elm->flags & ATF_POINTER) { |
Lev Walkin | 70e7028 | 2004-06-05 01:45:48 +0000 | [diff] [blame] | 472 | memb_ptr = *(const void * const *) |
| 473 | ((const char *)ptr + elm->memb_offset); |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 474 | } else { |
Lev Walkin | 70e7028 | 2004-06-05 01:45:48 +0000 | [diff] [blame] | 475 | memb_ptr = (const void *) |
| 476 | ((const char *)ptr + elm->memb_offset); |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 477 | } |
| 478 | |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 479 | return asn_TYPE_outmost_tag(elm->type, memb_ptr, |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 480 | elm->tag_mode, elm->tag); |
| 481 | } else { |
Lev Walkin | 4d9528c | 2004-08-11 08:10:13 +0000 | [diff] [blame] | 482 | return (ber_tlv_tag_t)-1; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 483 | } |
| 484 | } |
| 485 | |
| 486 | int |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 487 | CHOICE_constraint(asn_TYPE_descriptor_t *td, const void *sptr, |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 488 | asn_app_consume_bytes_f *app_errlog, void *app_key) { |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 489 | asn_CHOICE_specifics_t *specs = (asn_CHOICE_specifics_t *)td->specifics; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 490 | int present; |
| 491 | |
| 492 | if(!sptr) { |
Lev Walkin | ba4e518 | 2004-08-11 09:44:13 +0000 | [diff] [blame] | 493 | _ASN_ERRLOG(app_errlog, app_key, |
Lev Walkin | 16835b6 | 2004-08-22 13:47:59 +0000 | [diff] [blame] | 494 | "%s: value not given (%s:%d)", |
| 495 | td->name, __FILE__, __LINE__); |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 496 | return -1; |
| 497 | } |
| 498 | |
| 499 | /* |
| 500 | * Figure out which CHOICE element is encoded. |
| 501 | */ |
| 502 | present = _fetch_present_idx(sptr, specs->pres_offset,specs->pres_size); |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 503 | if(present > 0 && present <= td->elements_count) { |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 504 | asn_TYPE_member_t *elm = &td->elements[present-1]; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 505 | const void *memb_ptr; |
| 506 | |
Lev Walkin | cc93b0f | 2004-09-10 09:18:20 +0000 | [diff] [blame] | 507 | if(elm->flags & ATF_POINTER) { |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 508 | memb_ptr = *(const void * const *)((const char *)sptr + elm->memb_offset); |
Lev Walkin | cc93b0f | 2004-09-10 09:18:20 +0000 | [diff] [blame] | 509 | if(!memb_ptr) { |
| 510 | if(elm->optional) |
| 511 | return 0; |
| 512 | _ASN_ERRLOG(app_errlog, app_key, |
| 513 | "%s: mandatory CHOICE element %s absent (%s:%d)", |
| 514 | td->name, elm->name, __FILE__, __LINE__); |
| 515 | return -1; |
| 516 | } |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 517 | } else { |
| 518 | memb_ptr = (const void *)((const char *)sptr + elm->memb_offset); |
| 519 | } |
| 520 | |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 521 | if(elm->memb_constraints) { |
| 522 | return elm->memb_constraints(elm->type, memb_ptr, |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 523 | app_errlog, app_key); |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 524 | } else { |
| 525 | int ret = elm->type->check_constraints(elm->type, |
| 526 | memb_ptr, app_errlog, app_key); |
| 527 | /* |
| 528 | * Cannot inherit it eralier: |
| 529 | * need to make sure we get the updated version. |
| 530 | */ |
| 531 | elm->memb_constraints = elm->type->check_constraints; |
| 532 | return ret; |
| 533 | } |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 534 | } else { |
Lev Walkin | ba4e518 | 2004-08-11 09:44:13 +0000 | [diff] [blame] | 535 | _ASN_ERRLOG(app_errlog, app_key, |
Lev Walkin | d34a851 | 2004-08-22 13:55:49 +0000 | [diff] [blame] | 536 | "%s: no CHOICE element given (%s:%d)", |
Lev Walkin | 16835b6 | 2004-08-22 13:47:59 +0000 | [diff] [blame] | 537 | td->name, __FILE__, __LINE__); |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 538 | return -1; |
| 539 | } |
| 540 | } |
| 541 | |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 542 | asn_enc_rval_t |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 543 | CHOICE_encode_xer(asn_TYPE_descriptor_t *td, void *sptr, |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 544 | int ilevel, enum xer_encoder_flags_e flags, |
| 545 | asn_app_consume_bytes_f *cb, void *app_key) { |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 546 | asn_CHOICE_specifics_t *specs=(asn_CHOICE_specifics_t *)td->specifics; |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 547 | asn_enc_rval_t er; |
| 548 | int present; |
| 549 | |
| 550 | if(!sptr) |
| 551 | _ASN_ENCODE_FAILED; |
| 552 | |
| 553 | /* |
| 554 | * Figure out which CHOICE element is encoded. |
| 555 | */ |
| 556 | present = _fetch_present_idx(sptr, specs->pres_offset,specs->pres_size); |
| 557 | |
| 558 | if(present <= 0 || present > td->elements_count) { |
| 559 | _ASN_ENCODE_FAILED; |
| 560 | } else { |
| 561 | asn_enc_rval_t tmper; |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 562 | asn_TYPE_member_t *elm = &td->elements[present-1]; |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 563 | void *memb_ptr; |
| 564 | const char *mname = elm->name; |
| 565 | unsigned int mlen = strlen(mname); |
| 566 | |
| 567 | if(elm->flags & ATF_POINTER) { |
| 568 | memb_ptr = *(void **)((char *)sptr + elm->memb_offset); |
| 569 | if(!memb_ptr) _ASN_ENCODE_FAILED; |
| 570 | } else { |
| 571 | memb_ptr = (void *)((char *)sptr + elm->memb_offset); |
| 572 | } |
| 573 | |
| 574 | er.encoded = 0; |
| 575 | |
| 576 | if(!(flags & XER_F_CANONICAL)) _i_ASN_TEXT_INDENT(1, ilevel); |
| 577 | _ASN_CALLBACK3("<", 1, mname, mlen, ">", 1); |
| 578 | |
| 579 | tmper = elm->type->xer_encoder(elm->type, memb_ptr, |
| 580 | ilevel + 1, flags, cb, app_key); |
| 581 | if(tmper.encoded == -1) return tmper; |
| 582 | |
| 583 | _ASN_CALLBACK3("</", 2, mname, mlen, ">", 1); |
| 584 | |
| 585 | er.encoded += 5 + (2 * mlen) + tmper.encoded; |
| 586 | } |
| 587 | |
| 588 | if(!(flags & XER_F_CANONICAL)) _i_ASN_TEXT_INDENT(1, ilevel - 1); |
| 589 | |
| 590 | return er; |
Lev Walkin | 942fd08 | 2004-10-03 09:13:02 +0000 | [diff] [blame] | 591 | cb_failed: |
| 592 | _ASN_ENCODE_FAILED; |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 593 | } |
| 594 | |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 595 | int |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 596 | CHOICE_print(asn_TYPE_descriptor_t *td, const void *sptr, int ilevel, |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 597 | asn_app_consume_bytes_f *cb, void *app_key) { |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 598 | asn_CHOICE_specifics_t *specs = (asn_CHOICE_specifics_t *)td->specifics; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 599 | int present; |
| 600 | |
Lev Walkin | 8e8078a | 2004-09-26 13:10:40 +0000 | [diff] [blame] | 601 | if(!sptr) return (cb("<absent>", 8, app_key) < 0) ? -1 : 0; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 602 | |
| 603 | /* |
| 604 | * Figure out which CHOICE element is encoded. |
| 605 | */ |
| 606 | present = _fetch_present_idx(sptr, specs->pres_offset,specs->pres_size); |
| 607 | |
| 608 | /* |
Lev Walkin | a9cc46e | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 609 | * Print that element. |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 610 | */ |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 611 | if(present > 0 && present <= td->elements_count) { |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 612 | asn_TYPE_member_t *elm = &td->elements[present-1]; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 613 | const void *memb_ptr; |
| 614 | |
Lev Walkin | cc93b0f | 2004-09-10 09:18:20 +0000 | [diff] [blame] | 615 | if(elm->flags & ATF_POINTER) { |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 616 | memb_ptr = *(const void * const *)((const char *)sptr + elm->memb_offset); |
Lev Walkin | 8e8078a | 2004-09-26 13:10:40 +0000 | [diff] [blame] | 617 | if(!memb_ptr) return (cb("<absent>", 8, app_key) < 0) ? -1 : 0; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 618 | } else { |
| 619 | memb_ptr = (const void *)((const char *)sptr + elm->memb_offset); |
| 620 | } |
| 621 | |
| 622 | /* Print member's name and stuff */ |
Lev Walkin | cc6a910 | 2004-09-23 22:06:26 +0000 | [diff] [blame] | 623 | if(0) { |
Lev Walkin | 8e8078a | 2004-09-26 13:10:40 +0000 | [diff] [blame] | 624 | if(cb(elm->name, strlen(elm->name), app_key) < 0 |
| 625 | || cb(": ", 2, app_key) < 0) |
Lev Walkin | cc6a910 | 2004-09-23 22:06:26 +0000 | [diff] [blame] | 626 | return -1; |
| 627 | } |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 628 | |
| 629 | return elm->type->print_struct(elm->type, memb_ptr, ilevel, |
| 630 | cb, app_key); |
| 631 | } else { |
Lev Walkin | 8e8078a | 2004-09-26 13:10:40 +0000 | [diff] [blame] | 632 | return (cb("<absent>", 8, app_key) < 0) ? -1 : 0; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 633 | } |
| 634 | } |
| 635 | |
| 636 | void |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 637 | CHOICE_free(asn_TYPE_descriptor_t *td, void *ptr, int contents_only) { |
| 638 | asn_CHOICE_specifics_t *specs = (asn_CHOICE_specifics_t *)td->specifics; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 639 | int present; |
| 640 | |
| 641 | if(!td || !ptr) |
| 642 | return; |
| 643 | |
| 644 | ASN_DEBUG("Freeing %s as CHOICE", td->name); |
| 645 | |
| 646 | /* |
| 647 | * Figure out which CHOICE element is encoded. |
| 648 | */ |
| 649 | present = _fetch_present_idx(ptr, specs->pres_offset, specs->pres_size); |
| 650 | |
| 651 | /* |
| 652 | * Free that element. |
| 653 | */ |
Lev Walkin | 449f832 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 654 | if(present > 0 && present <= td->elements_count) { |
Lev Walkin | 5e03376 | 2004-09-29 13:26:15 +0000 | [diff] [blame] | 655 | asn_TYPE_member_t *elm = &td->elements[present-1]; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 656 | void *memb_ptr; |
| 657 | |
Lev Walkin | cc93b0f | 2004-09-10 09:18:20 +0000 | [diff] [blame] | 658 | if(elm->flags & ATF_POINTER) { |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 659 | memb_ptr = *(void **)((char *)ptr + elm->memb_offset); |
| 660 | if(memb_ptr) |
| 661 | elm->type->free_struct(elm->type, memb_ptr, 0); |
| 662 | } else { |
| 663 | memb_ptr = (void *)((char *)ptr + elm->memb_offset); |
| 664 | elm->type->free_struct(elm->type, memb_ptr, 1); |
| 665 | } |
| 666 | } |
| 667 | |
| 668 | if(!contents_only) { |
| 669 | FREEMEM(ptr); |
| 670 | } |
| 671 | } |
| 672 | |
| 673 | |
| 674 | /* |
| 675 | * The following functions functions offer protection against -fshort-enums, |
| 676 | * compatible with little- and big-endian machines. |
| 677 | * If assertion is triggered, either disable -fshort-enums, or add an entry |
| 678 | * here with the ->pres_size of your target stracture. |
| 679 | * Unless the target structure is packed, the ".present" member |
| 680 | * is guaranteed to be aligned properly. ASN.1 compiler itself does not |
| 681 | * produce packed code. |
| 682 | */ |
Lev Walkin | 91f5cd0 | 2004-08-11 09:10:59 +0000 | [diff] [blame] | 683 | static int |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 684 | _fetch_present_idx(const void *struct_ptr, int pres_offset, int pres_size) { |
| 685 | const void *present_ptr; |
| 686 | int present; |
| 687 | |
| 688 | present_ptr = ((const char *)struct_ptr) + pres_offset; |
| 689 | |
| 690 | switch(pres_size) { |
| 691 | case sizeof(int): present = *(const int *)present_ptr; break; |
| 692 | case sizeof(short): present = *(const short *)present_ptr; break; |
| 693 | case sizeof(char): present = *(const char *)present_ptr; break; |
| 694 | default: |
| 695 | /* ANSI C mandates enum to be equivalent to integer */ |
| 696 | assert(pres_size != sizeof(int)); |
| 697 | return 0; /* If not aborted, pass back safe value */ |
| 698 | } |
| 699 | |
| 700 | return present; |
| 701 | } |
| 702 | |
Lev Walkin | 91f5cd0 | 2004-08-11 09:10:59 +0000 | [diff] [blame] | 703 | static void |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 704 | _set_present_idx(void *struct_ptr, int pres_offset, int pres_size, int present) { |
| 705 | void *present_ptr; |
| 706 | present_ptr = ((char *)struct_ptr) + pres_offset; |
| 707 | |
| 708 | switch(pres_size) { |
| 709 | case sizeof(int): *(int *)present_ptr = present; break; |
| 710 | case sizeof(short): *(short *)present_ptr = present; break; |
| 711 | case sizeof(char): *(char *)present_ptr = present; break; |
| 712 | default: |
| 713 | /* ANSI C mandates enum to be equivalent to integer */ |
| 714 | assert(pres_size != sizeof(int)); |
| 715 | } |
| 716 | } |