vlm | fa67ddc | 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 | */ |
vlm | 39ba4c4 | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 5 | #include <asn_internal.h> |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 6 | #include <constr_SEQUENCE.h> |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 7 | #include <assert.h> |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 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 | */ |
vlm | c519061 | 2004-08-18 04:53:32 +0000 | [diff] [blame] | 14 | #define LEFT ((size<(size_t)ctx->left)?size:(size_t)ctx->left) |
vlm | fa67ddc | 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 | */ |
vlm | b42843a | 2004-06-05 08:17:50 +0000 | [diff] [blame] | 27 | #define SIZE_VIOLATION (ctx->left >= 0 && (size_t)ctx->left <= size) |
vlm | fa67ddc | 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 | */ |
| 33 | #define ADVANCE(num_bytes) do { \ |
| 34 | size_t num = num_bytes; \ |
vlm | d86c925 | 2004-08-25 01:34:11 +0000 | [diff] [blame] | 35 | ptr = ((char *)ptr) + num; \ |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 36 | size -= num; \ |
| 37 | if(ctx->left >= 0) \ |
| 38 | ctx->left -= num; \ |
| 39 | consumed_myself += num; \ |
| 40 | } while(0) |
| 41 | |
| 42 | /* |
| 43 | * Switch to the next phase of parsing. |
| 44 | */ |
| 45 | #define NEXT_PHASE(ctx) do { \ |
| 46 | ctx->phase++; \ |
| 47 | ctx->step = 0; \ |
| 48 | } while(0) |
| 49 | #define PHASE_OUT(ctx) do { ctx->phase = 10; } while(0) |
| 50 | |
| 51 | /* |
| 52 | * Return a standardized complex structure. |
| 53 | */ |
| 54 | #define RETURN(_code) do { \ |
| 55 | rval.code = _code; \ |
| 56 | rval.consumed = consumed_myself;\ |
| 57 | return rval; \ |
| 58 | } while(0) |
| 59 | |
| 60 | /* |
| 61 | * Check whether we are inside the extensions group. |
| 62 | */ |
| 63 | #define IN_EXTENSION_GROUP(specs, memb_idx) \ |
| 64 | ( ((memb_idx) > (specs)->ext_after) \ |
| 65 | &&((memb_idx) < (specs)->ext_before)) |
| 66 | |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 67 | |
| 68 | /* |
| 69 | * Tags are canonically sorted in the tag2element map. |
| 70 | */ |
| 71 | static int |
| 72 | _t2e_cmp(const void *ap, const void *bp) { |
vlm | da67468 | 2004-08-11 09:07:36 +0000 | [diff] [blame] | 73 | const asn1_TYPE_tag2member_t *a = (const asn1_TYPE_tag2member_t *)ap; |
| 74 | const asn1_TYPE_tag2member_t *b = (const asn1_TYPE_tag2member_t *)bp; |
| 75 | |
vlm | 3147308 | 2004-06-06 07:20:02 +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 | |
vlm | 1692da0 | 2004-06-14 13:42:23 +0000 | [diff] [blame] | 83 | if(a_value == b_value) { |
vlm | e4ee6ee | 2004-06-14 14:11:14 +0000 | [diff] [blame] | 84 | if(a->el_no > b->el_no) |
| 85 | return 1; |
vlm | 1692da0 | 2004-06-14 13:42:23 +0000 | [diff] [blame] | 86 | /* |
| 87 | * Important: we do not check |
vlm | e4ee6ee | 2004-06-14 14:11:14 +0000 | [diff] [blame] | 88 | * for a->el_no <= b->el_no! |
vlm | 1692da0 | 2004-06-14 13:42:23 +0000 | [diff] [blame] | 89 | */ |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 90 | return 0; |
vlm | 1692da0 | 2004-06-14 13:42:23 +0000 | [diff] [blame] | 91 | } else if(a_value < b_value) |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 92 | return -1; |
| 93 | else |
| 94 | return 1; |
| 95 | } else if(a_class < b_class) { |
| 96 | return -1; |
| 97 | } else { |
| 98 | return 1; |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 103 | /* |
| 104 | * The decoder of the SEQUENCE type. |
| 105 | */ |
| 106 | ber_dec_rval_t |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 107 | SEQUENCE_decode_ber(asn1_TYPE_descriptor_t *td, |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 108 | void **struct_ptr, void *ptr, size_t size, int tag_mode) { |
| 109 | /* |
| 110 | * Bring closer parts of structure description. |
| 111 | */ |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 112 | asn1_SEQUENCE_specifics_t *specs = (asn1_SEQUENCE_specifics_t *)td->specifics; |
| 113 | asn1_TYPE_member_t *elements = td->elements; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 114 | |
| 115 | /* |
| 116 | * Parts of the structure being constructed. |
| 117 | */ |
| 118 | void *st = *struct_ptr; /* Target structure. */ |
| 119 | ber_dec_ctx_t *ctx; /* Decoder context */ |
| 120 | |
| 121 | ber_tlv_tag_t tlv_tag; /* T from TLV */ |
| 122 | //ber_tlv_len_t tlv_len; /* L from TLV */ |
| 123 | ber_dec_rval_t rval; /* Return code from subparsers */ |
| 124 | |
| 125 | ssize_t consumed_myself = 0; /* Consumed bytes from ptr */ |
| 126 | int edx; /* SEQUENCE element's index */ |
| 127 | |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 128 | ASN_DEBUG("Decoding %s as SEQUENCE", td->name); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 129 | |
| 130 | /* |
| 131 | * Create the target structure if it is not present already. |
| 132 | */ |
| 133 | if(st == 0) { |
| 134 | st = *struct_ptr = CALLOC(1, specs->struct_size); |
| 135 | if(st == 0) { |
| 136 | RETURN(RC_FAIL); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | /* |
| 141 | * Restore parsing context. |
| 142 | */ |
vlm | 1ff928d | 2004-08-11 08:10:13 +0000 | [diff] [blame] | 143 | ctx = (ber_dec_ctx_t *)((char *)st + specs->ctx_offset); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 144 | |
| 145 | /* |
| 146 | * Start to parse where left previously |
| 147 | */ |
| 148 | switch(ctx->phase) { |
| 149 | case 0: |
| 150 | /* |
| 151 | * PHASE 0. |
| 152 | * Check that the set of tags associated with given structure |
| 153 | * perfectly fits our expectations. |
| 154 | */ |
| 155 | |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 156 | rval = ber_check_tags(td, ctx, ptr, size, |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 157 | tag_mode, &ctx->left, 0); |
| 158 | if(rval.code != RC_OK) { |
| 159 | ASN_DEBUG("%s tagging check failed: %d", |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 160 | td->name, rval.code); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 161 | consumed_myself += rval.consumed; |
| 162 | RETURN(rval.code); |
| 163 | } |
| 164 | |
| 165 | if(ctx->left >= 0) |
| 166 | ctx->left += rval.consumed; /* ?Substracted below! */ |
| 167 | ADVANCE(rval.consumed); |
| 168 | |
| 169 | NEXT_PHASE(ctx); |
| 170 | |
| 171 | ASN_DEBUG("Structure consumes %ld bytes, buffer %ld", |
| 172 | (long)ctx->left, (long)size); |
| 173 | |
| 174 | /* Fall through */ |
| 175 | case 1: |
| 176 | /* |
| 177 | * PHASE 1. |
| 178 | * From the place where we've left it previously, |
| 179 | * try to decode the next member from the list of |
| 180 | * this structure's elements. |
| 181 | * (ctx->step) stores the member being processed |
| 182 | * between invocations and the microphase {0,1} of parsing |
| 183 | * that member: |
| 184 | * step = (<member_number> * 2 + <microphase>). |
| 185 | */ |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 186 | for(edx = (ctx->step >> 1); edx < td->elements_count; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 187 | edx++, ctx->step = (ctx->step & ~1) + 2) { |
| 188 | void *memb_ptr; /* Pointer to the member */ |
vlm | da67468 | 2004-08-11 09:07:36 +0000 | [diff] [blame] | 189 | void **memb_ptr2; /* Pointer to that pointer */ |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 190 | ssize_t tag_len; /* Length of TLV's T */ |
| 191 | int opt_edx_end; /* Next non-optional element */ |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 192 | int use_bsearch; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 193 | int n; |
| 194 | |
| 195 | if(ctx->step & 1) |
| 196 | goto microphase2; |
| 197 | |
| 198 | /* |
| 199 | * MICROPHASE 1: Synchronize decoding. |
| 200 | */ |
vlm | ddd5a7d | 2004-09-10 09:18:20 +0000 | [diff] [blame] | 201 | ASN_DEBUG("In %s SEQUENCE left %d, edx=%d flags=%d" |
| 202 | " opt=%d ec=%d", |
| 203 | td->name, (int)ctx->left, edx, |
| 204 | elements[edx].flags, elements[edx].optional, |
| 205 | td->elements_count); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 206 | |
| 207 | if(ctx->left == 0 /* No more stuff is expected */ |
| 208 | && ( |
| 209 | /* Explicit OPTIONAL specification reaches the end */ |
vlm | ddd5a7d | 2004-09-10 09:18:20 +0000 | [diff] [blame] | 210 | (edx + elements[edx].optional |
| 211 | == td->elements_count) |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 212 | || |
| 213 | /* All extensions are optional */ |
| 214 | (IN_EXTENSION_GROUP(specs, edx) |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 215 | && specs->ext_before > td->elements_count) |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 216 | ) |
| 217 | ) { |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 218 | ASN_DEBUG("End of SEQUENCE %s", td->name); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 219 | /* |
| 220 | * Found the legitimate end of the structure. |
| 221 | */ |
| 222 | PHASE_OUT(ctx); |
| 223 | RETURN(RC_OK); |
| 224 | } |
| 225 | |
| 226 | /* |
| 227 | * Fetch the T from TLV. |
| 228 | */ |
| 229 | tag_len = ber_fetch_tag(ptr, LEFT, &tlv_tag); |
vlm | 1308d2b | 2004-09-10 15:49:15 +0000 | [diff] [blame] | 230 | ASN_DEBUG("Current tag in %s SEQUENCE for element %d " |
| 231 | "(%s) is %s encoded in %d bytes, left %ld", |
| 232 | td->name, edx, elements[edx].name, |
| 233 | ber_tlv_tag_string(tlv_tag), (int)tag_len, (long)LEFT); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 234 | switch(tag_len) { |
| 235 | case 0: if(!SIZE_VIOLATION) RETURN(RC_WMORE); |
| 236 | /* Fall through */ |
| 237 | case -1: RETURN(RC_FAIL); |
| 238 | } |
| 239 | |
| 240 | /* |
| 241 | * Find the next available type with this tag. |
| 242 | */ |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 243 | use_bsearch = 0; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 244 | opt_edx_end = edx + elements[edx].optional + 1; |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 245 | if(opt_edx_end > td->elements_count) |
| 246 | opt_edx_end = td->elements_count; /* Cap */ |
vlm | 5d219bf | 2004-07-01 00:48:04 +0000 | [diff] [blame] | 247 | else if(opt_edx_end - edx > 8) { |
vlm | 1692da0 | 2004-06-14 13:42:23 +0000 | [diff] [blame] | 248 | /* Limit the scope of linear search... */ |
vlm | 5d219bf | 2004-07-01 00:48:04 +0000 | [diff] [blame] | 249 | opt_edx_end = edx + 8; |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 250 | use_bsearch = 1; |
vlm | 1692da0 | 2004-06-14 13:42:23 +0000 | [diff] [blame] | 251 | /* ... and resort to bsearch() */ |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 252 | } |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 253 | for(n = edx; n < opt_edx_end; n++) { |
| 254 | if(BER_TAGS_EQUAL(tlv_tag, elements[n].tag)) { |
| 255 | /* |
| 256 | * Found element corresponding to the tag |
| 257 | * being looked at. |
| 258 | * Reposition over the right element. |
| 259 | */ |
| 260 | edx = n; |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 261 | ctx->step = 1 + 2 * edx; /* Remember! */ |
| 262 | goto microphase2; |
vlm | 060fe2a | 2004-09-10 09:37:12 +0000 | [diff] [blame] | 263 | } else if(elements[n].flags & ATF_OPEN_TYPE) { |
| 264 | /* |
| 265 | * This is the ANY type, which may bear |
| 266 | * any flag whatsoever. |
| 267 | */ |
| 268 | edx = n; |
| 269 | ctx->step = 1 + 2 * edx; /* Remember! */ |
| 270 | goto microphase2; |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 271 | } else if(elements[n].tag == (ber_tlv_tag_t)-1) { |
| 272 | use_bsearch = 1; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 273 | break; |
| 274 | } |
| 275 | } |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 276 | if(use_bsearch) { |
| 277 | /* |
vlm | 141874a | 2004-09-04 06:17:35 +0000 | [diff] [blame] | 278 | * Resort to a binary search over |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 279 | * sorted array of tags. |
| 280 | */ |
| 281 | asn1_TYPE_tag2member_t *t2m; |
| 282 | asn1_TYPE_tag2member_t key; |
| 283 | key.el_tag = tlv_tag; |
vlm | 1692da0 | 2004-06-14 13:42:23 +0000 | [diff] [blame] | 284 | key.el_no = edx; |
vlm | da67468 | 2004-08-11 09:07:36 +0000 | [diff] [blame] | 285 | (void *)t2m = bsearch(&key, |
| 286 | specs->tag2el, specs->tag2el_count, |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 287 | sizeof(specs->tag2el[0]), _t2e_cmp); |
vlm | 1692da0 | 2004-06-14 13:42:23 +0000 | [diff] [blame] | 288 | if(t2m) { |
| 289 | asn1_TYPE_tag2member_t *best = 0; |
| 290 | asn1_TYPE_tag2member_t *t2m_f, *t2m_l; |
| 291 | int edx_max = edx + elements[edx].optional; |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 292 | /* |
| 293 | * Rewind to the first element with that tag, |
| 294 | * `cause bsearch() does not guarantee order. |
| 295 | */ |
vlm | 1692da0 | 2004-06-14 13:42:23 +0000 | [diff] [blame] | 296 | t2m_f = t2m + t2m->toff_first; |
| 297 | t2m_l = t2m + t2m->toff_last; |
| 298 | for(t2m = t2m_f; t2m <= t2m_l; t2m++) { |
| 299 | if(t2m->el_no > edx_max) break; |
| 300 | if(t2m->el_no < edx) continue; |
| 301 | best = t2m; |
| 302 | } |
| 303 | if(best) { |
| 304 | edx = best->el_no; |
| 305 | ctx->step = 1 + 2 * edx; |
| 306 | goto microphase2; |
| 307 | } |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 308 | } |
| 309 | n = opt_edx_end; |
| 310 | } |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 311 | if(n == opt_edx_end) { |
| 312 | /* |
| 313 | * If tag is unknown, it may be either |
| 314 | * an unknown (thus, incorrect) tag, |
| 315 | * or an extension (...), |
| 316 | * or an end of the indefinite-length structure. |
| 317 | */ |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 318 | if(!IN_EXTENSION_GROUP(specs, edx)) { |
| 319 | ASN_DEBUG("Unexpected tag %s", |
| 320 | ber_tlv_tag_string(tlv_tag)); |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 321 | ASN_DEBUG("Expected tag %s (%s)%s", |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 322 | ber_tlv_tag_string(elements[edx].tag), |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 323 | elements[edx].name, |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 324 | elements[edx].optional |
| 325 | ?" or alternatives":""); |
| 326 | RETURN(RC_FAIL); |
| 327 | } |
| 328 | |
| 329 | if(ctx->left < 0 |
| 330 | && ((uint8_t *)ptr)[0] == 0) { |
| 331 | if(LEFT < 2) { |
| 332 | if(SIZE_VIOLATION) |
| 333 | RETURN(RC_FAIL); |
| 334 | else |
| 335 | RETURN(RC_WMORE); |
| 336 | } else if(((uint8_t *)ptr)[1] == 0) { |
| 337 | /* |
| 338 | * Yeah, baby! Found the terminator |
| 339 | * of the indefinite length structure. |
| 340 | */ |
| 341 | /* |
| 342 | * Proceed to the canonical |
| 343 | * finalization function. |
| 344 | * No advancing is necessary. |
| 345 | */ |
| 346 | goto phase3; |
| 347 | } |
| 348 | } else { |
| 349 | /* Skip this tag */ |
| 350 | ssize_t skip; |
| 351 | |
| 352 | skip = ber_skip_length( |
| 353 | BER_TLV_CONSTRUCTED(ptr), |
vlm | 1ff928d | 2004-08-11 08:10:13 +0000 | [diff] [blame] | 354 | (char *)ptr + tag_len, LEFT - tag_len); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 355 | ASN_DEBUG("Skip length %d in %s", |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 356 | (int)skip, td->name); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 357 | switch(skip) { |
| 358 | case 0: if(!SIZE_VIOLATION) RETURN(RC_WMORE); |
| 359 | /* Fall through */ |
| 360 | case -1: RETURN(RC_FAIL); |
| 361 | } |
| 362 | |
| 363 | ADVANCE(skip + tag_len); |
| 364 | ctx->step -= 2; |
| 365 | edx--; |
| 366 | continue; /* Try again with the next tag */ |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | /* |
| 371 | * MICROPHASE 2: Invoke the member-specific decoder. |
| 372 | */ |
| 373 | ctx->step |= 1; /* Confirm entering next microphase */ |
| 374 | microphase2: |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 375 | ASN_DEBUG("Inside SEQUENCE %s MF2", td->name); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 376 | |
| 377 | /* |
| 378 | * Compute the position of the member inside a structure, |
| 379 | * and also a type of containment (it may be contained |
| 380 | * as pointer or using inline inclusion). |
| 381 | */ |
vlm | ddd5a7d | 2004-09-10 09:18:20 +0000 | [diff] [blame] | 382 | if(elements[edx].flags & ATF_POINTER) { |
| 383 | /* Member is a pointer to another structure */ |
vlm | da67468 | 2004-08-11 09:07:36 +0000 | [diff] [blame] | 384 | memb_ptr2 = (void **)((char *)st + elements[edx].memb_offset); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 385 | } else { |
| 386 | /* |
| 387 | * A pointer to a pointer |
| 388 | * holding the start of the structure |
| 389 | */ |
| 390 | memb_ptr = (char *)st + elements[edx].memb_offset; |
| 391 | memb_ptr2 = &memb_ptr; |
| 392 | } |
| 393 | /* |
| 394 | * Invoke the member fetch routine according to member's type |
| 395 | */ |
| 396 | rval = elements[edx].type->ber_decoder( |
vlm | da67468 | 2004-08-11 09:07:36 +0000 | [diff] [blame] | 397 | elements[edx].type, |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 398 | memb_ptr2, ptr, LEFT, |
| 399 | elements[edx].tag_mode); |
vlm | ef16e8c | 2004-09-04 04:44:11 +0000 | [diff] [blame] | 400 | ASN_DEBUG("In %s SEQUENCE decoded %d %s of %d " |
| 401 | "in %d bytes rval.code %d", |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 402 | td->name, edx, elements[edx].type->name, |
vlm | ef16e8c | 2004-09-04 04:44:11 +0000 | [diff] [blame] | 403 | (int)LEFT, (int)rval.consumed, rval.code); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 404 | switch(rval.code) { |
| 405 | case RC_OK: |
| 406 | break; |
| 407 | case RC_WMORE: /* More data expected */ |
| 408 | if(!SIZE_VIOLATION) { |
| 409 | ADVANCE(rval.consumed); |
| 410 | RETURN(RC_WMORE); |
| 411 | } |
| 412 | /* Fall through */ |
| 413 | case RC_FAIL: /* Fatal error */ |
| 414 | RETURN(RC_FAIL); |
| 415 | } /* switch(rval) */ |
| 416 | |
| 417 | ADVANCE(rval.consumed); |
| 418 | } /* for(all structure members) */ |
| 419 | |
| 420 | phase3: |
| 421 | ctx->phase = 3; |
| 422 | case 3: /* 00 and other tags expected */ |
| 423 | case 4: /* only 00's expected */ |
| 424 | |
| 425 | ASN_DEBUG("SEQUENCE %s Leftover: %ld, size = %ld", |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 426 | td->name, (long)ctx->left, (long)size); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 427 | |
| 428 | /* |
| 429 | * Skip everything until the end of the SEQUENCE. |
| 430 | */ |
| 431 | while(ctx->left) { |
| 432 | ssize_t tl, ll; |
| 433 | |
| 434 | tl = ber_fetch_tag(ptr, LEFT, &tlv_tag); |
| 435 | switch(tl) { |
| 436 | case 0: if(!SIZE_VIOLATION) RETURN(RC_WMORE); |
| 437 | /* Fall through */ |
| 438 | case -1: RETURN(RC_FAIL); |
| 439 | } |
| 440 | |
| 441 | /* |
| 442 | * If expected <0><0>... |
| 443 | */ |
| 444 | if(ctx->left < 0 |
| 445 | && ((uint8_t *)ptr)[0] == 0) { |
| 446 | if(LEFT < 2) { |
| 447 | if(SIZE_VIOLATION) |
| 448 | RETURN(RC_FAIL); |
| 449 | else |
| 450 | RETURN(RC_WMORE); |
| 451 | } else if(((uint8_t *)ptr)[1] == 0) { |
| 452 | /* |
| 453 | * Correctly finished with <0><0>. |
| 454 | */ |
| 455 | ADVANCE(2); |
| 456 | ctx->left++; |
| 457 | ctx->phase = 4; |
| 458 | continue; |
| 459 | } |
| 460 | } |
| 461 | |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 462 | if(!IN_EXTENSION_GROUP(specs, td->elements_count) |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 463 | || ctx->phase == 4) { |
| 464 | ASN_DEBUG("Unexpected continuation " |
| 465 | "of a non-extensible type " |
| 466 | "%s (SEQUENCE): %s", |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 467 | td->name, |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 468 | ber_tlv_tag_string(tlv_tag)); |
| 469 | RETURN(RC_FAIL); |
| 470 | } |
| 471 | |
| 472 | ll = ber_skip_length( |
| 473 | BER_TLV_CONSTRUCTED(ptr), |
vlm | 1ff928d | 2004-08-11 08:10:13 +0000 | [diff] [blame] | 474 | (char *)ptr + tl, LEFT - tl); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 475 | switch(ll) { |
| 476 | case 0: if(!SIZE_VIOLATION) RETURN(RC_WMORE); |
| 477 | /* Fall through */ |
| 478 | case -1: RETURN(RC_FAIL); |
| 479 | } |
| 480 | |
| 481 | ADVANCE(tl + ll); |
| 482 | } |
| 483 | |
| 484 | PHASE_OUT(ctx); |
| 485 | } |
| 486 | |
| 487 | RETURN(RC_OK); |
| 488 | } |
| 489 | |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 490 | |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 491 | /* |
| 492 | * The DER encoder of the SEQUENCE type. |
| 493 | */ |
vlm | 39ba4c4 | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 494 | asn_enc_rval_t |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 495 | SEQUENCE_encode_der(asn1_TYPE_descriptor_t *td, |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 496 | void *ptr, int tag_mode, ber_tlv_tag_t tag, |
| 497 | asn_app_consume_bytes_f *cb, void *app_key) { |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 498 | size_t computed_size = 0; |
vlm | 39ba4c4 | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 499 | asn_enc_rval_t erval; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 500 | ssize_t ret; |
| 501 | int edx; |
| 502 | |
| 503 | ASN_DEBUG("%s %s as SEQUENCE", |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 504 | cb?"Encoding":"Estimating", td->name); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 505 | |
| 506 | /* |
| 507 | * Gather the length of the underlying members sequence. |
| 508 | */ |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 509 | for(edx = 0; edx < td->elements_count; edx++) { |
| 510 | asn1_TYPE_member_t *elm = &td->elements[edx]; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 511 | void *memb_ptr; |
vlm | ddd5a7d | 2004-09-10 09:18:20 +0000 | [diff] [blame] | 512 | if(elm->flags & ATF_POINTER) { |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 513 | memb_ptr = *(void **)((char *)ptr + elm->memb_offset); |
| 514 | if(!memb_ptr) continue; |
| 515 | } else { |
| 516 | memb_ptr = (void *)((char *)ptr + elm->memb_offset); |
| 517 | } |
| 518 | erval = elm->type->der_encoder(elm->type, memb_ptr, |
| 519 | elm->tag_mode, elm->tag, |
| 520 | 0, 0); |
| 521 | if(erval.encoded == -1) |
| 522 | return erval; |
| 523 | computed_size += erval.encoded; |
| 524 | ASN_DEBUG("Member %d %s estimated %ld bytes", |
| 525 | edx, elm->name, (long)erval.encoded); |
| 526 | } |
| 527 | |
| 528 | /* |
| 529 | * Encode the TLV for the sequence itself. |
| 530 | */ |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 531 | ret = der_write_tags(td, computed_size, tag_mode, tag, cb, app_key); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 532 | ASN_DEBUG("Wrote tags: %ld (+%ld)", (long)ret, (long)computed_size); |
| 533 | if(ret == -1) { |
| 534 | erval.encoded = -1; |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 535 | erval.failed_type = td; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 536 | erval.structure_ptr = ptr; |
| 537 | return erval; |
| 538 | } |
| 539 | erval.encoded = computed_size + ret; |
| 540 | |
| 541 | if(!cb) return erval; |
| 542 | |
| 543 | /* |
| 544 | * Encode all members. |
| 545 | */ |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 546 | for(edx = 0; edx < td->elements_count; edx++) { |
| 547 | asn1_TYPE_member_t *elm = &td->elements[edx]; |
vlm | 39ba4c4 | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 548 | asn_enc_rval_t tmperval; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 549 | void *memb_ptr; |
| 550 | |
vlm | ddd5a7d | 2004-09-10 09:18:20 +0000 | [diff] [blame] | 551 | if(elm->flags & ATF_POINTER) { |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 552 | memb_ptr = *(void **)((char *)ptr + elm->memb_offset); |
| 553 | if(!memb_ptr) continue; |
| 554 | } else { |
| 555 | memb_ptr = (void *)((char *)ptr + elm->memb_offset); |
| 556 | } |
| 557 | tmperval = elm->type->der_encoder(elm->type, memb_ptr, |
| 558 | elm->tag_mode, elm->tag, |
| 559 | cb, app_key); |
| 560 | if(tmperval.encoded == -1) |
| 561 | return tmperval; |
| 562 | computed_size -= tmperval.encoded; |
| 563 | ASN_DEBUG("Member %d %s of SEQUENCE %s encoded in %d bytes", |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 564 | edx, elm->name, td->name, tmperval.encoded); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 565 | } |
| 566 | |
| 567 | if(computed_size != 0) { |
| 568 | /* |
| 569 | * Encoded size is not equal to the computed size. |
| 570 | */ |
| 571 | erval.encoded = -1; |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 572 | erval.failed_type = td; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 573 | erval.structure_ptr = ptr; |
| 574 | } |
| 575 | |
| 576 | return erval; |
| 577 | } |
| 578 | |
vlm | 39ba4c4 | 2004-09-22 16:06:28 +0000 | [diff] [blame] | 579 | asn_enc_rval_t |
| 580 | SEQUENCE_encode_xer(asn1_TYPE_descriptor_t *td, void *sptr, |
| 581 | int ilevel, enum xer_encoder_flags_e flags, |
| 582 | asn_app_consume_bytes_f *cb, void *app_key) { |
| 583 | asn_enc_rval_t er; |
| 584 | int xcan = (flags & XER_F_CANONICAL); |
| 585 | int edx; |
| 586 | |
| 587 | if(!sptr) |
| 588 | _ASN_ENCODE_FAILED; |
| 589 | |
| 590 | er.encoded = 0; |
| 591 | |
| 592 | for(edx = 0; edx < td->elements_count; edx++) { |
| 593 | asn_enc_rval_t tmper; |
| 594 | asn1_TYPE_member_t *elm = &td->elements[edx]; |
| 595 | void *memb_ptr; |
| 596 | const char *mname = elm->name; |
| 597 | unsigned int mlen = strlen(mname); |
| 598 | |
| 599 | if(elm->flags & ATF_POINTER) { |
| 600 | memb_ptr = *(void **)((char *)sptr + elm->memb_offset); |
| 601 | if(!memb_ptr) continue; /* OPTIONAL element? */ |
| 602 | } else { |
| 603 | memb_ptr = (void *)((char *)sptr + elm->memb_offset); |
| 604 | } |
| 605 | |
| 606 | if(!xcan) _i_ASN_TEXT_INDENT(1, ilevel); |
| 607 | _ASN_CALLBACK3("<", 1, mname, mlen, ">", 1); |
| 608 | |
| 609 | /* Print the member itself */ |
| 610 | tmper = elm->type->xer_encoder(elm->type, memb_ptr, |
| 611 | ilevel + 1, flags, cb, app_key); |
| 612 | if(tmper.encoded == -1) return tmper; |
| 613 | |
| 614 | _ASN_CALLBACK3("</", 2, mname, mlen, ">", 1); |
| 615 | er.encoded += 5 + (2 * mlen) + tmper.encoded; |
| 616 | } |
| 617 | |
| 618 | if(!xcan) _i_ASN_TEXT_INDENT(1, ilevel - 1); |
| 619 | |
| 620 | return er; |
| 621 | } |
| 622 | |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 623 | int |
| 624 | SEQUENCE_print(asn1_TYPE_descriptor_t *td, const void *sptr, int ilevel, |
| 625 | asn_app_consume_bytes_f *cb, void *app_key) { |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 626 | int edx; |
| 627 | int ret; |
| 628 | |
| 629 | if(!sptr) return cb("<absent>", 8, app_key); |
| 630 | |
| 631 | /* Dump preamble */ |
| 632 | if(cb(td->name, strlen(td->name), app_key) |
| 633 | || cb(" ::= {\n", 7, app_key)) |
| 634 | return -1; |
| 635 | |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 636 | for(edx = 0; edx < td->elements_count; edx++) { |
| 637 | asn1_TYPE_member_t *elm = &td->elements[edx]; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 638 | const void *memb_ptr; |
| 639 | |
vlm | ddd5a7d | 2004-09-10 09:18:20 +0000 | [diff] [blame] | 640 | if(elm->flags & ATF_POINTER) { |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 641 | memb_ptr = *(const void * const *)((const char *)sptr + elm->memb_offset); |
| 642 | if(!memb_ptr) continue; |
| 643 | } else { |
| 644 | memb_ptr = (const void *)((const char *)sptr + elm->memb_offset); |
| 645 | } |
| 646 | |
| 647 | /* Indentation */ |
| 648 | for(ret = 0; ret < ilevel; ret++) cb(" ", 1, app_key); |
| 649 | |
| 650 | /* Print the member's name and stuff */ |
| 651 | if(cb(elm->name, strlen(elm->name), app_key) |
| 652 | || cb(": ", 2, app_key)) |
| 653 | return -1; |
| 654 | |
| 655 | /* Print the member itself */ |
| 656 | ret = elm->type->print_struct(elm->type, memb_ptr, ilevel + 4, |
| 657 | cb, app_key); |
| 658 | if(ret) return ret; |
| 659 | |
| 660 | /* Print out the terminator */ |
| 661 | ret = cb("\n", 1, app_key); |
| 662 | if(ret) return ret; |
| 663 | } |
| 664 | |
| 665 | /* Indentation */ |
| 666 | for(ret = 0; ret < ilevel - 4; ret++) cb(" ", 1, app_key); |
| 667 | |
| 668 | return cb("}", 1, app_key); |
| 669 | } |
| 670 | |
| 671 | void |
| 672 | SEQUENCE_free(asn1_TYPE_descriptor_t *td, void *sptr, int contents_only) { |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 673 | int edx; |
| 674 | |
| 675 | if(!td || !sptr) |
| 676 | return; |
| 677 | |
| 678 | ASN_DEBUG("Freeing %s as SEQUENCE", td->name); |
| 679 | |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 680 | for(edx = 0; edx < td->elements_count; edx++) { |
| 681 | asn1_TYPE_member_t *elm = &td->elements[edx]; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 682 | void *memb_ptr; |
vlm | ddd5a7d | 2004-09-10 09:18:20 +0000 | [diff] [blame] | 683 | if(elm->flags & ATF_POINTER) { |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 684 | memb_ptr = *(void **)((char *)sptr + elm->memb_offset); |
| 685 | if(memb_ptr) |
| 686 | elm->type->free_struct(elm->type, memb_ptr, 0); |
| 687 | } else { |
| 688 | memb_ptr = (void *)((char *)sptr + elm->memb_offset); |
| 689 | elm->type->free_struct(elm->type, memb_ptr, 1); |
| 690 | } |
| 691 | } |
| 692 | |
| 693 | if(!contents_only) { |
| 694 | FREEMEM(sptr); |
| 695 | } |
| 696 | } |
| 697 | |
| 698 | int |
| 699 | SEQUENCE_constraint(asn1_TYPE_descriptor_t *td, const void *sptr, |
| 700 | asn_app_consume_bytes_f *app_errlog, void *app_key) { |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 701 | int edx; |
| 702 | |
| 703 | if(!sptr) { |
vlm | e3f0f28 | 2004-08-11 09:44:13 +0000 | [diff] [blame] | 704 | _ASN_ERRLOG(app_errlog, app_key, |
vlm | 758530a | 2004-08-22 13:47:59 +0000 | [diff] [blame] | 705 | "%s: value not given (%s:%d)", |
| 706 | td->name, __FILE__, __LINE__); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 707 | return -1; |
| 708 | } |
| 709 | |
| 710 | /* |
| 711 | * Iterate over structure members and check their validity. |
| 712 | */ |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 713 | for(edx = 0; edx < td->elements_count; edx++) { |
| 714 | asn1_TYPE_member_t *elm = &td->elements[edx]; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 715 | const void *memb_ptr; |
| 716 | |
vlm | ddd5a7d | 2004-09-10 09:18:20 +0000 | [diff] [blame] | 717 | if(elm->flags & ATF_POINTER) { |
vlm | 3147308 | 2004-06-06 07:20:02 +0000 | [diff] [blame] | 718 | memb_ptr = *(const void * const *)((const char *)sptr + elm->memb_offset); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 719 | if(!memb_ptr) continue; |
| 720 | } else { |
| 721 | memb_ptr = (const void *)((const char *)sptr + elm->memb_offset); |
| 722 | } |
| 723 | |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 724 | if(elm->memb_constraints) { |
| 725 | int ret = elm->memb_constraints(elm->type, memb_ptr, |
| 726 | app_errlog, app_key); |
| 727 | if(ret) return ret; |
| 728 | } else { |
| 729 | int ret = elm->type->check_constraints(elm->type, |
| 730 | memb_ptr, app_errlog, app_key); |
| 731 | if(ret) return ret; |
| 732 | /* |
| 733 | * Cannot inherit it earlier: |
| 734 | * need to make sure we get the updated version. |
| 735 | */ |
| 736 | elm->memb_constraints = elm->type->check_constraints; |
| 737 | } |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 738 | } |
| 739 | |
| 740 | return 0; |
| 741 | } |