| 351 | } |
| 352 | |
| 353 | static void |
| 354 | do_patch(priv_p privp, struct mbuf *m, int global_offset) |
| 355 | { |
| 356 | int i, offset, patched = 0; |
| 357 | union ng_patch_op_val val; |
| 358 | |
| 359 | for (i = 0; i < privp->conf->count; i++) { |
| 360 | offset = global_offset + privp->conf->ops[i].offset; |
| 361 | |
| 362 | if (offset + privp->conf->ops[i].length > m->m_pkthdr.len) |
| 363 | continue; |
| 364 | |
| 365 | /* for "=" operation we don't need to copy data from mbuf */ |
| 366 | if (privp->conf->ops[i].mode != NG_PATCH_MODE_SET) |
| 367 | m_copydata(m, offset, privp->conf->ops[i].length, (caddr_t) &val); |
| 368 | |
| 369 | switch (privp->conf->ops[i].length) |
| 370 | { |
| 371 | case 1: |
| 372 | switch (privp->conf->ops[i].mode) |
| 373 | { |
| 374 | case NG_PATCH_MODE_SET: |
| 375 | val.v1 = privp->conf->ops[i].val.v1; |
| 376 | break; |
| 377 | case NG_PATCH_MODE_ADD: |
| 378 | val.v1 += privp->conf->ops[i].val.v1; |
| 379 | break; |
| 380 | case NG_PATCH_MODE_SUB: |
| 381 | val.v1 -= privp->conf->ops[i].val.v1; |
| 382 | break; |
| 383 | case NG_PATCH_MODE_MUL: |
| 384 | val.v1 *= privp->conf->ops[i].val.v1; |
| 385 | break; |
| 386 | case NG_PATCH_MODE_DIV: |
| 387 | val.v1 /= privp->conf->ops[i].val.v1; |
| 388 | break; |
| 389 | case NG_PATCH_MODE_NEG: |
| 390 | *((int8_t *) &val) = - *((int8_t *) &val); |
| 391 | break; |
| 392 | case NG_PATCH_MODE_AND: |
| 393 | val.v1 &= privp->conf->ops[i].val.v1; |
| 394 | break; |
| 395 | case NG_PATCH_MODE_OR: |
| 396 | val.v1 |= privp->conf->ops[i].val.v1; |
| 397 | break; |
| 398 | case NG_PATCH_MODE_XOR: |
| 399 | val.v1 ^= privp->conf->ops[i].val.v1; |
| 400 | break; |
| 401 | case NG_PATCH_MODE_SHL: |
| 402 | val.v1 <<= privp->conf->ops[i].val.v1; |
| 403 | break; |
| 404 | case NG_PATCH_MODE_SHR: |
| 405 | val.v1 >>= privp->conf->ops[i].val.v1; |
| 406 | break; |
| 407 | } |
| 408 | break; |
| 409 | |
| 410 | case 2: |
no test coverage detected