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| Rev 4053 | Rev 4258 | ||
|---|---|---|---|
| Line 317... | Line 317... | ||
| 317 | .has_fragments: |
317 | .has_fragments: |
| 318 | movzx eax, [edx + IPv4_header.FlagsAndFragmentOffset] |
318 | movzx eax, [edx + IPv4_header.FlagsAndFragmentOffset] |
| 319 | xchg al, ah |
319 | xchg al, ah |
| 320 | shl ax, 3 |
320 | shl ax, 3 |
| Line 321... | Line 321... | ||
| 321 | 321 | ||
| Line 322... | Line 322... | ||
| 322 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: fragmented packet offset=%u id=%x\n", ax, [edx + IPv4_header.Identification]:4 |
322 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: fragmented packet offset=%u id=%x ptr=0x%x\n", ax, [edx + IPv4_header.Identification]:4, edx |
| 323 | 323 | ||
| Line 472... | Line 472... | ||
| 472 | je .first_fragment |
472 | je .first_fragment |
| 473 | sub cx, bx ; If not, dont copy the header |
473 | sub cx, bx ; If not, dont copy the header |
| 474 | add esi, ebx ; |
474 | add esi, ebx ; |
| 475 | .first_fragment: |
475 | .first_fragment: |
| Line -... | Line 476... | ||
| - | 476 | ||
| - | 477 | ||
| 476 | 478 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Copying %u bytes from 0x%x to 0x%x\n", ecx, esi, edi |
|
| 477 | push cx ; First copy dword-wise, then byte-wise |
479 | push cx ; First copy dword-wise, then byte-wise |
| 478 | shr cx, 2 ; |
480 | shr cx, 2 ; |
| 479 | rep movsd ; |
481 | rep movsd ; |
| 480 | pop cx ; |
482 | pop cx ; |
| 481 | and cx, 3 ; |
483 | and cx, 3 ; |
| Line 482... | Line 484... | ||
| 482 | rep movsb ; |
484 | rep movsb ; |
| - | 485 | ||
| - | 486 | push eax |
|
| 483 | 487 | push [edx + IPv4_FRAGMENT_entry.Owner] ; we need to remeber the owner, in case this is the last packet |
|
| 484 | push eax |
- | |
| 485 | push edx ; Push pointer to fragment onto stack |
488 | push [edx + IPv4_FRAGMENT_entry.NextPtr] ; Set edx to the next pointer |
| 486 | mov ebx, [edx + IPv4_FRAGMENT_entry.Owner] ; we need to remeber the owner, in case this is the last packet |
489 | push edx ; Push pointer to fragment onto stack |
| 487 | mov edx, [edx + IPv4_FRAGMENT_entry.NextPtr] ; Set edx to the next pointer |
490 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Next Fragment: 0x%x\n", edx |
| 488 | call NET_packet_free ; free the previous fragment buffer (this uses the value from stack) |
491 | call NET_packet_free ; free the previous fragment buffer (this uses the value from stack) |
| 489 | pop eax |
492 | pop edx ebx eax |
| Line 490... | Line 493... | ||
| 490 | cmp edx, -1 ; Check if it is last fragment in chain |
493 | cmp edx, -1 ; Check if it is last fragment in chain |
| 491 | jne .rebuild_packet_loop |
494 | jne .rebuild_packet_loop |
| Line 496... | Line 499... | ||
| 496 | mov [edx + IPv4_header.TotalLength], cx |
499 | mov [edx + IPv4_header.TotalLength], cx |
| 497 | add esp, 8 |
500 | add esp, 8 |
| 498 | xchg cl, ch |
501 | xchg cl, ch |
| 499 | push ecx |
502 | push ecx |
| Line -... | Line 503... | ||
| - | 503 | ||
| - | 504 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Packet is now de-fragmented\n" |
|
| 500 | 505 | ||
| 501 | push eax |
506 | push eax |
| Line 502... | Line 507... | ||
| 502 | jmp .handle_it ; edx = buf ptr, ecx = size, [esp] buf ptr, [esp+4], total size, ebx=device ptr |
507 | jmp .handle_it ; edx = buf ptr, ecx = size, [esp] buf ptr, [esp+4], total size, ebx=device ptr |
| 503 | 508 | ||