| 200,8 → 200,7 |
|---|
| ; |
| ;----------------------------------------------------------------- |
| align 4 |
| IPv4_input: ; TODO: implement handler for IP options |
| ; TODO2: add code for raw sockets |
| IPv4_input: ; TODO: add code for raw sockets |
| |
| DEBUGF 1,"IPv4_input, packet from: %u.%u.%u.%u ",\ |
| [edx + IPv4_header.SourceAddress]:1,[edx + IPv4_header.SourceAddress + 1]:1,[edx + IPv4_header.SourceAddress + 2]:1,[edx + IPv4_header.SourceAddress + 3]:1 |
| 214,14 → 213,6 |
|---|
| cmp byte [edx + IPv4_header.TimeToLive], 0 |
| je .dump |
| |
| ;-------------------------------------- |
| ; First, check if IP packet has options |
| |
| movzx eax, [edx + IPv4_header.VersionAndIHL] |
| and al , 0x0f ; get IHL(header length) |
| cmp al , 0x05 ; IHL!= 5*4(20 bytes) |
| jnz .has_options |
| |
| ;------------------------------- |
| ; Now, re-calculate the checksum |
| |
| 530,14 → 521,7 |
|---|
| |
| |
| |
| ;----------------------------------- |
| ; The IP packet has some options |
| |
| .has_options: |
| jmp .dump |
| |
| |
| |
| ;----------------------------------------------------------------- |
| ; |
| ; find fragment slot |
| 949,7 → 933,7 |
|---|
| movzx eax, bh |
| shl eax, 2 |
| |
| and ebx, 0xff |
| and ebx, 0x000000ff |
| cmp ebx, .number |
| ja .error |
| jmp dword [.table + 4*ebx] |
| 957,6 → 941,7 |
|---|
| .table: |
| dd .packets_tx ; 0 |
| dd .packets_rx ; 1 |
| dd .read_ip ; 2 |
| dd .write_ip ; 3 |
| dd .read_dns ; 4 |
| dd .write_dns ; 5 |