Rev 2614 | Go to most recent revision | Show entire file | Regard whitespace | Details | Blame | Last modification | View Log | RSS feed
| Rev 2614 | Rev 2621 | ||
|---|---|---|---|
| Line 14... | Line 14... | ||
| 14 | ;; GNU GENERAL PUBLIC LICENSE ;; |
14 | ;; GNU GENERAL PUBLIC LICENSE ;; |
| 15 | ;; Version 2, June 1991 ;; |
15 | ;; Version 2, June 1991 ;; |
| 16 | ;; ;; |
16 | ;; ;; |
| 17 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
17 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| Line 18... | Line 18... | ||
| 18 | 18 | ||
| Line 19... | Line 19... | ||
| 19 | $Revision: 2614 $ |
19 | $Revision: 2621 $ |
| 20 | 20 | ||
| 21 | MAX_FRAGMENTS = 64 |
21 | MAX_FRAGMENTS = 64 |
| Line 198... | Line 198... | ||
| 198 | ; size of IP packet in ecx |
198 | ; size of IP packet in ecx |
| 199 | ; OUT: / |
199 | ; OUT: / |
| 200 | ; |
200 | ; |
| 201 | ;----------------------------------------------------------------- |
201 | ;----------------------------------------------------------------- |
| 202 | align 4 |
202 | align 4 |
| 203 | IPv4_input: ; TODO: implement handler for IP options |
- | |
| 204 | ; TODO2: add code for raw sockets |
203 | IPv4_input: ; TODO: add code for raw sockets |
| Line 205... | Line 204... | ||
| 205 | 204 | ||
| 206 | DEBUGF 1,"IPv4_input, packet from: %u.%u.%u.%u ",\ |
205 | DEBUGF 1,"IPv4_input, packet from: %u.%u.%u.%u ",\ |
| 207 | [edx + IPv4_header.SourceAddress]:1,[edx + IPv4_header.SourceAddress + 1]:1,[edx + IPv4_header.SourceAddress + 2]:1,[edx + IPv4_header.SourceAddress + 3]:1 |
206 | [edx + IPv4_header.SourceAddress]:1,[edx + IPv4_header.SourceAddress + 1]:1,[edx + IPv4_header.SourceAddress + 2]:1,[edx + IPv4_header.SourceAddress + 3]:1 |
| 208 | DEBUGF 1,"to: %u.%u.%u.%u\n",\ |
207 | DEBUGF 1,"to: %u.%u.%u.%u\n",\ |
| Line 212... | Line 211... | ||
| 212 | ; Check if the packet still has time to live |
211 | ; Check if the packet still has time to live |
| Line 213... | Line 212... | ||
| 213 | 212 | ||
| 214 | cmp byte [edx + IPv4_header.TimeToLive], 0 |
213 | cmp byte [edx + IPv4_header.TimeToLive], 0 |
| Line 215... | Line -... | ||
| 215 | je .dump |
- | |
| 216 | - | ||
| 217 | ;-------------------------------------- |
- | |
| 218 | ; First, check if IP packet has options |
- | |
| 219 | - | ||
| 220 | movzx eax, [edx + IPv4_header.VersionAndIHL] |
- | |
| 221 | and al , 0x0f ; get IHL(header length) |
- | |
| 222 | cmp al , 0x05 ; IHL!= 5*4(20 bytes) |
- | |
| 223 | jnz .has_options |
214 | je .dump |
| 224 | 215 | ||
| Line 225... | Line 216... | ||
| 225 | ;------------------------------- |
216 | ;------------------------------- |
| 226 | ; Now, re-calculate the checksum |
217 | ; Now, re-calculate the checksum |
| Line 528... | Line 519... | ||
| 528 | jmp .dump |
519 | jmp .dump |
| Line 529... | Line -... | ||
| 529 | - | ||
| 530 | - | ||
| 531 | - | ||
| 532 | - | ||
| 533 | ;----------------------------------- |
- | |
| 534 | ; The IP packet has some options |
- | |
| 535 | - | ||
| Line 536... | Line 520... | ||
| 536 | .has_options: |
520 | |
| 537 | jmp .dump |
521 | |
| 538 | 522 | ||
| 539 | 523 | ||
| Line 947... | Line 931... | ||
| 947 | IPv4_api: |
931 | IPv4_api: |
| Line 948... | Line 932... | ||
| 948 | 932 | ||
| 949 | movzx eax, bh |
933 | movzx eax, bh |
| Line 950... | Line 934... | ||
| 950 | shl eax, 2 |
934 | shl eax, 2 |
| 951 | 935 | ||
| 952 | and ebx, 0xff |
936 | and ebx, 0x000000ff |
| 953 | cmp ebx, .number |
937 | cmp ebx, .number |
| Line 954... | Line 938... | ||
| 954 | ja .error |
938 | ja .error |
| 955 | jmp dword [.table + 4*ebx] |
939 | jmp dword [.table + 4*ebx] |
| 956 | 940 | ||
| - | 941 | .table: |
|
| 957 | .table: |
942 | dd .packets_tx ; 0 |
| 958 | dd .packets_tx ; 0 |
943 | dd .packets_rx ; 1 |
| 959 | dd .packets_rx ; 1 |
944 | dd .read_ip ; 2 |
| 960 | dd .write_ip ; 3 |
945 | dd .write_ip ; 3 |
| 961 | dd .read_dns ; 4 |
946 | dd .read_dns ; 4 |