| 363,6 → 363,7 |
|---|
| ; |
| ; IN: esi = ptr to entry (can easily be made on the stack) |
| ; OUT: eax = entry #, -1 on error |
| ; edi = ptr to newly created entry |
| ; |
| ;----------------------------------------------------------------- ; TODO: use a mutex |
| align 4 |
| 398,6 → 399,7 |
|---|
| mov ecx, sizeof.ARP_entry/2 |
| rep movsw |
| inc [NumARP] |
| sub edi, sizeof.ARP_entry |
| DEBUGF 1,"entry=%u\n", eax |
| |
| ret |
| 498,36 → 500,42 |
|---|
| pushd eax ; ip |
| mov esi, esp |
| call ARP_add_entry |
| add esp, sizeof.ARP_entry |
| add esp, sizeof.ARP_entry ; clear the entry from stack |
| |
| cmp eax, -1 |
| cmp eax, -1 ; did ARP_add_entry fail? |
| je .full |
| |
| ; And send a request |
| pop edi eax |
| call ARP_output_request ; IP in eax |
| ;; TODO: check if driver could transmit packet |
| mov esi, edi |
| pop edi eax ; IP in eax, device number in edi, for ARP_output_request |
| |
| mov eax, -2 ; request send |
| ret |
| push esi edi |
| call ARP_output_request ; And send a request |
| pop edi esi |
| |
| ;----------------------------------------------- |
| ; At this point, we got an ARP entry in the list |
| .found_it: |
| DEBUGF 1,"ARP_IP_to_MAC: found IP\n" |
| cmp [esi + ARP_entry.Status], ARP_VALID_MAPPING |
| jne .invalid |
| cmp [esi + ARP_entry.Status], ARP_VALID_MAPPING ; Does it have a MAC assigned? |
| je .valid |
| cmp [esi + ARP_entry.Status], ARP_AWAITING_RESPONSE ; Are we waiting for reply from remote end? |
| jne .give_up |
| push esi |
| mov esi, 10 ; wait 10 ms |
| call delay_ms |
| pop esi |
| jmp .found_it ; now check again |
| |
| .valid: |
| DEBUGF 1,"ARP_IP_to_MAC: found MAC\n" |
| movzx eax, word [esi + ARP_entry.MAC] |
| mov ebx, dword[esi + ARP_entry.MAC + 2] |
| ret |
| |
| .invalid: |
| DEBUGF 1,"ARP_IP_to_MAC: entry has no valid mapping!\n" |
| mov eax, -1 |
| ret |
| |
| .full: |
| DEBUGF 1,"ARP_IP_to_MAC: table is full!\n" |
| add esp, 8 |
| .give_up: |
| DEBUGF 1,"ARP_IP_to_MAC: entry has no valid mapping!\n" |
| mov eax, -1 |
| ret |
| |