;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2010. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; ETHERNET.INC ;;
;; ;;
;; Ethernet network layer for KolibriOS ;;
;; ;;
;; Written by hidnplayr@kolibrios.org ;;
;; ;;
;; GNU GENERAL PUBLIC LICENSE ;;
;; Version 2, June 1991 ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision: 2614 $
struct ETH_header
DstMAC dp ? ; destination MAC-address
SrcMAC dp ? ; source MAC-address
Type dw ? ; type of the upper-layer protocol
ends
ETH_FRAME_MINIMUM = 60
struct ETH_DEVICE NET_DEVICE
set_mode dd ?
get_mode dd ?
set_MAC dd ?
get_MAC dd ?
mode dd ?
mac dp ?
ends
align 4
iglobal
ETH_BROADCAST dp 0xffffffffffff
endg
;-----------------------------------------------------------------
;
; ETH_input
;
; This function is called by ethernet drivers,
; It pushes the received ethernet packets onto the eth_in_queue
;
; IN: [esp] = Pointer to buffer
; [esp+4] = size of buffer
; ebx = pointer to eth_device
; OUT: /
;
;-----------------------------------------------------------------
align 4
ETH_input:
mov eax, [esp]
mov ecx, [esp+4]
DEBUGF 1,"ETH_input - size: %u\n", ecx
cmp ecx, ETH_FRAME_MINIMUM
jb .dump
sub ecx, sizeof.ETH_header
lea edx, [eax + sizeof.ETH_header]
mov ax , [eax + ETH_header.Type]
cmp ax, ETHER_IPv4
je IPv4_input
cmp ax, ETHER_ARP
je ARP_input
; cmp ax, ETHER_PPP_DISCOVERY
; je PPPoE_discovery_input
DEBUGF 2,"Unknown ethernet packet type %x\n", ax
.dump:
DEBUGF 2,"ETH_input - dumping\n"
call kernel_free
add esp, 4
ret
;-----------------------------------------------------------------
;
; ETH_output
;
; IN: eax = pointer to source mac
; ebx = device ptr
; ecx = packet size
; edx = pointer to destination mac
; di = protocol
;
; OUT: edi = 0 on error, pointer to buffer otherwise
; eax = buffer start
; ebx = to device structure
; ecx = unchanged (packet size of embedded data)
; edx = size of complete buffer
;
;-----------------------------------------------------------------
align 4
ETH_output:
DEBUGF 1,"ETH_output: size=%u device:%x\n", ecx, ebx
cmp ecx, [ebx + NET_DEVICE.mtu]
ja .exit
push ecx
push di eax edx
add ecx, sizeof.ETH_header
stdcall kernel_alloc, ecx
test eax, eax
jz .out_of_ram
mov edi, eax
pop esi
movsd
movsw
pop esi
movsd
movsw
pop ax
stosw
lea eax, [edi - sizeof.ETH_header] ; Set eax to buffer start
pop ecx
lea edx, [ecx + sizeof.ETH_header] ; Set edx to complete buffer size
cmp edx, ETH_FRAME_MINIMUM
jbe .adjust_size
.done:
DEBUGF 1,"ETH_output: done: %x total size: %u\n", eax, edx
ret
.adjust_size:
mov edx, ETH_FRAME_MINIMUM
test edx, edx ; clear zero flag
jmp .done
.out_of_ram:
DEBUGF 2,"ETH_output: Out of ram space!!\n"
add esp, 4+4+2+4
sub edi, edi
ret
.exit:
DEBUGF 2,"ETH_output: Packet too large!\n"
sub edi, edi
ret
;-----------------------------------------------------------------
;
; ETH_API
;
; This function is called by system function 75
;
; IN: subfunction number in bl
; device number in bh
; ecx, edx, .. depends on subfunction
;
; OUT:
;
;-----------------------------------------------------------------
align 4
ETH_api:
cmp bh, MAX_NET_DEVICES
ja .error
movzx eax, bh
mov eax, dword [NET_DRV_LIST + 4*eax]
cmp [eax + NET_DEVICE.type], NET_TYPE_ETH
jne .error
and ebx, 0xff
cmp ebx, .number
ja .error
jmp dword [.table + 4*ebx]
.table:
dd .packets_tx ; 0
dd .packets_rx ; 1
dd .bytes_tx ; 2
dd .bytes_rx ; 3
dd .read_mac ; 4
dd .write_mac ; 5
.number = ($ - .table) / 4 - 1
.error:
DEBUGF 2,"Device is not ethernet type\n"
or eax, -1
ret
.packets_tx:
mov eax, [eax + NET_DEVICE.packets_tx]
ret
.packets_rx:
mov eax, [eax + NET_DEVICE.packets_rx]
ret
.bytes_tx:
mov ebx, dword [eax + NET_DEVICE.bytes_tx + 4]
mov eax, dword [eax + NET_DEVICE.bytes_tx]
mov [esp+20+4], ebx ; TODO: fix this ugly code
ret
.bytes_rx:
mov ebx, dword [eax + NET_DEVICE.bytes_rx + 4]
mov eax, dword [eax + NET_DEVICE.bytes_rx]
mov [esp+20+4], ebx ; TODO: fix this ugly code
ret
.read_mac:
movzx ebx, word [eax + ETH_DEVICE.mac]
mov eax, dword [eax + ETH_DEVICE.mac + 2]
mov [esp+20+4], ebx ; TODO: fix this ugly code
ret
.write_mac:
push ecx
push dx
call [eax + ETH_DEVICE.set_MAC]
ret