;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2008. 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: 983 $
MAX_ETH_DEVICES equ MAX_NET_DEVICES
ETH_QUEUE_SIZE equ 16
struct ETH_FRAME
.DstMAC dp ? ; destination MAC-address [6 bytes]
.SrcMAC dp ? ; source MAC-address [6 bytes]
.Type dw ? ; type of the upper-layer protocol [2 bytes]
.Data: ; data [46-1500 bytes]
ends
struct ETH_DEVICE
.unload dd ?
.reset dd ?
.transmit dd ?
.set_MAC dd ?
.get_MAC dd ?
.set_mode dd ?
.get_mode dd ?
.bytes_tx dq ?
.bytes_rx dq ?
.packets_tx dd ?
.packets_rx dd ?
.mode dd ? ; This dword contains cable status (10mbit/100mbit, full/half duplex, auto negotiation or not,..)
.name dd ?
.mac dp ?
ends ; the rest of the device struct depends on the type of device
align 4
uglobal
ETH_RUNNING dd ?
ETH_DRV_LIST rd MAX_ETH_DEVICES
ETH_IN_QUEUE rd 3*ETH_QUEUE_SIZE+3
ETH_OUT_QUEUE rd 3*ETH_QUEUE_SIZE+3
endg
;-----------------------------------------------
;
; ETH_init
;
; This function resets all ethernet variables
;
; IN: /
; OUT: /
;
;-----------------------------------------------
align 4
ETH_init:
xor eax, eax
mov edi, ETH_RUNNING
mov ecx, (1+MAX_ETH_DEVICES)
rep stosd
mov dword [ETH_IN_QUEUE], eax
mov dword [ETH_IN_QUEUE+4], ETH_IN_QUEUE + queue.data
mov dword [ETH_IN_QUEUE+8], ETH_IN_QUEUE + queue.data
mov dword [ETH_OUT_QUEUE], eax
mov dword [ETH_OUT_QUEUE+4], ETH_OUT_QUEUE + queue.data
mov dword [ETH_OUT_QUEUE+8], ETH_OUT_QUEUE + queue.data
ret
;---------------------------------------------------------
;
; ETH_Add_Device:
;
; This function is called by ethernet drivers,
; to register each running ethernet device to the kernel
;
; IN: Pointer to device structure in ebx
; OUT: Device num in eax, -1 on error
;
;---------------------------------------------------------
align 4
ETH_Add_Device:
DEBUGF 1,"ETH_Add_Device: %x\n", ebx
cmp [ETH_RUNNING], MAX_ETH_DEVICES
jge .error
mov eax, ebx
mov ecx, MAX_ETH_DEVICES ; We need to check whole list because a device may be removed without re-organizing list
mov edi, ETH_DRV_LIST
cld
repne scasd ; See if device is already in the list
jz .error
xor eax, eax
mov ecx, MAX_ETH_DEVICES
mov edi, ETH_DRV_LIST
repne scasd ; Find empty spot in the list
jnz .error
sub edi, 4
mov [edi], ebx ; add device to list
sub edi, ETH_DRV_LIST ; edi = 4*device num Calculate device number in eax
mov eax, edi ; edx = 4*device num
shr eax, 2
; shr eax, 1 ; edx = 2*device num
; add edi, eax ; edi = 6*device_num Meanwhile, calculate MAC offset in edi
; shr eax, 1 ; edx = device num
; add edi, MAC_LIST ; edi = MAC_LIST+6*device_num
; push eax
; push edi
; call [ebx+ETH_DEVICE.get_MAC] ; Get MAC address from driver
; pop edi
;
; stosd ; Write MAC address to the MAC list
; mov ax, bx ;
; stosw ;
inc [ETH_RUNNING] ; Indicate that one more ethernet device is up and running
; pop eax ; Output device num in eax
DEBUGF 1,"- succes: %u\n",eax
ret
.error:
or eax, -1
DEBUGF 1,"- fail\n"
ret
;--------------------------------
;
; ETH_Remove_Device:
;
; This function is called by ethernet drivers,
; to unregister ethernet devices from the kernel
;
; IN: Pointer to device structure in ebx
; OUT: eax: -1 on error
;
;--------------------------------
align 4
ETH_Remove_Device:
cmp [ETH_RUNNING], 0
je .error
mov eax, ebx
mov ecx, MAX_ETH_DEVICES
mov edi, ETH_DRV_LIST
repne scasd
jnz .error
xor eax, eax
mov dword [edi-4], eax
dec [ETH_RUNNING]
ret
.error:
or eax, -1
ret
;-------------------------------------------------------------
;
; ETH_Receiver:
;
; This function is called by ethernet drivers,
; It pushes the received ethernet packets onto the eth_in_queue
;
; IN: Pointer to buffer in [esp], size of buffer in [esp-4], pointer to eth_device in ebx
; OUT: /
;
;-------------------------------------------------------------
align 4
ETH_Receiver:
DEBUGF 1,"ETH_Receiver \n"
add_to_queue ETH_IN_QUEUE, ETH_QUEUE_SIZE, .gohome
.gohome:
ret
;-------------------------------------------------------------
;
; ETH_Handler:
;
; Handles all queued eth packets (called from kernel's main_loop)
;
; IN: /
; OUT: /
;
;-------------------------------------------------------------
align 4
ETH_Handler:
get_from_queue ETH_IN_QUEUE, ETH_QUEUE_SIZE, .gohome
DEBUGF 1,"ETH_Handler - size: %u\n", ecx
cmp ecx, 60 ; check packet length
jl .dump
sub ecx, ETH_FRAME.Data
lea edx, [eax + ETH_FRAME.Data]
mov ax , [eax + ETH_FRAME.Type]
cmp ax, ETHER_IPv4
je IPv4_Handler
cmp ax, ETHER_ARP
je ARP_Handler
DEBUGF 1,"Unknown ethernet packet type %x\n", ax
.dump:
DEBUGF 1,"Dumping packet\n"
call kernel_free
add esp, 4
.gohome:
ret ; return 1. to get more from queue / 2. to caller
;-----------------------------------------------------------------
;
; ETH_Sender:
;
; This function sends an ethernet packet to the correct driver.
;
; IN: Pointer to buffer in [esp]
; size of buffer in [esp+4]
; pointer to device struct in ebx
; OUT: /
;
;-----------------------------------------------------------------
align 4
ETH_Sender:
DEBUGF 1,"ETH_Sender \n"
add_to_queue ETH_OUT_QUEUE, ETH_QUEUE_SIZE, .gohome
.gohome:
ret
align 4
ETH_send_queued:
get_from_queue ETH_OUT_QUEUE, ETH_QUEUE_SIZE, .gohome
call ETH_struc2dev ; convert struct ptr to device num (this way we know if driver is still mounted)
cmp edi, -1
je .fail
DEBUGF 1,"ETH_Sender - device: %u\n", edi
jmp [ebx+ETH_DEVICE.transmit]
.fail:
call kernel_free
add esp, 4 ; pop (balance stack)
DEBUGF 1,"ETH_Sender - fail\n"
.gohome:
ret
;---------------------------------------------------------------------------
;
; ETH_struc2dev
;
; IN: pointer to device struct in ebx
;
; OUT: edi is -1 on error, device number otherwise
;
;---------------------------------------------------------------------------
align 4
ETH_struc2dev:
push eax ecx
mov eax, ebx
mov ecx, MAX_ETH_DEVICES
mov edi, ETH_DRV_LIST
repne scasd
jnz .error
sub edi, ETH_DRV_LIST+4
shr edi, 2
pop ecx eax
ret
.error:
or edi, -1
pop ecx eax
ret
;---------------------------------------------------------------------------
;
; ETH_create_Packet
;
; IN: pointer to source mac in eax
; pointer to destination mac in ebx
; packet size in ecx
; device number in edx
; protocol in di
;
; OUT: edi is -1 on error, pointer to buffer otherwise ;; TODO: XCHG EDX AND EBX output parameters
; eax points to buffer start
; ebx is size of complete buffer
; ecx is unchanged (packet size of embedded data)
; edx is pointer to device structure
; esi points to procedure wich needs to be called to send packet
;
;---------------------------------------------------------------------------
align 4
ETH_create_Packet:
DEBUGF 1,"Creating Ethernet Packet:\n"
cmp ecx, 60-ETH_FRAME.Data
jl .exit
cmp ecx, 1514-ETH_FRAME.Data
jg .exit
push ecx di eax ebx edx
add ecx, ETH_FRAME.Data
push ecx
push ecx
call kernel_alloc
test eax, eax
jz .pop_exit
pop ecx
pop edx
DEBUGF 1,"1"
mov edi, eax
pop esi
movsd
movsw
DEBUGF 1,"2"
pop esi
movsd
movsw
DEBUGF 1,"3"
pop ax
stosw
DEBUGF 1,"4"
lea eax, [edi - ETH_FRAME.Data] ; Set eax to buffer start
mov ebx, ecx ; Set ebx to complete buffer size
pop ecx
mov esi, ETH_Sender
xor edx, edx ;;;; TODO: Fixme
mov edx, [ETH_DRV_LIST + edx]
DEBUGF 1,"done: %x size:%u device:%x\n", eax, ebx, edx
ret
.pop_exit:
add esp, 18
.exit:
or edi, -1
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:
movzx eax, bh
shl eax, 2
test bl, bl
jz .packets_tx ; 0
dec bl
jz .packets_rx ; 1
dec bl
jz .bytes_tx ; 2
dec bl
jz .bytes_rx ; 3
dec bl
jz .read_mac ; 4
dec bl
jz .write_mac ; 5
dec bl
jz .in_queue ; 6
dec bl
jz .out_queue ; 7
.error:
mov eax, -1
ret
.packets_tx:
add eax, ETH_DRV_LIST
mov eax, dword [eax]
mov eax, dword [eax + ETH_DEVICE.packets_tx]
ret
.packets_rx:
add eax, ETH_DRV_LIST
mov eax, dword [eax]
mov eax, dword [eax + ETH_DEVICE.packets_rx]
ret
.bytes_tx:
add eax, ETH_DRV_LIST
mov eax, dword [eax]
mov eax, dword [eax + ETH_DEVICE.bytes_tx + 4]
ret
.bytes_rx:
add eax, ETH_DRV_LIST
mov eax, dword [eax]
mov eax, dword [eax + ETH_DEVICE.bytes_rx + 4]
ret
.read_mac:
add eax, ETH_DRV_LIST
mov eax, [eax]
; push eax
; call dword [eax + ETH_DEVICE.get_MAC]
; pop eax
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
add eax, ETH_DRV_LIST
mov eax, [eax]
mov eax, dword [eax + ETH_DEVICE.set_MAC]
call eax
ret
.in_queue:
add eax, ETH_IN_QUEUE
mov eax, [eax + queue.size]
ret
.out_queue:
add eax, ETH_OUT_QUEUE
mov eax, [eax + queue.size]
ret