Subversion Repositories Kolibri OS

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;;                                                                 ;;

;; Copyright (C) KolibriOS team 2004-2009. All rights reserved.    ;;

;; Distributed under terms of the GNU General Public License       ;;

;;                                                                 ;;

;;  STACK.INC                                                      ;;

;;                                                                 ;;

;;  BASIC TCP/IP stack for KolibriOS                               ;;

;;                                                                 ;;

;;    Written by hidnplayr@kolibrios.org                           ;;

;;                                                                 ;;

;;     based on the work of Mike Hibbett, mikeh@oceanfree.net      ;;

;;     but also Paolo Franchetti                                   ;;

;;                                                                 ;;

;;          GNU GENERAL PUBLIC LICENSE                             ;;

;;             Version 2, June 1991                                ;;

;;                                                                 ;;

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$Revision: 983 $

uglobal

	last_1sTick	db ?

	last_1hsTick	dd ?

endg

MAX_NET_DEVICES equ 16

MIN_EPHEMERAL_PORT equ 49152

MAX_EPHEMERAL_PORT equ 61000

ETHER		equ 1337

ETHER_ARP	equ 0x0608

;AF_UNSPEC       equ 0

;AF_UNIX         equ 1

AF_INET4	equ 2

;AF_AX25         equ 3

;AF_IPX          equ 4

;AF_APPLETALK    equ 5

;AF_NETROM       equ 6

;AF_BRIDGE       equ 7

;AF_AAL5         equ 8

;AF_X25          equ 9

;AF_INET6        equ 10

;AF_MAX          equ 12

IP_PROTO_IP	equ 0

IP_PROTO_ICMP	equ 1

IP_PROTO_TCP	equ 6

IP_PROTO_UDP	equ 17

; TCP opening modes

SOCKET_PASSIVE	equ 0

SOCKET_ACTIVE	equ 1

include "queue.inc"

include "ARP.inc"

include "IPv4.inc"

include "ethernet.inc"

include "socket.inc"

;include "tcp.inc"

include "udp.inc"

include "icmp.inc"

;-----------------------------------------------

;

; stack_init

;

;  This function calls all network init procedures

;

;  IN:  /

;  OUT: /

;

;-----------------------------------------------

align 4

stack_init:

	call	ETH_init

	call	IPv4_init

	call	ARP_init

	call	UDP_init

	call	ICMP_init

	call	socket_init

	mov	al, 0x0 		; set up 1s timer

	out	0x70, al

	in	al, 0x71

	mov	[last_1sTick], al

	ret

;-----------------------------------------------

;

; stack_handler

;

;  This function calls all network init procedures

;

;  IN:  /

;  OUT: /

;

;-----------------------------------------------

align 4

stack_handler:

    cmp     [ETH_RUNNING], 0

    je	    .exit

    call    ETH_Handler 		; handle all queued ethernet packets

    call    ETH_send_queued

    ; Test for 10ms tick, call tcp timer

    mov     eax, [timer_ticks]

    cmp     eax, [last_1hsTick]

    je	    .exit

    mov     [last_1hsTick], eax

    call    tcp_tx_handler

  .sec_tick:

    ; Test for 1 second event, call 1s timer functions

    mov     al, 0x0   ;second

    out     0x70, al

    in	    al, 0x71

    cmp     al, [last_1sTick]

    je	    .exit

    mov     [last_1sTick], al

    call    ARP_decrease_entry_ttls

    call    IPv4_decrease_fragment_ttls

    call    tcp_tcb_handler

  .exit:

    ret

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;; Checksum [by Johnny_B]

;;  IN:

;;    buf_ptr=POINTER to buffer

;;    buf_size=SIZE of buffer

;;  OUT:

;;    AX=16-bit checksum

;;              Saves all used registers

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

proc checksum_jb stdcall uses ebx esi ecx,\

     buf_ptr:DWORD, buf_size:DWORD

    xor     eax, eax

    xor     ebx, ebx  ;accumulator

    mov     esi, dword[buf_ptr]

    mov     ecx, dword[buf_size]

    shr     ecx, 1  ; ecx=ecx/2

    jnc     @f	    ; if CF==0 then size is even number

    mov     bh, byte[esi + ecx*2]

  @@:

    cld

  .loop:

    lodsw		;eax=word[esi],esi=esi+2

    xchg    ah,al	;cause must be a net byte-order

    add     ebx, eax

    loop    .loop

    mov     eax, ebx

    shr     eax, 16

    add     ax, bx

    not     ax

    ret

endp

;----------------------------------------------------------------

;

;  System function to work with network devices (73)

;

;----------------------------------------------------------------

align 4

sys_network:

	cmp	bh, MAX_NET_DEVICES		 ; Check if device number exists

	jge	.doesnt_exist

	mov	esi, ebx

	and	esi, 0x0000ff00

	shr	esi, 6

	cmp	dword [esi + ETH_DRV_LIST], 0 ; check if driver is running

	je	.doesnt_exist

	test	bl, bl			; 0 = Get device type (ethernet/token ring/...)

	jnz	@f

	xor	eax, eax

	jmp	.return

  @@:

	dec	bl			; 1 = Get device name

	jnz	@f

	mov	esi, [esi + ETH_DRV_LIST]

	mov	esi, [esi + ETH_DEVICE.name]

	mov	edi, ecx

	mov	ecx, 64 ; max length

	repnz	movsb

	xor	eax, eax

	jmp	.return

  @@:

	dec	bl			; 2 = Reset the device

	jnz	@f

	mov	esi, [esi + ETH_DRV_LIST]

	call	[esi + ETH_DEVICE.reset]

	jmp	.return

  @@:

	dec	bl			; 3 = Stop driver for this device

	jnz	@f

	mov	esi, [esi + ETH_DRV_LIST]

	call	[esi + ETH_DEVICE.unload]

	jmp	.return

  @@:

  .doesnt_exist:

	DEBUGF	1,"sys_network: invalid device/function specified!\n"

	mov	eax, -1

  .return:

	mov	[esp+28+4], eax

	ret

;----------------------------------------------------------------

;

;  System Function To work with Protocols  (75)

;

;----------------------------------------------------------------

align 4

sys_protocols:

	cmp	bh, MAX_NET_DEVICES		; Check if device number exists

	jge	.doesnt_exist

	mov	esi, ebx

	and	esi, 0x0000ff00

	shr	esi, 6

	cmp	dword [esi + ETH_DRV_LIST], 0	; check if driver is running TODO: check other lists too

	je	.doesnt_exist

	push	.return 			; return address (we will be using jumps instead of calls)

	mov	eax, ebx			; set ax to protocol number

	shr	eax, 16 			;

	cmp	ax , IP_PROTO_IP

	je	IPv4_API

	cmp	ax , IP_PROTO_ICMP

	je	ICMP_API

	cmp	ax , IP_PROTO_UDP

	je	UDP_API

	cmp	ax , IP_PROTO_TCP

;        je      TCP_API

	cmp	ax , ETHER_ARP

	je	ARP_API

	cmp	ax , ETHER

	je	ETH_API

	add	esp, 4				 ; if we reached here, no function was called, so we need to balance stack

  .doesnt_exist:

	DEBUGF	1,"sys_protocols: protocol %u doesnt exist on device %u!\n",ax, bh

	mov	eax, -1

  .return:

	mov	[esp+28+4], eax

	ret