Subversion Repositories Kolibri OS

; Automated dhcp client

; v 1.3

;

; with thanks to authors of DHCP client for menuetos: Mike Hibbet

;

; by HidnPlayr & Derpenguin

TIMEOUT equ 60 ; in seconds

BUFFER	equ 1024

__DEBUG__ equ 1

__DEBUG_LEVEL__ equ 1; 1 = all, 2 = errors

use32

	       org    0x0

	       db     'MENUET01'	      ; 8 byte id

	       dd     0x01		      ; header version

	       dd     START		      ; start of code

	       dd     IM_END		      ; size of image

	       dd     I_END		      ; memory for app

	       dd     I_END		      ; esp

	       dd     0x0 , 0x0 	      ; I_Param , I_Icon

;include 'macros.inc'

include 'eth.inc'

include 'debug-fdo.inc'

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

; CONFIGURATION FOR LINK-LOCAL                                                         ;

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

				       ;                                               ;

PROBE_WAIT	    equ 1	       ; second  (initial random delay)                ;

PROBE_MIN	    equ 1	       ; second  (minimum delay till repeated probe)   ;

PROBE_MAX	    equ 2	       ; seconds (maximum delay till repeated probe)   ;

PROBE_NUM	    equ 3	       ;         (number of probe packets)             ;

				       ;                                               ;

ANNOUNCE_NUM	    equ 2	       ;         (number of announcement packets)      ;

ANNOUNCE_INTERVAL   equ 2	       ; seconds (time between announcement packets)   ;

ANNOUNCE_WAIT	    equ 2	       ; seconds (delay before announcing)             ;

				       ;                                               ;

MAX_CONFLICTS	    equ 10	       ;         (max conflicts before rate limiting)  ;

				       ;                                               ;

RATE_LIMIT_INTERVAL equ 60	       ; seconds (delay between successive attempts)   ;

				       ;                                               ;

DEFEND_INTERVAL     equ 10	       ; seconds (min. wait between defensive ARPs)    ;

				       ;                                               ;

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

START:				       ; start of execution

    mov     eax,40		       ; Report events

    mov     ebx,10000000b	       ; Only Stack

    int     0x40

    mov     eax,52		       ; first, enable the stack (packet driver)

    mov     ebx,2

    mov     ecx,0x00000383

    int     0x40

    DEBUGF  1,"DHCP: Stack Initialized.\n"

    eth.status eax		       ; Read the Stack status

    test    eax,eax		       ; if eax is zero, no driver was found

    jnz     @f

    DEBUGF  1,"DHCP: No Card detected\n"

    jmp     close

   @@:

    DEBUGF  1,"DHCP: Detected card: %x\n",eax

   @@:

    eth.check_cable eax

    test    al,al

    jnz     @f

    DEBUGF  1,"DHCP: Ethernet Cable not connected\n"

    mov     eax,5

    mov     ebx,500		       ; loop until cable is connected (check every 5 sec)

    int     0x40

    jmp     @r

   @@:

    DEBUGF  1,"DHCP: Ethernet Cable status: %d\n",al

    eth.read_mac MAC

    DEBUGF  1,"DHCP: MAC address: %x-%x-%x-%x-%x-%x\n",[MAC]:2,[MAC+1]:2,[MAC+2]:2,[MAC+3]:2,[MAC+4]:2,[MAC+5]:2

;    jmp     apipa   ; comment this out if you want to skip DHCP and continue with link-local

;***************************************************************************

;

;  DHCP rubish starts here

;

;***************************************************************************

    eth.check_port 68,eax	       ; Check if port 68 is available

    cmp     eax,1

    je	    @f

    DEBUGF  1,"DHCP: Port 68 is already in use.\n"

    jmp     close

   @@:

    eth.open_udp 68,67,-1,[socketNum]  ; open socket (local,remote,ip,socket)

    DEBUGF  1,"DHCP: Socket opened: %d\n",eax

				       ; Setup the first msg we will send

    mov     byte [dhcpMsgType], 0x01   ; DHCP discover

    mov     dword [dhcpLease], esi     ; esi is still -1 (-1 = forever)

    mov     eax,26

    mov     ebx,9

    int     0x40

    imul    eax,100

    mov     [currTime],eax

;***************************************************************************

;   Function

;      buildRequest

;

;   Description

;      Creates a DHCP request packet.

;

;***************************************************************************

buildRequest:

    xor     eax,eax			    ; Clear dhcpMsg to all zeros

    mov     edi,dhcpMsg

    mov     ecx,BUFFER

    cld

    rep     stosb

    mov     edx, dhcpMsg

    mov     [edx], byte 0x01		    ; Boot request

    mov     [edx+1], byte 0x01		    ; Ethernet

    mov     [edx+2], byte 0x06		    ; Ethernet h/w len

    mov     [edx+4], dword 0x11223344	    ; xid

    mov     eax,[currTime]

    mov     [edx+8], eax		    ; secs, our uptime

    mov     [edx+10], byte 0x80 	    ; broadcast flag set

    mov     eax, dword [MAC]		    ; first 4 bytes of MAC

    mov     [edx+28],dword eax

    mov     ax, word [MAC+4]		    ; last 2 bytes of MAC

    mov     [edx+32],word ax

    mov     [edx+236], dword 0x63538263     ; magic number

    mov     [edx+240], word 0x0135	    ; option DHCP msg type

    mov     al, [dhcpMsgType]

    mov     [edx+240+2], al

    mov     [edx+240+3], word 0x0433	    ; option Lease time = infinity

    mov     eax, [dhcpLease]

    mov     [edx+240+5], eax

    mov     [edx+240+9], word 0x0432	    ; option requested IP address

    mov     eax, [dhcpClientIP]

    mov     [edx+240+11], eax

    mov     [edx+240+15], word 0x0437	    ; option request list

    mov     [edx+240+17], dword 0x0f060301

    cmp     [dhcpMsgType], byte 0x01	    ; Check which msg we are sending

    jne     br001

    mov     [edx+240+21], byte 0xff	    ; "Discover" options

    mov     [dhcpMsgLen], dword 262	    ; end of options marker

    jmp     ctr000

br001:					    ; "Request" options

    mov     [edx+240+21], word 0x0436	    ; server IP

    mov     eax, [dhcpServerIP]

    mov     [edx+240+23], eax

    mov     [edx+240+27], byte 0xff	    ; end of options marker

    mov     [dhcpMsgLen], dword 268

ctr000:

    eth.write_udp [socketNum],[dhcpMsgLen],dhcpMsg    ; write to socket ( send broadcast request )

    mov     eax, dhcpMsg		    ; Setup the DHCP buffer to receive response

    mov     [dhcpMsgLen], eax		    ; Used as a pointer to the data

    mov     eax,23			    ; wait here for event (data from remote)

    mov     ebx,TIMEOUT*10

    int     0x40

    eth.poll [socketNum]