;
; TFTP Client
use32
org 0x0
db 'MENUET01' ; header
dd 0x01 ; header version
dd START ; entry point
dd I_END ; image size
dd I_END+0x10000 ; required memory
dd I_END+0x10000 ; esp
dd 0x0 , 0x0 ; I_Param , I_Path
include 'lang.inc'
include 'macros.inc'
START: ; start of execution
mov eax,40 ; Report events
mov ebx,10000111b ; Stack 8 + defaults
int 0x40
mov dword [prompt], p1
mov dword [promptlen], p1len - p1
call draw_window ; at first, draw the window
still:
mov eax,10 ; wait here for event
int 0x40
cmp eax,1 ; redraw request ?
jz red
cmp eax,2 ; key in buffer ?
jz key
cmp eax,3 ; button in buffer ?
jz button
jmp still
red: ; redraw
call draw_window
jmp still
key: ; Keys are not valid at this part of the
mov eax,2 ; loop. Just read it and ignore
int 0x40
jmp still
button: ; button
mov eax,17 ; get id
int 0x40
cmp ah,1 ; button id=1 ?
jnz noclose
; close socket before exiting
mov eax, 53
mov ebx, 1
mov ecx, [socketNum]
int 0x40
mov [socketNum], dword 0
mov eax,0xffffffff ; close this program
int 0x40
noclose:
cmp ah,2 ; copy file to local machine?
jnz nocopyl
mov dword [prompt], p5
mov dword [promptlen], p5len - p5
call draw_window ;
; Copy File from Remote Host to this machine
call translateData ; Convert Filename & IP address
mov edi, tftp_filename + 1
mov [edi], byte 0x01 ; setup tftp msg
call copyFromRemote
jmp still
nocopyl:
cmp ah,3 ; Copy file to host?
jnz nocopyh
mov dword [prompt], p5
mov dword [promptlen], p5len - p5
call draw_window ;
; Copy File from this machine to Remote Host
call translateData ; Convert Filename & IP address
mov edi, tftp_filename + 1
mov [edi], byte 0x02 ; setup tftp msg
call copyToRemote
jmp still
nocopyh:
cmp ah,4
jz f1
cmp ah,5
jz f2
jmp nof12
f1:
mov [addr],dword source
mov [ya],dword 35
jmp rk
f2:
mov [addr],dword destination
mov [ya],dword 35+16
rk:
mov ecx,15
mov edi,[addr]
mov al,' '
rep stosb
call print_text
mov edi,[addr]
f11:
mov eax,10
int 0x40
cmp eax,2
jz fbu
jmp still
fbu:
mov eax,2
int 0x40 ; get key
shr eax,8
cmp eax,8
jnz nobs
cmp edi,[addr]
jz f11
sub edi,1
mov [edi],byte ' '
call print_text
jmp f11
nobs:
cmp eax,dword 31
jbe f11
cmp eax,dword 95
jb keyok
sub eax,32
keyok:
mov [edi],al
call print_text
add edi,1
mov esi,[addr]
add esi,15
cmp esi,edi
jnz f11
jmp still
print_text:
mov eax,13
mov ebx,103*65536+15*6
mov ecx,[ya]
shl ecx,16
mov cx,8
mov edx,0x224466
int 0x40
mov eax,4
mov ebx,103*65536
add ebx,[ya]
mov ecx,0xffffff
mov edx,[addr]
mov esi,15
int 0x40
ret
nof12:
jmp still
;***************************************************************************
; Function
; translateData
;
; Description
; Coverts the filename and IP address typed in by the user into
; a format suitable for the IP layer.
;
; The filename, in source, is converted and stored in tftp_filename
; The host ip, in destination, is converted and stored in tftp_IP
;
;***************************************************************************
translateData:
; first, build up the tftp command string. This includes the filename
; and the transfer protocol
; First, write 0,0
mov al, 0
mov edi, tftp_filename
mov [edi], al
inc edi
mov [edi], al
inc edi
; Now, write the file name itself, and null terminate it
mov ecx, 15
mov ah, ' '
mov esi, source
td001:
lodsb
stosb
cmp al, ah
loopnz td001
cmp al,ah ; Was the entire buffer full of characters?
jne td002
dec edi ; No - so remove ' ' character
td002:
mov [edi], byte 0
inc edi
mov [edi], byte 'O'
inc edi
mov [edi], byte 'C'
inc edi
mov [edi], byte 'T'
inc edi
mov [edi], byte 'E'
inc edi
mov [edi], byte 'T'
inc edi
mov [edi], byte 0
mov esi, tftp_filename
sub edi, esi
mov [tftp_len], edi
; Now, convert the typed IP address into a real address
; No validation is done on the number entered
; ip addresses must be typed in normally, eg
; 192.1.45.24
xor eax, eax
mov dh, 10
mov dl, al
mov [tftp_IP], eax
; 192.168.24.1 1.1.1.1 1. 9.2.3.
mov esi, destination
mov edi, tftp_IP
mov ecx, 4
td003:
lodsb
sub al, '0'
add dl, al
lodsb
cmp al, '.'
je ipNext
cmp al, ' '
je ipNext
mov dh, al
sub dh, '0'
mov al, 10
mul dl
add al, dh
mov dl, al
lodsb
cmp al, '.'
je ipNext
cmp al, ' '
je ipNext
mov dh, al
sub dh, '0'
mov al, 10
mul dl
add al, dh
mov dl, al
lodsb
ipNext:
mov [edi], dl
inc edi
mov dl, 0
loop td003
ret
;***************************************************************************
; Function
; copyFromRemote
;
; Description
;
;***************************************************************************
copyFromRemote:
xor eax, eax
mov [filesize], eax
mov eax, I_END + 512 ; This is the point where the file buffer is
mov [fileposition], eax
; Get a random # for the local socket port #
mov eax, 3
int 0x40
mov ecx, eax
shr ecx, 8 ; Set up the local port # with a random #
; open socket
mov eax, 53
mov ebx, 0
mov edx, 69 ; remote port
mov esi, [tftp_IP] ; remote IP ( in intenet format )
int 0x40
mov [socketNum], eax
; make sure there is no data in the socket - there shouldn't be..
cfr001:
mov eax, 53
mov ebx, 3
mov ecx, [socketNum]
int 0x40 ; read byte
mov eax, 53
mov ebx, 2
mov ecx, [socketNum]
int 0x40 ; any more data?
cmp eax, 0
jne cfr001 ; yes, so get it
; Now, request the file
mov eax, 53
mov ebx, 4
mov ecx, [socketNum]
mov edx, [tftp_len]
mov esi, tftp_filename
int 0x40
cfr002:
mov eax,10 ; wait here for event
int 0x40
cmp eax,1 ; redraw request ?
je cfr003
cmp eax,2 ; key in buffer ?
je cfr004
cmp eax,3 ; button in buffer ?
je cfr005
; Any data to fetch?
mov eax, 53
mov ebx, 2
mov ecx, [socketNum]
int 0x40
cmp eax, 0
je cfr002
push eax ; eax holds # chars
; Update the text on the display - once
mov eax, [prompt]
cmp eax, p3
je cfr008
mov dword [prompt], p3
mov dword [promptlen], p3len - p3
call draw_window ;
cfr008:
; we have data - this will be a tftp frame
; read first two bytes - opcode
mov eax, 53
mov ebx, 3
mov ecx, [socketNum]
int 0x40 ; read byte
mov eax, 53
mov ebx, 3
mov ecx, [socketNum]
int 0x40 ; read byte
pop eax
; bl holds tftp opcode. Can only be 3 (data) or 5 ( error )
cmp bl, 3
jne cfrerr
push eax
; do data stuff. Read block #. Read data. Send Ack.
mov eax, 53
mov ebx, 3
mov ecx, [socketNum]
int 0x40 ; read byte
mov [blockNumber], bl
mov eax, 53
mov ebx, 3
mov ecx, [socketNum]
int 0x40 ; read byte
mov [blockNumber+1], bl
cfr007:
mov eax, 53
mov ebx, 2
mov ecx, [socketNum]
int 0x40 ; any more data?
cmp eax, 0
je no_more_data ; no
mov eax, 53
mov ebx, 3
mov ecx, [socketNum]
int 0x40 ; read byte
mov esi, [fileposition]
mov [esi], bl
inc dword [fileposition]
inc dword [filesize]
jmp cfr007
no_more_data:
; write the block number into the ack
mov al, [blockNumber]
mov [ack + 2], al
mov al, [blockNumber+1]
mov [ack + 3], al
; send an 'ack'
mov eax, 53
mov ebx, 4
mov ecx, [socketNum]
mov edx, ackLen - ack
mov esi, ack
int 0x40
; If # of chars in the frame is less that 516,
; this frame is the last
pop eax
cmp eax, 516
je cfr002
; Write the file
mov eax, 33
mov ebx, source
mov edx, [filesize]
mov ecx, I_END + 512
mov esi, 0
int 0x40
jmp cfrexit
cfrerr:
; simple implementation on error - just read all data, and return
mov eax, 53
mov ebx, 3
mov ecx, [socketNum]
int 0x40 ; read byte
mov eax, 53
mov ebx, 2
mov ecx, [socketNum]
int 0x40 ; any more data?
cmp eax, 0
jne cfrerr ; yes, so get it
jmp cfr006 ; close socket and close app
cfr003: ; redraw request
call draw_window
jmp cfr002
cfr004: ; key pressed
mov eax,2 ; just read it and ignore
int 0x40
jmp cfr002
cfr005: ; button
mov eax,17 ; get id
int 0x40
cmp ah,1 ; button id=1 ?
jne cfr002 ; If not, ignore.
cfr006:
; close socket
mov eax, 53
mov ebx, 1
mov ecx, [socketNum]
int 0x40
mov [socketNum], dword 0
mov eax,-1 ; close this program
int 0x40
jmp $
cfrexit:
; close socket
mov eax, 53
mov ebx, 1
mov ecx, [socketNum]
int 0x40
mov [socketNum], dword 0
mov dword [prompt], p4
mov dword [promptlen], p4len - p4
call draw_window ;
ret
;***************************************************************************
; Function
; copyToRemote
;
; Description
;
;***************************************************************************
copyToRemote:
mov eax,6 ; Read file from floppy (image)
mov ebx,source
mov ecx,0
mov edx,0xffffffff
mov esi,I_END + 512
int 0x40
cmp eax,0xffffffff
jnz filefound
mov dword [prompt], p6
mov dword [promptlen], p6len - p6
call draw_window ;
jmp ctr_exit
filefound:
mov [filesize], eax
; First, set up the file pointers
mov eax, 0x01000300
mov [blockBuffer], eax ; This makes sure our TFTP header is valid
mov eax, I_END + 512 ; This is the point where the file buffer is
mov [fileposition], eax
mov eax, [filesize]
cmp eax, 512
jb ctr000
mov eax, 512
ctr000:
mov [fileblocksize], ax
; Get a random # for the local socket port #
mov eax, 3
int 0x40
mov ecx, eax
shr ecx, 8 ; Set up the local port # with a random #
; First, open socket
mov eax, 53
mov ebx, 0
mov edx, 69 ; remote port
mov esi, [tftp_IP]
int 0x40
mov [socketNum], eax
; write to socket ( request write file )
mov eax, 53
mov ebx, 4
mov ecx, [socketNum]
mov edx, [tftp_len]
mov esi, tftp_filename
int 0x40
; now, we wait for
; UI redraw
; UI close
; or data from remote
ctr001:
mov eax,10 ; wait here for event
int 0x40
cmp eax,1 ; redraw request ?
je ctr003
cmp eax,2 ; key in buffer ?
je ctr004
cmp eax,3 ; button in buffer ?
je ctr005
; Any data in the UDP receive buffer?
mov eax, 53
mov ebx, 2
mov ecx, [socketNum]
int 0x40
cmp eax, 0
je ctr001
; Update the text on the display - once
mov eax, [prompt]
cmp eax, p2
je ctr002
mov dword [prompt], p2
mov dword [promptlen], p2len - p2
call draw_window ;
; we have data - this will be the ack
ctr002:
mov eax, 53
mov ebx, 3
mov ecx, [socketNum]
int 0x40 ; read byte - opcode
mov eax, 53
mov ebx, 3
mov ecx, [socketNum]
int 0x40 ; read byte - opcode
mov eax, 53
mov ebx, 3
mov ecx, [socketNum]
int 0x40 ; read byte - block (high byte)
mov [blockNumber], bl
mov eax, 53
mov ebx, 3
mov ecx, [socketNum]
int 0x40 ; read byte - block (low byte )
mov [blockNumber+1], bl
ctr0022:
mov eax, 53
mov ebx, 3
mov ecx, [socketNum]
int 0x40 ; read byte (shouldn't have worked)
mov eax, 53
mov ebx, 2
mov ecx, [socketNum]
int 0x40 ; any more data?
cmp eax, 0
jne ctr0022 ; yes, so get it, and dump it
; If the ack is 0, it is to the request
mov bx, [blockNumber]
cmp bx, 0
je txd
; now, the ack should be one more than the current field - otherwise, resend
cmp bx, [blockBuffer+2]
jne txre ; not the same, so send again
; update the block number
mov esi, blockBuffer + 3
mov al, [esi]
inc al
mov [esi], al
cmp al, 0
jne ctr008
dec esi
inc byte [esi]
ctr008:
; Move forward through the file
mov eax, [fileposition]
movzx ebx, word [fileblocksize]
add eax, ebx
mov [fileposition], eax
; new ..
; fs = 0 , fbs = 512 -> send with fbs = 0
cmp [filesize],0
jne no_special_end
cmp [fileblocksize],512
jne no_special_end
mov ax,0
jmp ctr006
no_special_end:
mov eax, [filesize]
cmp eax, 0
je ctr009
cmp eax, 512
jb ctr006
mov eax, 512
ctr006:
mov [fileblocksize], ax
txd:
; Readjust the file size variable ( before sending )
mov eax, [filesize]
movzx ebx, word [fileblocksize]
sub eax, ebx
mov [filesize], eax
txre:
; Copy the fragment of the file to the block buffer
movzx ecx, word [fileblocksize]
mov esi, [fileposition]
mov edi, I_END
cld
rep movsb
; send the file data
mov eax, 53
mov ebx, 4
mov ecx, [socketNum]
movzx edx, word [fileblocksize]
add edx, 4
mov esi, blockBuffer
int 0x40
jmp ctr001
ctr003: ; redraw
call draw_window
jmp ctr001
ctr004: ; key
mov eax,2 ; just read it and ignore
int 0x40
jmp ctr001
ctr005: ; button
mov eax,17 ; get id
int 0x40
cmp ah,1 ; button id=1 ?
jne ctr001
; close socket
mov eax, 53
mov ebx, 1
mov ecx, [socketNum]
int 0x40
mov [socketNum], dword 0
mov eax,-1 ; close this program
int 0x40
jmp $
ctr009:
; close socket
mov eax, 53
mov ebx, 1
mov ecx, [socketNum]
int 0x40
mov dword [prompt], p4
mov dword [promptlen], p4len - p4
call draw_window ;
ctr_exit:
ret
; *********************************************
; ******* WINDOW DEFINITIONS AND DRAW ********
; *********************************************
draw_window:
mov eax,12 ; function 12:tell os about windowdraw
mov ebx,1 ; 1, start of draw
int 0x40
; DRAW WINDOW
mov eax,0 ; function 0 : define and draw window
mov ebx,100*65536+230 ; [x start] *65536 + [x size]
mov ecx,100*65536+170 ; [y start] *65536 + [y size]
mov edx,0x13224466 ; color of work area RRGGBB
mov edi,labelt
int 0x40
mov eax,8 ; COPY BUTTON
mov ebx,20*65536+190
mov ecx,79*65536+15
mov edx,2
mov esi,0x557799
int 0x40
mov eax,8 ; DELETE BUTTON
mov ebx,20*65536+190
mov ecx,111*65536+15
mov edx,3
mov esi,0x557799
int 0x40
mov eax,8
mov ebx,200*65536+10
mov ecx,34*65536+10
mov edx,4
mov esi,0x557799
int 0x40
mov eax,8
mov ebx,200*65536+10
mov ecx,50*65536+10
mov edx,5
mov esi,0x557799
int 0x40
; Copy the file name to the screen buffer
; file name is same length as IP address, to
; make the math easier later.
cld
mov esi,source
mov edi,text+13
mov ecx,15
rep movsb
; copy the IP address to the screen buffer
mov esi,destination
mov edi,text+40+13
mov ecx,15
rep movsb
; copy the prompt to the screen buffer
mov esi,[prompt]
mov edi,text+280
mov ecx,[promptlen]
rep movsb
; Re-draw the screen text
cld
mov ebx,25*65536+35 ; draw info text with function 4
mov ecx,0xffffff
mov edx,text
mov esi,40
newline:
mov eax,4
int 0x40
add ebx,16
add edx,40
cmp [edx],byte 'x'
jnz newline
mov eax,12 ; function 12:tell os about windowdraw
mov ebx,2 ; 2, end of draw
int 0x40
ret
; DATA AREA
source db 'KERNEL.ASM '
destination db '192.168.1.23 '
tftp_filename: times 15 + 9 db 0
tftp_IP: dd 0
tftp_len: dd 0
addr dd 0x0
ya dd 0x0
fileposition dd 0 ; Points to the current point in the file
filesize dd 0 ; The number of bytes written / left to write
fileblocksize dw 0 ; The number of bytes to send in this frame
text:
db 'SOURCE FILE: xxxxxxxxxxxxxxx '
db 'HOST IP ADD: xxx.xxx.xxx.xxx '
db ' '
db ' COPY HOST -> LOCAL '
db ' '
db ' COPY LOCAL -> HOST '
db ' '
db ' '
db 'x' ; <- END MARKER, DONT DELETE
labelt db 'TFTP Client',0
prompt: dd 0
promptlen: dd 0
p1: db 'Waiting for Command'
p1len:
p2: db 'Sending File '
p2len:
p3: db 'Receiving File '
p3len:
p4: db 'Tranfer Complete '
p4len:
p5: db 'Contacting Host... '
p5len:
p6: db 'File not found. '
p6len:
ack:
db 00,04,0,1
ackLen:
socketNum:
dd 0
blockNumber:
dw 0
; This must be the last part of the file, because the blockBuffer
; continues at I_END.
blockBuffer:
db 00, 03, 00, 01
I_END: