1725 lines
37 KiB
NASM
1725 lines
37 KiB
NASM
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;
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; FTPS
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; FTP Server
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;
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; Compile with FASM for Menuet
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;
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; note: telnet == 23, ftp cmd == 21, data on 20
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use32
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org 0x0
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db 'MENUET01' ; 8 byte id
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dd 1 ; header version
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dd START ; program start
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dd I_END ; program image size
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dd 0x170000 ; required amount of memory
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dd 0x16FFF0 ; esp = 0x16FFF0
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dd 0, 0 ; no params, no path
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include '../../../macros.inc'
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; Various states of client connection
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USER_NONE equ 0 ; Awaiting a connection
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USER_CONNECTED equ 1 ; User just connected, prompt given
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USER_USERNAME equ 2 ; User given username
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USER_LOGGED_IN equ 3 ; User given password
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START: ; start of execution
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; Clear the screen memory
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mov eax, ' '
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mov edi,text
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mov ecx,80*30 /4
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cld
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rep stosd
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call draw_window
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; init the receive buffer pointer
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mov [buffptr], buff
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; Init FTP server state machine
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mov [state], USER_NONE
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; Open the listening socket
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call connect
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still:
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; check connection status
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mov eax,53
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mov ebx,6 ; Get socket status
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mov ecx,[CmdSocket]
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mcall
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mov ebx, [CmdSocketStatus]
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mov [CmdSocketStatus], eax
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cmp eax, ebx
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je waitev
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; If the socket closed by remote host, open it again.
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cmp eax, 7
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je con
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; If socket closed by Reset, open it again
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cmp eax, 11
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je con
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; If a user has just connected, start by outputting welcome msg
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cmp eax, 4
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jne noc
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mov esi, loginStr0
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mov edx, loginStr0_end - loginStr0
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call outputStr
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mov [state], USER_CONNECTED
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jmp noc
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con:
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; Need to call disconnect, since a remote close does not fully
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; close the socket
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call disconnect
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mov eax,5
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mov ebx,10 ; Delay for 100ms
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mcall
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call connect
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jmp noc
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noc:
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; Display the changed connected status
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call draw_window
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waitev:
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mov eax,23 ; wait here for event
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mov ebx,1 ; Delay for up to 1s
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mcall
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cmp eax,1 ; redraw request ?
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je red
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cmp eax,2 ; key in buffer ?
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je key
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cmp eax,3 ; button in buffer ?
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je button
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; any data from the socket?
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mov eax, 53
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mov ebx, 2 ; Get # of bytes in input queue
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mov ecx, [CmdSocket]
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mcall
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test eax, eax
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jz still
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read_input:
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mov eax, 53
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mov ebx, 3 ; Get a byte from socket in bl
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mov ecx, [CmdSocket]
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mcall
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call ftpRxCmdData ; process incoming ftp command
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; Keep processing data until there is no more to process
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mov eax, 53
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mov ebx, 2 ; Get # of bytes in input queue
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mov ecx, [CmdSocket]
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mcall
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cmp eax, 0
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jne read_input
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; Now redraw the text text field.
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; Probably not required, since ftp requires no
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; console i/o.
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; Leave in for now, for debugging.
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; (fall through to "red:")
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; call draw_text
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; jmp still
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red: ; REDRAW WINDOW
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call draw_window
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jmp still
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key: ; KEY
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mov eax,2 ; get but ignore
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mcall
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jmp still
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button:
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mov eax,17
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mcall
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cmp ah,1
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jne still
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; Exit button pressed, so close socket and quit
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mov eax,53
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mov ebx,8
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mov ecx,[CmdSocket]
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mcall
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; ... terminate program
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or eax,-1
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mcall
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jmp still
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; *********************************************
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; ******* WINDOW DEFINITIONS AND DRAW ********
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; *********************************************
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draw_window:
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pusha
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mov eax,12
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mov ebx,1
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mcall
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xor eax,eax ; DRAW WINDOW
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mov ebx,100*65536+491 + 8 +15
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mov ecx,100*65536+270 + 20 ; 20 for status bar
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mov edx,0x14000000
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mov edi,labelt
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mcall
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; draw status bar
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mov eax, 13
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mov ebx, 4*65536+484 + 8 +15
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mov ecx, 270*65536 + 3
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mov edx, 0x00557799
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mcall
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mov esi,contlen-contt ; display connected status
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mov edx, contt
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cmp [CmdSocketStatus], 4 ; 4 is connected
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je pcon
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mov esi,discontlen-discontt
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mov edx, discontt
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pcon:
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mov eax,4 ; status text
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mov ebx,380*65536+276
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mov ecx,0x00ffffff
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mcall
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; Draw the text on the screen, clearing it first
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; This can go when we loose debuggin info.
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xor eax,eax
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mov edi,text+80*30
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mov ecx,80*30 /4
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cld
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rep stosd
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call draw_text
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mov eax,12
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mov ebx,2
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mcall
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popa
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ret
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;***************************************************************************
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; Function
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; draw_text
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;
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; Description
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; Updates the text on the screen. This is part of the debugging code
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;
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; Inputs
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; Character to add in bl
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;
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;***************************************************************************
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draw_text:
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pusha
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mov esi,text
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mov eax,0
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mov ebx,0
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newletter:
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mov cl,[esi]
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cmp cl,[esi+30*80]
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jz noletter
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yesletter:
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mov [esi+30*80],cl
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; erase character
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pusha
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mov edx, 0 ; bg colour
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mov ecx, ebx
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add ecx, 26
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shl ecx, 16
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mov cx, 9
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mov ebx, eax
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add ebx, 6
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shl ebx, 16
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mov bx, 6
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mov eax, 13
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mcall
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popa
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; draw character
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pusha
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mov ecx, 0x00ffffff
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push bx
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mov ebx,eax
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add ebx,6
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shl ebx,16
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pop bx
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add bx,26
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mov eax,4
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mov edx,esi
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mov esi,1
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mcall
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popa
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noletter:
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add esi,1
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add eax,6
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cmp eax,80*6
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jb newletter
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mov eax,0
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add ebx,10
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cmp ebx,24*10
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jb newletter
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popa
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ret
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;***************************************************************************
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; Function
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; ftpRxCmdData
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;
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; Description
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; Prcoesses incoming command data, calling a handler for each command.
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; Commands are built up in buff before being processed.
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;
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; Inputs
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; Character to add in bl
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;
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;***************************************************************************
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ftpRxCmdData:
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; Quit if we are not connected
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;( This case shouldn't be necessary, but be safe )
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mov al, [state]
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cmp al, USER_NONE
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je frcd_exit
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; Store the incoming character
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mov esi, [buffptr]
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mov [esi], bl
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inc esi
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mov [buffptr], esi
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; For debugging, show the data coming in
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pusha
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call printChar
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popa
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; Do we have an end of line? (LF)
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; if not, just exit
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cmp bl, 0x0a
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jne frcd_exit
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; OK we have a complete command.
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; Process, and send response
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; There are a number of states involved in ftp,
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; to do with logging in.
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mov al, [state]
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cmp al, USER_CONNECTED
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jne fs001
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; This should be the username
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; TODO validate username
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; OK, username accepted - ask for password
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mov esi, loginStr1
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mov edx, loginStr1_end - loginStr1
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call outputStr
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mov [state], USER_USERNAME
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; init the receive buffer pointer
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mov [buffptr], buff
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jmp frcd_exit
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fs001:
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cmp al, USER_USERNAME
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jne fs002
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; This should be the password
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; TODO validate password
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; OK, password accepted - show they are logged in
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mov esi, loginStr2
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mov edx, loginStr2_end - loginStr2
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call outputStr
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mov [state], USER_LOGGED_IN
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; init the receive buffer pointer
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mov [buffptr], buff
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jmp frcd_exit
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fs002:
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cmp al, USER_LOGGED_IN
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jne fs003
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; This should be a cmd
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call findCmd
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mov eax, [cmdPtr]
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cmp eax, 0
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je fs002b
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call [cmdPtr]
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fs002a:
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; init the receive buffer pointer
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mov [buffptr], buff
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jmp frcd_exit
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fs002b:
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; an unsupported command was entered.
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; Tell user that the command is not supported
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mov esi, unsupStr
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mov edx, unsupStr_end - unsupStr
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call outputStr
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jmp fs002a
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fs003:
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frcd_exit:
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ret
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;***************************************************************************
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; Function
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; outputStr
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;
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; Description
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; Sends a string over the 'Command' socket
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;
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; Inputs
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; String in esi
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; Length in edx
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;
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;***************************************************************************
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outputStr:
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push esi
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push edx
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mov eax,53
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mov ebx,7
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mov ecx,[CmdSocket]
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mcall
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pop edx
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pop esi
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cmp eax, 0
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je os_exit
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; The TCP/IP transmit queue is full; Wait a bit, then retry
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pusha
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mov eax,5
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mov ebx,1 ; Delay for up 10ms
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mcall
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popa
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jmp outputStr
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os_exit:
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ret
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;***************************************************************************
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; Function
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; outputDataStr
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;
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; Description
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; Sends a string over the 'Data' socket
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;
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; Inputs
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; String in esi
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; Length in edx
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;
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;***************************************************************************
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outputDataStr:
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push esi
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push edx
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mov eax,53
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mov ebx,7
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mov ecx,[DataSocket]
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mcall
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pop edx
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pop esi
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cmp eax, 0
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je ods_exit
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; The TCP/IP transmit queue is full; Wait a bit, then retry
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pusha
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mov eax,5
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mov ebx,1 ; Delay for up 10ms
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mcall
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popa
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jmp outputDataStr
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ods_exit:
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ret
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;***************************************************************************
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; Function
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; printChar
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;
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; Description
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; Writes a character to the screen; Used to display the data coming
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; in from the user. Really only useful for debugging.
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;
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; Inputs
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; Character in bl
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;
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;***************************************************************************
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printChar:
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cmp bl,13 ; BEGINNING OF LINE
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jne nobol
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mov ecx,[pos]
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add ecx,1
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boll1:
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sub ecx,1
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mov eax,ecx
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xor edx,edx
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mov ebx,80
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div ebx
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cmp edx,0
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jne boll1
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mov [pos],ecx
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jmp newdata
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nobol:
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cmp bl,10 ; LINE DOWN
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jne nolf
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addx1:
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add [pos],dword 1
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mov eax,[pos]
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xor edx,edx
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mov ecx,80
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div ecx
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cmp edx,0
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jnz addx1
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mov eax,[pos]
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jmp cm1
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nolf:
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cmp bl,8 ; BACKSPACE
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jne nobasp
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mov eax,[pos]
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dec eax
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mov [pos],eax
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mov [eax+text],byte 32
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mov [eax+text+60*80],byte 0
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jmp newdata
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nobasp:
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cmp bl,15 ; CHARACTER
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jbe newdata
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putcha:
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mov eax,[pos]
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mov [eax+text],bl
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mov eax,[pos]
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add eax,1
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cm1:
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mov ebx,[scroll+4]
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imul ebx,80
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cmp eax,ebx
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jb noeaxz
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mov esi,text+80
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mov edi,text
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mov ecx,ebx
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cld
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rep movsb
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mov eax,ebx
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sub eax,80
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noeaxz:
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mov [pos],eax
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newdata:
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ret
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;***************************************************************************
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; Function
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; disconnect
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;
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; Description
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; Closes the command socket
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;
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; Inputs
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; None
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;
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;***************************************************************************
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disconnect:
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mov eax, 53 ; Stack Interface
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mov ebx,8 ; Close TCP socket
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mov ecx,[CmdSocket]
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mcall
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ret
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;***************************************************************************
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; Function
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; disconnectData
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;
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; Description
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; Closes the data socket
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;
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; Inputs
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; None
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;
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;***************************************************************************
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disconnectData:
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; This delay would be better done by allowing the socket code
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; to wait for all data to pass through the stack before closing
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pusha
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mov eax,5
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mov ebx,10 ; Delay for 100ms
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mcall
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popa
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mov eax, 53 ; Stack Interface
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mov ebx,8 ; Close TCP socket
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mov ecx,[DataSocket]
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mcall
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ret
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;***************************************************************************
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; Function
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; connect
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;
|
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; Description
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; Opens the command socket
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;
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; Inputs
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; None
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;
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;***************************************************************************
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connect:
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pusha
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mov eax, 53 ; Stack Interface
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mov ebx, 5 ; Open TCP socket
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mov esi, 0 ; No remote IP address
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mov edx, 0 ; No remote port
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mov ecx, 21 ; ftp command port id
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mov edi, 0 ; passive open
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mcall
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mov [CmdSocket], eax
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popa
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ret
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;***************************************************************************
|
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; Function
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; connectData
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;
|
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; Description
|
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; Opens the data socket
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;
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; Inputs
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; None
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;
|
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;***************************************************************************
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connectData:
|
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pusha
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|
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mov eax, 53 ; Stack Interface
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mov ebx, 5 ; Open TCP socket
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mov esi, [DataIP] ; remote IP address
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mov edx, [DataPort] ; remote port
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mov ecx, 0 ; ftp data port id
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mov edi, 1 ; active open
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mcall
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mov [DataSocket], eax
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popa
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ret
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|
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;***************************************************************************
|
|
; Function
|
|
; findCmd
|
|
;
|
|
; Description
|
|
; Scans the command string for a valid command. The command string
|
|
; is in the global variable buff.
|
|
;
|
|
; Returns result in cmdPtr. This will be zero if none found
|
|
;
|
|
; Inputs
|
|
; None
|
|
;
|
|
;***************************************************************************
|
|
findCmd:
|
|
; Setup to return 'none' in cmdPtr, if we find no cmd
|
|
mov eax, 0
|
|
mov [cmdPtr], eax
|
|
cld
|
|
mov esi, buff
|
|
mov edi, CMDList
|
|
|
|
fc000:
|
|
cmp [edi], byte 0 ; Are we at the end of the CMDList?
|
|
je fc_exit
|
|
|
|
fc000a:
|
|
cmpsb
|
|
|
|
je fc_nextbyte
|
|
|
|
; Command is different - move to the next entry in cmd table
|
|
mov esi, buff
|
|
|
|
fc001:
|
|
; skip to the next command in the list
|
|
cmp [edi], byte 0
|
|
je fc002
|
|
inc edi
|
|
jmp fc001
|
|
fc002:
|
|
add edi, 5
|
|
jmp fc000
|
|
|
|
fc_nextbyte:
|
|
; Have we reached the end of the CMD text?
|
|
cmp [edi], byte 0
|
|
je fc_got ; Yes - so we have a match
|
|
jmp fc000a ; No - loop back
|
|
|
|
fc_got:
|
|
; Copy the function pointer for the selected command
|
|
inc edi
|
|
mov eax, [edi]
|
|
mov [cmdPtr], eax
|
|
|
|
fc_exit:
|
|
ret
|
|
|
|
|
|
|
|
;***************************************************************************
|
|
; Function
|
|
; decStr2Byte
|
|
;
|
|
; Description
|
|
; Converts the decimal string pointed to by esi to a byte
|
|
;
|
|
; Inputs
|
|
; string ptr in esi
|
|
;
|
|
; Outputs
|
|
; esi points to next character not in string
|
|
; eax holds result ( 0..255)
|
|
;
|
|
;***************************************************************************
|
|
decStr2Byte:
|
|
xor eax, eax
|
|
xor ebx, ebx
|
|
mov ecx, 3
|
|
|
|
dsb001:
|
|
mov bl, [esi]
|
|
|
|
cmp bl, '0'
|
|
jb dsb_exit
|
|
cmp bl, '9'
|
|
ja dsb_exit
|
|
|
|
imul eax, 10
|
|
add eax, ebx
|
|
sub eax, '0'
|
|
inc esi
|
|
loop dsb001
|
|
|
|
dsb_exit:
|
|
ret
|
|
|
|
|
|
|
|
;***************************************************************************
|
|
; Function
|
|
; parsePortStr
|
|
;
|
|
; Description
|
|
; Converts the parameters of the PORT command, and stores them in the
|
|
; appropriate variables.
|
|
;
|
|
; Inputs
|
|
; None ( string in global variable buff )
|
|
;
|
|
; Outputs
|
|
; None
|
|
;
|
|
;***************************************************************************
|
|
parsePortStr:
|
|
; skip past the PORT text to get the the parameters. The command format
|
|
; is
|
|
; PORT i,i,i,i,p,p,0x0d,0x0a
|
|
; where i and p are decimal byte values, high byte first.
|
|
xor eax, eax
|
|
mov [DataIP], eax
|
|
mov [DataPort], eax
|
|
mov esi, buff + 4 ; Start at first space character
|
|
|
|
pps001:
|
|
cmp [esi], byte ' ' ; Look for first non space character
|
|
jne pps002
|
|
inc esi
|
|
jmp pps001
|
|
|
|
pps002:
|
|
call decStr2Byte
|
|
add [DataIP], eax
|
|
ror dword [DataIP], 8
|
|
inc esi
|
|
call decStr2Byte
|
|
add [DataIP], eax
|
|
ror dword [DataIP], 8
|
|
inc esi
|
|
call decStr2Byte
|
|
add [DataIP], eax
|
|
ror dword [DataIP], 8
|
|
inc esi
|
|
call decStr2Byte
|
|
add [DataIP], eax
|
|
ror dword [DataIP], 8
|
|
inc esi
|
|
call decStr2Byte
|
|
add [DataPort], eax
|
|
shl [DataPort], 8
|
|
inc esi
|
|
call decStr2Byte
|
|
add [DataPort], eax
|
|
|
|
ret
|
|
|
|
|
|
|
|
;***************************************************************************
|
|
; Function
|
|
; sendDir
|
|
;
|
|
; Description
|
|
; Transmits the directory listing over the data connection.
|
|
; The data connection is already open.
|
|
;
|
|
; Inputs
|
|
; None
|
|
;
|
|
; Outputs
|
|
; None
|
|
;
|
|
;***************************************************************************
|
|
sendDir:
|
|
mov eax, text+0x4000
|
|
mov [fsize], eax
|
|
mov ebx, dirinfoblock
|
|
and dword [ebx+4], 0 ; start from zero block
|
|
sd001:
|
|
; Read the next DirBlocksPerCall (=16) blocks
|
|
mov eax, 70
|
|
mcall
|
|
; Did we read anything?
|
|
test eax, eax
|
|
jz @f
|
|
cmp eax, 6
|
|
jnz sd_exit
|
|
@@:
|
|
test ebx, ebx
|
|
jz sd_exit
|
|
; Parse these blocks. There could be up to 16 files specified
|
|
mov esi, text + 0x1300 + 0x20
|
|
sd002:
|
|
dec ebx
|
|
js sd004
|
|
push ebx
|
|
; OK, lets parse the entry. Ignore volume entries
|
|
test byte [esi], 8
|
|
jnz sd003
|
|
; Valid file or directory. Start to compose the string we will send
|
|
mov edi, dirStr
|
|
; If we have been called as a result of an NLST command, we only display
|
|
; the filename
|
|
cmp [buff], byte 'N'
|
|
jz sd006
|
|
|
|
mov [edi], byte '-'
|
|
test byte [esi], 10h
|
|
jz @f
|
|
mov [edi], byte 'd'
|
|
@@:
|
|
; Ok, now copy across the directory listing text that will be constant
|
|
; ( I dont bother looking at the read only or archive bits )
|
|
|
|
mov ebx, tmplStr
|
|
@@:
|
|
inc edi
|
|
mov al, [ebx]
|
|
test al, al
|
|
jz @f
|
|
mov [edi], al
|
|
inc ebx
|
|
jmp @b
|
|
@@:
|
|
; point to the last character of the string;
|
|
; We will write the file size here, backwards
|
|
push edi ; Remember where the string ends
|
|
|
|
dec edi
|
|
; eax holds the number
|
|
mov eax, [esi+32]
|
|
mov ebx, 10
|
|
@@:
|
|
xor edx, edx
|
|
div ebx
|
|
add dl, '0'
|
|
mov [edi], dl
|
|
dec edi
|
|
test eax, eax
|
|
jnz @b
|
|
|
|
pop edi
|
|
; now create the time & date fields
|
|
;timeStr: db ' Jan 1 2000 ',0
|
|
mov al, ' '
|
|
stosb
|
|
movzx eax, byte [esi+28+1]
|
|
mov eax, dword [months + (eax-1)*4]
|
|
stosd
|
|
mov al, byte [esi+28]
|
|
aam
|
|
test ah, ah
|
|
jz sd005a
|
|
xchg al, ah
|
|
add ax, '00'
|
|
jmp sd005b
|
|
sd005a:
|
|
add al, '0'
|
|
mov ah, ' '
|
|
sd005b:
|
|
stosw
|
|
mov al, ' '
|
|
mov ecx, 6
|
|
rep stosb
|
|
push edi
|
|
movzx eax, word [esi+28+2]
|
|
@@:
|
|
xor edx, edx
|
|
div ebx
|
|
add dl, '0'
|
|
mov [edi], dl
|
|
dec edi
|
|
test eax, eax
|
|
jnz @b
|
|
pop edi
|
|
inc edi
|
|
mov al, ' '
|
|
stosb
|
|
sd006:
|
|
; ** End of copying
|
|
|
|
; now copy the filename across
|
|
lea ebx, [esi+40]
|
|
@@:
|
|
mov al, [ebx]
|
|
inc ebx
|
|
test al, al
|
|
jz @f
|
|
stosb
|
|
jmp @b
|
|
@@:
|
|
terminate:
|
|
; Now terminate the line by putting CRLF sequence in
|
|
mov al, 0x0D
|
|
stosb
|
|
mov al, 0x0A
|
|
stosb
|
|
; Send the completed line to the user over data socket
|
|
push esi
|
|
push edi
|
|
mov esi, dirStr
|
|
mov ecx, edi
|
|
sub ecx, esi
|
|
mov edi, [fsize]
|
|
cld
|
|
rep movsb
|
|
mov [fsize], edi
|
|
cmp edi, text+0x4400
|
|
jb @f
|
|
mov esi, text+0x4000
|
|
mov edx, [fsize]
|
|
sub edx, esi
|
|
mov [fsize], esi
|
|
call outputDataStr
|
|
|
|
@@:
|
|
pop edi
|
|
pop esi
|
|
|
|
sd003: ; Move to next entry in the block
|
|
pop ebx
|
|
add esi, 304
|
|
jmp sd002
|
|
sd004:
|
|
mov ebx, dirinfoblock
|
|
add dword [ebx+4], DirBlocksPerCall
|
|
jmp sd001
|
|
|
|
sd_exit:
|
|
mov esi, text+0x4000
|
|
mov edx, [fsize]
|
|
sub edx, esi
|
|
call outputDataStr
|
|
ret
|
|
|
|
|
|
|
|
|
|
|
|
;***************************************************************************
|
|
; Function
|
|
; setupFilePath
|
|
;
|
|
; Description
|
|
; Copies the file name from the input request string into the
|
|
; file descriptor
|
|
;
|
|
; Inputs
|
|
; None
|
|
;
|
|
; Outputs
|
|
; None
|
|
;
|
|
;***************************************************************************
|
|
setupFilePath:
|
|
mov esi, buff + 4 ; Point to (1 before) first character of file
|
|
|
|
; Skip any trailing spaces or / character
|
|
sfp001:
|
|
inc esi
|
|
cmp [esi], byte ' '
|
|
je sfp001
|
|
cmp [esi], byte '/'
|
|
je sfp001
|
|
|
|
; esi points to start of filename.
|
|
cld
|
|
push esi
|
|
|
|
; Copy across the directory path '/'
|
|
; into the fileinfoblock
|
|
mov esi, dirpath
|
|
mov edi, filename
|
|
sfp003:
|
|
movsb
|
|
cmp [esi], byte 0
|
|
jne sfp003
|
|
mov al, '/'
|
|
stosb
|
|
pop esi
|
|
|
|
; Copy across the filename
|
|
sfp002:
|
|
movsb
|
|
cmp [esi], byte 0x0d
|
|
jne sfp002
|
|
mov [edi], byte 0
|
|
ret
|
|
|
|
|
|
|
|
|
|
;***************************************************************************
|
|
; Function
|
|
; sendFile
|
|
;
|
|
; Description
|
|
; Transmits the requested file over the open data socket
|
|
; The file to send is named in the buff string
|
|
;
|
|
; Inputs
|
|
; None
|
|
;
|
|
; Outputs
|
|
; None
|
|
;
|
|
;***************************************************************************
|
|
sendFile:
|
|
call setupFilePath
|
|
|
|
; init fileblock descriptor, for file read
|
|
mov ebx, fileinfoblock
|
|
and dword [ebx], 0 ; read cmd
|
|
and dword [ebx+4], 0 ; first block
|
|
mov dword [ebx+12], 0x400 ; block size
|
|
|
|
sf002a:
|
|
; now read the file..
|
|
mov eax,70
|
|
mcall
|
|
test eax, eax
|
|
jz @f
|
|
cmp eax, 6
|
|
jnz sf_exit
|
|
@@:
|
|
push eax
|
|
mov esi, text + 0x1300
|
|
mov edx, ebx
|
|
call outputDataStr
|
|
pop eax
|
|
test eax, eax
|
|
jnz sf_exit
|
|
; wait a bit
|
|
mov eax, 5
|
|
mov ebx, 1
|
|
mcall
|
|
mov ebx, fileinfoblock
|
|
add dword [ebx+4], edx
|
|
jmp sf002a
|
|
|
|
sf_exit:
|
|
ret
|
|
|
|
|
|
;***************************************************************************
|
|
; Function
|
|
; getFile
|
|
;
|
|
; Description
|
|
; Receives the specified file over the open data socket
|
|
; The file to receive is named in the buff string
|
|
;
|
|
; Inputs
|
|
; None
|
|
;
|
|
; Outputs
|
|
; None
|
|
;
|
|
;***************************************************************************
|
|
getFile:
|
|
call setupFilePath
|
|
|
|
; init fileblock descriptor, for file write
|
|
xor eax, eax
|
|
mov [fsize], eax ; Start filelength at 0
|
|
mov [fileinfoblock+4], eax ; set to 0
|
|
inc eax
|
|
inc eax
|
|
mov [fileinfoblock], eax ; write cmd
|
|
|
|
; Read data from the socket until the socket closes
|
|
; loop
|
|
; loop
|
|
; read byte from socket
|
|
; write byte to file buffer
|
|
; until no more bytes in socket
|
|
; sleep 100ms
|
|
; until socket no longer connected
|
|
; write file to ram
|
|
|
|
gf000:
|
|
mov eax, 53
|
|
mov ebx, 2 ; Get # of bytes in input queue
|
|
mov ecx, [DataSocket]
|
|
mcall
|
|
test eax, eax
|
|
je gf_sleep
|
|
|
|
mov eax, 53
|
|
mov ebx, 11 ; Get bytes from socket
|
|
mov ecx, [DataSocket]
|
|
mov edx, text + 0x1300
|
|
add edx, dword [fsize]
|
|
xor esi, esi
|
|
mcall ; returned data len in eax
|
|
add dword [fsize], eax
|
|
|
|
jmp gf000
|
|
|
|
gf_sleep:
|
|
; Check to see if socket closed...
|
|
mov eax,53
|
|
mov ebx,6 ; Get socket status
|
|
mov ecx,[DataSocket]
|
|
mcall
|
|
|
|
cmp eax, 7
|
|
jne gf001 ; still open, so just sleep a bit
|
|
|
|
; Finished, so write the file
|
|
mov eax, [fsize]
|
|
mov [fileinfoblock+12], eax
|
|
mov eax,70
|
|
mov ebx,fileinfoblock
|
|
mcall
|
|
|
|
ret ; Finished
|
|
|
|
gf001:
|
|
; wait a bit
|
|
mov eax,5
|
|
mov ebx,1 ; Delay for up 10ms
|
|
mcall
|
|
jmp gf000 ; try for more data
|
|
|
|
|
|
|
|
|
|
|
|
;***************************************************************************
|
|
; COMMAND HANDLERS FOLLOW
|
|
;
|
|
; These handlers implement the functionality of each supported FTP Command
|
|
;
|
|
;***************************************************************************
|
|
|
|
cmdPWD:
|
|
cld
|
|
mov edi, text+0x1300
|
|
|
|
mov esi, curdir_1
|
|
mov ecx, curdir_2-curdir_1
|
|
rep movsb
|
|
|
|
mov esi, [curdirptr]
|
|
cmp [esi], byte 0
|
|
jne cpwd_000
|
|
mov al, '/'
|
|
stosb
|
|
jmp cpwd_001
|
|
|
|
cpwd_000:
|
|
movsb
|
|
cmp [esi], byte 0
|
|
jne cpwd_000
|
|
|
|
cpwd_001:
|
|
mov esi, curdir_2
|
|
mov ecx, curdir_end-curdir_2
|
|
rep movsb
|
|
|
|
; OK, show the directory name text
|
|
mov esi, text+0x1300
|
|
mov edx, edi
|
|
sub edx, esi
|
|
call outputStr
|
|
|
|
ret
|
|
|
|
|
|
cmdCWD:
|
|
lea esi, [buff+4]
|
|
mov edi, [curdirptr]
|
|
mov ecx, -1
|
|
xor eax, eax
|
|
repne scasb
|
|
dec edi
|
|
cmp [esi], word '..'
|
|
je ccwd_002
|
|
test [esi], byte 0xE0
|
|
je ccwd_000
|
|
push edi
|
|
mov al, '/'
|
|
stosb
|
|
@@:
|
|
movsb
|
|
cmp [esi], byte 0xD
|
|
jne @b
|
|
xor al, al
|
|
stosb
|
|
|
|
mov eax, 70
|
|
mov ebx, dirinfoblock
|
|
and dword [ebx+4], 0
|
|
mcall
|
|
pop edi
|
|
test eax, eax
|
|
je @f
|
|
cmp eax, 6
|
|
jne ccwd_000
|
|
@@:
|
|
test ebx, ebx
|
|
je ccwd_000
|
|
mov esi, text + 0x1300 + 0x20
|
|
|
|
mov al, byte [esi]
|
|
and al, 0x18
|
|
cmp al, 0x10
|
|
jne ccwd_000
|
|
|
|
ccwd_ok:
|
|
; OK, show the directory name text
|
|
mov esi, chdir
|
|
mov edx, chdir_end - chdir
|
|
jmp ccwd_001
|
|
|
|
ccwd_002:
|
|
dec edi
|
|
cmp byte [edi], '/'
|
|
je ccwd_003
|
|
cmp edi, [curdirptr]
|
|
ja ccwd_002
|
|
jmp ccwd_ok
|
|
ccwd_003:
|
|
mov byte [edi], 0
|
|
jmp ccwd_ok
|
|
|
|
ccwd_000:
|
|
mov byte [edi], 0
|
|
; Tell user there is no such directory
|
|
mov esi, noFileStr
|
|
mov edx, noFileStr_end - noFileStr
|
|
|
|
ccwd_001:
|
|
call outputStr
|
|
|
|
ret
|
|
|
|
|
|
cmdQUIT:
|
|
; The remote end will do the close; We just
|
|
; say goodbye.
|
|
mov esi, byeStr
|
|
mov edx, byeStr_end - byeStr
|
|
call outputStr
|
|
ret
|
|
|
|
|
|
cmdABOR:
|
|
|
|
; Close port
|
|
call disconnectData
|
|
|
|
mov esi, abortStr
|
|
mov edx, abortStr_end - abortStr
|
|
call outputStr
|
|
|
|
ret
|
|
|
|
cmdPORT:
|
|
; TODO
|
|
; Copy the IP and port values to DataIP and DataPort
|
|
|
|
call parsePortStr
|
|
|
|
; Indicate the command was accepted
|
|
mov esi, cmdOKStr
|
|
mov edx, cmdOKStr_end - cmdOKStr
|
|
call outputStr
|
|
ret
|
|
|
|
cmdnoop:
|
|
; Indicate the command was accepted
|
|
mov esi, cmdOKStr
|
|
mov edx, cmdOKStr_end - cmdOKStr
|
|
call outputStr
|
|
ret
|
|
|
|
|
|
cmdTYPE:
|
|
; TODO
|
|
; Note the type field selected - reject if needed.
|
|
|
|
; Indicate the command was accepted
|
|
mov esi, cmdOKStr
|
|
mov edx, cmdOKStr_end - cmdOKStr
|
|
call outputStr
|
|
ret
|
|
|
|
cmdsyst:
|
|
; Indicate the system type
|
|
mov esi, systStr
|
|
mov edx, systStr_end - systStr
|
|
call outputStr
|
|
ret
|
|
|
|
|
|
cmdDELE:
|
|
call setupFilePath
|
|
|
|
mov ebx, fileinfoblock
|
|
mov dword [ebx], 8
|
|
and dword [ebx+4], 0
|
|
push dword [ebx+12]
|
|
push dword [ebx+16]
|
|
and dword [ebx+12], 0
|
|
and dword [ebx+16], 0
|
|
mov eax, 70
|
|
mcall
|
|
mov ebx, fileinfoblock
|
|
pop dword [ebx+16]
|
|
pop dword [ebx+12]
|
|
|
|
test eax, eax
|
|
jne cmdDele_err
|
|
|
|
mov esi, delokStr
|
|
mov edx, delokStr_end - delokStr
|
|
call outputStr
|
|
|
|
jmp cmdDele_exit
|
|
|
|
cmdDele_err:
|
|
mov esi, noFileStr
|
|
mov edx, noFileStr_end - noFileStr
|
|
call outputStr
|
|
|
|
|
|
cmdDele_exit:
|
|
ret
|
|
|
|
|
|
cmdNLST:
|
|
cmdLIST:
|
|
; Indicate the command was accepted
|
|
mov esi, startStr
|
|
mov edx, startStr_end - startStr
|
|
call outputStr
|
|
|
|
call connectData
|
|
|
|
; Wait for socket to establish
|
|
|
|
cl001:
|
|
; wait a bit
|
|
mov eax,5
|
|
mov ebx,10 ; Delay for up 100ms
|
|
mcall
|
|
|
|
; check connection status
|
|
mov eax,53
|
|
mov ebx,6 ; Get socket status
|
|
mov ecx,[DataSocket]
|
|
mcall
|
|
|
|
cmp eax, 4
|
|
jne cl001
|
|
|
|
; send directory listing
|
|
call sendDir
|
|
|
|
; Close port
|
|
call disconnectData
|
|
|
|
mov esi, endStr
|
|
mov edx, endStr_end - endStr
|
|
call outputStr
|
|
ret
|
|
|
|
cmdRETR:
|
|
; Indicate the command was accepted
|
|
mov esi, startStr
|
|
mov edx, startStr_end - startStr
|
|
call outputStr
|
|
|
|
call connectData
|
|
|
|
; Wait for socket to establish
|
|
|
|
cr001:
|
|
; wait a bit
|
|
mov eax,5
|
|
mov ebx,10 ; Delay for up 100ms
|
|
mcall
|
|
|
|
; check connection status
|
|
mov eax,53
|
|
mov ebx,6 ; Get socket status
|
|
mov ecx,[DataSocket]
|
|
mcall
|
|
|
|
cmp eax, 4
|
|
jne cr001
|
|
|
|
; send data to remote user
|
|
call sendFile
|
|
|
|
; Close port
|
|
call disconnectData
|
|
|
|
mov esi, endStr
|
|
mov edx, endStr_end - endStr
|
|
call outputStr
|
|
|
|
|
|
ret
|
|
|
|
|
|
cmdSTOR:
|
|
; Indicate the command was accepted
|
|
mov esi, storStr
|
|
mov edx, storStr_end - storStr
|
|
call outputStr
|
|
|
|
call connectData
|
|
|
|
; Wait for socket to establish
|
|
|
|
cs001:
|
|
; wait a bit
|
|
mov eax,5
|
|
mov ebx,10 ; Delay for up 100ms
|
|
mcall
|
|
|
|
; check connection status
|
|
mov eax,53
|
|
mov ebx,6 ; Get socket status
|
|
mov ecx,[DataSocket]
|
|
mcall
|
|
|
|
cmp eax, 4
|
|
je @f
|
|
cmp eax, 7
|
|
jne cs001
|
|
@@:
|
|
|
|
; get data file from remote user
|
|
call getFile
|
|
|
|
mov esi, endStr
|
|
mov edx, endStr_end - endStr
|
|
call outputStr
|
|
|
|
; Close port
|
|
call disconnectData
|
|
|
|
ret
|
|
|
|
|
|
|
|
; DATA AREA
|
|
|
|
; This is the list of supported commands, and the function to call
|
|
; The list end with a NULL.
|
|
CMDList:
|
|
db 'pwd',0
|
|
dd cmdPWD
|
|
|
|
db 'PWD',0
|
|
dd cmdPWD
|
|
|
|
db 'XPWD',0
|
|
dd cmdPWD
|
|
|
|
db 'xpwd',0
|
|
dd cmdPWD
|
|
|
|
db 'QUIT',0
|
|
dd cmdQUIT
|
|
|
|
db 'quit',0
|
|
dd cmdQUIT
|
|
|
|
db 'PORT',0
|
|
dd cmdPORT
|
|
|
|
db 'port',0
|
|
dd cmdPORT
|
|
|
|
db 'LIST',0
|
|
dd cmdLIST
|
|
|
|
db 'list',0
|
|
dd cmdLIST
|
|
|
|
db 'NLST',0
|
|
dd cmdNLST
|
|
|
|
db 'nlst',0
|
|
dd cmdNLST
|
|
|
|
db 'TYPE',0
|
|
dd cmdTYPE
|
|
|
|
db 'type',0
|
|
dd cmdTYPE
|
|
|
|
db 'syst',0
|
|
dd cmdsyst
|
|
|
|
db 'noop',0
|
|
dd cmdnoop
|
|
|
|
db 'CWD',0
|
|
dd cmdCWD
|
|
|
|
db 'cwd',0
|
|
dd cmdCWD
|
|
|
|
db 'RETR',0
|
|
dd cmdRETR
|
|
|
|
db 'retr',0
|
|
dd cmdRETR
|
|
|
|
db 'DELE',0
|
|
dd cmdDELE
|
|
|
|
db 'dele',0
|
|
dd cmdDELE
|
|
|
|
db 'stor',0
|
|
dd cmdSTOR
|
|
|
|
db 'STOR',0
|
|
dd cmdSTOR
|
|
|
|
db 'ABOR',0
|
|
dd cmdABOR
|
|
|
|
db 'abor',0
|
|
dd cmdABOR
|
|
|
|
db 0xff,0xf4,0xff,0xf2,'ABOR',0
|
|
dd cmdABOR
|
|
|
|
db 0
|
|
|
|
|
|
cmdPtr dd 0
|
|
CmdSocket dd 0x0
|
|
CmdSocketStatus dd 0x0
|
|
DataSocket dd 0x0
|
|
DataSocketStatus dd 0x0
|
|
DataPort dd 0x00
|
|
DataIP dd 0x00
|
|
pos dd 80 * 1
|
|
scroll dd 1
|
|
dd 24
|
|
|
|
labelt db 'FTP Server v0.1',0
|
|
contt db 'Connected'
|
|
contlen:
|
|
discontt db 'Disconnected'
|
|
discontlen:
|
|
|
|
cmdOKStr: db '200 Command OK',0x0d,0x0a
|
|
cmdOKStr_end:
|
|
|
|
loginStr0: db '220- Menuet FTP Server v0.1',0x0d,0x0a
|
|
db '220 Username and Password required',0x0d,0x0a
|
|
loginStr0_end:
|
|
|
|
loginStr1: db '331 Password now required',0x0d,0x0a
|
|
loginStr1_end:
|
|
|
|
loginStr2: db '230 You are now logged in.',0x0d,0x0a
|
|
loginStr2_end:
|
|
|
|
byeStr: db '221 Bye bye!',0x0d,0x0a
|
|
byeStr_end:
|
|
|
|
systStr: db '215 UNIX system type',0x0d,0x0a
|
|
systStr_end:
|
|
|
|
curdir_1: db '257 "'
|
|
curdir_2: db '"',0x0d,0x0a
|
|
curdir_end:
|
|
|
|
chdir: db '250 CWD command successful',0x0d,0x0a
|
|
chdir_end:
|
|
|
|
unsupStr: db '500 Unsupported command',0x0d,0x0a
|
|
unsupStr_end:
|
|
|
|
noFileStr: db '550 No such file',0x0d,0x0a
|
|
noFileStr_end:
|
|
|
|
delokStr: db '250 DELE command successful',0x0d,0x0a
|
|
delokStr_end:
|
|
|
|
startStr: db '150 Here it comes...',0x0d,0x0a
|
|
startStr_end:
|
|
|
|
storStr: db '150 Connecting for STOR',0x0d,0x0a
|
|
storStr_end:
|
|
|
|
endStr: db '226 Transfer OK, Closing connection',0x0d,0x0a
|
|
endStr_end:
|
|
|
|
abortStr: db '225 Abort successful',0x0d,0x0a
|
|
abortStr_end:
|
|
|
|
; This is the buffer used for building up a directory listing line
|
|
dirStr: times 128 db 0
|
|
|
|
; This is template string used in building up a directory listing line
|
|
tmplStr: db 'rw-rw-rw- 1 0 0 ',0
|
|
|
|
months:
|
|
dd 'Jan ','Feb ','Mar ','Apr ','May ','Jun '
|
|
dd 'Jul ','Aug ','Sep ','Oct ','Nov ','Dec '
|
|
|
|
fileinfoblock:
|
|
dd 0x00
|
|
dd 0x00
|
|
dd 0x00
|
|
dd 0x200 ; bytes to read
|
|
dd text + 0x1300 ; data area
|
|
filename: times 256 db 0
|
|
|
|
; The following lines define data for reading a directory block
|
|
DirBlocksPerCall = 16
|
|
dirinfoblock:
|
|
dd 1
|
|
dd 0x00
|
|
dd 0x00
|
|
dd DirBlocksPerCall
|
|
dd text + 0x1300 ; data area
|
|
; The 'filename' for a directory listing
|
|
dirpath: db '/sys'
|
|
times 252 db 0
|
|
curdirptr: dd dirpath+4
|
|
|
|
fsize: dd 0
|
|
|
|
state db 0
|
|
buffptr dd 0
|
|
buff: times 256 db 0 ; Could put this after iend
|
|
|
|
; Ram use at the end of the application:
|
|
; text : 2400 bytes for screen memory
|
|
; text + 0x1300 : file data area
|
|
text:
|
|
I_END:
|