struct thread_data
rb 1024
stack rb 0
home_dir rb 1024 ; home directory in wich the user is locked, asciiz
work_dir rb 1024 ; working directory, must at all times begin and end with a '/', asciiz
fpath rb 1024*3 ; file path, combination of home_dir, work_dir and filename
; Will also be used to temporarily store username
type db ? ; ASCII/EBDIC/IMAGE/..
mode db ? ; active/passive
socketnum dd ? ; Commands socket
state dd ? ; disconnected/logging in/logged in/..
passivesocknum dd ? ; when in passive mode, this is the listening socket
datasocketnum dd ? ; socket used for data transfers
permissions dd ? ; read/write/execute/....
buffer_ptr dd ?
pid dd ? ; Process id of the current thread
datasock sockaddr_in
buffer rb BUFFERSIZE
ends
macro sendFTP str {
local .string, .length, .label
xor edi, edi
mcall send, [ebp + thread_data.socketnum], .string, .length
jmp @f
.string db str, 13, 10
.length = $ - .string
@@:
}
;------------------------------------------------
; parse_cmd
;
; Internal function wich uses the 'commands'
; table to call an appropriate cmd_xx function.
;
; input: esi = ptr to ascii commands
; ecx = number of bytes input
; ebp = pointer to thread_data structure
;
; output: none
;
;------------------------------------------------
align 4
parse_cmd: ; esi must point to command
cmp byte [esi], 0x20 ; skip all leading characters
ja .ok
inc esi
dec ecx
cmp ecx, 3
jb .error
jmp parse_cmd
.ok:
cmp byte [esi+3], 0x20
ja @f
mov byte [esi+3], 0
@@:
mov eax, [esi]
and eax, not 0x20202020 ; convert to upper case
mov edi, commands ; list of commands to scan
.scanloop:
cmp eax, [edi]
je .got_it
add edi, 5*4
cmp byte [edi], 0
jne .scanloop
.error:
cmp [ebp + thread_data.state], STATE_ACTIVE
jb login_first
sendFTP "500 Unsupported command"
ret
.got_it:
mov eax, [ebp + thread_data.state]
jmp dword [edi + 4 + eax]
align 4
commands: ; all commands must be in uppercase
dd 'ABOR', login_first, login_first, login_first, cmdABOR
; dd 'ACCT', login_first, login_first, login_first, cmd_ACCT
; dd 'APPE', login_first, login_first, login_first, cmd_APPE
dd 'CDUP', login_first, login_first, login_first, cmdCDUP
dd 'CWD', login_first, login_first, login_first, cmdCWD
dd 'DELE', login_first, login_first, login_first, cmdDELE
; dd 'HELP', login_first, login_first, login_first, cmd_HELP
dd 'LIST', login_first, login_first, login_first, cmdLIST
; dd 'MDTM', login_first, login_first, login_first, cmd_MDTM
; dd 'MKD', login_first, login_first, login_first, cmd_MKD
; dd 'MODE', login_first, login_first, login_first, cmd_MODE
dd 'NLST', login_first, login_first, login_first, cmdNLST
dd 'NOOP', login_first, login_first, login_first, cmdNOOP
dd 'PASS', cmdPASS.0, cmdPASS , cmdPASS.2, cmdPASS.3
dd 'PASV', login_first, login_first, login_first, cmdPASV
dd 'PORT', login_first, login_first, login_first, cmdPORT
dd 'PWD', login_first, login_first, login_first, cmdPWD
dd 'QUIT', cmdQUIT, cmdQUIT, cmdQUIT, cmdQUIT
; dd 'REIN', login_first, login_first, login_first, cmd_REIN
; dd 'REST', login_first, login_first, login_first, cmd_REST
dd 'RETR', login_first, login_first, login_first, cmdRETR
; dd 'RMD', login_first, login_first, login_first, cmd_RMD
; dd 'RNFR', login_first, login_first, login_first, cmd_RNFR
; dd 'RNTO', login_first, login_first, login_first, cmd_RNTO
; dd 'SITE', login_first, login_first, login_first, cmd_SITE
; dd 'SIZE', login_first, login_first, login_first, cmd_SIZE
; dd 'STAT', login_first, login_first, login_first, cmd_STAT
dd 'STOR', login_first, login_first, login_first, cmdSTOR
; dd 'STOU', login_first, login_first, login_first, cmd_STOU
; dd 'STRU', login_first, login_first, login_first, cmd_STRU
dd 'SYST', login_first, login_first, login_first, cmdSYST
dd 'TYPE', login_first, login_first, login_first, cmdTYPE
dd 'USER', cmdUSER, cmdUSER, cmdUSER, cmdUSER.2
db 0 ; end marker
align 4
login_first:
sendFTP "530 Please login with USER and PASS"
ret
align 4
permission_denied:
sendFTP "550 Permission denied"
ret
align 4
socketerror:
invoke con_set_flags, 0x0c
invoke con_write_asciiz, str_sockerr
invoke con_set_flags, 0x07
sendFTP "425 Can't open data connection"
ret
align 4
abort_transfer:
and [ebp + thread_data.permissions], not ABORT
mov [ebp + thread_data.mode], MODE_NOTREADY
invoke file.close, ebx
mcall close, [ebp + thread_data.datasocketnum]
sendFTP "530 Transfer aborted"
ret
align 4
ip_to_dword: ; esi = ptr to str, cl = separator ('.', ',')
call ascii_to_byte
mov bl, al
cmp byte [esi], cl
jne .err
inc esi
call ascii_to_byte
mov bh, al
cmp byte [esi], cl
jne .err
inc esi
shl ebx, 16
call ascii_to_byte
mov bl, al
cmp byte [esi], cl
jne .err
inc esi
call ascii_to_byte
mov bh, al
ror ebx, 16
ret
.err:
xor ebx, ebx
ret
align 4 ; esi = ptr to str, output in eax
ascii_to_byte:
xor eax, eax
push ebx
.loop:
movzx ebx, byte[esi]
sub bl, '0'
jb .done
cmp bl, 9
ja .done
lea eax, [eax*4 + eax] ;
shl eax, 1 ; eax = eax * 10
add eax, ebx
inc esi
jmp .loop
.done:
pop ebx
ret
align 4
dword_to_ascii: ; edi = ptr where to write, eax is number
push edx ebx ecx
mov ebx, 10
xor ecx, ecx
@@:
xor edx, edx
div ebx
add edx, '0'
pushw dx
inc ecx
test eax, eax
jnz @r
@@:
popw ax
stosb
dec ecx
jnz @r
pop ecx ebx edx
ret
align 4
create_path: ; combine home_dir and work_dir strings into fpath
lea edi, [ebp + thread_data.fpath]
lea esi, [ebp + thread_data.home_dir]
mov ecx, 1024
.loop1:
lodsb
cmp al, 0x20
jb .next
stosb
loop .loop1
.next:
cmp byte[edi-1], '/'
jne @f
dec edi
@@:
lea esi, [ebp + thread_data.work_dir]
mov ecx, 1024
.loop2:
lodsb
cmp al, 0x20
jb .done
stosb
loop .loop2
.done:
xor al, al
stosb
ret
align 4
nextpasvport:
inc [pasv_port]
mov ax, [pasv_port]
cmp ax, [pasv_start]
jb .restart
cmp ax, [pasv_end]
ja .restart
ret
.restart:
pushw [pasv_start]
popw [pasv_port]
ret
;------------------------------------------------
; "ABOR"
;
; This command aborts the current filetransfer.
;
;------------------------------------------------
align 4
cmdABOR:
or [ebp + thread_data.permissions], ABORT
sendFTP "250 Command succesul"
ret
;------------------------------------------------
; "CDUP"
;
; Change the directory to move up one level.
;
;------------------------------------------------
align 4
cmdCDUP:
test [ebp + thread_data.permissions], PERMISSION_CD
jz permission_denied
cmp byte [ebp + thread_data.work_dir+1], 0 ; are we in "/" ?
je .done ; if so, we cant go up..
; find the end of asciiz string work_dir
mov ecx, 1024
xor al, al
lea edi, [ebp + thread_data.work_dir]
repne scasb
; return 2 characters (right before last /)
sub edi, 3
; and now search backwards, for a '/'
mov al,'/'
neg ecx
add ecx, 1024
std
repne scasb
cld
; terminate the string here
mov byte[edi+2], 0
.done:
; Print the new working dir on the console
lea eax, [ebp + thread_data.work_dir]
invoke con_write_asciiz, eax
invoke con_write_asciiz, str_newline
sendFTP "250 Command succesul"
ret
;------------------------------------------------
; "CWD"
;
; Change Working Directory.
;
;------------------------------------------------
align 4
cmdCWD:
test [ebp + thread_data.permissions], PERMISSION_CD
jz permission_denied
; do we have enough parameters?
sub ecx, 4
jbe .err
; get ready to copy the path
add esi, 4
mov ecx, 1024
lea edi, [ebp + thread_data.work_dir]
; if received dir starts with '/', we will simply copy it
; If not, we will append the current path with the received path.
cmp byte [esi], '/'
je .copyloop
; Find the end of work_dir string.
xor al, al
.find_zero:
repne scasb
dec edi
; and now append work_dir with received string
mov ecx, 1024
; scan for end byte, or '.'
.copyloop:
lodsb
cmp al, 0x20
jb .done
;;; cmp al, '.' ; '..' means we must go up one dir TODO
;;; je .up
stosb
loop .copyloop
; now, now make sure it ends with '/', 0
.done:
cmp byte [edi-1], '/'
je @f
mov byte [edi], '/'
inc edi
@@:
mov byte [edi], 0
; Print the new working dir on the console
lea eax, [ebp + thread_data.work_dir]
invoke con_write_asciiz, eax
invoke con_write_asciiz, str_newline
sendFTP "250 Command succesful"
ret
.err:
sendFTP "550 Directory does not exist"
ret
;------------------------------------------------
; "DELE"
;
; Delete a file from the server.
;
;------------------------------------------------
align 4
cmdDELE:
test [ebp + thread_data.permissions], PERMISSION_DELETE
jz permission_denied
ret
;------------------------------------------------
; "LIST"
;
; List the files in the current working directory.
;
;------------------------------------------------
align 4
cmdLIST:
test [ebp + thread_data.permissions], PERMISSION_EXEC
jz permission_denied
cmp [ebp + thread_data.mode], MODE_PASSIVE_OK
je .start
; If we are in active mode, it's time to open a data socket..
cmp [ebp + thread_data.mode], MODE_ACTIVE
jne .not_active
mov ecx, [ebp + thread_data.datasocketnum]
lea edx, [ebp + thread_data.datasock]
mov esi, sizeof.thread_data.datasock
mcall connect
cmp eax, -1
je socketerror
jmp .start
; If we are still in passive_wait, it's time we accept an incomming call..
.not_active:
cmp [ebp + thread_data.mode], MODE_PASSIVE_WAIT
jne socketerror
.try_now:
mov ecx, [ebp + thread_data.passivesocknum]
lea edx, [ebp + thread_data.datasock]
mov esi, sizeof.thread_data.datasock
mcall accept
cmp eax, -1
jne .pasv_ok
mov [ebp + thread_data.mode], MODE_PASSIVE_FAILED ; assume that we will fail
mcall 23, 200
mcall accept
cmp eax, -1
je socketerror
.pasv_ok:
mov [ebp + thread_data.datasocketnum], eax
mov [ebp + thread_data.mode], MODE_PASSIVE_OK
mcall close ; [ebp + thread_data.passivesocknum]
mov [ebp + thread_data.passivesocknum], -1
invoke con_write_asciiz, str_datasock
.start:
; Create fpath from home_dir and work_dir
call create_path
lea ebx, [ebp + thread_data.fpath]
invoke con_write_asciiz, ebx
invoke con_write_asciiz, str_newline
; Start the search
invoke file.find.first, ebx, str_mask, FA_READONLY+FA_FOLDER+FA_NORMAL+FA_ARCHIVED
test eax, eax
jz .nosuchdir
lea edi, [ebp + thread_data.buffer]
.parse_file:
test eax, eax ; did we find a file?
jz .done
mov ebx, eax ; yes, save the descripter in ebx
; first, convert the attributes
test [ebx + FileInfoA.Attributes], FA_FOLDER
jnz .folder
test [ebx + FileInfoA.Attributes], FA_READONLY
jnz .readonly
mov eax, '-rw-'
stosd
jmp .attr
.folder:
mov eax, 'drwx'
stosd
jmp .attr
.readonly:
mov eax, '-r--'
stosd
.attr:
mov eax, 'rw-r'
stosd
mov ax, 'w-'
stosw
mov al, ' '
stosb
; now..
mov ax, '1 '
stosw
; now write owner, everything is owned by FTP, woohoo!
mov eax, 'FTP '
stosd
stosd
; now the filesize in ascii
mov eax, [ebx + FileInfoA.FileSizeLow]
call dword_to_ascii
mov al, ' '
stosb
; then date (month/day/year)
movzx eax, [ebx + FileInfoA.DateModify + FileDateTime.month]
cmp eax, 12
ja @f
mov eax, [months - 4 + 4*eax]
stosd
@@:
movzx eax, [ebx + FileInfoA.DateModify + FileDateTime.day]
call dword_to_ascii
mov al, ' '
stosb
movzx eax, [ebx + FileInfoA.DateModify + FileDateTime.year]
call dword_to_ascii
mov al, ' '
stosb
; and last but not least, filename
lea esi, [ebx + FileInfoA.FileName]
mov ecx, 264
.nameloop:
lodsb
test al, al
jz .namedone
stosb
loop .nameloop
; insert a cr lf
.namedone:
mov ax, 0x0a0d
stosw
test [ebp + thread_data.permissions], ABORT ; Did we receive ABOR command from client?
;;; jnz .abort ; TODO
; check next file
invoke file.find.next, ebx
jmp .parse_file
; close file desc
.done:
invoke file.find.close, ebx ; ebx is descriptor of last file, eax will be -1 !!
; append the string with a 0
xor al, al
stosb
; Warn the client we're about to send the data
push edi
sendFTP "150 Here it comes.."
pop esi
; and send it to the client
mov ecx, [ebp + thread_data.datasocketnum] ; socket num
lea edx, [ebp + thread_data.buffer] ; buffer ptr
sub esi, edx ; length
xor edi, edi ; flags
mcall send
; close the data socket..
mov [ebp + thread_data.mode], MODE_NOTREADY
mcall close, [ebp + thread_data.datasocketnum]
sendFTP "226 Transfer OK"
ret
.nosuchdir:
sendFTP "550 Directory does not exist"
ret
;------------------------------------------------
; "NLST"
;
; List the filenames of the files in the current working directory.
;
;------------------------------------------------
align 4
cmdNLST:
test [ebp + thread_data.permissions], PERMISSION_EXEC
jz permission_denied
; TODO: same as list but simpler output format
ret
;------------------------------------------------
; "NOOP"
;
; No operation, just keep the connection alive.
;
;------------------------------------------------
align 4
cmdNOOP:
sendFTP "200 Command OK"
ret
;------------------------------------------------
; "PASS"
;
; Second phase of login process, client provides password.
;
;------------------------------------------------
align 4
cmdPASS:
; read the password from users.ini
lea edi, [ebp + thread_data.buffer + 512] ; temp pass
lea ebx, [ebp + thread_data.fpath] ; temp username
invoke ini.get_str, path2, ebx, str_pass, edi, 512, str_infinity
test eax, eax ; unable to read password? fail!
jnz .incorrect
cmp dword [edi], -1 ; no key, section or file found.. fail!
je .incorrect
;;; cmp byte [edi], 0 ; zero password? ok!
;;; je .ok
add esi, 5
sub ecx, 5
jbe .incorrect ; no password given? but hey, we need one! fail..
; compare with received password
repe cmpsb
cmp byte [esi-1], 0x20 ; printeable characters left?
jae .incorrect
cmp byte [edi-1], 0
jne .incorrect
.ok:
invoke ini.get_int, path2, ebx, str_mode, 0
mov [ebp + thread_data.permissions], eax
invoke con_write_asciiz, str_pass_ok
mov [ebp + thread_data.state], STATE_ACTIVE
sendFTP "230 You are now logged in"
ret
.2:
.incorrect:
invoke con_write_asciiz, str_pass_err
mov [ebp + thread_data.state], STATE_CONNECTED ; reset state
sendFTP "530 Login incorrect"
ret
.0:
sendFTP "503 Login with USER first"
ret
.3:
sendFTP "230 Already logged in"
ret
;------------------------------------------------
; "PASV"
;
; Initiate a passive dataconnection.
;
;------------------------------------------------
align 4
cmdPASV:
cmp [ebp + thread_data.passivesocknum], -1
je @f
mcall close, [ebp + thread_data.passivesocknum] ; if there is still a socket open, close it
@@:
; Open a new TCP socket
mcall socket, AF_INET4, SOCK_STREAM, 0
cmp eax, -1
je socketerror
mov [ebp + thread_data.passivesocknum], eax
; Bind it to a known local port
mov [ebp + thread_data.datasock.sin_family], AF_INET4
mov [ebp + thread_data.datasock.sin_addr], 0
mov ecx, eax ; passivesocketnum
lea edx, [ebp + thread_data.datasock]
mov esi, sizeof.thread_data.datasock
.next_port: ; TODO: break the endless loop
call nextpasvport
pushw [pasv_port]
popw [ebp + thread_data.datasock.sin_port]
mcall bind
cmp eax, -1
je .next_port
; And set it to listen!
mcall listen, , 1
cmp eax, -1
je socketerror
; Tell our thread we are ready to accept incoming calls
mov [ebp + thread_data.mode], MODE_PASSIVE_WAIT
; Now tell the client where to connect to in this format:
; 227 Entering Passive Mode (a1,a2,a3,a4,p1,p2)
; where a1.a2.a3.a4 is the IP address and p1*256+p2 is the port number.
; '227 ('
lea edi, [ebp + thread_data.buffer]
mov eax, '227 '
stosd
mov al, '('
stosb
; ip
movzx eax, byte [serverip]
call dword_to_ascii
mov al, ','
stosb
movzx eax, byte [serverip+1]
call dword_to_ascii
mov al, ','
stosb
movzx eax, byte [serverip+2]
call dword_to_ascii
mov al, ','
stosb
movzx eax, byte [serverip+3]
call dword_to_ascii
mov al, ','
stosb
; port
movzx eax, byte [ebp + thread_data.datasock.sin_port + 1]
call dword_to_ascii
mov al, ','
stosb
movzx eax, byte [ebp + thread_data.datasock.sin_port]
call dword_to_ascii
; ')', 13, 10, 0
mov eax, ')' + 0x000a0d00
stosd
lea esi, [edi - thread_data.buffer]
sub esi, ebp
mov ecx, [ebp + thread_data.socketnum]
lea edx, [ebp + thread_data.buffer]
xor edi, edi
mcall send
ret
;------------------------------------------------
; "PWD"
;
; Print the current working directory.
;
;------------------------------------------------
align 4
cmdPWD:
mov dword [ebp + thread_data.buffer], '257 '
mov byte [ebp + thread_data.buffer+4], '"'
lea edi, [ebp + thread_data.buffer+5]
lea esi, [ebp + thread_data.work_dir]
mov ecx, 1024
.loop:
lodsb
or al, al
jz .ok
stosb
dec ecx
jnz .loop
.ok:
mov dword [edi], '"' + 0x000a0d00 ; '"',13,10,0
lea esi, [edi - thread_data.buffer + 4]
sub esi, ebp
mov ecx, [ebp + thread_data.socketnum]
lea edx, [ebp + thread_data.buffer]
xor edi, edi
mcall send
; Print the new working dir on the console
lea eax, [ebp + thread_data.work_dir]
invoke con_write_asciiz, eax
invoke con_write_asciiz, str_newline
ret
;------------------------------------------------
; "PORT"
;
; Initiate an active dataconnection.
;
;------------------------------------------------
align 4
cmdPORT:
; PORT a1,a2,a3,a4,p1,p2
; IP address a1.a2.a3.a4, port p1*256+p2
; Convert the IP
lea esi, [esi+5]
mov cl, ','
call ip_to_dword
; And put it in datasock
mov [ebp + thread_data.datasock.sin_addr], ebx
; Now the same with portnumber
inc esi
call ascii_to_byte
mov bh, al
inc esi
call ascii_to_byte
mov bl, al
; Save it in datasock too
mov [ebp + thread_data.datasock.sin_port], bx
; We will open the socket, but do not connect yet!
mov [ebp + thread_data.datasock.sin_family], AF_INET4
mcall socket, AF_INET4, SOCK_STREAM, 0
cmp eax, -1
je socketerror
mov [ebp + thread_data.datasocketnum], eax
mov [ebp + thread_data.mode], MODE_ACTIVE
sendFTP "225 Data connection open"
ret
;------------------------------------------------
; "QUIT"
;
; Close the connection with client.
;
;------------------------------------------------
align 4
cmdQUIT:
sendFTP "221 Bye!"
mcall close, [ebp + thread_data.datasocketnum]
mcall close, [ebp + thread_data.socketnum]
add esp, 4 ; get rid of call return address
jmp thread_exit ; now close this thread
;------------------------------------------------
; "RETR"
;
; Retrieve a file from the ftp server.
;
;------------------------------------------------
align 4
cmdRETR:
test [ebp + thread_data.permissions], PERMISSION_READ
jz permission_denied
cmp ecx, 1024 + 5
jae .cannot_open
sub ecx, 5
jb .cannot_open
cmp [ebp + thread_data.mode], MODE_PASSIVE_OK
je .start
; If we are in active mode, it's time to open a data socket..
cmp [ebp + thread_data.mode], MODE_ACTIVE
jne .not_active
mov ecx, [ebp + thread_data.datasocketnum]
lea edx, [ebp + thread_data.datasock]
mov esi, sizeof.thread_data.datasock
mcall connect
cmp eax, -1
je socketerror
jmp .start
; If we are still in passive_wait, it's time we accept an incomming call..
.not_active:
cmp [ebp + thread_data.mode], MODE_PASSIVE_WAIT
jne socketerror
mov [ebp + thread_data.mode], MODE_PASSIVE_FAILED ; assume that we will fail
.try_now:
mov ecx, [ebp + thread_data.passivesocknum]
lea edx, [ebp + thread_data.datasock]
mov esi, sizeof.thread_data.datasock
mcall accept
cmp eax, -1
jne .pasv_ok
mcall 23, 200
mcall accept
cmp eax, -1
je socketerror
.pasv_ok:
mov [ebp + thread_data.datasocketnum], eax
mov [ebp + thread_data.mode], MODE_PASSIVE_OK
mcall close ; [ebp + thread_data.passivesocknum]
mov [ebp + thread_data.passivesocknum], -1
invoke con_write_asciiz, str_datasock
.start:
call create_path
dec edi
add esi, 5
lea esi, [ebp + thread_data.buffer] ; FIXME
mov ecx, 1024
.loop:
lodsb
cmp al, 0x20
jl .done
stosb
loop .loop
.done:
xor al, al
stosb
lea ebx, [ebp + thread_data.fpath]
invoke con_write_asciiz, ebx
invoke con_write_asciiz, str_newline
invoke file.open, ebx, O_READ
test eax, eax
jz .cannot_open
push eax
sendFTP "150 Here it comes.."
pop ebx
.read_more:
test [ebp + thread_data.permissions], ABORT
jnz abort_transfer
lea eax, [ebp + thread_data.buffer] ; FIXME: use another buffer!! if we receive something on control connection now, we screw up!
invoke file.read, ebx, eax, BUFFERSIZE
cmp eax, -1
je .cannot_open ; FIXME: this is not the correct error
push eax ebx
mov esi, eax
mov ecx, [ebp + thread_data.datasocketnum]
lea edx, [ebp + thread_data.buffer]
xor edi, edi
mcall send
pop ebx ecx
cmp eax, -1
je socketerror ; FIXME: not the correct error
; cmp eax, ecx
; jne not_all_byes_sent ; TODO
cmp ecx, BUFFERSIZE
je .read_more
invoke file.close, ebx
mov [ebp + thread_data.mode], MODE_NOTREADY
mcall close, [ebp + thread_data.datasocketnum]
sendFTP "226 Transfer OK, closing connection"
ret
.cannot_open:
invoke con_set_flags, 0x0c
invoke con_write_asciiz, str_notfound
invoke con_set_flags, 0x07
sendFTP "550 No such file"
ret
;------------------------------------------------
; "STOR"
;
; Store a file on the server.
;
;------------------------------------------------
align 4
cmdSTOR:
test [ebp + thread_data.permissions], PERMISSION_WRITE
jz permission_denied
;;;;
test [ebp + thread_data.permissions], ABORT
jnz abort_transfer
;;;;
ret
;------------------------------------------------
; "SYST"
;
; Send information about the system.
;
;------------------------------------------------
align 4
cmdSYST:
sendFTP "215 UNIX type: L8"
ret
;------------------------------------------------
; "TYPE"
;
; Choose the file transfer type.
;
;------------------------------------------------
align 4
cmdTYPE:
cmp ecx, 6
jb parse_cmd.error
mov al, byte[esi+5]
and al, not 0x20
cmp al, 'A'
je .ascii
cmp al, 'E'
je .ebdic
cmp al, 'I'
je .image
cmp al, 'L'
je .local
jmp parse_cmd.error
.ascii:
mov [ebp + thread_data.type], TYPE_ASCII
jmp .subtype
.ebdic:
mov [ebp + thread_data.type], TYPE_EBDIC
.subtype:
cmp ecx, 8
jb .non_print
mov al, byte[esi+7]
and al, not 0x20
cmp al, 'N'
je .non_print
cmp al, 'T'
je .telnet
cmp al, 'C'
je .asacc
jmp parse_cmd.error
.non_print:
or [ebp + thread_data.type], TYPE_NP
jmp .ok
.telnet:
or [ebp + thread_data.type], TYPE_TELNET
jmp .ok
.asacc:
or [ebp + thread_data.type], TYPE_ASA
jmp .ok
.image:
mov [ebp + thread_data.type], TYPE_IMAGE
jmp .ok
.local:
cmp ecx, 8
jb parse_cmd.error
mov al, byte[esi+7]
sub al, '0'
jb parse_cmd.error ; FIXME: this is not the correct errormessage
cmp al, 9
ja parse_cmd.error ; FIXME
or al, TYPE_LOCAL
mov [ebp + thread_data.type], al
.ok:
sendFTP "200 Command ok"
ret
;------------------------------------------------
; "USER"
;
; Login to the server, step one of two. ;;; TODO: prevent buffer overflow!
;
;------------------------------------------------
align 4
cmdUSER:
lea esi, [esi + 5]
lea edi, [ebp + thread_data.fpath] ; temp buffer for username
.loop:
lodsb
stosb
cmp al, 0x20
jae .loop
mov byte [edi-1], 0
lea esi, [ebp + thread_data.fpath]
lea eax, [ebp + thread_data.home_dir]
invoke ini.get_str, path2, esi, str_home, eax, 1024, str_infinity
cmp eax, -1
je .login_fail
cmp dword [esi], -1
je .login_fail
mov word [ebp + thread_data.work_dir], "/" ; "/", 0
invoke con_write_asciiz, str_logged_in
mov [ebp + thread_data.state], STATE_LOGIN
.sendstr:
sendFTP "331 Please specify the password"
ret
.login_fail:
invoke con_write_asciiz, str_pass_err
mov [ebp + thread_data.state], STATE_LOGIN_FAIL
jmp .sendstr
align 4
.2:
sendFTP "530 Can't change to another user"
ret