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kolibrios/programs/network/ftpc/servercommands.inc

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server_parser:
; Commands are always 3 numbers and followed by a space
; If a server decides it needs multiline output,
; first lines will have a dash instead of space after numbers,
; thus they are simply ignored in this simple command parser.
cmp dword[s], "150 "
je data_ok
cmp dword[s], "220 "
je welcome
; cmp dword[s], "226 "
; je list_ok
cmp dword[s], "227 "
je pasv_ok
cmp dword[s], "230 "
je login_ok
; cmp dword[s], "250"
; je dir_ok
cmp dword[s], "331 "
je pass
; cmp dword[s], "421 "
; je timeout
cmp dword[s], "530" ; password incorrect
je welcome
jmp wait_for_usercommand
welcome:
mov [status], STATUS_CONNECTED
jmp wait_for_usercommand
pass:
mov [status], STATUS_NEEDPASSWORD
jmp wait_for_usercommand
login_ok:
mov [status], STATUS_LOGGED_IN
jmp wait_for_usercommand
pasv_ok:
sub ecx, 5
jb .fail
mov al, "("
mov edi, s + 5
repne scasb
mcall socket, AF_INET4, SOCK_STREAM, 0
cmp eax, -1
je fail
mov [datasocket], eax
mov esi, edi
call ascii_dec
mov byte[sockaddr2.ip+0], bl
call ascii_dec
mov byte[sockaddr2.ip+1], bl
call ascii_dec
mov byte[sockaddr2.ip+2], bl
call ascii_dec
mov byte[sockaddr2.ip+3], bl
call ascii_dec
mov byte[sockaddr2.port+0], bl
call ascii_dec
mov byte[sockaddr2.port+1], bl
invoke con_write_asciiz, str_open
mcall connect, [datasocket], sockaddr2, 18
.fail:
jmp wait_for_servercommand
data_ok:
mcall recv, [datasocket], buffer_ptr2, BUFFERSIZE, 0
test ebx, ebx
jnz .fail
mov byte[buffer_ptr2 + eax], 0
invoke con_write_asciiz, buffer_ptr2
jmp data_ok
.fail:
mcall close, [datasocket]
jmp wait_for_servercommand
ascii_dec:
xor ebx, ebx
mov cl, 4 ; max length is 3 digits + 1 separator
.loop:
lodsb
sub al, '0'
jb .done
cmp al, 9
ja .done
lea ebx, [ebx*4+ebx] ; ebx *5
shl ebx, 1 ; ebx *2
add bl, al
dec cl
jnz .loop
.done:
ret