;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2010-2013. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; telnet.asm - Telnet client for KolibriOS ;;
;; ;;
;; Written by hidnplayr@kolibrios.org ;;
;; ;;
;; GNU GENERAL PUBLIC LICENSE ;;
;; Version 2, June 1991 ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
format binary as ""
__DEBUG__ = 0
__DEBUG_LEVEL__ = 1
BUFFERSIZE = 4096
use32
; standard header
db 'MENUET01' ; signature
dd 1 ; header version
dd start ; entry point
dd i_end ; initialized size
dd mem+4096 ; required memory
dd mem+4096 ; stack pointer
dd hostname ; parameters
dd 0 ; path
include '../../macros.inc'
purge mov,add,sub
include '../../proc32.inc'
include '../../dll.inc'
include '../../debug-fdo.inc'
include '../../network.inc'
; entry point
start:
; load libraries
stdcall dll.Load, @IMPORT
test eax, eax
jnz exit
; initialize console
push 1
call [con_start]
push title
push 25
push 80
push 25
push 80
call [con_init]
; Check for parameters
cmp byte [hostname], 0
jne resolve
main:
call [con_cls]
; Welcome user
push str1
call [con_write_asciiz]
prompt:
; write prompt
push str2
call [con_write_asciiz]
; read string
mov esi, hostname
push 256
push esi
call [con_gets]
; check for exit
test eax, eax
jz done
cmp byte [esi], 10
jz done
resolve:
mov [sockaddr1.port], 23 shl 8
; delete terminating '\n'
mov esi, hostname
@@:
lodsb
cmp al, ':'
je .do_port
cmp al, 0x20
ja @r
mov byte [esi-1], 0
jmp .done
.do_port:
xor eax, eax
xor ebx, ebx
mov byte [esi-1], 0
.portloop:
lodsb
cmp al, 0x20
jbe .port_done
sub al, '0'
jb hostname_error
cmp al, 9
ja hostname_error
lea ebx, [ebx*4 + ebx]
shl ebx, 1
add ebx, eax
jmp .portloop
.port_done:
xchg bl, bh
mov [sockaddr1.port], bx
.done:
; resolve name
push esp ; reserve stack place
push esp ; ptr to result
push 0 ; addrinfo hints
push 0 ; servname
push hostname; hostname
call [getaddrinfo]
pop esi
; test for error
test eax, eax
jnz dns_error
call [con_cls]
push str3
call [con_write_asciiz]
push hostname
call [con_write_asciiz]
; write results
push str8
call [con_write_asciiz]
; mov edi, esi
; convert IP address to decimal notation
mov eax, [esi+addrinfo.ai_addr]
mov eax, [eax+sockaddr_in.sin_addr]
mov [sockaddr1.ip], eax
push eax
call [inet_ntoa]
; write result
push eax
call [con_write_asciiz]
; free allocated memory
push esi
call [freeaddrinfo]
push str9
call [con_write_asciiz]
mcall socket, AF_INET4, SOCK_STREAM, 0
cmp eax, -1
jz socket_err
mov [socketnum], eax
mcall connect, [socketnum], sockaddr1, 18
mcall 40, 1 shl 7 ; + 7
call [con_cls]
mcall 18, 7
push eax
mcall 51, 1, thread, mem - 2048
pop ecx
mcall 18, 3
mainloop:
DEBUGF 1, 'TELNET: Waiting for events\n'
mcall 10
DEBUGF 1, 'TELNET: EVENT %x !\n', eax
call [con_get_flags]
test eax, 0x200 ; con window closed?
jnz exit
.check_for_data:
mcall recv, [socketnum], buffer_ptr, BUFFERSIZE, 0
cmp eax, -1
jne .parse_data
cmp ebx, 6 ; EWOULDBLOCK
je mainloop
jmp closed
.parse_data:
DEBUGF 1, 'TELNET: got %u bytes of data !\n', eax
mov esi, buffer_ptr
lea edi, [esi + eax]
mov byte [edi], 0
.scan_cmd:
cmp byte [esi], 0xff ; Interpret As Command
jne .no_cmd
; TODO: parse options, for now, we will reply with 'WONT' to everything
mov byte [esi + 1], 252 ; WONT
add esi, 3 ; a command is always 3 bytes
jmp .scan_cmd
.no_cmd:
cmp esi, buffer_ptr
je .print
DEBUGF 1, 'TELNET: sending data\n'
push esi edi
sub esi, buffer_ptr
mcall send, [socketnum], buffer_ptr, , 0
pop edi esi
.print:
cmp esi, edi
jae .check_for_data
push esi
call [con_write_asciiz]
.loop:
lodsb
test al, al
jz .print
jmp .loop
socket_err:
DEBUGF 1, "TELNET: socket error %d", ebx
push str6
call [con_write_asciiz]
jmp prompt
dns_error:
DEBUGF 1, "TELNET: DNS error %d", eax
push str5
call [con_write_asciiz]
jmp prompt
hostname_error:
push str11
call [con_write_asciiz]
jmp prompt
closed:
push str12
call [con_write_asciiz]
jmp prompt
done:
push 1
call [con_exit]
exit:
mcall close, [socketnum]
mcall -1
thread:
mcall 40, 0
.loop:
call [con_getch2]
mov byte [send_data], al
mcall send, [socketnum], send_data, 1
call [con_get_flags]
test eax, 0x200 ; con window closed?
jz .loop
mcall -1
; data
title db 'Telnet',0
str1 db 'Telnet for KolibriOS',10,10,\
'Please enter URL of telnet server (for example: towel.blinkenlights.nl:23)',10,10,0
str2 db '> ',0
str3 db 'Connecting to ',0
str4 db 10,0
str8 db ' (',0
str9 db ')',10,0
str5 db 'Name resolution failed.',10,10,0
str6 db 'Could not open socket.',10,10,0
str11 db 'Invalid hostname.',10,10,0
str12 db 10,'Remote host closed the connection.',10,10,0
sockaddr1:
dw AF_INET4
.port dw 0
.ip dd 0
rb 10
include_debug_strings ; ALWAYS present in data section
; import
align 4
@IMPORT:
library network, 'network.obj', console, 'console.obj'
import network, \
getaddrinfo, 'getaddrinfo', \
freeaddrinfo, 'freeaddrinfo', \
inet_ntoa, 'inet_ntoa'
import console, \
con_start, 'START', \
con_init, 'con_init', \
con_write_asciiz, 'con_write_asciiz', \
con_exit, 'con_exit', \
con_gets, 'con_gets',\
con_cls, 'con_cls',\
con_getch2, 'con_getch2',\
con_set_cursor_pos, 'con_set_cursor_pos',\
con_write_string, 'con_write_string',\
con_get_flags, 'con_get_flags'
i_end:
socketnum dd ?
buffer_ptr rb BUFFERSIZE+1
send_data rb 1
hostname rb 1024
mem: