forked from KolibriOS/kolibrios
151 lines
4.3 KiB
NASM
151 lines
4.3 KiB
NASM
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2010-2013. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;; nslookup.asm - name service lookup (DNS)) program for KolibriOS ;;
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;; ;;
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;; Written by hidnplayr@kolibrios.org ;;
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;; ;;
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;; GNU GENERAL PUBLIC LICENSE ;;
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;; Version 2, June 1991 ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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format binary as ""
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use32
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; standard header
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db 'MENUET01' ; signature
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dd 1 ; header version
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dd start ; entry point
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dd i_end ; initialized size
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dd mem ; required memory
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dd mem ; stack pointer
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dd 0 ; parameters
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dd 0 ; path
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; useful includes
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include '../../macros.inc'
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purge mov,add,sub
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include '../../proc32.inc'
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include '../../dll.inc'
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include '../../network.inc'
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; entry point
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start:
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; load libraries
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stdcall dll.Load, @IMPORT
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test eax, eax
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jnz exit
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; initialize console
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push 1
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call [con_start]
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push title
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push -1
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push -1
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push -1
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push -1
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call [con_init]
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; main loop
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main:
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; write prompt
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push str1
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call [con_write_asciiz]
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; read string
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mov esi, s
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push 256
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push esi
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call [con_gets]
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; check for exit
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test eax, eax
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jz done
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cmp byte [esi], 10
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jz done
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; delete terminating '\n'
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push esi
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@@:
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lodsb
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test al, al
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jnz @b
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mov byte [esi-2], al
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pop esi
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; resolve name
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push esp ; reserve stack place
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push esp ; fourth parameter
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push 0 ; third parameter
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push 0 ; second parameter
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push esi ; first parameter
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call [getaddrinfo]
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pop esi
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; test for error
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test eax, eax
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jnz fail
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; write results
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push str2
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call [con_write_asciiz]
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mov edi, esi
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addrloop:
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; before all subsequent addresses print comma
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cmp edi, esi
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jz @f
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push str3
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call [con_write_asciiz]
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@@:
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; convert IP address to decimal notation
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mov eax, [edi+addrinfo.ai_addr]
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pushd [eax+sockaddr_in.sin_addr]
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call [inet_ntoa]
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; write result
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push eax
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call [con_write_asciiz]
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; advance to next item
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mov edi, [edi+addrinfo.ai_next]
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test edi, edi
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jnz addrloop
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; free allocated memory
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push esi
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call [freeaddrinfo]
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; write newline and continue main loop
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push str4
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@@:
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call [con_write_asciiz]
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jmp main
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fail:
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push str5
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jmp @b
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done:
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push 1
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call [con_exit]
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exit:
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mcall -1
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; data
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title db 'Names resolver',0
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str1 db 'Host name to resolve: ',0
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str2 db 'IP address(es): ',0
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str3 db ', ',0
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str4 db 10,0
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str5 db 'Name resolution failed.',10,0
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; import
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align 4
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@IMPORT:
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library network, 'network.obj', console, 'console.obj'
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import network, \
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getaddrinfo, 'getaddrinfo', \
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freeaddrinfo, 'freeaddrinfo', \
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inet_ntoa, 'inet_ntoa'
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import console, \
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con_start, 'START', \
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con_init, 'con_init', \
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con_write_asciiz, 'con_write_asciiz', \
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con_exit, 'con_exit', \
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con_gets, 'con_gets'
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i_end:
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s rb 256
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align 4
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rb 4096 ; stack
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mem:
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