forked from KolibriOS/kolibrios
730 lines
21 KiB
NASM
730 lines
21 KiB
NASM
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2010-2015. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;; zeroconfig.asm - Zeroconfig service for KolibriOS ;;
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;; ;;
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;; Written by hidnplayr@kolibrios.org ;;
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;; Some code contributed by Derpenguin ;;
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;; ;;
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;; DHCP code is based on that by Mike Hibbet ;;
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;; (DHCP client for menuetos) ;;
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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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; CONFIGURATION
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TIMEOUT = 3 ; in seconds
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BUFFER = 1024 ; in bytes
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DHCP_TRIES = 3 ; number of times to try contacting DHCP server
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__DEBUG__ = 1 ; enable/disable
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__DEBUG_LEVEL__ = 2 ; 1 = all, 2 = errors
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; CONFIGURATION FOR LINK-LOCAL
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PROBE_WAIT = 1 ; second (initial random delay)
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PROBE_MIN = 1 ; second (minimum delay till repeated probe)
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PROBE_MAX = 2 ; seconds (maximum delay till repeated probe)
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PROBE_NUM = 3 ; (number of probe packets)
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ANNOUNCE_NUM = 2 ; (number of announcement packets)
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ANNOUNCE_INTERVAL = 2 ; seconds (time between announcement packets)
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ANNOUNCE_WAIT = 2 ; seconds (delay before announcing)
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MAX_CONFLICTS = 10 ; (max conflicts before rate limiting)
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RATE_LIMIT_INTERVAL = 60 ; seconds (delay between successive attempts)
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DEFEND_INTERVAL = 10 ; seconds (min. wait between defensive ARPs)
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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 0x01 ; header version
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dd START ; start of code
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dd IM_END ; size of image
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dd (I_END+0x100) ; memory for app
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dd (I_END+0x100) ; esp
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dd 0, 0 ; I_Param, I_Path
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include '../../proc32.inc'
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include '../../macros.inc'
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include '../../debug-fdo.inc'
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include '../../network.inc'
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include 'dhcp.inc'
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include '../../dll.inc'
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START:
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mcall 68, 11
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stdcall dll.Load,@IMPORT
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or eax, eax
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jnz fail
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DEBUGF 2,"Zero-config service loaded\n"
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mcall 40, EVM_STACK2
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wait_for_link_up:
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mov bh, [device]
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mov bl, 0 ; Get device type
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mcall 74
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cmp eax, 1 ; Ethernet
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jne .wait
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mov bl, 10 ; Get Link status
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mcall 74
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test eax, eax
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jnz .go
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.wait:
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mcall 10
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jmp wait_for_link_up
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.go:
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mov ebx, API_ETH + 0
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mov bh, [device]
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mcall 76 ; get MAC of the ethernet interface
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mov word[MAC], bx
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mov dword[MAC+2], eax
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DEBUGF 1,"MAC: %x-%x-%x-%x-%x-%x\n", [MAC+0]:2, [MAC+1]:2, [MAC+2]:2, [MAC+3]:2, [MAC+4]:2, [MAC+5]:2
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invoke ini.get_str, path, str_ipconfig, str_type, inibuf, 16, 0
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cmp dword[inibuf], 'stat'
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je static
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jmp try_dhcp
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wait_for_link_down:
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; TODO: detect ARP conflicts
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mcall 40, EVM_STACK2
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.loop:
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mcall 10
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mov bh, [device]
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mov bl, 0 ; Get device type
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mcall 74
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cmp eax, 0 ; No device
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je .down
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mov bl, 10 ; Get Link status
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mcall 74
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test eax, eax
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jnz .loop
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.down:
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xor ecx, ecx
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mov ebx, API_IPv4 + 3
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mov bh, [device]
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mcall 76 ; ip
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mov bl, 5
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mcall 76 ; dns
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mov bl, 7
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mcall 76 ; subnet
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mov bl, 9
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mcall 76 ; gateway
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jmp wait_for_link_up
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static:
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DEBUGF 1,"Applying Static IP settings\n"
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invoke ini.get_str, path, str_ipconfig, str_ip, inibuf, 16, 0
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mov edx, inibuf
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call ip_str_to_dword
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mov ecx, edx
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mov ebx, API_IPv4 + 3 ; set IP
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mov bh, [device]
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mcall 76
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invoke ini.get_str, path, str_ipconfig, str_gateway, inibuf, 16, 0
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mov edx, inibuf
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call ip_str_to_dword
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mov ecx, edx
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mov ebx, API_IPv4 + 9 ; set gateway
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mov bh, [device]
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mcall 76
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invoke ini.get_str, path, str_ipconfig, str_dns, inibuf, 16, 0
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mov edx, inibuf
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call ip_str_to_dword
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mov ecx, edx
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mov ebx, API_IPv4 + 5 ; set DNS
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mov bh, [device]
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mcall 76
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invoke ini.get_str, path, str_ipconfig, str_subnet, inibuf, 16, 0
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mov edx, inibuf
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call ip_str_to_dword
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mov ecx, edx
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mov ebx, API_IPv4 + 7 ; set subnet
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mov bh, [device]
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mcall 76
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mov [notify_struct.msg], str_connected
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mcall 70, notify_struct
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jmp wait_for_link_down
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try_dhcp:
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DEBUGF 2,"Trying to contact DHCP server\n"
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mcall 40, EVM_STACK
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mcall 75, 0, AF_INET4, SOCK_DGRAM, 0 ; open socket (parameters: domain, type, reserved)
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cmp eax, -1
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je socket_error
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mov [socketNum], eax
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DEBUGF 1,"Socket %x opened\n", eax
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mcall 75, 2, [socketNum], sockaddr1, 18 ; bind socket to local port 68
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cmp eax, -1
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je socket_error
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DEBUGF 1,"Socket Bound to local port 68\n"
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mcall 75, 4, [socketNum], sockaddr2, 18 ; connect to 255.255.255.255 on port 67
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cmp eax, -1
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je socket_error
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DEBUGF 1,"Connected to 255.255.255.255 on port 67\n"
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mov [dhcpMsgType_tx], 0x01 ; DHCP discover
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mov [dhcpLease], esi ; esi is still -1 (-1 = forever)
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call random
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mov [dhcpXID], eax
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build_request: ; Creates a DHCP request packet.
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DEBUGF 1,"Building request\n"
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mcall 26, 9 ; Get system time
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imul eax, 100
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mov [currTime], eax
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mov [tries], DHCP_TRIES
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stdcall mem.Alloc, BUFFER
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test eax, eax
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jz dhcp_fail2
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mov [dhcpMsg], eax
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; Fill buffer with zeros
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mov edi, eax
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mov ecx, BUFFER
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xor eax, eax
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rep stosb
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mov edx, [dhcpMsg]
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; Boot protocol legacy
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mov [edx], byte 0x01 ; Boot request
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mov [edx+1], byte 0x01 ; Ethernet
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mov [edx+2], byte 0x06 ; Ethernet h/w len
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mov eax, [dhcpXID]
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mov [edx+4], eax ; xid
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mov eax, [currTime]
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mov [edx+8], eax ; secs, our uptime
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mov [edx+10], byte 0x80 ; broadcast flag set
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mov eax, dword [MAC] ; first 4 bytes of MAC
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mov [edx+28],dword eax
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mov ax, word [MAC+4] ; last 2 bytes of MAC
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mov [edx+32],word ax
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; DHCP extension
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mov [edx+236], dword 0x63538263 ; magic cookie
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mov [edx+240], word 0x0135 ; option DHCP msg type
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mov al, [dhcpMsgType_tx]
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mov [edx+240+2], al
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mov [edx+240+3], word 0x0433 ; option Lease time = infinity
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mov eax, [dhcpLease]
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mov [edx+240+5], eax
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mov [edx+240+9], word 0x0432 ; option requested IP address
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mov eax, [dhcp.ip]
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mov [edx+240+11], eax
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mov [edx+240+15], word 0x0437 ; option request list
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mov [edx+240+17], dword 0x0f060301
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cmp [dhcpMsgType_tx], 0x01 ; Check which msg we are sending
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jne .options
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mov [edx+240+21], byte 0xff ; end of options marker
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mov [dhcpMsgLen], 262 ; length
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jmp send_dhcpmsg
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.options:
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mov [edx+240+21], word 0x0436 ; server IP
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mov eax, [dhcpServerIP]
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mov [edx+240+23], eax
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mov [edx+240+27], byte 0xff ; end of options marker
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mov [dhcpMsgLen], 268 ; length
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send_dhcpmsg:
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DEBUGF 1,"Sending DHCP discover/request\n"
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mcall 75, 6, [socketNum], [dhcpMsg], [dhcpMsgLen] ; write to socket (send broadcast request)
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; Wait for data
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mcall 26, 9
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add eax, TIMEOUT*100
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mov [timeout], eax
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.wait:
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mcall 23, TIMEOUT
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read_data: ; we have data - this will be the response
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mcall 75, 7, [socketNum], [dhcpMsg], BUFFER, MSG_DONTWAIT ; read data from socket
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cmp eax, -1
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jne .got_data
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mcall 26, 9
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cmp eax, [timeout]
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jb send_dhcpmsg.wait
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DEBUGF 2,"No answer from DHCP server\n"
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dec [tries]
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jnz send_dhcpmsg ; try again
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stdcall mem.Free, [dhcpMsg]
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jmp dhcp_fail
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.got_data:
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DEBUGF 1,"%d bytes received\n", eax
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mov [dhcpMsgLen], eax
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; depending on which msg we sent, handle the response
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; accordingly.
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; If the response is to a dhcp discover, then:
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; 1) If response is DHCP OFFER then
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; 1.1) record server IP, lease time & IP address.
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; 1.2) send a request packet
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; If the response is to a dhcp request, then:
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; 1) If the response is DHCP ACK then
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; 1.1) extract the DNS & subnet fields. Set them in the stack
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cmp [dhcpMsgType_tx], 0x01 ; did we send a discover?
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je discover_sent
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cmp [dhcpMsgType_tx], 0x03 ; did we send a request?
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je request_sent
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; we should never reach here ;)
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stdcall mem.Free, [dhcpMsg]
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jmp fail
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discover_sent:
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call parse_response
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cmp [dhcpMsgType_rx], 0x02 ; Was the response an offer?
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jne read_data
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DEBUGF 1, "Got offer, making request\n"
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mov [dhcpMsgType_tx], 0x03 ; make it a request
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jmp build_request
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request_sent:
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call parse_response
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cmp [dhcpMsgType_rx], 0x05 ; Was the response an ACK? It should be
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jne read_data ; NO - read next packets
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DEBUGF 2, "IP assigned by DHCP server successfully\n"
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mov [notify_struct.msg], str_connected
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mcall 70, notify_struct
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mcall close, [socketNum]
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mov ebx, API_IPv4 + 3
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mov bh, [device]
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mcall 76, , [dhcp.ip] ; ip
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mov bl, 5
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mcall 76, , [dhcp.dns] ; dns
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mov bl, 7
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mcall 76, , [dhcp.subnet] ; subnet
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mov bl, 9
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mcall 76, , [dhcp.gateway] ; gateway
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jmp wait_for_link_down
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;***************************************************************************
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; Function
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; parseResponse
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;
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; Description
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; extracts the fields ( client IP address and options ) from
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; a DHCP response
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; The values go into
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; dhcpMsgType,dhcpLease,dhcpClientIP,dhcpServerIP,
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; dhcpDNSIP, dhcpSubnet
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; The message is stored in dhcpMsg
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;
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;***************************************************************************
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parse_response:
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DEBUGF 1,"Parsing response\n"
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mov edx, [dhcpMsg]
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mov [dhcpMsgType_rx], 0
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; Verify if session ID matches
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mov eax, [dhcpXID]
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cmp dword[edx+4], eax
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jne .done
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push dword [edx+16]
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pop [dhcp.ip]
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DEBUGF 1,"Client: %u.%u.%u.%u\n", [edx+16]:1, [edx+17]:1, [edx+18]:1, [edx+19]:1
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; TODO: check if there really are options
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mov al, 240 ; Point to first option
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movzx ecx, al
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.next_option:
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add edx, ecx
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mov al, [edx] ; get message identifier
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cmp al, 0xff ; End of options?
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je .done
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cmp al, 0
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je .pad
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; TODO: check if we still are inside the buffer
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inc edx
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movzx ecx, byte [edx] ; get data length
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inc edx ; point to data
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cmp al, dhcp_msg_type ; Msg type is a single byte option
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je .msgtype
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cmp al, dhcp_dhcp_server_id
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je .server
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cmp al, dhcp_address_time
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je .lease
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cmp al, dhcp_subnet_mask
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je .subnet
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cmp al, dhcp_router
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je .router
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cmp al, dhcp_domain_server
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je .dns
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DEBUGF 1,"Unsupported DHCP option: %u\n", al
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jmp .next_option
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.pad:
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xor ecx, ecx
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inc ecx
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jmp .next_option
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.msgtype:
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mov al, [edx]
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mov [dhcpMsgType_rx], al
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DEBUGF 1,"DHCP Msg type: %u\n", al
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jmp .next_option ; Get next option
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.server:
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mov eax, [edx]
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mov [dhcpServerIP], eax
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DEBUGF 1,"Server: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1
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jmp .next_option
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.lease:
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pusha
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mov eax,[edx]
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bswap eax
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mov [dhcpLease],eax
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DEBUGF 1,"Lease: %d\n",eax
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popa
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jmp .next_option
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.subnet:
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push dword [edx]
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pop [dhcp.subnet]
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DEBUGF 1,"Subnet: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1
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jmp .next_option
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.router:
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push dword [edx]
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pop [dhcp.gateway]
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DEBUGF 1,"Gateway: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1
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jmp .next_option
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.dns:
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push dword [edx]
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pop [dhcp.dns]
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DEBUGF 1,"DNS: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1
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jmp .next_option
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.done:
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stdcall mem.Free, [dhcpMsg]
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ret
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dhcp_fail:
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mcall close, [socketNum]
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dhcp_fail2:
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DEBUGF 1,"DHCP failed\n"
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link_local:
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call random
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mov cx, ax
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shl ecx, 16
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mov cx, 0xfea9 ; IP 169.254.0.0 link local net, see RFC3927
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mov ebx, API_IPv4 + 3
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mov bh, [device]
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mcall 76, , ecx ; mask is 255.255.0.0
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DEBUGF 2,"Link Local IP assigned: 169.254.%u.%u\n", [generator+0]:1, [generator+1]:1
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mov bl, 7
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mcall 76, , 0xffff
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mov bl, 9
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mcall 76, , 0x0
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mov bl, 5
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mcall 76, , 0x0
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mcall 5, PROBE_WAIT*100
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xor esi, esi
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probe_loop:
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call random ; create a pseudo random number in eax (seeded by MAC)
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cmp al, PROBE_MIN*100 ; check if al is bigger then PROBE_MIN
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jae @f ; all ok
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add al, (PROBE_MAX-PROBE_MIN)*100 ; al is too small
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@@:
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cmp al, PROBE_MAX*100
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jbe @f
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sub al, (PROBE_MAX-PROBE_MIN)*100
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@@:
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movzx ebx,al
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DEBUGF 1,"Waiting %u0ms\n",ebx
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mcall 5
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DEBUGF 1,"Sending Probe\n"
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mov ebx, API_ARP + 6
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mov bh, [device]
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mcall 76
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inc esi
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cmp esi, PROBE_NUM
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jb probe_loop
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; now we wait further ANNOUNCE_WAIT seconds and send ANNOUNCE_NUM ARP announces. If any other host has assingned
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; IP within this time, we should create another adress, that have to be done later
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DEBUGF 1,"Waiting %us\n", ANNOUNCE_WAIT
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mcall 5, ANNOUNCE_WAIT*100
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xor esi, esi
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announce_loop:
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DEBUGF 1,"Sending Announce\n"
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mov ebx, API_ARP + 6
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mov bh, [device]
|
|
mcall 76
|
|
|
|
inc esi
|
|
cmp esi,ANNOUNCE_NUM
|
|
je @f
|
|
|
|
DEBUGF 1,"Waiting %us\n", ANNOUNCE_INTERVAL
|
|
mcall 5, ANNOUNCE_INTERVAL*100
|
|
jmp announce_loop
|
|
@@:
|
|
jmp wait_for_link_down
|
|
|
|
|
|
socket_error:
|
|
DEBUGF 2,"Socket error\n"
|
|
fail:
|
|
DEBUGF 2,"Zeroconf failed!\n"
|
|
mcall -1
|
|
|
|
|
|
random: ; Pseudo random actually
|
|
|
|
mov eax, [generator]
|
|
add eax, -43ab45b5h
|
|
ror eax, 1
|
|
bswap eax
|
|
xor eax, dword[MAC]
|
|
ror eax, 1
|
|
xor eax, dword[MAC+2]
|
|
mov [generator], eax
|
|
|
|
ret
|
|
|
|
|
|
|
|
ip_str_to_dword:
|
|
push edx
|
|
|
|
; This code validates if the query is an IP containing 4 numbers and 3 dots
|
|
|
|
xor al, al ; make al (dot count) zero
|
|
|
|
@@:
|
|
cmp byte[edx],'0' ; check if this byte is a number, if not jump to no_IP
|
|
jl no_IP ;
|
|
cmp byte[edx],'9' ;
|
|
jg no_IP ;
|
|
|
|
inc edx ; the byte was a number, so lets check the next byte
|
|
|
|
cmp byte[edx],0 ; is this byte zero? (have we reached end of query?)
|
|
jz @f ; jump to next @@ then
|
|
cmp byte[edx],':'
|
|
jz @f
|
|
|
|
cmp byte[edx],'.' ; is this byte a dot?
|
|
jne @r ; if not, jump to previous @@
|
|
|
|
inc al ; the byte was a dot so increment al(dot count)
|
|
inc edx ; next byte
|
|
jmp @r ; lets check for numbers again (jump to previous @@)
|
|
|
|
@@: ; we reach this when end of query reached
|
|
cmp al,3 ; check if there where 3 dots
|
|
jnz no_IP ; if not, jump to no_IP
|
|
|
|
; The following code will convert this IP into a dword and output it in eax
|
|
; If there is also a port number specified, this will be returned in ebx, otherwise ebx is -1
|
|
|
|
pop esi ; edx (query address) was pushed onto stack and is now popped in esi
|
|
|
|
xor edx, edx ; result
|
|
xor eax, eax ; current character
|
|
xor ebx, ebx ; current byte
|
|
|
|
.outer_loop:
|
|
shl edx, 8
|
|
add edx, ebx
|
|
xor ebx, ebx
|
|
.inner_loop:
|
|
lodsb
|
|
test eax, eax
|
|
jz .finish
|
|
cmp al, '.'
|
|
jz .outer_loop
|
|
sub eax, '0'
|
|
imul ebx, 10
|
|
add ebx, eax
|
|
jmp .inner_loop
|
|
.finish:
|
|
shl edx, 8
|
|
add edx, ebx
|
|
|
|
bswap edx ; we want little endian order
|
|
|
|
ret
|
|
|
|
no_IP:
|
|
pop edx
|
|
xor edx, edx
|
|
|
|
ret
|
|
|
|
; DATA AREA
|
|
|
|
align 16
|
|
@IMPORT:
|
|
|
|
library \
|
|
libini,'libini.obj'
|
|
|
|
import libini, \
|
|
ini.get_str,'ini_get_str'
|
|
|
|
include_debug_strings
|
|
|
|
str_ip db 'ip', 0
|
|
str_subnet db 'subnet', 0
|
|
str_gateway db 'gateway', 0
|
|
str_dns db 'dns', 0
|
|
str_ipconfig db 'ipconfig', 0
|
|
str_type db 'type', 0
|
|
|
|
|
|
sockaddr1:
|
|
|
|
dw AF_INET4
|
|
dw 68 shl 8 ; local port
|
|
dd 0 ; local IP
|
|
|
|
rb 10
|
|
|
|
|
|
sockaddr2:
|
|
|
|
dw AF_INET4
|
|
dw 67 shl 8 ; destination port
|
|
dd -1 ; destination IP
|
|
|
|
rb 10
|
|
|
|
notify_struct:
|
|
dd 7 ; run application
|
|
dd 0
|
|
.msg dd 0
|
|
dd 0
|
|
dd 0
|
|
db '/sys/@notify', 0
|
|
|
|
str_connected db '"You are now connected to the network." -N', 0
|
|
|
|
path db '/sys/settings/network.ini',0
|
|
|
|
IM_END:
|
|
|
|
device db 1
|
|
inibuf rb 16
|
|
tries db ?
|
|
|
|
dhcpMsgType_tx db ? ; sent
|
|
dhcpMsgType_rx db ? ; received
|
|
dhcpXID dd ?
|
|
dhcpLease dd ?
|
|
dhcpServerIP dd ?
|
|
|
|
dhcp:
|
|
.ip dd ?
|
|
.subnet dd ?
|
|
.dns dd ?
|
|
.gateway dd ?
|
|
|
|
|
|
dhcpMsgLen dd ?
|
|
socketNum dd ?
|
|
|
|
MAC dp ?
|
|
|
|
currTime dd ?
|
|
generator dd ?
|
|
|
|
dhcpMsg dd ?
|
|
|
|
timeout dd ?
|
|
|
|
I_END: |