5,12 → 5,6 |
; |
; by HidnPlayr & Derpenguin |
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TIMEOUT equ 60 ; in seconds |
BUFFER equ 1024 |
__DEBUG__ equ 1 |
__DEBUG_LEVEL__ equ 1; 1 = all, 2 = errors |
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use32 |
org 0x0 |
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22,111 → 16,87 |
dd I_END ; esp |
dd 0x0 , 0x0 ; I_Param , I_Icon |
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;include 'macros.inc' |
; CONFIGURATION |
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TIMEOUT equ 60 ; in seconds |
BUFFER equ 1024 ; in bytes |
__DEBUG__ equ 1 ; enable/disable |
__DEBUG_LEVEL__ equ 1 ; 1 = all, 2 = errors |
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; CONFIGURATION FOR LINK-LOCAL |
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PROBE_WAIT equ 1 ; second (initial random delay) |
PROBE_MIN equ 1 ; second (minimum delay till repeated probe) |
PROBE_MAX equ 2 ; seconds (maximum delay till repeated probe) |
PROBE_NUM equ 3 ; (number of probe packets) |
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ANNOUNCE_NUM equ 2 ; (number of announcement packets) |
ANNOUNCE_INTERVAL equ 2 ; seconds (time between announcement packets) |
ANNOUNCE_WAIT equ 2 ; seconds (delay before announcing) |
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MAX_CONFLICTS equ 10 ; (max conflicts before rate limiting) |
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RATE_LIMIT_INTERVAL equ 60 ; seconds (delay between successive attempts) |
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DEFEND_INTERVAL equ 10 ; seconds (min. wait between defensive ARPs) |
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include 'macros.inc' |
include 'eth.inc' |
include 'debug-fdo.inc' |
include 'dhcp.inc' |
include 'events.inc' |
include 'common.inc' |
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
; CONFIGURATION FOR LINK-LOCAL ; |
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
; ; |
PROBE_WAIT equ 1 ; second (initial random delay) ; |
PROBE_MIN equ 1 ; second (minimum delay till repeated probe) ; |
PROBE_MAX equ 2 ; seconds (maximum delay till repeated probe) ; |
PROBE_NUM equ 3 ; (number of probe packets) ; |
; ; |
ANNOUNCE_NUM equ 2 ; (number of announcement packets) ; |
ANNOUNCE_INTERVAL equ 2 ; seconds (time between announcement packets) ; |
ANNOUNCE_WAIT equ 2 ; seconds (delay before announcing) ; |
; ; |
MAX_CONFLICTS equ 10 ; (max conflicts before rate limiting) ; |
; ; |
RATE_LIMIT_INTERVAL equ 60 ; seconds (delay between successive attempts) ; |
; ; |
DEFEND_INTERVAL equ 10 ; seconds (min. wait between defensive ARPs) ; |
; ; |
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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START: ; start of execution |
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mov eax,40 ; Report events |
mov ebx,10000000b ; Only Stack |
int 0x40 |
set_event_mask event_network |
eth.set_network_drv 0x00000383 |
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mov eax,52 ; first, enable the stack (packet driver) |
mov ebx,2 |
mov ecx,0x00000383 |
int 0x40 |
DEBUGF 1,"Stack Initialized.\n" |
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DEBUGF 1,"DHCP: Stack Initialized.\n" |
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eth.status eax ; Read the Stack status |
test eax,eax ; if eax is zero, no driver was found |
jnz @f |
DEBUGF 1,"DHCP: No Card detected\n" |
DEBUGF 1,"No Card detected\n" |
jmp close |
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@@: |
DEBUGF 1,"DHCP: Detected card: %x\n",eax |
DEBUGF 1,"Detected card: %x\n",eax |
@@: |
eth.check_cable eax |
test al,al |
jnz @f |
DEBUGF 1,"DHCP: Ethernet Cable not connected\n" |
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mov eax,5 |
mov ebx,500 ; loop until cable is connected (check every 5 sec) |
int 0x40 |
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DEBUGF 1,"Ethernet Cable not connected\n" |
wait 500 ; loop until cable is connected (check every 5 sec) |
jmp @r |
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@@: |
DEBUGF 1,"DHCP: Ethernet Cable status: %d\n",al |
DEBUGF 1,"Ethernet Cable status: %d\n",al |
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eth.read_mac MAC |
DEBUGF 1,"DHCP: MAC address: %x-%x-%x-%x-%x-%x\n",[MAC]:2,[MAC+1]:2,[MAC+2]:2,[MAC+3]:2,[MAC+4]:2,[MAC+5]:2 |
DEBUGF 1,"MAC address: %x-%x-%x-%x-%x-%x\n",[MAC]:2,[MAC+1]:2,[MAC+2]:2,[MAC+3]:2,[MAC+4]:2,[MAC+5]:2 |
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; jmp apipa ; comment this out if you want to skip DHCP and continue with link-local |
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;*************************************************************************** |
; |
; DHCP rubish starts here |
; |
;*************************************************************************** |
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eth.check_port 68,eax ; Check if port 68 is available |
cmp eax,1 |
je @f |
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DEBUGF 1,"DHCP: Port 68 is already in use.\n" |
DEBUGF 1,"Port 68 is already in use!\n" |
jmp close |
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@@: |
eth.open_udp 68,67,-1,[socketNum] ; open socket (local,remote,ip,socket) |
DEBUGF 1,"DHCP: Socket opened: %d\n",eax |
DEBUGF 1,"Socket opened: %d\n",eax |
; Setup the first msg we will send |
mov byte [dhcpMsgType], 0x01 ; DHCP discover |
mov dword [dhcpLease], esi ; esi is still -1 (-1 = forever) |
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mov eax,26 |
mov ebx,9 |
int 0x40 |
get_time_counter eax |
imul eax,100 |
mov [currTime],eax |
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;*************************************************************************** |
; Function |
; buildRequest |
; |
; Description |
; Creates a DHCP request packet. |
; |
;*************************************************************************** |
buildRequest: |
buildRequest: ; Creates a DHCP request packet. |
xor eax,eax ; Clear dhcpMsg to all zeros |
mov edi,dhcpMsg |
mov ecx,BUFFER |
142,39 → 112,32 |
mov eax,[currTime] |
mov [edx+8], eax ; secs, our uptime |
mov [edx+10], byte 0x80 ; broadcast flag set |
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mov eax, dword [MAC] ; first 4 bytes of MAC |
mov [edx+28],dword eax |
mov ax, word [MAC+4] ; last 2 bytes of MAC |
mov [edx+32],word ax |
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mov [edx+236], dword 0x63538263 ; magic number |
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mov [edx+240], word 0x0135 ; option DHCP msg type |
mov al, [dhcpMsgType] |
mov [edx+240+2], al |
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mov [edx+240+3], word 0x0433 ; option Lease time = infinity |
mov eax, [dhcpLease] |
mov [edx+240+5], eax |
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mov [edx+240+9], word 0x0432 ; option requested IP address |
mov eax, [dhcpClientIP] |
mov [edx+240+11], eax |
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mov [edx+240+15], word 0x0437 ; option request list |
mov [edx+240+17], dword 0x0f060301 |
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cmp [dhcpMsgType], byte 0x01 ; Check which msg we are sending |
jne br001 |
jne request_options |
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mov [edx+240+21], byte 0xff ; "Discover" options |
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mov [dhcpMsgLen], dword 262 ; end of options marker |
jmp ctr000 |
jmp send_request |
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br001: ; "Request" options |
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request_options: |
mov [edx+240+21], word 0x0436 ; server IP |
mov eax, [dhcpServerIP] |
mov [edx+240+23], eax |
183,8 → 146,7 |
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mov [dhcpMsgLen], dword 268 |
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ctr000: |
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send_request: |
eth.write_udp [socketNum],[dhcpMsgLen],dhcpMsg ; write to socket ( send broadcast request ) |
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mov eax, dhcpMsg ; Setup the DHCP buffer to receive response |
197,14 → 159,14 |
eth.poll [socketNum] |
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test eax,eax |
jnz ctr002 |
jnz read_data |
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DEBUGF 2,"DHCP: Timeout!\n" |
DEBUGF 2,"Timeout!\n" |
eth.close_udp [socketNum] |
jmp apipa ; no server found, lets try zeroconf |
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ctr002: ; we have data - this will be the response |
read_data: ; we have data - this will be the response |
eth.read_packet [socketNum], dhcpMsg, BUFFER |
mov [dhcpMsgLen], eax |
eth.close_udp [socketNum] |
240,13 → 202,8 |
cmp [dhcpMsgType], byte 0x05 ; Was the response an ACK? It should be |
jne apipa ; NO - so we do zeroconf |
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close: |
DEBUGF 1,"DHCP: Exiting\n" |
jmp close |
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mov eax,-1 ; at last, exit |
int 0x40 |
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;*************************************************************************** |
; Function |
; parseResponse |
261,7 → 218,7 |
; |
;*************************************************************************** |
parseResponse: |
DEBUGF 1,"DHCP: Data received, parsing response\n" |
DEBUGF 1,"Data received, parsing response\n" |
mov edx, dhcpMsg |
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pusha |
268,18 → 225,21 |
eth.set_IP [edx+16] |
mov eax,[edx] |
mov [dhcpClientIP],eax |
DEBUGF 1,"DHCP: Client: %u.%u.%u.%u\n",[edx+16]:1,[edx+17]:1,[edx+18]:1,[edx+19]:1 |
DEBUGF 1,"Client: %u.%u.%u.%u\n",[edx+16]:1,[edx+17]:1,[edx+18]:1,[edx+19]:1 |
popa |
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add edx, 240 ; Point to first option |
xor ecx, ecx |
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next_option: |
add edx, ecx |
pr001: |
mov al, [edx] |
cmp al, 0xff ; End of options? |
je pr_exit |
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cmp al, 53 ; Msg type is a single byte option |
jne pr002 |
cmp al, dhcp_msg_type ; Msg type is a single byte option |
jne @f |
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mov al, [edx+2] |
mov [dhcpMsgType], al |
286,77 → 246,69 |
add edx, 3 |
jmp pr001 ; Get next option |
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pr002: |
@@: |
inc edx |
movzx ecx, byte [edx] |
inc edx ; point to data |
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cmp al, 54 ; server id |
jne pr0021 |
mov eax, [edx] ; All options are 4 bytes, so get it |
cmp al, dhcp_dhcp_server_id ; server ip |
jne @f |
mov eax, [edx] |
mov [dhcpServerIP], eax |
DEBUGF 1,"DHCP: Server: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
jmp pr003 |
DEBUGF 1,"Server: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
jmp next_option |
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pr0021: |
cmp al, 51 ; lease |
jne pr0022 |
@@: |
cmp al, dhcp_address_time |
jne @f |
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pusha |
DEBUGF 1,"DHCP: lease: " |
mov eax,[edx] |
bswap eax |
mov [dhcpLease],eax |
cmp dword[edx],-1 ; i really don't know, how to test it |
jne no_lease_forever |
DEBUGF 1,"forever\n" |
jmp @f |
no_lease_forever: |
DEBUGF 1,"%d\n",eax |
@@: |
DEBUGF 1,"lease: %d\n",eax |
popa |
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jmp pr003 |
jmp next_option |
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pr0022: |
cmp al, 1 ; subnet mask |
jne pr0023 |
@@: |
cmp al, dhcp_subnet_mask |
jne @f |
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pusha |
eth.set_SUBNET [edx] |
DEBUGF 1,"DHCP: Subnet: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
DEBUGF 1,"Subnet: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
popa |
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jmp pr003 |
jmp next_option |
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pr0023: |
cmp al, 3 ; gateway ip |
jne pr0024 |
@@: |
cmp al, dhcp_router |
jne @f |
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pusha |
eth.set_GATEWAY [edx] |
DEBUGF 1,"DHCP: Gateway: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
DEBUGF 1,"Gateway: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
popa |
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jmp next_option |
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pr0024: |
cmp al, 6 ; dns ip |
jne pr003 |
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@@: |
cmp al, dhcp_domain_server |
jne next_option |
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pusha |
eth.set_DNS [edx] |
DEBUGF 1,"DHCP: DNS: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
DEBUGF 1,"DNS: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
popa |
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jmp next_option |
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pr003: |
add edx, ecx |
jmp pr001 |
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pr_exit: |
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; DEBUGF 1,"DHCP: Sending ARP probe\n" |
; eth.ARP_ANNOUNCE [dhcpClientIP] ; send an ARP announc packet |
; DEBUGF 1,"Sending ARP announce\n" |
; eth.ARP_ANNOUNCE [dhcpClientIP] ; send an ARP announce packet |
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jmp close |
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365,14 → 317,12 |
mov ecx,0xfea9 ; IP 169.254.0.0 link local net, see RFC3927 |
mov cx,ax |
eth.set_IP ecx ; mask is 255.255.0.0 |
DEBUGF 1,"ZeroConf: Link Local IP assinged: 169.254.%u.%u\n",[generator+2]:1,[generator+3]:1 |
DEBUGF 1,"Link Local IP assinged: 169.254.%u.%u\n",[generator+2]:1,[generator+3]:1 |
eth.set_SUBNET 0xffff |
eth.set_GATEWAY 0x0 |
eth.set_DNS 0x0 |
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mov eax,5 |
mov ebx,PROBE_WAIT*100 |
int 0x40 |
wait PROBE_WAIT*100 |
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xor esi,esi |
probe_loop: |
389,45 → 339,44 |
@@: |
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movzx ebx,al |
DEBUGF 1,"ZeroConf: Waiting %u0ms\n",ebx |
mov eax,5 |
int 0x40 |
DEBUGF 1,"Waiting %u0ms\n",ebx |
wait ebx |
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DEBUGF 1,"ZeroConf: Sending Probe\n" |
; eth.ARP_PROBE MAC2 |
DEBUGF 1,"Sending Probe\n" |
; eth.ARP_PROBE MAC |
inc esi |
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cmp esi,PROBE_NUM |
jl probe_loop |
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; now we wait further ANNOUNCE_WAIT seconds and send ANNOUNCE_NUM ARP announces. If any other host has assingnd |
; now we wait further ANNOUNCE_WAIT seconds and send ANNOUNCE_NUM ARP announces. If any other host has assingned |
; IP within this time, we should create another adress, that have to be done later |
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DEBUGF 1,"ZeroConf: Waiting %us\n",ANNOUNCE_WAIT |
mov eax,5 |
mov ebx,ANNOUNCE_WAIT*100 |
int 0x40 |
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DEBUGF 1,"Waiting %us\n",ANNOUNCE_WAIT |
wait ANNOUNCE_WAIT*100 |
xor esi,esi |
announce_loop: |
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DEBUGF 1,"ZeroConf: Sending Announce\n" |
; eth.ARP_ANNOUNCE MAC2 |
DEBUGF 1,"Sending Announce\n" |
; eth.ARP_ANNOUNCE MAC |
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inc esi |
cmp esi,ANNOUNCE_NUM |
je @f |
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DEBUGF 1,"ZeroConf: Waiting %us\n",ANNOUNCE_INTERVAL |
mov eax,5 |
mov ebx,ANNOUNCE_INTERVAL*100 |
int 0x40 |
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DEBUGF 1,"Waiting %us\n",ANNOUNCE_INTERVAL |
wait ANNOUNCE_INTERVAL*100 |
jmp announce_loop |
@@: |
jmp close ; we should, instead of closing, detect ARP conflicts and detect if cable keeps connected ;) |
; we should, instead of closing, detect ARP conflicts and detect if cable keeps connected ;) |
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close: |
DEBUGF 1,"Exiting\n" |
exit ; at last, exit |
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random: |
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mov eax,[generator] |
add eax,-43ab45b5h |
ror eax,1 |
436,13 → 385,12 |
ror eax,1 |
xor eax,dword[MAC+2] |
mov [generator],eax |
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ret |
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; DATA AREA |
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include_debug_strings ; ALWAYS present in data section |
include_debug_strings |
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IM_END: |
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