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Connect to DHCP server only when link is active. (and reconnect when cable was reconnected) 

git-svn-id: svn://kolibrios.org@5391 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
hidnplayr 2015-02-03 19:41:23 +00:00
parent f2f52bfc14
commit 2fb146ac3e
1 changed files with 171 additions and 138 deletions
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309
programs/network/zeroconf/zeroconf.asm
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@ -1,6 +1,6 @@
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2010-2014. All rights reserved. ;;
;; Copyright (C) KolibriOS team 2010-2015. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; zeroconfig.asm - Zeroconfig service for KolibriOS ;;
@ -62,116 +62,84 @@ include '../../network.inc'
include 'dhcp.inc'
include '../../dll.inc'
Ip2dword:
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
START:
mcall 40, EVM_STACK2
DEBUGF 2,"Zero-config service loaded\n"
.wait:
mov ebx, API_ETH + 0
mov bh, [device]
mcall 76 ; get MAC of ethernet interface 1
cmp eax, -1
jne .start
mcall 10
jmp .wait
.start:
mov word[MAC], bx
mov dword[MAC+2], eax
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
mcall 40, EVM_STACK
mcall 68, 11
stdcall dll.Load,@IMPORT
or eax, eax
jnz try_dhcp
jnz fail
DEBUGF 2,"Zero-config service loaded\n"
mcall 40, EVM_STACK2
wait_for_link_up:
mov bh, [device]
mov bl, 0 ; Get device type
mcall 74
cmp eax, 1 ; Ethernet
jne .wait
mov bl, 10 ; Get Link status
mcall 74
test eax, eax
jnz .go
.wait:
mcall 10
jmp wait_for_link_up
.go:
mov ebx, API_ETH + 0
mov bh, [device]
mcall 76 ; get MAC of the ethernet interface
mov word[MAC], bx
mov dword[MAC+2], eax
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
invoke ini.get_str, path, str_ipconfig, str_type, inibuf, 16, 0
cmp dword[inibuf], 'stat'
jne try_dhcp
je static
jmp try_dhcp
wait_for_link_down:
; TODO: detect ARP conflicts
mcall 40, EVM_STACK2
.loop:
mcall 10
mov bh, [device]
mov bl, 0 ; Get device type
mcall 74
cmp eax, 0 ; No device
je .down
mov bl, 10 ; Get Link status
mcall 74
test eax, eax
jnz .loop
.down:
xor ecx, ecx
mov ebx, API_IPv4 + 3
mov bh, [device]
mcall 76 ; ip
mov bl, 5
mcall 76 ; dns
mov bl, 7
mcall 76 ; subnet
mov bl, 9
mcall 76 ; gateway
jmp wait_for_link_up
static:
DEBUGF 1,"Applying Static IP settings\n"
invoke ini.get_str, path, str_ipconfig, str_ip, inibuf, 16, 0
mov edx, inibuf
call Ip2dword
call ip_str_to_dword
mov ecx, edx
mov ebx, API_IPv4 + 3 ; set IP
mov bh, [device]
@ -179,7 +147,7 @@ START:
invoke ini.get_str, path, str_ipconfig, str_gateway, inibuf, 16, 0
mov edx, inibuf
call Ip2dword
call ip_str_to_dword
mov ecx, edx
mov ebx, API_IPv4 + 9 ; set gateway
mov bh, [device]
@ -187,7 +155,7 @@ START:
invoke ini.get_str, path, str_ipconfig, str_dns, inibuf, 16, 0
mov edx, inibuf
call Ip2dword
call ip_str_to_dword
mov ecx, edx
mov ebx, API_IPv4 + 5 ; set DNS
mov bh, [device]
@ -195,36 +163,39 @@ START:
invoke ini.get_str, path, str_ipconfig, str_subnet, inibuf, 16, 0
mov edx, inibuf
call Ip2dword
call ip_str_to_dword
mov ecx, edx
mov ebx, API_IPv4 + 7 ; set subnet
mov bh, [device]
mcall 76
mcall -1
mov [notify_struct.msg], str_connected
mcall 70, notify_struct
jmp wait_for_link_down
try_dhcp:
DEBUGF 2,"Trying to contact DHCP server\n"
mcall 40, EVM_STACK
mcall 75, 0, AF_INET4, SOCK_DGRAM, 0 ; open socket (parameters: domain, type, reserved)
cmp eax, -1
je error
je socket_error
mov [socketNum], eax
DEBUGF 1,"Socket %x opened\n", eax
mcall 75, 2, [socketNum], sockaddr1, 18 ; bind socket to local port 68
cmp eax, -1
je error
je socket_error
DEBUGF 1,"Socket Bound to local port 68\n"
mcall 75, 4, [socketNum], sockaddr2, 18 ; connect to 255.255.255.255 on port 67
cmp eax, -1
je error
je socket_error
DEBUGF 1,"Connected to 255.255.255.255 on port 67\n"
@ -242,18 +213,16 @@ build_request: ; Creates a DHCP request
DEBUGF 1,"Building request\n"
stdcall mem.Alloc, BUFFER
mov [dhcpMsg], eax
test eax, eax
jz dhcp_error
;;; todo: skip this bullcrap
jz dhcp_fail2
mov [dhcpMsg], eax
mov edi, eax
mov ecx, BUFFER
xor eax, eax
rep stosb
;; todo: put this in a buffer instead of writing bytes and words!
;; todo: put this in one buffer we can copy, instead of writing bytes and words!
mov edx, [dhcpMsg]
@ -261,7 +230,7 @@ build_request: ; Creates a DHCP request
mov [edx], byte 0x01 ; Boot request
mov [edx+1], byte 0x01 ; Ethernet
mov [edx+2], byte 0x06 ; Ethernet h/w len
mov [edx+4], dword 0x11223344 ; xid ;;;;;;;
mov [edx+4], dword 0x11223344 ; xid ;;;;;;; FIXME
mov eax, [currTime]
mov [edx+8], eax ; secs, our uptime
mov [edx+10], byte 0x80 ; broadcast flag set
@ -303,12 +272,12 @@ request_options:
send_dhcpmsg:
DEBUGF 1,"Sending DHCP discover/request\n"
mcall 75, 6, [socketNum], [dhcpMsg], [dhcpMsgLen] ; write to socket ( send broadcast request )
mcall 75, 6, [socketNum], [dhcpMsg], [dhcpMsgLen] ; write to socket (send broadcast request)
mcall 26, 9
add eax, TIMEOUT*100
mov [timeout], eax
.wait:
mcall 23, TIMEOUT ; wait for data
mcall 23, TIMEOUT ; wait for data (with timeout)
read_data: ; we have data - this will be the response
mcall 75, 7, [socketNum], [dhcpMsg], BUFFER, MSG_DONTWAIT ; read data from socket
@ -322,7 +291,7 @@ read_data: ; we hav
DEBUGF 2,"No answer from DHCP server\n"
dec [tries]
jnz send_dhcpmsg ; try again
jmp dhcp_error ; fail
jmp dhcp_fail
@@:
DEBUGF 1,"%d bytes received\n", eax
@ -344,19 +313,15 @@ read_data: ; we hav
cmp [dhcpMsgType], 0x03 ; did we send a request?
je request
call dhcp_end ; we should never reach here ;)
jmp exit
; we should never reach here ;)
jmp fail
discover:
call parse_response
cmp [dhcpMsgType2], 0x02 ; Was the response an offer?
je send_request
jne dhcp_fail
call dhcp_end
jmp link_local
send_request:
DEBUGF 1, "Got offer, making request\n"
mov [dhcpMsgType], 0x03 ; make it a request
jmp build_request
@ -367,11 +332,11 @@ request:
cmp [dhcpMsgType2], 0x05 ; Was the response an ACK? It should be
jne read_data ; NO - read next packets
DEBUGF 2, "Setting IP using DHCP\n"
DEBUGF 2, "IP assigned by DHCP server successfully\n"
mov [notify_struct.msg], str_connected
mcall 70, notify_struct
call dhcp_end
call dhcp_fail
mov ebx, API_IPv4 + 3
mov bh, [device]
@ -383,13 +348,8 @@ request:
mov bl, 9
mcall 76, , [dhcp.gateway] ; gateway
jmp exit
jmp wait_for_link_down
dhcp_end:
mcall close, [socketNum]
stdcall mem.Free, [dhcpMsg]
ret
;***************************************************************************
; Function
@ -481,7 +441,7 @@ parse_response:
mov eax,[edx]
bswap eax
mov [dhcpLease],eax
DEBUGF 1,"lease: %d\n",eax
DEBUGF 1,"Lease: %d\n",eax
popa
jmp .next_option
@ -506,10 +466,13 @@ parse_response:
.done:
ret
dhcp_fail:
mcall close, [socketNum]
stdcall mem.Free, [dhcpMsg]
dhcp_error:
call dhcp_end
dhcp_fail2:
DEBUGF 1,"DHCP failed\n"
link_local:
call random
@ -577,13 +540,13 @@ link_local:
mcall 5, ANNOUNCE_INTERVAL*100
jmp announce_loop
@@:
jmp exit
jmp wait_for_link_down
error:
socket_error:
DEBUGF 2,"Socket error\n"
exit: ; we should, instead of closing, detect ARP conflicts and detect if cable keeps connected ;)
DEBUGF 2,"Exiting\n"
fail:
DEBUGF 2,"Zeroconf failed!\n"
mcall -1
@ -600,6 +563,76 @@ random: ; Pseudo random actually
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