;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; ICMP.INC ;;
;; ;;
;; Part of the tcp/ip network stack for KolibriOS ;;
;; ;;
;; Based on the work of [Johnny_B] and [smb] ;;
;; ;;
;; Written by hidnplayr@kolibrios.org ;;
;; ;;
;; GNU GENERAL PUBLIC LICENSE ;;
;; Version 2, June 1991 ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision: 5984 $
; ICMP types & codes
ICMP_ECHOREPLY = 0 ; echo reply message
ICMP_UNREACH = 3
ICMP_UNREACH_NET = 0 ; bad net
ICMP_UNREACH_HOST = 1 ; bad host
ICMP_UNREACH_PROTOCOL = 2 ; bad protocol
ICMP_UNREACH_PORT = 3 ; bad port
ICMP_UNREACH_NEEDFRAG = 4 ; IP_DF caused drop
ICMP_UNREACH_SRCFAIL = 5 ; src route failed
ICMP_UNREACH_NET_UNKNOWN = 6 ; unknown net
ICMP_UNREACH_HOST_UNKNOWN = 7 ; unknown host
ICMP_UNREACH_ISOLATED = 8 ; src host isolated
ICMP_UNREACH_NET_PROHIB = 9 ; prohibited access
ICMP_UNREACH_HOST_PROHIB = 10 ; ditto
ICMP_UNREACH_TOSNET = 11 ; bad tos for net
ICMP_UNREACH_TOSHOST = 12 ; bad tos for host
ICMP_UNREACH_FILTER_PROHIB = 13 ; admin prohib
ICMP_UNREACH_HOST_PRECEDENCE = 14 ; host prec vio.
ICMP_UNREACH_PRECEDENCE_CUTOFF = 15 ; prec cutoff
ICMP_SOURCEQUENCH = 4 ; Packet lost, slow down
ICMP_REDIRECT = 5 ; shorter route, codes:
ICMP_REDIRECT_NET = 0 ; for network
ICMP_REDIRECT_HOST = 1 ; for host
ICMP_REDIRECT_TOSNET = 2 ; for tos and net
ICMP_REDIRECT_TOSHOST = 3 ; for tos and host
ICMP_ALTHOSTADDR = 6 ; alternate host address
ICMP_ECHO = 8 ; echo service
ICMP_ROUTERADVERT = 9 ; router advertisement
ICMP_ROUTERADVERT_NORMAL = 0 ; normal advertisement
ICMP_ROUTERADVERT_NOROUTE_COMMON= 16 ; selective routing
ICMP_ROUTERSOLICIT = 10 ; router solicitation
ICMP_TIMXCEED = 11 ; time exceeded, code:
ICMP_TIMXCEED_INTRANS = 0 ; ttl==0 in transit
ICMP_TIMXCEED_REASS = 1 ; ttl==0 in reass
ICMP_PARAMPROB = 12 ; ip header bad
ICMP_PARAMPROB_ERRATPTR = 0 ; error at param ptr
ICMP_PARAMPROB_OPTABSENT = 1 ; req. opt. absent
ICMP_PARAMPROB_LENGTH = 2 ; bad length
ICMP_TSTAMP = 13 ; timestamp request
ICMP_TSTAMPREPLY = 14 ; timestamp reply
ICMP_IREQ = 15 ; information request
ICMP_IREQREPLY = 16 ; information reply
ICMP_MASKREQ = 17 ; address mask request
ICMP_MASKREPLY = 18 ; address mask reply
ICMP_TRACEROUTE = 30 ; traceroute
ICMP_DATACONVERR = 31 ; data conversion error
ICMP_MOBILE_REDIRECT = 32 ; mobile host redirect
ICMP_IPV6_WHEREAREYOU = 33 ; IPv6 where-are-you
ICMP_IPV6_IAMHERE = 34 ; IPv6 i-am-here
ICMP_MOBILE_REGREQUEST = 35 ; mobile registration req
ICMP_MOBILE_REGREPLY = 36 ; mobile registreation reply
ICMP_SKIP = 39 ; SKIP
ICMP_PHOTURIS = 40 ; Photuris
ICMP_PHOTURIS_UNKNOWN_INDEX = 1 ; unknown sec index
ICMP_PHOTURIS_AUTH_FAILED = 2 ; auth failed
ICMP_PHOTURIS_DECRYPT_FAILED = 3 ; decrypt failed
struct ICMP_header
Type db ?
Code db ?
Checksum dw ?
Identifier dw ?
SequenceNumber dw ?
ends
uglobal
align 4
ICMP_PACKETS_TX rd NET_DEVICES_MAX
ICMP_PACKETS_RX rd NET_DEVICES_MAX
endg
;-----------------------------------------------------------------
;
; ICMP_init
;
;-----------------------------------------------------------------
macro ICMP_init {
xor eax, eax
mov edi, ICMP_PACKETS_TX
mov ecx, 2*NET_DEVICES_MAX
rep stosd
}
;-----------------------------------------------------------------
;
; ICMP_input:
;
; This procedure will send reply's to ICMP echo's
; and insert packets into sockets when needed
;
; IN: Pointer to buffer in [esp]
; ebx = pointer to device struct
; ecx = ICMP Packet size
; edx = ptr to IPv4 header
; esi = ptr to ICMP Packet data
; edi = interface number*4
;
; OUT: /
;
;-----------------------------------------------------------------
align 4
ICMP_input:
DEBUGF DEBUG_NETWORK_VERBOSE, "ICMP_input\n"
; Dump all multicasts and broadcasts
mov eax, [IP_LIST + edi]
cmp eax, [edx + IPv4_header.DestinationAddress]
jne .dump
; Check the checksum
push esi ecx edx
push [esi + ICMP_header.Checksum]
mov [esi + ICMP_header.Checksum], 0
xor edx, edx
call checksum_1
call checksum_2
pop si
cmp dx, si
pop edx ecx esi
jne .checksum_mismatch
DEBUGF DEBUG_NETWORK_VERBOSE, "ICMP_input: Checksum OK\n"
; Update stats
inc [ICMP_PACKETS_RX + edi]
; Is this an echo request?
cmp [esi + ICMP_header.Type], ICMP_ECHO
je .echo_request
; Look for an open ICMP socket
pusha
mov ecx, socket_mutex
call mutex_lock
popa
add ecx, esi
sub ecx, edx
mov esi, edx
mov eax, net_sockets
.next_socket:
mov eax, [eax + SOCKET.NextPtr]
or eax, eax
jz .dump_
cmp [eax + SOCKET.Domain], AF_INET4
jne .next_socket
cmp [eax + SOCKET.Protocol], IP_PROTO_ICMP
jne .next_socket
pusha
mov ecx, socket_mutex
call mutex_unlock
popa
DEBUGF DEBUG_NETWORK_VERBOSE, "socket=%x\n", eax
pusha
lea ecx, [eax + SOCKET.mutex]
call mutex_lock
popa
jmp SOCKET_input
.echo_request:
; We'll reuse the packet so we can create the response as fast as possible
DEBUGF DEBUG_NETWORK_VERBOSE, "ICMP echo request\n"
; Change Packet type to reply
mov [esi + ICMP_header.Type], ICMP_ECHOREPLY
mov eax, [esp]
lea esi, [eax + NET_BUFF.data]
; Check frame type
cmp [eax + NET_BUFF.type], NET_BUFF_ETH
jne .not_ethernet
; exchange dest and source MAC in ETH header
push dword [esi + ETH_header.DstMAC]
push dword [esi + ETH_header.SrcMAC]
pop dword [esi + ETH_header.DstMAC]
pop dword [esi + ETH_header.SrcMAC]
push word [esi + ETH_header.DstMAC + 4]
push word [esi + ETH_header.SrcMAC + 4]
pop word [esi + ETH_header.DstMAC + 4]
pop word [esi + ETH_header.SrcMAC + 4]
add esi, sizeof.ETH_header
.not_ethernet:
; Exchange dest and source address in IP header
push [esi + IPv4_header.SourceAddress]
push [esi + IPv4_header.DestinationAddress]
pop [esi + IPv4_header.SourceAddress]
pop [esi + IPv4_header.DestinationAddress]
; Calculate IP header length
movzx ecx, [esi + IPv4_header.VersionAndIHL]
and ecx, 0x0f
shl cx, 2
mov edi, ecx ; put it in edi for later
; Calculate IP checksum
mov eax, esi
mov [eax + IPv4_header.HeaderChecksum], 0
xor edx, edx
call checksum_1
call checksum_2
mov [eax + IPv4_header.HeaderChecksum], dx
; Calculate ICMP packet length
movzx ecx, [eax + IPv4_header.TotalLength]
xchg ch, cl
sub ecx, edi ; IP packet length - IP header length = ICMP packet length
; Calculate ICMP checkSum
mov eax, esi
mov [esi + ICMP_header.Checksum], 0
xor edx, edx
call checksum_1
call checksum_2
mov [eax + ICMP_header.Checksum], dx
; Transmit the frame
DEBUGF DEBUG_NETWORK_VERBOSE, "ICMP transmitting reply\n"
call [ebx + NET_DEVICE.transmit]
test eax, eax
jnz @f
DEBUGF DEBUG_NETWORK_VERBOSE, "ICMP transmit failed\n"
call NET_ptr_to_num4
inc [ICMP_PACKETS_TX + edi]
@@:
ret
.dump_:
pusha
mov ecx, socket_mutex
call mutex_unlock
popa
DEBUGF DEBUG_NETWORK_ERROR, "ICMP_input: no socket found\n"
jmp .dump
.checksum_mismatch:
DEBUGF DEBUG_NETWORK_ERROR, "ICMP_input: checksum mismatch\n"
.dump:
DEBUGF DEBUG_NETWORK_VERBOSE, "ICMP_input: dumping\n"
call NET_BUFF_free
ret
if 0
;-----------------------------------------------------------------
;
; ICMP_output
;
; IN: eax = dest ip
; bh = type
; bl = code
; ecx = data length
; edx = source ip
; esi = data offset
; edi = identifier shl 16 + sequence number
;
;-----------------------------------------------------------------
align 4
ICMP_output:
DEBUGF DEBUG_NETWORK_VERBOSE, "Creating ICMP Packet\n"
push esi edi bx
add ecx, sizeof.ICMP_header
mov di, IP_PROTO_ICMP SHL 8 + 128 ; TTL
call IPv4_output
jz .exit
DEBUGF DEBUG_NETWORK_VERBOSE, "full icmp packet size: %u\n", edx
pop word [edi + ICMP_header.Type] ; Write both type and code bytes at once
pop dword [edi + ICMP_header.Identifier] ; identifier and sequence number
mov [edi + ICMP_header.Checksum], 0
push ebx ecx edx
mov esi, edi
xor edx, edx
call checksum_1
call checksum_2
mov [edi + ICMP_header.Checksum], dx
pop edx ecx ebx esi
sub ecx, sizeof.ICMP_header
add edi, sizeof.ICMP_header
push cx
shr cx, 2
rep movsd
pop cx
and cx, 3
rep movsb
sub edi, edx ;;; TODO: find a better way to remember start of packet
push edx edi
DEBUGF DEBUG_NETWORK_VERBOSE, "Sending ICMP Packet\n"
call [ebx + NET_DEVICE.transmit]
test eax, eax
jnz @f
call NET_ptr_to_num4
inc [ICMP_PACKETS_TX + edi]
@@:
ret
.exit:
DEBUGF DEBUG_NETWORK_ERROR, "Creating ICMP Packet failed\n"
add esp, 2*4 + 2
ret
end if
;-----------------------------------------------------------------
;
; ICMP_output_raw
;
; IN: eax = socket ptr
; ecx = data length
; edx = data pointer
;
;-----------------------------------------------------------------
align 4
ICMP_output_raw:
DEBUGF DEBUG_NETWORK_VERBOSE, "Creating ICMP Packet for socket %x, data ptr=%x\n", eax, edx
push edx
mov ebx, [eax + IP_SOCKET.device]
mov edx, [eax + IP_SOCKET.LocalIP]
mov edi, [eax + IP_SOCKET.RemoteIP]
mov al, [eax + IP_SOCKET.ttl]
mov ah, IP_PROTO_ICMP
call IPv4_output
jz .fail
pop esi
push eax
push edi ecx
DEBUGF DEBUG_NETWORK_VERBOSE, "copying %u bytes from %x to %x\n", ecx, esi, edi
rep movsb
pop ecx edi
mov [edi + ICMP_header.Checksum], 0
mov esi, edi
xor edx, edx
call checksum_1
call checksum_2
mov [edi + ICMP_header.Checksum], dx
DEBUGF DEBUG_NETWORK_VERBOSE, "Sending ICMP Packet\n"
call [ebx + NET_DEVICE.transmit]
test eax, eax
jnz @f
call NET_ptr_to_num4
inc [ICMP_PACKETS_TX + edi]
@@:
ret
.fail:
pop edx
DEBUGF DEBUG_NETWORK_ERROR, "Creating ICMP Packet failed\n"
or eax, -1
mov ebx, EMSGSIZE ;;; FIXME
ret
;-----------------------------------------------------------------
;
; ICMP_API
;
; This function is called by system function 75
;
; IN: subfunction number in bl
; device number in bh
; ecx, edx, .. depends on subfunction
;
; OUT:
;
;-----------------------------------------------------------------
align 4
ICMP_api:
movzx eax, bh
shl eax, 2
test bl, bl
jz .packets_tx ; 0
dec bl
jz .packets_rx ; 1
.error:
mov eax, -1
ret
.packets_tx:
mov eax, [ICMP_PACKETS_TX + eax]
ret
.packets_rx:
mov eax, [ICMP_PACKETS_RX + eax]
ret