WebSVN – Kolibri OS – Blame – /kernel/trunk/network/icmp.inc

Rev	Author	Line No.	Line
3545	hidnplayr	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
		3	;; Copyright (C) KolibriOS team 2004-2010. All rights reserved. ;;
		4	;; Distributed under terms of the GNU General Public License ;;
		5	;; ;;
		6	;; ICMP.INC ;;
		7	;; ;;
		8	;; Part of the tcp/ip network stack for KolibriOS ;;
		9	;; ;;
		10	;; Based on the work of [Johnny_B] and [smb] ;;
		11	;; ;;
		12	;; Written by hidnplayr@kolibrios.org ;;
		13	;; ;;
		14	;; GNU GENERAL PUBLIC LICENSE ;;
		15	;; Version 2, June 1991 ;;
		16	;; ;;
		17	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		18
		19	$Revision: 2924 $
		20
		21	; ICMP types & codes
		22
		23	ICMP_ECHOREPLY = 0 ; echo reply message
		24
		25	ICMP_UNREACH = 3
		26	ICMP_UNREACH_NET = 0 ; bad net
		27	ICMP_UNREACH_HOST = 1 ; bad host
		28	ICMP_UNREACH_PROTOCOL = 2 ; bad protocol
		29	ICMP_UNREACH_PORT = 3 ; bad port
		30	ICMP_UNREACH_NEEDFRAG = 4 ; IP_DF caused drop
		31	ICMP_UNREACH_SRCFAIL = 5 ; src route failed
		32	ICMP_UNREACH_NET_UNKNOWN = 6 ; unknown net
		33	ICMP_UNREACH_HOST_UNKNOWN = 7 ; unknown host
		34	ICMP_UNREACH_ISOLATED = 8 ; src host isolated
		35	ICMP_UNREACH_NET_PROHIB = 9 ; prohibited access
		36	ICMP_UNREACH_HOST_PROHIB = 10 ; ditto
		37	ICMP_UNREACH_TOSNET = 11 ; bad tos for net
		38	ICMP_UNREACH_TOSHOST = 12 ; bad tos for host
		39	ICMP_UNREACH_FILTER_PROHIB = 13 ; admin prohib
3556	hidnplayr	40	ICMP_UNREACH_HOST_PRECEDENCE = 14 ; host prec vio.
		41	ICMP_UNREACH_PRECEDENCE_CUTOFF = 15 ; prec cutoff
3545	hidnplayr	42
		43	ICMP_SOURCEQUENCH = 4 ; Packet lost, slow down
		44
		45	ICMP_REDIRECT = 5 ; shorter route, codes:
		46	ICMP_REDIRECT_NET = 0 ; for network
		47	ICMP_REDIRECT_HOST = 1 ; for host
		48	ICMP_REDIRECT_TOSNET = 2 ; for tos and net
		49	ICMP_REDIRECT_TOSHOST = 3 ; for tos and host
		50
		51	ICMP_ALTHOSTADDR = 6 ; alternate host address
		52	ICMP_ECHO = 8 ; echo service
		53	ICMP_ROUTERADVERT = 9 ; router advertisement
		54	ICMP_ROUTERADVERT_NORMAL = 0 ; normal advertisement
		55	ICMP_ROUTERADVERT_NOROUTE_COMMON= 16 ; selective routing
		56
		57	ICMP_ROUTERSOLICIT = 10 ; router solicitation
		58	ICMP_TIMXCEED = 11 ; time exceeded, code:
		59	ICMP_TIMXCEED_INTRANS = 0 ; ttl==0 in transit
		60	ICMP_TIMXCEED_REASS = 1 ; ttl==0 in reass
		61
		62	ICMP_PARAMPROB = 12 ; ip header bad
		63	ICMP_PARAMPROB_ERRATPTR = 0 ; error at param ptr
		64	ICMP_PARAMPROB_OPTABSENT = 1 ; req. opt. absent
		65	ICMP_PARAMPROB_LENGTH = 2 ; bad length
		66
		67	ICMP_TSTAMP = 13 ; timestamp request
		68	ICMP_TSTAMPREPLY = 14 ; timestamp reply
		69	ICMP_IREQ = 15 ; information request
		70	ICMP_IREQREPLY = 16 ; information reply
		71	ICMP_MASKREQ = 17 ; address mask request
		72	ICMP_MASKREPLY = 18 ; address mask reply
		73	ICMP_TRACEROUTE = 30 ; traceroute
		74	ICMP_DATACONVERR = 31 ; data conversion error
		75	ICMP_MOBILE_REDIRECT = 32 ; mobile host redirect
		76	ICMP_IPV6_WHEREAREYOU = 33 ; IPv6 where-are-you
		77	ICMP_IPV6_IAMHERE = 34 ; IPv6 i-am-here
		78	ICMP_MOBILE_REGREQUEST = 35 ; mobile registration req
		79	ICMP_MOBILE_REGREPLY = 36 ; mobile registreation reply
		80	ICMP_SKIP = 39 ; SKIP
		81
		82	ICMP_PHOTURIS = 40 ; Photuris
		83	ICMP_PHOTURIS_UNKNOWN_INDEX = 1 ; unknown sec index
		84	ICMP_PHOTURIS_AUTH_FAILED = 2 ; auth failed
		85	ICMP_PHOTURIS_DECRYPT_FAILED = 3 ; decrypt failed
		86
		87
		88
		89	struct ICMP_header
		90
		91	Type db ?
		92	Code db ?
		93	Checksum dw ?
		94	Identifier dw ?
		95	SequenceNumber dw ?
		96
		97	ends
		98
		99
		100	align 4
		101	uglobal
3600	hidnplayr	102	ICMP_PACKETS_TX rd NET_DEVICES_MAX
		103	ICMP_PACKETS_RX rd NET_DEVICES_MAX
3545	hidnplayr	104	endg
		105
		106
		107
		108	;-----------------------------------------------------------------
		109	;
		110	; ICMP_init
		111	;
		112	;-----------------------------------------------------------------
		113
		114	macro ICMP_init {
		115
		116	xor eax, eax
		117	mov edi, ICMP_PACKETS_TX
3600	hidnplayr	118	mov ecx, 2*NET_DEVICES_MAX
3545	hidnplayr	119	rep stosd
		120
		121	}
		122
		123
		124	;-----------------------------------------------------------------
		125	;
		126	; ICMP_input:
		127	;
		128	; This procedure will send reply's to ICMP echo's
		129	; and insert packets into sockets when needed
		130	;
		131	; IN: Pointer to buffer in [esp]
		132	; size of buffer in [esp+4]
		133	; ebx = pointer to device struct
		134	; ecx = ICMP Packet size
		135	; esi = ptr to ICMP Packet data
		136	; edi = ptr to ipv4 source and dest address
		137	;
		138	; OUT: /
		139	;
		140	;-----------------------------------------------------------------
		141	align 4
		142	ICMP_input:
		143
3556	hidnplayr	144	DEBUGF DEBUG_NETWORK_VERBOSE, "ICMP_input:\n"
3545	hidnplayr	145
		146	; First, check the checksum (altough some implementations ignore it)
		147
		148	push esi ecx
		149	push [esi + ICMP_header.Checksum]
		150	mov [esi + ICMP_header.Checksum], 0
		151	xor edx, edx
		152	call checksum_1
		153	call checksum_2
		154	pop si
		155	cmp dx, si
		156	pop ecx edx
		157	jne .checksum_mismatch
		158
		159	cmp [edx + ICMP_header.Type], ICMP_ECHO ; Is this an echo request?
		160	jne .check_sockets
		161
		162	; We well re-use the packet so we can create the response as fast as possible
		163	; Notice: this only works on pure ethernet
		164
3556	hidnplayr	165	DEBUGF DEBUG_NETWORK_VERBOSE, "got echo request\n"
3545	hidnplayr	166	mov [edx + ICMP_header.Type], ICMP_ECHOREPLY ; Change Packet type to reply
		167
		168	mov esi, [esp] ; Start of buffer
		169
		170	; Update stats (and validate device ptr)
		171	call NET_ptr_to_num
3601	hidnplayr	172	cmp edi, -1
3545	hidnplayr	173	je .dump
		174	inc [ICMP_PACKETS_RX + 4*edi]
		175	inc [ICMP_PACKETS_TX + 4*edi]
		176
3601	hidnplayr	177	cmp ebx, LOOPBACK_DEVICE
		178	je .loopback
		179
		180	; FIXME: dont assume device is an ethernet device!
		181
3545	hidnplayr	182	; exchange dest and source address in IP header
		183	; exchange dest and source MAC in ETH header
		184	push dword [esi + ETH_header.DstMAC]
		185	push dword [esi + ETH_header.SrcMAC]
		186	pop dword [esi + ETH_header.DstMAC]
		187	pop dword [esi + ETH_header.SrcMAC]
		188	push word [esi + ETH_header.DstMAC + 4]
		189	push word [esi + ETH_header.SrcMAC + 4]
		190	pop word [esi + ETH_header.DstMAC + 4]
		191	pop word [esi + ETH_header.SrcMAC + 4]
3601	hidnplayr	192	add esi, sizeof.ETH_header-4
3545	hidnplayr	193
		194	.loopback:
3601	hidnplayr	195	add esi, 4
3545	hidnplayr	196	push [esi + IPv4_header.SourceAddress]
		197	push [esi + IPv4_header.DestinationAddress]
		198	pop [esi + IPv4_header.SourceAddress]
		199	pop [esi + IPv4_header.DestinationAddress]
		200
		201	; Recalculate ip header checksum
		202	movzx ecx, [esi + IPv4_header.VersionAndIHL] ; Calculate IP Header length by using IHL field
		203	and ecx, 0x0f
		204	shl cx, 2
		205	mov edi, ecx ; IP header length
		206	mov eax, edx ; ICMP packet start addr
		207
		208	push esi ; Calculate the IP checksum
		209	xor edx, edx ;
		210	call checksum_1 ;
		211	call checksum_2 ;
		212	pop esi ;
		213	mov [esi + IPv4_header.HeaderChecksum], dx ;
		214
		215	; Recalculate ICMP CheckSum
		216	movzx ecx, [esi + IPv4_header.TotalLength] ; Find length of IP Packet
		217	xchg ch, cl ;
		218	sub ecx, edi ; IP packet length - IP header length = ICMP packet length
		219
		220	mov esi, eax ; Calculate ICMP checksum
		221	xor edx, edx ;
		222	call checksum_1 ;
		223	call checksum_2 ;
		224	mov [eax + ICMP_header.Checksum], dx ;
		225
		226	; Transmit the packet (notice that packet ptr and packet size have been on stack since start of the procedure!)
		227	call [ebx + NET_DEVICE.transmit]
		228	ret
		229
		230
		231
		232
		233	.check_sockets:
		234	; Look for an open ICMP socket
		235
		236	mov esi, [edi] ; ipv4 source address
		237	mov eax, net_sockets
		238	.try_more:
		239	; mov , [edx + ICMP_header.Identifier]
		240	.next_socket:
		241	mov eax, [eax + SOCKET.NextPtr]
		242	or eax, eax
		243	jz .dump
		244
		245	cmp [eax + SOCKET.Domain], AF_INET4
		246	jne .next_socket
		247
		248	cmp [eax + SOCKET.Protocol], IP_PROTO_ICMP
		249	jne .next_socket
		250
		251	cmp [eax + IP_SOCKET.RemoteIP], esi
		252	jne .next_socket
		253
		254	; cmp [eax + ICMP_SOCKET.Identifier],
		255	; jne .next_socket
		256
		257	; call IPv4_dest_to_dev
		258	; cmp edi,-1
		259	; je .dump
		260	; inc [ICMP_PACKETS_RX+edi]
		261
3556	hidnplayr	262	DEBUGF DEBUG_NETWORK_VERBOSE, "socket=%x\n", eax
3545	hidnplayr	263
		264	pusha
		265	lea ecx, [eax + SOCKET.mutex]
		266	call mutex_lock
		267	popa
		268
		269	mov esi, edx
		270	jmp SOCKET_input
		271
		272
		273	.checksum_mismatch:
3556	hidnplayr	274	DEBUGF DEBUG_NETWORK_VERBOSE, "checksum mismatch\n"
3545	hidnplayr	275
		276	.dump:
3556	hidnplayr	277	DEBUGF DEBUG_NETWORK_VERBOSE, "ICMP_input: dumping\n"
3545	hidnplayr	278
		279	call kernel_free
		280	add esp, 4 ; pop (balance stack)
		281
		282	ret
		283
		284
		285	;-----------------------------------------------------------------
		286	;
		287	; ICMP_output
		288	;
		289	; IN: eax = dest ip
		290	; ebx = source ip
		291	; ecx = data length
		292	; dh = type
		293	; dl = code
		294	; esi = data offset
		295	; edi = identifier shl 16 + sequence number
		296	;
		297	;-----------------------------------------------------------------
		298	align 4
		299	ICMP_output:
		300
3556	hidnplayr	301	DEBUGF DEBUG_NETWORK_VERBOSE, "Creating ICMP Packet\n"
3545	hidnplayr	302
		303	push esi edi dx
		304
		305	mov edx, [eax + IP_SOCKET.LocalIP]
		306	mov eax, [eax + IP_SOCKET.RemoteIP]
		307	add ecx, sizeof.ICMP_header
		308	mov di, IP_PROTO_ICMP SHL 8 + 128 ; TTL
		309	call IPv4_output
		310	jz .exit
		311
3556	hidnplayr	312	DEBUGF DEBUG_NETWORK_VERBOSE, "full icmp packet size: %u\n", edx
3545	hidnplayr	313
		314	pop word [edi + ICMP_header.Type] ; Write both type and code bytes at once
		315	pop dword [edi + ICMP_header.Identifier] ; identifier and sequence number
		316	mov [edi + ICMP_header.Checksum], 0
		317
		318	push ebx ecx edx
		319	mov esi, edi
		320	xor edx, edx
		321	call checksum_1
		322	call checksum_2
		323	mov [edi + ICMP_header.Checksum], dx
		324	pop edx ecx ebx esi
		325
		326	sub ecx, sizeof.ICMP_header
		327	add edi, sizeof.ICMP_header
		328	push cx
		329	shr cx, 2
		330	rep movsd
		331	pop cx
		332	and cx, 3
		333	rep movsb
		334
		335	sub edi, edx ;;; TODO: find a better way to remember start of packet
		336	push edx edi
3556	hidnplayr	337	DEBUGF DEBUG_NETWORK_VERBOSE, "Sending ICMP Packet\n"
3545	hidnplayr	338	call [ebx + NET_DEVICE.transmit]
		339	ret
		340	.exit:
3556	hidnplayr	341	DEBUGF DEBUG_NETWORK_ERROR, "Creating ICMP Packet failed\n"
3545	hidnplayr	342	add esp, 2*4 + 2
		343	ret
		344
		345
		346
		347
		348	;-----------------------------------------------------------------
		349	;
		350	; ICMP_output
		351	;
		352	; IN: eax = socket ptr
		353	; ecx = data length
		354	; esi = data offset
		355	;
		356	;-----------------------------------------------------------------
		357	align 4
		358	ICMP_output_raw:
		359
3556	hidnplayr	360	DEBUGF DEBUG_NETWORK_VERBOSE, "Creating ICMP Packet for socket %x, data ptr=%x\n", eax, edx
3545	hidnplayr	361
		362	push edx
		363
		364	mov di, IP_PROTO_ICMP SHL 8 + 128 ; TTL
		365	mov edx, [eax + IP_SOCKET.LocalIP]
		366	mov eax, [eax + IP_SOCKET.RemoteIP]
		367	call IPv4_output
		368	jz .exit
		369
		370	pop esi
		371	push edx
		372	push eax
		373
		374	push edi ecx
3556	hidnplayr	375	DEBUGF DEBUG_NETWORK_VERBOSE, "copying %u bytes from %x to %x\n", ecx, esi, edi
3545	hidnplayr	376	rep movsb
		377	pop ecx edi
		378
		379	mov [edi + ICMP_header.Checksum], 0
		380
		381	mov esi, edi
		382	xor edx, edx
		383	call checksum_1
		384	call checksum_2
		385	mov [edi + ICMP_header.Checksum], dx
		386
3556	hidnplayr	387	DEBUGF DEBUG_NETWORK_VERBOSE, "Sending ICMP Packet\n"
3545	hidnplayr	388	call [ebx + NET_DEVICE.transmit]
		389	ret
		390	.exit:
3556	hidnplayr	391	DEBUGF DEBUG_NETWORK_ERROR, "Creating ICMP Packet failed\n"
3545	hidnplayr	392	add esp, 4
		393	ret
		394
		395
		396
		397
		398	;-----------------------------------------------------------------
		399	;
		400	; ICMP_API
		401	;
		402	; This function is called by system function 75
		403	;
		404	; IN: subfunction number in bl
		405	; device number in bh
		406	; ecx, edx, .. depends on subfunction
		407	;
		408	; OUT:
		409	;
		410	;-----------------------------------------------------------------
		411	align 4
		412	ICMP_api:
		413
		414	movzx eax, bh
		415	shl eax, 2
		416
		417	test bl, bl
		418	jz .packets_tx ; 0
		419	dec bl
		420	jz .packets_rx ; 1
		421
		422	.error:
		423	mov eax, -1
		424	ret
		425
		426	.packets_tx:
		427	mov eax, [ICMP_PACKETS_TX + eax]
		428	ret
		429
		430	.packets_rx:
		431	mov eax, [ICMP_PACKETS_RX + eax]
		432	ret

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(root)/kernel/trunk/network/icmp.inc – Rev 3601