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

Rev	Author	Line No.	Line
3545	hidnplayr	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
5363	yogev_ezra	3	;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;;
3545	hidnplayr	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
4850	mario79	19	$Revision: 6011 $
3545	hidnplayr	20
		21	; ICMP types & codes
		22
6011	hidnplayr	23	ICMP_ECHOREPLY = 0 ; echo reply message
3545	hidnplayr	24
		25	ICMP_UNREACH = 3
6011	hidnplayr	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
		40	ICMP_UNREACH_HOST_PRECEDENCE = 14 ; host prec vio.
		41	ICMP_UNREACH_PRECEDENCE_CUTOFF = 15 ; prec cutoff
3545	hidnplayr	42
6011	hidnplayr	43	ICMP_SOURCEQUENCH = 4 ; Packet lost, slow down
3545	hidnplayr	44
6011	hidnplayr	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
3545	hidnplayr	50
6011	hidnplayr	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
3545	hidnplayr	56
6011	hidnplayr	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
3545	hidnplayr	61
6011	hidnplayr	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
3545	hidnplayr	66
6011	hidnplayr	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
3545	hidnplayr	81
6011	hidnplayr	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
3545	hidnplayr	86
		87
		88	struct ICMP_header
		89
		90	Type db ?
		91	Code db ?
		92	Checksum dw ?
		93	Identifier dw ?
		94	SequenceNumber dw ?
		95
		96	ends
		97
		98
3698	hidnplayr	99	uglobal
3545	hidnplayr	100	align 4
3698	hidnplayr	101
3600	hidnplayr	102	ICMP_PACKETS_TX rd NET_DEVICES_MAX
		103	ICMP_PACKETS_RX rd NET_DEVICES_MAX
3698	hidnplayr	104
3545	hidnplayr	105	endg
		106
		107
		108
6011	hidnplayr	109	;-----------------------------------------------------------------;
		110	; ;
		111	; ICMP_init ;
		112	; ;
		113	;-----------------------------------------------------------------;
3545	hidnplayr	114
6011	hidnplayr	115	macro icmp_init {
3545	hidnplayr	116
		117	xor eax, eax
		118	mov edi, ICMP_PACKETS_TX
3600	hidnplayr	119	mov ecx, 2*NET_DEVICES_MAX
3711	clevermous	120	rep stosd
3545	hidnplayr	121
		122	}
		123
		124
6011	hidnplayr	125	;-----------------------------------------------------------------;
		126	; ;
		127	; icmp_input: Send a reply's to an ICMP echo or insert packets ;
		128	; into socket. ;
		129	; ;
		130	; IN: [esp] = ptr to buffer ;
		131	; ebx = ptr to device struct ;
		132	; ecx = ICMP Packet size ;
		133	; edx = ptr to IPv4 header ;
		134	; esi = ptr to ICMP Packet data ;
		135	; edi = interface number*4 ;
		136	; ;
		137	; OUT: / ;
		138	; ;
		139	;-----------------------------------------------------------------;
3545	hidnplayr	140	align 4
6011	hidnplayr	141	icmp_input:
3545	hidnplayr	142
5522	hidnplayr	143	DEBUGF DEBUG_NETWORK_VERBOSE, "ICMP_input\n"
3545	hidnplayr	144
5842	hidnplayr	145	; Dump all multicasts and broadcasts
		146	mov eax, [IP_LIST + edi]
		147	cmp eax, [edx + IPv4_header.DestinationAddress]
		148	jne .dump
		149
5522	hidnplayr	150	; Check the checksum
5842	hidnplayr	151	push esi ecx edx
3545	hidnplayr	152	push [esi + ICMP_header.Checksum]
		153	mov [esi + ICMP_header.Checksum], 0
		154	xor edx, edx
		155	call checksum_1
		156	call checksum_2
		157	pop si
		158	cmp dx, si
5842	hidnplayr	159	pop edx ecx esi
3545	hidnplayr	160	jne .checksum_mismatch
		161
5522	hidnplayr	162	DEBUGF DEBUG_NETWORK_VERBOSE, "ICMP_input: Checksum OK\n"
3643	hidnplayr	163
5522	hidnplayr	164	; Update stats
3643	hidnplayr	165	inc [ICMP_PACKETS_RX + edi]
		166
5522	hidnplayr	167	; Is this an echo request?
		168	cmp [esi + ICMP_header.Type], ICMP_ECHO
		169	je .echo_request
3545	hidnplayr	170
5522	hidnplayr	171	; Look for an open ICMP socket
3647	hidnplayr	172	pusha
		173	mov ecx, socket_mutex
		174	call mutex_lock
		175	popa
		176
5842	hidnplayr	177	add ecx, esi
		178	sub ecx, edx
		179	mov esi, edx
3545	hidnplayr	180	mov eax, net_sockets
		181	.next_socket:
		182	mov eax, [eax + SOCKET.NextPtr]
		183	or eax, eax
3647	hidnplayr	184	jz .dump_
3545	hidnplayr	185
		186	cmp [eax + SOCKET.Domain], AF_INET4
		187	jne .next_socket
		188
		189	cmp [eax + SOCKET.Protocol], IP_PROTO_ICMP
		190	jne .next_socket
		191
3647	hidnplayr	192	pusha
		193	mov ecx, socket_mutex
		194	call mutex_unlock
		195	popa
		196
3556	hidnplayr	197	DEBUGF DEBUG_NETWORK_VERBOSE, "socket=%x\n", eax
3545	hidnplayr	198
		199	pusha
		200	lea ecx, [eax + SOCKET.mutex]
		201	call mutex_lock
		202	popa
		203
6011	hidnplayr	204	jmp socket_input
3545	hidnplayr	205
5522	hidnplayr	206
		207
		208	.echo_request:
		209
		210	; We'll reuse the packet so we can create the response as fast as possible
		211	DEBUGF DEBUG_NETWORK_VERBOSE, "ICMP echo request\n"
		212
		213	; Change Packet type to reply
		214	mov [esi + ICMP_header.Type], ICMP_ECHOREPLY
		215
		216	mov eax, [esp]
		217	lea esi, [eax + NET_BUFF.data]
		218
		219	; Check frame type
		220	cmp [eax + NET_BUFF.type], NET_BUFF_ETH
		221	jne .not_ethernet
		222
		223	; exchange dest and source MAC in ETH header
		224	push dword [esi + ETH_header.DstMAC]
		225	push dword [esi + ETH_header.SrcMAC]
		226	pop dword [esi + ETH_header.DstMAC]
		227	pop dword [esi + ETH_header.SrcMAC]
		228	push word [esi + ETH_header.DstMAC + 4]
		229	push word [esi + ETH_header.SrcMAC + 4]
		230	pop word [esi + ETH_header.DstMAC + 4]
		231	pop word [esi + ETH_header.SrcMAC + 4]
		232	add esi, sizeof.ETH_header
		233
		234	.not_ethernet:
		235	; Exchange dest and source address in IP header
		236	push [esi + IPv4_header.SourceAddress]
		237	push [esi + IPv4_header.DestinationAddress]
		238	pop [esi + IPv4_header.SourceAddress]
		239	pop [esi + IPv4_header.DestinationAddress]
		240
		241	; Calculate IP header length
		242	movzx ecx, [esi + IPv4_header.VersionAndIHL]
		243	and ecx, 0x0f
		244	shl cx, 2
		245	mov edi, ecx ; put it in edi for later
		246
		247	; Calculate IP checksum
		248	mov eax, esi
		249	mov [eax + IPv4_header.HeaderChecksum], 0
		250	xor edx, edx
		251	call checksum_1
		252	call checksum_2
		253	mov [eax + IPv4_header.HeaderChecksum], dx
		254
		255	; Calculate ICMP packet length
		256	movzx ecx, [eax + IPv4_header.TotalLength]
		257	xchg ch, cl
		258	sub ecx, edi ; IP packet length - IP header length = ICMP packet length
		259
		260	; Calculate ICMP checkSum
		261	mov eax, esi
		262	mov [esi + ICMP_header.Checksum], 0
		263	xor edx, edx
		264	call checksum_1
		265	call checksum_2
		266	mov [eax + ICMP_header.Checksum], dx
		267
		268	; Transmit the frame
		269	DEBUGF DEBUG_NETWORK_VERBOSE, "ICMP transmitting reply\n"
		270	call [ebx + NET_DEVICE.transmit]
		271	test eax, eax
		272	jnz @f
		273	DEBUGF DEBUG_NETWORK_VERBOSE, "ICMP transmit failed\n"
6011	hidnplayr	274	call net_ptr_to_num4
5522	hidnplayr	275	inc [ICMP_PACKETS_TX + edi]
		276	@@:
		277	ret
		278
3647	hidnplayr	279	.dump_:
		280	pusha
		281	mov ecx, socket_mutex
		282	call mutex_unlock
		283	popa
		284
4892	hidnplayr	285	DEBUGF DEBUG_NETWORK_ERROR, "ICMP_input: no socket found\n"
3647	hidnplayr	286	jmp .dump
		287
3545	hidnplayr	288	.checksum_mismatch:
4892	hidnplayr	289	DEBUGF DEBUG_NETWORK_ERROR, "ICMP_input: checksum mismatch\n"
3545	hidnplayr	290
		291	.dump:
3556	hidnplayr	292	DEBUGF DEBUG_NETWORK_VERBOSE, "ICMP_input: dumping\n"
6011	hidnplayr	293	call net_buff_free
3545	hidnplayr	294	ret
		295
		296
4052	hidnplayr	297	if 0
6011	hidnplayr	298	;-----------------------------------------------------------------;
		299	; ;
		300	; icmp_output ;
		301	; ;
		302	; IN: eax = dest ip ;
		303	; bh = type ;
		304	; bl = code ;
		305	; ecx = data length ;
		306	; edx = source ip ;
		307	; esi = data offset ;
		308	; edi = identifier shl 16 + sequence number ;
		309	; ;
		310	;-----------------------------------------------------------------;
3545	hidnplayr	311	align 4
6011	hidnplayr	312	icmp_output:
3545	hidnplayr	313
3556	hidnplayr	314	DEBUGF DEBUG_NETWORK_VERBOSE, "Creating ICMP Packet\n"
3545	hidnplayr	315
4052	hidnplayr	316	push esi edi bx
3545	hidnplayr	317	add ecx, sizeof.ICMP_header
		318	mov di, IP_PROTO_ICMP SHL 8 + 128 ; TTL
		319	call IPv4_output
		320	jz .exit
		321
3556	hidnplayr	322	DEBUGF DEBUG_NETWORK_VERBOSE, "full icmp packet size: %u\n", edx
3545	hidnplayr	323
		324	pop word [edi + ICMP_header.Type] ; Write both type and code bytes at once
		325	pop dword [edi + ICMP_header.Identifier] ; identifier and sequence number
		326	mov [edi + ICMP_header.Checksum], 0
		327
		328	push ebx ecx edx
		329	mov esi, edi
		330	xor edx, edx
		331	call checksum_1
		332	call checksum_2
		333	mov [edi + ICMP_header.Checksum], dx
		334	pop edx ecx ebx esi
		335
		336	sub ecx, sizeof.ICMP_header
		337	add edi, sizeof.ICMP_header
		338	push cx
		339	shr cx, 2
3711	clevermous	340	rep movsd
3545	hidnplayr	341	pop cx
		342	and cx, 3
3711	clevermous	343	rep movsb
3545	hidnplayr	344
		345	sub edi, edx ;;; TODO: find a better way to remember start of packet
		346	push edx edi
3556	hidnplayr	347	DEBUGF DEBUG_NETWORK_VERBOSE, "Sending ICMP Packet\n"
3545	hidnplayr	348	call [ebx + NET_DEVICE.transmit]
3643	hidnplayr	349	test eax, eax
		350	jnz @f
		351	call NET_ptr_to_num4
		352	inc [ICMP_PACKETS_TX + edi]
		353	@@:
3545	hidnplayr	354	ret
		355	.exit:
3556	hidnplayr	356	DEBUGF DEBUG_NETWORK_ERROR, "Creating ICMP Packet failed\n"
3545	hidnplayr	357	add esp, 2*4 + 2
		358	ret
4052	hidnplayr	359	end if
3545	hidnplayr	360
		361
		362
		363
6011	hidnplayr	364	;-----------------------------------------------------------------;
		365	; ;
		366	; icmp_output_raw ;
		367	; ;
		368	; IN: eax = socket ptr ;
		369	; ecx = data length ;
		370	; edx = data pointer ;
		371	; ;
		372	;-----------------------------------------------------------------;
3545	hidnplayr	373	align 4
6011	hidnplayr	374	icmp_output_raw:
3545	hidnplayr	375
3556	hidnplayr	376	DEBUGF DEBUG_NETWORK_VERBOSE, "Creating ICMP Packet for socket %x, data ptr=%x\n", eax, edx
3545	hidnplayr	377
		378	push edx
5842	hidnplayr	379	mov ebx, [eax + IP_SOCKET.device]
3545	hidnplayr	380	mov edx, [eax + IP_SOCKET.LocalIP]
5842	hidnplayr	381	mov edi, [eax + IP_SOCKET.RemoteIP]
		382	mov al, [eax + IP_SOCKET.ttl]
		383	mov ah, IP_PROTO_ICMP
6011	hidnplayr	384	call ipv4_output
5842	hidnplayr	385	jz .fail
3545	hidnplayr	386
		387	pop esi
		388	push eax
		389
		390	push edi ecx
3556	hidnplayr	391	DEBUGF DEBUG_NETWORK_VERBOSE, "copying %u bytes from %x to %x\n", ecx, esi, edi
3711	clevermous	392	rep movsb
3545	hidnplayr	393	pop ecx edi
		394
		395	mov [edi + ICMP_header.Checksum], 0
		396
		397	mov esi, edi
		398	xor edx, edx
		399	call checksum_1
		400	call checksum_2
		401	mov [edi + ICMP_header.Checksum], dx
		402
3556	hidnplayr	403	DEBUGF DEBUG_NETWORK_VERBOSE, "Sending ICMP Packet\n"
3545	hidnplayr	404	call [ebx + NET_DEVICE.transmit]
3643	hidnplayr	405	test eax, eax
		406	jnz @f
6011	hidnplayr	407	call net_ptr_to_num4
3643	hidnplayr	408	inc [ICMP_PACKETS_TX + edi]
5842	hidnplayr	409	@@:
3545	hidnplayr	410	ret
5842	hidnplayr	411
		412	.fail:
		413	pop edx
3556	hidnplayr	414	DEBUGF DEBUG_NETWORK_ERROR, "Creating ICMP Packet failed\n"
5842	hidnplayr	415	or eax, -1
		416	mov ebx, EMSGSIZE ;;; FIXME
3545	hidnplayr	417	ret
		418
		419
		420
		421
6011	hidnplayr	422	;-----------------------------------------------------------------;
		423	; ;
		424	; icmp_api: Part of system function 76. ;
		425	; ;
		426	; IN: bl = subfunction number ;
		427	; bh = device number ;
		428	; ecx, edx, .. depends on subfunction ;
		429	; ;
		430	; OUT: depends on subfunction ;
		431	; ;
		432	;-----------------------------------------------------------------;
3545	hidnplayr	433	align 4
6011	hidnplayr	434	icmp_api:
3545	hidnplayr	435
		436	movzx eax, bh
		437	shl eax, 2
		438
		439	test bl, bl
		440	jz .packets_tx ; 0
		441	dec bl
		442	jz .packets_rx ; 1
		443
		444	.error:
		445	mov eax, -1
		446	ret
		447
		448	.packets_tx:
		449	mov eax, [ICMP_PACKETS_TX + eax]
		450	ret
		451
		452	.packets_rx:
		453	mov eax, [ICMP_PACKETS_RX + eax]
		454	ret

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(root)/kernel/trunk/network/icmp.inc @ 7535 – Rev 6011