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

Rev	Author	Line No.	Line
3545	hidnplayr	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
		3	;; Copyright (C) KolibriOS team 2004-2013. All rights reserved. ;;
		4	;; Distributed under terms of the GNU General Public License ;;
		5	;; ;;
		6	;; Part of the TCP/IP network stack for KolibriOS ;;
		7	;; ;;
		8	;; Written by hidnplayr@kolibrios.org ;;
		9	;; ;;
		10	;; Based on the code of 4.4BSD ;;
		11	;; ;;
		12	;; GNU GENERAL PUBLIC LICENSE ;;
		13	;; Version 2, June 1991 ;;
		14	;; ;;
		15	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		16
4850	mario79	17	$Revision: 4850 $
3545	hidnplayr	18
		19	; Socket states
		20	TCPS_CLOSED = 0
		21	TCPS_LISTEN = 1
		22	TCPS_SYN_SENT = 2
		23	TCPS_SYN_RECEIVED = 3
		24	TCPS_ESTABLISHED = 4
		25	TCPS_CLOSE_WAIT = 5
		26	TCPS_FIN_WAIT_1 = 6
		27	TCPS_CLOSING = 7
		28	TCPS_LAST_ACK = 8
		29	TCPS_FIN_WAIT_2 = 9
		30	TCPS_TIMED_WAIT = 10
		31
		32	; Socket Flags
		33	TF_ACKNOW = 1 shl 0 ; ack peer immediately
		34	TF_DELACK = 1 shl 1 ; ack, but try to delay it
		35	TF_NODELAY = 1 shl 2 ; don't delay packets to coalesce
		36	TF_NOOPT = 1 shl 3 ; don't use tcp options
		37	TF_SENTFIN = 1 shl 4 ; have sent FIN
		38	TF_REQ_SCALE = 1 shl 5 ; have/will request window scaling
		39	TF_RCVD_SCALE = 1 shl 6 ; other side has requested scaling
		40	TF_REQ_TSTMP = 1 shl 7 ; have/will request timestamps
		41	TF_RCVD_TSTMP = 1 shl 8 ; a timestamp was received in SYN
		42	TF_SACK_PERMIT = 1 shl 9 ; other side said I could SACK
		43
		44	; Segment flags
		45	TH_FIN = 1 shl 0
		46	TH_SYN = 1 shl 1
		47	TH_RST = 1 shl 2
		48	TH_PUSH = 1 shl 3
		49	TH_ACK = 1 shl 4
		50	TH_URG = 1 shl 5
		51
		52	; Segment header options
		53	TCP_OPT_EOL = 0 ; End of option list.
		54	TCP_OPT_NOP = 1 ; No-Operation.
		55	TCP_OPT_MAXSEG = 2 ; Maximum Segment Size.
		56	TCP_OPT_WINDOW = 3 ; window scale
		57	TCP_OPT_SACK_PERMIT = 4 ; Selective Acknowledgement
		58	TCP_OPT_SACK = 5
		59	TCP_OPT_TIMESTAMP = 8
		60
		61	; Fundamental timer values
		62	TCP_time_MSL = 47 ; max segment lifetime (30s)
		63	TCP_time_re_min = 2 ; min retransmission (1,28s)
		64	TCP_time_re_max = 100 ; max retransmission (64s)
		65	TCP_time_pers_min = 8 ; min persist (5,12s)
		66	TCP_time_pers_max = 94 ; max persist (60,16s)
		67	TCP_time_keep_init = 118 ; connection establishment (75,52s)
		68	TCP_time_keep_idle = 4608 ; idle time before 1st probe (2h)
		69	TCP_time_keep_interval = 118 ; between probes when no response (75,52s)
		70	TCP_time_rtt_default = 5 ; default Round Trip Time (3,2s)
		71	TCP_time_srtt_default = 0 ;
		72	TCP_time_max_idle = 8*TCP_time_keep_interval ; FIXME
		73
4030	hidnplayr	74	TCP_time_connect = 300 ; in 1/100s (default=3s)
		75
3545	hidnplayr	76	; timer constants
		77	TCP_max_rxtshift = 12 ; max retransmissions waiting for ACK
		78	TCP_max_keepcnt = 8 ; max keepalive probes
		79
		80	;
		81	TCP_max_winshift = 14
		82	TCP_max_win = 65535
		83
		84	TCP_re_xmit_thresh = 3
		85
		86	TCP_mss_default = 1480 ; default max segment size
		87
		88	; smoothed round trip time and estimated variance are stored as fixed point numbers,
		89	; shifted by the value below.
		90	; With these scales, srtt has 3 bits to the right of the binary point, and thus an "alpha"
		91	; of .875. rttvar has 2 bits to the right and thus "alpha" of 0.75
		92	TCP_RTT_SHIFT = 3
		93	TCP_RTTVAR_SHIFT = 2
		94
		95	; bits used by tcp_input and tcp_output
		96	TCP_BIT_NEEDOUTPUT = 1 shl 0
		97	TCP_BIT_TIMESTAMP = 1 shl 1
		98	TCP_BIT_DROPSOCKET = 1 shl 2
		99
		100	TCP_BIT_SENDALOT = 1 shl 0
		101
		102	TCP_PAWS_IDLE = 24246060100 ; 24 days, in 1/100 seconds
		103
		104	TCP_QUEUE_SIZE = 50
		105
		106	struct TCP_header
		107
		108	SourcePort dw ?
		109	DestinationPort dw ?
		110	SequenceNumber dd ?
		111	AckNumber dd ?
		112	DataOffset db ? ; DataOffset[0-3 bits] and Reserved[4-7]
		113	Flags db ? ; Reserved[0-1 bits]\|URG\|ACK\|PSH\|RST\|SYN\|FIN
		114	Window dw ?
		115	Checksum dw ?
		116	UrgentPointer dw ?
		117
		118	ends
		119
		120	struct TCP_queue_entry
		121
		122	ip_ptr dd ?
		123	segment_ptr dd ?
		124	segment_size dd ?
		125	device_ptr dd ?
		126
		127	buffer_ptr dd ?
		128	timestamp dd ?
		129
		130	ends
		131
3697	hidnplayr	132	uglobal
3545	hidnplayr	133	align 4
3697	hidnplayr	134
3600	hidnplayr	135	TCP_segments_tx rd NET_DEVICES_MAX
		136	TCP_segments_rx rd NET_DEVICES_MAX
		137	TCP_segments_missed rd NET_DEVICES_MAX
		138	TCP_segments_dumped rd NET_DEVICES_MAX
		139	; TCP_bytes_rx rq NET_DEVICES_MAX
		140	; TCP_bytes_tx rq NET_DEVICES_MAX
3545	hidnplayr	141	TCP_sequence_num dd ?
3697	hidnplayr	142	TCP_queue rd (TCP_QUEUE_SIZE*sizeof.TCP_queue_entry + sizeof.queue)/4
3545	hidnplayr	143	TCP_input_event dd ?
		144	endg
		145
4387	hidnplayr	146	uglobal
		147	align 4
3545	hidnplayr	148
4387	hidnplayr	149	TCPS_accepts dd ? ; #SYNs received in LISTEN state
		150	TCPS_closed dd ? ; #connections closed (includes drops)
		151	TCPS_connattempt dd ? ; #connections initiated (calls to connect)
		152	TCPS_conndrops dd ? ; #embryonic connections dropped (before SYN received)
		153	TCPS_connects dd ? ; #connections established actively or passively
		154	TCPS_delack dd ? ; #delayed ACKs sent
		155	TCPS_drops dd ? ; #connections dropped (after SYN received)
		156	TCPS_keepdrops dd ? ; #connections dropped in keepalive (established or awaiting SYN)
		157	TCPS_keepprobe dd ? ; #keepalive probes sent
		158	TCPS_keeptimeo dd ? ; #times keepalive timer or connections-establishment timer expire
		159	TCPS_pawsdrop dd ? ; #segments dropped due to PAWS
		160	TCPS_pcbcachemiss dd ? ; #times PCB cache comparison fails
		161	TCPS_persisttimeo dd ? ; #times persist timer expires
		162	TCPS_predack dd ? ; #times header prediction correct for ACKs
		163	TCPS_preddat dd ? ; #times header prediction correct for data packets
		164	TCPS_rcvackbyte dd ? ; #bytes ACKed by received ACKs
		165	TCPS_rcvackpack dd ? ; #received ACK packets
		166	TCPS_rcvacktoomuch dd ? ; #received ACKs for unsent data
		167	TCPS_rcvafterclose dd ? ; #packets received after connection closed
		168	TCPS_rcvbadoff dd ? ; #packets received with invalid header length
		169	TCPS_rcvbadsum dd ? ; #packets received with checksum errors
		170	TCPS_rcvbyte dd ? ; #bytes received in sequence
		171	TCPS_rcvbyteafterwin dd ? ; #bytes received beyond advertised window
		172	TCPS_rcvdupack dd ? ; #duplicate ACKs received
		173	TCPS_rcvdupbyte dd ? ; #bytes receivedin completely duplicate packets
		174	TCPS_rcvduppack dd ? ; #packets received with completely duplicate bytes
		175	TCPS_rcvoobyte dd ? ; #out-of-order bytes received
		176	TCPS_rcvoopack dd ? ; #out-of-order packets received
		177	TCPS_rcvpack dd ? ; #packets received in sequence
		178	TCPS_rcvpackafterwin dd ? ; #packets with some data beyond advertised window
		179	TCPS_rcvpartdupbyte dd ? ; #duplicate bytes in part-duplicate packets
		180	TCPS_rcvpartduppack dd ? ; #packets with some duplicate data
		181	TCPS_rcvshort dd ? ; #packets received too short
		182	TCPS_rcvtotal dd ? ; #total packets received
		183	TCPS_rcvwinprobe dd ? ; #window probe packets received
		184	TCPS_rcvwinupd dd ? ; #received window update packets
		185	TCPS_rexmttimeo dd ? ; #retransmission timeouts
		186	TCPS_rttupdated dd ? ; #times RTT estimators updated
		187	TCPS_segstimed dd ? ; #segments for which TCP tried to measure RTT
		188	TCPS_sndacks dd ? ; #ACK-only packets sent (data length = 0)
		189	TCPS_sndbyte dd ? ; #data bytes sent
		190	TCPS_sndctrl dd ? ; #control (SYN, FIN, RST) packets sent (data length = 0)
		191	TCPS_sndpack dd ? ; #data packets sent (data length > 0)
		192	TCPS_sndprobe dd ? ; #window probes sent (1 byte of data forced by persist timer)
		193	TCPS_sndrexmitbyte dd ? ; #data bytes retransmitted
		194	TCPS_sndrexmitpack dd ? ; #data packets retransmitted
		195	TCPS_sndtotal dd ? ; total #packets sent
		196	TCPS_sndurg dd ? ; #packets sent with URG-only (data length=0)
		197	TCPS_sndwinup dd ? ; #window update-only packets sent (data length=0)
		198	TCPS_timeoutdrop dd ? ; #connections dropped in retransmission timeout
		199
		200	endg
		201
		202
3545	hidnplayr	203	;-----------------------------------------------------------------
		204	;
		205	; TCP_init
		206	;
		207	; This function resets all TCP variables
		208	;
		209	;-----------------------------------------------------------------
		210	macro TCP_init {
		211
		212	xor eax, eax
		213	mov edi, TCP_segments_tx
3600	hidnplayr	214	mov ecx, (6*NET_DEVICES_MAX)
3711	clevermous	215	rep stosd
3545	hidnplayr	216
		217	pseudo_random eax
		218	mov [TCP_sequence_num], eax
		219
		220	init_queue TCP_queue
		221
3598	clevermous	222	movi ebx, 1
3545	hidnplayr	223	mov ecx, TCP_process_input
		224	call new_sys_threads
3697	hidnplayr	225	test eax, eax
		226	jns @f
		227	DEBUGF DEBUG_NETWORK_ERROR,'K : cannot create kernel thread for TCP, error %d\n', eax
		228	@@:
3545	hidnplayr	229
		230	}
		231
		232
		233	include 'tcp_timer.inc'
		234	include 'tcp_subr.inc'
		235	include 'tcp_usreq.inc'
		236	include 'tcp_input.inc'
		237	include 'tcp_output.inc'
		238
		239
		240	;---------------------------------------------------------------------------
		241	;
		242	; TCP_API
		243	;
		244	; This function is called by system function 76
		245	;
		246	; IN: subfunction number in bl
		247	; device number in bh
		248	; ecx, edx, .. depends on subfunction
		249	;
		250	; OUT:
		251	;
		252	;---------------------------------------------------------------------------
		253	align 4
		254	TCP_api:
		255
		256	movzx eax, bh
		257	shl eax, 2
		258
		259	test bl, bl
		260	jz .packets_tx ; 0
		261	dec bl
		262	jz .packets_rx ; 1
		263	dec bl
		264	jz .packets_missed ; 2
		265	dec bl
		266	jz .packets_dumped ; 3
		267
		268	.error:
		269	mov eax, -1
		270	ret
		271
		272	.packets_tx:
		273	mov eax, [TCP_segments_tx + eax]
		274	ret
		275
		276	.packets_rx:
		277	mov eax, [TCP_segments_rx + eax]
		278	ret
		279
		280	.packets_missed:
		281	mov eax, [TCP_segments_missed + eax]
		282	ret
		283
		284	.packets_dumped:
		285	mov eax, [TCP_segments_dumped + eax]
		286	ret

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(root)/kernel/trunk/network/tcp.inc – Rev 4850