287 lines
11 KiB
PHP
287 lines
11 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; ;;
|
|
;; Copyright (C) KolibriOS team 2004-2013. All rights reserved. ;;
|
|
;; Distributed under terms of the GNU General Public License ;;
|
|
;; ;;
|
|
;; Part of the TCP/IP network stack for KolibriOS ;;
|
|
;; ;;
|
|
;; Written by hidnplayr@kolibrios.org ;;
|
|
;; ;;
|
|
;; Based on the code of 4.4BSD ;;
|
|
;; ;;
|
|
;; GNU GENERAL PUBLIC LICENSE ;;
|
|
;; Version 2, June 1991 ;;
|
|
;; ;;
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
$Revision: 3406 $
|
|
|
|
; Socket states
|
|
TCPS_CLOSED = 0
|
|
TCPS_LISTEN = 1
|
|
TCPS_SYN_SENT = 2
|
|
TCPS_SYN_RECEIVED = 3
|
|
TCPS_ESTABLISHED = 4
|
|
TCPS_CLOSE_WAIT = 5
|
|
TCPS_FIN_WAIT_1 = 6
|
|
TCPS_CLOSING = 7
|
|
TCPS_LAST_ACK = 8
|
|
TCPS_FIN_WAIT_2 = 9
|
|
TCPS_TIMED_WAIT = 10
|
|
|
|
; Socket Flags
|
|
TF_ACKNOW = 1 shl 0 ; ack peer immediately
|
|
TF_DELACK = 1 shl 1 ; ack, but try to delay it
|
|
TF_NODELAY = 1 shl 2 ; don't delay packets to coalesce
|
|
TF_NOOPT = 1 shl 3 ; don't use tcp options
|
|
TF_SENTFIN = 1 shl 4 ; have sent FIN
|
|
TF_REQ_SCALE = 1 shl 5 ; have/will request window scaling
|
|
TF_RCVD_SCALE = 1 shl 6 ; other side has requested scaling
|
|
TF_REQ_TSTMP = 1 shl 7 ; have/will request timestamps
|
|
TF_RCVD_TSTMP = 1 shl 8 ; a timestamp was received in SYN
|
|
TF_SACK_PERMIT = 1 shl 9 ; other side said I could SACK
|
|
|
|
; Segment flags
|
|
TH_FIN = 1 shl 0
|
|
TH_SYN = 1 shl 1
|
|
TH_RST = 1 shl 2
|
|
TH_PUSH = 1 shl 3
|
|
TH_ACK = 1 shl 4
|
|
TH_URG = 1 shl 5
|
|
|
|
; Segment header options
|
|
TCP_OPT_EOL = 0 ; End of option list.
|
|
TCP_OPT_NOP = 1 ; No-Operation.
|
|
TCP_OPT_MAXSEG = 2 ; Maximum Segment Size.
|
|
TCP_OPT_WINDOW = 3 ; window scale
|
|
TCP_OPT_SACK_PERMIT = 4 ; Selective Acknowledgement
|
|
TCP_OPT_SACK = 5
|
|
TCP_OPT_TIMESTAMP = 8
|
|
|
|
; Fundamental timer values
|
|
TCP_time_MSL = 47 ; max segment lifetime (30s)
|
|
TCP_time_re_min = 2 ; min retransmission (1,28s)
|
|
TCP_time_re_max = 100 ; max retransmission (64s)
|
|
TCP_time_pers_min = 8 ; min persist (5,12s)
|
|
TCP_time_pers_max = 94 ; max persist (60,16s)
|
|
TCP_time_keep_init = 118 ; connection establishment (75,52s)
|
|
TCP_time_keep_idle = 4608 ; idle time before 1st probe (2h)
|
|
TCP_time_keep_interval = 118 ; between probes when no response (75,52s)
|
|
TCP_time_rtt_default = 5 ; default Round Trip Time (3,2s)
|
|
TCP_time_srtt_default = 0 ;
|
|
TCP_time_max_idle = 8*TCP_time_keep_interval ; FIXME
|
|
|
|
TCP_time_connect = 300 ; in 1/100s (default=3s)
|
|
|
|
; timer constants
|
|
TCP_max_rxtshift = 12 ; max retransmissions waiting for ACK
|
|
TCP_max_keepcnt = 8 ; max keepalive probes
|
|
|
|
;
|
|
TCP_max_winshift = 14
|
|
TCP_max_win = 65535
|
|
|
|
TCP_re_xmit_thresh = 3
|
|
|
|
TCP_mss_default = 1480 ; default max segment size
|
|
|
|
; smoothed round trip time and estimated variance are stored as fixed point numbers,
|
|
; shifted by the value below.
|
|
; With these scales, srtt has 3 bits to the right of the binary point, and thus an "alpha"
|
|
; of .875. rttvar has 2 bits to the right and thus "alpha" of 0.75
|
|
TCP_RTT_SHIFT = 3
|
|
TCP_RTTVAR_SHIFT = 2
|
|
|
|
; bits used by tcp_input and tcp_output
|
|
TCP_BIT_NEEDOUTPUT = 1 shl 0
|
|
TCP_BIT_TIMESTAMP = 1 shl 1
|
|
TCP_BIT_DROPSOCKET = 1 shl 2
|
|
|
|
TCP_BIT_SENDALOT = 1 shl 0
|
|
|
|
TCP_PAWS_IDLE = 24*24*60*60*100 ; 24 days, in 1/100 seconds
|
|
|
|
TCP_QUEUE_SIZE = 50
|
|
|
|
struct TCP_header
|
|
|
|
SourcePort dw ?
|
|
DestinationPort dw ?
|
|
SequenceNumber dd ?
|
|
AckNumber dd ?
|
|
DataOffset db ? ; DataOffset[0-3 bits] and Reserved[4-7]
|
|
Flags db ? ; Reserved[0-1 bits]|URG|ACK|PSH|RST|SYN|FIN
|
|
Window dw ?
|
|
Checksum dw ?
|
|
UrgentPointer dw ?
|
|
|
|
ends
|
|
|
|
struct TCP_queue_entry
|
|
|
|
ip_ptr dd ?
|
|
segment_ptr dd ?
|
|
segment_size dd ?
|
|
device_ptr dd ?
|
|
|
|
buffer_ptr dd ?
|
|
timestamp dd ?
|
|
|
|
ends
|
|
|
|
uglobal
|
|
align 4
|
|
|
|
TCP_segments_tx rd NET_DEVICES_MAX
|
|
TCP_segments_rx rd NET_DEVICES_MAX
|
|
TCP_segments_missed rd NET_DEVICES_MAX
|
|
TCP_segments_dumped rd NET_DEVICES_MAX
|
|
; TCP_bytes_rx rq NET_DEVICES_MAX
|
|
; TCP_bytes_tx rq NET_DEVICES_MAX
|
|
TCP_sequence_num dd ?
|
|
TCP_queue rd (TCP_QUEUE_SIZE*sizeof.TCP_queue_entry + sizeof.queue)/4
|
|
TCP_input_event dd ?
|
|
endg
|
|
|
|
uglobal
|
|
align 4
|
|
|
|
TCPS_accepts dd ? ; #SYNs received in LISTEN state
|
|
TCPS_closed dd ? ; #connections closed (includes drops)
|
|
TCPS_connattempt dd ? ; #connections initiated (calls to connect)
|
|
TCPS_conndrops dd ? ; #embryonic connections dropped (before SYN received)
|
|
TCPS_connects dd ? ; #connections established actively or passively
|
|
TCPS_delack dd ? ; #delayed ACKs sent
|
|
TCPS_drops dd ? ; #connections dropped (after SYN received)
|
|
TCPS_keepdrops dd ? ; #connections dropped in keepalive (established or awaiting SYN)
|
|
TCPS_keepprobe dd ? ; #keepalive probes sent
|
|
TCPS_keeptimeo dd ? ; #times keepalive timer or connections-establishment timer expire
|
|
TCPS_pawsdrop dd ? ; #segments dropped due to PAWS
|
|
TCPS_pcbcachemiss dd ? ; #times PCB cache comparison fails
|
|
TCPS_persisttimeo dd ? ; #times persist timer expires
|
|
TCPS_predack dd ? ; #times header prediction correct for ACKs
|
|
TCPS_preddat dd ? ; #times header prediction correct for data packets
|
|
TCPS_rcvackbyte dd ? ; #bytes ACKed by received ACKs
|
|
TCPS_rcvackpack dd ? ; #received ACK packets
|
|
TCPS_rcvacktoomuch dd ? ; #received ACKs for unsent data
|
|
TCPS_rcvafterclose dd ? ; #packets received after connection closed
|
|
TCPS_rcvbadoff dd ? ; #packets received with invalid header length
|
|
TCPS_rcvbadsum dd ? ; #packets received with checksum errors
|
|
TCPS_rcvbyte dd ? ; #bytes received in sequence
|
|
TCPS_rcvbyteafterwin dd ? ; #bytes received beyond advertised window
|
|
TCPS_rcvdupack dd ? ; #duplicate ACKs received
|
|
TCPS_rcvdupbyte dd ? ; #bytes receivedin completely duplicate packets
|
|
TCPS_rcvduppack dd ? ; #packets received with completely duplicate bytes
|
|
TCPS_rcvoobyte dd ? ; #out-of-order bytes received
|
|
TCPS_rcvoopack dd ? ; #out-of-order packets received
|
|
TCPS_rcvpack dd ? ; #packets received in sequence
|
|
TCPS_rcvpackafterwin dd ? ; #packets with some data beyond advertised window
|
|
TCPS_rcvpartdupbyte dd ? ; #duplicate bytes in part-duplicate packets
|
|
TCPS_rcvpartduppack dd ? ; #packets with some duplicate data
|
|
TCPS_rcvshort dd ? ; #packets received too short
|
|
TCPS_rcvtotal dd ? ; #total packets received
|
|
TCPS_rcvwinprobe dd ? ; #window probe packets received
|
|
TCPS_rcvwinupd dd ? ; #received window update packets
|
|
TCPS_rexmttimeo dd ? ; #retransmission timeouts
|
|
TCPS_rttupdated dd ? ; #times RTT estimators updated
|
|
TCPS_segstimed dd ? ; #segments for which TCP tried to measure RTT
|
|
TCPS_sndacks dd ? ; #ACK-only packets sent (data length = 0)
|
|
TCPS_sndbyte dd ? ; #data bytes sent
|
|
TCPS_sndctrl dd ? ; #control (SYN, FIN, RST) packets sent (data length = 0)
|
|
TCPS_sndpack dd ? ; #data packets sent (data length > 0)
|
|
TCPS_sndprobe dd ? ; #window probes sent (1 byte of data forced by persist timer)
|
|
TCPS_sndrexmitbyte dd ? ; #data bytes retransmitted
|
|
TCPS_sndrexmitpack dd ? ; #data packets retransmitted
|
|
TCPS_sndtotal dd ? ; total #packets sent
|
|
TCPS_sndurg dd ? ; #packets sent with URG-only (data length=0)
|
|
TCPS_sndwinup dd ? ; #window update-only packets sent (data length=0)
|
|
TCPS_timeoutdrop dd ? ; #connections dropped in retransmission timeout
|
|
|
|
endg
|
|
|
|
|
|
;-----------------------------------------------------------------
|
|
;
|
|
; TCP_init
|
|
;
|
|
; This function resets all TCP variables
|
|
;
|
|
;-----------------------------------------------------------------
|
|
macro TCP_init {
|
|
|
|
xor eax, eax
|
|
mov edi, TCP_segments_tx
|
|
mov ecx, (6*NET_DEVICES_MAX)
|
|
rep stosd
|
|
|
|
pseudo_random eax
|
|
mov [TCP_sequence_num], eax
|
|
|
|
init_queue TCP_queue
|
|
|
|
movi ebx, 1
|
|
mov ecx, TCP_process_input
|
|
call new_sys_threads
|
|
test eax, eax
|
|
jns @f
|
|
DEBUGF DEBUG_NETWORK_ERROR,'K : cannot create kernel thread for TCP, error %d\n', eax
|
|
@@:
|
|
|
|
}
|
|
|
|
|
|
include 'tcp_timer.inc'
|
|
include 'tcp_subr.inc'
|
|
include 'tcp_usreq.inc'
|
|
include 'tcp_input.inc'
|
|
include 'tcp_output.inc'
|
|
|
|
|
|
;---------------------------------------------------------------------------
|
|
;
|
|
; TCP_API
|
|
;
|
|
; This function is called by system function 76
|
|
;
|
|
; IN: subfunction number in bl
|
|
; device number in bh
|
|
; ecx, edx, .. depends on subfunction
|
|
;
|
|
; OUT:
|
|
;
|
|
;---------------------------------------------------------------------------
|
|
align 4
|
|
TCP_api:
|
|
|
|
movzx eax, bh
|
|
shl eax, 2
|
|
|
|
test bl, bl
|
|
jz .packets_tx ; 0
|
|
dec bl
|
|
jz .packets_rx ; 1
|
|
dec bl
|
|
jz .packets_missed ; 2
|
|
dec bl
|
|
jz .packets_dumped ; 3
|
|
|
|
.error:
|
|
mov eax, -1
|
|
ret
|
|
|
|
.packets_tx:
|
|
mov eax, [TCP_segments_tx + eax]
|
|
ret
|
|
|
|
.packets_rx:
|
|
mov eax, [TCP_segments_rx + eax]
|
|
ret
|
|
|
|
.packets_missed:
|
|
mov eax, [TCP_segments_missed + eax]
|
|
ret
|
|
|
|
.packets_dumped:
|
|
mov eax, [TCP_segments_dumped + eax]
|
|
ret
|