forked from KolibriOS/kolibrios
219 lines
7.0 KiB
PHP
219 lines
7.0 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2013. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;; Part of the TCP/IP network stack for KolibriOS ;;
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;; ;;
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;; Written by hidnplayr@kolibrios.org ;;
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;; ;;
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;; Based on the code of 4.4BSD ;;
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;; ;;
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;; GNU GENERAL PUBLIC LICENSE ;;
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;; Version 2, June 1991 ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision$
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; Socket states
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TCPS_CLOSED = 0
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TCPS_LISTEN = 1
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TCPS_SYN_SENT = 2
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TCPS_SYN_RECEIVED = 3
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TCPS_ESTABLISHED = 4
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TCPS_CLOSE_WAIT = 5
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TCPS_FIN_WAIT_1 = 6
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TCPS_CLOSING = 7
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TCPS_LAST_ACK = 8
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TCPS_FIN_WAIT_2 = 9
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TCPS_TIMED_WAIT = 10
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; Socket Flags
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TF_ACKNOW = 1 shl 0 ; ack peer immediately
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TF_DELACK = 1 shl 1 ; ack, but try to delay it
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TF_NODELAY = 1 shl 2 ; don't delay packets to coalesce
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TF_NOOPT = 1 shl 3 ; don't use tcp options
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TF_SENTFIN = 1 shl 4 ; have sent FIN
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TF_REQ_SCALE = 1 shl 5 ; have/will request window scaling
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TF_RCVD_SCALE = 1 shl 6 ; other side has requested scaling
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TF_REQ_TSTMP = 1 shl 7 ; have/will request timestamps
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TF_RCVD_TSTMP = 1 shl 8 ; a timestamp was received in SYN
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TF_SACK_PERMIT = 1 shl 9 ; other side said I could SACK
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; Segment flags
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TH_FIN = 1 shl 0
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TH_SYN = 1 shl 1
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TH_RST = 1 shl 2
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TH_PUSH = 1 shl 3
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TH_ACK = 1 shl 4
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TH_URG = 1 shl 5
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; Segment header options
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TCP_OPT_EOL = 0 ; End of option list.
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TCP_OPT_NOP = 1 ; No-Operation.
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TCP_OPT_MAXSEG = 2 ; Maximum Segment Size.
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TCP_OPT_WINDOW = 3 ; window scale
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TCP_OPT_SACK_PERMIT = 4 ; Selective Acknowledgement
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TCP_OPT_SACK = 5
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TCP_OPT_TIMESTAMP = 8
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; Fundamental timer values
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TCP_time_MSL = 47 ; max segment lifetime (30s)
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TCP_time_re_min = 2 ; min retransmission (1,28s)
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TCP_time_re_max = 100 ; max retransmission (64s)
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TCP_time_pers_min = 8 ; min persist (5,12s)
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TCP_time_pers_max = 94 ; max persist (60,16s)
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TCP_time_keep_init = 118 ; connection establishment (75,52s)
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TCP_time_keep_idle = 4608 ; idle time before 1st probe (2h)
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TCP_time_keep_interval = 118 ; between probes when no response (75,52s)
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TCP_time_rtt_default = 5 ; default Round Trip Time (3,2s)
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TCP_time_srtt_default = 0 ;
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TCP_time_max_idle = 8*TCP_time_keep_interval ; FIXME
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; timer constants
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TCP_max_rxtshift = 12 ; max retransmissions waiting for ACK
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TCP_max_keepcnt = 8 ; max keepalive probes
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;
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TCP_max_winshift = 14
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TCP_max_win = 65535
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TCP_re_xmit_thresh = 3
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TCP_mss_default = 1480 ; default max segment size
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; smoothed round trip time and estimated variance are stored as fixed point numbers,
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; shifted by the value below.
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; With these scales, srtt has 3 bits to the right of the binary point, and thus an "alpha"
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; of .875. rttvar has 2 bits to the right and thus "alpha" of 0.75
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TCP_RTT_SHIFT = 3
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TCP_RTTVAR_SHIFT = 2
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; bits used by tcp_input and tcp_output
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TCP_BIT_NEEDOUTPUT = 1 shl 0
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TCP_BIT_TIMESTAMP = 1 shl 1
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TCP_BIT_DROPSOCKET = 1 shl 2
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TCP_BIT_SENDALOT = 1 shl 0
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TCP_PAWS_IDLE = 24*24*60*60*100 ; 24 days, in 1/100 seconds
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TCP_QUEUE_SIZE = 50
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struct TCP_header
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SourcePort dw ?
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DestinationPort dw ?
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SequenceNumber dd ?
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AckNumber dd ?
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DataOffset db ? ; DataOffset[0-3 bits] and Reserved[4-7]
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Flags db ? ; Reserved[0-1 bits]|URG|ACK|PSH|RST|SYN|FIN
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Window dw ?
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Checksum dw ?
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UrgentPointer dw ?
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ends
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struct TCP_queue_entry
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ip_ptr dd ?
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segment_ptr dd ?
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segment_size dd ?
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device_ptr dd ?
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buffer_ptr dd ?
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buffer_size dd ?
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ends
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align 4
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uglobal
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TCP_segments_tx rd MAX_NET_DEVICES
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TCP_segments_rx rd MAX_NET_DEVICES
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TCP_segments_missed rd MAX_NET_DEVICES
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TCP_segments_dumped rd MAX_NET_DEVICES
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; TCP_bytes_rx rq MAX_NET_DEVICES
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; TCP_bytes_tx rq MAX_NET_DEVICES
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TCP_sequence_num dd ?
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TCP_queue rd TCP_QUEUE_SIZE*sizeof.TCP_queue_entry/4
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endg
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;-----------------------------------------------------------------
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;
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; TCP_init
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;
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; This function resets all TCP variables
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;
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;-----------------------------------------------------------------
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macro TCP_init {
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xor eax, eax
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mov edi, TCP_segments_tx
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mov ecx, (6*MAX_NET_DEVICES)
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rep stosd
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pseudo_random eax
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mov [TCP_sequence_num], eax
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init_queue TCP_queue
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}
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include 'tcp_timer.inc'
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include 'tcp_subr.inc'
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include 'tcp_usreq.inc'
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include 'tcp_input.inc'
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include 'tcp_output.inc'
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;---------------------------------------------------------------------------
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;
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; TCP_API
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;
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; This function is called by system function 76
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;
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; IN: subfunction number in bl
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; device number in bh
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; ecx, edx, .. depends on subfunction
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;
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; OUT:
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;
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;---------------------------------------------------------------------------
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align 4
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TCP_api:
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movzx eax, bh
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shl eax, 2
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test bl, bl
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jz .packets_tx ; 0
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dec bl
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jz .packets_rx ; 1
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dec bl
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jz .packets_missed ; 2
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dec bl
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jz .packets_dumped ; 3
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.error:
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mov eax, -1
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ret
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.packets_tx:
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mov eax, [TCP_segments_tx + eax]
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ret
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.packets_rx:
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mov eax, [TCP_segments_rx + eax]
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ret
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.packets_missed:
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mov eax, [TCP_segments_missed + eax]
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ret
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.packets_dumped:
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mov eax, [TCP_segments_dumped + eax]
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ret
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