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1196 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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2362 | hidnplayr | 3 | ;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;; |
1196 | hidnplayr | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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3143 | hidnplayr | 6 | ;; Part of the TCP/IP network stack for KolibriOS ;; |
1196 | hidnplayr | 7 | ;; ;; |
1514 | hidnplayr | 8 | ;; Written by hidnplayr@kolibrios.org ;; |
1196 | hidnplayr | 9 | ;; ;; |
1514 | hidnplayr | 10 | ;; Based on the code of 4.4BSD ;; |
11 | ;; ;; |
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1196 | hidnplayr | 12 | ;; GNU GENERAL PUBLIC LICENSE ;; |
13 | ;; Version 2, June 1991 ;; |
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14 | ;; ;; |
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15 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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1159 | hidnplayr | 16 | |
1206 | hidnplayr | 17 | $Revision: 3143 $ |
1159 | hidnplayr | 18 | |
1514 | hidnplayr | 19 | ; Socket states |
2614 | hidnplayr | 20 | TCPS_CLOSED = 0 |
21 | TCPS_LISTEN = 1 |
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22 | TCPS_SYN_SENT = 2 |
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23 | TCPS_SYN_RECEIVED = 3 |
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24 | TCPS_ESTABLISHED = 4 |
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25 | TCPS_CLOSE_WAIT = 5 |
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26 | TCPS_FIN_WAIT_1 = 6 |
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27 | TCPS_CLOSING = 7 |
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28 | TCPS_LAST_ACK = 8 |
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29 | TCPS_FIN_WAIT_2 = 9 |
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30 | TCPS_TIMED_WAIT = 10 |
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1196 | hidnplayr | 31 | |
1514 | hidnplayr | 32 | ; Socket Flags |
2614 | hidnplayr | 33 | TF_ACKNOW = 1 shl 0 ; ack peer immediately |
34 | TF_DELACK = 1 shl 1 ; ack, but try to delay it |
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35 | TF_NODELAY = 1 shl 2 ; don't delay packets to coalesce |
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36 | TF_NOOPT = 1 shl 3 ; don't use tcp options |
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37 | TF_SENTFIN = 1 shl 4 ; have sent FIN |
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38 | TF_REQ_SCALE = 1 shl 5 ; have/will request window scaling |
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39 | TF_RCVD_SCALE = 1 shl 6 ; other side has requested scaling |
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40 | TF_REQ_TSTMP = 1 shl 7 ; have/will request timestamps |
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41 | TF_RCVD_TSTMP = 1 shl 8 ; a timestamp was received in SYN |
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42 | TF_SACK_PERMIT = 1 shl 9 ; other side said I could SACK |
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1249 | hidnplayr | 43 | |
1514 | hidnplayr | 44 | ; Segment flags |
2614 | hidnplayr | 45 | TH_FIN = 1 shl 0 |
46 | TH_SYN = 1 shl 1 |
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47 | TH_RST = 1 shl 2 |
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48 | TH_PUSH = 1 shl 3 |
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49 | TH_ACK = 1 shl 4 |
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50 | TH_URG = 1 shl 5 |
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1318 | hidnplayr | 51 | |
1514 | hidnplayr | 52 | ; Segment header options |
2614 | hidnplayr | 53 | TCP_OPT_EOL = 0 ; End of option list. |
54 | TCP_OPT_NOP = 1 ; No-Operation. |
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55 | TCP_OPT_MAXSEG = 2 ; Maximum Segment Size. |
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56 | TCP_OPT_WINDOW = 3 ; window scale |
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2953 | hidnplayr | 57 | TCP_OPT_SACK_PERMIT = 4 ; Selective Acknowledgement |
58 | TCP_OPT_SACK = 5 |
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2614 | hidnplayr | 59 | TCP_OPT_TIMESTAMP = 8 |
1514 | hidnplayr | 60 | |
1519 | hidnplayr | 61 | ; Fundamental timer values |
2614 | hidnplayr | 62 | TCP_time_MSL = 47 ; max segment lifetime (30s) |
63 | TCP_time_re_min = 2 ; min retransmission (1,28s) |
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64 | TCP_time_re_max = 100 ; max retransmission (64s) |
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65 | TCP_time_pers_min = 8 ; min persist (5,12s) |
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66 | TCP_time_pers_max = 94 ; max persist (60,16s) |
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3143 | hidnplayr | 67 | TCP_time_keep_init = 118 ; connection establishment (75,52s) |
2614 | hidnplayr | 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) |
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70 | TCP_time_rtt_default = 5 ; default Round Trip Time (3,2s) |
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71 | TCP_time_srtt_default = 0 ; |
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2937 | hidnplayr | 72 | TCP_time_max_idle = 8*TCP_time_keep_interval ; FIXME |
1519 | hidnplayr | 73 | |
74 | ; timer constants |
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2614 | hidnplayr | 75 | TCP_max_rxtshift = 12 ; max retransmissions waiting for ACK |
76 | TCP_max_keepcnt = 8 ; max keepalive probes |
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1519 | hidnplayr | 77 | |
1529 | hidnplayr | 78 | ; |
2614 | hidnplayr | 79 | TCP_max_winshift = 14 |
80 | TCP_max_win = 65535 |
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1519 | hidnplayr | 81 | |
2614 | hidnplayr | 82 | TCP_re_xmit_thresh = 3 |
1763 | hidnplayr | 83 | |
2614 | hidnplayr | 84 | TCP_mss_default = 1480 ; default max segment size |
2305 | hidnplayr | 85 | |
2937 | hidnplayr | 86 | ; smoothed round trip time and estimated variance are stored as fixed point numbers, |
87 | ; shifted by the value below. |
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88 | ; With these scales, srtt has 3 bits to the right of the binary point, and thus an "alpha" |
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89 | ; of .875. rttvar has 2 bits to the right and thus "alpha" of 0.75 |
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90 | TCP_RTT_SHIFT = 3 |
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91 | TCP_RTTVAR_SHIFT = 2 |
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92 | |||
93 | ; bits used by tcp_input and tcp_output |
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94 | TCP_BIT_NEEDOUTPUT = 1 shl 0 |
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95 | TCP_BIT_TIMESTAMP = 1 shl 1 |
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96 | TCP_BIT_DROPSOCKET = 1 shl 2 |
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97 | |||
98 | TCP_BIT_SENDALOT = 1 shl 0 |
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99 | |||
2947 | hidnplayr | 100 | TCP_PAWS_IDLE = 24*24*60*60*100 ; 24 days, in 1/100 seconds |
101 | |||
2612 | hidnplayr | 102 | struct TCP_header |
2305 | hidnplayr | 103 | |
2612 | hidnplayr | 104 | SourcePort dw ? |
105 | DestinationPort dw ? |
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106 | SequenceNumber dd ? |
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107 | AckNumber dd ? |
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108 | DataOffset db ? ; DataOffset[0-3 bits] and Reserved[4-7] |
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109 | Flags db ? ; Reserved[0-1 bits]|URG|ACK|PSH|RST|SYN|FIN |
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110 | Window dw ? |
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111 | Checksum dw ? |
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112 | UrgentPointer dw ? |
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113 | |||
1159 | hidnplayr | 114 | ends |
115 | |||
1196 | hidnplayr | 116 | align 4 |
117 | uglobal |
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2924 | hidnplayr | 118 | TCP_segments_tx rd MAX_NET_DEVICES |
119 | TCP_segments_rx rd MAX_NET_DEVICES |
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120 | TCP_bytes_rx rq MAX_NET_DEVICES |
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121 | TCP_bytes_tx rq MAX_NET_DEVICES |
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2612 | hidnplayr | 122 | TCP_sequence_num dd ? |
1196 | hidnplayr | 123 | endg |
124 | |||
125 | |||
126 | ;----------------------------------------------------------------- |
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127 | ; |
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128 | ; TCP_init |
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129 | ; |
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130 | ; This function resets all TCP variables |
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131 | ; |
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132 | ;----------------------------------------------------------------- |
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2612 | hidnplayr | 133 | macro TCP_init { |
1196 | hidnplayr | 134 | |
2612 | hidnplayr | 135 | xor eax, eax |
2614 | hidnplayr | 136 | mov edi, TCP_segments_tx |
2924 | hidnplayr | 137 | mov ecx, (6*MAX_NET_DEVICES) |
2612 | hidnplayr | 138 | rep stosd |
1196 | hidnplayr | 139 | |
2612 | hidnplayr | 140 | pseudo_random eax |
141 | mov [TCP_sequence_num], eax |
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1196 | hidnplayr | 142 | |
1529 | hidnplayr | 143 | } |
1196 | hidnplayr | 144 | |
145 | |||
1733 | hidnplayr | 146 | include 'tcp_timer.inc' |
147 | include 'tcp_subr.inc' |
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148 | include 'tcp_input.inc' |
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149 | include 'tcp_output.inc' |
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1159 | hidnplayr | 150 | |
1529 | hidnplayr | 151 | |
1254 | hidnplayr | 152 | ;--------------------------------------------------------------------------- |
153 | ; |
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154 | ; TCP_API |
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155 | ; |
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2866 | hidnplayr | 156 | ; This function is called by system function 76 |
1254 | hidnplayr | 157 | ; |
158 | ; IN: subfunction number in bl |
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159 | ; device number in bh |
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160 | ; ecx, edx, .. depends on subfunction |
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161 | ; |
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162 | ; OUT: |
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163 | ; |
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164 | ;--------------------------------------------------------------------------- |
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165 | align 4 |
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2614 | hidnplayr | 166 | TCP_api: |
1254 | hidnplayr | 167 | |
2612 | hidnplayr | 168 | movzx eax, bh |
169 | shl eax, 2 |
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1254 | hidnplayr | 170 | |
2612 | hidnplayr | 171 | test bl, bl |
172 | jz .packets_tx ; 0 |
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173 | dec bl |
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174 | jz .packets_rx ; 1 |
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1254 | hidnplayr | 175 | |
2614 | hidnplayr | 176 | .error: |
2612 | hidnplayr | 177 | mov eax, -1 |
178 | ret |
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1254 | hidnplayr | 179 | |
2614 | hidnplayr | 180 | .packets_tx: |
181 | mov eax, [TCP_segments_tx + eax] |
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2612 | hidnplayr | 182 | ret |
1254 | hidnplayr | 183 | |
2614 | hidnplayr | 184 | .packets_rx: |
185 | mov eax, [TCP_segments_rx + eax] |
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2612 | hidnplayr | 186 | ret |