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261 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; |
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3 | ;; SOCKET.INC |
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4 | ;; |
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5 | ;; Sockets constants, structures and functions |
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6 | ;; |
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7 | ;; Last revision: 11.11.2006 |
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8 | ;; |
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9 | ;; This file contains the following: |
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10 | ;; is_localport_unused |
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11 | ;; get_free_socket |
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12 | ;; socket_open |
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13 | ;; socket_open_tcp |
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14 | ;; socket_close |
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15 | ;; socket_close_tcp |
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16 | ;; socket_poll |
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17 | ;; socket_status |
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18 | ;; socket_read |
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19 | ;; socket_write |
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20 | ;; socket_write_tcp |
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379 | serge | 21 | ;; |
22 | ;; |
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261 | hidnplayr | 23 | ;; Changes history: |
24 | ;; 22.09.2003 - [Mike Hibbett] : mikeh@oceanfree.net |
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25 | ;; 11.11.2006 - [Johnny_B] and [smb] |
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26 | ;; |
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27 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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28 | |||
29 | ; |
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30 | ; Socket Descriptor + Buffer |
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31 | ; |
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32 | ; 0 1 2 3 |
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33 | ; 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
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34 | ; |
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35 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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36 | ; 0| Status ( of this buffer ) | |
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37 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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38 | ; 4| Application Process ID | |
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39 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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40 | ; 8| Local IP Address | |
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41 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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42 | ; 12| Local IP Port | Unused ( set to 0 ) | |
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43 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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44 | ; 16| Remote IP Address | |
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45 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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46 | ; 20| Remote IP Port | Unused ( set to 0 ) | |
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47 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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48 | ; 24| Rx Data Count INTEL format| |
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49 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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50 | ; 28| TCB STATE INTEL format| |
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51 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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52 | ; 32| TCB Timer (seconds) INTEL format| |
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53 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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54 | ; 36| ISS (Inital Sequence # used by this connection ) INET format| |
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55 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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56 | ; 40| IRS ( Inital Receive Sequence # ) INET format| |
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57 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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58 | ; 44| SND.UNA Seq # of unack'ed sent packets INET format| |
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59 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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60 | ; 48| SND.NXT Next send seq # to use INET format| |
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61 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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62 | ; 52| SND.WND Send window INET format| |
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63 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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64 | ; 56| RCV.NXT Next expected receive sequence # INET format| |
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65 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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66 | ; 60| RCV.WND Receive window INET format| |
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67 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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68 | ; 64| SEG.LEN Segment length INTEL format| |
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69 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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70 | ; 68| SEG.WND Segment window INTEL format| |
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71 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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72 | ; 72| Retransmit queue # NOW WINDOW SIZE TIMER INTEL format| |
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73 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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379 | serge | 74 | ; 76| RX offset from |
261 | hidnplayr | 75 | ; 76| RX Data | |
76 | ; +-+-+-.......... -+ |
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77 | |||
78 | |||
79 | ; so, define struct |
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80 | struc SOCKET |
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379 | serge | 81 | { .Status dd ? ;+00 - Status ( of this buffer ) |
82 | .PID dd ? ;+04 - Application Process ID |
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323 | hidnplayr | 83 | .LocalIP dd ? ;+08 - Local IP Address |
84 | .LocalPort dw ? ;+12 - Local Port |
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85 | .UnusedL dw ? ;+14 - may be removed in future |
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86 | .RemoteIP dd ? ;+16 - Remote IP Address |
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87 | .RemotePort dw ? ;+20 - Remote Port |
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88 | .UnusedR dw ? ;+22 - may be removed in future |
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89 | .rxDataCount dd ? ;+24 - Rx Data Count |
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90 | .TCBState dd ? ;+28 - TCB STATE |
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379 | serge | 91 | .TCBTimer dd ? ;+32 - TCB Timer (seconds) |
323 | hidnplayr | 92 | .ISS dd ? ;+36 - Initial Send Sequence |
93 | .IRS dd ? ;+40 - Initial Receive Sequence |
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94 | .SND_UNA dd ? ;+44 - Sequence number of unack'ed sent packets |
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379 | serge | 95 | .SND_NXT dd ? ;+48 - Next send sequence number to use |
323 | hidnplayr | 96 | .SND_WND dd ? ;+52 - Send window |
97 | .RCV_NXT dd ? ;+56 - Next receive sequence number to use |
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98 | .RCV_WND dd ? ;+60 - Receive window |
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99 | .SEG_LEN dd ? ;+64 - Segment length |
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100 | .SEG_WND dd ? ;+68 - Segment window |
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379 | serge | 101 | .wndsizeTimer dd ? ;+72 - Retransmit queue # NOW WINDOW SIZE TIMER |
323 | hidnplayr | 102 | .rxData dd ? ;+76 - receive data buffer here |
261 | hidnplayr | 103 | } |
104 | |||
105 | virtual at 0 |
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106 | SOCKET SOCKET |
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107 | end virtual |
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108 | |||
379 | serge | 109 | ; simple macro calcing real memory address of SOCKET struct by socket's |
261 | hidnplayr | 110 | macro Index2RealAddr reg |
111 | { |
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323 | hidnplayr | 112 | shl reg, 12 |
379 | serge | 113 | add reg, sockets |
261 | hidnplayr | 114 | } |
115 | |||
116 | ;Constants |
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117 | ; current socket statuses |
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323 | hidnplayr | 118 | SOCK_EMPTY equ 0 ; socket not in use |
119 | SOCK_OPEN equ 1 ; open issued, but no data sent |
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261 | hidnplayr | 120 | |
121 | ; TCP opening modes |
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323 | hidnplayr | 122 | SOCKET_PASSIVE equ 0 |
123 | SOCKET_ACTIVE equ 1 |
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261 | hidnplayr | 124 | |
125 | ;*************************************************************************** |
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126 | ; Function |
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127 | ; is_localport_unused |
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128 | ; |
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129 | ; Description |
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130 | ; scans through all the active sockets , looking to see if the |
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131 | ; port number specified in bx is in use as a localport number. |
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132 | ; This is useful when you want a to generate a unique local port |
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133 | ; number. |
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134 | ; On return, eax = 1 for free, 0 for in use |
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135 | ; |
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136 | ;*************************************************************************** |
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137 | is_localport_unused: |
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138 | mov al, bh |
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139 | mov ah, bl |
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140 | mov bx, ax |
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141 | |||
142 | mov edx, SOCKETBUFFSIZE * NUM_SOCKETS |
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143 | mov ecx, NUM_SOCKETS |
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323 | hidnplayr | 144 | mov eax, 0 ; Assume the return value is 'in use' |
261 | hidnplayr | 145 | |
146 | ilu1: |
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147 | sub edx, SOCKETBUFFSIZE |
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148 | cmp [edx + sockets + SOCKET.LocalPort], bx |
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323 | hidnplayr | 149 | loopnz ilu1 ; Return back if the socket is occupied |
261 | hidnplayr | 150 | |
323 | hidnplayr | 151 | jz ilu_exit |
152 | inc eax ; return port not in use |
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261 | hidnplayr | 153 | |
154 | ilu_exit: |
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155 | ret |
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156 | |||
157 | |||
158 | |||
159 | ;*************************************************************************** |
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160 | ; Function |
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161 | ; get_free_socket |
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162 | ; |
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163 | ; Description |
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164 | ; |
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165 | ;*************************************************************************** |
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166 | get_free_socket: |
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167 | push ecx |
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168 | mov eax, SOCKETBUFFSIZE * NUM_SOCKETS |
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169 | mov ecx, NUM_SOCKETS |
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170 | |||
171 | gfs1: |
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172 | sub eax, SOCKETBUFFSIZE |
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173 | cmp [eax + sockets + SOCKET.Status], dword SOCK_EMPTY |
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323 | hidnplayr | 174 | loopnz gfs1 ; Return back if the socket is occupied |
261 | hidnplayr | 175 | mov eax, ecx |
176 | pop ecx |
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323 | hidnplayr | 177 | jz gfs_exit |
261 | hidnplayr | 178 | mov eax, 0xFFFFFFFF |
179 | |||
180 | gfs_exit: |
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181 | ret |
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182 | |||
183 | |||
184 | ;*************************************************************************** |
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185 | ; Function |
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186 | ; socket_open |
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187 | ; |
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188 | ; Description |
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189 | ; find a free socket |
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190 | ; local port in ebx |
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191 | ; remote port in ecx |
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192 | ; remote ip in edx |
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193 | ; return socket # in eax, -1 if none available |
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194 | ; |
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195 | ;*************************************************************************** |
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196 | socket_open: |
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197 | call get_free_socket |
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198 | |||
199 | cmp eax, 0xFFFFFFFF |
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323 | hidnplayr | 200 | jz so_exit |
261 | hidnplayr | 201 | |
202 | ; ax holds the socket number that is free. Get real address |
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203 | push eax |
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204 | Index2RealAddr eax |
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205 | |||
206 | mov [eax + SOCKET.Status], dword SOCK_OPEN |
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207 | |||
323 | hidnplayr | 208 | xchg bh, bl |
209 | mov [eax + SOCKET.LocalPort], bx |
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210 | xchg ch, cl |
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211 | mov [eax + SOCKET.RemotePort], cx |
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261 | hidnplayr | 212 | |
213 | mov ebx, [stack_ip] |
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379 | serge | 214 | mov [eax + SOCKET.LocalIP], ebx |
215 | mov [eax + SOCKET.RemoteIP], edx |
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261 | hidnplayr | 216 | mov [eax + SOCKET.rxDataCount], dword 0 ; recieved data count |
217 | |||
379 | serge | 218 | mov esi, [TASK_BASE] |
261 | hidnplayr | 219 | mov ebx, [esi+TASKDATA.pid] |
323 | hidnplayr | 220 | mov [eax + SOCKET.PID], ebx ; save the process ID |
261 | hidnplayr | 221 | pop eax ; Get the socket number back, so we can return it |
222 | |||
223 | so_exit: |
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224 | ret |
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225 | |||
226 | |||
227 | |||
228 | ;*************************************************************************** |
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229 | ; Function |
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230 | ; socket_open_tcp |
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231 | ; |
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232 | ; Description |
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233 | ; Opens a TCP socket in PASSIVE or ACTIVE mode |
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234 | ; find a free socket |
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235 | ; local port in ebx ( intel format ) |
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236 | ; remote port in ecx ( intel format ) |
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237 | ; remote ip in edx ( in Internet byte order ) |
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238 | ; Socket open mode in esi ( SOCKET_PASSIVE or SOCKET_ACTIVE ) |
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239 | ; return socket # in eax, -1 if none available |
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240 | ; |
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241 | ;*************************************************************************** |
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242 | socket_open_tcp: |
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243 | call get_free_socket |
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244 | |||
245 | cmp eax, 0xFFFFFFFF |
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323 | hidnplayr | 246 | jz so_exit |
261 | hidnplayr | 247 | |
248 | ; ax holds the socket number that is free. Get real address |
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249 | push eax |
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250 | Index2RealAddr eax |
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251 | |||
252 | mov [sktAddr], eax |
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253 | mov [eax], dword SOCK_OPEN |
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254 | |||
255 | ; TODO - check this works! |
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256 | mov [eax + SOCKET.wndsizeTimer], dword 0 ; Reset the window timer. |
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257 | |||
323 | hidnplayr | 258 | xchg bh, bl |
379 | serge | 259 | mov [eax + SOCKET.LocalPort], bx |
261 | hidnplayr | 260 | ; mov [eax + 12], byte bh ; Local port ( LS 16 bits ) |
261 | ; mov [eax + 13], byte bl ; Local port ( LS 16 bits ) |
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262 | |||
323 | hidnplayr | 263 | xchg ch, cl |
379 | serge | 264 | mov [eax + SOCKET.RemotePort], cx |
261 | hidnplayr | 265 | ; mov [eax + 20], ch ; Remote Port ( LS 16 bits ) |
266 | ; mov [eax + 21], cl ; Remote Port ( LS 16 bits ) |
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267 | |||
268 | mov ebx, [stack_ip] |
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379 | serge | 269 | mov [eax + SOCKET.LocalIP], ebx |
270 | mov [eax + SOCKET.RemoteIP], edx |
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271 | mov [eax + SOCKET.rxDataCount], dword 0 |
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261 | hidnplayr | 272 | |
273 | ; Now fill in TCB state |
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274 | mov ebx, TCB_LISTEN |
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275 | cmp esi, SOCKET_PASSIVE |
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323 | hidnplayr | 276 | jz sot_001 |
261 | hidnplayr | 277 | mov ebx, TCB_SYN_SENT |
278 | |||
279 | sot_001: |
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323 | hidnplayr | 280 | mov [eax + SOCKET.TCBState], ebx ; Indicate the state of the TCB |
261 | hidnplayr | 281 | |
379 | serge | 282 | mov esi, [TASK_BASE] |
261 | hidnplayr | 283 | mov ecx, [esi+TASKDATA.pid] |
323 | hidnplayr | 284 | mov [eax + SOCKET.PID], ecx ; save the process ID |
261 | hidnplayr | 285 | |
286 | cmp ebx, TCB_LISTEN |
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323 | hidnplayr | 287 | je sot_done |
261 | hidnplayr | 288 | |
289 | ; Now, if we are in active mode, then we have to send a SYN to the specified remote port |
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290 | mov eax, EMPTY_QUEUE |
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291 | call dequeue |
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292 | cmp ax, NO_BUFFER |
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323 | hidnplayr | 293 | je sot_done |
261 | hidnplayr | 294 | |
295 | push eax |
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296 | |||
323 | hidnplayr | 297 | mov bl, 0x02 ; SYN |
261 | hidnplayr | 298 | mov ecx, 0 |
299 | |||
300 | call buildTCPPacket |
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301 | |||
302 | mov eax, NET1OUT_QUEUE |
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303 | |||
304 | mov edx, [stack_ip] |
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305 | mov ecx, [sktAddr ] |
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306 | mov ecx, [ecx + 16] |
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307 | cmp edx, ecx |
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308 | jne sot_notlocal |
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309 | mov eax, IPIN_QUEUE |
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310 | |||
311 | sot_notlocal: |
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312 | ; Send it. |
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313 | pop ebx |
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314 | call queue |
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315 | |||
316 | mov esi, [sktAddr] |
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317 | |||
318 | ; increment SND.NXT in socket |
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319 | add esi, 48 |
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320 | call inc_inet_esi |
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321 | |||
322 | sot_done: |
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323 | pop eax ; Get the socket number back, so we can return it |
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324 | |||
325 | sot_exit: |
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326 | ret |
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327 | |||
328 | |||
329 | |||
330 | ;*************************************************************************** |
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331 | ; Function |
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332 | ; socket_close |
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333 | ; |
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334 | ; Description |
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335 | ; socket # in ebx |
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336 | ; returns 0 for ok, -1 for socket not open (fail) |
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337 | ; |
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338 | ;*************************************************************************** |
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339 | socket_close: |
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340 | Index2RealAddr ebx |
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323 | hidnplayr | 341 | mov eax, 0xFFFFFFFF ; assume this operation will fail.. |
261 | hidnplayr | 342 | cmp [ebx + SOCKET.Status], dword SOCK_EMPTY |
323 | hidnplayr | 343 | jz sc_exit |
261 | hidnplayr | 344 | |
345 | ; Clear the socket varaibles |
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346 | xor eax, eax |
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347 | mov edi, ebx |
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348 | mov ecx, SOCKETHEADERSIZE |
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349 | cld |
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350 | rep stosb |
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351 | |||
352 | sc_exit: |
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353 | ret |
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354 | |||
355 | |||
356 | |||
357 | ;*************************************************************************** |
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358 | ; Function |
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359 | ; socket_close_tcp |
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360 | ; |
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361 | ; Description |
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362 | ; socket # in ebx |
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363 | ; returns 0 for ok, -1 for socket not open (fail) |
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364 | ; |
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365 | ;*************************************************************************** |
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366 | socket_close_tcp: |
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367 | ; first, remove any resend entries |
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368 | pusha |
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369 | |||
370 | mov esi, resendQ |
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371 | mov ecx, 0 |
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372 | |||
373 | sct001: |
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374 | cmp ecx, NUMRESENDENTRIES |
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323 | hidnplayr | 375 | je sct003 ; None left |
261 | hidnplayr | 376 | cmp [esi], bl |
323 | hidnplayr | 377 | je sct002 ; found one |
261 | hidnplayr | 378 | inc ecx |
379 | add esi, 4 |
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380 | jmp sct001 |
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381 | |||
382 | sct002: |
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383 | |||
384 | mov [esi], byte 0xFF |
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385 | jmp sct001 |
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386 | |||
387 | sct003: |
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388 | popa |
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389 | |||
390 | Index2RealAddr ebx |
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391 | mov [sktAddr], ebx |
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323 | hidnplayr | 392 | mov eax, 0xFFFFFFFF ; assume this operation will fail.. |
261 | hidnplayr | 393 | cmp [ebx + SOCKET.Status], dword SOCK_EMPTY |
323 | hidnplayr | 394 | jz sct_exit |
261 | hidnplayr | 395 | |
396 | ; Now construct the response, and queue for sending by IP |
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397 | mov eax, EMPTY_QUEUE |
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398 | call dequeue |
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399 | cmp ax, NO_BUFFER |
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323 | hidnplayr | 400 | je stl_exit |
261 | hidnplayr | 401 | |
402 | push eax |
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403 | |||
323 | hidnplayr | 404 | mov bl, 0x11 ; FIN + ACK |
261 | hidnplayr | 405 | mov ecx, 0 |
406 | mov esi, 0 |
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407 | |||
408 | call buildTCPPacket |
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409 | |||
410 | mov ebx, [sktAddr] |
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411 | |||
412 | ; increament SND.NXT in socket |
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413 | mov esi, 48 |
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414 | add esi, ebx |
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415 | call inc_inet_esi |
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416 | |||
417 | |||
418 | ; Get the socket state |
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419 | mov eax, [ebx + SOCKET.TCBState] |
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420 | cmp eax, TCB_LISTEN |
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323 | hidnplayr | 421 | je destroyTCB |
261 | hidnplayr | 422 | cmp eax, TCB_SYN_SENT |
323 | hidnplayr | 423 | je destroyTCB |
261 | hidnplayr | 424 | cmp eax, TCB_SYN_RECEIVED |
323 | hidnplayr | 425 | je sct_finwait1 |
261 | hidnplayr | 426 | cmp eax, TCB_ESTABLISHED |
323 | hidnplayr | 427 | je sct_finwait1 |
261 | hidnplayr | 428 | |
429 | ; assume CLOSE WAIT |
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430 | ; Send a fin, then enter last-ack state |
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431 | mov eax, TCB_LAST_ACK |
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432 | mov [ebx + SOCKET.TCBState], eax |
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433 | xor eax, eax |
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434 | jmp sct_send |
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435 | |||
436 | sct_finwait1: |
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437 | ; Send a fin, then enter finwait2 state |
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438 | mov eax, TCB_FIN_WAIT_1 |
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439 | mov [ebx + SOCKET.TCBState], eax |
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440 | xor eax, eax |
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441 | |||
442 | sct_send: |
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443 | mov eax, NET1OUT_QUEUE |
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444 | |||
445 | mov edx, [stack_ip] |
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446 | mov ecx, [sktAddr ] |
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447 | mov ecx, [ecx + 16] |
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448 | cmp edx, ecx |
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449 | jne sct_notlocal |
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450 | mov eax, IPIN_QUEUE |
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451 | |||
452 | sct_notlocal: |
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453 | ; Send it. |
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454 | pop ebx |
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455 | call queue |
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456 | jmp sct_exit |
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457 | |||
458 | destroyTCB: |
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459 | pop eax |
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460 | ; Clear the socket varaibles |
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461 | xor eax, eax |
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462 | mov edi, ebx |
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463 | mov ecx, SOCKETHEADERSIZE |
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464 | cld |
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465 | rep stosb |
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466 | |||
467 | sct_exit: |
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468 | ret |
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469 | |||
470 | |||
471 | |||
472 | ;*************************************************************************** |
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473 | ; Function |
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474 | ; socket_poll |
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475 | ; |
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476 | ; Description |
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477 | ; socket # in ebx |
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478 | ; returns count in eax. |
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479 | ; |
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480 | ;*************************************************************************** |
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481 | socket_poll: |
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482 | Index2RealAddr ebx |
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483 | mov eax, [ebx + SOCKET.rxDataCount] |
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484 | |||
485 | ret |
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486 | |||
487 | |||
488 | |||
489 | ;*************************************************************************** |
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490 | ; Function |
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491 | ; socket_status |
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492 | ; |
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493 | ; Description |
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494 | ; socket # in ebx |
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495 | ; returns TCB state in eax. |
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496 | ; |
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497 | ;*************************************************************************** |
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498 | socket_status: |
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499 | Index2RealAddr ebx |
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500 | mov eax, [ebx + SOCKET.TCBState] |
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501 | |||
502 | ret |
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503 | |||
504 | |||
505 | |||
506 | ;*************************************************************************** |
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507 | ; Function |
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508 | ; socket_read |
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509 | ; |
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510 | ; Description |
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511 | ; socket # in ebx |
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512 | ; returns # of bytes remaining in eax, data in bl |
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513 | ; |
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514 | ;*************************************************************************** |
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515 | socket_read: |
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516 | Index2RealAddr ebx |
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323 | hidnplayr | 517 | mov eax, [ebx + SOCKET.rxDataCount] ; get count of bytes |
261 | hidnplayr | 518 | mov ecx, 1 |
519 | test eax, eax |
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323 | hidnplayr | 520 | jz sr2 |
261 | hidnplayr | 521 | |
522 | dec eax |
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323 | hidnplayr | 523 | mov esi, ebx ; esi is address of socket |
524 | mov [ebx + SOCKET.rxDataCount], eax ; store new count |
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261 | hidnplayr | 525 | ;movzx ebx, byte [ebx + SOCKET.rxData] ; get the byte |
323 | hidnplayr | 526 | movzx ebx, byte [ebx + SOCKETHEADERSIZE] ; get the byte |
261 | hidnplayr | 527 | add esi, SOCKETHEADERSIZE |
528 | mov edi, esi |
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529 | inc esi |
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530 | |||
531 | mov ecx, (SOCKETBUFFSIZE - SOCKETHEADERSIZE) / 4 |
||
532 | cld |
||
533 | rep movsd |
||
534 | xor ecx, ecx |
||
535 | |||
536 | sr1: |
||
537 | jmp sor_exit |
||
538 | |||
539 | sr2: |
||
540 | xor bl, bl |
||
541 | |||
542 | sor_exit: |
||
543 | ret |
||
544 | |||
545 | |||
323 | hidnplayr | 546 | ;*************************************************************************** |
547 | ; Function |
||
548 | ; socket_read_packet |
||
549 | ; |
||
550 | ; Description |
||
551 | ; socket # in ebx |
||
552 | ; datapointer # in ecx |
||
553 | ; buffer size in edx |
||
554 | ; returns # of bytes copied in eax |
||
555 | ; |
||
556 | ;*************************************************************************** |
||
557 | socket_read_packet: |
||
558 | Index2RealAddr ebx ; get real socket address |
||
559 | mov eax, [ebx + SOCKET.rxDataCount] ; get count of bytes |
||
560 | test eax, eax ; if count of bytes is zero.. |
||
561 | jz .exit ; exit function (eax will be zero) |
||
261 | hidnplayr | 562 | |
323 | hidnplayr | 563 | test edx, edx ; if buffer size is zero, copy all data |
564 | jz .copyallbytes |
||
565 | cmp edx, eax ; if buffer size is larger then the bytes of data, copy all data |
||
566 | jge .copyallbytes |
||
567 | |||
568 | sub eax, edx ; store new count (data bytes in buffer - bytes we're about to copy) |
||
569 | mov [ebx + SOCKET.rxDataCount], eax ; |
||
570 | push eax |
||
571 | mov eax, edx ; number of bytes we want to copy must be in eax |
||
572 | call .startcopy ; copy to the application |
||
573 | |||
574 | mov esi, ebx ; now we're going to copy the remaining bytes to the beginning |
||
575 | add esi, SOCKETHEADERSIZE ; we dont need to copy the header |
||
576 | mov edi, esi ; edi is where we're going to copy to |
||
577 | add esi, edx ; esi is from where we copy |
||
578 | pop ecx ; count of bytes we have left |
||
579 | push ecx ; push it again so we can re-use it later |
||
580 | shr ecx, 2 ; divide eax by 4 |
||
581 | cld |
||
582 | rep movsd ; copy all full dwords |
||
583 | pop ecx |
||
584 | and ecx, 3 |
||
585 | rep movsb ; copy remaining bytes |
||
586 | |||
587 | ret ; at last, exit |
||
588 | |||
589 | .copyallbytes: |
||
590 | xor esi, esi |
||
591 | mov [ebx + SOCKET.rxDataCount], esi ; store new count (zero) |
||
592 | |||
593 | .startcopy: |
||
594 | mov edi, ecx ; |
||
595 | add edi, std_application_base_address ; get data pointer to buffer in application |
||
596 | |||
597 | mov esi, ebx ; |
||
598 | add esi, SOCKETHEADERSIZE ; we dont need to copy the header |
||
599 | mov ecx, eax ; eax is count of bytes |
||
600 | push ecx |
||
601 | shr ecx, 2 ; divide eax by 4 |
||
602 | cld ; copy all full dwords |
||
603 | rep movsd ; |
||
604 | pop ecx |
||
605 | and ecx, 3 |
||
606 | rep movsb ; copy the rest bytes |
||
607 | |||
608 | .exit: |
||
609 | ret ; exit, or go back to shift remaining bytes if any |
||
610 | |||
611 | |||
612 | |||
613 | |||
261 | hidnplayr | 614 | ;*************************************************************************** |
615 | ; Function |
||
616 | ; socket_write |
||
617 | ; |
||
618 | ; Description |
||
619 | ; socket in ebx |
||
620 | ; # of bytes to write in ecx |
||
621 | ; pointer to data in edx |
||
622 | ; returns 0 in eax ok, -1 == failed ( invalid socket, or |
||
623 | ; could not queue IP packet ) |
||
624 | ; |
||
625 | ;*************************************************************************** |
||
626 | socket_write: |
||
627 | Index2RealAddr ebx |
||
628 | |||
629 | mov eax, 0xFFFFFFFF |
||
630 | ; If the socket is invalid, return with an error code |
||
631 | cmp [ebx], dword SOCK_EMPTY |
||
323 | hidnplayr | 632 | je sw_exit |
261 | hidnplayr | 633 | |
634 | |||
635 | mov eax, EMPTY_QUEUE |
||
636 | call dequeue |
||
637 | cmp ax, NO_BUFFER |
||
323 | hidnplayr | 638 | je sw_exit |
261 | hidnplayr | 639 | |
640 | ; Save the queue entry number |
||
641 | push eax |
||
642 | |||
643 | ; save the pointers to the data buffer & size |
||
644 | push edx |
||
645 | push ecx |
||
646 | |||
647 | ; convert buffer pointer eax to the absolute address |
||
648 | mov ecx, IPBUFFSIZE |
||
649 | mul ecx |
||
650 | add eax, IPbuffs |
||
651 | |||
652 | mov edx, eax |
||
653 | |||
654 | ; So, ebx holds the socket ptr, edx holds the IPbuffer ptr |
||
655 | |||
656 | ; Fill in the IP header ( some data is in the socket descriptor) |
||
657 | mov eax, [ebx + 8] |
||
323 | hidnplayr | 658 | mov [edx + 12], eax ; source IP |
261 | hidnplayr | 659 | mov eax, [ebx + 16] |
323 | hidnplayr | 660 | mov [edx + 16], eax ; Destination IP |
261 | hidnplayr | 661 | |
662 | mov al, 0x45 |
||
323 | hidnplayr | 663 | mov [edx], al ; Version, IHL |
261 | hidnplayr | 664 | xor al, al |
665 | mov [edx + 1], al ; Type of service |
||
666 | |||
323 | hidnplayr | 667 | pop eax ; Get the UDP data length |
261 | hidnplayr | 668 | push eax |
669 | |||
323 | hidnplayr | 670 | add eax, 20 + 8 ; add IP header and UDP header lengths |
261 | hidnplayr | 671 | mov [edx + 2], ah |
672 | mov [edx + 3], al |
||
673 | xor al, al |
||
674 | mov [edx + 4], al |
||
675 | mov [edx + 5], al |
||
676 | mov al, 0x40 |
||
677 | mov [edx + 6], al |
||
678 | xor al, al |
||
679 | mov [edx + 7], al |
||
680 | mov al, 0x20 |
||
681 | mov [edx + 8], al |
||
682 | mov al, 17 |
||
683 | mov [edx + 9], al |
||
684 | |||
685 | ; Checksum left unfilled |
||
686 | xor ax, ax |
||
687 | mov [edx + 10], ax |
||
688 | |||
689 | ; Fill in the UDP header ( some data is in the socket descriptor) |
||
690 | mov ax, [ebx + 12] |
||
691 | mov [edx + 20], ax |
||
692 | |||
693 | mov ax, [ebx + 20] |
||
694 | mov [edx + 20 + 2], ax |
||
695 | |||
696 | pop eax |
||
697 | push eax |
||
698 | |||
699 | add eax, 8 |
||
700 | mov [edx + 20 + 4], ah |
||
701 | mov [edx + 20 + 5], al |
||
702 | |||
703 | ; Checksum left unfilled |
||
704 | xor ax, ax |
||
705 | mov [edx + 20 + 6], ax |
||
706 | |||
323 | hidnplayr | 707 | pop ecx ; count of bytes to send |
708 | mov ebx, ecx ; need the length later |
||
709 | pop eax ; get callers ptr to data to send |
||
261 | hidnplayr | 710 | |
711 | ; Get the address of the callers data |
||
379 | serge | 712 | mov edi, [TASK_BASE] |
261 | hidnplayr | 713 | add edi, TASKDATA.mem_start |
714 | add eax, [edi] |
||
715 | mov esi, eax |
||
716 | |||
717 | mov edi, edx |
||
718 | add edi, 28 |
||
719 | cld |
||
323 | hidnplayr | 720 | rep movsb ; copy the data across |
261 | hidnplayr | 721 | |
722 | ; we have edx as IPbuffer ptr. |
||
723 | ; Fill in the UDP checksum |
||
724 | ; First, fill in pseudoheader |
||
725 | mov eax, [edx + 12] |
||
726 | mov [pseudoHeader], eax |
||
727 | mov eax, [edx + 16] |
||
728 | mov [pseudoHeader+4], eax |
||
323 | hidnplayr | 729 | mov ax, 0x1100 ; 0 + protocol |
261 | hidnplayr | 730 | mov [pseudoHeader+8], ax |
731 | add ebx, 8 |
||
732 | mov eax, ebx |
||
733 | mov [pseudoHeader+10], ah |
||
734 | mov [pseudoHeader+11], al |
||
735 | |||
736 | mov eax, pseudoHeader |
||
737 | mov [checkAdd1], eax |
||
738 | mov [checkSize1], word 12 |
||
739 | mov eax, edx |
||
740 | add eax, 20 |
||
741 | mov [checkAdd2], eax |
||
742 | mov eax, ebx |
||
323 | hidnplayr | 743 | mov [checkSize2], ax ; was eax!! mjh 8/7/02 |
261 | hidnplayr | 744 | |
745 | call checksum |
||
746 | |||
747 | ; store it in the UDP checksum ( in the correct order! ) |
||
748 | mov ax, [checkResult] |
||
749 | |||
750 | ; If the UDP checksum computes to 0, we must make it 0xffff |
||
751 | ; (0 is reserved for 'not used') |
||
752 | cmp ax, 0 |
||
753 | jne sw_001 |
||
754 | mov ax, 0xffff |
||
755 | |||
756 | sw_001: |
||
757 | mov [edx + 20 + 6], ah |
||
758 | mov [edx + 20 + 7], al |
||
759 | |||
760 | ; Fill in the IP header checksum |
||
323 | hidnplayr | 761 | GET_IHL ecx,edx ; get IP-Header length |
261 | hidnplayr | 762 | stdcall checksum_jb,edx,ecx ; buf_ptr, buf_size |
763 | |||
764 | mov [edx + 10], ah |
||
765 | mov [edx + 11], al |
||
766 | |||
767 | ; Check destination IP address. |
||
768 | ; If it is the local host IP, route it back to IP_RX |
||
769 | |||
770 | pop ebx |
||
771 | mov eax, NET1OUT_QUEUE |
||
772 | |||
773 | mov ecx, [ edx + 16] |
||
774 | mov edx, [stack_ip] |
||
775 | cmp edx, ecx |
||
776 | jne sw_notlocal |
||
777 | mov eax, IPIN_QUEUE |
||
778 | |||
779 | sw_notlocal: |
||
780 | ; Send it. |
||
781 | call queue |
||
782 | |||
783 | xor eax, eax |
||
784 | |||
785 | sw_exit: |
||
786 | ret |
||
787 | |||
788 | |||
789 | |||
790 | ;*************************************************************************** |
||
791 | ; Function |
||
792 | ; socket_write_tcp |
||
793 | ; |
||
794 | ; Description |
||
795 | ; socket in ebx |
||
796 | ; # of bytes to write in ecx |
||
797 | ; pointer to data in edx |
||
798 | ; returns 0 in eax ok, -1 == failed ( invalid socket, or |
||
799 | ; could not queue IP packet ) |
||
800 | ; |
||
801 | ;*************************************************************************** |
||
802 | socket_write_tcp: |
||
803 | Index2RealAddr ebx |
||
804 | |||
805 | mov [sktAddr], ebx |
||
806 | |||
807 | mov eax, 0xFFFFFFFF |
||
808 | ; If the socket is invalid, return with an error code |
||
809 | cmp [ebx], dword SOCK_EMPTY |
||
323 | hidnplayr | 810 | je swt_exit |
261 | hidnplayr | 811 | |
812 | ; If the sockets window timer is nonzero, do not queue packet |
||
813 | ; TODO - done |
||
814 | cmp [ebx + SOCKET.wndsizeTimer], dword 0 |
||
815 | jne swt_exit |
||
816 | |||
817 | mov eax, EMPTY_QUEUE |
||
818 | call dequeue |
||
819 | cmp ax, NO_BUFFER |
||
323 | hidnplayr | 820 | je swt_exit |
261 | hidnplayr | 821 | |
822 | push eax |
||
823 | |||
323 | hidnplayr | 824 | mov bl, 0x10 ; ACK |
261 | hidnplayr | 825 | |
826 | ; Get the address of the callers data |
||
379 | serge | 827 | mov edi, [TASK_BASE] |
261 | hidnplayr | 828 | add edi, TASKDATA.mem_start |
829 | add edx, [edi] |
||
830 | mov esi, edx |
||
831 | |||
832 | pop eax |
||
833 | push eax |
||
834 | |||
835 | push ecx |
||
836 | call buildTCPPacket |
||
837 | pop ecx |
||
838 | |||
839 | ; Check destination IP address. |
||
840 | ; If it is the local host IP, route it back to IP_RX |
||
841 | |||
842 | pop ebx |
||
843 | push ecx |
||
844 | mov eax, NET1OUT_QUEUE |
||
845 | |||
846 | mov edx, [stack_ip] |
||
847 | mov ecx, [sktAddr ] |
||
848 | mov ecx, [ecx + 16] |
||
849 | cmp edx, ecx |
||
850 | jne swt_notlocal |
||
851 | mov eax, IPIN_QUEUE |
||
852 | |||
853 | swt_notlocal: |
||
854 | pop ecx |
||
855 | |||
323 | hidnplayr | 856 | push ebx ; save ipbuffer number |
261 | hidnplayr | 857 | |
858 | call queue |
||
859 | |||
860 | mov esi, [sktAddr] |
||
861 | |||
862 | ; increament SND.NXT in socket |
||
863 | ; Amount to increment by is in ecx |
||
864 | add esi, 48 |
||
865 | call add_inet_esi |
||
866 | |||
867 | pop ebx |
||
868 | |||
869 | ; Copy the IP buffer to a resend queue |
||
870 | ; If there isn't one, dont worry about it for now |
||
871 | mov esi, resendQ |
||
872 | mov ecx, 0 |
||
873 | |||
874 | swt003: |
||
875 | cmp ecx, NUMRESENDENTRIES |
||
323 | hidnplayr | 876 | je swt001 ; None found |
261 | hidnplayr | 877 | cmp [esi], byte 0xFF |
323 | hidnplayr | 878 | je swt002 ; found one |
261 | hidnplayr | 879 | inc ecx |
880 | add esi, 4 |
||
881 | jmp swt003 |
||
882 | |||
883 | swt002: |
||
884 | push ebx |
||
885 | |||
886 | ; OK, we have a buffer descriptor ptr in esi. |
||
887 | ; resend entry # in ecx |
||
888 | ; Populate it |
||
889 | ; socket # |
||
890 | ; retries count |
||
891 | ; retry time |
||
892 | ; fill IP buffer associated with this descriptor |
||
893 | |||
894 | mov eax, [sktAddr] |
||
895 | sub eax, sockets |
||
323 | hidnplayr | 896 | shr eax, 12 ; get skt # |
261 | hidnplayr | 897 | mov [esi], al |
898 | mov [esi + 1], byte TCP_RETRIES |
||
899 | mov [esi + 2], word TCP_TIMEOUT |
||
900 | |||
901 | inc ecx |
||
902 | ; Now get buffer location, and copy buffer across. argh! more copying,, |
||
903 | mov edi, resendBuffer - IPBUFFSIZE |
||
904 | swt002a: |
||
905 | add edi, IPBUFFSIZE |
||
906 | loop swt002a |
||
907 | |||
908 | ; we have dest buffer location in edi |
||
909 | pop eax |
||
910 | ; convert source buffer pointer eax to the absolute address |
||
911 | mov ecx, IPBUFFSIZE |
||
912 | mul ecx |
||
913 | add eax, IPbuffs |
||
914 | mov esi, eax |
||
915 | |||
916 | ; do copy |
||
917 | mov ecx, IPBUFFSIZE |
||
918 | cld |
||
919 | rep movsb |
||
920 | |||
921 | swt001: |
||
922 | xor eax, eax |
||
923 | |||
924 | swt_exit: |
||
925 | ret |
||
926 |