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Rev | Author | Line No. | Line |
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425 | victor | 1 | $Revision: 425 $ |
261 | hidnplayr | 2 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
3 | ;; |
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4 | ;; SOCKET.INC |
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5 | ;; |
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6 | ;; Sockets constants, structures and functions |
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7 | ;; |
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8 | ;; Last revision: 11.11.2006 |
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9 | ;; |
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10 | ;; This file contains the following: |
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11 | ;; is_localport_unused |
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12 | ;; get_free_socket |
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13 | ;; socket_open |
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14 | ;; socket_open_tcp |
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15 | ;; socket_close |
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16 | ;; socket_close_tcp |
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17 | ;; socket_poll |
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18 | ;; socket_status |
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19 | ;; socket_read |
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20 | ;; socket_write |
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21 | ;; socket_write_tcp |
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379 | serge | 22 | ;; |
23 | ;; |
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261 | hidnplayr | 24 | ;; Changes history: |
25 | ;; 22.09.2003 - [Mike Hibbett] : mikeh@oceanfree.net |
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26 | ;; 11.11.2006 - [Johnny_B] and [smb] |
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27 | ;; |
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28 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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29 | |||
30 | ; |
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31 | ; Socket Descriptor + Buffer |
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32 | ; |
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33 | ; 0 1 2 3 |
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34 | ; 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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35 | ; |
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36 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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37 | ; 0| Status ( of this buffer ) | |
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38 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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39 | ; 4| Application Process ID | |
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40 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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41 | ; 8| Local IP Address | |
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42 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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43 | ; 12| Local IP Port | Unused ( set to 0 ) | |
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44 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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45 | ; 16| Remote IP Address | |
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46 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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47 | ; 20| Remote IP Port | Unused ( set to 0 ) | |
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48 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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49 | ; 24| Rx Data Count INTEL format| |
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50 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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51 | ; 28| TCB STATE INTEL format| |
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52 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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53 | ; 32| TCB Timer (seconds) INTEL format| |
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54 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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55 | ; 36| ISS (Inital Sequence # used by this connection ) INET format| |
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56 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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57 | ; 40| IRS ( Inital Receive Sequence # ) INET format| |
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58 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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59 | ; 44| SND.UNA Seq # of unack'ed sent packets INET format| |
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60 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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61 | ; 48| SND.NXT Next send seq # to use INET format| |
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62 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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63 | ; 52| SND.WND Send window INET format| |
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64 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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65 | ; 56| RCV.NXT Next expected receive sequence # INET format| |
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66 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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67 | ; 60| RCV.WND Receive window INET format| |
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68 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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69 | ; 64| SEG.LEN Segment length INTEL format| |
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70 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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71 | ; 68| SEG.WND Segment window INTEL format| |
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72 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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73 | ; 72| Retransmit queue # NOW WINDOW SIZE TIMER INTEL format| |
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74 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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379 | serge | 75 | ; 76| RX offset from |
261 | hidnplayr | 76 | ; 76| RX Data | |
77 | ; +-+-+-.......... -+ |
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78 | |||
79 | |||
80 | ; so, define struct |
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81 | struc SOCKET |
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379 | serge | 82 | { .Status dd ? ;+00 - Status ( of this buffer ) |
83 | .PID dd ? ;+04 - Application Process ID |
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323 | hidnplayr | 84 | .LocalIP dd ? ;+08 - Local IP Address |
85 | .LocalPort dw ? ;+12 - Local Port |
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86 | .UnusedL dw ? ;+14 - may be removed in future |
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87 | .RemoteIP dd ? ;+16 - Remote IP Address |
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88 | .RemotePort dw ? ;+20 - Remote Port |
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89 | .UnusedR dw ? ;+22 - may be removed in future |
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90 | .rxDataCount dd ? ;+24 - Rx Data Count |
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91 | .TCBState dd ? ;+28 - TCB STATE |
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379 | serge | 92 | .TCBTimer dd ? ;+32 - TCB Timer (seconds) |
323 | hidnplayr | 93 | .ISS dd ? ;+36 - Initial Send Sequence |
94 | .IRS dd ? ;+40 - Initial Receive Sequence |
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95 | .SND_UNA dd ? ;+44 - Sequence number of unack'ed sent packets |
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379 | serge | 96 | .SND_NXT dd ? ;+48 - Next send sequence number to use |
323 | hidnplayr | 97 | .SND_WND dd ? ;+52 - Send window |
98 | .RCV_NXT dd ? ;+56 - Next receive sequence number to use |
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99 | .RCV_WND dd ? ;+60 - Receive window |
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100 | .SEG_LEN dd ? ;+64 - Segment length |
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101 | .SEG_WND dd ? ;+68 - Segment window |
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379 | serge | 102 | .wndsizeTimer dd ? ;+72 - Retransmit queue # NOW WINDOW SIZE TIMER |
323 | hidnplayr | 103 | .rxData dd ? ;+76 - receive data buffer here |
261 | hidnplayr | 104 | } |
105 | |||
106 | virtual at 0 |
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107 | SOCKET SOCKET |
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108 | end virtual |
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109 | |||
379 | serge | 110 | ; simple macro calcing real memory address of SOCKET struct by socket's |
261 | hidnplayr | 111 | macro Index2RealAddr reg |
112 | { |
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323 | hidnplayr | 113 | shl reg, 12 |
379 | serge | 114 | add reg, sockets |
261 | hidnplayr | 115 | } |
116 | |||
117 | ;Constants |
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118 | ; current socket statuses |
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323 | hidnplayr | 119 | SOCK_EMPTY equ 0 ; socket not in use |
120 | SOCK_OPEN equ 1 ; open issued, but no data sent |
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261 | hidnplayr | 121 | |
122 | ; TCP opening modes |
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323 | hidnplayr | 123 | SOCKET_PASSIVE equ 0 |
124 | SOCKET_ACTIVE equ 1 |
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261 | hidnplayr | 125 | |
126 | ;*************************************************************************** |
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127 | ; Function |
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128 | ; is_localport_unused |
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129 | ; |
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130 | ; Description |
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131 | ; scans through all the active sockets , looking to see if the |
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132 | ; port number specified in bx is in use as a localport number. |
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133 | ; This is useful when you want a to generate a unique local port |
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134 | ; number. |
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135 | ; On return, eax = 1 for free, 0 for in use |
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136 | ; |
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137 | ;*************************************************************************** |
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138 | is_localport_unused: |
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139 | mov al, bh |
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140 | mov ah, bl |
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141 | mov bx, ax |
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142 | |||
143 | mov edx, SOCKETBUFFSIZE * NUM_SOCKETS |
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144 | mov ecx, NUM_SOCKETS |
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323 | hidnplayr | 145 | mov eax, 0 ; Assume the return value is 'in use' |
261 | hidnplayr | 146 | |
147 | ilu1: |
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148 | sub edx, SOCKETBUFFSIZE |
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149 | cmp [edx + sockets + SOCKET.LocalPort], bx |
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323 | hidnplayr | 150 | loopnz ilu1 ; Return back if the socket is occupied |
261 | hidnplayr | 151 | |
323 | hidnplayr | 152 | jz ilu_exit |
153 | inc eax ; return port not in use |
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261 | hidnplayr | 154 | |
155 | ilu_exit: |
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156 | ret |
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157 | |||
158 | |||
159 | |||
160 | ;*************************************************************************** |
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161 | ; Function |
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162 | ; get_free_socket |
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163 | ; |
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164 | ; Description |
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165 | ; |
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166 | ;*************************************************************************** |
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167 | get_free_socket: |
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168 | push ecx |
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169 | mov eax, SOCKETBUFFSIZE * NUM_SOCKETS |
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170 | mov ecx, NUM_SOCKETS |
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171 | |||
172 | gfs1: |
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173 | sub eax, SOCKETBUFFSIZE |
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174 | cmp [eax + sockets + SOCKET.Status], dword SOCK_EMPTY |
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323 | hidnplayr | 175 | loopnz gfs1 ; Return back if the socket is occupied |
261 | hidnplayr | 176 | mov eax, ecx |
177 | pop ecx |
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323 | hidnplayr | 178 | jz gfs_exit |
261 | hidnplayr | 179 | mov eax, 0xFFFFFFFF |
180 | |||
181 | gfs_exit: |
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182 | ret |
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183 | |||
184 | |||
185 | ;*************************************************************************** |
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186 | ; Function |
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187 | ; socket_open |
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188 | ; |
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189 | ; Description |
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190 | ; find a free socket |
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191 | ; local port in ebx |
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192 | ; remote port in ecx |
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193 | ; remote ip in edx |
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194 | ; return socket # in eax, -1 if none available |
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195 | ; |
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196 | ;*************************************************************************** |
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197 | socket_open: |
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198 | call get_free_socket |
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199 | |||
200 | cmp eax, 0xFFFFFFFF |
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323 | hidnplayr | 201 | jz so_exit |
261 | hidnplayr | 202 | |
203 | ; ax holds the socket number that is free. Get real address |
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204 | push eax |
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205 | Index2RealAddr eax |
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206 | |||
207 | mov [eax + SOCKET.Status], dword SOCK_OPEN |
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208 | |||
323 | hidnplayr | 209 | xchg bh, bl |
210 | mov [eax + SOCKET.LocalPort], bx |
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211 | xchg ch, cl |
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212 | mov [eax + SOCKET.RemotePort], cx |
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261 | hidnplayr | 213 | |
214 | mov ebx, [stack_ip] |
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379 | serge | 215 | mov [eax + SOCKET.LocalIP], ebx |
216 | mov [eax + SOCKET.RemoteIP], edx |
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261 | hidnplayr | 217 | mov [eax + SOCKET.rxDataCount], dword 0 ; recieved data count |
218 | |||
379 | serge | 219 | mov esi, [TASK_BASE] |
261 | hidnplayr | 220 | mov ebx, [esi+TASKDATA.pid] |
323 | hidnplayr | 221 | mov [eax + SOCKET.PID], ebx ; save the process ID |
261 | hidnplayr | 222 | pop eax ; Get the socket number back, so we can return it |
223 | |||
224 | so_exit: |
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225 | ret |
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226 | |||
227 | |||
228 | |||
229 | ;*************************************************************************** |
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230 | ; Function |
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231 | ; socket_open_tcp |
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232 | ; |
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233 | ; Description |
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234 | ; Opens a TCP socket in PASSIVE or ACTIVE mode |
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235 | ; find a free socket |
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236 | ; local port in ebx ( intel format ) |
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237 | ; remote port in ecx ( intel format ) |
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238 | ; remote ip in edx ( in Internet byte order ) |
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239 | ; Socket open mode in esi ( SOCKET_PASSIVE or SOCKET_ACTIVE ) |
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240 | ; return socket # in eax, -1 if none available |
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241 | ; |
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242 | ;*************************************************************************** |
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243 | socket_open_tcp: |
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244 | call get_free_socket |
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245 | |||
246 | cmp eax, 0xFFFFFFFF |
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323 | hidnplayr | 247 | jz so_exit |
261 | hidnplayr | 248 | |
249 | ; ax holds the socket number that is free. Get real address |
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250 | push eax |
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251 | Index2RealAddr eax |
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252 | |||
253 | mov [sktAddr], eax |
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254 | mov [eax], dword SOCK_OPEN |
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255 | |||
256 | ; TODO - check this works! |
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257 | mov [eax + SOCKET.wndsizeTimer], dword 0 ; Reset the window timer. |
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258 | |||
323 | hidnplayr | 259 | xchg bh, bl |
379 | serge | 260 | mov [eax + SOCKET.LocalPort], bx |
261 | hidnplayr | 261 | ; mov [eax + 12], byte bh ; Local port ( LS 16 bits ) |
262 | ; mov [eax + 13], byte bl ; Local port ( LS 16 bits ) |
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263 | |||
323 | hidnplayr | 264 | xchg ch, cl |
379 | serge | 265 | mov [eax + SOCKET.RemotePort], cx |
261 | hidnplayr | 266 | ; mov [eax + 20], ch ; Remote Port ( LS 16 bits ) |
267 | ; mov [eax + 21], cl ; Remote Port ( LS 16 bits ) |
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268 | |||
269 | mov ebx, [stack_ip] |
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379 | serge | 270 | mov [eax + SOCKET.LocalIP], ebx |
271 | mov [eax + SOCKET.RemoteIP], edx |
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272 | mov [eax + SOCKET.rxDataCount], dword 0 |
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261 | hidnplayr | 273 | |
274 | ; Now fill in TCB state |
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275 | mov ebx, TCB_LISTEN |
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276 | cmp esi, SOCKET_PASSIVE |
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323 | hidnplayr | 277 | jz sot_001 |
261 | hidnplayr | 278 | mov ebx, TCB_SYN_SENT |
279 | |||
280 | sot_001: |
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323 | hidnplayr | 281 | mov [eax + SOCKET.TCBState], ebx ; Indicate the state of the TCB |
261 | hidnplayr | 282 | |
379 | serge | 283 | mov esi, [TASK_BASE] |
261 | hidnplayr | 284 | mov ecx, [esi+TASKDATA.pid] |
323 | hidnplayr | 285 | mov [eax + SOCKET.PID], ecx ; save the process ID |
261 | hidnplayr | 286 | |
287 | cmp ebx, TCB_LISTEN |
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323 | hidnplayr | 288 | je sot_done |
261 | hidnplayr | 289 | |
290 | ; Now, if we are in active mode, then we have to send a SYN to the specified remote port |
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291 | mov eax, EMPTY_QUEUE |
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292 | call dequeue |
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293 | cmp ax, NO_BUFFER |
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323 | hidnplayr | 294 | je sot_done |
261 | hidnplayr | 295 | |
296 | push eax |
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297 | |||
323 | hidnplayr | 298 | mov bl, 0x02 ; SYN |
261 | hidnplayr | 299 | mov ecx, 0 |
300 | |||
301 | call buildTCPPacket |
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302 | |||
303 | mov eax, NET1OUT_QUEUE |
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304 | |||
305 | mov edx, [stack_ip] |
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306 | mov ecx, [sktAddr ] |
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307 | mov ecx, [ecx + 16] |
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308 | cmp edx, ecx |
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309 | jne sot_notlocal |
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310 | mov eax, IPIN_QUEUE |
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311 | |||
312 | sot_notlocal: |
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313 | ; Send it. |
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314 | pop ebx |
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315 | call queue |
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316 | |||
317 | mov esi, [sktAddr] |
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318 | |||
319 | ; increment SND.NXT in socket |
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320 | add esi, 48 |
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321 | call inc_inet_esi |
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322 | |||
323 | sot_done: |
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324 | pop eax ; Get the socket number back, so we can return it |
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325 | |||
326 | sot_exit: |
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327 | ret |
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328 | |||
329 | |||
330 | |||
331 | ;*************************************************************************** |
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332 | ; Function |
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333 | ; socket_close |
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334 | ; |
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335 | ; Description |
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336 | ; socket # in ebx |
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337 | ; returns 0 for ok, -1 for socket not open (fail) |
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338 | ; |
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339 | ;*************************************************************************** |
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340 | socket_close: |
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341 | Index2RealAddr ebx |
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323 | hidnplayr | 342 | mov eax, 0xFFFFFFFF ; assume this operation will fail.. |
261 | hidnplayr | 343 | cmp [ebx + SOCKET.Status], dword SOCK_EMPTY |
323 | hidnplayr | 344 | jz sc_exit |
261 | hidnplayr | 345 | |
346 | ; Clear the socket varaibles |
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347 | xor eax, eax |
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348 | mov edi, ebx |
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349 | mov ecx, SOCKETHEADERSIZE |
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350 | cld |
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351 | rep stosb |
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352 | |||
353 | sc_exit: |
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354 | ret |
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355 | |||
356 | |||
357 | |||
358 | ;*************************************************************************** |
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359 | ; Function |
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360 | ; socket_close_tcp |
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361 | ; |
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362 | ; Description |
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363 | ; socket # in ebx |
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364 | ; returns 0 for ok, -1 for socket not open (fail) |
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365 | ; |
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366 | ;*************************************************************************** |
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367 | socket_close_tcp: |
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368 | ; first, remove any resend entries |
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369 | pusha |
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370 | |||
371 | mov esi, resendQ |
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372 | mov ecx, 0 |
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373 | |||
374 | sct001: |
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375 | cmp ecx, NUMRESENDENTRIES |
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323 | hidnplayr | 376 | je sct003 ; None left |
261 | hidnplayr | 377 | cmp [esi], bl |
323 | hidnplayr | 378 | je sct002 ; found one |
261 | hidnplayr | 379 | inc ecx |
380 | add esi, 4 |
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381 | jmp sct001 |
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382 | |||
383 | sct002: |
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384 | |||
385 | mov [esi], byte 0xFF |
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386 | jmp sct001 |
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387 | |||
388 | sct003: |
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389 | popa |
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390 | |||
391 | Index2RealAddr ebx |
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392 | mov [sktAddr], ebx |
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323 | hidnplayr | 393 | mov eax, 0xFFFFFFFF ; assume this operation will fail.. |
261 | hidnplayr | 394 | cmp [ebx + SOCKET.Status], dword SOCK_EMPTY |
323 | hidnplayr | 395 | jz sct_exit |
261 | hidnplayr | 396 | |
397 | ; Now construct the response, and queue for sending by IP |
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398 | mov eax, EMPTY_QUEUE |
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399 | call dequeue |
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400 | cmp ax, NO_BUFFER |
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323 | hidnplayr | 401 | je stl_exit |
261 | hidnplayr | 402 | |
403 | push eax |
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404 | |||
323 | hidnplayr | 405 | mov bl, 0x11 ; FIN + ACK |
261 | hidnplayr | 406 | mov ecx, 0 |
407 | mov esi, 0 |
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408 | |||
409 | call buildTCPPacket |
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410 | |||
411 | mov ebx, [sktAddr] |
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412 | |||
413 | ; increament SND.NXT in socket |
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414 | mov esi, 48 |
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415 | add esi, ebx |
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416 | call inc_inet_esi |
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417 | |||
418 | |||
419 | ; Get the socket state |
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420 | mov eax, [ebx + SOCKET.TCBState] |
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421 | cmp eax, TCB_LISTEN |
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323 | hidnplayr | 422 | je destroyTCB |
261 | hidnplayr | 423 | cmp eax, TCB_SYN_SENT |
323 | hidnplayr | 424 | je destroyTCB |
261 | hidnplayr | 425 | cmp eax, TCB_SYN_RECEIVED |
323 | hidnplayr | 426 | je sct_finwait1 |
261 | hidnplayr | 427 | cmp eax, TCB_ESTABLISHED |
323 | hidnplayr | 428 | je sct_finwait1 |
261 | hidnplayr | 429 | |
430 | ; assume CLOSE WAIT |
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431 | ; Send a fin, then enter last-ack state |
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432 | mov eax, TCB_LAST_ACK |
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433 | mov [ebx + SOCKET.TCBState], eax |
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434 | xor eax, eax |
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435 | jmp sct_send |
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436 | |||
437 | sct_finwait1: |
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438 | ; Send a fin, then enter finwait2 state |
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439 | mov eax, TCB_FIN_WAIT_1 |
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440 | mov [ebx + SOCKET.TCBState], eax |
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441 | xor eax, eax |
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442 | |||
443 | sct_send: |
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444 | mov eax, NET1OUT_QUEUE |
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445 | |||
446 | mov edx, [stack_ip] |
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447 | mov ecx, [sktAddr ] |
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448 | mov ecx, [ecx + 16] |
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449 | cmp edx, ecx |
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450 | jne sct_notlocal |
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451 | mov eax, IPIN_QUEUE |
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452 | |||
453 | sct_notlocal: |
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454 | ; Send it. |
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455 | pop ebx |
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456 | call queue |
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457 | jmp sct_exit |
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458 | |||
459 | destroyTCB: |
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460 | pop eax |
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461 | ; Clear the socket varaibles |
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462 | xor eax, eax |
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463 | mov edi, ebx |
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464 | mov ecx, SOCKETHEADERSIZE |
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465 | cld |
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466 | rep stosb |
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467 | |||
468 | sct_exit: |
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469 | ret |
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470 | |||
471 | |||
472 | |||
473 | ;*************************************************************************** |
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474 | ; Function |
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475 | ; socket_poll |
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476 | ; |
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477 | ; Description |
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478 | ; socket # in ebx |
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479 | ; returns count in eax. |
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480 | ; |
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481 | ;*************************************************************************** |
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482 | socket_poll: |
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483 | Index2RealAddr ebx |
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484 | mov eax, [ebx + SOCKET.rxDataCount] |
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485 | |||
486 | ret |
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487 | |||
488 | |||
489 | |||
490 | ;*************************************************************************** |
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491 | ; Function |
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492 | ; socket_status |
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493 | ; |
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494 | ; Description |
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495 | ; socket # in ebx |
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496 | ; returns TCB state in eax. |
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497 | ; |
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498 | ;*************************************************************************** |
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499 | socket_status: |
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500 | Index2RealAddr ebx |
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501 | mov eax, [ebx + SOCKET.TCBState] |
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502 | |||
503 | ret |
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504 | |||
505 | |||
506 | |||
507 | ;*************************************************************************** |
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508 | ; Function |
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509 | ; socket_read |
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510 | ; |
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511 | ; Description |
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512 | ; socket # in ebx |
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513 | ; returns # of bytes remaining in eax, data in bl |
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514 | ; |
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515 | ;*************************************************************************** |
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516 | socket_read: |
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517 | Index2RealAddr ebx |
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323 | hidnplayr | 518 | mov eax, [ebx + SOCKET.rxDataCount] ; get count of bytes |
261 | hidnplayr | 519 | mov ecx, 1 |
520 | test eax, eax |
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323 | hidnplayr | 521 | jz sr2 |
261 | hidnplayr | 522 | |
523 | dec eax |
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323 | hidnplayr | 524 | mov esi, ebx ; esi is address of socket |
525 | mov [ebx + SOCKET.rxDataCount], eax ; store new count |
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261 | hidnplayr | 526 | ;movzx ebx, byte [ebx + SOCKET.rxData] ; get the byte |
323 | hidnplayr | 527 | movzx ebx, byte [ebx + SOCKETHEADERSIZE] ; get the byte |
261 | hidnplayr | 528 | add esi, SOCKETHEADERSIZE |
529 | mov edi, esi |
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530 | inc esi |
||
531 | |||
532 | mov ecx, (SOCKETBUFFSIZE - SOCKETHEADERSIZE) / 4 |
||
533 | cld |
||
534 | rep movsd |
||
535 | xor ecx, ecx |
||
536 | |||
537 | sr1: |
||
538 | jmp sor_exit |
||
539 | |||
540 | sr2: |
||
541 | xor bl, bl |
||
542 | |||
543 | sor_exit: |
||
544 | ret |
||
545 | |||
546 | |||
323 | hidnplayr | 547 | ;*************************************************************************** |
548 | ; Function |
||
549 | ; socket_read_packet |
||
550 | ; |
||
551 | ; Description |
||
552 | ; socket # in ebx |
||
553 | ; datapointer # in ecx |
||
554 | ; buffer size in edx |
||
555 | ; returns # of bytes copied in eax |
||
556 | ; |
||
557 | ;*************************************************************************** |
||
558 | socket_read_packet: |
||
559 | Index2RealAddr ebx ; get real socket address |
||
560 | mov eax, [ebx + SOCKET.rxDataCount] ; get count of bytes |
||
561 | test eax, eax ; if count of bytes is zero.. |
||
562 | jz .exit ; exit function (eax will be zero) |
||
261 | hidnplayr | 563 | |
323 | hidnplayr | 564 | test edx, edx ; if buffer size is zero, copy all data |
565 | jz .copyallbytes |
||
566 | cmp edx, eax ; if buffer size is larger then the bytes of data, copy all data |
||
567 | jge .copyallbytes |
||
568 | |||
569 | sub eax, edx ; store new count (data bytes in buffer - bytes we're about to copy) |
||
570 | mov [ebx + SOCKET.rxDataCount], eax ; |
||
571 | push eax |
||
572 | mov eax, edx ; number of bytes we want to copy must be in eax |
||
573 | call .startcopy ; copy to the application |
||
574 | |||
575 | mov esi, ebx ; now we're going to copy the remaining bytes to the beginning |
||
576 | add esi, SOCKETHEADERSIZE ; we dont need to copy the header |
||
577 | mov edi, esi ; edi is where we're going to copy to |
||
578 | add esi, edx ; esi is from where we copy |
||
579 | pop ecx ; count of bytes we have left |
||
580 | push ecx ; push it again so we can re-use it later |
||
581 | shr ecx, 2 ; divide eax by 4 |
||
582 | cld |
||
583 | rep movsd ; copy all full dwords |
||
584 | pop ecx |
||
585 | and ecx, 3 |
||
586 | rep movsb ; copy remaining bytes |
||
587 | |||
588 | ret ; at last, exit |
||
589 | |||
590 | .copyallbytes: |
||
591 | xor esi, esi |
||
592 | mov [ebx + SOCKET.rxDataCount], esi ; store new count (zero) |
||
593 | |||
594 | .startcopy: |
||
595 | mov edi, ecx ; |
||
596 | add edi, std_application_base_address ; get data pointer to buffer in application |
||
597 | |||
598 | mov esi, ebx ; |
||
599 | add esi, SOCKETHEADERSIZE ; we dont need to copy the header |
||
600 | mov ecx, eax ; eax is count of bytes |
||
601 | push ecx |
||
602 | shr ecx, 2 ; divide eax by 4 |
||
603 | cld ; copy all full dwords |
||
604 | rep movsd ; |
||
605 | pop ecx |
||
606 | and ecx, 3 |
||
607 | rep movsb ; copy the rest bytes |
||
608 | |||
609 | .exit: |
||
610 | ret ; exit, or go back to shift remaining bytes if any |
||
611 | |||
612 | |||
613 | |||
614 | |||
261 | hidnplayr | 615 | ;*************************************************************************** |
616 | ; Function |
||
617 | ; socket_write |
||
618 | ; |
||
619 | ; Description |
||
620 | ; socket in ebx |
||
621 | ; # of bytes to write in ecx |
||
622 | ; pointer to data in edx |
||
623 | ; returns 0 in eax ok, -1 == failed ( invalid socket, or |
||
624 | ; could not queue IP packet ) |
||
625 | ; |
||
626 | ;*************************************************************************** |
||
627 | socket_write: |
||
628 | Index2RealAddr ebx |
||
629 | |||
630 | mov eax, 0xFFFFFFFF |
||
631 | ; If the socket is invalid, return with an error code |
||
632 | cmp [ebx], dword SOCK_EMPTY |
||
323 | hidnplayr | 633 | je sw_exit |
261 | hidnplayr | 634 | |
635 | |||
636 | mov eax, EMPTY_QUEUE |
||
637 | call dequeue |
||
638 | cmp ax, NO_BUFFER |
||
323 | hidnplayr | 639 | je sw_exit |
261 | hidnplayr | 640 | |
641 | ; Save the queue entry number |
||
642 | push eax |
||
643 | |||
644 | ; save the pointers to the data buffer & size |
||
645 | push edx |
||
646 | push ecx |
||
647 | |||
648 | ; convert buffer pointer eax to the absolute address |
||
649 | mov ecx, IPBUFFSIZE |
||
650 | mul ecx |
||
651 | add eax, IPbuffs |
||
652 | |||
653 | mov edx, eax |
||
654 | |||
655 | ; So, ebx holds the socket ptr, edx holds the IPbuffer ptr |
||
656 | |||
657 | ; Fill in the IP header ( some data is in the socket descriptor) |
||
658 | mov eax, [ebx + 8] |
||
323 | hidnplayr | 659 | mov [edx + 12], eax ; source IP |
261 | hidnplayr | 660 | mov eax, [ebx + 16] |
323 | hidnplayr | 661 | mov [edx + 16], eax ; Destination IP |
261 | hidnplayr | 662 | |
663 | mov al, 0x45 |
||
323 | hidnplayr | 664 | mov [edx], al ; Version, IHL |
261 | hidnplayr | 665 | xor al, al |
666 | mov [edx + 1], al ; Type of service |
||
667 | |||
323 | hidnplayr | 668 | pop eax ; Get the UDP data length |
261 | hidnplayr | 669 | push eax |
670 | |||
323 | hidnplayr | 671 | add eax, 20 + 8 ; add IP header and UDP header lengths |
261 | hidnplayr | 672 | mov [edx + 2], ah |
673 | mov [edx + 3], al |
||
674 | xor al, al |
||
675 | mov [edx + 4], al |
||
676 | mov [edx + 5], al |
||
677 | mov al, 0x40 |
||
678 | mov [edx + 6], al |
||
679 | xor al, al |
||
680 | mov [edx + 7], al |
||
681 | mov al, 0x20 |
||
682 | mov [edx + 8], al |
||
683 | mov al, 17 |
||
684 | mov [edx + 9], al |
||
685 | |||
686 | ; Checksum left unfilled |
||
687 | xor ax, ax |
||
688 | mov [edx + 10], ax |
||
689 | |||
690 | ; Fill in the UDP header ( some data is in the socket descriptor) |
||
691 | mov ax, [ebx + 12] |
||
692 | mov [edx + 20], ax |
||
693 | |||
694 | mov ax, [ebx + 20] |
||
695 | mov [edx + 20 + 2], ax |
||
696 | |||
697 | pop eax |
||
698 | push eax |
||
699 | |||
700 | add eax, 8 |
||
701 | mov [edx + 20 + 4], ah |
||
702 | mov [edx + 20 + 5], al |
||
703 | |||
704 | ; Checksum left unfilled |
||
705 | xor ax, ax |
||
706 | mov [edx + 20 + 6], ax |
||
707 | |||
323 | hidnplayr | 708 | pop ecx ; count of bytes to send |
709 | mov ebx, ecx ; need the length later |
||
710 | pop eax ; get callers ptr to data to send |
||
261 | hidnplayr | 711 | |
712 | ; Get the address of the callers data |
||
379 | serge | 713 | mov edi, [TASK_BASE] |
261 | hidnplayr | 714 | add edi, TASKDATA.mem_start |
715 | add eax, [edi] |
||
716 | mov esi, eax |
||
717 | |||
718 | mov edi, edx |
||
719 | add edi, 28 |
||
720 | cld |
||
323 | hidnplayr | 721 | rep movsb ; copy the data across |
261 | hidnplayr | 722 | |
723 | ; we have edx as IPbuffer ptr. |
||
724 | ; Fill in the UDP checksum |
||
725 | ; First, fill in pseudoheader |
||
726 | mov eax, [edx + 12] |
||
727 | mov [pseudoHeader], eax |
||
728 | mov eax, [edx + 16] |
||
729 | mov [pseudoHeader+4], eax |
||
323 | hidnplayr | 730 | mov ax, 0x1100 ; 0 + protocol |
261 | hidnplayr | 731 | mov [pseudoHeader+8], ax |
732 | add ebx, 8 |
||
733 | mov eax, ebx |
||
734 | mov [pseudoHeader+10], ah |
||
735 | mov [pseudoHeader+11], al |
||
736 | |||
737 | mov eax, pseudoHeader |
||
738 | mov [checkAdd1], eax |
||
739 | mov [checkSize1], word 12 |
||
740 | mov eax, edx |
||
741 | add eax, 20 |
||
742 | mov [checkAdd2], eax |
||
743 | mov eax, ebx |
||
323 | hidnplayr | 744 | mov [checkSize2], ax ; was eax!! mjh 8/7/02 |
261 | hidnplayr | 745 | |
746 | call checksum |
||
747 | |||
748 | ; store it in the UDP checksum ( in the correct order! ) |
||
749 | mov ax, [checkResult] |
||
750 | |||
751 | ; If the UDP checksum computes to 0, we must make it 0xffff |
||
752 | ; (0 is reserved for 'not used') |
||
753 | cmp ax, 0 |
||
754 | jne sw_001 |
||
755 | mov ax, 0xffff |
||
756 | |||
757 | sw_001: |
||
758 | mov [edx + 20 + 6], ah |
||
759 | mov [edx + 20 + 7], al |
||
760 | |||
761 | ; Fill in the IP header checksum |
||
323 | hidnplayr | 762 | GET_IHL ecx,edx ; get IP-Header length |
261 | hidnplayr | 763 | stdcall checksum_jb,edx,ecx ; buf_ptr, buf_size |
764 | |||
765 | mov [edx + 10], ah |
||
766 | mov [edx + 11], al |
||
767 | |||
768 | ; Check destination IP address. |
||
769 | ; If it is the local host IP, route it back to IP_RX |
||
770 | |||
771 | pop ebx |
||
772 | mov eax, NET1OUT_QUEUE |
||
773 | |||
774 | mov ecx, [ edx + 16] |
||
775 | mov edx, [stack_ip] |
||
776 | cmp edx, ecx |
||
777 | jne sw_notlocal |
||
778 | mov eax, IPIN_QUEUE |
||
779 | |||
780 | sw_notlocal: |
||
781 | ; Send it. |
||
782 | call queue |
||
783 | |||
784 | xor eax, eax |
||
785 | |||
786 | sw_exit: |
||
787 | ret |
||
788 | |||
789 | |||
790 | |||
791 | ;*************************************************************************** |
||
792 | ; Function |
||
793 | ; socket_write_tcp |
||
794 | ; |
||
795 | ; Description |
||
796 | ; socket in ebx |
||
797 | ; # of bytes to write in ecx |
||
798 | ; pointer to data in edx |
||
799 | ; returns 0 in eax ok, -1 == failed ( invalid socket, or |
||
800 | ; could not queue IP packet ) |
||
801 | ; |
||
802 | ;*************************************************************************** |
||
803 | socket_write_tcp: |
||
804 | Index2RealAddr ebx |
||
805 | |||
806 | mov [sktAddr], ebx |
||
807 | |||
808 | mov eax, 0xFFFFFFFF |
||
809 | ; If the socket is invalid, return with an error code |
||
810 | cmp [ebx], dword SOCK_EMPTY |
||
323 | hidnplayr | 811 | je swt_exit |
261 | hidnplayr | 812 | |
813 | ; If the sockets window timer is nonzero, do not queue packet |
||
814 | ; TODO - done |
||
815 | cmp [ebx + SOCKET.wndsizeTimer], dword 0 |
||
816 | jne swt_exit |
||
817 | |||
818 | mov eax, EMPTY_QUEUE |
||
819 | call dequeue |
||
820 | cmp ax, NO_BUFFER |
||
323 | hidnplayr | 821 | je swt_exit |
261 | hidnplayr | 822 | |
823 | push eax |
||
824 | |||
323 | hidnplayr | 825 | mov bl, 0x10 ; ACK |
261 | hidnplayr | 826 | |
827 | ; Get the address of the callers data |
||
379 | serge | 828 | mov edi, [TASK_BASE] |
261 | hidnplayr | 829 | add edi, TASKDATA.mem_start |
830 | add edx, [edi] |
||
831 | mov esi, edx |
||
832 | |||
833 | pop eax |
||
834 | push eax |
||
835 | |||
836 | push ecx |
||
837 | call buildTCPPacket |
||
838 | pop ecx |
||
839 | |||
840 | ; Check destination IP address. |
||
841 | ; If it is the local host IP, route it back to IP_RX |
||
842 | |||
843 | pop ebx |
||
844 | push ecx |
||
845 | mov eax, NET1OUT_QUEUE |
||
846 | |||
847 | mov edx, [stack_ip] |
||
848 | mov ecx, [sktAddr ] |
||
849 | mov ecx, [ecx + 16] |
||
850 | cmp edx, ecx |
||
851 | jne swt_notlocal |
||
852 | mov eax, IPIN_QUEUE |
||
853 | |||
854 | swt_notlocal: |
||
855 | pop ecx |
||
856 | |||
323 | hidnplayr | 857 | push ebx ; save ipbuffer number |
261 | hidnplayr | 858 | |
859 | call queue |
||
860 | |||
861 | mov esi, [sktAddr] |
||
862 | |||
863 | ; increament SND.NXT in socket |
||
864 | ; Amount to increment by is in ecx |
||
865 | add esi, 48 |
||
866 | call add_inet_esi |
||
867 | |||
868 | pop ebx |
||
869 | |||
870 | ; Copy the IP buffer to a resend queue |
||
871 | ; If there isn't one, dont worry about it for now |
||
872 | mov esi, resendQ |
||
873 | mov ecx, 0 |
||
874 | |||
875 | swt003: |
||
876 | cmp ecx, NUMRESENDENTRIES |
||
323 | hidnplayr | 877 | je swt001 ; None found |
261 | hidnplayr | 878 | cmp [esi], byte 0xFF |
323 | hidnplayr | 879 | je swt002 ; found one |
261 | hidnplayr | 880 | inc ecx |
881 | add esi, 4 |
||
882 | jmp swt003 |
||
883 | |||
884 | swt002: |
||
885 | push ebx |
||
886 | |||
887 | ; OK, we have a buffer descriptor ptr in esi. |
||
888 | ; resend entry # in ecx |
||
889 | ; Populate it |
||
890 | ; socket # |
||
891 | ; retries count |
||
892 | ; retry time |
||
893 | ; fill IP buffer associated with this descriptor |
||
894 | |||
895 | mov eax, [sktAddr] |
||
896 | sub eax, sockets |
||
323 | hidnplayr | 897 | shr eax, 12 ; get skt # |
261 | hidnplayr | 898 | mov [esi], al |
899 | mov [esi + 1], byte TCP_RETRIES |
||
900 | mov [esi + 2], word TCP_TIMEOUT |
||
901 | |||
902 | inc ecx |
||
903 | ; Now get buffer location, and copy buffer across. argh! more copying,, |
||
904 | mov edi, resendBuffer - IPBUFFSIZE |
||
905 | swt002a: |
||
906 | add edi, IPBUFFSIZE |
||
907 | loop swt002a |
||
908 | |||
909 | ; we have dest buffer location in edi |
||
910 | pop eax |
||
911 | ; convert source buffer pointer eax to the absolute address |
||
912 | mov ecx, IPBUFFSIZE |
||
913 | mul ecx |
||
914 | add eax, IPbuffs |
||
915 | mov esi, eax |
||
916 | |||
917 | ; do copy |
||
918 | mov ecx, IPBUFFSIZE |
||
919 | cld |
||
920 | rep movsb |
||
921 | |||
922 | swt001: |
||
923 | xor eax, eax |
||
924 | |||
925 | swt_exit: |
||
926 | ret |
||
927 |