src/server/util/netbuf.c

Sun, 06 Nov 2022 15:53:32 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 06 Nov 2022 15:53:32 +0100
changeset 415
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parent 330
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child 540
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permissions
-rw-r--r--

switch from ucx 2 to 3

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
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5 *
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6 * THE BSD LICENSE
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7 *
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8 * Redistribution and use in source and binary forms, with or without
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9 * modification, are permitted provided that the following conditions are met:
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10 *
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11 * Redistributions of source code must retain the above copyright notice, this
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12 * list of conditions and the following disclaimer.
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13 * Redistributions in binary form must reproduce the above copyright notice,
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14 * this list of conditions and the following disclaimer in the documentation
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15 * and/or other materials provided with the distribution.
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16 *
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17 * Neither the name of the nor the names of its contributors may be
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18 * used to endorse or promote products derived from this software without
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19 * specific prior written permission.
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20 *
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21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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25 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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32 */
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33
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34 /*
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35 * netbuf.c: Handles buffered I/O on network sockets
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36 *
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37 * Rob McCool
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38 */
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39
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40 #include <stdio.h>
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41 #include <stdlib.h>
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42 #include <unistd.h>
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43
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44 //include "nspr.h"
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45 #include "../public/nsapi.h"
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46 #include "io.h"
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47
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48 //include "buffer.h"
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49
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50
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51 #define NETBUF_RDTIMEOUT 120
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52
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53
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54 /* ----------------------------- netbuf_open ------------------------------ */
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55
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56
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57 NSAPI_PUBLIC netbuf *netbuf_open(SYS_NETFD sd, int sz) {
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58 netbuf *buf = (netbuf *) malloc(sizeof(netbuf));
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59
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60 buf->rdtimeout = NETBUF_RDTIMEOUT;
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61 buf->pos = sz;
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62 buf->cursize = sz; /* force buffer_next on first getc */
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63 buf->maxsize = sz;
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64 buf->sd = sd;
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65
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66 buf->inbuf = NULL;
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67 buf->errmsg = NULL;
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68
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69 return buf;
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70 }
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72
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73 /* ----------------------------- netbuf_close ----------------------------- */
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74
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75
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76 NSAPI_PUBLIC void netbuf_close(netbuf *buf) {
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77 if(buf->inbuf)
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78 free(buf->inbuf);
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79 free(buf);
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80 }
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81
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82
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83 /* ----------------------------- netbuf_replace --------------------------- */
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84
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85
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86 NSAPI_PUBLIC unsigned char * netbuf_replace(netbuf *buf,
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87 unsigned char *inbuf, int pos, int cursize, int maxsize)
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88 {
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89 unsigned char *oldbuf = buf->inbuf;
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90
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91 buf->inbuf = inbuf;
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92 buf->pos = pos;
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93 buf->cursize = cursize;
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94 buf->maxsize = maxsize;
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95
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96 return oldbuf;
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97 }
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98
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99
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100 /* ----------------------------- netbuf_next ------------------------------ */
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101
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102
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103 NSAPI_PUBLIC int netbuf_next(netbuf *buf, int advance) {
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104 int n;
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105
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106 if(!buf->inbuf)
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107 buf->inbuf = (unsigned char *) malloc(buf->maxsize);
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108
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109 while(1) {
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110 switch(n = net_read(buf->sd, (char *)(buf->inbuf), buf->maxsize)) {
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111 //case IO_EOF:
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112 case 0:
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113 return IO_EOF;
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114 case -1:
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115 return IO_ERROR;
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116 //case IO_ERROR:
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117 //buf->errmsg = system_errmsg();
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118 // return IO_ERROR;
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119 default:
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120 buf->pos = advance;
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121 buf->cursize = n;
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122 return buf->inbuf[0];
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123 }
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124 }
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125 }
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126
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127 NSAPI_PUBLIC int netbuf_getbytes(netbuf *buf, char *buffer, int size)
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128 {
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129 int bytes;
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130
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131 if (!buf->inbuf) {
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132 buf->inbuf = (unsigned char *) malloc(buf->maxsize);
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133 } else {
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134 if (buf->pos < buf->cursize) {
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135 int bytes_in_buffer = buf->cursize - buf->pos;
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136
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137 if (bytes_in_buffer > size)
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138 bytes_in_buffer = size;
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139
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140 memcpy(buffer, &(buf->inbuf[buf->pos]), bytes_in_buffer);
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141
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142 buf->pos += bytes_in_buffer;
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143 return bytes_in_buffer;
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144 } else if(buf->pos >= buf->maxsize) {
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145 return NETBUF_EOF;
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146 }
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147 }
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148
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149 if(!buf->sd) {
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150 return NETBUF_EOF;
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151 }
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152
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153 /* The netbuf is empty. Read data directly into the caller's buffer */
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154 bytes = net_read(buf->sd, buffer, size);
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155 if (bytes == 0)
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156 return NETBUF_EOF;
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157 if (bytes < 0) {
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158 //buf->errmsg = system_errmsg();
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159 return NETBUF_ERROR;
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160 }
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161 return bytes;
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162 }
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163
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164
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165 /* ----------------------------- netbuf_grab ------------------------------ */
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166
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167
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168 NSAPI_PUBLIC int netbuf_grab(netbuf *buf, int sz) {
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169 int n;
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170
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171 if(!buf->inbuf) {
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172 buf->inbuf = (unsigned char *) malloc(sz);
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173 buf->maxsize = sz;
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174 }
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175 else if(sz > buf->maxsize) {
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176 buf->inbuf = (unsigned char *) realloc(buf->inbuf, sz);
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177 buf->maxsize = sz;
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178 }
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179
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180 //PR_ASSERT(buf->pos == buf->cursize); // TODO
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181 buf->pos = 0;
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182 buf->cursize = 0;
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183
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184 while(1) {
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185 switch(n = net_read(buf->sd, (char *)(buf->inbuf), sz)) {
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186 case 0:
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187 return IO_EOF;
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188 case -1: {
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189 //buf->errmsg = system_errmsg();
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190 return IO_ERROR;
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191 }
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192 default:
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193 buf->cursize = n;
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194 return n;
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195 }
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196 }
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197 }

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