207 |
mateuszvis |
1 |
/*
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* pkgnet - pulls SvarDOS packages from the project's online repository
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* Copyright (C) 2021 Mateusz Viste
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*
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* PUBLISHED UNDER THE TERMS OF THE MIT LICENSE
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*
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* COPYRIGHT (C) 2016-2021 MATEUSZ VISTE, ALL RIGHTS RESERVED.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* http://svardos.osdn.io
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*/
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#include <stdio.h>
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209 |
mateuszvis |
31 |
#include <stdlib.h>
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207 |
mateuszvis |
32 |
#include <string.h>
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33 |
#include <time.h>
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34 |
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35 |
#include "net.h"
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342 |
mateuszvis |
36 |
#include "unchunk.h"
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207 |
mateuszvis |
37 |
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342 |
mateuszvis |
38 |
#define PVER "20210903"
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209 |
mateuszvis |
39 |
#define PDATE "2021"
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40 |
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207 |
mateuszvis |
41 |
#define HOSTADDR "svardos.osdn.io"
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42 |
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209 |
mateuszvis |
43 |
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338 |
mateuszvis |
44 |
/* returns length of all http headers, or 0 if uncomplete yet */
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45 |
static unsigned short detecthttpheadersend(const unsigned char *buff) {
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46 |
char lastbyteislf = 0;
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47 |
unsigned short i;
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48 |
for (i = 0; buff[i] != 0; i++) {
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207 |
mateuszvis |
49 |
if (buff[i] == '\r') continue; /* ignore CR characters */
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50 |
if (buff[i] != '\n') {
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51 |
lastbyteislf = 0;
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52 |
continue;
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53 |
}
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54 |
/* cur byte is LF -> if last one was also LF then this is an empty line, meaning headers are over */
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55 |
if (lastbyteislf == 0) {
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56 |
lastbyteislf = 1;
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57 |
continue;
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58 |
}
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338 |
mateuszvis |
59 |
/* end of headers! return length of headers */
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60 |
return(i + 1); /* add 1 to skip the current \n character */
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207 |
mateuszvis |
61 |
}
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62 |
return(0);
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63 |
}
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64 |
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65 |
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209 |
mateuszvis |
66 |
static void help(void) {
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67 |
puts("pkgnet ver " PVER " -- Copyright (C) " PDATE " Mateusz Viste");
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68 |
puts("");
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69 |
puts("pkgnet is the SvarDOS package downloader.");
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70 |
puts("");
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71 |
puts("usage: pkgnet search <term>");
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72 |
puts(" pkgnet pull <package>");
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211 |
mateuszvis |
73 |
puts(" pkgnet checkup");
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209 |
mateuszvis |
74 |
puts("");
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75 |
puts("actions:");
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76 |
puts(" search - asks remote repository for the list of matching packages");
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77 |
puts(" pull - downloads package into current directory");
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211 |
mateuszvis |
78 |
puts(" checkup - lists updates available for your system");
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209 |
mateuszvis |
79 |
puts("");
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342 |
mateuszvis |
80 |
printf("Watt32 kernel: %s", net_engine());
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81 |
puts("");
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puts("");
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209 |
mateuszvis |
83 |
}
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84 |
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85 |
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86 |
/* parses command line arguments and fills outfname and url accordingly
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87 |
* returns 0 on success, non-zero otherwise */
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mateuszvis |
88 |
static int parseargv(int argc, char * const *argv, char *outfname, char *url, int *ispost) {
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mateuszvis |
89 |
*outfname = 0;
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209 |
mateuszvis |
90 |
*url = 0;
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342 |
mateuszvis |
91 |
*ispost = 0;
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209 |
mateuszvis |
92 |
if ((argc == 3) && (strcasecmp(argv[1], "search") == 0)) {
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214 |
mateuszvis |
93 |
sprintf(url, "/repo/?a=search&p=%s", argv[2]);
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209 |
mateuszvis |
94 |
} else if ((argc == 3) && (strcasecmp(argv[1], "pull") == 0)) {
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211 |
mateuszvis |
95 |
if ((strlen(argv[2]) > 8) || (argv[2][0] == 0)) {
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96 |
puts("ERROR: package name must be 8 characters maximum");
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97 |
return(-1);
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98 |
}
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214 |
mateuszvis |
99 |
sprintf(url, "/repo/?a=pull&p=%s", argv[2]);
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211 |
mateuszvis |
100 |
sprintf(outfname, "%s.zip", argv[2]);
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209 |
mateuszvis |
101 |
} else if ((argc == 2) && (strcasecmp(argv[1], "checkup") == 0)) {
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342 |
mateuszvis |
102 |
sprintf(url, "/repo/?a=checkup");
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103 |
*ispost = 1;
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209 |
mateuszvis |
104 |
} else {
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105 |
help();
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106 |
return(-1);
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107 |
}
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108 |
return(0);
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109 |
}
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110 |
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111 |
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342 |
mateuszvis |
112 |
static int htget_headers(unsigned char *buffer, size_t buffersz, struct net_tcpsocket *sock, int *httpcode, int *ischunked) {
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338 |
mateuszvis |
113 |
unsigned char *buffptr = buffer;
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114 |
unsigned short bufflen = 0;
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115 |
int byteread;
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116 |
time_t starttime = time(NULL);
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117 |
for (;;) {
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118 |
byteread = net_recv(sock, buffptr, buffersz - (bufflen + 1)); /* -1 because I will append a NULL terminator */
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119 |
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120 |
if (byteread > 0) { /* got data */
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121 |
int hdlen;
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122 |
bufflen += byteread;
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123 |
buffptr += byteread;
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124 |
buffer[bufflen] = 0;
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125 |
hdlen = detecthttpheadersend(buffer);
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126 |
if (hdlen > 0) { /* full headers - parse http code and continue processing */
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342 |
mateuszvis |
127 |
int i;
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128 |
buffer[hdlen - 1] = 0;
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338 |
mateuszvis |
129 |
/* find the first space (HTTP/1.1 200 OK) */
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342 |
mateuszvis |
130 |
for (i = 0; i < 16; i++) {
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131 |
if ((buffer[i] == ' ') || (buffer[i] == 0)) break;
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338 |
mateuszvis |
132 |
}
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342 |
mateuszvis |
133 |
if (buffer[i] != ' ') return(-1);
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134 |
*httpcode = atoi((char *)(buffer + i + 1));
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135 |
/* switch all headers to low-case so it is easier to parse them */
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136 |
for (i = 0; i < hdlen; i++) if ((buffer[i] >= 'A') && (buffer[i] <= 'Z')) buffer[i] += ('a' - 'A');
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137 |
/* look out for chunked transfer encoding */
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138 |
{
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139 |
char *lineptr = strstr((char *)buffer, "\ntransfer-encoding:");
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140 |
if (lineptr != NULL) {
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141 |
lineptr += 19;
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142 |
/* replace nearest \r, \n or 0 by 0 */
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143 |
for (i = 0; ; i++) {
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144 |
if ((lineptr[i] == '\r') || (lineptr[i] == '\n') || (lineptr[i] == 0)) {
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145 |
lineptr[i] = 0;
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146 |
break;
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147 |
}
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148 |
}
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149 |
/* do I see the 'chunked' word? */
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150 |
if (strstr((char *)lineptr, "chunked") != NULL) *ischunked = 1;
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151 |
}
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152 |
}
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338 |
mateuszvis |
153 |
/* rewind the buffer */
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154 |
bufflen -= hdlen;
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155 |
memmove(buffer, buffer + hdlen, bufflen);
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156 |
return(bufflen); /* move to body processing now */
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157 |
}
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158 |
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159 |
} else if (byteread < 0) { /* abort on error */
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160 |
return(-2); /* unexpected end of connection (while waiting for all http headers) */
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161 |
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162 |
} else { /* else no data received - look for timeout and release a cpu cycle */
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163 |
if (time(NULL) - starttime > 20) return(-3); /* TIMEOUT! */
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164 |
_asm int 28h; /* release a CPU cycle */
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165 |
}
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166 |
}
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167 |
}
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168 |
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169 |
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342 |
mateuszvis |
170 |
/* provides body data of the POST query for checkup actions
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171 |
fills buff with data and returns data length.
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172 |
must be called repeateadly until zero-lengh is returned */
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173 |
static unsigned short checkupdata(char *buff) {
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174 |
buff[0] = 0;
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175 |
return(0);
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176 |
}
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177 |
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178 |
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211 |
mateuszvis |
179 |
/* fetch http data from ipaddr using url
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180 |
* write result to file outfname if not null, or print to stdout otherwise
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181 |
* fills bsum with the BSD sum of the data
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342 |
mateuszvis |
182 |
* is ispost is non-zero, then the request is a POST and its body data is
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183 |
* obtained through repeated calls to checkupdata()
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211 |
mateuszvis |
184 |
* returns the length of data obtained, or neg value on error */
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342 |
mateuszvis |
185 |
static long htget(const char *ipaddr, const char *url, const char *outfname, unsigned short *bsum, int ispost, unsigned char *buffer, size_t buffersz) {
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211 |
mateuszvis |
186 |
struct net_tcpsocket *sock;
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327 |
mateuszvis |
187 |
time_t lastactivity, lastprogressoutput = 0;
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342 |
mateuszvis |
188 |
int httpcode = -1, ischunked = 0;
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338 |
mateuszvis |
189 |
int byteread;
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332 |
mateuszvis |
190 |
long flen = 0, lastflen = 0;
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209 |
mateuszvis |
191 |
FILE *fd = NULL;
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207 |
mateuszvis |
192 |
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342 |
mateuszvis |
193 |
/* unchunk state variable is using a little part of the supplied buffer */
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|
194 |
struct unchunk_state *unchstate = (void *)buffer;
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|
195 |
buffer += sizeof(*unchstate);
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196 |
buffersz -= sizeof(*unchstate);
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197 |
memset(unchstate, 0, sizeof(*unchstate));
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|
198 |
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211 |
mateuszvis |
199 |
sock = net_connect(ipaddr, 80);
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207 |
mateuszvis |
200 |
if (sock == NULL) {
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|
201 |
puts("ERROR: failed to connect to " HOSTADDR);
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202 |
goto SHITQUIT;
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|
203 |
}
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|
204 |
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|
205 |
/* wait for net_connect() to actually connect */
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206 |
for (;;) {
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329 |
mateuszvis |
207 |
int connstate = net_isconnected(sock);
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207 |
mateuszvis |
208 |
if (connstate > 0) break;
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209 |
if (connstate < 0) {
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|
210 |
puts("ERROR: connection error");
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211 |
goto SHITQUIT;
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212 |
}
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211 |
mateuszvis |
213 |
_asm int 28h; /* DOS idle */
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207 |
mateuszvis |
214 |
}
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|
215 |
|
330 |
mateuszvis |
216 |
/* socket is connected - send the http request (MUST be HTTP/1.0 because I do not support chunked transfers!) */
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342 |
mateuszvis |
217 |
if (ispost) {
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|
218 |
snprintf((char *)buffer, buffersz, "POST %s HTTP/1.1\r\nHOST: " HOSTADDR "\r\nUSER-AGENT: pkgnet/" PVER "\r\nTransfer-Encoding: chunked\r\nConnection: close\r\n\r\n", url);
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219 |
} else {
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|
220 |
snprintf((char *)buffer, buffersz, "GET %s HTTP/1.1\r\nHOST: " HOSTADDR "\r\nUSER-AGENT: pkgnet/" PVER "\r\nConnection: close\r\n\r\n", url);
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|
221 |
}
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207 |
mateuszvis |
222 |
|
329 |
mateuszvis |
223 |
if (net_send(sock, buffer, strlen((char *)buffer)) != (int)strlen((char *)buffer)) {
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207 |
mateuszvis |
224 |
puts("ERROR: failed to send HTTP query to remote server");
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|
225 |
goto SHITQUIT;
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|
226 |
}
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|
227 |
|
342 |
mateuszvis |
228 |
/* send chunked data for POST queries */
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|
229 |
if (ispost) {
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|
230 |
unsigned short blen;
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|
231 |
int hlen;
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|
232 |
char *hbuf = (char *)buffer + buffersz - 16;
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|
233 |
for (;;) {
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234 |
blen = checkupdata((char *)buffer);
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|
235 |
if (blen == 0) { /* last item contains the message trailer */
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|
236 |
hlen = sprintf(hbuf, "0\r\n\r\n");
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|
237 |
} else {
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|
238 |
hlen = sprintf(hbuf, "%X\r\n", blen);
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|
239 |
}
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|
240 |
if (net_send(sock, hbuf, hlen) != hlen) {
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|
241 |
puts("ERROR: failed to send POST data to remote server");
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|
242 |
goto SHITQUIT;
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|
243 |
}
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|
244 |
if (blen == 0) break;
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|
245 |
if (net_send(sock, buffer, blen) != blen) {
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|
246 |
puts("ERROR: failed to send POST data to remote server");
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|
247 |
goto SHITQUIT;
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|
248 |
}
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|
249 |
}
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|
250 |
}
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|
251 |
|
338 |
mateuszvis |
252 |
/* receive and process HTTP headers */
|
342 |
mateuszvis |
253 |
byteread = htget_headers(buffer, buffersz, sock, &httpcode, &ischunked);
|
207 |
mateuszvis |
254 |
|
338 |
mateuszvis |
255 |
/* transmission error? */
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|
256 |
if (byteread < 0) {
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|
257 |
printf("ERROR: communication error (%d)", byteread);
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|
258 |
puts("");
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|
259 |
goto SHITQUIT;
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|
260 |
}
|
207 |
mateuszvis |
261 |
|
338 |
mateuszvis |
262 |
/* open destination file if required and if no server-side error occured */
|
342 |
mateuszvis |
263 |
if ((httpcode >= 200) && (httpcode <= 299) && (*outfname != 0)) {
|
338 |
mateuszvis |
264 |
fd = fopen(outfname, "wb");
|
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|
265 |
if (fd == NULL) {
|
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|
266 |
printf("ERROR: failed to create file %s", outfname);
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|
267 |
puts("");
|
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|
268 |
goto SHITQUIT;
|
207 |
mateuszvis |
269 |
}
|
338 |
mateuszvis |
270 |
}
|
207 |
mateuszvis |
271 |
|
342 |
mateuszvis |
272 |
/* read body of the answer (and chunk-decode it if needed) */
|
338 |
mateuszvis |
273 |
lastactivity = time(NULL);
|
342 |
mateuszvis |
274 |
for (;; byteread = net_recv(sock, buffer, buffersz - 1)) { /* read 1 byte less because I need to append a NULL terminator when printf'ing the content */
|
338 |
mateuszvis |
275 |
|
|
|
276 |
if (byteread > 0) { /* got data */
|
207 |
mateuszvis |
277 |
lastactivity = time(NULL);
|
342 |
mateuszvis |
278 |
|
|
|
279 |
/* unpack data if server transmits in chunked mode */
|
|
|
280 |
if (ischunked) byteread = unchunk(buffer, byteread, unchstate);
|
|
|
281 |
|
207 |
mateuszvis |
282 |
/* if downloading to file, write stuff to disk */
|
209 |
mateuszvis |
283 |
if (fd != NULL) {
|
|
|
284 |
int i;
|
|
|
285 |
if (fwrite(buffer, 1, byteread, fd) != byteread) {
|
|
|
286 |
printf("ERROR: failed to write data to file %s after %ld bytes", outfname, flen);
|
|
|
287 |
puts("");
|
|
|
288 |
break;
|
|
|
289 |
}
|
|
|
290 |
flen += byteread;
|
327 |
mateuszvis |
291 |
/* update progress once a sec */
|
|
|
292 |
if (lastprogressoutput != lastactivity) {
|
|
|
293 |
lastprogressoutput = lastactivity;
|
333 |
mateuszvis |
294 |
printf("%ld KiB (%ld KiB/s) \r", flen >> 10, (flen >> 10) - (lastflen >> 10)); /* trailing spaces are meant to avoid leaving garbage on screen if speed goes from, say, 1000 KiB/s to 9 KiB/s */
|
332 |
mateuszvis |
295 |
lastflen = flen;
|
|
|
296 |
fflush(stdout); /* avoid console buffering */
|
327 |
mateuszvis |
297 |
}
|
209 |
mateuszvis |
298 |
/* update the bsd sum */
|
|
|
299 |
for (i = 0; i < byteread; i++) {
|
|
|
300 |
/* rotr16 */
|
211 |
mateuszvis |
301 |
unsigned short bsumlsb = *bsum & 1;
|
|
|
302 |
*bsum >>= 1;
|
|
|
303 |
*bsum |= (bsumlsb << 15);
|
|
|
304 |
*bsum += buffer[i];
|
209 |
mateuszvis |
305 |
}
|
|
|
306 |
} else { /* otherwise dump to screen */
|
342 |
mateuszvis |
307 |
buffer[byteread] = 0;
|
209 |
mateuszvis |
308 |
printf("%s", buffer);
|
|
|
309 |
}
|
338 |
mateuszvis |
310 |
|
|
|
311 |
} else if (byteread < 0) { /* end of connection */
|
|
|
312 |
break;
|
|
|
313 |
|
|
|
314 |
} else { /* check for timeout (byteread == 0) */
|
|
|
315 |
if (time(NULL) - lastactivity > 20) { /* TIMEOUT! */
|
|
|
316 |
puts("ERROR: Timeout while waiting for data");
|
|
|
317 |
goto SHITQUIT;
|
|
|
318 |
}
|
|
|
319 |
/* waiting for packets - release a CPU cycle in the meantime */
|
|
|
320 |
_asm int 28h;
|
207 |
mateuszvis |
321 |
}
|
|
|
322 |
}
|
|
|
323 |
|
338 |
mateuszvis |
324 |
goto ALLGOOD;
|
|
|
325 |
|
211 |
mateuszvis |
326 |
SHITQUIT:
|
338 |
mateuszvis |
327 |
flen = -1;
|
|
|
328 |
|
|
|
329 |
ALLGOOD:
|
|
|
330 |
if (fd != NULL) fclose(fd);
|
333 |
mateuszvis |
331 |
net_close(sock);
|
338 |
mateuszvis |
332 |
return(flen);
|
211 |
mateuszvis |
333 |
}
|
|
|
334 |
|
|
|
335 |
|
|
|
336 |
/* checks if file exists, returns 0 if not, non-zero otherwise */
|
|
|
337 |
static int fexists(const char *fname) {
|
|
|
338 |
FILE *fd = fopen(fname, "rb");
|
|
|
339 |
if (fd == NULL) return(0);
|
|
|
340 |
fclose(fd);
|
|
|
341 |
return(1);
|
|
|
342 |
}
|
|
|
343 |
|
|
|
344 |
|
|
|
345 |
int main(int argc, char **argv) {
|
|
|
346 |
unsigned short bsum = 0;
|
|
|
347 |
long flen;
|
342 |
mateuszvis |
348 |
int ispost; /* is the request a POST? */
|
211 |
mateuszvis |
349 |
|
342 |
mateuszvis |
350 |
struct {
|
|
|
351 |
unsigned char buffer[5000];
|
|
|
352 |
char ipaddr[64];
|
|
|
353 |
char url[64];
|
|
|
354 |
char outfname[16];
|
|
|
355 |
} *mem;
|
|
|
356 |
|
|
|
357 |
/* allocate memory */
|
|
|
358 |
mem = malloc(sizeof(*mem));
|
|
|
359 |
if (mem == NULL) {
|
|
|
360 |
puts("ERROR: out of memory");
|
|
|
361 |
return(1);
|
|
|
362 |
}
|
|
|
363 |
|
211 |
mateuszvis |
364 |
/* parse command line arguments */
|
342 |
mateuszvis |
365 |
if (parseargv(argc, argv, mem->outfname, mem->url, &ispost) != 0) return(1);
|
211 |
mateuszvis |
366 |
|
|
|
367 |
/* if outfname requested, make sure that file does not exist yet */
|
342 |
mateuszvis |
368 |
if ((mem->outfname[0] != 0) && (fexists(mem->outfname))) {
|
|
|
369 |
printf("ERROR: file %s already exists", mem->outfname);
|
211 |
mateuszvis |
370 |
puts("");
|
|
|
371 |
return(1);
|
|
|
372 |
}
|
|
|
373 |
|
|
|
374 |
/* init network stack */
|
|
|
375 |
if (net_init() != 0) {
|
|
|
376 |
puts("ERROR: Network subsystem initialization failed");
|
|
|
377 |
return(1);
|
|
|
378 |
}
|
|
|
379 |
|
|
|
380 |
puts(""); /* required because watt-32 likes to print out garbage sometimes ("configuring through DHCP...") */
|
|
|
381 |
|
342 |
mateuszvis |
382 |
if (net_dnsresolve(mem->ipaddr, HOSTADDR) != 0) {
|
211 |
mateuszvis |
383 |
puts("ERROR: DNS resolution failed");
|
|
|
384 |
return(1);
|
|
|
385 |
}
|
|
|
386 |
|
342 |
mateuszvis |
387 |
flen = htget(mem->ipaddr, mem->url, mem->outfname, &bsum, ispost, mem->buffer, sizeof(mem->buffer));
|
211 |
mateuszvis |
388 |
if (flen < 1) return(1);
|
|
|
389 |
|
342 |
mateuszvis |
390 |
if (mem->outfname[0] != 0) {
|
209 |
mateuszvis |
391 |
/* print bsum, size, filename */
|
342 |
mateuszvis |
392 |
printf("Downloaded %ld KiB into %s (BSUM: %04X)", flen >> 10, mem->outfname, bsum);
|
209 |
mateuszvis |
393 |
puts("");
|
|
|
394 |
}
|
|
|
395 |
|
207 |
mateuszvis |
396 |
return(0);
|
|
|
397 |
}
|