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annotate src/scanner.h @ 405:8f3a84de3739 stable-6-0-53-2

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author Carl Byington <carl@five-ten-sg.com>
date Fri, 17 Mar 2017 13:50:38 -0700
parents f92f24950bd3
children f9165d9aa689
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1 /*
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2
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c7fc218686f5 gpl3, block mail to recipients that cannot reply
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3 Copyright (c) 2007 Carl Byington - 510 Software Group, released under
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4 the GPL version 3 or any later version at your choice available at
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5 http://www.gnu.org/licenses/gpl-3.0.txt
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6
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7 */
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8
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9 #ifndef scanner_include
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10 #define scanner_include
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11
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12 #include "dnsbl.h"
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13
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14 ////////////////////////////////////////////////
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15 // memory for the content scanner
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16 //
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17 class recorder
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18 {
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19 mlfiPriv *priv; // needed for syslog
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20 string_set *html_tags; // valid tags
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21 string_set *tlds; // valid tlds
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22 string_set *tldwilds; // valid wildcard tlds
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23 string_set *tldnots; // invalid tlds
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24 string_set hosts;
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25 size_t bad_html_tags;
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26 size_t binary_tags;
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27
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28 public:
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29 recorder(mlfiPriv *priv_, string_set &html_tags_, string_set &tlds_, string_set &tldwilds_, string_set &tldnots_);
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30 ~recorder() { empty(); };
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31 void empty();
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32 void new_url(const char *host);
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33 void new_tag(const char *tag);
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34 void binary();
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35 void syslog(const char *buf) { my_syslog(priv, buf); };
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36 mlfiPriv *get_priv() { return priv; };
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37 string_set *get_tlds() { return tlds; };
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38 string_set *get_tldwilds() { return tldwilds; };
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39 string_set *get_tldnots() { return tldnots; };
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40 string_set &get_hosts() { return hosts; };
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41 bool excessive_bad_tags(size_t limit){ return (limit > 0) && (bad_html_tags > limit) && (bad_html_tags > 3*binary_tags); };
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42 bool excessive_hosts(size_t limit) { return (limit > 0) && (hosts.size() > limit); };
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43
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44 };
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45
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46
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47 ////////////////////////////////////////////////
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48 // the content scanner
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49 //
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50 class fsa;
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51 class url_scanner {
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52 fsa *host_parser;
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53 fsa *tags_parser;
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54 fsa *urls_parser;
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55 fsa *urld_parser;
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56 fsa *html_parser;
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57 fsa *mime_parser;
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58 fsa *b64_parser;
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59 fsa *uu_parser;
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61 public:
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62 url_scanner(recorder *memory);
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63 ~url_scanner();
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64 void scan(u_char *buffer, size_t length);
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65 };
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67 #endif