1 | /** |
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2 | * Program: LogParser.java |
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3 | * Editor: Waue Chen |
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4 | * From : NCHC. Taiwn |
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5 | * Last Update Date: 07/17/2008 |
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6 | */ |
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7 | |
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8 | package tw.org.nchc.code; |
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9 | |
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10 | import java.io.BufferedReader; |
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11 | import java.io.BufferedWriter; |
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12 | import java.io.File; |
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13 | import java.io.FileReader; |
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14 | import java.io.FileWriter; |
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15 | import java.io.IOException; |
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16 | import java.text.ParseException; |
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17 | import java.util.StringTokenizer; |
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18 | import java.util.regex.Matcher; |
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19 | import java.util.regex.Pattern; |
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20 | |
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21 | public class SnortParser { |
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22 | private String logData = new String(); |
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23 | private BufferedReader fi ; |
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24 | private BufferedWriter fw ; |
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25 | public SnortParser(String in, String ou) throws IOException { |
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26 | fi = new BufferedReader(new FileReader(new File(in))); |
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27 | fw = new BufferedWriter(new FileWriter(new File(ou))); |
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28 | } |
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29 | |
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30 | public static boolean isIpAddress(String inputString) { |
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31 | StringTokenizer tokenizer = new StringTokenizer(inputString, "."); |
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32 | if (tokenizer.countTokens() != 4) { |
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33 | return false; |
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34 | } |
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35 | try { |
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36 | for (int i = 0; i < 4; i++) { |
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37 | String t = tokenizer.nextToken(); |
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38 | int chunk = Integer.parseInt(t); |
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39 | if ((chunk & 255) != chunk) { |
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40 | return false; |
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41 | } |
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42 | } |
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43 | } catch (NumberFormatException e) { |
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44 | return false; |
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45 | } |
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46 | if (inputString.indexOf("..") >= 0) { |
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47 | return false; |
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48 | } |
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49 | return true; |
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50 | } |
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51 | |
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52 | public void snortParser(String line, int i) throws ParseException, |
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53 | Exception { |
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54 | String[] data ; |
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55 | Pattern patten_line; |
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56 | Matcher matcher; |
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57 | switch (i) { |
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58 | case 1: |
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59 | patten_line = Pattern |
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60 | .compile("^\\[\\**\\] \\[([1-9]*):([1-9]*):([1-9]*)\\] ([^\\[]*)\\[\\**\\]$"); |
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61 | break; |
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62 | case 2: |
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63 | patten_line = Pattern |
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64 | .compile("^\\[Classification: ([^\\]]*)\\] \\[Priority: ([1-9]*)\\].*$"); |
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65 | break; |
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66 | case 3: |
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67 | patten_line = Pattern |
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68 | .compile("(^[0-9]*)\\/([0-9]*)\\-([0-9]*)\\:([0-9]*)\\:([0-9]*)\\.[0-9]* ([^ ]*) -> ([^$]*)$"); |
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69 | break; |
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70 | case 4: |
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71 | patten_line = Pattern |
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72 | .compile("^([^ ]*) TTL:([^ ]*) TOS:([^ ]*) ID:([^ ]*) IpLen:([^ ]*) DgmLen:([^ ]*)$"); |
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73 | break; |
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74 | default: |
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75 | patten_line = null; |
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76 | break; |
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77 | } |
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78 | matcher = patten_line.matcher(line); |
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79 | if (matcher.matches()) { |
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80 | int number = matcher.groupCount(); |
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81 | data = new String[number]; |
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82 | for (int j = 0; j < number; j++) { |
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83 | data[j] = matcher.group(j+1); |
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84 | this.logData += (data[j]+";"); |
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85 | } |
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86 | |
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87 | } |
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88 | |
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89 | } |
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90 | void parseToLine() throws IOException,ParseException,Exception { |
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91 | |
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92 | String line = null; |
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93 | int count = 0; |
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94 | |
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95 | do { |
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96 | String tmp = this.fi.readLine(); |
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97 | if (tmp == null) { |
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98 | break; |
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99 | }else if(count < 4){ |
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100 | line = tmp; |
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101 | // System.out.println(line); |
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102 | snortParser(line, count+1); |
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103 | count ++; |
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104 | }else if(count ==4 ){ |
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105 | count ++; |
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106 | }else if (count == 5){ |
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107 | this.fw.write(this.logData.toString() + "\n"); |
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108 | this.logData = "" ; |
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109 | count = 0; |
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110 | } |
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111 | else |
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112 | { |
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113 | System.err.print(" Error ! "); |
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114 | return ; |
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115 | } |
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116 | } while (true); |
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117 | this.fw.flush(); |
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118 | this.fw.close(); |
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119 | |
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120 | } |
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121 | public static void main(String[] args) throws ParseException, Exception { |
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122 | String in = new String("/home/waue/Desktop/alert"); |
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123 | String ou = new String("/home/waue/Desktop/bb"); |
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124 | SnortParser a = new SnortParser(in,ou); |
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125 | a.parseToLine(); |
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126 | } |
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127 | } |
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