1 | #include "owl.h" |
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2 | |
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3 | static const char * owl_filterelement_get_field(const owl_message *m, const char * field) |
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4 | { |
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5 | const char *match; |
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6 | if (!strcasecmp(field, "class")) { |
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7 | match=owl_message_get_class(m); |
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8 | } else if (!strcasecmp(field, "instance")) { |
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9 | match=owl_message_get_instance(m); |
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10 | } else if (!strcasecmp(field, "sender")) { |
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11 | match=owl_message_get_sender(m); |
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12 | } else if (!strcasecmp(field, "recipient")) { |
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13 | match=owl_message_get_recipient(m); |
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14 | } else if (!strcasecmp(field, "body")) { |
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15 | match=owl_message_get_body(m); |
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16 | } else if (!strcasecmp(field, "opcode")) { |
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17 | match=owl_message_get_opcode(m); |
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18 | } else if (!strcasecmp(field, "realm")) { |
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19 | match=owl_message_get_realm(m); |
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20 | } else if (!strcasecmp(field, "type")) { |
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21 | match=owl_message_get_type(m); |
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22 | } else if (!strcasecmp(field, "hostname")) { |
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23 | match=owl_message_get_hostname(m); |
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24 | } else if (!strcasecmp(field, "deleted")) { |
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25 | match=owl_message_is_delete(m) ? "true" : "false"; |
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26 | } else if (!strcasecmp(field, "direction")) { |
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27 | if (owl_message_is_direction_out(m)) { |
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28 | match="out"; |
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29 | } else if (owl_message_is_direction_in(m)) { |
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30 | match="in"; |
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31 | } else if (owl_message_is_direction_none(m)) { |
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32 | match="none"; |
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33 | } else { |
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34 | match=""; |
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35 | } |
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36 | } else if (!strcasecmp(field, "login")) { |
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37 | if (owl_message_is_login(m)) { |
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38 | match="login"; |
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39 | } else if (owl_message_is_logout(m)) { |
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40 | match="logout"; |
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41 | } else { |
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42 | match="none"; |
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43 | } |
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44 | } else { |
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45 | match = owl_message_get_attribute_value(m,field); |
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46 | if(match == NULL) match = ""; |
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47 | } |
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48 | |
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49 | return match; |
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50 | } |
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51 | |
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52 | static int owl_filterelement_match_false(const owl_filterelement *fe, const owl_message *m) |
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53 | { |
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54 | return 0; |
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55 | } |
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56 | |
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57 | static int owl_filterelement_match_true(const owl_filterelement *fe, const owl_message *m) |
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58 | { |
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59 | return 1; |
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60 | } |
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61 | |
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62 | static int owl_filterelement_match_re(const owl_filterelement *fe, const owl_message *m) |
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63 | { |
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64 | const char * val = owl_filterelement_get_field(m, fe->field); |
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65 | return !owl_regex_compare(&(fe->re), val, NULL, NULL); |
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66 | } |
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67 | |
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68 | static int owl_filterelement_match_filter(const owl_filterelement *fe, const owl_message *m) |
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69 | { |
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70 | const owl_filter *subfilter; |
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71 | subfilter=owl_global_get_filter(&g, fe->field); |
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72 | if (!subfilter) { |
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73 | /* the filter does not exist, maybe because it was deleted. |
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74 | * Default to not matching |
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75 | */ |
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76 | return 0; |
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77 | } |
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78 | return owl_filter_message_match(subfilter, m); |
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79 | } |
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80 | |
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81 | static int owl_filterelement_match_perl(const owl_filterelement *fe, const owl_message *m) |
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82 | { |
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83 | const char *subname; |
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84 | char *perlrv; |
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85 | int tf=0; |
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86 | |
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87 | subname = fe->field; |
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88 | if (!owl_perlconfig_is_function(subname)) { |
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89 | return 0; |
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90 | } |
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91 | perlrv = owl_perlconfig_call_with_message(subname, m); |
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92 | if (perlrv) { |
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93 | if (0 == strcmp(perlrv, "1")) { |
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94 | tf=1; |
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95 | } |
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96 | g_free(perlrv); |
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97 | } |
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98 | return tf; |
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99 | } |
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100 | |
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101 | static int owl_filterelement_match_group(const owl_filterelement *fe, const owl_message *m) |
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102 | { |
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103 | return owl_filterelement_match(fe->left, m); |
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104 | } |
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105 | |
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106 | /* XXX: Our boolean operators short-circuit here. The original owl did |
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107 | not. Do we care? |
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108 | */ |
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109 | |
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110 | static int owl_filterelement_match_and(const owl_filterelement *fe, const owl_message *m) |
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111 | { |
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112 | return owl_filterelement_match(fe->left, m) && |
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113 | owl_filterelement_match(fe->right, m); |
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114 | } |
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115 | |
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116 | static int owl_filterelement_match_or(const owl_filterelement *fe, const owl_message *m) |
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117 | { |
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118 | return owl_filterelement_match(fe->left, m) || |
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119 | owl_filterelement_match(fe->right, m); |
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120 | } |
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121 | |
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122 | static int owl_filterelement_match_not(const owl_filterelement *fe, const owl_message *m) |
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123 | { |
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124 | return !owl_filterelement_match(fe->left, m); |
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125 | } |
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126 | |
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127 | /* Print methods */ |
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128 | |
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129 | static void owl_filterelement_print_true(const owl_filterelement *fe, GString *buf) |
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130 | { |
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131 | g_string_append(buf, "true"); |
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132 | } |
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133 | |
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134 | static void owl_filterelement_print_false(const owl_filterelement *fe, GString *buf) |
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135 | { |
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136 | g_string_append(buf, "false"); |
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137 | } |
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138 | |
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139 | static void owl_filterelement_print_re(const owl_filterelement *fe, GString *buf) |
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140 | { |
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141 | const char *re; |
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142 | g_string_append(buf, fe->field); |
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143 | g_string_append(buf, " "); |
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144 | |
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145 | re = owl_regex_get_string(&(fe->re)); |
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146 | owl_string_append_quoted_arg(buf, re); |
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147 | } |
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148 | |
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149 | static void owl_filterelement_print_filter(const owl_filterelement *fe, GString *buf) |
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150 | { |
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151 | g_string_append(buf, "filter "); |
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152 | owl_string_append_quoted_arg(buf, fe->field); |
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153 | } |
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154 | |
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155 | static void owl_filterelement_print_perl(const owl_filterelement *fe, GString *buf) |
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156 | { |
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157 | g_string_append(buf, "perl "); |
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158 | owl_string_append_quoted_arg(buf, fe->field); |
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159 | } |
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160 | |
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161 | static void owl_filterelement_print_group(const owl_filterelement *fe, GString *buf) |
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162 | { |
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163 | g_string_append(buf, "( "); |
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164 | owl_filterelement_print(fe->left, buf) ; |
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165 | g_string_append(buf, " )"); |
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166 | } |
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167 | |
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168 | static void owl_filterelement_print_or(const owl_filterelement *fe, GString *buf) |
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169 | { |
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170 | owl_filterelement_print(fe->left, buf); |
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171 | g_string_append(buf, " or "); |
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172 | owl_filterelement_print(fe->right, buf); |
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173 | } |
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174 | |
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175 | static void owl_filterelement_print_and(const owl_filterelement *fe, GString *buf) |
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176 | { |
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177 | owl_filterelement_print(fe->left, buf); |
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178 | g_string_append(buf, " and "); |
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179 | owl_filterelement_print(fe->right, buf); |
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180 | } |
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181 | |
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182 | static void owl_filterelement_print_not(const owl_filterelement *fe, GString *buf) |
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183 | { |
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184 | g_string_append(buf, " not "); |
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185 | owl_filterelement_print(fe->left, buf); |
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186 | } |
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187 | |
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188 | /* Constructors */ |
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189 | |
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190 | void owl_filterelement_create(owl_filterelement *fe) { |
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191 | fe->field = NULL; |
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192 | fe->left = fe->right = NULL; |
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193 | fe->match_message = NULL; |
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194 | fe->print_elt = NULL; |
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195 | owl_regex_init(&(fe->re)); |
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196 | } |
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197 | |
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198 | |
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199 | void owl_filterelement_create_true(owl_filterelement *fe) |
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200 | { |
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201 | owl_filterelement_create(fe); |
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202 | fe->match_message = owl_filterelement_match_true; |
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203 | fe->print_elt = owl_filterelement_print_true; |
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204 | } |
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205 | |
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206 | void owl_filterelement_create_false(owl_filterelement *fe) |
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207 | { |
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208 | owl_filterelement_create(fe); |
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209 | fe->match_message = owl_filterelement_match_false; |
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210 | fe->print_elt = owl_filterelement_print_false; |
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211 | } |
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212 | |
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213 | int owl_filterelement_create_re(owl_filterelement *fe, const char *field, const char *re) |
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214 | { |
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215 | owl_filterelement_create(fe); |
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216 | fe->field=g_strdup(field); |
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217 | if(owl_regex_create(&(fe->re), re)) { |
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218 | g_free(fe->field); |
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219 | fe->field = NULL; |
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220 | return (-1); |
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221 | } |
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222 | fe->match_message = owl_filterelement_match_re; |
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223 | fe->print_elt = owl_filterelement_print_re; |
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224 | return 0; |
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225 | } |
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226 | |
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227 | void owl_filterelement_create_filter(owl_filterelement *fe, const char *name) |
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228 | { |
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229 | owl_filterelement_create(fe); |
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230 | fe->field=g_strdup(name); |
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231 | fe->match_message = owl_filterelement_match_filter; |
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232 | fe->print_elt = owl_filterelement_print_filter; |
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233 | } |
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234 | |
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235 | void owl_filterelement_create_perl(owl_filterelement *fe, const char *name) |
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236 | { |
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237 | owl_filterelement_create(fe); |
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238 | fe->field=g_strdup(name); |
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239 | fe->match_message = owl_filterelement_match_perl; |
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240 | fe->print_elt = owl_filterelement_print_perl; |
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241 | } |
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242 | |
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243 | void owl_filterelement_create_group(owl_filterelement *fe, owl_filterelement *in) |
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244 | { |
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245 | owl_filterelement_create(fe); |
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246 | fe->left = in; |
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247 | fe->match_message = owl_filterelement_match_group; |
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248 | fe->print_elt = owl_filterelement_print_group; |
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249 | } |
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250 | |
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251 | void owl_filterelement_create_not(owl_filterelement *fe, owl_filterelement *in) |
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252 | { |
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253 | owl_filterelement_create(fe); |
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254 | fe->left = in; |
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255 | fe->match_message = owl_filterelement_match_not; |
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256 | fe->print_elt = owl_filterelement_print_not; |
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257 | } |
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258 | |
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259 | void owl_filterelement_create_and(owl_filterelement *fe, owl_filterelement *lhs, owl_filterelement *rhs) |
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260 | { |
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261 | owl_filterelement_create(fe); |
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262 | fe->left = lhs; |
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263 | fe->right = rhs; |
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264 | fe->match_message = owl_filterelement_match_and; |
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265 | fe->print_elt = owl_filterelement_print_and; |
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266 | } |
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267 | |
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268 | void owl_filterelement_create_or(owl_filterelement *fe, owl_filterelement *lhs, owl_filterelement *rhs) |
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269 | { |
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270 | owl_filterelement_create(fe); |
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271 | fe->left = lhs; |
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272 | fe->right = rhs; |
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273 | fe->match_message = owl_filterelement_match_or; |
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274 | fe->print_elt = owl_filterelement_print_or; |
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275 | } |
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276 | |
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277 | int owl_filterelement_match(const owl_filterelement *fe, const owl_message *m) |
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278 | { |
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279 | if(!fe) return 0; |
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280 | if(!fe->match_message) return 0; |
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281 | return fe->match_message(fe, m); |
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282 | } |
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283 | |
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284 | static int fe_visiting = 0; |
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285 | static int fe_visited = 1; |
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286 | |
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287 | int owl_filterelement_is_toodeep(const owl_filter *f, const owl_filterelement *fe) |
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288 | { |
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289 | int rv; |
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290 | owl_dict filters; |
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291 | owl_dict_create(&filters); |
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292 | |
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293 | owl_dict_insert_element(&filters, f->name, &fe_visiting, owl_dict_noop_delete); |
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294 | |
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295 | rv = _owl_filterelement_is_toodeep(fe, &filters); |
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296 | |
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297 | owl_dict_cleanup(&filters, NULL); |
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298 | return rv; |
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299 | } |
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300 | |
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301 | int _owl_filterelement_is_toodeep(const owl_filterelement *fe, owl_dict *seen) |
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302 | { |
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303 | int rv = 0; |
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304 | const owl_filter *f; |
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305 | |
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306 | if(fe->match_message == owl_filterelement_match_filter) { |
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307 | int *nval = owl_dict_find_element(seen, fe->field); |
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308 | if(nval == &fe_visiting) { |
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309 | return 1; |
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310 | } else if (nval == NULL) { |
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311 | f = owl_global_get_filter(&g, fe->field); |
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312 | owl_dict_insert_element(seen, fe->field, &fe_visiting, owl_dict_noop_delete); |
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313 | if(f) rv = _owl_filterelement_is_toodeep(f->root, seen); |
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314 | owl_dict_insert_element(seen, fe->field, &fe_visited, owl_dict_noop_delete); |
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315 | } |
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316 | } else { |
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317 | if(fe->left) |
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318 | rv = rv || _owl_filterelement_is_toodeep(fe->left, seen); |
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319 | if(fe->right) |
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320 | rv = rv || _owl_filterelement_is_toodeep(fe->right, seen); |
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321 | } |
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322 | return rv; |
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323 | } |
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324 | |
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325 | void owl_filterelement_cleanup(owl_filterelement *fe) |
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326 | { |
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327 | if (fe->field) g_free(fe->field); |
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328 | if (fe->left) { |
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329 | owl_filterelement_cleanup(fe->left); |
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330 | g_slice_free(owl_filterelement, fe->left); |
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331 | } |
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332 | if (fe->right) { |
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333 | owl_filterelement_cleanup(fe->right); |
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334 | g_slice_free(owl_filterelement, fe->right); |
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335 | } |
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336 | owl_regex_cleanup(&(fe->re)); |
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337 | } |
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338 | |
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339 | void owl_filterelement_print(const owl_filterelement *fe, GString *buf) |
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340 | { |
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341 | if(!fe || !fe->print_elt) return; |
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342 | fe->print_elt(fe, buf); |
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343 | } |
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