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6609
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 * Copyright (C) Nginx, Inc.
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5 */
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6
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10 #include <ngx_stream.h>
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11
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12
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13 typedef struct {
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14 ngx_uint_t hash_max_size;
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15 ngx_uint_t hash_bucket_size;
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16 } ngx_stream_map_conf_t;
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17
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18
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19 typedef struct {
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20 ngx_hash_keys_arrays_t keys;
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21
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22 ngx_array_t *values_hash;
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23 #if (NGX_PCRE)
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24 ngx_array_t regexes;
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25 #endif
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26
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27 ngx_stream_variable_value_t *default_value;
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28 ngx_conf_t *cf;
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29 ngx_uint_t hostnames; /* unsigned hostnames:1 */
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30 } ngx_stream_map_conf_ctx_t;
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31
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32
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33 typedef struct {
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34 ngx_stream_map_t map;
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35 ngx_stream_complex_value_t value;
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36 ngx_stream_variable_value_t *default_value;
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37 ngx_uint_t hostnames; /* unsigned hostnames:1 */
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38 } ngx_stream_map_ctx_t;
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39
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40
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41 static int ngx_libc_cdecl ngx_stream_map_cmp_dns_wildcards(const void *one,
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42 const void *two);
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43 static void *ngx_stream_map_create_conf(ngx_conf_t *cf);
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44 static char *ngx_stream_map_block(ngx_conf_t *cf, ngx_command_t *cmd,
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45 void *conf);
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46 static char *ngx_stream_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf);
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47
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48
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49 static ngx_command_t ngx_stream_map_commands[] = {
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50
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51 { ngx_string("map"),
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52 NGX_STREAM_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE2,
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53 ngx_stream_map_block,
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54 NGX_STREAM_MAIN_CONF_OFFSET,
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55 0,
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56 NULL },
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57
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58 { ngx_string("map_hash_max_size"),
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59 NGX_STREAM_MAIN_CONF|NGX_CONF_TAKE1,
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60 ngx_conf_set_num_slot,
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61 NGX_STREAM_MAIN_CONF_OFFSET,
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62 offsetof(ngx_stream_map_conf_t, hash_max_size),
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63 NULL },
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64
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65 { ngx_string("map_hash_bucket_size"),
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66 NGX_STREAM_MAIN_CONF|NGX_CONF_TAKE1,
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67 ngx_conf_set_num_slot,
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68 NGX_STREAM_MAIN_CONF_OFFSET,
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69 offsetof(ngx_stream_map_conf_t, hash_bucket_size),
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70 NULL },
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71
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72 ngx_null_command
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73 };
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74
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75
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76 static ngx_stream_module_t ngx_stream_map_module_ctx = {
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77 NULL, /* preconfiguration */
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78 NULL, /* postconfiguration */
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79
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80 ngx_stream_map_create_conf, /* create main configuration */
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81 NULL, /* init main configuration */
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82
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83 NULL, /* create server configuration */
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84 NULL, /* merge server configuration */
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85 };
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86
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87
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88 ngx_module_t ngx_stream_map_module = {
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89 NGX_MODULE_V1,
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90 &ngx_stream_map_module_ctx, /* module context */
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91 ngx_stream_map_commands, /* module directives */
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92 NGX_STREAM_MODULE, /* module type */
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93 NULL, /* init master */
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94 NULL, /* init module */
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95 NULL, /* init process */
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96 NULL, /* init thread */
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97 NULL, /* exit thread */
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98 NULL, /* exit process */
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99 NULL, /* exit master */
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100 NGX_MODULE_V1_PADDING
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101 };
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102
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103
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104 static ngx_int_t
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105 ngx_stream_map_variable(ngx_stream_session_t *s, ngx_stream_variable_value_t *v,
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106 uintptr_t data)
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107 {
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108 ngx_stream_map_ctx_t *map = (ngx_stream_map_ctx_t *) data;
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109
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110 ngx_str_t val, str;
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111 ngx_stream_complex_value_t *cv;
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112 ngx_stream_variable_value_t *value;
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113
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114 ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
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115 "stream map started");
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116
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117 if (ngx_stream_complex_value(s, &map->value, &val) != NGX_OK) {
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118 return NGX_ERROR;
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119 }
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120
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121 if (map->hostnames && val.len > 0 && val.data[val.len - 1] == '.') {
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122 val.len--;
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123 }
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124
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125 value = ngx_stream_map_find(s, &map->map, &val);
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126
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127 if (value == NULL) {
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128 value = map->default_value;
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129 }
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130
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131 if (!value->valid) {
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132 cv = (ngx_stream_complex_value_t *) value->data;
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133
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134 if (ngx_stream_complex_value(s, cv, &str) != NGX_OK) {
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135 return NGX_ERROR;
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136 }
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137
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138 v->valid = 1;
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139 v->no_cacheable = 0;
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140 v->not_found = 0;
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141 v->len = str.len;
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142 v->data = str.data;
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143
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144 } else {
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145 *v = *value;
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146 }
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147
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148 ngx_log_debug2(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
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149 "stream map: \"%V\" \"%v\"", &val, v);
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150
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151 return NGX_OK;
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152 }
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153
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154
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155 static void *
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156 ngx_stream_map_create_conf(ngx_conf_t *cf)
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157 {
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158 ngx_stream_map_conf_t *mcf;
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159
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160 mcf = ngx_palloc(cf->pool, sizeof(ngx_stream_map_conf_t));
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161 if (mcf == NULL) {
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162 return NULL;
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163 }
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164
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165 mcf->hash_max_size = NGX_CONF_UNSET_UINT;
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166 mcf->hash_bucket_size = NGX_CONF_UNSET_UINT;
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167
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168 return mcf;
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169 }
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170
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171
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172 static char *
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173 ngx_stream_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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174 {
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175 ngx_stream_map_conf_t *mcf = conf;
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176
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177 char *rv;
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178 ngx_str_t *value, name;
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179 ngx_conf_t save;
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180 ngx_pool_t *pool;
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181 ngx_hash_init_t hash;
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182 ngx_stream_map_ctx_t *map;
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183 ngx_stream_variable_t *var;
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184 ngx_stream_map_conf_ctx_t ctx;
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185 ngx_stream_compile_complex_value_t ccv;
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186
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187 if (mcf->hash_max_size == NGX_CONF_UNSET_UINT) {
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188 mcf->hash_max_size = 2048;
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189 }
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190
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191 if (mcf->hash_bucket_size == NGX_CONF_UNSET_UINT) {
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192 mcf->hash_bucket_size = ngx_cacheline_size;
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193
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194 } else {
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195 mcf->hash_bucket_size = ngx_align(mcf->hash_bucket_size,
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196 ngx_cacheline_size);
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197 }
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198
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199 map = ngx_pcalloc(cf->pool, sizeof(ngx_stream_map_ctx_t));
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200 if (map == NULL) {
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201 return NGX_CONF_ERROR;
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202 }
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203
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204 value = cf->args->elts;
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205
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206 ngx_memzero(&ccv, sizeof(ngx_stream_compile_complex_value_t));
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207
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208 ccv.cf = cf;
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209 ccv.value = &value[1];
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210 ccv.complex_value = &map->value;
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211
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212 if (ngx_stream_compile_complex_value(&ccv) != NGX_OK) {
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213 return NGX_CONF_ERROR;
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214 }
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215
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216 name = value[2];
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217
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218 if (name.data[0] != '$') {
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219 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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220 "invalid variable name \"%V\"", &name);
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221 return NGX_CONF_ERROR;
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222 }
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223
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224 name.len--;
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225 name.data++;
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226
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227 var = ngx_stream_add_variable(cf, &name, NGX_STREAM_VAR_CHANGEABLE);
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228 if (var == NULL) {
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229 return NGX_CONF_ERROR;
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230 }
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231
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232 var->get_handler = ngx_stream_map_variable;
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233 var->data = (uintptr_t) map;
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234
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235 pool = ngx_create_pool(NGX_DEFAULT_POOL_SIZE, cf->log);
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236 if (pool == NULL) {
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237 return NGX_CONF_ERROR;
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238 }
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239
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240 ctx.keys.pool = cf->pool;
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241 ctx.keys.temp_pool = pool;
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242
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243 if (ngx_hash_keys_array_init(&ctx.keys, NGX_HASH_LARGE) != NGX_OK) {
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244 ngx_destroy_pool(pool);
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245 return NGX_CONF_ERROR;
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246 }
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247
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248 ctx.values_hash = ngx_pcalloc(pool, sizeof(ngx_array_t) * ctx.keys.hsize);
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249 if (ctx.values_hash == NULL) {
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250 ngx_destroy_pool(pool);
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251 return NGX_CONF_ERROR;
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252 }
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253
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254 #if (NGX_PCRE)
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255 if (ngx_array_init(&ctx.regexes, cf->pool, 2,
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256 sizeof(ngx_stream_map_regex_t))
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257 != NGX_OK)
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258 {
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259 ngx_destroy_pool(pool);
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260 return NGX_CONF_ERROR;
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261 }
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262 #endif
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263
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264 ctx.default_value = NULL;
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265 ctx.cf = &save;
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266 ctx.hostnames = 0;
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267
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268 save = *cf;
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269 cf->pool = pool;
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270 cf->ctx = &ctx;
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271 cf->handler = ngx_stream_map;
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272 cf->handler_conf = conf;
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273
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274 rv = ngx_conf_parse(cf, NULL);
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275
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276 *cf = save;
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277
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278 if (rv != NGX_CONF_OK) {
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279 ngx_destroy_pool(pool);
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280 return rv;
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281 }
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282
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283 map->default_value = ctx.default_value ? ctx.default_value:
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284 &ngx_stream_variable_null_value;
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285
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286 map->hostnames = ctx.hostnames;
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287
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288 hash.key = ngx_hash_key_lc;
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289 hash.max_size = mcf->hash_max_size;
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290 hash.bucket_size = mcf->hash_bucket_size;
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291 hash.name = "map_hash";
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292 hash.pool = cf->pool;
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293
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294 if (ctx.keys.keys.nelts) {
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295 hash.hash = &map->map.hash.hash;
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296 hash.temp_pool = NULL;
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297
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298 if (ngx_hash_init(&hash, ctx.keys.keys.elts, ctx.keys.keys.nelts)
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299 != NGX_OK)
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300 {
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301 ngx_destroy_pool(pool);
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302 return NGX_CONF_ERROR;
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303 }
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304 }
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305
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306 if (ctx.keys.dns_wc_head.nelts) {
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307
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308 ngx_qsort(ctx.keys.dns_wc_head.elts,
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309 (size_t) ctx.keys.dns_wc_head.nelts,
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310 sizeof(ngx_hash_key_t), ngx_stream_map_cmp_dns_wildcards);
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311
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312 hash.hash = NULL;
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313 hash.temp_pool = pool;
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314
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315 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_head.elts,
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316 ctx.keys.dns_wc_head.nelts)
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317 != NGX_OK)
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318 {
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319 ngx_destroy_pool(pool);
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320 return NGX_CONF_ERROR;
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321 }
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322
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323 map->map.hash.wc_head = (ngx_hash_wildcard_t *) hash.hash;
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324 }
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325
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326 if (ctx.keys.dns_wc_tail.nelts) {
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327
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328 ngx_qsort(ctx.keys.dns_wc_tail.elts,
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329 (size_t) ctx.keys.dns_wc_tail.nelts,
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330 sizeof(ngx_hash_key_t), ngx_stream_map_cmp_dns_wildcards);
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331
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332 hash.hash = NULL;
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333 hash.temp_pool = pool;
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334
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335 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_tail.elts,
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336 ctx.keys.dns_wc_tail.nelts)
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337 != NGX_OK)
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338 {
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339 ngx_destroy_pool(pool);
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340 return NGX_CONF_ERROR;
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341 }
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342
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343 map->map.hash.wc_tail = (ngx_hash_wildcard_t *) hash.hash;
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344 }
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345
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346 #if (NGX_PCRE)
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347
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348 if (ctx.regexes.nelts) {
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349 map->map.regex = ctx.regexes.elts;
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350 map->map.nregex = ctx.regexes.nelts;
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351 }
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352
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353 #endif
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354
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355 ngx_destroy_pool(pool);
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356
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357 return rv;
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358 }
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359
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360
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361 static int ngx_libc_cdecl
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362 ngx_stream_map_cmp_dns_wildcards(const void *one, const void *two)
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363 {
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364 ngx_hash_key_t *first, *second;
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365
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366 first = (ngx_hash_key_t *) one;
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367 second = (ngx_hash_key_t *) two;
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368
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369 return ngx_dns_strcmp(first->key.data, second->key.data);
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370 }
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371
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372
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373 static char *
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374 ngx_stream_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf)
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375 {
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376 u_char *data;
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377 size_t len;
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378 ngx_int_t rv;
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379 ngx_str_t *value, v;
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380 ngx_uint_t i, key;
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381 ngx_stream_map_conf_ctx_t *ctx;
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382 ngx_stream_complex_value_t cv, *cvp;
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383 ngx_stream_variable_value_t *var, **vp;
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384 ngx_stream_compile_complex_value_t ccv;
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385
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386 ctx = cf->ctx;
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387
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388 value = cf->args->elts;
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389
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390 if (cf->args->nelts == 1
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391 && ngx_strcmp(value[0].data, "hostnames") == 0)
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392 {
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393 ctx->hostnames = 1;
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394 return NGX_CONF_OK;
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395
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396 } else if (cf->args->nelts != 2) {
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397 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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398 "invalid number of the map parameters");
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399 return NGX_CONF_ERROR;
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400 }
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401
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402 if (ngx_strcmp(value[0].data, "include") == 0) {
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403 return ngx_conf_include(cf, dummy, conf);
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404 }
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405
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406 key = 0;
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407
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408 for (i = 0; i < value[1].len; i++) {
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409 key = ngx_hash(key, value[1].data[i]);
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410 }
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411
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|
|
412 key %= ctx->keys.hsize;
|
|
|
413
|
|
|
414 vp = ctx->values_hash[key].elts;
|
|
|
415
|
|
|
416 if (vp) {
|
|
|
417 for (i = 0; i < ctx->values_hash[key].nelts; i++) {
|
|
|
418
|
|
|
419 if (vp[i]->valid) {
|
|
|
420 data = vp[i]->data;
|
|
|
421 len = vp[i]->len;
|
|
|
422
|
|
|
423 } else {
|
|
|
424 cvp = (ngx_stream_complex_value_t *) vp[i]->data;
|
|
|
425 data = cvp->value.data;
|
|
|
426 len = cvp->value.len;
|
|
|
427 }
|
|
|
428
|
|
|
429 if (value[1].len != len) {
|
|
|
430 continue;
|
|
|
431 }
|
|
|
432
|
|
|
433 if (ngx_strncmp(value[1].data, data, len) == 0) {
|
|
|
434 var = vp[i];
|
|
|
435 goto found;
|
|
|
436 }
|
|
|
437 }
|
|
|
438
|
|
|
439 } else {
|
|
|
440 if (ngx_array_init(&ctx->values_hash[key], cf->pool, 4,
|
|
|
441 sizeof(ngx_stream_variable_value_t *))
|
|
|
442 != NGX_OK)
|
|
|
443 {
|
|
|
444 return NGX_CONF_ERROR;
|
|
|
445 }
|
|
|
446 }
|
|
|
447
|
|
|
448 var = ngx_palloc(ctx->keys.pool, sizeof(ngx_stream_variable_value_t));
|
|
|
449 if (var == NULL) {
|
|
|
450 return NGX_CONF_ERROR;
|
|
|
451 }
|
|
|
452
|
|
|
453 v.len = value[1].len;
|
|
|
454 v.data = ngx_pstrdup(ctx->keys.pool, &value[1]);
|
|
|
455 if (v.data == NULL) {
|
|
|
456 return NGX_CONF_ERROR;
|
|
|
457 }
|
|
|
458
|
|
|
459 ngx_memzero(&ccv, sizeof(ngx_stream_compile_complex_value_t));
|
|
|
460
|
|
|
461 ccv.cf = ctx->cf;
|
|
|
462 ccv.value = &v;
|
|
|
463 ccv.complex_value = &cv;
|
|
|
464
|
|
|
465 if (ngx_stream_compile_complex_value(&ccv) != NGX_OK) {
|
|
|
466 return NGX_CONF_ERROR;
|
|
|
467 }
|
|
|
468
|
|
|
469 if (cv.lengths != NULL) {
|
|
|
470 cvp = ngx_palloc(ctx->keys.pool, sizeof(ngx_stream_complex_value_t));
|
|
|
471 if (cvp == NULL) {
|
|
|
472 return NGX_CONF_ERROR;
|
|
|
473 }
|
|
|
474
|
|
|
475 *cvp = cv;
|
|
|
476
|
|
|
477 var->len = 0;
|
|
|
478 var->data = (u_char *) cvp;
|
|
|
479 var->valid = 0;
|
|
|
480
|
|
|
481 } else {
|
|
|
482 var->len = v.len;
|
|
|
483 var->data = v.data;
|
|
|
484 var->valid = 1;
|
|
|
485 }
|
|
|
486
|
|
|
487 var->no_cacheable = 0;
|
|
|
488 var->not_found = 0;
|
|
|
489
|
|
|
490 vp = ngx_array_push(&ctx->values_hash[key]);
|
|
|
491 if (vp == NULL) {
|
|
|
492 return NGX_CONF_ERROR;
|
|
|
493 }
|
|
|
494
|
|
|
495 *vp = var;
|
|
|
496
|
|
|
497 found:
|
|
|
498
|
|
|
499 if (ngx_strcmp(value[0].data, "default") == 0) {
|
|
|
500
|
|
|
501 if (ctx->default_value) {
|
|
|
502 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
503 "duplicate default map parameter");
|
|
|
504 return NGX_CONF_ERROR;
|
|
|
505 }
|
|
|
506
|
|
|
507 ctx->default_value = var;
|
|
|
508
|
|
|
509 return NGX_CONF_OK;
|
|
|
510 }
|
|
|
511
|
|
|
512 #if (NGX_PCRE)
|
|
|
513
|
|
|
514 if (value[0].len && value[0].data[0] == '~') {
|
|
|
515 ngx_regex_compile_t rc;
|
|
|
516 ngx_stream_map_regex_t *regex;
|
|
|
517 u_char errstr[NGX_MAX_CONF_ERRSTR];
|
|
|
518
|
|
|
519 regex = ngx_array_push(&ctx->regexes);
|
|
|
520 if (regex == NULL) {
|
|
|
521 return NGX_CONF_ERROR;
|
|
|
522 }
|
|
|
523
|
|
|
524 value[0].len--;
|
|
|
525 value[0].data++;
|
|
|
526
|
|
|
527 ngx_memzero(&rc, sizeof(ngx_regex_compile_t));
|
|
|
528
|
|
|
529 if (value[0].data[0] == '*') {
|
|
|
530 value[0].len--;
|
|
|
531 value[0].data++;
|
|
|
532 rc.options = NGX_REGEX_CASELESS;
|
|
|
533 }
|
|
|
534
|
|
|
535 rc.pattern = value[0];
|
|
|
536 rc.err.len = NGX_MAX_CONF_ERRSTR;
|
|
|
537 rc.err.data = errstr;
|
|
|
538
|
|
|
539 regex->regex = ngx_stream_regex_compile(ctx->cf, &rc);
|
|
|
540 if (regex->regex == NULL) {
|
|
|
541 return NGX_CONF_ERROR;
|
|
|
542 }
|
|
|
543
|
|
|
544 regex->value = var;
|
|
|
545
|
|
|
546 return NGX_CONF_OK;
|
|
|
547 }
|
|
|
548
|
|
|
549 #endif
|
|
|
550
|
|
|
551 if (value[0].len && value[0].data[0] == '\\') {
|
|
|
552 value[0].len--;
|
|
|
553 value[0].data++;
|
|
|
554 }
|
|
|
555
|
|
|
556 rv = ngx_hash_add_key(&ctx->keys, &value[0], var,
|
|
|
557 (ctx->hostnames) ? NGX_HASH_WILDCARD_KEY : 0);
|
|
|
558
|
|
|
559 if (rv == NGX_OK) {
|
|
|
560 return NGX_CONF_OK;
|
|
|
561 }
|
|
|
562
|
|
|
563 if (rv == NGX_DECLINED) {
|
|
|
564 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
565 "invalid hostname or wildcard \"%V\"", &value[0]);
|
|
|
566 }
|
|
|
567
|
|
|
568 if (rv == NGX_BUSY) {
|
|
|
569 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
570 "conflicting parameter \"%V\"", &value[0]);
|
|
|
571 }
|
|
|
572
|
|
|
573 return NGX_CONF_ERROR;
|
|
|
574 }
|
