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6115
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1
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2 /*
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3 * Copyright (C) Roman Arutyunyan
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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_event.h>
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11 #include <ngx_stream.h>
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12
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13
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14 static char *ngx_stream_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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15 static ngx_int_t ngx_stream_add_ports(ngx_conf_t *cf, ngx_array_t *ports,
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16 ngx_stream_listen_t *listen);
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17 static char *ngx_stream_optimize_servers(ngx_conf_t *cf, ngx_array_t *ports);
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18 static ngx_int_t ngx_stream_add_addrs(ngx_conf_t *cf, ngx_stream_port_t *stport,
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19 ngx_stream_conf_addr_t *addr);
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20 #if (NGX_HAVE_INET6)
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21 static ngx_int_t ngx_stream_add_addrs6(ngx_conf_t *cf,
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22 ngx_stream_port_t *stport, ngx_stream_conf_addr_t *addr);
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23 #endif
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24 static ngx_int_t ngx_stream_cmp_conf_addrs(const void *one, const void *two);
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25
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26
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27 ngx_uint_t ngx_stream_max_module;
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28
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29
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30 static ngx_command_t ngx_stream_commands[] = {
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31
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32 { ngx_string("stream"),
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33 NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
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34 ngx_stream_block,
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35 0,
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36 0,
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37 NULL },
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38
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39 ngx_null_command
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40 };
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41
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42
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43 static ngx_core_module_t ngx_stream_module_ctx = {
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44 ngx_string("stream"),
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45 NULL,
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46 NULL
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47 };
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48
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49
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50 ngx_module_t ngx_stream_module = {
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51 NGX_MODULE_V1,
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52 &ngx_stream_module_ctx, /* module context */
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53 ngx_stream_commands, /* module directives */
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54 NGX_CORE_MODULE, /* module type */
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55 NULL, /* init master */
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56 NULL, /* init module */
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57 NULL, /* init process */
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58 NULL, /* init thread */
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59 NULL, /* exit thread */
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60 NULL, /* exit process */
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61 NULL, /* exit master */
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62 NGX_MODULE_V1_PADDING
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63 };
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64
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65
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66 static char *
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67 ngx_stream_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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68 {
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69 char *rv;
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70 ngx_uint_t i, m, mi, s;
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71 ngx_conf_t pcf;
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72 ngx_array_t ports;
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73 ngx_stream_listen_t *listen;
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74 ngx_stream_module_t *module;
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75 ngx_stream_conf_ctx_t *ctx;
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76 ngx_stream_core_srv_conf_t **cscfp;
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77 ngx_stream_core_main_conf_t *cmcf;
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78
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79 /* the main stream context */
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80
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81 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_stream_conf_ctx_t));
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82 if (ctx == NULL) {
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83 return NGX_CONF_ERROR;
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84 }
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85
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86 *(ngx_stream_conf_ctx_t **) conf = ctx;
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87
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88 /* count the number of the stream modules and set up their indices */
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89
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90 ngx_stream_max_module = 0;
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91 for (m = 0; ngx_modules[m]; m++) {
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92 if (ngx_modules[m]->type != NGX_STREAM_MODULE) {
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93 continue;
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94 }
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95
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96 ngx_modules[m]->ctx_index = ngx_stream_max_module++;
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97 }
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98
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99
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100 /* the stream main_conf context, it's the same in the all stream contexts */
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101
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102 ctx->main_conf = ngx_pcalloc(cf->pool,
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103 sizeof(void *) * ngx_stream_max_module);
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104 if (ctx->main_conf == NULL) {
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105 return NGX_CONF_ERROR;
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106 }
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107
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108
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109 /*
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110 * the stream null srv_conf context, it is used to merge
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111 * the server{}s' srv_conf's
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112 */
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113
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114 ctx->srv_conf = ngx_pcalloc(cf->pool,
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115 sizeof(void *) * ngx_stream_max_module);
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116 if (ctx->srv_conf == NULL) {
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117 return NGX_CONF_ERROR;
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118 }
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119
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120
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121 /*
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122 * create the main_conf's and the null srv_conf's of the all stream modules
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123 */
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124
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125 for (m = 0; ngx_modules[m]; m++) {
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126 if (ngx_modules[m]->type != NGX_STREAM_MODULE) {
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127 continue;
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128 }
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129
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130 module = ngx_modules[m]->ctx;
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131 mi = ngx_modules[m]->ctx_index;
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132
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133 if (module->create_main_conf) {
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134 ctx->main_conf[mi] = module->create_main_conf(cf);
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135 if (ctx->main_conf[mi] == NULL) {
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136 return NGX_CONF_ERROR;
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137 }
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138 }
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139
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140 if (module->create_srv_conf) {
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141 ctx->srv_conf[mi] = module->create_srv_conf(cf);
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142 if (ctx->srv_conf[mi] == NULL) {
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143 return NGX_CONF_ERROR;
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144 }
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145 }
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146 }
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147
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148
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149 /* parse inside the stream{} block */
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150
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151 pcf = *cf;
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152 cf->ctx = ctx;
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153
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154 cf->module_type = NGX_STREAM_MODULE;
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155 cf->cmd_type = NGX_STREAM_MAIN_CONF;
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156 rv = ngx_conf_parse(cf, NULL);
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157
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158 if (rv != NGX_CONF_OK) {
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159 *cf = pcf;
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160 return rv;
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161 }
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162
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163
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164 /* init stream{} main_conf's, merge the server{}s' srv_conf's */
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165
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166 cmcf = ctx->main_conf[ngx_stream_core_module.ctx_index];
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167 cscfp = cmcf->servers.elts;
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168
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169 for (m = 0; ngx_modules[m]; m++) {
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170 if (ngx_modules[m]->type != NGX_STREAM_MODULE) {
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171 continue;
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172 }
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173
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174 module = ngx_modules[m]->ctx;
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175 mi = ngx_modules[m]->ctx_index;
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176
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177 /* init stream{} main_conf's */
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178
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179 cf->ctx = ctx;
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180
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181 if (module->init_main_conf) {
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182 rv = module->init_main_conf(cf, ctx->main_conf[mi]);
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183 if (rv != NGX_CONF_OK) {
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184 *cf = pcf;
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185 return rv;
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186 }
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187 }
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188
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189 for (s = 0; s < cmcf->servers.nelts; s++) {
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190
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191 /* merge the server{}s' srv_conf's */
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192
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193 cf->ctx = cscfp[s]->ctx;
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194
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195 if (module->merge_srv_conf) {
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196 rv = module->merge_srv_conf(cf,
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197 ctx->srv_conf[mi],
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198 cscfp[s]->ctx->srv_conf[mi]);
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199 if (rv != NGX_CONF_OK) {
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200 *cf = pcf;
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201 return rv;
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202 }
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203 }
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204 }
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205 }
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206
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207 *cf = pcf;
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208
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209
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210 if (ngx_array_init(&ports, cf->temp_pool, 4, sizeof(ngx_stream_conf_port_t))
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211 != NGX_OK)
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212 {
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213 return NGX_CONF_ERROR;
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214 }
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215
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216 listen = cmcf->listen.elts;
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217
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218 for (i = 0; i < cmcf->listen.nelts; i++) {
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219 if (ngx_stream_add_ports(cf, &ports, &listen[i]) != NGX_OK) {
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220 return NGX_CONF_ERROR;
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221 }
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222 }
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223
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224 return ngx_stream_optimize_servers(cf, &ports);
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225 }
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226
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227
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228 static ngx_int_t
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229 ngx_stream_add_ports(ngx_conf_t *cf, ngx_array_t *ports,
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230 ngx_stream_listen_t *listen)
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231 {
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232 in_port_t p;
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233 ngx_uint_t i;
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234 struct sockaddr *sa;
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235 struct sockaddr_in *sin;
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236 ngx_stream_conf_port_t *port;
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237 ngx_stream_conf_addr_t *addr;
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238 #if (NGX_HAVE_INET6)
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239 struct sockaddr_in6 *sin6;
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240 #endif
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241
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242 sa = (struct sockaddr *) &listen->sockaddr;
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243
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244 switch (sa->sa_family) {
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245
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246 #if (NGX_HAVE_INET6)
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247 case AF_INET6:
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248 sin6 = (struct sockaddr_in6 *) sa;
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249 p = sin6->sin6_port;
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250 break;
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251 #endif
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252
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253 #if (NGX_HAVE_UNIX_DOMAIN)
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254 case AF_UNIX:
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255 p = 0;
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256 break;
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257 #endif
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258
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259 default: /* AF_INET */
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260 sin = (struct sockaddr_in *) sa;
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261 p = sin->sin_port;
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262 break;
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263 }
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264
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265 port = ports->elts;
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266 for (i = 0; i < ports->nelts; i++) {
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267 if (p == port[i].port && sa->sa_family == port[i].family) {
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268
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269 /* a port is already in the port list */
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270
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271 port = &port[i];
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272 goto found;
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273 }
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274 }
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275
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276 /* add a port to the port list */
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277
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278 port = ngx_array_push(ports);
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279 if (port == NULL) {
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280 return NGX_ERROR;
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281 }
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282
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283 port->family = sa->sa_family;
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284 port->port = p;
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285
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286 if (ngx_array_init(&port->addrs, cf->temp_pool, 2,
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287 sizeof(ngx_stream_conf_addr_t))
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288 != NGX_OK)
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289 {
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290 return NGX_ERROR;
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291 }
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292
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293 found:
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294
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295 addr = ngx_array_push(&port->addrs);
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296 if (addr == NULL) {
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297 return NGX_ERROR;
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298 }
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299
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300 addr->sockaddr = (struct sockaddr *) &listen->sockaddr;
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301 addr->socklen = listen->socklen;
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302 addr->ctx = listen->ctx;
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303 addr->bind = listen->bind;
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304 addr->wildcard = listen->wildcard;
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305 addr->so_keepalive = listen->so_keepalive;
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306 #if (NGX_HAVE_KEEPALIVE_TUNABLE)
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307 addr->tcp_keepidle = listen->tcp_keepidle;
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308 addr->tcp_keepintvl = listen->tcp_keepintvl;
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309 addr->tcp_keepcnt = listen->tcp_keepcnt;
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310 #endif
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311 #if (NGX_STREAM_SSL)
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312 addr->ssl = listen->ssl;
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313 #endif
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314 #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY)
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315 addr->ipv6only = listen->ipv6only;
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316 #endif
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317
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318 return NGX_OK;
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319 }
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320
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321
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322 static char *
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323 ngx_stream_optimize_servers(ngx_conf_t *cf, ngx_array_t *ports)
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324 {
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325 ngx_uint_t i, p, last, bind_wildcard;
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326 ngx_listening_t *ls;
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327 ngx_stream_port_t *stport;
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328 ngx_stream_conf_port_t *port;
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329 ngx_stream_conf_addr_t *addr;
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330 ngx_stream_core_srv_conf_t *cscf;
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331
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332 port = ports->elts;
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333 for (p = 0; p < ports->nelts; p++) {
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334
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335 ngx_sort(port[p].addrs.elts, (size_t) port[p].addrs.nelts,
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336 sizeof(ngx_stream_conf_addr_t), ngx_stream_cmp_conf_addrs);
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337
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338 addr = port[p].addrs.elts;
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339 last = port[p].addrs.nelts;
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340
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341 /*
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342 * if there is the binding to the "*:port" then we need to bind()
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343 * to the "*:port" only and ignore the other bindings
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344 */
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345
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346 if (addr[last - 1].wildcard) {
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347 addr[last - 1].bind = 1;
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348 bind_wildcard = 1;
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349
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350 } else {
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351 bind_wildcard = 0;
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352 }
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353
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354 i = 0;
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355
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356 while (i < last) {
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357
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358 if (bind_wildcard && !addr[i].bind) {
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359 i++;
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360 continue;
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361 }
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362
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363 ls = ngx_create_listening(cf, addr[i].sockaddr, addr[i].socklen);
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364 if (ls == NULL) {
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365 return NGX_CONF_ERROR;
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366 }
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367
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368 ls->addr_ntop = 1;
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369 ls->handler = ngx_stream_init_connection;
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370 ls->pool_size = 256;
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371
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372 cscf = addr->ctx->srv_conf[ngx_stream_core_module.ctx_index];
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373 ls->logp = cscf->error_log;
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374
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375 ls->log.data = &ls->addr_text;
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376 ls->log.handler = ngx_accept_log_error;
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377
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378 ls->keepalive = addr[i].so_keepalive;
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379 #if (NGX_HAVE_KEEPALIVE_TUNABLE)
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380 ls->keepidle = addr[i].tcp_keepidle;
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381 ls->keepintvl = addr[i].tcp_keepintvl;
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382 ls->keepcnt = addr[i].tcp_keepcnt;
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383 #endif
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384
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385 #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY)
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386 ls->ipv6only = addr[i].ipv6only;
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387 #endif
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388
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389 stport = ngx_palloc(cf->pool, sizeof(ngx_stream_port_t));
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390 if (stport == NULL) {
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391 return NGX_CONF_ERROR;
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392 }
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393
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394 ls->servers = stport;
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395
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396 if (i == last - 1) {
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397 stport->naddrs = last;
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398
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399 } else {
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400 stport->naddrs = 1;
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401 i = 0;
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402 }
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403
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404 switch (ls->sockaddr->sa_family) {
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405 #if (NGX_HAVE_INET6)
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406 case AF_INET6:
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407 if (ngx_stream_add_addrs6(cf, stport, addr) != NGX_OK) {
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408 return NGX_CONF_ERROR;
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409 }
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410 break;
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411 #endif
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412 default: /* AF_INET */
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413 if (ngx_stream_add_addrs(cf, stport, addr) != NGX_OK) {
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414 return NGX_CONF_ERROR;
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415 }
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416 break;
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417 }
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418
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419 addr++;
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420 last--;
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421 }
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422 }
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423
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424 return NGX_CONF_OK;
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425 }
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426
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427
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428 static ngx_int_t
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429 ngx_stream_add_addrs(ngx_conf_t *cf, ngx_stream_port_t *stport,
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430 ngx_stream_conf_addr_t *addr)
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431 {
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432 u_char *p;
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433 size_t len;
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434 ngx_uint_t i;
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435 struct sockaddr_in *sin;
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436 ngx_stream_in_addr_t *addrs;
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437 u_char buf[NGX_SOCKADDR_STRLEN];
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438
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439 stport->addrs = ngx_pcalloc(cf->pool,
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440 stport->naddrs * sizeof(ngx_stream_in_addr_t));
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441 if (stport->addrs == NULL) {
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442 return NGX_ERROR;
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443 }
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444
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445 addrs = stport->addrs;
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446
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447 for (i = 0; i < stport->naddrs; i++) {
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448
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449 sin = (struct sockaddr_in *) addr[i].sockaddr;
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450 addrs[i].addr = sin->sin_addr.s_addr;
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451
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452 addrs[i].conf.ctx = addr[i].ctx;
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453 #if (NGX_STREAM_SSL)
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454 addrs[i].conf.ssl = addr[i].ssl;
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455 #endif
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456
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457 len = ngx_sock_ntop(addr[i].sockaddr, addr[i].socklen, buf,
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458 NGX_SOCKADDR_STRLEN, 1);
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459
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460 p = ngx_pnalloc(cf->pool, len);
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461 if (p == NULL) {
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462 return NGX_ERROR;
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463 }
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464
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465 ngx_memcpy(p, buf, len);
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466
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467 addrs[i].conf.addr_text.len = len;
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468 addrs[i].conf.addr_text.data = p;
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469 }
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470
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471 return NGX_OK;
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472 }
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473
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|
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474
|
|
|
475 #if (NGX_HAVE_INET6)
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476
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477 static ngx_int_t
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478 ngx_stream_add_addrs6(ngx_conf_t *cf, ngx_stream_port_t *stport,
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|
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479 ngx_stream_conf_addr_t *addr)
|
|
|
480 {
|
|
|
481 u_char *p;
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|
|
482 size_t len;
|
|
|
483 ngx_uint_t i;
|
|
|
484 struct sockaddr_in6 *sin6;
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|
|
485 ngx_stream_in6_addr_t *addrs6;
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|
|
486 u_char buf[NGX_SOCKADDR_STRLEN];
|
|
|
487
|
|
|
488 stport->addrs = ngx_pcalloc(cf->pool,
|
|
|
489 stport->naddrs * sizeof(ngx_stream_in6_addr_t));
|
|
|
490 if (stport->addrs == NULL) {
|
|
|
491 return NGX_ERROR;
|
|
|
492 }
|
|
|
493
|
|
|
494 addrs6 = stport->addrs;
|
|
|
495
|
|
|
496 for (i = 0; i < stport->naddrs; i++) {
|
|
|
497
|
|
|
498 sin6 = (struct sockaddr_in6 *) addr[i].sockaddr;
|
|
|
499 addrs6[i].addr6 = sin6->sin6_addr;
|
|
|
500
|
|
|
501 addrs6[i].conf.ctx = addr[i].ctx;
|
|
|
502 #if (NGX_STREAM_SSL)
|
|
|
503 addrs6[i].conf.ssl = addr[i].ssl;
|
|
|
504 #endif
|
|
|
505
|
|
|
506 len = ngx_sock_ntop(addr[i].sockaddr, addr[i].socklen, buf,
|
|
|
507 NGX_SOCKADDR_STRLEN, 1);
|
|
|
508
|
|
|
509 p = ngx_pnalloc(cf->pool, len);
|
|
|
510 if (p == NULL) {
|
|
|
511 return NGX_ERROR;
|
|
|
512 }
|
|
|
513
|
|
|
514 ngx_memcpy(p, buf, len);
|
|
|
515
|
|
|
516 addrs6[i].conf.addr_text.len = len;
|
|
|
517 addrs6[i].conf.addr_text.data = p;
|
|
|
518 }
|
|
|
519
|
|
|
520 return NGX_OK;
|
|
|
521 }
|
|
|
522
|
|
|
523 #endif
|
|
|
524
|
|
|
525
|
|
|
526 static ngx_int_t
|
|
|
527 ngx_stream_cmp_conf_addrs(const void *one, const void *two)
|
|
|
528 {
|
|
|
529 ngx_stream_conf_addr_t *first, *second;
|
|
|
530
|
|
|
531 first = (ngx_stream_conf_addr_t *) one;
|
|
|
532 second = (ngx_stream_conf_addr_t *) two;
|
|
|
533
|
|
|
534 if (first->wildcard) {
|
|
|
535 /* a wildcard must be the last resort, shift it to the end */
|
|
|
536 return 1;
|
|
|
537 }
|
|
|
538
|
|
|
539 if (second->wildcard) {
|
|
|
540 /* a wildcard must be the last resort, shift it to the end */
|
|
|
541 return -1;
|
|
|
542 }
|
|
|
543
|
|
|
544 if (first->bind && !second->bind) {
|
|
|
545 /* shift explicit bind()ed addresses to the start */
|
|
|
546 return -1;
|
|
|
547 }
|
|
|
548
|
|
|
549 if (!first->bind && second->bind) {
|
|
|
550 /* shift explicit bind()ed addresses to the start */
|
|
|
551 return 1;
|
|
|
552 }
|
|
|
553
|
|
|
554 /* do not sort by default */
|
|
|
555
|
|
|
556 return 0;
|
|
|
557 }
|
