blob: 6e26b6ea346b63c04cee19adcd200dac327e4bab [file] [log] [blame]
/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
typedef struct {
ngx_radix_tree_t *tree;
ngx_pool_t *pool;
ngx_array_t values;
} ngx_http_geo_conf_ctx_t;
static char *ngx_http_geo_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static char *ngx_http_geo(ngx_conf_t *cf, ngx_command_t *dummy, void *conf);
static ngx_command_t ngx_http_geo_commands[] = {
{ ngx_string("geo"),
NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE1,
ngx_http_geo_block,
NGX_HTTP_MAIN_CONF_OFFSET,
0,
NULL },
ngx_null_command
};
static ngx_http_module_t ngx_http_geo_module_ctx = {
NULL, /* preconfiguration */
NULL, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
NULL, /* create location configuration */
NULL /* merge location configuration */
};
ngx_module_t ngx_http_geo_module = {
NGX_MODULE_V1,
&ngx_http_geo_module_ctx, /* module context */
ngx_http_geo_commands, /* module directives */
NGX_HTTP_MODULE, /* module type */
NULL, /* init master */
NULL, /* init module */
NULL, /* init process */
NULL, /* init thread */
NULL, /* exit thread */
NULL, /* exit process */
NULL, /* exit master */
NGX_MODULE_V1_PADDING
};
/* AF_INET only */
static ngx_int_t
ngx_http_geo_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
uintptr_t data)
{
ngx_radix_tree_t *tree = (ngx_radix_tree_t *) data;
struct sockaddr_in *sin;
ngx_http_variable_value_t *vv;
sin = (struct sockaddr_in *) r->connection->sockaddr;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http geo started");
vv = (ngx_http_variable_value_t *)
ngx_radix32tree_find(tree, ntohl(sin->sin_addr.s_addr));
*v = *vv;
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http geo: %V %v", &r->connection->addr_text, v);
return NGX_OK;
}
static char *
ngx_http_geo_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
char *rv;
ngx_str_t *value, name;
ngx_conf_t save;
ngx_pool_t *pool;
ngx_radix_tree_t *tree;
ngx_http_variable_t *var;
ngx_http_geo_conf_ctx_t ctx;
value = cf->args->elts;
name = value[1];
if (name.data[0] != '$') {
ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
"\"%V\" variable name should start with '$'",
&value[1]);
} else {
name.len--;
name.data++;
}
var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGABLE);
if (var == NULL) {
return NGX_CONF_ERROR;
}
tree = ngx_radix_tree_create(cf->pool, -1);
if (tree == NULL) {
return NGX_CONF_ERROR;
}
var->get_handler = ngx_http_geo_variable;
var->data = (uintptr_t) tree;
pool = ngx_create_pool(16384, cf->log);
if (pool == NULL) {
return NGX_CONF_ERROR;
}
if (ngx_array_init(&ctx.values, pool, 512,
sizeof(ngx_http_variable_value_t *))
!= NGX_OK)
{
ngx_destroy_pool(pool);
return NGX_CONF_ERROR;
}
ctx.tree = tree;
ctx.pool = cf->pool;
save = *cf;
cf->pool = pool;
cf->ctx = &ctx;
cf->handler = ngx_http_geo;
cf->handler_conf = conf;
rv = ngx_conf_parse(cf, NULL);
*cf = save;
ngx_destroy_pool(pool);
if (ngx_radix32tree_find(tree, 0) != NGX_RADIX_NO_VALUE) {
return rv;
}
if (ngx_radix32tree_insert(tree, 0, 0,
(uintptr_t) &ngx_http_variable_null_value)
== NGX_ERROR)
{
return NGX_CONF_ERROR;
}
return rv;
}
/* AF_INET only */
static char *
ngx_http_geo(ngx_conf_t *cf, ngx_command_t *dummy, void *conf)
{
ngx_int_t rc;
ngx_str_t *value, file;
ngx_uint_t i;
ngx_inet_cidr_t cidrin;
ngx_http_geo_conf_ctx_t *ctx;
ngx_http_variable_value_t *var, *old, **v;
ctx = cf->ctx;
if (cf->args->nelts != 2) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid number of the geo parameters");
return NGX_CONF_ERROR;
}
value = cf->args->elts;
if (ngx_strcmp(value[0].data, "include") == 0) {
file = value[1];
if (ngx_conf_full_name(cf->cycle, &file, 1) == NGX_ERROR){
return NGX_CONF_ERROR;
}
ngx_log_debug1(NGX_LOG_DEBUG_CORE, cf->log, 0, "include %s", file.data);
return ngx_conf_parse(cf, &file);
}
if (ngx_strcmp(value[0].data, "default") == 0) {
cidrin.addr = 0;
cidrin.mask = 0;
} else {
rc = ngx_ptocidr(&value[0], &cidrin);
if (rc == NGX_ERROR) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid parameter \"%V\"", &value[0]);
return NGX_CONF_ERROR;
}
if (rc == NGX_DONE) {
ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
"low address bits of %V are meaningless",
&value[0]);
}
cidrin.addr = ntohl(cidrin.addr);
cidrin.mask = ntohl(cidrin.mask);
}
var = NULL;
v = ctx->values.elts;
for (i = 0; i < ctx->values.nelts; i++) {
if ((size_t) v[i]->len != value[1].len) {
continue;
}
if (ngx_strncmp(value[1].data, v[i]->data, value[1].len) == 0) {
var = v[i];
break;
}
}
if (var == NULL) {
var = ngx_palloc(ctx->pool, sizeof(ngx_http_variable_value_t));
if (var == NULL) {
return NGX_CONF_ERROR;
}
var->len = value[1].len;
var->data = ngx_pstrdup(ctx->pool, &value[1]);
if (var->data == NULL) {
return NGX_CONF_ERROR;
}
var->valid = 1;
var->no_cachable = 0;
var->not_found = 0;
v = ngx_array_push(&ctx->values);
if (v == NULL) {
return NGX_CONF_ERROR;
}
*v = var;
}
for (i = 2; i; i--) {
rc = ngx_radix32tree_insert(ctx->tree, cidrin.addr, cidrin.mask,
(uintptr_t) var);
if (rc == NGX_OK) {
return NGX_CONF_OK;
}
if (rc == NGX_ERROR) {
return NGX_CONF_ERROR;
}
/* rc == NGX_BUSY */
old = (ngx_http_variable_value_t *)
ngx_radix32tree_find(ctx->tree, cidrin.addr & cidrin.mask);
ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
"duplicate parameter \"%V\", value: \"%v\", old value: \"%v\"",
&value[0], var, old);
rc = ngx_radix32tree_delete(ctx->tree, cidrin.addr, cidrin.mask);
if (rc == NGX_ERROR) {
return NGX_CONF_ERROR;
}
}
return NGX_CONF_ERROR;
}