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nginx/src/http/modules/ngx_http_geoip_module.c

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/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#include <GeoIP.h>
#include <GeoIPCity.h>
typedef struct {
GeoIP *country;
GeoIP *city;
} ngx_http_geoip_conf_t;
typedef struct {
ngx_str_t *name;
uintptr_t data;
} ngx_http_geoip_var_t;
typedef const char *(*ngx_http_geoip_variable_handler_pt)(GeoIP *, u_long addr);
static ngx_int_t ngx_http_geoip_country_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_geoip_city_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_geoip_city_float_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static GeoIPRecord *ngx_http_geoip_get_city_record(ngx_http_request_t *r);
static ngx_int_t ngx_http_geoip_add_variables(ngx_conf_t *cf);
static void *ngx_http_geoip_create_conf(ngx_conf_t *cf);
static char *ngx_http_geoip_country(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_http_geoip_city(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static void ngx_http_geoip_cleanup(void *data);
static ngx_command_t ngx_http_geoip_commands[] = {
{ ngx_string("geoip_country"),
NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
ngx_http_geoip_country,
NGX_HTTP_MAIN_CONF_OFFSET,
0,
NULL },
{ ngx_string("geoip_city"),
NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
ngx_http_geoip_city,
NGX_HTTP_MAIN_CONF_OFFSET,
0,
NULL },
ngx_null_command
};
static ngx_http_module_t ngx_http_geoip_module_ctx = {
ngx_http_geoip_add_variables, /* preconfiguration */
NULL, /* postconfiguration */
ngx_http_geoip_create_conf, /* 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_geoip_module = {
NGX_MODULE_V1,
&ngx_http_geoip_module_ctx, /* module context */
ngx_http_geoip_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
};
static ngx_http_variable_t ngx_http_geoip_vars[] = {
{ ngx_string("geoip_country_code"), NULL,
ngx_http_geoip_country_variable,
(uintptr_t) GeoIP_country_code_by_ipnum, 0, 0 },
{ ngx_string("geoip_country_code3"), NULL,
ngx_http_geoip_country_variable,
(uintptr_t) GeoIP_country_code3_by_ipnum, 0, 0 },
{ ngx_string("geoip_country_name"), NULL,
ngx_http_geoip_country_variable,
(uintptr_t) GeoIP_country_name_by_ipnum, 0, 0 },
{ ngx_string("geoip_city_continent_code"), NULL,
ngx_http_geoip_city_variable,
offsetof(GeoIPRecord, continent_code), 0, 0 },
{ ngx_string("geoip_city_country_code"), NULL,
ngx_http_geoip_city_variable,
offsetof(GeoIPRecord, country_code), 0, 0 },
{ ngx_string("geoip_city_country_code3"), NULL,
ngx_http_geoip_city_variable,
offsetof(GeoIPRecord, country_code3), 0, 0 },
{ ngx_string("geoip_city_country_name"), NULL,
ngx_http_geoip_city_variable,
offsetof(GeoIPRecord, country_name), 0, 0 },
{ ngx_string("geoip_region"), NULL,
ngx_http_geoip_city_variable,
offsetof(GeoIPRecord, region), 0, 0 },
{ ngx_string("geoip_city"), NULL,
ngx_http_geoip_city_variable,
offsetof(GeoIPRecord, city), 0, 0 },
{ ngx_string("geoip_postal_code"), NULL,
ngx_http_geoip_city_variable,
offsetof(GeoIPRecord, postal_code), 0, 0 },
{ ngx_string("geoip_latitude"), NULL,
ngx_http_geoip_city_float_variable,
offsetof(GeoIPRecord, latitude), 0, 0 },
{ ngx_string("geoip_longitude"), NULL,
ngx_http_geoip_city_float_variable,
offsetof(GeoIPRecord, longitude), 0, 0 },
{ ngx_null_string, NULL, NULL, 0, 0, 0 }
};
static ngx_int_t
ngx_http_geoip_country_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
ngx_http_geoip_variable_handler_pt handler =
(ngx_http_geoip_variable_handler_pt) data;
u_long addr;
const char *val;
struct sockaddr_in *sin;
ngx_http_geoip_conf_t *gcf;
gcf = ngx_http_get_module_main_conf(r, ngx_http_geoip_module);
if (gcf->country == NULL) {
goto not_found;
}
if (r->connection->sockaddr->sa_family != AF_INET) {
goto not_found;
}
sin = (struct sockaddr_in *) r->connection->sockaddr;
addr = ntohl(sin->sin_addr.s_addr);
val = handler(gcf->country, addr);
if (val == NULL) {
goto not_found;
}
v->len = ngx_strlen(val);
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = (u_char *) val;
return NGX_OK;
not_found:
v->not_found = 1;
return NGX_OK;
}
static ngx_int_t
ngx_http_geoip_city_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
char *val;
size_t len;
GeoIPRecord *gr;
gr = ngx_http_geoip_get_city_record(r);
if (gr == NULL) {
goto not_found;
}
val = *(char **) ((char *) gr + data);
if (val == NULL) {
goto no_value;
}
len = ngx_strlen(val);
v->data = ngx_pnalloc(r->pool, len);
if (v->data == NULL) {
GeoIPRecord_delete(gr);
return NGX_ERROR;
}
ngx_memcpy(v->data, val, len);
v->len = len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
GeoIPRecord_delete(gr);
return NGX_OK;
no_value:
GeoIPRecord_delete(gr);
not_found:
v->not_found = 1;
return NGX_OK;
}
static ngx_int_t
ngx_http_geoip_city_float_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
float val;
GeoIPRecord *gr;
gr = ngx_http_geoip_get_city_record(r);
if (gr == NULL) {
v->not_found = 1;
return NGX_OK;
}
v->data = ngx_pnalloc(r->pool, NGX_INT64_LEN + 5);
if (v->data == NULL) {
GeoIPRecord_delete(gr);
return NGX_ERROR;
}
val = *(float *) ((char *) gr + data);
v->len = ngx_sprintf(v->data, "%.4f", val) - v->data;
GeoIPRecord_delete(gr);
return NGX_OK;
}
static GeoIPRecord *
ngx_http_geoip_get_city_record(ngx_http_request_t *r)
{
u_long addr;
struct sockaddr_in *sin;
ngx_http_geoip_conf_t *gcf;
gcf = ngx_http_get_module_main_conf(r, ngx_http_geoip_module);
if (gcf->city && r->connection->sockaddr->sa_family == AF_INET) {
sin = (struct sockaddr_in *) r->connection->sockaddr;
addr = ntohl(sin->sin_addr.s_addr);
return GeoIP_record_by_ipnum(gcf->city, addr);
}
return NULL;
}
static ngx_int_t
ngx_http_geoip_add_variables(ngx_conf_t *cf)
{
ngx_http_variable_t *var, *v;
for (v = ngx_http_geoip_vars; v->name.len; v++) {
var = ngx_http_add_variable(cf, &v->name, v->flags);
if (var == NULL) {
return NGX_ERROR;
}
var->get_handler = v->get_handler;
var->data = v->data;
}
return NGX_OK;
}
static void *
ngx_http_geoip_create_conf(ngx_conf_t *cf)
{
ngx_pool_cleanup_t *cln;
ngx_http_geoip_conf_t *conf;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_geoip_conf_t));
if (conf == NULL) {
return NULL;
}
cln = ngx_pool_cleanup_add(cf->pool, 0);
if (cln == NULL) {
return NULL;
}
cln->handler = ngx_http_geoip_cleanup;
cln->data = conf;
return conf;
}
static char *
ngx_http_geoip_country(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_http_geoip_conf_t *gcf = conf;
ngx_str_t *value;
if (gcf->country) {
return "is duplicate";
}
value = cf->args->elts;
gcf->country = GeoIP_open((char *) value[1].data, GEOIP_MEMORY_CACHE);
if (gcf->country == NULL) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"GeoIO_open(\"%V\") failed", &value[1]);
return NGX_CONF_ERROR;
}
switch (gcf->country->databaseType) {
case GEOIP_COUNTRY_EDITION:
case GEOIP_PROXY_EDITION:
case GEOIP_NETSPEED_EDITION:
return NGX_CONF_OK;
default:
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid GeoIP database \"%V\" type:%d",
&value[1], gcf->country->databaseType);
return NGX_CONF_ERROR;
}
}
static char *
ngx_http_geoip_city(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_http_geoip_conf_t *gcf = conf;
ngx_str_t *value;
if (gcf->city) {
return "is duplicate";
}
value = cf->args->elts;
gcf->city = GeoIP_open((char *) value[1].data, GEOIP_MEMORY_CACHE);
if (gcf->city == NULL) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"GeoIO_open(\"%V\") failed", &value[1]);
return NGX_CONF_ERROR;
}
switch (gcf->city->databaseType) {
case GEOIP_CITY_EDITION_REV0:
case GEOIP_CITY_EDITION_REV1:
return NGX_CONF_OK;
default:
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid GeoIP City database \"%V\" type:%d",
&value[1], gcf->city->databaseType);
return NGX_CONF_ERROR;
}
}
static void
ngx_http_geoip_cleanup(void *data)
{
ngx_http_geoip_conf_t *gcf = data;
if (gcf->country) {
GeoIP_delete(gcf->country);
}
if (gcf->city) {
GeoIP_delete(gcf->city);
}
}
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