lighttpd 1.4.x https://www.lighttpd.net/
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#include "first.h"
#include <GeoIP.h>
#include <GeoIPCity.h>
#include "base.h"
#include "log.h"
#include "buffer.h"
#include "http_header.h"
#include "plugin.h"
#include <stdlib.h>
#include <string.h>
/**
*
* $mod_geoip.c (v2.0) (13.09.2006 00:29:11)
*
* Name:
* mod_geoip.c
*
* Description:
* GeoIP module (plugin) for lighttpd.
* the module loads a geoip database of type "country" or "city" and
* sets new ENV vars based on ip record lookups.
*
* country db env's:
* GEOIP_COUNTRY_CODE
* GEOIP_COUNTRY_CODE3
* GEOIP_COUNTRY_NAME
*
* city db env's:
* GEOIP_COUNTRY_CODE
* GEOIP_COUNTRY_CODE3
* GEOIP_COUNTRY_NAME
* GEOIP_CITY_NAME
* GEOIP_CITY_POSTAL_CODE
* GEOIP_CITY_LATITUDE
* GEOIP_CITY_LONG_LATITUDE
* GEOIP_CITY_DMA_CODE
* GEOIP_CITY_AREA_CODE
*
* Usage (configuration options):
* geoip.db-filename = <path to the geoip or geocity database>
* geoip.memory-cache = <enable|disable> : default disabled
* if enabled, mod_geoip will load the database binary file to
* memory for very fast lookups. the only penalty is memory usage.
*
* Author:
* Ami E. Bizamcher (amix)
* duke.amix@gmail.com
*
* Note:
* GeoIP Library and API must be installed!
*
*
* Fully-rewritten from original
* Copyright(c) 2016 Glenn Strauss gstrauss()gluelogic.com All rights reserved
* License: BSD 3-clause (same as lighttpd)
*/
typedef struct {
GeoIP *gi;
} plugin_config;
typedef struct {
PLUGIN_DATA;
plugin_config defaults;
plugin_config conf;
} plugin_data;
INIT_FUNC(mod_geoip_init) {
return calloc(1, sizeof(plugin_data));
}
FREE_FUNC(mod_geoip_free) {
plugin_data * const p = p_d;
if (NULL == p->cvlist) return;
/* (init i to 0 if global context; to 1 to skip empty global context) */
for (int i = !p->cvlist[0].v.u2[1], used = p->nconfig; i < used; ++i) {
config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0];
for (; -1 != cpv->k_id; ++cpv) {
switch (cpv->k_id) {
case 0: /* geoip.db-filename */
if (cpv->vtype == T_CONFIG_LOCAL && NULL != cpv->v.v)
GeoIP_delete(cpv->v.v);
break;
default:
break;
}
}
}
}
static int mod_geoip_open_db(server *srv, config_plugin_value_t * const cpv, int mem_cache) {
/* country db filename is required! */
if (buffer_is_empty(cpv->v.b)) {
cpv->v.v = NULL;
return 1;
}
/* let's start cooking */
const int mode = (mem_cache)
? GEOIP_MEMORY_CACHE | GEOIP_CHECK_CACHE
: GEOIP_STANDARD | GEOIP_CHECK_CACHE;
GeoIP *gi = GeoIP_open(cpv->v.b->ptr, mode);
if (NULL == gi) {
log_error(srv->errh, __FILE__, __LINE__,
"failed to open GeoIP database!!!");
return 0;
}
/* is the db supported ? */
if ( gi->databaseType != GEOIP_COUNTRY_EDITION
&& gi->databaseType != GEOIP_CITY_EDITION_REV0
&& gi->databaseType != GEOIP_CITY_EDITION_REV1) {
log_error(srv->errh, __FILE__, __LINE__,
"GeoIP database is of unsupported type!!!");
GeoIP_delete(gi);
return 0;
}
cpv->vtype = T_CONFIG_LOCAL;
cpv->v.v = gi;
return 1;
}
static void mod_geoip_merge_config_cpv(plugin_config * const pconf, const config_plugin_value_t * const cpv) {
switch (cpv->k_id) { /* index into static config_plugin_keys_t cpk[] */
case 0: /* geoip.db-filename */
if (cpv->vtype != T_CONFIG_LOCAL) break;
pconf->gi = cpv->v.v;
break;
case 1: /* geoip.memory-cache */
break;
default:/* should not happen */
return;
}
}
static void mod_geoip_merge_config(plugin_config * const pconf, const config_plugin_value_t *cpv) {
do {
mod_geoip_merge_config_cpv(pconf, cpv);
} while ((++cpv)->k_id != -1);
}
static void mod_geoip_patch_config(request_st * const r, plugin_data * const p) {
p->conf = p->defaults; /* copy small struct instead of memcpy() */
/*memcpy(&p->conf, &p->defaults, sizeof(plugin_config));*/
for (int i = 1, used = p->nconfig; i < used; ++i) {
if (config_check_cond(r, (uint32_t)p->cvlist[i].k_id))
mod_geoip_merge_config(&p->conf, p->cvlist + p->cvlist[i].v.u2[0]);
}
}
SETDEFAULTS_FUNC(mod_geoip_set_defaults) {
static const config_plugin_keys_t cpk[] = {
{ CONST_STR_LEN("geoip.db-filename"),
T_CONFIG_STRING,
T_CONFIG_SCOPE_CONNECTION }
,{ CONST_STR_LEN("geoip.memory-cache"),
T_CONFIG_BOOL,
T_CONFIG_SCOPE_CONNECTION }
,{ NULL, 0,
T_CONFIG_UNSET,
T_CONFIG_SCOPE_UNSET }
};
plugin_data * const p = p_d;
if (!config_plugin_values_init(srv, p, cpk, "mod_geoip"))
return HANDLER_ERROR;
/* process and validate config directives
* (init i to 0 if global context; to 1 to skip empty global context) */
for (int i = !p->cvlist[0].v.u2[1]; i < p->nconfig; ++i) {
config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0];
config_plugin_value_t *fn = NULL;
int mem_cache = 0;
for (; -1 != cpv->k_id; ++cpv) {
switch (cpv->k_id) {
case 0: /* geoip.db-filename */
fn = cpv;
break;
case 1: /* geoip.memory-cache */
mem_cache = cpv->v.u;
break;
default:/* should not happen */
break;
}
}
if (fn) {
if (!mod_geoip_open_db(srv, fn, mem_cache))
return HANDLER_ERROR;
}
}
/* initialize p->defaults from global config context */
if (p->nconfig > 0 && p->cvlist->v.u2[1]) {
const config_plugin_value_t *cpv = p->cvlist + p->cvlist->v.u2[0];
if (-1 != cpv->k_id)
mod_geoip_merge_config(&p->defaults, cpv);
}
return HANDLER_GO_ON;
}
static handler_t mod_geoip_query (request_st * const r, plugin_data * const p) {
GeoIPRecord *gir;
const char *remote_ip = r->con->dst_addr_buf->ptr;
if (NULL != http_header_env_get(r, CONST_STR_LEN("GEOIP_COUNTRY_CODE"))) {
return HANDLER_GO_ON;
}
if (p->conf.gi->databaseType == GEOIP_COUNTRY_EDITION) {
const char *returnedCountry;
if (NULL != (returnedCountry = GeoIP_country_code_by_addr(p->conf.gi, remote_ip))) {
http_header_env_set(r, CONST_STR_LEN("GEOIP_COUNTRY_CODE"), returnedCountry, strlen(returnedCountry));
}
if (NULL != (returnedCountry = GeoIP_country_code3_by_addr(p->conf.gi, remote_ip))) {
http_header_env_set(r, CONST_STR_LEN("GEOIP_COUNTRY_CODE3"), returnedCountry, strlen(returnedCountry));
}
if (NULL != (returnedCountry = GeoIP_country_name_by_addr(p->conf.gi, remote_ip))) {
http_header_env_set(r, CONST_STR_LEN("GEOIP_COUNTRY_NAME"), returnedCountry, strlen(returnedCountry));
}
return HANDLER_GO_ON;
}
/* if we are here, geo city is in use */
if (NULL != (gir = GeoIP_record_by_addr(p->conf.gi, remote_ip))) {
http_header_env_set(r, CONST_STR_LEN("GEOIP_COUNTRY_CODE"), gir->country_code, strlen(gir->country_code));
http_header_env_set(r, CONST_STR_LEN("GEOIP_COUNTRY_CODE3"), gir->country_code3, strlen(gir->country_code3));
http_header_env_set(r, CONST_STR_LEN("GEOIP_COUNTRY_NAME"), gir->country_name, strlen(gir->country_name));
http_header_env_set(r, CONST_STR_LEN("GEOIP_CITY_REGION"), gir->region, strlen(gir->region));
http_header_env_set(r, CONST_STR_LEN("GEOIP_CITY_NAME"), gir->city, strlen(gir->city));
http_header_env_set(r, CONST_STR_LEN("GEOIP_CITY_POSTAL_CODE"), gir->postal_code, strlen(gir->postal_code));
{
char latitude[32];
snprintf(latitude, sizeof(latitude), "%f", gir->latitude);
http_header_env_set(r, CONST_STR_LEN("GEOIP_CITY_LATITUDE"), latitude, strlen(latitude));
}
{
char long_latitude[32];
snprintf(long_latitude, sizeof(long_latitude), "%f", gir->longitude);
http_header_env_set(r, CONST_STR_LEN("GEOIP_CITY_LONG_LATITUDE"), long_latitude, strlen(long_latitude));
}
{
char dc[LI_ITOSTRING_LENGTH];
http_header_env_set(r, CONST_STR_LEN("GEOIP_CITY_DMA_CODE"),
dc, li_utostrn(dc, sizeof(dc), gir->dma_code));
}
{
char ac[LI_ITOSTRING_LENGTH];
http_header_env_set(r, CONST_STR_LEN("GEOIP_CITY_AREA_CODE"),
ac, li_utostrn(ac, sizeof(ac), gir->area_code));
}
GeoIPRecord_delete(gir);
}
return HANDLER_GO_ON;
}
REQUEST_FUNC(mod_geoip_handle_request_env) {
plugin_data *p = p_d;
mod_geoip_patch_config(r, p);
return (p->conf.gi) ? mod_geoip_query(r, p) : HANDLER_GO_ON;
}
int mod_geoip_plugin_init(plugin *p);
int mod_geoip_plugin_init(plugin *p) {
p->version = LIGHTTPD_VERSION_ID;
p->name = "geoip";
p->init = mod_geoip_init;
p->handle_request_env = mod_geoip_handle_request_env;
p->set_defaults = mod_geoip_set_defaults;
p->cleanup = mod_geoip_free;
return 0;
}