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view src/http/modules/ngx_http_geoip_module.c @ 4727:1c7616100797 stable-1.2

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Merge of r4688, r4689, r4706: *) Mp4: fixed non-keyframe seeks in some cases (ticket #175). Number of entries in stsc atom was wrong if we've added an entry to split a chunk. Additionally, there is no need to add an entry if we are going to split last chunk in an entry, it's enough to update the entry we already have. Previously new entry was added and old one was left as is, resulting in incorrect entry with zero chunks which might confuse some software. *) Mp4: fixed streaming if moov atom is at buffer edge.
author Maxim Dounin <mdounin@mdounin.ru>
date Mon, 02 Jul 2012 16:56:53 +0000
parents a05e7b09af5a
children 880dedfa4008
line wrap: on
line source


/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>

#include <GeoIP.h>
#include <GeoIPCity.h>


typedef struct {
    GeoIP        *country;
    GeoIP        *org;
    GeoIP        *city;
    ngx_array_t  *proxies;    /* array of ngx_cidr_t */
    ngx_flag_t    proxy_recursive;
} ngx_http_geoip_conf_t;


typedef struct {
    ngx_str_t    *name;
    uintptr_t     data;
} ngx_http_geoip_var_t;


typedef char *(*ngx_http_geoip_variable_handler_pt)(GeoIP *, u_long addr);

static u_long ngx_http_geoip_addr(ngx_http_request_t *r,
    ngx_http_geoip_conf_t *gcf);
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_org_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_region_name_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 ngx_int_t ngx_http_geoip_city_int_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_init_conf(ngx_conf_t *cf, void *conf);
static char *ngx_http_geoip_country(ngx_conf_t *cf, ngx_command_t *cmd,
    void *conf);
static char *ngx_http_geoip_org(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 char *ngx_http_geoip_proxy(ngx_conf_t *cf, ngx_command_t *cmd,
    void *conf);
static ngx_int_t ngx_http_geoip_cidr_value(ngx_conf_t *cf, ngx_str_t *net,
    ngx_cidr_t *cidr);
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_TAKE12,
      ngx_http_geoip_country,
      NGX_HTTP_MAIN_CONF_OFFSET,
      0,
      NULL },

    { ngx_string("geoip_org"),
      NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE12,
      ngx_http_geoip_org,
      NGX_HTTP_MAIN_CONF_OFFSET,
      0,
      NULL },

    { ngx_string("geoip_city"),
      NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE12,
      ngx_http_geoip_city,
      NGX_HTTP_MAIN_CONF_OFFSET,
      0,
      NULL },

    { ngx_string("geoip_proxy"),
      NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
      ngx_http_geoip_proxy,
      NGX_HTTP_MAIN_CONF_OFFSET,
      0,
      NULL },

    { ngx_string("geoip_proxy_recursive"),
      NGX_HTTP_MAIN_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      NGX_HTTP_MAIN_CONF_OFFSET,
      offsetof(ngx_http_geoip_conf_t, proxy_recursive),
      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 */
    ngx_http_geoip_init_conf,              /* 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_org"), NULL,
      ngx_http_geoip_org_variable,
      (uintptr_t) GeoIP_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_region_name"), NULL,
      ngx_http_geoip_region_name_variable,
      0, 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_string("geoip_dma_code"), NULL,
      ngx_http_geoip_city_int_variable,
      offsetof(GeoIPRecord, dma_code), 0, 0 },

    { ngx_string("geoip_area_code"), NULL,
      ngx_http_geoip_city_int_variable,
      offsetof(GeoIPRecord, area_code), 0, 0 },

    { ngx_null_string, NULL, NULL, 0, 0, 0 }
};


static u_long
ngx_http_geoip_addr(ngx_http_request_t *r, ngx_http_geoip_conf_t *gcf)
{
    ngx_addr_t           addr;
    ngx_table_elt_t     *xfwd;
    struct sockaddr_in  *sin;

    addr.sockaddr = r->connection->sockaddr;
    addr.socklen = r->connection->socklen;
    /* addr.name = r->connection->addr_text; */

    xfwd = r->headers_in.x_forwarded_for;

    if (xfwd != NULL && gcf->proxies != NULL) {
        (void) ngx_http_get_forwarded_addr(r, &addr, xfwd->value.data,
                                           xfwd->value.len, gcf->proxies,
                                           gcf->proxy_recursive);
    }

#if (NGX_HAVE_INET6)

    if (addr.sockaddr->sa_family == AF_INET6) {
        struct in6_addr  *inaddr6;

        inaddr6 = &((struct sockaddr_in6 *) addr.sockaddr)->sin6_addr;

        if (IN6_IS_ADDR_V4MAPPED(inaddr6)) {
            return ntohl(*(in_addr_t *) &inaddr6->s6_addr[12]);
        }
    }

#endif

    if (addr.sockaddr->sa_family != AF_INET) {
        return INADDR_NONE;
    }

    sin = (struct sockaddr_in *) addr.sockaddr;
    return ntohl(sin->sin_addr.s_addr);
}


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;

    const char             *val;
    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;
    }

    val = handler(gcf->country, ngx_http_geoip_addr(r, gcf));

    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_org_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;

    size_t                  len;
    char                   *val;
    ngx_http_geoip_conf_t  *gcf;

    gcf = ngx_http_get_module_main_conf(r, ngx_http_geoip_module);

    if (gcf->org == NULL) {
        goto not_found;
    }

    val = handler(gcf->org, ngx_http_geoip_addr(r, gcf));

    if (val == NULL) {
        goto not_found;
    }

    len = ngx_strlen(val);
    v->data = ngx_pnalloc(r->pool, len);
    if (v->data == NULL) {
        ngx_free(val);
        return NGX_ERROR;
    }

    ngx_memcpy(v->data, val, len);

    v->len = len;
    v->valid = 1;
    v->no_cacheable = 0;
    v->not_found = 0;

    ngx_free(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_region_name_variable(ngx_http_request_t *r,
    ngx_http_variable_value_t *v, uintptr_t data)
{
    size_t        len;
    const char   *val;
    GeoIPRecord  *gr;

    gr = ngx_http_geoip_get_city_record(r);
    if (gr == NULL) {
        goto not_found;
    }

    val = GeoIP_region_name_by_code(gr->country_code, gr->region);

    GeoIPRecord_delete(gr);

    if (val == NULL) {
        goto not_found;
    }

    len = ngx_strlen(val);
    v->data = ngx_pnalloc(r->pool, len);
    if (v->data == NULL) {
        return NGX_ERROR;
    }

    ngx_memcpy(v->data, val, len);

    v->len = len;
    v->valid = 1;
    v->no_cacheable = 0;
    v->not_found = 0;

    return NGX_OK;

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 ngx_int_t
ngx_http_geoip_city_int_variable(ngx_http_request_t *r,
    ngx_http_variable_value_t *v, uintptr_t data)
{
    int           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);
    if (v->data == NULL) {
        GeoIPRecord_delete(gr);
        return NGX_ERROR;
    }

    val = *(int *) ((char *) gr + data);

    v->len = ngx_sprintf(v->data, "%d", val) - v->data;

    GeoIPRecord_delete(gr);

    return NGX_OK;
}


static GeoIPRecord *
ngx_http_geoip_get_city_record(ngx_http_request_t *r)
{
    ngx_http_geoip_conf_t  *gcf;

    gcf = ngx_http_get_module_main_conf(r, ngx_http_geoip_module);

    if (gcf->city) {
        return GeoIP_record_by_ipnum(gcf->city, ngx_http_geoip_addr(r, gcf));
    }

    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;
    }

    conf->proxy_recursive = NGX_CONF_UNSET;

    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_init_conf(ngx_conf_t *cf, void *conf)
{
    ngx_http_geoip_conf_t  *gcf = conf;

    ngx_conf_init_value(gcf->proxy_recursive, 0);

    return NGX_CONF_OK;
}


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,
                           "GeoIP_open(\"%V\") failed", &value[1]);

        return NGX_CONF_ERROR;
    }

    if (cf->args->nelts == 3) {
        if (ngx_strcmp(value[2].data, "utf8") == 0) {
            GeoIP_set_charset (gcf->country, GEOIP_CHARSET_UTF8);

        } else {
            ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                               "invalid parameter \"%V\"", &value[2]);
            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_org(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
    ngx_http_geoip_conf_t  *gcf = conf;

    ngx_str_t  *value;

    if (gcf->org) {
        return "is duplicate";
    }

    value = cf->args->elts;

    gcf->org = GeoIP_open((char *) value[1].data, GEOIP_MEMORY_CACHE);

    if (gcf->org == NULL) {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                           "GeoIP_open(\"%V\") failed", &value[1]);

        return NGX_CONF_ERROR;
    }

    if (cf->args->nelts == 3) {
        if (ngx_strcmp(value[2].data, "utf8") == 0) {
            GeoIP_set_charset (gcf->org, GEOIP_CHARSET_UTF8);

        } else {
            ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                               "invalid parameter \"%V\"", &value[2]);
            return NGX_CONF_ERROR;
        }
    }

    switch (gcf->org->databaseType) {

    case GEOIP_ISP_EDITION:
    case GEOIP_ORG_EDITION:
    case GEOIP_DOMAIN_EDITION:
    case GEOIP_ASNUM_EDITION:

        return NGX_CONF_OK;

    default:
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                           "invalid GeoIP database \"%V\" type:%d",
                           &value[1], gcf->org->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,
                           "GeoIP_open(\"%V\") failed", &value[1]);

        return NGX_CONF_ERROR;
    }

    if (cf->args->nelts == 3) {
        if (ngx_strcmp(value[2].data, "utf8") == 0) {
            GeoIP_set_charset (gcf->city, GEOIP_CHARSET_UTF8);

        } else {
            ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                               "invalid parameter \"%V\"", &value[2]);
            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 char *
ngx_http_geoip_proxy(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
    ngx_http_geoip_conf_t  *gcf = conf;

    ngx_str_t   *value;
    ngx_cidr_t  cidr, *c;

    value = cf->args->elts;

    if (ngx_http_geoip_cidr_value(cf, &value[1], &cidr) != NGX_OK) {
        return NGX_CONF_ERROR;
    }

    if (gcf->proxies == NULL) {
        gcf->proxies = ngx_array_create(cf->pool, 4, sizeof(ngx_cidr_t));
        if (gcf->proxies == NULL) {
            return NGX_CONF_ERROR;
        }
    }

    c = ngx_array_push(gcf->proxies);
    if (c == NULL) {
        return NGX_CONF_ERROR;
    }

    *c = cidr;

    return NGX_CONF_OK;
}

static ngx_int_t
ngx_http_geoip_cidr_value(ngx_conf_t *cf, ngx_str_t *net, ngx_cidr_t *cidr)
{
    ngx_int_t  rc;

    if (ngx_strcmp(net->data, "255.255.255.255") == 0) {
        cidr->family = AF_INET;
        cidr->u.in.addr = 0xffffffff;
        cidr->u.in.mask = 0xffffffff;

        return NGX_OK;
    }

    rc = ngx_ptocidr(net, cidr);

    if (rc == NGX_ERROR) {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid network \"%V\"", net);
        return NGX_ERROR;
    }

    if (rc == NGX_DONE) {
        ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
                           "low address bits of %V are meaningless", net);
    }

    return NGX_OK;
}


static void
ngx_http_geoip_cleanup(void *data)
{
    ngx_http_geoip_conf_t  *gcf = data;

    if (gcf->country) {
        GeoIP_delete(gcf->country);
    }

    if (gcf->org) {
        GeoIP_delete(gcf->org);
    }

    if (gcf->city) {
        GeoIP_delete(gcf->city);
    }
}