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src/http/modules/ngx_http_realip_module.c  view on Meta::CPAN

    ngx_int_t                rc;
    ngx_str_t               *value;
    ngx_cidr_t              *cidr;

    value = cf->args->elts;

    if (rlcf->from == NULL) {
        rlcf->from = ngx_array_create(cf->pool, 2,
                                      sizeof(ngx_cidr_t));
        if (rlcf->from == NULL) {
            return NGX_CONF_ERROR;
        }
    }

    cidr = ngx_array_push(rlcf->from);
    if (cidr == NULL) {
        return NGX_CONF_ERROR;
    }

#if (NGX_HAVE_UNIX_DOMAIN)

    if (ngx_strcmp(value[1].data, "unix:") == 0) {
         cidr->family = AF_UNIX;
         return NGX_CONF_OK;
    }

#endif

    rc = ngx_ptocidr(&value[1], cidr);

    if (rc == NGX_ERROR) {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"",
                           &value[1]);
        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[1]);
    }

    return NGX_CONF_OK;
}


static char *
ngx_http_realip(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
    ngx_http_realip_loc_conf_t *rlcf = conf;

    ngx_str_t  *value;

    value = cf->args->elts;

    if (ngx_strcmp(value[1].data, "X-Real-IP") == 0) {
        rlcf->type = NGX_HTTP_REALIP_XREALIP;
        return NGX_CONF_OK;
    }

    if (ngx_strcmp(value[1].data, "X-Forwarded-For") == 0) {
        rlcf->type = NGX_HTTP_REALIP_XFWD;
        return NGX_CONF_OK;
    }

    if (ngx_strcmp(value[1].data, "proxy_protocol") == 0) {
        rlcf->type = NGX_HTTP_REALIP_PROXY;
        return NGX_CONF_OK;
    }

    rlcf->type = NGX_HTTP_REALIP_HEADER;
    rlcf->hash = ngx_hash_strlow(value[1].data, value[1].data, value[1].len);
    rlcf->header = value[1];

    return NGX_CONF_OK;
}


static void *
ngx_http_realip_create_loc_conf(ngx_conf_t *cf)
{
    ngx_http_realip_loc_conf_t  *conf;

    conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_realip_loc_conf_t));
    if (conf == NULL) {
        return NULL;
    }

    /*
     * set by ngx_pcalloc():
     *
     *     conf->from = NULL;
     *     conf->hash = 0;
     *     conf->header = { 0, NULL };
     */

    conf->type = NGX_CONF_UNSET_UINT;
    conf->recursive = NGX_CONF_UNSET;

    return conf;
}


static char *
ngx_http_realip_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
{
    ngx_http_realip_loc_conf_t  *prev = parent;
    ngx_http_realip_loc_conf_t  *conf = child;

    if (conf->from == NULL) {
        conf->from = prev->from;
    }

    ngx_conf_merge_uint_value(conf->type, prev->type, NGX_HTTP_REALIP_XREALIP);
    ngx_conf_merge_value(conf->recursive, prev->recursive, 0);

    if (conf->header.len == 0) {
        conf->hash = prev->hash;
        conf->header = prev->header;
    }