static void *
yy_sec_waf_parse_regex(ngx_conf_t *cf,
    ngx_str_t *tmp, ngx_http_yy_sec_waf_rule_t *rule)
{
    ngx_regex_compile_t *rgc;
    ngx_str_t            pattern;

    pattern.data = tmp->data + ngx_strlen(REGEX);
    pattern.len = tmp->len - ngx_strlen(REGEX);

    rgc = ngx_pcalloc(cf->pool, sizeof(ngx_regex_compile_t));
    if (!rgc)
        return NGX_CONF_ERROR;

    rgc->options = PCRE_CASELESS|PCRE_MULTILINE;
    rgc->pattern = pattern;
    rgc->pool = cf->pool;
    rgc->err.len = 0;
    rgc->err.data = NULL;

    rule->regex = ngx_http_regex_compile(cf, rgc);
    if (rule->regex == NULL)
        return NGX_CONF_ERROR;

    return NGX_CONF_OK;
}
static char * rdns_conf_rule(ngx_conf_t * cf, ngx_command_t * cmd, void * conf, int access_type) {
    ngx_http_rdns_loc_conf_t * loc_conf = conf;
    ngx_str_t * value;
    ngx_http_rdns_rule_t * rule;
    ngx_regex_compile_t rc;
    u_char errstr[NGX_MAX_CONF_ERRSTR];

    if (loc_conf == NULL) {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "internal error");
        ngx_conf_log_error(NGX_LOG_DEBUG, cf, 0, "location config NULL pointer");
        return NGX_CONF_ERROR;
    }

    value = cf->args->elts;

    if (loc_conf->rules == NULL) {
        loc_conf->rules = ngx_array_create(cf->pool, 1, sizeof(ngx_http_rdns_rule_t));
        if (loc_conf->rules == NULL) {
            ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "internal error");
            ngx_conf_log_error(NGX_LOG_DEBUG, cf, 0, "unable to allocate memory for rules array");
            return NGX_CONF_ERROR;
        }
    }

    rule = ngx_array_push(loc_conf->rules);
    if (rule == NULL) {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "internal error");
        ngx_conf_log_error(NGX_LOG_DEBUG, cf, 0, "unable to allocate memory for rule");
        return NGX_CONF_ERROR;
    }

    rule->access_type = access_type;
    rule->domain = value[1];

    ngx_memzero(&rc, sizeof(ngx_regex_compile_t));

    rc.pattern = rule->domain;
    rc.err.len = NGX_MAX_CONF_ERRSTR;
    rc.err.data = errstr;
    rc.options = NGX_REGEX_CASELESS;

    rule->domain_regex = ngx_http_regex_compile(cf, &rc);
    if (rule->domain_regex == NULL) {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "unable to compile regex rule");
        return NGX_CONF_ERROR;
    }

    ngx_conf_log_error(NGX_LOG_DEBUG, cf, 0, "using rule '%V'", &rule->domain);

    return NGX_CONF_OK;
}
static char *
ngx_http_rewrite_if_condition(ngx_conf_t *cf, ngx_http_rewrite_loc_conf_t *lcf)
{
    u_char                        *p;
    size_t                         len;
    ngx_str_t                     *value;
    ngx_uint_t                     cur, last;
    ngx_regex_compile_t            rc;
    ngx_http_script_code_pt       *code;
    ngx_http_script_file_code_t   *fop;
    ngx_http_script_regex_code_t  *regex;
    u_char                         errstr[NGX_MAX_CONF_ERRSTR];

    value = cf->args->elts;
    last = cf->args->nelts - 1;

    if (value[1].len < 1 || value[1].data[0] != '(') {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                           "invalid condition \"%V\"", &value[1]);
        return NGX_CONF_ERROR;
    }

    if (value[1].len == 1) {
        cur = 2;

    } else {
        cur = 1;
        value[1].len--;
        value[1].data++;
    }

    if (value[last].len < 1 || value[last].data[value[last].len - 1] != ')') {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                           "invalid condition \"%V\"", &value[last]);
        return NGX_CONF_ERROR;
    }

    if (value[last].len == 1) {
        last--;

    } else {
        value[last].len--;
        value[last].data[value[last].len] = '\0';
    }

    len = value[cur].len;
    p = value[cur].data;

    if (len > 1 && p[0] == '$') {

        if (cur != last && cur + 2 != last) {
            ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                               "invalid condition \"%V\"", &value[cur]);
            return NGX_CONF_ERROR;
        }

        if (ngx_http_rewrite_variable(cf, lcf, &value[cur]) != NGX_CONF_OK) {
            return NGX_CONF_ERROR;
        }

        if (cur == last) {
            return NGX_CONF_OK;
        }

        cur++;

        len = value[cur].len;
        p = value[cur].data;

        if (len == 1 && p[0] == '=') {

            if (ngx_http_rewrite_value(cf, lcf, &value[last]) != NGX_CONF_OK) {
                return NGX_CONF_ERROR;
            }

            code = ngx_http_script_start_code(cf->pool, &lcf->codes,
                                              sizeof(uintptr_t));
            if (code == NULL) {
                return NGX_CONF_ERROR;
            }

            *code = ngx_http_script_equal_code;

            return NGX_CONF_OK;
        }

        if (len == 2 && p[0] == '!' && p[1] == '=') {

            if (ngx_http_rewrite_value(cf, lcf, &value[last]) != NGX_CONF_OK) {
                return NGX_CONF_ERROR;
            }

            code = ngx_http_script_start_code(cf->pool, &lcf->codes,
                                              sizeof(uintptr_t));
            if (code == NULL) {
                return NGX_CONF_ERROR;
            }

            *code = ngx_http_script_not_equal_code;
            return NGX_CONF_OK;
        }

        if ((len == 1 && p[0] == '~')
            || (len == 2 && p[0] == '~' && p[1] == '*')
            || (len == 2 && p[0] == '!' && p[1] == '~')
            || (len == 3 && p[0] == '!' && p[1] == '~' && p[2] == '*'))
        {
            regex = ngx_http_script_start_code(cf->pool, &lcf->codes,
                                         sizeof(ngx_http_script_regex_code_t));
            if (regex == NULL) {
                return NGX_CONF_ERROR;
            }

            ngx_memzero(regex, sizeof(ngx_http_script_regex_code_t));

            ngx_memzero(&rc, sizeof(ngx_regex_compile_t));

            rc.pattern = value[last];
            rc.options = (p[len - 1] == '*') ? NGX_REGEX_CASELESS : 0;
            rc.err.len = NGX_MAX_CONF_ERRSTR;
            rc.err.data = errstr;

            regex->regex = ngx_http_regex_compile(cf, &rc);
            if (regex->regex == NULL) {
                return NGX_CONF_ERROR;
            }

            regex->code = ngx_http_script_regex_start_code;
            regex->next = sizeof(ngx_http_script_regex_code_t);
            regex->test = 1;
            if (p[0] == '!') {
                regex->negative_test = 1;
            }
            regex->name = value[last];

            return NGX_CONF_OK;
        }

        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                           "unexpected \"%V\" in condition", &value[cur]);
        return NGX_CONF_ERROR;

    } else if ((len == 2 && p[0] == '-')
               || (len == 3 && p[0] == '!' && p[1] == '-'))
    {
        if (cur + 1 != last) {
            ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                               "invalid condition \"%V\"", &value[cur]);
            return NGX_CONF_ERROR;
        }

        value[last].data[value[last].len] = '\0';
        value[last].len++;

        if (ngx_http_rewrite_value(cf, lcf, &value[last]) != NGX_CONF_OK) {
            return NGX_CONF_ERROR;
        }

        fop = ngx_http_script_start_code(cf->pool, &lcf->codes,
                                          sizeof(ngx_http_script_file_code_t));
        if (fop == NULL) {
            return NGX_CONF_ERROR;
        }

        fop->code = ngx_http_script_file_code;

        if (p[1] == 'f') {
            fop->op = ngx_http_script_file_plain;
            return NGX_CONF_OK;
        }

        if (p[1] == 'd') {
            fop->op = ngx_http_script_file_dir;
            return NGX_CONF_OK;
        }

        if (p[1] == 'e') {
            fop->op = ngx_http_script_file_exists;
            return NGX_CONF_OK;
        }

        if (p[1] == 'x') {
            fop->op = ngx_http_script_file_exec;
            return NGX_CONF_OK;
        }

        if (p[0] == '!') {
            if (p[2] == 'f') {
                fop->op = ngx_http_script_file_not_plain;
                return NGX_CONF_OK;
            }

            if (p[2] == 'd') {
                fop->op = ngx_http_script_file_not_dir;
                return NGX_CONF_OK;
            }

            if (p[2] == 'e') {
                fop->op = ngx_http_script_file_not_exists;
                return NGX_CONF_OK;
            }

            if (p[2] == 'x') {
                fop->op = ngx_http_script_file_not_exec;
                return NGX_CONF_OK;
            }
        }

        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                           "invalid condition \"%V\"", &value[cur]);
        return NGX_CONF_ERROR;
    }

    ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                       "invalid condition \"%V\"", &value[cur]);

    return NGX_CONF_ERROR;
}
static char *
ngx_http_rewrite(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
    ngx_http_rewrite_loc_conf_t  *lcf = conf;

    ngx_str_t                         *value;
    ngx_uint_t                         last;
    ngx_regex_compile_t                rc;
    ngx_http_script_code_pt           *code;
    ngx_http_script_compile_t          sc;
    ngx_http_script_regex_code_t      *regex;
    ngx_http_script_regex_end_code_t  *regex_end;
    u_char                             errstr[NGX_MAX_CONF_ERRSTR];

    regex = ngx_http_script_start_code(cf->pool, &lcf->codes,
                                       sizeof(ngx_http_script_regex_code_t));
    if (regex == NULL) {
        return NGX_CONF_ERROR;
    }

    ngx_memzero(regex, sizeof(ngx_http_script_regex_code_t));

    value = cf->args->elts;

    ngx_memzero(&rc, sizeof(ngx_regex_compile_t));

    rc.pattern = value[1];
    rc.err.len = NGX_MAX_CONF_ERRSTR;
    rc.err.data = errstr;

    /* TODO: NGX_REGEX_CASELESS */

    regex->regex = ngx_http_regex_compile(cf, &rc);
    if (regex->regex == NULL) {
        return NGX_CONF_ERROR;
    }

    regex->code = ngx_http_script_regex_start_code;
    regex->uri = 1;
    regex->name = value[1];

    if (value[2].data[value[2].len - 1] == '?') {

        /* the last "?" drops the original arguments */
        value[2].len--;

    } else {
        regex->add_args = 1;
    }

    last = 0;

    if (ngx_strncmp(value[2].data, "http://", sizeof("http://") - 1) == 0
        || ngx_strncmp(value[2].data, "https://", sizeof("https://") - 1) == 0
        || ngx_strncmp(value[2].data, "$scheme", sizeof("$scheme") - 1) == 0)
    {
        regex->status = NGX_HTTP_MOVED_TEMPORARILY;
        regex->redirect = 1;
        last = 1;
    }

    if (cf->args->nelts == 4) {
        if (ngx_strcmp(value[3].data, "last") == 0) {
            last = 1;

        } else if (ngx_strcmp(value[3].data, "break") == 0) {
            regex->break_cycle = 1;
            last = 1;

        } else if (ngx_strcmp(value[3].data, "redirect") == 0) {
            regex->status = NGX_HTTP_MOVED_TEMPORARILY;
            regex->redirect = 1;
            last = 1;

        } else if (ngx_strcmp(value[3].data, "permanent") == 0) {
            regex->status = NGX_HTTP_MOVED_PERMANENTLY;
            regex->redirect = 1;
            last = 1;

        } else {
            ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                               "invalid parameter \"%V\"", &value[3]);
            return NGX_CONF_ERROR;
        }
    }

    ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));

    sc.cf = cf;
    sc.source = &value[2];
    sc.lengths = &regex->lengths;
    sc.values = &lcf->codes;
    sc.variables = ngx_http_script_variables_count(&value[2]);
    sc.main = regex;
    sc.complete_lengths = 1;
    sc.compile_args = !regex->redirect;

    if (ngx_http_script_compile(&sc) != NGX_OK) {
        return NGX_CONF_ERROR;
    }

    regex = sc.main;

    regex->size = sc.size;
    regex->args = sc.args;

    if (sc.variables == 0 && !sc.dup_capture) {
        regex->lengths = NULL;
    }

    regex_end = ngx_http_script_add_code(lcf->codes,
                                      sizeof(ngx_http_script_regex_end_code_t),
                                      &regex);
    if (regex_end == NULL) {
        return NGX_CONF_ERROR;
    }

    regex_end->code = ngx_http_script_regex_end_code;
    regex_end->uri = regex->uri;
    regex_end->args = regex->args;
    regex_end->add_args = regex->add_args;
    regex_end->redirect = regex->redirect;

    if (last) {
        code = ngx_http_script_add_code(lcf->codes, sizeof(uintptr_t), &regex);
        if (code == NULL) {
            return NGX_CONF_ERROR;
        }

        *code = NULL;
    }

    regex->next = (u_char *) lcf->codes->elts + lcf->codes->nelts
                                              - (u_char *) regex;

    return NGX_CONF_OK;
}
Beispiel #5
0
static char *
ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf)
{
    ngx_int_t                   rc, index;
    ngx_str_t                  *value, file, name;
    ngx_uint_t                  i, key;
    ngx_http_map_conf_ctx_t    *ctx;
    ngx_http_variable_value_t  *var, **vp;

    ctx = cf->ctx;

    value = cf->args->elts;

    if (cf->args->nelts == 1
        && ngx_strcmp(value[0].data, "hostnames") == 0)
    {
        ctx->hostnames = 1;
        return NGX_CONF_OK;

    } else if (cf->args->nelts != 2) {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                           "invalid number of the map parameters");
        return NGX_CONF_ERROR;
    }

    if (ngx_strcmp(value[0].data, "include") == 0) {
        file = value[1];

        if (ngx_conf_full_name(cf->cycle, &file, 1) != NGX_OK) {
            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 (value[1].data[0] == '$') {
        name = value[1];
        name.len--;
        name.data++;

        index = ngx_http_get_variable_index(ctx->cf, &name);
        if (index == NGX_ERROR) {
            return NGX_CONF_ERROR;
        }

        var = ctx->var_values.elts;

        for (i = 0; i < ctx->var_values.nelts; i++) {
            if (index == (ngx_int_t) var[i].data) {
                goto found;
            }
        }

        var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t));
        if (var == NULL) {
            return NGX_CONF_ERROR;
        }

        var->valid = 0;
        var->no_cacheable = 0;
        var->not_found = 0;
        var->len = 0;
        var->data = (u_char *) index;

        vp = ngx_array_push(&ctx->var_values);
        if (vp == NULL) {
            return NGX_CONF_ERROR;
        }

        *vp = var;

        goto found;
    }

    key = 0;

    for (i = 0; i < value[1].len; i++) {
        key = ngx_hash(key, value[1].data[i]);
    }

    key %= ctx->keys.hsize;

    vp = ctx->values_hash[key].elts;

    if (vp) {
        for (i = 0; i < ctx->values_hash[key].nelts; i++) {
            if (value[1].len != (size_t) vp[i]->len) {
                continue;
            }

            if (ngx_strncmp(value[1].data, vp[i]->data, value[1].len) == 0) {
                var = vp[i];
                goto found;
            }
        }

    } else {
        if (ngx_array_init(&ctx->values_hash[key], cf->pool, 4,
                           sizeof(ngx_http_variable_value_t *))
            != NGX_OK)
        {
            return NGX_CONF_ERROR;
        }
    }

    var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t));
    if (var == NULL) {
        return NGX_CONF_ERROR;
    }

    var->len = value[1].len;
    var->data = ngx_pstrdup(ctx->keys.pool, &value[1]);
    if (var->data == NULL) {
        return NGX_CONF_ERROR;
    }

    var->valid = 1;
    var->no_cacheable = 0;
    var->not_found = 0;

    vp = ngx_array_push(&ctx->values_hash[key]);
    if (vp == NULL) {
        return NGX_CONF_ERROR;
    }

    *vp = var;

found:

    if (ngx_strcmp(value[0].data, "default") == 0) {

        if (ctx->default_value) {
            ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                               "duplicate default map parameter");
            return NGX_CONF_ERROR;
        }

        ctx->default_value = var;

        return NGX_CONF_OK;
    }

#if (NGX_PCRE)

    if (value[0].len && value[0].data[0] == '~') {
        ngx_regex_compile_t    rc;
        ngx_http_map_regex_t  *regex;
        u_char                 errstr[NGX_MAX_CONF_ERRSTR];

        regex = ngx_array_push(&ctx->regexes);
        if (regex == NULL) {
            return NGX_CONF_ERROR;
        }

        value[0].len--;
        value[0].data++;

        ngx_memzero(&rc, sizeof(ngx_regex_compile_t));

        rc.pattern = value[0];
        rc.err.len = NGX_MAX_CONF_ERRSTR;
        rc.err.data = errstr;

        regex->regex = ngx_http_regex_compile(ctx->cf, &rc);
        if (regex->regex == NULL) {
            return NGX_CONF_ERROR;
        }

        regex->value = var;

        return NGX_CONF_OK;
    }

#endif

    if (value[0].len && value[0].data[0] == '\\') {
        value[0].len--;
        value[0].data++;
    }

    rc = ngx_hash_add_key(&ctx->keys, &value[0], var,
                          (ctx->hostnames) ? NGX_HASH_WILDCARD_KEY : 0);

    if (rc == NGX_OK) {
        return NGX_CONF_OK;
    }

    if (rc == NGX_DECLINED) {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                           "invalid hostname or wildcard \"%V\"", &value[0]);
    }

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

    return NGX_CONF_ERROR;
}
static char *
ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf)
{
    u_char                            *data;
    size_t                             len;
    ngx_int_t                          rv;
    ngx_str_t                         *value, v;
    ngx_uint_t                         i, key;
    ngx_http_map_conf_ctx_t           *ctx;
    ngx_http_complex_value_t           cv, *cvp;
    ngx_http_variable_value_t         *var, **vp;
    ngx_http_compile_complex_value_t   ccv;

    ctx = cf->ctx;

    value = cf->args->elts;

    if (cf->args->nelts == 1
        && ngx_strcmp(value[0].data, "hostnames") == 0)
    {
        ctx->hostnames = 1;
        return NGX_CONF_OK;
    }

    if (cf->args->nelts == 1
        && ngx_strcmp(value[0].data, "volatile") == 0)
    {
        ctx->no_cacheable = 1;
        return NGX_CONF_OK;
    }

    if (cf->args->nelts != 2) {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                           "invalid number of the map parameters");
        return NGX_CONF_ERROR;
    }

    if (ngx_strcmp(value[0].data, "include") == 0) {
        return ngx_conf_include(cf, dummy, conf);
    }

    key = 0;

    for (i = 0; i < value[1].len; i++) {
        key = ngx_hash(key, value[1].data[i]);
    }

    key %= ctx->keys.hsize;

    vp = ctx->values_hash[key].elts;

    if (vp) {
        for (i = 0; i < ctx->values_hash[key].nelts; i++) {

            if (vp[i]->valid) {
                data = vp[i]->data;
                len = vp[i]->len;

            } else {
                cvp = (ngx_http_complex_value_t *) vp[i]->data;
                data = cvp->value.data;
                len = cvp->value.len;
            }

            if (value[1].len != len) {
                continue;
            }

            if (ngx_strncmp(value[1].data, data, len) == 0) {
                var = vp[i];
                goto found;
            }
        }

    } else {
        if (ngx_array_init(&ctx->values_hash[key], cf->pool, 4,
                           sizeof(ngx_http_variable_value_t *))
            != NGX_OK)
        {
            return NGX_CONF_ERROR;
        }
    }

    var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t));
    if (var == NULL) {
        return NGX_CONF_ERROR;
    }

    v.len = value[1].len;
    v.data = ngx_pstrdup(ctx->keys.pool, &value[1]);
    if (v.data == NULL) {
        return NGX_CONF_ERROR;
    }

    ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));

    ccv.cf = ctx->cf;
    ccv.value = &v;
    ccv.complex_value = &cv;

    if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
        return NGX_CONF_ERROR;
    }

    if (cv.lengths != NULL) {
        cvp = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_complex_value_t));
        if (cvp == NULL) {
            return NGX_CONF_ERROR;
        }

        *cvp = cv;

        var->len = 0;
        var->data = (u_char *) cvp;
        var->valid = 0;

    } else {
        var->len = v.len;
        var->data = v.data;
        var->valid = 1;
    }

    var->no_cacheable = 0;
    var->not_found = 0;

    vp = ngx_array_push(&ctx->values_hash[key]);
    if (vp == NULL) {
        return NGX_CONF_ERROR;
    }

    *vp = var;

found:

    if (ngx_strcmp(value[0].data, "default") == 0) {

        if (ctx->default_value) {
            ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                               "duplicate default map parameter");
            return NGX_CONF_ERROR;
        }

        ctx->default_value = var;

        return NGX_CONF_OK;
    }

#if (NGX_PCRE)

    if (value[0].len && value[0].data[0] == '~') {
        ngx_regex_compile_t    rc;
        ngx_http_map_regex_t  *regex;
        u_char                 errstr[NGX_MAX_CONF_ERRSTR];

        regex = ngx_array_push(&ctx->regexes);
        if (regex == NULL) {
            return NGX_CONF_ERROR;
        }

        value[0].len--;
        value[0].data++;

        ngx_memzero(&rc, sizeof(ngx_regex_compile_t));

        if (value[0].data[0] == '*') {
            value[0].len--;
            value[0].data++;
            rc.options = NGX_REGEX_CASELESS;
        }

        rc.pattern = value[0];
        rc.err.len = NGX_MAX_CONF_ERRSTR;
        rc.err.data = errstr;

        regex->regex = ngx_http_regex_compile(ctx->cf, &rc);
        if (regex->regex == NULL) {
            return NGX_CONF_ERROR;
        }

        regex->value = var;

        return NGX_CONF_OK;
    }

#endif

    if (value[0].len && value[0].data[0] == '\\') {
        value[0].len--;
        value[0].data++;
    }

    rv = ngx_hash_add_key(&ctx->keys, &value[0], var,
                          (ctx->hostnames) ? NGX_HASH_WILDCARD_KEY : 0);

    if (rv == NGX_OK) {
        return NGX_CONF_OK;
    }

    if (rv == NGX_DECLINED) {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                           "invalid hostname or wildcard \"%V\"", &value[0]);
    }

    if (rv == NGX_BUSY) {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                           "conflicting parameter \"%V\"", &value[0]);
    }

    return NGX_CONF_ERROR;
}