Line data    Source code

       1             : /*
       2             :  * Copyright (c) 2016 Cisco and/or its affiliates.
       3             :  * Licensed under the Apache License, Version 2.0 (the "License");
       4             :  * you may not use this file except in compliance with the License.
       5             :  * You may obtain a copy of the License at:
       6             :  *
       7             :  *     http://www.apache.org/licenses/LICENSE-2.0
       8             :  *
       9             :  * Unless required by applicable law or agreed to in writing, software
      10             :  * distributed under the License is distributed on an "AS IS" BASIS,
      11             :  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             :  * See the License for the specific language governing permissions and
      13             :  * limitations under the License.
      14             :  */
      15             : 
      16             : #include <lb/util.h>
      17             : 
      18         214 : void ip46_prefix_normalize(ip46_address_t *prefix, u8 plen)
      19             : {
      20         214 :   if (plen == 0) {
      21           0 :     prefix->as_u64[0] = 0;
      22           0 :     prefix->as_u64[1] = 0;
      23         214 :   } else if (plen <= 64) {
      24          87 :     prefix->as_u64[0] &= clib_host_to_net_u64(0xffffffffffffffffL << (64 - plen));
      25          87 :     prefix->as_u64[1] = 0;
      26             :   } else {
      27         127 :     prefix->as_u64[1] &= clib_host_to_net_u64(0xffffffffffffffffL << (128 - plen));
      28             :   }
      29             : 
      30         214 : }
      31             : 
      32         160 : uword unformat_ip46_prefix (unformat_input_t * input, va_list * args)
      33             : {
      34         160 :   ip46_address_t *ip46 = va_arg (*args, ip46_address_t *);
      35         160 :   u8 *len = va_arg (*args, u8 *);
      36         160 :   ip46_type_t type = va_arg (*args, ip46_type_t);
      37             : 
      38             :   u32 l;
      39         160 :   if ((type != IP46_TYPE_IP6) && unformat(input, "%U/%u", unformat_ip4_address, &ip46->ip4, &l)) {
      40          96 :     if (l > 32)
      41           0 :       return 0;
      42          96 :     *len = l + 96;
      43          96 :     ip46->pad[0] = ip46->pad[1] = ip46->pad[2] = 0;
      44          64 :   } else if ((type != IP46_TYPE_IP4) && unformat(input, "%U/%u", unformat_ip6_address, &ip46->ip6, &l)) {
      45          64 :     if (l > 128)
      46           0 :       return 0;
      47          64 :     *len = l;
      48             :   } else {
      49           0 :     return 0;
      50             :   }
      51         160 :   return 1;
      52             : }
      53             : 
      54        1391 : u8 *format_ip46_prefix (u8 * s, va_list * args)
      55             : {
      56        1391 :   ip46_address_t *ip46 = va_arg (*args, ip46_address_t *);
      57        1391 :   u32 len = va_arg (*args, u32); //va_arg cannot use u8 or u16
      58        1391 :   ip46_type_t type = va_arg (*args, ip46_type_t);
      59             : 
      60        1391 :   int is_ip4 = 0;
      61        1391 :   if (type == IP46_TYPE_IP4)
      62           0 :     is_ip4 = 1;
      63        1391 :   else if (type == IP46_TYPE_IP6)
      64           0 :     is_ip4 = 0;
      65             :   else
      66        1391 :     is_ip4 = (len >= 96) && ip46_address_is_ip4(ip46);
      67             : 
      68             :   return is_ip4 ?
      69        1906 :       format(s, "%U/%d", format_ip4_address, &ip46->ip4, len - 96):
      70         515 :       format(s, "%U/%d", format_ip6_address, &ip46->ip6, len);
      71             : }
      72             :