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/*
* Copyright (c) 2016 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <lb/util.h>
void ip46_prefix_normalize(ip46_address_t *prefix, u8 plen)
{
if (plen == 0) {
prefix->as_u64[0] = 0;
prefix->as_u64[1] = 0;
} else if (plen <= 64) {
prefix->as_u64[0] &= clib_host_to_net_u64(0xffffffffffffffffL << (64 - plen));
prefix->as_u64[1] = 0;
} else {
prefix->as_u64[1] &= clib_host_to_net_u64(0xffffffffffffffffL << (128 - plen));
}
}
uword unformat_ip46_prefix (unformat_input_t * input, va_list * args)
{
ip46_address_t *ip46 = va_arg (*args, ip46_address_t *);
u8 *len = va_arg (*args, u8 *);
ip46_type_t type = va_arg (*args, ip46_type_t);
u32 l;
if ((type != IP46_TYPE_IP6) && unformat(input, "%U/%u", unformat_ip4_address, &ip46->ip4, &l)) {
if (l > 32)
return 0;
*len = l + 96;
ip46->pad[0] = ip46->pad[1] = ip46->pad[2] = 0;
} else if ((type != IP46_TYPE_IP4) && unformat(input, "%U/%u", unformat_ip6_address, &ip46->ip6, &l)) {
if (l > 128)
return 0;
*len = l;
} else {
return 0;
}
return 1;
}
u8 *format_ip46_prefix (u8 * s, va_list * args)
{
ip46_address_t *ip46 = va_arg (*args, ip46_address_t *);
u32 len = va_arg (*args, u32); //va_arg cannot use u8 or u16
ip46_type_t type = va_arg (*args, ip46_type_t);
int is_ip4 = 0;
if (type == IP46_TYPE_IP4)
is_ip4 = 1;
else if (type == IP46_TYPE_IP6)
is_ip4 = 0;
else
is_ip4 = (len >= 96) && ip46_address_is_ip4(ip46);
return is_ip4 ?
format(s, "%U/%d", format_ip4_address, &ip46->ip4, len - 96):
format(s, "%U/%d", format_ip6_address, &ip46->ip6, len);
}
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