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/*
* Copyright (c) 2017 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 <vnet/ip/ip.h>
#include <vnet/fib/fib_table.h>
u8
ip_is_zero (ip46_address_t * ip46_address, u8 is_ip4)
{
if (is_ip4)
return (ip46_address->ip4.as_u32 == 0);
else
return (ip46_address->as_u64[0] == 0 && ip46_address->as_u64[1] == 0);
}
u8
ip_is_local_host (ip46_address_t * ip46_address, u8 is_ip4)
{
if (is_ip4)
return (ip46_address->ip4.as_u8[0] == 127);
else
return (ip46_address->as_u64[0] == 0 && ip46_address->as_u64[1] == 1);
}
/**
* Checks that an ip is local to the requested fib
*/
u8
ip_is_local (u32 fib_index, ip46_address_t * ip46_address, u8 is_ip4)
{
fib_node_index_t fei;
fib_entry_flag_t flags;
fib_prefix_t prefix;
/* Check if requester is local */
if (is_ip4)
{
prefix.fp_len = 32;
prefix.fp_proto = FIB_PROTOCOL_IP4;
}
else
{
prefix.fp_len = 128;
prefix.fp_proto = FIB_PROTOCOL_IP6;
}
clib_memcpy (&prefix.fp_addr, ip46_address, sizeof (ip46_address_t));
fei = fib_table_lookup (0, &prefix);
flags = fib_entry_get_flags (fei);
return (flags & FIB_ENTRY_FLAG_LOCAL);
}
void
ip_copy (ip46_address_t * dst, ip46_address_t * src, u8 is_ip4)
{
if (is_ip4)
dst->ip4.as_u32 = src->ip4.as_u32;
else
clib_memcpy (&dst->ip6, &src->ip6, sizeof (ip6_address_t));
}
void
ip_set (ip46_address_t * dst, void *src, u8 is_ip4)
{
if (is_ip4)
dst->ip4.as_u32 = ((ip4_address_t *) src)->as_u32;
else
clib_memcpy (&dst->ip6, (ip6_address_t *) src, sizeof (ip6_address_t));
}
u8
ip_interface_has_address (u32 sw_if_index, ip46_address_t * ip, u8 is_ip4)
{
ip_interface_address_t *ia = 0;
if (is_ip4)
{
ip_lookup_main_t *lm4 = &ip4_main.lookup_main;
ip4_address_t *ip4;
/* *INDENT-OFF* */
foreach_ip_interface_address (lm4, ia, sw_if_index, 1 /* unnumbered */ ,
({
ip4 = ip_interface_address_get_address (lm4, ia);
if (ip4_address_compare (ip4, &ip->ip4) == 0)
return 1;
}));
/* *INDENT-ON* */
}
else
{
ip_lookup_main_t *lm6 = &ip6_main.lookup_main;
ip6_address_t *ip6;
/* *INDENT-OFF* */
foreach_ip_interface_address (lm6, ia, sw_if_index, 1 /* unnumbered */ ,
({
ip6 = ip_interface_address_get_address (lm6, ia);
if (ip6_address_compare (ip6, &ip->ip6) == 0)
return 1;
}));
/* *INDENT-ON* */
}
return 0;
}
void *
ip_interface_get_first_ip (u32 sw_if_index, u8 is_ip4)
{
ip_lookup_main_t *lm4 = &ip4_main.lookup_main;
ip_lookup_main_t *lm6 = &ip6_main.lookup_main;
ip_interface_address_t *ia = 0;
if (is_ip4)
{
/* *INDENT-OFF* */
foreach_ip_interface_address (lm4, ia, sw_if_index, 1 /* unnumbered */ ,
({
return ip_interface_address_get_address (lm4, ia);
}));
/* *INDENT-ON* */
}
else
{
/* *INDENT-OFF* */
foreach_ip_interface_address (lm6, ia, sw_if_index, 1 /* unnumbered */ ,
({
ip6_address_t *rv;
rv = ip_interface_address_get_address (lm6, ia);
/* Trying to use a link-local ip6 src address is a fool's errand */
if (!ip6_address_is_link_local_unicast (rv))
return rv;
}));
/* *INDENT-ON* */
}
return 0;
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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