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Florin Corascea194d2017-10-02 00:18:51 -07001/*
2 * Copyright (c) 2017 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 <vnet/ip/ip.h>
17#include <vnet/fib/fib_table.h>
18
19u8
20ip_is_zero (ip46_address_t * ip46_address, u8 is_ip4)
21{
22 if (is_ip4)
23 return (ip46_address->ip4.as_u32 == 0);
24 else
25 return (ip46_address->as_u64[0] == 0 && ip46_address->as_u64[1] == 0);
26}
27
28u8
29ip_is_local_host (ip46_address_t * ip46_address, u8 is_ip4)
30{
31 if (is_ip4)
32 return (ip46_address->ip4.as_u8[0] == 127);
33 else
34 return (ip46_address->as_u64[0] == 0 && ip46_address->as_u64[1] == 1);
35}
36
37/**
38 * Checks that an ip is local to the requested fib
39 */
40u8
41ip_is_local (u32 fib_index, ip46_address_t * ip46_address, u8 is_ip4)
42{
43 fib_node_index_t fei;
44 fib_entry_flag_t flags;
45 fib_prefix_t prefix;
46
47 /* Check if requester is local */
48 if (is_ip4)
49 {
50 prefix.fp_len = 32;
51 prefix.fp_proto = FIB_PROTOCOL_IP4;
52 }
53 else
54 {
55 prefix.fp_len = 128;
56 prefix.fp_proto = FIB_PROTOCOL_IP6;
57 }
58
59 clib_memcpy (&prefix.fp_addr, ip46_address, sizeof (ip46_address_t));
60 fei = fib_table_lookup (0, &prefix);
61 flags = fib_entry_get_flags (fei);
62
63 return (flags & FIB_ENTRY_FLAG_LOCAL);
64}
65
Florin Coras3cbc04b2017-10-02 00:18:51 -070066void
67ip_copy (ip46_address_t * dst, ip46_address_t * src, u8 is_ip4)
68{
69 if (is_ip4)
70 dst->ip4.as_u32 = src->ip4.as_u32;
71 else
72 clib_memcpy (&dst->ip6, &src->ip6, sizeof (ip6_address_t));
73}
74
75void
76ip_set (ip46_address_t * dst, void *src, u8 is_ip4)
77{
78 if (is_ip4)
79 dst->ip4.as_u32 = ((ip4_address_t *) src)->as_u32;
80 else
81 clib_memcpy (&dst->ip6, (ip6_address_t *) src, sizeof (ip6_address_t));
82}
83
Florin Corascea194d2017-10-02 00:18:51 -070084u8
85ip_interface_has_address (u32 sw_if_index, ip46_address_t * ip, u8 is_ip4)
86{
87 ip_interface_address_t *ia = 0;
88
89 if (is_ip4)
90 {
91 ip_lookup_main_t *lm4 = &ip4_main.lookup_main;
92 ip4_address_t *ip4;
93 /* *INDENT-OFF* */
94 foreach_ip_interface_address (lm4, ia, sw_if_index, 1 /* unnumbered */ ,
95 ({
96 ip4 = ip_interface_address_get_address (lm4, ia);
97 if (ip4_address_compare (ip4, &ip->ip4) == 0)
98 return 1;
99 }));
100 /* *INDENT-ON* */
101 }
102 else
103 {
104 ip_lookup_main_t *lm6 = &ip6_main.lookup_main;
105 ip6_address_t *ip6;
106 /* *INDENT-OFF* */
107 foreach_ip_interface_address (lm6, ia, sw_if_index, 1 /* unnumbered */ ,
108 ({
109 ip6 = ip_interface_address_get_address (lm6, ia);
110 if (ip6_address_compare (ip6, &ip->ip6) == 0)
111 return 1;
112 }));
113 /* *INDENT-ON* */
114 }
115 return 0;
116}
117
Florin Coras3cbc04b2017-10-02 00:18:51 -0700118void *
119ip_interface_get_first_ip (u32 sw_if_index, u8 is_ip4)
Florin Corascea194d2017-10-02 00:18:51 -0700120{
Florin Coras3cbc04b2017-10-02 00:18:51 -0700121 ip_lookup_main_t *lm4 = &ip4_main.lookup_main;
122 ip_lookup_main_t *lm6 = &ip6_main.lookup_main;
123 ip_interface_address_t *ia = 0;
Florin Corascea194d2017-10-02 00:18:51 -0700124
Florin Corascea194d2017-10-02 00:18:51 -0700125 if (is_ip4)
Florin Coras3cbc04b2017-10-02 00:18:51 -0700126 {
127 /* *INDENT-OFF* */
128 foreach_ip_interface_address (lm4, ia, sw_if_index, 1 /* unnumbered */ ,
129 ({
130 return ip_interface_address_get_address (lm4, ia);
131 }));
132 /* *INDENT-ON* */
133 }
Florin Corascea194d2017-10-02 00:18:51 -0700134 else
Florin Coras3cbc04b2017-10-02 00:18:51 -0700135 {
136 /* *INDENT-OFF* */
137 foreach_ip_interface_address (lm6, ia, sw_if_index, 1 /* unnumbered */ ,
138 ({
139 ip6_address_t *rv;
140 rv = ip_interface_address_get_address (lm6, ia);
141 /* Trying to use a link-local ip6 src address is a fool's errand */
142 if (!ip6_address_is_link_local_unicast (rv))
143 return rv;
144 }));
145 /* *INDENT-ON* */
146 }
147
148 return 0;
Florin Corascea194d2017-10-02 00:18:51 -0700149}
150
151/*
152 * fd.io coding-style-patch-verification: ON
153 *
154 * Local Variables:
155 * eval: (c-set-style "gnu")
156 * End:
157 */