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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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.
16 #include <vnet/ip/ip.h>
17 #include <vnet/fib/fib_table.h>
20 ip_is_zero (ip46_address_t * ip46_address, u8 is_ip4)
23 return (ip46_address->ip4.as_u32 == 0);
25 return (ip46_address->as_u64[0] == 0 && ip46_address->as_u64[1] == 0);
29 ip_is_local_host (ip46_address_t * ip46_address, u8 is_ip4)
32 return (ip46_address->ip4.as_u8[0] == 127);
34 return (ip46_address->as_u64[0] == 0 &&
35 clib_net_to_host_u64 (ip46_address->as_u64[1]) == 1);
39 ip4_is_local_host (ip4_address_t * ip4_address)
41 return (ip4_address->as_u8[0] == 127);
45 ip6_is_local_host (ip6_address_t * ip6_address)
47 return (ip6_address->as_u64[0] == 0 &&
48 clib_net_to_host_u64 (ip6_address->as_u64[1]) == 1);
52 * Checks that an ip is local to the requested fib
55 ip_is_local (u32 fib_index, ip46_address_t * ip46_address, u8 is_ip4)
58 fib_entry_flag_t flags;
61 /* Check if requester is local */
65 prefix.fp_proto = FIB_PROTOCOL_IP4;
70 prefix.fp_proto = FIB_PROTOCOL_IP6;
73 clib_memcpy (&prefix.fp_addr, ip46_address, sizeof (ip46_address_t));
74 fei = fib_table_lookup (fib_index, &prefix);
75 flags = fib_entry_get_flags (fei);
77 return (flags & FIB_ENTRY_FLAG_LOCAL);
81 ip_copy (ip46_address_t * dst, ip46_address_t * src, u8 is_ip4)
84 dst->ip4.as_u32 = src->ip4.as_u32;
86 clib_memcpy (&dst->ip6, &src->ip6, sizeof (ip6_address_t));
90 ip_set (ip46_address_t * dst, void *src, u8 is_ip4)
93 dst->ip4.as_u32 = ((ip4_address_t *) src)->as_u32;
95 clib_memcpy (&dst->ip6, (ip6_address_t *) src, sizeof (ip6_address_t));
99 ip_interface_has_address (u32 sw_if_index, ip46_address_t * ip, u8 is_ip4)
101 ip_interface_address_t *ia = 0;
105 ip_lookup_main_t *lm4 = &ip4_main.lookup_main;
108 foreach_ip_interface_address (lm4, ia, sw_if_index, 1 /* unnumbered */ ,
110 ip4 = ip_interface_address_get_address (lm4, ia);
111 if (ip4_address_compare (ip4, &ip->ip4) == 0)
118 ip_lookup_main_t *lm6 = &ip6_main.lookup_main;
121 foreach_ip_interface_address (lm6, ia, sw_if_index, 1 /* unnumbered */ ,
123 ip6 = ip_interface_address_get_address (lm6, ia);
124 if (ip6_address_compare (ip6, &ip->ip6) == 0)
133 ip_interface_get_first_ip (u32 sw_if_index, u8 is_ip4)
135 ip_lookup_main_t *lm4 = &ip4_main.lookup_main;
136 ip_lookup_main_t *lm6 = &ip6_main.lookup_main;
137 ip_interface_address_t *ia = 0;
142 foreach_ip_interface_address (lm4, ia, sw_if_index, 1 /* unnumbered */ ,
144 return ip_interface_address_get_address (lm4, ia);
151 foreach_ip_interface_address (lm6, ia, sw_if_index, 1 /* unnumbered */ ,
154 rv = ip_interface_address_get_address (lm6, ia);
155 /* Trying to use a link-local ip6 src address is a fool's errand */
156 if (!ip6_address_is_link_local_unicast (rv))
166 ip4_address_normalize (ip4_address_t * ip4, u8 preflen)
168 ASSERT (preflen <= 32);
172 ip4->data_u32 &= clib_net_to_host_u32 (0xffffffff << (32 - preflen));
176 ip6_address_normalize (ip6_address_t * ip6, u8 preflen)
178 ASSERT (preflen <= 128);
184 else if (preflen <= 64)
187 clib_host_to_net_u64 (0xffffffffffffffffL << (64 - preflen));
192 clib_host_to_net_u64 (0xffffffffffffffffL << (128 - preflen));
196 ip4_preflen_to_mask (u8 pref_len, ip4_address_t * ip)
201 ip->as_u32 = clib_host_to_net_u32 (~((1 << (32 - pref_len)) - 1));
205 ip4_mask_to_preflen (ip4_address_t * mask)
207 if (mask->as_u32 == 0)
209 return (32 - log2_first_set (clib_net_to_host_u32 (mask->as_u32)));
213 ip4_prefix_max_address_host_order (ip4_address_t * ip, u8 plen,
217 not_mask = (1 << (32 - plen)) - 1;
218 res->as_u32 = clib_net_to_host_u32 (ip->as_u32) + not_mask;
222 ip6_preflen_to_mask (u8 pref_len, ip6_address_t * mask)
229 else if (pref_len <= 64)
232 clib_host_to_net_u64 (0xffffffffffffffffL << (64 - pref_len));
238 clib_host_to_net_u64 (0xffffffffffffffffL << (128 - pref_len));
243 ip6_prefix_max_address_host_order (ip6_address_t * ip, u8 plen,
249 res->as_u64[0] = 0xffffffffffffffffL;
250 res->as_u64[1] = 0xffffffffffffffffL;
254 not_mask = ((u64) 1 << (64 - plen)) - 1;
255 res->as_u64[0] = clib_net_to_host_u64 (ip->as_u64[0]) + not_mask;
256 res->as_u64[1] = 0xffffffffffffffffL;
260 not_mask = ((u64) 1 << (128 - plen)) - 1;
261 res->as_u64[1] = clib_net_to_host_u64 (ip->as_u64[1]) + not_mask;
266 ip6_mask_to_preflen (ip6_address_t * mask)
269 if (mask->as_u64[0] == 0 && mask->as_u64[1] == 0)
271 first1 = log2_first_set (clib_net_to_host_u64 (mask->as_u64[1]));
272 first0 = log2_first_set (clib_net_to_host_u64 (mask->as_u64[0]));
281 * fd.io coding-style-patch-verification: ON
284 * eval: (c-set-style "gnu")