FD.io VPP  v20.05.1-6-gf53edbc3b
Vector Packet Processing
ip.c
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1 /*
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 
19 u8
20 ip_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 
28 u8
29 ip_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 &&
35  clib_net_to_host_u64 (ip46_address->as_u64[1]) == 1);
36 }
37 
38 u8
40 {
41  return (ip4_address->as_u8[0] == 127);
42 }
43 
44 u8
45 ip6_is_local_host (ip6_address_t * ip6_address)
46 {
47  return (ip6_address->as_u64[0] == 0 &&
48  clib_net_to_host_u64 (ip6_address->as_u64[1]) == 1);
49 }
50 
51 /**
52  * Checks that an ip is local to the requested fib
53  */
54 u8
55 ip_is_local (u32 fib_index, ip46_address_t * ip46_address, u8 is_ip4)
56 {
57  fib_node_index_t fei;
60 
61  /* Check if requester is local */
62  if (is_ip4)
63  {
64  prefix.fp_len = 32;
65  prefix.fp_proto = FIB_PROTOCOL_IP4;
66  }
67  else
68  {
69  prefix.fp_len = 128;
70  prefix.fp_proto = FIB_PROTOCOL_IP6;
71  }
72 
73  clib_memcpy_fast (&prefix.fp_addr, ip46_address, sizeof (ip46_address_t));
74  fei = fib_table_lookup (fib_index, &prefix);
75  flags = fib_entry_get_flags (fei);
76 
77  return (flags & FIB_ENTRY_FLAG_LOCAL);
78 }
79 
80 void
81 ip_copy (ip46_address_t * dst, ip46_address_t * src, u8 is_ip4)
82 {
83  if (is_ip4)
84  dst->ip4.as_u32 = src->ip4.as_u32;
85  else
86  clib_memcpy_fast (&dst->ip6, &src->ip6, sizeof (ip6_address_t));
87 }
88 
89 void
90 ip_set (ip46_address_t * dst, void *src, u8 is_ip4)
91 {
92  if (is_ip4)
93  dst->ip4.as_u32 = ((ip4_address_t *) src)->as_u32;
94  else
95  clib_memcpy_fast (&dst->ip6, (ip6_address_t *) src,
96  sizeof (ip6_address_t));
97 }
98 
99 u8 *
100 format_ip_address_family (u8 * s, va_list * args)
101 {
102  ip_address_family_t af = va_arg (*args, int); // int promo ip_address_family_t);
103 
104  switch (af)
105  {
106  case AF_IP4:
107  return (format (s, "ip4"));
108  case AF_IP6:
109  return (format (s, "ip6"));
110  }
111 
112  return (format (s, "unknown"));
113 }
114 
115 uword
117 {
118  ip_address_family_t *af = va_arg (*args, ip_address_family_t *);
119 
120  if (unformat (input, "ip4") || unformat (input, "ipv4") ||
121  unformat (input, "IP4") || unformat (input, "IPv4"))
122  {
123  *af = AF_IP4;
124  return (1);
125  }
126  else if (unformat (input, "ip6") || unformat (input, "ipv6") ||
127  unformat (input, "IP6") || unformat (input, "IPv6"))
128  {
129  *af = AF_IP6;
130  return (1);
131  }
132  return (0);
133 }
134 
135 u8 *
136 format_ip_dscp (u8 * s, va_list * va)
137 {
138  ip_dscp_t dscp = va_arg (*va, u32); // int promotion of u8
139 
140  switch (dscp)
141  {
142 #define _(n,v) \
143  case IP_DSCP_##v: \
144  return (format (s, "%s", #v));
146 #undef _
147  }
148 
149  return (format (s, "unknown"));
150 }
151 
152 u8 *
153 format_ip_ecn (u8 * s, va_list * va)
154 {
155  ip_ecn_t ecn = va_arg (*va, u32); // int promotion of u8
156 
157  switch (ecn)
158  {
159 #define _(n,v) \
160  case IP_ECN_##v: \
161  return (format (s, "%s", #v));
163 #undef _
164  }
165 
166  return (format (s, "unknown"));
167 }
168 
169 /*
170  * fd.io coding-style-patch-verification: ON
171  *
172  * Local Variables:
173  * eval: (c-set-style "gnu")
174  * End:
175  */
fib_protocol_t fp_proto
protocol type
Definition: fib_types.h:212
void ip_copy(ip46_address_t *dst, ip46_address_t *src, u8 is_ip4)
Definition: ip.c:81
u8 ip_is_local(u32 fib_index, ip46_address_t *ip46_address, u8 is_ip4)
Checks that an ip is local to the requested fib.
Definition: ip.c:55
void ip_set(ip46_address_t *dst, void *src, u8 is_ip4)
Definition: ip.c:90
#define clib_memcpy_fast(a, b, c)
Definition: string.h:81
manual_print typedef u8 ip4_address[4]
Definition: ip_types.api:18
vl_api_address_t src
Definition: gre.api:54
enum ip_ecn_t_ ip_ecn_t
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
vl_api_prefix_t prefix
Definition: ip.api:144
unsigned char u8
Definition: types.h:56
Aggregate type for a prefix.
Definition: fib_types.h:203
unsigned int u32
Definition: types.h:88
u16 fp_len
The mask length.
Definition: fib_types.h:207
fib_node_index_t fib_table_lookup(u32 fib_index, const fib_prefix_t *prefix)
Perfom a longest prefix match in the non-forwarding table.
Definition: fib_table.c:68
u8 * format_ip_dscp(u8 *s, va_list *va)
Definition: ip.c:136
vl_api_ip_dscp_t dscp
Definition: dhcp.api:163
Definition: fib_entry.h:117
ip46_address_t fp_addr
The address type is not deriveable from the fp_addr member.
Definition: fib_types.h:226
struct _unformat_input_t unformat_input_t
u8 * format_ip_address_family(u8 *s, va_list *args)
Definition: ip.c:100
vl_api_address_t dst
Definition: gre.api:55
uword unformat_ip_address_family(unformat_input_t *input, va_list *args)
Definition: ip.c:116
u32 flags
Definition: vhost_user.h:248
u8 * format_ip_ecn(u8 *s, va_list *va)
Definition: ip.c:153
u8 ip4_is_local_host(ip4_address_t *ip4_address)
Definition: ip.c:39
u32 fib_node_index_t
A typedef of a node index.
Definition: fib_types.h:30
u8 ip6_is_local_host(ip6_address_t *ip6_address)
Definition: ip.c:45
enum fib_entry_flag_t_ fib_entry_flag_t
manual_print typedef u8 ip6_address[16]
Definition: ip_types.api:19
enum ip_dscp_t_ ip_dscp_t
enum ip_address_family_t_ ip_address_family_t
u8 ip_is_zero(ip46_address_t *ip46_address, u8 is_ip4)
Definition: ip.c:20
u64 uword
Definition: types.h:112
u8 ip_is_local_host(ip46_address_t *ip46_address, u8 is_ip4)
Definition: ip.c:29
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:978
fib_entry_flag_t fib_entry_get_flags(fib_node_index_t fib_entry_index)
Definition: fib_entry.c:291