1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
|
/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _RTE_ETHER_H_
#define _RTE_ETHER_H_
/**
* @file
*
* Ethernet Helpers in RTE
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
#include <stdio.h>
#include <rte_memcpy.h>
#include <rte_random.h>
#define ETHER_ADDR_LEN 6 /**< Length of Ethernet address. */
#define ETHER_TYPE_LEN 2 /**< Length of Ethernet type field. */
#define ETHER_CRC_LEN 4 /**< Length of Ethernet CRC. */
#define ETHER_HDR_LEN \
(ETHER_ADDR_LEN * 2 + ETHER_TYPE_LEN) /**< Length of Ethernet header. */
#define ETHER_MIN_LEN 64 /**< Minimum frame len, including CRC. */
#define ETHER_MAX_LEN 1518 /**< Maximum frame len, including CRC. */
#define ETHER_MTU \
(ETHER_MAX_LEN - ETHER_HDR_LEN - ETHER_CRC_LEN) /**< Ethernet MTU. */
#define ETHER_MAX_VLAN_FRAME_LEN \
(ETHER_MAX_LEN + 4) /**< Maximum VLAN frame length, including CRC. */
#define ETHER_MAX_JUMBO_FRAME_LEN \
0x3F00 /**< Maximum Jumbo frame length, including CRC. */
#define ETHER_MAX_VLAN_ID 4095 /**< Maximum VLAN ID. */
#define ETHER_MIN_MTU 68 /**< Minimum MTU for IPv4 packets, see RFC 791. */
/**
* Ethernet address:
* A universally administered address is uniquely assigned to a device by its
* manufacturer. The first three octets (in transmission order) contain the
* Organizationally Unique Identifier (OUI). The following three (MAC-48 and
* EUI-48) octets are assigned by that organization with the only constraint
* of uniqueness.
* A locally administered address is assigned to a device by a network
* administrator and does not contain OUIs.
* See http://standards.ieee.org/regauth/groupmac/tutorial.html
*/
struct ether_addr {
uint8_t addr_bytes[ETHER_ADDR_LEN]; /**< Address bytes in transmission order */
} __attribute__((__packed__));
#define ETHER_LOCAL_ADMIN_ADDR 0x02 /**< Locally assigned Eth. address. */
#define ETHER_GROUP_ADDR 0x01 /**< Multicast or broadcast Eth. address. */
/**
* Check if two Ethernet addresses are the same.
*
* @param ea1
* A pointer to the first ether_addr structure containing
* the ethernet address.
* @param ea2
* A pointer to the second ether_addr structure containing
* the ethernet address.
*
* @return
* True (1) if the given two ethernet address are the same;
* False (0) otherwise.
*/
static inline int is_same_ether_addr(const struct ether_addr *ea1,
const struct ether_addr *ea2)
{
int i;
for (i = 0; i < ETHER_ADDR_LEN; i++)
if (ea1->addr_bytes[i] != ea2->addr_bytes[i])
return 0;
return 1;
}
/**
* Check if an Ethernet address is filled with zeros.
*
* @param ea
* A pointer to a ether_addr structure containing the ethernet address
* to check.
* @return
* True (1) if the given ethernet address is filled with zeros;
* false (0) otherwise.
*/
static inline int is_zero_ether_addr(const struct ether_addr *ea)
{
int i;
for (i = 0; i < ETHER_ADDR_LEN; i++)
if (ea->addr_bytes[i] != 0x00)
return 0;
return 1;
}
/**
* Check if an Ethernet address is a unicast address.
*
* @param ea
* A pointer to a ether_addr structure containing the ethernet address
* to check.
* @return
* True (1) if the given ethernet address is a unicast address;
* false (0) otherwise.
*/
static inline int is_unicast_ether_addr(const struct ether_addr *ea)
{
return ((ea->addr_bytes[0] & ETHER_GROUP_ADDR) == 0);
}
/**
* Check if an Ethernet address is a multicast address.
*
* @param ea
* A pointer to a ether_addr structure containing the ethernet address
* to check.
* @return
* True (1) if the given ethernet address is a multicast address;
* false (0) otherwise.
*/
static inline int is_multicast_ether_addr(const struct ether_addr *ea)
{
return (ea->addr_bytes[0] & ETHER_GROUP_ADDR);
}
/**
* Check if an Ethernet address is a broadcast address.
*
* @param ea
* A pointer to a ether_addr structure containing the ethernet address
* to check.
* @return
* True (1) if the given ethernet address is a broadcast address;
* false (0) otherwise.
*/
static inline int is_broadcast_ether_addr(const struct ether_addr *ea)
{
const uint16_t *ea_words = (const uint16_t *)ea;
return (ea_words[0] == 0xFFFF && ea_words[1] == 0xFFFF &&
ea_words[2] == 0xFFFF);
}
/**
* Check if an Ethernet address is a universally assigned address.
*
* @param ea
* A pointer to a ether_addr structure containing the ethernet address
* to check.
* @return
* True (1) if the given ethernet address is a universally assigned address;
* false (0) otherwise.
*/
static inline int is_universal_ether_addr(const struct ether_addr *ea)
{
return ((ea->addr_bytes[0] & ETHER_LOCAL_ADMIN_ADDR) == 0);
}
/**
* Check if an Ethernet address is a locally assigned address.
*
* @param ea
* A pointer to a ether_addr structure containing the ethernet address
* to check.
* @return
* True (1) if the given ethernet address is a locally assigned address;
* false (0) otherwise.
*/
static inline int is_local_admin_ether_addr(const struct ether_addr *ea)
{
return ((ea->addr_bytes[0] & ETHER_LOCAL_ADMIN_ADDR) != 0);
}
/**
* Check if an Ethernet address is a valid address. Checks that the address is a
* unicast address and is not filled with zeros.
*
* @param ea
* A pointer to a ether_addr structure containing the ethernet address
* to check.
* @return
* True (1) if the given ethernet address is valid;
* false (0) otherwise.
*/
static inline int is_valid_assigned_ether_addr(const struct ether_addr *ea)
{
return (is_unicast_ether_addr(ea) && (! is_zero_ether_addr(ea)));
}
/**
* Generate a random Ethernet address that is locally administered
* and not multicast.
* @param addr
* A pointer to Ethernet address.
*/
static inline void eth_random_addr(uint8_t *addr)
{
uint64_t rand = rte_rand();
uint8_t *p = (uint8_t*)&rand;
rte_memcpy(addr, p, ETHER_ADDR_LEN);
addr[0] &= ~ETHER_GROUP_ADDR; /* clear multicast bit */
addr[0] |= ETHER_LOCAL_ADMIN_ADDR; /* set local assignment bit */
}
/**
* Fast copy an Ethernet address.
*
* @param ea_from
* A pointer to a ether_addr structure holding the Ethernet address to copy.
* @param ea_to
* A pointer to a ether_addr structure where to copy the Ethernet address.
*/
static inline void ether_addr_copy(const struct ether_addr *ea_from,
struct ether_addr *ea_to)
{
#ifdef __INTEL_COMPILER
uint16_t *from_words = (uint16_t *)(ea_from->addr_bytes);
uint16_t *to_words = (uint16_t *)(ea_to->addr_bytes);
to_words[0] = from_words[0];
to_words[1] = from_words[1];
to_words[2] = from_words[2];
#else
/*
* Use the common way, because of a strange gcc warning.
*/
*ea_to = *ea_from;
#endif
}
#define ETHER_ADDR_FMT_SIZE 18
/**
* Format 48bits Ethernet address in pattern xx:xx:xx:xx:xx:xx.
*
* @param buf
* A pointer to buffer contains the formatted MAC address.
* @param size
* The format buffer size.
* @param ea_to
* A pointer to a ether_addr structure.
*/
static inline void
ether_format_addr(char *buf, uint16_t size,
const struct ether_addr *eth_addr)
{
snprintf(buf, size, "%02X:%02X:%02X:%02X:%02X:%02X",
eth_addr->addr_bytes[0],
eth_addr->addr_bytes[1],
eth_addr->addr_bytes[2],
eth_addr->addr_bytes[3],
eth_addr->addr_bytes[4],
eth_addr->addr_bytes[5]);
}
/**
* Ethernet header: Contains the destination address, source address
* and frame type.
*/
struct ether_hdr {
struct ether_addr d_addr; /**< Destination address. */
struct ether_addr s_addr; /**< Source address. */
uint16_t ether_type; /**< Frame type. */
} __attribute__((__packed__));
/**
* Ethernet VLAN Header.
* Contains the 16-bit VLAN Tag Control Identifier and the Ethernet type
* of the encapsulated frame.
*/
struct vlan_hdr {
uint16_t vlan_tci; /**< Priority (3) + CFI (1) + Identifier Code (12) */
uint16_t eth_proto;/**< Ethernet type of encapsulated frame. */
} __attribute__((__packed__));
/**
* VXLAN protocol header.
* Contains the 8-bit flag, 24-bit VXLAN Network Identifier and
* Reserved fields (24 bits and 8 bits)
*/
struct vxlan_hdr {
uint32_t vx_flags; /**< flag (8) + Reserved (24). */
uint32_t vx_vni; /**< VNI (24) + Reserved (8). */
} __attribute__((__packed__));
/* Ethernet frame types */
#define ETHER_TYPE_IPv4 0x0800 /**< IPv4 Protocol. */
#define ETHER_TYPE_IPv6 0x86DD /**< IPv6 Protocol. */
#define ETHER_TYPE_ARP 0x0806 /**< Arp Protocol. */
#define ETHER_TYPE_RARP 0x8035 /**< Reverse Arp Protocol. */
#define ETHER_TYPE_VLAN 0x8100 /**< IEEE 802.1Q VLAN tagging. */
#define ETHER_TYPE_1588 0x88F7 /**< IEEE 802.1AS 1588 Precise Time Protocol. */
#define ETHER_TYPE_SLOW 0x8809 /**< Slow protocols (LACP and Marker). */
#define ETHER_VXLAN_HLEN (sizeof(struct udp_hdr) + sizeof(struct vxlan_hdr))
/**< VXLAN tunnel header length. */
#ifdef __cplusplus
}
#endif
#endif /* _RTE_ETHER_H_ */
|
