1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
11 * Ethernet Helpers in RTE
21 #include <rte_memcpy.h>
22 #include <rte_random.h>
24 #include <rte_byteorder.h>
26 #ifdef RTE_EXEC_ENV_WINDOWS /* Workaround conflict with rte_ether_hdr. */
27 #undef s_addr /* Defined in winsock2.h included in windows.h. */
30 #define RTE_ETHER_ADDR_LEN 6 /**< Length of Ethernet address. */
31 #define RTE_ETHER_TYPE_LEN 2 /**< Length of Ethernet type field. */
32 #define RTE_ETHER_CRC_LEN 4 /**< Length of Ethernet CRC. */
33 #define RTE_ETHER_HDR_LEN \
34 (RTE_ETHER_ADDR_LEN * 2 + \
35 RTE_ETHER_TYPE_LEN) /**< Length of Ethernet header. */
36 #define RTE_ETHER_MIN_LEN 64 /**< Minimum frame len, including CRC. */
37 #define RTE_ETHER_MAX_LEN 1518 /**< Maximum frame len, including CRC. */
38 #define RTE_ETHER_MTU \
39 (RTE_ETHER_MAX_LEN - RTE_ETHER_HDR_LEN - \
40 RTE_ETHER_CRC_LEN) /**< Ethernet MTU. */
42 #define RTE_ETHER_MAX_VLAN_FRAME_LEN \
43 (RTE_ETHER_MAX_LEN + 4)
44 /**< Maximum VLAN frame length, including CRC. */
46 #define RTE_ETHER_MAX_JUMBO_FRAME_LEN \
47 0x3F00 /**< Maximum Jumbo frame length, including CRC. */
49 #define RTE_ETHER_MAX_VLAN_ID 4095 /**< Maximum VLAN ID. */
51 #define RTE_ETHER_MIN_MTU 68 /**< Minimum MTU for IPv4 packets, see RFC 791. */
55 * A universally administered address is uniquely assigned to a device by its
56 * manufacturer. The first three octets (in transmission order) contain the
57 * Organizationally Unique Identifier (OUI). The following three (MAC-48 and
58 * EUI-48) octets are assigned by that organization with the only constraint
60 * A locally administered address is assigned to a device by a network
61 * administrator and does not contain OUIs.
62 * See http://standards.ieee.org/regauth/groupmac/tutorial.html
64 struct rte_ether_addr {
65 uint8_t addr_bytes[RTE_ETHER_ADDR_LEN]; /**< Addr bytes in tx order */
68 #define RTE_ETHER_LOCAL_ADMIN_ADDR 0x02 /**< Locally assigned Eth. address. */
69 #define RTE_ETHER_GROUP_ADDR 0x01 /**< Multicast or broadcast Eth. address. */
72 * Check if two Ethernet addresses are the same.
75 * A pointer to the first ether_addr structure containing
76 * the ethernet address.
78 * A pointer to the second ether_addr structure containing
79 * the ethernet address.
82 * True (1) if the given two ethernet address are the same;
83 * False (0) otherwise.
85 static inline int rte_is_same_ether_addr(const struct rte_ether_addr *ea1,
86 const struct rte_ether_addr *ea2)
88 const uint16_t *w1 = (const uint16_t *)ea1;
89 const uint16_t *w2 = (const uint16_t *)ea2;
91 return ((w1[0] ^ w2[0]) | (w1[1] ^ w2[1]) | (w1[2] ^ w2[2])) == 0;
95 * Check if an Ethernet address is filled with zeros.
98 * A pointer to a ether_addr structure containing the ethernet address
101 * True (1) if the given ethernet address is filled with zeros;
102 * false (0) otherwise.
104 static inline int rte_is_zero_ether_addr(const struct rte_ether_addr *ea)
106 const uint16_t *w = (const uint16_t *)ea;
108 return (w[0] | w[1] | w[2]) == 0;
112 * Check if an Ethernet address is a unicast address.
115 * A pointer to a ether_addr structure containing the ethernet address
118 * True (1) if the given ethernet address is a unicast address;
119 * false (0) otherwise.
121 static inline int rte_is_unicast_ether_addr(const struct rte_ether_addr *ea)
123 return (ea->addr_bytes[0] & RTE_ETHER_GROUP_ADDR) == 0;
127 * Check if an Ethernet address is a multicast address.
130 * A pointer to a ether_addr structure containing the ethernet address
133 * True (1) if the given ethernet address is a multicast address;
134 * false (0) otherwise.
136 static inline int rte_is_multicast_ether_addr(const struct rte_ether_addr *ea)
138 return ea->addr_bytes[0] & RTE_ETHER_GROUP_ADDR;
142 * Check if an Ethernet address is a broadcast address.
145 * A pointer to a ether_addr structure containing the ethernet address
148 * True (1) if the given ethernet address is a broadcast address;
149 * false (0) otherwise.
151 static inline int rte_is_broadcast_ether_addr(const struct rte_ether_addr *ea)
153 const uint16_t *ea_words = (const uint16_t *)ea;
155 return (ea_words[0] == 0xFFFF && ea_words[1] == 0xFFFF &&
156 ea_words[2] == 0xFFFF);
160 * Check if an Ethernet address is a universally assigned address.
163 * A pointer to a ether_addr structure containing the ethernet address
166 * True (1) if the given ethernet address is a universally assigned address;
167 * false (0) otherwise.
169 static inline int rte_is_universal_ether_addr(const struct rte_ether_addr *ea)
171 return (ea->addr_bytes[0] & RTE_ETHER_LOCAL_ADMIN_ADDR) == 0;
175 * Check if an Ethernet address is a locally assigned address.
178 * A pointer to a ether_addr structure containing the ethernet address
181 * True (1) if the given ethernet address is a locally assigned address;
182 * false (0) otherwise.
184 static inline int rte_is_local_admin_ether_addr(const struct rte_ether_addr *ea)
186 return (ea->addr_bytes[0] & RTE_ETHER_LOCAL_ADMIN_ADDR) != 0;
190 * Check if an Ethernet address is a valid address. Checks that the address is a
191 * unicast address and is not filled with zeros.
194 * A pointer to a ether_addr structure containing the ethernet address
197 * True (1) if the given ethernet address is valid;
198 * false (0) otherwise.
200 static inline int rte_is_valid_assigned_ether_addr(const struct rte_ether_addr *ea)
202 return rte_is_unicast_ether_addr(ea) && (!rte_is_zero_ether_addr(ea));
206 * Generate a random Ethernet address that is locally administered
209 * A pointer to Ethernet address.
212 rte_eth_random_addr(uint8_t *addr);
215 * Fast copy an Ethernet address.
218 * A pointer to a ether_addr structure holding the Ethernet address to copy.
220 * A pointer to a ether_addr structure where to copy the Ethernet address.
222 static inline void rte_ether_addr_copy(const struct rte_ether_addr *ea_from,
223 struct rte_ether_addr *ea_to)
225 #ifdef __INTEL_COMPILER
226 uint16_t *from_words = (uint16_t *)(ea_from->addr_bytes);
227 uint16_t *to_words = (uint16_t *)(ea_to->addr_bytes);
229 to_words[0] = from_words[0];
230 to_words[1] = from_words[1];
231 to_words[2] = from_words[2];
234 * Use the common way, because of a strange gcc warning.
240 #define RTE_ETHER_ADDR_FMT_SIZE 18
242 * Format 48bits Ethernet address in pattern xx:xx:xx:xx:xx:xx.
245 * A pointer to buffer contains the formatted MAC address.
247 * The format buffer size.
249 * A pointer to a ether_addr structure.
252 rte_ether_format_addr(char *buf, uint16_t size,
253 const struct rte_ether_addr *eth_addr);
255 * Convert string with Ethernet address to an ether_addr.
258 * A pointer to buffer contains the formatted MAC address.
259 * The supported formats are:
260 * XX:XX:XX:XX:XX:XX or XXXX:XXXX:XXXX
261 * where XX is a hex digit: 0-9, a-f, or A-F.
263 * A pointer to a ether_addr structure.
266 * -1 and sets rte_errno if invalid string
270 rte_ether_unformat_addr(const char *str, struct rte_ether_addr *eth_addr);
273 * Ethernet header: Contains the destination address, source address
276 struct rte_ether_hdr {
277 struct rte_ether_addr d_addr; /**< Destination address. */
278 struct rte_ether_addr s_addr; /**< Source address. */
279 uint16_t ether_type; /**< Frame type. */
283 * Ethernet VLAN Header.
284 * Contains the 16-bit VLAN Tag Control Identifier and the Ethernet type
285 * of the encapsulated frame.
287 struct rte_vlan_hdr {
288 uint16_t vlan_tci; /**< Priority (3) + CFI (1) + Identifier Code (12) */
289 uint16_t eth_proto;/**< Ethernet type of encapsulated frame. */
294 /* Ethernet frame types */
295 #define RTE_ETHER_TYPE_IPV4 0x0800 /**< IPv4 Protocol. */
296 #define RTE_ETHER_TYPE_IPV6 0x86DD /**< IPv6 Protocol. */
297 #define RTE_ETHER_TYPE_ARP 0x0806 /**< Arp Protocol. */
298 #define RTE_ETHER_TYPE_RARP 0x8035 /**< Reverse Arp Protocol. */
299 #define RTE_ETHER_TYPE_VLAN 0x8100 /**< IEEE 802.1Q VLAN tagging. */
300 #define RTE_ETHER_TYPE_QINQ 0x88A8 /**< IEEE 802.1ad QinQ tagging. */
301 #define RTE_ETHER_TYPE_QINQ1 0x9100 /**< Deprecated QinQ VLAN. */
302 #define RTE_ETHER_TYPE_QINQ2 0x9200 /**< Deprecated QinQ VLAN. */
303 #define RTE_ETHER_TYPE_QINQ3 0x9300 /**< Deprecated QinQ VLAN. */
304 #define RTE_ETHER_TYPE_PPPOE_DISCOVERY 0x8863 /**< PPPoE Discovery Stage. */
305 #define RTE_ETHER_TYPE_PPPOE_SESSION 0x8864 /**< PPPoE Session Stage. */
306 #define RTE_ETHER_TYPE_ETAG 0x893F /**< IEEE 802.1BR E-Tag. */
307 #define RTE_ETHER_TYPE_1588 0x88F7
308 /**< IEEE 802.1AS 1588 Precise Time Protocol. */
309 #define RTE_ETHER_TYPE_SLOW 0x8809 /**< Slow protocols (LACP and Marker). */
310 #define RTE_ETHER_TYPE_TEB 0x6558 /**< Transparent Ethernet Bridging. */
311 #define RTE_ETHER_TYPE_LLDP 0x88CC /**< LLDP Protocol. */
312 #define RTE_ETHER_TYPE_MPLS 0x8847 /**< MPLS ethertype. */
313 #define RTE_ETHER_TYPE_MPLSM 0x8848 /**< MPLS multicast ethertype. */
314 #define RTE_ETHER_TYPE_ECPRI 0xAEFE /**< eCPRI ethertype (.1Q supported). */
317 * Extract VLAN tag information into mbuf
319 * Software version of VLAN stripping
325 * - 1: not a vlan packet
327 static inline int rte_vlan_strip(struct rte_mbuf *m)
329 struct rte_ether_hdr *eh
330 = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
331 struct rte_vlan_hdr *vh;
333 if (eh->ether_type != rte_cpu_to_be_16(RTE_ETHER_TYPE_VLAN))
336 vh = (struct rte_vlan_hdr *)(eh + 1);
337 m->ol_flags |= PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED;
338 m->vlan_tci = rte_be_to_cpu_16(vh->vlan_tci);
340 /* Copy ether header over rather than moving whole packet */
341 memmove(rte_pktmbuf_adj(m, sizeof(struct rte_vlan_hdr)),
342 eh, 2 * RTE_ETHER_ADDR_LEN);
348 * Insert VLAN tag into mbuf.
350 * Software version of VLAN unstripping
356 * -EPERM: mbuf is is shared overwriting would be unsafe
357 * -ENOSPC: not enough headroom in mbuf
359 static inline int rte_vlan_insert(struct rte_mbuf **m)
361 struct rte_ether_hdr *oh, *nh;
362 struct rte_vlan_hdr *vh;
364 /* Can't insert header if mbuf is shared */
365 if (!RTE_MBUF_DIRECT(*m) || rte_mbuf_refcnt_read(*m) > 1)
368 oh = rte_pktmbuf_mtod(*m, struct rte_ether_hdr *);
369 nh = (struct rte_ether_hdr *)
370 rte_pktmbuf_prepend(*m, sizeof(struct rte_vlan_hdr));
374 memmove(nh, oh, 2 * RTE_ETHER_ADDR_LEN);
375 nh->ether_type = rte_cpu_to_be_16(RTE_ETHER_TYPE_VLAN);
377 vh = (struct rte_vlan_hdr *) (nh + 1);
378 vh->vlan_tci = rte_cpu_to_be_16((*m)->vlan_tci);
380 (*m)->ol_flags &= ~(PKT_RX_VLAN_STRIPPED | PKT_TX_VLAN);
382 if ((*m)->ol_flags & PKT_TX_TUNNEL_MASK)
383 (*m)->outer_l2_len += sizeof(struct rte_vlan_hdr);
385 (*m)->l2_len += sizeof(struct rte_vlan_hdr);
394 #endif /* _RTE_ETHER_H_ */