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41 * Ethernet Helpers in RTE
50 #define ETHER_ADDR_LEN 6 /**< Length of Ethernet address. */
51 #define ETHER_TYPE_LEN 2 /**< Length of Ethernet type field. */
52 #define ETHER_CRC_LEN 4 /**< Length of Ethernet CRC. */
53 #define ETHER_HDR_LEN \
54 (ETHER_ADDR_LEN * 2 + ETHER_TYPE_LEN) /**< Length of Ethernet header. */
55 #define ETHER_MIN_LEN 64 /**< Minimum frame len, including CRC. */
56 #define ETHER_MAX_LEN 1518 /**< Maximum frame len, including CRC. */
58 (ETHER_MAX_LEN - ETHER_HDR_LEN - ETHER_CRC_LEN) /**< Ethernet MTU. */
60 #define ETHER_MAX_VLAN_FRAME_LEN \
61 (ETHER_MAX_LEN + 4) /**< Maximum VLAN frame length, including CRC. */
63 #define ETHER_MAX_JUMBO_FRAME_LEN \
64 0x3F00 /**< Maximum Jumbo frame length, including CRC. */
68 * A universally administered address is uniquely assigned to a device by its
69 * manufacturer. The first three octets (in transmission order) contain the
70 * Organizationally Unique Identifier (OUI). The following three (MAC-48 and
71 * EUI-48) octets are assigned by that organization with the only constraint
73 * A locally administered address is assigned to a device by a network
74 * administrator and does not contain OUIs.
75 * See http://standards.ieee.org/regauth/groupmac/tutorial.html
78 uint8_t addr_bytes[ETHER_ADDR_LEN]; /**< Address bytes in transmission order */
79 } __attribute__((__packed__));
81 #define ETHER_LOCAL_ADMIN_ADDR 0x02 /**< Locally assigned Eth. address. */
82 #define ETHER_GROUP_ADDR 0x01 /**< Multicast or broadcast Eth. address. */
85 * Check if an Ethernet address is filled with zeros.
88 * A pointer to a ether_addr structure containing the ethernet address
91 * True (1) if the given ethernet address is filled with zeros;
92 * false (0) otherwise.
94 static inline int is_zero_ether_addr(const struct ether_addr *ea)
97 for (i = 0; i < ETHER_ADDR_LEN; i++)
98 if (ea->addr_bytes[i] != 0x00)
104 * Check if an Ethernet address is a unicast address.
107 * A pointer to a ether_addr structure containing the ethernet address
110 * True (1) if the given ethernet address is a unicast address;
111 * false (0) otherwise.
113 static inline int is_unicast_ether_addr(const struct ether_addr *ea)
115 return ((ea->addr_bytes[0] & ETHER_GROUP_ADDR) == 0);
119 * Check if an Ethernet address is a multicast address.
122 * A pointer to a ether_addr structure containing the ethernet address
125 * True (1) if the given ethernet address is a multicast address;
126 * false (0) otherwise.
128 static inline int is_multicast_ether_addr(const struct ether_addr *ea)
130 return (ea->addr_bytes[0] & ETHER_GROUP_ADDR);
134 * Check if an Ethernet address is a broadcast address.
137 * A pointer to a ether_addr structure containing the ethernet address
140 * True (1) if the given ethernet address is a broadcast address;
141 * false (0) otherwise.
143 static inline int is_broadcast_ether_addr(const struct ether_addr *ea)
145 const uint16_t *ea_words = (const uint16_t *)ea;
147 return (ea_words[0] == 0xFFFF && ea_words[1] == 0xFFFF &&
148 ea_words[2] == 0xFFFF);
152 * Check if an Ethernet address is a universally assigned address.
155 * A pointer to a ether_addr structure containing the ethernet address
158 * True (1) if the given ethernet address is a universally assigned address;
159 * false (0) otherwise.
161 static inline int is_universal_ether_addr(const struct ether_addr *ea)
163 return ((ea->addr_bytes[0] & ETHER_LOCAL_ADMIN_ADDR) == 0);
167 * Check if an Ethernet address is a locally assigned address.
170 * A pointer to a ether_addr structure containing the ethernet address
173 * True (1) if the given ethernet address is a locally assigned address;
174 * false (0) otherwise.
176 static inline int is_local_admin_ether_addr(const struct ether_addr *ea)
178 return ((ea->addr_bytes[0] & ETHER_LOCAL_ADMIN_ADDR) == 1);
182 * Check if an Ethernet address is a valid address. Checks that the address is a
183 * unicast address and is not filled with zeros.
186 * A pointer to a ether_addr structure containing the ethernet address
189 * True (1) if the given ethernet address is valid;
190 * false (0) otherwise.
192 static inline int is_valid_assigned_ether_addr(const struct ether_addr *ea)
194 return (is_unicast_ether_addr(ea) && (! is_zero_ether_addr(ea)));
198 * Fast copy an Ethernet address.
201 * A pointer to a ether_addr structure holding the Ethernet address to copy.
203 * A pointer to a ether_addr structure where to copy the Ethernet address.
205 static inline void ether_addr_copy(const struct ether_addr *ea_from,
206 struct ether_addr *ea_to)
208 #ifdef __INTEL_COMPILER
209 uint16_t *from_words = (uint16_t *)(ea_from->addr_bytes);
210 uint16_t *to_words = (uint16_t *)(ea_to->addr_bytes);
212 to_words[0] = from_words[0];
213 to_words[1] = from_words[1];
214 to_words[2] = from_words[2];
217 * Use the common way, because of a strange gcc warning.
224 * Ethernet header: Contains the destination address, source address
228 struct ether_addr d_addr; /**< Destination address. */
229 struct ether_addr s_addr; /**< Source address. */
230 uint16_t ether_type; /**< Frame type. */
231 } __attribute__((__packed__));
234 * Ethernet VLAN Header.
235 * Contains the 16-bit VLAN Tag Control Identifier and the Ethernet type
236 * of the encapsulated frame.
239 uint16_t vlan_tci; /**< Priority (3) + CFI (1) + Identifier Code (12) */
240 uint16_t eth_proto;/**< Ethernet type of encapsulated frame. */
241 } __attribute__((__packed__));
243 /* Ethernet frame types */
244 #define ETHER_TYPE_IPv4 0x0800 /**< IPv4 Protocol. */
245 #define ETHER_TYPE_IPv6 0x86DD /**< IPv6 Protocol. */
246 #define ETHER_TYPE_ARP 0x0806 /**< Arp Protocol. */
247 #define ETHER_TYPE_RARP 0x8035 /**< Reverse Arp Protocol. */
248 #define ETHER_TYPE_VLAN 0x8100 /**< IEEE 802.1Q VLAN tagging. */
249 #define ETHER_TYPE_1588 0x88F7 /**< IEEE 802.1AS 1588 Precise Time Protocol. */
255 #endif /* _RTE_ETHER_H_ */