Imported Upstream version 16.11

Change-Id: I1944c65ddc88a9ad70f8c0eb6731552b84fbcb77
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>

1 files changed, 417 insertions, 0 deletions

diff --git a/lib/librte_net/rte_ether.h b/lib/librte_net/rte_ether.h
new file mode 100644
index 00000000..ff3d0654
--- /dev/null
+++ b/lib/librte_net/rte_ether.h
@@ -0,0 +1,417 @@
+/*-
+ *   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>
+#include <rte_mbuf.h>
+#include <rte_byteorder.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]; /**< Addr bytes in tx 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 unaligned_uint16_t *ea_words = (const unaligned_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 eth_addr
+ *   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_QINQ 0x88A8 /**< IEEE 802.1ad QinQ 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_TYPE_TEB  0x6558 /**< Transparent Ethernet Bridging. */
+
+#define ETHER_VXLAN_HLEN (sizeof(struct udp_hdr) + sizeof(struct vxlan_hdr))
+/**< VXLAN tunnel header length. */
+
+/**
+ * Extract VLAN tag information into mbuf
+ *
+ * Software version of VLAN stripping
+ *
+ * @param m
+ *   The packet mbuf.
+ * @return
+ *   - 0: Success
+ *   - 1: not a vlan packet
+ */
+static inline int rte_vlan_strip(struct rte_mbuf *m)
+{
+	struct ether_hdr *eh
+		 = rte_pktmbuf_mtod(m, struct ether_hdr *);
+
+	if (eh->ether_type != rte_cpu_to_be_16(ETHER_TYPE_VLAN))
+		return -1;
+
+	struct vlan_hdr *vh = (struct vlan_hdr *)(eh + 1);
+	m->ol_flags |= PKT_RX_VLAN_PKT;
+	m->vlan_tci = rte_be_to_cpu_16(vh->vlan_tci);
+
+	/* Copy ether header over rather than moving whole packet */
+	memmove(rte_pktmbuf_adj(m, sizeof(struct vlan_hdr)),
+		eh, 2 * ETHER_ADDR_LEN);
+
+	return 0;
+}
+
+/**
+ * Insert VLAN tag into mbuf.
+ *
+ * Software version of VLAN unstripping
+ *
+ * @param m
+ *   The packet mbuf.
+ * @return
+ *   - 0: On success
+ *   -EPERM: mbuf is is shared overwriting would be unsafe
+ *   -ENOSPC: not enough headroom in mbuf
+ */
+static inline int rte_vlan_insert(struct rte_mbuf **m)
+{
+	struct ether_hdr *oh, *nh;
+	struct vlan_hdr *vh;
+
+	/* Can't insert header if mbuf is shared */
+	if (rte_mbuf_refcnt_read(*m) > 1) {
+		struct rte_mbuf *copy;
+
+		copy = rte_pktmbuf_clone(*m, (*m)->pool);
+		if (unlikely(copy == NULL))
+			return -ENOMEM;
+		rte_pktmbuf_free(*m);
+		*m = copy;
+	}
+
+	oh = rte_pktmbuf_mtod(*m, struct ether_hdr *);
+	nh = (struct ether_hdr *)
+		rte_pktmbuf_prepend(*m, sizeof(struct vlan_hdr));
+	if (nh == NULL)
+		return -ENOSPC;
+
+	memmove(nh, oh, 2 * ETHER_ADDR_LEN);
+	nh->ether_type = rte_cpu_to_be_16(ETHER_TYPE_VLAN);
+
+	vh = (struct vlan_hdr *) (nh + 1);
+	vh->vlan_tci = rte_cpu_to_be_16((*m)->vlan_tci);
+
+	return 0;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_ETHER_H_ */