Imported Upstream version 16.04

Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>

1 files changed, 1093 insertions, 0 deletions

diff --git a/drivers/net/pcap/rte_eth_pcap.c b/drivers/net/pcap/rte_eth_pcap.c
new file mode 100644
index 00000000..c98e2341
--- /dev/null
+++ b/drivers/net/pcap/rte_eth_pcap.c
@@ -0,0 +1,1093 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+ *   Copyright(c) 2014 6WIND S.A.
+ *   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.
+ */
+
+#include <time.h>
+#include <rte_mbuf.h>
+#include <rte_ethdev.h>
+#include <rte_malloc.h>
+#include <rte_memcpy.h>
+#include <rte_string_fns.h>
+#include <rte_cycles.h>
+#include <rte_kvargs.h>
+#include <rte_dev.h>
+
+#include <net/if.h>
+
+#include <pcap.h>
+
+#define RTE_ETH_PCAP_SNAPSHOT_LEN 65535
+#define RTE_ETH_PCAP_SNAPLEN ETHER_MAX_JUMBO_FRAME_LEN
+#define RTE_ETH_PCAP_PROMISC 1
+#define RTE_ETH_PCAP_TIMEOUT -1
+#define ETH_PCAP_RX_PCAP_ARG  "rx_pcap"
+#define ETH_PCAP_TX_PCAP_ARG  "tx_pcap"
+#define ETH_PCAP_RX_IFACE_ARG "rx_iface"
+#define ETH_PCAP_TX_IFACE_ARG "tx_iface"
+#define ETH_PCAP_IFACE_ARG    "iface"
+
+#define ETH_PCAP_ARG_MAXLEN	64
+
+static char errbuf[PCAP_ERRBUF_SIZE];
+static unsigned char tx_pcap_data[RTE_ETH_PCAP_SNAPLEN];
+static struct timeval start_time;
+static uint64_t start_cycles;
+static uint64_t hz;
+
+struct pcap_rx_queue {
+	pcap_t *pcap;
+	uint8_t in_port;
+	struct rte_mempool *mb_pool;
+	volatile unsigned long rx_pkts;
+	volatile unsigned long rx_bytes;
+	volatile unsigned long err_pkts;
+	char name[PATH_MAX];
+	char type[ETH_PCAP_ARG_MAXLEN];
+};
+
+struct pcap_tx_queue {
+	pcap_dumper_t *dumper;
+	pcap_t *pcap;
+	volatile unsigned long tx_pkts;
+	volatile unsigned long tx_bytes;
+	volatile unsigned long err_pkts;
+	char name[PATH_MAX];
+	char type[ETH_PCAP_ARG_MAXLEN];
+};
+
+struct rx_pcaps {
+	unsigned num_of_rx;
+	pcap_t *pcaps[RTE_PMD_RING_MAX_RX_RINGS];
+	const char *names[RTE_PMD_RING_MAX_RX_RINGS];
+	const char *types[RTE_PMD_RING_MAX_RX_RINGS];
+};
+
+struct tx_pcaps {
+	unsigned num_of_tx;
+	pcap_dumper_t *dumpers[RTE_PMD_RING_MAX_TX_RINGS];
+	pcap_t *pcaps[RTE_PMD_RING_MAX_RX_RINGS];
+	const char *names[RTE_PMD_RING_MAX_RX_RINGS];
+	const char *types[RTE_PMD_RING_MAX_RX_RINGS];
+};
+
+struct pmd_internals {
+	struct pcap_rx_queue rx_queue[RTE_PMD_RING_MAX_RX_RINGS];
+	struct pcap_tx_queue tx_queue[RTE_PMD_RING_MAX_TX_RINGS];
+	int if_index;
+	int single_iface;
+};
+
+const char *valid_arguments[] = {
+	ETH_PCAP_RX_PCAP_ARG,
+	ETH_PCAP_TX_PCAP_ARG,
+	ETH_PCAP_RX_IFACE_ARG,
+	ETH_PCAP_TX_IFACE_ARG,
+	ETH_PCAP_IFACE_ARG,
+	NULL
+};
+
+static int open_single_tx_pcap(const char *pcap_filename, pcap_dumper_t **dumper);
+static int open_single_rx_pcap(const char *pcap_filename, pcap_t **pcap);
+static int open_single_iface(const char *iface, pcap_t **pcap);
+
+static struct ether_addr eth_addr = { .addr_bytes = { 0, 0, 0, 0x1, 0x2, 0x3 } };
+static const char *drivername = "Pcap PMD";
+static struct rte_eth_link pmd_link = {
+		.link_speed = ETH_SPEED_NUM_10G,
+		.link_duplex = ETH_LINK_FULL_DUPLEX,
+		.link_status = ETH_LINK_DOWN,
+		.link_autoneg = ETH_LINK_SPEED_FIXED,
+};
+
+static int
+eth_pcap_rx_jumbo(struct rte_mempool *mb_pool,
+		  struct rte_mbuf *mbuf,
+		  const u_char *data,
+		  uint16_t data_len)
+{
+	struct rte_mbuf *m = mbuf;
+
+	/* Copy the first segment. */
+	uint16_t len = rte_pktmbuf_tailroom(mbuf);
+
+	rte_memcpy(rte_pktmbuf_append(mbuf, len), data, len);
+	data_len -= len;
+	data += len;
+
+	while (data_len > 0) {
+		/* Allocate next mbuf and point to that. */
+		m->next = rte_pktmbuf_alloc(mb_pool);
+
+		if (unlikely(!m->next))
+			return -1;
+
+		m = m->next;
+
+		/* Headroom is not needed in chained mbufs. */
+		rte_pktmbuf_prepend(m, rte_pktmbuf_headroom(m));
+		m->pkt_len = 0;
+		m->data_len = 0;
+
+		/* Copy next segment. */
+		len = RTE_MIN(rte_pktmbuf_tailroom(m), data_len);
+		rte_memcpy(rte_pktmbuf_append(m, len), data, len);
+
+		mbuf->nb_segs++;
+		data_len -= len;
+		data += len;
+	}
+
+	return mbuf->nb_segs;
+}
+
+/* Copy data from mbuf chain to a buffer suitable for writing to a PCAP file. */
+static void
+eth_pcap_gather_data(unsigned char *data, struct rte_mbuf *mbuf)
+{
+	uint16_t data_len = 0;
+
+	while (mbuf) {
+		rte_memcpy(data + data_len, rte_pktmbuf_mtod(mbuf, void *),
+			   mbuf->data_len);
+
+		data_len += mbuf->data_len;
+		mbuf = mbuf->next;
+	}
+}
+
+static uint16_t
+eth_pcap_rx(void *queue,
+		struct rte_mbuf **bufs,
+		uint16_t nb_pkts)
+{
+	unsigned i;
+	struct pcap_pkthdr header;
+	const u_char *packet;
+	struct rte_mbuf *mbuf;
+	struct pcap_rx_queue *pcap_q = queue;
+	uint16_t num_rx = 0;
+	uint16_t buf_size;
+	uint32_t rx_bytes = 0;
+
+	if (unlikely(pcap_q->pcap == NULL || nb_pkts == 0))
+		return 0;
+
+	/* Reads the given number of packets from the pcap file one by one
+	 * and copies the packet data into a newly allocated mbuf to return.
+	 */
+	for (i = 0; i < nb_pkts; i++) {
+		/* Get the next PCAP packet */
+		packet = pcap_next(pcap_q->pcap, &header);
+		if (unlikely(packet == NULL))
+			break;
+		else
+			mbuf = rte_pktmbuf_alloc(pcap_q->mb_pool);
+		if (unlikely(mbuf == NULL))
+			break;
+
+		/* Now get the space available for data in the mbuf */
+		buf_size = (uint16_t)(rte_pktmbuf_data_room_size(pcap_q->mb_pool) -
+				RTE_PKTMBUF_HEADROOM);
+
+		if (header.caplen <= buf_size) {
+			/* pcap packet will fit in the mbuf, go ahead and copy */
+			rte_memcpy(rte_pktmbuf_mtod(mbuf, void *), packet,
+					header.caplen);
+			mbuf->data_len = (uint16_t)header.caplen;
+		} else {
+			/* Try read jumbo frame into multi mbufs. */
+			if (unlikely(eth_pcap_rx_jumbo(pcap_q->mb_pool,
+						       mbuf,
+						       packet,
+						       header.caplen) == -1))
+				break;
+		}
+
+		mbuf->pkt_len = (uint16_t)header.caplen;
+		mbuf->port = pcap_q->in_port;
+		bufs[num_rx] = mbuf;
+		num_rx++;
+		rx_bytes += header.caplen;
+	}
+	pcap_q->rx_pkts += num_rx;
+	pcap_q->rx_bytes += rx_bytes;
+	return num_rx;
+}
+
+static inline void
+calculate_timestamp(struct timeval *ts) {
+	uint64_t cycles;
+	struct timeval cur_time;
+
+	cycles = rte_get_timer_cycles() - start_cycles;
+	cur_time.tv_sec = cycles / hz;
+	cur_time.tv_usec = (cycles % hz) * 10e6 / hz;
+	timeradd(&start_time, &cur_time, ts);
+}
+
+/*
+ * Callback to handle writing packets to a pcap file.
+ */
+static uint16_t
+eth_pcap_tx_dumper(void *queue,
+		struct rte_mbuf **bufs,
+		uint16_t nb_pkts)
+{
+	unsigned i;
+	struct rte_mbuf *mbuf;
+	struct pcap_tx_queue *dumper_q = queue;
+	uint16_t num_tx = 0;
+	uint32_t tx_bytes = 0;
+	struct pcap_pkthdr header;
+
+	if (dumper_q->dumper == NULL || nb_pkts == 0)
+		return 0;
+
+	/* writes the nb_pkts packets to the previously opened pcap file dumper */
+	for (i = 0; i < nb_pkts; i++) {
+		mbuf = bufs[i];
+		calculate_timestamp(&header.ts);
+		header.len = mbuf->pkt_len;
+		header.caplen = header.len;
+
+		if (likely(mbuf->nb_segs == 1)) {
+			pcap_dump((u_char *)dumper_q->dumper, &header,
+				  rte_pktmbuf_mtod(mbuf, void*));
+		} else {
+			if (mbuf->pkt_len <= ETHER_MAX_JUMBO_FRAME_LEN) {
+				eth_pcap_gather_data(tx_pcap_data, mbuf);
+				pcap_dump((u_char *)dumper_q->dumper, &header,
+					  tx_pcap_data);
+			} else {
+				RTE_LOG(ERR, PMD,
+					"Dropping PCAP packet. "
+					"Size (%d) > max jumbo size (%d).\n",
+					mbuf->pkt_len,
+					ETHER_MAX_JUMBO_FRAME_LEN);
+
+				rte_pktmbuf_free(mbuf);
+				break;
+			}
+		}
+
+		rte_pktmbuf_free(mbuf);
+		num_tx++;
+		tx_bytes += mbuf->pkt_len;
+	}
+
+	/*
+	 * Since there's no place to hook a callback when the forwarding
+	 * process stops and to make sure the pcap file is actually written,
+	 * we flush the pcap dumper within each burst.
+	 */
+	pcap_dump_flush(dumper_q->dumper);
+	dumper_q->tx_pkts += num_tx;
+	dumper_q->tx_bytes += tx_bytes;
+	dumper_q->err_pkts += nb_pkts - num_tx;
+	return num_tx;
+}
+
+/*
+ * Callback to handle sending packets through a real NIC.
+ */
+static uint16_t
+eth_pcap_tx(void *queue,
+		struct rte_mbuf **bufs,
+		uint16_t nb_pkts)
+{
+	unsigned i;
+	int ret;
+	struct rte_mbuf *mbuf;
+	struct pcap_tx_queue *tx_queue = queue;
+	uint16_t num_tx = 0;
+	uint32_t tx_bytes = 0;
+
+	if (unlikely(nb_pkts == 0 || tx_queue->pcap == NULL))
+		return 0;
+
+	for (i = 0; i < nb_pkts; i++) {
+		mbuf = bufs[i];
+
+		if (likely(mbuf->nb_segs == 1)) {
+			ret = pcap_sendpacket(tx_queue->pcap,
+					      rte_pktmbuf_mtod(mbuf, u_char *),
+					      mbuf->pkt_len);
+		} else {
+			if (mbuf->pkt_len <= ETHER_MAX_JUMBO_FRAME_LEN) {
+				eth_pcap_gather_data(tx_pcap_data, mbuf);
+				ret = pcap_sendpacket(tx_queue->pcap,
+						      tx_pcap_data,
+						      mbuf->pkt_len);
+			} else {
+				RTE_LOG(ERR, PMD,
+					"Dropping PCAP packet. "
+					"Size (%d) > max jumbo size (%d).\n",
+					mbuf->pkt_len,
+					ETHER_MAX_JUMBO_FRAME_LEN);
+
+				rte_pktmbuf_free(mbuf);
+				break;
+			}
+		}
+
+		if (unlikely(ret != 0))
+			break;
+		num_tx++;
+		tx_bytes += mbuf->pkt_len;
+		rte_pktmbuf_free(mbuf);
+	}
+
+	tx_queue->tx_pkts += num_tx;
+	tx_queue->tx_bytes += tx_bytes;
+	tx_queue->err_pkts += nb_pkts - num_tx;
+	return num_tx;
+}
+
+static int
+eth_dev_start(struct rte_eth_dev *dev)
+{
+	unsigned i;
+	struct pmd_internals *internals = dev->data->dev_private;
+	struct pcap_tx_queue *tx;
+	struct pcap_rx_queue *rx;
+
+	/* Special iface case. Single pcap is open and shared between tx/rx. */
+	if (internals->single_iface) {
+		tx = &internals->tx_queue[0];
+		rx = &internals->rx_queue[0];
+
+		if (!tx->pcap && strcmp(tx->type, ETH_PCAP_IFACE_ARG) == 0) {
+			if (open_single_iface(tx->name, &tx->pcap) < 0)
+				return -1;
+			rx->pcap = tx->pcap;
+		}
+		goto status_up;
+	}
+
+	/* If not open already, open tx pcaps/dumpers */
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		tx = &internals->tx_queue[i];
+
+		if (!tx->dumper && strcmp(tx->type, ETH_PCAP_TX_PCAP_ARG) == 0) {
+			if (open_single_tx_pcap(tx->name, &tx->dumper) < 0)
+				return -1;
+		}
+
+		else if (!tx->pcap && strcmp(tx->type, ETH_PCAP_TX_IFACE_ARG) == 0) {
+			if (open_single_iface(tx->name, &tx->pcap) < 0)
+				return -1;
+		}
+	}
+
+	/* If not open already, open rx pcaps */
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		rx = &internals->rx_queue[i];
+
+		if (rx->pcap != NULL)
+			continue;
+
+		if (strcmp(rx->type, ETH_PCAP_RX_PCAP_ARG) == 0) {
+			if (open_single_rx_pcap(rx->name, &rx->pcap) < 0)
+				return -1;
+		}
+
+		else if (strcmp(rx->type, ETH_PCAP_RX_IFACE_ARG) == 0) {
+			if (open_single_iface(rx->name, &rx->pcap) < 0)
+				return -1;
+		}
+	}
+
+status_up:
+
+	dev->data->dev_link.link_status = ETH_LINK_UP;
+	return 0;
+}
+
+/*
+ * This function gets called when the current port gets stopped.
+ * Is the only place for us to close all the tx streams dumpers.
+ * If not called the dumpers will be flushed within each tx burst.
+ */
+static void
+eth_dev_stop(struct rte_eth_dev *dev)
+{
+	unsigned i;
+	struct pmd_internals *internals = dev->data->dev_private;
+	struct pcap_tx_queue *tx;
+	struct pcap_rx_queue *rx;
+
+	/* Special iface case. Single pcap is open and shared between tx/rx. */
+	if (internals->single_iface) {
+		tx = &internals->tx_queue[0];
+		rx = &internals->rx_queue[0];
+		pcap_close(tx->pcap);
+		tx->pcap = NULL;
+		rx->pcap = NULL;
+		goto status_down;
+	}
+
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		tx = &internals->tx_queue[i];
+
+		if (tx->dumper != NULL) {
+			pcap_dump_close(tx->dumper);
+			tx->dumper = NULL;
+		}
+
+		if (tx->pcap != NULL) {
+			pcap_close(tx->pcap);
+			tx->pcap = NULL;
+		}
+	}
+
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		rx = &internals->rx_queue[i];
+
+		if (rx->pcap != NULL) {
+			pcap_close(rx->pcap);
+			rx->pcap = NULL;
+		}
+	}
+
+status_down:
+	dev->data->dev_link.link_status = ETH_LINK_DOWN;
+}
+
+static int
+eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
+{
+	return 0;
+}
+
+static void
+eth_dev_info(struct rte_eth_dev *dev,
+		struct rte_eth_dev_info *dev_info)
+{
+	struct pmd_internals *internals = dev->data->dev_private;
+	dev_info->driver_name = drivername;
+	dev_info->if_index = internals->if_index;
+	dev_info->max_mac_addrs = 1;
+	dev_info->max_rx_pktlen = (uint32_t) -1;
+	dev_info->max_rx_queues = dev->data->nb_rx_queues;
+	dev_info->max_tx_queues = dev->data->nb_tx_queues;
+	dev_info->min_rx_bufsize = 0;
+	dev_info->pci_dev = NULL;
+}
+
+static void
+eth_stats_get(struct rte_eth_dev *dev,
+		struct rte_eth_stats *igb_stats)
+{
+	unsigned i;
+	unsigned long rx_packets_total = 0, rx_bytes_total = 0;
+	unsigned long tx_packets_total = 0, tx_bytes_total = 0;
+	unsigned long tx_packets_err_total = 0;
+	const struct pmd_internals *internal = dev->data->dev_private;
+
+	for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
+			i < dev->data->nb_rx_queues; i++) {
+		igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts;
+		igb_stats->q_ibytes[i] = internal->rx_queue[i].rx_bytes;
+		rx_packets_total += igb_stats->q_ipackets[i];
+		rx_bytes_total += igb_stats->q_ibytes[i];
+	}
+
+	for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
+			i < dev->data->nb_tx_queues; i++) {
+		igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts;
+		igb_stats->q_obytes[i] = internal->tx_queue[i].tx_bytes;
+		igb_stats->q_errors[i] = internal->tx_queue[i].err_pkts;
+		tx_packets_total += igb_stats->q_opackets[i];
+		tx_bytes_total += igb_stats->q_obytes[i];
+		tx_packets_err_total += igb_stats->q_errors[i];
+	}
+
+	igb_stats->ipackets = rx_packets_total;
+	igb_stats->ibytes = rx_bytes_total;
+	igb_stats->opackets = tx_packets_total;
+	igb_stats->obytes = tx_bytes_total;
+	igb_stats->oerrors = tx_packets_err_total;
+}
+
+static void
+eth_stats_reset(struct rte_eth_dev *dev)
+{
+	unsigned i;
+	struct pmd_internals *internal = dev->data->dev_private;
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		internal->rx_queue[i].rx_pkts = 0;
+		internal->rx_queue[i].rx_bytes = 0;
+	}
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		internal->tx_queue[i].tx_pkts = 0;
+		internal->tx_queue[i].tx_bytes = 0;
+		internal->tx_queue[i].err_pkts = 0;
+	}
+}
+
+static void
+eth_dev_close(struct rte_eth_dev *dev __rte_unused)
+{
+}
+
+static void
+eth_queue_release(void *q __rte_unused)
+{
+}
+
+static int
+eth_link_update(struct rte_eth_dev *dev __rte_unused,
+		int wait_to_complete __rte_unused)
+{
+	return 0;
+}
+
+static int
+eth_rx_queue_setup(struct rte_eth_dev *dev,
+		uint16_t rx_queue_id,
+		uint16_t nb_rx_desc __rte_unused,
+		unsigned int socket_id __rte_unused,
+		const struct rte_eth_rxconf *rx_conf __rte_unused,
+		struct rte_mempool *mb_pool)
+{
+	struct pmd_internals *internals = dev->data->dev_private;
+	struct pcap_rx_queue *pcap_q = &internals->rx_queue[rx_queue_id];
+	pcap_q->mb_pool = mb_pool;
+	dev->data->rx_queues[rx_queue_id] = pcap_q;
+	pcap_q->in_port = dev->data->port_id;
+	return 0;
+}
+
+static int
+eth_tx_queue_setup(struct rte_eth_dev *dev,
+		uint16_t tx_queue_id,
+		uint16_t nb_tx_desc __rte_unused,
+		unsigned int socket_id __rte_unused,
+		const struct rte_eth_txconf *tx_conf __rte_unused)
+{
+
+	struct pmd_internals *internals = dev->data->dev_private;
+	dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id];
+	return 0;
+}
+
+static const struct eth_dev_ops ops = {
+	.dev_start = eth_dev_start,
+	.dev_stop =	eth_dev_stop,
+	.dev_close = eth_dev_close,
+	.dev_configure = eth_dev_configure,
+	.dev_infos_get = eth_dev_info,
+	.rx_queue_setup = eth_rx_queue_setup,
+	.tx_queue_setup = eth_tx_queue_setup,
+	.rx_queue_release = eth_queue_release,
+	.tx_queue_release = eth_queue_release,
+	.link_update = eth_link_update,
+	.stats_get = eth_stats_get,
+	.stats_reset = eth_stats_reset,
+};
+
+/*
+ * Function handler that opens the pcap file for reading a stores a
+ * reference of it for use it later on.
+ */
+static int
+open_rx_pcap(const char *key, const char *value, void *extra_args)
+{
+	unsigned i;
+	const char *pcap_filename = value;
+	struct rx_pcaps *pcaps = extra_args;
+	pcap_t *pcap = NULL;
+
+	for (i = 0; i < pcaps->num_of_rx; i++) {
+		if (open_single_rx_pcap(pcap_filename, &pcap) < 0)
+			return -1;
+
+		pcaps->pcaps[i] = pcap;
+		pcaps->names[i] = pcap_filename;
+		pcaps->types[i] = key;
+	}
+
+	return 0;
+}
+
+static int
+open_single_rx_pcap(const char *pcap_filename, pcap_t **pcap)
+{
+	if ((*pcap = pcap_open_offline(pcap_filename, errbuf)) == NULL) {
+		RTE_LOG(ERR, PMD, "Couldn't open %s: %s\n", pcap_filename, errbuf);
+		return -1;
+	}
+	return 0;
+}
+
+/*
+ * Opens a pcap file for writing and stores a reference to it
+ * for use it later on.
+ */
+static int
+open_tx_pcap(const char *key, const char *value, void *extra_args)
+{
+	unsigned i;
+	const char *pcap_filename = value;
+	struct tx_pcaps *dumpers = extra_args;
+	pcap_dumper_t *dumper;
+
+	for (i = 0; i < dumpers->num_of_tx; i++) {
+		if (open_single_tx_pcap(pcap_filename, &dumper) < 0)
+			return -1;
+
+		dumpers->dumpers[i] = dumper;
+		dumpers->names[i] = pcap_filename;
+		dumpers->types[i] = key;
+	}
+
+	return 0;
+}
+
+static int
+open_single_tx_pcap(const char *pcap_filename, pcap_dumper_t **dumper)
+{
+	pcap_t *tx_pcap;
+	/*
+	 * We need to create a dummy empty pcap_t to use it
+	 * with pcap_dump_open(). We create big enough an Ethernet
+	 * pcap holder.
+	 */
+
+	if ((tx_pcap = pcap_open_dead(DLT_EN10MB, RTE_ETH_PCAP_SNAPSHOT_LEN))
+			== NULL) {
+		RTE_LOG(ERR, PMD, "Couldn't create dead pcap\n");
+		return -1;
+	}
+
+	/* The dumper is created using the previous pcap_t reference */
+	if ((*dumper = pcap_dump_open(tx_pcap, pcap_filename)) == NULL) {
+		RTE_LOG(ERR, PMD, "Couldn't open %s for writing.\n", pcap_filename);
+		return -1;
+	}
+
+	return 0;
+}
+
+/*
+ * pcap_open_live wrapper function
+ */
+static inline int
+open_iface_live(const char *iface, pcap_t **pcap) {
+	*pcap = pcap_open_live(iface, RTE_ETH_PCAP_SNAPLEN,
+			RTE_ETH_PCAP_PROMISC, RTE_ETH_PCAP_TIMEOUT, errbuf);
+
+	if (*pcap == NULL) {
+		RTE_LOG(ERR, PMD, "Couldn't open %s: %s\n", iface, errbuf);
+		return -1;
+	}
+	return 0;
+}
+
+/*
+ * Opens an interface for reading and writing
+ */
+static inline int
+open_rx_tx_iface(const char *key, const char *value, void *extra_args)
+{
+	const char *iface = value;
+	struct rx_pcaps *pcaps = extra_args;
+	pcap_t *pcap = NULL;
+
+	if (open_single_iface(iface, &pcap) < 0)
+		return -1;
+
+	pcaps->pcaps[0] = pcap;
+	pcaps->names[0] = iface;
+	pcaps->types[0] = key;
+
+	return 0;
+}
+
+/*
+ * Opens a NIC for reading packets from it
+ */
+static inline int
+open_rx_iface(const char *key, const char *value, void *extra_args)
+{
+	unsigned i;
+	const char *iface = value;
+	struct rx_pcaps *pcaps = extra_args;
+	pcap_t *pcap = NULL;
+
+	for (i = 0; i < pcaps->num_of_rx; i++) {
+		if (open_single_iface(iface, &pcap) < 0)
+			return -1;
+		pcaps->pcaps[i] = pcap;
+		pcaps->names[i] = iface;
+		pcaps->types[i] = key;
+	}
+
+	return 0;
+}
+
+/*
+ * Opens a NIC for writing packets to it
+ */
+static int
+open_tx_iface(const char *key, const char *value, void *extra_args)
+{
+	unsigned i;
+	const char *iface = value;
+	struct tx_pcaps *pcaps = extra_args;
+	pcap_t *pcap;
+
+	for (i = 0; i < pcaps->num_of_tx; i++) {
+		if (open_single_iface(iface, &pcap) < 0)
+			return -1;
+		pcaps->pcaps[i] = pcap;
+		pcaps->names[i] = iface;
+		pcaps->types[i] = key;
+	}
+
+	return 0;
+}
+
+static int
+open_single_iface(const char *iface, pcap_t **pcap)
+{
+	if (open_iface_live(iface, pcap) < 0) {
+		RTE_LOG(ERR, PMD, "Couldn't open interface %s\n", iface);
+		return -1;
+	}
+
+	return 0;
+}
+
+static int
+rte_pmd_init_internals(const char *name, const unsigned nb_rx_queues,
+		const unsigned nb_tx_queues,
+		const unsigned numa_node,
+		struct pmd_internals **internals,
+		struct rte_eth_dev **eth_dev,
+		struct rte_kvargs *kvlist)
+{
+	struct rte_eth_dev_data *data = NULL;
+	unsigned k_idx;
+	struct rte_kvargs_pair *pair = NULL;
+
+	for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
+		pair = &kvlist->pairs[k_idx];
+		if (strstr(pair->key, ETH_PCAP_IFACE_ARG) != NULL)
+			break;
+	}
+
+	RTE_LOG(INFO, PMD,
+			"Creating pcap-backed ethdev on numa socket %u\n", numa_node);
+
+	/* now do all data allocation - for eth_dev structure
+	 * and internal (private) data
+	 */
+	data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
+	if (data == NULL)
+		goto error;
+
+	*internals = rte_zmalloc_socket(name, sizeof(**internals), 0, numa_node);
+	if (*internals == NULL)
+		goto error;
+
+	/* reserve an ethdev entry */
+	*eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_VIRTUAL);
+	if (*eth_dev == NULL)
+		goto error;
+
+	/* check length of device name */
+	if ((strlen((*eth_dev)->data->name) + 1) > sizeof(data->name))
+		goto error;
+
+	/* now put it all together
+	 * - store queue data in internals,
+	 * - store numa_node info in eth_dev
+	 * - point eth_dev_data to internals
+	 * - and point eth_dev structure to new eth_dev_data structure
+	 */
+	/* NOTE: we'll replace the data element, of originally allocated eth_dev
+	 * so the rings are local per-process */
+
+	if (pair == NULL)
+		(*internals)->if_index = 0;
+	else
+		(*internals)->if_index = if_nametoindex(pair->value);
+
+	data->dev_private = *internals;
+	data->port_id = (*eth_dev)->data->port_id;
+	snprintf(data->name, sizeof(data->name), "%s", (*eth_dev)->data->name);
+	data->nb_rx_queues = (uint16_t)nb_rx_queues;
+	data->nb_tx_queues = (uint16_t)nb_tx_queues;
+	data->dev_link = pmd_link;
+	data->mac_addrs = &eth_addr;
+	strncpy(data->name,
+		(*eth_dev)->data->name, strlen((*eth_dev)->data->name));
+
+	(*eth_dev)->data = data;
+	(*eth_dev)->dev_ops = &ops;
+	(*eth_dev)->driver = NULL;
+	data->dev_flags = RTE_ETH_DEV_DETACHABLE;
+	data->kdrv = RTE_KDRV_NONE;
+	data->drv_name = drivername;
+	data->numa_node = numa_node;
+
+	return 0;
+
+error:
+	rte_free(data);
+	rte_free(*internals);
+
+	return -1;
+}
+
+static int
+rte_eth_from_pcaps_common(const char *name, struct rx_pcaps *rx_queues,
+		const unsigned nb_rx_queues, struct tx_pcaps *tx_queues,
+		const unsigned nb_tx_queues, const unsigned numa_node,
+		struct rte_kvargs *kvlist, struct pmd_internals **internals,
+		struct rte_eth_dev **eth_dev)
+{
+	unsigned i;
+
+	/* do some parameter checking */
+	if (rx_queues == NULL && nb_rx_queues > 0)
+		return -1;
+	if (tx_queues == NULL && nb_tx_queues > 0)
+		return -1;
+
+	if (rte_pmd_init_internals(name, nb_rx_queues, nb_tx_queues, numa_node,
+			internals, eth_dev, kvlist) < 0)
+		return -1;
+
+	for (i = 0; i < nb_rx_queues; i++) {
+		(*internals)->rx_queue[i].pcap = rx_queues->pcaps[i];
+		snprintf((*internals)->rx_queue[i].name,
+			sizeof((*internals)->rx_queue[i].name), "%s",
+			rx_queues->names[i]);
+		snprintf((*internals)->rx_queue[i].type,
+			sizeof((*internals)->rx_queue[i].type), "%s",
+			rx_queues->types[i]);
+	}
+	for (i = 0; i < nb_tx_queues; i++) {
+		(*internals)->tx_queue[i].dumper = tx_queues->dumpers[i];
+		snprintf((*internals)->tx_queue[i].name,
+			sizeof((*internals)->tx_queue[i].name), "%s",
+			tx_queues->names[i]);
+		snprintf((*internals)->tx_queue[i].type,
+			sizeof((*internals)->tx_queue[i].type), "%s",
+			tx_queues->types[i]);
+	}
+
+	return 0;
+}
+
+static int
+rte_eth_from_pcaps_n_dumpers(const char *name,
+		struct rx_pcaps *rx_queues,
+		const unsigned nb_rx_queues,
+		struct tx_pcaps *tx_queues,
+		const unsigned nb_tx_queues,
+		const unsigned numa_node,
+		struct rte_kvargs *kvlist)
+{
+	struct pmd_internals *internals = NULL;
+	struct rte_eth_dev *eth_dev = NULL;
+	int ret;
+
+	ret = rte_eth_from_pcaps_common(name, rx_queues, nb_rx_queues,
+			tx_queues, nb_tx_queues, numa_node, kvlist,
+			&internals, &eth_dev);
+
+	if (ret < 0)
+		return ret;
+
+	/* using multiple pcaps/interfaces */
+	internals->single_iface = 0;
+
+	eth_dev->rx_pkt_burst = eth_pcap_rx;
+	eth_dev->tx_pkt_burst = eth_pcap_tx_dumper;
+
+	return 0;
+}
+
+static int
+rte_eth_from_pcaps(const char *name,
+		struct rx_pcaps *rx_queues,
+		const unsigned nb_rx_queues,
+		struct tx_pcaps *tx_queues,
+		const unsigned nb_tx_queues,
+		const unsigned numa_node,
+		struct rte_kvargs *kvlist,
+		int single_iface)
+{
+	struct pmd_internals *internals = NULL;
+	struct rte_eth_dev *eth_dev = NULL;
+	int ret;
+
+	ret = rte_eth_from_pcaps_common(name, rx_queues, nb_rx_queues,
+			tx_queues, nb_tx_queues, numa_node, kvlist,
+			&internals, &eth_dev);
+
+	if (ret < 0)
+		return ret;
+
+	/* store wether we are using a single interface for rx/tx or not */
+	internals->single_iface = single_iface;
+
+	eth_dev->rx_pkt_burst = eth_pcap_rx;
+	eth_dev->tx_pkt_burst = eth_pcap_tx;
+
+	return 0;
+}
+
+
+static int
+rte_pmd_pcap_devinit(const char *name, const char *params)
+{
+	unsigned numa_node, using_dumpers = 0;
+	int ret;
+	struct rte_kvargs *kvlist;
+	struct rx_pcaps pcaps;
+	struct tx_pcaps dumpers;
+
+	RTE_LOG(INFO, PMD, "Initializing pmd_pcap for %s\n", name);
+
+	numa_node = rte_socket_id();
+
+	gettimeofday(&start_time, NULL);
+	start_cycles = rte_get_timer_cycles();
+	hz = rte_get_timer_hz();
+
+	kvlist = rte_kvargs_parse(params, valid_arguments);
+	if (kvlist == NULL)
+		return -1;
+
+	/*
+	 * If iface argument is passed we open the NICs and use them for
+	 * reading / writing
+	 */
+	if (rte_kvargs_count(kvlist, ETH_PCAP_IFACE_ARG) == 1) {
+
+		ret = rte_kvargs_process(kvlist, ETH_PCAP_IFACE_ARG,
+				&open_rx_tx_iface, &pcaps);
+		if (ret < 0)
+			goto free_kvlist;
+		dumpers.pcaps[0] = pcaps.pcaps[0];
+		dumpers.names[0] = pcaps.names[0];
+		dumpers.types[0] = pcaps.types[0];
+		ret = rte_eth_from_pcaps(name, &pcaps, 1, &dumpers, 1,
+				numa_node, kvlist, 1);
+		goto free_kvlist;
+	}
+
+	/*
+	 * We check whether we want to open a RX stream from a real NIC or a
+	 * pcap file
+	 */
+	if ((pcaps.num_of_rx = rte_kvargs_count(kvlist, ETH_PCAP_RX_PCAP_ARG))) {
+		ret = rte_kvargs_process(kvlist, ETH_PCAP_RX_PCAP_ARG,
+				&open_rx_pcap, &pcaps);
+	} else {
+		pcaps.num_of_rx = rte_kvargs_count(kvlist,
+				ETH_PCAP_RX_IFACE_ARG);
+		ret = rte_kvargs_process(kvlist, ETH_PCAP_RX_IFACE_ARG,
+				&open_rx_iface, &pcaps);
+	}
+
+	if (ret < 0)
+		goto free_kvlist;
+
+	/*
+	 * We check whether we want to open a TX stream to a real NIC or a
+	 * pcap file
+	 */
+	if ((dumpers.num_of_tx = rte_kvargs_count(kvlist,
+			ETH_PCAP_TX_PCAP_ARG))) {
+		ret = rte_kvargs_process(kvlist, ETH_PCAP_TX_PCAP_ARG,
+				&open_tx_pcap, &dumpers);
+		using_dumpers = 1;
+	} else {
+		dumpers.num_of_tx = rte_kvargs_count(kvlist,
+				ETH_PCAP_TX_IFACE_ARG);
+		ret = rte_kvargs_process(kvlist, ETH_PCAP_TX_IFACE_ARG,
+				&open_tx_iface, &dumpers);
+	}
+
+	if (ret < 0)
+		goto free_kvlist;
+
+	if (using_dumpers)
+		ret = rte_eth_from_pcaps_n_dumpers(name, &pcaps, pcaps.num_of_rx,
+				&dumpers, dumpers.num_of_tx, numa_node, kvlist);
+	else
+		ret = rte_eth_from_pcaps(name, &pcaps, pcaps.num_of_rx, &dumpers,
+			dumpers.num_of_tx, numa_node, kvlist, 0);
+
+free_kvlist:
+	rte_kvargs_free(kvlist);
+	return ret;
+}
+
+static int
+rte_pmd_pcap_devuninit(const char *name)
+{
+	struct rte_eth_dev *eth_dev = NULL;
+
+	RTE_LOG(INFO, PMD, "Closing pcap ethdev on numa socket %u\n",
+			rte_socket_id());
+
+	if (name == NULL)
+		return -1;
+
+	/* reserve an ethdev entry */
+	eth_dev = rte_eth_dev_allocated(name);
+	if (eth_dev == NULL)
+		return -1;
+
+	rte_free(eth_dev->data->dev_private);
+	rte_free(eth_dev->data);
+
+	rte_eth_dev_release_port(eth_dev);
+
+	return 0;
+}
+
+static struct rte_driver pmd_pcap_drv = {
+	.name = "eth_pcap",
+	.type = PMD_VDEV,
+	.init = rte_pmd_pcap_devinit,
+	.uninit = rte_pmd_pcap_devuninit,
+};
+
+PMD_REGISTER_DRIVER(pmd_pcap_drv);