--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2013 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.
+ */
+
+#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_eth_pcap.h"
+#include "rte_eth_pcap_arg_parser.h"
+
+#define RTE_ETH_PCAP_SNAPSHOT_LEN 65535
+#define RTE_ETH_PCAP_SNAPLEN 4096
+#define RTE_ETH_PCAP_PROMISC 1
+#define RTE_ETH_PCAP_TIMEOUT -1
+#define RTE_ETH_PCAP_MBUFS 64
+#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"
+
+static char errbuf[PCAP_ERRBUF_SIZE];
+static struct timeval start_time;
+static uint64_t start_cycles;
+static uint64_t hz;
+
+struct pcap_rx_queue {
+ pcap_t *pcap;
+ struct rte_mempool *mb_pool;
+ volatile unsigned long rx_pkts;
+ volatile unsigned long err_pkts;
+};
+
+struct pcap_tx_queue {
+ pcap_dumper_t *dumper;
+ pcap_t *pcap;
+ volatile unsigned long tx_pkts;
+ volatile unsigned long err_pkts;
+};
+
+struct rx_pcaps {
+ unsigned num_of_rx;
+ pcap_t *pcaps[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];
+};
+
+struct pmd_internals {
+ unsigned nb_rx_queues;
+ unsigned nb_tx_queues;
+
+ struct pcap_rx_queue rx_queue[RTE_PMD_RING_MAX_RX_RINGS];
+ struct pcap_tx_queue tx_queue[RTE_PMD_RING_MAX_TX_RINGS];
+};
+
+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 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 = 10000,
+ .link_duplex = ETH_LINK_FULL_DUPLEX,
+ .link_status = 0
+};
+
+
+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;
+ static struct rte_mbuf *mbufs[RTE_ETH_PCAP_MBUFS] = { 0 };
+ struct pcap_rx_queue *pcap_q = queue;
+ uint16_t num_rx = 0;
+
+ if (unlikely(pcap_q->pcap == NULL || nb_pkts == 0))
+ return 0;
+
+ if(unlikely(!mbufs[0]))
+ for (i = 0; i < RTE_ETH_PCAP_MBUFS; i++)
+ mbufs[i] = rte_pktmbuf_alloc(pcap_q->mb_pool);
+
+ /* 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++) {
+ mbuf = mbufs[i % RTE_ETH_PCAP_MBUFS];
+ packet = pcap_next(pcap_q->pcap, &header);
+ if (unlikely(packet == NULL))
+ break;
+ if (unlikely(mbuf == NULL))
+ break;
+ rte_memcpy(mbuf->pkt.data, packet, header.len);
+ mbuf->pkt.data_len = (uint16_t)header.len;
+ mbuf->pkt.pkt_len = mbuf->pkt.data_len;
+ bufs[i] = mbuf;
+ num_rx++;
+ }
+ pcap_q->rx_pkts += num_rx;
+ 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;
+ 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.data_len;
+ header.caplen = header.len;
+ pcap_dump((u_char*) dumper_q->dumper, &header, mbuf->pkt.data);
+ rte_pktmbuf_free(mbuf);
+ num_tx++;
+ }
+
+ /*
+ * 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->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;
+
+ if (unlikely(nb_pkts == 0 || tx_queue->pcap == NULL))
+ return 0;
+
+ for (i = 0; i < nb_pkts; i++) {
+ mbuf = bufs[i];
+ ret = pcap_sendpacket(tx_queue->pcap, (u_char*) mbuf->pkt.data,
+ mbuf->pkt.data_len);
+ if(likely(!ret))
+ num_tx++;
+ rte_pktmbuf_free(mbuf);
+ }
+
+ tx_queue->tx_pkts += num_tx;
+ tx_queue->err_pkts += nb_pkts - num_tx;
+ return num_tx;
+}
+
+static int
+eth_dev_start(struct rte_eth_dev *dev)
+{
+ dev->data->dev_link.link_status = 1;
+ 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;
+ pcap_dumper_t *dumper;
+ pcap_t *pcap;
+ struct pmd_internals *internals = dev->data->dev_private;
+
+ for (i = 0; i < internals->nb_tx_queues; i++) {
+ dumper = internals->tx_queue[i].dumper;
+ if(dumper != NULL)
+ pcap_dump_close(dumper);
+ pcap = internals->tx_queue[i].pcap;
+ if(pcap != NULL)
+ pcap_close(pcap);
+ }
+
+ dev->data->dev_link.link_status = 0;
+}
+
+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->max_mac_addrs = 1;
+ dev_info->max_rx_pktlen = (uint32_t) -1;
+ dev_info->max_rx_queues = (uint16_t)internals->nb_rx_queues;
+ dev_info->max_tx_queues = (uint16_t)internals->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_total = 0, tx_total = 0, tx_err_total = 0;
+ const struct pmd_internals *internal = dev->data->dev_private;
+
+ memset(igb_stats, 0, sizeof(*igb_stats));
+ for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS && i < internal->nb_rx_queues;
+ i++) {
+ igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts;
+ rx_total += igb_stats->q_ipackets[i];
+ }
+
+ for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS && i < internal->nb_tx_queues;
+ i++) {
+ igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts;
+ igb_stats->q_errors[i] = internal->tx_queue[i].err_pkts;
+ tx_total += igb_stats->q_opackets[i];
+ tx_err_total += igb_stats->q_errors[i];
+ }
+
+ igb_stats->ipackets = rx_total;
+ igb_stats->opackets = tx_total;
+ igb_stats->oerrors = tx_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 < internal->nb_rx_queues; i++)
+ internal->rx_queue[i].rx_pkts = 0;
+ for (i = 0; i < internal->nb_tx_queues; i++) {
+ internal->tx_queue[i].tx_pkts = 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;
+ 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 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(char *value, void *extra_args)
+{
+ unsigned i;
+ char *pcap_filename = value;
+ struct rx_pcaps *pcaps = extra_args;
+ pcap_t *rx_pcap;
+
+ for (i = 0; i < pcaps->num_of_rx; i++) {
+ if ((rx_pcap = pcap_open_offline(pcap_filename, errbuf)) == NULL) {
+ RTE_LOG(ERR, PMD, "Couldn't open %s: %s\n", pcap_filename, errbuf);
+ return -1;
+ }
+ pcaps->pcaps[i] = rx_pcap;
+ }
+
+ return 0;
+}
+
+/*
+ * Opens a pcap file for writing and stores a reference to it
+ * for use it later on.
+ */
+static int
+open_tx_pcap(char *value, void *extra_args)
+{
+ unsigned i;
+ char *pcap_filename = value;
+ struct tx_pcaps *dumpers = extra_args;
+ pcap_t *tx_pcap;
+ pcap_dumper_t *dumper;
+
+ for (i = 0; i < dumpers->num_of_tx; i++) {
+ /*
+ * 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;
+ }
+ dumpers->dumpers[i] = dumper;
+ }
+
+ 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(char *value, void *extra_args)
+{
+ const char *iface = value;
+ pcap_t **pcap = extra_args;
+
+ if(open_iface_live(iface, pcap) < 0)
+ return -1;
+ return 0;
+}
+
+/*
+ * Opens a NIC for reading packets from it
+ */
+static inline int
+open_rx_iface(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_iface_live(iface, &pcap) < 0)
+ return -1;
+ pcaps->pcaps[i] = pcap;
+ }
+
+ return 0;
+}
+
+/*
+ * Opens a NIC for writing packets to it
+ */
+static inline int
+open_tx_iface(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_iface_live(iface, &pcap) < 0)
+ return -1;
+ pcaps->pcaps[i] = pcap;
+ }
+
+ return 0;
+}
+
+
+static int
+rte_pmd_init_internals(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_eth_dev_data *data = NULL;
+ struct rte_pci_device *pci_dev = NULL;
+
+ RTE_LOG(INFO, PMD,
+ "Creating pcap-backed ethdev on numa socket %u\n", numa_node);
+
+ /* now do all data allocation - for eth_dev structure, dummy pci driver
+ * and internal (private) data
+ */
+ data = rte_zmalloc_socket(NULL, sizeof(*data), 0, numa_node);
+ if (data == NULL)
+ goto error;
+
+ pci_dev = rte_zmalloc_socket(NULL, sizeof(*pci_dev), 0, numa_node);
+ if (pci_dev == NULL)
+ goto error;
+
+ *internals = rte_zmalloc_socket(NULL, sizeof(**internals), 0, numa_node);
+ if (*internals == NULL)
+ goto error;
+
+ /* reserve an ethdev entry */
+ *eth_dev = rte_eth_dev_allocate();
+ if (*eth_dev == NULL)
+ goto error;
+
+ /* now put it all together
+ * - store queue data in internals,
+ * - store numa_node info in pci_driver
+ * - point eth_dev_data to internals and pci_driver
+ * - 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 */
+
+ (*internals)->nb_rx_queues = nb_rx_queues;
+ (*internals)->nb_tx_queues = nb_tx_queues;
+
+ pci_dev->numa_node = numa_node;
+
+ data->dev_private = *internals;
+ data->port_id = (*eth_dev)->data->port_id;
+ 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 = ð_addr;
+
+ (*eth_dev)->data = data;
+ (*eth_dev)->dev_ops = &ops;
+ (*eth_dev)->pci_dev = pci_dev;
+
+ return 0;
+
+ error: if (data)
+ rte_free(data);
+ if (pci_dev)
+ rte_free(pci_dev);
+ if (*internals)
+ rte_free(*internals);
+ return -1;
+}
+
+int
+rte_eth_from_pcaps_n_dumpers(pcap_t * const rx_queues[],
+ const unsigned nb_rx_queues,
+ pcap_dumper_t * const tx_queues[],
+ const unsigned nb_tx_queues,
+ const unsigned numa_node)
+{
+ struct pmd_internals *internals = NULL;
+ struct rte_eth_dev *eth_dev = NULL;
+ 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(nb_rx_queues, nb_tx_queues, numa_node,
+ &internals, ð_dev) < 0)
+ return -1;
+
+ for (i = 0; i < nb_rx_queues; i++) {
+ internals->rx_queue->pcap = rx_queues[i];
+ }
+ for (i = 0; i < nb_tx_queues; i++) {
+ internals->tx_queue->dumper = tx_queues[i];
+ }
+
+ eth_dev->rx_pkt_burst = eth_pcap_rx;
+ eth_dev->tx_pkt_burst = eth_pcap_tx_dumper;
+
+ return 0;
+}
+
+int
+rte_eth_from_pcaps(pcap_t * const rx_queues[],
+ const unsigned nb_rx_queues,
+ pcap_t * const tx_queues[],
+ const unsigned nb_tx_queues,
+ const unsigned numa_node)
+{
+ struct pmd_internals *internals = NULL;
+ struct rte_eth_dev *eth_dev = NULL;
+ 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(nb_rx_queues, nb_tx_queues, numa_node,
+ &internals, ð_dev) < 0)
+ return -1;
+
+ for (i = 0; i < nb_rx_queues; i++) {
+ internals->rx_queue->pcap = rx_queues[i];
+ }
+ for (i = 0; i < nb_tx_queues; i++) {
+ internals->tx_queue->pcap = tx_queues[i];
+ }
+
+ eth_dev->rx_pkt_burst = eth_pcap_rx;
+ eth_dev->tx_pkt_burst = eth_pcap_tx;
+
+ return 0;
+}
+
+
+int
+rte_pmd_pcap_init(const char *name, const char *params)
+{
+ unsigned numa_node, using_dumpers = 0;
+ int ret;
+ struct args_dict dict;
+ struct rx_pcaps pcaps;
+ struct tx_pcaps dumpers;
+
+ rte_eth_pcap_init_args_dict(&dict);
+
+ numa_node = rte_socket_id();
+
+ gettimeofday(&start_time, NULL);
+ start_cycles = rte_get_timer_cycles();
+ hz = rte_get_timer_hz();
+
+ if (rte_eth_pcap_parse_args(&dict, name, params, valid_arguments) < 0)
+ return -1;
+
+ /*
+ * If iface argument is passed we open the NICs and use them for
+ * reading / writing
+ */
+ if (rte_eth_pcap_num_of_args(&dict, ETH_PCAP_IFACE_ARG) == 1) {
+
+ ret = rte_eth_pcap_post_process_arguments(&dict, ETH_PCAP_IFACE_ARG,
+ &open_rx_tx_iface, &pcaps.pcaps[0]);
+ if (ret < 0)
+ return -1;
+
+ return rte_eth_from_pcaps(pcaps.pcaps, 1, pcaps.pcaps, 1, numa_node);
+ }
+
+ /*
+ * We check whether we want to open a RX stream from a real NIC or a
+ * pcap file
+ */
+ if ((pcaps.num_of_rx = rte_eth_pcap_num_of_args(&dict, ETH_PCAP_RX_PCAP_ARG))) {
+ ret = rte_eth_pcap_post_process_arguments(&dict, ETH_PCAP_RX_PCAP_ARG,
+ &open_rx_pcap, &pcaps);
+ } else {
+ pcaps.num_of_rx = rte_eth_pcap_num_of_args(&dict,
+ ETH_PCAP_RX_IFACE_ARG);
+ ret = rte_eth_pcap_post_process_arguments(&dict, ETH_PCAP_RX_IFACE_ARG,
+ &open_rx_iface, &pcaps);
+ }
+
+ if (ret < 0)
+ return -1;
+
+ /*
+ * We check whether we want to open a TX stream to a real NIC or a
+ * pcap file
+ */
+ if ((dumpers.num_of_tx = rte_eth_pcap_num_of_args(&dict,
+ ETH_PCAP_TX_PCAP_ARG))) {
+ ret = rte_eth_pcap_post_process_arguments(&dict, ETH_PCAP_TX_PCAP_ARG,
+ &open_tx_pcap, &dumpers);
+ using_dumpers = 1;
+ } else {
+ dumpers.num_of_tx = rte_eth_pcap_num_of_args(&dict,
+ ETH_PCAP_TX_IFACE_ARG);
+ ret = rte_eth_pcap_post_process_arguments(&dict, ETH_PCAP_TX_IFACE_ARG,
+ &open_tx_iface, &dumpers);
+ }
+
+ if (ret < 0)
+ return -1;
+
+ if (using_dumpers)
+ return rte_eth_from_pcaps_n_dumpers(pcaps.pcaps, pcaps.num_of_rx,
+ dumpers.dumpers, dumpers.num_of_tx, numa_node);
+
+ return rte_eth_from_pcaps(pcaps.pcaps, pcaps.num_of_rx, dumpers.pcaps,
+ dumpers.num_of_tx, numa_node);
+
+}
+
--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2013 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.
+ */
+#include <string.h>
+#include <sys/user.h>
+#include <linux/binfmts.h>
+
+#include <rte_malloc.h>
+#include <rte_log.h>
+#include <rte_string_fns.h>
+
+#include "rte_eth_pcap_arg_parser.h"
+
+/*
+ * Initializes a non NULL dictionary reference to be used later on.
+ */
+inline int
+rte_eth_pcap_init_args_dict(struct args_dict *dict)
+{
+ dict->index = 0;
+ dict->size = RTE_ETH_PCAP_ARG_PARSER_MAX_ARGS;
+ memset(dict->pairs, 0, dict->size);
+ return 0;
+}
+
+/*
+ * Adds a key-value pair to a given non-NULL dictionary reference.
+ * The final key will be the name+key.
+ * Returns error in case the dictionary is full or if the key is duplicated.
+ */
+inline int
+rte_eth_pcap_add_pair_to_dict(struct args_dict *dict,
+ char *key,
+ char *val)
+{
+ unsigned i;
+ struct key_value* entry;
+
+ /* is the dictionary full? */
+ if (dict->index >= dict->size) {
+ RTE_LOG(ERR, PMD, "Couldn't add %s, dictionary is full\n", key);
+ return -1;
+ }
+
+ /* Check if the key is duplicated */
+ for (i = 0; i < dict->index; i++) {
+ entry = &dict->pairs[i];
+ if (strcmp(entry->key, key) == 0) {
+ RTE_LOG(ERR, PMD, "Couldn't add %s, duplicated key\n", key);
+ return -1;
+ }
+ }
+
+ entry = &dict->pairs[dict->index];
+ entry->key = key;
+ entry->value = val;
+ dict->index++;
+ return 0;
+
+}
+
+#define RTE_ETH_PCAP_PAIRS_DELIM ';'
+#define RTE_ETH_PCAP_KEY_VALUE_DELIM '='
+/*
+ * Receives a string with a list of arguments following the pattern
+ * key=value;key=value;... and inserts them into the non NULL dictionary.
+ * strtok is used so the params string will be copied to be modified.
+ */
+inline int
+rte_eth_pcap_tokenize_args(struct args_dict *dict,
+ const char *name,
+ const char *params)
+{
+ int i;
+ char *args;
+ char *pairs[RTE_ETH_PCAP_ARG_PARSER_MAX_ARGS];
+ char *pair[2];
+ int num_of_pairs;
+
+ /* If params are empty, nothing to do */
+ if (params == NULL || params[0] == 0) {
+ RTE_LOG(ERR, PMD, "Couldn't parse %s device, empty arguments\n", name);
+ return -1;
+ }
+
+ /* Copy the const char *params to a modifiable string
+ * to pass to rte_strsplit
+ */
+ args = strdup(params);
+ if(args == NULL){
+ RTE_LOG(ERR, PMD, "Couldn't parse %s device \n", name);
+ return -1;
+ }
+
+ num_of_pairs = rte_strsplit(args, strnlen(args, MAX_ARG_STRLEN), pairs,
+ RTE_ETH_PCAP_ARG_PARSER_MAX_ARGS, RTE_ETH_PCAP_PAIRS_DELIM);
+
+ for (i = 0; i < num_of_pairs; i++) {
+ pair[0] = NULL;
+ pair[1] = NULL;
+
+ rte_strsplit(pairs[i], strnlen(pairs[i], MAX_ARG_STRLEN), pair, 2,
+ RTE_ETH_PCAP_KEY_VALUE_DELIM);
+
+ if (pair[0] == NULL || pair[1] == NULL || pair[0][0] == 0
+ || pair[1][0] == 0) {
+ RTE_LOG(ERR, PMD,
+ "Couldn't parse %s device, wrong key or value \n", name);
+ goto error;
+ }
+
+ if (rte_eth_pcap_add_pair_to_dict(dict, pair[0], pair[1]) < 0)
+ goto error;
+ }
+ return 0;
+
+error:
+ rte_free(args);
+ return -1;
+}
+
+/*
+ * Determines whether a key is valid or not by looking
+ * into a list of valid keys.
+ */
+static inline int
+is_valid_key(const char *valid[],
+ struct key_value *pair)
+{
+ const char **valid_ptr;
+
+ for (valid_ptr = valid; *valid_ptr != NULL; valid_ptr++)
+ if (strstr(pair->key, *valid_ptr) != NULL)
+ return 1;
+ return 0;
+}
+
+/*
+ * Determines whether all keys are valid or not by looking
+ * into a list of valid keys.
+ */
+static inline int
+check_for_valid_keys(struct args_dict *dict,
+ const char *valid[])
+{
+ unsigned k_index, ret;
+ struct key_value *pair;
+
+ for (k_index = 0; k_index < dict->index; k_index++) {
+ pair = &dict->pairs[k_index];
+ ret = is_valid_key(valid, pair);
+ if (!ret) {
+ RTE_LOG(ERR, PMD,
+ "Error parsing device, invalid key %s\n", pair->key);
+ return -1;
+ }
+ }
+ return 0;
+}
+
+/*
+ * Returns the number of times a given arg_name exists on a dictionary.
+ * E.g. given a dict = { rx0 = 0, rx1 = 1, tx0 = 2 } the number of args for
+ * arg "rx" will be 2.
+ */
+inline unsigned
+rte_eth_pcap_num_of_args(struct args_dict *dict, const char *arg_name)
+{
+ unsigned k_index;
+ struct key_value *pair;
+ unsigned num_of_keys;
+
+ num_of_keys = 0;
+ for (k_index = 0; k_index < dict->index; k_index++) {
+ pair = &dict->pairs[k_index];
+ if (strcmp(pair->key, arg_name) == 0)
+ num_of_keys++;
+ }
+
+ return num_of_keys;
+}
+
+/*
+ * Calls the handler function for a given arg_name passing the
+ * value on the dictionary for that key and a given extra argument.
+ */
+inline int
+rte_eth_pcap_post_process_arguments(struct args_dict *dict,
+ const char *arg_name,
+ arg_handler_t handler,
+ void *extra_args)
+{
+ unsigned k_index;
+ struct key_value *pair;
+
+ for (k_index = 0; k_index < dict->index; k_index++) {
+ pair = &dict->pairs[k_index];
+ if (strstr(pair->key, arg_name) != NULL) {
+ if ((*handler)(pair->value, extra_args) < 0)
+ return -1;
+ }
+ }
+ return 0;
+}
+
+/*
+ * Parses the arguments "key=value;key=value;..." string and returns
+ * a simple dictionary implementation containing these pairs. It also
+ * checks if only valid keys were used.
+ */
+inline int
+rte_eth_pcap_parse_args(struct args_dict *dict,
+ const char *name,
+ const char *args,
+ const char *valids[])
+{
+
+ int ret;
+
+ ret = rte_eth_pcap_tokenize_args(dict, name, args);
+ if (ret < 0)
+ return ret;
+
+ return check_for_valid_keys(dict, valids);
+}
+
git.droids-corp.org / dpdk.git / commitdiff