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-rw-r--r--net/openvswitch/files/patch-lib-netdev-bsd.c1581
1 files changed, 1581 insertions, 0 deletions
diff --git a/net/openvswitch/files/patch-lib-netdev-bsd.c b/net/openvswitch/files/patch-lib-netdev-bsd.c
new file mode 100644
index 000000000000..80255ad43aa5
--- /dev/null
+++ b/net/openvswitch/files/patch-lib-netdev-bsd.c
@@ -0,0 +1,1581 @@
+diff -NBubrw lib/netdev-bsd.c.orig lib/netdev-bsd.c
+--- lib/netdev-bsd.c.orig 1970-01-01 01:00:00.000000000 +0100
++++ lib/netdev-bsd.c 2011-11-28 15:13:26.920783291 +0100
+@@ -0,0 +1,1577 @@
++/*
++ * Copyright (c) 2011 Gaetano Catalli.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions are met:
++ *
++ * 1. Redistributions of source code must retain the above copyright notice,
++ * this list of conditions and the following disclaimer.
++ *
++ * 2. 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.
++ *
++ * THIS SOFTWARE IS PROVIDED ``AS IS'' WITHOUT ANY WARRANTIES OF ANY KIND.
++ *
++ */
++
++#include <stdlib.h>
++#include <config.h>
++#include <assert.h>
++#include <errno.h>
++#include <fcntl.h>
++#include <sys/types.h>
++#include <sys/time.h>
++#include <sys/ioctl.h>
++#include <sys/socket.h>
++#include <sys/sockio.h>
++#include <ifaddrs.h>
++#include <pcap/pcap.h>
++#include <net/if.h>
++#include <net/if_dl.h>
++#include <net/if_media.h>
++#include <net/if_tap.h>
++#include <netinet/in.h>
++#include <net/if_mib.h>
++#include <poll.h>
++#include <string.h>
++#include <unistd.h>
++#include <sys/sysctl.h>
++
++#include "rtbsd.h"
++#include "coverage.h"
++#include "dynamic-string.h"
++#include "fatal-signal.h"
++#include "netdev-provider.h"
++#include "ofpbuf.h"
++#include "openflow/openflow.h"
++#include "packets.h"
++#include "poll-loop.h"
++#include "socket-util.h"
++#include "shash.h"
++#include "svec.h"
++#include "vlog.h"
++
++VLOG_DEFINE_THIS_MODULE(netdev_bsd)
++
++
++/*
++ * This file implements objects to access interfaces.
++ * Externally, interfaces are represented by two structures:
++ * + struct netdev_dev, representing a network device,
++ * containing e.g. name and a refcount;
++ * We can have private variables by embedding the
++ * struct netdev_dev into our own structure
++ * (e.g. netdev_dev_bsd)
++ *
++ * + struct netdev, representing an instance of an open netdev_dev.
++ * The structure contains a pointer to the 'struct netdev'
++ * representing the device. Again, private information
++ * such as file descriptor etc. are stored in our
++ * own struct netdev_bsd which includes a struct netdev.
++ *
++ * Both 'struct netdev' and 'struct netdev_dev' are referenced
++ * in containers which hold pointers to the data structures.
++ * We can reach our own struct netdev_XXX_bsd by putting a
++ * struct netdev_XXX within our own struct, and using CONTAINER_OF
++ * to access the parent structure.
++ */
++struct netdev_bsd {
++ struct netdev netdev;
++
++ int netdev_fd; /* Selectable file descriptor for the network device.
++ This descriptor will be used for polling operations */
++
++ pcap_t *pcap_handle; /* Packet capture descriptor for a system network
++ device */
++};
++
++struct netdev_dev_bsd {
++ struct netdev_dev netdev_dev;
++ unsigned int cache_valid;
++
++ int ifindex;
++ uint8_t etheraddr[ETH_ADDR_LEN];
++ struct in_addr in4;
++ struct in6_addr in6;
++ int mtu;
++ int carrier;
++
++ bool tap_opened;
++ int tap_fd; /* TAP character device, if any */
++};
++
++
++enum {
++ VALID_IFINDEX = 1 << 0,
++ VALID_ETHERADDR = 1 << 1,
++ VALID_IN4 = 1 << 2,
++ VALID_IN6 = 1 << 3,
++ VALID_MTU = 1 << 4,
++ VALID_CARRIER = 1 << 5
++};
++
++/* An AF_INET socket (used for ioctl operations). */
++static int af_inet_sock = -1;
++
++#define PCAP_SNAPLEN 1024
++
++/*
++ * A BSD network device notifier.
++ *
++ * Represents a handler to be invoked on a device when some event occurs.
++ * Contains handler, parameters (in netdev_notifier) and link fields for the
++ * list (in struct list).
++ */
++struct netdev_bsd_notifier {
++ struct netdev_notifier notifier; /* Handler and arguments */
++ struct list node; /* Link fields for the list */
++};
++
++/*
++ * All 'struct netdev_bsd_notifier' objects are linked as children of a generic
++ * 'struct shash_node', there is one shash_node per interface, and the
++ * interface name is the search key. In turn, all the 'struct shash_node' are
++ * stored in a container, all_bsd_notifiers.
++ *
++ * A 'netdev_bsd_notifier' is created and added to the all_bsd_notifiers
++ * using 'netdev_bsd_poll_add()' XXX again, same code as netdev-linux
++ */
++static struct shash all_bsd_notifiers =
++ SHASH_INITIALIZER(&all_bsd_notifiers);
++
++/*
++ * Openvswitch can register multiple handlers on route-related events.
++ * The descriptor for each handler is a struct rtbsd_notifier
++ * that contains the function and a parameter.
++ *
++ * In this module we call rtbsd_notifier_register() to invoke
++ * the function netdev_bsd_poll_cb() on the all_bsd_notifiers above.
++ */
++static struct rtbsd_notifier netdev_bsd_poll_notifier;
++
++/*
++ * Notifier used to invalidate device informations in case of status change.
++ *
++ * It will be registered with a 'rtbsd_notifier_register()' when the first
++ * device will be created with the call of either 'netdev_bsd_tap_create()' or
++ * 'netdev_bsd_system_create()'.
++ *
++ * The callback associated with this notifier ('netdev_bsd_cache_cb()') will
++ * invalidate cached information about the device.
++ */
++static struct rtbsd_notifier netdev_bsd_cache_notifier;
++static int cache_notifier_refcount;
++
++static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
++
++static int netdev_bsd_do_ioctl(const struct netdev *, struct ifreq *,
++ unsigned long cmd, const char *cmd_name);
++static void destroy_tap(int fd, const char *name);
++static int get_flags(const struct netdev *, int *flagsp);
++static int set_flags(struct netdev *, int flags);
++static int do_set_addr(struct netdev *netdev,
++ int ioctl_nr, const char *ioctl_name,
++ struct in_addr addr);
++static int get_etheraddr(const char *netdev_name, uint8_t ea[ETH_ADDR_LEN]);
++static int set_etheraddr(const char *netdev_name, int hwaddr_family,
++ int hwaddr_len, const uint8_t[ETH_ADDR_LEN]);
++static int get_ifindex(const struct netdev *, int *ifindexp);
++
++static int netdev_bsd_init(void);
++
++static bool
++is_netdev_bsd_class(const struct netdev_class *netdev_class)
++{
++ return netdev_class->init == netdev_bsd_init;
++}
++
++static struct netdev_bsd *
++netdev_bsd_cast(const struct netdev *netdev)
++{
++ assert(is_netdev_bsd_class(netdev_dev_get_class(netdev_get_dev(netdev))));
++ return CONTAINER_OF(netdev, struct netdev_bsd, netdev);
++}
++
++static struct netdev_dev_bsd *
++netdev_dev_bsd_cast(const struct netdev_dev *netdev_dev)
++{
++ assert(is_netdev_bsd_class(netdev_dev_get_class(netdev_dev)));
++ return CONTAINER_OF(netdev_dev, struct netdev_dev_bsd, netdev_dev);
++}
++
++/* Initialize the AF_INET socket used for ioctl operations */
++static int
++netdev_bsd_init(void)
++{
++ static int status = -1;
++
++ if (status >= 0) { /* already initialized */
++ return status;
++ }
++
++ af_inet_sock = socket(AF_INET, SOCK_DGRAM, 0);
++ status = af_inet_sock >= 0 ? 0 : errno;
++
++ if (status) {
++ VLOG_ERR("failed to create inet socket: %s", strerror(status));
++ }
++
++ return status;
++}
++
++/*
++ * Perform periodic work needed by netdev. In BSD netdevs it checks for any
++ * interface status changes, and eventually calls all the user callbacks.
++ */
++static void
++netdev_bsd_run(void)
++{
++ rtbsd_notifier_run();
++}
++
++/*
++ * Arranges for poll_block() to wake up if the "run" member function needs to
++ * be called.
++ */
++static void
++netdev_bsd_wait(void)
++{
++ rtbsd_notifier_wait();
++}
++
++/* Invalidate cache in case of interface status change. */
++static void
++netdev_bsd_cache_cb(const struct rtbsd_change *change,
++ void *aux OVS_UNUSED)
++{
++ struct netdev_dev_bsd *dev;
++
++ if (change) {
++ struct netdev_dev *base_dev = netdev_dev_from_name(change->if_name);
++
++ if (base_dev) {
++ const struct netdev_class *netdev_class =
++ netdev_dev_get_class(base_dev);
++
++ if (is_netdev_bsd_class(netdev_class)) {
++ dev = netdev_dev_bsd_cast(base_dev);
++ dev->cache_valid = 0;
++ }
++ }
++ } else {
++ /*
++ * XXX the API is lacking, we should be able to iterate on the list of
++ * netdevs without having to store the info in a temp shash.
++ */
++ struct shash device_shash;
++ struct shash_node *node;
++
++ shash_init(&device_shash);
++ netdev_dev_get_devices(&netdev_bsd_class, &device_shash);
++ SHASH_FOR_EACH (node, &device_shash) {
++ dev = node->data;
++ dev->cache_valid = 0;
++ }
++ shash_destroy(&device_shash);
++ }
++}
++
++/* Allocate a netdev_dev_bsd structure */
++static int
++netdev_bsd_create_system(const char *name, const char *type OVS_UNUSED,
++ const struct shash *args OVS_UNUSED,
++ struct netdev_dev **netdev_devp)
++{
++ struct netdev_dev_bsd *netdev_dev;
++ int ret = 0;
++
++ if (!cache_notifier_refcount) {
++ ret = rtbsd_notifier_register(&netdev_bsd_cache_notifier,
++ netdev_bsd_cache_cb, NULL);
++ if (ret) {
++ return ret;
++ }
++ }
++ cache_notifier_refcount++;
++
++ netdev_dev = xzalloc(sizeof *netdev_dev);
++ netdev_dev_init(&netdev_dev->netdev_dev, name, &netdev_bsd_class);
++ *netdev_devp = &netdev_dev->netdev_dev;
++
++ return ret;
++}
++
++/*
++ * Allocate a netdev_dev_bsd structure with 'tap' class.
++ */
++static int
++netdev_bsd_create_tap(const char *name, const char *type OVS_UNUSED,
++ const struct shash *args OVS_UNUSED,
++ struct netdev_dev **netdev_devp)
++{
++ struct netdev_dev_bsd *netdev_dev;
++ int error = 0;
++ struct ifreq ifr;
++
++ if (!cache_notifier_refcount) {
++ error = rtbsd_notifier_register(&netdev_bsd_cache_notifier,
++ netdev_bsd_cache_cb, NULL);
++ if (error) {
++ return error;
++ }
++ }
++ cache_notifier_refcount++;
++
++ /* allocate the device structure and set the internal flag */
++ netdev_dev = xzalloc(sizeof *netdev_dev);
++
++ memset(&ifr, 0, sizeof(ifr));
++
++ /* Create a tap device by opening /dev/tap. The TAPGIFNAME ioctl is used
++ * to retrieve the name of the tap device. */
++ netdev_dev->tap_fd = open("/dev/tap", O_RDWR);
++ if (netdev_dev->tap_fd < 0) {
++ error = errno;
++ VLOG_WARN("opening \"/dev/tap\" failed: %s", strerror(error));
++ goto error;
++ }
++
++ /* Retrieve tap name (e.g. tap0) */
++ if (ioctl(netdev_dev->tap_fd, TAPGIFNAME, &ifr) == -1) {
++ /* XXX Need to destroy the device? */
++ error = errno;
++ goto error;
++ }
++
++ /* Change the name of the tap device */
++ ifr.ifr_data = (void *)name;
++ if (ioctl(af_inet_sock, SIOCSIFNAME, &ifr) == -1) {
++ error = errno;
++ destroy_tap(netdev_dev->tap_fd, ifr.ifr_name);
++ goto error;
++ }
++
++ /* set non-blocking. */
++ error = set_nonblocking(netdev_dev->tap_fd);
++ if (error) {
++ destroy_tap(netdev_dev->tap_fd, name);
++ goto error;
++ }
++
++ /* Turn device UP */
++ ifr.ifr_flags = (uint16_t)IFF_UP;
++ ifr.ifr_flagshigh = 0;
++ strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
++ if (ioctl(af_inet_sock, SIOCSIFFLAGS, &ifr) == -1) {
++ error = errno;
++ destroy_tap(netdev_dev->tap_fd, name);
++ goto error;
++ }
++
++ /* initialize the device structure and
++ * link the structure to its netdev */
++ netdev_dev_init(&netdev_dev->netdev_dev, name, &netdev_tap_class);
++ *netdev_devp = &netdev_dev->netdev_dev;
++
++ return 0;
++
++error:
++ free(netdev_dev);
++ return error;
++}
++
++static void
++netdev_bsd_destroy(struct netdev_dev *netdev_dev_)
++{
++ struct netdev_dev_bsd *netdev_dev = netdev_dev_bsd_cast(netdev_dev_);
++
++ cache_notifier_refcount--;
++ if (cache_notifier_refcount == 0) {
++ rtbsd_notifier_unregister(&netdev_bsd_cache_notifier);
++ }
++
++ if (netdev_dev->tap_fd >= 0 &&
++ !strcmp(netdev_dev_get_type(netdev_dev_), "tap")) {
++ destroy_tap(netdev_dev->tap_fd, netdev_dev_get_name(netdev_dev_));
++ }
++ free(netdev_dev);
++}
++
++
++static int
++netdev_bsd_open_system(struct netdev_dev *netdev_dev_, int ethertype,
++ struct netdev **netdevp)
++{
++ struct netdev_dev_bsd *netdev_dev = netdev_dev_bsd_cast(netdev_dev_);
++ struct netdev_bsd *netdev;
++ int error;
++ enum netdev_flags flags;
++
++ /* Allocate network device. */
++ netdev = xcalloc(1, sizeof *netdev);
++ netdev->netdev_fd = -1;
++ netdev_init(&netdev->netdev, netdev_dev_);
++
++ /* Verify that the netdev really exists by attempting to read its flags */
++ error = netdev_get_flags(&netdev->netdev, &flags);
++ if (error == ENXIO) {
++ goto error;
++ }
++
++ /* The first user that opens a tap port(from dpif_create_and_open()) will
++ * receive the file descriptor associated with the tap device. Instead, the
++ * following users will open the tap device as a normal 'system' device. */
++ if (!strcmp(netdev_dev_get_type(netdev_dev_), "tap") &&
++ !netdev_dev->tap_opened) {
++ netdev_dev->tap_opened = true;
++ netdev->netdev_fd = netdev_dev->tap_fd;
++ } else if (ethertype != NETDEV_ETH_TYPE_NONE) {
++ char errbuf[PCAP_ERRBUF_SIZE];
++ int one = 1;
++
++ /* open the pcap device. The device is opened in non-promiscuous mode
++ * because the interface flags are manually set by the caller. */
++ netdev->pcap_handle = pcap_open_live(netdev_dev_->name, PCAP_SNAPLEN,
++ 0, 1000, errbuf);
++ if (netdev->pcap_handle == NULL) {
++ error = errno;
++ goto error;
++ }
++
++ /* initialize netdev->netdev_fd */
++ netdev->netdev_fd = pcap_get_selectable_fd(netdev->pcap_handle);
++ if (netdev->netdev_fd == -1) {
++ error = errno;
++ goto error;
++ }
++
++ /* Set non-blocking mode. Also the BIOCIMMEDIATE ioctl must be called
++ * on the file descriptor returned by pcap_get_selectable_fd to achieve
++ * a real non-blocking behaviour.*/
++ error = pcap_setnonblock(netdev->pcap_handle, 1, errbuf);
++ if (error == -1) {
++ error = errno;
++ goto error;
++ }
++
++ /* This call assure that reads return immediately upon packet reception.
++ * Otherwise, a read will block until either the kernel buffer becomes
++ * full or a timeout occurs. */
++ if(ioctl(netdev->netdev_fd, BIOCIMMEDIATE, &one) < 0 ) {
++ VLOG_ERR("ioctl(BIOCIMMEDIATE) on %s device failed: %s",
++ netdev_dev_get_name(netdev_dev_), strerror(errno));
++ error = errno;
++ goto error;
++ }
++
++ /* Capture only incoming packets */
++ error = pcap_setdirection(netdev->pcap_handle, PCAP_D_IN);
++ if (error == -1) {
++ error = errno;
++ goto error;
++ }
++ }
++ *netdevp = &netdev->netdev;
++
++ return 0;
++
++error:
++ netdev_uninit(&netdev->netdev, true);
++ return error;
++}
++
++
++/* Close a 'netdev'. */
++static void
++netdev_bsd_close(struct netdev *netdev_)
++{
++ struct netdev_bsd *netdev = netdev_bsd_cast(netdev_);
++
++ if (netdev->netdev_fd >= 0 && strcmp(netdev_get_type(netdev_), "tap")) {
++ pcap_close(netdev->pcap_handle);
++ }
++
++ free(netdev);
++}
++
++
++/* Initializes 'svec' with a list of the names of all known network devices. */
++static int
++netdev_bsd_enumerate(struct svec *svec)
++{
++ struct if_nameindex *names;
++
++ names = if_nameindex();
++ if (names) {
++ size_t i;
++
++ for (i = 0; names[i].if_name != NULL; i++) {
++ svec_add(svec, names[i].if_name);
++ }
++ if_freenameindex(names);
++ return 0;
++ } else {
++ VLOG_WARN("could not obtain list of network device names: %s",
++ strerror(errno));
++ return errno;
++ }
++}
++
++/* The recv callback of the netdev class returns the number of bytes of the
++ * received packet.
++ *
++ * This can be done by the pcap_next() function. Unfortunately pcap_next() does
++ * not make difference between a missing packet on the capture interface and
++ * an error during the file capture. We can use the pcap_dispatch() function
++ * instead, which is able to distinguish between errors and null packet.
++ *
++ * To make pcap_dispatch() returns the number of bytes read from the interface
++ * we need to define the following callback and argument.
++ */
++struct pcap_arg {
++ void *data;
++ int size;
++ int retval;
++};
++
++/*
++ * This callback will be executed on every captured packet.
++ *
++ * If the packet captured by pcap_dispatch() does not fit the pcap buffer,
++ * pcap returns a truncated packet and we follow this behavior.
++ *
++ * The argument args->retval is the packet size in bytes.
++ */
++static void
++proc_pkt(u_char *args_, const struct pcap_pkthdr *hdr, const u_char *packet)
++{
++ struct pcap_arg *args = (struct pcap_arg *)args_;
++
++ if (args->size < hdr->len) {
++ printf("%s Warning: Packet truncated'n", __func__);
++ args->retval = args->size;
++ } else {
++ args->retval = hdr->len;
++ }
++
++ /* copy the packet to our buffer */
++ memcpy(args->data, packet, args->retval);
++}
++
++/*
++ * This function attempts to receive a packet from the specified network
++ * device. It is assumed that the network device is a system device or a tap
++ * device opened as a system one. In this case the read operation is performed
++ * on the 'netdev' pcap descriptor.
++ */
++static int
++netdev_bsd_recv_system(struct netdev_bsd *netdev, void *data, size_t size)
++{
++ struct pcap_arg arg;
++ int ret;
++
++ if (netdev->netdev_fd < 0) {
++ /* Device was opened with NETDEV_ETH_TYPE_NONE. */
++ return -EAGAIN;
++ }
++
++ /* prepare the pcap argument to store the packet */
++ arg.size = size;
++ arg.data = data;
++
++ for (;;) {
++ ret = pcap_dispatch(netdev->pcap_handle, 1, proc_pkt, (u_char *)&arg);
++
++ if (ret > 0) {
++ return arg.retval; /* arg.retval < 0 is handled in the caller */
++ }
++ if (ret == -1) {
++ if (errno == EINTR) {
++ continue;
++ }
++ }
++
++ return -EAGAIN;
++ }
++}
++
++/*
++ * This function attempts to receive a packet from the specified network
++ * device. It is assumed that the network device is a tap device and the
++ * 'netdev_fd' member of the 'netdev' structure is initialized with the tap
++ * file descriptor.
++ */
++static int
++netdev_bsd_recv_tap(struct netdev_bsd *netdev, void *data, size_t size)
++{
++ if (netdev->netdev_fd < 0) {
++ /* Device was opened with NETDEV_ETH_TYPE_NONE. */
++ return -EAGAIN;
++ }
++
++ for (;;) {
++ ssize_t retval = read(netdev->netdev_fd, data, size);
++ if (retval >= 0) {
++ return retval;
++ } else if (errno != EINTR) {
++ if (errno != EAGAIN) {
++ VLOG_WARN_RL(&rl, "error receiving Ethernet packet on %s: %s",
++ strerror(errno), netdev->netdev.netdev_dev->name);
++ }
++ return -errno;
++ }
++ }
++}
++
++
++/*
++ * According with the nature of the device a different function must be called.
++ * If the device is the bridge local port the 'netdev_bsd_recv_tap' function
++ * must be called, otherwise the 'netdev_bsd_recv_system' function is called.
++ *
++ * type!="tap" ---> system device.
++ * type=="tap" && netdev_fd == tap_fd ---> internal tap device
++ * type=="tap" && netdev_fd != tap_fd ---> internal tap device
++ * opened as a system
++ * device.
++ */
++static int
++netdev_bsd_recv(struct netdev *netdev_, void* data, size_t size)
++{
++ struct netdev_bsd *netdev = netdev_bsd_cast(netdev_);
++ struct netdev_dev_bsd * netdev_dev =
++ netdev_dev_bsd_cast(netdev_get_dev(netdev_));
++
++ if (!strcmp(netdev_get_type(netdev_), "tap") &&
++ netdev->netdev_fd == netdev_dev->tap_fd) {
++ return netdev_bsd_recv_tap(netdev, data, size);
++ } else {
++ return netdev_bsd_recv_system(netdev, data, size);
++ }
++}
++
++
++/*
++ * Registers with the poll loop to wake up from the next call to poll_block()
++ * when a packet is ready to be received with netdev_recv() on 'netdev'.
++ */
++static void
++netdev_bsd_recv_wait(struct netdev *netdev_)
++{
++ struct netdev_bsd *netdev = netdev_bsd_cast(netdev_);
++
++ if (netdev->netdev_fd >= 0) {
++ poll_fd_wait(netdev->netdev_fd, POLLIN);
++ }
++}
++
++/* Discards all packets waiting to be received from 'netdev'. */
++static int
++netdev_bsd_drain(struct netdev *netdev_)
++{
++ struct ifreq ifr;
++ struct netdev_bsd *netdev = netdev_bsd_cast(netdev_);
++
++ strcpy(ifr.ifr_name, netdev_get_name(netdev_));
++ if (ioctl(netdev->netdev_fd, BIOCFLUSH, &ifr) == -1) {
++ VLOG_DBG_RL(&rl, "%s: ioctl(BIOCFLUSH) failed: %s",
++ netdev_get_name(netdev_), strerror(errno));
++ return errno;
++ }
++ return 0;
++}
++
++/*
++ * Send a packet on the specified network device. The device could be either a
++ * system or a tap device.
++ */
++static int
++netdev_bsd_send(struct netdev *netdev_, const void *data, size_t size)
++{
++ struct netdev_bsd *netdev = netdev_bsd_cast(netdev_);
++ struct netdev_dev_bsd * netdev_dev =
++ netdev_dev_bsd_cast(netdev_get_dev(netdev_));
++
++ /* XXX should support sending even if 'ethertype' was NETDEV_ETH_TYPE_NONE.
++ */
++ if (netdev->netdev_fd < 0) {
++ return EPIPE;
++ }
++
++ for (;;) {
++ ssize_t retval;
++ if (!strcmp(netdev_get_type(netdev_), "tap") &&
++ netdev_dev->tap_fd == netdev->netdev_fd) {
++ retval = write(netdev->netdev_fd, data, size);
++ } else {
++ retval = pcap_inject(netdev->pcap_handle, data, size);
++ }
++ if (retval < 0) {
++ if (errno == EINTR) {
++ continue;
++ } else if (errno != EAGAIN) {
++ VLOG_WARN_RL(&rl, "error sending Ethernet packet on %s: %s",
++ netdev_get_name(netdev_), strerror(errno));
++ }
++ return errno;
++ } else if (retval != size) {
++ VLOG_WARN_RL(&rl, "sent partial Ethernet packet (%zd bytes of "
++ "%zu) on %s", retval, size,
++ netdev_get_name(netdev_));
++ return EMSGSIZE;
++ } else {
++ return 0;
++ }
++ }
++}
++
++/*
++ * Registers with the poll loop to wake up from the next call to poll_block()
++ * when the packet transmission queue has sufficient room to transmit a packet
++ * with netdev_send().
++ */
++static void
++netdev_bsd_send_wait(struct netdev *netdev_)
++{
++ struct netdev_bsd *netdev = netdev_bsd_cast(netdev_);
++
++ if (netdev->netdev_fd < 0) { /* Nothing to do. */
++ return;
++ }
++
++ if (strcmp(netdev_get_type(netdev_), "tap")) {
++ poll_fd_wait(netdev->netdev_fd, POLLOUT);
++ } else {
++ /* TAP device always accepts packets. */
++ poll_immediate_wake();
++ }
++}
++
++/*
++ * Attempts to set 'netdev''s MAC address to 'mac'. Returns 0 if successful,
++ * otherwise a positive errno value.
++ */
++static int
++netdev_bsd_set_etheraddr(struct netdev *netdev_,
++ const uint8_t mac[ETH_ADDR_LEN])
++{
++ struct netdev_dev_bsd *netdev_dev =
++ netdev_dev_bsd_cast(netdev_get_dev(netdev_));
++ int error;
++
++ if (!(netdev_dev->cache_valid & VALID_ETHERADDR)
++ || !eth_addr_equals(netdev_dev->etheraddr, mac)) {
++ error = set_etheraddr(netdev_get_name(netdev_), AF_LINK, ETH_ADDR_LEN,
++ mac);
++ if (!error) {
++ netdev_dev->cache_valid |= VALID_ETHERADDR;
++ memcpy(netdev_dev->etheraddr, mac, ETH_ADDR_LEN);
++ }
++ } else {
++ error = 0;
++ }
++ return error;
++}
++
++/*
++ * Returns a pointer to 'netdev''s MAC address. The caller must not modify or
++ * free the returned buffer.
++ */
++static int
++netdev_bsd_get_etheraddr(const struct netdev *netdev_,
++ uint8_t mac[ETH_ADDR_LEN])
++{
++ struct netdev_dev_bsd *netdev_dev =
++ netdev_dev_bsd_cast(netdev_get_dev(netdev_));
++
++ if (!(netdev_dev->cache_valid & VALID_ETHERADDR)) {
++ int error = get_etheraddr(netdev_get_name(netdev_),
++ netdev_dev->etheraddr);
++ if (error) {
++ return error;
++ }
++ netdev_dev->cache_valid |= VALID_ETHERADDR;
++ }
++ memcpy(mac, netdev_dev->etheraddr, ETH_ADDR_LEN);
++
++ return 0;
++}
++
++/*
++ * Returns the maximum size of transmitted (and received) packets on 'netdev',
++ * in bytes, not including the hardware header; thus, this is typically 1500
++ * bytes for Ethernet devices.
++ */
++static int
++netdev_bsd_get_mtu(const struct netdev *netdev_, int *mtup)
++{
++ struct netdev_dev_bsd *netdev_dev =
++ netdev_dev_bsd_cast(netdev_get_dev(netdev_));
++
++ if (!(netdev_dev->cache_valid & VALID_MTU)) {
++ struct ifreq ifr;
++ int error;
++
++ error = netdev_bsd_do_ioctl(netdev_, &ifr, SIOCGIFMTU, "SIOCGIFMTU");
++ if (error) {
++ return error;
++ }
++ netdev_dev->mtu = ifr.ifr_mtu;
++ netdev_dev->cache_valid |= VALID_MTU;
++ }
++
++ *mtup = netdev_dev->mtu;
++ return 0;
++}
++
++static int
++netdev_bsd_get_ifindex(const struct netdev *netdev)
++{
++ int ifindex, error;
++
++ error = get_ifindex(netdev, &ifindex);
++ return error ? -error : ifindex;
++}
++
++static int
++netdev_bsd_get_carrier(const struct netdev *netdev_, bool *carrier)
++{
++ struct netdev_dev_bsd *netdev_dev =
++ netdev_dev_bsd_cast(netdev_get_dev(netdev_));
++
++ if (!(netdev_dev->cache_valid & VALID_CARRIER)) {
++ struct ifmediareq ifmr;
++
++ memset(&ifmr, 0, sizeof(ifmr));
++ strncpy(ifmr.ifm_name, netdev_get_name(netdev_), sizeof ifmr.ifm_name);
++
++ if (ioctl(af_inet_sock, SIOCGIFMEDIA, &ifmr) == -1) {
++ VLOG_DBG_RL(&rl, "%s: ioctl(SIOCGIFMEDIA) failed: %s",
++ netdev_get_name(netdev_), strerror(errno));
++ return errno;
++ }
++
++ netdev_dev->carrier = (ifmr.ifm_status & IFM_ACTIVE) == IFM_ACTIVE;
++ netdev_dev->cache_valid |= VALID_CARRIER;
++
++ /* If the interface doesn't report whether the media is active,
++ * just assume it is active. */
++ if ((ifmr.ifm_status & IFM_AVALID) == 0) {
++ netdev_dev->carrier = true;
++ }
++ }
++ *carrier = netdev_dev->carrier;
++
++ return 0;
++}
++
++/* Retrieves current device stats for 'netdev'. */
++static int
++netdev_bsd_get_stats(const struct netdev *netdev_, struct netdev_stats *stats)
++{
++ int if_count, i;
++ int mib[6];
++ size_t len;
++ struct ifmibdata ifmd;
++
++ COVERAGE_INC(netdev_get_stats);
++
++ mib[0] = CTL_NET;
++ mib[1] = PF_LINK;
++ mib[2] = NETLINK_GENERIC;
++ mib[3] = IFMIB_SYSTEM;
++ mib[4] = IFMIB_IFCOUNT;
++
++ len = sizeof(if_count);
++
++ if (sysctl(mib, 5, &if_count, &len, (void *)0, 0) == -1) {
++ VLOG_DBG_RL(&rl, "%s: sysctl failed: %s",
++ netdev_get_name(netdev_), strerror(errno));
++ return errno;
++ }
++
++ mib[5] = IFDATA_GENERAL;
++ mib[3] = IFMIB_IFDATA;
++ len = sizeof(ifmd);
++ for (i = 1; i <= if_count; i++) {
++ mib[4] = i; //row
++ if (sysctl(mib, 6, &ifmd, &len, (void *)0, 0) == -1) {
++ VLOG_DBG_RL(&rl, "%s: sysctl failed: %s",
++ netdev_get_name(netdev_), strerror(errno));
++ return errno;
++ } else if (!strcmp(ifmd.ifmd_name, netdev_get_name(netdev_))) {
++ stats->rx_packets = ifmd.ifmd_data.ifi_ipackets;
++ stats->tx_packets = ifmd.ifmd_data.ifi_opackets;
++ stats->rx_bytes = ifmd.ifmd_data.ifi_ibytes;
++ stats->tx_bytes = ifmd.ifmd_data.ifi_obytes;
++ stats->rx_errors = ifmd.ifmd_data.ifi_ierrors;
++ stats->tx_errors = ifmd.ifmd_data.ifi_oerrors;
++ stats->rx_dropped = ifmd.ifmd_data.ifi_iqdrops;
++ stats->tx_dropped = 0;
++ stats->multicast = ifmd.ifmd_data.ifi_imcasts;
++ stats->collisions = ifmd.ifmd_data.ifi_collisions;
++
++ stats->rx_length_errors = 0;
++ stats->rx_over_errors = 0;
++ stats->rx_crc_errors = 0;
++ stats->rx_frame_errors = 0;
++ stats->rx_fifo_errors = 0;
++ stats->rx_missed_errors = 0;
++
++ stats->tx_aborted_errors = 0;
++ stats->tx_carrier_errors = 0;
++ stats->tx_fifo_errors = 0;
++ stats->tx_heartbeat_errors = 0;
++ stats->tx_window_errors = 0;
++ break;
++ }
++ }
++
++ return 0;
++}
++
++static uint32_t
++netdev_bsd_parse_media(int media)
++{
++ uint32_t supported = 0;
++ bool half_duplex = media & IFM_HDX ? true : false;
++
++ switch (IFM_SUBTYPE(media)) {
++ case IFM_10_2:
++ case IFM_10_5:
++ case IFM_10_STP:
++ case IFM_10_T:
++ supported |= half_duplex ? OFPPF_10MB_HD : OFPPF_10MB_FD;
++ supported |= OFPPF_COPPER;
++ break;
++
++ case IFM_10_FL:
++ supported |= half_duplex ? OFPPF_10MB_HD : OFPPF_10MB_FD;
++ supported |= OFPPF_FIBER;
++ break;
++
++ case IFM_100_T2:
++ case IFM_100_T4:
++ case IFM_100_TX:
++ case IFM_100_VG:
++ supported |= half_duplex ? OFPPF_100MB_HD : OFPPF_100MB_FD;
++ supported |= OFPPF_COPPER;
++ break;
++
++ case IFM_100_FX:
++ supported |= half_duplex ? OFPPF_100MB_HD : OFPPF_100MB_FD;
++ supported |= OFPPF_FIBER;
++ break;
++
++ case IFM_1000_CX:
++ case IFM_1000_T:
++ supported |= half_duplex ? OFPPF_1GB_HD : OFPPF_1GB_FD;
++ supported |= OFPPF_COPPER;
++ break;
++
++ case IFM_1000_LX:
++ case IFM_1000_SX:
++ supported |= half_duplex ? OFPPF_1GB_HD : OFPPF_1GB_FD;
++ supported |= OFPPF_FIBER;
++ break;
++
++ case IFM_10G_CX4:
++ supported |= OFPPF_10GB_FD;
++ supported |= OFPPF_COPPER;
++ break;
++
++ case IFM_10G_LR:
++ case IFM_10G_SR:
++ supported |= OFPPF_10GB_FD;
++ supported |= OFPPF_FIBER;
++ break;
++
++ default:
++ return 0;
++ }
++
++ if (IFM_SUBTYPE(media) == IFM_AUTO) {
++ supported |= OFPPF_AUTONEG;
++ }
++ /*
++ if (media & IFM_ETH_FMASK) {
++ supported |= OFPPF_PAUSE;
++ }
++ */
++
++ return supported;
++}
++
++/*
++ * Stores the features supported by 'netdev' into each of '*current',
++ * '*advertised', '*supported', and '*peer' that are non-null. Each value is a
++ * bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if
++ * successful, otherwise a positive errno value. On failure, all of the
++ * passed-in values are set to 0.
++ */
++static int
++netdev_bsd_get_features(struct netdev *netdev,
++ uint32_t *current, uint32_t *advertised,
++ uint32_t *supported, uint32_t *peer)
++{
++ struct ifmediareq ifmr;
++ int *media_list;
++ int i;
++ int error;
++
++
++ /* XXX Look into SIOCGIFCAP instead of SIOCGIFMEDIA */
++
++ memset(&ifmr, 0, sizeof(ifmr));
++ strncpy(ifmr.ifm_name, netdev_get_name(netdev), sizeof ifmr.ifm_name);
++
++ /* We make two SIOCGIFMEDIA ioctl calls. The first to determine the
++ * number of supported modes, and a second with a buffer to retrieve
++ * them. */
++ if (ioctl(af_inet_sock, SIOCGIFMEDIA, &ifmr) == -1) {
++ VLOG_DBG_RL(&rl, "%s: ioctl(SIOCGIFMEDIA) failed: %s",
++ netdev_get_name(netdev), strerror(errno));
++ return errno;
++ }
++
++ media_list = xcalloc(ifmr.ifm_count, sizeof(int));
++ ifmr.ifm_ulist = media_list;
++
++ if (!IFM_TYPE(ifmr.ifm_current) & IFM_ETHER) {
++ VLOG_DBG_RL(&rl, "%s: doesn't appear to be ethernet",
++ netdev_get_name(netdev));
++ error = EINVAL;
++ goto cleanup;
++ }
++
++ if (ioctl(af_inet_sock, SIOCGIFMEDIA, &ifmr) == -1) {
++ VLOG_DBG_RL(&rl, "%s: ioctl(SIOCGIFMEDIA) failed: %s",
++ netdev_get_name(netdev), strerror(errno));
++ error = errno;
++ goto cleanup;
++ }
++
++ /* Current settings. */
++ *current = netdev_bsd_parse_media(ifmr.ifm_active);
++
++ /* Advertised features. */
++ *advertised = netdev_bsd_parse_media(ifmr.ifm_current);
++
++ /* Supported features. */
++ *supported = 0;
++ for (i = 0; i < ifmr.ifm_count; i++) {
++ *supported |= netdev_bsd_parse_media(ifmr.ifm_ulist[i]);
++ }
++
++ /* Peer advertisements. */
++ *peer = 0; /* XXX */
++
++ error = 0;
++cleanup:
++ free(media_list);
++ return error;
++}
++
++/*
++ * If 'netdev' has an assigned IPv4 address, sets '*in4' to that address (if
++ * 'in4' is non-null) and returns true. Otherwise, returns false.
++ */
++static int
++netdev_bsd_get_in4(const struct netdev *netdev_, struct in_addr *in4,
++ struct in_addr *netmask)
++{
++ struct netdev_dev_bsd *netdev_dev =
++ netdev_dev_bsd_cast(netdev_get_dev(netdev_));
++
++ if (!(netdev_dev->cache_valid & VALID_IN4)) {
++ const struct sockaddr_in *sin;
++ struct ifreq ifr;
++ int error;
++
++ ifr.ifr_addr.sa_family = AF_INET;
++ error = netdev_bsd_do_ioctl(netdev_, &ifr,
++ SIOCGIFADDR, "SIOCGIFADDR");
++ if (error) {
++ return error;
++ }
++
++ sin = (struct sockaddr_in *) &ifr.ifr_addr;
++ netdev_dev->in4 = sin->sin_addr;
++ netdev_dev->cache_valid |= VALID_IN4;
++ error = netdev_bsd_do_ioctl(netdev_, &ifr,
++ SIOCGIFNETMASK, "SIOCGIFNETMASK");
++ if (error) {
++ return error;
++ }
++ *netmask = ((struct sockaddr_in*)&ifr.ifr_addr)->sin_addr;
++ }
++ *in4 = netdev_dev->in4;
++
++ return in4->s_addr == INADDR_ANY ? EADDRNOTAVAIL : 0;
++}
++
++/*
++ * Assigns 'addr' as 'netdev''s IPv4 address and 'mask' as its netmask. If
++ * 'addr' is INADDR_ANY, 'netdev''s IPv4 address is cleared. Returns a
++ * positive errno value.
++ */
++static int
++netdev_bsd_set_in4(struct netdev *netdev_, struct in_addr addr,
++ struct in_addr mask)
++{
++ struct netdev_dev_bsd *netdev_dev =
++ netdev_dev_bsd_cast(netdev_get_dev(netdev_));
++ int error;
++
++ error = do_set_addr(netdev_, SIOCSIFADDR, "SIOCSIFADDR", addr);
++ if (!error) {
++ netdev_dev->cache_valid |= VALID_IN4;
++ netdev_dev->in4 = addr;
++ if (addr.s_addr != INADDR_ANY) {
++ error = do_set_addr(netdev_, SIOCSIFNETMASK,
++ "SIOCSIFNETMASK", mask);
++ }
++ }
++ return error;
++}
++
++static int
++netdev_bsd_get_in6(const struct netdev *netdev_, struct in6_addr *in6)
++{
++ struct netdev_dev_bsd *netdev_dev =
++ netdev_dev_bsd_cast(netdev_get_dev(netdev_));
++ if (!(netdev_dev->cache_valid & VALID_IN6)) {
++ struct ifaddrs *ifa, *head;
++ struct sockaddr_in6 *sin6;
++ const char *netdev_name = netdev_get_name(netdev_);
++
++ if (getifaddrs(&head) != 0) {
++ VLOG_ERR("getifaddrs on %s device failed: %s", netdev_name,
++ strerror(errno));
++ return errno;
++ }
++
++ for (ifa = head; ifa; ifa = ifa->ifa_next) {
++ if (ifa->ifa_addr->sa_family == AF_INET6 &&
++ !strcmp(ifa->ifa_name, netdev_name)) {
++ sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
++ if (sin6) {
++ memcpy(&netdev_dev->in6, &sin6->sin6_addr, sin6->sin6_len);
++ netdev_dev->cache_valid |= VALID_IN6;
++ *in6 = netdev_dev->in6;
++ freeifaddrs(head);
++ return 0;
++ }
++ }
++ }
++ return EADDRNOTAVAIL;
++ }
++ *in6 = netdev_dev->in6;
++ return 0;
++}
++
++static void
++make_in4_sockaddr(struct sockaddr *sa, struct in_addr addr)
++{
++ struct sockaddr_in sin;
++ memset(&sin, 0, sizeof sin);
++ sin.sin_family = AF_INET;
++ sin.sin_addr = addr;
++ sin.sin_port = 0;
++
++ memset(sa, 0, sizeof *sa);
++ memcpy(sa, &sin, sizeof sin);
++}
++
++static int
++do_set_addr(struct netdev *netdev,
++ int ioctl_nr, const char *ioctl_name, struct in_addr addr)
++{
++ struct ifreq ifr;
++ make_in4_sockaddr(&ifr.ifr_addr, addr);
++ return netdev_bsd_do_ioctl(netdev, &ifr, ioctl_nr, ioctl_name);
++}
++
++static int
++nd_to_iff_flags(enum netdev_flags nd)
++{
++ int iff = 0;
++ if (nd & NETDEV_UP) {
++ iff |= IFF_UP;
++ }
++ if (nd & NETDEV_PROMISC) {
++ iff |= IFF_PROMISC;
++ iff |= IFF_PPROMISC;
++ }
++ return iff;
++}
++
++static int
++iff_to_nd_flags(int iff)
++{
++ enum netdev_flags nd = 0;
++ if (iff & IFF_UP) {
++ nd |= NETDEV_UP;
++ }
++ if (iff & IFF_PROMISC) {
++ nd |= NETDEV_PROMISC;
++ }
++ return nd;
++}
++
++static int
++netdev_bsd_update_flags(struct netdev *netdev, enum netdev_flags off,
++ enum netdev_flags on, enum netdev_flags *old_flagsp)
++{
++ int old_flags, new_flags;
++ int error;
++
++ error = get_flags(netdev, &old_flags);
++ if (!error) {
++ *old_flagsp = iff_to_nd_flags(old_flags);
++ new_flags = (old_flags & ~nd_to_iff_flags(off)) | nd_to_iff_flags(on);
++ if (new_flags != old_flags) {
++ error = set_flags(netdev, new_flags);
++ }
++ }
++ return error;
++}
++
++/* Call callbacks for all the list of notifiers */
++static void
++poll_notify(struct list *dev_notifiers)
++{
++ struct netdev_bsd_notifier *notifier;
++ LIST_FOR_EACH (notifier, struct netdev_bsd_notifier, node, dev_notifiers) {
++ struct netdev_notifier *n = &notifier->notifier;
++ n->cb(n);
++ }
++}
++
++/*
++ * The callback registered for 'netdev_bsd_poll_notifier'.
++ *
++ * If 'change' is set it retrieves the element in the 'all_bsd_notifiers'
++ * relative to the network device which has been subject to the change, and
++ * then call the callbacks for all the notifiers registered for that network
++ * device.
++ */
++static void
++netdev_bsd_poll_cb(const struct rtbsd_change *change, void *aux)
++{
++ struct shash *arg = aux;
++
++ if (change) {
++ struct list *dev_notifiers = shash_find_data(arg, change->if_name);
++ if (dev_notifiers) {
++ poll_notify(dev_notifiers);
++ }
++ } else {
++ struct shash_node *node;
++ SHASH_FOR_EACH (node, arg) {
++ poll_notify(node->data);
++ }
++ }
++}
++
++/*
++ * Arranges for 'cb' to be called whenever one of the attributes of
++ * 'netdev' changes and sets '*notifierp' to a newly created
++ * netdev_notifier that represents this arrangement.
++ *
++ * If the 'all_bsd_notifiers' is empty, it registers the
++ * 'netdev_bsd_poll_notifier'. Than it creates a new notifier and inserts it
++ * into the list belonging to the node in the 'all_bsd_notifiers' relative to
++ * the network device. In case it is the first notifier registered for this
++ * network device, it first create the node into the 'all_bsd_notifiers' and
++ * then appends the notifier to its list.
++ */
++static int
++netdev_bsd_poll_add(struct netdev *netdev,
++ void (*cb)(struct netdev_notifier *), void *aux,
++ struct netdev_notifier **notifierp)
++{
++ const char *netdev_name = netdev_get_name(netdev);
++ struct netdev_bsd_notifier *notifier;
++ struct list *list;
++
++ if (shash_is_empty(&all_bsd_notifiers)) {
++ /* This is the first time that this function is called so the main
++ * notifier needs to be registered */
++ int error = rtbsd_notifier_register(&netdev_bsd_poll_notifier,
++ netdev_bsd_poll_cb, &all_bsd_notifiers);
++ if (error) {
++ return error;
++ }
++ }
++ list = shash_find_data(&all_bsd_notifiers, netdev_name);
++ if (!list) {
++ list = xmalloc(sizeof *list);
++ list_init(list);
++ shash_add(&all_bsd_notifiers, netdev_name, list);
++ }
++
++ notifier = xmalloc(sizeof *notifier);
++ netdev_notifier_init(&notifier->notifier, netdev, cb, aux);
++ list_push_back(list, &notifier->node);
++ *notifierp = &notifier->notifier;
++ return 0;
++}
++
++static void
++netdev_bsd_poll_remove(struct netdev_notifier *notifier_)
++{
++ struct netdev_bsd_notifier *notifier =
++ CONTAINER_OF(notifier_, struct netdev_bsd_notifier, notifier);
++ struct list *list;
++
++ /* Remove 'notifier' from its list. */
++ list = list_remove(&notifier->node);
++ if (list_is_empty(list)) {
++ /* The list is now empty. Remove it from the hash and free it. */
++ const char *netdev_name = netdev_get_name(notifier->notifier.netdev);
++ shash_delete(&all_bsd_notifiers,
++ shash_find(&all_bsd_notifiers, netdev_name));
++ free(list);
++ }
++ free(notifier);
++
++ /* If that was the last notifier, unregister. */
++ if (shash_is_empty(&all_bsd_notifiers)) {
++ rtbsd_notifier_unregister(&netdev_bsd_poll_notifier);
++ }
++}
++
++const struct netdev_class netdev_bsd_class = {
++ "system",
++
++ netdev_bsd_init,
++ netdev_bsd_run,
++ netdev_bsd_wait,
++ netdev_bsd_create_system,
++ netdev_bsd_destroy,
++ NULL, /* reconfigure */
++ netdev_bsd_open_system,
++ netdev_bsd_close,
++
++ netdev_bsd_enumerate,
++
++ netdev_bsd_recv,
++ netdev_bsd_recv_wait,
++ netdev_bsd_drain,
++
++ netdev_bsd_send,
++ netdev_bsd_send_wait,
++
++ netdev_bsd_set_etheraddr,
++ netdev_bsd_get_etheraddr,
++ netdev_bsd_get_mtu,
++ netdev_bsd_get_ifindex,
++ netdev_bsd_get_carrier,
++ netdev_bsd_get_stats,
++ NULL, /* set_stats */
++
++ netdev_bsd_get_features,
++ NULL, /* set_advertisement */
++ NULL, /* get_vlan_vid */ //XXX SIOCGETVLAN
++ NULL, /* set_policing */
++ NULL, /* get_qos_type */
++ NULL, /* get_qos_capabilities */
++ NULL, /* get_qos */
++ NULL, /* set_qos */
++ NULL, /* get_queue */
++ NULL, /* set_queue */
++ NULL, /* delete_queue */
++ NULL, /* get_queue_stats */
++ NULL, /* dump_queue */
++ NULL, /* dump_queue_stats */
++
++ netdev_bsd_get_in4,
++ netdev_bsd_set_in4,
++ netdev_bsd_get_in6,
++ NULL, /* add_router */
++ NULL, /* get_next_hop */
++ NULL, /* arp_lookup */
++
++ netdev_bsd_update_flags,
++
++ netdev_bsd_poll_add,
++ netdev_bsd_poll_remove,
++};
++
++const struct netdev_class netdev_tap_class = {
++ "tap",
++
++ netdev_bsd_init,
++ netdev_bsd_run,
++ netdev_bsd_wait,
++ netdev_bsd_create_tap,
++ netdev_bsd_destroy,
++ NULL, /* reconfigure */
++ netdev_bsd_open_system,
++ netdev_bsd_close,
++
++ netdev_bsd_enumerate,
++
++ netdev_bsd_recv,
++ netdev_bsd_recv_wait,
++ netdev_bsd_drain,
++
++ netdev_bsd_send,
++ netdev_bsd_send_wait,
++
++ netdev_bsd_set_etheraddr,
++ netdev_bsd_get_etheraddr,
++ netdev_bsd_get_mtu,
++ netdev_bsd_get_ifindex,
++ netdev_bsd_get_carrier,
++ netdev_bsd_get_stats,
++ NULL, /* set_stats */
++
++ netdev_bsd_get_features,
++ NULL, /* set_advertisement */
++ NULL, /* get_vlan_vid */
++ NULL, /* set_policing */
++ NULL, /* get_qos_type */
++ NULL, /* get_qos_capabilities */
++ NULL, /* get_qos */
++ NULL, /* set_qos */
++ NULL, /* get_queue */
++ NULL, /* set_queue */
++ NULL, /* delete_queue */
++ NULL, /* get_queue_stats */
++ NULL, /* dump_queue */
++ NULL, /* dump_queue_stats */
++
++ netdev_bsd_get_in4,
++ netdev_bsd_set_in4,
++ netdev_bsd_get_in6,
++ NULL, /* add_router */
++ NULL, /* get_next_hop */
++ NULL, /* arp_lookup */
++
++ netdev_bsd_update_flags,
++
++ netdev_bsd_poll_add,
++ netdev_bsd_poll_remove,
++};
++
++
++static void
++destroy_tap(int fd, const char *name)
++{
++ struct ifreq ifr;
++
++ close(fd);
++ strcpy(ifr.ifr_name, name);
++ /* XXX What to do if this call fails? */
++ ioctl(af_inet_sock, SIOCIFDESTROY, &ifr);
++}
++
++static int
++get_flags(const struct netdev *netdev, int *flags)
++{
++ struct ifreq ifr;
++ int error;
++
++ error = netdev_bsd_do_ioctl(netdev, &ifr, SIOCGIFFLAGS, "SIOCGIFFLAGS");
++
++ *flags = 0xFFFF0000 & (ifr.ifr_flagshigh << 16);
++ *flags |= 0x0000FFFF & ifr.ifr_flags;
++
++ return error;
++}
++
++static int
++set_flags(struct netdev *netdev, int flags)
++{
++ struct ifreq ifr;
++
++ ifr.ifr_flags = 0x0000FFFF & flags;
++ ifr.ifr_flagshigh = (0xFFFF0000 & flags) >> 16;
++
++ return netdev_bsd_do_ioctl(netdev, &ifr, SIOCSIFFLAGS, "SIOCSIFFLAGS");
++}
++
++static int
++get_ifindex(const struct netdev *netdev_, int *ifindexp)
++{
++ struct netdev_dev_bsd *netdev_dev =
++ netdev_dev_bsd_cast(netdev_get_dev(netdev_));
++ *ifindexp = 0;
++ if (!(netdev_dev->cache_valid & VALID_IFINDEX)) {
++ int ifindex = if_nametoindex(netdev_get_name(netdev_));
++ if (ifindex <= 0) {
++ return errno;
++ }
++ netdev_dev->cache_valid |= VALID_IFINDEX;
++ netdev_dev->ifindex = ifindex;
++ }
++ *ifindexp = netdev_dev->ifindex;
++ return 0;
++}
++
++static int
++get_etheraddr(const char *netdev_name, uint8_t ea[ETH_ADDR_LEN])
++{
++ struct ifaddrs *head;
++ struct ifaddrs *ifa;
++ struct sockaddr_dl *sdl;
++
++ if (getifaddrs(&head) != 0) {
++ VLOG_ERR("getifaddrs on %s device failed: %s", netdev_name,
++ strerror(errno));
++ return errno;
++ }
++
++ for (ifa = head; ifa; ifa = ifa->ifa_next) {
++ if (ifa->ifa_addr->sa_family == AF_LINK) {
++ if (!strcmp(ifa->ifa_name, netdev_name)) {
++ sdl = (struct sockaddr_dl *)ifa->ifa_addr;
++ if (sdl) {
++ memcpy(ea, LLADDR(sdl), sdl->sdl_alen);
++ freeifaddrs(head);
++ return 0;
++ }
++ }
++ }
++ }
++
++ VLOG_ERR("could not find ethernet address for %s device", netdev_name);
++ freeifaddrs(head);
++ return ENODEV;
++}
++
++static int
++set_etheraddr(const char *netdev_name, int hwaddr_family,
++ int hwaddr_len, const uint8_t mac[ETH_ADDR_LEN])
++{
++ struct ifreq ifr;
++
++ memset(&ifr, 0, sizeof ifr);
++ strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
++ ifr.ifr_addr.sa_family = hwaddr_family;
++ ifr.ifr_addr.sa_len = hwaddr_len;
++ memcpy(ifr.ifr_addr.sa_data, mac, hwaddr_len);
++ COVERAGE_INC(netdev_set_hwaddr);
++ if (ioctl(af_inet_sock, SIOCSIFLLADDR, &ifr) < 0) {
++ VLOG_ERR("ioctl(SIOCSIFLLADDR) on %s device failed: %s",
++ netdev_name, strerror(errno));
++ return errno;
++ }
++ return 0;
++}
++
++static int
++netdev_bsd_do_ioctl(const struct netdev *netdev, struct ifreq *ifr,
++ unsigned long cmd, const char *cmd_name)
++{
++ strncpy(ifr->ifr_name, netdev_get_name(netdev), sizeof ifr->ifr_name);
++ if (ioctl(af_inet_sock, cmd, ifr) == -1) {
++ VLOG_DBG_RL(&rl, "%s: ioctl(%s) failed: %s",
++ netdev_get_name(netdev), cmd_name, strerror(errno));
++ return errno;
++ }
++ return 0;
++}
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