/* * Copyright (c) 2011 Gaetano Catalli. * Copyright (c) 2013 YAMAMOTO Takashi. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include #include "netdev-provider.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef HAVE_NET_IF_MIB_H #include #endif #include #include #include #include #if defined(__NetBSD__) #include #endif #include "rtbsd.h" #include "coverage.h" #include "dynamic-string.h" #include "fatal-signal.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 "util.h" #include "vlog.h" VLOG_DEFINE_THIS_MODULE(netdev_bsd); struct netdev_rx_bsd { struct netdev_rx up; /* Packet capture descriptor for a system network device. * For a tap device this is NULL. */ pcap_t *pcap_handle; /* Selectable file descriptor for the network device. * This descriptor will be used for polling operations. */ int fd; }; static const struct netdev_rx_class netdev_rx_bsd_class; struct netdev_bsd { struct netdev up; unsigned int cache_valid; unsigned int change_seq; int ifindex; uint8_t etheraddr[ETH_ADDR_LEN]; struct in_addr in4; struct in6_addr in6; int mtu; int carrier; int tap_fd; /* TAP character device, if any, otherwise -1. */ /* Used for sending packets on non-tap devices. */ pcap_t *pcap; int fd; char *kernel_name; }; 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; #if defined(__NetBSD__) /* AF_LINK socket used for netdev_bsd_get_stats and set_etheraddr */ static int af_link_sock = -1; #endif /* defined(__NetBSD__) */ #define PCAP_SNAPLEN 2048 /* * 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 char *, 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(const char *, 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 ifr_get_flags(const struct ifreq *); static void ifr_set_flags(struct ifreq *, int flags); 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) { ovs_assert(is_netdev_bsd_class(netdev_get_class(netdev))); return CONTAINER_OF(netdev, struct netdev_bsd, up); } static struct netdev_rx_bsd * netdev_rx_bsd_cast(const struct netdev_rx *rx) { netdev_rx_assert_class(rx, &netdev_rx_bsd_class); return CONTAINER_OF(rx, struct netdev_rx_bsd, up); } static const char * netdev_get_kernel_name(const struct netdev *netdev) { return netdev_bsd_cast(netdev)->kernel_name; } /* 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", ovs_strerror(status)); return status; } #if defined(__NetBSD__) af_link_sock = socket(AF_LINK, SOCK_DGRAM, 0); status = af_link_sock >= 0 ? 0 : errno; if (status) { VLOG_ERR("failed to create link socket: %s", ovs_strerror(status)); close(af_inet_sock); af_inet_sock = -1; } #endif /* defined(__NetBSD__) */ 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(); } static void netdev_bsd_changed(struct netdev_bsd *dev) { dev->change_seq++; if (!dev->change_seq) { dev->change_seq++; } } /* 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_bsd *dev; if (change) { struct netdev *base_dev = netdev_from_name(change->if_name); if (base_dev) { const struct netdev_class *netdev_class = netdev_get_class(base_dev); if (is_netdev_bsd_class(netdev_class)) { dev = netdev_bsd_cast(base_dev); dev->cache_valid = 0; netdev_bsd_changed(dev); } } } 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_get_devices(&netdev_bsd_class, &device_shash); SHASH_FOR_EACH (node, &device_shash) { dev = node->data; dev->cache_valid = 0; netdev_bsd_changed(dev); } shash_destroy(&device_shash); } } static int cache_notifier_ref(void) { 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++; return 0; } static int cache_notifier_unref(void) { cache_notifier_refcount--; if (cache_notifier_refcount == 0) { rtbsd_notifier_unregister(&netdev_bsd_cache_notifier); } return 0; } /* Allocate a netdev_bsd structure */ static int netdev_bsd_create_system(const struct netdev_class *class, const char *name, struct netdev **netdevp) { struct netdev_bsd *netdev; enum netdev_flags flags; int error; error = cache_notifier_ref(); if (error) { return error; } netdev = xzalloc(sizeof *netdev); netdev->change_seq = 1; netdev_init(&netdev->up, name, class); netdev->tap_fd = -1; netdev->kernel_name = xstrdup(name); /* Verify that the netdev really exists by attempting to read its flags */ error = netdev_get_flags(&netdev->up, &flags); if (error == ENXIO) { netdev_uninit(&netdev->up, false); free(netdev); cache_notifier_unref(); return error; } *netdevp = &netdev->up; return 0; } /* * Allocate a netdev_bsd structure with 'tap' class. */ static int netdev_bsd_create_tap(const struct netdev_class *class, const char *name, struct netdev **netdevp) { struct netdev_bsd *netdev = NULL; int error = 0; struct ifreq ifr; char *kernel_name = NULL; error = cache_notifier_ref(); if (error) { goto error; } /* allocate the device structure and set the internal flag */ netdev = xzalloc(sizeof *netdev); 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->tap_fd = open("/dev/tap", O_RDWR); netdev->change_seq = 1; if (netdev->tap_fd < 0) { error = errno; VLOG_WARN("opening \"/dev/tap\" failed: %s", ovs_strerror(error)); goto error_undef_notifier; } /* Retrieve tap name (e.g. tap0) */ if (ioctl(netdev->tap_fd, TAPGIFNAME, &ifr) == -1) { /* XXX Need to destroy the device? */ error = errno; goto error_undef_notifier; } /* Change the name of the tap device */ #if defined(SIOCSIFNAME) ifr.ifr_data = (void *)name; if (ioctl(af_inet_sock, SIOCSIFNAME, &ifr) == -1) { error = errno; destroy_tap(netdev->tap_fd, ifr.ifr_name); goto error_undef_notifier; } kernel_name = xstrdup(name); #else /* * NetBSD doesn't support inteface renaming. */ VLOG_INFO("tap %s is created for bridge %s", ifr.ifr_name, name); kernel_name = xstrdup(ifr.ifr_name); #endif /* set non-blocking. */ error = set_nonblocking(netdev->tap_fd); if (error) { destroy_tap(netdev->tap_fd, kernel_name); goto error_undef_notifier; } /* Turn device UP */ ifr_set_flags(&ifr, IFF_UP); strncpy(ifr.ifr_name, kernel_name, sizeof ifr.ifr_name); if (ioctl(af_inet_sock, SIOCSIFFLAGS, &ifr) == -1) { error = errno; destroy_tap(netdev->tap_fd, kernel_name); goto error_undef_notifier; } /* initialize the device structure and * link the structure to its netdev */ netdev_init(&netdev->up, name, class); netdev->kernel_name = kernel_name; *netdevp = &netdev->up; return 0; error_undef_notifier: cache_notifier_unref(); error: free(netdev); free(kernel_name); return error; } static void netdev_bsd_destroy(struct netdev *netdev_) { struct netdev_bsd *netdev = netdev_bsd_cast(netdev_); cache_notifier_unref(); if (netdev->tap_fd >= 0) { destroy_tap(netdev->tap_fd, netdev_get_kernel_name(netdev_)); } if (netdev->pcap) { pcap_close(netdev->pcap); } free(netdev->kernel_name); free(netdev); } static int netdev_bsd_open_pcap(const char *name, pcap_t **pcapp, int *fdp) { char errbuf[PCAP_ERRBUF_SIZE]; pcap_t *pcap = NULL; int one = 1; int error; int fd; /* Open the pcap device. The device is opened in non-promiscuous mode * because the interface flags are manually set by the caller. */ errbuf[0] = '\0'; pcap = pcap_open_live(name, PCAP_SNAPLEN, 0, 1000, errbuf); if (!pcap) { VLOG_ERR_RL(&rl, "%s: pcap_open_live failed: %s", name, errbuf); error = EIO; goto error; } if (errbuf[0] != '\0') { VLOG_WARN_RL(&rl, "%s: pcap_open_live: %s", name, errbuf); } /* Get the underlying fd. */ fd = pcap_get_selectable_fd(pcap); if (fd == -1) { VLOG_WARN_RL(&rl, "%s: no selectable file descriptor", name); 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(pcap, 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(fd, BIOCIMMEDIATE, &one) < 0 ) { VLOG_ERR_RL(&rl, "ioctl(BIOCIMMEDIATE) on %s device failed: %s", name, ovs_strerror(errno)); error = errno; goto error; } /* Capture only incoming packets. */ error = pcap_setdirection(pcap, PCAP_D_IN); if (error == -1) { error = errno; goto error; } *pcapp = pcap; *fdp = fd; return 0; error: if (pcap) { pcap_close(pcap); } *pcapp = NULL; *fdp = -1; return error; } static int netdev_bsd_rx_open(struct netdev *netdev_, struct netdev_rx **rxp) { struct netdev_bsd *netdev = netdev_bsd_cast(netdev_); struct netdev_rx_bsd *rx; pcap_t *pcap; int fd; if (!strcmp(netdev_get_type(netdev_), "tap")) { pcap = NULL; fd = netdev->tap_fd; } else { int error = netdev_bsd_open_pcap(netdev_get_kernel_name(netdev_), &pcap, &fd); if (error) { return error; } netdev_bsd_changed(netdev); } rx = xmalloc(sizeof *rx); netdev_rx_init(&rx->up, netdev_, &netdev_rx_bsd_class); rx->pcap_handle = pcap; rx->fd = fd; *rxp = &rx->up; return 0; } static void netdev_rx_bsd_destroy(struct netdev_rx *rx_) { struct netdev_rx_bsd *rx = netdev_rx_bsd_cast(rx_); if (rx->pcap_handle) { pcap_close(rx->pcap_handle); } free(rx); } /* 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) { VLOG_WARN_RL(&rl, "packet truncated"); 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 * from rx->pcap. */ static int netdev_rx_bsd_recv_pcap(struct netdev_rx_bsd *rx, void *data, size_t size) { struct pcap_arg arg; int ret; /* prepare the pcap argument to store the packet */ arg.size = size; arg.data = data; for (;;) { ret = pcap_dispatch(rx->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 * 'rx->fd' is initialized with the tap file descriptor. */ static int netdev_rx_bsd_recv_tap(struct netdev_rx_bsd *rx, void *data, size_t size) { for (;;) { ssize_t retval = read(rx->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", ovs_strerror(errno), netdev_rx_get_name(&rx->up)); } return -errno; } } } static int netdev_rx_bsd_recv(struct netdev_rx *rx_, void *data, size_t size) { struct netdev_rx_bsd *rx = netdev_rx_bsd_cast(rx_); return (rx->pcap_handle ? netdev_rx_bsd_recv_pcap(rx, data, size) : netdev_rx_bsd_recv_tap(rx, 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_rx_recv() on 'rx'. */ static void netdev_rx_bsd_wait(struct netdev_rx *rx_) { struct netdev_rx_bsd *rx = netdev_rx_bsd_cast(rx_); poll_fd_wait(rx->fd, POLLIN); } /* Discards all packets waiting to be received from 'rx'. */ static int netdev_rx_bsd_drain(struct netdev_rx *rx_) { struct ifreq ifr; struct netdev_rx_bsd *rx = netdev_rx_bsd_cast(rx_); strcpy(ifr.ifr_name, netdev_get_kernel_name(netdev_rx_get_netdev(rx_))); if (ioctl(rx->fd, BIOCFLUSH, &ifr) == -1) { VLOG_DBG_RL(&rl, "%s: ioctl(BIOCFLUSH) failed: %s", netdev_rx_get_name(rx_), ovs_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 *dev = netdev_bsd_cast(netdev_); const char *name = netdev_get_name(netdev_); if (dev->tap_fd < 0 && !dev->pcap) { int error = netdev_bsd_open_pcap(name, &dev->pcap, &dev->fd); if (error) { return error; } } for (;;) { ssize_t retval; if (dev->tap_fd >= 0) { retval = write(dev->tap_fd, data, size); } else { retval = pcap_inject(dev->pcap, data, size); } if (retval < 0) { if (errno == EINTR) { continue; } else if (errno != EAGAIN) { VLOG_WARN_RL(&rl, "error sending Ethernet packet on %s: %s", name, ovs_strerror(errno)); } return errno; } else if (retval != size) { VLOG_WARN_RL(&rl, "sent partial Ethernet packet (%zd bytes of " "%zu) on %s", retval, size, name); 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 *dev = netdev_bsd_cast(netdev_); if (dev->tap_fd >= 0) { /* TAP device always accepts packets. */ poll_immediate_wake(); } else if (dev->pcap) { poll_fd_wait(dev->fd, POLLOUT); } else { /* We haven't even tried to send a packet yet. */ 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_bsd *netdev = netdev_bsd_cast(netdev_); int error; if (!(netdev->cache_valid & VALID_ETHERADDR) || !eth_addr_equals(netdev->etheraddr, mac)) { error = set_etheraddr(netdev_get_kernel_name(netdev_), AF_LINK, ETH_ADDR_LEN, mac); if (!error) { netdev->cache_valid |= VALID_ETHERADDR; memcpy(netdev->etheraddr, mac, ETH_ADDR_LEN); netdev_bsd_changed(netdev); } } 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_bsd *netdev = netdev_bsd_cast(netdev_); if (!(netdev->cache_valid & VALID_ETHERADDR)) { int error = get_etheraddr(netdev_get_kernel_name(netdev_), netdev->etheraddr); if (error) { return error; } netdev->cache_valid |= VALID_ETHERADDR; } memcpy(mac, netdev->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_bsd *netdev = netdev_bsd_cast(netdev_); if (!(netdev->cache_valid & VALID_MTU)) { struct ifreq ifr; int error; error = netdev_bsd_do_ioctl(netdev_get_kernel_name(netdev_), &ifr, SIOCGIFMTU, "SIOCGIFMTU"); if (error) { return error; } netdev->mtu = ifr.ifr_mtu; netdev->cache_valid |= VALID_MTU; } *mtup = netdev->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_bsd *netdev = netdev_bsd_cast(netdev_); if (!(netdev->cache_valid & VALID_CARRIER)) { struct ifmediareq ifmr; memset(&ifmr, 0, sizeof(ifmr)); strncpy(ifmr.ifm_name, netdev_get_kernel_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_), ovs_strerror(errno)); return errno; } netdev->carrier = (ifmr.ifm_status & IFM_ACTIVE) == IFM_ACTIVE; netdev->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->carrier = true; } } *carrier = netdev->carrier; return 0; } static void convert_stats(struct netdev_stats *stats, const struct if_data *ifd) { /* * note: UINT64_MAX means unsupported */ stats->rx_packets = ifd->ifi_ipackets; stats->tx_packets = ifd->ifi_opackets; stats->rx_bytes = ifd->ifi_obytes; stats->tx_bytes = ifd->ifi_ibytes; stats->rx_errors = ifd->ifi_ierrors; stats->tx_errors = ifd->ifi_oerrors; stats->rx_dropped = ifd->ifi_iqdrops; stats->tx_dropped = UINT64_MAX; stats->multicast = ifd->ifi_imcasts; stats->collisions = ifd->ifi_collisions; stats->rx_length_errors = UINT64_MAX; stats->rx_over_errors = UINT64_MAX; stats->rx_crc_errors = UINT64_MAX; stats->rx_frame_errors = UINT64_MAX; stats->rx_fifo_errors = UINT64_MAX; stats->rx_missed_errors = UINT64_MAX; stats->tx_aborted_errors = UINT64_MAX; stats->tx_carrier_errors = UINT64_MAX; stats->tx_fifo_errors = UINT64_MAX; stats->tx_heartbeat_errors = UINT64_MAX; stats->tx_window_errors = UINT64_MAX; } /* Retrieves current device stats for 'netdev'. */ static int netdev_bsd_get_stats(const struct netdev *netdev_, struct netdev_stats *stats) { #if defined(__FreeBSD__) int if_count, i; int mib[6]; size_t len; struct ifmibdata ifmd; 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_), ovs_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_), ovs_strerror(errno)); return errno; } else if (!strcmp(ifmd.ifmd_name, netdev_get_name(netdev_))) { convert_stats(stats, &ifmd.ifmd_data); break; } } return 0; #elif defined(__NetBSD__) struct ifdatareq ifdr; int saved_errno; int ret; memset(&ifdr, 0, sizeof(ifdr)); strncpy(ifdr.ifdr_name, netdev_get_kernel_name(netdev_), sizeof(ifdr.ifdr_name)); ret = ioctl(af_link_sock, SIOCGIFDATA, &ifdr); saved_errno = errno; if (ret == -1) { return saved_errno; } convert_stats(stats, &ifdr.ifdr_data); return 0; #else #error not implemented #endif } 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 ? NETDEV_F_10MB_HD : NETDEV_F_10MB_FD; supported |= NETDEV_F_COPPER; break; case IFM_10_FL: supported |= half_duplex ? NETDEV_F_10MB_HD : NETDEV_F_10MB_FD; supported |= NETDEV_F_FIBER; break; case IFM_100_T2: case IFM_100_T4: case IFM_100_TX: case IFM_100_VG: supported |= half_duplex ? NETDEV_F_100MB_HD : NETDEV_F_100MB_FD; supported |= NETDEV_F_COPPER; break; case IFM_100_FX: supported |= half_duplex ? NETDEV_F_100MB_HD : NETDEV_F_100MB_FD; supported |= NETDEV_F_FIBER; break; case IFM_1000_CX: case IFM_1000_T: supported |= half_duplex ? NETDEV_F_1GB_HD : NETDEV_F_1GB_FD; supported |= NETDEV_F_COPPER; break; case IFM_1000_LX: case IFM_1000_SX: supported |= half_duplex ? NETDEV_F_1GB_HD : NETDEV_F_1GB_FD; supported |= NETDEV_F_FIBER; break; case IFM_10G_CX4: supported |= NETDEV_F_10GB_FD; supported |= NETDEV_F_COPPER; break; case IFM_10G_LR: case IFM_10G_SR: supported |= NETDEV_F_10GB_FD; supported |= NETDEV_F_FIBER; break; default: return 0; } if (IFM_SUBTYPE(media) == IFM_AUTO) { supported |= NETDEV_F_AUTONEG; } /* if (media & IFM_ETH_FMASK) { supported |= NETDEV_F_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(const struct netdev *netdev, enum netdev_features *current, uint32_t *advertised, enum netdev_features *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), ovs_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), ovs_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_bsd *netdev = netdev_bsd_cast(netdev_); if (!(netdev->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_get_kernel_name(netdev_), &ifr, SIOCGIFADDR, "SIOCGIFADDR"); if (error) { return error; } sin = (struct sockaddr_in *) &ifr.ifr_addr; netdev->in4 = sin->sin_addr; netdev->cache_valid |= VALID_IN4; error = netdev_bsd_do_ioctl(netdev_get_kernel_name(netdev_), &ifr, SIOCGIFNETMASK, "SIOCGIFNETMASK"); if (error) { return error; } *netmask = ((struct sockaddr_in*)&ifr.ifr_addr)->sin_addr; } *in4 = netdev->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_bsd *netdev = netdev_bsd_cast(netdev_); int error; error = do_set_addr(netdev_, SIOCSIFADDR, "SIOCSIFADDR", addr); if (!error) { netdev->cache_valid |= VALID_IN4; netdev->in4 = addr; if (addr.s_addr != INADDR_ANY) { error = do_set_addr(netdev_, SIOCSIFNETMASK, "SIOCSIFNETMASK", mask); } netdev_bsd_changed(netdev); } return error; } static int netdev_bsd_get_in6(const struct netdev *netdev_, struct in6_addr *in6) { struct netdev_bsd *netdev = netdev_bsd_cast(netdev_); if (!(netdev->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, ovs_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->in6, &sin6->sin6_addr, sin6->sin6_len); netdev->cache_valid |= VALID_IN6; *in6 = netdev->in6; freeifaddrs(head); return 0; } } } return EADDRNOTAVAIL; } *in6 = netdev->in6; return 0; } #if defined(__NetBSD__) static struct netdev * find_netdev_by_kernel_name(const char *kernel_name) { struct shash device_shash; struct shash_node *node; shash_init(&device_shash); netdev_get_devices(&netdev_tap_class, &device_shash); SHASH_FOR_EACH(node, &device_shash) { struct netdev_bsd * const dev = node->data; if (!strcmp(dev->kernel_name, kernel_name)) { shash_destroy(&device_shash); return &dev->up; } } shash_destroy(&device_shash); return NULL; } static const char * netdev_bsd_convert_kernel_name_to_ovs_name(const char *kernel_name) { const struct netdev * const netdev = find_netdev_by_kernel_name(kernel_name); if (netdev == NULL) { return NULL; } return netdev_get_name(netdev); } #endif static int netdev_bsd_get_next_hop(const struct in_addr *host OVS_UNUSED, struct in_addr *next_hop OVS_UNUSED, char **netdev_name OVS_UNUSED) { #if defined(__NetBSD__) static int seq = 0; struct sockaddr_in sin; struct sockaddr_dl sdl; int s; int i; struct { struct rt_msghdr h; char space[512]; } buf; struct rt_msghdr *rtm = &buf.h; const pid_t pid = getpid(); char *cp; ssize_t ssz; bool gateway = false; char *ifname = NULL; int saved_errno; memset(next_hop, 0, sizeof(*next_hop)); *netdev_name = NULL; memset(&sin, 0, sizeof(sin)); sin.sin_len = sizeof(sin); sin.sin_family = AF_INET; sin.sin_port = 0; sin.sin_addr = *host; memset(&sdl, 0, sizeof(sdl)); sdl.sdl_len = sizeof(sdl); sdl.sdl_family = AF_LINK; s = socket(PF_ROUTE, SOCK_RAW, 0); memset(&buf, 0, sizeof(buf)); rtm->rtm_flags = RTF_HOST|RTF_UP; rtm->rtm_version = RTM_VERSION; rtm->rtm_addrs = RTA_DST|RTA_IFP; cp = (void *)&buf.space; memcpy(cp, &sin, sizeof(sin)); RT_ADVANCE(cp, (struct sockaddr *)(void *)&sin); memcpy(cp, &sdl, sizeof(sdl)); RT_ADVANCE(cp, (struct sockaddr *)(void *)&sdl); rtm->rtm_msglen = cp - (char *)(void *)rtm; rtm->rtm_seq = ++seq; rtm->rtm_type = RTM_GET; rtm->rtm_pid = pid; write(s, rtm, rtm->rtm_msglen); memset(&buf, 0, sizeof(buf)); do { ssz = read(s, &buf, sizeof(buf)); } while (ssz > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid)); saved_errno = errno; close(s); if (ssz <= 0) { if (ssz < 0) { return saved_errno; } return EPIPE; /* XXX */ } cp = (void *)&buf.space; for (i = 1; i; i <<= 1) { if ((rtm->rtm_addrs & i) != 0) { const struct sockaddr *sa = (const void *)cp; if ((i == RTA_GATEWAY) && sa->sa_family == AF_INET) { const struct sockaddr_in * const sin = (const struct sockaddr_in *)sa; *next_hop = sin->sin_addr; gateway = true; } if ((i == RTA_IFP) && sa->sa_family == AF_LINK) { const struct sockaddr_dl * const sdl = (const struct sockaddr_dl *)sa; const size_t nlen = sdl->sdl_nlen; char * const kernel_name = xmalloc(nlen + 1); const char *name; memcpy(kernel_name, sdl->sdl_data, nlen); kernel_name[nlen] = 0; name = netdev_bsd_convert_kernel_name_to_ovs_name(kernel_name); if (name == NULL) { ifname = xstrdup(kernel_name); } else { ifname = xstrdup(name); } free(kernel_name); } RT_ADVANCE(cp, sa); } } if (ifname == NULL) { return ENXIO; } if (!gateway) { *next_hop = *host; } *netdev_name = ifname; VLOG_DBG("host " IP_FMT " next-hop " IP_FMT " if %s", IP_ARGS(host->s_addr), IP_ARGS(next_hop->s_addr), *netdev_name); return 0; #else return EOPNOTSUPP; #endif } 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_get_kernel_name(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; #if defined(IFF_PPROMISC) iff |= IFF_PPROMISC; #endif } 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) { struct netdev_bsd *netdev = netdev_bsd_cast(netdev_); 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_get_kernel_name(netdev_), new_flags); netdev_bsd_changed(netdev); } } return error; } static unsigned int netdev_bsd_change_seq(const struct netdev *netdev) { return netdev_bsd_cast(netdev)->change_seq; } 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, /* get_config */ NULL, /* set_config */ NULL, /* get_tunnel_config */ netdev_bsd_rx_open, netdev_bsd_send, netdev_bsd_send_wait, netdev_bsd_set_etheraddr, netdev_bsd_get_etheraddr, netdev_bsd_get_mtu, NULL, /* set_mtu */ netdev_bsd_get_ifindex, netdev_bsd_get_carrier, NULL, /* get_carrier_resets */ NULL, /* set_miimon_interval */ netdev_bsd_get_stats, NULL, /* set_stats */ netdev_bsd_get_features, NULL, /* set_advertisement */ 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 */ netdev_bsd_get_next_hop, NULL, /* get_status */ NULL, /* arp_lookup */ netdev_bsd_update_flags, netdev_bsd_change_seq }; 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, /* get_config */ NULL, /* set_config */ NULL, /* get_tunnel_config */ netdev_bsd_rx_open, netdev_bsd_send, netdev_bsd_send_wait, netdev_bsd_set_etheraddr, netdev_bsd_get_etheraddr, netdev_bsd_get_mtu, NULL, /* set_mtu */ netdev_bsd_get_ifindex, netdev_bsd_get_carrier, NULL, /* get_carrier_resets */ NULL, /* set_miimon_interval */ netdev_bsd_get_stats, NULL, /* set_stats */ netdev_bsd_get_features, NULL, /* set_advertisement */ 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 */ netdev_bsd_get_next_hop, NULL, /* get_status */ NULL, /* arp_lookup */ netdev_bsd_update_flags, netdev_bsd_change_seq }; static const struct netdev_rx_class netdev_rx_bsd_class = { netdev_rx_bsd_destroy, netdev_rx_bsd_recv, netdev_rx_bsd_wait, netdev_rx_bsd_drain, }; 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_get_kernel_name(netdev), &ifr, SIOCGIFFLAGS, "SIOCGIFFLAGS"); *flags = ifr_get_flags(&ifr); return error; } static int set_flags(const char *name, int flags) { struct ifreq ifr; ifr_set_flags(&ifr, flags); return netdev_bsd_do_ioctl(name, &ifr, SIOCSIFFLAGS, "SIOCSIFFLAGS"); } static int get_ifindex(const struct netdev *netdev_, int *ifindexp) { struct netdev_bsd *netdev = netdev_bsd_cast(netdev_); *ifindexp = 0; if (!(netdev->cache_valid & VALID_IFINDEX)) { int ifindex = if_nametoindex(netdev_get_name(netdev_)); if (ifindex <= 0) { return errno; } netdev->cache_valid |= VALID_IFINDEX; netdev->ifindex = ifindex; } *ifindexp = netdev->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, ovs_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 OVS_UNUSED, int hwaddr_family OVS_UNUSED, int hwaddr_len OVS_UNUSED, const uint8_t mac[ETH_ADDR_LEN] OVS_UNUSED) { #if defined(__FreeBSD__) 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); if (ioctl(af_inet_sock, SIOCSIFLLADDR, &ifr) < 0) { VLOG_ERR("ioctl(SIOCSIFLLADDR) on %s device failed: %s", netdev_name, ovs_strerror(errno)); return errno; } return 0; #elif defined(__NetBSD__) struct if_laddrreq req; struct sockaddr_dl *sdl; struct sockaddr_storage oldaddr; int ret; /* * get the old address, add new one, and then remove old one. */ if (hwaddr_len != ETH_ADDR_LEN) { /* just to be safe about sockaddr storage size */ return EOPNOTSUPP; } memset(&req, 0, sizeof(req)); strncpy(req.iflr_name, netdev_name, sizeof(req.iflr_name)); req.addr.ss_len = sizeof(req.addr); req.addr.ss_family = hwaddr_family; sdl = (struct sockaddr_dl *)&req.addr; sdl->sdl_alen = hwaddr_len; ret = ioctl(af_link_sock, SIOCGLIFADDR, &req); if (ret == -1) { return errno; } if (!memcmp(&sdl->sdl_data[sdl->sdl_nlen], mac, hwaddr_len)) { return 0; } oldaddr = req.addr; memset(&req, 0, sizeof(req)); strncpy(req.iflr_name, netdev_name, sizeof(req.iflr_name)); req.flags = IFLR_ACTIVE; sdl = (struct sockaddr_dl *)&req.addr; sdl->sdl_len = offsetof(struct sockaddr_dl, sdl_data) + hwaddr_len; sdl->sdl_alen = hwaddr_len; sdl->sdl_family = hwaddr_family; memcpy(sdl->sdl_data, mac, hwaddr_len); ret = ioctl(af_link_sock, SIOCALIFADDR, &req); if (ret == -1) { return errno; } memset(&req, 0, sizeof(req)); strncpy(req.iflr_name, netdev_name, sizeof(req.iflr_name)); req.addr = oldaddr; ret = ioctl(af_link_sock, SIOCDLIFADDR, &req); if (ret == -1) { return errno; } return 0; #else #error not implemented #endif } static int netdev_bsd_do_ioctl(const char *name, struct ifreq *ifr, unsigned long cmd, const char *cmd_name) { strncpy(ifr->ifr_name, name, sizeof ifr->ifr_name); if (ioctl(af_inet_sock, cmd, ifr) == -1) { VLOG_DBG_RL(&rl, "%s: ioctl(%s) failed: %s", name, cmd_name, ovs_strerror(errno)); return errno; } return 0; } static int ifr_get_flags(const struct ifreq *ifr) { #ifdef HAVE_STRUCT_IFREQ_IFR_FLAGSHIGH return (ifr->ifr_flagshigh << 16) | ifr->ifr_flags; #else return ifr->ifr_flags; #endif } static void ifr_set_flags(struct ifreq *ifr, int flags) { ifr->ifr_flags = flags; #ifdef HAVE_STRUCT_IFREQ_IFR_FLAGSHIGH ifr->ifr_flagshigh = flags >> 16; #endif }