ovs/lib/netdev.h

/*
 * Copyright (c) 2008, 2009, 2010 Nicira Networks.
 *
 * 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.
 */

#ifndef NETDEV_H
#define NETDEV_H 1

#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>

/* Generic interface to network devices.
 *
 * Currently, there is a single implementation of this interface that supports
 * Linux.  The interface should be generic enough to be implementable on other
 * operating systems as well. */

struct ofpbuf;
struct in_addr;
struct in6_addr;
struct shash;
struct svec;

enum netdev_flags {
    NETDEV_UP = 0x0001,         /* Device enabled? */
    NETDEV_PROMISC = 0x0002,    /* Promiscuous mode? */
    NETDEV_LOOPBACK = 0x0004    /* This is a loopback device. */
};

enum netdev_pseudo_ethertype {
    NETDEV_ETH_TYPE_NONE = -128, /* Receive no frames. */
    NETDEV_ETH_TYPE_ANY,         /* Receive all frames. */
    NETDEV_ETH_TYPE_802_2        /* Receive all IEEE 802.2 frames. */
};

/* Network device statistics.
 *
 * Values of unsupported statistics are set to all-1-bits (UINT64_MAX). */
struct netdev_stats {
    uint64_t rx_packets;        /* Total packets received. */
    uint64_t tx_packets;        /* Total packets transmitted. */
    uint64_t rx_bytes;          /* Total bytes received. */
    uint64_t tx_bytes;          /* Total bytes transmitted. */
    uint64_t rx_errors;         /* Bad packets received. */
    uint64_t tx_errors;         /* Packet transmit problems. */
    uint64_t rx_dropped;        /* No buffer space. */
    uint64_t tx_dropped;        /* No buffer space. */
    uint64_t multicast;         /* Multicast packets received. */
    uint64_t collisions;

    /* Detailed receive errors. */
    uint64_t rx_length_errors;
    uint64_t rx_over_errors;    /* Receiver ring buff overflow. */
    uint64_t rx_crc_errors;     /* Recved pkt with crc error. */
    uint64_t rx_frame_errors;   /* Recv'd frame alignment error. */
    uint64_t rx_fifo_errors;    /* Recv'r fifo overrun . */
    uint64_t rx_missed_errors;  /* Receiver missed packet. */

    /* Detailed transmit errors. */
    uint64_t tx_aborted_errors;
    uint64_t tx_carrier_errors;
    uint64_t tx_fifo_errors;
    uint64_t tx_heartbeat_errors;
    uint64_t tx_window_errors;
};

struct netdev_options {
    const char *name;
    const char *type;
    const struct shash *args;
    int ethertype;
    bool may_create;
    bool may_open;
};

struct netdev;

int netdev_initialize(void);
void netdev_run(void);
void netdev_wait(void);

int netdev_open(struct netdev_options *, struct netdev **);
int netdev_open_default(const char *name, struct netdev **);
int netdev_reconfigure(struct netdev *, const struct shash *args);
void netdev_close(struct netdev *);

bool netdev_exists(const char *name);

int netdev_enumerate(struct svec *);

const char *netdev_get_name(const struct netdev *);
const char *netdev_get_type(const struct netdev *);
int netdev_get_mtu(const struct netdev *, int *mtup);
int netdev_get_ifindex(const struct netdev *);

int netdev_recv(struct netdev *, struct ofpbuf *);
void netdev_recv_wait(struct netdev *);
int netdev_drain(struct netdev *);

int netdev_send(struct netdev *, const struct ofpbuf *);
void netdev_send_wait(struct netdev *);

int netdev_set_etheraddr(struct netdev *, const uint8_t mac[6]);
int netdev_get_etheraddr(const struct netdev *, uint8_t mac[6]);

int netdev_get_carrier(const struct netdev *, bool *carrier);
int netdev_get_features(struct netdev *,
                        uint32_t *current, uint32_t *advertised,
                        uint32_t *supported, uint32_t *peer);
int netdev_set_advertisements(struct netdev *, uint32_t advertise);

int netdev_get_in4(const struct netdev *, struct in_addr *address,
                   struct in_addr *netmask);
int netdev_set_in4(struct netdev *, struct in_addr addr, struct in_addr mask);
int netdev_get_in6(const struct netdev *, struct in6_addr *);
int netdev_add_router(struct netdev *, struct in_addr router);
int netdev_get_next_hop(const struct netdev *, const struct in_addr *host,
                        struct in_addr *next_hop, char **);
int netdev_arp_lookup(const struct netdev *, uint32_t ip, uint8_t mac[6]);

int netdev_get_flags(const struct netdev *, enum netdev_flags *);
int netdev_set_flags(struct netdev *, enum netdev_flags, bool permanent);
int netdev_turn_flags_on(struct netdev *, enum netdev_flags, bool permanent);
int netdev_turn_flags_off(struct netdev *, enum netdev_flags, bool permanent);

int netdev_get_stats(const struct netdev *, struct netdev_stats *);
int netdev_set_policing(struct netdev *, uint32_t kbits_rate, 
                        uint32_t kbits_burst);

int netdev_get_vlan_vid(const struct netdev *, int *vlan_vid);
struct netdev *netdev_find_dev_by_in4(const struct in_addr *);

struct netdev_monitor *netdev_monitor_create(void);
void netdev_monitor_destroy(struct netdev_monitor *);
int netdev_monitor_add(struct netdev_monitor *, struct netdev *);
void netdev_monitor_remove(struct netdev_monitor *, struct netdev *);
int netdev_monitor_poll(struct netdev_monitor *, char **devnamep);
void netdev_monitor_poll_wait(const struct netdev_monitor *);

#endif /* netdev.h */