lib/netdev.h

   1 /*
   2  * Copyright (c) 2008, 2009, 2010 Nicira Networks.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef NETDEV_H
  18 #define NETDEV_H 1
  19
  20 #include <stdbool.h>
  21 #include <stddef.h>
  22 #include <stdint.h>
  23
  24 #ifdef  __cplusplus
  25 extern "C" {
  26 #endif
  27
  28 /* Generic interface to network devices.
  29  *
  30  * Currently, there is a single implementation of this interface that supports
  31  * Linux.  The interface should be generic enough to be implementable on other
  32  * operating systems as well. */
  33
  34 struct ofpbuf;
  35 struct in_addr;
  36 struct in6_addr;
  37 struct shash;
  38 struct svec;
  39
  40 enum netdev_flags {
  41     NETDEV_UP = 0x0001,         /* Device enabled? */
  42     NETDEV_PROMISC = 0x0002,    /* Promiscuous mode? */
  43     NETDEV_LOOPBACK = 0x0004    /* This is a loopback device. */
  44 };
  45
  46 enum netdev_pseudo_ethertype {
  47     NETDEV_ETH_TYPE_NONE = -128, /* Receive no frames. */
  48     NETDEV_ETH_TYPE_ANY,         /* Receive all frames. */
  49     NETDEV_ETH_TYPE_802_2        /* Receive all IEEE 802.2 frames. */
  50 };
  51
  52 /* Network device statistics.
  53  *
  54  * Values of unsupported statistics are set to all-1-bits (UINT64_MAX). */
  55 struct netdev_stats {
  56     uint64_t rx_packets;        /* Total packets received. */
  57     uint64_t tx_packets;        /* Total packets transmitted. */
  58     uint64_t rx_bytes;          /* Total bytes received. */
  59     uint64_t tx_bytes;          /* Total bytes transmitted. */
  60     uint64_t rx_errors;         /* Bad packets received. */
  61     uint64_t tx_errors;         /* Packet transmit problems. */
  62     uint64_t rx_dropped;        /* No buffer space. */
  63     uint64_t tx_dropped;        /* No buffer space. */
  64     uint64_t multicast;         /* Multicast packets received. */
  65     uint64_t collisions;
  66
  67     /* Detailed receive errors. */
  68     uint64_t rx_length_errors;
  69     uint64_t rx_over_errors;    /* Receiver ring buff overflow. */
  70     uint64_t rx_crc_errors;     /* Recved pkt with crc error. */
  71     uint64_t rx_frame_errors;   /* Recv'd frame alignment error. */
  72     uint64_t rx_fifo_errors;    /* Recv'r fifo overrun . */
  73     uint64_t rx_missed_errors;  /* Receiver missed packet. */
  74
  75     /* Detailed transmit errors. */
  76     uint64_t tx_aborted_errors;
  77     uint64_t tx_carrier_errors;
  78     uint64_t tx_fifo_errors;
  79     uint64_t tx_heartbeat_errors;
  80     uint64_t tx_window_errors;
  81 };
  82
  83 struct netdev_options {
  84     const char *name;
  85     const char *type;
  86     const struct shash *args;
  87     int ethertype;
  88     bool may_create;
  89     bool may_open;
  90 };
  91
  92 struct netdev;
  93 struct netdev_class;
  94
  95 void netdev_run(void);
  96 void netdev_wait(void);
  97
  98 int netdev_register_provider(const struct netdev_class *);
  99 int netdev_unregister_provider(const char *type);
 100 void netdev_enumerate_types(struct svec *types);
 101
 102 int netdev_open(struct netdev_options *, struct netdev **);
 103 int netdev_open_default(const char *name, struct netdev **);
 104 int netdev_reconfigure(struct netdev *, const struct shash *args);
 105 void netdev_close(struct netdev *);
 106
 107 bool netdev_exists(const char *name);
 108
 109 int netdev_enumerate(struct svec *);
 110
 111 const char *netdev_get_name(const struct netdev *);
 112 const char *netdev_get_type(const struct netdev *);
 113 int netdev_get_mtu(const struct netdev *, int *mtup);
 114 int netdev_get_ifindex(const struct netdev *);
 115
 116 int netdev_recv(struct netdev *, struct ofpbuf *);
 117 void netdev_recv_wait(struct netdev *);
 118 int netdev_drain(struct netdev *);
 119
 120 int netdev_send(struct netdev *, const struct ofpbuf *);
 121 void netdev_send_wait(struct netdev *);
 122
 123 int netdev_set_etheraddr(struct netdev *, const uint8_t mac[6]);
 124 int netdev_get_etheraddr(const struct netdev *, uint8_t mac[6]);
 125
 126 int netdev_get_carrier(const struct netdev *, bool *carrier);
 127 int netdev_get_features(struct netdev *,
 128                         uint32_t *current, uint32_t *advertised,
 129                         uint32_t *supported, uint32_t *peer);
 130 uint64_t netdev_features_to_bps(uint32_t features);
 131 bool netdev_features_is_full_duplex(uint32_t features);
 132 int netdev_set_advertisements(struct netdev *, uint32_t advertise);
 133
 134 int netdev_get_in4(const struct netdev *, struct in_addr *address,
 135                    struct in_addr *netmask);
 136 int netdev_set_in4(struct netdev *, struct in_addr addr, struct in_addr mask);
 137 int netdev_get_in6(const struct netdev *, struct in6_addr *);
 138 int netdev_add_router(struct netdev *, struct in_addr router);
 139 int netdev_get_next_hop(const struct netdev *, const struct in_addr *host,
 140                         struct in_addr *next_hop, char **);
 141 int netdev_arp_lookup(const struct netdev *, uint32_t ip, uint8_t mac[6]);
 142
 143 int netdev_get_flags(const struct netdev *, enum netdev_flags *);
 144 int netdev_set_flags(struct netdev *, enum netdev_flags, bool permanent);
 145 int netdev_turn_flags_on(struct netdev *, enum netdev_flags, bool permanent);
 146 int netdev_turn_flags_off(struct netdev *, enum netdev_flags, bool permanent);
 147
 148 int netdev_get_stats(const struct netdev *, struct netdev_stats *);
 149 int netdev_set_policing(struct netdev *, uint32_t kbits_rate,
 150                         uint32_t kbits_burst);
 151
 152 int netdev_get_vlan_vid(const struct netdev *, int *vlan_vid);
 153 struct netdev *netdev_find_dev_by_in4(const struct in_addr *);
 154
 155 struct netdev_monitor *netdev_monitor_create(void);
 156 void netdev_monitor_destroy(struct netdev_monitor *);
 157 int netdev_monitor_add(struct netdev_monitor *, struct netdev *);
 158 void netdev_monitor_remove(struct netdev_monitor *, struct netdev *);
 159 int netdev_monitor_poll(struct netdev_monitor *, char **devnamep);
 160 void netdev_monitor_poll_wait(const struct netdev_monitor *);
 161
 162 #ifdef  __cplusplus
 163 }
 164 #endif
 165
 166 #endif /* netdev.h */