/*
 * Copyright (c) 2015-2016 Cisco and/or its affiliates.
 * 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.
 */

option version = "2.0.0";

import "vnet/interface_types.api";
import "vnet/ip/ip_types.api";

enum bfd_state {
  BFD_STATE_API_ADMIN_DOWN = 0,
  BFD_STATE_API_DOWN = 1,
  BFD_STATE_API_INIT = 2,
  BFD_STATE_API_UP = 3,
};

/** \brief Set BFD echo source
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
    @param sw_if_index - interface to use as echo source
*/
autoreply define bfd_udp_set_echo_source
{
  u32 client_index;
  u32 context;
  vl_api_interface_index_t sw_if_index;
};

/** \brief Delete BFD echo source
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
*/
autoreply define bfd_udp_del_echo_source
{
  u32 client_index;
  u32 context;
};

/** \brief Get BFD echo source
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
*/
define bfd_udp_get_echo_source
{
  u32 client_index;
  u32 context;
};

/** \brief Get BFD echo source reply
    @param context - sender context, to match reply w/ request
    @param retval - return code
    @param sw_if_index - interface to use as echo source
    @param is_set - non-zero if set
    @param have_usable_ip4 - non-zero if have usable IPv4 address
    @param ip4_addr - IPv4 address
    @param have_usable_ip6 - non-zero if have usable IPv6 address
    @param ip6_addr - IPv6 address
*/
define bfd_udp_get_echo_source_reply
{
  u32 context;
  i32 retval;
  vl_api_interface_index_t sw_if_index;
  bool is_set;
  bool have_usable_ip4;
  vl_api_ip4_address_t ip4_addr;
  bool have_usable_ip6;
  vl_api_ip6_address_t ip6_addr;
};

/** \brief Add UDP BFD session on interface
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
    @param sw_if_index - sw index of the interface
    @param desired_min_tx - desired min transmit interval (microseconds)
    @param required_min_rx - required min receive interval (microseconds)
    @param local_addr - local address
    @param peer_addr - peer address
    @param is_ipv6 - local_addr, peer_addr are IPv6 if non-zero, otherwise IPv4
    @param detect_mult - detect multiplier (# of packets missed before connection goes down)
    @param is_authenticated - non-zero if authentication is required
    @param bfd_key_id - key id sent out in BFD packets (if is_authenticated)
    @param conf_key_id - id of already configured key (if is_authenticated)
*/
autoreply define bfd_udp_add
{
  u32 client_index;
  u32 context;
  vl_api_interface_index_t sw_if_index;
  u32 desired_min_tx;
  u32 required_min_rx;
  vl_api_address_t local_addr;
  vl_api_address_t peer_addr;
  u8 detect_mult;
  bool is_authenticated;
  u8 bfd_key_id;
  u32 conf_key_id;
};
define bfd_udp_upd
{
  u32 client_index;
  u32 context;
  vl_api_interface_index_t sw_if_index;
  u32 desired_min_tx;
  u32 required_min_rx;
  vl_api_address_t local_addr;
  vl_api_address_t peer_addr;
  u8 detect_mult;
  bool is_authenticated;
  u8 bfd_key_id;
  u32 conf_key_id;
};
define bfd_udp_upd_reply
{
  u32 context;
  i32 retval;
  u32 stats_index;
};

/** \brief Modify UDP BFD session on interface
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
    @param sw_if_index - sw index of the interface
    @param desired_min_tx - desired min transmit interval (microseconds)
    @param required_min_rx - required min receive interval (microseconds)
    @param local_addr - local address
    @param peer_addr - peer address
    @param is_ipv6 - local_addr, peer_addr are IPv6 if non-zero, otherwise IPv4
    @param detect_mult - detect multiplier (# of packets missed before connection goes down)
*/
autoreply define bfd_udp_mod
{
  u32 client_index;
  u32 context;
  vl_api_interface_index_t sw_if_index;
  u32 desired_min_tx;
  u32 required_min_rx;
  vl_api_address_t local_addr;
  vl_api_address_t peer_addr;
  u8 detect_mult;
};

/** \brief Delete UDP BFD session on interface
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
    @param sw_if_index - sw index of the interface
    @param local_addr - local address
    @param peer_addr - peer address
    @param is_ipv6 - local_addr, peer_addr are IPv6 if non-zero, otherwise IPv4
*/
autoreply define bfd_udp_del
{
  u32 client_index;
  u32 context;
  vl_api_interface_index_t sw_if_index;
  vl_api_address_t local_addr;
  vl_api_address_t peer_addr;
};

/** \brief Get all BFD sessions
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
*/
define bfd_udp_session_dump
{
  u32 client_index;
  u32 context;
};

/** \brief BFD session details structure
    @param context - sender context, to match reply w/ request
    @param sw_if_index - sw index of the interface
    @param local_addr - local address
    @param peer_addr - peer address
    @param is_ipv6 - local_addr, peer_addr are IPv6 if non-zero, otherwise IPv4
    @param state - session state
    @param is_authenticated - non-zero if authentication in-use, zero otherwise
    @param bfd_key_id - ID of key currently in-use if auth is on
    @param conf_key_id - configured key ID for this session
    @param required_min_rx - required min receive interval (microseconds)
    @param desired_min_tx - desired min transmit interval (microseconds)
    @param detect_mult - detect multiplier (# of packets missed before connection goes down)
*/
define bfd_udp_session_details
{
  u32 context;
  vl_api_interface_index_t sw_if_index;
  vl_api_address_t local_addr;
  vl_api_address_t peer_addr;
  vl_api_bfd_state_t state;
  bool is_authenticated;
  u8 bfd_key_id;
  u32 conf_key_id;
  u32 required_min_rx;
  u32 desired_min_tx;
  u8 detect_mult;
};

/** \brief Set flags of BFD UDP session
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
    @param sw_if_index - sw index of the interface
    @param local_addr - local address
    @param peer_addr - peer address
    @param is_ipv6 - local_addr, peer_addr are IPv6 if non-zero, otherwise IPv4
    @param flags - set the admin state, 1 = up, 0 = down
*/
autoreply define bfd_udp_session_set_flags
{
  u32 client_index;
  u32 context;
  vl_api_interface_index_t sw_if_index;
  vl_api_address_t local_addr;
  vl_api_address_t peer_addr;
  vl_api_if_status_flags_t flags;
};

service {
  rpc want_bfd_events returns want_bfd_events_reply
    events bfd_udp_session_event;
};

/** \brief Register for BFD events
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
    @param enable_disable - 1 => register for events, 0 => cancel registration
    @param pid - sender's pid
*/
autoreply define want_bfd_events
{
  u32 client_index;
  u32 context;
  bool enable_disable;
  u32 pid;
};

define bfd_udp_session_event
{
  u32 client_index;
  u32 pid;
  vl_api_interface_index_t sw_if_index;
  vl_api_address_t local_addr;
  vl_api_address_t peer_addr;
  vl_api_bfd_state_t state;
  bool is_authenticated;
  u8 bfd_key_id;
  u32 conf_key_id;
  u32 required_min_rx;
  u32 desired_min_tx;
  u8 detect_mult;
};

/** \brief BFD UDP - add/replace key to configuration
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
    @param conf_key_id - key ID to add/replace/delete
    @param key_len - length of key (must be non-zero)
    @param auth_type - authentication type (RFC 5880/4.1/Auth Type)
    @param key - key data
*/
autoreply define bfd_auth_set_key
{
  u32 client_index;
  u32 context;
  u32 conf_key_id;
  u8 key_len;
  u8 auth_type;
  u8 key[20];
};

/** \brief BFD UDP - delete key from configuration
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
    @param conf_key_id - key ID to add/replace/delete
    @param key_len - length of key (must be non-zero)
    @param key - key data
*/
autoreply define bfd_auth_del_key
{
  u32 client_index;
  u32 context;
  u32 conf_key_id;
};

/** \brief Get a list of configured authentication keys
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
*/
define bfd_auth_keys_dump
{
  u32 client_index;
  u32 context;
};

/** \brief BFD authentication key details
    @param context - sender context, to match reply w/ request
    @param conf_key_id - configured key ID
    @param use_count - how many BFD sessions currently use this key
    @param auth_type - authentication type (RFC 5880/4.1/Auth Type)
*/
define bfd_auth_keys_details
{
  u32 context;
  u32 conf_key_id;
  u32 use_count;
  u8 auth_type;
};

/** \brief BFD UDP - activate/change authentication
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
    @param sw_if_index - sw index of the interface
    @param local_addr - local address
    @param peer_addr - peer address
    @param is_ipv6 - local_addr, peer_addr are IPv6 if non-zero, otherwise IPv4
    @param is_delayed - change is applied once peer applies the change (on first received packet with this auth)
    @param bfd_key_id - key id sent out in BFD packets
    @param conf_key_id - id of already configured key
*/
autoreply define bfd_udp_auth_activate
{
  u32 client_index;
  u32 context;
  vl_api_interface_index_t sw_if_index;
  vl_api_address_t local_addr;
  vl_api_address_t peer_addr;
  bool is_delayed;
  u8 bfd_key_id;
  u32 conf_key_id;
};

/** \brief BFD UDP - deactivate authentication
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
    @param sw_if_index - sw index of the interface
    @param local_addr - local address
    @param peer_addr - peer address
    @param is_ipv6 - local_addr, peer_addr are IPv6 if non-zero, otherwise IPv4
    @param is_delayed - change is applied once peer applies the change (on first received non-authenticated packet)
*/
autoreply define bfd_udp_auth_deactivate
{
  u32 client_index;
  u32 context;
  vl_api_interface_index_t sw_if_index;
  vl_api_address_t local_addr;
  vl_api_address_t peer_addr;
  bool is_delayed;
};

/** \brief BFD UDP - enable multihop support
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
*/
autoreply define bfd_udp_enable_multihop
{
  u32 client_index;
  u32 context;
};

/* must be compatible with bfd_error_t */
counters bfd_udp {
  none {
    severity info;
    type counter64;
    units "packets";
    description "OK";
  };
  bad {
    severity error;
    type counter64;
    units "packets";
    description "bad packet";
  };
  disabled {
    severity error;
    type counter64;
    units "packets";
    description "bfd packets received on disabled interfaces";
  };
  version {
    severity error;
    type counter64;
    units "packets";
    description "version";
  };
  length {
    severity error;
    type counter64;
    units "packets";
    description "too short";
  };
  detect_multi {
    severity error;
    type counter64;
    units "packets";
    description "detect-multi";
  };
  multi_point {
    severity error;
    type counter64;
    units "packets";
    description "multi-point";
  };
  my_disc {
    severity error;
    type counter64;
    units "packets";
    description "my-disc";
  };
  your_disc {
    severity error;
    type counter64;
    units "packets";
    description "your-disc";
  };
  admin_down {
    severity error;
    type counter64;
    units "packets";
    description "session admin-down";
  };
  no_session {
    severity error;
    type counter64;
    units "packets";
    description "no-session";
  };
  failed_verification {
    severity error;
    type counter64;
    units "packets";
    description "failed-verification";
  };
  src_mismatch {
    severity error;
    type counter64;
    units "packets";
    description "src-mismatch";
  };
  dst_mismatch {
    severity error;
    type counter64;
    units "packets";
    description "dst-mismatch";
  };
  ttl {
    severity error;
    type counter64;
    units "packets";
    description "ttl";
  };
};

paths {
  "/err/bfd-udp4-input" "bfd";
  "/err/bfd-udp6-input" "bfd";
  "/err/bfd-udp4-echo-input" "bfd";
  "/err/bfd-udp6-echo-input" "bfd";
};

/*
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */