/* Hey Emacs use -*- mode: C -*- */
/*
 *------------------------------------------------------------------
 * Copyright (c) 2017 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 = "1.0.0";
import "vnet/ip/ip_types.api";
import "vnet/interface_types.api";

/**
 * @brief Filter mode
 */
enum filter_mode {
  EXCLUDE = 0,
  INCLUDE = 1,
};


/**
 * @brief
 *   Used by a 'host' to enable the reception/listening of packets for a specific
 *   multicast group
 *
 *  For each socket on which IPMulticastListen has been invoked, the
 *  system records the desired multicast reception state for that socket.
 *  That state conceptually consists of a set of records of the form:
 *
 *     (interface, multicast-address, filter-mode, source-list)
 *
 *  The socket state evolves in response to each invocation of
 *  IPMulticastListen on the socket, as follows:
 *
 *  o If the requested filter mode is INCLUDE *and* the requested source
 *    list is empty, then the entry corresponding to the requested
 *    interface and multicast address is deleted if present.  If no such
 *    entry is present, the request is ignored.
 *
 *  o If the requested filter mode is EXCLUDE *or* the requested source
 *    list is non-empty, then the entry corresponding to the requested
 *    interface and multicast address, if present, is changed to contain
 *    the requested filter mode and source list.  If no such entry is
 *    present, a new entry is created, using the parameters specified in
 *    the request.
 *
 *   @param client_index - opaque cookie to identify the sender
 *   @param context - sender context, to match reply w/ request
 *   @param sw_if_index - interface sw index
 *   @param filter - filter mode
 *   @param saddr - source address
 *   @param gaddr - group address
 */
typedef igmp_group
{
  vl_api_filter_mode_t filter;
  u8 n_srcs;
  vl_api_interface_index_t sw_if_index;
  vl_api_ip4_address_t gaddr;
  vl_api_ip4_address_t saddrs[n_srcs];
};
autoreply define igmp_listen
{
  u32 client_index;
  u32 context;

  vl_api_igmp_group_t group;
};

/**
 * @brief
 *   Used by a 'router' and 'host' to enable the reception of IGMP packets.
 *   For hosts this must be called once before igmp_listen.
 *
 *   @param client_index - opaque cookie to identify the sender
 *   @param context - sender context, to match reply w/ request
 *   @param enable - if set, enable igmp messages on configuration
 *   @param mode - Host (1) or router (0) mode
 *   @param sw_if_index - interface sw index
 */
autoreply define igmp_enable_disable
{
  u32 client_index;
  u32 context;

  bool enable;
  u8 mode;
  vl_api_interface_index_t sw_if_index;
};

/**
 * @brief
 *  Add/del proxy device on specified VRF.
 *  Interface must be IGMP enabled in HOST mode.
 *
 *   @param client_index - opaque cookie to identify the sender
 *   @param context - sender context, to match reply w/ request
 *   @param add - add (1) del (0)
 *   @param vrf_id - VRF id
 *   @param sw_if_index - upstream interface sw index
 */
autoreply define igmp_proxy_device_add_del
{
  u32 client_index;
  u32 context;

  u8 add;
  u32 vrf_id;
  vl_api_interface_index_t sw_if_index;
};

/**
 * @brief
 *  Add/del downstream interface to/from proxy device.
 *  Interface must be IGMP enabled in ROUTER mode.
 *
 *   @param client_index - opaque cookie to identify the sender
 *   @param context - sender context, to match reply w/ request
 *   @param add - add (1) del (0)
 *   @param vrf_id - VRF id
 *   @param sw_if_index - downstream interface sw index
 */
autoreply define igmp_proxy_device_add_del_interface
{
  u32 client_index;
  u32 context;

  bool add;
  u32 vrf_id;
  vl_api_interface_index_t sw_if_index;
};

/**
 * @brief dump (S,G)s from interface
 * @param client_index - opaque cookie to identify the sender
 * @param context - sender context, to match reply w/ request
 * @param sw_if_index - interface sw index (~0 for all)
*/
define igmp_dump
{
  u32 client_index;
  u32 context;

  vl_api_interface_index_t sw_if_index;
};

/**
 * @brief igmp details
 * @param context - sender context, to match reply w/ request
 * @param sw_if_index - interface sw index
 * @param saddr - source address
 * @param gaddr - group address
 */
define igmp_details
{
  u32 context;

  vl_api_interface_index_t sw_if_index;
  vl_api_ip4_address_t saddr;
  vl_api_ip4_address_t gaddr;
};

/** \brief remove all (S,G)s from an interface
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
    @param sw_if_index - interface sw index
*/
autoreply define igmp_clear_interface
{
  u32 client_index;
  u32 context;

  vl_api_interface_index_t sw_if_index;
};

/**
 * @brief register for igmp events
 * @param client_index - opaque cookie to identify the sender
 * @param context - sender context, to match reply w/ request
 * @param pid - sender's pid
 * @param enable - 1 enable, 0 disable igmp events
 */
autoreply define want_igmp_events
{
  u32 client_index;
  u32 context;

  u32 enable;
  u32 pid;
};

service {
  rpc want_igmp_events returns want_igmp_events_reply
    events igmp_event;
};

/**
 * @brief igmp event details
 * @param client_index - opaque cookie to identify the sender
 * @param context - sender context, to match reply w/ request
 * @param sw_if_index - interface sw index
 * @param saddr - source address
 * @param gaddr - group address
 *@param filter - filter mode
 */
define igmp_event
{
  vl_api_interface_index_t sw_if_index;
  vl_api_filter_mode_t filter;
  vl_api_ip4_address_t saddr;
  vl_api_ip4_address_t gaddr;
};

/**
 * @brief enum to specify either ASM or SSM semantics
 */
enum group_prefix_type
{
  ASM = 0,
  SSM = 1,
};

/**
 * @brief Definition of a Group prefix and its type
 */
typedef group_prefix
{
  vl_api_group_prefix_type_t type;
  vl_api_prefix_t prefix;
};

/**
 * @brief Configure a prefix for SSM or ASM semantics
 * @param address - Prefix address
 * @param address_length - Prefix length
 */
autoreply define igmp_group_prefix_set
{
  u32 client_index;
  u32 context;

  vl_api_group_prefix_t gp;
};

define igmp_group_prefix_dump
{
  u32 client_index;
  u32 context;
};

define igmp_group_prefix_details
{
  u32 context;

  vl_api_group_prefix_t gp;
};


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