/*
 * 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.
 */

#include "vom/tap_interface_cmds.hpp"

#include <vapi/tap.api.vapi.hpp>
#include <vapi/tapv2.api.vapi.hpp>

DEFINE_VAPI_MSG_IDS_TAP_API_JSON;
DEFINE_VAPI_MSG_IDS_TAPV2_API_JSON;

namespace VOM {
namespace tap_interface_cmds {
tap_create_cmd::tap_create_cmd(HW::item<handle_t>& item,
                               const std::string& name,
                               route::prefix_t& prefix,
                               const l2_address_t& l2_address)
  : interface::create_cmd<vapi::Tap_connect>(item, name)
  , m_prefix(prefix)
  , m_l2_address(l2_address)
{
}

rc_t
tap_create_cmd::issue(connection& con)
{
  msg_t req(con.ctx(), std::ref(*this));

  auto& payload = req.get_request().get_payload();
  memset(payload.tap_name, 0, sizeof(payload.tap_name));
  memcpy(payload.tap_name, m_name.c_str(),
         std::min(m_name.length(), sizeof(payload.tap_name)));
  if (m_prefix != route::prefix_t::ZERO) {
    if (m_prefix.address().is_v6()) {
      m_prefix.to_vpp(&payload.ip6_address_set, payload.ip6_address,
                      &payload.ip6_mask_width);
    } else {
      m_prefix.to_vpp(&payload.ip4_address_set, payload.ip4_address,
                      &payload.ip4_mask_width);
      payload.ip4_address_set = 1;
    }
  }

  if (m_l2_address != l2_address_t::ZERO) {
    m_l2_address.to_bytes(payload.mac_address, 6);
  } else {
    payload.use_random_mac = 1;
  }

  VAPI_CALL(req.execute());

  m_hw_item = wait();
  if (m_hw_item.rc() == rc_t::OK) {
    insert_interface();
  }

  return rc_t::OK;
}

std::string
tap_create_cmd::to_string() const
{
  std::ostringstream s;
  s << "tap-intf-create: " << m_hw_item.to_string()
    << " ip-prefix:" << m_prefix.to_string();

  return (s.str());
}

tap_delete_cmd::tap_delete_cmd(HW::item<handle_t>& item)
  : interface::delete_cmd<vapi::Tap_delete>(item)
{
}

rc_t
tap_delete_cmd::issue(connection& con)
{
  msg_t req(con.ctx(), std::ref(*this));

  auto& payload = req.get_request().get_payload();
  payload.sw_if_index = m_hw_item.data().value();

  VAPI_CALL(req.execute());

  wait();
  m_hw_item.set(rc_t::NOOP);

  remove_interface();
  return rc_t::OK;
}

std::string
tap_delete_cmd::to_string() const
{
  std::ostringstream s;
  s << "tap-itf-delete: " << m_hw_item.to_string();

  return (s.str());
}

tap_dump_cmd::tap_dump_cmd()
{
}

bool
tap_dump_cmd::operator==(const tap_dump_cmd& other) const
{
  return (true);
}

rc_t
tap_dump_cmd::issue(connection& con)
{
  m_dump.reset(new msg_t(con.ctx(), std::ref(*this)));

  VAPI_CALL(m_dump->execute());

  wait();

  return rc_t::OK;
}

std::string
tap_dump_cmd::to_string() const
{
  return ("tap-itf-dump");
}

/*
 * TAPV2
 */
tapv2_create_cmd::tapv2_create_cmd(HW::item<handle_t>& item,
                                   const std::string& name,
                                   route::prefix_t& prefix,
                                   const l2_address_t& l2_address)
  : interface::create_cmd<vapi::Tap_create_v2>(item, name)
  , m_prefix(prefix)
  , m_l2_address(l2_address)
{
}

rc_t
tapv2_create_cmd::issue(connection& con)
{
  msg_t req(con.ctx(), std::ref(*this));

  auto& payload = req.get_request().get_payload();
  memset(payload.host_if_name, 0, sizeof(payload.host_if_name));
  memcpy(payload.host_if_name, m_name.c_str(),
         std::min(m_name.length(), sizeof(payload.host_if_name)));
  payload.host_if_name_set = 1;

  if (m_prefix != route::prefix_t::ZERO) {
    if (m_prefix.address().is_v6()) {
      m_prefix.to_vpp(&payload.host_ip6_addr_set, payload.host_ip6_addr,
                      &payload.host_ip6_prefix_len);
    } else {
      m_prefix.to_vpp(&payload.host_ip4_addr_set, payload.host_ip4_addr,
                      &payload.host_ip4_prefix_len);
      payload.host_ip4_addr_set = 1;
    }
  }

  if (m_l2_address != l2_address_t::ZERO) {
    m_l2_address.to_bytes(payload.host_mac_addr, 6);
    payload.host_mac_addr_set = 1;
  }

  payload.id = 0xffffffff;
  payload.use_random_mac = 1;
  payload.tx_ring_sz = 1024;
  payload.rx_ring_sz = 1024;

  VAPI_CALL(req.execute());

  m_hw_item = wait();
  if (m_hw_item.rc() == rc_t::OK) {
    insert_interface();
  }

  return rc_t::OK;
}

std::string
tapv2_create_cmd::to_string() const
{
  std::ostringstream s;
  s << "tapv2-intf-create: " << m_hw_item.to_string()
    << " ip-prefix:" << m_prefix.to_string();

  return (s.str());
}

tapv2_delete_cmd::tapv2_delete_cmd(HW::item<handle_t>& item)
  : interface::delete_cmd<vapi::Tap_delete_v2>(item)
{
}

rc_t
tapv2_delete_cmd::issue(connection& con)
{

  msg_t req(con.ctx(), std::ref(*this));

  auto& payload = req.get_request().get_payload();

  payload.sw_if_index = m_hw_item.data().value();

  VAPI_CALL(req.execute());

  wait();
  m_hw_item.set(rc_t::NOOP);

  remove_interface();
  return rc_t::OK;
}
std::string
tapv2_delete_cmd::to_string() const
{
  std::ostringstream s;
  s << "tapv2-itf-delete: " << m_hw_item.to_string();

  return (s.str());
}

tapv2_dump_cmd::tapv2_dump_cmd()
{
}

bool
tapv2_dump_cmd::operator==(const tapv2_dump_cmd& other) const
{
  return (true);
}

rc_t
tapv2_dump_cmd::issue(connection& con)
{
  m_dump.reset(new msg_t(con.ctx(), std::ref(*this)));

  VAPI_CALL(m_dump->execute());

  wait();

  return rc_t::OK;
}

std::string
tapv2_dump_cmd::to_string() const
{
  return ("tapv2-itf-dump");
}

} // namespace tap_interface_cmds
} // namespace VOM

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "mozilla")
 * End:
 */