/*
 * 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/acl_list.hpp"
#include "vom/acl_list_cmds.hpp"
#include "vom/logger.hpp"
#include "vom/singular_db_funcs.hpp"

namespace VOM {
namespace ACL {

template <>
l2_list::event_handler::event_handler()
{
  OM::register_listener(this);
  inspect::register_handler({ "l2-acl-list" }, "L2 ACL lists", this);
}

template <>
void
l2_list::event_handler::handle_populate(const client_db::key_t& key)
{
  /* hack to get this function instantiated */
  m_evh.order();

  /*
   * dump VPP Bridge domains
   */
  std::shared_ptr<list_cmds::l2_dump_cmd> cmd =
    std::make_shared<list_cmds::l2_dump_cmd>();

  HW::enqueue(cmd);
  HW::write();

  for (auto& record : *cmd) {
    auto& payload = record.get_payload();

    const handle_t hdl(payload.acl_index);
    l2_list acl(hdl, std::string(reinterpret_cast<const char*>(payload.tag)));

    for (unsigned int ii = 0; ii < payload.count; ii++) {
      const route::prefix_t pfx(payload.r[ii].is_ipv6,
                                payload.r[ii].src_ip_addr,
                                payload.r[ii].src_ip_prefix_len);
      l2_rule rule(ii, action_t::from_int(payload.r[ii].is_permit), pfx,
                   { payload.r[ii].src_mac }, { payload.r[ii].src_mac_mask });

      acl.insert(rule);
    }
    VOM_LOG(log_level_t::DEBUG) << "dump: " << acl.to_string();

    /*
     * Write each of the discovered ACLs into the OM,
     * but disable the HW Command q whilst we do, so that no
     * commands are sent to VPP
     */
    OM::commit(key, acl);
  }
}

template <>
void
l2_list::event_handler::show(std::ostream& os)
{
  db_dump(m_db, os);
}

template <>
l3_list::event_handler::event_handler()
{
  OM::register_listener(this);
  inspect::register_handler({ "l3-acl-list" }, "L3 ACL lists", this);
}

template <>
void
l3_list::event_handler::handle_populate(const client_db::key_t& key)
{
  /* hack to get this function instantiated */
  m_evh.order();

  /*
   * dump L3 ACLs Bridge domains
   */
  std::shared_ptr<list_cmds::l3_dump_cmd> cmd =
    std::make_shared<list_cmds::l3_dump_cmd>();

  HW::enqueue(cmd);
  HW::write();

  for (auto& record : *cmd) {
    auto& payload = record.get_payload();

    const handle_t hdl(payload.acl_index);
    l3_list acl(hdl, std::string(reinterpret_cast<const char*>(payload.tag)));

    for (unsigned int ii = 0; ii < payload.count; ii++) {
      const route::prefix_t src(payload.r[ii].is_ipv6,
                                payload.r[ii].src_ip_addr,
                                payload.r[ii].src_ip_prefix_len);
      const route::prefix_t dst(payload.r[ii].is_ipv6,
                                payload.r[ii].dst_ip_addr,
                                payload.r[ii].dst_ip_prefix_len);
      l3_rule rule(ii, action_t::from_int(payload.r[ii].is_permit), src, dst);

      rule.set_proto(payload.r[ii].proto);
      rule.set_src_from_port(payload.r[ii].srcport_or_icmptype_first);
      rule.set_src_to_port(payload.r[ii].srcport_or_icmptype_last);
      rule.set_dst_from_port(payload.r[ii].dstport_or_icmpcode_first);
      rule.set_dst_to_port(payload.r[ii].dstport_or_icmpcode_last);
      rule.set_tcp_flags_mask(payload.r[ii].tcp_flags_mask);
      rule.set_tcp_flags_value(payload.r[ii].tcp_flags_value);

      acl.insert(rule);
    }
    VOM_LOG(log_level_t::DEBUG) << "dump: " << acl.to_string();

    /*
     * Write each of the discovered ACLs into the OM,
     * but disable the HW Command q whilst we do, so that no
     * commands are sent to VPP
     */
    OM::commit(key, acl);
  }
}

template <>
void
l3_list::event_handler::show(std::ostream& os)
{
  db_dump(m_db, os);
}

template <>
void
l3_list::update(const l3_list& obj)
{
  /*
   * always update the instance with the latest rule set
   */
  if (rc_t::OK != m_hdl.rc() || obj.m_rules != m_rules) {
    HW::enqueue(new list_cmds::l3_update_cmd(m_hdl, m_key, m_rules));
  }
  /*
   * We don't, can't, read the priority from VPP,
   * so the is equals check above does not include the priorty.
   * but we save it now.
   */
  m_rules = obj.m_rules;
}
template <>
void
l2_list::update(const l2_list& obj)
{
  /*
   * always update the instance with the latest rule set
   */
  if (rc_t::OK != m_hdl.rc() || obj.m_rules != m_rules) {
    HW::enqueue(new list_cmds::l2_update_cmd(m_hdl, m_key, m_rules));
  }
  /*
   * We don't, can't, read the priority from VPP,
   * so the is equals check above does not include the priorty.
   * but we save it now.
   */
  m_rules = obj.m_rules;
}
/**
 * Sweep/reap the object if still stale
 */
template <>
void
l3_list::sweep(void)
{
  if (m_hdl) {
    HW::enqueue(new list_cmds::l3_delete_cmd(m_hdl));
  }
  HW::write();
}
template <>
void
l2_list::sweep(void)
{
  if (m_hdl) {
    HW::enqueue(new list_cmds::l2_delete_cmd(m_hdl));
  }
  HW::write();
}

/**
 * Replay the objects state to HW
 */
template <>
void
l3_list::replay(void)
{
  if (m_hdl) {
    m_hdl.data().reset();
    HW::enqueue(new list_cmds::l3_update_cmd(m_hdl, m_key, m_rules));
  }
}
template <>
void
l2_list::replay(void)
{
  if (m_hdl) {
    m_hdl.data().reset();
    HW::enqueue(new list_cmds::l2_update_cmd(m_hdl, m_key, m_rules));
  }
}

}; // namespace ACL
}; // namespace VOM

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