polybar/src/modules/network.cpp

#include "modules/network.hpp"

#include "drawtypes/animation.hpp"
#include "drawtypes/label.hpp"
#include "drawtypes/ramp.hpp"
#include "modules/meta/base.inl"

POLYBAR_NS

namespace modules {
  template class module<network_module>;

  network_module::network_module(const bar_settings& bar, string name_)
      : timer_module<network_module>(bar, move(name_)) {
    // Load configuration values
    m_interface = m_conf.get(name(), "interface", m_interface);

    if (m_interface.empty()) {
      std::string type = m_conf.get(name(), "interface-type");
      if (type == "wired") {
        m_interface = net::find_wired_interface();
        if (!m_interface.empty()) {
          m_log.notice("%s: Discovered wired interface %s", name(), m_interface);
        }
      } else if (type == "wireless") {
        m_interface = net::find_wireless_interface();
        if (!m_interface.empty()) {
          m_log.notice("%s: Discovered wireless interface %s", name(), m_interface);
        }
      } else {
        throw module_error("Invalid interface type '" + type + "'");
      }

      if (m_interface.empty()) {
        throw module_error("No interface found for type '" + type + "'");
      }
    }

    if (m_interface.empty()) {
      throw module_error("Missing 'interface' or 'interface-type'");
    }

    if (!net::is_interface_valid(m_interface)) {
      throw module_error("Invalid network interface \"" + m_interface + "\"");
    }

    auto canonical = net::get_canonical_interface(m_interface);

    if (canonical.second) {
      m_log.info(
          "%s: Replacing given interface '%s' with its canonical name '%s'", name(), m_interface, canonical.first);
      m_interface = canonical.first;
    }

    m_ping_nth_update = m_conf.get(name(), "ping-interval", m_ping_nth_update);
    m_udspeed_minwidth = m_conf.get(name(), "udspeed-minwidth", m_udspeed_minwidth);
    m_accumulate = m_conf.get(name(), "accumulate-stats", m_accumulate);
    set_interval(1s);
    m_unknown_up = m_conf.get<bool>(name(), "unknown-as-up", false);
    m_udspeed_unit = m_conf.get<string>(name(), "speed-unit", m_udspeed_unit);

    m_conf.warn_deprecated(name(), "udspeed-minwidth", "%downspeed:min:max% and %upspeed:min:max%");

    // Add formats
    m_formatter->add(FORMAT_CONNECTED, TAG_LABEL_CONNECTED, {TAG_RAMP_SIGNAL, TAG_RAMP_QUALITY, TAG_LABEL_CONNECTED});
    m_formatter->add(FORMAT_DISCONNECTED, TAG_LABEL_DISCONNECTED, {TAG_LABEL_DISCONNECTED});

    // Create elements for format-connected
    if (m_formatter->has(TAG_RAMP_SIGNAL, FORMAT_CONNECTED)) {
      m_ramp_signal = load_ramp(m_conf, name(), TAG_RAMP_SIGNAL);
    }
    if (m_formatter->has(TAG_RAMP_QUALITY, FORMAT_CONNECTED)) {
      m_ramp_quality = load_ramp(m_conf, name(), TAG_RAMP_QUALITY);
    }
    if (m_formatter->has(TAG_LABEL_CONNECTED, FORMAT_CONNECTED)) {
      m_label[connection_state::CONNECTED] =
          load_optional_label(m_conf, name(), TAG_LABEL_CONNECTED, "%ifname% %local_ip%");
    }

    // Create elements for format-disconnected
    if (m_formatter->has(TAG_LABEL_DISCONNECTED, FORMAT_DISCONNECTED)) {
      m_label[connection_state::DISCONNECTED] = load_optional_label(m_conf, name(), TAG_LABEL_DISCONNECTED, "");
      m_label[connection_state::DISCONNECTED]->reset_tokens();
      m_label[connection_state::DISCONNECTED]->replace_token("%ifname%", m_interface);
    }

    // Create elements for format-packetloss if we are told to test connectivity
    if (m_ping_nth_update > 0) {
      m_formatter->add(FORMAT_PACKETLOSS, TAG_LABEL_CONNECTED,
          {TAG_ANIMATION_PACKETLOSS, TAG_LABEL_PACKETLOSS, TAG_LABEL_CONNECTED});

      if (m_formatter->has(TAG_LABEL_PACKETLOSS, FORMAT_PACKETLOSS)) {
        m_label[connection_state::PACKETLOSS] = load_optional_label(m_conf, name(), TAG_LABEL_PACKETLOSS, "");
      }
      if (m_formatter->has(TAG_ANIMATION_PACKETLOSS, FORMAT_PACKETLOSS)) {
        m_animation_packetloss = load_animation(m_conf, name(), TAG_ANIMATION_PACKETLOSS);
      }
    }

    // Get an intstance of the network interface
    if (net::is_wireless_interface(m_interface)) {
      m_wireless = std::make_unique<net::wireless_network>(m_interface);
      m_wireless->set_unknown_up(m_unknown_up);
    } else {
      m_wired = std::make_unique<net::wired_network>(m_interface);
      m_wired->set_unknown_up(m_unknown_up);
    };

    // We only need to start the subthread if the packetloss animation is used
    if (m_animation_packetloss) {
      m_threads.emplace_back(thread(&network_module::subthread_routine, this));
    }
  }

  void network_module::teardown() {
    m_wireless.reset();
    m_wired.reset();
  }

  bool network_module::update() {
    net::network* network =
        m_wireless ? static_cast<net::network*>(m_wireless.get()) : static_cast<net::network*>(m_wired.get());

    if (!network->query(m_accumulate)) {
      m_log.warn("%s: Failed to query interface '%s'", name(), m_interface);
      m_connected = false;
      return false;
    }

    try {
      if (m_wireless) {
        m_signal = m_wireless->signal();
        m_quality = m_wireless->quality();
      }
    } catch (const net::network_error& err) {
      m_log.warn("%s: Error getting interface data (%s)", name(), err.what());
    }

    m_connected = network->connected();

    // Ignore the first run
    if (m_counter == -1) {
      m_counter = 0;
    } else if (m_ping_nth_update > 0 && m_connected && (++m_counter % m_ping_nth_update) == 0) {
      m_packetloss = !network->ping();
      m_counter = 0;
    }

    auto upspeed = network->upspeed(m_udspeed_minwidth, m_udspeed_unit);
    auto downspeed = network->downspeed(m_udspeed_minwidth, m_udspeed_unit);

    // Update label contents
    const auto replace_tokens = [&](label_t& label) {
      label->reset_tokens();
      label->replace_token("%ifname%", m_interface);
      label->replace_token("%local_ip%", network->ip());
      label->replace_token("%local_ip6%", network->ip6());
      label->replace_token("%upspeed%", upspeed);
      label->replace_token("%downspeed%", downspeed);

      if (m_wired) {
        label->replace_token("%linkspeed%", m_wired->linkspeed());
      } else if (m_wireless) {
        label->replace_token("%essid%", m_wireless->essid());
        label->replace_token("%signal%", to_string(m_signal));
        label->replace_token("%quality%", to_string(m_quality));
      }
    };

    if (m_label[connection_state::CONNECTED]) {
      replace_tokens(m_label[connection_state::CONNECTED]);
    }
    if (m_label[connection_state::PACKETLOSS]) {
      replace_tokens(m_label[connection_state::PACKETLOSS]);
    }
    if (m_label[connection_state::DISCONNECTED]) {
      replace_tokens(m_label[connection_state::DISCONNECTED]);
    }

    return true;
  }

  string network_module::get_format() const {
    if (!m_connected) {
      return FORMAT_DISCONNECTED;
    } else if (m_packetloss && m_ping_nth_update > 0) {
      return FORMAT_PACKETLOSS;
    } else {
      return FORMAT_CONNECTED;
    }
  }

  bool network_module::build(builder* builder, const string& tag) const {
    if (tag == TAG_LABEL_CONNECTED) {
      builder->node(m_label.at(connection_state::CONNECTED));
    } else if (tag == TAG_LABEL_DISCONNECTED) {
      builder->node(m_label.at(connection_state::DISCONNECTED));
    } else if (tag == TAG_LABEL_PACKETLOSS) {
      builder->node(m_label.at(connection_state::PACKETLOSS));
    } else if (tag == TAG_ANIMATION_PACKETLOSS) {
      builder->node(m_animation_packetloss->get());
    } else if (tag == TAG_RAMP_SIGNAL) {
      builder->node(m_ramp_signal->get_by_percentage(m_signal));
    } else if (tag == TAG_RAMP_QUALITY) {
      builder->node(m_ramp_quality->get_by_percentage(m_quality));
    } else {
      return false;
    }
    return true;
  }

  void network_module::subthread_routine() {
    const chrono::milliseconds framerate{m_animation_packetloss->framerate()};

    while (running()) {
      auto now = chrono::steady_clock::now();
      if (m_connected && m_packetloss) {
        m_animation_packetloss->increment();
        broadcast();
      }

      now += framerate;
      this_thread::sleep_until(now);
    }

    m_log.trace("%s: Reached end of network subthread", name());
  }
}  // namespace modules

POLYBAR_NS_END