786 lines
26 KiB
C++
786 lines
26 KiB
C++
#include "modules/network.hpp"
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#include <spdlog/spdlog.h>
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#include <sys/eventfd.h>
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#include <fstream>
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namespace {
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constexpr const char * NETSTAT_FILE = "/proc/net/netstat"; // std::ifstream does not take std::string_view as param
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constexpr std::string_view BANDWIDTH_CATEGORY = "IpExt";
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constexpr std::string_view BANDWIDTH_DOWN_TOTAL_KEY = "InOctets";
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constexpr std::string_view BANDWIDTH_UP_TOTAL_KEY = "OutOctets";
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std::ifstream netstat(NETSTAT_FILE);
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std::optional<unsigned long long> read_netstat(std::string_view category, std::string_view key) {
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if (!netstat) {
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spdlog::warn("Failed to open netstat file {}", NETSTAT_FILE);
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return {};
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}
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netstat.seekg(std::ios_base::beg);
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// finding corresponding line (category)
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// looks into the file for the first line starting by the 'category' string
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auto starts_with = [](const std::string& str, std::string_view start) {
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return start == std::string_view{str.data(), std::min(str.size(), start.size())};
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};
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std::string read;
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while (std::getline(netstat, read) && !starts_with(read, category));
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if (!starts_with(read, category)) {
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spdlog::warn("Category '{}' not found in netstat file {}", category, NETSTAT_FILE);
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return {};
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}
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// finding corresponding column (key)
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// looks into the fetched line for the first word (space separated) equal to 'key'
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int index = 0;
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auto r_it = read.begin();
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auto k_it = key.begin();
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while (k_it != key.end() && r_it != read.end()) {
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if (*r_it != *k_it) {
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r_it = std::find(r_it, read.end(), ' ');
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if (r_it != read.end()) {
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++r_it;
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}
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k_it = key.begin();
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++index;
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} else {
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++r_it;
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++k_it;
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}
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}
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if (r_it == read.end() && k_it != key.end()) {
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spdlog::warn("Key '{}' not found in category '{}' of netstat file {}", key, category, NETSTAT_FILE);
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return {};
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}
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// finally accessing value
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// accesses the line right under the fetched one
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std::getline(netstat, read);
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assert(starts_with(read, category));
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std::istringstream iss(read);
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while (index--) {
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std::getline(iss, read, ' ');
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}
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unsigned long long value;
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iss >> value;
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return value;
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}
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}
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waybar::modules::Network::Network(const std::string &id, const Json::Value &config)
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: ALabel(config, "{ifname}", 60),
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ifid_(-1),
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last_ext_iface_(-1),
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family_(config["family"] == "ipv6" ? AF_INET6 : AF_INET),
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efd_(-1),
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ev_fd_(-1),
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cidr_(-1),
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signal_strength_dbm_(0),
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signal_strength_(0),
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frequency_(0) {
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label_.set_name("network");
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if (!id.empty()) {
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label_.get_style_context()->add_class(id);
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}
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auto down_octets = read_netstat(BANDWIDTH_CATEGORY, BANDWIDTH_DOWN_TOTAL_KEY);
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auto up_octets = read_netstat(BANDWIDTH_CATEGORY, BANDWIDTH_UP_TOTAL_KEY);
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if (down_octets) {
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bandwidth_down_total_ = *down_octets;
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} else {
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bandwidth_down_total_ = 0;
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}
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if (up_octets) {
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bandwidth_up_total_ = *up_octets;
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} else {
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bandwidth_up_total_ = 0;
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}
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createInfoSocket();
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createEventSocket();
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auto default_iface = getPreferredIface();
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if (default_iface != -1) {
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char ifname[IF_NAMESIZE];
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if_indextoname(default_iface, ifname);
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ifname_ = ifname;
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getInterfaceAddress();
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}
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dp.emit();
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worker();
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}
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waybar::modules::Network::~Network() {
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if (ev_fd_ > -1) {
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eventfd_write(ev_fd_, 1);
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std::this_thread::sleep_for(std::chrono::milliseconds(150));
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close(ev_fd_);
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}
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if (efd_ > -1) {
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close(efd_);
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}
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if (ev_sock_ != nullptr) {
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nl_socket_drop_membership(ev_sock_, RTNLGRP_LINK);
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nl_socket_drop_membership(ev_sock_, RTNLGRP_IPV4_IFADDR);
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nl_socket_drop_membership(ev_sock_, RTNLGRP_IPV6_IFADDR);
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nl_close(ev_sock_);
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nl_socket_free(ev_sock_);
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}
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if (sock_ != nullptr) {
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nl_close(sock_);
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nl_socket_free(sock_);
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}
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}
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void waybar::modules::Network::createInfoSocket() {
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ev_sock_ = nl_socket_alloc();
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nl_socket_disable_seq_check(ev_sock_);
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nl_socket_modify_cb(ev_sock_, NL_CB_VALID, NL_CB_CUSTOM, handleEvents, this);
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nl_join_groups(ev_sock_, RTMGRP_LINK);
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if (nl_connect(ev_sock_, NETLINK_ROUTE) != 0) {
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throw std::runtime_error("Can't connect network socket");
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}
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nl_socket_add_membership(ev_sock_, RTNLGRP_LINK);
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nl_socket_add_membership(ev_sock_, RTNLGRP_IPV4_IFADDR);
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nl_socket_add_membership(ev_sock_, RTNLGRP_IPV6_IFADDR);
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efd_ = epoll_create1(EPOLL_CLOEXEC);
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if (efd_ < 0) {
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throw std::runtime_error("Can't create epoll");
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}
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{
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ev_fd_ = eventfd(0, EFD_NONBLOCK);
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struct epoll_event event;
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memset(&event, 0, sizeof(event));
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event.events = EPOLLIN | EPOLLET;
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event.data.fd = ev_fd_;
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if (epoll_ctl(efd_, EPOLL_CTL_ADD, ev_fd_, &event) == -1) {
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throw std::runtime_error("Can't add epoll event");
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}
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}
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{
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auto fd = nl_socket_get_fd(ev_sock_);
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struct epoll_event event;
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memset(&event, 0, sizeof(event));
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event.events = EPOLLIN | EPOLLET | EPOLLRDHUP;
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event.data.fd = fd;
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if (epoll_ctl(efd_, EPOLL_CTL_ADD, fd, &event) == -1) {
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throw std::runtime_error("Can't add epoll event");
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}
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}
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}
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void waybar::modules::Network::createEventSocket() {
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sock_ = nl_socket_alloc();
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if (genl_connect(sock_) != 0) {
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throw std::runtime_error("Can't connect to netlink socket");
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}
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if (nl_socket_modify_cb(sock_, NL_CB_VALID, NL_CB_CUSTOM, handleScan, this) < 0) {
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throw std::runtime_error("Can't set callback");
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}
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nl80211_id_ = genl_ctrl_resolve(sock_, "nl80211");
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if (nl80211_id_ < 0) {
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throw std::runtime_error("Can't resolve nl80211 interface");
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}
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}
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void waybar::modules::Network::worker() {
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thread_timer_ = [this] {
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{
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std::lock_guard<std::mutex> lock(mutex_);
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if (ifid_ > 0) {
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getInfo();
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dp.emit();
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}
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}
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thread_timer_.sleep_for(interval_);
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};
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std::array<struct epoll_event, EPOLL_MAX> events{};
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thread_ = [this, &events] {
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int ec = epoll_wait(efd_, events.data(), EPOLL_MAX, -1);
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if (ec > 0) {
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for (auto i = 0; i < ec; i++) {
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if (events[i].data.fd == nl_socket_get_fd(ev_sock_)) {
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nl_recvmsgs_default(ev_sock_);
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} else {
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thread_.stop();
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break;
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}
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}
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}
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};
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}
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auto waybar::modules::Network::update() -> void {
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std::string connectiontype;
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std::string tooltip_format;
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std::lock_guard<std::mutex> lock(mutex_);
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auto down_octets = read_netstat(BANDWIDTH_CATEGORY, BANDWIDTH_DOWN_TOTAL_KEY);
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auto up_octets = read_netstat(BANDWIDTH_CATEGORY, BANDWIDTH_UP_TOTAL_KEY);
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unsigned long long bandwidth_down = 0;
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if (down_octets) {
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bandwidth_down = *down_octets - bandwidth_down_total_;
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bandwidth_down_total_ = *down_octets;
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}
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unsigned long long bandwidth_up = 0;
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if (up_octets) {
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bandwidth_up = *up_octets - bandwidth_up_total_;
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bandwidth_up_total_ = *up_octets;
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}
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if (ifid_ <= 0 || !linked_) {
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if (config_["format-disconnected"].isString()) {
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default_format_ = config_["format-disconnected"].asString();
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}
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if (config_["tooltip-format-disconnected"].isString()) {
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tooltip_format = config_["tooltip-format-disconnected"].asString();
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}
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label_.get_style_context()->add_class("disconnected");
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connectiontype = "disconnected";
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} else {
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if (essid_.empty()) {
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if (config_["format-ethernet"].isString()) {
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default_format_ = config_["format-ethernet"].asString();
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}
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if (config_["tooltip-format-ethernet"].isString()) {
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tooltip_format = config_["tooltip-format-ethernet"].asString();
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}
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connectiontype = "ethernet";
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} else if (ipaddr_.empty()) {
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if (config_["format-linked"].isString()) {
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default_format_ = config_["format-linked"].asString();
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}
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if (config_["tooltip-format-linked"].isString()) {
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tooltip_format = config_["tooltip-format-linked"].asString();
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}
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connectiontype = "linked";
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} else {
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if (config_["format-wifi"].isString()) {
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default_format_ = config_["format-wifi"].asString();
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}
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if (config_["tooltip-format-wifi"].isString()) {
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tooltip_format = config_["tooltip-format-wifi"].asString();
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}
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connectiontype = "wifi";
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}
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label_.get_style_context()->remove_class("disconnected");
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}
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if (!alt_) {
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format_ = default_format_;
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}
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getState(signal_strength_);
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auto pow_format = [](unsigned long long value, const std::string& unit) {
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if (value > 2000ull * 1000ull * 1000ull) { // > 2G
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auto go = value / (1000 * 1000 * 1000);
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return std::to_string(go) + "." + std::to_string((value - go * 1000 * 1000 * 1000) / (100 * 1000 * 1000)) + "G" + unit;
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} else if (value > 2000ull * 1000ull) { // > 2M
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auto mo = value / (1000 * 1000);
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return std::to_string(mo) + "." + std::to_string((value - mo * 1000 * 1000) / (100 * 1000)) + "M" + unit;
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} else if (value > 2000ull) { // > 2k
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auto ko = value / 1000;
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return std::to_string(ko) + "." + std::to_string((value - ko * 1000) / 100) + "k" + unit;
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} else {
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return std::to_string(value) + unit;
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}
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};
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auto text = fmt::format(format_,
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fmt::arg("essid", essid_),
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fmt::arg("signaldBm", signal_strength_dbm_),
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fmt::arg("signalStrength", signal_strength_),
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fmt::arg("ifname", ifname_),
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fmt::arg("netmask", netmask_),
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fmt::arg("ipaddr", ipaddr_),
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fmt::arg("cidr", cidr_),
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fmt::arg("frequency", frequency_),
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fmt::arg("icon", getIcon(signal_strength_, connectiontype)),
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fmt::arg("bandwidthDownBits", pow_format(bandwidth_down * 8ull / interval_.count(), "b/s")),
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fmt::arg("bandwidthUpBits", pow_format(bandwidth_up * 8ull / interval_.count(), "b/s")),
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fmt::arg("bandwidthDownOctets", pow_format(bandwidth_down / interval_.count(), "o/s")),
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fmt::arg("bandwidthUpOctets", pow_format(bandwidth_up / interval_.count(), "o/s")));
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if (text != label_.get_label()) {
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label_.set_markup(text);
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}
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if (tooltipEnabled()) {
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if (tooltip_format.empty() && config_["tooltip-format"].isString()) {
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tooltip_format = config_["tooltip-format"].asString();
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}
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if (!tooltip_format.empty()) {
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auto tooltip_text = fmt::format(tooltip_format,
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fmt::arg("essid", essid_),
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fmt::arg("signaldBm", signal_strength_dbm_),
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fmt::arg("signalStrength", signal_strength_),
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fmt::arg("ifname", ifname_),
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fmt::arg("netmask", netmask_),
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fmt::arg("ipaddr", ipaddr_),
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fmt::arg("cidr", cidr_),
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fmt::arg("frequency", frequency_),
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fmt::arg("icon", getIcon(signal_strength_, connectiontype)),
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fmt::arg("bandwidthDownBits", pow_format(bandwidth_down * 8ull / interval_.count(), "b/s")),
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fmt::arg("bandwidthUpBits", pow_format(bandwidth_up * 8ull / interval_.count(), "b/s")),
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fmt::arg("bandwidthDownOctets", pow_format(bandwidth_down / interval_.count(), "o/s")),
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fmt::arg("bandwidthUpOctets", pow_format(bandwidth_up / interval_.count(), "o/s")));
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if (label_.get_tooltip_text() != text) {
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label_.set_tooltip_text(tooltip_text);
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}
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} else if (label_.get_tooltip_text() != text) {
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label_.set_tooltip_text(text);
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}
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}
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}
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// Based on https://gist.github.com/Yawning/c70d804d4b8ae78cc698
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int waybar::modules::Network::getExternalInterface() {
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static const uint32_t route_buffer_size = 8192;
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struct nlmsghdr * hdr = nullptr;
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struct rtmsg * rt = nullptr;
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char resp[route_buffer_size] = {0};
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int ifidx = -1;
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/* Prepare request. */
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constexpr uint32_t reqlen = NLMSG_SPACE(sizeof(*rt));
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char req[reqlen] = {0};
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/* Build the RTM_GETROUTE request. */
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hdr = reinterpret_cast<struct nlmsghdr *>(req);
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hdr->nlmsg_len = NLMSG_LENGTH(sizeof(*rt));
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hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
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hdr->nlmsg_type = RTM_GETROUTE;
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rt = static_cast<struct rtmsg *>(NLMSG_DATA(hdr));
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rt->rtm_family = family_;
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rt->rtm_table = RT_TABLE_MAIN;
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/* Issue the query. */
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if (netlinkRequest(req, reqlen) < 0) {
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goto out;
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}
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/* Read the response(s).
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*
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* WARNING: All the packets generated by the request must be consumed (as in,
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* consume responses till NLMSG_DONE/NLMSG_ERROR is encountered).
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*/
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do {
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auto len = netlinkResponse(resp, route_buffer_size);
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if (len < 0) {
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goto out;
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}
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/* Parse the response payload into netlink messages. */
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for (hdr = reinterpret_cast<struct nlmsghdr *>(resp); NLMSG_OK(hdr, len);
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hdr = NLMSG_NEXT(hdr, len)) {
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if (hdr->nlmsg_type == NLMSG_DONE) {
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goto out;
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}
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if (hdr->nlmsg_type == NLMSG_ERROR) {
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/* Even if we found the interface index, something is broken with the
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* netlink socket, so return an error.
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*/
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ifidx = -1;
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goto out;
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}
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/* If we found the correct answer, skip parsing the attributes. */
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if (ifidx != -1) {
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continue;
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}
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/* Find the message(s) concerting the main routing table, each message
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* corresponds to a single routing table entry.
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*/
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rt = static_cast<struct rtmsg *>(NLMSG_DATA(hdr));
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if (rt->rtm_table != RT_TABLE_MAIN) {
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continue;
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}
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/* Parse all the attributes for a single routing table entry. */
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struct rtattr *attr = RTM_RTA(rt);
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uint64_t attrlen = RTM_PAYLOAD(hdr);
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bool has_gateway = false;
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bool has_destination = false;
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int temp_idx = -1;
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for (; RTA_OK(attr, attrlen); attr = RTA_NEXT(attr, attrlen)) {
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/* Determine if this routing table entry corresponds to the default
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* route by seeing if it has a gateway, and if a destination addr is
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* set, that it is all 0s.
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*/
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switch (attr->rta_type) {
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case RTA_GATEWAY:
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/* The gateway of the route.
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*
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* If someone every needs to figure out the gateway address as well,
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* it's here as the attribute payload.
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*/
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has_gateway = true;
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break;
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case RTA_DST: {
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/* The destination address.
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* Should be either missing, or maybe all 0s. Accept both.
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*/
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const uint32_t nr_zeroes = (family_ == AF_INET) ? 4 : 16;
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unsigned char c = 0;
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size_t dstlen = RTA_PAYLOAD(attr);
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if (dstlen != nr_zeroes) {
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break;
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}
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for (uint32_t i = 0; i < dstlen; i += 1) {
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c |= *((unsigned char *)RTA_DATA(attr) + i);
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}
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has_destination = (c == 0);
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break;
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}
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case RTA_OIF:
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/* The output interface index. */
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temp_idx = *static_cast<int *>(RTA_DATA(attr));
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break;
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default:
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break;
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}
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}
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/* If this is the default route, and we know the interface index,
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* we can stop parsing this message.
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*/
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if (has_gateway && !has_destination && temp_idx != -1) {
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ifidx = temp_idx;
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break;
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}
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}
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} while (true);
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out:
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last_ext_iface_ = ifidx;
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return ifidx;
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}
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void waybar::modules::Network::getInterfaceAddress() {
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unsigned int cidrRaw;
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struct ifaddrs *ifaddr, *ifa;
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ipaddr_.clear();
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netmask_.clear();
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cidr_ = 0;
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int success = getifaddrs(&ifaddr);
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if (success != 0) {
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return;
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}
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ifa = ifaddr;
|
|
while (ifa != nullptr && ipaddr_.empty() && netmask_.empty()) {
|
|
if (ifa->ifa_addr != nullptr && ifa->ifa_addr->sa_family == family_ &&
|
|
ifa->ifa_name == ifname_) {
|
|
char ipaddr[INET6_ADDRSTRLEN];
|
|
ipaddr_ = inet_ntop(family_,
|
|
&reinterpret_cast<struct sockaddr_in *>(ifa->ifa_addr)->sin_addr,
|
|
ipaddr,
|
|
INET6_ADDRSTRLEN);
|
|
char netmask[INET6_ADDRSTRLEN];
|
|
auto net_addr = reinterpret_cast<struct sockaddr_in *>(ifa->ifa_netmask);
|
|
netmask_ = inet_ntop(family_, &net_addr->sin_addr, netmask, INET6_ADDRSTRLEN);
|
|
cidrRaw = net_addr->sin_addr.s_addr;
|
|
linked_ = ifa->ifa_flags & IFF_RUNNING;
|
|
unsigned int cidr = 0;
|
|
while (cidrRaw) {
|
|
cidr += cidrRaw & 1;
|
|
cidrRaw >>= 1;
|
|
}
|
|
cidr_ = cidr;
|
|
}
|
|
ifa = ifa->ifa_next;
|
|
}
|
|
freeifaddrs(ifaddr);
|
|
}
|
|
|
|
int waybar::modules::Network::netlinkRequest(void *req, uint32_t reqlen, uint32_t groups) {
|
|
struct sockaddr_nl sa = {};
|
|
sa.nl_family = AF_NETLINK;
|
|
sa.nl_groups = groups;
|
|
struct iovec iov = {req, reqlen};
|
|
struct msghdr msg = {
|
|
.msg_name = &sa,
|
|
.msg_namelen = sizeof(sa),
|
|
.msg_iov = &iov,
|
|
.msg_iovlen = 1,
|
|
};
|
|
return sendmsg(nl_socket_get_fd(ev_sock_), &msg, 0);
|
|
}
|
|
|
|
int waybar::modules::Network::netlinkResponse(void *resp, uint32_t resplen, uint32_t groups) {
|
|
struct sockaddr_nl sa = {};
|
|
sa.nl_family = AF_NETLINK;
|
|
sa.nl_groups = groups;
|
|
struct iovec iov = {resp, resplen};
|
|
struct msghdr msg = {
|
|
.msg_name = &sa,
|
|
.msg_namelen = sizeof(sa),
|
|
.msg_iov = &iov,
|
|
.msg_iovlen = 1,
|
|
};
|
|
auto ret = recvmsg(nl_socket_get_fd(ev_sock_), &msg, 0);
|
|
if (msg.msg_flags & MSG_TRUNC) {
|
|
return -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
bool waybar::modules::Network::checkInterface(struct ifinfomsg *rtif, std::string name) {
|
|
if (config_["interface"].isString()) {
|
|
return config_["interface"].asString() == name ||
|
|
wildcardMatch(config_["interface"].asString(), name);
|
|
}
|
|
auto external_iface = getExternalInterface();
|
|
if (external_iface == -1) {
|
|
// Try with lastest working external iface
|
|
return last_ext_iface_ == rtif->ifi_index;
|
|
}
|
|
return external_iface == rtif->ifi_index;
|
|
}
|
|
|
|
int waybar::modules::Network::getPreferredIface() {
|
|
if (config_["interface"].isString()) {
|
|
ifid_ = if_nametoindex(config_["interface"].asCString());
|
|
if (ifid_ > 0) {
|
|
ifname_ = config_["interface"].asString();
|
|
return ifid_;
|
|
} else {
|
|
// Try with wildcard
|
|
struct ifaddrs *ifaddr, *ifa;
|
|
int success = getifaddrs(&ifaddr);
|
|
if (success != 0) {
|
|
return -1;
|
|
}
|
|
ifa = ifaddr;
|
|
ifid_ = -1;
|
|
while (ifa != nullptr) {
|
|
if (wildcardMatch(config_["interface"].asString(), ifa->ifa_name)) {
|
|
ifid_ = if_nametoindex(ifa->ifa_name);
|
|
break;
|
|
}
|
|
ifa = ifa->ifa_next;
|
|
}
|
|
freeifaddrs(ifaddr);
|
|
return ifid_;
|
|
}
|
|
}
|
|
ifid_ = getExternalInterface();
|
|
if (ifid_ > 0) {
|
|
char ifname[IF_NAMESIZE];
|
|
if_indextoname(ifid_, ifname);
|
|
ifname_ = ifname;
|
|
return ifid_;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
int waybar::modules::Network::handleEvents(struct nl_msg *msg, void *data) {
|
|
auto net = static_cast<waybar::modules::Network *>(data);
|
|
auto nh = nlmsg_hdr(msg);
|
|
std::lock_guard<std::mutex> lock(net->mutex_);
|
|
|
|
if (nh->nlmsg_type == RTM_NEWADDR) {
|
|
auto rtif = static_cast<struct ifinfomsg *>(NLMSG_DATA(nh));
|
|
char ifname[IF_NAMESIZE];
|
|
if_indextoname(rtif->ifi_index, ifname);
|
|
// Auto detected network can also be assigned here
|
|
if (net->ifid_ == -1 && net->checkInterface(rtif, ifname)) {
|
|
net->linked_ = true;
|
|
net->ifname_ = ifname;
|
|
net->ifid_ = rtif->ifi_index;
|
|
}
|
|
// Check for valid interface
|
|
if (rtif->ifi_index == net->ifid_) {
|
|
// Get Iface and WIFI info
|
|
net->getInterfaceAddress();
|
|
net->thread_timer_.wake_up();
|
|
}
|
|
} else if (nh->nlmsg_type == RTM_DELADDR) {
|
|
auto rtif = static_cast<struct ifinfomsg *>(NLMSG_DATA(nh));
|
|
// Check for valid interface
|
|
if (rtif->ifi_index == net->ifid_) {
|
|
net->ipaddr_.clear();
|
|
net->netmask_.clear();
|
|
net->cidr_ = 0;
|
|
net->dp.emit();
|
|
}
|
|
} else if (nh->nlmsg_type < RTM_NEWADDR) {
|
|
auto rtif = static_cast<struct ifinfomsg *>(NLMSG_DATA(nh));
|
|
char ifname[IF_NAMESIZE];
|
|
if_indextoname(rtif->ifi_index, ifname);
|
|
// Check for valid interface
|
|
if (rtif->ifi_flags & IFF_RUNNING && net->checkInterface(rtif, ifname)) {
|
|
net->linked_ = true;
|
|
net->ifname_ = ifname;
|
|
net->ifid_ = rtif->ifi_index;
|
|
net->dp.emit();
|
|
} else if (rtif->ifi_index == net->ifid_) {
|
|
net->linked_ = false;
|
|
net->ifname_.clear();
|
|
net->ifid_ = -1;
|
|
net->essid_.clear();
|
|
net->signal_strength_dbm_ = 0;
|
|
net->signal_strength_ = 0;
|
|
net->frequency_ = 0;
|
|
// Check for a new interface and get info
|
|
auto new_iface = net->getPreferredIface();
|
|
if (new_iface != -1) {
|
|
net->getInterfaceAddress();
|
|
net->thread_timer_.wake_up();
|
|
} else {
|
|
net->dp.emit();
|
|
}
|
|
}
|
|
}
|
|
return NL_SKIP;
|
|
}
|
|
|
|
int waybar::modules::Network::handleScan(struct nl_msg *msg, void *data) {
|
|
auto net = static_cast<waybar::modules::Network *>(data);
|
|
auto gnlh = static_cast<genlmsghdr *>(nlmsg_data(nlmsg_hdr(msg)));
|
|
struct nlattr * tb[NL80211_ATTR_MAX + 1];
|
|
struct nlattr * bss[NL80211_BSS_MAX + 1];
|
|
struct nla_policy bss_policy[NL80211_BSS_MAX + 1]{};
|
|
bss_policy[NL80211_BSS_TSF].type = NLA_U64;
|
|
bss_policy[NL80211_BSS_FREQUENCY].type = NLA_U32;
|
|
bss_policy[NL80211_BSS_BSSID].type = NLA_UNSPEC;
|
|
bss_policy[NL80211_BSS_BEACON_INTERVAL].type = NLA_U16;
|
|
bss_policy[NL80211_BSS_CAPABILITY].type = NLA_U16;
|
|
bss_policy[NL80211_BSS_INFORMATION_ELEMENTS].type = NLA_UNSPEC;
|
|
bss_policy[NL80211_BSS_SIGNAL_MBM].type = NLA_U32;
|
|
bss_policy[NL80211_BSS_SIGNAL_UNSPEC].type = NLA_U8;
|
|
bss_policy[NL80211_BSS_STATUS].type = NLA_U32;
|
|
|
|
if (nla_parse(
|
|
tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), nullptr) < 0) {
|
|
return NL_SKIP;
|
|
}
|
|
if (tb[NL80211_ATTR_BSS] == nullptr) {
|
|
return NL_SKIP;
|
|
}
|
|
if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS], bss_policy) != 0) {
|
|
return NL_SKIP;
|
|
}
|
|
if (!net->associatedOrJoined(bss)) {
|
|
return NL_SKIP;
|
|
}
|
|
net->parseEssid(bss);
|
|
net->parseSignal(bss);
|
|
net->parseFreq(bss);
|
|
return NL_SKIP;
|
|
}
|
|
|
|
void waybar::modules::Network::parseEssid(struct nlattr **bss) {
|
|
essid_.clear();
|
|
if (bss[NL80211_BSS_INFORMATION_ELEMENTS] != nullptr) {
|
|
auto ies = static_cast<char *>(nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]));
|
|
auto ies_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
|
|
const auto hdr_len = 2;
|
|
while (ies_len > hdr_len && ies[0] != 0) {
|
|
ies_len -= ies[1] + hdr_len;
|
|
ies += ies[1] + hdr_len;
|
|
}
|
|
if (ies_len > hdr_len && ies_len > ies[1] + hdr_len) {
|
|
auto essid_begin = ies + hdr_len;
|
|
auto essid_end = essid_begin + ies[1];
|
|
std::string essid_raw;
|
|
std::copy(essid_begin, essid_end, std::back_inserter(essid_raw));
|
|
essid_ = Glib::Markup::escape_text(essid_raw);
|
|
}
|
|
}
|
|
}
|
|
|
|
void waybar::modules::Network::parseSignal(struct nlattr **bss) {
|
|
if (bss[NL80211_BSS_SIGNAL_MBM] != nullptr) {
|
|
// signalstrength in dBm from mBm
|
|
signal_strength_dbm_ = nla_get_s32(bss[NL80211_BSS_SIGNAL_MBM]) / 100;
|
|
|
|
// WiFi-hardware usually operates in the range -90 to -20dBm.
|
|
const int hardwareMax = -20;
|
|
const int hardwareMin = -90;
|
|
signal_strength_ =
|
|
((signal_strength_dbm_ - hardwareMin) / double{hardwareMax - hardwareMin}) * 100;
|
|
}
|
|
if (bss[NL80211_BSS_SIGNAL_UNSPEC] != nullptr) {
|
|
signal_strength_ = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
|
|
}
|
|
}
|
|
|
|
void waybar::modules::Network::parseFreq(struct nlattr **bss) {
|
|
if (bss[NL80211_BSS_FREQUENCY] != nullptr) {
|
|
// in MHz
|
|
frequency_ = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
|
|
}
|
|
}
|
|
|
|
bool waybar::modules::Network::associatedOrJoined(struct nlattr **bss) {
|
|
if (bss[NL80211_BSS_STATUS] == nullptr) {
|
|
return false;
|
|
}
|
|
auto status = nla_get_u32(bss[NL80211_BSS_STATUS]);
|
|
switch (status) {
|
|
case NL80211_BSS_STATUS_ASSOCIATED:
|
|
case NL80211_BSS_STATUS_IBSS_JOINED:
|
|
case NL80211_BSS_STATUS_AUTHENTICATED:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
auto waybar::modules::Network::getInfo() -> void {
|
|
struct nl_msg *nl_msg = nlmsg_alloc();
|
|
if (nl_msg == nullptr) {
|
|
return;
|
|
}
|
|
if (genlmsg_put(
|
|
nl_msg, NL_AUTO_PORT, NL_AUTO_SEQ, nl80211_id_, 0, NLM_F_DUMP, NL80211_CMD_GET_SCAN, 0) ==
|
|
nullptr ||
|
|
nla_put_u32(nl_msg, NL80211_ATTR_IFINDEX, ifid_) < 0) {
|
|
nlmsg_free(nl_msg);
|
|
return;
|
|
}
|
|
nl_send_sync(sock_, nl_msg);
|
|
}
|
|
|
|
// https://gist.github.com/rressi/92af77630faf055934c723ce93ae2495
|
|
bool waybar::modules::Network::wildcardMatch(const std::string &pattern, const std::string &text) {
|
|
auto P = int(pattern.size());
|
|
auto T = int(text.size());
|
|
|
|
auto p = 0, fallback_p = -1;
|
|
auto t = 0, fallback_t = -1;
|
|
|
|
while (t < T) {
|
|
// Wildcard match:
|
|
if (p < P && pattern[p] == '*') {
|
|
fallback_p = p++; // starting point after failures
|
|
fallback_t = t; // starting point after failures
|
|
}
|
|
|
|
// Simple match:
|
|
else if (p < P && (pattern[p] == '?' || pattern[p] == text[t])) {
|
|
p++;
|
|
t++;
|
|
}
|
|
|
|
// Failure, fall back just after last matched '*':
|
|
else if (fallback_p >= 0) {
|
|
p = fallback_p + 1; // position just after last matched '*"
|
|
t = ++fallback_t; // re-try to match text from here
|
|
}
|
|
|
|
// There were no '*' before, so we fail here:
|
|
else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Consume all '*' at the end of pattern:
|
|
while (p < P && pattern[p] == '*') p++;
|
|
|
|
return p == P;
|
|
}
|