blankie
/
Waybar
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
Waybar/src/modules/network.cpp

888 lines
28 KiB
C++
Raw Blame History

#include "modules/network.hpp"
#include <spdlog/spdlog.h>
#include <sys/eventfd.h>
#include <linux/if.h>
#include <fstream>
#include <cassert>
#include <optional>
#include "util/format.hpp"
#ifdef WANT_RFKILL
#include "util/rfkill.hpp"
#endif
namespace {
using namespace waybar::util;
constexpr const char *NETSTAT_FILE =
"/proc/net/netstat"; // std::ifstream does not take std::string_view as param
constexpr std::string_view BANDWIDTH_CATEGORY = "IpExt";
constexpr std::string_view BANDWIDTH_DOWN_TOTAL_KEY = "InOctets";
constexpr std::string_view BANDWIDTH_UP_TOTAL_KEY = "OutOctets";
constexpr const char *DEFAULT_FORMAT = "{ifname}";
std::ifstream netstat(NETSTAT_FILE);
std::optional<unsigned long long> read_netstat(std::string_view category, std::string_view key) {
if (!netstat) {
spdlog::warn("Failed to open netstat file {}", NETSTAT_FILE);
return {};
}
netstat.seekg(std::ios_base::beg);
// finding corresponding line (category)
// looks into the file for the first line starting by the 'category' string
auto starts_with = [](const std::string &str, std::string_view start) {
return start == std::string_view{str.data(), std::min(str.size(), start.size())};
};
std::string read;
while (std::getline(netstat, read) && !starts_with(read, category))
;
if (!starts_with(read, category)) {
spdlog::warn("Category '{}' not found in netstat file {}", category, NETSTAT_FILE);
return {};
}
// finding corresponding column (key)
// looks into the fetched line for the first word (space separated) equal to 'key'
int index = 0;
auto r_it = read.begin();
auto k_it = key.begin();
while (k_it != key.end() && r_it != read.end()) {
if (*r_it != *k_it) {
r_it = std::find(r_it, read.end(), ' ');
if (r_it != read.end()) {
++r_it;
}
k_it = key.begin();
++index;
} else {
++r_it;
++k_it;
}
}
if (r_it == read.end() && k_it != key.end()) {
spdlog::warn(
"Key '{}' not found in category '{}' of netstat file {}", key, category, NETSTAT_FILE);
return {};
}
// finally accessing value
// accesses the line right under the fetched one
std::getline(netstat, read);
assert(starts_with(read, category));
std::istringstream iss(read);
while (index--) {
std::getline(iss, read, ' ');
}
unsigned long long value;
iss >> value;
return value;
}
} // namespace
waybar::modules::Network::Network(const std::string &id, const Json::Value &config)
: ALabel(config, "network", id, DEFAULT_FORMAT, 60),
ifid_(-1),
family_(config["family"] == "ipv6" ? AF_INET6 : AF_INET),
efd_(-1),
ev_fd_(-1),
want_route_dump_(false),
want_link_dump_(false),
want_addr_dump_(false),
dump_in_progress_(false),
cidr_(0),
signal_strength_dbm_(0),
signal_strength_(0),
#ifdef WANT_RFKILL
rfkill_{RFKILL_TYPE_WLAN},
#endif
frequency_(0) {
// Start with some "text" in the module's label_, update() will then
// update it. Since the text should be different, update() will be able
// to show or hide the event_box_. This is to work around the case where
// the module start with no text, but the the event_box_ is shown.
label_.set_markup("<s></s>");
auto down_octets = read_netstat(BANDWIDTH_CATEGORY, BANDWIDTH_DOWN_TOTAL_KEY);
auto up_octets = read_netstat(BANDWIDTH_CATEGORY, BANDWIDTH_UP_TOTAL_KEY);
if (down_octets) {
bandwidth_down_total_ = *down_octets;
} else {
bandwidth_down_total_ = 0;
}
if (up_octets) {
bandwidth_up_total_ = *up_octets;
} else {
bandwidth_up_total_ = 0;
}
if (!config_["interface"].isString()) {
// "interface" isn't configure, then try to guess the external
// interface currently used for internet.
want_route_dump_ = true;
} else {
// Look for an interface that match "interface"
// and then find the address associated with it.
want_link_dump_ = true;
want_addr_dump_ = true;
}
createEventSocket();
createInfoSocket();
dp.emit();
// Ask for a dump of interfaces and then addresses to populate our
// information. First the interface dump, and once done, the callback
// will be called again which will ask for addresses dump.
askForStateDump();
worker();
}
waybar::modules::Network::~Network() {
if (ev_fd_ > -1) {
close(ev_fd_);
}
if (efd_ > -1) {
close(efd_);
}
if (ev_sock_ != nullptr) {
nl_socket_drop_membership(ev_sock_, RTNLGRP_LINK);
if (family_ == AF_INET) {
nl_socket_drop_membership(ev_sock_, RTNLGRP_IPV4_IFADDR);
} else {
nl_socket_drop_membership(ev_sock_, RTNLGRP_IPV6_IFADDR);
}
nl_close(ev_sock_);
nl_socket_free(ev_sock_);
}
if (sock_ != nullptr) {
nl_close(sock_);
nl_socket_free(sock_);
}
}
void waybar::modules::Network::createEventSocket() {
ev_sock_ = nl_socket_alloc();
nl_socket_disable_seq_check(ev_sock_);
nl_socket_modify_cb(ev_sock_, NL_CB_VALID, NL_CB_CUSTOM, handleEvents, this);
nl_socket_modify_cb(ev_sock_, NL_CB_FINISH, NL_CB_CUSTOM, handleEventsDone, this);
auto groups = RTMGRP_LINK | (family_ == AF_INET ? RTMGRP_IPV4_IFADDR : RTMGRP_IPV6_IFADDR);
nl_join_groups(ev_sock_, groups); // Deprecated
if (nl_connect(ev_sock_, NETLINK_ROUTE) != 0) {
throw std::runtime_error("Can't connect network socket");
}
if (nl_socket_set_nonblocking(ev_sock_)) {
throw std::runtime_error("Can't set non-blocking on network socket");
}
nl_socket_add_membership(ev_sock_, RTNLGRP_LINK);
if (family_ == AF_INET) {
nl_socket_add_membership(ev_sock_, RTNLGRP_IPV4_IFADDR);
} else {
nl_socket_add_membership(ev_sock_, RTNLGRP_IPV6_IFADDR);
}
if (!config_["interface"].isString()) {
if (family_ == AF_INET) {
nl_socket_add_membership(ev_sock_, RTNLGRP_IPV4_ROUTE);
} else {
nl_socket_add_membership(ev_sock_, RTNLGRP_IPV6_ROUTE);
}
}
efd_ = epoll_create1(EPOLL_CLOEXEC);
if (efd_ < 0) {
throw std::runtime_error("Can't create epoll");
}
{
ev_fd_ = eventfd(0, EFD_NONBLOCK);
struct epoll_event event;
memset(&event, 0, sizeof(event));
event.events = EPOLLIN | EPOLLET;
event.data.fd = ev_fd_;
if (epoll_ctl(efd_, EPOLL_CTL_ADD, ev_fd_, &event) == -1) {
throw std::runtime_error("Can't add epoll event");
}
}
{
auto fd = nl_socket_get_fd(ev_sock_);
struct epoll_event event;
memset(&event, 0, sizeof(event));
event.events = EPOLLIN | EPOLLET | EPOLLRDHUP;
event.data.fd = fd;
if (epoll_ctl(efd_, EPOLL_CTL_ADD, fd, &event) == -1) {
throw std::runtime_error("Can't add epoll event");
}
}
}
void waybar::modules::Network::createInfoSocket() {
sock_ = nl_socket_alloc();
if (genl_connect(sock_) != 0) {
throw std::runtime_error("Can't connect to netlink socket");
}
if (nl_socket_modify_cb(sock_, NL_CB_VALID, NL_CB_CUSTOM, handleScan, this) < 0) {
throw std::runtime_error("Can't set callback");
}
nl80211_id_ = genl_ctrl_resolve(sock_, "nl80211");
if (nl80211_id_ < 0) {
spdlog::warn("Can't resolve nl80211 interface");
}
}
void waybar::modules::Network::worker() {
// update via here not working
thread_timer_ = [this] {
{
std::lock_guard<std::mutex> lock(mutex_);
if (ifid_ > 0) {
getInfo();
dp.emit();
}
}
thread_timer_.sleep_for(interval_);
};
#ifdef WANT_RFKILL
rfkill_.on_update.connect([this](auto &) {
/* If we are here, it's likely that the network thread already holds the mutex and will be
* holding it for a next few seconds.
* Let's delegate the update to the timer thread instead of blocking the main thread.
*/
thread_timer_.wake_up();
});
#else
spdlog::warn("Waybar has been built without rfkill support.");
#endif
thread_ = [this] {
std::array<struct epoll_event, EPOLL_MAX> events{};
int ec = epoll_wait(efd_, events.data(), EPOLL_MAX, -1);
if (ec > 0) {
for (auto i = 0; i < ec; i++) {
if (events[i].data.fd == nl_socket_get_fd(ev_sock_)) {
int rc = 0;
// Read as many message as possible, until the socket blocks
while (true) {
errno = 0;
rc = nl_recvmsgs_default(ev_sock_);
if (rc == -NLE_AGAIN || errno == EAGAIN) {
rc = 0;
break;
}
}
if (rc < 0) {
spdlog::error("nl_recvmsgs_default error: {}", nl_geterror(-rc));
thread_.stop();
break;
}
} else {
thread_.stop();
break;
}
}
}
};
}
const std::string waybar::modules::Network::getNetworkState() const {
if (ifid_ == -1) {
#ifdef WANT_RFKILL
if (rfkill_.getState())
return "disabled";
#endif
return "disconnected";
}
if (!carrier_) return "disconnected";
if (ipaddr_.empty()) return "linked";
if (essid_.empty()) return "ethernet";
return "wifi";
}
auto waybar::modules::Network::update() -> void {
std::lock_guard<std::mutex> lock(mutex_);
std::string tooltip_format;
auto down_octets = read_netstat(BANDWIDTH_CATEGORY, BANDWIDTH_DOWN_TOTAL_KEY);
auto up_octets = read_netstat(BANDWIDTH_CATEGORY, BANDWIDTH_UP_TOTAL_KEY);
unsigned long long bandwidth_down = 0;
if (down_octets) {
bandwidth_down = *down_octets - bandwidth_down_total_;
bandwidth_down_total_ = *down_octets;
}
unsigned long long bandwidth_up = 0;
if (up_octets) {
bandwidth_up = *up_octets - bandwidth_up_total_;
bandwidth_up_total_ = *up_octets;
}
if (!alt_) {
auto state = getNetworkState();
if (!state_.empty() && label_.get_style_context()->has_class(state_)) {
label_.get_style_context()->remove_class(state_);
}
if (config_["format-" + state].isString()) {
default_format_ = config_["format-" + state].asString();
} else if (config_["format"].isString()) {
default_format_ = config_["format"].asString();
} else {
default_format_ = DEFAULT_FORMAT;
}
if (config_["tooltip-format-" + state].isString()) {
tooltip_format = config_["tooltip-format-" + state].asString();
}
if (!label_.get_style_context()->has_class(state)) {
label_.get_style_context()->add_class(state);
}
format_ = default_format_;
state_ = state;
}
getState(signal_strength_);
auto text = fmt::format(
format_,
fmt::arg("essid", essid_),
fmt::arg("signaldBm", signal_strength_dbm_),
fmt::arg("signalStrength", signal_strength_),
fmt::arg("ifname", ifname_),
fmt::arg("netmask", netmask_),
fmt::arg("ipaddr", ipaddr_),
fmt::arg("cidr", cidr_),
fmt::arg("frequency", frequency_),
fmt::arg("icon", getIcon(signal_strength_, state_)),
fmt::arg("bandwidthDownBits", pow_format(bandwidth_down * 8ull / interval_.count(), "b/s")),
fmt::arg("bandwidthUpBits", pow_format(bandwidth_up * 8ull / interval_.count(), "b/s")),
fmt::arg("bandwidthDownOctets", pow_format(bandwidth_down / interval_.count(), "o/s")),
fmt::arg("bandwidthUpOctets", pow_format(bandwidth_up / interval_.count(), "o/s")));
if (text.compare(label_.get_label()) != 0) {
label_.set_markup(text);
if (text.empty()) {
event_box_.hide();
} else {
event_box_.show();
}
}
if (tooltipEnabled()) {
if (tooltip_format.empty() && config_["tooltip-format"].isString()) {
tooltip_format = config_["tooltip-format"].asString();
}
if (!tooltip_format.empty()) {
auto tooltip_text = fmt::format(
tooltip_format,
fmt::arg("essid", essid_),
fmt::arg("signaldBm", signal_strength_dbm_),
fmt::arg("signalStrength", signal_strength_),
fmt::arg("ifname", ifname_),
fmt::arg("netmask", netmask_),
fmt::arg("ipaddr", ipaddr_),
fmt::arg("cidr", cidr_),
fmt::arg("frequency", frequency_),
fmt::arg("icon", getIcon(signal_strength_, state_)),
fmt::arg("bandwidthDownBits",
pow_format(bandwidth_down * 8ull / interval_.count(), "b/s")),
fmt::arg("bandwidthUpBits", pow_format(bandwidth_up * 8ull / interval_.count(), "b/s")),
fmt::arg("bandwidthDownOctets", pow_format(bandwidth_down / interval_.count(), "o/s")),
fmt::arg("bandwidthUpOctets", pow_format(bandwidth_up / interval_.count(), "o/s")));
if (label_.get_tooltip_text() != tooltip_text) {
label_.set_tooltip_text(tooltip_text);
}
} else if (label_.get_tooltip_text() != text) {
label_.set_tooltip_text(text);
}
}
// Call parent update
ALabel::update();
}
bool waybar::modules::Network::checkInterface(std::string name) {
if (config_["interface"].isString()) {
return config_["interface"].asString() == name ||
wildcardMatch(config_["interface"].asString(), name);
}
return false;
}
void waybar::modules::Network::clearIface() {
ifid_ = -1;
ifname_.clear();
essid_.clear();
ipaddr_.clear();
netmask_.clear();
carrier_ = false;
cidr_ = 0;
signal_strength_dbm_ = 0;
signal_strength_ = 0;
frequency_ = 0;
}
int waybar::modules::Network::handleEvents(struct nl_msg *msg, void *data) {
auto net = static_cast<waybar::modules::Network *>(data);
std::lock_guard<std::mutex> lock(net->mutex_);
auto nh = nlmsg_hdr(msg);
bool is_del_event = false;
switch (nh->nlmsg_type) {
case RTM_DELLINK:
is_del_event = true;
case RTM_NEWLINK: {
struct ifinfomsg *ifi = static_cast<struct ifinfomsg *>(NLMSG_DATA(nh));
ssize_t attrlen = IFLA_PAYLOAD(nh);
struct rtattr *ifla = IFLA_RTA(ifi);
const char *ifname = NULL;
size_t ifname_len = 0;
std::optional<bool> carrier;
if (net->ifid_ != -1 && ifi->ifi_index != net->ifid_) {
return NL_OK;
}
// Check if the interface goes "down" and if we want to detect the
// external interface.
if (net->ifid_ != -1 && !(ifi->ifi_flags & IFF_UP)
&& !net->config_["interface"].isString()) {
// The current interface is now down, all the routes associated with
// it have been deleted, so start looking for a new default route.
spdlog::debug("network: if{} down", net->ifid_);
net->clearIface();
net->dp.emit();
net->want_route_dump_ = true;
net->askForStateDump();
return NL_OK;
}
for (; RTA_OK(ifla, attrlen); ifla = RTA_NEXT(ifla, attrlen)) {
switch (ifla->rta_type) {
case IFLA_IFNAME:
ifname = static_cast<const char *>(RTA_DATA(ifla));
ifname_len = RTA_PAYLOAD(ifla) - 1; // minus \0
break;
case IFLA_CARRIER: {
carrier = *(char*)RTA_DATA(ifla) == 1;
break;
}
}
}
if (!is_del_event && ifi->ifi_index == net->ifid_) {
// Update inferface information
if (net->ifname_.empty() && ifname != NULL) {
std::string new_ifname (ifname, ifname_len);
net->ifname_ = new_ifname;
}
if (carrier.has_value()) {
if (net->carrier_ != *carrier) {
if (*carrier) {
// Ask for WiFi information
net->thread_timer_.wake_up();
} else {
// clear state related to WiFi connection
net->essid_.clear();
net->signal_strength_dbm_ = 0;
net->signal_strength_ = 0;
net->frequency_ = 0;
}
}
net->carrier_ = carrier.value();
}
} else if (!is_del_event && net->ifid_ == -1) {
// Checking if it's an interface we care about.
std::string new_ifname (ifname, ifname_len);
if (net->checkInterface(new_ifname)) {
spdlog::debug("network: selecting new interface {}/{}", new_ifname, ifi->ifi_index);
net->ifname_ = new_ifname;
net->ifid_ = ifi->ifi_index;
if (carrier.has_value()) {
net->carrier_ = carrier.value();
}
net->thread_timer_.wake_up();
/* An address for this new interface should be received via an
* RTM_NEWADDR event either because we ask for a dump of both links
* and addrs, or because this interface has just been created and
* the addr will be sent after the RTM_NEWLINK event.
* So we don't need to do anything. */
}
} else if (is_del_event && net->ifid_ >= 0) {
// Our interface has been deleted, start looking/waiting for one we care.
spdlog::debug("network: interface {}/{} deleted", net->ifname_, net->ifid_);
net->clearIface();
net->dp.emit();
}
break;
}
case RTM_DELADDR:
is_del_event = true;
case RTM_NEWADDR: {
struct ifaddrmsg *ifa = static_cast<struct ifaddrmsg *>(NLMSG_DATA(nh));
ssize_t attrlen = IFA_PAYLOAD(nh);
struct rtattr *ifa_rta = IFA_RTA(ifa);
if ((int)ifa->ifa_index != net->ifid_) {
return NL_OK;
}
if (ifa->ifa_family != net->family_) {
return NL_OK;
}
// We ignore address mark as scope for the link or host,
// which should leave scope global addresses.
if (ifa->ifa_scope >= RT_SCOPE_LINK) {
return NL_OK;
}
for (; RTA_OK(ifa_rta, attrlen); ifa_rta = RTA_NEXT(ifa_rta, attrlen)) {
switch (ifa_rta->rta_type) {
case IFA_ADDRESS: {
char ipaddr[INET6_ADDRSTRLEN];
if (!is_del_event) {
net->ipaddr_ = inet_ntop(ifa->ifa_family, RTA_DATA(ifa_rta),
ipaddr, sizeof (ipaddr));
net->cidr_ = ifa->ifa_prefixlen;
switch (ifa->ifa_family) {
case AF_INET: {
struct in_addr netmask;
netmask.s_addr = htonl(~0 << (32 - ifa->ifa_prefixlen));
net->netmask_ = inet_ntop(ifa->ifa_family, &netmask,
ipaddr, sizeof (ipaddr));
}
case AF_INET6: {
struct in6_addr netmask;
for (int i = 0; i < 16; i++) {
int v = (i + 1) * 8 - ifa->ifa_prefixlen;
if (v < 0) v = 0;
if (v > 8) v = 8;
netmask.s6_addr[i] = ~0 << v;
}
net->netmask_ = inet_ntop(ifa->ifa_family, &netmask,
ipaddr, sizeof (ipaddr));
}
}
spdlog::debug("network: {}, new addr {}/{}", net->ifname_, net->ipaddr_, net->cidr_);
} else {
net->ipaddr_.clear();
net->cidr_ = 0;
net->netmask_.clear();
spdlog::debug("network: {} addr deleted {}/{}",
net->ifname_,
inet_ntop(ifa->ifa_family, RTA_DATA(ifa_rta),
ipaddr, sizeof (ipaddr)),
ifa->ifa_prefixlen);
}
net->dp.emit();
break;
}
}
}
break;
}
case RTM_DELROUTE:
is_del_event = true;
case RTM_NEWROUTE: {
// Based on https://gist.github.com/Yawning/c70d804d4b8ae78cc698
// to find the interface used to reach the outside world
struct rtmsg *rtm = static_cast<struct rtmsg *>(NLMSG_DATA(nh));
ssize_t attrlen = RTM_PAYLOAD(nh);
struct rtattr *attr = RTM_RTA(rtm);
bool has_gateway = false;
bool has_destination = false;
int temp_idx = -1;
uint32_t priority = 0;
/* Find the message(s) concerting the main routing table, each message
* corresponds to a single routing table entry.
*/
if (rtm->rtm_table != RT_TABLE_MAIN) {
return NL_OK;
}
/* Parse all the attributes for a single routing table entry. */
for (; RTA_OK(attr, attrlen); attr = RTA_NEXT(attr, attrlen)) {
/* Determine if this routing table entry corresponds to the default
* route by seeing if it has a gateway, and if a destination addr is
* set, that it is all 0s.
*/
switch(attr->rta_type) {
case RTA_GATEWAY:
/* The gateway of the route.
*
* If someone every needs to figure out the gateway address as well,
* it's here as the attribute payload.
*/
has_gateway = true;
break;
case RTA_DST: {
/* The destination address.
* Should be either missing, or maybe all 0s. Accept both.
*/
const uint32_t nr_zeroes = (net->family_ == AF_INET) ? 4 : 16;
unsigned char c = 0;
size_t dstlen = RTA_PAYLOAD(attr);
if (dstlen != nr_zeroes) {
break;
}
for (uint32_t i = 0; i < dstlen; i += 1) {
c |= *((unsigned char *)RTA_DATA(attr) + i);
}
has_destination = (c == 0);
break;
}
case RTA_OIF:
/* The output interface index. */
temp_idx = *static_cast<int *>(RTA_DATA(attr));
break;
case RTA_PRIORITY:
priority = *(uint32_t*)RTA_DATA(attr);
break;
default:
break;
}
}
// Check if we have a default route.
if (has_gateway && !has_destination && temp_idx != -1) {
// Check if this is the first default route we see, or if this new
// route have a higher priority.
if (!is_del_event && ((net->ifid_ == -1) || (priority < net->route_priority))) {
// Clear if's state for the case were there is a higher priority
// route on a different interface.
net->clearIface();
net->ifid_ = temp_idx;
net->route_priority = priority;
spdlog::debug("network: new default route via if{} metric {}", temp_idx, priority);
/* Ask ifname associated with temp_idx as well as carrier status */
struct ifinfomsg ifinfo_hdr = {
.ifi_family = AF_UNSPEC,
.ifi_index = temp_idx,
};
int err;
err = nl_send_simple(net->ev_sock_, RTM_GETLINK, NLM_F_REQUEST,
&ifinfo_hdr, sizeof (ifinfo_hdr));
if (err < 0) {
spdlog::error("network: failed to ask link info: {}", err);
/* Ask for a dump of all links instead */
net->want_link_dump_ = true;
}
/* Also ask for the address. Asking for a addresses of a specific
* interface doesn't seems to work so ask for a dump of all
* addresses. */
net->want_addr_dump_ = true;
net->askForStateDump();
net->thread_timer_.wake_up();
} else if (is_del_event && temp_idx == net->ifid_
&& net->route_priority == priority) {
spdlog::debug("network: default route deleted {}/if{} metric {}",
net->ifname_, temp_idx, priority);
net->clearIface();
net->dp.emit();
/* Ask for a dump of all routes in case another one is already
* setup. If there's none, there'll be an event with new one
* later. */
net->want_route_dump_ = true;
net->askForStateDump();
}
}
break;
}
}
return NL_OK;
}
void waybar::modules::Network::askForStateDump(void) {
/* We need to wait until the current dump is done before sending new
* messages. handleEventsDone() is called when a dump is done. */
if (dump_in_progress_)
return;
struct rtgenmsg rt_hdr = {
.rtgen_family = AF_UNSPEC,
};
if (want_route_dump_) {
rt_hdr.rtgen_family = family_;
nl_send_simple(ev_sock_, RTM_GETROUTE, NLM_F_DUMP,
&rt_hdr, sizeof (rt_hdr));
want_route_dump_ = false;
dump_in_progress_ = true;
} else if (want_link_dump_) {
nl_send_simple(ev_sock_, RTM_GETLINK, NLM_F_DUMP,
&rt_hdr, sizeof (rt_hdr));
want_link_dump_ = false;
dump_in_progress_ = true;
} else if (want_addr_dump_) {
rt_hdr.rtgen_family = family_;
nl_send_simple(ev_sock_, RTM_GETADDR, NLM_F_DUMP,
&rt_hdr, sizeof (rt_hdr));
want_addr_dump_ = false;
dump_in_progress_ = true;
}
}
int waybar::modules::Network::handleEventsDone(struct nl_msg *msg, void *data) {
auto net = static_cast<waybar::modules::Network *>(data);
net->dump_in_progress_ = false;
net->askForStateDump();
return NL_OK;
}
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_OK;
}
void waybar::modules::Network::parseEssid(struct nlattr **bss) {
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;
const int strength =
((signal_strength_dbm_ - hardwareMin) / double{hardwareMax - hardwareMin}) * 100;
signal_strength_ = std::clamp(strength, 0, 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) const {
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;
}
Reference in New Issue View Git Blame Copy Permalink