Merge pull request #1106 from tperard/network-module-reword
Network module rework
This commit is contained in:
Alex
GitHub
commit
f78a802d11
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@ -2,9 +2,7 @@
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#include <arpa/inet.h>
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#include <fmt/format.h>
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#include <ifaddrs.h>
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#include <linux/nl80211.h>
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#include <net/if.h>
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#include <netlink/genl/ctrl.h>
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#include <netlink/genl/genl.h>
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#include <netlink/netlink.h>
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@ -28,23 +26,20 @@ class Network : public ALabel {
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static const uint8_t EPOLL_MAX = 200;
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static int handleEvents(struct nl_msg*, void*);
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static int handleEventsDone(struct nl_msg*, void*);
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static int handleScan(struct nl_msg*, void*);
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void askForStateDump(void);
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void worker();
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void createInfoSocket();
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void createEventSocket();
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int getExternalInterface(int skip_idx = -1) const;
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void getInterfaceAddress();
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int netlinkRequest(void*, uint32_t, uint32_t groups = 0) const;
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int netlinkResponse(void*, uint32_t, uint32_t groups = 0) const;
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void parseEssid(struct nlattr**);
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void parseSignal(struct nlattr**);
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void parseFreq(struct nlattr**);
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bool associatedOrJoined(struct nlattr**);
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bool checkInterface(struct ifinfomsg* rtif, std::string name);
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int getPreferredIface(int skip_idx = -1, bool wait = true) const;
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bool checkInterface(std::string name);
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auto getInfo() -> void;
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void checkNewInterface(struct ifinfomsg* rtif);
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const std::string getNetworkState() const;
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void clearIface();
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bool wildcardMatch(const std::string& pattern, const std::string& text) const;
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@ -59,11 +54,17 @@ class Network : public ALabel {
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int nl80211_id_;
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std::mutex mutex_;
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bool want_route_dump_;
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bool want_link_dump_;
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bool want_addr_dump_;
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bool dump_in_progress_;
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unsigned long long bandwidth_down_total_;
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unsigned long long bandwidth_up_total_;
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std::string state_;
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std::string essid_;
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bool carrier_;
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std::string ifname_;
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std::string ipaddr_;
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std::string netmask_;
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@ -86,13 +86,24 @@ waybar::modules::Network::Network(const std::string &id, const Json::Value &conf
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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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want_route_dump_(false),
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want_link_dump_(false),
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want_addr_dump_(false),
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dump_in_progress_(false),
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cidr_(0),
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signal_strength_dbm_(0),
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signal_strength_(0),
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#ifdef WANT_RFKILL
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rfkill_{RFKILL_TYPE_WLAN},
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#endif
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frequency_(0) {
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// Start with some "text" in the module's label_, update() will then
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// update it. Since the text should be different, update() will be able
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// to show or hide the event_box_. This is to work around the case where
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// the module start with no text, but the the event_box_ is shown.
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label_.set_markup("<s></s>");
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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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@ -107,17 +118,25 @@ waybar::modules::Network::Network(const std::string &id, const Json::Value &conf
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bandwidth_up_total_ = 0;
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}
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if (!config_["interface"].isString()) {
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// "interface" isn't configure, then try to guess the external
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// interface currently used for internet.
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want_route_dump_ = true;
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} else {
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// Look for an interface that match "interface"
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// and then find the address associated with it.
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want_link_dump_ = true;
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want_addr_dump_ = true;
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}
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createEventSocket();
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createInfoSocket();
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auto default_iface = getPreferredIface(-1, false);
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if (default_iface != -1) {
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ifid_ = default_iface;
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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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// Ask for a dump of interfaces and then addresses to populate our
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// information. First the interface dump, and once done, the callback
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// will be called again which will ask for addresses dump.
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askForStateDump();
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worker();
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}
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@ -148,17 +167,29 @@ void waybar::modules::Network::createEventSocket() {
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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_socket_modify_cb(ev_sock_, NL_CB_FINISH, NL_CB_CUSTOM, handleEventsDone, this);
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auto groups = RTMGRP_LINK | (family_ == AF_INET ? RTMGRP_IPV4_IFADDR : RTMGRP_IPV6_IFADDR);
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nl_join_groups(ev_sock_, groups); // Deprecated
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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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if (nl_socket_set_nonblocking(ev_sock_)) {
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throw std::runtime_error("Can't set non-blocking on network socket");
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}
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nl_socket_add_membership(ev_sock_, RTNLGRP_LINK);
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if (family_ == AF_INET) {
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nl_socket_add_membership(ev_sock_, RTNLGRP_IPV4_IFADDR);
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} else {
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nl_socket_add_membership(ev_sock_, RTNLGRP_IPV6_IFADDR);
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}
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if (!config_["interface"].isString()) {
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if (family_ == AF_INET) {
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nl_socket_add_membership(ev_sock_, RTNLGRP_IPV4_ROUTE);
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} else {
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nl_socket_add_membership(ev_sock_, RTNLGRP_IPV6_ROUTE);
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}
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}
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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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@ -228,7 +259,23 @@ void waybar::modules::Network::worker() {
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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_) || nl_recvmsgs_default(ev_sock_) < 0) {
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if (events[i].data.fd == nl_socket_get_fd(ev_sock_)) {
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int rc = 0;
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// Read as many message as possible, until the socket blocks
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while (true) {
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errno = 0;
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rc = nl_recvmsgs_default(ev_sock_);
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if (rc == -NLE_AGAIN || errno == EAGAIN) {
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rc = 0;
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break;
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}
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}
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if (rc < 0) {
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spdlog::error("nl_recvmsgs_default error: {}", nl_geterror(-rc));
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thread_.stop();
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break;
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}
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} else {
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thread_.stop();
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break;
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}
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@ -245,6 +292,7 @@ const std::string waybar::modules::Network::getNetworkState() const {
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#endif
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return "disconnected";
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}
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if (!carrier_) return "disconnected";
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if (ipaddr_.empty()) return "linked";
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if (essid_.empty()) return "ethernet";
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return "wifi";
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@ -342,349 +390,312 @@ auto waybar::modules::Network::update() -> void {
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ALabel::update();
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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(int skip_idx) const {
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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 && temp_idx != skip_idx) {
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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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return ifidx;
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}
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void waybar::modules::Network::getInterfaceAddress() {
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struct ifaddrs *ifaddr, *ifa;
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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;
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while (ifa != nullptr) {
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if (ifa->ifa_addr != nullptr && ifa->ifa_addr->sa_family == family_ &&
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ifa->ifa_name == ifname_) {
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char ipaddr[INET6_ADDRSTRLEN];
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char netmask[INET6_ADDRSTRLEN];
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unsigned int cidr = 0;
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if (family_ == AF_INET) {
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ipaddr_ = inet_ntop(AF_INET,
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&reinterpret_cast<struct sockaddr_in *>(ifa->ifa_addr)->sin_addr,
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ipaddr,
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INET_ADDRSTRLEN);
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auto net_addr = reinterpret_cast<struct sockaddr_in *>(ifa->ifa_netmask);
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netmask_ = inet_ntop(AF_INET, &net_addr->sin_addr, netmask, INET_ADDRSTRLEN);
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unsigned int cidrRaw = net_addr->sin_addr.s_addr;
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while (cidrRaw) {
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cidr += cidrRaw & 1;
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cidrRaw >>= 1;
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}
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} else {
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ipaddr_ = inet_ntop(AF_INET6,
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&reinterpret_cast<struct sockaddr_in6 *>(ifa->ifa_addr)->sin6_addr,
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ipaddr,
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INET6_ADDRSTRLEN);
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auto net_addr = reinterpret_cast<struct sockaddr_in6 *>(ifa->ifa_netmask);
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netmask_ = inet_ntop(AF_INET6, &net_addr->sin6_addr, netmask, INET6_ADDRSTRLEN);
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for (size_t i = 0; i < sizeof(net_addr->sin6_addr.s6_addr); ++i) {
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unsigned char cidrRaw = net_addr->sin6_addr.s6_addr[i];
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while (cidrRaw) {
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cidr += cidrRaw & 1;
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cidrRaw >>= 1;
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}
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}
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}
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cidr_ = cidr;
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break;
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}
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ifa = ifa->ifa_next;
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}
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freeifaddrs(ifaddr);
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}
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int waybar::modules::Network::netlinkRequest(void *req, uint32_t reqlen, uint32_t groups) const {
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struct sockaddr_nl sa = {};
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sa.nl_family = AF_NETLINK;
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sa.nl_groups = groups;
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struct iovec iov = {req, reqlen};
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struct msghdr msg = {
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.msg_name = &sa,
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.msg_namelen = sizeof(sa),
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.msg_iov = &iov,
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.msg_iovlen = 1,
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};
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return sendmsg(nl_socket_get_fd(ev_sock_), &msg, 0);
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}
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int waybar::modules::Network::netlinkResponse(void *resp, uint32_t resplen, uint32_t groups) const {
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struct sockaddr_nl sa = {};
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sa.nl_family = AF_NETLINK;
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sa.nl_groups = groups;
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struct iovec iov = {resp, resplen};
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struct msghdr msg = {
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.msg_name = &sa,
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.msg_namelen = sizeof(sa),
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.msg_iov = &iov,
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.msg_iovlen = 1,
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};
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auto ret = recvmsg(nl_socket_get_fd(ev_sock_), &msg, 0);
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if (msg.msg_flags & MSG_TRUNC) {
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return -1;
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}
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return ret;
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}
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bool waybar::modules::Network::checkInterface(struct ifinfomsg *rtif, std::string name) {
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bool waybar::modules::Network::checkInterface(std::string name) {
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if (config_["interface"].isString()) {
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return config_["interface"].asString() == name ||
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wildcardMatch(config_["interface"].asString(), name);
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}
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// getExternalInterface may need some delay to detect external interface
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for (uint8_t tries = 0; tries < MAX_RETRY; tries += 1) {
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auto external_iface = getExternalInterface();
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if (external_iface > 0) {
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return external_iface == rtif->ifi_index;
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}
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std::this_thread::sleep_for(std::chrono::milliseconds(500));
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}
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return false;
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}
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int waybar::modules::Network::getPreferredIface(int skip_idx, bool wait) const {
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int ifid = -1;
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if (config_["interface"].isString()) {
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ifid = if_nametoindex(config_["interface"].asCString());
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if (ifid > 0) {
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return ifid;
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} else {
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// Try with wildcard
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struct ifaddrs *ifaddr, *ifa;
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int success = getifaddrs(&ifaddr);
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if (success != 0) {
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return -1;
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}
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ifa = ifaddr;
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ifid = -1;
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while (ifa != nullptr) {
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if (wildcardMatch(config_["interface"].asString(), ifa->ifa_name)) {
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ifid = if_nametoindex(ifa->ifa_name);
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break;
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}
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ifa = ifa->ifa_next;
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}
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freeifaddrs(ifaddr);
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return ifid;
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}
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}
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// getExternalInterface may need some delay to detect external interface
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for (uint8_t tries = 0; tries < MAX_RETRY; tries += 1) {
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ifid = getExternalInterface(skip_idx);
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if (ifid > 0) {
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return ifid;
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}
|
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if (wait) {
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std::this_thread::sleep_for(std::chrono::milliseconds(500));
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}
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}
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return -1;
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}
|
||||
|
||||
void waybar::modules::Network::clearIface() {
|
||||
ifid_ = -1;
|
||||
essid_.clear();
|
||||
ipaddr_.clear();
|
||||
netmask_.clear();
|
||||
carrier_ = false;
|
||||
cidr_ = 0;
|
||||
signal_strength_dbm_ = 0;
|
||||
signal_strength_ = 0;
|
||||
frequency_ = 0;
|
||||
}
|
||||
|
||||
void waybar::modules::Network::checkNewInterface(struct ifinfomsg *rtif) {
|
||||
auto new_iface = getPreferredIface(rtif->ifi_index);
|
||||
if (new_iface != -1) {
|
||||
ifid_ = new_iface;
|
||||
char ifname[IF_NAMESIZE];
|
||||
if_indextoname(new_iface, ifname);
|
||||
ifname_ = ifname;
|
||||
getInterfaceAddress();
|
||||
thread_timer_.wake_up();
|
||||
} else {
|
||||
ifid_ = -1;
|
||||
dp.emit();
|
||||
}
|
||||
}
|
||||
|
||||
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);
|
||||
auto ifi = static_cast<struct ifinfomsg *>(NLMSG_DATA(nh));
|
||||
if (nh->nlmsg_type == RTM_DELADDR) {
|
||||
// Check for valid interface
|
||||
if (ifi->ifi_index == net->ifid_) {
|
||||
net->ipaddr_.clear();
|
||||
net->netmask_.clear();
|
||||
net->cidr_ = 0;
|
||||
if (!(ifi->ifi_flags & IFF_RUNNING)) {
|
||||
net->clearIface();
|
||||
// Check for a new interface and get info
|
||||
net->checkNewInterface(ifi);
|
||||
} else {
|
||||
net->dp.emit();
|
||||
}
|
||||
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;
|
||||
bool carrier = false;
|
||||
|
||||
if (net->ifid_ != -1 && ifi->ifi_index != net->ifid_) {
|
||||
return NL_OK;
|
||||
}
|
||||
} else if (nh->nlmsg_type == RTM_NEWLINK || nh->nlmsg_type == RTM_DELLINK) {
|
||||
char ifname[IF_NAMESIZE];
|
||||
if_indextoname(ifi->ifi_index, ifname);
|
||||
// Check for valid interface
|
||||
if (ifi->ifi_index != net->ifid_ && net->checkInterface(ifi, ifname)) {
|
||||
net->ifname_ = ifname;
|
||||
net->ifid_ = ifi->ifi_index;
|
||||
// Get Iface and WIFI info
|
||||
net->getInterfaceAddress();
|
||||
net->thread_timer_.wake_up();
|
||||
return NL_OK;
|
||||
} else if (ifi->ifi_index == net->ifid_ &&
|
||||
(!(ifi->ifi_flags & IFF_RUNNING) || !(ifi->ifi_flags & IFF_UP) ||
|
||||
!net->checkInterface(ifi, ifname))) {
|
||||
|
||||
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()) {
|
||||
std::string new_ifname (ifname, ifname_len);
|
||||
net->ifname_ = new_ifname;
|
||||
}
|
||||
net->carrier_ = carrier;
|
||||
} 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;
|
||||
net->carrier_ = carrier;
|
||||
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();
|
||||
// Check for a new interface and get info
|
||||
net->checkNewInterface(ifi);
|
||||
return NL_OK;
|
||||
}
|
||||
} else {
|
||||
char ifname[IF_NAMESIZE];
|
||||
if_indextoname(ifi->ifi_index, ifname);
|
||||
// Auto detected network can also be assigned here
|
||||
if (ifi->ifi_index != net->ifid_ && net->checkInterface(ifi, ifname)) {
|
||||
// If iface is different, clear data
|
||||
if (ifi->ifi_index != net->ifid_) {
|
||||
net->clearIface();
|
||||
}
|
||||
net->ifname_ = ifname;
|
||||
net->ifid_ = ifi->ifi_index;
|
||||
}
|
||||
// Check for valid interface
|
||||
if (ifi->ifi_index == net->ifid_) {
|
||||
// Get Iface and WIFI info
|
||||
net->getInterfaceAddress();
|
||||
net->thread_timer_.wake_up();
|
||||
return NL_OK;
|
||||
net->dp.emit();
|
||||
}
|
||||
break;
|
||||
}
|
||||
return NL_SKIP;
|
||||
|
||||
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;
|
||||
|
||||
/* If we found the correct answer, skip parsing the attributes. */
|
||||
if (!is_del_event && net->ifid_ != -1) {
|
||||
return NL_OK;
|
||||
}
|
||||
|
||||
/* 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;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
/* If this is the default route, and we know the interface index,
|
||||
* we can stop parsing this message.
|
||||
*/
|
||||
if (has_gateway && !has_destination && temp_idx != -1) {
|
||||
if (!is_del_event) {
|
||||
net->ifid_ = temp_idx;
|
||||
|
||||
spdlog::debug("network: new default route via if{}", temp_idx);
|
||||
|
||||
/* 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_) {
|
||||
spdlog::debug("network: default route deleted {}/if{}",
|
||||
net->ifname_, temp_idx);
|
||||
|
||||
net->ifname_.clear();
|
||||
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) {
|
||||
|
|
|
|||
Loading…
Reference in New Issue