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refactor(network): fix skipped messages

This commit is contained in:
Alex 2019-03-18 11:07:36 +01:00
parent 3257968a28
commit 1ccf372f8e
2 changed files with 76 additions and 67 deletions
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5
include/modules/network.hpp
View File

@ -21,8 +21,8 @@ class Network : public ALabel {
auto update() -> void; auto update() -> void;
private: private:
static const uint8_t MAX_RETRY = 5; static const uint8_t MAX_RETRY = 5;
static const uint8_t EPOLL_MAX = 255;
static int handleEvents(struct nl_msg*, void*);
static int handleScan(struct nl_msg*, void*); static int handleScan(struct nl_msg*, void*);
void worker(); void worker();
@ -31,6 +31,7 @@ class Network : public ALabel {
void createEventSocket(); void createEventSocket();
int getExternalInterface(); int getExternalInterface();
void getInterfaceAddress(); void getInterfaceAddress();
void handleEvents();
int netlinkRequest(void*, uint32_t, uint32_t groups = 0); int netlinkRequest(void*, uint32_t, uint32_t groups = 0);
int netlinkResponse(void*, uint32_t, uint32_t groups = 0); int netlinkResponse(void*, uint32_t, uint32_t groups = 0);
void parseEssid(struct nlattr**); void parseEssid(struct nlattr**);
@ -44,7 +45,7 @@ class Network : public ALabel {
sa_family_t family_; sa_family_t family_;
struct sockaddr_nl nladdr_ = {0}; struct sockaddr_nl nladdr_ = {0};
struct nl_sock* sk_ = nullptr; struct nl_sock* sk_ = nullptr;
struct nl_sock* info_sock_ = nullptr; int info_sock_;
int efd_; int efd_;
int ev_fd_; int ev_fd_;
int nl80211_id_; int nl80211_id_;

100
src/modules/network.cpp
View File

@ -1,9 +1,10 @@
#include <sys/eventfd.h> #include <sys/eventfd.h>
#include <iostream>
#include "modules/network.hpp" #include "modules/network.hpp"
waybar::modules::Network::Network(const std::string& id, const Json::Value& config) waybar::modules::Network::Network(const std::string& id, const Json::Value& config)
: ALabel(config, "{ifname}", 60), family_(AF_INET), efd_(-1), ev_fd_(-1), : ALabel(config, "{ifname}", 60), family_(AF_INET), info_sock_(-1), efd_(-1),
cidr_(-1), signal_strength_dbm_(0), signal_strength_(0) ev_fd_(-1), cidr_(-1), signal_strength_dbm_(0), signal_strength_(0)
{ {
label_.set_name("network"); label_.set_name("network");
if (!id.empty()) { if (!id.empty()) {
@ -39,11 +40,8 @@ waybar::modules::Network::~Network()
if (efd_ > -1) { if (efd_ > -1) {
close(efd_); close(efd_);
} }
if (info_sock_ != nullptr) { if (info_sock_ != -1) {
nl_socket_drop_membership(info_sock_, RTMGRP_LINK); close(info_sock_);
nl_socket_drop_membership(info_sock_, RTMGRP_IPV4_IFADDR);
nl_close(info_sock_);
nl_socket_free(info_sock_);
} }
if (sk_ != nullptr) { if (sk_ != nullptr) {
nl_close(sk_); nl_close(sk_);
@ -53,19 +51,18 @@ waybar::modules::Network::~Network()
void waybar::modules::Network::createInfoSocket() void waybar::modules::Network::createInfoSocket()
{ {
info_sock_ = nl_socket_alloc(); struct sockaddr_nl sa;
if (nl_connect(info_sock_, NETLINK_ROUTE) != 0) { info_sock_ = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (info_sock_ < 0) {
throw std::runtime_error("Can't connect network socket"); throw std::runtime_error("Can't connect network socket");
} }
if (nl_socket_add_membership(info_sock_, RTMGRP_LINK) != 0) { sa.nl_family = AF_NETLINK;
sa.nl_groups = RTMGRP_LINK | RTMGRP_IPV4_IFADDR | RTMGRP_IPV4_ROUTE
| RTMGRP_IPV6_IFADDR | RTMGRP_IPV6_ROUTE;
auto ret = bind(info_sock_, (struct sockaddr *)&sa, sizeof(sa));
if (ret < 0) {
throw std::runtime_error("Can't add membership"); throw std::runtime_error("Can't add membership");
} }
if (nl_socket_add_membership(info_sock_, RTMGRP_IPV4_IFADDR) != 0) {
throw std::runtime_error("Can't add membership");
}
nl_socket_disable_seq_check(info_sock_);
nl_socket_set_nonblocking(info_sock_);
nl_socket_modify_cb(info_sock_, NL_CB_VALID, NL_CB_CUSTOM, handleEvents, this);
efd_ = epoll_create1(0); efd_ = epoll_create1(0);
if (efd_ < 0) { if (efd_ < 0) {
throw std::runtime_error("Can't create epoll"); throw std::runtime_error("Can't create epoll");
@ -80,11 +77,10 @@ void waybar::modules::Network::createInfoSocket()
} }
} }
{ {
auto fd = nl_socket_get_fd(info_sock_);
struct epoll_event event; struct epoll_event event;
event.events = EPOLLIN | EPOLLET | EPOLLRDHUP; event.events = EPOLLIN | EPOLLET;
event.data.fd = fd; event.data.fd = info_sock_;
if (epoll_ctl(efd_, EPOLL_CTL_ADD, fd, &event) == -1) { if (epoll_ctl(efd_, EPOLL_CTL_ADD, info_sock_, &event) == -1) {
throw std::runtime_error("Can't add epoll event"); throw std::runtime_error("Can't add epoll event");
} }
} }
@ -114,16 +110,17 @@ void waybar::modules::Network::worker()
} }
thread_timer_.sleep_for(interval_); thread_timer_.sleep_for(interval_);
}; };
thread_ = [this] { struct epoll_event events[EPOLL_MAX] = {0};
struct epoll_event events[16]; thread_ = [this, &events] {
int ec = epoll_wait(efd_, events, 16, -1); int ec = epoll_wait(efd_, events, EPOLL_MAX, -1);
if (ec > 0) { if (ec > 0) {
for (auto i = 0; i < ec; i++) { for (auto i = 0; i < ec; i++) {
if (events[i].data.fd == nl_socket_get_fd(info_sock_)) { if (events[i].data.fd == ev_fd_) {
nl_recvmsgs_default(info_sock_);
} else {
thread_.stop(); thread_.stop();
break; return;
}
if (events[i].events & EPOLLIN) {
handleEvents();
} }
} }
} else if (ec == -1) { } else if (ec == -1) {
@ -377,7 +374,7 @@ int waybar::modules::Network::netlinkRequest(void *req,
sa.nl_groups = groups; sa.nl_groups = groups;
struct iovec iov = { req, reqlen }; struct iovec iov = { req, reqlen };
struct msghdr msg = { &sa, sizeof(sa), &iov, 1, nullptr, 0, 0 }; struct msghdr msg = { &sa, sizeof(sa), &iov, 1, nullptr, 0, 0 };
return sendmsg(nl_socket_get_fd(info_sock_), &msg, 0); return sendmsg(info_sock_, &msg, 0);
} }
int waybar::modules::Network::netlinkResponse(void *resp, int waybar::modules::Network::netlinkResponse(void *resp,
@ -388,53 +385,64 @@ int waybar::modules::Network::netlinkResponse(void *resp,
sa.nl_groups = groups; sa.nl_groups = groups;
struct iovec iov = { resp, resplen }; struct iovec iov = { resp, resplen };
struct msghdr msg = { &sa, sizeof(sa), &iov, 1, nullptr, 0, 0 }; struct msghdr msg = { &sa, sizeof(sa), &iov, 1, nullptr, 0, 0 };
auto ret = recvmsg(nl_socket_get_fd(info_sock_), &msg, 0); auto ret = recvmsg(info_sock_, &msg, 0);
if (msg.msg_flags & MSG_TRUNC) { if (msg.msg_flags & MSG_TRUNC) {
return -1; return -1;
} }
return ret; return ret;
} }
int waybar::modules::Network::handleEvents(struct nl_msg *msg, void *data) { void waybar::modules::Network::handleEvents() {
auto net = static_cast<waybar::modules::Network *>(data); struct sockaddr_nl addr;
char buff[2048] = {0};
socklen_t len = 0;
while (true) {
len = sizeof(addr);
auto ret = recvfrom(info_sock_, (void *)buff, sizeof(buff), 0,
(struct sockaddr *)&addr, &len);
auto nh = (struct nlmsghdr *)buff;
for(; NLMSG_OK(nh, ret); nh = NLMSG_NEXT(nh, ret)) {
bool need_update = false; bool need_update = false;
nlmsghdr *nh = nlmsg_hdr(msg);
if (nh->nlmsg_type == RTM_NEWADDR) { if (nh->nlmsg_type == RTM_NEWADDR) {
need_update = true; need_update = true;
} }
if (nh->nlmsg_type < RTM_NEWADDR) { if (nh->nlmsg_type < RTM_NEWADDR) {
auto rtif = static_cast<struct ifinfomsg *>(NLMSG_DATA(nh)); auto rtif = static_cast<struct ifinfomsg *>(NLMSG_DATA(nh));
if (rtif->ifi_index == static_cast<int>(net->ifid_)) { if (rtif->ifi_index == static_cast<int>(ifid_)) {
need_update = true; need_update = true;
if (!(rtif->ifi_flags & IFF_RUNNING)) { if (!(rtif->ifi_flags & IFF_RUNNING)) {
net->disconnected(); disconnected();
net->dp.emit(); dp.emit();
return;
} }
} }
} }
if (net->ifid_ <= 0 && !net->config_["interface"].isString()) { if (ifid_ <= 0 && !config_["interface"].isString()) {
for (uint8_t i = 0; i < MAX_RETRY; i += 1) { for (uint8_t i = 0; i < MAX_RETRY; i += 1) {
net->ifid_ = net->getExternalInterface(); ifid_ = getExternalInterface();
if (net->ifid_ > 0) { if (ifid_ > 0) {
break; break;
} }
// Need to wait before get external interface // Need to wait before get external interface
net->thread_.sleep_for(std::chrono::seconds(1)); thread_.sleep_for(std::chrono::seconds(1));
} }
if (net->ifid_ > 0) { if (ifid_ > 0) {
char ifname[IF_NAMESIZE]; char ifname[IF_NAMESIZE];
if_indextoname(net->ifid_, ifname); if_indextoname(ifid_, ifname);
net->ifname_ = ifname; ifname_ = ifname;
need_update = true; need_update = true;
} }
} }
if (need_update) { if (need_update) {
if (net->ifid_ > 0) { if (ifid_ > 0) {
net->getInfo(); getInfo();
}
dp.emit();
}
break;
} }
net->dp.emit();
} }
return NL_SKIP;
} }
int waybar::modules::Network::handleScan(struct nl_msg *msg, void *data) { int waybar::modules::Network::handleScan(struct nl_msg *msg, void *data) {