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Merged
merged 3 commits into from
Apr 5, 2020
Merged

Feature, hide dns queries by default #161

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4d826e7
add filter by dns queries
olehs0 Apr 2, 2020
f1fdb56
update snapshots with cargo fmt
olehs0 Apr 2, 2020
229f66e
add tests with filtering improvement
olehs0 Apr 5, 2020
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17 changes: 13 additions & 4 deletions src/display/components/help_text.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -6,22 +6,31 @@ use ::tui::widgets::{Paragraph, Text, Widget};

pub struct HelpText {
pub paused: bool,
pub show_dns: bool,
}

const TEXT_WHEN_PAUSED: &str = " Press <SPACE> to resume.";
const TEXT_WHEN_NOT_PAUSED: &str = " Press <SPACE> to pause.";
const TEXT_WHEN_PAUSED: &str = " Press <SPACE> to resume";
const TEXT_WHEN_NOT_PAUSED: &str = " Press <SPACE> to pause";
const TEXT_WHEN_DNS_NOT_SHOWN: &str = " (DNS queries hidden).";
const TEXT_WHEN_DNS_SHOWN: &str = " (DNS queries shown).";

impl HelpText {
pub fn render(&self, frame: &mut Frame<impl Backend>, rect: Rect) {
let text = {
let content = if self.paused {
let pause_content = if self.paused {
TEXT_WHEN_PAUSED
} else {
TEXT_WHEN_NOT_PAUSED
};

let dns_content = if self.show_dns {
TEXT_WHEN_DNS_SHOWN
} else {
TEXT_WHEN_DNS_NOT_SHOWN
};

[Text::styled(
content,
format!("{}{}", pause_content, dns_content),
Style::default().modifier(Modifier::BOLD),
)]
};
Expand Down
4 changes: 2 additions & 2 deletions src/display/ui.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -77,7 +77,7 @@ where
));
}
}
pub fn draw(&mut self, paused: bool) {
pub fn draw(&mut self, paused: bool, show_dns: bool) {
let state = &self.state;
let children = self.get_tables_to_display();
self.terminal
Expand All @@ -87,7 +87,7 @@ where
state: &state,
paused,
};
let help_text = HelpText { paused };
let help_text = HelpText { paused, show_dns };
let layout = Layout {
header: total_bandwidth,
children,
Expand Down
13 changes: 9 additions & 4 deletions src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -46,9 +46,12 @@ pub struct Opt {
no_resolve: bool,
#[structopt(flatten)]
render_opts: RenderOpts,
#[structopt(short, long)]
/// Show DNS queries
show_dns: bool,
}

#[derive(StructOpt, Debug)]
#[derive(StructOpt, Debug, Copy, Clone)]
pub struct RenderOpts {
#[structopt(short, long)]
/// Show processes table only
Expand Down Expand Up @@ -115,6 +118,7 @@ where
{
let running = Arc::new(AtomicBool::new(true));
let paused = Arc::new(AtomicBool::new(false));
let dns_shown = opts.show_dns;

let mut active_threads = vec![];

Expand All @@ -141,7 +145,7 @@ where
on_winch({
Box::new(move || {
let mut ui = ui.lock().unwrap();
ui.draw(paused.load(Ordering::SeqCst));
ui.draw(paused.load(Ordering::SeqCst), dns_shown);
})
});
}
Expand Down Expand Up @@ -184,7 +188,7 @@ where
if raw_mode {
ui.output_text(&mut write_to_stdout);
} else {
ui.draw(paused);
ui.draw(paused, dns_shown);
}
}
let render_duration = render_start_time.elapsed();
Expand Down Expand Up @@ -235,12 +239,13 @@ where
.map(|(iface, frames)| {
let name = format!("sniffing_handler_{}", iface.name);
let running = running.clone();
let show_dns = opts.show_dns;
let network_utilization = network_utilization.clone();

thread::Builder::new()
.name(name)
.spawn(move || {
let mut sniffer = Sniffer::new(iface, frames);
let mut sniffer = Sniffer::new(iface, frames, show_dns);

while running.load(Ordering::Acquire) {
if let Some(segment) = sniffer.next() {
Expand Down
23 changes: 18 additions & 5 deletions src/network/sniffer.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -80,16 +80,19 @@ macro_rules! extract_transport_protocol {
pub struct Sniffer {
network_interface: NetworkInterface,
network_frames: Box<dyn DataLinkReceiver>,
dns_shown: bool,
}

impl Sniffer {
pub fn new(
network_interface: NetworkInterface,
network_frames: Box<dyn DataLinkReceiver>,
dns_shown: bool,
) -> Self {
Sniffer {
network_interface,
network_frames,
dns_shown,
}
}
pub fn next(&mut self) -> Option<Segment> {
Expand All @@ -109,17 +112,19 @@ impl Sniffer {
let version = ip_packet.get_version();

match version {
4 => Self::handle_v4(ip_packet, &self.network_interface),
4 => Self::handle_v4(ip_packet, &self.network_interface, self.dns_shown),
6 => Self::handle_v6(
Ipv6Packet::new(&bytes[payload_offset..])?,
&self.network_interface,
),
_ => {
let pkg = EthernetPacket::new(bytes)?;
match pkg.get_ethertype() {
EtherTypes::Ipv4 => {
Self::handle_v4(Ipv4Packet::new(pkg.payload())?, &self.network_interface)
}
EtherTypes::Ipv4 => Self::handle_v4(
Ipv4Packet::new(pkg.payload())?,
&self.network_interface,
self.dns_shown,
),
EtherTypes::Ipv6 => {
Self::handle_v6(Ipv6Packet::new(pkg.payload())?, &self.network_interface)
}
Expand Down Expand Up @@ -148,7 +153,11 @@ impl Sniffer {
direction,
})
}
fn handle_v4(ip_packet: Ipv4Packet, network_interface: &NetworkInterface) -> Option<Segment> {
fn handle_v4(
ip_packet: Ipv4Packet,
network_interface: &NetworkInterface,
show_dns: bool,
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Hmm... can't we use self.dns_shown inside this function instead of passing show_dns to it?

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You're right. I'm not sure why we implemented it like that shrugs nevermind. :)

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@imsnif ok, so, we keep at as it is, or should i try to modify it and passing self parameter ?

) -> Option<Segment> {
let (protocol, source_port, destination_port, data_length) =
extract_transport_protocol!(ip_packet);

Expand All @@ -161,6 +170,10 @@ impl Sniffer {
Direction::Download => Connection::new(from, to.ip(), destination_port, protocol),
Direction::Upload => Connection::new(to, from.ip(), source_port, protocol),
};

if !show_dns && connection.remote_socket.port == 53 {
return None;
}
Some(Segment {
interface_name,
connection,
Expand Down
1 change: 1 addition & 0 deletions src/tests/cases/raw_mode.rs
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Expand Up @@ -576,6 +576,7 @@ fn no_resolve_mode() {
interface: Some(String::from("interface_name")),
raw: true,
no_resolve: true,
show_dns: false,
render_opts: RenderOpts {
addresses: false,
connections: false,
Expand Down
2 changes: 1 addition & 1 deletion src/tests/cases/snapshots/ui__basic_only_addresses.snap
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Expand Up @@ -51,5 +51,5 @@ expression: "&terminal_draw_events_mirror[0]"
│ │
│ │
└────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
Press <SPACE> to pause.
Press <SPACE> to pause (DNS queries hidden).

2 changes: 1 addition & 1 deletion src/tests/cases/snapshots/ui__basic_only_connections.snap
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Original file line number Diff line number Diff line change
Expand Up @@ -51,5 +51,5 @@ expression: "&terminal_draw_events_mirror[0]"
│ │
│ │
└────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
Press <SPACE> to pause.
Press <SPACE> to pause (DNS queries hidden).

2 changes: 1 addition & 1 deletion src/tests/cases/snapshots/ui__basic_only_processes.snap
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Original file line number Diff line number Diff line change
Expand Up @@ -51,5 +51,5 @@ expression: "&terminal_draw_events_mirror[0]"
│ │
│ │
└────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
Press <SPACE> to pause.
Press <SPACE> to pause (DNS queries hidden).

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