1 files changed, 136 insertions, 0 deletions
diff --git a/mullvad-cli/src/cmds/dns.rs b/mullvad-cli/src/cmds/dns.rs
new file mode 100644
index 0000000000..9ffa0ec09c
--- /dev/null
+++ b/mullvad-cli/src/cmds/dns.rs
@@ -0,0 +1,136 @@
+use crate::{new_rpc_client, Command, Result};
+use mullvad_management_interface::types;
+use mullvad_types::settings::{DnsOptions, DnsState};
+use std::convert::TryInto;
+
+pub struct Dns;
+
+#[mullvad_management_interface::async_trait]
+impl Command for Dns {
+    fn name(&self) -> &'static str {
+        "dns"
+    }
+
+    fn clap_subcommand(&self) -> clap::App<'static, 'static> {
+        clap::SubCommand::with_name(self.name())
+            .about("Configure DNS servers to use when connected")
+            .setting(clap::AppSettings::SubcommandRequiredElseHelp)
+            .subcommand(
+                clap::SubCommand::with_name("get").about("Display the current DNS settings"),
+            )
+            .subcommand(
+                clap::SubCommand::with_name("set")
+                    .about("Set DNS servers to use")
+                    .setting(clap::AppSettings::SubcommandRequiredElseHelp)
+                    .subcommand(
+                        clap::SubCommand::with_name("default")
+                            .about("Use default DNS servers")
+                            .arg(
+                                clap::Arg::with_name("block ads")
+                                    .long("block-ads")
+                                    .takes_value(false)
+                                    .help("Block domain names used for ads"),
+                            )
+                            .arg(
+                                clap::Arg::with_name("block trackers")
+                                    .long("block-trackers")
+                                    .takes_value(false)
+                                    .help("Block domain names used for tracking"),
+                            ),
+                    )
+                    .subcommand(
+                        clap::SubCommand::with_name("custom")
+                            .about("Set a list of custom DNS servers")
+                            .arg(
+                                clap::Arg::with_name("servers")
+                                    .multiple(true)
+                                    .help("One or more IP addresses pointing to DNS resolvers.")
+                                    .required(true),
+                            ),
+                    ),
+            )
+    }
+
+    async fn run(&self, matches: &clap::ArgMatches<'_>) -> Result<()> {
+        match matches.subcommand() {
+            ("set", Some(matches)) => match matches.subcommand() {
+                ("default", Some(matches)) => {
+                    self.set_default(
+                        matches.is_present("block ads"),
+                        matches.is_present("block trackers"),
+                    )
+                    .await
+                }
+                ("custom", Some(matches)) => {
+                    self.set_custom(matches.values_of_lossy("servers")).await
+                }
+                _ => unreachable!("No custom-dns server command given"),
+            },
+            ("get", _) => self.get().await,
+            _ => unreachable!("No custom-dns command given"),
+        }
+    }
+}
+
+impl Dns {
+    async fn set_default(&self, block_ads: bool, block_trackers: bool) -> Result<()> {
+        let mut rpc = new_rpc_client().await?;
+        let settings = rpc.get_settings(()).await?.into_inner();
+        rpc.set_dns_options(types::DnsOptions {
+            state: types::dns_options::DnsState::Default as i32,
+            default_options: Some(types::DefaultDnsOptions {
+                block_ads,
+                block_trackers,
+            }),
+            ..settings.tunnel_options.unwrap().dns_options.unwrap()
+        })
+        .await?;
+        println!("Updated DNS settings");
+        Ok(())
+    }
+
+    async fn set_custom(&self, servers: Option<Vec<String>>) -> Result<()> {
+        let mut rpc = new_rpc_client().await?;
+        let settings = rpc.get_settings(()).await?.into_inner();
+        rpc.set_dns_options(types::DnsOptions {
+            state: types::dns_options::DnsState::Custom as i32,
+            custom_options: Some(types::CustomDnsOptions {
+                addresses: servers.unwrap_or_default(),
+            }),
+            ..settings.tunnel_options.unwrap().dns_options.unwrap()
+        })
+        .await?;
+        println!("Updated DNS settings");
+        Ok(())
+    }
+
+    async fn get(&self) -> Result<()> {
+        let mut rpc = new_rpc_client().await?;
+        let options: DnsOptions = rpc
+            .get_settings(())
+            .await?
+            .into_inner()
+            .tunnel_options
+            .unwrap()
+            .dns_options
+            .unwrap()
+            .try_into()
+            .unwrap();
+
+        match options.state {
+            DnsState::Default => {
+                println!("Custom DNS: no");
+                println!("Block ads: {}", options.default_options.block_ads);
+                println!("Block trackers: {}", options.default_options.block_trackers);
+            }
+            DnsState::Custom => {
+                println!("Custom DNS: yes\nServers:");
+                for server in &options.custom_options.addresses {
+                    println!("{}", server);
+                }
+            }
+        }
+
+        Ok(())
+    }
+}