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public IP address autodiscovery #20

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lx merged 10 commits from stun into main 2023-04-21 09:56:22 +00:00
Conversation 0 Commits 10 Files changed 17 +2733 -1039
17 changed files with 2733 additions and 1039 deletions
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75
.rustfmt.toml
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@ -1,75 +0,0 @@
unstable_features = true
array_width = 60
attr_fn_like_width = 70
binop_separator = "Front"
blank_lines_lower_bound = 0
blank_lines_upper_bound = 1
brace_style = "SameLineWhere"
chain_width = 60
color = "Auto"
combine_control_expr = true
comment_width = 80
condense_wildcard_suffixes = true
control_brace_style = "AlwaysSameLine"
disable_all_formatting = false
empty_item_single_line = true
enum_discrim_align_threshold = 0
error_on_line_overflow = true
error_on_unformatted = true
fn_args_layout = "Tall"
fn_call_width = 60
fn_single_line = true
force_explicit_abi = true
force_multiline_blocks = false
format_code_in_doc_comments = true
# format_generated_files = true
format_macro_matchers = true
format_macro_bodies = true
format_strings = true
hard_tabs = false
#hex_literal_case = "Lower"
hide_parse_errors = false
ignore = []
imports_indent = "Block"
imports_layout = "Mixed"
indent_style = "Block"
inline_attribute_width = 0
license_template_path = ""
match_arm_blocks = true
match_arm_leading_pipes = "Never"
match_block_trailing_comma = false
max_width = 100
merge_derives = true
imports_granularity = "Crate"
newline_style = "Unix"
normalize_comments = true
normalize_doc_attributes = true
overflow_delimited_expr = false
remove_nested_parens = true
reorder_impl_items = true
reorder_imports = true
group_imports = "StdExternalCrate"
reorder_modules = true
report_fixme = "Unnumbered"
report_todo = "Unnumbered"
required_version = "1.4.37"
skip_children = false
single_line_if_else_max_width = 50
space_after_colon = true
space_before_colon = false
#space_around_ranges = false
struct_field_align_threshold = 0
struct_lit_single_line = true
struct_lit_width = 18
struct_variant_width = 35
tab_spaces = 2
trailing_comma = "Vertical"
trailing_semicolon = false
type_punctuation_density = "Wide"
use_field_init_shorthand = false
use_small_heuristics = "Off"
use_try_shorthand = true
version = "Two"
where_single_line = true
wrap_comments = true

866
Cargo.lock generated
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1265
Cargo.nix
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1
Cargo.toml
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@ -21,3 +21,4 @@ serde = { version = "1.0.107", features = ["derive"] }
serde-lexpr = "0.1.1" serde-lexpr = "0.1.1"
serde_json = "1.0.53" serde_json = "1.0.53"
tokio = { version = "1", features = ["sync", "rt-multi-thread", "net", "macros"] } tokio = { version = "1", features = ["sync", "rt-multi-thread", "net", "macros"] }
stun-client = "0.1.2"

5
src/config/mod.rs
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@ -3,11 +3,12 @@ mod options;
mod options_test; mod options_test;
mod runtime; mod runtime;
pub use options::{ConfigOpts, ConfigOptsAcme, ConfigOptsBase, ConfigOptsConsul}; pub use options::{ConfigOpts, ConfigOptsBase, ConfigOptsConsul};
pub use runtime::{ pub use runtime::{
RuntimeConfig, RuntimeConfigAcme, RuntimeConfigConsul, RuntimeConfigFirewall, RuntimeConfigIgd, RuntimeConfig, RuntimeConfigConsul, RuntimeConfigFirewall, RuntimeConfigIgd, RuntimeConfigStun,
}; };
pub const EXPIRATION_TIME: u16 = 300; pub const EXPIRATION_TIME: u16 = 300;
pub const REFRESH_TIME: u16 = 60; pub const REFRESH_TIME: u16 = 60;
pub const CONSUL_URL: &str = "http://127.0.0.1:8500"; pub const CONSUL_URL: &str = "http://127.0.0.1:8500";
pub const STUN_SERVER: &str = "stun.nextcloud.com:443";

106
src/config/options.rs
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@ -11,77 +11,67 @@ use crate::config::RuntimeConfig;
/// Base configuration options /// Base configuration options
#[derive(Clone, Default, Deserialize)] #[derive(Clone, Default, Deserialize)]
pub struct ConfigOptsBase { pub struct ConfigOptsBase {
/// This node's private IP address [default: None] /// This node's private IP address [default: None]
pub private_ip: Option<String>, pub private_ip: Option<String>,
/// Expiration time for IGD rules [default: 60] /// Expiration time for IGD rules [default: 60]
pub expiration_time: Option<u16>, pub expiration_time: Option<u16>,
/// Refresh time for IGD and Firewall rules [default: 300] /// Refresh time for IGD and Firewall rules [default: 300]
pub refresh_time: Option<u16>, pub refresh_time: Option<u16>,
} /// STUN server [default: stun.nextcloud.com:443]
pub stun_server: Option<String>,
/// ACME configuration options /// IPv6-only mode (disables IGD, IPv4 firewall and IPv4 address autodiscovery) [default: false]
#[derive(Clone, Default, Deserialize)] #[serde(default)]
pub struct ConfigOptsAcme { pub ipv6_only: bool,
/// Whether ACME is enabled [default: false]
#[serde(default)]
pub enable: bool,
/// The default domain holder's e-mail [default: None]
pub email: Option<String>,
} }
/// Consul configuration options /// Consul configuration options
#[derive(Clone, Default, Deserialize)] #[derive(Clone, Default, Deserialize)]
pub struct ConfigOptsConsul { pub struct ConfigOptsConsul {
/// Consul's node name [default: None] /// Consul's node name [default: None]
pub node_name: Option<String>, pub node_name: Option<String>,
/// Consul's REST URL [default: "http://127.0.0.1:8500"] /// Consul's REST URL [default: "http://127.0.0.1:8500"]
pub url: Option<String>, pub url: Option<String>,
/// Consul's CA certificate [default: None] /// Consul's CA certificate [default: None]
pub ca_cert: Option<String>, pub ca_cert: Option<String>,
/// Skip TLS verification for Consul server [default: false] /// Skip TLS verification for Consul server [default: false]
#[serde(default)] #[serde(default)]
pub tls_skip_verify: bool, pub tls_skip_verify: bool,
/// Consul's client certificate [default: None] /// Consul's client certificate [default: None]
pub client_cert: Option<String>, pub client_cert: Option<String>,
/// Consul's client key [default: None] /// Consul's client key [default: None]
pub client_key: Option<String>, pub client_key: Option<String>,
} }
/// Model of all potential configuration options /// Model of all potential configuration options
pub struct ConfigOpts { pub struct ConfigOpts {
pub base: ConfigOptsBase, pub base: ConfigOptsBase,
pub acme: ConfigOptsAcme, pub consul: ConfigOptsConsul,
pub consul: ConfigOptsConsul,
} }
impl ConfigOpts { impl ConfigOpts {
pub fn from_env() -> Result<RuntimeConfig> { pub fn from_env() -> Result<RuntimeConfig> {
let base: ConfigOptsBase = envy::prefixed("DIPLONAT_").from_env()?; let base: ConfigOptsBase = envy::prefixed("DIPLONAT_").from_env()?;
let consul: ConfigOptsConsul = envy::prefixed("DIPLONAT_CONSUL_").from_env()?; let consul: ConfigOptsConsul = envy::prefixed("DIPLONAT_CONSUL_").from_env()?;
let acme: ConfigOptsAcme = envy::prefixed("DIPLONAT_ACME_").from_env()?;
RuntimeConfig::new(Self { RuntimeConfig::new(Self {
base: base, base: base,
consul: consul, consul: consul,
acme: acme, })
}) }
}
// Currently only used in tests // Currently only used in tests
#[allow(dead_code)] #[cfg(test)]
pub fn from_iter<Iter: Clone>(iter: Iter) -> Result<RuntimeConfig> pub fn from_iter<Iter: Clone>(iter: Iter) -> Result<RuntimeConfig>
where where
Iter: IntoIterator<Item = (String, String)>, Iter: IntoIterator<Item = (String, String)>,
{ {
let base: ConfigOptsBase = envy::prefixed("DIPLONAT_").from_iter(iter.clone())?; let base: ConfigOptsBase = envy::prefixed("DIPLONAT_").from_iter(iter.clone())?;
let consul: ConfigOptsConsul = envy::prefixed("DIPLONAT_CONSUL_").from_iter(iter.clone())?; let consul: ConfigOptsConsul =
let acme: ConfigOptsAcme = envy::prefixed("DIPLONAT_ACME_").from_iter(iter.clone())?; envy::prefixed("DIPLONAT_CONSUL_").from_iter(iter.clone())?;
RuntimeConfig::new(Self { RuntimeConfig::new(Self {
base: base, base: base,
consul: consul, consul: consul,
acme: acme, })
}) }
}
} }

171
src/config/options_test.rs
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@ -9,116 +9,111 @@ use crate::config::*;
// This is why we only test ConfigOpts::from_iter(iter). // This is why we only test ConfigOpts::from_iter(iter).
fn minimal_valid_options() -> HashMap<String, String> { fn minimal_valid_options() -> HashMap<String, String> {
let mut opts = HashMap::new(); let mut opts = HashMap::new();
opts.insert( opts.insert(
"DIPLONAT_CONSUL_NODE_NAME".to_string(), "DIPLONAT_CONSUL_NODE_NAME".to_string(),
"consul_node".to_string(), "consul_node".to_string(),
); );
opts opts
} }
fn all_valid_options() -> HashMap<String, String> { fn all_valid_options() -> HashMap<String, String> {
let mut opts = minimal_valid_options(); let mut opts = minimal_valid_options();
opts.insert("DIPLONAT_EXPIRATION_TIME".to_string(), "30".to_string()); opts.insert("DIPLONAT_EXPIRATION_TIME".to_string(), "30".to_string());
opts.insert( opts.insert(
"DIPLONAT_PRIVATE_IP".to_string(), "DIPLONAT_STUN_SERVER".to_string(),
"172.123.43.555".to_string(), "stun.nextcloud.com:443".to_string(),
); );
opts.insert("DIPLONAT_REFRESH_TIME".to_string(), "10".to_string()); opts.insert(
opts.insert( "DIPLONAT_PRIVATE_IP".to_string(),
"DIPLONAT_CONSUL_URL".to_string(), "172.123.43.55".to_string(),
"http://127.0.0.1:9999".to_string(), );
); opts.insert("DIPLONAT_REFRESH_TIME".to_string(), "10".to_string());
opts.insert("DIPLONAT_ACME_ENABLE".to_string(), "true".to_string()); opts.insert(
opts.insert( "DIPLONAT_CONSUL_URL".to_string(),
"DIPLONAT_ACME_EMAIL".to_string(), "http://127.0.0.1:9999".to_string(),
"bozo@bozo.net".to_string(), );
); opts.insert("DIPLONAT_ACME_ENABLE".to_string(), "true".to_string());
opts opts.insert(
"DIPLONAT_ACME_EMAIL".to_string(),
"bozo@bozo.net".to_string(),
);
opts
} }
#[test] #[test]
#[should_panic] #[should_panic]
fn err_empty_env() { fn err_empty_env() {
std::env::remove_var("DIPLONAT_CONSUL_NODE_NAME"); std::env::remove_var("DIPLONAT_CONSUL_NODE_NAME");
ConfigOpts::from_env().unwrap(); ConfigOpts::from_env().unwrap();
} }
#[test] #[test]
fn ok_from_iter_minimal_valid_options() { fn ok_from_iter_minimal_valid_options() {
let opts = minimal_valid_options(); let opts = minimal_valid_options();
let rt_config = ConfigOpts::from_iter(opts.clone()).unwrap(); let rt_config = ConfigOpts::from_iter(opts.clone()).unwrap();
assert!(rt_config.acme.is_none()); assert_eq!(
assert_eq!( &rt_config.consul.node_name,
&rt_config.consul.node_name, opts.get(&"DIPLONAT_CONSUL_NODE_NAME".to_string()).unwrap()
opts.get(&"DIPLONAT_CONSUL_NODE_NAME".to_string()).unwrap() );
); assert_eq!(rt_config.consul.url, CONSUL_URL.to_string());
assert_eq!(rt_config.consul.url, CONSUL_URL.to_string()); assert_eq!(
assert_eq!( rt_config.firewall.refresh_time,
rt_config.firewall.refresh_time, Duration::from_secs(REFRESH_TIME.into())
Duration::from_secs(REFRESH_TIME.into()) );
); let igd = rt_config.igd.unwrap();
assert!(rt_config.igd.private_ip.is_none()); assert!(igd.private_ip.is_none());
assert_eq!( assert_eq!(
rt_config.igd.expiration_time, igd.expiration_time,
Duration::from_secs(EXPIRATION_TIME.into()) Duration::from_secs(EXPIRATION_TIME.into())
); );
assert_eq!( assert_eq!(igd.refresh_time, Duration::from_secs(REFRESH_TIME.into()));
rt_config.igd.refresh_time,
Duration::from_secs(REFRESH_TIME.into())
);
} }
#[test] #[test]
#[should_panic] #[should_panic]
fn err_from_iter_invalid_refresh_time() { fn err_from_iter_invalid_refresh_time() {
let mut opts = minimal_valid_options(); let mut opts = minimal_valid_options();
opts.insert("DIPLONAT_EXPIRATION_TIME".to_string(), "60".to_string()); opts.insert("DIPLONAT_EXPIRATION_TIME".to_string(), "60".to_string());
opts.insert("DIPLONAT_REFRESH_TIME".to_string(), "60".to_string()); opts.insert("DIPLONAT_REFRESH_TIME".to_string(), "60".to_string());
ConfigOpts::from_iter(opts).unwrap(); ConfigOpts::from_iter(opts).unwrap();
} }
#[test] #[test]
fn ok_from_iter_all_valid_options() { fn ok_from_iter_all_valid_options() {
let opts = all_valid_options(); let opts = all_valid_options();
let rt_config = ConfigOpts::from_iter(opts.clone()).unwrap(); let rt_config = ConfigOpts::from_iter(opts.clone()).unwrap();
let expiration_time = Duration::from_secs( let expiration_time = Duration::from_secs(
opts opts.get(&"DIPLONAT_EXPIRATION_TIME".to_string())
.get(&"DIPLONAT_EXPIRATION_TIME".to_string()) .unwrap()
.unwrap() .parse::<u64>()
.parse::<u64>() .unwrap()
.unwrap() .into(),
.into(), );
); let refresh_time = Duration::from_secs(
let refresh_time = Duration::from_secs( opts.get(&"DIPLONAT_REFRESH_TIME".to_string())
opts .unwrap()
.get(&"DIPLONAT_REFRESH_TIME".to_string()) .parse::<u64>()
.unwrap() .unwrap()
.parse::<u64>() .into(),
.unwrap() );
.into(),
);
assert!(rt_config.acme.is_some()); assert_eq!(
assert_eq!( &rt_config.consul.node_name,
&rt_config.acme.unwrap().email, opts.get(&"DIPLONAT_CONSUL_NODE_NAME".to_string()).unwrap()
opts.get(&"DIPLONAT_ACME_EMAIL".to_string()).unwrap() );
); assert_eq!(
assert_eq!( &rt_config.consul.url,
&rt_config.consul.node_name, opts.get(&"DIPLONAT_CONSUL_URL".to_string()).unwrap()
opts.get(&"DIPLONAT_CONSUL_NODE_NAME".to_string()).unwrap() );
); assert_eq!(rt_config.firewall.refresh_time, refresh_time);
assert_eq!( let igd = rt_config.igd.unwrap();
&rt_config.consul.url, assert_eq!(
opts.get(&"DIPLONAT_CONSUL_URL".to_string()).unwrap() &igd.private_ip.unwrap().to_string(),
); opts.get(&"DIPLONAT_PRIVATE_IP".to_string()).unwrap()
assert_eq!(rt_config.firewall.refresh_time, refresh_time); );
assert_eq!( assert_eq!(igd.expiration_time, expiration_time);
&rt_config.igd.private_ip.unwrap(), assert_eq!(igd.refresh_time, refresh_time);
opts.get(&"DIPLONAT_PRIVATE_IP".to_string()).unwrap()
);
assert_eq!(rt_config.igd.expiration_time, expiration_time);
assert_eq!(rt_config.igd.refresh_time, refresh_time);
} }

240
src/config/runtime.rs
View file

@ -1,151 +1,191 @@
use std::fs::File; use std::fs::File;
use std::io::Read; use std::io::Read;
use std::net::{Ipv4Addr, SocketAddr, ToSocketAddrs};
use std::time::Duration; use std::time::Duration;
use anyhow::{anyhow, bail, Result}; use anyhow::{anyhow, bail, Context, Result};
use crate::config::{ConfigOpts, ConfigOptsAcme, ConfigOptsBase, ConfigOptsConsul}; use crate::config::{ConfigOpts, ConfigOptsBase, ConfigOptsConsul};
// This code is inspired by the Trunk crate (https://github.com/thedodd/trunk) // This code is inspired by the Trunk crate (https://github.com/thedodd/trunk)
// In this file, we take ConfigOpts and transform them into ready-to-use // In this file, we take ConfigOpts and transform them into ready-to-use
// RuntimeConfig. We apply default values and business logic. // RuntimeConfig. We apply default values and business logic.
#[derive(Debug)]
pub struct RuntimeConfigAcme {
pub email: String,
}
#[derive(Debug)] #[derive(Debug)]
pub struct RuntimeConfigConsul { pub struct RuntimeConfigConsul {
pub node_name: String, pub node_name: String,
pub url: String, pub url: String,
pub tls: Option<(Option<reqwest::Certificate>, bool, reqwest::Identity)>, pub tls: Option<(Option<reqwest::Certificate>, bool, reqwest::Identity)>,
} }
#[derive(Debug)] #[derive(Debug)]
pub struct RuntimeConfigFirewall { pub struct RuntimeConfigFirewall {
pub refresh_time: Duration, pub ipv6_only: bool,
pub refresh_time: Duration,
} }
#[derive(Debug)] #[derive(Debug)]
pub struct RuntimeConfigIgd { pub struct RuntimeConfigIgd {
pub private_ip: Option<String>, pub private_ip: Option<Ipv4Addr>,
pub expiration_time: Duration, pub expiration_time: Duration,
pub refresh_time: Duration, pub refresh_time: Duration,
}
#[derive(Debug)]
pub struct RuntimeConfigStun {
pub stun_server_v4: Option<SocketAddr>,
pub stun_server_v6: SocketAddr,
pub refresh_time: Duration,
} }
#[derive(Debug)] #[derive(Debug)]
pub struct RuntimeConfig { pub struct RuntimeConfig {
pub acme: Option<RuntimeConfigAcme>, pub consul: RuntimeConfigConsul,
pub consul: RuntimeConfigConsul, pub firewall: RuntimeConfigFirewall,
pub firewall: RuntimeConfigFirewall, pub igd: Option<RuntimeConfigIgd>,
pub igd: RuntimeConfigIgd, pub stun: RuntimeConfigStun,
} }
impl RuntimeConfig { impl RuntimeConfig {
pub fn new(opts: ConfigOpts) -> Result<Self> { pub fn new(opts: ConfigOpts) -> Result<Self> {
let acme = RuntimeConfigAcme::new(opts.acme.clone())?; let consul = RuntimeConfigConsul::new(opts.consul)?;
let consul = RuntimeConfigConsul::new(opts.consul.clone())?; let firewall = RuntimeConfigFirewall::new(&opts.base)?;
let firewall = RuntimeConfigFirewall::new(opts.base.clone())?; let igd = match opts.base.ipv6_only {
let igd = RuntimeConfigIgd::new(opts.base.clone())?; false => Some(RuntimeConfigIgd::new(&opts.base)?),
true => None,
};
let stun = RuntimeConfigStun::new(&opts.base)?;
Ok(Self { Ok(Self {
acme, consul,
consul, firewall,
firewall, igd,
igd, stun,
}) })
}
}
impl RuntimeConfigAcme {
pub fn new(opts: ConfigOptsAcme) -> Result<Option<Self>> {
if !opts.enable {
return Ok(None);
} }
let email = opts.email.expect(
"'DIPLONAT_ACME_EMAIL' environment variable is required if 'DIPLONAT_ACME_ENABLE' == 'true'",
);
Ok(Some(Self { email }))
}
} }
impl RuntimeConfigConsul { impl RuntimeConfigConsul {
pub(super) fn new(opts: ConfigOptsConsul) -> Result<Self> { pub(super) fn new(opts: ConfigOptsConsul) -> Result<Self> {
let node_name = opts let node_name = opts
.node_name .node_name
.expect("'DIPLONAT_CONSUL_NODE_NAME' environment variable is required"); .expect("'DIPLONAT_CONSUL_NODE_NAME' environment variable is required");
let url = opts.url.unwrap_or(super::CONSUL_URL.to_string()); let url = opts.url.unwrap_or(super::CONSUL_URL.to_string());
let tls = match (&opts.client_cert, &opts.client_key) { let tls = match (&opts.client_cert, &opts.client_key) {
(Some(client_cert), Some(client_key)) => { (Some(client_cert), Some(client_key)) => {
let cert = match &opts.ca_cert { let cert = match &opts.ca_cert {
Some(ca_cert) => { Some(ca_cert) => {
let mut ca_cert_buf = vec![]; let mut ca_cert_buf = vec![];
File::open(ca_cert)?.read_to_end(&mut ca_cert_buf)?; File::open(ca_cert)?.read_to_end(&mut ca_cert_buf)?;
Some(reqwest::Certificate::from_pem(&ca_cert_buf[..])?) Some(reqwest::Certificate::from_pem(&ca_cert_buf[..])?)
} }
None => None, None => None,
};
let mut client_cert_buf = vec![];
File::open(client_cert)?.read_to_end(&mut client_cert_buf)?;
let mut client_key_buf = vec![];
File::open(client_key)?.read_to_end(&mut client_key_buf)?;
let ident = reqwest::Identity::from_pem(
&[&client_cert_buf[..], &client_key_buf[..]].concat()[..],
)?;
Some((cert, opts.tls_skip_verify, ident))
}
(None, None) => None,
_ => bail!("Incomplete TLS configuration parameters"),
}; };
let mut client_cert_buf = vec![]; Ok(Self {
File::open(client_cert)?.read_to_end(&mut client_cert_buf)?; node_name,
url,
let mut client_key_buf = vec![]; tls,
File::open(client_key)?.read_to_end(&mut client_key_buf)?; })
}
let ident =
reqwest::Identity::from_pem(&[&client_cert_buf[..], &client_key_buf[..]].concat()[..])?;
Some((cert, opts.tls_skip_verify, ident))
}
(None, None) => None,
_ => bail!("Incomplete TLS configuration parameters"),
};
Ok(Self {
node_name,
url,
tls,
})
}
} }
impl RuntimeConfigFirewall { impl RuntimeConfigFirewall {
pub(super) fn new(opts: ConfigOptsBase) -> Result<Self> { pub(super) fn new(opts: &ConfigOptsBase) -> Result<Self> {
let refresh_time = Duration::from_secs(opts.refresh_time.unwrap_or(super::REFRESH_TIME).into()); let refresh_time =
Duration::from_secs(opts.refresh_time.unwrap_or(super::REFRESH_TIME).into());
Ok(Self { refresh_time }) Ok(Self {
} refresh_time,
ipv6_only: opts.ipv6_only,
})
}
} }
impl RuntimeConfigIgd { impl RuntimeConfigIgd {
pub(super) fn new(opts: ConfigOptsBase) -> Result<Self> { pub(super) fn new(opts: &ConfigOptsBase) -> Result<Self> {
let private_ip = opts.private_ip; let private_ip = opts
let expiration_time = Duration::from_secs( .private_ip
opts .as_ref()
.expiration_time .map(|x| x.parse())
.unwrap_or(super::EXPIRATION_TIME) .transpose()
.into(), .context("parse private_ip")?;
); let expiration_time = Duration::from_secs(
let refresh_time = Duration::from_secs(opts.refresh_time.unwrap_or(super::REFRESH_TIME).into()); opts.expiration_time
.unwrap_or(super::EXPIRATION_TIME)
.into(),
);
let refresh_time =
Duration::from_secs(opts.refresh_time.unwrap_or(super::REFRESH_TIME).into());
if refresh_time.as_secs() * 2 > expiration_time.as_secs() { if refresh_time.as_secs() * 2 > expiration_time.as_secs() {
return Err(anyhow!( return Err(anyhow!(
"IGD expiration time (currently: {}s) must be at least twice bigger than refresh time \ "IGD expiration time (currently: {}s) must be at least twice bigger than refresh time \
(currently: {}s)", (currently: {}s)",
expiration_time.as_secs(), expiration_time.as_secs(),
refresh_time.as_secs() refresh_time.as_secs()
)); ));
} }
Ok(Self { Ok(Self {
private_ip, private_ip,
expiration_time, expiration_time,
refresh_time, refresh_time,
}) })
} }
}
impl RuntimeConfigStun {
pub(super) fn new(opts: &ConfigOptsBase) -> Result<Self> {
let mut stun_server_v4 = None;
let mut stun_server_v6 = None;
for addr in opts
.stun_server
.as_deref()
.unwrap_or(super::STUN_SERVER)
.to_socket_addrs()?
{
if addr.is_ipv4() {
stun_server_v4 = Some(addr);
}
if addr.is_ipv6() {
stun_server_v6 = Some(addr);
}
}
let refresh_time =
Duration::from_secs(opts.refresh_time.unwrap_or(super::REFRESH_TIME).into());
let stun_server_v4 = match opts.ipv6_only {
false => Some(
stun_server_v4.ok_or(anyhow!("Unable to resolve STUN server's IPv4 address"))?,
),
true => None,
};
Ok(Self {
stun_server_v4,
stun_server_v6: stun_server_v6
.ok_or(anyhow!("Unable to resolve STUN server's IPv6 address"))?,
refresh_time,
})
}
} }

117
src/consul.rs
View file

@ -7,71 +7,80 @@ use crate::config::RuntimeConfigConsul;
#[derive(Serialize, Deserialize, Debug)] #[derive(Serialize, Deserialize, Debug)]
pub struct ServiceEntry { pub struct ServiceEntry {
pub Tags: Vec<String>, #[serde(rename = "Tags")]
pub tags: Vec<String>,
} }
#[derive(Serialize, Deserialize, Debug)] #[derive(Serialize, Deserialize, Debug, Default)]
pub struct CatalogNode { pub struct CatalogNode {
pub Services: HashMap<String, ServiceEntry>, #[serde(rename = "Services")]
pub services: HashMap<String, ServiceEntry>,
} }
pub struct Consul { pub struct Consul {
client: reqwest::Client, client: reqwest::Client,
url: String, url: String,
idx: Option<u64>, idx: Option<u64>,
} }
impl Consul { impl Consul {
pub fn new(config: &RuntimeConfigConsul) -> Self { pub fn new(config: &RuntimeConfigConsul) -> Self {
let client = if let Some((ca, skip_verify, ident)) = config.tls.clone() { let client = if let Some((ca, skip_verify, ident)) = config.tls.clone() {
if skip_verify { if skip_verify {
reqwest::Client::builder() reqwest::Client::builder()
.use_rustls_tls() .use_rustls_tls()
.danger_accept_invalid_certs(true) .danger_accept_invalid_certs(true)
.identity(ident) .identity(ident)
.build() .build()
.expect("Unable to build reqwest client") .expect("Unable to build reqwest client")
} else if let Some(ca) = ca { } else if let Some(ca) = ca {
reqwest::Client::builder() reqwest::Client::builder()
.use_rustls_tls() .use_rustls_tls()
.add_root_certificate(ca) .add_root_certificate(ca)
.identity(ident) .identity(ident)
.build() .build()
.expect("Unable to build reqwest client") .expect("Unable to build reqwest client")
} else { } else {
reqwest::Client::builder() reqwest::Client::builder()
.use_rustls_tls() .use_rustls_tls()
.identity(ident) .identity(ident)
.build() .build()
.expect("Unable to build reqwest client") .expect("Unable to build reqwest client")
} }
} else { } else {
reqwest::Client::new() reqwest::Client::new()
}; };
return Self { return Self {
client, client,
url: config.url.clone(), url: config.url.clone(),
idx: None, idx: None,
}; };
} }
pub fn watch_node_reset(&mut self) -> () { pub fn watch_node_reset(&mut self) -> () {
self.idx = None; self.idx = None;
} }
pub async fn watch_node(&mut self, host: &str) -> Result<CatalogNode> { pub async fn watch_node(&mut self, host: &str) -> Result<CatalogNode> {
let url = match self.idx { let url = match self.idx {
Some(i) => format!("{}/v1/catalog/node/{}?index={}", self.url, host, i), Some(i) => format!("{}/v1/catalog/node/{}?index={}", self.url, host, i),
None => format!("{}/v1/catalog/node/{}", self.url, host), None => format!("{}/v1/catalog/node/{}", self.url, host),
}; };
let http = self.client.get(&url).send().await?; let http = self.client.get(&url).send().await?;
self.idx = match http.headers().get("X-Consul-Index") { self.idx = match http.headers().get("X-Consul-Index") {
Some(v) => Some(v.to_str()?.parse::<u64>()?), Some(v) => Some(v.to_str()?.parse::<u64>()?),
None => return Err(anyhow!("X-Consul-Index header not found")), None => return Err(anyhow!("X-Consul-Index header not found")),
}; };
let resp: CatalogNode = http.json().await?; let resp: Option<CatalogNode> = http.json().await?;
return Ok(resp); return Ok(resp.unwrap_or_default());
} }
pub async fn kv_put(&self, key: &str, bytes: Vec<u8>) -> Result<()> {
let url = format!("{}/v1/kv/{}", self.url, key);
let http = self.client.put(&url).body(bytes).send().await?;
http.error_for_status()?;
Ok(())
}
} }

153
src/consul_actor.rs
View file

@ -11,107 +11,110 @@ use crate::{consul, messages};
#[derive(Serialize, Deserialize, Debug)] #[derive(Serialize, Deserialize, Debug)]
pub enum DiplonatParameter { pub enum DiplonatParameter {
tcp_port(HashSet<u16>), #[serde(rename = "tcp_port")]
udp_port(HashSet<u16>), TcpPort(HashSet<u16>),
#[serde(rename = "udp_port")]
UdpPort(HashSet<u16>),
} }
#[derive(Serialize, Deserialize, Debug)] #[derive(Serialize, Deserialize, Debug)]
pub enum DiplonatConsul { pub enum DiplonatConsul {
diplonat(Vec<DiplonatParameter>), #[serde(rename = "diplonat")]
Diplonat(Vec<DiplonatParameter>),
} }
pub struct ConsulActor { pub struct ConsulActor {
pub rx_open_ports: watch::Receiver<messages::PublicExposedPorts>, pub rx_open_ports: watch::Receiver<messages::PublicExposedPorts>,
consul: consul::Consul, consul: consul::Consul,
node: String, node: String,
retries: u32, retries: u32,
tx_open_ports: watch::Sender<messages::PublicExposedPorts>, tx_open_ports: watch::Sender<messages::PublicExposedPorts>,
} }
fn retry_to_time(retries: u32, max_time: Duration) -> Duration { fn retry_to_time(retries: u32, max_time: Duration) -> Duration {
// 1.2^x seems to be a good value to exponentially increase time at a good pace // 1.2^x seems to be a good value to exponentially increase time at a good pace
// eg. 1.2^32 = 341 seconds ~= 5 minutes - ie. after 32 retries we wait 5 // eg. 1.2^32 = 341 seconds ~= 5 minutes - ie. after 32 retries we wait 5
// minutes // minutes
return Duration::from_secs(cmp::min( return Duration::from_secs(cmp::min(
max_time.as_secs(), max_time.as_secs(),
1.2f64.powf(retries as f64) as u64, 1.2f64.powf(retries as f64) as u64,
)); ));
} }
fn to_parameters(catalog: &consul::CatalogNode) -> Vec<DiplonatConsul> { fn to_parameters(catalog: &consul::CatalogNode) -> Vec<DiplonatConsul> {
let mut r = Vec::new(); let mut r = Vec::new();
for (_, service_info) in &catalog.Services { for (_, service_info) in &catalog.services {
for tag in &service_info.Tags { for tag in &service_info.tags {
let diplo_conf: error::Result<DiplonatConsul> = from_str(tag); let diplo_conf: error::Result<DiplonatConsul> = from_str(tag);
match diplo_conf { match diplo_conf {
Ok(conf) => r.push(conf), Ok(conf) => r.push(conf),
Err(e) => debug!("Failed to parse entry {}. {}", tag, e), Err(e) => debug!("Failed to parse entry {}. {}", tag, e),
}; };
}
} }
}
return r; return r;
} }
fn to_open_ports(params: &Vec<DiplonatConsul>) -> messages::PublicExposedPorts { fn to_open_ports(params: &Vec<DiplonatConsul>) -> messages::PublicExposedPorts {
let mut op = messages::PublicExposedPorts { let mut op = messages::PublicExposedPorts {
tcp_ports: HashSet::new(), tcp_ports: HashSet::new(),
udp_ports: HashSet::new(), udp_ports: HashSet::new(),
}; };
for conf in params { for conf in params {
let DiplonatConsul::diplonat(c) = conf; let DiplonatConsul::Diplonat(c) = conf;
for parameter in c { for parameter in c {
match parameter { match parameter {
DiplonatParameter::tcp_port(p) => op.tcp_ports.extend(p), DiplonatParameter::TcpPort(p) => op.tcp_ports.extend(p),
DiplonatParameter::udp_port(p) => op.udp_ports.extend(p), DiplonatParameter::UdpPort(p) => op.udp_ports.extend(p),
}; };
}
} }
}
return op; return op;
} }
impl ConsulActor { impl ConsulActor {
pub fn new(config: &RuntimeConfigConsul, node: &str) -> Self { pub fn new(config: &RuntimeConfigConsul, node: &str) -> Self {
let (tx, rx) = watch::channel(messages::PublicExposedPorts { let (tx, rx) = watch::channel(messages::PublicExposedPorts {
tcp_ports: HashSet::new(), tcp_ports: HashSet::new(),
udp_ports: HashSet::new(), udp_ports: HashSet::new(),
}); });
return Self { return Self {
consul: consul::Consul::new(config), consul: consul::Consul::new(config),
rx_open_ports: rx, rx_open_ports: rx,
tx_open_ports: tx, tx_open_ports: tx,
node: node.to_string(), node: node.to_string(),
retries: 0, retries: 0,
}; };
} }
pub async fn listen(&mut self) -> Result<()> { pub async fn listen(&mut self) -> Result<()> {
loop { loop {
let catalog = match self.consul.watch_node(&self.node).await { let catalog = match self.consul.watch_node(&self.node).await {
Ok(c) => c, Ok(c) => c,
Err(e) => { Err(e) => {
self.consul.watch_node_reset(); self.consul.watch_node_reset();
self.retries = cmp::min(std::u32::MAX - 1, self.retries) + 1; self.retries = cmp::min(std::u32::MAX - 1, self.retries) + 1;
let will_retry_in = retry_to_time(self.retries, Duration::from_secs(600)); let will_retry_in = retry_to_time(self.retries, Duration::from_secs(600));
error!( error!(
"Failed to query consul. Will retry in {}s. {}", "Failed to query consul. Will retry in {}s. {}",
will_retry_in.as_secs(), will_retry_in.as_secs(),
e e
); );
sleep(will_retry_in).await; sleep(will_retry_in).await;
continue; continue;
} }
}; };
self.retries = 0; self.retries = 0;
let msg = to_open_ports(&to_parameters(&catalog)); let msg = to_open_ports(&to_parameters(&catalog));
debug!("Extracted configuration: {:#?}", msg); debug!("Extracted configuration: {:#?}", msg);
self.tx_open_ports.send(msg)?; self.tx_open_ports.send(msg)?;
}
} }
}
} }

93
src/diplonat.rs
View file

@ -1,49 +1,78 @@
use anyhow::Result; use anyhow::{Context, Result};
use futures::future::FutureExt;
use tokio::try_join; use tokio::try_join;
use crate::{ use crate::{
config::ConfigOpts, consul_actor::ConsulActor, fw_actor::FirewallActor, igd_actor::IgdActor, config::ConfigOpts, consul_actor::ConsulActor, fw_actor::FirewallActor, igd_actor::IgdActor,
stun_actor::StunActor,
}; };
pub struct Diplonat { pub struct Diplonat {
consul: ConsulActor, consul: ConsulActor,
firewall: FirewallActor, firewall: FirewallActor,
igd: IgdActor, igd: Option<IgdActor>,
stun: StunActor,
} }
impl Diplonat { impl Diplonat {
pub async fn new() -> Result<Self> { pub async fn new() -> Result<Self> {
let rt_cfg = ConfigOpts::from_env()?; let rt_cfg = ConfigOpts::from_env().context("Parse configuration")?;
println!("{:#?}", rt_cfg); println!("{:#?}", rt_cfg);
let ca = ConsulActor::new(&rt_cfg.consul, &rt_cfg.consul.node_name); let ca = ConsulActor::new(&rt_cfg.consul, &rt_cfg.consul.node_name);
let fw = FirewallActor::new(rt_cfg.firewall.refresh_time, &ca.rx_open_ports).await?; let fw = FirewallActor::new(
rt_cfg.firewall.ipv6_only,
rt_cfg.firewall.refresh_time,
&ca.rx_open_ports,
)
.await
.context("Setup fireall actor")?;
let ia = IgdActor::new( let ia = match rt_cfg.igd {
rt_cfg.igd.private_ip.as_ref().map(String::as_str), Some(igdc) => Some(
rt_cfg.igd.refresh_time, IgdActor::new(
rt_cfg.igd.expiration_time, igdc.private_ip,
&ca.rx_open_ports, igdc.refresh_time,
) igdc.expiration_time,
.await?; &ca.rx_open_ports,
)
.await
.context("Setup IGD actor")?,
),
None => None,
};
let ctx = Self { let sa = StunActor::new(&rt_cfg.consul, &rt_cfg.stun, &rt_cfg.consul.node_name);
consul: ca,
igd: ia,
firewall: fw,
};
return Ok(ctx); let ctx = Self {
} consul: ca,
igd: ia,
firewall: fw,
stun: sa,
};
pub async fn listen(&mut self) -> Result<()> { Ok(ctx)
try_join!( }
self.consul.listen(),
self.igd.listen(),
self.firewall.listen()
)?;
return Ok(()); pub async fn listen(&mut self) -> Result<()> {
} let igd_opt = &mut self.igd;
try_join!(
self.consul.listen().map(|x| x.context("Run consul actor")),
async {
if let Some(igd) = igd_opt {
igd.listen().await.context("Run IGD actor")
} else {
Ok(())
}
},
self.firewall
.listen()
.map(|x| x.context("Run firewall actor")),
self.stun.listen().map(|x| x.context("Run STUN actor")),
)?;
Ok(())
}
} }

138
src/fw.rs
View file

@ -8,92 +8,96 @@ use regex::Regex;
use crate::messages; use crate::messages;
pub fn setup(ipt: &iptables::IPTables) -> Result<()> { pub fn setup(ipt: &iptables::IPTables) -> Result<()> {
// ensure we start from a clean state without any rule already set // ensure we start from a clean state without any rule already set
cleanup(ipt)?; cleanup(ipt)?;
ipt info!("{}: creating DIPLONAT chain", ipt.cmd);
.new_chain("filter", "DIPLONAT") ipt.new_chain("filter", "DIPLONAT")
.context("Failed to create new chain")?; .context("Failed to create new chain")?;
ipt ipt.insert_unique("filter", "INPUT", "-j DIPLONAT", 1)
.insert_unique("filter", "INPUT", "-j DIPLONAT", 1) .context("Failed to insert jump rule")?;
.context("Failed to insert jump rule")?;
Ok(()) Ok(())
} }
pub fn open_ports(ipt: &iptables::IPTables, ports: messages::PublicExposedPorts) -> Result<()> { pub fn open_ports(ipt: &iptables::IPTables, ports: messages::PublicExposedPorts) -> Result<()> {
for p in ports.tcp_ports { for p in ports.tcp_ports {
ipt info!("{}: opening TCP port {}", ipt.cmd, p);
.append( ipt.append(
"filter", "filter",
"DIPLONAT", "DIPLONAT",
&format!("-p tcp --dport {} -j ACCEPT", p), &format!("-p tcp --dport {} -j ACCEPT", p),
) )
.context("Failed to insert port rule")?; .context("Failed to insert port rule")?;
} }
for p in ports.udp_ports { for p in ports.udp_ports {
ipt info!("{}: opening UDP port {}", ipt.cmd, p);
.append( ipt.append(
"filter", "filter",
"DIPLONAT", "DIPLONAT",
&format!("-p udp --dport {} -j ACCEPT", p), &format!("-p udp --dport {} -j ACCEPT", p),
) )
.context("Failed to insert port rule")?; .context("Failed to insert port rule")?;
} }
Ok(()) Ok(())
} }
pub fn get_opened_ports(ipt: &iptables::IPTables) -> Result<messages::PublicExposedPorts> { pub fn get_opened_ports(ipt: &iptables::IPTables) -> Result<messages::PublicExposedPorts> {
let mut ports = messages::PublicExposedPorts { let mut ports = messages::PublicExposedPorts {
tcp_ports: HashSet::new(), tcp_ports: HashSet::new(),
udp_ports: HashSet::new(), udp_ports: HashSet::new(),
}; };
let list = ipt.list("filter", "DIPLONAT")?; let list = ipt.list("filter", "DIPLONAT")?;
let re = Regex::new(r"\-A.*? \-p (\w+).*\-\-dport (\d+).*?\-j ACCEPT") let re = Regex::new(r"\-A.*? \-p (\w+).*\-\-dport (\d+).*?\-j ACCEPT")
.context("Regex matching open ports encountered an unexpected rule")?; .context("Regex matching open ports encountered an unexpected rule")?;
for i in list { for i in list {
let caps = re.captures(&i); debug!("{} list DIPLONAT: got {}", ipt.cmd, i);
match caps { let caps = re.captures(&i);
Some(c) => { match caps {
if let (Some(raw_proto), Some(raw_port)) = (c.get(1), c.get(2)) { Some(c) => {
let proto = String::from(raw_proto.as_str()); if let (Some(raw_proto), Some(raw_port)) = (c.get(1), c.get(2)) {
let number = String::from(raw_port.as_str()).parse::<u16>()?; let proto = String::from(raw_proto.as_str());
let number = String::from(raw_port.as_str()).parse::<u16>()?;
if proto == "tcp" { if proto == "tcp" || proto == "6" {
ports.tcp_ports.insert(number); ports.tcp_ports.insert(number);
} else { } else if proto == "udp" || proto == "17" {
ports.udp_ports.insert(number); ports.udp_ports.insert(number);
} } else {
} else { error!("Unexpected protocol in iptables rule: {}", proto);
error!("Unexpected rule found in DIPLONAT chain") }
} else {
error!("Unexpected rule found in DIPLONAT chain")
}
}
_ => {
debug!("{} rule not parsed: {}", ipt.cmd, i);
}
} }
}
_ => {}
} }
}
Ok(ports) debug!("{} ports already openned: {:?}", ipt.cmd, ports);
Ok(ports)
} }
pub fn cleanup(ipt: &iptables::IPTables) -> Result<()> { pub fn cleanup(ipt: &iptables::IPTables) -> Result<()> {
if ipt.chain_exists("filter", "DIPLONAT")? { if ipt.chain_exists("filter", "DIPLONAT")? {
ipt info!("{}: removing old DIPLONAT chain", ipt.cmd);
.flush_chain("filter", "DIPLONAT") ipt.flush_chain("filter", "DIPLONAT")
.context("Failed to flush the DIPLONAT chain")?; .context("Failed to flush the DIPLONAT chain")?;
if ipt.exists("filter", "INPUT", "-j DIPLONAT")? { if ipt.exists("filter", "INPUT", "-j DIPLONAT")? {
ipt ipt.delete("filter", "INPUT", "-j DIPLONAT")
.delete("filter", "INPUT", "-j DIPLONAT") .context("Failed to delete jump rule")?;
.context("Failed to delete jump rule")?; }
ipt.delete_chain("filter", "DIPLONAT")
.context("Failed to delete chain")?;
} }
ipt Ok(())
.delete_chain("filter", "DIPLONAT")
.context("Failed to delete chain")?;
}
Ok(())
} }

156
src/fw_actor.rs
View file

@ -4,88 +4,100 @@ use anyhow::Result;
use iptables; use iptables;
use log::*; use log::*;
use tokio::{ use tokio::{
select, select,
sync::watch, sync::watch,
time::{self, Duration}, time::{self, Duration},
}; };
use crate::{fw, messages}; use crate::{fw, messages};
pub struct FirewallActor { pub struct FirewallActor {
pub ipt_v4: iptables::IPTables, pub ipt_v4: Option<iptables::IPTables>,
pub ipt_v6: iptables::IPTables, pub ipt_v6: iptables::IPTables,
rx_ports: watch::Receiver<messages::PublicExposedPorts>, rx_ports: watch::Receiver<messages::PublicExposedPorts>,
last_ports: messages::PublicExposedPorts, last_ports: messages::PublicExposedPorts,
refresh: Duration, refresh: Duration,
} }
impl FirewallActor { impl FirewallActor {
pub async fn new( pub async fn new(
refresh: Duration, ipv6_only: bool,
rxp: &watch::Receiver<messages::PublicExposedPorts>, refresh: Duration,
) -> Result<Self> { rxp: &watch::Receiver<messages::PublicExposedPorts>,
let ctx = Self { ) -> Result<Self> {
ipt_v4: iptables::new(false)?, let ctx = Self {
ipt_v6: iptables::new(true)?, ipt_v4: match ipv6_only {
rx_ports: rxp.clone(), false => Some(iptables::new(false)?),
last_ports: messages::PublicExposedPorts::new(), true => None,
refresh, },
}; ipt_v6: iptables::new(true)?,
rx_ports: rxp.clone(),
last_ports: messages::PublicExposedPorts::new(),
refresh,
};
fw::setup(&ctx.ipt_v4)?; if let Some(ipt_v4) = &ctx.ipt_v4 {
fw::setup(&ctx.ipt_v6)?; fw::setup(ipt_v4)?;
}
fw::setup(&ctx.ipt_v6)?;
return Ok(ctx); return Ok(ctx);
}
pub async fn listen(&mut self) -> Result<()> {
let mut interval = time::interval(self.refresh);
loop {
// 1. Wait for an event
let new_ports = select! {
_ = self.rx_ports.changed() => Some(self.rx_ports.borrow().clone()),
_ = interval.tick() => None,
else => return Ok(()) // Sender dropped, terminate loop.
};
// 2. Update last ports if needed
if let Some(p) = new_ports {
self.last_ports = p;
}
// 3. Update firewall rules
match self.do_fw_update().await {
Ok(()) => debug!("Successfully updated firewall rules"),
Err(e) => error!("An error occured while updating firewall rules. {}", e),
}
}
}
pub async fn do_fw_update(&self) -> Result<()> {
for ipt in [&self.ipt_v4, &self.ipt_v6] {
let curr_opened_ports = fw::get_opened_ports(ipt)?;
let diff_tcp = self
.last_ports
.tcp_ports
.difference(&curr_opened_ports.tcp_ports)
.copied()
.collect::<HashSet<u16>>();
let diff_udp = self
.last_ports
.udp_ports
.difference(&curr_opened_ports.udp_ports)
.copied()
.collect::<HashSet<u16>>();
let ports_to_open = messages::PublicExposedPorts {
tcp_ports: diff_tcp,
udp_ports: diff_udp,
};
fw::open_ports(ipt, ports_to_open)?;
} }
return Ok(()); pub async fn listen(&mut self) -> Result<()> {
} let mut interval = time::interval(self.refresh);
loop {
// 1. Wait for an event
let new_ports = select! {
_ = self.rx_ports.changed() => Some(self.rx_ports.borrow().clone()),
_ = interval.tick() => None,
else => return Ok(()) // Sender dropped, terminate loop.
};
// 2. Update last ports if needed
if let Some(p) = new_ports {
self.last_ports = p;
}
// 3. Update firewall rules
match self.do_fw_update().await {
Ok(()) => debug!("Successfully updated firewall rules"),
Err(e) => error!("An error occured while updating firewall rules. {}", e),
}
}
}
pub async fn do_fw_update(&self) -> Result<()> {
if let Some(ipt_v4) = &self.ipt_v4 {
self.do_fw_update_on(ipt_v4).await?;
}
self.do_fw_update_on(&self.ipt_v6).await?;
Ok(())
}
pub async fn do_fw_update_on(&self, ipt: &iptables::IPTables) -> Result<()> {
let curr_opened_ports = fw::get_opened_ports(ipt)?;
let diff_tcp = self
.last_ports
.tcp_ports
.difference(&curr_opened_ports.tcp_ports)
.copied()
.collect::<HashSet<u16>>();
let diff_udp = self
.last_ports
.udp_ports
.difference(&curr_opened_ports.udp_ports)
.copied()
.collect::<HashSet<u16>>();
let ports_to_open = messages::PublicExposedPorts {
tcp_ports: diff_tcp,
udp_ports: diff_udp,
};
fw::open_ports(ipt, ports_to_open)?;
return Ok(());
}
} }

210
src/igd_actor.rs
View file

@ -1,126 +1,122 @@
use std::net::SocketAddrV4; use std::net::{Ipv4Addr, SocketAddrV4};
use anyhow::{Context, Result}; use anyhow::{Context, Result};
use igd::{aio::*, PortMappingProtocol}; use igd::{aio::*, PortMappingProtocol};
use log::*; use log::*;
use tokio::{ use tokio::{
select, select,
sync::watch, sync::watch,
time::{self, Duration}, time::{self, Duration},
}; };
use crate::messages; use crate::messages;
pub struct IgdActor { pub struct IgdActor {
last_ports: messages::PublicExposedPorts, last_ports: messages::PublicExposedPorts,
rx_ports: watch::Receiver<messages::PublicExposedPorts>, rx_ports: watch::Receiver<messages::PublicExposedPorts>,
gateway: Gateway, gateway: Gateway,
refresh: Duration, refresh: Duration,
expire: Duration, expire: Duration,
private_ip: String, private_ip: Ipv4Addr,
} }
impl IgdActor { impl IgdActor {
pub async fn new( pub async fn new(
priv_ip: Option<&str>, priv_ip: Option<Ipv4Addr>,
refresh: Duration, refresh: Duration,
expire: Duration, expire: Duration,
rxp: &watch::Receiver<messages::PublicExposedPorts>, rxp: &watch::Receiver<messages::PublicExposedPorts>,
) -> Result<Self> { ) -> Result<Self> {
let gw = search_gateway(Default::default()) let gw = search_gateway(Default::default())
.await .await
.context("Failed to find IGD gateway")?; .context("Failed to find IGD gateway")?;
info!("IGD gateway: {}", gw); info!("IGD gateway: {}", gw);
let private_ip = if let Some(ip) = priv_ip { let private_ip = if let Some(ip) = priv_ip {
info!("Using private IP from config: {}", ip); info!("Using private IP from config: {}", ip);
ip.to_string() ip
} else { } else {
info!("Trying to automatically detect private IP"); info!("Trying to automatically detect private IP");
let gwa = gw.addr.ip().octets(); let gwa = gw.addr.ip().octets();
let cmplen = match gwa { let cmplen = match gwa {
[192, 168, _, _] => 3, [192, 168, _, _] => 3,
[10, _, _, _] => 2, [10, _, _, _] => 2,
_ => panic!( _ => panic!(
"Gateway IP does not appear to be in a local network ({})", "Gateway IP does not appear to be in a local network ({})",
gw.addr.ip() gw.addr.ip()
), ),
}; };
let public_ip = get_if_addrs::get_if_addrs()? #[allow(unused_parens)]
.into_iter() let private_ip = get_if_addrs::get_if_addrs()?
.map(|i| i.addr.ip()) .into_iter()
.filter(|a| match a { .map(|i| i.addr.ip())
std::net::IpAddr::V4(a4) => (a4.octets()[..cmplen] == gwa[..cmplen]), .filter_map(|a| match a {
_ => false, std::net::IpAddr::V4(a4) if a4.octets()[..cmplen] == gwa[..cmplen] => Some(a4),
}) _ => None,
.next() })
.expect("No interface has an IP on same subnet as gateway") .next()
.to_string(); .expect("No interface has an IP on same subnet as gateway");
info!("Found private IP: {}", public_ip); info!("Autodetected private IP: {}", private_ip);
public_ip private_ip
}; };
let ctx = Self { let ctx = Self {
gateway: gw, gateway: gw,
rx_ports: rxp.clone(), rx_ports: rxp.clone(),
private_ip, private_ip,
refresh: refresh, refresh: refresh,
expire: expire, expire: expire,
last_ports: messages::PublicExposedPorts::new(), last_ports: messages::PublicExposedPorts::new(),
}; };
return Ok(ctx); return Ok(ctx);
}
pub async fn listen(&mut self) -> Result<()> {
let mut interval = time::interval(self.refresh);
loop {
// 1. Wait for an event
let new_ports = select! {
_ = self.rx_ports.changed() => Some(self.rx_ports.borrow().clone()),
_ = interval.tick() => None,
else => return Ok(()) // Sender dropped, terminate loop.
};
// 2. Update last ports if needed
if let Some(p) = new_ports {
self.last_ports = p;
}
// 3. Flush IGD requests
match self.do_igd().await {
Ok(()) => debug!("Successfully updated IGD"),
Err(e) => error!("An error occured while updating IGD. {}", e),
}
}
}
pub async fn do_igd(&self) -> Result<()> {
let actions = [
(PortMappingProtocol::TCP, &self.last_ports.tcp_ports),
(PortMappingProtocol::UDP, &self.last_ports.udp_ports),
];
for (proto, list) in actions.iter() {
for port in *list {
let service_str = format!("{}:{}", self.private_ip, port);
let service = service_str
.parse::<SocketAddrV4>()
.context("Invalid socket address")?;
self
.gateway
.add_port(
*proto,
*port,
service,
self.expire.as_secs() as u32,
"diplonat",
)
.await?;
debug!("IGD request successful for {:#?} {}", proto, service);
}
} }
return Ok(()); pub async fn listen(&mut self) -> Result<()> {
} let mut interval = time::interval(self.refresh);
loop {
// 1. Wait for an event
let new_ports = select! {
_ = self.rx_ports.changed() => Some(self.rx_ports.borrow().clone()),
_ = interval.tick() => None,
else => return Ok(()) // Sender dropped, terminate loop.
};
// 2. Update last ports if needed
if let Some(p) = new_ports {
self.last_ports = p;
}
// 3. Flush IGD requests
match self.do_igd().await {
Ok(()) => debug!("Successfully updated IGD"),
Err(e) => error!("An error occured while updating IGD. {}", e),
}
}
}
pub async fn do_igd(&self) -> Result<()> {
let actions = [
(PortMappingProtocol::TCP, &self.last_ports.tcp_ports),
(PortMappingProtocol::UDP, &self.last_ports.udp_ports),
];
for (proto, list) in actions.iter() {
for port in *list {
let service = SocketAddrV4::new(self.private_ip, *port);
self.gateway
.add_port(
*proto,
*port,
service,
self.expire.as_secs() as u32,
"diplonat",
)
.await?;
debug!("IGD request successful for {:#?} {}", proto, service);
}
}
return Ok(());
}
} }

13
src/main.rs
View file

@ -6,15 +6,20 @@ mod fw;
mod fw_actor; mod fw_actor;
mod igd_actor; mod igd_actor;
mod messages; mod messages;
mod stun_actor;
use diplonat::Diplonat; use diplonat::Diplonat;
use log::*; use log::*;
#[tokio::main] #[tokio::main]
async fn main() { async fn main() {
pretty_env_logger::init(); pretty_env_logger::init();
info!("Starting Diplonat"); info!("Starting Diplonat");
let mut diplo = Diplonat::new().await.expect("Setup failed"); Diplonat::new()
diplo.listen().await.expect("A runtime error occured"); .await
.expect("Setup failed")
.listen()
.await
.expect("A runtime error occured");
} }

16
src/messages.rs
View file

@ -2,15 +2,15 @@ use std::collections::HashSet;
#[derive(Debug, Clone, PartialEq, Eq)] #[derive(Debug, Clone, PartialEq, Eq)]
pub struct PublicExposedPorts { pub struct PublicExposedPorts {
pub tcp_ports: HashSet<u16>, pub tcp_ports: HashSet<u16>,
pub udp_ports: HashSet<u16>, pub udp_ports: HashSet<u16>,
} }
impl PublicExposedPorts { impl PublicExposedPorts {
pub fn new() -> Self { pub fn new() -> Self {
return Self { return Self {
tcp_ports: HashSet::new(), tcp_ports: HashSet::new(),
udp_ports: HashSet::new(), udp_ports: HashSet::new(),
}; };
} }
} }

147
src/stun_actor.rs Normal file
View file

@ -0,0 +1,147 @@
use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr};
use std::time::{Duration, SystemTime};
use anyhow::{anyhow, bail, Result};
use log::*;
use serde::{Deserialize, Serialize};
use crate::config::{RuntimeConfigConsul, RuntimeConfigStun};
use crate::consul;
pub struct StunActor {
node: String,
consul: consul::Consul,
stun_server_v4: Option<SocketAddr>,
stun_server_v6: SocketAddr,
refresh_time: Duration,
}
#[derive(Serialize, Deserialize, Debug)]
pub struct AutodiscoverResult {
pub timestamp: u64,
pub address: Option<IpAddr>,
}
impl StunActor {
pub fn new(
consul_config: &RuntimeConfigConsul,
stun_config: &RuntimeConfigStun,
node: &str,
) -> Self {
assert!(stun_config
.stun_server_v4
.map(|x| x.is_ipv4())
.unwrap_or(true));
assert!(stun_config.stun_server_v6.is_ipv6());
Self {
consul: consul::Consul::new(consul_config),
node: node.to_string(),
stun_server_v4: stun_config.stun_server_v4,
stun_server_v6: stun_config.stun_server_v6,
refresh_time: stun_config.refresh_time,
}
}
pub async fn listen(&mut self) -> Result<()> {
loop {
let ipv4_result = match self.stun_server_v4 {
Some(stun_server_v4) => self.autodiscover_ip(stun_server_v4).await,
None => self.autodiscover_none_ipv4().await,
};
if let Err(e) = ipv4_result {
error!("Unable to autodiscover IPv4 address: {}", e);
}
if let Err(e) = self.autodiscover_ip(self.stun_server_v6).await {
error!("Unable to autodiscover IPv6 address: {}", e);
}
tokio::time::sleep(self.refresh_time).await;
}
}
async fn autodiscover_ip(&self, stun_server: SocketAddr) -> Result<()> {
let binding_ip = match stun_server.is_ipv4() {
true => IpAddr::V4(Ipv4Addr::UNSPECIFIED), // 0.0.0.0
false => IpAddr::V6(Ipv6Addr::UNSPECIFIED), // [::]
};
let binding_addr = SocketAddr::new(binding_ip, 0);
let discovered_addr = get_mapped_addr(stun_server, binding_addr)
.await?
.map(|x| x.ip());
let consul_key = match stun_server.is_ipv4() {
true => {
debug!("Autodiscovered IPv4: {:?}", discovered_addr);
format!("diplonat/autodiscovery/ipv4/{}", self.node)
}
false => {
debug!("Autodiscovered IPv6: {:?}", discovered_addr);
format!("diplonat/autodiscovery/ipv6/{}", self.node)
}
};
self.consul
.kv_put(
&consul_key,
serde_json::to_vec(&AutodiscoverResult {
timestamp: timestamp(),
address: discovered_addr,
})?,
)
.await?;
Ok(())
}
async fn autodiscover_none_ipv4(&self) -> Result<()> {
let consul_key = format!("diplonat/autodiscovery/ipv4/{}", self.node);
self.consul
.kv_put(
&consul_key,
serde_json::to_vec(&AutodiscoverResult {
timestamp: timestamp(),
address: None,
})?,
)
.await?;
Ok(())
}
}
async fn get_mapped_addr(
stun_server: SocketAddr,
binding_addr: SocketAddr,
) -> Result<Option<SocketAddr>> {
use stun_client::*;
let mut client = Client::new(binding_addr, None).await?;
let res = match client.binding_request(stun_server, None).await {
Err(e) => {
info!(
"STUN binding request to {} failed, assuming no address (error: {})",
binding_addr, e
);
return Ok(None);
}
Ok(r) => r,
};
if res.get_class() != Class::SuccessResponse {
bail!("STUN server did not responde with a success response");
}
let xor_mapped_addr = Attribute::get_xor_mapped_address(&res)
.ok_or(anyhow!("no XorMappedAddress found in STUN response"))?;
Ok(Some(xor_mapped_addr))
}
fn timestamp() -> u64 {
SystemTime::now()
.duration_since(SystemTime::UNIX_EPOCH)
.expect("clock error")
.as_secs()
}