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Logs for server resolution

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Timo Kösters 2023-02-23 12:28:15 +01:00
parent b7c99788e4
commit cb0ce5b08f
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GPG key ID: 0B25E636FBA7E4CB
1 changed files with 26 additions and 24 deletions
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42
src/api/server_server.rs
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@ -340,36 +340,38 @@ fn add_port_to_hostname(destination_str: &str) -> FedDest {
/// Implemented according to the specification at https://matrix.org/docs/spec/server_server/r0.1.4#resolving-server-names
/// Numbers in comments below refer to bullet points in linked section of specification
async fn find_actual_destination(destination: &'_ ServerName) -> (FedDest, FedDest) {
info!("Finding actual destination for {destination}");
let destination_str = destination.as_str().to_owned();
let mut hostname = destination_str.clone();
let actual_destination = match get_ip_with_port(&destination_str) {
Some(host_port) => {
// 1: IP literal with provided or default port
info!("1: IP literal with provided or default port");
host_port
}
None => {
if let Some(pos) = destination_str.find(':') {
// 2: Hostname with included port
info!("2: Hostname with included port");
let (host, port) = destination_str.split_at(pos);
FedDest::Named(host.to_owned(), port.to_owned())
} else {
info!("Requesting well known for {destination}");
match request_well_known(destination.as_str()).await {
// 3: A .well-known file is available
Some(delegated_hostname) => {
info!("3: A .well-known file is available");
hostname = add_port_to_hostname(&delegated_hostname).into_uri_string();
match get_ip_with_port(&delegated_hostname) {
Some(host_and_port) => host_and_port, // 3.1: IP literal in .well-known file
None => {
if let Some(pos) = delegated_hostname.find(':') {
// 3.2: Hostname with port in .well-known file
info!("3.2: Hostname with port in .well-known file");
let (host, port) = delegated_hostname.split_at(pos);
FedDest::Named(host.to_owned(), port.to_owned())
} else {
// Delegated hostname has no port in this branch
info!("Delegated hostname has no port in this branch");
if let Some(hostname_override) =
query_srv_record(&delegated_hostname).await
{
// 3.3: SRV lookup successful
info!("3.3: SRV lookup successful");
let force_port = hostname_override.port();
if let Ok(override_ip) = services()
@ -400,18 +402,18 @@ async fn find_actual_destination(destination: &'_ ServerName) -> (FedDest, FedDe
add_port_to_hostname(&delegated_hostname)
}
} else {
// 3.4: No SRV records, just use the hostname from .well-known
info!("3.4: No SRV records, just use the hostname from .well-known");
add_port_to_hostname(&delegated_hostname)
}
}
}
}
}
// 4: No .well-known or an error occured
None => {
info!("4: No .well-known or an error occured");
match query_srv_record(&destination_str).await {
// 4: SRV record found
Some(hostname_override) => {
info!("4: SRV record found");
let force_port = hostname_override.port();
if let Ok(override_ip) = services()
@ -442,14 +444,17 @@ async fn find_actual_destination(destination: &'_ ServerName) -> (FedDest, FedDe
add_port_to_hostname(&hostname)
}
}
// 5: No SRV record found
None => add_port_to_hostname(&destination_str),
None => {
info!("5: No SRV record found");
add_port_to_hostname(&destination_str)
}
}
}
}
}
}
};
info!("Actual destination: {actual_destination:?}");
// Can't use get_ip_with_port here because we don't want to add a port
// to an IP address if it wasn't specified
@ -488,19 +493,16 @@ async fn query_srv_record(hostname: &'_ str) -> Option<FedDest> {
}
async fn request_well_known(destination: &str) -> Option<String> {
let body: serde_json::Value = serde_json::from_str(
&services()
let response = services()
.globals
.default_client()
.get(&format!("https://{destination}/.well-known/matrix/server"))
.send()
.await
.ok()?
.text()
.await
.ok()?,
)
.ok()?;
.await;
info!("Got well known response");
let text = response.ok()?.text().await;
info!("Got well known response text");
let body: serde_json::Value = serde_json::from_str(&text.ok()?).ok()?;
Some(body.get("m.server")?.as_str()?.to_owned())
}