eculocate

commit f5a1064264171d17698935a914f5fb01a6ca60e1
parent 7696ac0277cdd685429501da59c1675444a93ee0
Author: Daniel Barlow <dan@telent.net>
Date:   Wed, 31 Dec 2025 23:48:28 +0000

add optional suffix to dns record names

this is in preparation for handling probe failures (name collisions)

Diffstat:
M
ecu-esp32/src/wifi.rs
 | 
42
++++++++++++++++++++++--------------------

1 file changed, 22 insertions(+), 20 deletions(-)
diff --git a/ecu-esp32/src/wifi.rs b/ecu-esp32/src/wifi.rs
@@ -5,6 +5,7 @@
 // use alloc::vec;
 use alloc::vec::Vec;
 use alloc::string::String;
+use alloc::format;
 use alloc::collections::BTreeSet;
 use crate::alloc::string::ToString;
 
@@ -94,7 +95,7 @@ impl<'a> MdnsResponder<'a> {
 
 	Self {
 	    sock,
-	    database: DnsDatabase::create(my_address),
+	    database: DnsDatabase::create(my_address, None),
 	}
     }
 
@@ -374,31 +375,32 @@ struct DnsDatabase {
 }
 
 impl DnsDatabase {
-    fn create(my_ip_address : [u8; 4]) -> Self {
+    fn create(my_ip_address : [u8; 4], serial: Option<u8>) -> Self {
+	let (hostname, ptr_name) =
+	    match serial {
+		None => (
+		    String::from("eculogical.local"),
+		    String::from("Bike._keihin._udp.local")
+		),
+		Some(number) => (
+		    format!("eculogical{number}.local"),
+		    format!("Bike ({number})._keihin._udp.local")
+		)
+	    };
+
+
 	let static_records = [
+	    DnsResource::new(&hostname, RData::A(my_ip_address)),
 	    DnsResource::new(
-		"eculogical.local",
-		RData::A(my_ip_address)
-	    ),
-	    DnsResource::new(
-		"Bike._keihin._udp.local",
+		&ptr_name,
 		RData::Srv {
-		    target: String::from("eculogical.local"), port: 5000,
+		    target: String::from(hostname), port: 5000,
 		    weight: 0, priority: 0
 		}
 	    ),
-	    DnsResource::new(
-		"Bike._keihin._udp.local",
-		RData::Txt(["txtvers=1".into()].into())
-	    ),
-	    DnsResource::new(
-		"_keihin._udp.local",
-		RData::Ptr("Bike._keihin._udp.local".into())
-	    ),
-	    DnsResource::new(
-		DISCOVERY_NAME,
-		RData::Ptr("_keihin._udp.local".into())
-	    )
+	    DnsResource::new(&ptr_name, RData::Txt(["txtvers=1".into()].into())),
+	    DnsResource::new("_keihin._udp.local", RData::Ptr(ptr_name)),
+	    DnsResource::new(DISCOVERY_NAME, RData::Ptr("_keihin._udp.local".into()))
 	];
 	Self { records: Vec::from(static_records) }
     }