eculocate

commit 2e77ffb56c1b720e242173f162e668ab5e00dadc
parent aa4eb246a9c42005e325e319dc90c2f63c4c23de
Author: Daniel Barlow <dan@telent.net>
Date:   Fri, 26 Dec 2025 21:43:47 +0000

extract helper to encode dotted name as label

Diffstat:
M
ecu-esp32/src/wifi.rs
 | 
34
++++++++++++++++------------------

1 file changed, 16 insertions(+), 18 deletions(-)
diff --git a/ecu-esp32/src/wifi.rs b/ecu-esp32/src/wifi.rs
@@ -74,6 +74,20 @@ enum RData {
 }
 
 impl RData {
+    fn encode_as_label<'a>(name: &str, out: &'a mut [u8], offset: usize) -> &'a [u8] {
+	let mut offset = offset;
+	for l in name.split('.') {
+	    out[offset] = (l.len() & 0xff) as u8;
+	    offset += 1;
+	    for c in l.as_bytes().iter() {
+		out[offset] = *c;
+		offset += 1;
+	    }
+	}
+	out[offset] = 0;
+	&out[..offset+1]
+    }
+
     fn to_bytes<'a>(&self, out: &'a mut [u8]) -> &'a [u8]  {
 	match self {
 	    RData::Raw(b) => {
@@ -81,32 +95,16 @@ impl RData {
 		&out[..b.len()]
 	    },
 	    RData::Srv { target, port, priority, weight } => {
-		let mut b : [u8; 80] = [0; 80];
 		out[0] = (priority >> 8) as u8;
 		out[1] = (priority & 0xff) as u8;
 		out[2] = (weight >> 8) as u8;
 		out[3] = (weight & 0xff) as u8;
 		out[4] = (port >> 8) as u8;
 		out[5] = (port & 0xff) as u8;
-
-		let label = ecu_portable::ptr_data(&["eculogical", "local"],  &mut b);
-		for (i, l) in label.iter().enumerate() {
-		    out[6+i] = *l;
-		}
-		&out[..(6 + label.len())]
+		Self::encode_as_label(target, out, 6)
 	    },
 	    RData::Ptr(name) => {
-		let mut offset = 0;
-		for l in name.split('.') {
-		    out[offset] = (l.len() & 0xff) as u8;
-		    offset += 1;
-		    for c in l.as_bytes().iter() {
-			out[offset] = *c;
-			offset += 1;
-		    }
-		}
-		out[offset] = 0;
-		&out[..offset+1]
+		Self::encode_as_label(name, out, 0)
 	    }
 	}
     }