Extend service discovery information

examples/onoff_light/src/main.rs

@@ -37,6 +37,7 @@ fn main() {
         pid: 0x8002,
         hw_ver: 2,
         sw_ver: 1,
+        device_name: "OnOff Light".to_string(),
     };
     let dev_att = Box::new(dev_att::HardCodedDevAtt::new());
 

matter/src/core.rs

@@ -62,7 +62,12 @@ impl Matter {
         dev_comm: &CommissioningData,
     ) -> Result<Box<Matter>, Error> {
         let mdns = Mdns::get()?;
-        mdns.set_values(dev_det.vid, dev_det.pid, dev_comm.discriminator);
+        mdns.set_values(
+            dev_det.vid,
+            dev_det.pid,
+            dev_comm.discriminator,
+            &dev_det.device_name,
+        );
 
         let fabric_mgr = Arc::new(FabricMgr::new()?);
         let acl_mgr = Arc::new(AclMgr::new()?);

matter/src/data_model/cluster_basic_information.rs

@@ -31,6 +31,8 @@ pub struct BasicInfoConfig {
     pub pid: u16,
     pub hw_ver: u16,
     pub sw_ver: u32,
+    /// Device name; up to 32 characters
+    pub device_name: String,
 }
 
 fn attr_vid_new(vid: u16) -> Result<Attribute, Error> {

matter/src/lib.rs

@@ -51,6 +51,7 @@
 //!     pid: 0xFFF1,
 //!     hw_ver: 2,
 //!     sw_ver: 1,
+//!     device_name: "OnOff Light".to_string(),
 //! };
 //!
 //! /// Get the Matter Object

matter/src/mdns.rs

@@ -1,20 +1,3 @@
-/*
- *
- *    Copyright (c) 2020-2022 Project CHIP Authors
- *
- *    Licensed under the Apache License, Version 2.0 (the "License");
- *    you may not use this file except in compliance with the License.
- *    You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- *    Unless required by applicable law or agreed to in writing, software
- *    distributed under the License is distributed on an "AS IS" BASIS,
- *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *    See the License for the specific language governing permissions and
- *    limitations under the License.
- */
-
 use std::sync::{Arc, Mutex, Once};
 
 use crate::{
@@ -32,19 +15,20 @@ pub struct MdnsInner {
     pid: u16,
     /// Discriminator
     discriminator: u16,
+    /// Device name
+    device_name: String,
 }
 
 pub struct Mdns {
     inner: Mutex<MdnsInner>,
 }
 
-const SHORT_DISCRIMINATOR_MASK: u16 = 0x700;
+const SHORT_DISCRIMINATOR_MASK: u16 = 0xF00;
 const SHORT_DISCRIMINATOR_SHIFT: u16 = 8;
 
 static mut G_MDNS: Option<Arc<Mdns>> = None;
 static INIT: Once = Once::new();
 
-#[derive(Clone, Copy)]
 pub enum ServiceMode {
     Commissioned,
     Commissionable,
@@ -72,16 +56,18 @@ impl Mdns {
     /// Set mDNS service specific values
     /// Values like vid, pid, discriminator etc
     // TODO: More things like device-type etc can be added here
-    pub fn set_values(&self, vid: u16, pid: u16, discriminator: u16) {
+    pub fn set_values(&self, vid: u16, pid: u16, discriminator: u16, device_name: &str) {
         let mut inner = self.inner.lock().unwrap();
         inner.vid = vid;
         inner.pid = pid;
         inner.discriminator = discriminator;
+        inner.device_name = device_name.chars().take(32).collect();
     }
 
     /// Publish a mDNS service
     /// name - is the service name (comma separated subtypes may follow)
     /// mode - the current service mode
+    #[allow(clippy::needless_pass_by_value)]
     pub fn publish_service(&self, name: &str, mode: ServiceMode) -> Result<SysMdnsService, Error> {
         match mode {
             ServiceMode::Commissioned => {
@@ -89,14 +75,43 @@ impl Mdns {
             }
             ServiceMode::Commissionable => {
                 let inner = self.inner.lock().unwrap();
-                let short =
+                let short = compute_short_discriminator(inner.discriminator);
-                    (inner.discriminator & SHORT_DISCRIMINATOR_MASK) >> SHORT_DISCRIMINATOR_SHIFT;
                 let serv_type = format!("_matterc._udp,_S{},_L{}", short, inner.discriminator);
 
                 let str_discriminator = format!("{}", inner.discriminator);
-                let txt_kvs = [["D", &str_discriminator], ["CM", "1"]];
+                let txt_kvs = [
+                    ["D", &str_discriminator],
+                    ["CM", "1"],
+                    ["DN", &inner.device_name],
+                    ["VP", &format!("{}+{}", inner.vid, inner.pid)],
+                    ["SII", "5000"], /* Sleepy Idle Interval */
+                    ["SAI", "300"],  /* Sleepy Active Interval */
+                    ["T", "1"],      /* TCP supported */
+                    ["PH", "33"],    /* Pairing Hint */
+                    ["PI", ""],      /* Pairing Instruction */
+                ];
                 sys_publish_service(name, &serv_type, MATTER_PORT, &txt_kvs)
             }
         }
     }
 }
+
+fn compute_short_discriminator(discriminator: u16) -> u16 {
+    (discriminator & SHORT_DISCRIMINATOR_MASK) >> SHORT_DISCRIMINATOR_SHIFT
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn can_compute_short_discriminator() {
+        let discriminator: u16 = 0b0000_1111_0000_0000;
+        let short = compute_short_discriminator(discriminator);
+        assert_eq!(short, 0b1111);
+
+        let discriminator: u16 = 840;
+        let short = compute_short_discriminator(discriminator);
+        assert_eq!(short, 3);
+    }
+}

matter/tests/common/im_engine.rs

@@ -93,7 +93,9 @@ impl ImEngine {
             pid: 11,
             hw_ver: 12,
             sw_ver: 13,
+            device_name: "Test Device".to_string(),
         };
+
         let dev_att = Box::new(DummyDevAtt {});
         let fabric_mgr = Arc::new(FabricMgr::new().unwrap());
         let acl_mgr = Arc::new(AclMgr::new_with(false).unwrap());