Expose api on Stack and add doc

Make it work with smoltcp 0.9

embassy-net/src/dns.rs

@@ -1,6 +1,6 @@
 //! DNS socket with async support.
 use heapless::Vec;
-pub use smoltcp::socket::dns::{DnsQuery, Socket, MAX_ADDRESS_COUNT};
+pub use smoltcp::socket::dns::{DnsQuery, Socket};
 pub(crate) use smoltcp::socket::dns::{GetQueryResultError, StartQueryError};
 pub use smoltcp::wire::{DnsQueryType, IpAddress};
 
@@ -48,9 +48,7 @@ impl<'a, D> DnsSocket<'a, D>
 where
     D: Driver + 'static,
 {
-    /// Create a new DNS socket using the provided stack and query storage.
+    /// Create a new DNS socket using the provided stack.
-    ///
-    /// DNS servers are derived from the stack configuration.
     ///
     /// NOTE: If using DHCP, make sure it has reconfigured the stack to ensure the DNS servers are updated.
     pub fn new(stack: &'a Stack<D>) -> Self {
@@ -58,7 +56,7 @@ where
     }
 
     /// Make a query for a given name and return the corresponding IP addresses.
-    pub async fn query(&self, name: &str, qtype: DnsQueryType) -> Result<Vec<IpAddress, MAX_ADDRESS_COUNT>, Error> {
+    pub async fn query(&self, name: &str, qtype: DnsQueryType) -> Result<Vec<IpAddress, 1>, Error> {
         self.stack.dns_query(name, qtype).await
     }
 }

embassy-net/src/lib.rs

@@ -231,12 +231,9 @@ impl<D: Driver + 'static> Stack<D> {
         unreachable!()
     }
 
+    /// Make a query for a given name and return the corresponding IP addresses.
     #[cfg(feature = "dns")]
-    async fn dns_query(
+    pub async fn dns_query(&self, name: &str, qtype: dns::DnsQueryType) -> Result<Vec<IpAddress, 1>, dns::Error> {
-        &self,
-        name: &str,
-        qtype: dns::DnsQueryType,
-    ) -> Result<Vec<IpAddress, { dns::MAX_ADDRESS_COUNT }>, dns::Error> {
         let query = self.with_mut(|s, i| {
             if let Some(dns_handle) = i.dns_socket {
                 let socket = s.sockets.get_mut::<dns::Socket>(dns_handle);