Change DNS trait to return nb, and bump dependencies

Author: MathiasKoch

CHANGELOG.md

@@ -7,7 +7,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## Unreleased
 
-* None
+- Changed [`Dns`](./src/dns.rs) methods to return `nb::Result<..>` to allow non-blocking implementations.
+- Bump dependency version of `heapless` to `v0.6.1` to address security issue of sub-dependency.
+- Bump dependency version of `no-std-net` to `v0.5`.
+
 
 ## [0.3.0] - 2021-02-15
 

Cargo.toml

@@ -19,5 +19,5 @@ categories = ["embedded", "hardware-support", "no-std", "network-programming"]
 
 [dependencies]
 nb = "1"
-no-std-net = "0.4"
-heapless = "^0.5"
+no-std-net = "0.5"
+heapless = "^0.6.1"

src/dns.rs

@@ -31,13 +31,17 @@ pub trait Dns {
 
 	/// Resolve the first ip address of a host, given its hostname and a desired
 	/// address record type to look for
-	fn get_host_by_name(&self, hostname: &str, addr_type: AddrType) -> Result<IpAddr, Self::Error>;
+	fn get_host_by_name(
+		&self,
+		hostname: &str,
+		addr_type: AddrType,
+	) -> nb::Result<IpAddr, Self::Error>;
 
 	/// Resolve the hostname of a host, given its ip address
 	///
 	/// **Note**: A fully qualified domain name (FQDN), has a maximum length of
 	/// 255 bytes [`rfc1035`]
 	///
 	/// [`rfc1035`]: https://tools.ietf.org/html/rfc1035
-	fn get_host_by_address(&self, addr: IpAddr) -> Result<String<consts::U256>, Self::Error>;
+	fn get_host_by_address(&self, addr: IpAddr) -> nb::Result<String<consts::U256>, Self::Error>;
 }