Fix build when with no socket features

.github/workflows/test.yml

@@ -22,6 +22,9 @@ jobs:
           # Test default features.
           - default
 
+          # Test minimal featureset
+          - std proto-ipv4
+
           # Test features chosen to be as orthogonal as possible.
           - std ethernet phy-raw_socket proto-ipv6 socket-udp
           - std ethernet phy-tap_interface proto-ipv6 socket-udp

Cargo.toml

@@ -39,10 +39,11 @@ ethernet = []
 "proto-igmp" = ["proto-ipv4"]
 "proto-dhcpv4" = ["proto-ipv4", "socket-raw"]
 "proto-ipv6" = []
-"socket-raw" = []
-"socket-udp" = []
-"socket-tcp" = []
-"socket-icmp" = []
+"socket" = []
+"socket-raw" = ["socket"]
+"socket-udp" = ["socket"]
+"socket-tcp" = ["socket"]
+"socket-icmp" = ["socket"]
 "async" = []
 default = [
   "std", "log", # needed for `cargo test --no-default-features --features default` :/

src/lib.rs

@@ -106,6 +106,7 @@ pub mod storage;
 pub mod phy;
 pub mod wire;
 pub mod iface;
+#[cfg(feature = "socket")]
 pub mod socket;
 pub mod time;
 #[cfg(feature = "proto-dhcpv4")]