fix bind to device on linux

Sources/LCLPing/HTTP/NIOHTTPClient.swift

@@ -215,7 +215,7 @@ final class NIOHTTPClient: Pingable {
                         ()
                     }
                     #elseif canImport(Glibc)
-                    return channel.setOption(.socketOption(.so_bindtodevice), value: device.interfaceIndex)
+                    return (channel as! SocketOptionProvider).setBindToDevice(device.name)
                     #endif
                 }
 

Sources/LCLPing/ICMP/ICMPPingClient.swift

@@ -191,7 +191,7 @@ public final class ICMPPingClient: Pingable {
                         ()
                     }
                     #elseif canImport(Glibc)
-                    return channel.setOption(.socketOption(.so_bindtodevice), value: device.interfaceIndex)
+                    return (channel as! SocketOptionProvider).setBindToDevice(device.name)
                     #endif
                 }
 

Sources/LCLPing/Utilities/LCLPing+SocketOption.swift

@@ -21,3 +21,17 @@ extension NIOBSDSocket.Option {
     public static let so_bindtodevice = Self(rawValue: SO_BINDTODEVICE)
     #endif
 }
+
+extension SocketOptionProvider {
+    #if canImport(Glibc)
+    /// Sets the socket option SO_BINDTODEVICE to `value`.
+    ///
+    /// - parameters:
+    ///     - value: The value to set SO_BINDTODEVICE to.
+    /// - returns: An `EventLoopFuture` that fires when the option has been set,
+    ///     or if an error has occurred.
+    public func setBindToDevice(_ value: String) -> EventLoopFuture<Void> {
+        self.unsafeSetSocketOption(level: .socket, name: .so_bindtodevice, value: value)
+    }
+    #endif
+}