implement random workload generator

ubw-sward/src/udp/generator.rs

@@ -0,0 +1,21 @@
+use rand::RngCore;
+
+pub struct RandomUdpWorkloadGenerator<Rng: RngCore> {
+    rng: Rng,
+}
+
+impl<Rng: RngCore> RandomUdpWorkloadGenerator<Rng> {
+    pub fn new(rng: Rng) -> Self {
+        Self { rng }
+    }
+    pub fn generate_sized<const SIZE: usize>(&mut self) -> [u8; SIZE] {
+        let mut buf = [0u8; SIZE];
+        self.rng.fill_bytes(&mut buf);
+        buf
+    }
+    pub fn generate_boxed(&mut self, size: usize) -> Box<[u8]> {
+        let mut buf = vec![0u8; size].into_boxed_slice();
+        self.rng.fill_bytes(&mut buf);
+        buf
+    }
+}

ubw-sward/src/udp/mod.rs

@@ -1 +1,2 @@
 pub mod random_flood;
+pub mod generator;