From f6b0e9152b88d041dc1b84c379fe26b9ffc59ef4 Mon Sep 17 00:00:00 2001
From: gh0st <1264131+gh0st42@users.noreply.github.com>
Date: Wed, 22 Nov 2023 16:15:38 +0100
Subject: [PATCH] fix #51: strings from rnd_node_name now always start with a
 letter to pass is_valid_node_name test

---
 core/dtn7/src/dtnconfig.rs | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/core/dtn7/src/dtnconfig.rs b/core/dtn7/src/dtnconfig.rs
index 0939d935..76e527e4 100644
--- a/core/dtn7/src/dtnconfig.rs
+++ b/core/dtn7/src/dtnconfig.rs
@@ -45,11 +45,20 @@ pub struct DtnConfig {
 }
 
 pub fn rnd_node_name() -> String {
-    thread_rng()
-        .sample_iter(&Alphanumeric)
-        .take(10)
-        .map(char::from)
-        .collect()
+    // generate a random node name starting with a character
+    let mut rng = thread_rng();
+    let mut result_str = String::new();
+
+    // Get a random letter
+    let first_char = rng.gen_range(b'a'..=b'z') as char;
+    result_str.push(first_char);
+
+    // Get 9 more random characters
+    for _ in 0..9 {
+        let next_char = thread_rng().sample_iter(&Alphanumeric).next().unwrap() as char;
+        result_str.push(next_char);
+    }
+    result_str
 }
 
 impl From<PathBuf> for DtnConfig {