Random port (#258)

* Add random ports and remove whitespaces

add indv random ports

* update

* update

* add asserts

* add comments

* update random_port

Author: rupeshkoushik07

Cargo.toml

@@ -23,6 +23,7 @@ libc = "0.2"
 ringbuf = "0.2.6"
 dashmap = { version = "5.1", features=["serde"] }
 parking_lot = "0.12"
+rand = "0.8.4"
 
 [dev-dependencies]
 criterion = { version = "0.3", features = ["html_reports"]}

src/tests/mod.rs

@@ -3,6 +3,8 @@
 mod fs_tests;
 mod ipc_tests;
 mod networking_tests;
+use rand::Rng;
+use std::net::{TcpListener, UdpSocket};
 
 use crate::interface;
 use crate::safeposix::{cage::*, filesystem::*};
@@ -90,3 +92,19 @@ pub fn sizecbuf<'a>(size: usize) -> Box<[u8]> {
 pub fn cbuf2str(buf: &[u8]) -> &str {
     std::str::from_utf8(buf).unwrap()
 }
+
+// The RustPOSIX test suite avoids conflicts caused by repeatedly binding to the same ports by generating a random port number within the valid range (49152-65535) for each test run. This eliminates the need for waiting between tests.
+
+fn is_port_available(port: u16) -> bool {
+    TcpListener::bind(("127.0.0.1", port)).is_ok() &&
+    UdpSocket::bind(("127.0.0.1", port)).is_ok()
+}
+
+pub fn generate_random_port() -> u16 {
+    for port in 49152..65535 {
+        if is_port_available(port) {
+            return port;
+        }
+    }
+    panic!("No available ports found");
+}