Refactor sockets

Split socket into different modules for handling tcp and udp connections. This reduces complexety of the socket module.

rust/src/nasl/builtin/network/mod.rs

@@ -12,6 +12,9 @@ use crate::storage::{Field, Retrieve};
 pub mod network;
 pub mod network_utils;
 pub mod socket;
+pub mod tcp;
+pub mod tls;
+pub mod udp;
 
 // 512 Bytes are typically supported by network devices. The ip header maximum size is 60 and a UDP
 // header contains 8 bytes, which must be subtracted from the max size for UDP packages.

rust/src/nasl/builtin/network/network_utils.rs

@@ -4,6 +4,7 @@
 
 //! This module provides utility functions for IP handling.
 use std::{
+    io,
     net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr, UdpSocket},
     ptr,
     str::FromStr,
@@ -35,14 +36,10 @@ pub fn convert_timeout(timeout: Option<i64>) -> Option<Duration> {
 }
 
 /// Bind a local UDP socket to a V4 or V6 address depending on the given destination address
-pub fn bind_local_socket(dst: &SocketAddr) -> Result<UdpSocket, FunctionErrorKind> {
-    let fe = Err(FunctionErrorKind::Diagnostic(
-        "Error binding".to_string(),
-        None,
-    ));
+pub fn bind_local_socket(dst: &SocketAddr) -> io::Result<UdpSocket> {
     match dst {
-        SocketAddr::V4(_) => UdpSocket::bind("0.0.0.0:0").or(fe),
-        SocketAddr::V6(_) => UdpSocket::bind("[::]:0").or(fe),
+        SocketAddr::V4(_) => UdpSocket::bind("0.0.0.0:0"),
+        SocketAddr::V6(_) => UdpSocket::bind("[::]:0"),
     }
 }