Fix quic client on TestValidator, alternative (backport #27046) (#27053)

Fix quic client on TestValidator, alternative (#27046)

Add new method to enable custom offset

(cherry picked from commit 45c0da8)

Co-authored-by: Tyera Eulberg <tyera@solana.com>

gossip/src/cluster_info.rs

@@ -48,7 +48,7 @@ use {
     solana_ledger::shred::Shred,
     solana_measure::measure::Measure,
     solana_net_utils::{
-        bind_common, bind_common_in_range, bind_in_range, bind_two_consecutive_in_range,
+        bind_common, bind_common_in_range, bind_in_range, bind_two_in_range_with_offset,
         find_available_port_in_range, multi_bind_in_range, PortRange,
     },
     solana_perf::{
@@ -2740,20 +2740,21 @@ impl Node {
     }
     pub fn new_localhost_with_pubkey(pubkey: &Pubkey) -> Self {
         let bind_ip_addr = IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0));
+        let port_range = (1024, 65535);
         let ((_tpu_port, tpu), (_tpu_quic_port, tpu_quic)) =
-            bind_two_consecutive_in_range(bind_ip_addr, (1024, 65535)).unwrap();
+            bind_two_in_range_with_offset(bind_ip_addr, port_range, QUIC_PORT_OFFSET).unwrap();
         let (gossip_port, (gossip, ip_echo)) =
-            bind_common_in_range(bind_ip_addr, (1024, 65535)).unwrap();
+            bind_common_in_range(bind_ip_addr, port_range).unwrap();
         let gossip_addr = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), gossip_port);
         let tvu = UdpSocket::bind("127.0.0.1:0").unwrap();
         let tvu_forwards = UdpSocket::bind("127.0.0.1:0").unwrap();
         let ((_tpu_forwards_port, tpu_forwards), (_tpu_forwards_quic_port, tpu_forwards_quic)) =
-            bind_two_consecutive_in_range(bind_ip_addr, (1024, 65535)).unwrap();
+            bind_two_in_range_with_offset(bind_ip_addr, port_range, QUIC_PORT_OFFSET).unwrap();
         let tpu_vote = UdpSocket::bind("127.0.0.1:0").unwrap();
         let repair = UdpSocket::bind("127.0.0.1:0").unwrap();
-        let rpc_port = find_available_port_in_range(bind_ip_addr, (1024, 65535)).unwrap();
+        let rpc_port = find_available_port_in_range(bind_ip_addr, port_range).unwrap();
         let rpc_addr = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), rpc_port);
-        let rpc_pubsub_port = find_available_port_in_range(bind_ip_addr, (1024, 65535)).unwrap();
+        let rpc_pubsub_port = find_available_port_in_range(bind_ip_addr, port_range).unwrap();
         let rpc_pubsub_addr =
             SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), rpc_pubsub_port);
 
@@ -2829,9 +2830,9 @@ impl Node {
         let (tvu_port, tvu) = Self::bind(bind_ip_addr, port_range);
         let (tvu_forwards_port, tvu_forwards) = Self::bind(bind_ip_addr, port_range);
         let ((tpu_port, tpu), (_tpu_quic_port, tpu_quic)) =
-            bind_two_consecutive_in_range(bind_ip_addr, port_range).unwrap();
+            bind_two_in_range_with_offset(bind_ip_addr, port_range, QUIC_PORT_OFFSET).unwrap();
         let ((tpu_forwards_port, tpu_forwards), (_tpu_forwards_quic_port, tpu_forwards_quic)) =
-            bind_two_consecutive_in_range(bind_ip_addr, port_range).unwrap();
+            bind_two_in_range_with_offset(bind_ip_addr, port_range, QUIC_PORT_OFFSET).unwrap();
         let (tpu_vote_port, tpu_vote) = Self::bind(bind_ip_addr, port_range);
         let (_, retransmit_socket) = Self::bind(bind_ip_addr, port_range);
         let (repair_port, repair) = Self::bind(bind_ip_addr, port_range);

net-utils/src/lib.rs

@@ -519,31 +519,34 @@ pub fn bind_common(
         .and_then(|_| TcpListener::bind(&addr).map(|listener| (sock.into(), listener)))
 }
 
-pub fn bind_two_consecutive_in_range(
+pub fn bind_two_in_range_with_offset(
     ip_addr: IpAddr,
     range: PortRange,
+    offset: u16,
 ) -> io::Result<((u16, UdpSocket), (u16, UdpSocket))> {
-    let mut first: Option<UdpSocket> = None;
+    if range.1.saturating_sub(range.0) < offset {
+        return Err(io::Error::new(
+            io::ErrorKind::Other,
+            "range too small to find two ports with the correct offset".to_string(),
+        ));
+    }
     for port in range.0..range.1 {
-        if let Ok(bind) = bind_to(ip_addr, port, false) {
-            match first {
-                Some(first_bind) => {
+        if let Ok(first_bind) = bind_to(ip_addr, port, false) {
+            if range.1.saturating_sub(port) >= offset {
+                if let Ok(second_bind) = bind_to(ip_addr, port + offset, false) {
                     return Ok((
                         (first_bind.local_addr().unwrap().port(), first_bind),
-                        (bind.local_addr().unwrap().port(), bind),
+                        (second_bind.local_addr().unwrap().port(), second_bind),
                     ));
                 }
-                None => {
-                    first = Some(bind);
-                }
+            } else {
+                break;
             }
-        } else {
-            first = None;
         }
     }
     Err(io::Error::new(
         io::ErrorKind::Other,
-        "couldn't find two consecutive ports in range".to_string(),
+        "couldn't find two ports with the correct offset in range".to_string(),
     ))
 }
 
@@ -818,12 +821,21 @@ mod tests {
     }
 
     #[test]
-    fn test_bind_two_consecutive_in_range() {
+    fn test_bind_two_in_range_with_offset() {
         solana_logger::setup();
         let ip_addr = IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0));
-        if let Ok(((port1, _), (port2, _))) = bind_two_consecutive_in_range(ip_addr, (1024, 65535))
+        let offset = 6;
+        if let Ok(((port1, _), (port2, _))) =
+            bind_two_in_range_with_offset(ip_addr, (1024, 65535), offset)
+        {
+            assert!(port2 == port1 + offset);
+        }
+        let offset = 42;
+        if let Ok(((port1, _), (port2, _))) =
+            bind_two_in_range_with_offset(ip_addr, (1024, 65535), offset)
         {
-            assert!(port2 == port1 + 1);
+            assert!(port2 == port1 + offset);
         }
+        assert!(bind_two_in_range_with_offset(ip_addr, (1024, 1044), offset).is_err());
     }
 }