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Adjust the ephemeral port

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This commit is contained in:
Ruihan Li
2024-09-24 13:30:47 +08:00
committed by Tate, Hongliang Tian
parent eb3a033496
commit 3fc396f5f1
1 changed files with 8 additions and 4 deletions
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12
kernel/libs/aster-bigtcp/src/iface/common.rs
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@ -67,7 +67,11 @@ impl<E> IfaceCommon<E> {
self.interface.lock().ipv4_addr() self.interface.lock().ipv4_addr()
} }
/// Alloc an unused port range from 49152 ~ 65535 (According to smoltcp docs) /// Allocates an unused ephemeral port.
///
/// We follow the port range that many Linux kernels use by default, which is 32768-60999.
///
/// See <https://en.wikipedia.org/wiki/Ephemeral_port>.
fn alloc_ephemeral_port(&self) -> Option<u16> { fn alloc_ephemeral_port(&self) -> Option<u16> {
let mut used_ports = self.used_ports.lock(); let mut used_ports = self.used_ports.lock();
for port in IP_LOCAL_PORT_START..=IP_LOCAL_PORT_END { for port in IP_LOCAL_PORT_START..=IP_LOCAL_PORT_END {
@ -95,7 +99,7 @@ impl<E> IfaceCommon<E> {
true true
} }
/// Release port number so the port can be used again. For reused port, the port may still be in use. /// Releases the port so that it can be used again (if it is not being reused).
pub(crate) fn release_port(&self, port: u16) { pub(crate) fn release_port(&self, port: u16) {
let mut used_ports = self.used_ports.lock(); let mut used_ports = self.used_ports.lock();
if let Some(used_times) = used_ports.remove(&port) { if let Some(used_times) = used_ports.remove(&port) {
@ -246,5 +250,5 @@ impl<E> IfaceCommon<E> {
} }
} }
const IP_LOCAL_PORT_START: u16 = 49152; const IP_LOCAL_PORT_START: u16 = 32768;
const IP_LOCAL_PORT_END: u16 = 65535; const IP_LOCAL_PORT_END: u16 = 60999;