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as Tor does, skip to random initial stream member.

This commit is contained in:
Nick Mathewson 2020-09-23 19:50:15 -04:00
parent c35477bb3d
commit 9e8350aea0
1 changed files with 6 additions and 1 deletions
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7
tor-proto/src/circuit/streammap.rs
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@ -8,6 +8,8 @@ use crate::Result;
use futures::channel::mpsc;
use std::collections::HashMap;
use rand::Rng;
/// The entry for a stream.
pub(super) enum StreamEnt {
/// An open stream: any relay cells tagged for this stream should get
@ -25,7 +27,10 @@ pub(super) struct StreamMap {
impl StreamMap {
/// Make a new empty StreamMap.
pub(super) fn new() -> Self {
let iter = (1_u16..=65535_u16).cycle();
let mut iter = (1_u16..=65535_u16).cycle();
let mut rng = rand::thread_rng();
let skip: u16 = rng.gen(); // is this really O(1)? check. XXXX
let _ = iter.nth(skip as usize);
StreamMap {
m: HashMap::new(),
i: iter,