From 31894147884af3e7151b4d653e5268a0b0477db8 Mon Sep 17 00:00:00 2001
From: Jason Ish <jason.ish@oisf.net>
Date: Tue, 26 Apr 2022 13:25:40 -0600
Subject: [PATCH] dns: convert transaction list to vecdeque

Allows for more efficient removal from front of the list.

Ticket: #5277
---
 rust/src/dns/dns.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/rust/src/dns/dns.rs b/rust/src/dns/dns.rs
index 4f5cfa8539..fe00d04faa 100644
--- a/rust/src/dns/dns.rs
+++ b/rust/src/dns/dns.rs
@@ -311,7 +311,7 @@ pub struct DNSState {
     pub tx_id: u64,
 
     // Transactions.
-    pub transactions: Vec<DNSTransaction>,
+    pub transactions: VecDeque<DNSTransaction>,
 
     pub events: u16,
 
@@ -401,7 +401,7 @@ impl DNSState {
 
                 let mut tx = self.new_tx();
                 tx.request = Some(request);
-                self.transactions.push(tx);
+                self.transactions.push_back(tx);
 
                 if z_flag {
                     SCLogDebug!("Z-flag set on DNS response");
@@ -445,7 +445,7 @@ impl DNSState {
                     }
                 }
                 tx.response = Some(response);
-                self.transactions.push(tx);
+                self.transactions.push_back(tx);
 
                 if z_flag {
                     SCLogDebug!("Z-flag set on DNS response");