From 151de953b509e7a2a481dc3c5fdb966d011fbc90 Mon Sep 17 00:00:00 2001
From: Callan Bryant <callan.bryant@gmail.com>
Date: Fri, 6 Mar 2020 00:02:31 +0000
Subject: [PATCH] build index of old peer reports

---
 reporttypes.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/reporttypes.go b/reporttypes.go
index aa4c1c8..783f1c2 100644
--- a/reporttypes.go
+++ b/reporttypes.go
@@ -65,11 +65,18 @@ type DsnetReport struct {
 func GenerateReport(dev *wgtypes.Device, conf *DsnetConfig, oldReport *DsnetReport) DsnetReport {
 	wgPeerIndex := make(map[wgtypes.Key]wgtypes.Peer)
 	peerReports := make([]PeerReport, len(conf.Peers))
+	oldPeerReportIndex := make(map[string]PeerReport)
 
 	for _, peer := range dev.Peers {
 		wgPeerIndex[peer.PublicKey] = peer
 	}
 
+	if oldReport != nil {
+		for _, report := range oldReport.Peers {
+			oldPeerReportIndex[report.Hostname] = report
+		}
+	}
+
 	for i, peer := range conf.Peers {
 		wgPeer, known := wgPeerIndex[peer.PublicKey.Key]