From e21401992207b6c07864423e35beb82ab8a30b07 Mon Sep 17 00:00:00 2001
From: dmiller <dmiller@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Tue, 29 Sep 2020 18:17:10 +0000
Subject: [PATCH] Make IOCP the default Nsock engine on Windows. See #2126

---
 CHANGELOG                 | 5 +++++
 nsock/src/nsock_engines.c | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG b/CHANGELOG
index 2619d5ce8..5d5c084a6 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,10 @@
 #Nmap Changelog ($Id$); -*-text-*-
 
+o [GH#2126] Fix the "iocp" Nsock engine for Windows to be able to correctly
+  handle PCAP read events. This engine is now the default for Windows, which
+  should greatly improve performance over the previous default, the "poll"
+  engine. [Daniel Miller]
+
 o [GH#2051] Restrict Nmap's search path for scripts and data files.
   NMAPDATADIR, defined on Unix and Linux as ${prefix}/share/nmap, will not be
   searched on Windows, where it was previously defined as C:\Nmap .
diff --git a/nsock/src/nsock_engines.c b/nsock/src/nsock_engines.c
index feab87e8a..2e29fb39a 100644
--- a/nsock/src/nsock_engines.c
+++ b/nsock/src/nsock_engines.c
@@ -100,8 +100,8 @@ extern struct io_engine engine_select;
 static struct io_engine *available_engines[] = {
   ENGINE_EPOLL
   ENGINE_KQUEUE
-  ENGINE_POLL
   ENGINE_IOCP
+  ENGINE_POLL
   ENGINE_SELECT
   NULL
 };