From 53fbe7343e7795507891345d2bf531b11067ccb3 Mon Sep 17 00:00:00 2001
From: Alexander Babikov <lemondrops358@gmail.com>
Date: Wed, 20 Mar 2024 22:30:11 +0500
Subject: [PATCH] Check for pcap DLL in Npcap's installation directory on
 Windows

---
 src/network/net_pcap.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/network/net_pcap.c b/src/network/net_pcap.c
index e1747580b..16caaec7e 100644
--- a/src/network/net_pcap.c
+++ b/src/network/net_pcap.c
@@ -365,7 +365,13 @@ net_pcap_prepare(netdev_t *list)
 
     /* Try loading the DLL. */
 #ifdef _WIN32
+    /* Add the Npcap directory to the DLL search path. */
+    char npcap_dir[512];
+    GetSystemDirectoryA(npcap_dir, 480);
+    strcat(npcap_dir, "\\Npcap");
+    SetDllDirectoryA(npcap_dir);
     libpcap_handle = dynld_module("wpcap.dll", pcap_imports);
+    SetDllDirectoryA(NULL); /* reset the DLL search path */
 #elif defined __APPLE__
     libpcap_handle = dynld_module("libpcap.dylib", pcap_imports);
 #else