From 38f458db7c0e5a193001803bfe54efde2c9efa90 Mon Sep 17 00:00:00 2001
From: grossmj <grossmj@gns3.net>
Date: Thu, 8 Mar 2018 16:00:05 +0700
Subject: [PATCH] Delete old pcap file when starting a new packet capture.

---
 gns3server/controller/link.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/gns3server/controller/link.py b/gns3server/controller/link.py
index edc01cec..fc3febb4 100644
--- a/gns3server/controller/link.py
+++ b/gns3server/controller/link.py
@@ -305,6 +305,12 @@ class Link:
         Dump a pcap file on disk
         """
 
+        if os.path.exists(self.capture_file_path):
+            try:
+                os.remove(self.capture_file_path)
+            except OSError as e:
+                raise aiohttp.web.HTTPConflict(text="Could not delete old capture file '{}': {}".format(self.capture_file_path, e))
+
         try:
             stream_content = yield from self.read_pcap_from_source()
         except aiohttp.web.HTTPException as e: