From e0ac611a08adb5906b853dcc9d6c689f9f6427c9 Mon Sep 17 00:00:00 2001
From: Gunnar Beutner <gbeutner@serenityos.org>
Date: Fri, 30 Apr 2021 22:08:40 +0200
Subject: Kernel: Tear down connections when we receive an RST packet

---
 Kernel/Net/NetworkTask.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'Kernel/Net/NetworkTask.cpp')

diff --git a/Kernel/Net/NetworkTask.cpp b/Kernel/Net/NetworkTask.cpp
index 92dd3aca6b..cf8f617e7e 100644
--- a/Kernel/Net/NetworkTask.cpp
+++ b/Kernel/Net/NetworkTask.cpp
@@ -528,6 +528,11 @@ void handle_tcp(const IPv4Packet& ipv4_packet, const Time& packet_timestamp)
             return;
         }
     case TCPSocket::State::Established:
+        if (tcp_packet.has_rst()) {
+            socket->set_state(TCPSocket::State::Closed);
+            return;
+        }
+
         if (tcp_packet.has_fin()) {
             if (payload_size != 0)
                 socket->did_receive(ipv4_packet.source(), tcp_packet.source_port(), KBuffer::copy(&ipv4_packet, sizeof(IPv4Packet) + ipv4_packet.payload_size()), packet_timestamp);
-- 
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