From a0211d88e75505150a4ed51d4585e6dd7f993fbd Mon Sep 17 00:00:00 2001 From: Bananymous Date: Sun, 8 Feb 2026 19:44:30 +0200 Subject: [PATCH] Kernel: Don't include TCP header in MSS --- kernel/kernel/Networking/TCPSocket.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/kernel/Networking/TCPSocket.cpp b/kernel/kernel/Networking/TCPSocket.cpp index 2f3b0d24..70b228b9 100644 --- a/kernel/kernel/Networking/TCPSocket.cpp +++ b/kernel/kernel/Networking/TCPSocket.cpp @@ -463,7 +463,7 @@ namespace Kernel }; auto interface = MUST(this->interface(reinterpret_cast(&target), sizeof(target))); - add_tcp_header_option<0, TCPOption::MaximumSeqmentSize>(header, interface->payload_mtu() - m_network_layer.header_size()); + add_tcp_header_option<0, TCPOption::MaximumSeqmentSize>(header, interface->payload_mtu() - m_network_layer.header_size() - protocol_header_size()); if (m_connection_info->has_window_scale) add_tcp_header_option<4, TCPOption::WindowScale>(header, m_recv_window.scale_shift);