论文标题
采用多径TCP的纵向观点
A Longitudinal View at the Adoption of Multipath TCP
论文作者
论文摘要
Multipath TCP（MPTCP）扩展了传统的TCP，以同时在源和目的地同时使用多个连接端点。自2013年标准化以来，MPTCP一直在积极发展，最近在2020年2月，MPTCP上游到Linux内核上。在本文中，我们在Internet中对MPTCPV0的深入分析以及迄今为止对MPTCPV1的首次分析。我们探测了整个IPv4地址空间和IPv6命中列表，以检测启用MPTCP的系统在端口80和443上运行。我们的扫描显示，稳定增加了具有MPTCPV0的IPS，在IPV4上达到13k+（2 $ \ tim $ $ $ \ tim $ $ $ \ tim tim tim tim times in in IPV6）（40 $ $ \ times $ \ times $ \ timp $ \ times $ \ times $ \ timp $ \）。 MPTCPV1部署相对较低，$ \ $ \ $ \ $ \ $ 100的IPv4和IPv6中的支持主机，其中大多数属于Apple。我们还发现了大量看似具有MPTCP功能的主机，这是一种镜像TCP选项的中间框。我们针对选定的主机进行有针对性的HTTP测量值，并发现Middlebox可以积极影响使用MPTCP的应用程序的质量。最后，我们分析了从Caida和Mawi的两个互补交通轨迹，并阐明了MPTCP的现实使用情况。我们发现，尽管MPTCP的使用率在过去几年中增加了20倍，但其流量份额仍然很低。
Multipath TCP (MPTCP) extends traditional TCP to enable simultaneous use of multiple connection endpoints at the source and destination. MPTCP has been under active development since its standardization in 2013, and more recently in February 2020, MPTCP was upstreamed to the Linux kernel. In this paper, we provide an in-depth analysis of MPTCPv0 in the Internet and the first analysis of MPTCPv1 to date. We probe the entire IPv4 address space and an IPv6 hitlist to detect MPTCP-enabled systems operational on port 80 and 443. Our scans reveal a steady increase in MPTCPv0-capable IPs, reaching 13k+ on IPv4 (2$\times$ increase in one year) and 1k on IPv6 (40$\times$ increase). MPTCPv1 deployment is comparatively low with $\approx$100 supporting hosts in IPv4 and IPv6, most of which belong to Apple. We also discover a substantial share of seemingly MPTCP-capable hosts, an artifact of middleboxes mirroring TCP options. We conduct targeted HTTP(S) measurements towards select hosts and find that middleboxes can aggressively impact the perceived quality of applications utilizing MPTCP. Finally, we analyze two complementary traffic traces from CAIDA and MAWI to shed light on the real-world usage of MPTCP. We find that while MPTCP usage has increased by a factor of 20 over the past few years, its traffic share is still quite low.
