TCP meets mobile code

摘要: This paper argues that transport protocols such as TCP provide a rare domain in which protocol extensibility by untrusted parties is both valuable and practical. continues to be refined despite more than two decades of progress, the difficulties due deployment delays backwards-compatibility are well-known. Remote extensibility, host can ship code dynamically load it on another node network per-connection basis, directly tackles these problems. At same time, unicast much narrower other domains use mobile code, active networking, helps make feasible. The level provides well understood notion global safety--TCP friendliness--while local safety guaranteed isolation per-protocol state recent safe-language technologies. We support arguments outlining design XTCP, our extensible framework.