是否可以通过 TCP 发送数据报? [英] Is it possible to send datagrams over TCP?

问题描述

理论上没有什么可以阻止使用带有 SOCK_DGRAM 的 TCP 套接字.您将获得可靠的数据报传输.这可以使用 Berkeley 套接字吗?

解决方案

你想看的是SCTP 协议.它提供了通过可靠的 TCP 样式连接发送数据报的能力:

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与 TCP 相比，SCTP 可能是以记录为导向，这意味着它以以下方式传输数据消息，以类似的方式用户数据报协议 (UDP)，以便在一个发送的一组字节(消息)传输操作(记录)是完全按照那个小组的意思阅读接收器应用程序.TCP是面向流，传输流字节，它正确地重新排序在无序交货的情况下.它然而，不尊重消息边界，即结构原始数据发送方的传输单元.

看看 SCTP 一对一风格的连接，这可能是您正在寻找的.

大多数 Unix/Linux 操作系统都有实现，Windows 有第三方实现.有关详细信息，请参阅我链接的 Wiki 文章的末尾.

In theory nothing prevents using TCP socket with SOCK_DGRAM. What you'll get is reliable datagram transport. Is this possible using Berkeley sockets?

解决方案

What you want to take a look at is the SCTP Protocol. It provides the ability to send Datagrams over a reliable TCP style connection:

In contrast to TCP, SCTP may be characterized as record-oriented, meaning it transports data in terms of messages, in a similar fashion to the User Datagram Protocol (UDP), so that a group of bytes (message) sent in one transmission operation (record) is read exactly as that group at the receiver application. TCP is stream-oriented, transporting streams of bytes, which it correctly reorders in case of out-of-order delivery. It does not, however, honor message boundaries, i.e., the structure of data in terms of their original transmission units at the sender.

Take a look at SCTP one to one style connections which are probably what you're looking for.

There are implementations for most Unix / Linux OS and there is a third party implementation for Windows. See the end of the Wiki article I linked for details.

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