对于基于网络的嵌入式设备提供的服务如何用一种简单的协议实现查找和配置有着广泛的用途.这是因为这些设备大都属于被动设备,所以主机在不知道它们IP地址的情况下很难和它们进行通信.SSDCP(Simple Service Discovery and Configuration Protocol)就是这样一种可以让主机通过UDP广播的方式来发现和配置这些设备,它提供了一种在主机和目标机在双方都不知道对方IP的情况下进行数据通信的方法,这种通信对处于两个不同子网的设备也同样适用.SSDCP协议建立在网络通信的应用层,过程类似DHCP协议,但不同的是它允许服务端相对于客户端后启动.该协议结构简单代码紧凑非常适用于嵌入式设备.%A Simple Service Discovery and Configuration Protocol (SSDCP) is useful for IP - based embedded devices, because they are passive devices, it is difficult to communicate with them for a host not knowing their IP. SSDCP proposes a simple protocol of how to discover and configure these devices based on UDP broadcasting, and makes it possible to communicate between host computer and target devices who do not know peer's IP,even they are belong to different subnets. SSDCP is an application layer protocol. Its procedure is something like DHCP, but it allows a post started server to scan and reconfigure clients. Based on SSDCP, some higher level protocol can be realized, such as Local DNS. Its simple structure and code tight are appropriate to embedded devices.
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