In the above command a value of 0 is specified, which sets the number of requests allowed down a single socket to unlimited.
上面的命令中指定了值0，将允许通过单个套接字发送的请求数量设置为无限大。
tcp_usrreq () now calls soisconnecting (), which sets the state of the socket on the client host as SYN_SENT.
tcp_usrreq ()现在调用soisconnecting ()，它可以将客户端主机上的套接字的状态设置为 SYN_SENT。
Lists allow the same socket to appear more than once in each list, but doing so doesn't make sense: conceptually, what is passed are sets of sockets.
列表中可以允许同一个socket多次出现，但是这样做一点意义都没有：从概念上讲，传入的应该是由socket组成的set。
Sets or clears the SO_BROADCAST socket option. When this option is set, UDP packets may be sent to a local interface's broadcast address.
设置或者清除套接字的SO_BROADCAST(广播)选项。当该设置生效时，UDP数据包将被发送至本地网络接口的广播地址。
Sets the IP_TTL socket option. TTL stands for "Time to Live," but in this context it specifies the number of IP hops that a packet is allowed to go through.
设置套接字的IP _TTL选项，TTL表示“存活时间”，但是在这个上下文环境中，特指一个数据包允许经过的IP跳数。
Sets the server socket implementation factory for the application.
设置应用程序的服务器套接字实现工厂。
Sets the server socket implementation factory for the application.
设置应用程序的服务器套接字实现工厂。
应用推荐