The switch in the tcp_usrreq function calls in_setpeeraddr(), which copies the foreign IP address and foreign port number from the protocol control block and returns these to the server process.
tcp_usrreq 函数中的切换调用 in_setpeeraddr()，后者从协议控制块复制外来 IP 地址和外来端口号，并将其返回到服务器进程。
2
Circuit control with microcomputer chip: The circuit has the function of address correction, which makes it more stable;
电路微电脑芯片控制，电路自带住处纠错功能，使电路更稳定；
3
Elegant and stylish appearance, graceful and clear acoustic quality, with the remote controlfunction, you can use the remote control to set the sound box frequency, address code and volume.