To allocate an Internet protocol control block, in_pcballoc() is called.

要分配Internet协议控制块，可调用 in_pcballoc()。

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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。

youdao

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。

youdao