这里可以找到大部分处理逻辑,net/ipv4/Tcp_timer.c: staticvoidtcp_keepalive_timer(unsignedlongdata){structsock *sk = (structsock *) data;structinet_connection_sock *icsk = inet_csk(sk);structtcp_sock *tp = tcp_sk(sk); __u32 elapsed;/* Only process if socket is not in use. */bh_l...
/* If keepalive was lost due to local congestion, * try harder. */ elapsed = TCP_RESOURCE_PROBE_INTERVAL; } } else { /* It is tp->rcv_tstamp + keepalive_time_when(tp) */ elapsed = keepalive_time_when(tp) - elapsed; } TCP_CHECK_TIMER(sk); sk_stream_mem_reclaim(sk); resche...
这个顺序号域出现的是13),但因为在该段中没有数据,所以tcpdump没有打印顺序号域(对于空段,tcpdump只在设置有SYN,FIN或RST标志的时候才打印顺序号。)正是这个不正确的顺序号强迫服务器的TCP对存活探测做出响应。
The TCP Keepalive Timer feature provides a mechanism to identify dead connections. When a TCP connection on a routing device is idle for too long, the device sends a TCP keepalive packet to the peer with only the Acknowledgment (ACK) flag turned...
BGP在established状态中,控制台信息会跳出keepalive timer expiry,请问这个是由于什么原因造成的?()A.TCP连接中断B.没有收到对端的