W (ECN CWR), E (ECN-Echo) or `.' (ACK), or `none' if no flags are set. 打开man文档:man tcpdump 搜索:Flags are some combination: Flags are some combination of S (SYN), F(FIN), P (PUSH), R (RST), U (URG), W (ECN CWR),
Changing the * base_seq will change how the previous packets in the conversation * are processed in the second pass. */ tcpd->fwd->base_seq = tcph->th_seq; if(!tcpd->ta) tcp_analyze_get_acked_struct(pinfo->num, tcph->th_seq, tcph->th_ack, TRUE, tcpd); tcpd->ta->flags|...
12:06:58.014338 IP 192.168.100.1.5788 > 192.168.100.62.22: Flags [.], ack 1537, win 2053, length 0 12:06:58.069361 IP 192.168.100.1.5788 > 192.168.100.62.22: Flags [.], ack 1729, win 2052, length 0 10 packets captured 10 packets received by filter 0 packets dropped by kernel (14...
当两个支持ECN的TCP端进行TCP连接时,它们交换SYN,SYN-ACK和ACK包。对于支持ECN的TCP端来说,SYN包的ECE和CWR标志都被设置了。SYN-ACK只设置ECE标志。
Packets 111-114 already in flight (and now sending 115) ACK 112 (due to 111) cwnd = 5 + 1/5 ← back in congestion avoidance 可以看到发送报文的速度较为均匀。 最后补充一句:你提问时说的" 快速恢复就是在重传时TCP直接进入拥塞避免控制 "这句话似乎有点问题。 编辑于 2017-04-15 14:52 ...
HPING www.baidu.com (eth0 14.215.177.38): NO FLAGS are set, 40 headers + 100 data bytes ^C --- www.baidu.com hping statistic --- 5 packets tramitted, 0 packets received, 100% packet loss round-trip min/avg/max = 0.0/0.0/0.0 ms ...
Related –TCP FIN VS RST Packets Case 1: Local user initiates the close In this case, a four-way handshake termination could begin, when one side transmits a FIN packet which the other side acknowledges with an ACK. No further data from the user will be accepted by the TCP and it ente...
CLOSE-WAIT: When the receiver has received the FIN packet and acknowledged it. LAST-ACK: When the sender has received the FIN packet from the receiver and sent an ACK. TIME-WAIT: Ensures any delayed packets are handled before the connection is fully closed. ...
Set the descriptions of the ACL rules to Allow the ACK TCP packets through, Allow the RST TCP packets through, and Do not Allow the other TCP packet through. To meet the preceding requirement, configure two permit rules to allow the packets with the ACK or RST field being 1 from 192.168...
IP_INC_STATS(sock_net(sk), IPSTATS_MIB_OUTNOROUTES);returnerr; }/*进行路由查找,并校验返回的路由的类型, TCP是不被允许使用多播和广播的。*/if(rt->rt_flags & (RTCF_MULTICAST |RTCF_BROADCAST)) { ip_rt_put(rt);return-ENETUNREACH; ...