青青草a在线a国产/正片/高速云m3u8

Little Charlie nodded seriously.Application Method这么多年来，他虽然漂泊在外，却一直活得有滋有味。In TCP implementation, when receiving the SYN request from the client, the server needs to reply the SYN + ACK packet to the client, and the client also needs to send the confirmation packet to the server. Usually, the initial serial number of the server is calculated by the server according to certain rules or adopts random numbers. However, in SYN cookies, the initial serial number of the server is obtained by hash operation and encryption of the client IP address, client port, server IP address, server port and other security values, which is called cookie. When the server suffers from SYN attack and makes the backlog queue full, the server does not reject the new SYN request, but replies the cookie (SYN serial number of the reply packet) to the client. If it receives the ACK packet from the client, the server subtracts 1 from the ACK serial number of the client to obtain the cookie comparison value, and performs a hash operation on the above elements to see if it is equal to the cookie. If equal, complete the three-way handshake directly (Note: At this time, you don't need to check whether this connection belongs to the backlog queue).心里空空的，却没有几年前的伤心。莽汉见状急忙补充道：就是，这小子桀骜不逊，出手伤人，我兄弟不愿与之计较，否则怎会被打他打伤？打抱不平的年轻人冷冷道：呸，技不如人的孬种，还不知羞耻。