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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)."That's what I thought at first, But the actual situation is not that simple, '74 spray' this kind of thing, Each person carries up to three fuel tanks at a time, A fuel tank can only be sprayed once, The advantage of this is that it is sprayed very hard at one time, The number of times that can be sprayed is too small, The four CWs at position 149 each had only two ammunition bases, Is that each person has six fuel tanks, That is, a total of 24 fuel tanks, Before encountering these big wasps, Because of the fierce fighting, The four of them have already consumed 19 fuel tanks, The remaining five fuel tanks were divided equally among the four people. Only the old squad leader of the chemical defense class with the best injection technology took one more. This was to make the limited fuel exert more power as much as possible. After the first battle with the big wasp, all five fuel tanks were sprayed out and the supply could not be available for a while, but the big wasp did not die at one time. "Zhang Xiaobo said.让她跟板栗小葱出去躲几年，就当外出游历好了。4. If it is not passed to the child view, the event is terminated and passed down, and the event starts to trace back, starting from the onTouchEvent of the parent view, the event returns from bottom to top to execute the onTouchEvent of each control----> return false;It seems that melee 1 second/A mage 1.6 seconds/A is about the same.出身普通的学霸张静美毕业后，一边面临着择业压力，一边稀里糊涂与霸道不羁的豪门少爷龙一领证结婚，过上了羡煞旁人“王子与公主的幸福生活”。然而，豪门生活和职场之路却没有想象中顺遂，现实的考验接二连三抛给这对新婚燕尔的小夫妻。当豪门少爷远离校园的象牙塔，开始踏进社会，与张静美共同迎接全新的考验时，一个接一个的难题都将等着他们去解答。