CN102404279A - Accurate judging method and system of moving distance in network - Google Patents
Accurate judging method and system of moving distance in network Download PDFInfo
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- CN102404279A CN102404279A CN201010276998XA CN201010276998A CN102404279A CN 102404279 A CN102404279 A CN 102404279A CN 201010276998X A CN201010276998X A CN 201010276998XA CN 201010276998 A CN201010276998 A CN 201010276998A CN 102404279 A CN102404279 A CN 102404279A
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Abstract
An accurate judging method of moving distance in a network includes: a server side periodically sends messages containing server side time to a client side so as to update client side time; the client end sends a first moving message to the server side, and a server obtains a first delay according to the server side time and the client side time in the first moving message; the client side sends a second moving message to the server, and the server obtains a second relay according to the server side time and client side time in the second moving message; the client side moves a distance within the time interval between the first moving message and the second moving message, and when the distance is the same as the position interval within the time interval of the client side, the moving distance is correct; and otherwise, the moving distance is incorrect. The invention further discloses an accurate judging device of moving distance in the network. By means of the accurate judging method and the system of moving distance in the network, moving distance is accurately judged, and limitations and insecurities in existence are avoided.
Description
Technical field
The present invention relates to networking technology area, more specifically, relate to the accurate determination methods and the system of displacement in a kind of network.
Background technology
Online game is divided into the client and server end.In client, when the player is moved, will comprise that player's position, moving direction, translational speed and the mobile messaging of mobile time of origin are sent to server end.Server end uses cheating software change data bag content according to the correctness of following technical proposals judgement player shift position to avoid the player.
For example, referring to Fig. 1, last reference axis is the client time reference axis, and following reference axis is a server end time coordinate axle.When the dotted line representative did not have network delay, client was sent mobile messaging to server end at Tc1, and server end is received this mobile messaging at Tc1; When the solid line representative had network delay, client was sent mobile messaging to server end at Tc1, and server end is received this mobile messaging at Ts1, and the client time delay equals Ts1-Tc1.
Client is sent first mobile messaging at Tc1 to server end, tells the server end player to move from the position of range coordinate point of origin P c1, and moving direction to the right, translational speed was 100 pixel/seconds; Client is sent second mobile messaging at Tc2 to server end, tells the server end player to move from the position of range coordinate point of origin P c2, and moving direction makes progress, translational speed was 100 pixel/seconds.Client for not using cheating software has: Pc2 equal Pc1 with move in the time at Tc2-Tc1 apart from sum, i.e. 100 pixel/seconds of Pc2=Pc1+ (Tc2-Tc1) *.
But because network delay, server end is received the mobile message that first mobile messaging is corresponding at Ts1, and server end is received the mobile message that second mobile messaging is corresponding at Ts2.If client is not used cheating software, then the player equals the player in the mobile distance of server end (Ts2-Ts1) in the distance that client (Tc2-Tc1) moved in the time interval.Pc1 is correct in first message, according to translational speed in first message, Pc2=Pc1+ (Tc2-Tc1) * 100=Ps1+ (Ts2-Ts1) * 100 is arranged, and can know: Tc2-Tc1=Ts2-Ts1.
Can be in actual application, the network delay of client and server end is a time to time change, and does not have fixing Changing Pattern.For example, in accompanying drawing 2, Ts1-Tc1＞Ts2-Tc2 then has Tc2-Tc1＞Ts2-Ts1.Tend to occur Tc2-Tc1 ≠ Ts2-Ts1, promptly Tc2-Tc1 is greater than Ts2-Ts1, or Tc2-Tc1 is less than Ts2-Ts1.Therefore, the player is not equal to the player in the mobile distance of server end (Ts2-Ts1) in the distance that client (Tc2-Tc1) moved in the time interval.
For this reason, server end is provided with a network fluctuation error range, is 0.5 second like the fluctuation range of proper network, then when | (Ts2-Ts1)-(Tc2-Tc1) | in the time of≤0.5 second, server end judges that the mobile of client player is legal.So when player's translational speed is 100 pixels/second, client player's site error is within 0.5 second * 100 pixels/second=50 pixel, and server end judges that the player position of client is correct.
When client network time delay during greater than 0.5s, server end is bound to judge that the client player position is wrong; And, in cheating software, utilize the poor of maximum fluctuation extreme value and the actual time delay of client when the time delay of client during smaller or equal to 0.5s, can increase the actual mobile distance of player.For example; The time of client is 0.3s; The maximum fluctuation extreme value is 0.5s; Utilizing the time delay that cheating software can notification server end client is 0.5s, and the distance that then moves the server end player is 0.5 second * 100 pixels/second=50 pixel, and is 0.3 second * 100 pixels/second=30 pixel in the distance that the client player moves.
Thus it is clear that,, when the client network situation is relatively poor, can influence the use of client when less maximum fluctuation extreme value is set; And bigger maximum fluctuation extreme value is set, client can utilize cheating software to adjust actual displacement.The judgement of network mobile position exists limitation and insecurity in the prior art.
Summary of the invention
The embodiment of the invention proposes the accurate determination methods of displacement in a kind of network, under the various network situation of client, accurately judges displacement, has solved the limitation and the insecurity that exist.
The embodiment of the invention also proposes the accurate judgement system of displacement in a kind of network, under the various network situation of client, accurately judges displacement, has solved the limitation and the insecurity that exist.
The technical scheme of the embodiment of the invention is following:
The accurate determination methods of displacement in a kind of network, this method comprises:
Server end periodically sends the message that comprises the server end time to client, and client is upgraded client time according to server time;
The user end to server end sends first and moves message, and the client time that server moved in the message according to the server end time and first obtains first time delay, if first time delay is greater than the threshold value of setting, then this judgement inefficacy in advance;
If first time delay is smaller or equal to said threshold value; Then user end to server sends second and moves message; The client time that server moved in the message according to the server end time and second obtains second time delay, and greater than said threshold value, then this judges inefficacy as if second time delay;
If second time delay is smaller or equal to said threshold value; To move the distance that moves in time interval of message identical with the location interval of client in the said time interval when client moves message and second first, and then to move the displacement that message and second moves between message first be correct to client; Said distance is unequal with said location interval, and it is wrong that client moves the displacement that message and second moves between message first.
Said renewal comprises, when client time less than the server end time in the said message, then will be updated to the server end time in the said message client time; Otherwise said client time remains unchanged.
Saidly move client time in the message according to the server end time and first and obtain first time delay and comprise, the said server end time and said first moves client time in the message and subtracts each other and obtain said first time delay.
Saidly move client time in the message according to the server end time and second and obtain second time delay and comprise, the said server end time and said second moves client time in the message and subtracts each other and obtain said second time delay.
Said distance equals server end and receives that said first moves the product that time interval and said first that message and said second moves message moves the translational speed in the message.
Said location interval equals said first and moves position and said second in the message and move the poor of position in the message.
The accurate judgement system of displacement in a kind of network, said system comprises server end and client,
Said server end is used for periodically sending the message that comprises the server end time to client, and the client time of moving in the message according to the server end time and first obtains first time delay, judges that whether first time delay is greater than the threshold value that is provided with in advance; The client time of moving in the message according to the server end time and second obtains second time delay, judges that whether second time delay is greater than said threshold value; Whether moving message and second according to client first, to move the distance that moves in time interval of message identical with the location interval of client in the said time interval, judges whether client moves the displacement that message and second moves between message first correct;
Said client is used for upgrading client time according to server time; The user end to server end sends first and moves message, and smaller or equal to said threshold value, then user end to server sends second and moves message as if first time delay.
Said server end comprises, control module and judge module,
Said control module is used for periodically sending the message that comprises the server end time to client;
Said judge module is used for obtaining first time delay according to the client time that the server end time and first is moved message, judges that whether first time delay is greater than the threshold value that is provided with in advance; The client time of moving in the message according to the server end time and second obtains second time delay, judges that whether second time delay is greater than said threshold value; Whether moving message and second according to client first, to move the distance that moves in time interval of message identical with the location interval of client in the said time interval, judges whether client moves the displacement that message and second moves between message first correct.
Said client comprises, update module and sending module,
Said update module is used for upgrading client time according to server time;
Said sending module is used for the user end to server end and send moves message, if first move first time delay that obtains after message sends smaller or equal to said threshold value, then user end to server sends second and moves message.
Can find out that from technique scheme in embodiments of the present invention, server end periodically sends the message that comprises the server end time to client, client is upgraded client time according to server time; Guaranteed the lower-delay of client time and server time.The user end to server end sends first and moves message, and the client time that server moved in the message according to the server end time and first obtains first time delay, if first time delay is greater than the threshold value of setting, then this judgement inefficacy in advance; If first time delay is smaller or equal to this threshold value; Then user end to server sends second and moves message; The client time that server moved in the message according to the server end time and second obtains second time delay, and greater than said threshold value, then this judges inefficacy as if second time delay; If greater than this threshold value, then judging, first time delay or second time delay lost efficacy.Only in first time delay and second time delay during all less than said threshold value; Whether moving message and second according to client first, to move the distance that moves in time interval of message identical with the location interval of client in the said time interval, judges whether client moves the displacement that message and second moves between message first correct.Through adjusting client time constantly, judge the displacement of judges end in the time interval in time delay to client.Can carry out accurately effectively judging to the displacement of client according to the difference of network condition, avoid user side to use cheating software, solve the limitation and the insecurity that exist.
Description of drawings
Fig. 1 sends the mobile messaging sketch map for the user end to server end;
Fig. 2 is that the user end to server end sends the mobile messaging sketch map under the heterogeneous networks situation;
Fig. 3 is the schematic flow sheet of the accurate determination methods of displacement in the embodiment of the invention network;
Fig. 4 is the sketch map of embodiment of the invention server end to the client send server time;
Fig. 5 is the structural representation of the accurate judgment means of displacement in the embodiment of the invention network.
Embodiment
For making the object of the invention, technical scheme and advantage express clearlyer, the present invention is remake further detailed explanation below in conjunction with accompanying drawing and specific embodiment.
In embodiments of the present invention, at first server end periodically sends message to client, upgrades client time by the server end time, makes client time more approach the server end time.Even when network condition is relatively poor since before under the quite good network status situation, upgrade client time constantly, then not can because of this moment relatively poor network condition directly influence client time.First message that sends through the user end to server end obtains first time delay; If first time delay is smaller or equal to the threshold value that is provided with in advance; Then client is sent second message to server end again, obtains second time delay by second message, judges the relation of second time delay and threshold value.Passing threshold is judged the validity of time delay, when time delay greater than threshold value then client might utilize cheating software to participate in recreation, so time delay need not further to judge greater than threshold value, avoids client utilization cheating software.When second time delay smaller or equal to threshold value, just the displacement between twice message of client is judged.And then whether the displacement that can accurately judge client is correct, guaranteed the fail safe of client and server info.
Referring to accompanying drawing 3 is the schematic flow sheet of the accurate determination methods of displacement, specifically may further comprise the steps:
Server end periodically sends the message that comprises the server end time to client.The numerical value in cycle confirms that as the case may be this paper repeats no more.Because network delay, this message need be through arriving client after a while.Therefore, the time of client is not consistent with the server end time.
Server end sends the message that comprises the server end time to client first.After client was received this message, it was the time that server sends this message that client time is set, and promptly client time equals the server time in the message.Client is constantly received the message that has the server end time that server end sends; Client is upgraded client time according to the server end time and is specifically comprised: during the time, then will be updated to the server end time in the said message less than the server end in this message client time when client time; Otherwise client time remains unchanged.According to aforesaid way, the client time=server end time+server end to client lower-delay.Illustrate below according to the server end time and upgrade client time.
For example, are server ends to the sketch map of client send server time referring to accompanying drawing 4, server periodically sends the message that includes server time to client.Cycle is set to 1 second.1 second time delay of server time is Tc1-1, and 2 seconds time delay of server time is Tc2-2, and 3 seconds time delay of server time is Tc3-3.Obvious by Fig. 4, (Tc1-1)＞(Tc3-3)＞(Tc2-2).
2 seconds server end time, server end sent to client and includes 2 seconds message of server time, because the network delay client is received this message at Tc2.The client time of this moment equals 1+Tc2-Tc1, and the server time in the message is 2 seconds.Judge client time and 2 seconds relation of server time.The time delay of 1 second server end time is greater than 2 seconds time delay of server end, i.e. (Tc1-1)＞(Tc2-2) has Tc2-Tc1＜1, and 1+Tc2-Tc1＜2 are then arranged, promptly client time < server time.Adjust client time, make client time=server time.
The user end to server end sends first and moves message, and the client time that server moved in the message according to the server end time and first obtains first time delay, and greater than the threshold value that is provided with in advance, then execution in step 307 as if first time delay; Otherwise, steps performed 303.
The user end to server end sends and to comprise that first of client time moves message.When server end receive first move message after, server end time and client time subtract each other and obtain first time delay.Under the normal condition, because the time delay between client and the server end, client time is less than the server end time.If but used cheating software in client, client time will appear greater than the server end time.The said server end time and said first moves client time in the message and subtracts each other and obtain said first time delay.Through whether judging first time delay, distinguish whether message is moved in transmission this time effective greater than threshold value.Threshold value is the numerical value greater than 0, and exact numerical values recited confirms in advance that according to specific circumstances this paper repeats no more.
The user end to server end sends second and moves message, and the client time that server moved in the message according to the server end time and second obtains second time delay, and greater than threshold value, then execution in step 307 as if second time delay; Otherwise, steps performed 304.
When server end receive second move message after, server end time and client time subtract each other and obtain second time delay.
Judge and client move message and second whether move the distance that moves in time interval of message identical with the location interval of client in this time interval, if identical then steps performed 305 first; If inequality, then execution in step 306.
Server end receives that according to record first moves the server end time of message, receives that with record second moves the time of message, obtains first and moves the time interval that message and said second moves message.First moves translational speed and first in the message moves time interval that message and said second moves message and obtains client and move message and second first and move the distance that moves in the time interval of message.
Move the primary importance coordinate that message includes client first, same moves the second place coordinate that message includes client second.Can calculate the position that client first moves in the message by primary importance coordinate and initial point according to the range formula between 2 o'clock; Same, can calculate the position that client second moves in the message by second place coordinate and initial point according to the range formula between 2 o'clock.Origin is provided with according to actual needs.First moves the difference that position and second in the message moves the position in the message promptly first moves the interior location interval of the time interval that message and second moves message.
Move the distance that moves in time interval of message and equate when client moves message and second first, then judge and client move message and second to move distance mobile in the time interval of message correct first with the location interval of client in this time interval.
To move the distance that moves in time interval of message unequal with the location interval of client in this time interval when client moves message and second first, judges that then client moves message and second first and moves in time interval of message mobile apart from mistake.
When first time delay greater than threshold value or second time delay greater than threshold value, then judge this moment and lost efficacy.
Referring to accompanying drawing 5 are structural representations of the accurate judgment means of displacement in the network, specifically comprise:
Server end 501 comprises, control module 5012 and judge module 5011.
Control module 5011 is used for periodically sending the message that comprises the server end time to client;
Judge module 5012 is used for obtaining first time delay according to the client time that the server end time and first is moved message, judges that whether first time delay is greater than the threshold value that is provided with in advance; The client time of moving in the message according to the server end time and second obtains second time delay, judges that whether second time delay is greater than said threshold value; Whether moving message and second according to client first, to move the distance that moves in time interval of message identical with the location interval of client in the said time interval, judges whether client moves the displacement that message and second moves between message first correct.
Client 502 comprises, update module 5021 and sending module 5022,
Update module 5021 is used for upgrading client time according to server time;
Sending module 5022 is used for user end to server end transmission first and moves message, and smaller or equal to threshold value, then user end to server sends second and moves message as if first time delay.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the accurate determination methods of displacement in the network is characterized in that this method comprises:
Server end periodically sends the message that comprises the server end time to client, and client is upgraded client time according to server time;
The user end to server end sends first and moves message, and the client time that server moved in the message according to the server end time and first obtains first time delay, if first time delay is greater than the threshold value of setting, then this judgement inefficacy in advance;
If first time delay is smaller or equal to said threshold value; Then user end to server sends second and moves message; The client time that server moved in the message according to the server end time and second obtains second time delay, and greater than said threshold value, then this judges inefficacy as if second time delay;
If second time delay is smaller or equal to said threshold value; To move the distance that moves in time interval of message identical with the location interval of client in the said time interval when client moves message and second first, and then to move the displacement that message and second moves between message first be correct to client; Said distance is unequal with said location interval, and it is wrong that client moves the displacement that message and second moves between message first.
2. according to the accurate determination methods of displacement in the said network of claim 1, it is characterized in that said renewal comprises, when client time less than the server end time in the said message, then will be updated to the server end time in the said message client time; Otherwise said client time remains unchanged.
3. according to the accurate determination methods of displacement in the said network of claim 1; It is characterized in that; Saidly move client time in the message according to the server end time and first and obtain first time delay and comprise, the said server end time and said first moves client time in the message and subtracts each other and obtain said first time delay.
4. according to the accurate determination methods of displacement in the said network of claim 1; It is characterized in that; Saidly move client time in the message according to the server end time and second and obtain second time delay and comprise, the said server end time and said second moves client time in the message and subtracts each other and obtain said second time delay.
5. according to the accurate determination methods of displacement in the said network of claim 1; It is characterized in that said distance equals server end and receives that said first moves the product that time interval and said first that message and said second moves message moves the translational speed in the message.
6. according to the accurate determination methods of displacement in the said network of claim 1, it is characterized in that said location interval equals said first and moves position and said second in the message and move the poor of position in the message.
7. the accurate judgement system of displacement in the network is characterized in that said system comprises server end and client,
Said server end is used for periodically sending the message that comprises the server end time to client, and the client time of moving in the message according to the server end time and first obtains first time delay, judges that whether first time delay is greater than the threshold value that is provided with in advance; The client time of moving in the message according to the server end time and second obtains second time delay, judges that whether second time delay is greater than said threshold value; Whether moving message and second according to client first, to move the distance that moves in time interval of message identical with the location interval of client in the said time interval, judges whether client moves the displacement that message and second moves between message first correct;
Said client is used for upgrading client time according to server time; The user end to server end sends first and moves message, and smaller or equal to said threshold value, then user end to server sends second and moves message as if first time delay.
8. according to the accurate judgement system of displacement in the said network of claim 7, it is characterized in that said server end comprises, control module and judge module,
Said control module is used for periodically sending the message that comprises the server end time to client;
Said judge module is used for obtaining first time delay according to the client time that the server end time and first is moved message, judges that whether first time delay is greater than the threshold value that is provided with in advance; The client time of moving in the message according to the server end time and second obtains second time delay, judges that whether second time delay is greater than said threshold value; Whether moving message and second according to client first, to move the distance that moves in time interval of message identical with the location interval of client in the said time interval, judges whether client moves the displacement that message and second moves between message first correct.
9. according to the accurate judgement system of displacement in the said network of claim 7, it is characterized in that said client comprises, update module and sending module,
Said update module is used for upgrading client time according to server time;
Said sending module is used for the user end to server end and send moves message, if first move first time delay that obtains after message sends smaller or equal to said threshold value, then user end to server sends second and moves message.
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