A method and system for domain name resolution, and a client
A technology for domain name resolution and domain name resolution request, applied in the field of client, domain name resolution method and system, which can solve problems such as failure to connect to network services normally, protocol unable to make any detection or prompt, serious problems, etc.
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Embodiment 1
[0140] With respect to embodiment 1, present embodiment provides UDP transfer protocol, TCP transfer protocol and DNS agent domain name resolution based on HTTP agreement three options to carry out domain name resolution; Like this, with respect to embodiment 1, present embodiment specifically can comprise following two situation:
[0141] Situation 1. When the third domain name resolution and / or the fourth domain name resolution fail, perform DNS proxy domain name resolution based on the HTTP protocol;
[0142] Situation 2: Before performing the third domain name resolution and / or the fourth domain name resolution, perform DNS proxy domain name resolution based on the HTTP protocol, and if the DNS proxy domain name resolution fails, perform the third domain name resolution step.
[0143] In this way, when the UDP transfer protocol and the TCP transfer protocol are used for resolution failure, the success rate of DNS resolution can be further improved.
[0144] Existing domai...
Embodiment 2
[0191] Compared with Embodiment 2, this embodiment can perform current domain name resolution according to the set network service parameters, wherein the network service parameters can specifically include:
[0192] 1. Number of retries;
[0193] In the prior art, the Windows client fails to provide a programming interface for setting the DNSServer, and can only set the DNSServer facing the full Windows client, and cannot set the retry times option; and if only the UDP protocol is used as the transport layer protocol of the DNS protocol, then due to Due to the defect of UDP itself, it may not be parsed normally.
[0194] In view of the above situation, the present invention can improve the parsing success rate by retrying when the network condition is particularly bad.
[0195] 2. Timeout parameter.
[0196] In practice, the timeout parameter generally indicates the maximum time for the client to obtain the DNS response; the timeout parameter can avoid the problem that the ...
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