Patent US20040143579A1 successfully refreshed from Google Patents.
US20040143579A1
Expired / Lapsed
US
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Address query response method, program, and apparatus, and address notification method, program, and apparatus
Assignee: Canon Inc
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Filing: 2004-01-13
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Granted: —
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Expires: 2024-01-13
Abstract
Abstract Upon reception of a query about the address of a server from a client, a DNS server sends a query about the address of that server to an external DNS server. The DNS server checks based on the address obtained from the external DNS server if connection to the server can be established. If connection to the server cannot be established, and the DNS server receives a query about the address of the server, the DNS server returns a response indicating that the address is not available. When the address is returned before the check process, the DNS sever sets an expiration time shorter than that of the address of the server obtained from the external DNS server as the expiration time of the address of the server.
Inventors
- 👤 Hiroaki Nakazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:29
CPC Classifications
H; H04; H04L; H04L61/00; H04L61/45; H04L61/4505; H04L61/4511; H04L61/4535; H04L61/4557
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
64 words
1 . A response method to a query about an address, comprising steps of: receiving an address of a second apparatus from a first apparatus; conducting a connection test with the second apparatus; and returning. a message corresponding to the connection test result in the test step as a response to the query about the address of the second apparatus from the third apparatus.
Claim 2
Dependent Claim
64 words
1 . A response method to a query about an address, comprising steps of: receiving an address of a second apparatus from a first apparatus; conducting a connection test with the second apparatus; and returning. a message corresponding to the connection test result in the test step as a response to the query about the address of the second apparatus from the third apparatus.
Claim 3
Dependent Claim
36 words
2 . The method according to claim 1 , wherein the test step includes a step of conducting a connection test with the first apparatus using a protocol corresponding to the address of the second apparatus.
Claim 4
Dependent Claim
82 words
3 . The method according to claim 1 , wherein the reception step includes a step of receiving a first query about the address of the second apparatus, and receiving the address of the second apparatus from the first apparatus, and the returning step includes a step of receiving a second query about the address of the second apparatus, and returning the message corresponding to the connection test result in the test step to the third apparatus in response to the second.
Claim 5
Dependent Claim
89 words
4 . The method according to claim 1 , wherein the reception step comprises steps of: storing the address of the second apparatus; and inactivating the stored address of the second apparatus in accordance with an expiration time of the address of the second apparatus, the test step includes a step of repeating a connection test for the address of the second apparatus within the expiration time, and the returning step includes a step of returning the message corresponding to the latest connection test result in the test step.
Claim 6
Dependent Claim
62 words
5 . A response program to a query about an address, comprising steps of: receiving an address of a second apparatus from a first apparatus; conducting a connection test with the second apparatus; and returning a message corresponding to the connection test result in the test step in response to the query about the address of the second apparatus from the third.
Claim 7
Dependent Claim
62 words
5 . A response program to a query about an address, comprising steps of: receiving an address of a second apparatus from a first apparatus; conducting a connection test with the second apparatus; and returning a message corresponding to the connection test result in the test step in response to the query about the address of the second apparatus from the third.
Claim 8
Dependent Claim
36 words
6 . The program according to claim 5 , wherein the test step includes a step of conducting a connection test with the first apparatus using a protocol corresponding to the address of the second apparatus.
Claim 9
Dependent Claim
82 words
7 . The program according to claim 5 , wherein the reception step includes a step of receiving a first query about the address of the second apparatus, and receiving the address of the second apparatus from the first apparatus, and the returning step includes a step of receiving a second query about the address of the second apparatus, and returning the message corresponding to the connection test result in the test step to the third apparatus in response to the second.
Claim 10
Dependent Claim
89 words
8 . The program according to claim 5 , wherein the reception step comprises steps of: storing the address of the second apparatus; and inactivating the stored address of the second apparatus in accordance with an expiration time of the address of the second apparatus, the test step includes a step of repeating a connection test for the address of the second apparatus within the expiration time, and the returning step includes a step of returning the message corresponding to the latest connection test result in the test step.
Claim 11
Dependent Claim
91 words
9 . A response apparatus, comprising: connection unit which connects a network; and generation unit which generates a response message to a query about an address of a second apparatus, the query is received from a third apparatus via the network connected to said connection unit, wherein said generation unit conducts a connection test with the second apparatus in accordance with the address of the second apparatus received from a first apparatus via the network connected to said connection unit, and generates the response message corresponding to the connection test result.
Claim 12
Dependent Claim
91 words
9 . A response apparatus, comprising: connection unit which connects a network; and generation unit which generates a response message to a query about an address of a second apparatus, the query is received from a third apparatus via the network connected to said connection unit, wherein said generation unit conducts a connection test with the second apparatus in accordance with the address of the second apparatus received from a first apparatus via the network connected to said connection unit, and generates the response message corresponding to the connection test result.
Claim 13
Dependent Claim
32 words
10 . The apparatus according to claim 9 , wherein said generation unit conducts a connection test with the first apparatus using a protocol corresponding to the address of the second apparatus.
Claim 14
Dependent Claim
80 words
11 . The apparatus according to claim 9 , wherein said generation unit receives the address of the second apparatus from the first apparatus in response to a first query about the address of the second apparatus received via the network connected to said connection unit, and generates the response message to a second query about the address of the second apparatus, which is received via the network connected to said connection unit, in correspondence with the connection test result.
Claim 15
Dependent Claim
82 words
12 . The apparatus according to claim 9 , wherein said generation unit comprises storage unit which stores the address of the second apparatus, inactivates the address of the second apparatus stored in said storage unit in accordance with an expiration time of the address of the second apparatus, repeats a connection test for the address of the second apparatus within the expiration time stored in said storage unit, and generates the response message in accordance with the latest connection test result.
Claim 16
Dependent Claim
82 words
13 . An address notification method comprising the steps of: sending a query about address of a second apparatus to a first apparatus in response to a query about the address of the second apparatus received from a third apparatus and notifying, to the third apparatus, the address of the second apparatus and an expiration time of the address of the second apparatus which is shorter than an expiration time of the address of the second apparatus received from the first apparatus.
Claim 17
Dependent Claim
82 words
13 . An address notification method comprising the steps of: sending a query about address of a second apparatus to a first apparatus in response to a query about the address of the second apparatus received from a third apparatus and notifying, to the third apparatus, the address of the second apparatus and an expiration time of the address of the second apparatus which is shorter than an expiration time of the address of the second apparatus received from the first apparatus.
Claim 18
Dependent Claim
39 words
14 . The method according to claim 13 , wherein the notifying step includes a step of notifying, to the third apparatus, the expiration time prevents allow the third apparatus from re using the address of the second apparatus.
Claim 19
Dependent Claim
82 words
15 . An address notification program comprising the steps of: sending a query about address of a second apparatus to a first apparatus in response to a query about the address of the second apparatus received from a third apparatus and notifying, to the third apparatus, the address of the second apparatus and an expiration time of the address of the second apparatus which is shorter than an expiration time of the address of the second apparatus received from the first apparatus.
Claim 20
Dependent Claim
82 words
15 . An address notification program comprising the steps of: sending a query about address of a second apparatus to a first apparatus in response to a query about the address of the second apparatus received from a third apparatus and notifying, to the third apparatus, the address of the second apparatus and an expiration time of the address of the second apparatus which is shorter than an expiration time of the address of the second apparatus received from the first apparatus.
Claim 21
Dependent Claim
39 words
16 . The program according to claim 15 , wherein the notifying step includes a step of notifying, to the third apparatus, the expiration time that prevents the third apparatus from re using the address of the second apparatus.
Claim 22
Dependent Claim
105 words
17 . An address notification apparatus comprising: connection unit which connects a network; and notification unit which notifies an address of an second apparatus to a third apparatus via the network connected to said connection unit, wherein the notification unit sends a query about address of a second apparatus to a first apparatus in response to a query about the address of the second apparatus received from a third apparatus, and notifies, to the third apparatus, an expiration time of the address of the second apparatus which is shorter than an expiration time of the address of the second apparatus received from the first apparatus.
Claim 23
Dependent Claim
105 words
17 . An address notification apparatus comprising: connection unit which connects a network; and notification unit which notifies an address of an second apparatus to a third apparatus via the network connected to said connection unit, wherein the notification unit sends a query about address of a second apparatus to a first apparatus in response to a query about the address of the second apparatus received from a third apparatus, and notifies, to the third apparatus, an expiration time of the address of the second apparatus which is shorter than an expiration time of the address of the second apparatus received from the first apparatus.
Claim 24
Dependent Claim
35 words
18 . The apparatus according to claim 17 , wherein the notification unit notifies, to the third apparatus, the expiration time that prevents the third apparatus from re using the address of the second apparatus.
References Cited (Backward Citations)
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