00b67f09dd
Also known as ISC bind. This import adds utilities such as host(1), dig(1), and nslookup(1), as well as many other tools and libraries. Change-Id: I035ca46e64f1965d57019e773f4ff0ef035e4aa3
49 lines
965 B
Plaintext
49 lines
965 B
Plaintext
Just for info, can be out of date.
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RFC 1876, 5.2, specially 5.2.3
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Important points:
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- LOC RRs are always attached to a *name*.
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- we can have two (or more) RRs for one address, one more specific than the other
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main
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if (host is a name)
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getLOCbyname
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else # host is an IP address
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gethostbyaddr
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if (name)
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getLOCbyname
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# If there is none, do not search. We assume the above was sufficient # (But check 5.2.2)
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else
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getLOCbyaddress
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getLOCbyname (host)
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get LOC for host
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if (it exists)
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OK
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else
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get all A records of the name
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foreach A record
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getLOCbyaddress
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OK at the first one found
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# we assume they are consistent
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END
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getLOCbyaddress (address)
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# May receive a mask. Otherwise, deduce it from the class
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makeNetAddress
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getLOCbynetwork
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getLOCbynetwork
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get PTR and A for it
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if (exist)
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getLOCbyname
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******* DIFFICULT : we have to manage a stack. See the code
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makeNetAddress (level--)
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getLOCbynetwork
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else
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END
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