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-   -   gethostbyaddr vs getaddrinfo and getnameinfo (

icegood 12-27-2012 08:32 AM

gethostbyaddr vs getaddrinfo and getnameinfo
Why gethostbyaddr treated as obsolete and getaddrinfo and getnameinfo should be used instead, if unde latter one i'm unable to get aliases from /etc/hosts while in case gethostbyaddr i will?

nini09 12-28-2012 02:21 PM

The gethostbyaddr performs netbios lookup. It is very slow when the host can't be found. The getnameinfo only contact DNS server, should be faster.

icegood 12-29-2012 05:29 PM

Thanks, what about aliases in /etc/hosts? Why they become unavailable under DNS?

nini09 12-31-2012 03:04 PM

In general, the file is for domain name and static host name. Some distribution could change file name to another one. It look like no affaction.

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