socket_getaddrinfop - Online in the Cloud

This is the command socket_getaddrinfop that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


"socket_getaddrinfo" - command-line tool to "getaddrinfo(3)" resolver

SYNOPSIS


socket_getaddrinfo [options...] host service

DESCRIPTION


This tool provides a convenient command-line wrapper around the getaddrinfo(3) resolver
function. It will perform a single lookup and print the returned results in a human-
readable form. This is mainly useful when debugging address resolution problems, because
it allows inspection of the getaddrinfo(3) behaviour itself, outside of any real program
that is trying to use it.

OPTIONS


--host, -H HOST
Hostname to resolve. If not supplied, will use the first positional argument

--service, -S SERVICE
Service name or port number to resolve. If not supplied, will use the second
positional argument.

-4 Restrict to just "AF_INET" (IPv4) results

-6 Restrict to just "AF_INET6" (IPv6) results

--stream
Restrict to just "SOCK_STREAM" results

--dgram Restrict to just "SOCK_DGRAM" results

--proto PROTO
Restrict to just results of the given IP protocol

--passive
Set the "AI_PASSIVE" hint; results will used to bind() and listen() rather than
connect()

--canonical
Retrive the canonical name for the requested host

--help Display a help summary and exit

OUTPUT FORMAT


Each line of output will be given in a form that indicates the four result fields of
"ai_family", "ai_socktype", "ai_protocol" and "ai_addr". The first three are printed in
the form of a socket(2) call, either symbolically or numerically, and the latter is
printed as a plain string following it. For example

socket(AF_INET , SOCK_STREAM, IPPROTO_TCP) + '127.0.0.1:80'

NOTE


Upstream this script is known as "getaddrinfo", but was renamed on Debian.

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