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.

AUTHOR

       Paul Evans <leonerd@leonerd.org.uk>