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NAME

     Net::protoent - by-name interface to Perl's built-in
     getproto*() functions



SYNOPSIS
      use Net::protoent;
      $p = getprotobyname(shift || 'tcp') || die "no proto";
      printf "proto for %s is %d, aliases are %s\n",
         $p->name, $p->proto, "@{$p->aliases}";

      use Net::protoent qw(:FIELDS);
      getprotobyname(shift || 'tcp') || die "no proto";
      print "proto for $p_name is $p_proto, aliases are @p_aliases\n";




DESCRIPTION
     This module's default exports override the core
     getprotoent(), getprotobyname(), and getnetbyport()
     functions, replacing them with versions that return
     "Net::protoent" objects.  They take default second arguments
     of "tcp".  This object has methods that return the similarly
     named structure field name from the C's protoent structure
     from netdb.h; namely name, aliases, and proto.  The aliases
     method returns an array reference, the rest scalars.

     You may also import all the structure fields directly into
     your namespace as regular variables using the :FIELDS import
     tag.  (Note that this still overrides your core functions.)
     Access these fields as variables named with a preceding p_.
     Thus, $proto_obj->name() corresponds to $p_name if you
     import the fields.  Array references are available as
     regular array variables, so for example @{ $proto_obj-
     >aliases() } would be simply @p_aliases.

     The getproto() function is a simple front-end that forwards
     a numeric argument to getprotobyport(), and the rest to
     getprotobyname().

     To access this functionality without the core overrides,
     pass the use an empty import list, and then access function
     functions with their full qualified names.  On the other
     hand, the built-ins are still available via the CORE::
     pseudo-package.



NOTE
     While this class is currently implemented using the
     Class::Struct module to build a struct-like class, you
     shouldn't rely upon this.



AUTHOR
     Tom Christiansen









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Created 1996-2024 by Maxim Chirkov

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