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Net::protoent(3)
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

Index for Section 3

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