IO::Interface(3pm)

1IO::Interface(3)      User Contributed Perl Documentation     IO::Interface(3)
2
3
4

NAME

6       IO::Interface - Perl extension for access to network card configuration
7       information
8

SYNOPSIS

10        # ======================
11        # the new, preferred API
12        # ======================
13
14        use IO::Interface::Simple;
15
16        my $if1   = IO::Interface::Simple->new('eth0');
17        my $if2   = IO::Interface::Simple->new_from_address('127.0.0.1');
18        my $if3   = IO::Interface::Simple->new_from_index(1);
19
20        my @interfaces = IO::Interface::Simple->interfaces;
21
22        for my $if (@interfaces) {
23           print "interface = $if\n";
24           print "addr =      ",$if->address,"\n",
25                 "broadcast = ",$if->broadcast,"\n",
26                 "netmask =   ",$if->netmask,"\n",
27                 "dstaddr =   ",$if->dstaddr,"\n",
28                 "hwaddr =    ",$if->hwaddr,"\n",
29                 "mtu =       ",$if->mtu,"\n",
30                 "metric =    ",$if->metric,"\n",
31                 "index =     ",$if->index,"\n";
32
33           print "is running\n"     if $if->is_running;
34           print "is broadcast\n"   if $if->is_broadcast;
35           print "is p-to-p\n"      if $if->is_pt2pt;
36           print "is loopback\n"    if $if->is_loopback;
37           print "is promiscuous\n" if $if->is_promiscuous;
38           print "is multicast\n"   if $if->is_multicast;
39           print "is notrailers\n"  if $if->is_notrailers;
40           print "is noarp\n"       if $if->is_noarp;
41         }
42
43
44         # ===========
45         # the old API
46         # ===========
47
48         use IO::Socket;
49         use IO::Interface qw(:flags);
50
51         my $s = IO::Socket::INET->new(Proto => 'udp');
52         my @interfaces = $s->if_list;
53
54         for my $if (@interfaces) {
55           print "interface = $if\n";
56           my $flags = $s->if_flags($if);
57           print "addr =      ",$s->if_addr($if),"\n",
58                 "broadcast = ",$s->if_broadcast($if),"\n",
59                 "netmask =   ",$s->if_netmask($if),"\n",
60                 "dstaddr =   ",$s->if_dstaddr($if),"\n",
61                 "hwaddr =    ",$s->if_hwaddr($if),"\n";
62
63           print "is running\n"     if $flags & IFF_RUNNING;
64           print "is broadcast\n"   if $flags & IFF_BROADCAST;
65           print "is p-to-p\n"      if $flags & IFF_POINTOPOINT;
66           print "is loopback\n"    if $flags & IFF_LOOPBACK;
67           print "is promiscuous\n" if $flags & IFF_PROMISC;
68           print "is multicast\n"   if $flags & IFF_MULTICAST;
69           print "is notrailers\n"  if $flags & IFF_NOTRAILERS;
70           print "is noarp\n"       if $flags & IFF_NOARP;
71         }
72
73         my $interface = $s->addr_to_interface('127.0.0.1');
74

DESCRIPTION

76       IO::Interface adds methods to IO::Socket objects that allows them to be
77       used to retrieve and change information about the network interfaces on
78       your system.  In addition to the object-oriented access methods, you
79       can use a function-oriented style.
80
81       THIS API IS DEPRECATED. Please see IO::Interface::Simple for the
82       preferred way to get and set interface configuration information.
83
84   Creating a Socket to Access Interface Information
85       You must create a socket before you can access interface information.
86       The socket does not have to be connected to a remote site, or even used
87       for communication.  The simplest procedure is to create a UDP protocol
88       socket:
89
90         my $s = IO::Socket::INET->new(Proto => 'udp');
91
92       The various IO::Interface functions will now be available as methods on
93       this socket.
94
95   Methods
96       @iflist = $s->if_list
97           The if_list() method will return a list of active interface names,
98           for example "eth0" or "tu0".  If no interfaces are configured and
99           running, returns an empty list.
100
101       $addr = $s->if_addr($ifname [,$newaddr])
102           if_addr() gets or sets the interface address.  Call with the
103           interface name to retrieve the address (in dotted decimal format).
104           Call with a new address to set the interface.  In the latter case,
105           the routine will return a true value if the operation was
106           successful.
107
108             my $oldaddr = $s->if_addr('eth0');
109             $s->if_addr('eth0','192.168.8.10') || die "couldn't set address: $!";
110
111           Special case: the address of the pseudo-device "any" will return
112           the IP address "0.0.0.0", which corresponds to the INADDR_ANY
113           constant.
114
115       $broadcast = $s->if_broadcast($ifname [,$newbroadcast]
116           Get or set the interface broadcast address.  If the interface does
117           not have a broadcast address, returns undef.
118
119       $mask = $s->if_netmask($ifname [,$newmask])
120           Get or set the interface netmask.
121
122       $dstaddr = $s->if_dstaddr($ifname [,$newdest])
123           Get or set the destination address for point-to-point interfaces.
124
125       $hwaddr = $s->if_hwaddr($ifname [,$newhwaddr])
126           Get or set the hardware address for the interface. Currently only
127           ethernet addresses in the form "00:60:2D:2D:51:70" are accepted.
128
129       $flags = $s->if_flags($ifname [,$newflags])
130           Get or set the flags for the interface.  The flags are a bitmask
131           formed from a series of constants.  See "Exportable constants"
132           below.
133
134       $ifname = $s->addr_to_interface($ifaddr)
135           Given an interface address in dotted form, returns the name of the
136           interface associated with it.  Special case: the INADDR_ANY
137           address, 0.0.0.0 will return a pseudo-interface name of "any".
138
139   EXPORT
140       IO::Interface exports nothing by default.  However, you can import the
141       following symbol groups into your namespace:
142
143         :functions   Function-oriented interface (see below)
144         :flags       Flag constants (see below)
145         :all         All of the above
146
147   Function-Oriented Interface
148       By importing the ":functions" set, you can access IO::Interface in a
149       function-oriented manner.  This imports all the methods described above
150       into your namespace.  Example:
151
152         use IO::Socket;
153         use IO::Interface ':functions';
154
155         my $sock = IO::Socket::INET->new(Proto=>'udp');
156         my @interfaces = if_list($sock);
157         print "address = ",if_addr($sock,$interfaces[0]);
158
159   Exportable constants
160       The ":flags" constant imports the following constants for use with the
161       flags returned by if_flags():
162
163         IFF_ALLMULTI
164         IFF_AUTOMEDIA
165         IFF_BROADCAST
166         IFF_DEBUG
167         IFF_LOOPBACK
168         IFF_MASTER
169         IFF_MULTICAST
170         IFF_NOARP
171         IFF_NOTRAILERS
172         IFF_POINTOPOINT
173         IFF_PORTSEL
174         IFF_PROMISC
175         IFF_RUNNING
176         IFF_SLAVE
177         IFF_UP
178
179       This example determines whether interface 'tu0' supports multicasting:
180
181         use IO::Socket;
182         use IO::Interface ':flags';
183         my $sock = IO::Socket::INET->new(Proto=>'udp');
184         print "can multicast!\n" if $sock->if_flags & IFF_MULTICAST.
185

AUTHOR

187       Lincoln D. Stein <lincoln.stein@gmail.com> Copyright 2001-2014, Lincoln
188       D. Stein.
189
190       This library is distributed under the Perl Artistic License 2.0. Please
191       see LICENSE for more information.
192

SUPPORT

194       For feature requests, bug reports and code contributions, please use
195       the GitHub repository at https://github.com/lstein/LibIO-Interface-Perl
196

NAME

SYNOPSIS

DESCRIPTION

AUTHOR

SUPPORT

SEE ALSO