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Linus Torvalds1da177e2005-04-16 15:20:36 -07001
2menu "UML Network Devices"
3 depends on NET
4
5# UML virtual driver
6config UML_NET
7 bool "Virtual network device"
8 help
9 While the User-Mode port cannot directly talk to any physical
10 hardware devices, this choice and the following transport options
11 provide one or more virtual network devices through which the UML
12 kernels can talk to each other, the host, and with the host's help,
13 machines on the outside world.
14
15 For more information, including explanations of the networking and
16 sample configurations, see
Karol Swietlicki0ba9d3f2008-02-04 22:30:38 -080017 <http://user-mode-linux.sourceforge.net/old/networking.html>.
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
19 If you'd like to be able to enable networking in the User-Mode
20 linux environment, say Y; otherwise say N. Note that you must
21 enable at least one of the following transport options to actually
22 make use of UML networking.
23
24config UML_NET_ETHERTAP
25 bool "Ethertap transport"
26 depends on UML_NET
27 help
28 The Ethertap User-Mode Linux network transport allows a single
29 running UML to exchange packets with its host over one of the
30 host's Ethertap devices, such as /dev/tap0. Additional running
31 UMLs can use additional Ethertap devices, one per running UML.
32 While the UML believes it's on a (multi-device, broadcast) virtual
33 Ethernet network, it's in fact communicating over a point-to-point
34 link with the host.
35
36 To use this, your host kernel must have support for Ethertap
Jeff Dike08b178e2005-09-03 15:57:12 -070037 devices. Also, if your host kernel is 2.4.x, it must have
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 CONFIG_NETLINK_DEV configured as Y or M.
39
40 For more information, see
Karol Swietlicki0ba9d3f2008-02-04 22:30:38 -080041 <http://user-mode-linux.sourceforge.net/old/networking.html> That site
Linus Torvalds1da177e2005-04-16 15:20:36 -070042 has examples of the UML command line to use to enable Ethertap
43 networking.
44
45 If you'd like to set up an IP network with the host and/or the
Jeff Dike08b178e2005-09-03 15:57:12 -070046 outside world, say Y to this, the Daemon Transport and/or the
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 Slip Transport. You'll need at least one of them, but may choose
48 more than one without conflict. If you don't need UML networking,
49 say N.
50
51config UML_NET_TUNTAP
52 bool "TUN/TAP transport"
53 depends on UML_NET
54 help
55 The UML TUN/TAP network transport allows a UML instance to exchange
56 packets with the host over a TUN/TAP device. This option will only
57 work with a 2.4 host, unless you've applied the TUN/TAP patch to
58 your 2.2 host kernel.
59
60 To use this transport, your host kernel must have support for TUN/TAP
61 devices, either built-in or as a module.
62
63config UML_NET_SLIP
64 bool "SLIP transport"
65 depends on UML_NET
66 help
67 The slip User-Mode Linux network transport allows a running UML to
68 network with its host over a point-to-point link. Unlike Ethertap,
69 which can carry any Ethernet frame (and hence even non-IP packets),
70 the slip transport can only carry IP packets.
71
72 To use this, your host must support slip devices.
73
74 For more information, see
Karol Swietlicki0ba9d3f2008-02-04 22:30:38 -080075 <http://user-mode-linux.sourceforge.net/old/networking.html>.
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 has examples of the UML command line to use to enable slip
77 networking, and details of a few quirks with it.
78
79 The Ethertap Transport is preferred over slip because of its
80 limitations. If you prefer slip, however, say Y here. Otherwise
Jeff Dike08b178e2005-09-03 15:57:12 -070081 choose the Multicast transport (to network multiple UMLs on
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 multiple hosts), Ethertap (to network with the host and the
83 outside world), and/or the Daemon transport (to network multiple
84 UMLs on a single host). You may choose more than one without
85 conflict. If you don't need UML networking, say N.
86
87config UML_NET_DAEMON
88 bool "Daemon transport"
89 depends on UML_NET
90 help
91 This User-Mode Linux network transport allows one or more running
92 UMLs on a single host to communicate with each other, but not to
93 the host.
94
95 To use this form of networking, you'll need to run the UML
96 networking daemon on the host.
97
98 For more information, see
Karol Swietlicki0ba9d3f2008-02-04 22:30:38 -080099 <http://user-mode-linux.sourceforge.net/old/networking.html> That site
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 has examples of the UML command line to use to enable Daemon
101 networking.
102
103 If you'd like to set up a network with other UMLs on a single host,
104 say Y. If you need a network between UMLs on multiple physical
105 hosts, choose the Multicast Transport. To set up a network with
106 the host and/or other IP machines, say Y to the Ethertap or Slip
107 transports. You'll need at least one of them, but may choose
108 more than one without conflict. If you don't need UML networking,
109 say N.
110
Jeff Dikead43c352007-10-16 01:26:48 -0700111config UML_NET_VDE
112 bool "VDE transport"
113 depends on UML_NET
114 help
115 This User-Mode Linux network transport allows one or more running
116 UMLs on a single host to communicate with each other and also
117 with the rest of the world using Virtual Distributed Ethernet,
118 an improved fork of uml_switch.
119
120 You must have libvdeplug installed in order to build the vde
121 transport into UML.
122
123 To use this form of networking, you will need to run vde_switch
124 on the host.
125
126 For more information, see <http://wiki.virtualsquare.org/>
127 That site has a good overview of what VDE is and also examples
128 of the UML command line to use to enable VDE networking.
129
130 If you need UML networking with VDE,
131 say Y.
132
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133config UML_NET_MCAST
134 bool "Multicast transport"
135 depends on UML_NET
136 help
137 This Multicast User-Mode Linux network transport allows multiple
138 UMLs (even ones running on different host machines!) to talk to
139 each other over a virtual ethernet network. However, it requires
140 at least one UML with one of the other transports to act as a
141 bridge if any of them need to be able to talk to their hosts or any
142 other IP machines.
143
144 To use this, your host kernel(s) must support IP Multicasting.
145
146 For more information, see
Karol Swietlicki0ba9d3f2008-02-04 22:30:38 -0800147 <http://user-mode-linux.sourceforge.net/old/networking.html> That site
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 has examples of the UML command line to use to enable Multicast
149 networking, and notes about the security of this approach.
150
151 If you need UMLs on multiple physical hosts to communicate as if
152 they shared an Ethernet network, say Y. If you need to communicate
153 with other IP machines, make sure you select one of the other
154 transports (possibly in addition to Multicast; they're not
155 exclusive). If you don't need to network UMLs say N to each of
156 the transports.
157
158config UML_NET_PCAP
159 bool "pcap transport"
Kees Cook75dacf52012-10-02 11:16:46 -0700160 depends on UML_NET
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 help
162 The pcap transport makes a pcap packet stream on the host look
Jeff Dike08b178e2005-09-03 15:57:12 -0700163 like an ethernet device inside UML. This is useful for making
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 UML act as a network monitor for the host. You must have libcap
165 installed in order to build the pcap transport into UML.
166
167 For more information, see
Karol Swietlicki0ba9d3f2008-02-04 22:30:38 -0800168 <http://user-mode-linux.sourceforge.net/old/networking.html> That site
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 has examples of the UML command line to use to enable this option.
170
171 If you intend to use UML as a network monitor for the host, say
172 Y here. Otherwise, say N.
173
174config UML_NET_SLIRP
175 bool "SLiRP transport"
176 depends on UML_NET
177 help
178 The SLiRP User-Mode Linux network transport allows a running UML
179 to network by invoking a program that can handle SLIP encapsulated
180 packets. This is commonly (but not limited to) the application
181 known as SLiRP, a program that can re-socket IP packets back onto
182 the host on which it is run. Only IP packets are supported,
183 unlike other network transports that can handle all Ethernet
184 frames. In general, slirp allows the UML the same IP connectivity
185 to the outside world that the host user is permitted, and unlike
186 other transports, SLiRP works without the need of root level
187 privleges, setuid binaries, or SLIP devices on the host. This
188 also means not every type of connection is possible, but most
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300189 situations can be accommodated with carefully crafted slirp
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 commands that can be passed along as part of the network device's
191 setup string. The effect of this transport on the UML is similar
192 that of a host behind a firewall that masquerades all network
193 connections passing through it (but is less secure).
Jeff Dike08b178e2005-09-03 15:57:12 -0700194
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 To use this you should first have slirp compiled somewhere
196 accessible on the host, and have read its documentation. If you
197 don't need UML networking, say N.
Jeff Dike08b178e2005-09-03 15:57:12 -0700198
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 Startup example: "eth0=slirp,FE:FD:01:02:03:04,/usr/local/bin/slirp"
200
201endmenu
202