arch/um/Kconfig_net

   1
   2 menu "UML Network Devices"
   3         depends on NET
   4
   5 # UML virtual driver
   6 config 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
  17         <http://user-mode-linux.sourceforge.net/networking.html>.
  18
  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
  24 config 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
  37         devices.  Also, if your host kernel is 2.4.x, it must have
  38         CONFIG_NETLINK_DEV configured as Y or M.
  39
  40         For more information, see
  41         <http://user-mode-linux.sourceforge.net/networking.html>  That site
  42         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
  46         outside world, say Y to this, the Daemon Transport and/or the
  47         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
  51 config 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
  63 config 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
  75         <http://user-mode-linux.sourceforge.net/networking.html>.  That site
  76         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
  81         choose the Multicast transport (to network multiple UMLs on
  82         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
  87 config 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
  99         <http://user-mode-linux.sourceforge.net/networking.html>  That site
 100         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
 111 config UML_NET_MCAST
 112         bool "Multicast transport"
 113         depends on UML_NET
 114         help
 115         This Multicast User-Mode Linux network transport allows multiple
 116         UMLs (even ones running on different host machines!) to talk to
 117         each other over a virtual ethernet network.  However, it requires
 118         at least one UML with one of the other transports to act as a
 119         bridge if any of them need to be able to talk to their hosts or any
 120         other IP machines.
 121
 122         To use this, your host kernel(s) must support IP Multicasting.
 123
 124         For more information, see
 125         <http://user-mode-linux.sourceforge.net/networking.html>  That site
 126         has examples of the UML command line to use to enable Multicast
 127         networking, and notes about the security of this approach.
 128
 129         If you need UMLs on multiple physical hosts to communicate as if
 130         they shared an Ethernet network, say Y.  If you need to communicate
 131         with other IP machines, make sure you select one of the other
 132         transports (possibly in addition to Multicast; they're not
 133         exclusive).  If you don't need to network UMLs say N to each of
 134         the transports.
 135
 136 config UML_NET_PCAP
 137         bool "pcap transport"
 138         depends on UML_NET && BROKEN
 139         help
 140         The pcap transport makes a pcap packet stream on the host look
 141         like an ethernet device inside UML.  This is useful for making
 142         UML act as a network monitor for the host.  You must have libcap
 143         installed in order to build the pcap transport into UML.
 144
 145         For more information, see
 146         <http://user-mode-linux.sourceforge.net/networking.html>  That site
 147         has examples of the UML command line to use to enable this option.
 148
 149         If you intend to use UML as a network monitor for the host, say
 150         Y here.  Otherwise, say N.
 151
 152 config UML_NET_SLIRP
 153         bool "SLiRP transport"
 154         depends on UML_NET
 155         help
 156         The SLiRP User-Mode Linux network transport allows a running UML
 157         to network by invoking a program that can handle SLIP encapsulated
 158         packets.  This is commonly (but not limited to) the application
 159         known as SLiRP, a program that can re-socket IP packets back onto
 160         the host on which it is run.  Only IP packets are supported,
 161         unlike other network transports that can handle all Ethernet
 162         frames.  In general, slirp allows the UML the same IP connectivity
 163         to the outside world that the host user is permitted, and unlike
 164         other transports, SLiRP works without the need of root level
 165         privleges, setuid binaries, or SLIP devices on the host.  This
 166         also means not every type of connection is possible, but most
 167         situations can be accomodated with carefully crafted slirp
 168         commands that can be passed along as part of the network device's
 169         setup string.  The effect of this transport on the UML is similar
 170         that of a host behind a firewall that masquerades all network
 171         connections passing through it (but is less secure).
 172
 173         To use this you should first have slirp compiled somewhere
 174         accessible on the host, and have read its documentation.  If you
 175         don't need UML networking, say N.
 176
 177         Startup example: "eth0=slirp,FE:FD:01:02:03:04,/usr/local/bin/slirp"
 178
 179 endmenu
 180