ia64/xen-unstable

view tools/examples/vif-common.sh @ 7860:3867d93d86f7

Downgrade the failure to change the iptables settings from fatal to an error.
Even though we are checking for a working iptables installation, it is still
possible that the user does not have the PHYSDEV matcher installed, so just
issue a diagnostic instead.

Signed-off-by: Ewan Mellor <ewan@xensource.com>
author emellor@leeni.uk.xensource.com
date Wed Nov 16 15:25:22 2005 +0100 (2005-11-16)
parents 60bf9aa39043
children 83bc047bb346
line source
1 #
2 # Copyright (c) 2005 XenSource Ltd.
3 #
4 # This library is free software; you can redistribute it and/or
5 # modify it under the terms of version 2.1 of the GNU Lesser General Public
6 # License as published by the Free Software Foundation.
7 #
8 # This library is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 # Lesser General Public License for more details.
12 #
13 # You should have received a copy of the GNU Lesser General Public
14 # License along with this library; if not, write to the Free Software
15 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 #
19 dir=$(dirname "$0")
20 . "$dir/xen-hotplug-common.sh"
21 . "$dir/xen-network-common.sh"
23 findCommand "$@"
25 if [ "$command" != "online" ] &&
26 [ "$command" != "offline" ] &&
27 [ "$command" != "add" ] &&
28 [ "$command" != "remove" ]
29 then
30 log err "Invalid command: $command"
31 exit 1
32 fi
34 case "$command" in
35 add | remove)
36 exit 0
37 ;;
38 esac
41 # Parameters may be read from the environment, the command line arguments, and
42 # the store, with overriding in that order. The environment is given by the
43 # driver, the command line is given by the Xend global configuration, and
44 # store details are given by the per-domain or per-device configuration.
46 evalVariables "$@"
48 ip=${ip:-}
49 ip=$(xenstore_read_default "$XENBUS_PATH/ip" "$ip")
51 # Check presence of compulsory args.
52 XENBUS_PATH="${XENBUS_PATH:?}"
53 vif="${vif:?}"
56 function frob_iptable()
57 {
58 if [ "$command" == "online" ]
59 then
60 local c="-A"
61 else
62 local c="-D"
63 fi
65 iptables "$c" FORWARD -m physdev --physdev-in "$vif" "$@" -j ACCEPT ||
66 log err \
67 "iptables $c FORWARD -m physdev --physdev-in $vif $@ -j ACCEPT failed.
68 If you are using iptables, this may affect networking for guest domains."
69 }
72 ##
73 # Add or remove the appropriate entries in the iptables. With antispoofing
74 # turned on, we have to explicitly allow packets to the interface, regardless
75 # of the ip setting. If ip is set, then we additionally restrict the packets
76 # to those coming from the specified networks, though we allow DHCP requests
77 # as well.
78 #
79 function handle_iptable()
80 {
81 # Check for a working iptables installation. Checking for the iptables
82 # binary is not sufficient, because the user may not have the appropriate
83 # modules installed. If iptables is not working, then there's no need to do
84 # anything with it, so we can just return.
85 if ! iptables -L >&/dev/null
86 then
87 return
88 fi
90 if [ "$ip" != "" ]
91 then
92 local addr
93 for addr in "$ip"
94 do
95 frob_iptable -s "$addr"
96 done
98 # Always allow the domain to talk to a DHCP server.
99 frob_iptable -p udp --sport 68 --dport 67
100 else
101 # No IP addresses have been specified, so allow anything.
102 frob_iptable
103 fi
104 }