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1 #!/bin/bash
2 ###############################################################################
3 # #
4 # IPFire.org - A linux based firewall #
5 # Copyright (C) 2014 IPFire Team <info@ipfire.org> #
6 # #
7 # This program is free software: you can redistribute it and/or modify #
8 # it under the terms of the GNU General Public License as published by #
9 # the Free Software Foundation, either version 3 of the License, or #
10 # (at your option) any later version. #
11 # #
12 # This program is distributed in the hope that it will be useful, #
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of #
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
15 # GNU General Public License for more details. #
16 # #
17 # You should have received a copy of the GNU General Public License #
18 # along with this program. If not, see <http://www.gnu.org/licenses/>. #
19 # #
20 ###############################################################################
21
22 function list_interfaces() {
23 local interface
24
25 for interface in /sys/class/net/*; do
26 [ -d "${interface}" ] || continue
27
28 interface="$(basename ${interface})"
29 case "${interface}" in
30 eth*)
31 echo "${interface}"
32 ;;
33 esac
34 done
35 }
36
37 function try_dhcp() {
38 local interface="${1}"
39
40 # Bring up the interface
41 ip link set "${interface}" up
42
43 # Try to make the lights of the adapter light up
44 ethtool -i "${interface}" &>/dev/null
45
46 # Start the DHCP client
47 dhcpcd "${interface}"
48 }
49
50 function main() {
51 local interface
52 for interface in $(list_interfaces); do
53 if ! try_dhcp "${interface}"; then
54 echo "Could not acquire an IP address on ${interface}"
55 continue
56 fi
57
58 echo "Successfully started on ${interface}"
59
60 # Wait until everything is settled
61 sleep 15
62
63 return 0
64 done
65
66 return 1
67 }
68
69 main