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1 | #!/bin/bash |
2 | ############################################################################### | |
3 | # # | |
4 | # IPFire.org - A linux based firewall # | |
5 | # Copyright (C) 2010 Michael Tremer & Christian Schmidt # | |
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 ipv4_split_prefix() { | |
23 | ip_split_prefix $@ | |
24 | } | |
25 | ||
26 | function ipv4_is_valid() { | |
27 | local address=${1} | |
28 | ||
29 | assert isset address | |
30 | ||
31 | # Cut the /24 if there is one given | |
32 | address=$(ipv4_split_prefix ${address}) | |
33 | ||
34 | local IFS="." | |
35 | local octet | |
36 | local count | |
37 | for octet in ${address}; do | |
38 | if [ ${octet} -ge 0 ] && [ ${octet} -le 255 ]; then | |
39 | count=$(( ${count} + 1 )) | |
40 | continue | |
41 | fi | |
42 | ||
43 | # If we get here the address was not valid | |
44 | break | |
45 | done | |
46 | ||
47 | if [ ${count} -eq 4 ]; then | |
48 | return ${EXIT_OK} | |
49 | fi | |
50 | ||
51 | return ${EXIT_ERROR} | |
52 | } | |
53 | ||
54 | function ipv4_detect_duplicate() { | |
55 | local device=${1} | |
56 | local address=${2} | |
57 | ||
58 | assert isset address | |
59 | assert isset device | |
60 | assert device_exists ${device} | |
61 | ||
62 | if ! arping -q -c 2 -w 3 -D -I ${device} ${address}; then | |
63 | log DEBUG "Detected duplicate address '${address}' on device '${device}'." | |
64 | return ${EXIT_ERROR} | |
65 | fi | |
66 | ||
67 | return ${EXIT_OK} | |
68 | } | |
69 | ||
70 | function ipv4_update_neighbours() { | |
71 | local device=${1} | |
72 | local address=${2} | |
73 | ||
74 | arping -q -A -c 1 -I ${device} ${address} | |
75 | ( sleep 2; arping -q -U -c 1 -I ${device} ${address} ) >/dev/null 2>&1 </dev/null & | |
76 | } |