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05c234a8 MT |
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 | ||
e617226b MT |
22 | IP_SUPPORTED_PROTOCOLS="${IP_SUPPORTED_PROTOCOLS} ipv4" |
23 | ||
05c234a8 MT |
24 | function ipv4_is_valid() { |
25 | local address=${1} | |
26 | ||
27 | assert isset address | |
28 | ||
38f61548 MT |
29 | # Cut the prefix if there is one given |
30 | local prefix=$(ip_get_prefix ${address}) | |
31 | address=$(ip_split_prefix ${address}) | |
32 | ||
33 | # If address is larger than 15 characters it cannot be an IPv4 address | |
34 | [ ${#address} -gt 15 ] && return ${EXIT_ERROR} | |
35 | ||
36 | # Check for a valid IPv4 prefix if provided | |
37 | if [ -n "${prefix}" ]; then | |
38 | if [ ${prefix} -lt 4 ] || [ ${prefix} -gt 30 ]; then | |
39 | return ${EXIT_ERROR} | |
40 | fi | |
41 | fi | |
05c234a8 MT |
42 | |
43 | local IFS="." | |
44 | local octet | |
45 | local count | |
46 | for octet in ${address}; do | |
47 | if [ ${octet} -ge 0 ] && [ ${octet} -le 255 ]; then | |
48 | count=$(( ${count} + 1 )) | |
49 | continue | |
50 | fi | |
51 | ||
52 | # If we get here the address was not valid | |
53 | break | |
54 | done | |
55 | ||
56 | if [ ${count} -eq 4 ]; then | |
57 | return ${EXIT_OK} | |
58 | fi | |
59 | ||
60 | return ${EXIT_ERROR} | |
61 | } | |
62 | ||
63 | function ipv4_detect_duplicate() { | |
64 | local device=${1} | |
65 | local address=${2} | |
66 | ||
67 | assert isset address | |
68 | assert isset device | |
69 | assert device_exists ${device} | |
70 | ||
71 | if ! arping -q -c 2 -w 3 -D -I ${device} ${address}; then | |
72 | log DEBUG "Detected duplicate address '${address}' on device '${device}'." | |
9eebfc55 | 73 | return ${EXIT_OK} |
05c234a8 MT |
74 | fi |
75 | ||
9eebfc55 | 76 | return ${EXIT_ERROR} |
05c234a8 MT |
77 | } |
78 | ||
79 | function ipv4_update_neighbours() { | |
80 | local device=${1} | |
81 | local address=${2} | |
82 | ||
83 | arping -q -A -c 1 -I ${device} ${address} | |
84 | ( sleep 2; arping -q -U -c 1 -I ${device} ${address} ) >/dev/null 2>&1 </dev/null & | |
85 | } |