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1 | #!/bin/bash |
2 | ############################################################################### | |
3 | # # | |
4 | # IPFire.org - A linux based firewall # | |
5 | # Copyright (C) 2012 IPFire Network Development Team # | |
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 | ||
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22 | NETWORK_DHCP_DUID_FILE="${NETWORK_CONFIG_DIR}/dhcp-duid" |
23 | ||
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24 | dhclient_start() { |
25 | local interface=${1} | |
26 | local proto=${2} | |
27 | ||
28 | assert isset interface | |
29 | assert device_exists ${interface} | |
30 | ||
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31 | local service=$(dhclient_proto2service ${proto} ${interface}) |
32 | service_start ${service} | |
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33 | } |
34 | ||
35 | dhclient_stop() { | |
36 | local interface=${1} | |
37 | local proto=${2} | |
38 | ||
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39 | local service=$(dhclient_proto2service ${proto} ${interface}) |
40 | service_stop ${service} | |
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41 | } |
42 | ||
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43 | dhclient_status() { |
44 | local interface=${1} | |
45 | local proto=${2} | |
46 | ||
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47 | local service=$(dhclient_proto2service ${proto} ${interface}) |
48 | service_status ${service} | |
8e3508ac MT |
49 | } |
50 | ||
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51 | dhclient_proto2service() { |
52 | local proto=${1} | |
53 | assert isset proto | |
54 | ||
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55 | local interface=${2} |
56 | assert isset interface | |
57 | ||
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58 | local service |
59 | ||
60 | case "${proto}" in | |
61 | ipv4) | |
1d08b9b3 | 62 | service="dhclient4@${interface}.service" |
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63 | ;; |
64 | ipv6) | |
1d08b9b3 | 65 | service="dhclient6@${interface}.service" |
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66 | ;; |
67 | *) | |
68 | return ${EXIT_ERROR} | |
69 | ;; | |
70 | esac | |
71 | ||
72 | assert isset service | |
73 | ||
74 | echo "${service}" | |
75 | return ${EXIT_OK} | |
76 | } | |
77 | ||
78 | dhclient_write_config() { | |
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79 | local interface="${1}" |
80 | shift | |
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81 | |
82 | assert isset interface | |
e9ea243e | 83 | |
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84 | local hostname |
85 | local vendor | |
86 | ||
87 | local config_file | |
88 | local leases_file | |
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89 | |
90 | while [ $# -gt 0 ]; do | |
91 | case "${1}" in | |
7ad5252c MT |
92 | --config-file=*) |
93 | config_file="$(cli_get_val "${1}")" | |
94 | ;; | |
e9ea243e | 95 | --hostname=*) |
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96 | hostname="$(cli_get_val "${1}")" |
97 | ;; | |
98 | --leases-file=*) | |
99 | leases_file="$(cli_get_val "${1}")" | |
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100 | ;; |
101 | --vendor=*) | |
7ad5252c | 102 | vendor="$(cli_get_val "${1}")" |
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103 | ;; |
104 | *) | |
105 | log WARNING $"Unknown configuration option passed: ${1}." | |
106 | ;; | |
107 | esac | |
108 | shift | |
109 | done | |
110 | ||
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111 | assert isset config_file |
112 | ||
113 | # Set default values | |
114 | if ! isset hostname; then | |
115 | hostname="$(config_hostname)" | |
116 | fi | |
117 | ||
118 | if ! isset vendor; then | |
119 | vendor="$(distro_get_pretty_name)" | |
120 | fi | |
121 | ||
e9ea243e | 122 | # Clear configuration file (if any). |
7ad5252c | 123 | mkdir -p $(dirname ${config_file}) 2>/dev/null |
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124 | |
125 | # Print the header. | |
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126 | config_header "dhclient daemon configuration file for ${interface}" \ |
127 | > "${config_file}" | |
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128 | |
129 | # Global options. | |
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130 | fappend "${config_file}" "send vendor-class-identifier \"${vendor}\";" |
131 | fappend "${config_file}" # empty line | |
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132 | |
133 | # Interface options. | |
134 | ( | |
135 | echo "interface \"${interface}\" {" | |
136 | ||
137 | if isset hostname; then | |
138 | echo " send host-name \"${hostname}\";" | |
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139 | |
140 | fi | |
141 | ||
e9ea243e | 142 | echo "}" |
7ad5252c MT |
143 | ) >> "${config_file}" |
144 | ||
145 | # Update leases file | |
146 | if isset leases_file; then | |
147 | __dhclient_update_leases_file "${leases_file}" || return $? | |
148 | fi | |
149 | ||
150 | return ${EXIT_OK} | |
151 | } | |
152 | ||
153 | dhclient_get_duid() { | |
154 | # If the DUID already exists, we do not do anything at all. | |
155 | if [ -s "${NETWORK_DHCP_DUID_FILE}" ]; then | |
156 | print "$(<${NETWORK_DHCP_DUID_FILE})" | |
157 | return ${EXIT_OK} | |
158 | fi | |
159 | ||
160 | # If no DUID exists, we will need to create a new one | |
161 | local duid="$(dhclient_generate_duid)" | |
162 | log DEBUG "Created new DHCP DUID: ${duid}" | |
163 | ||
164 | # Save the new DUID to file and return it | |
165 | print "${duid}" > "${NETWORK_DHCP_DUID_FILE}" | |
166 | ||
167 | print "${duid}" | |
168 | return ${EXIT_OK} | |
169 | } | |
170 | ||
171 | ||
172 | dhclient_generate_duid() { | |
173 | # Find lowest MAC/link-local address | |
174 | local address="$(ports_lowest_address)" | |
175 | ||
176 | # Use a random MAC address if no physical address could | |
177 | # be found. | |
178 | if ! isset address; then | |
179 | log WARNING "Could not determine the lowest MAC/link-local address" | |
180 | address="$(mac_generate)" | |
181 | fi | |
e9ea243e | 182 | |
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183 | log DEBUG "Using '${address}' to generate the DHCP DUID" |
184 | ||
185 | print "00030001${address//\:/}" | |
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186 | return ${EXIT_OK} |
187 | } | |
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188 | |
189 | __dhclient_update_leases_file() { | |
190 | local file="${1}" | |
191 | ||
192 | local duid="$(dhclient_get_duid)" | |
193 | ||
194 | if [ -e "${leases_file}" ]; then | |
195 | local old_duid="$(__dhclient_get_duid_from_leases_file "${leases_file}")" | |
196 | ||
197 | if [ "${duid}" = "${old_duid}" ]; then | |
198 | log DEBUG "DUID in leases file matches. Nothing to do" | |
199 | return ${EXIT_OK} | |
200 | fi | |
201 | fi | |
202 | ||
203 | # If the leases file does not exist, yet, or the | |
204 | # DUID in there is different, we will create/overwrite | |
205 | # the leases file with the correct DUID. | |
206 | ||
207 | ( | |
208 | printf "default-duid \"" | |
209 | ||
210 | local i=0 | |
211 | while [ ${i} -lt ${#duid} ]; do | |
212 | printf "\\\\\\\\" | |
213 | printf "x${duid:${i}:2}" | |
214 | i=$(( ${i} + 2 )) | |
215 | done | |
216 | ||
217 | print "\";" | |
218 | ) > "${leases_file}" | |
219 | ||
220 | return ${EXIT_OK} | |
221 | } | |
222 | ||
223 | __dhclient_get_duid_from_leases_file() { | |
224 | local file="${1}" | |
225 | ||
226 | # Do nothing if the leases file cannot be read | |
227 | [ -r "${file}" ] || return ${EXIT_OK} | |
228 | ||
229 | local line | |
230 | while read line; do | |
231 | if [[ ${line} =~ ^default-duid ]]; then | |
232 | line="${line/default-duid/}" | |
233 | line="${line//\\\\x/}" | |
234 | line="${line//;/}" | |
235 | ||
236 | line="$(strip "${line}")" | |
237 | unquote "${line}" | |
238 | return ${EXIT_OK} | |
239 | fi | |
240 | done < "${file}" | |
241 | ||
242 | return ${EXIT_ERROR} | |
243 | } |