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d0e5f71f ML |
1 | #!/bin/sh |
2 | # Begin $rc_base/init.d/unbound | |
3 | ||
4 | # Description : Unbound DNS resolver boot script for IPfire | |
5 | # Author : Marcel Lorenz <marcel.lorenz@ipfire.org> | |
d0e5f71f ML |
6 | |
7 | . /etc/sysconfig/rc | |
8 | . ${rc_functions} | |
9 | ||
b29c97b1 AF |
10 | TEST_DOMAIN="ipfire.org" |
11 | ||
12 | # This domain will never validate | |
13 | TEST_DOMAIN_FAIL="dnssec-failed.org" | |
14 | ||
b8f5eda8 | 15 | USE_FORWARDERS=1 |
d0e5f71f | 16 | |
36792be6 MT |
17 | # Cache any local zones for 60 seconds |
18 | LOCAL_TTL=60 | |
19 | ||
b8f5eda8 MT |
20 | # Load optional configuration |
21 | [ -e "/etc/sysconfig/unbound" ] && . /etc/sysconfig/unbound | |
d0e5f71f ML |
22 | |
23 | function cidr() { | |
24 | local cidr nbits IFS; | |
25 | IFS=. read -r i1 i2 i3 i4 <<< ${1} | |
26 | IFS=. read -r m1 m2 m3 m4 <<< ${2} | |
27 | cidr=$(printf "%d.%d.%d.%d\n" "$((i1 & m1))" "$((i2 & m2))" "$((i3 & m3))" "$((i4 & m4))") | |
28 | nbits=0 | |
29 | IFS=. | |
30 | for dec in $2 ; do | |
31 | case $dec in | |
32 | 255) let nbits+=8;; | |
33 | 254) let nbits+=7;; | |
34 | 252) let nbits+=6;; | |
35 | 248) let nbits+=5;; | |
36 | 240) let nbits+=4;; | |
37 | 224) let nbits+=3;; | |
38 | 192) let nbits+=2;; | |
39 | 128) let nbits+=1;; | |
40 | 0);; | |
41 | *) echo "Error: $dec is not recognised"; exit 1 | |
42 | esac | |
43 | done | |
44 | echo "${cidr}/${nbits}" | |
45 | } | |
46 | ||
b8f5eda8 MT |
47 | read_name_servers() { |
48 | local i | |
49 | for i in 1 2; do | |
50 | echo "$(</var/ipfire/red/dns${i})" | |
51 | done | xargs echo | |
52 | } | |
53 | ||
54 | config_header() { | |
55 | echo "# This file is automatically generated and any changes" | |
56 | echo "# will be overwritten. DO NOT EDIT!" | |
57 | echo | |
58 | } | |
59 | ||
60 | update_forwarders() { | |
b29c97b1 AF |
61 | if [ "${USE_FORWARDERS}" = "1" -a -e "/var/ipfire/red/active" ]; then |
62 | local forwarders | |
63 | local broken_forwarders | |
64 | ||
65 | local ns | |
66 | for ns in $(read_name_servers); do | |
67 | test_name_server ${ns} &>/dev/null | |
68 | case "$?" in | |
69 | # Only use DNSSEC-validating or DNSSEC-aware name servers | |
70 | 0|2) | |
71 | forwarders="${forwarders} ${ns}" | |
72 | ;; | |
73 | *) | |
74 | broken_forwarders="${broken_forwarders} ${ns}" | |
75 | ;; | |
76 | esac | |
77 | done | |
78 | ||
79 | # Show warning for any broken upstream name servers | |
80 | if [ -n "${broken_forwarders}" ]; then | |
81 | boot_mesg "Ignoring broken upstream name server(s): ${broken_forwarders:1}" ${WARNING} | |
82 | echo_warning | |
83 | fi | |
b8f5eda8 | 84 | |
b29c97b1 AF |
85 | if [ -n "${broken_forwarders}" -a -z "${forwarders}" ]; then |
86 | boot_mesg "Falling back to recursor mode" ${WARNING} | |
87 | echo_warning | |
b8f5eda8 | 88 | |
b29c97b1 AF |
89 | elif [ -n "${forwarders}" ]; then |
90 | boot_mesg "Configuring upstream name server(s): ${forwarders:1}" ${INFO} | |
91 | echo_ok | |
b8f5eda8 | 92 | |
e24d6112 | 93 | echo "${forwarders}" > /var/ipfire/red/dns |
b29c97b1 AF |
94 | unbound-control -q forward ${forwarders} |
95 | return 0 | |
96 | fi | |
b8f5eda8 | 97 | fi |
b29c97b1 AF |
98 | |
99 | # If forwarders cannot be used we run in recursor mode | |
e24d6112 | 100 | echo "local recursor" > /var/ipfire/red/dns |
b29c97b1 | 101 | unbound-control -q forward off |
b8f5eda8 MT |
102 | } |
103 | ||
36792be6 MT |
104 | update_hosts() { |
105 | local enabled address hostname domainname | |
106 | ||
107 | while IFS="," read -r enabled address hostname domainname; do | |
108 | [ "${enabled}" = "on" ] || continue | |
109 | ||
110 | # Build FQDN | |
111 | local fqdn="${hostname}.${domainname}" | |
112 | ||
113 | unbound-control -q local_data "${fqdn} ${LOCAL_TTL} IN A ${address}" | |
114 | done < /var/ipfire/main/hosts | |
115 | } | |
116 | ||
b8f5eda8 MT |
117 | write_interfaces_conf() { |
118 | ( | |
119 | config_header | |
120 | ||
121 | if [ -n "${GREEN_ADDRESS}" ]; then | |
122 | echo "# GREEN" | |
123 | echo "interface: ${GREEN_ADDRESS}" | |
124 | echo "access-control: $(cidr ${GREEN_NETADDRESS} ${GREEN_NETMASK}) allow" | |
125 | fi | |
126 | ||
127 | if [ -n "${BLUE_ADDRESS}" ]; then | |
128 | echo "# BLUE" | |
129 | echo "interface: ${BLUE_ADDRESS}" | |
130 | echo "access-control: $(cidr ${BLUE_NETADDRESS} ${BLUE_NETMASK}) allow" | |
131 | fi | |
132 | ) > /etc/unbound/interfaces.conf | |
133 | } | |
134 | ||
135 | write_forward_conf() { | |
136 | ( | |
137 | config_header | |
138 | ||
139 | local enabled zone server remark | |
140 | while IFS="," read -r enabled zone server remark; do | |
141 | # Line must be enabled. | |
142 | [ "${enabled}" = "on" ] || continue | |
143 | ||
144 | echo "forward-zone:" | |
145 | echo " name: ${zone}" | |
146 | echo " forward-addr: ${server}" | |
147 | echo | |
148 | done < /var/ipfire/dnsforward/config | |
149 | ) > /etc/unbound/forward.conf | |
150 | } | |
151 | ||
b658a451 MT |
152 | write_tuning_conf() { |
153 | # https://www.unbound.net/documentation/howto_optimise.html | |
154 | ||
155 | # Determine number of online processors | |
156 | local processors=$(getconf _NPROCESSORS_ONLN) | |
157 | ||
158 | # Determine number of slabs | |
159 | local slabs=1 | |
160 | while [ ${slabs} -lt ${processors} ]; do | |
161 | slabs=$(( ${slabs} * 2 )) | |
162 | done | |
163 | ||
164 | # Determine amount of system memory | |
165 | local mem=$(get_memory_amount) | |
166 | ||
167 | # In the worst case scenario, unbound can use double the | |
168 | # amount of memory allocated to a cache due to malloc overhead | |
169 | ||
170 | # Large systems with more than 2GB of RAM | |
171 | if [ ${mem} -ge 2048 ]; then | |
172 | mem=128 | |
173 | ||
174 | # Small systems with less than 256MB of RAM | |
175 | elif [ ${mem} -le 256 ]; then | |
176 | mem=8 | |
177 | ||
178 | # Everything else | |
179 | else | |
180 | mem=32 | |
181 | fi | |
182 | ||
183 | ( | |
184 | config_header | |
185 | ||
186 | # We run one thread per processor | |
187 | echo "num-threads: ${processors}" | |
188 | ||
189 | # Adjust number of slabs | |
190 | echo "infra-cache-slabs: ${slabs}" | |
191 | echo "key-cache-slabs: ${slabs}" | |
192 | echo "msg-cache-slabs: ${slabs}" | |
193 | echo "rrset-cache-slabs: ${slabs}" | |
194 | ||
195 | # Slice up the cache | |
196 | echo "rrset-cache-size: $(( ${mem} / 2 ))m" | |
197 | echo "msg-cache-size: $(( ${mem} / 4 ))m" | |
198 | echo "key-cache-size: $(( ${mem} / 4 ))m" | |
199 | ) > /etc/unbound/tuning.conf | |
200 | } | |
201 | ||
202 | get_memory_amount() { | |
203 | local key val unit | |
204 | ||
205 | while read -r key val unit; do | |
206 | case "${key}" in | |
207 | MemTotal:*) | |
208 | # Convert to MB | |
209 | echo "$(( ${val} / 1024 ))" | |
210 | break | |
211 | ;; | |
212 | esac | |
213 | done < /proc/meminfo | |
214 | } | |
b8f5eda8 | 215 | |
b29c97b1 AF |
216 | test_name_server() { |
217 | local ns=${1} | |
218 | ||
219 | # Return codes: | |
220 | # 0 DNSSEC validating | |
221 | # 1 Error: unreachable, etc. | |
222 | # 2 DNSSEC aware | |
223 | # 3 NOT DNSSEC-aware | |
224 | ||
225 | # Exit when the server is not reachable | |
226 | ns_is_online ${ns} || return 1 | |
227 | ||
228 | # Return 0 if validating | |
229 | ns_is_validating ${ns} && return 0 | |
230 | ||
231 | local errors | |
232 | for rr in DNSKEY DS RRSIG; do | |
233 | if ! ns_forwards_${rr} ${ns}; then | |
234 | errors="${errors} ${rr}" | |
235 | fi | |
236 | done | |
237 | ||
238 | if [ -n "${errors}" ]; then | |
239 | echo >&2 "Unable to retrieve the following resource records from ${ns}: ${errors:1}" | |
240 | return 3 | |
241 | fi | |
242 | ||
243 | # Is DNSSEC-aware | |
244 | return 2 | |
245 | } | |
246 | ||
247 | # Sends an A query to the nameserver w/o DNSSEC | |
248 | ns_is_online() { | |
249 | local ns=${1} | |
250 | ||
251 | dig @${ns} +nodnssec A ${TEST_DOMAIN} >/dev/null | |
252 | } | |
253 | ||
254 | # Resolving ${TEST_DOMAIN_FAIL} will fail if the nameserver is validating | |
255 | ns_is_validating() { | |
256 | local ns=${1} | |
257 | ||
258 | dig @${ns} A ${TEST_DOMAIN_FAIL} | grep -q SERVFAIL | |
259 | } | |
260 | ||
261 | # Checks if we can retrieve the DNSKEY for this domain. | |
262 | # dig will print the SOA if nothing was found | |
263 | ns_forwards_DNSKEY() { | |
264 | local ns=${1} | |
265 | ||
266 | dig @${ns} DNSKEY ${TEST_DOMAIN} | grep -qv SOA | |
267 | } | |
268 | ||
269 | ns_forwards_DS() { | |
270 | local ns=${1} | |
271 | ||
272 | dig @${ns} DS ${TEST_DOMAIN} | grep -qv SOA | |
273 | } | |
274 | ||
275 | ns_forwards_RRSIG() { | |
276 | local ns=${1} | |
277 | ||
278 | dig @${ns} +dnssec A ${TEST_DOMAIN} | grep -q RRSIG | |
279 | } | |
280 | ||
281 | ns_supports_tcp() { | |
282 | local ns=${1} | |
283 | ||
284 | dig @${ns} +tcp A ${TEST_DOMAIN} >/dev/null || return 1 | |
285 | } | |
286 | ||
d0e5f71f ML |
287 | case "$1" in |
288 | start) | |
80bc6022 MT |
289 | # Print a nicer messagen when unbound is already running |
290 | if pidofproc -s unbound; then | |
291 | statusproc /usr/sbin/unbound | |
292 | exit 0 | |
293 | fi | |
294 | ||
b8f5eda8 | 295 | eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings) |
d0e5f71f | 296 | |
b8f5eda8 MT |
297 | # Create control keys at first run |
298 | if [ ! -r "/etc/unbound/unbound_control.key" ]; then | |
299 | unbound-control-setup -d /etc/unbound &>/dev/null | |
300 | fi | |
301 | ||
302 | # Update configuration files | |
b658a451 | 303 | write_tuning_conf |
b8f5eda8 MT |
304 | write_interfaces_conf |
305 | write_forward_conf | |
306 | ||
307 | boot_mesg "Starting Unbound DNS Proxy..." | |
308 | loadproc /usr/sbin/unbound || exit $? | |
309 | ||
310 | # Update any known forwarding name servers | |
311 | update_forwarders | |
36792be6 MT |
312 | |
313 | # Update hosts | |
314 | update_hosts | |
b8f5eda8 | 315 | ;; |
d0e5f71f ML |
316 | |
317 | stop) | |
b8f5eda8 MT |
318 | boot_mesg "Stopping Unbound DNS Proxy..." |
319 | killproc /usr/sbin/unbound | |
320 | ;; | |
d0e5f71f ML |
321 | |
322 | restart) | |
b8f5eda8 MT |
323 | $0 stop |
324 | sleep 1 | |
325 | $0 start | |
326 | ;; | |
d0e5f71f ML |
327 | |
328 | status) | |
b8f5eda8 | 329 | statusproc /usr/sbin/unbound |
b8f5eda8 MT |
330 | ;; |
331 | ||
332 | update-forwarders) | |
333 | update_forwarders | |
334 | ;; | |
d0e5f71f | 335 | |
b29c97b1 AF |
336 | test-name-server) |
337 | ns=${2} | |
338 | ||
339 | test_name_server ${ns} | |
340 | ret=${?} | |
341 | ||
342 | case "${ret}" in | |
343 | 0) | |
344 | echo "${ns} is validating" | |
345 | ;; | |
346 | 2) | |
347 | echo "${ns} is DNSSEC-aware" | |
348 | ;; | |
349 | 3) | |
350 | echo "${ns} is NOT DNSSEC-aware" | |
351 | ;; | |
352 | *) | |
353 | echo "Test failed for an unknown reason" | |
354 | ;; | |
355 | esac | |
356 | ||
357 | if ns_supports_tcp ${ns}; then | |
358 | echo "${ns} supports TCP fallback" | |
359 | else | |
360 | echo "${ns} does not support TCP fallback" | |
361 | fi | |
362 | ||
363 | exit ${ret} | |
364 | ;; | |
365 | ||
d0e5f71f | 366 | *) |
b29c97b1 | 367 | echo "Usage: $0 {start|stop|restart|status|update-forwarders|test-name-server}" |
b8f5eda8 MT |
368 | exit 1 |
369 | ;; | |
d0e5f71f ML |
370 | esac |
371 | ||
372 | # End $rc_base/init.d/unbound |