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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
8fcf1d61 | 2 | |
5ae0fb7f YW |
3 | #include <netinet/in.h> |
4 | #include <linux/if_arp.h> | |
5 | #include <linux/if.h> | |
6 | ||
8fcf1d61 YW |
7 | #include "sd-dhcp-server.h" |
8 | ||
dd1d3060 MAL |
9 | #include "fd-util.h" |
10 | #include "fileio.h" | |
093e3533 | 11 | #include "networkd-address.h" |
a95e9306 | 12 | #include "networkd-dhcp-server-bus.h" |
c517a49b | 13 | #include "networkd-dhcp-server-static-lease.h" |
14 | #include "networkd-dhcp-server.h" | |
8fcf1d61 YW |
15 | #include "networkd-link.h" |
16 | #include "networkd-manager.h" | |
17 | #include "networkd-network.h" | |
564ca984 | 18 | #include "parse-util.h" |
dd1d3060 | 19 | #include "socket-netlink.h" |
564ca984 SS |
20 | #include "string-table.h" |
21 | #include "string-util.h" | |
dd1d3060 | 22 | #include "strv.h" |
8fcf1d61 | 23 | |
5ae0fb7f YW |
24 | static bool link_dhcp4_server_enabled(Link *link) { |
25 | assert(link); | |
26 | ||
27 | if (link->flags & IFF_LOOPBACK) | |
28 | return false; | |
29 | ||
30 | if (!link->network) | |
31 | return false; | |
32 | ||
5ae0fb7f YW |
33 | if (link->iftype == ARPHRD_CAN) |
34 | return false; | |
35 | ||
36 | return link->network->dhcp_server; | |
37 | } | |
38 | ||
0017ba31 YW |
39 | void network_adjust_dhcp_server(Network *network) { |
40 | assert(network); | |
41 | ||
42 | if (!network->dhcp_server) | |
43 | return; | |
44 | ||
45 | if (network->bond) { | |
46 | log_warning("%s: DHCPServer= is enabled for bond slave. Disabling DHCP server.", | |
47 | network->filename); | |
48 | network->dhcp_server = false; | |
49 | return; | |
50 | } | |
51 | ||
52 | if (!in4_addr_is_set(&network->dhcp_server_address)) { | |
53 | Address *address; | |
54 | bool have = false; | |
55 | ||
56 | ORDERED_HASHMAP_FOREACH(address, network->addresses_by_section) { | |
57 | if (section_is_invalid(address->section)) | |
58 | continue; | |
59 | if (address->family == AF_INET && | |
60 | !in4_addr_is_localhost(&address->in_addr.in) && | |
61 | in4_addr_is_null(&address->in_addr_peer.in)) { | |
62 | have = true; | |
63 | break; | |
64 | } | |
65 | } | |
66 | if (!have) { | |
67 | log_warning("%s: DHCPServer= is enabled, but no static address configured. " | |
68 | "Disabling DHCP server.", | |
69 | network->filename); | |
70 | network->dhcp_server = false; | |
71 | return; | |
72 | } | |
73 | } | |
74 | } | |
75 | ||
76 | static int link_find_dhcp_server_address(Link *link, Address **ret) { | |
8fcf1d61 YW |
77 | Address *address; |
78 | ||
79 | assert(link); | |
80 | assert(link->network); | |
81 | ||
0017ba31 YW |
82 | /* If ServerAddress= is specified, then use the address. */ |
83 | if (in4_addr_is_set(&link->network->dhcp_server_address)) | |
84 | return link_get_ipv4_address(link, &link->network->dhcp_server_address, | |
85 | link->network->dhcp_server_address_prefixlen, ret); | |
8fcf1d61 | 86 | |
0017ba31 YW |
87 | /* If not, then select one from static addresses. */ |
88 | SET_FOREACH(address, link->static_addresses) | |
89 | if (address->family == AF_INET && | |
90 | !in4_addr_is_localhost(&address->in_addr.in) && | |
91 | in4_addr_is_null(&address->in_addr_peer.in)) { | |
92 | *ret = address; | |
93 | return 0; | |
94 | } | |
8fcf1d61 | 95 | |
0017ba31 | 96 | return -ENOENT; |
8fcf1d61 YW |
97 | } |
98 | ||
2a71d57f LP |
99 | static int link_push_uplink_to_dhcp_server( |
100 | Link *link, | |
2324fd3a | 101 | sd_dhcp_lease_server_type_t what, |
2a71d57f LP |
102 | sd_dhcp_server *s) { |
103 | ||
8fcf1d61 | 104 | _cleanup_free_ struct in_addr *addresses = NULL; |
2a71d57f | 105 | bool use_dhcp_lease_data = true; |
319a4f4b | 106 | size_t n_addresses = 0; |
8fcf1d61 | 107 | |
2a71d57f | 108 | assert(link); |
8fcf1d61 | 109 | |
2a71d57f LP |
110 | if (!link->network) |
111 | return 0; | |
112 | assert(link->network); | |
8fcf1d61 | 113 | |
2a71d57f | 114 | log_link_debug(link, "Copying %s from link", dhcp_lease_server_type_to_string(what)); |
8fcf1d61 | 115 | |
2a71d57f | 116 | switch (what) { |
8fcf1d61 | 117 | |
2a71d57f LP |
118 | case SD_DHCP_LEASE_DNS: |
119 | /* For DNS we have a special case. We the data configured explicitly locally along with the | |
120 | * data from the DHCP lease. */ | |
8fcf1d61 | 121 | |
2a71d57f LP |
122 | for (unsigned i = 0; i < link->network->n_dns; i++) { |
123 | struct in_addr ia; | |
8fcf1d61 | 124 | |
2a71d57f | 125 | /* Only look for IPv4 addresses */ |
e77bd3fd | 126 | if (link->network->dns[i]->family != AF_INET) |
2a71d57f | 127 | continue; |
8fcf1d61 | 128 | |
e77bd3fd | 129 | ia = link->network->dns[i]->address.in; |
2a71d57f LP |
130 | |
131 | /* Never propagate obviously borked data */ | |
132 | if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia)) | |
133 | continue; | |
134 | ||
319a4f4b | 135 | if (!GREEDY_REALLOC(addresses, n_addresses + 1)) |
8fcf1d61 YW |
136 | return log_oom(); |
137 | ||
2a71d57f | 138 | addresses[n_addresses++] = ia; |
8fcf1d61 | 139 | } |
8fcf1d61 | 140 | |
2a71d57f LP |
141 | use_dhcp_lease_data = link->network->dhcp_use_dns; |
142 | break; | |
8fcf1d61 | 143 | |
2a71d57f LP |
144 | case SD_DHCP_LEASE_NTP: { |
145 | char **i; | |
8fcf1d61 | 146 | |
2a71d57f LP |
147 | /* For NTP things are similar, but for NTP hostnames can be configured too, which we cannot |
148 | * propagate via DHCP. Hence let's only propagate those which are IP addresses. */ | |
284e8fd0 | 149 | |
2a71d57f LP |
150 | STRV_FOREACH(i, link->network->ntp) { |
151 | union in_addr_union ia; | |
284e8fd0 | 152 | |
2a71d57f LP |
153 | if (in_addr_from_string(AF_INET, *i, &ia) < 0) |
154 | continue; | |
284e8fd0 | 155 | |
2a71d57f LP |
156 | /* Never propagate obviously borked data */ |
157 | if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in)) | |
158 | continue; | |
284e8fd0 | 159 | |
319a4f4b | 160 | if (!GREEDY_REALLOC(addresses, n_addresses + 1)) |
2a71d57f | 161 | return log_oom(); |
284e8fd0 | 162 | |
2a71d57f LP |
163 | addresses[n_addresses++] = ia.in; |
164 | } | |
284e8fd0 | 165 | |
2a71d57f | 166 | use_dhcp_lease_data = link->network->dhcp_use_ntp; |
24e6f458 | 167 | break; |
2a71d57f | 168 | } |
284e8fd0 | 169 | |
ddb82ec2 | 170 | case SD_DHCP_LEASE_SIP: |
2a71d57f LP |
171 | |
172 | /* For SIP we don't allow explicit, local configuration, but there's control whether to use the data */ | |
173 | use_dhcp_lease_data = link->network->dhcp_use_sip; | |
24e6f458 | 174 | break; |
284e8fd0 | 175 | |
2a71d57f LP |
176 | case SD_DHCP_LEASE_POP3: |
177 | case SD_DHCP_LEASE_SMTP: | |
ddb82ec2 | 178 | case SD_DHCP_LEASE_LPR: |
2a71d57f LP |
179 | /* For the other server types we currently do not allow local configuration of server data, |
180 | * since there are typically no local consumers of the data. */ | |
c4e585a3 | 181 | break; |
d361b373 | 182 | |
24e6f458 | 183 | default: |
2a71d57f | 184 | assert_not_reached("Unexpected server type"); |
f6269fe7 SS |
185 | } |
186 | ||
2a71d57f | 187 | if (use_dhcp_lease_data && link->dhcp_lease) { |
24e6f458 | 188 | const struct in_addr *da; |
f6269fe7 | 189 | |
a2706075 | 190 | int n = sd_dhcp_lease_get_servers(link->dhcp_lease, what, &da); |
f6269fe7 | 191 | if (n > 0) { |
319a4f4b | 192 | if (!GREEDY_REALLOC(addresses, n_addresses + n)) |
f6269fe7 SS |
193 | return log_oom(); |
194 | ||
2a71d57f LP |
195 | for (int j = 0; j < n; j++) |
196 | if (in4_addr_is_non_local(&da[j])) | |
197 | addresses[n_addresses++] = da[j]; | |
f6269fe7 SS |
198 | } |
199 | } | |
200 | ||
201 | if (n_addresses <= 0) | |
202 | return 0; | |
203 | ||
24e6f458 | 204 | return sd_dhcp_server_set_servers(s, what, addresses, n_addresses); |
299d578f SS |
205 | } |
206 | ||
319a4f4b LP |
207 | static int dhcp4_server_parse_dns_server_string_and_warn( |
208 | const char *string, | |
209 | struct in_addr **addresses, | |
210 | size_t *n_addresses) { | |
211 | ||
dd1d3060 MAL |
212 | for (;;) { |
213 | _cleanup_free_ char *word = NULL, *server_name = NULL; | |
214 | union in_addr_union address; | |
215 | int family, r, ifindex = 0; | |
216 | ||
217 | r = extract_first_word(&string, &word, NULL, 0); | |
218 | if (r < 0) | |
219 | return r; | |
220 | if (r == 0) | |
221 | break; | |
222 | ||
223 | r = in_addr_ifindex_name_from_string_auto(word, &family, &address, &ifindex, &server_name); | |
224 | if (r < 0) { | |
225 | log_warning_errno(r, "Failed to parse DNS server address '%s', ignoring: %m", word); | |
226 | continue; | |
227 | } | |
228 | ||
229 | /* Only look for IPv4 addresses */ | |
230 | if (family != AF_INET) | |
231 | continue; | |
232 | ||
233 | /* Never propagate obviously borked data */ | |
234 | if (in4_addr_is_null(&address.in) || in4_addr_is_localhost(&address.in)) | |
235 | continue; | |
236 | ||
319a4f4b | 237 | if (!GREEDY_REALLOC(*addresses, *n_addresses + 1)) |
dd1d3060 MAL |
238 | return log_oom(); |
239 | ||
240 | (*addresses)[(*n_addresses)++] = address.in; | |
241 | } | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
246 | static int dhcp4_server_set_dns_from_resolve_conf(Link *link) { | |
247 | _cleanup_free_ struct in_addr *addresses = NULL; | |
dd1d3060 | 248 | _cleanup_fclose_ FILE *f = NULL; |
319a4f4b | 249 | size_t n_addresses = 0; |
dd1d3060 MAL |
250 | int n = 0, r; |
251 | ||
252 | f = fopen(PRIVATE_UPLINK_RESOLV_CONF, "re"); | |
253 | if (!f) { | |
254 | if (errno == ENOENT) | |
255 | return 0; | |
256 | ||
257 | return log_warning_errno(errno, "Failed to open " PRIVATE_UPLINK_RESOLV_CONF ": %m"); | |
258 | } | |
259 | ||
260 | for (;;) { | |
261 | _cleanup_free_ char *line = NULL; | |
262 | const char *a; | |
263 | char *l; | |
264 | ||
265 | r = read_line(f, LONG_LINE_MAX, &line); | |
266 | if (r < 0) | |
267 | return log_error_errno(r, "Failed to read " PRIVATE_UPLINK_RESOLV_CONF ": %m"); | |
268 | if (r == 0) | |
269 | break; | |
270 | ||
271 | n++; | |
272 | ||
273 | l = strstrip(line); | |
274 | if (IN_SET(*l, '#', ';', 0)) | |
275 | continue; | |
276 | ||
277 | a = first_word(l, "nameserver"); | |
278 | if (!a) | |
279 | continue; | |
280 | ||
319a4f4b | 281 | r = dhcp4_server_parse_dns_server_string_and_warn(a, &addresses, &n_addresses); |
dd1d3060 MAL |
282 | if (r < 0) |
283 | log_warning_errno(r, "Failed to parse DNS server address '%s', ignoring.", a); | |
284 | } | |
285 | ||
286 | if (n_addresses <= 0) | |
287 | return 0; | |
288 | ||
289 | return sd_dhcp_server_set_dns(link->dhcp_server, addresses, n_addresses); | |
290 | } | |
291 | ||
8fcf1d61 | 292 | int dhcp4_server_configure(Link *link) { |
8fcf1d61 | 293 | bool acquired_uplink = false; |
461dbb2f | 294 | sd_dhcp_option *p; |
c517a49b | 295 | DHCPStaticLease *static_lease; |
564ca984 SS |
296 | Link *uplink = NULL; |
297 | Address *address; | |
11c38d3e | 298 | bool bind_to_interface; |
8fcf1d61 YW |
299 | int r; |
300 | ||
5ae0fb7f YW |
301 | assert(link); |
302 | ||
303 | if (!link_dhcp4_server_enabled(link)) | |
304 | return 0; | |
305 | ||
306 | if (!(link->flags & IFF_UP)) | |
307 | return 0; | |
308 | ||
309 | if (!link->dhcp_server) { | |
310 | r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex); | |
311 | if (r < 0) | |
312 | return r; | |
313 | ||
314 | r = sd_dhcp_server_attach_event(link->dhcp_server, link->manager->event, 0); | |
315 | if (r < 0) | |
316 | return r; | |
317 | } | |
318 | ||
a95e9306 LK |
319 | r = sd_dhcp_server_set_callback(link->dhcp_server, dhcp_server_callback, link); |
320 | if (r < 0) | |
321 | return log_link_warning_errno(link, r, "Failed to set callback for DHCPv4 server instance: %m"); | |
322 | ||
0017ba31 YW |
323 | r = link_find_dhcp_server_address(link, &address); |
324 | if (r < 0) | |
325 | return log_link_error_errno(link, r, "Failed to find suitable address for DHCPv4 server instance: %m"); | |
8fcf1d61 YW |
326 | |
327 | /* use the server address' subnet as the pool */ | |
328 | r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen, | |
329 | link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size); | |
330 | if (r < 0) | |
c00c3b64 | 331 | return log_link_error_errno(link, r, "Failed to configure address pool for DHCPv4 server instance: %m"); |
8fcf1d61 YW |
332 | |
333 | /* TODO: | |
334 | r = sd_dhcp_server_set_router(link->dhcp_server, &main_address->in_addr.in); | |
335 | if (r < 0) | |
336 | return r; | |
337 | */ | |
338 | ||
339 | if (link->network->dhcp_server_max_lease_time_usec > 0) { | |
340 | r = sd_dhcp_server_set_max_lease_time(link->dhcp_server, | |
341 | DIV_ROUND_UP(link->network->dhcp_server_max_lease_time_usec, USEC_PER_SEC)); | |
342 | if (r < 0) | |
c00c3b64 | 343 | return log_link_error_errno(link, r, "Failed to set maximum lease time for DHCPv4 server instance: %m"); |
8fcf1d61 YW |
344 | } |
345 | ||
346 | if (link->network->dhcp_server_default_lease_time_usec > 0) { | |
347 | r = sd_dhcp_server_set_default_lease_time(link->dhcp_server, | |
348 | DIV_ROUND_UP(link->network->dhcp_server_default_lease_time_usec, USEC_PER_SEC)); | |
349 | if (r < 0) | |
c00c3b64 | 350 | return log_link_error_errno(link, r, "Failed to set default lease time for DHCPv4 server instance: %m"); |
8fcf1d61 YW |
351 | } |
352 | ||
2324fd3a | 353 | for (sd_dhcp_lease_server_type_t type = 0; type < _SD_DHCP_LEASE_SERVER_TYPE_MAX; type ++) { |
2a71d57f LP |
354 | |
355 | if (!link->network->dhcp_server_emit[type].emit) | |
356 | continue; | |
357 | ||
358 | if (link->network->dhcp_server_emit[type].n_addresses > 0) | |
359 | /* Explicitly specified servers to emit */ | |
360 | r = sd_dhcp_server_set_servers( | |
361 | link->dhcp_server, | |
362 | type, | |
363 | link->network->dhcp_server_emit[type].addresses, | |
364 | link->network->dhcp_server_emit[type].n_addresses); | |
365 | else { | |
366 | /* Emission is requested, but nothing explicitly configured. Let's find a suitable upling */ | |
367 | if (!acquired_uplink) { | |
368 | uplink = manager_find_uplink(link->manager, link); | |
369 | acquired_uplink = true; | |
370 | } | |
371 | ||
372 | if (uplink && uplink->network) | |
373 | r = link_push_uplink_to_dhcp_server(uplink, type, link->dhcp_server); | |
374 | else if (type == SD_DHCP_LEASE_DNS) | |
375 | r = dhcp4_server_set_dns_from_resolve_conf(link); | |
24e6f458 | 376 | else { |
2a71d57f LP |
377 | log_link_debug(link, |
378 | "Not emitting %s on link, couldn't find suitable uplink.", | |
379 | dhcp_lease_server_type_to_string(type)); | |
380 | continue; | |
24e6f458 | 381 | } |
299d578f | 382 | } |
284e8fd0 | 383 | |
2a71d57f LP |
384 | if (r < 0) |
385 | log_link_warning_errno(link, r, | |
386 | "Failed to set %s for DHCP server, ignoring: %m", | |
387 | dhcp_lease_server_type_to_string(type)); | |
388 | } | |
389 | ||
8fcf1d61 YW |
390 | r = sd_dhcp_server_set_emit_router(link->dhcp_server, link->network->dhcp_server_emit_router); |
391 | if (r < 0) | |
a0fa3ef7 | 392 | return log_link_error_errno(link, r, "Failed to set router emission for DHCP server: %m"); |
8fcf1d61 | 393 | |
c95df587 YA |
394 | r = sd_dhcp_server_set_relay_target(link->dhcp_server, &link->network->dhcp_server_relay_target); |
395 | if (r < 0) | |
396 | return log_link_error_errno(link, r, "Failed to set relay target for DHCP server: %m"); | |
397 | ||
11c38d3e YA |
398 | bind_to_interface = sd_dhcp_server_is_in_relay_mode(link->dhcp_server) ? false : link->network->dhcp_server_bind_to_interface; |
399 | r = sd_dhcp_server_set_bind_to_interface(link->dhcp_server, bind_to_interface); | |
400 | if (r < 0) | |
401 | return log_link_error_errno(link, r, "Failed to set interface binding for DHCP server: %m"); | |
402 | ||
403 | r = sd_dhcp_server_set_relay_agent_information(link->dhcp_server, link->network->dhcp_server_relay_agent_circuit_id, link->network->dhcp_server_relay_agent_remote_id); | |
404 | if (r < 0) | |
405 | return log_link_error_errno(link, r, "Failed to set agent circuit/remote id for DHCP server: %m"); | |
406 | ||
8fcf1d61 YW |
407 | if (link->network->dhcp_server_emit_timezone) { |
408 | _cleanup_free_ char *buffer = NULL; | |
7b5018ca | 409 | const char *tz = NULL; |
8fcf1d61 YW |
410 | |
411 | if (link->network->dhcp_server_timezone) | |
412 | tz = link->network->dhcp_server_timezone; | |
413 | else { | |
414 | r = get_timezone(&buffer); | |
415 | if (r < 0) | |
7b5018ca | 416 | log_link_warning_errno(link, r, "Failed to determine timezone, not sending timezone: %m"); |
417 | else | |
418 | tz = buffer; | |
8fcf1d61 YW |
419 | } |
420 | ||
7b5018ca | 421 | if (tz) { |
422 | r = sd_dhcp_server_set_timezone(link->dhcp_server, tz); | |
423 | if (r < 0) | |
424 | return log_link_error_errno(link, r, "Failed to set timezone for DHCP server: %m"); | |
425 | } | |
8fcf1d61 | 426 | } |
564ca984 | 427 | |
90e74a66 | 428 | ORDERED_HASHMAP_FOREACH(p, link->network->dhcp_server_send_options) { |
461dbb2f | 429 | r = sd_dhcp_server_add_option(link->dhcp_server, p); |
564ca984 SS |
430 | if (r == -EEXIST) |
431 | continue; | |
432 | if (r < 0) | |
c00c3b64 | 433 | return log_link_error_errno(link, r, "Failed to set DHCPv4 option: %m"); |
564ca984 SS |
434 | } |
435 | ||
90e74a66 | 436 | ORDERED_HASHMAP_FOREACH(p, link->network->dhcp_server_send_vendor_options) { |
7354900d DW |
437 | r = sd_dhcp_server_add_vendor_option(link->dhcp_server, p); |
438 | if (r == -EEXIST) | |
439 | continue; | |
440 | if (r < 0) | |
441 | return log_link_error_errno(link, r, "Failed to set DHCPv4 option: %m"); | |
442 | } | |
443 | ||
c517a49b | 444 | HASHMAP_FOREACH(static_lease, link->network->dhcp_static_leases_by_section) { |
445 | r = sd_dhcp_server_set_static_lease(link->dhcp_server, &static_lease->address, static_lease->client_id, static_lease->client_id_size); | |
446 | if (r < 0) | |
447 | return log_link_error_errno(link, r, "Failed to set DHCPv4 static lease for DHCP server: %m"); | |
448 | } | |
449 | ||
8fcf1d61 YW |
450 | if (!sd_dhcp_server_is_running(link->dhcp_server)) { |
451 | r = sd_dhcp_server_start(link->dhcp_server); | |
452 | if (r < 0) | |
a0fa3ef7 | 453 | return log_link_error_errno(link, r, "Could not start DHCPv4 server instance: %m"); |
5ae0fb7f YW |
454 | |
455 | log_link_debug(link, "Offering DHCPv4 leases"); | |
8fcf1d61 YW |
456 | } |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
11c38d3e YA |
461 | int config_parse_dhcp_server_relay_agent_suboption( |
462 | const char *unit, | |
463 | const char *filename, | |
464 | unsigned line, | |
465 | const char *section, | |
466 | unsigned section_line, | |
467 | const char *lvalue, | |
468 | int ltype, | |
469 | const char *rvalue, | |
470 | void *data, | |
471 | void *userdata) { | |
472 | ||
473 | char **suboption_value = data; | |
474 | char* p; | |
475 | ||
476 | assert(filename); | |
477 | assert(lvalue); | |
478 | assert(rvalue); | |
479 | ||
11c38d3e YA |
480 | if (isempty(rvalue)) { |
481 | *suboption_value = mfree(*suboption_value); | |
482 | return 0; | |
483 | } | |
484 | ||
485 | p = startswith(rvalue, "string:"); | |
486 | if (!p) { | |
487 | log_syntax(unit, LOG_WARNING, filename, line, 0, | |
488 | "Failed to parse %s=%s'. Invalid format, ignoring.", lvalue, rvalue); | |
489 | return 0; | |
490 | } | |
491 | return free_and_strdup(suboption_value, empty_to_null(p)); | |
492 | } | |
493 | ||
2a71d57f | 494 | int config_parse_dhcp_server_emit( |
8fcf1d61 YW |
495 | const char *unit, |
496 | const char *filename, | |
497 | unsigned line, | |
2a71d57f LP |
498 | const char *section, |
499 | unsigned section_line, | |
8fcf1d61 | 500 | const char *lvalue, |
2a71d57f | 501 | int ltype, |
8fcf1d61 | 502 | const char *rvalue, |
2a71d57f LP |
503 | void *data, |
504 | void *userdata) { | |
8fcf1d61 | 505 | |
2a71d57f LP |
506 | NetworkDHCPServerEmitAddress *emit = data; |
507 | ||
508 | assert(emit); | |
8fcf1d61 YW |
509 | assert(rvalue); |
510 | ||
c1997a5b | 511 | for (const char *p = rvalue;;) { |
8fcf1d61 YW |
512 | _cleanup_free_ char *w = NULL; |
513 | union in_addr_union a; | |
c1997a5b | 514 | int r; |
8fcf1d61 YW |
515 | |
516 | r = extract_first_word(&p, &w, NULL, 0); | |
517 | if (r == -ENOMEM) | |
518 | return log_oom(); | |
519 | if (r < 0) { | |
d96edb2c | 520 | log_syntax(unit, LOG_WARNING, filename, line, r, |
8fcf1d61 YW |
521 | "Failed to extract word, ignoring: %s", rvalue); |
522 | return 0; | |
523 | } | |
524 | if (r == 0) | |
c1997a5b | 525 | return 0; |
8fcf1d61 YW |
526 | |
527 | r = in_addr_from_string(AF_INET, w, &a); | |
528 | if (r < 0) { | |
d96edb2c | 529 | log_syntax(unit, LOG_WARNING, filename, line, r, |
c1997a5b | 530 | "Failed to parse %s= address '%s', ignoring: %m", lvalue, w); |
8fcf1d61 YW |
531 | continue; |
532 | } | |
533 | ||
2a71d57f | 534 | struct in_addr *m = reallocarray(emit->addresses, emit->n_addresses + 1, sizeof(struct in_addr)); |
8fcf1d61 YW |
535 | if (!m) |
536 | return log_oom(); | |
537 | ||
2a71d57f LP |
538 | emit->addresses = m; |
539 | emit->addresses[emit->n_addresses++] = a.in; | |
8fcf1d61 | 540 | } |
8fcf1d61 | 541 | } |
0017ba31 YW |
542 | |
543 | int config_parse_dhcp_server_address( | |
544 | const char *unit, | |
545 | const char *filename, | |
546 | unsigned line, | |
547 | const char *section, | |
548 | unsigned section_line, | |
549 | const char *lvalue, | |
550 | int ltype, | |
551 | const char *rvalue, | |
552 | void *data, | |
553 | void *userdata) { | |
554 | ||
555 | Network *network = userdata; | |
556 | union in_addr_union a; | |
557 | unsigned char prefixlen; | |
558 | int r; | |
559 | ||
560 | assert(filename); | |
561 | assert(lvalue); | |
562 | assert(rvalue); | |
563 | ||
564 | if (isempty(rvalue)) { | |
565 | network->dhcp_server_address = (struct in_addr) {}; | |
566 | network->dhcp_server_address_prefixlen = 0; | |
567 | return 0; | |
568 | } | |
569 | ||
570 | r = in_addr_prefix_from_string(rvalue, AF_INET, &a, &prefixlen); | |
571 | if (r < 0) { | |
572 | log_syntax(unit, LOG_WARNING, filename, line, r, | |
573 | "Failed to parse %s=, ignoring assignment: %s", lvalue, rvalue); | |
574 | return 0; | |
575 | } | |
576 | if (in4_addr_is_null(&a.in) || in4_addr_is_localhost(&a.in)) { | |
577 | log_syntax(unit, LOG_WARNING, filename, line, 0, | |
578 | "DHCP server address cannot be the ANY address or a localhost address, " | |
579 | "ignoring assignment: %s", rvalue); | |
580 | return 0; | |
581 | } | |
582 | ||
583 | network->dhcp_server_address = a.in; | |
584 | network->dhcp_server_address_prefixlen = prefixlen; | |
585 | return 0; | |
586 | } |