]>
Commit | Line | Data |
---|---|---|
db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
8fcf1d61 | 2 | |
5ae0fb7f | 3 | #include <netinet/in.h> |
7b9da386 LP |
4 | #include <linux/if_arp.h> |
5 | #include <linux/if.h> | |
5ae0fb7f | 6 | |
8fcf1d61 YW |
7 | #include "sd-dhcp-server.h" |
8 | ||
34bea0a1 | 9 | #include "dhcp-protocol.h" |
dd1d3060 MAL |
10 | #include "fd-util.h" |
11 | #include "fileio.h" | |
34bea0a1 | 12 | #include "network-common.h" |
093e3533 | 13 | #include "networkd-address.h" |
a95e9306 | 14 | #include "networkd-dhcp-server-bus.h" |
c517a49b | 15 | #include "networkd-dhcp-server-static-lease.h" |
16 | #include "networkd-dhcp-server.h" | |
8fcf1d61 YW |
17 | #include "networkd-link.h" |
18 | #include "networkd-manager.h" | |
19 | #include "networkd-network.h" | |
1d28a3cf | 20 | #include "networkd-queue.h" |
344b3cff | 21 | #include "networkd-route-util.h" |
564ca984 | 22 | #include "parse-util.h" |
5582b36c | 23 | #include "path-util.h" |
dd1d3060 | 24 | #include "socket-netlink.h" |
564ca984 SS |
25 | #include "string-table.h" |
26 | #include "string-util.h" | |
dd1d3060 | 27 | #include "strv.h" |
8fcf1d61 | 28 | |
5ae0fb7f YW |
29 | static bool link_dhcp4_server_enabled(Link *link) { |
30 | assert(link); | |
31 | ||
32 | if (link->flags & IFF_LOOPBACK) | |
33 | return false; | |
34 | ||
35 | if (!link->network) | |
36 | return false; | |
37 | ||
5ae0fb7f YW |
38 | if (link->iftype == ARPHRD_CAN) |
39 | return false; | |
40 | ||
41 | return link->network->dhcp_server; | |
42 | } | |
43 | ||
5459e11d YW |
44 | int network_adjust_dhcp_server(Network *network, Set **addresses) { |
45 | int r; | |
46 | ||
0017ba31 | 47 | assert(network); |
5459e11d | 48 | assert(addresses); |
0017ba31 YW |
49 | |
50 | if (!network->dhcp_server) | |
5459e11d | 51 | return 0; |
0017ba31 YW |
52 | |
53 | if (network->bond) { | |
54 | log_warning("%s: DHCPServer= is enabled for bond slave. Disabling DHCP server.", | |
55 | network->filename); | |
56 | network->dhcp_server = false; | |
5459e11d | 57 | return 0; |
0017ba31 YW |
58 | } |
59 | ||
5459e11d YW |
60 | assert(network->dhcp_server_address_prefixlen <= 32); |
61 | ||
62 | if (network->dhcp_server_address_prefixlen == 0) { | |
0017ba31 | 63 | Address *address; |
5459e11d YW |
64 | |
65 | /* If the server address is not specified, then find suitable static address. */ | |
0017ba31 YW |
66 | |
67 | ORDERED_HASHMAP_FOREACH(address, network->addresses_by_section) { | |
26f88471 | 68 | assert(!section_is_invalid(address->section)); |
bab29f2a YW |
69 | |
70 | if (address->family != AF_INET) | |
71 | continue; | |
72 | ||
73 | if (in4_addr_is_localhost(&address->in_addr.in)) | |
74 | continue; | |
75 | ||
76 | if (in4_addr_is_link_local(&address->in_addr.in)) | |
77 | continue; | |
78 | ||
79 | if (in4_addr_is_set(&address->in_addr_peer.in)) | |
80 | continue; | |
81 | ||
5459e11d YW |
82 | /* TODO: check if the prefix length is small enough for the pool. */ |
83 | ||
84 | network->dhcp_server_address = address; | |
bab29f2a | 85 | break; |
0017ba31 | 86 | } |
5459e11d YW |
87 | if (!network->dhcp_server_address) { |
88 | log_warning("%s: DHCPServer= is enabled, but no suitable static address configured. " | |
0017ba31 YW |
89 | "Disabling DHCP server.", |
90 | network->filename); | |
91 | network->dhcp_server = false; | |
5459e11d | 92 | return 0; |
0017ba31 | 93 | } |
3b6a3bde | 94 | |
5459e11d | 95 | } else { |
ebd96906 | 96 | _cleanup_(address_unrefp) Address *a = NULL; |
5459e11d YW |
97 | Address *existing; |
98 | unsigned line; | |
99 | ||
100 | /* TODO: check if the prefix length is small enough for the pool. */ | |
101 | ||
102 | /* If an address is explicitly specified, then check if the corresponding [Address] section | |
103 | * is configured, and add one if not. */ | |
104 | ||
105 | existing = set_get(*addresses, | |
106 | &(Address) { | |
107 | .family = AF_INET, | |
108 | .in_addr.in = network->dhcp_server_address_in_addr, | |
109 | .prefixlen = network->dhcp_server_address_prefixlen, | |
110 | }); | |
111 | if (existing) { | |
112 | /* Corresponding [Address] section already exists. */ | |
113 | network->dhcp_server_address = existing; | |
114 | return 0; | |
115 | } | |
3b6a3bde | 116 | |
5459e11d YW |
117 | r = ordered_hashmap_by_section_find_unused_line(network->addresses_by_section, network->filename, &line); |
118 | if (r < 0) | |
119 | return log_warning_errno(r, "%s: Failed to find unused line number for DHCP server address: %m", | |
120 | network->filename); | |
3b6a3bde | 121 | |
5459e11d YW |
122 | r = address_new_static(network, network->filename, line, &a); |
123 | if (r < 0) | |
124 | return log_warning_errno(r, "%s: Failed to add new static address object for DHCP server: %m", | |
125 | network->filename); | |
8fcf1d61 | 126 | |
5459e11d YW |
127 | a->family = AF_INET; |
128 | a->prefixlen = network->dhcp_server_address_prefixlen; | |
129 | a->in_addr.in = network->dhcp_server_address_in_addr; | |
130 | a->requested_as_null = !in4_addr_is_set(&network->dhcp_server_address_in_addr); | |
8fcf1d61 | 131 | |
5459e11d YW |
132 | r = address_section_verify(a); |
133 | if (r < 0) | |
134 | return r; | |
8fcf1d61 | 135 | |
5459e11d YW |
136 | r = set_ensure_put(addresses, &address_hash_ops, a); |
137 | if (r < 0) | |
138 | return log_oom(); | |
139 | assert(r > 0); | |
3b6a3bde | 140 | |
5459e11d | 141 | network->dhcp_server_address = TAKE_PTR(a); |
3b6a3bde | 142 | } |
8fcf1d61 | 143 | |
5459e11d | 144 | return 0; |
8fcf1d61 YW |
145 | } |
146 | ||
5582b36c YW |
147 | static int link_start_dhcp4_server(Link *link) { |
148 | int r; | |
149 | ||
150 | assert(link); | |
151 | assert(link->manager); | |
152 | ||
153 | if (!link->dhcp_server) | |
154 | return 0; /* Not configured yet. */ | |
155 | ||
156 | if (!link_has_carrier(link)) | |
157 | return 0; | |
158 | ||
159 | /* TODO: Maybe, also check the system time is synced. If the system does not have RTC battery, then | |
160 | * the realtime clock in not usable in the early boot stage, and all saved leases may be wrongly | |
161 | * handled as expired and dropped. */ | |
162 | if (!sd_dhcp_server_is_in_relay_mode(link->dhcp_server) && | |
163 | !link->manager->persistent_storage_is_ready) | |
164 | return 0; | |
165 | ||
166 | r = sd_dhcp_server_start(link->dhcp_server); | |
167 | if (r < 0) | |
168 | return r; | |
169 | ||
170 | log_link_debug(link, "Offering DHCPv4 leases"); | |
171 | return 0; | |
172 | } | |
173 | ||
174 | void manager_toggle_dhcp4_server_state(Manager *manager, bool start) { | |
175 | Link *link; | |
176 | int r; | |
177 | ||
178 | assert(manager); | |
179 | ||
180 | HASHMAP_FOREACH(link, manager->links_by_index) { | |
181 | if (!link->dhcp_server) | |
182 | continue; | |
183 | if (sd_dhcp_server_is_in_relay_mode(link->dhcp_server)) | |
184 | continue; | |
185 | ||
186 | if (start) | |
187 | r = link_start_dhcp4_server(link); | |
188 | else | |
189 | r = sd_dhcp_server_stop(link->dhcp_server); | |
190 | if (r < 0) | |
191 | log_link_debug_errno(link, r, "Failed to %s DHCP server, ignoring: %m", | |
192 | start ? "start" : "stop"); | |
193 | } | |
194 | } | |
195 | ||
165d7c5c YW |
196 | static int dhcp_server_find_uplink(Link *link, Link **ret) { |
197 | assert(link); | |
198 | ||
199 | if (link->network->dhcp_server_uplink_name) | |
200 | return link_get_by_name(link->manager, link->network->dhcp_server_uplink_name, ret); | |
201 | ||
202 | if (link->network->dhcp_server_uplink_index > 0) | |
6eab614d | 203 | return link_get_by_index(link->manager, link->network->dhcp_server_uplink_index, ret); |
165d7c5c | 204 | |
63295b42 | 205 | if (link->network->dhcp_server_uplink_index == UPLINK_INDEX_AUTO) { |
165d7c5c YW |
206 | /* It is not necessary to propagate error in automatic selection. */ |
207 | if (manager_find_uplink(link->manager, AF_INET, link, ret) < 0) | |
208 | *ret = NULL; | |
209 | return 0; | |
210 | } | |
211 | ||
212 | *ret = NULL; | |
213 | return 0; | |
214 | } | |
215 | ||
2a71d57f LP |
216 | static int link_push_uplink_to_dhcp_server( |
217 | Link *link, | |
2324fd3a | 218 | sd_dhcp_lease_server_type_t what, |
2a71d57f LP |
219 | sd_dhcp_server *s) { |
220 | ||
8fcf1d61 | 221 | _cleanup_free_ struct in_addr *addresses = NULL; |
2a71d57f | 222 | bool use_dhcp_lease_data = true; |
319a4f4b | 223 | size_t n_addresses = 0; |
8fcf1d61 | 224 | |
2a71d57f | 225 | assert(link); |
8fcf1d61 | 226 | |
2a71d57f LP |
227 | if (!link->network) |
228 | return 0; | |
229 | assert(link->network); | |
8fcf1d61 | 230 | |
2a71d57f | 231 | log_link_debug(link, "Copying %s from link", dhcp_lease_server_type_to_string(what)); |
8fcf1d61 | 232 | |
2a71d57f | 233 | switch (what) { |
8fcf1d61 | 234 | |
2a71d57f LP |
235 | case SD_DHCP_LEASE_DNS: |
236 | /* For DNS we have a special case. We the data configured explicitly locally along with the | |
237 | * data from the DHCP lease. */ | |
8fcf1d61 | 238 | |
2a71d57f LP |
239 | for (unsigned i = 0; i < link->network->n_dns; i++) { |
240 | struct in_addr ia; | |
8fcf1d61 | 241 | |
2a71d57f | 242 | /* Only look for IPv4 addresses */ |
e77bd3fd | 243 | if (link->network->dns[i]->family != AF_INET) |
2a71d57f | 244 | continue; |
8fcf1d61 | 245 | |
e77bd3fd | 246 | ia = link->network->dns[i]->address.in; |
2a71d57f LP |
247 | |
248 | /* Never propagate obviously borked data */ | |
249 | if (in4_addr_is_null(&ia) || in4_addr_is_localhost(&ia)) | |
250 | continue; | |
251 | ||
319a4f4b | 252 | if (!GREEDY_REALLOC(addresses, n_addresses + 1)) |
8fcf1d61 YW |
253 | return log_oom(); |
254 | ||
2a71d57f | 255 | addresses[n_addresses++] = ia; |
8fcf1d61 | 256 | } |
8fcf1d61 | 257 | |
2a71d57f LP |
258 | use_dhcp_lease_data = link->network->dhcp_use_dns; |
259 | break; | |
8fcf1d61 | 260 | |
2a71d57f | 261 | case SD_DHCP_LEASE_NTP: { |
2a71d57f LP |
262 | /* For NTP things are similar, but for NTP hostnames can be configured too, which we cannot |
263 | * propagate via DHCP. Hence let's only propagate those which are IP addresses. */ | |
284e8fd0 | 264 | |
2a71d57f LP |
265 | STRV_FOREACH(i, link->network->ntp) { |
266 | union in_addr_union ia; | |
284e8fd0 | 267 | |
2a71d57f LP |
268 | if (in_addr_from_string(AF_INET, *i, &ia) < 0) |
269 | continue; | |
284e8fd0 | 270 | |
2a71d57f LP |
271 | /* Never propagate obviously borked data */ |
272 | if (in4_addr_is_null(&ia.in) || in4_addr_is_localhost(&ia.in)) | |
273 | continue; | |
284e8fd0 | 274 | |
319a4f4b | 275 | if (!GREEDY_REALLOC(addresses, n_addresses + 1)) |
2a71d57f | 276 | return log_oom(); |
284e8fd0 | 277 | |
2a71d57f LP |
278 | addresses[n_addresses++] = ia.in; |
279 | } | |
284e8fd0 | 280 | |
2a71d57f | 281 | use_dhcp_lease_data = link->network->dhcp_use_ntp; |
24e6f458 | 282 | break; |
2a71d57f | 283 | } |
284e8fd0 | 284 | |
ddb82ec2 | 285 | case SD_DHCP_LEASE_SIP: |
2a71d57f LP |
286 | |
287 | /* For SIP we don't allow explicit, local configuration, but there's control whether to use the data */ | |
288 | use_dhcp_lease_data = link->network->dhcp_use_sip; | |
24e6f458 | 289 | break; |
284e8fd0 | 290 | |
2a71d57f LP |
291 | case SD_DHCP_LEASE_POP3: |
292 | case SD_DHCP_LEASE_SMTP: | |
ddb82ec2 | 293 | case SD_DHCP_LEASE_LPR: |
2a71d57f LP |
294 | /* For the other server types we currently do not allow local configuration of server data, |
295 | * since there are typically no local consumers of the data. */ | |
c4e585a3 | 296 | break; |
d361b373 | 297 | |
24e6f458 | 298 | default: |
04499a70 | 299 | assert_not_reached(); |
f6269fe7 SS |
300 | } |
301 | ||
2a71d57f | 302 | if (use_dhcp_lease_data && link->dhcp_lease) { |
24e6f458 | 303 | const struct in_addr *da; |
f6269fe7 | 304 | |
a2706075 | 305 | int n = sd_dhcp_lease_get_servers(link->dhcp_lease, what, &da); |
f6269fe7 | 306 | if (n > 0) { |
319a4f4b | 307 | if (!GREEDY_REALLOC(addresses, n_addresses + n)) |
f6269fe7 SS |
308 | return log_oom(); |
309 | ||
2a71d57f LP |
310 | for (int j = 0; j < n; j++) |
311 | if (in4_addr_is_non_local(&da[j])) | |
312 | addresses[n_addresses++] = da[j]; | |
f6269fe7 SS |
313 | } |
314 | } | |
315 | ||
316 | if (n_addresses <= 0) | |
317 | return 0; | |
318 | ||
24e6f458 | 319 | return sd_dhcp_server_set_servers(s, what, addresses, n_addresses); |
299d578f SS |
320 | } |
321 | ||
319a4f4b LP |
322 | static int dhcp4_server_parse_dns_server_string_and_warn( |
323 | const char *string, | |
324 | struct in_addr **addresses, | |
325 | size_t *n_addresses) { | |
326 | ||
dd1d3060 MAL |
327 | for (;;) { |
328 | _cleanup_free_ char *word = NULL, *server_name = NULL; | |
329 | union in_addr_union address; | |
330 | int family, r, ifindex = 0; | |
331 | ||
332 | r = extract_first_word(&string, &word, NULL, 0); | |
333 | if (r < 0) | |
334 | return r; | |
335 | if (r == 0) | |
336 | break; | |
337 | ||
338 | r = in_addr_ifindex_name_from_string_auto(word, &family, &address, &ifindex, &server_name); | |
339 | if (r < 0) { | |
340 | log_warning_errno(r, "Failed to parse DNS server address '%s', ignoring: %m", word); | |
341 | continue; | |
342 | } | |
343 | ||
344 | /* Only look for IPv4 addresses */ | |
345 | if (family != AF_INET) | |
346 | continue; | |
347 | ||
348 | /* Never propagate obviously borked data */ | |
349 | if (in4_addr_is_null(&address.in) || in4_addr_is_localhost(&address.in)) | |
350 | continue; | |
351 | ||
319a4f4b | 352 | if (!GREEDY_REALLOC(*addresses, *n_addresses + 1)) |
dd1d3060 MAL |
353 | return log_oom(); |
354 | ||
355 | (*addresses)[(*n_addresses)++] = address.in; | |
356 | } | |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
361 | static int dhcp4_server_set_dns_from_resolve_conf(Link *link) { | |
362 | _cleanup_free_ struct in_addr *addresses = NULL; | |
dd1d3060 | 363 | _cleanup_fclose_ FILE *f = NULL; |
319a4f4b | 364 | size_t n_addresses = 0; |
f8769631 | 365 | int r; |
dd1d3060 MAL |
366 | |
367 | f = fopen(PRIVATE_UPLINK_RESOLV_CONF, "re"); | |
368 | if (!f) { | |
369 | if (errno == ENOENT) | |
370 | return 0; | |
371 | ||
372 | return log_warning_errno(errno, "Failed to open " PRIVATE_UPLINK_RESOLV_CONF ": %m"); | |
373 | } | |
374 | ||
375 | for (;;) { | |
376 | _cleanup_free_ char *line = NULL; | |
377 | const char *a; | |
dd1d3060 | 378 | |
0ff6ff2b | 379 | r = read_stripped_line(f, LONG_LINE_MAX, &line); |
dd1d3060 MAL |
380 | if (r < 0) |
381 | return log_error_errno(r, "Failed to read " PRIVATE_UPLINK_RESOLV_CONF ": %m"); | |
382 | if (r == 0) | |
383 | break; | |
384 | ||
0ff6ff2b | 385 | if (IN_SET(*line, '#', ';', 0)) |
dd1d3060 MAL |
386 | continue; |
387 | ||
0ff6ff2b | 388 | a = first_word(line, "nameserver"); |
dd1d3060 MAL |
389 | if (!a) |
390 | continue; | |
391 | ||
319a4f4b | 392 | r = dhcp4_server_parse_dns_server_string_and_warn(a, &addresses, &n_addresses); |
dd1d3060 MAL |
393 | if (r < 0) |
394 | log_warning_errno(r, "Failed to parse DNS server address '%s', ignoring.", a); | |
395 | } | |
396 | ||
397 | if (n_addresses <= 0) | |
398 | return 0; | |
399 | ||
400 | return sd_dhcp_server_set_dns(link->dhcp_server, addresses, n_addresses); | |
401 | } | |
402 | ||
1d28a3cf | 403 | static int dhcp4_server_configure(Link *link) { |
8fcf1d61 | 404 | bool acquired_uplink = false; |
461dbb2f | 405 | sd_dhcp_option *p; |
c517a49b | 406 | DHCPStaticLease *static_lease; |
564ca984 SS |
407 | Link *uplink = NULL; |
408 | Address *address; | |
11c38d3e | 409 | bool bind_to_interface; |
8fcf1d61 YW |
410 | int r; |
411 | ||
5ae0fb7f | 412 | assert(link); |
5459e11d YW |
413 | assert(link->network); |
414 | assert(link->network->dhcp_server_address); | |
5ae0fb7f | 415 | |
1d28a3cf | 416 | log_link_debug(link, "Configuring DHCP Server."); |
5ae0fb7f | 417 | |
1d28a3cf YW |
418 | if (link->dhcp_server) |
419 | return -EBUSY; | |
5ae0fb7f | 420 | |
1d28a3cf YW |
421 | r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex); |
422 | if (r < 0) | |
423 | return r; | |
5ae0fb7f | 424 | |
1d28a3cf YW |
425 | r = sd_dhcp_server_attach_event(link->dhcp_server, link->manager->event, 0); |
426 | if (r < 0) | |
427 | return r; | |
5ae0fb7f | 428 | |
a95e9306 LK |
429 | r = sd_dhcp_server_set_callback(link->dhcp_server, dhcp_server_callback, link); |
430 | if (r < 0) | |
431 | return log_link_warning_errno(link, r, "Failed to set callback for DHCPv4 server instance: %m"); | |
432 | ||
5459e11d | 433 | r = address_get(link, link->network->dhcp_server_address, &address); |
0017ba31 YW |
434 | if (r < 0) |
435 | return log_link_error_errno(link, r, "Failed to find suitable address for DHCPv4 server instance: %m"); | |
8fcf1d61 YW |
436 | |
437 | /* use the server address' subnet as the pool */ | |
438 | r = sd_dhcp_server_configure_pool(link->dhcp_server, &address->in_addr.in, address->prefixlen, | |
439 | link->network->dhcp_server_pool_offset, link->network->dhcp_server_pool_size); | |
440 | if (r < 0) | |
c00c3b64 | 441 | return log_link_error_errno(link, r, "Failed to configure address pool for DHCPv4 server instance: %m"); |
8fcf1d61 | 442 | |
8fcf1d61 | 443 | if (link->network->dhcp_server_max_lease_time_usec > 0) { |
a0007611 | 444 | r = sd_dhcp_server_set_max_lease_time(link->dhcp_server, link->network->dhcp_server_max_lease_time_usec); |
8fcf1d61 | 445 | if (r < 0) |
c00c3b64 | 446 | return log_link_error_errno(link, r, "Failed to set maximum lease time for DHCPv4 server instance: %m"); |
8fcf1d61 YW |
447 | } |
448 | ||
449 | if (link->network->dhcp_server_default_lease_time_usec > 0) { | |
a0007611 | 450 | r = sd_dhcp_server_set_default_lease_time(link->dhcp_server, link->network->dhcp_server_default_lease_time_usec); |
8fcf1d61 | 451 | if (r < 0) |
c00c3b64 | 452 | return log_link_error_errno(link, r, "Failed to set default lease time for DHCPv4 server instance: %m"); |
8fcf1d61 YW |
453 | } |
454 | ||
34bea0a1 SS |
455 | r = sd_dhcp_server_set_ipv6_only_preferred_usec(link->dhcp_server, link->network->dhcp_server_ipv6_only_preferred_usec); |
456 | if (r < 0) | |
457 | return log_link_error_errno(link, r, "Failed to set IPv6 only preferred time for DHCPv4 server instance: %m"); | |
458 | ||
6278e428 | 459 | r = sd_dhcp_server_set_boot_server_address(link->dhcp_server, &link->network->dhcp_server_boot_server_address); |
369ac192 | 460 | if (r < 0) |
6278e428 | 461 | return log_link_warning_errno(link, r, "Failed to set boot server address for DHCPv4 server instance: %m"); |
369ac192 | 462 | |
6278e428 | 463 | r = sd_dhcp_server_set_boot_server_name(link->dhcp_server, link->network->dhcp_server_boot_server_name); |
369ac192 | 464 | if (r < 0) |
6278e428 YW |
465 | return log_link_warning_errno(link, r, "Failed to set boot server name for DHCPv4 server instance: %m"); |
466 | ||
467 | r = sd_dhcp_server_set_boot_filename(link->dhcp_server, link->network->dhcp_server_boot_filename); | |
468 | if (r < 0) | |
469 | return log_link_warning_errno(link, r, "Failed to set boot filename for DHCPv4 server instance: %m"); | |
369ac192 | 470 | |
1fa0a4ef YW |
471 | r = sd_dhcp_server_set_rapid_commit(link->dhcp_server, link->network->dhcp_server_rapid_commit); |
472 | if (r < 0) | |
473 | return log_link_warning_errno(link, r, "Failed to %s Rapid Commit support for DHCPv4 server instance: %m", | |
474 | enable_disable(link->network->dhcp_server_rapid_commit)); | |
475 | ||
b3a9d980 | 476 | for (sd_dhcp_lease_server_type_t type = 0; type < _SD_DHCP_LEASE_SERVER_TYPE_MAX; type++) { |
2a71d57f LP |
477 | |
478 | if (!link->network->dhcp_server_emit[type].emit) | |
479 | continue; | |
480 | ||
481 | if (link->network->dhcp_server_emit[type].n_addresses > 0) | |
482 | /* Explicitly specified servers to emit */ | |
483 | r = sd_dhcp_server_set_servers( | |
484 | link->dhcp_server, | |
485 | type, | |
486 | link->network->dhcp_server_emit[type].addresses, | |
487 | link->network->dhcp_server_emit[type].n_addresses); | |
488 | else { | |
489 | /* Emission is requested, but nothing explicitly configured. Let's find a suitable upling */ | |
490 | if (!acquired_uplink) { | |
165d7c5c | 491 | (void) dhcp_server_find_uplink(link, &uplink); |
2a71d57f LP |
492 | acquired_uplink = true; |
493 | } | |
494 | ||
495 | if (uplink && uplink->network) | |
496 | r = link_push_uplink_to_dhcp_server(uplink, type, link->dhcp_server); | |
497 | else if (type == SD_DHCP_LEASE_DNS) | |
498 | r = dhcp4_server_set_dns_from_resolve_conf(link); | |
24e6f458 | 499 | else { |
2a71d57f LP |
500 | log_link_debug(link, |
501 | "Not emitting %s on link, couldn't find suitable uplink.", | |
502 | dhcp_lease_server_type_to_string(type)); | |
503 | continue; | |
24e6f458 | 504 | } |
299d578f | 505 | } |
284e8fd0 | 506 | |
2a71d57f LP |
507 | if (r < 0) |
508 | log_link_warning_errno(link, r, | |
509 | "Failed to set %s for DHCP server, ignoring: %m", | |
510 | dhcp_lease_server_type_to_string(type)); | |
511 | } | |
512 | ||
59aa6220 YW |
513 | if (link->network->dhcp_server_emit_router) { |
514 | r = sd_dhcp_server_set_router(link->dhcp_server, &link->network->dhcp_server_router); | |
515 | if (r < 0) | |
516 | return log_link_error_errno(link, r, "Failed to set router address for DHCP server: %m"); | |
517 | } | |
8fcf1d61 | 518 | |
c95df587 YA |
519 | r = sd_dhcp_server_set_relay_target(link->dhcp_server, &link->network->dhcp_server_relay_target); |
520 | if (r < 0) | |
521 | return log_link_error_errno(link, r, "Failed to set relay target for DHCP server: %m"); | |
522 | ||
11c38d3e YA |
523 | bind_to_interface = sd_dhcp_server_is_in_relay_mode(link->dhcp_server) ? false : link->network->dhcp_server_bind_to_interface; |
524 | r = sd_dhcp_server_set_bind_to_interface(link->dhcp_server, bind_to_interface); | |
525 | if (r < 0) | |
526 | return log_link_error_errno(link, r, "Failed to set interface binding for DHCP server: %m"); | |
527 | ||
528 | 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); | |
529 | if (r < 0) | |
530 | return log_link_error_errno(link, r, "Failed to set agent circuit/remote id for DHCP server: %m"); | |
531 | ||
8fcf1d61 YW |
532 | if (link->network->dhcp_server_emit_timezone) { |
533 | _cleanup_free_ char *buffer = NULL; | |
7b5018ca | 534 | const char *tz = NULL; |
8fcf1d61 YW |
535 | |
536 | if (link->network->dhcp_server_timezone) | |
537 | tz = link->network->dhcp_server_timezone; | |
538 | else { | |
539 | r = get_timezone(&buffer); | |
540 | if (r < 0) | |
7b5018ca | 541 | log_link_warning_errno(link, r, "Failed to determine timezone, not sending timezone: %m"); |
542 | else | |
543 | tz = buffer; | |
8fcf1d61 YW |
544 | } |
545 | ||
7b5018ca | 546 | if (tz) { |
547 | r = sd_dhcp_server_set_timezone(link->dhcp_server, tz); | |
548 | if (r < 0) | |
549 | return log_link_error_errno(link, r, "Failed to set timezone for DHCP server: %m"); | |
550 | } | |
8fcf1d61 | 551 | } |
564ca984 | 552 | |
90e74a66 | 553 | ORDERED_HASHMAP_FOREACH(p, link->network->dhcp_server_send_options) { |
461dbb2f | 554 | r = sd_dhcp_server_add_option(link->dhcp_server, p); |
564ca984 SS |
555 | if (r == -EEXIST) |
556 | continue; | |
557 | if (r < 0) | |
c00c3b64 | 558 | return log_link_error_errno(link, r, "Failed to set DHCPv4 option: %m"); |
564ca984 SS |
559 | } |
560 | ||
90e74a66 | 561 | ORDERED_HASHMAP_FOREACH(p, link->network->dhcp_server_send_vendor_options) { |
7354900d DW |
562 | r = sd_dhcp_server_add_vendor_option(link->dhcp_server, p); |
563 | if (r == -EEXIST) | |
564 | continue; | |
565 | if (r < 0) | |
566 | return log_link_error_errno(link, r, "Failed to set DHCPv4 option: %m"); | |
567 | } | |
568 | ||
c517a49b | 569 | HASHMAP_FOREACH(static_lease, link->network->dhcp_static_leases_by_section) { |
570 | r = sd_dhcp_server_set_static_lease(link->dhcp_server, &static_lease->address, static_lease->client_id, static_lease->client_id_size); | |
571 | if (r < 0) | |
572 | return log_link_error_errno(link, r, "Failed to set DHCPv4 static lease for DHCP server: %m"); | |
573 | } | |
574 | ||
5582b36c YW |
575 | if (!sd_dhcp_server_is_in_relay_mode(link->dhcp_server)) { |
576 | _cleanup_free_ char *lease_file = path_join("/var/lib/systemd/network/dhcp-server-lease/", link->ifname); | |
577 | if (!lease_file) | |
578 | return log_oom(); | |
579 | ||
580 | r = sd_dhcp_server_set_lease_file(link->dhcp_server, lease_file); | |
581 | if (r < 0) | |
582 | log_link_warning_errno(link, r, "Failed to load DHCPv4 server leases, ignoring: %m"); | |
583 | } | |
584 | ||
585 | r = link_start_dhcp4_server(link); | |
ab486ef4 YW |
586 | if (r < 0) |
587 | return log_link_error_errno(link, r, "Could not start DHCPv4 server instance: %m"); | |
5ae0fb7f | 588 | |
745f0620 | 589 | return 0; |
1d28a3cf YW |
590 | } |
591 | ||
1d28a3cf | 592 | static bool dhcp_server_is_ready_to_configure(Link *link) { |
165d7c5c | 593 | Link *uplink = NULL; |
1d28a3cf YW |
594 | Address *a; |
595 | ||
596 | assert(link); | |
5459e11d YW |
597 | assert(link->network); |
598 | assert(link->network->dhcp_server_address); | |
1d28a3cf | 599 | |
4b482e8b | 600 | if (!link_is_ready_to_configure(link, /* allow_unmanaged = */ false)) |
baa95d22 YW |
601 | return false; |
602 | ||
1d28a3cf YW |
603 | if (!link_has_carrier(link)) |
604 | return false; | |
605 | ||
1d28a3cf YW |
606 | if (!link->static_addresses_configured) |
607 | return false; | |
608 | ||
5459e11d | 609 | if (address_get(link, link->network->dhcp_server_address, &a) < 0) |
1d28a3cf YW |
610 | return false; |
611 | ||
612 | if (!address_is_ready(a)) | |
613 | return false; | |
614 | ||
165d7c5c YW |
615 | if (dhcp_server_find_uplink(link, &uplink) < 0) |
616 | return false; | |
617 | ||
618 | if (uplink && !uplink->network) | |
619 | return false; | |
620 | ||
1d28a3cf YW |
621 | return true; |
622 | } | |
623 | ||
09d09207 | 624 | static int dhcp_server_process_request(Request *req, Link *link, void *userdata) { |
745f0620 YW |
625 | int r; |
626 | ||
ff51134c | 627 | assert(link); |
1d28a3cf | 628 | |
745f0620 | 629 | if (!dhcp_server_is_ready_to_configure(link)) |
1d28a3cf YW |
630 | return 0; |
631 | ||
745f0620 YW |
632 | r = dhcp4_server_configure(link); |
633 | if (r < 0) | |
634 | return log_link_warning_errno(link, r, "Failed to configure DHCP server: %m"); | |
635 | ||
636 | return 1; | |
8fcf1d61 YW |
637 | } |
638 | ||
8bed7c55 | 639 | int link_request_dhcp_server(Link *link) { |
745f0620 YW |
640 | int r; |
641 | ||
8bed7c55 YW |
642 | assert(link); |
643 | ||
644 | if (!link_dhcp4_server_enabled(link)) | |
645 | return 0; | |
646 | ||
647 | if (link->dhcp_server) | |
648 | return 0; | |
649 | ||
650 | log_link_debug(link, "Requesting DHCP server."); | |
09d09207 | 651 | r = link_queue_request(link, REQUEST_TYPE_DHCP_SERVER, dhcp_server_process_request, NULL); |
745f0620 YW |
652 | if (r < 0) |
653 | return log_link_warning_errno(link, r, "Failed to request configuration of DHCP server: %m"); | |
654 | ||
655 | return 0; | |
8bed7c55 YW |
656 | } |
657 | ||
11c38d3e YA |
658 | int config_parse_dhcp_server_relay_agent_suboption( |
659 | const char *unit, | |
660 | const char *filename, | |
661 | unsigned line, | |
662 | const char *section, | |
663 | unsigned section_line, | |
664 | const char *lvalue, | |
665 | int ltype, | |
666 | const char *rvalue, | |
667 | void *data, | |
668 | void *userdata) { | |
669 | ||
670 | char **suboption_value = data; | |
671 | char* p; | |
672 | ||
673 | assert(filename); | |
674 | assert(lvalue); | |
675 | assert(rvalue); | |
676 | ||
11c38d3e YA |
677 | if (isempty(rvalue)) { |
678 | *suboption_value = mfree(*suboption_value); | |
679 | return 0; | |
680 | } | |
681 | ||
682 | p = startswith(rvalue, "string:"); | |
683 | if (!p) { | |
684 | log_syntax(unit, LOG_WARNING, filename, line, 0, | |
685 | "Failed to parse %s=%s'. Invalid format, ignoring.", lvalue, rvalue); | |
686 | return 0; | |
687 | } | |
688 | return free_and_strdup(suboption_value, empty_to_null(p)); | |
689 | } | |
690 | ||
2a71d57f | 691 | int config_parse_dhcp_server_emit( |
8fcf1d61 YW |
692 | const char *unit, |
693 | const char *filename, | |
694 | unsigned line, | |
2a71d57f LP |
695 | const char *section, |
696 | unsigned section_line, | |
8fcf1d61 | 697 | const char *lvalue, |
2a71d57f | 698 | int ltype, |
8fcf1d61 | 699 | const char *rvalue, |
2a71d57f LP |
700 | void *data, |
701 | void *userdata) { | |
8fcf1d61 | 702 | |
99534007 | 703 | NetworkDHCPServerEmitAddress *emit = ASSERT_PTR(data); |
2a71d57f | 704 | |
8fcf1d61 YW |
705 | assert(rvalue); |
706 | ||
faa1b3c6 YW |
707 | if (isempty(rvalue)) { |
708 | emit->addresses = mfree(emit->addresses); | |
709 | emit->n_addresses = 0; | |
710 | return 0; | |
711 | } | |
712 | ||
c1997a5b | 713 | for (const char *p = rvalue;;) { |
8fcf1d61 YW |
714 | _cleanup_free_ char *w = NULL; |
715 | union in_addr_union a; | |
c1997a5b | 716 | int r; |
8fcf1d61 YW |
717 | |
718 | r = extract_first_word(&p, &w, NULL, 0); | |
719 | if (r == -ENOMEM) | |
720 | return log_oom(); | |
721 | if (r < 0) { | |
d96edb2c | 722 | log_syntax(unit, LOG_WARNING, filename, line, r, |
8fcf1d61 YW |
723 | "Failed to extract word, ignoring: %s", rvalue); |
724 | return 0; | |
725 | } | |
726 | if (r == 0) | |
c1997a5b | 727 | return 0; |
8fcf1d61 | 728 | |
5f468b9f YW |
729 | if (streq(w, "_server_address")) |
730 | a = IN_ADDR_NULL; /* null address will be converted to the server address. */ | |
731 | else { | |
732 | r = in_addr_from_string(AF_INET, w, &a); | |
733 | if (r < 0) { | |
734 | log_syntax(unit, LOG_WARNING, filename, line, r, | |
735 | "Failed to parse %s= address '%s', ignoring: %m", lvalue, w); | |
736 | continue; | |
737 | } | |
738 | ||
739 | if (in4_addr_is_null(&a.in)) { | |
740 | log_syntax(unit, LOG_WARNING, filename, line, 0, | |
741 | "Found a null address in %s=, ignoring.", lvalue); | |
742 | continue; | |
743 | } | |
8fcf1d61 YW |
744 | } |
745 | ||
77e73102 | 746 | if (!GREEDY_REALLOC(emit->addresses, emit->n_addresses + 1)) |
8fcf1d61 YW |
747 | return log_oom(); |
748 | ||
2a71d57f | 749 | emit->addresses[emit->n_addresses++] = a.in; |
8fcf1d61 | 750 | } |
8fcf1d61 | 751 | } |
0017ba31 YW |
752 | |
753 | int config_parse_dhcp_server_address( | |
754 | const char *unit, | |
755 | const char *filename, | |
756 | unsigned line, | |
757 | const char *section, | |
758 | unsigned section_line, | |
759 | const char *lvalue, | |
760 | int ltype, | |
761 | const char *rvalue, | |
762 | void *data, | |
763 | void *userdata) { | |
764 | ||
6278e428 | 765 | Network *network = ASSERT_PTR(userdata); |
0017ba31 YW |
766 | union in_addr_union a; |
767 | unsigned char prefixlen; | |
768 | int r; | |
769 | ||
770 | assert(filename); | |
771 | assert(lvalue); | |
772 | assert(rvalue); | |
773 | ||
774 | if (isempty(rvalue)) { | |
5459e11d | 775 | network->dhcp_server_address_in_addr = (struct in_addr) {}; |
0017ba31 YW |
776 | network->dhcp_server_address_prefixlen = 0; |
777 | return 0; | |
778 | } | |
779 | ||
780 | r = in_addr_prefix_from_string(rvalue, AF_INET, &a, &prefixlen); | |
781 | if (r < 0) { | |
782 | log_syntax(unit, LOG_WARNING, filename, line, r, | |
783 | "Failed to parse %s=, ignoring assignment: %s", lvalue, rvalue); | |
784 | return 0; | |
785 | } | |
a0dfce0a | 786 | if (in4_addr_is_localhost(&a.in) || in4_addr_is_link_local(&a.in)) { |
0017ba31 | 787 | log_syntax(unit, LOG_WARNING, filename, line, 0, |
a0dfce0a | 788 | "DHCP server address cannot be a localhost or link-local address, " |
0017ba31 YW |
789 | "ignoring assignment: %s", rvalue); |
790 | return 0; | |
791 | } | |
792 | ||
5459e11d | 793 | network->dhcp_server_address_in_addr = a.in; |
0017ba31 YW |
794 | network->dhcp_server_address_prefixlen = prefixlen; |
795 | return 0; | |
796 | } | |
34bea0a1 SS |
797 | |
798 | int config_parse_dhcp_server_ipv6_only_preferred( | |
799 | const char *unit, | |
800 | const char *filename, | |
801 | unsigned line, | |
802 | const char *section, | |
803 | unsigned section_line, | |
804 | const char *lvalue, | |
805 | int ltype, | |
806 | const char *rvalue, | |
807 | void *data, | |
808 | void *userdata) { | |
809 | ||
810 | usec_t t, *usec = ASSERT_PTR(data); | |
811 | int r; | |
812 | ||
813 | assert(filename); | |
814 | assert(section); | |
815 | assert(lvalue); | |
816 | assert(rvalue); | |
817 | ||
818 | if (isempty(rvalue)) { | |
819 | *usec = 0; | |
820 | return 0; | |
821 | } | |
822 | ||
823 | r = parse_sec(rvalue, &t); | |
824 | if (r < 0) { | |
825 | log_syntax(unit, LOG_WARNING, filename, line, r, | |
826 | "Failed to parse [%s] %s=, ignoring assignment: %s", section, lvalue, rvalue); | |
827 | return 0; | |
828 | } | |
829 | ||
830 | if (t < MIN_V6ONLY_WAIT_USEC && !network_test_mode_enabled()) { | |
831 | log_syntax(unit, LOG_WARNING, filename, line, 0, | |
832 | "Invalid [%s] %s=, ignoring assignment: %s", section, lvalue, rvalue); | |
833 | return 0; | |
834 | } | |
835 | ||
836 | *usec = t; | |
837 | return 0; | |
838 | } |