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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
a13c50e7 | 2 | /*** |
810adae9 | 3 | Copyright © 2014 Intel Corporation. All rights reserved. |
a13c50e7 TG |
4 | ***/ |
5 | ||
9d96e6c3 | 6 | #include <netinet/icmp6.h> |
23f53b99 | 7 | #include <arpa/inet.h> |
a13c50e7 | 8 | |
a13c50e7 TG |
9 | #include "sd-ndisc.h" |
10 | ||
d909e4af | 11 | #include "missing_network.h" |
ca5ad760 | 12 | #include "networkd-dhcp6.h" |
73854ba1 | 13 | #include "networkd-manager.h" |
1e7a0e21 | 14 | #include "networkd-ndisc.h" |
23f53b99 | 15 | #include "networkd-route.h" |
ac24e418 | 16 | #include "string-table.h" |
5f506a55 | 17 | #include "string-util.h" |
51517f9e | 18 | #include "strv.h" |
1e7a0e21 LP |
19 | |
20 | #define NDISC_DNSSL_MAX 64U | |
21 | #define NDISC_RDNSS_MAX 64U | |
6554550f | 22 | #define NDISC_PREFIX_LFT_MIN 7200U |
fe307276 | 23 | |
5f506a55 SS |
24 | #define DAD_CONFLICTS_IDGEN_RETRIES_RFC7217 3 |
25 | ||
26 | /* https://tools.ietf.org/html/rfc5453 */ | |
27 | /* https://www.iana.org/assignments/ipv6-interface-ids/ipv6-interface-ids.xml */ | |
28 | ||
29 | #define SUBNET_ROUTER_ANYCAST_ADDRESS_RFC4291 ((struct in6_addr) { .s6_addr = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } }) | |
30 | #define SUBNET_ROUTER_ANYCAST_PREFIXLEN 8 | |
31 | #define RESERVED_IPV6_INTERFACE_IDENTIFIERS_ADDRESS_RFC4291 ((struct in6_addr) { .s6_addr = { 0x02, 0x00, 0x5E, 0xFF, 0xFE } }) | |
32 | #define RESERVED_IPV6_INTERFACE_IDENTIFIERS_PREFIXLEN 5 | |
33 | #define RESERVED_SUBNET_ANYCAST_ADDRESSES_RFC4291 ((struct in6_addr) { .s6_addr = { 0xFD, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF } }) | |
34 | #define RESERVED_SUBNET_ANYCAST_PREFIXLEN 7 | |
35 | ||
36 | #define NDISC_APP_ID SD_ID128_MAKE(13,ac,81,a7,d5,3f,49,78,92,79,5d,0c,29,3a,bc,7e) | |
37 | ||
38 | static bool stableprivate_address_is_valid(const struct in6_addr *addr) { | |
39 | assert(addr); | |
40 | ||
41 | /* According to rfc4291, generated address should not be in the following ranges. */ | |
42 | ||
43 | if (memcmp(addr, &SUBNET_ROUTER_ANYCAST_ADDRESS_RFC4291, SUBNET_ROUTER_ANYCAST_PREFIXLEN) == 0) | |
44 | return false; | |
45 | ||
46 | if (memcmp(addr, &RESERVED_IPV6_INTERFACE_IDENTIFIERS_ADDRESS_RFC4291, RESERVED_IPV6_INTERFACE_IDENTIFIERS_PREFIXLEN) == 0) | |
47 | return false; | |
48 | ||
49 | if (memcmp(addr, &RESERVED_SUBNET_ANYCAST_ADDRESSES_RFC4291, RESERVED_SUBNET_ANYCAST_PREFIXLEN) == 0) | |
50 | return false; | |
51 | ||
52 | return true; | |
53 | } | |
54 | ||
55 | static int make_stableprivate_address(Link *link, const struct in6_addr *prefix, uint8_t prefix_len, uint8_t dad_counter, struct in6_addr *addr) { | |
56 | sd_id128_t secret_key; | |
57 | struct siphash state; | |
58 | uint64_t rid; | |
59 | size_t l; | |
60 | int r; | |
61 | ||
62 | /* According to rfc7217 section 5.1 | |
63 | * RID = F(Prefix, Net_Iface, Network_ID, DAD_Counter, secret_key) */ | |
64 | ||
65 | r = sd_id128_get_machine_app_specific(NDISC_APP_ID, &secret_key); | |
66 | if (r < 0) | |
67 | return log_error_errno(r, "Failed to generate key: %m"); | |
68 | ||
69 | siphash24_init(&state, secret_key.bytes); | |
70 | ||
71 | l = MAX(DIV_ROUND_UP(prefix_len, 8), 8); | |
72 | siphash24_compress(prefix, l, &state); | |
f281fc1e | 73 | siphash24_compress_string(link->ifname, &state); |
5f506a55 SS |
74 | siphash24_compress(&link->mac, sizeof(struct ether_addr), &state); |
75 | siphash24_compress(&dad_counter, sizeof(uint8_t), &state); | |
76 | ||
77 | rid = htole64(siphash24_finalize(&state)); | |
78 | ||
79 | memcpy(addr->s6_addr, prefix->s6_addr, l); | |
845d784e | 80 | memcpy(addr->s6_addr + l, &rid, 16 - l); |
5f506a55 SS |
81 | |
82 | return 0; | |
83 | } | |
84 | ||
d98c546d | 85 | static int ndisc_route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
3b015d40 TG |
86 | int r; |
87 | ||
88 | assert(link); | |
d98c546d | 89 | assert(link->ndisc_routes_messages > 0); |
3b015d40 | 90 | |
d98c546d | 91 | link->ndisc_routes_messages--; |
3b015d40 | 92 | |
4ff296b0 YW |
93 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
94 | return 1; | |
95 | ||
3b015d40 | 96 | r = sd_netlink_message_get_errno(m); |
4ff296b0 | 97 | if (r < 0 && r != -EEXIST) { |
d98c546d | 98 | log_link_message_error_errno(link, m, r, "Could not set NDisc route"); |
4ff296b0 YW |
99 | link_enter_failed(link); |
100 | return 1; | |
101 | } | |
3b015d40 | 102 | |
d98c546d YW |
103 | if (link->ndisc_routes_messages == 0) { |
104 | log_link_debug(link, "NDisc routes set."); | |
105 | link->ndisc_routes_configured = true; | |
3b015d40 TG |
106 | link_check_ready(link); |
107 | } | |
108 | ||
109 | return 1; | |
110 | } | |
111 | ||
d98c546d | 112 | static int ndisc_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
73854ba1 YW |
113 | int r; |
114 | ||
115 | assert(link); | |
d98c546d | 116 | assert(link->ndisc_addresses_messages > 0); |
73854ba1 | 117 | |
d98c546d | 118 | link->ndisc_addresses_messages--; |
73854ba1 | 119 | |
4ff296b0 YW |
120 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
121 | return 1; | |
122 | ||
73854ba1 | 123 | r = sd_netlink_message_get_errno(m); |
4ff296b0 | 124 | if (r < 0 && r != -EEXIST) { |
d98c546d | 125 | log_link_message_error_errno(link, m, r, "Could not set NDisc address"); |
4ff296b0 YW |
126 | link_enter_failed(link); |
127 | return 1; | |
128 | } else if (r >= 0) | |
129 | (void) manager_rtnl_process_address(rtnl, m, link->manager); | |
73854ba1 | 130 | |
d98c546d YW |
131 | if (link->ndisc_addresses_messages == 0) { |
132 | log_link_debug(link, "NDisc SLAAC addresses set."); | |
133 | link->ndisc_addresses_configured = true; | |
4ff296b0 YW |
134 | r = link_request_set_routes(link); |
135 | if (r < 0) { | |
136 | link_enter_failed(link); | |
137 | return 1; | |
138 | } | |
73854ba1 YW |
139 | } |
140 | ||
141 | return 1; | |
142 | } | |
143 | ||
d5017c84 | 144 | static int ndisc_router_process_default(Link *link, sd_ndisc_router *rt) { |
8e766630 | 145 | _cleanup_(route_freep) Route *route = NULL; |
ce2ea782 | 146 | union in_addr_union gateway; |
1e7a0e21 LP |
147 | uint16_t lifetime; |
148 | unsigned preference; | |
d6fceaf1 | 149 | uint32_t mtu; |
3b015d40 | 150 | usec_t time_now; |
13e8a49a | 151 | int r; |
3b015d40 | 152 | |
3b015d40 | 153 | assert(link); |
1e7a0e21 | 154 | assert(rt); |
3b015d40 | 155 | |
1e7a0e21 | 156 | r = sd_ndisc_router_get_lifetime(rt, &lifetime); |
d5017c84 | 157 | if (r < 0) |
13e8a49a | 158 | return log_link_error_errno(link, r, "Failed to get gateway lifetime from RA: %m"); |
d5017c84 | 159 | |
1e7a0e21 | 160 | if (lifetime == 0) /* not a default router */ |
d5017c84 | 161 | return 0; |
1e7a0e21 | 162 | |
ce2ea782 | 163 | r = sd_ndisc_router_get_address(rt, &gateway.in6); |
d5017c84 | 164 | if (r < 0) |
13e8a49a | 165 | return log_link_error_errno(link, r, "Failed to get gateway address from RA: %m"); |
1e7a0e21 | 166 | |
5eec0a08 YW |
167 | if (address_exists(link, AF_INET6, &gateway)) { |
168 | if (DEBUG_LOGGING) { | |
169 | _cleanup_free_ char *buffer = NULL; | |
6d7c7615 | 170 | |
5eec0a08 YW |
171 | (void) in_addr_to_string(AF_INET6, &gateway, &buffer); |
172 | log_link_debug(link, "No NDisc route added, gateway %s matches local address", | |
173 | strnull(buffer)); | |
6d7c7615 | 174 | } |
5eec0a08 | 175 | return 0; |
ce2ea782 | 176 | } |
6d7c7615 | 177 | |
1e7a0e21 | 178 | r = sd_ndisc_router_get_preference(rt, &preference); |
d5017c84 | 179 | if (r < 0) |
13e8a49a | 180 | return log_link_error_errno(link, r, "Failed to get default router preference from RA: %m"); |
1e7a0e21 LP |
181 | |
182 | r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now); | |
d5017c84 | 183 | if (r < 0) |
13e8a49a | 184 | return log_link_error_errno(link, r, "Failed to get RA timestamp: %m"); |
1e7a0e21 | 185 | |
d6fceaf1 | 186 | r = sd_ndisc_router_get_mtu(rt, &mtu); |
29b5ad08 JT |
187 | if (r == -ENODATA) |
188 | mtu = 0; | |
d5017c84 | 189 | else if (r < 0) |
13e8a49a | 190 | return log_link_error_errno(link, r, "Failed to get default router MTU from RA: %m"); |
d6fceaf1 | 191 | |
1e7a0e21 | 192 | r = route_new(&route); |
d5017c84 | 193 | if (r < 0) |
13e8a49a | 194 | return log_oom(); |
1e7a0e21 LP |
195 | |
196 | route->family = AF_INET6; | |
bdb9f580 | 197 | route->table = link_get_ipv6_accept_ra_route_table(link); |
1bf1bfd9 | 198 | route->priority = link->network->dhcp6_route_metric; |
1e7a0e21 LP |
199 | route->protocol = RTPROT_RA; |
200 | route->pref = preference; | |
ce2ea782 | 201 | route->gw = gateway; |
1e7a0e21 | 202 | route->lifetime = time_now + lifetime * USEC_PER_SEC; |
d6fceaf1 | 203 | route->mtu = mtu; |
1e7a0e21 | 204 | |
d98c546d | 205 | r = route_configure(route, link, ndisc_route_handler); |
13e8a49a YW |
206 | if (r < 0) |
207 | return log_link_error_errno(link, r, "Could not set default route: %m"); | |
c4423317 | 208 | if (r > 0) |
d98c546d | 209 | link->ndisc_routes_messages++; |
d5017c84 | 210 | |
1985c54f YW |
211 | Route *route_gw; |
212 | LIST_FOREACH(routes, route_gw, link->network->static_routes) { | |
213 | if (!route_gw->gateway_from_dhcp) | |
214 | continue; | |
215 | ||
216 | if (route_gw->family != AF_INET6) | |
217 | continue; | |
218 | ||
219 | route_gw->gw = gateway; | |
220 | ||
d98c546d | 221 | r = route_configure(route_gw, link, ndisc_route_handler); |
13e8a49a YW |
222 | if (r < 0) |
223 | return log_link_error_errno(link, r, "Could not set gateway: %m"); | |
1985c54f | 224 | if (r > 0) |
d98c546d | 225 | link->ndisc_routes_messages++; |
1985c54f YW |
226 | } |
227 | ||
d5017c84 | 228 | return 0; |
1e7a0e21 LP |
229 | } |
230 | ||
c24c83dc KF |
231 | static int ndisc_router_generate_addresses(Link *link, unsigned prefixlen, uint32_t lifetime_preferred, Address *address, Set **ret) { |
232 | _cleanup_set_free_free_ Set *addresses = NULL; | |
5f506a55 SS |
233 | struct in6_addr addr; |
234 | IPv6Token *j; | |
235 | Iterator i; | |
236 | int r; | |
237 | ||
5f506a55 | 238 | assert(link); |
c24c83dc KF |
239 | assert(address); |
240 | assert(ret); | |
241 | ||
242 | addresses = set_new(&address_hash_ops); | |
243 | if (!addresses) | |
244 | return log_oom(); | |
5f506a55 SS |
245 | |
246 | addr = address->in_addr.in6; | |
c24c83dc KF |
247 | ORDERED_HASHMAP_FOREACH(j, link->network->ipv6_tokens, i) { |
248 | bool have_address = false; | |
249 | _cleanup_(address_freep) Address *new_address = NULL; | |
250 | ||
251 | r = address_new(&new_address); | |
252 | if (r < 0) | |
253 | return log_oom(); | |
254 | ||
255 | *new_address = *address; | |
256 | ||
5f506a55 SS |
257 | if (j->address_generation_type == IPV6_TOKEN_ADDRESS_GENERATION_PREFIXSTABLE |
258 | && memcmp(&j->prefix, &addr, FAMILY_ADDRESS_SIZE(address->family)) == 0) { | |
0ddad04e KF |
259 | /* While this loop uses dad_counter and a retry limit as specified in RFC 7217, the loop |
260 | does not actually attempt Duplicate Address Detection; the counter will be incremented | |
261 | only when the address generation algorithm produces an invalid address, and the loop | |
262 | may exit with an address which ends up being unusable due to duplication on the link. | |
263 | */ | |
5f506a55 | 264 | for (; j->dad_counter < DAD_CONFLICTS_IDGEN_RETRIES_RFC7217; j->dad_counter++) { |
c24c83dc | 265 | r = make_stableprivate_address(link, &j->prefix, prefixlen, j->dad_counter, &new_address->in_addr.in6); |
5f506a55 | 266 | if (r < 0) |
c24c83dc | 267 | break; |
5f506a55 | 268 | |
c24c83dc | 269 | if (stableprivate_address_is_valid(&new_address->in_addr.in6)) { |
87f9d6ea | 270 | have_address = true; |
5f506a55 SS |
271 | break; |
272 | } | |
273 | } | |
e2c4070e | 274 | } else if (j->address_generation_type == IPV6_TOKEN_ADDRESS_GENERATION_STATIC) { |
845d784e | 275 | memcpy(new_address->in_addr.in6.s6_addr + 8, j->prefix.s6_addr + 8, 8); |
87f9d6ea | 276 | have_address = true; |
5f506a55 SS |
277 | } |
278 | ||
c24c83dc KF |
279 | if (have_address) { |
280 | new_address->prefixlen = prefixlen; | |
281 | new_address->flags = IFA_F_NOPREFIXROUTE|IFA_F_MANAGETEMPADDR; | |
282 | new_address->cinfo.ifa_prefered = lifetime_preferred; | |
283 | ||
284 | r = set_put(addresses, new_address); | |
285 | if (r < 0) | |
13e8a49a | 286 | return log_link_error_errno(link, r, "Failed to store SLAAC address: %m"); |
c24c83dc KF |
287 | TAKE_PTR(new_address); |
288 | } | |
289 | } | |
290 | ||
291 | /* fall back to EUI-64 if no tokens provided addresses */ | |
292 | if (set_isempty(addresses)) { | |
293 | _cleanup_(address_freep) Address *new_address = NULL; | |
294 | ||
295 | r = address_new(&new_address); | |
296 | if (r < 0) | |
297 | return log_oom(); | |
298 | ||
299 | *new_address = *address; | |
300 | ||
a781ddef SS |
301 | r = generate_ipv6_eui_64_address(link, &new_address->in_addr.in6); |
302 | if (r < 0) | |
303 | return log_link_error_errno(link, r, "Failed to generate EUI64 address: %m"); | |
304 | ||
c24c83dc KF |
305 | new_address->prefixlen = prefixlen; |
306 | new_address->flags = IFA_F_NOPREFIXROUTE|IFA_F_MANAGETEMPADDR; | |
307 | new_address->cinfo.ifa_prefered = lifetime_preferred; | |
308 | ||
309 | r = set_put(addresses, new_address); | |
310 | if (r < 0) | |
13e8a49a | 311 | return log_link_error_errno(link, r, "Failed to store SLAAC address: %m"); |
c24c83dc | 312 | TAKE_PTR(new_address); |
5f506a55 SS |
313 | } |
314 | ||
c24c83dc | 315 | *ret = TAKE_PTR(addresses); |
5f506a55 SS |
316 | |
317 | return 0; | |
318 | } | |
c24c83dc | 319 | |
d5017c84 | 320 | static int ndisc_router_process_autonomous_prefix(Link *link, sd_ndisc_router *rt) { |
5f506a55 | 321 | uint32_t lifetime_valid, lifetime_preferred, lifetime_remaining; |
c24c83dc | 322 | _cleanup_set_free_free_ Set *addresses = NULL; |
8e766630 | 323 | _cleanup_(address_freep) Address *address = NULL; |
1e7a0e21 | 324 | unsigned prefixlen; |
5f506a55 | 325 | usec_t time_now; |
13e8a49a | 326 | Address *a; |
c24c83dc | 327 | Iterator i; |
1e7a0e21 LP |
328 | int r; |
329 | ||
330 | assert(link); | |
331 | assert(rt); | |
332 | ||
6554550f | 333 | r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now); |
d5017c84 | 334 | if (r < 0) |
13e8a49a | 335 | return log_link_error_errno(link, r, "Failed to get RA timestamp: %m"); |
6554550f | 336 | |
1e7a0e21 | 337 | r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen); |
d5017c84 YW |
338 | if (r < 0) |
339 | return log_link_error_errno(link, r, "Failed to get prefix length: %m"); | |
1e7a0e21 LP |
340 | |
341 | r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime_valid); | |
d5017c84 YW |
342 | if (r < 0) |
343 | return log_link_error_errno(link, r, "Failed to get prefix valid lifetime: %m"); | |
1e7a0e21 LP |
344 | |
345 | r = sd_ndisc_router_prefix_get_preferred_lifetime(rt, &lifetime_preferred); | |
d5017c84 YW |
346 | if (r < 0) |
347 | return log_link_error_errno(link, r, "Failed to get prefix preferred lifetime: %m"); | |
3b015d40 | 348 | |
92bdc3ff SS |
349 | /* The preferred lifetime is never greater than the valid lifetime */ |
350 | if (lifetime_preferred > lifetime_valid) | |
d5017c84 | 351 | return 0; |
92bdc3ff | 352 | |
3b015d40 | 353 | r = address_new(&address); |
d5017c84 | 354 | if (r < 0) |
13e8a49a | 355 | return log_oom(); |
3b015d40 | 356 | |
3b015d40 | 357 | address->family = AF_INET6; |
1e7a0e21 | 358 | r = sd_ndisc_router_prefix_get_address(rt, &address->in_addr.in6); |
d5017c84 YW |
359 | if (r < 0) |
360 | return log_link_error_errno(link, r, "Failed to get prefix address: %m"); | |
1e7a0e21 | 361 | |
c24c83dc | 362 | r = ndisc_router_generate_addresses(link, prefixlen, lifetime_preferred, address, &addresses); |
5f506a55 | 363 | if (r < 0) |
13e8a49a | 364 | return r; |
c24c83dc KF |
365 | |
366 | SET_FOREACH(a, addresses, i) { | |
13e8a49a YW |
367 | Address *existing_address; |
368 | ||
c24c83dc KF |
369 | /* see RFC4862 section 5.5.3.e */ |
370 | r = address_get(link, a->family, &a->in_addr, a->prefixlen, &existing_address); | |
371 | if (r > 0) { | |
372 | lifetime_remaining = existing_address->cinfo.tstamp / 100 + existing_address->cinfo.ifa_valid - time_now / USEC_PER_SEC; | |
373 | if (lifetime_valid > NDISC_PREFIX_LFT_MIN || lifetime_valid > lifetime_remaining) | |
374 | a->cinfo.ifa_valid = lifetime_valid; | |
375 | else if (lifetime_remaining <= NDISC_PREFIX_LFT_MIN) | |
376 | a->cinfo.ifa_valid = lifetime_remaining; | |
377 | else | |
378 | a->cinfo.ifa_valid = NDISC_PREFIX_LFT_MIN; | |
379 | } else if (lifetime_valid > 0) | |
380 | a->cinfo.ifa_valid = lifetime_valid; | |
6554550f | 381 | else |
01c344bd | 382 | continue; /* see RFC4862 section 5.5.3.d */ |
6554550f | 383 | |
c24c83dc KF |
384 | if (a->cinfo.ifa_valid == 0) |
385 | continue; | |
3b015d40 | 386 | |
d98c546d | 387 | r = address_configure(a, link, ndisc_address_handler, true); |
13e8a49a YW |
388 | if (r < 0) |
389 | return log_link_error_errno(link, r, "Could not set SLAAC address: %m"); | |
c24c83dc | 390 | if (r > 0) |
d98c546d | 391 | link->ndisc_addresses_messages++; |
3b015d40 | 392 | } |
d5017c84 YW |
393 | |
394 | return 0; | |
3b015d40 TG |
395 | } |
396 | ||
d5017c84 | 397 | static int ndisc_router_process_onlink_prefix(Link *link, sd_ndisc_router *rt) { |
8e766630 | 398 | _cleanup_(route_freep) Route *route = NULL; |
3b015d40 | 399 | usec_t time_now; |
1e7a0e21 LP |
400 | uint32_t lifetime; |
401 | unsigned prefixlen; | |
3b015d40 TG |
402 | int r; |
403 | ||
3b015d40 | 404 | assert(link); |
1e7a0e21 | 405 | assert(rt); |
3b015d40 | 406 | |
1e7a0e21 | 407 | r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now); |
d5017c84 | 408 | if (r < 0) |
13e8a49a | 409 | return log_link_error_errno(link, r, "Failed to get RA timestamp: %m"); |
1e7a0e21 LP |
410 | |
411 | r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen); | |
d5017c84 YW |
412 | if (r < 0) |
413 | return log_link_error_errno(link, r, "Failed to get prefix length: %m"); | |
1e7a0e21 LP |
414 | |
415 | r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime); | |
d5017c84 YW |
416 | if (r < 0) |
417 | return log_link_error_errno(link, r, "Failed to get prefix lifetime: %m"); | |
3b015d40 TG |
418 | |
419 | r = route_new(&route); | |
d5017c84 | 420 | if (r < 0) |
13e8a49a | 421 | return log_oom(); |
3b015d40 | 422 | |
3b015d40 | 423 | route->family = AF_INET6; |
bdb9f580 | 424 | route->table = link_get_ipv6_accept_ra_route_table(link); |
1bf1bfd9 | 425 | route->priority = link->network->dhcp6_route_metric; |
3b015d40 TG |
426 | route->protocol = RTPROT_RA; |
427 | route->flags = RTM_F_PREFIX; | |
3b015d40 TG |
428 | route->dst_prefixlen = prefixlen; |
429 | route->lifetime = time_now + lifetime * USEC_PER_SEC; | |
430 | ||
1e7a0e21 | 431 | r = sd_ndisc_router_prefix_get_address(rt, &route->dst.in6); |
d5017c84 YW |
432 | if (r < 0) |
433 | return log_link_error_errno(link, r, "Failed to get prefix address: %m"); | |
1e7a0e21 | 434 | |
d98c546d | 435 | r = route_configure(route, link, ndisc_route_handler); |
13e8a49a YW |
436 | if (r < 0) |
437 | return log_link_error_errno(link, r, "Could not set prefix route: %m");; | |
c4423317 | 438 | if (r > 0) |
d98c546d | 439 | link->ndisc_routes_messages++; |
d5017c84 YW |
440 | |
441 | return 0; | |
3b015d40 TG |
442 | } |
443 | ||
d5017c84 | 444 | static int ndisc_router_process_route(Link *link, sd_ndisc_router *rt) { |
8e766630 | 445 | _cleanup_(route_freep) Route *route = NULL; |
1e7a0e21 LP |
446 | struct in6_addr gateway; |
447 | uint32_t lifetime; | |
448 | unsigned preference, prefixlen; | |
fe307276 | 449 | usec_t time_now; |
7a695d8e | 450 | int r; |
a13c50e7 TG |
451 | |
452 | assert(link); | |
a13c50e7 | 453 | |
1e7a0e21 | 454 | r = sd_ndisc_router_route_get_lifetime(rt, &lifetime); |
d5017c84 | 455 | if (r < 0) |
13e8a49a | 456 | return log_link_error_errno(link, r, "Failed to get gateway lifetime from RA: %m"); |
d5017c84 | 457 | |
1e7a0e21 | 458 | if (lifetime == 0) |
d5017c84 | 459 | return 0; |
a13c50e7 | 460 | |
1e7a0e21 | 461 | r = sd_ndisc_router_get_address(rt, &gateway); |
d5017c84 | 462 | if (r < 0) |
13e8a49a | 463 | return log_link_error_errno(link, r, "Failed to get gateway address from RA: %m"); |
3b015d40 | 464 | |
1e7a0e21 | 465 | r = sd_ndisc_router_route_get_prefixlen(rt, &prefixlen); |
d5017c84 | 466 | if (r < 0) |
13e8a49a | 467 | return log_link_error_errno(link, r, "Failed to get route prefix length: %m"); |
1e7a0e21 LP |
468 | |
469 | r = sd_ndisc_router_route_get_preference(rt, &preference); | |
d5017c84 | 470 | if (r < 0) |
13e8a49a | 471 | return log_link_error_errno(link, r, "Failed to get default router preference from RA: %m"); |
1e7a0e21 LP |
472 | |
473 | r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now); | |
d5017c84 | 474 | if (r < 0) |
13e8a49a | 475 | return log_link_error_errno(link, r, "Failed to get RA timestamp: %m"); |
3b015d40 TG |
476 | |
477 | r = route_new(&route); | |
d5017c84 | 478 | if (r < 0) |
13e8a49a | 479 | return log_oom(); |
3b015d40 | 480 | |
3b015d40 | 481 | route->family = AF_INET6; |
bdb9f580 | 482 | route->table = link_get_ipv6_accept_ra_route_table(link); |
1bf1bfd9 | 483 | route->priority = link->network->dhcp6_route_metric; |
3b015d40 | 484 | route->protocol = RTPROT_RA; |
1e7a0e21 LP |
485 | route->pref = preference; |
486 | route->gw.in6 = gateway; | |
487 | route->dst_prefixlen = prefixlen; | |
3b015d40 TG |
488 | route->lifetime = time_now + lifetime * USEC_PER_SEC; |
489 | ||
1e7a0e21 | 490 | r = sd_ndisc_router_route_get_address(rt, &route->dst.in6); |
d5017c84 YW |
491 | if (r < 0) |
492 | return log_link_error_errno(link, r, "Failed to get route address: %m"); | |
1e7a0e21 | 493 | |
d98c546d | 494 | r = route_configure(route, link, ndisc_route_handler); |
13e8a49a YW |
495 | if (r < 0) |
496 | return log_link_error_errno(link, r, "Could not set additional route: %m"); | |
c4423317 | 497 | if (r > 0) |
d98c546d | 498 | link->ndisc_routes_messages++; |
d5017c84 YW |
499 | |
500 | return 0; | |
9d96e6c3 | 501 | } |
a13c50e7 | 502 | |
7a08d314 | 503 | static void ndisc_rdnss_hash_func(const NDiscRDNSS *x, struct siphash *state) { |
1e7a0e21 LP |
504 | siphash24_compress(&x->address, sizeof(x->address), state); |
505 | } | |
506 | ||
7a08d314 | 507 | static int ndisc_rdnss_compare_func(const NDiscRDNSS *a, const NDiscRDNSS *b) { |
1e7a0e21 LP |
508 | return memcmp(&a->address, &b->address, sizeof(a->address)); |
509 | } | |
510 | ||
7a08d314 | 511 | DEFINE_PRIVATE_HASH_OPS(ndisc_rdnss_hash_ops, NDiscRDNSS, ndisc_rdnss_hash_func, ndisc_rdnss_compare_func); |
1e7a0e21 | 512 | |
d5017c84 | 513 | static int ndisc_router_process_rdnss(Link *link, sd_ndisc_router *rt) { |
1e7a0e21 LP |
514 | uint32_t lifetime; |
515 | const struct in6_addr *a; | |
516 | usec_t time_now; | |
13e8a49a | 517 | int n, r; |
1e7a0e21 LP |
518 | |
519 | assert(link); | |
520 | assert(rt); | |
521 | ||
522 | r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now); | |
d5017c84 | 523 | if (r < 0) |
13e8a49a | 524 | return log_link_error_errno(link, r, "Failed to get RA timestamp: %m"); |
1e7a0e21 LP |
525 | |
526 | r = sd_ndisc_router_rdnss_get_lifetime(rt, &lifetime); | |
d5017c84 | 527 | if (r < 0) |
13e8a49a | 528 | return log_link_error_errno(link, r, "Failed to get RDNSS lifetime: %m"); |
1e7a0e21 LP |
529 | |
530 | n = sd_ndisc_router_rdnss_get_addresses(rt, &a); | |
d5017c84 | 531 | if (n < 0) |
13e8a49a | 532 | return log_link_error_errno(link, n, "Failed to get RDNSS addresses: %m"); |
1e7a0e21 | 533 | |
13e8a49a | 534 | for (int i = 0; i < n; i++) { |
d5017c84 | 535 | _cleanup_free_ NDiscRDNSS *x = NULL; |
1e7a0e21 | 536 | NDiscRDNSS d = { |
d5017c84 YW |
537 | .address = a[i], |
538 | }, *y; | |
1e7a0e21 LP |
539 | |
540 | if (lifetime == 0) { | |
541 | (void) set_remove(link->ndisc_rdnss, &d); | |
542 | link_dirty(link); | |
543 | continue; | |
544 | } | |
545 | ||
d5017c84 YW |
546 | y = set_get(link->ndisc_rdnss, &d); |
547 | if (y) { | |
548 | y->valid_until = time_now + lifetime * USEC_PER_SEC; | |
1e7a0e21 LP |
549 | continue; |
550 | } | |
551 | ||
552 | ndisc_vacuum(link); | |
553 | ||
554 | if (set_size(link->ndisc_rdnss) >= NDISC_RDNSS_MAX) { | |
555 | log_link_warning(link, "Too many RDNSS records per link, ignoring."); | |
556 | continue; | |
557 | } | |
558 | ||
d5017c84 YW |
559 | x = new(NDiscRDNSS, 1); |
560 | if (!x) | |
561 | return log_oom(); | |
1e7a0e21 | 562 | |
d5017c84 YW |
563 | *x = (NDiscRDNSS) { |
564 | .address = a[i], | |
565 | .valid_until = time_now + lifetime * USEC_PER_SEC, | |
566 | }; | |
1e7a0e21 | 567 | |
35e601d4 | 568 | r = set_ensure_consume(&link->ndisc_rdnss, &ndisc_rdnss_hash_ops, TAKE_PTR(x)); |
d5017c84 YW |
569 | if (r < 0) |
570 | return log_oom(); | |
1e7a0e21 | 571 | assert(r > 0); |
35e601d4 | 572 | |
1e7a0e21 LP |
573 | link_dirty(link); |
574 | } | |
d5017c84 YW |
575 | |
576 | return 0; | |
1e7a0e21 LP |
577 | } |
578 | ||
7a08d314 | 579 | static void ndisc_dnssl_hash_func(const NDiscDNSSL *x, struct siphash *state) { |
f281fc1e | 580 | siphash24_compress_string(NDISC_DNSSL_DOMAIN(x), state); |
1e7a0e21 LP |
581 | } |
582 | ||
7a08d314 | 583 | static int ndisc_dnssl_compare_func(const NDiscDNSSL *a, const NDiscDNSSL *b) { |
1e7a0e21 LP |
584 | return strcmp(NDISC_DNSSL_DOMAIN(a), NDISC_DNSSL_DOMAIN(b)); |
585 | } | |
586 | ||
7a08d314 | 587 | DEFINE_PRIVATE_HASH_OPS(ndisc_dnssl_hash_ops, NDiscDNSSL, ndisc_dnssl_hash_func, ndisc_dnssl_compare_func); |
1e7a0e21 | 588 | |
13e8a49a | 589 | static int ndisc_router_process_dnssl(Link *link, sd_ndisc_router *rt) { |
1e7a0e21 LP |
590 | _cleanup_strv_free_ char **l = NULL; |
591 | uint32_t lifetime; | |
592 | usec_t time_now; | |
593 | char **i; | |
594 | int r; | |
595 | ||
596 | assert(link); | |
597 | assert(rt); | |
598 | ||
599 | r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now); | |
13e8a49a YW |
600 | if (r < 0) |
601 | return log_link_error_errno(link, r, "Failed to get RA timestamp: %m"); | |
1e7a0e21 LP |
602 | |
603 | r = sd_ndisc_router_dnssl_get_lifetime(rt, &lifetime); | |
13e8a49a YW |
604 | if (r < 0) |
605 | return log_link_error_errno(link, r, "Failed to get DNSSL lifetime: %m"); | |
1e7a0e21 LP |
606 | |
607 | r = sd_ndisc_router_dnssl_get_domains(rt, &l); | |
13e8a49a YW |
608 | if (r < 0) |
609 | return log_link_error_errno(link, r, "Failed to get DNSSL addresses: %m"); | |
1e7a0e21 LP |
610 | |
611 | STRV_FOREACH(i, l) { | |
13e8a49a | 612 | _cleanup_free_ NDiscDNSSL *s = NULL; |
1e7a0e21 LP |
613 | NDiscDNSSL *x; |
614 | ||
a34349e7 | 615 | s = malloc0(ALIGN(sizeof(NDiscDNSSL)) + strlen(*i) + 1); |
13e8a49a YW |
616 | if (!s) |
617 | return log_oom(); | |
a34349e7 DM |
618 | |
619 | strcpy(NDISC_DNSSL_DOMAIN(s), *i); | |
1e7a0e21 LP |
620 | |
621 | if (lifetime == 0) { | |
a34349e7 | 622 | (void) set_remove(link->ndisc_dnssl, s); |
1e7a0e21 LP |
623 | link_dirty(link); |
624 | continue; | |
625 | } | |
626 | ||
a34349e7 | 627 | x = set_get(link->ndisc_dnssl, s); |
1e7a0e21 LP |
628 | if (x) { |
629 | x->valid_until = time_now + lifetime * USEC_PER_SEC; | |
630 | continue; | |
631 | } | |
632 | ||
633 | ndisc_vacuum(link); | |
634 | ||
635 | if (set_size(link->ndisc_dnssl) >= NDISC_DNSSL_MAX) { | |
636 | log_link_warning(link, "Too many DNSSL records per link, ignoring."); | |
637 | continue; | |
638 | } | |
639 | ||
a34349e7 | 640 | s->valid_until = time_now + lifetime * USEC_PER_SEC; |
1e7a0e21 | 641 | |
35e601d4 | 642 | r = set_ensure_consume(&link->ndisc_dnssl, &ndisc_dnssl_hash_ops, TAKE_PTR(s)); |
13e8a49a YW |
643 | if (r < 0) |
644 | return log_oom(); | |
1e7a0e21 | 645 | assert(r > 0); |
de7fef4b | 646 | |
1e7a0e21 LP |
647 | link_dirty(link); |
648 | } | |
13e8a49a YW |
649 | |
650 | return 0; | |
1e7a0e21 LP |
651 | } |
652 | ||
e8c9b5b0 | 653 | static int ndisc_router_process_options(Link *link, sd_ndisc_router *rt) { |
1e7a0e21 | 654 | assert(link); |
55d3fdcf | 655 | assert(link->network); |
1e7a0e21 LP |
656 | assert(rt); |
657 | ||
13e8a49a | 658 | for (int r = sd_ndisc_router_option_rewind(rt); ; r = sd_ndisc_router_option_next(rt)) { |
1e7a0e21 LP |
659 | uint8_t type; |
660 | ||
e8c9b5b0 | 661 | if (r < 0) |
13e8a49a | 662 | return log_link_error_errno(link, r, "Failed to iterate through options: %m"); |
1e7a0e21 | 663 | if (r == 0) /* EOF */ |
13e8a49a | 664 | return 0; |
1e7a0e21 LP |
665 | |
666 | r = sd_ndisc_router_option_get_type(rt, &type); | |
e8c9b5b0 | 667 | if (r < 0) |
13e8a49a | 668 | return log_link_error_errno(link, r, "Failed to get RA option type: %m"); |
1e7a0e21 LP |
669 | |
670 | switch (type) { | |
671 | ||
672 | case SD_NDISC_OPTION_PREFIX_INFORMATION: { | |
55d3fdcf | 673 | union in_addr_union a; |
1e7a0e21 LP |
674 | uint8_t flags; |
675 | ||
55d3fdcf YW |
676 | r = sd_ndisc_router_prefix_get_address(rt, &a.in6); |
677 | if (r < 0) | |
678 | return log_link_error_errno(link, r, "Failed to get prefix address: %m"); | |
679 | ||
6b000af4 | 680 | if (set_contains(link->network->ndisc_deny_listed_prefix, &a.in6)) { |
55d3fdcf YW |
681 | if (DEBUG_LOGGING) { |
682 | _cleanup_free_ char *b = NULL; | |
683 | ||
684 | (void) in_addr_to_string(AF_INET6, &a, &b); | |
6b000af4 | 685 | log_link_debug(link, "Prefix '%s' is deny-listed, ignoring", strna(b)); |
55d3fdcf | 686 | } |
55d3fdcf YW |
687 | break; |
688 | } | |
689 | ||
1e7a0e21 | 690 | r = sd_ndisc_router_prefix_get_flags(rt, &flags); |
e8c9b5b0 | 691 | if (r < 0) |
13e8a49a | 692 | return log_link_error_errno(link, r, "Failed to get RA prefix flags: %m"); |
1e7a0e21 | 693 | |
87d8a4de | 694 | if (link->network->ipv6_accept_ra_use_onlink_prefix && |
13e8a49a YW |
695 | FLAGS_SET(flags, ND_OPT_PI_FLAG_ONLINK)) { |
696 | r = ndisc_router_process_onlink_prefix(link, rt); | |
697 | if (r < 0) | |
698 | return r; | |
699 | } | |
062c2eea | 700 | |
87d8a4de | 701 | if (link->network->ipv6_accept_ra_use_autonomous_prefix && |
13e8a49a YW |
702 | FLAGS_SET(flags, ND_OPT_PI_FLAG_AUTO)) { |
703 | r = ndisc_router_process_autonomous_prefix(link, rt); | |
704 | if (r < 0) | |
705 | return r; | |
706 | } | |
1e7a0e21 LP |
707 | break; |
708 | } | |
709 | ||
710 | case SD_NDISC_OPTION_ROUTE_INFORMATION: | |
13e8a49a YW |
711 | r = ndisc_router_process_route(link, rt); |
712 | if (r < 0) | |
713 | return r; | |
1e7a0e21 LP |
714 | break; |
715 | ||
716 | case SD_NDISC_OPTION_RDNSS: | |
13e8a49a YW |
717 | if (link->network->ipv6_accept_ra_use_dns) { |
718 | r = ndisc_router_process_rdnss(link, rt); | |
719 | if (r < 0) | |
720 | return r; | |
721 | } | |
1e7a0e21 LP |
722 | break; |
723 | ||
724 | case SD_NDISC_OPTION_DNSSL: | |
13e8a49a YW |
725 | if (link->network->ipv6_accept_ra_use_dns) { |
726 | r = ndisc_router_process_dnssl(link, rt); | |
727 | if (r < 0) | |
728 | return r; | |
729 | } | |
1e7a0e21 LP |
730 | break; |
731 | } | |
1e7a0e21 LP |
732 | } |
733 | } | |
734 | ||
d5017c84 | 735 | static int ndisc_router_handler(Link *link, sd_ndisc_router *rt) { |
1e7a0e21 | 736 | uint64_t flags; |
86e2be7b | 737 | int r; |
1e7a0e21 LP |
738 | |
739 | assert(link); | |
740 | assert(link->network); | |
741 | assert(link->manager); | |
742 | assert(rt); | |
743 | ||
744 | r = sd_ndisc_router_get_flags(rt, &flags); | |
d5017c84 | 745 | if (r < 0) |
13e8a49a | 746 | return log_link_error_errno(link, r, "Failed to get RA flags: %m"); |
1e7a0e21 | 747 | |
ac24e418 SS |
748 | if ((flags & (ND_RA_FLAG_MANAGED | ND_RA_FLAG_OTHER) && link->network->ipv6_accept_ra_start_dhcp6_client)) { |
749 | ||
750 | if (link->network->ipv6_accept_ra_start_dhcp6_client == IPV6_ACCEPT_RA_START_DHCP6_CLIENT_ALWAYS) | |
751 | r = dhcp6_request_address(link, false); | |
752 | else | |
753 | /* (re)start DHCPv6 client in stateful or stateless mode according to RA flags */ | |
754 | r = dhcp6_request_address(link, !(flags & ND_RA_FLAG_MANAGED)); | |
1e7a0e21 | 755 | if (r < 0 && r != -EBUSY) |
13e8a49a | 756 | return log_link_error_errno(link, r, "Could not acquire DHCPv6 lease on NDisc request: %m"); |
d5017c84 | 757 | else { |
1e7a0e21 | 758 | log_link_debug(link, "Acquiring DHCPv6 lease on NDisc request"); |
d5017c84 YW |
759 | r = 0; |
760 | } | |
1e7a0e21 LP |
761 | } |
762 | ||
13e8a49a YW |
763 | r = ndisc_router_process_default(link, rt); |
764 | if (r < 0) | |
765 | return r; | |
766 | r = ndisc_router_process_options(link, rt); | |
767 | if (r < 0) | |
768 | return r; | |
d5017c84 YW |
769 | |
770 | return r; | |
1e7a0e21 LP |
771 | } |
772 | ||
773 | static void ndisc_handler(sd_ndisc *nd, sd_ndisc_event event, sd_ndisc_router *rt, void *userdata) { | |
9d96e6c3 | 774 | Link *link = userdata; |
13e8a49a | 775 | int r; |
a13c50e7 | 776 | |
9d96e6c3 | 777 | assert(link); |
a13c50e7 | 778 | |
9d96e6c3 TG |
779 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
780 | return; | |
a13c50e7 | 781 | |
9d96e6c3 | 782 | switch (event) { |
1e7a0e21 LP |
783 | |
784 | case SD_NDISC_EVENT_ROUTER: | |
d98c546d YW |
785 | link->ndisc_addresses_configured = false; |
786 | link->ndisc_routes_configured = false; | |
787 | ||
13e8a49a YW |
788 | r = ndisc_router_handler(link, rt); |
789 | if (r < 0) { | |
790 | link_enter_failed(link); | |
791 | return; | |
792 | } | |
d98c546d YW |
793 | |
794 | if (link->ndisc_addresses_messages == 0) | |
795 | link->ndisc_addresses_configured = true; | |
0c816fcc | 796 | else { |
d98c546d YW |
797 | log_link_debug(link, "Setting SLAAC addresses."); |
798 | ||
0c816fcc YW |
799 | /* address_handler calls link_request_set_routes() and link_request_set_nexthop(). |
800 | * Before they are called, the related flags must be cleared. Otherwise, the link | |
801 | * becomes configured state before routes are configured. */ | |
802 | link->static_routes_configured = false; | |
803 | link->static_nexthops_configured = false; | |
804 | } | |
805 | ||
d98c546d YW |
806 | if (link->ndisc_routes_messages == 0) |
807 | link->ndisc_routes_configured = true; | |
808 | else | |
809 | log_link_debug(link, "Setting NDisc routes."); | |
810 | ||
811 | if (link->ndisc_addresses_configured && link->ndisc_routes_configured) | |
812 | link_check_ready(link); | |
813 | else | |
814 | link_set_state(link, LINK_STATE_CONFIGURING); | |
1e7a0e21 LP |
815 | break; |
816 | ||
9d96e6c3 | 817 | case SD_NDISC_EVENT_TIMEOUT: |
a8c10331 | 818 | log_link_debug(link, "NDisc handler get timeout event"); |
d98c546d YW |
819 | link->ndisc_addresses_configured = true; |
820 | link->ndisc_routes_configured = true; | |
962b0647 TG |
821 | link_check_ready(link); |
822 | ||
9d96e6c3 TG |
823 | break; |
824 | default: | |
a8c10331 | 825 | assert_not_reached("Unknown NDisc event"); |
a13c50e7 TG |
826 | } |
827 | } | |
828 | ||
829 | int ndisc_configure(Link *link) { | |
830 | int r; | |
831 | ||
1e7a0e21 LP |
832 | assert(link); |
833 | ||
834 | r = sd_ndisc_new(&link->ndisc); | |
835 | if (r < 0) | |
836 | return r; | |
a13c50e7 | 837 | |
1e7a0e21 | 838 | r = sd_ndisc_attach_event(link->ndisc, NULL, 0); |
a13c50e7 TG |
839 | if (r < 0) |
840 | return r; | |
841 | ||
1e7a0e21 | 842 | r = sd_ndisc_set_mac(link->ndisc, &link->mac); |
a13c50e7 TG |
843 | if (r < 0) |
844 | return r; | |
845 | ||
1e7a0e21 | 846 | r = sd_ndisc_set_ifindex(link->ndisc, link->ifindex); |
a13c50e7 TG |
847 | if (r < 0) |
848 | return r; | |
849 | ||
1e7a0e21 | 850 | r = sd_ndisc_set_callback(link->ndisc, ndisc_handler, link); |
a13c50e7 TG |
851 | if (r < 0) |
852 | return r; | |
853 | ||
1e7a0e21 LP |
854 | return 0; |
855 | } | |
856 | ||
857 | void ndisc_vacuum(Link *link) { | |
858 | NDiscRDNSS *r; | |
859 | NDiscDNSSL *d; | |
860 | Iterator i; | |
861 | usec_t time_now; | |
862 | ||
863 | assert(link); | |
864 | ||
865 | /* Removes all RDNSS and DNSSL entries whose validity time has passed */ | |
866 | ||
867 | time_now = now(clock_boottime_or_monotonic()); | |
868 | ||
869 | SET_FOREACH(r, link->ndisc_rdnss, i) | |
870 | if (r->valid_until < time_now) { | |
02affb4e | 871 | free(set_remove(link->ndisc_rdnss, r)); |
1e7a0e21 LP |
872 | link_dirty(link); |
873 | } | |
a13c50e7 | 874 | |
1e7a0e21 LP |
875 | SET_FOREACH(d, link->ndisc_dnssl, i) |
876 | if (d->valid_until < time_now) { | |
02affb4e | 877 | free(set_remove(link->ndisc_dnssl, d)); |
1e7a0e21 LP |
878 | link_dirty(link); |
879 | } | |
a13c50e7 | 880 | } |
c69305ff LP |
881 | |
882 | void ndisc_flush(Link *link) { | |
883 | assert(link); | |
884 | ||
885 | /* Removes all RDNSS and DNSSL entries, without exception */ | |
886 | ||
887 | link->ndisc_rdnss = set_free_free(link->ndisc_rdnss); | |
888 | link->ndisc_dnssl = set_free_free(link->ndisc_dnssl); | |
889 | } | |
e520ce64 | 890 | |
5f506a55 SS |
891 | int ipv6token_new(IPv6Token **ret) { |
892 | IPv6Token *p; | |
893 | ||
894 | p = new(IPv6Token, 1); | |
895 | if (!p) | |
896 | return -ENOMEM; | |
897 | ||
898 | *p = (IPv6Token) { | |
899 | .address_generation_type = IPV6_TOKEN_ADDRESS_GENERATION_NONE, | |
900 | }; | |
901 | ||
902 | *ret = TAKE_PTR(p); | |
903 | ||
904 | return 0; | |
905 | } | |
906 | ||
907 | DEFINE_HASH_OPS_WITH_VALUE_DESTRUCTOR( | |
908 | ipv6_token_hash_ops, | |
909 | void, | |
910 | trivial_hash_func, | |
911 | trivial_compare_func, | |
912 | IPv6Token, | |
913 | free); | |
914 | ||
6b000af4 | 915 | int config_parse_ndisc_deny_listed_prefix( |
e520ce64 SS |
916 | const char *unit, |
917 | const char *filename, | |
918 | unsigned line, | |
919 | const char *section, | |
920 | unsigned section_line, | |
921 | const char *lvalue, | |
922 | int ltype, | |
923 | const char *rvalue, | |
924 | void *data, | |
925 | void *userdata) { | |
926 | ||
927 | Network *network = data; | |
928 | const char *p; | |
929 | int r; | |
930 | ||
931 | assert(filename); | |
932 | assert(lvalue); | |
933 | assert(rvalue); | |
934 | assert(data); | |
935 | ||
936 | if (isempty(rvalue)) { | |
6b000af4 | 937 | network->ndisc_deny_listed_prefix = set_free_free(network->ndisc_deny_listed_prefix); |
e520ce64 SS |
938 | return 0; |
939 | } | |
940 | ||
941 | for (p = rvalue;;) { | |
942 | _cleanup_free_ char *n = NULL; | |
943 | _cleanup_free_ struct in6_addr *a = NULL; | |
944 | union in_addr_union ip; | |
945 | ||
946 | r = extract_first_word(&p, &n, NULL, 0); | |
d96edb2c YW |
947 | if (r == -ENOMEM) |
948 | return log_oom(); | |
e520ce64 | 949 | if (r < 0) { |
d96edb2c | 950 | log_syntax(unit, LOG_WARNING, filename, line, r, |
a8c10331 | 951 | "Failed to parse NDisc deny-listed prefix, ignoring assignment: %s", |
e520ce64 SS |
952 | rvalue); |
953 | return 0; | |
954 | } | |
955 | if (r == 0) | |
956 | return 0; | |
957 | ||
958 | r = in_addr_from_string(AF_INET6, n, &ip); | |
959 | if (r < 0) { | |
d96edb2c | 960 | log_syntax(unit, LOG_WARNING, filename, line, r, |
a8c10331 | 961 | "NDisc deny-listed prefix is invalid, ignoring assignment: %s", n); |
e520ce64 SS |
962 | continue; |
963 | } | |
964 | ||
6b000af4 | 965 | if (set_contains(network->ndisc_deny_listed_prefix, &ip.in6)) |
e4443f9b YW |
966 | continue; |
967 | ||
e520ce64 SS |
968 | a = newdup(struct in6_addr, &ip.in6, 1); |
969 | if (!a) | |
970 | return log_oom(); | |
971 | ||
6b000af4 | 972 | r = set_ensure_consume(&network->ndisc_deny_listed_prefix, &in6_addr_hash_ops, TAKE_PTR(a)); |
35e601d4 ZJS |
973 | if (r < 0) |
974 | return log_oom(); | |
e520ce64 | 975 | } |
e520ce64 | 976 | } |
5f506a55 SS |
977 | |
978 | int config_parse_address_generation_type( | |
979 | const char *unit, | |
980 | const char *filename, | |
981 | unsigned line, | |
982 | const char *section, | |
983 | unsigned section_line, | |
984 | const char *lvalue, | |
985 | int ltype, | |
986 | const char *rvalue, | |
987 | void *data, | |
988 | void *userdata) { | |
989 | ||
990 | _cleanup_free_ IPv6Token *token = NULL; | |
5f506a55 SS |
991 | union in_addr_union buffer; |
992 | Network *network = data; | |
993 | const char *p; | |
994 | int r; | |
995 | ||
996 | assert(filename); | |
997 | assert(lvalue); | |
998 | assert(rvalue); | |
999 | assert(data); | |
1000 | ||
1001 | if (isempty(rvalue)) { | |
1002 | network->ipv6_tokens = ordered_hashmap_free(network->ipv6_tokens); | |
1003 | return 0; | |
1004 | } | |
1005 | ||
5f506a55 SS |
1006 | r = ipv6token_new(&token); |
1007 | if (r < 0) | |
1008 | return log_oom(); | |
1009 | ||
b751c3e7 | 1010 | if ((p = startswith(rvalue, "static:"))) |
e2c4070e | 1011 | token->address_generation_type = IPV6_TOKEN_ADDRESS_GENERATION_STATIC; |
b751c3e7 | 1012 | else if ((p = startswith(rvalue, "prefixstable:"))) |
5f506a55 SS |
1013 | token->address_generation_type = IPV6_TOKEN_ADDRESS_GENERATION_PREFIXSTABLE; |
1014 | else { | |
e2c4070e | 1015 | token->address_generation_type = IPV6_TOKEN_ADDRESS_GENERATION_STATIC; |
5f506a55 | 1016 | p = rvalue; |
f0c1ad30 YW |
1017 | } |
1018 | ||
5f506a55 SS |
1019 | r = in_addr_from_string(AF_INET6, p, &buffer); |
1020 | if (r < 0) { | |
d96edb2c | 1021 | log_syntax(unit, LOG_WARNING, filename, line, r, |
5f506a55 SS |
1022 | "Failed to parse IPv6 %s, ignoring: %s", lvalue, rvalue); |
1023 | return 0; | |
1024 | } | |
1025 | ||
1026 | if (in_addr_is_null(AF_INET6, &buffer)) { | |
d96edb2c | 1027 | log_syntax(unit, LOG_WARNING, filename, line, 0, |
5f506a55 SS |
1028 | "IPv6 %s cannot be the ANY address, ignoring: %s", lvalue, rvalue); |
1029 | return 0; | |
1030 | } | |
1031 | ||
1032 | token->prefix = buffer.in6; | |
1033 | ||
1034 | r = ordered_hashmap_ensure_allocated(&network->ipv6_tokens, &ipv6_token_hash_ops); | |
1035 | if (r < 0) | |
1036 | return log_oom(); | |
1037 | ||
1038 | r = ordered_hashmap_put(network->ipv6_tokens, &token->prefix, token); | |
1039 | if (r < 0) { | |
d96edb2c | 1040 | log_syntax(unit, LOG_WARNING, filename, line, r, |
5f506a55 SS |
1041 | "Failed to store IPv6 token '%s'", rvalue); |
1042 | return 0; | |
1043 | } | |
1044 | ||
1045 | TAKE_PTR(token); | |
1046 | ||
1047 | return 0; | |
1048 | } | |
ac24e418 SS |
1049 | |
1050 | DEFINE_CONFIG_PARSE_ENUM(config_parse_ipv6_accept_ra_start_dhcp6_client, ipv6_accept_ra_start_dhcp6_client, IPv6AcceptRAStartDHCP6Client, | |
1051 | "Failed to parse DHCPv6Client= setting") | |
1052 | static const char* const ipv6_accept_ra_start_dhcp6_client_table[_IPV6_ACCEPT_RA_START_DHCP6_CLIENT_MAX] = { | |
1053 | [IPV6_ACCEPT_RA_START_DHCP6_CLIENT_NO] = "no", | |
1054 | [IPV6_ACCEPT_RA_START_DHCP6_CLIENT_ALWAYS] = "always", | |
1055 | [IPV6_ACCEPT_RA_START_DHCP6_CLIENT_YES] = "yes", | |
1056 | }; | |
1057 | ||
1058 | DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(ipv6_accept_ra_start_dhcp6_client, IPv6AcceptRAStartDHCP6Client, IPV6_ACCEPT_RA_START_DHCP6_CLIENT_YES); |