1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 Copyright © 2017 Intel Corporation. All rights reserved.
6 #include <netinet/icmp6.h>
9 #include "networkd-address.h"
10 #include "networkd-manager.h"
11 #include "networkd-radv.h"
12 #include "parse-util.h"
14 #include "string-util.h"
17 int config_parse_router_prefix_delegation(
22 unsigned section_line
,
29 Network
*network
= userdata
;
38 if (streq(rvalue
, "static"))
39 network
->router_prefix_delegation
= RADV_PREFIX_DELEGATION_STATIC
;
40 else if (streq(rvalue
, "dhcpv6"))
41 network
->router_prefix_delegation
= RADV_PREFIX_DELEGATION_DHCP6
;
43 d
= parse_boolean(rvalue
);
45 network
->router_prefix_delegation
= RADV_PREFIX_DELEGATION_BOTH
;
47 network
->router_prefix_delegation
= RADV_PREFIX_DELEGATION_NONE
;
50 log_syntax(unit
, LOG_ERR
, filename
, line
, -EINVAL
, "Router prefix delegation '%s' is invalid, ignoring assignment: %m", rvalue
);
56 int config_parse_router_preference(const char *unit
,
60 unsigned section_line
,
66 Network
*network
= userdata
;
74 if (streq(rvalue
, "high"))
75 network
->router_preference
= SD_NDISC_PREFERENCE_HIGH
;
76 else if (STR_IN_SET(rvalue
, "medium", "normal", "default"))
77 network
->router_preference
= SD_NDISC_PREFERENCE_MEDIUM
;
78 else if (streq(rvalue
, "low"))
79 network
->router_preference
= SD_NDISC_PREFERENCE_LOW
;
81 log_syntax(unit
, LOG_ERR
, filename
, line
, -EINVAL
, "Router preference '%s' is invalid, ignoring assignment: %m", rvalue
);
86 void prefix_free(Prefix
*prefix
) {
90 if (prefix
->network
) {
91 LIST_REMOVE(prefixes
, prefix
->network
->static_prefixes
, prefix
);
92 assert(prefix
->network
->n_static_prefixes
> 0);
93 prefix
->network
->n_static_prefixes
--;
96 hashmap_remove(prefix
->network
->prefixes_by_section
,
100 prefix
->radv_prefix
= sd_radv_prefix_unref(prefix
->radv_prefix
);
105 int prefix_new(Prefix
**ret
) {
106 _cleanup_(prefix_freep
) Prefix
*prefix
= NULL
;
108 prefix
= new0(Prefix
, 1);
112 if (sd_radv_prefix_new(&prefix
->radv_prefix
) < 0)
115 *ret
= TAKE_PTR(prefix
);
120 int prefix_new_static(Network
*network
, const char *filename
,
121 unsigned section_line
, Prefix
**ret
) {
122 _cleanup_(network_config_section_freep
) NetworkConfigSection
*n
= NULL
;
123 _cleanup_(prefix_freep
) Prefix
*prefix
= NULL
;
128 assert(!!filename
== (section_line
> 0));
131 r
= network_config_section_new(filename
, section_line
, &n
);
136 prefix
= hashmap_get(network
->prefixes_by_section
, n
);
138 *ret
= TAKE_PTR(prefix
);
145 r
= prefix_new(&prefix
);
150 prefix
->section
= TAKE_PTR(n
);
152 r
= hashmap_put(network
->prefixes_by_section
, prefix
->section
,
158 prefix
->network
= network
;
159 LIST_APPEND(prefixes
, network
->static_prefixes
, prefix
);
160 network
->n_static_prefixes
++;
162 *ret
= TAKE_PTR(prefix
);
167 int config_parse_prefix(const char *unit
,
168 const char *filename
,
171 unsigned section_line
,
178 Network
*network
= userdata
;
179 _cleanup_(prefix_freep
) Prefix
*p
= NULL
;
180 uint8_t prefixlen
= 64;
181 union in_addr_union in6addr
;
190 r
= prefix_new_static(network
, filename
, section_line
, &p
);
194 r
= in_addr_prefix_from_string(rvalue
, AF_INET6
, &in6addr
, &prefixlen
);
196 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Prefix is invalid, ignoring assignment: %s", rvalue
);
200 if (sd_radv_prefix_set_prefix(p
->radv_prefix
, &in6addr
.in6
, prefixlen
) < 0)
201 return -EADDRNOTAVAIL
;
203 log_syntax(unit
, LOG_INFO
, filename
, line
, r
, "Found prefix %s", rvalue
);
210 int config_parse_prefix_flags(const char *unit
,
211 const char *filename
,
214 unsigned section_line
,
220 Network
*network
= userdata
;
221 _cleanup_(prefix_freep
) Prefix
*p
= NULL
;
230 r
= prefix_new_static(network
, filename
, section_line
, &p
);
234 r
= parse_boolean(rvalue
);
236 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse address flag, ignoring: %s", rvalue
);
242 if (streq(lvalue
, "OnLink"))
243 r
= sd_radv_prefix_set_onlink(p
->radv_prefix
, val
);
244 else if (streq(lvalue
, "AddressAutoconfiguration"))
245 r
= sd_radv_prefix_set_address_autoconfiguration(p
->radv_prefix
, val
);
254 int config_parse_prefix_lifetime(const char *unit
,
255 const char *filename
,
258 unsigned section_line
,
264 Network
*network
= userdata
;
265 _cleanup_(prefix_freep
) Prefix
*p
= NULL
;
275 r
= prefix_new_static(network
, filename
, section_line
, &p
);
279 r
= parse_sec(rvalue
, &usec
);
281 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Lifetime is invalid, ignoring assignment: %s", rvalue
);
285 /* a value of 0xffffffff represents infinity */
286 if (streq(lvalue
, "PreferredLifetimeSec"))
287 r
= sd_radv_prefix_set_preferred_lifetime(p
->radv_prefix
,
288 DIV_ROUND_UP(usec
, USEC_PER_SEC
));
289 else if (streq(lvalue
, "ValidLifetimeSec"))
290 r
= sd_radv_prefix_set_valid_lifetime(p
->radv_prefix
,
291 DIV_ROUND_UP(usec
, USEC_PER_SEC
));
300 static int radv_get_ip6dns(Network
*network
, struct in6_addr
**dns
,
302 _cleanup_free_
struct in6_addr
*addresses
= NULL
;
303 size_t i
, n_addresses
= 0, n_allocated
= 0;
309 for (i
= 0; i
< network
->n_dns
; i
++) {
310 union in_addr_union
*addr
;
312 if (network
->dns
[i
].family
!= AF_INET6
)
315 addr
= &network
->dns
[i
].address
;
317 if (in_addr_is_null(AF_INET6
, addr
) ||
318 in_addr_is_link_local(AF_INET6
, addr
) ||
319 in_addr_is_localhost(AF_INET6
, addr
))
322 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
325 addresses
[n_addresses
++] = addr
->in6
;
329 *dns
= TAKE_PTR(addresses
);
331 *n_dns
= n_addresses
;
337 static int radv_set_dns(Link
*link
, Link
*uplink
) {
338 _cleanup_free_
struct in6_addr
*dns
= NULL
;
340 usec_t lifetime_usec
;
343 if (!link
->network
->router_emit_dns
)
346 if (link
->network
->router_dns
) {
347 dns
= newdup(struct in6_addr
, link
->network
->router_dns
,
348 link
->network
->n_router_dns
);
352 n_dns
= link
->network
->n_router_dns
;
353 lifetime_usec
= link
->network
->router_dns_lifetime_usec
;
358 lifetime_usec
= SD_RADV_DEFAULT_DNS_LIFETIME_USEC
;
360 r
= radv_get_ip6dns(link
->network
, &dns
, &n_dns
);
365 if (uplink
->network
== NULL
) {
366 log_link_debug(uplink
, "Cannot fetch DNS servers as uplink interface is not managed by us");
370 r
= radv_get_ip6dns(uplink
->network
, &dns
, &n_dns
);
378 return sd_radv_set_rdnss(link
->radv
,
379 DIV_ROUND_UP(lifetime_usec
, USEC_PER_SEC
),
383 static int radv_set_domains(Link
*link
, Link
*uplink
) {
384 char **search_domains
;
385 usec_t lifetime_usec
;
387 if (!link
->network
->router_emit_domains
)
390 search_domains
= link
->network
->router_search_domains
;
391 lifetime_usec
= link
->network
->router_dns_lifetime_usec
;
396 lifetime_usec
= SD_RADV_DEFAULT_DNS_LIFETIME_USEC
;
398 search_domains
= link
->network
->search_domains
;
403 if (uplink
->network
== NULL
) {
404 log_link_debug(uplink
, "Cannot fetch DNS search domains as uplink interface is not managed by us");
408 search_domains
= uplink
->network
->search_domains
;
416 return sd_radv_set_dnssl(link
->radv
,
417 DIV_ROUND_UP(lifetime_usec
, USEC_PER_SEC
),
422 int radv_emit_dns(Link
*link
) {
426 uplink
= manager_find_uplink(link
->manager
, link
);
428 r
= radv_set_dns(link
, uplink
);
430 log_link_warning_errno(link
, r
, "Could not set RA DNS: %m");
432 r
= radv_set_domains(link
, uplink
);
434 log_link_warning_errno(link
, r
, "Could not set RA Domains: %m");
439 int radv_configure(Link
*link
) {
444 assert(link
->network
);
446 r
= sd_radv_new(&link
->radv
);
450 r
= sd_radv_attach_event(link
->radv
, NULL
, 0);
454 r
= sd_radv_set_mac(link
->radv
, &link
->mac
);
458 r
= sd_radv_set_ifindex(link
->radv
, link
->ifindex
);
462 r
= sd_radv_set_managed_information(link
->radv
, link
->network
->router_managed
);
466 r
= sd_radv_set_other_information(link
->radv
, link
->network
->router_other_information
);
470 /* a value of 0xffffffff represents infinity, 0x0 means this host is
472 r
= sd_radv_set_router_lifetime(link
->radv
,
473 DIV_ROUND_UP(link
->network
->router_lifetime_usec
, USEC_PER_SEC
));
477 if (link
->network
->router_lifetime_usec
> 0) {
478 r
= sd_radv_set_preference(link
->radv
,
479 link
->network
->router_preference
);
484 if (IN_SET(link
->network
->router_prefix_delegation
,
485 RADV_PREFIX_DELEGATION_STATIC
,
486 RADV_PREFIX_DELEGATION_BOTH
)) {
487 LIST_FOREACH(prefixes
, p
, link
->network
->static_prefixes
) {
488 r
= sd_radv_add_prefix(link
->radv
, p
->radv_prefix
, false);
489 if (r
!= -EEXIST
&& r
< 0)
494 return radv_emit_dns(link
);