1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 #include "alloc-util.h"
6 #include "conf-parser.h"
7 #include "firewall-util.h"
8 #include "netlink-util.h"
9 #include "networkd-address.h"
10 #include "networkd-manager.h"
11 #include "parse-util.h"
13 #include "socket-util.h"
14 #include "string-util.h"
19 #define ADDRESSES_PER_LINK_MAX 2048U
20 #define STATIC_ADDRESSES_PER_NETWORK_MAX 1024U
22 int address_new(Address
**ret
) {
23 _cleanup_(address_freep
) Address
*address
= NULL
;
25 address
= new(Address
, 1);
29 *address
= (Address
) {
31 .scope
= RT_SCOPE_UNIVERSE
,
32 .cinfo
.ifa_prefered
= CACHE_INFO_INFINITY_LIFE_TIME
,
33 .cinfo
.ifa_valid
= CACHE_INFO_INFINITY_LIFE_TIME
,
36 *ret
= TAKE_PTR(address
);
41 int address_new_static(Network
*network
, const char *filename
, unsigned section_line
, Address
**ret
) {
42 _cleanup_(network_config_section_freep
) NetworkConfigSection
*n
= NULL
;
43 _cleanup_(address_freep
) Address
*address
= NULL
;
48 assert(!!filename
== (section_line
> 0));
51 r
= network_config_section_new(filename
, section_line
, &n
);
55 address
= hashmap_get(network
->addresses_by_section
, n
);
57 *ret
= TAKE_PTR(address
);
63 if (network
->n_static_addresses
>= STATIC_ADDRESSES_PER_NETWORK_MAX
)
66 r
= address_new(&address
);
70 address
->network
= network
;
71 LIST_APPEND(addresses
, network
->static_addresses
, address
);
72 network
->n_static_addresses
++;
75 address
->section
= TAKE_PTR(n
);
77 r
= hashmap_ensure_allocated(&network
->addresses_by_section
, &network_config_hash_ops
);
81 r
= hashmap_put(network
->addresses_by_section
, address
->section
, address
);
86 *ret
= TAKE_PTR(address
);
91 void address_free(Address
*address
) {
95 if (address
->network
) {
96 LIST_REMOVE(addresses
, address
->network
->static_addresses
, address
);
97 assert(address
->network
->n_static_addresses
> 0);
98 address
->network
->n_static_addresses
--;
100 if (address
->section
)
101 hashmap_remove(address
->network
->addresses_by_section
, address
->section
);
105 set_remove(address
->link
->addresses
, address
);
106 set_remove(address
->link
->addresses_foreign
, address
);
108 if (in_addr_equal(AF_INET6
, &address
->in_addr
, (const union in_addr_union
*) &address
->link
->ipv6ll_address
))
109 memzero(&address
->link
->ipv6ll_address
, sizeof(struct in6_addr
));
112 network_config_section_free(address
->section
);
113 free(address
->label
);
117 static void address_hash_func(const Address
*a
, struct siphash
*state
) {
120 siphash24_compress(&a
->family
, sizeof(a
->family
), state
);
124 siphash24_compress(&a
->prefixlen
, sizeof(a
->prefixlen
), state
);
127 if (a
->prefixlen
!= 0) {
130 if (a
->in_addr_peer
.in
.s_addr
!= 0)
131 prefix
= be32toh(a
->in_addr_peer
.in
.s_addr
) >> (32 - a
->prefixlen
);
133 prefix
= be32toh(a
->in_addr
.in
.s_addr
) >> (32 - a
->prefixlen
);
135 siphash24_compress(&prefix
, sizeof(prefix
), state
);
141 siphash24_compress(&a
->in_addr
, FAMILY_ADDRESS_SIZE(a
->family
), state
);
145 /* treat any other address family as AF_UNSPEC */
150 static int address_compare_func(const Address
*a1
, const Address
*a2
) {
153 r
= CMP(a1
->family
, a2
->family
);
157 switch (a1
->family
) {
158 /* use the same notion of equality as the kernel does */
160 r
= CMP(a1
->prefixlen
, a2
->prefixlen
);
164 /* compare the peer prefixes */
165 if (a1
->prefixlen
!= 0) {
166 /* make sure we don't try to shift by 32.
167 * See ISO/IEC 9899:TC3 ยง 6.5.7.3. */
170 if (a1
->in_addr_peer
.in
.s_addr
!= 0)
171 b1
= be32toh(a1
->in_addr_peer
.in
.s_addr
) >> (32 - a1
->prefixlen
);
173 b1
= be32toh(a1
->in_addr
.in
.s_addr
) >> (32 - a1
->prefixlen
);
175 if (a2
->in_addr_peer
.in
.s_addr
!= 0)
176 b2
= be32toh(a2
->in_addr_peer
.in
.s_addr
) >> (32 - a1
->prefixlen
);
178 b2
= be32toh(a2
->in_addr
.in
.s_addr
) >> (32 - a1
->prefixlen
);
187 return memcmp(&a1
->in_addr
, &a2
->in_addr
, FAMILY_ADDRESS_SIZE(a1
->family
));
189 /* treat any other address family as AF_UNSPEC */
194 DEFINE_PRIVATE_HASH_OPS(address_hash_ops
, Address
, address_hash_func
, address_compare_func
);
196 bool address_equal(Address
*a1
, Address
*a2
) {
203 return address_compare_func(a1
, a2
) == 0;
206 static int address_establish(Address
*address
, Link
*link
) {
213 masq
= link
->network
&&
214 link
->network
->ip_masquerade
&&
215 address
->family
== AF_INET
&&
216 address
->scope
< RT_SCOPE_LINK
;
218 /* Add firewall entry if this is requested */
219 if (address
->ip_masquerade_done
!= masq
) {
220 union in_addr_union masked
= address
->in_addr
;
221 in_addr_mask(address
->family
, &masked
, address
->prefixlen
);
223 r
= fw_add_masquerade(masq
, AF_INET
, 0, &masked
, address
->prefixlen
, NULL
, NULL
, 0);
225 log_link_warning_errno(link
, r
, "Could not enable IP masquerading: %m");
227 address
->ip_masquerade_done
= masq
;
233 static int address_add_internal(Link
*link
, Set
**addresses
,
235 const union in_addr_union
*in_addr
,
236 unsigned char prefixlen
,
238 _cleanup_(address_freep
) Address
*address
= NULL
;
245 r
= address_new(&address
);
249 address
->family
= family
;
250 address
->in_addr
= *in_addr
;
251 address
->prefixlen
= prefixlen
;
252 /* Consider address tentative until we get the real flags from the kernel */
253 address
->flags
= IFA_F_TENTATIVE
;
255 r
= set_ensure_allocated(addresses
, &address_hash_ops
);
259 r
= set_put(*addresses
, address
);
263 address
->link
= link
;
273 int address_add_foreign(Link
*link
, int family
, const union in_addr_union
*in_addr
, unsigned char prefixlen
, Address
**ret
) {
274 return address_add_internal(link
, &link
->addresses_foreign
, family
, in_addr
, prefixlen
, ret
);
277 int address_add(Link
*link
, int family
, const union in_addr_union
*in_addr
, unsigned char prefixlen
, Address
**ret
) {
281 r
= address_get(link
, family
, in_addr
, prefixlen
, &address
);
283 /* Address does not exist, create a new one */
284 r
= address_add_internal(link
, &link
->addresses
, family
, in_addr
, prefixlen
, &address
);
288 /* Take over a foreign address */
289 r
= set_ensure_allocated(&link
->addresses
, &address_hash_ops
);
293 r
= set_put(link
->addresses
, address
);
297 set_remove(link
->addresses_foreign
, address
);
299 /* Already exists, do nothing */
310 static int address_release(Address
*address
) {
314 assert(address
->link
);
316 /* Remove masquerading firewall entry if it was added */
317 if (address
->ip_masquerade_done
) {
318 union in_addr_union masked
= address
->in_addr
;
319 in_addr_mask(address
->family
, &masked
, address
->prefixlen
);
321 r
= fw_add_masquerade(false, AF_INET
, 0, &masked
, address
->prefixlen
, NULL
, NULL
, 0);
323 log_link_warning_errno(address
->link
, r
, "Failed to disable IP masquerading: %m");
325 address
->ip_masquerade_done
= false;
335 const struct ifa_cacheinfo
*cinfo
) {
342 assert_return(address
->link
, 1);
344 if (IN_SET(address
->link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
347 ready
= address_is_ready(address
);
349 address
->flags
= flags
;
350 address
->scope
= scope
;
351 address
->cinfo
= *cinfo
;
353 link_update_operstate(address
->link
);
354 link_check_ready(address
->link
);
357 address_is_ready(address
) &&
358 address
->family
== AF_INET6
&&
359 in_addr_is_link_local(AF_INET6
, &address
->in_addr
) > 0 &&
360 in_addr_is_null(AF_INET6
, (const union in_addr_union
*) &address
->link
->ipv6ll_address
) > 0) {
362 r
= link_ipv6ll_gained(address
->link
, &address
->in_addr
.in6
);
370 int address_drop(Address
*address
) {
376 ready
= address_is_ready(address
);
377 link
= address
->link
;
379 address_release(address
);
380 address_free(address
);
382 link_update_operstate(link
);
385 link_check_ready(link
);
390 int address_get(Link
*link
,
392 const union in_addr_union
*in_addr
,
393 unsigned char prefixlen
,
396 Address address
, *existing
;
401 address
= (Address
) {
404 .prefixlen
= prefixlen
,
407 existing
= set_get(link
->addresses
, &address
);
414 existing
= set_get(link
->addresses_foreign
, &address
);
424 static int address_remove_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
429 assert(link
->ifname
);
431 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
434 r
= sd_netlink_message_get_errno(m
);
435 if (r
< 0 && r
!= -EADDRNOTAVAIL
)
436 log_link_warning_errno(link
, r
, "Could not drop address: %m");
444 link_netlink_message_handler_t callback
) {
446 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
447 _cleanup_free_
char *b
= NULL
;
451 assert(IN_SET(address
->family
, AF_INET
, AF_INET6
));
453 assert(link
->ifindex
> 0);
454 assert(link
->manager
);
455 assert(link
->manager
->rtnl
);
458 if (in_addr_to_string(address
->family
, &address
->in_addr
, &b
) >= 0)
459 log_link_debug(link
, "Removing address %s", b
);
462 r
= sd_rtnl_message_new_addr(link
->manager
->rtnl
, &req
, RTM_DELADDR
,
463 link
->ifindex
, address
->family
);
465 return log_error_errno(r
, "Could not allocate RTM_DELADDR message: %m");
467 r
= sd_rtnl_message_addr_set_prefixlen(req
, address
->prefixlen
);
469 return log_error_errno(r
, "Could not set prefixlen: %m");
471 if (address
->family
== AF_INET
)
472 r
= sd_netlink_message_append_in_addr(req
, IFA_LOCAL
, &address
->in_addr
.in
);
473 else if (address
->family
== AF_INET6
)
474 r
= sd_netlink_message_append_in6_addr(req
, IFA_LOCAL
, &address
->in_addr
.in6
);
476 return log_error_errno(r
, "Could not append IFA_LOCAL attribute: %m");
478 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
,
479 callback
?: address_remove_handler
,
480 link_netlink_destroy_callback
, link
);
482 return log_error_errno(r
, "Could not send rtnetlink message: %m");
489 static int address_acquire(Link
*link
, Address
*original
, Address
**ret
) {
490 union in_addr_union in_addr
= {};
491 struct in_addr broadcast
= {};
492 _cleanup_(address_freep
) Address
*na
= NULL
;
499 /* Something useful was configured? just use it */
500 if (in_addr_is_null(original
->family
, &original
->in_addr
) <= 0)
503 /* The address is configured to be 0.0.0.0 or [::] by the user?
504 * Then let's acquire something more useful from the pool. */
505 r
= manager_address_pool_acquire(link
->manager
, original
->family
, original
->prefixlen
, &in_addr
);
507 return log_link_error_errno(link
, r
, "Failed to acquire address from pool: %m");
509 log_link_error(link
, "Couldn't find free address for interface, all taken.");
513 if (original
->family
== AF_INET
) {
514 /* Pick first address in range for ourselves ... */
515 in_addr
.in
.s_addr
= in_addr
.in
.s_addr
| htobe32(1);
517 /* .. and use last as broadcast address */
518 if (original
->prefixlen
> 30)
519 broadcast
.s_addr
= 0;
521 broadcast
.s_addr
= in_addr
.in
.s_addr
| htobe32(0xFFFFFFFFUL
>> original
->prefixlen
);
522 } else if (original
->family
== AF_INET6
)
523 in_addr
.in6
.s6_addr
[15] |= 1;
525 r
= address_new(&na
);
529 na
->family
= original
->family
;
530 na
->prefixlen
= original
->prefixlen
;
531 na
->scope
= original
->scope
;
532 na
->cinfo
= original
->cinfo
;
534 if (original
->label
) {
535 na
->label
= strdup(original
->label
);
540 na
->broadcast
= broadcast
;
541 na
->in_addr
= in_addr
;
543 LIST_PREPEND(addresses
, link
->pool_addresses
, na
);
550 int address_configure(
553 link_netlink_message_handler_t callback
,
556 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
560 assert(IN_SET(address
->family
, AF_INET
, AF_INET6
));
562 assert(link
->ifindex
> 0);
563 assert(link
->manager
);
564 assert(link
->manager
->rtnl
);
567 /* If this is a new address, then refuse adding more than the limit */
568 if (address_get(link
, address
->family
, &address
->in_addr
, address
->prefixlen
, NULL
) <= 0 &&
569 set_size(link
->addresses
) >= ADDRESSES_PER_LINK_MAX
)
572 r
= address_acquire(link
, address
, &address
);
577 r
= sd_rtnl_message_new_addr_update(link
->manager
->rtnl
, &req
,
578 link
->ifindex
, address
->family
);
580 r
= sd_rtnl_message_new_addr(link
->manager
->rtnl
, &req
, RTM_NEWADDR
,
581 link
->ifindex
, address
->family
);
583 return log_error_errno(r
, "Could not allocate RTM_NEWADDR message: %m");
585 r
= sd_rtnl_message_addr_set_prefixlen(req
, address
->prefixlen
);
587 return log_error_errno(r
, "Could not set prefixlen: %m");
589 address
->flags
|= IFA_F_PERMANENT
;
591 if (address
->home_address
)
592 address
->flags
|= IFA_F_HOMEADDRESS
;
594 if (address
->duplicate_address_detection
)
595 address
->flags
|= IFA_F_NODAD
;
597 if (address
->manage_temporary_address
)
598 address
->flags
|= IFA_F_MANAGETEMPADDR
;
600 if (address
->prefix_route
)
601 address
->flags
|= IFA_F_NOPREFIXROUTE
;
603 if (address
->autojoin
)
604 address
->flags
|= IFA_F_MCAUTOJOIN
;
606 r
= sd_rtnl_message_addr_set_flags(req
, (address
->flags
& 0xff));
608 return log_error_errno(r
, "Could not set flags: %m");
610 if (address
->flags
& ~0xff) {
611 r
= sd_netlink_message_append_u32(req
, IFA_FLAGS
, address
->flags
);
613 return log_error_errno(r
, "Could not set extended flags: %m");
616 r
= sd_rtnl_message_addr_set_scope(req
, address
->scope
);
618 return log_error_errno(r
, "Could not set scope: %m");
620 if (address
->family
== AF_INET
)
621 r
= sd_netlink_message_append_in_addr(req
, IFA_LOCAL
, &address
->in_addr
.in
);
622 else if (address
->family
== AF_INET6
)
623 r
= sd_netlink_message_append_in6_addr(req
, IFA_LOCAL
, &address
->in_addr
.in6
);
625 return log_error_errno(r
, "Could not append IFA_LOCAL attribute: %m");
627 if (!in_addr_is_null(address
->family
, &address
->in_addr_peer
)) {
628 if (address
->family
== AF_INET
)
629 r
= sd_netlink_message_append_in_addr(req
, IFA_ADDRESS
, &address
->in_addr_peer
.in
);
630 else if (address
->family
== AF_INET6
)
631 r
= sd_netlink_message_append_in6_addr(req
, IFA_ADDRESS
, &address
->in_addr_peer
.in6
);
633 return log_error_errno(r
, "Could not append IFA_ADDRESS attribute: %m");
634 } else if (address
->family
== AF_INET
&& address
->prefixlen
<= 30) {
635 r
= sd_netlink_message_append_in_addr(req
, IFA_BROADCAST
, &address
->broadcast
);
637 return log_error_errno(r
, "Could not append IFA_BROADCAST attribute: %m");
640 if (address
->label
) {
641 r
= sd_netlink_message_append_string(req
, IFA_LABEL
, address
->label
);
643 return log_error_errno(r
, "Could not append IFA_LABEL attribute: %m");
646 r
= sd_netlink_message_append_cache_info(req
, IFA_CACHEINFO
, &address
->cinfo
);
648 return log_error_errno(r
, "Could not append IFA_CACHEINFO attribute: %m");
650 r
= address_establish(address
, link
);
654 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, callback
, link_netlink_destroy_callback
, link
);
656 address_release(address
);
657 return log_error_errno(r
, "Could not send rtnetlink message: %m");
662 if (address
->family
== AF_INET6
&& !in_addr_is_null(address
->family
, &address
->in_addr_peer
))
663 r
= address_add(link
, address
->family
, &address
->in_addr_peer
, address
->prefixlen
, NULL
);
665 r
= address_add(link
, address
->family
, &address
->in_addr
, address
->prefixlen
, NULL
);
667 address_release(address
);
668 return log_error_errno(r
, "Could not add address: %m");
674 int config_parse_broadcast(
676 const char *filename
,
679 unsigned section_line
,
686 Network
*network
= userdata
;
687 _cleanup_(address_freep
) Address
*n
= NULL
;
696 r
= address_new_static(network
, filename
, section_line
, &n
);
700 if (n
->family
== AF_INET6
) {
701 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, "Broadcast is not valid for IPv6 addresses, ignoring assignment: %s", rvalue
);
705 r
= in_addr_from_string(AF_INET
, rvalue
, (union in_addr_union
*) &n
->broadcast
);
707 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Broadcast is invalid, ignoring assignment: %s", rvalue
);
717 int config_parse_address(const char *unit
,
718 const char *filename
,
721 unsigned section_line
,
728 Network
*network
= userdata
;
729 _cleanup_(address_freep
) Address
*n
= NULL
;
730 union in_addr_union buffer
;
731 unsigned char prefixlen
;
740 if (streq(section
, "Network")) {
741 /* we are not in an Address section, so treat
742 * this as the special '0' section */
743 r
= address_new_static(network
, NULL
, 0, &n
);
745 r
= address_new_static(network
, filename
, section_line
, &n
);
750 /* Address=address/prefixlen */
751 r
= in_addr_default_prefix_from_string_auto(rvalue
, &f
, &buffer
, &prefixlen
);
753 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Invalid address '%s', ignoring assignment: %m", rvalue
);
757 if (n
->family
!= AF_UNSPEC
&& f
!= n
->family
) {
758 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, "Address is incompatible, ignoring assignment: %s", rvalue
);
763 n
->prefixlen
= prefixlen
;
765 if (streq(lvalue
, "Address"))
768 n
->in_addr_peer
= buffer
;
770 if (n
->family
== AF_INET
&& n
->broadcast
.s_addr
== 0)
771 n
->broadcast
.s_addr
= n
->in_addr
.in
.s_addr
| htonl(0xfffffffflu
>> n
->prefixlen
);
778 int config_parse_label(
780 const char *filename
,
783 unsigned section_line
,
790 _cleanup_(address_freep
) Address
*n
= NULL
;
791 Network
*network
= userdata
;
800 r
= address_new_static(network
, filename
, section_line
, &n
);
804 if (!address_label_valid(rvalue
)) {
805 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, "Interface label is too long or invalid, ignoring assignment: %s", rvalue
);
809 r
= free_and_strdup(&n
->label
, rvalue
);
818 int config_parse_lifetime(const char *unit
,
819 const char *filename
,
822 unsigned section_line
,
828 Network
*network
= userdata
;
829 _cleanup_(address_freep
) Address
*n
= NULL
;
839 r
= address_new_static(network
, filename
, section_line
, &n
);
843 if (STR_IN_SET(rvalue
, "forever", "infinity")) {
844 n
->cinfo
.ifa_prefered
= CACHE_INFO_INFINITY_LIFE_TIME
;
850 r
= safe_atou(rvalue
, &k
);
852 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse PreferredLifetime, ignoring: %s", rvalue
);
857 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, "Invalid PreferredLifetime value, ignoring: %d", k
);
859 n
->cinfo
.ifa_prefered
= k
;
866 int config_parse_address_flags(const char *unit
,
867 const char *filename
,
870 unsigned section_line
,
876 Network
*network
= userdata
;
877 _cleanup_(address_freep
) Address
*n
= NULL
;
886 r
= address_new_static(network
, filename
, section_line
, &n
);
890 r
= parse_boolean(rvalue
);
892 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse address flag, ignoring: %s", rvalue
);
896 if (streq(lvalue
, "HomeAddress"))
898 else if (streq(lvalue
, "DuplicateAddressDetection"))
899 n
->duplicate_address_detection
= r
;
900 else if (streq(lvalue
, "ManageTemporaryAddress"))
901 n
->manage_temporary_address
= r
;
902 else if (streq(lvalue
, "PrefixRoute"))
904 else if (streq(lvalue
, "AutoJoin"))
910 int config_parse_address_scope(const char *unit
,
911 const char *filename
,
914 unsigned section_line
,
920 Network
*network
= userdata
;
921 _cleanup_(address_freep
) Address
*n
= NULL
;
930 r
= address_new_static(network
, filename
, section_line
, &n
);
934 if (streq(rvalue
, "host"))
935 n
->scope
= RT_SCOPE_HOST
;
936 else if (streq(rvalue
, "link"))
937 n
->scope
= RT_SCOPE_LINK
;
938 else if (streq(rvalue
, "global"))
939 n
->scope
= RT_SCOPE_UNIVERSE
;
941 r
= safe_atou8(rvalue
, &n
->scope
);
943 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Could not parse address scope \"%s\", ignoring assignment: %m", rvalue
);
953 bool address_is_ready(const Address
*a
) {
956 if (a
->family
== AF_INET6
)
957 return !(a
->flags
& IFA_F_TENTATIVE
);
959 return !(a
->flags
& (IFA_F_TENTATIVE
| IFA_F_DEPRECATED
));