1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
3 Copyright © 2015-2017 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
8 #include <netinet/in.h>
9 #include <linux/if_arp.h>
10 #include <linux/ipv6_route.h>
12 #include "sd-resolve.h"
14 #include "alloc-util.h"
15 #include "dns-domain.h"
16 #include "event-util.h"
19 #include "hexdecoct.h"
20 #include "memory-util.h"
21 #include "netlink-util.h"
22 #include "networkd-manager.h"
23 #include "networkd-route-util.h"
24 #include "networkd-route.h"
25 #include "networkd-util.h"
26 #include "parse-helpers.h"
27 #include "parse-util.h"
28 #include "random-util.h"
29 #include "resolve-private.h"
30 #include "string-util.h"
32 #include "wireguard.h"
34 static void wireguard_resolve_endpoints(NetDev
*netdev
);
35 static int peer_resolve_endpoint(WireguardPeer
*peer
);
37 static WireguardPeer
* wireguard_peer_free(WireguardPeer
*peer
) {
38 WireguardIPmask
*mask
;
43 if (peer
->wireguard
) {
44 LIST_REMOVE(peers
, peer
->wireguard
->peers
, peer
);
47 hashmap_remove(peer
->wireguard
->peers_by_section
, peer
->section
);
50 config_section_free(peer
->section
);
52 while ((mask
= peer
->ipmasks
)) {
53 LIST_REMOVE(ipmasks
, peer
->ipmasks
, mask
);
57 free(peer
->endpoint_host
);
58 free(peer
->endpoint_port
);
59 free(peer
->preshared_key_file
);
60 explicit_bzero_safe(peer
->preshared_key
, WG_KEY_LEN
);
62 sd_event_source_disable_unref(peer
->resolve_retry_event_source
);
63 sd_resolve_query_unref(peer
->resolve_query
);
68 DEFINE_SECTION_CLEANUP_FUNCTIONS(WireguardPeer
, wireguard_peer_free
);
70 static int wireguard_peer_new_static(Wireguard
*w
, const char *filename
, unsigned section_line
, WireguardPeer
**ret
) {
71 _cleanup_(config_section_freep
) ConfigSection
*n
= NULL
;
72 _cleanup_(wireguard_peer_freep
) WireguardPeer
*peer
= NULL
;
78 assert(section_line
> 0);
80 r
= config_section_new(filename
, section_line
, &n
);
84 peer
= hashmap_get(w
->peers_by_section
, n
);
86 *ret
= TAKE_PTR(peer
);
90 peer
= new(WireguardPeer
, 1);
94 *peer
= (WireguardPeer
) {
95 .flags
= WGPEER_F_REPLACE_ALLOWEDIPS
,
97 .section
= TAKE_PTR(n
),
100 LIST_PREPEND(peers
, w
->peers
, peer
);
102 r
= hashmap_ensure_put(&w
->peers_by_section
, &config_section_hash_ops
, peer
->section
, peer
);
106 *ret
= TAKE_PTR(peer
);
110 static int wireguard_set_ipmask_one(NetDev
*netdev
, sd_netlink_message
*message
, const WireguardIPmask
*mask
, uint16_t index
) {
117 /* This returns 1 on success, 0 on recoverable error, and negative errno on failure. */
119 r
= sd_netlink_message_open_array(message
, index
);
123 r
= sd_netlink_message_append_u16(message
, WGALLOWEDIP_A_FAMILY
, mask
->family
);
127 r
= netlink_message_append_in_addr_union(message
, WGALLOWEDIP_A_IPADDR
, mask
->family
, &mask
->ip
);
131 r
= sd_netlink_message_append_u8(message
, WGALLOWEDIP_A_CIDR_MASK
, mask
->cidr
);
135 r
= sd_netlink_message_close_container(message
);
137 return log_netdev_error_errno(netdev
, r
, "Could not add wireguard allowed ip: %m");
142 r
= sd_netlink_message_cancel_array(message
);
144 return log_netdev_error_errno(netdev
, r
, "Could not cancel wireguard allowed ip message attribute: %m");
149 static int wireguard_set_peer_one(NetDev
*netdev
, sd_netlink_message
*message
, const WireguardPeer
*peer
, uint16_t index
, WireguardIPmask
**mask_start
) {
150 WireguardIPmask
*start
, *last
= NULL
;
159 /* This returns 1 on success, 0 on recoverable error, and negative errno on failure. */
161 start
= *mask_start
?: peer
->ipmasks
;
163 r
= sd_netlink_message_open_array(message
, index
);
167 r
= sd_netlink_message_append_data(message
, WGPEER_A_PUBLIC_KEY
, &peer
->public_key
, sizeof(peer
->public_key
));
172 r
= sd_netlink_message_append_data(message
, WGPEER_A_PRESHARED_KEY
, &peer
->preshared_key
, WG_KEY_LEN
);
176 r
= sd_netlink_message_append_u32(message
, WGPEER_A_FLAGS
, peer
->flags
);
180 r
= sd_netlink_message_append_u16(message
, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL
, peer
->persistent_keepalive_interval
);
184 if (IN_SET(peer
->endpoint
.sa
.sa_family
, AF_INET
, AF_INET6
)) {
185 r
= netlink_message_append_sockaddr_union(message
, WGPEER_A_ENDPOINT
, &peer
->endpoint
);
191 r
= sd_netlink_message_open_container(message
, WGPEER_A_ALLOWEDIPS
);
195 LIST_FOREACH(ipmasks
, mask
, start
) {
196 r
= wireguard_set_ipmask_one(netdev
, message
, mask
, ++j
);
205 r
= sd_netlink_message_close_container(message
);
207 return log_netdev_error_errno(netdev
, r
, "Could not add wireguard allowed ip: %m");
209 r
= sd_netlink_message_close_container(message
);
211 return log_netdev_error_errno(netdev
, r
, "Could not add wireguard peer: %m");
213 *mask_start
= last
; /* Start next cycle from this mask. */
217 r
= sd_netlink_message_cancel_array(message
);
219 return log_netdev_error_errno(netdev
, r
, "Could not cancel wireguard peers: %m");
224 static int wireguard_set_interface(NetDev
*netdev
) {
225 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*message
= NULL
;
226 WireguardIPmask
*mask_start
= NULL
;
227 WireguardPeer
*peer_start
;
228 bool sent_once
= false;
234 w
= WIREGUARD(netdev
);
237 for (peer_start
= w
->peers
; peer_start
|| !sent_once
; ) {
240 message
= sd_netlink_message_unref(message
);
242 r
= sd_genl_message_new(netdev
->manager
->genl
, WG_GENL_NAME
, WG_CMD_SET_DEVICE
, &message
);
244 return log_netdev_error_errno(netdev
, r
, "Failed to allocate generic netlink message: %m");
246 r
= sd_netlink_message_append_string(message
, WGDEVICE_A_IFNAME
, netdev
->ifname
);
248 return log_netdev_error_errno(netdev
, r
, "Could not append wireguard interface name: %m");
250 if (peer_start
== w
->peers
) {
251 r
= sd_netlink_message_append_data(message
, WGDEVICE_A_PRIVATE_KEY
, &w
->private_key
, WG_KEY_LEN
);
253 return log_netdev_error_errno(netdev
, r
, "Could not append wireguard private key: %m");
255 r
= sd_netlink_message_append_u16(message
, WGDEVICE_A_LISTEN_PORT
, w
->port
);
257 return log_netdev_error_errno(netdev
, r
, "Could not append wireguard port: %m");
259 r
= sd_netlink_message_append_u32(message
, WGDEVICE_A_FWMARK
, w
->fwmark
);
261 return log_netdev_error_errno(netdev
, r
, "Could not append wireguard fwmark: %m");
263 r
= sd_netlink_message_append_u32(message
, WGDEVICE_A_FLAGS
, w
->flags
);
265 return log_netdev_error_errno(netdev
, r
, "Could not append wireguard flags: %m");
268 r
= sd_netlink_message_open_container(message
, WGDEVICE_A_PEERS
);
270 return log_netdev_error_errno(netdev
, r
, "Could not append wireguard peer attributes: %m");
272 WireguardPeer
*peer_last
= NULL
;
273 LIST_FOREACH(peers
, peer
, peer_start
) {
274 r
= wireguard_set_peer_one(netdev
, message
, peer
, ++i
, &mask_start
);
282 peer_start
= peer_last
; /* Start next cycle from this peer. */
284 r
= sd_netlink_message_close_container(message
);
286 return log_netdev_error_errno(netdev
, r
, "Could not close wireguard container: %m");
288 r
= sd_netlink_send(netdev
->manager
->genl
, message
, &serial
);
290 return log_netdev_error_errno(netdev
, r
, "Could not set wireguard device: %m");
298 static int on_resolve_retry(sd_event_source
*s
, usec_t usec
, void *userdata
) {
299 WireguardPeer
*peer
= userdata
;
303 assert(peer
->wireguard
);
305 netdev
= NETDEV(peer
->wireguard
);
307 if (!netdev_is_managed(netdev
))
310 peer
->resolve_query
= sd_resolve_query_unref(peer
->resolve_query
);
312 (void) peer_resolve_endpoint(peer
);
316 static usec_t
peer_next_resolve_usec(WireguardPeer
*peer
) {
319 /* Given the number of retries this function will return an exponential increasing amount of
320 * milliseconds to wait starting at 200ms and capped at 25 seconds. */
324 usec
= (2 << MIN(peer
->n_retries
, 7U)) * 100 * USEC_PER_MSEC
;
326 return random_u64_range(usec
/ 10) + usec
* 9 / 10;
329 static int wireguard_peer_resolve_handler(
332 const struct addrinfo
*ai
,
335 WireguardPeer
*peer
= userdata
;
340 assert(peer
->wireguard
);
342 netdev
= NETDEV(peer
->wireguard
);
344 if (!netdev_is_managed(netdev
))
348 log_netdev_warning(netdev
, "Failed to resolve host '%s:%s', ignoring: %s",
349 peer
->endpoint_host
, peer
->endpoint_port
, gai_strerror(ret
));
354 for (; ai
; ai
= ai
->ai_next
) {
355 if (!IN_SET(ai
->ai_family
, AF_INET
, AF_INET6
))
358 if (ai
->ai_addrlen
!= (ai
->ai_family
== AF_INET
? sizeof(struct sockaddr_in
) : sizeof(struct sockaddr_in6
)))
361 memcpy(&peer
->endpoint
, ai
->ai_addr
, ai
->ai_addrlen
);
362 (void) wireguard_set_interface(netdev
);
369 log_netdev_warning(netdev
, "Neither IPv4 nor IPv6 address found for peer endpoint %s:%s, ignoring the endpoint.",
370 peer
->endpoint_host
, peer
->endpoint_port
);
375 if (peer
->n_retries
> 0) {
376 r
= event_reset_time_relative(netdev
->manager
->event
,
377 &peer
->resolve_retry_event_source
,
379 peer_next_resolve_usec(peer
), 0,
380 on_resolve_retry
, peer
, 0, "wireguard-resolve-retry", true);
382 log_netdev_warning_errno(netdev
, r
, "Could not arm resolve retry handler for endpoint %s:%s, ignoring: %m",
383 peer
->endpoint_host
, peer
->endpoint_port
);
386 wireguard_resolve_endpoints(netdev
);
390 static int peer_resolve_endpoint(WireguardPeer
*peer
) {
391 static const struct addrinfo hints
= {
392 .ai_family
= AF_UNSPEC
,
393 .ai_socktype
= SOCK_DGRAM
,
394 .ai_protocol
= IPPROTO_UDP
400 assert(peer
->wireguard
);
402 netdev
= NETDEV(peer
->wireguard
);
404 if (!peer
->endpoint_host
|| !peer
->endpoint_port
)
405 /* Not necessary to resolve the endpoint. */
408 if (sd_event_source_get_enabled(peer
->resolve_retry_event_source
, NULL
) > 0)
409 /* Timer event source is enabled. The endpoint will be resolved later. */
412 if (peer
->resolve_query
)
413 /* Being resolved, or already resolved. */
416 r
= sd_resolve_getaddrinfo(netdev
->manager
->resolve
,
417 &peer
->resolve_query
,
421 wireguard_peer_resolve_handler
,
424 return log_netdev_full_errno(netdev
, r
== -ENOBUFS
? LOG_DEBUG
: LOG_WARNING
, r
,
425 "Failed to create endpoint resolver for %s:%s, ignoring: %m",
426 peer
->endpoint_host
, peer
->endpoint_port
);
431 static void wireguard_resolve_endpoints(NetDev
*netdev
) {
435 w
= WIREGUARD(netdev
);
438 LIST_FOREACH(peers
, peer
, w
->peers
)
439 if (peer_resolve_endpoint(peer
) == -ENOBUFS
)
440 /* Too many requests. Let's resolve remaining endpoints later. */
444 static int netdev_wireguard_post_create(NetDev
*netdev
, Link
*link
) {
446 assert(WIREGUARD(netdev
));
448 (void) wireguard_set_interface(netdev
);
449 wireguard_resolve_endpoints(netdev
);
453 int config_parse_wireguard_listen_port(
455 const char *filename
,
458 unsigned section_line
,
471 if (isempty(rvalue
) || streq(rvalue
, "auto")) {
476 r
= parse_ip_port(rvalue
, s
);
478 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
479 "Invalid port specification, ignoring assignment: %s", rvalue
);
486 static int wireguard_decode_key_and_warn(
488 uint8_t ret
[static WG_KEY_LEN
],
490 const char *filename
,
492 const char *lvalue
) {
494 _cleanup_(erase_and_freep
) void *key
= NULL
;
503 if (isempty(rvalue
)) {
504 memzero(ret
, WG_KEY_LEN
);
508 if (!streq(lvalue
, "PublicKey"))
509 (void) warn_file_is_world_accessible(filename
, NULL
, unit
, line
);
511 r
= unbase64mem_full(rvalue
, strlen(rvalue
), true, &key
, &len
);
515 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
516 "Failed to decode wireguard key provided by %s=, ignoring assignment: %m", lvalue
);
519 if (len
!= WG_KEY_LEN
) {
520 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0,
521 "Wireguard key provided by %s= has invalid length (%zu bytes), ignoring assignment.",
526 memcpy(ret
, key
, WG_KEY_LEN
);
530 int config_parse_wireguard_private_key(
532 const char *filename
,
535 unsigned section_line
,
548 return wireguard_decode_key_and_warn(rvalue
, w
->private_key
, unit
, filename
, line
, lvalue
);
551 int config_parse_wireguard_private_key_file(
553 const char *filename
,
556 unsigned section_line
,
563 _cleanup_free_
char *path
= NULL
;
570 if (isempty(rvalue
)) {
571 w
->private_key_file
= mfree(w
->private_key_file
);
575 path
= strdup(rvalue
);
579 if (path_simplify_and_warn(path
, PATH_CHECK_ABSOLUTE
, unit
, filename
, line
, lvalue
) < 0)
582 return free_and_replace(w
->private_key_file
, path
);
585 int config_parse_wireguard_peer_key(
587 const char *filename
,
590 unsigned section_line
,
597 _cleanup_(wireguard_peer_free_or_set_invalidp
) WireguardPeer
*peer
= NULL
;
605 r
= wireguard_peer_new_static(w
, filename
, section_line
, &peer
);
609 r
= wireguard_decode_key_and_warn(rvalue
,
610 streq(lvalue
, "PublicKey") ? peer
->public_key
: peer
->preshared_key
,
611 unit
, filename
, line
, lvalue
);
619 int config_parse_wireguard_preshared_key_file(
621 const char *filename
,
624 unsigned section_line
,
631 _cleanup_(wireguard_peer_free_or_set_invalidp
) WireguardPeer
*peer
= NULL
;
632 _cleanup_free_
char *path
= NULL
;
640 r
= wireguard_peer_new_static(w
, filename
, section_line
, &peer
);
644 if (isempty(rvalue
)) {
645 peer
->preshared_key_file
= mfree(peer
->preshared_key_file
);
650 path
= strdup(rvalue
);
654 if (path_simplify_and_warn(path
, PATH_CHECK_ABSOLUTE
, unit
, filename
, line
, lvalue
) < 0)
657 free_and_replace(peer
->preshared_key_file
, path
);
662 int config_parse_wireguard_allowed_ips(
664 const char *filename
,
667 unsigned section_line
,
674 _cleanup_(wireguard_peer_free_or_set_invalidp
) WireguardPeer
*peer
= NULL
;
675 union in_addr_union addr
;
676 unsigned char prefixlen
;
679 WireguardIPmask
*ipmask
;
687 r
= wireguard_peer_new_static(w
, filename
, section_line
, &peer
);
691 for (const char *p
= rvalue
;;) {
692 _cleanup_free_
char *word
= NULL
;
693 union in_addr_union masked
;
695 r
= extract_first_word(&p
, &word
, "," WHITESPACE
, 0);
701 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
702 "Failed to split allowed ips \"%s\" option: %m", rvalue
);
706 r
= in_addr_prefix_from_string_auto(word
, &family
, &addr
, &prefixlen
);
708 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
709 "Network address is invalid, ignoring assignment: %s", word
);
714 assert_se(in_addr_mask(family
, &masked
, prefixlen
) >= 0);
715 if (!in_addr_equal(family
, &masked
, &addr
))
716 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0,
717 "Specified address '%s' is not properly masked, assuming '%s'.",
719 IN_ADDR_PREFIX_TO_STRING(family
, &masked
, prefixlen
));
721 ipmask
= new(WireguardIPmask
, 1);
725 *ipmask
= (WireguardIPmask
) {
731 LIST_PREPEND(ipmasks
, peer
->ipmasks
, ipmask
);
738 int config_parse_wireguard_endpoint(
740 const char *filename
,
743 unsigned section_line
,
750 _cleanup_(wireguard_peer_free_or_set_invalidp
) WireguardPeer
*peer
= NULL
;
751 _cleanup_free_
char *host
= NULL
;
752 union in_addr_union addr
;
762 w
= WIREGUARD(userdata
);
765 r
= wireguard_peer_new_static(w
, filename
, section_line
, &peer
);
769 r
= in_addr_port_ifindex_name_from_string_auto(rvalue
, &family
, &addr
, &port
, NULL
, NULL
);
771 if (family
== AF_INET
)
772 peer
->endpoint
.in
= (struct sockaddr_in
) {
773 .sin_family
= AF_INET
,
775 .sin_port
= htobe16(port
),
777 else if (family
== AF_INET6
)
778 peer
->endpoint
.in6
= (struct sockaddr_in6
) {
779 .sin6_family
= AF_INET6
,
780 .sin6_addr
= addr
.in6
,
781 .sin6_port
= htobe16(port
),
784 assert_not_reached();
786 peer
->endpoint_host
= mfree(peer
->endpoint_host
);
787 peer
->endpoint_port
= mfree(peer
->endpoint_port
);
793 p
= strrchr(rvalue
, ':');
795 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0,
796 "Unable to find port of endpoint, ignoring assignment: %s",
801 host
= strndup(rvalue
, p
- rvalue
);
805 if (!dns_name_is_valid(host
)) {
806 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0,
807 "Invalid domain name of endpoint, ignoring assignment: %s",
813 r
= parse_ip_port(p
, &port
);
815 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
816 "Invalid port of endpoint, ignoring assignment: %s",
821 peer
->endpoint
= (union sockaddr_union
) {};
823 free_and_replace(peer
->endpoint_host
, host
);
825 r
= free_and_strdup(&peer
->endpoint_port
, p
);
829 TAKE_PTR(peer
); /* The peer may already have been in the hash map, that is fine too. */
833 int config_parse_wireguard_keepalive(
835 const char *filename
,
838 unsigned section_line
,
845 _cleanup_(wireguard_peer_free_or_set_invalidp
) WireguardPeer
*peer
= NULL
;
846 uint16_t keepalive
= 0;
856 r
= wireguard_peer_new_static(w
, filename
, section_line
, &peer
);
860 if (streq(rvalue
, "off"))
863 r
= safe_atou16(rvalue
, &keepalive
);
865 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
866 "Failed to parse \"%s\" as keepalive interval (range 0–65535), ignoring assignment: %m",
872 peer
->persistent_keepalive_interval
= keepalive
;
878 int config_parse_wireguard_route_table(
880 const char *filename
,
883 unsigned section_line
,
890 NetDev
*netdev
= userdata
;
891 uint32_t *table
= data
;
900 if (isempty(rvalue
) || parse_boolean(rvalue
) == 0) {
901 *table
= 0; /* Disabled. */
905 r
= manager_get_route_table_from_string(netdev
->manager
, rvalue
, table
);
907 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
908 "Failed to parse %s=, ignoring assignment: %s",
916 int config_parse_wireguard_peer_route_table(
918 const char *filename
,
921 unsigned section_line
,
928 _cleanup_(wireguard_peer_free_or_set_invalidp
) WireguardPeer
*peer
= NULL
;
929 NetDev
*netdev
= userdata
;
937 assert(netdev
->manager
);
939 w
= WIREGUARD(netdev
);
942 r
= wireguard_peer_new_static(w
, filename
, section_line
, &peer
);
946 if (isempty(rvalue
)) {
947 peer
->route_table_set
= false; /* Use the table specified in [WireGuard] section. */
952 if (parse_boolean(rvalue
) == 0) {
953 peer
->route_table
= 0; /* Disabled. */
954 peer
->route_table_set
= true;
959 r
= manager_get_route_table_from_string(netdev
->manager
, rvalue
, &peer
->route_table
);
961 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
962 "Failed to parse %s=, ignoring assignment: %s",
967 peer
->route_table_set
= true;
972 int config_parse_wireguard_route_priority(
974 const char *filename
,
977 unsigned section_line
,
984 uint32_t *priority
= data
;
992 if (isempty(rvalue
)) {
997 r
= safe_atou32(rvalue
, priority
);
999 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
1000 "Could not parse route priority \"%s\", ignoring assignment: %m", rvalue
);
1007 int config_parse_wireguard_peer_route_priority(
1009 const char *filename
,
1011 const char *section
,
1012 unsigned section_line
,
1019 _cleanup_(wireguard_peer_free_or_set_invalidp
) WireguardPeer
*peer
= NULL
;
1028 w
= WIREGUARD(userdata
);
1031 r
= wireguard_peer_new_static(w
, filename
, section_line
, &peer
);
1035 if (isempty(rvalue
)) {
1036 peer
->route_priority_set
= false; /* Use the priority specified in [WireGuard] section. */
1041 r
= safe_atou32(rvalue
, &peer
->route_priority
);
1043 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
1044 "Could not parse route priority \"%s\", ignoring assignment: %m", rvalue
);
1048 peer
->route_priority_set
= true;
1053 static void wireguard_init(NetDev
*netdev
) {
1057 w
= WIREGUARD(netdev
);
1060 w
->flags
= WGDEVICE_F_REPLACE_PEERS
;
1063 static void wireguard_done(NetDev
*netdev
) {
1067 w
= WIREGUARD(netdev
);
1070 explicit_bzero_safe(w
->private_key
, WG_KEY_LEN
);
1071 free(w
->private_key_file
);
1073 hashmap_free_with_destructor(w
->peers_by_section
, wireguard_peer_free
);
1075 set_free(w
->routes
);
1078 static int wireguard_read_key_file(const char *filename
, uint8_t dest
[static WG_KEY_LEN
]) {
1079 _cleanup_(erase_and_freep
) char *key
= NULL
;
1088 (void) warn_file_is_world_accessible(filename
, NULL
, NULL
, 0);
1090 r
= read_full_file_full(
1091 AT_FDCWD
, filename
, UINT64_MAX
, SIZE_MAX
,
1092 READ_FULL_FILE_SECURE
| READ_FULL_FILE_UNBASE64
| READ_FULL_FILE_WARN_WORLD_READABLE
| READ_FULL_FILE_CONNECT_SOCKET
,
1093 NULL
, &key
, &key_len
);
1097 if (key_len
!= WG_KEY_LEN
)
1100 memcpy(dest
, key
, WG_KEY_LEN
);
1104 static int wireguard_peer_verify(WireguardPeer
*peer
) {
1105 NetDev
*netdev
= NETDEV(peer
->wireguard
);
1108 if (section_is_invalid(peer
->section
))
1111 if (eqzero(peer
->public_key
))
1112 return log_netdev_error_errno(netdev
, SYNTHETIC_ERRNO(EINVAL
),
1113 "%s: WireGuardPeer section without PublicKey= configured. "
1114 "Ignoring [WireGuardPeer] section from line %u.",
1115 peer
->section
->filename
, peer
->section
->line
);
1117 r
= wireguard_read_key_file(peer
->preshared_key_file
, peer
->preshared_key
);
1119 return log_netdev_error_errno(netdev
, r
,
1120 "%s: Failed to read preshared key from '%s'. "
1121 "Ignoring [WireGuardPeer] section from line %u.",
1122 peer
->section
->filename
, peer
->preshared_key_file
,
1123 peer
->section
->line
);
1128 static int wireguard_verify(NetDev
*netdev
, const char *filename
) {
1133 w
= WIREGUARD(netdev
);
1136 r
= wireguard_read_key_file(w
->private_key_file
, w
->private_key
);
1138 return log_netdev_error_errno(netdev
, r
,
1139 "Failed to read private key from %s. Ignoring network device.",
1140 w
->private_key_file
);
1142 if (eqzero(w
->private_key
))
1143 return log_netdev_error_errno(netdev
, SYNTHETIC_ERRNO(EINVAL
),
1144 "%s: Missing PrivateKey= or PrivateKeyFile=, "
1145 "Ignoring network device.", filename
);
1147 LIST_FOREACH(peers
, peer
, w
->peers
) {
1148 if (wireguard_peer_verify(peer
) < 0) {
1149 wireguard_peer_free(peer
);
1153 if ((peer
->route_table_set
? peer
->route_table
: w
->route_table
) == 0)
1156 LIST_FOREACH(ipmasks
, ipmask
, peer
->ipmasks
) {
1157 _cleanup_(route_freep
) Route
*route
= NULL
;
1159 r
= route_new(&route
);
1163 route
->family
= ipmask
->family
;
1164 route
->dst
= ipmask
->ip
;
1165 route
->dst_prefixlen
= ipmask
->cidr
;
1166 route
->scope
= RT_SCOPE_UNIVERSE
;
1167 route
->protocol
= RTPROT_STATIC
;
1168 route
->table
= peer
->route_table_set
? peer
->route_table
: w
->route_table
;
1169 route
->priority
= peer
->route_priority_set
? peer
->route_priority
: w
->route_priority
;
1170 if (route
->priority
== 0 && route
->family
== AF_INET6
)
1171 route
->priority
= IP6_RT_PRIO_USER
;
1172 route
->source
= NETWORK_CONFIG_SOURCE_STATIC
;
1174 r
= set_ensure_consume(&w
->routes
, &route_hash_ops
, TAKE_PTR(route
));
1183 const NetDevVTable wireguard_vtable
= {
1184 .object_size
= sizeof(Wireguard
),
1185 .sections
= NETDEV_COMMON_SECTIONS
"WireGuard\0WireGuardPeer\0",
1186 .post_create
= netdev_wireguard_post_create
,
1187 .init
= wireguard_init
,
1188 .done
= wireguard_done
,
1189 .create_type
= NETDEV_CREATE_INDEPENDENT
,
1190 .config_verify
= wireguard_verify
,
1191 .iftype
= ARPHRD_NONE
,