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
= ASSERT_PTR(userdata
);
302 assert(peer
->wireguard
);
304 netdev
= NETDEV(peer
->wireguard
);
306 if (!netdev_is_managed(netdev
))
309 peer
->resolve_query
= sd_resolve_query_unref(peer
->resolve_query
);
311 (void) peer_resolve_endpoint(peer
);
315 static usec_t
peer_next_resolve_usec(WireguardPeer
*peer
) {
318 /* Given the number of retries this function will return an exponential increasing amount of
319 * milliseconds to wait starting at 200ms and capped at 25 seconds. */
323 usec
= (2 << MIN(peer
->n_retries
, 7U)) * 100 * USEC_PER_MSEC
;
325 return random_u64_range(usec
/ 10) + usec
* 9 / 10;
328 static int wireguard_peer_resolve_handler(
331 const struct addrinfo
*ai
,
334 WireguardPeer
*peer
= ASSERT_PTR(userdata
);
338 assert(peer
->wireguard
);
340 netdev
= NETDEV(peer
->wireguard
);
342 if (!netdev_is_managed(netdev
))
346 log_netdev_warning(netdev
, "Failed to resolve host '%s:%s', ignoring: %s",
347 peer
->endpoint_host
, peer
->endpoint_port
, gai_strerror(ret
));
352 for (; ai
; ai
= ai
->ai_next
) {
353 if (!IN_SET(ai
->ai_family
, AF_INET
, AF_INET6
))
356 if (ai
->ai_addrlen
!= (ai
->ai_family
== AF_INET
? sizeof(struct sockaddr_in
) : sizeof(struct sockaddr_in6
)))
359 memcpy(&peer
->endpoint
, ai
->ai_addr
, ai
->ai_addrlen
);
360 (void) wireguard_set_interface(netdev
);
367 log_netdev_warning(netdev
, "Neither IPv4 nor IPv6 address found for peer endpoint %s:%s, ignoring the endpoint.",
368 peer
->endpoint_host
, peer
->endpoint_port
);
373 if (peer
->n_retries
> 0) {
374 r
= event_reset_time_relative(netdev
->manager
->event
,
375 &peer
->resolve_retry_event_source
,
377 peer_next_resolve_usec(peer
), 0,
378 on_resolve_retry
, peer
, 0, "wireguard-resolve-retry", true);
380 log_netdev_warning_errno(netdev
, r
, "Could not arm resolve retry handler for endpoint %s:%s, ignoring: %m",
381 peer
->endpoint_host
, peer
->endpoint_port
);
384 wireguard_resolve_endpoints(netdev
);
388 static int peer_resolve_endpoint(WireguardPeer
*peer
) {
389 static const struct addrinfo hints
= {
390 .ai_family
= AF_UNSPEC
,
391 .ai_socktype
= SOCK_DGRAM
,
392 .ai_protocol
= IPPROTO_UDP
398 assert(peer
->wireguard
);
400 netdev
= NETDEV(peer
->wireguard
);
402 if (!peer
->endpoint_host
|| !peer
->endpoint_port
)
403 /* Not necessary to resolve the endpoint. */
406 if (sd_event_source_get_enabled(peer
->resolve_retry_event_source
, NULL
) > 0)
407 /* Timer event source is enabled. The endpoint will be resolved later. */
410 if (peer
->resolve_query
)
411 /* Being resolved, or already resolved. */
414 r
= sd_resolve_getaddrinfo(netdev
->manager
->resolve
,
415 &peer
->resolve_query
,
419 wireguard_peer_resolve_handler
,
422 return log_netdev_full_errno(netdev
, r
== -ENOBUFS
? LOG_DEBUG
: LOG_WARNING
, r
,
423 "Failed to create endpoint resolver for %s:%s, ignoring: %m",
424 peer
->endpoint_host
, peer
->endpoint_port
);
429 static void wireguard_resolve_endpoints(NetDev
*netdev
) {
433 w
= WIREGUARD(netdev
);
436 LIST_FOREACH(peers
, peer
, w
->peers
)
437 if (peer_resolve_endpoint(peer
) == -ENOBUFS
)
438 /* Too many requests. Let's resolve remaining endpoints later. */
442 static int netdev_wireguard_post_create(NetDev
*netdev
, Link
*link
) {
444 assert(WIREGUARD(netdev
));
446 (void) wireguard_set_interface(netdev
);
447 wireguard_resolve_endpoints(netdev
);
451 int config_parse_wireguard_listen_port(
453 const char *filename
,
456 unsigned section_line
,
463 uint16_t *s
= ASSERT_PTR(data
);
468 if (isempty(rvalue
) || streq(rvalue
, "auto")) {
473 r
= parse_ip_port(rvalue
, s
);
475 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
476 "Invalid port specification, ignoring assignment: %s", rvalue
);
483 static int wireguard_decode_key_and_warn(
485 uint8_t ret
[static WG_KEY_LEN
],
487 const char *filename
,
489 const char *lvalue
) {
491 _cleanup_(erase_and_freep
) void *key
= NULL
;
500 if (isempty(rvalue
)) {
501 memzero(ret
, WG_KEY_LEN
);
505 if (!streq(lvalue
, "PublicKey"))
506 (void) warn_file_is_world_accessible(filename
, NULL
, unit
, line
);
508 r
= unbase64mem_full(rvalue
, strlen(rvalue
), true, &key
, &len
);
512 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
513 "Failed to decode wireguard key provided by %s=, ignoring assignment: %m", lvalue
);
516 if (len
!= WG_KEY_LEN
) {
517 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0,
518 "Wireguard key provided by %s= has invalid length (%zu bytes), ignoring assignment.",
523 memcpy(ret
, key
, WG_KEY_LEN
);
527 int config_parse_wireguard_private_key(
529 const char *filename
,
532 unsigned section_line
,
545 return wireguard_decode_key_and_warn(rvalue
, w
->private_key
, unit
, filename
, line
, lvalue
);
548 int config_parse_wireguard_private_key_file(
550 const char *filename
,
553 unsigned section_line
,
560 _cleanup_free_
char *path
= NULL
;
567 if (isempty(rvalue
)) {
568 w
->private_key_file
= mfree(w
->private_key_file
);
572 path
= strdup(rvalue
);
576 if (path_simplify_and_warn(path
, PATH_CHECK_ABSOLUTE
, unit
, filename
, line
, lvalue
) < 0)
579 return free_and_replace(w
->private_key_file
, path
);
582 int config_parse_wireguard_peer_key(
584 const char *filename
,
587 unsigned section_line
,
594 _cleanup_(wireguard_peer_free_or_set_invalidp
) WireguardPeer
*peer
= NULL
;
602 r
= wireguard_peer_new_static(w
, filename
, section_line
, &peer
);
606 r
= wireguard_decode_key_and_warn(rvalue
,
607 streq(lvalue
, "PublicKey") ? peer
->public_key
: peer
->preshared_key
,
608 unit
, filename
, line
, lvalue
);
616 int config_parse_wireguard_preshared_key_file(
618 const char *filename
,
621 unsigned section_line
,
628 _cleanup_(wireguard_peer_free_or_set_invalidp
) WireguardPeer
*peer
= NULL
;
629 _cleanup_free_
char *path
= NULL
;
637 r
= wireguard_peer_new_static(w
, filename
, section_line
, &peer
);
641 if (isempty(rvalue
)) {
642 peer
->preshared_key_file
= mfree(peer
->preshared_key_file
);
647 path
= strdup(rvalue
);
651 if (path_simplify_and_warn(path
, PATH_CHECK_ABSOLUTE
, unit
, filename
, line
, lvalue
) < 0)
654 free_and_replace(peer
->preshared_key_file
, path
);
659 int config_parse_wireguard_allowed_ips(
661 const char *filename
,
664 unsigned section_line
,
671 _cleanup_(wireguard_peer_free_or_set_invalidp
) WireguardPeer
*peer
= NULL
;
672 union in_addr_union addr
;
673 unsigned char prefixlen
;
676 WireguardIPmask
*ipmask
;
684 r
= wireguard_peer_new_static(w
, filename
, section_line
, &peer
);
688 for (const char *p
= rvalue
;;) {
689 _cleanup_free_
char *word
= NULL
;
690 union in_addr_union masked
;
692 r
= extract_first_word(&p
, &word
, "," WHITESPACE
, 0);
698 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
699 "Failed to split allowed ips \"%s\" option: %m", rvalue
);
703 r
= in_addr_prefix_from_string_auto(word
, &family
, &addr
, &prefixlen
);
705 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
706 "Network address is invalid, ignoring assignment: %s", word
);
711 assert_se(in_addr_mask(family
, &masked
, prefixlen
) >= 0);
712 if (!in_addr_equal(family
, &masked
, &addr
))
713 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0,
714 "Specified address '%s' is not properly masked, assuming '%s'.",
716 IN_ADDR_PREFIX_TO_STRING(family
, &masked
, prefixlen
));
718 ipmask
= new(WireguardIPmask
, 1);
722 *ipmask
= (WireguardIPmask
) {
728 LIST_PREPEND(ipmasks
, peer
->ipmasks
, ipmask
);
735 int config_parse_wireguard_endpoint(
737 const char *filename
,
740 unsigned section_line
,
747 _cleanup_(wireguard_peer_free_or_set_invalidp
) WireguardPeer
*peer
= NULL
;
748 _cleanup_free_
char *host
= NULL
;
749 union in_addr_union addr
;
759 w
= WIREGUARD(userdata
);
762 r
= wireguard_peer_new_static(w
, filename
, section_line
, &peer
);
766 r
= in_addr_port_ifindex_name_from_string_auto(rvalue
, &family
, &addr
, &port
, NULL
, NULL
);
768 if (family
== AF_INET
)
769 peer
->endpoint
.in
= (struct sockaddr_in
) {
770 .sin_family
= AF_INET
,
772 .sin_port
= htobe16(port
),
774 else if (family
== AF_INET6
)
775 peer
->endpoint
.in6
= (struct sockaddr_in6
) {
776 .sin6_family
= AF_INET6
,
777 .sin6_addr
= addr
.in6
,
778 .sin6_port
= htobe16(port
),
781 assert_not_reached();
783 peer
->endpoint_host
= mfree(peer
->endpoint_host
);
784 peer
->endpoint_port
= mfree(peer
->endpoint_port
);
790 p
= strrchr(rvalue
, ':');
792 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0,
793 "Unable to find port of endpoint, ignoring assignment: %s",
798 host
= strndup(rvalue
, p
- rvalue
);
802 if (!dns_name_is_valid(host
)) {
803 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0,
804 "Invalid domain name of endpoint, ignoring assignment: %s",
810 r
= parse_ip_port(p
, &port
);
812 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
813 "Invalid port of endpoint, ignoring assignment: %s",
818 peer
->endpoint
= (union sockaddr_union
) {};
820 free_and_replace(peer
->endpoint_host
, host
);
822 r
= free_and_strdup(&peer
->endpoint_port
, p
);
826 TAKE_PTR(peer
); /* The peer may already have been in the hash map, that is fine too. */
830 int config_parse_wireguard_keepalive(
832 const char *filename
,
835 unsigned section_line
,
842 _cleanup_(wireguard_peer_free_or_set_invalidp
) WireguardPeer
*peer
= NULL
;
843 uint16_t keepalive
= 0;
853 r
= wireguard_peer_new_static(w
, filename
, section_line
, &peer
);
857 if (streq(rvalue
, "off"))
860 r
= safe_atou16(rvalue
, &keepalive
);
862 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
863 "Failed to parse \"%s\" as keepalive interval (range 0–65535), ignoring assignment: %m",
869 peer
->persistent_keepalive_interval
= keepalive
;
875 int config_parse_wireguard_route_table(
877 const char *filename
,
880 unsigned section_line
,
887 NetDev
*netdev
= ASSERT_PTR(userdata
);
888 uint32_t *table
= ASSERT_PTR(data
);
895 if (isempty(rvalue
) || parse_boolean(rvalue
) == 0) {
896 *table
= 0; /* Disabled. */
900 r
= manager_get_route_table_from_string(netdev
->manager
, rvalue
, table
);
902 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
903 "Failed to parse %s=, ignoring assignment: %s",
911 int config_parse_wireguard_peer_route_table(
913 const char *filename
,
916 unsigned section_line
,
923 _cleanup_(wireguard_peer_free_or_set_invalidp
) WireguardPeer
*peer
= NULL
;
924 NetDev
*netdev
= ASSERT_PTR(userdata
);
931 assert(netdev
->manager
);
933 w
= WIREGUARD(netdev
);
936 r
= wireguard_peer_new_static(w
, filename
, section_line
, &peer
);
940 if (isempty(rvalue
)) {
941 peer
->route_table_set
= false; /* Use the table specified in [WireGuard] section. */
946 if (parse_boolean(rvalue
) == 0) {
947 peer
->route_table
= 0; /* Disabled. */
948 peer
->route_table_set
= true;
953 r
= manager_get_route_table_from_string(netdev
->manager
, rvalue
, &peer
->route_table
);
955 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
956 "Failed to parse %s=, ignoring assignment: %s",
961 peer
->route_table_set
= true;
966 int config_parse_wireguard_route_priority(
968 const char *filename
,
971 unsigned section_line
,
978 uint32_t *priority
= ASSERT_PTR(data
);
985 if (isempty(rvalue
)) {
990 r
= safe_atou32(rvalue
, priority
);
992 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
993 "Could not parse route priority \"%s\", ignoring assignment: %m", rvalue
);
1000 int config_parse_wireguard_peer_route_priority(
1002 const char *filename
,
1004 const char *section
,
1005 unsigned section_line
,
1012 _cleanup_(wireguard_peer_free_or_set_invalidp
) WireguardPeer
*peer
= NULL
;
1021 w
= WIREGUARD(userdata
);
1024 r
= wireguard_peer_new_static(w
, filename
, section_line
, &peer
);
1028 if (isempty(rvalue
)) {
1029 peer
->route_priority_set
= false; /* Use the priority specified in [WireGuard] section. */
1034 r
= safe_atou32(rvalue
, &peer
->route_priority
);
1036 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
1037 "Could not parse route priority \"%s\", ignoring assignment: %m", rvalue
);
1041 peer
->route_priority_set
= true;
1046 static void wireguard_init(NetDev
*netdev
) {
1050 w
= WIREGUARD(netdev
);
1053 w
->flags
= WGDEVICE_F_REPLACE_PEERS
;
1056 static void wireguard_done(NetDev
*netdev
) {
1060 w
= WIREGUARD(netdev
);
1063 explicit_bzero_safe(w
->private_key
, WG_KEY_LEN
);
1064 free(w
->private_key_file
);
1066 hashmap_free_with_destructor(w
->peers_by_section
, wireguard_peer_free
);
1068 set_free(w
->routes
);
1071 static int wireguard_read_key_file(const char *filename
, uint8_t dest
[static WG_KEY_LEN
]) {
1072 _cleanup_(erase_and_freep
) char *key
= NULL
;
1081 r
= read_full_file_full(
1082 AT_FDCWD
, filename
, UINT64_MAX
, SIZE_MAX
,
1083 READ_FULL_FILE_SECURE
| READ_FULL_FILE_UNBASE64
| READ_FULL_FILE_WARN_WORLD_READABLE
| READ_FULL_FILE_CONNECT_SOCKET
,
1084 NULL
, &key
, &key_len
);
1088 if (key_len
!= WG_KEY_LEN
)
1091 memcpy(dest
, key
, WG_KEY_LEN
);
1095 static int wireguard_peer_verify(WireguardPeer
*peer
) {
1096 NetDev
*netdev
= NETDEV(peer
->wireguard
);
1099 if (section_is_invalid(peer
->section
))
1102 if (eqzero(peer
->public_key
))
1103 return log_netdev_error_errno(netdev
, SYNTHETIC_ERRNO(EINVAL
),
1104 "%s: WireGuardPeer section without PublicKey= configured. "
1105 "Ignoring [WireGuardPeer] section from line %u.",
1106 peer
->section
->filename
, peer
->section
->line
);
1108 r
= wireguard_read_key_file(peer
->preshared_key_file
, peer
->preshared_key
);
1110 return log_netdev_error_errno(netdev
, r
,
1111 "%s: Failed to read preshared key from '%s'. "
1112 "Ignoring [WireGuardPeer] section from line %u.",
1113 peer
->section
->filename
, peer
->preshared_key_file
,
1114 peer
->section
->line
);
1119 static int wireguard_verify(NetDev
*netdev
, const char *filename
) {
1124 w
= WIREGUARD(netdev
);
1127 r
= wireguard_read_key_file(w
->private_key_file
, w
->private_key
);
1129 return log_netdev_error_errno(netdev
, r
,
1130 "Failed to read private key from %s. Ignoring network device.",
1131 w
->private_key_file
);
1133 if (eqzero(w
->private_key
))
1134 return log_netdev_error_errno(netdev
, SYNTHETIC_ERRNO(EINVAL
),
1135 "%s: Missing PrivateKey= or PrivateKeyFile=, "
1136 "Ignoring network device.", filename
);
1138 LIST_FOREACH(peers
, peer
, w
->peers
) {
1139 if (wireguard_peer_verify(peer
) < 0) {
1140 wireguard_peer_free(peer
);
1144 if ((peer
->route_table_set
? peer
->route_table
: w
->route_table
) == 0)
1147 LIST_FOREACH(ipmasks
, ipmask
, peer
->ipmasks
) {
1148 _cleanup_(route_freep
) Route
*route
= NULL
;
1150 r
= route_new(&route
);
1154 route
->family
= ipmask
->family
;
1155 route
->dst
= ipmask
->ip
;
1156 route
->dst_prefixlen
= ipmask
->cidr
;
1157 route
->scope
= RT_SCOPE_UNIVERSE
;
1158 route
->protocol
= RTPROT_STATIC
;
1159 route
->table
= peer
->route_table_set
? peer
->route_table
: w
->route_table
;
1160 route
->priority
= peer
->route_priority_set
? peer
->route_priority
: w
->route_priority
;
1161 if (route
->priority
== 0 && route
->family
== AF_INET6
)
1162 route
->priority
= IP6_RT_PRIO_USER
;
1163 route
->source
= NETWORK_CONFIG_SOURCE_STATIC
;
1165 r
= set_ensure_consume(&w
->routes
, &route_hash_ops
, TAKE_PTR(route
));
1174 const NetDevVTable wireguard_vtable
= {
1175 .object_size
= sizeof(Wireguard
),
1176 .sections
= NETDEV_COMMON_SECTIONS
"WireGuard\0WireGuardPeer\0",
1177 .post_create
= netdev_wireguard_post_create
,
1178 .init
= wireguard_init
,
1179 .done
= wireguard_done
,
1180 .create_type
= NETDEV_CREATE_INDEPENDENT
,
1181 .config_verify
= wireguard_verify
,
1182 .iftype
= ARPHRD_NONE
,