Merge pull request #11580 from yuwata/fix-11579

network/wireguard: fix sending wireguard peers

src/libsystemd/sd-netlink/netlink-message.c

@@ -370,6 +370,42 @@ int sd_netlink_message_append_in6_addr(sd_netlink_message *m, unsigned short typ
         return 0;
 }
 
+int sd_netlink_message_append_sockaddr_in(sd_netlink_message *m, unsigned short type, const struct sockaddr_in *data) {
+        int r;
+
+        assert_return(m, -EINVAL);
+        assert_return(!m->sealed, -EPERM);
+        assert_return(data, -EINVAL);
+
+        r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_SOCKADDR);
+        if (r < 0)
+                return r;
+
+        r = add_rtattr(m, type, data, sizeof(struct sockaddr_in));
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int sd_netlink_message_append_sockaddr_in6(sd_netlink_message *m, unsigned short type, const struct sockaddr_in6 *data) {
+        int r;
+
+        assert_return(m, -EINVAL);
+        assert_return(!m->sealed, -EPERM);
+        assert_return(data, -EINVAL);
+
+        r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_SOCKADDR);
+        if (r < 0)
+                return r;
+
+        r = add_rtattr(m, type, data, sizeof(struct sockaddr_in6));
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
 int sd_netlink_message_append_ether_addr(sd_netlink_message *m, unsigned short type, const struct ether_addr *data) {
         int r;
 

src/libsystemd/sd-netlink/netlink-types.c

@@ -721,7 +721,7 @@ static const NLType genl_wireguard_peer_types[] = {
         [WGPEER_A_FLAGS] = { .type = NETLINK_TYPE_U32 },
         [WGPEER_A_PRESHARED_KEY] = { .size = WG_KEY_LEN },
         [WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL] = { .type = NETLINK_TYPE_U16 },
-        [WGPEER_A_ENDPOINT] = { /* either size of sockaddr_in or sockaddr_in6 depending on address family */ },
+        [WGPEER_A_ENDPOINT] = { .type = NETLINK_TYPE_SOCKADDR },
         [WGPEER_A_ALLOWEDIPS] = { .type = NETLINK_TYPE_NESTED, .type_system = &genl_wireguard_allowedip_type_system },
 };
 

src/libsystemd/sd-netlink/netlink-types.h

@@ -16,6 +16,7 @@ enum {
         NETLINK_TYPE_CACHE_INFO,
         NETLINK_TYPE_NESTED,                    /* NLA_NESTED */
         NETLINK_TYPE_UNION,
+        NETLINK_TYPE_SOCKADDR,
 };
 
 typedef enum NLMatchType {

src/network/netdev/wireguard.c

@@ -109,7 +109,7 @@ static int wireguard_set_peer_one(NetDev *netdev, sd_netlink_message *message, c
         if (r < 0)
                 goto cancel;
 
-        if (!start) {
+        if (!*mask_start) {
                 r = sd_netlink_message_append_data(message, WGPEER_A_PRESHARED_KEY, &peer->preshared_key, WG_KEY_LEN);
                 if (r < 0)
                         goto cancel;
@@ -123,9 +123,9 @@ static int wireguard_set_peer_one(NetDev *netdev, sd_netlink_message *message, c
                         goto cancel;
 
                 if (peer->endpoint.sa.sa_family == AF_INET)
-                        r = sd_netlink_message_append_data(message, WGPEER_A_ENDPOINT, &peer->endpoint.in, sizeof(peer->endpoint.in));
+                        r = sd_netlink_message_append_sockaddr_in(message, WGPEER_A_ENDPOINT, &peer->endpoint.in);
                 else if (peer->endpoint.sa.sa_family == AF_INET6)
-                        r = sd_netlink_message_append_data(message, WGPEER_A_ENDPOINT, &peer->endpoint.in6, sizeof(peer->endpoint.in6));
+                        r = sd_netlink_message_append_sockaddr_in6(message, WGPEER_A_ENDPOINT, &peer->endpoint.in6);
                 if (r < 0)
                         goto cancel;
         }

src/systemd/sd-netlink.h

@@ -78,6 +78,8 @@ int sd_netlink_message_append_u32(sd_netlink_message *m, unsigned short type, ui
 int sd_netlink_message_append_data(sd_netlink_message *m, unsigned short type, const void *data, size_t len);
 int sd_netlink_message_append_in_addr(sd_netlink_message *m, unsigned short type, const struct in_addr *data);
 int sd_netlink_message_append_in6_addr(sd_netlink_message *m, unsigned short type, const struct in6_addr *data);
+int sd_netlink_message_append_sockaddr_in(sd_netlink_message *m, unsigned short type, const struct sockaddr_in *data);
+int sd_netlink_message_append_sockaddr_in6(sd_netlink_message *m, unsigned short type, const struct sockaddr_in6 *data);
 int sd_netlink_message_append_ether_addr(sd_netlink_message *m, unsigned short type, const struct ether_addr *data);
 int sd_netlink_message_append_cache_info(sd_netlink_message *m, unsigned short type, const struct ifa_cacheinfo *info);
 

test/test-network/conf/25-wireguard.netdev

@@ -10,6 +10,7 @@ FwMark=1234
 [WireGuardPeer]
 PublicKey=RDf+LSpeEre7YEIKaxg+wbpsNV7du+ktR99uBEtIiCA=
 AllowedIPs=fd31:bf08:57cb::/48,192.168.26.0/24
-Endpoint=wireguard.example.com:51820
+#Endpoint=wireguard.example.com:51820
+Endpoint=192.168.27.3:51820
 PresharedKey=IIWIV17wutHv7t4cR6pOT91z6NSz/T8Arh0yaywhw3M=
 PersistentKeepalive=20

test/test-network/systemd-networkd-tests.py

@@ -390,6 +390,16 @@ class NetworkdNetDevTests(unittest.TestCase, Utilities):
 
         if shutil.which('wg'):
             subprocess.call('wg')
+            output = subprocess.check_output(['wg', 'show', 'wg99', 'listen-port']).rstrip().decode('utf-8')
+            self.assertTrue(output, '51820')
+            output = subprocess.check_output(['wg', 'show', 'wg99', 'fwmark']).rstrip().decode('utf-8')
+            self.assertTrue(output, '0x4d2')
+            output = subprocess.check_output(['wg', 'show', 'wg99', 'allowed-ips']).rstrip().decode('utf-8')
+            self.assertTrue(output, 'RDf+LSpeEre7YEIKaxg+wbpsNV7du+ktR99uBEtIiCA=\t192.168.26.0/24 fd31:bf08:57cb::/48')
+            output = subprocess.check_output(['wg', 'show', 'wg99', 'persistent-keepalive']).rstrip().decode('utf-8')
+            self.assertTrue(output, 'RDf+LSpeEre7YEIKaxg+wbpsNV7du+ktR99uBEtIiCA=\t20')
+            output = subprocess.check_output(['wg', 'show', 'wg99', 'endpoints']).rstrip().decode('utf-8')
+            self.assertTrue(output, 'RDf+LSpeEre7YEIKaxg+wbpsNV7du+ktR99uBEtIiCA=\t192.168.27.3:51820')
 
         self.assertTrue(self.link_exits('wg99'))