platform: add support for 6LoWPAN links

The 6LoWPAN devices tunnel IPv6 over IEEE 802.14.5 WPAN links.
They are software devices without any interesting properties but the
parent linke.

2 files changed, 77 insertions, 0 deletions

diff --git a/src/platform/nm-platform.c b/src/platform/nm-platform.c
index 3acdb7db2a..1fcb4d79c5 100644
--- a/src/platform/nm-platform.c
+++ b/src/platform/nm-platform.c
@@ -2088,6 +2088,70 @@ nm_platform_link_tun_add (NMPlatform *self,
 	return NM_PLATFORM_ERROR_SUCCESS;
 }
 
+/**
+ * nm_platform_6lowpan_add:
+ * @self: platform instance
+ * @parent: parent link
+ * @name: name of the new interface
+ * @out_link: on success, the link object
+ *
+ * Create a 6LoWPAN interface.
+ */
+NMPlatformError
+nm_platform_link_6lowpan_add (NMPlatform *self,
+                              const char *name,
+                              int parent,
+                              const NMPlatformLink **out_link)
+{
+	NMPlatformError plerr;
+
+	_CHECK_SELF (self, klass, NM_PLATFORM_ERROR_BUG);
+
+	g_return_val_if_fail (name, NM_PLATFORM_ERROR_BUG);
+
+	plerr = _link_add_check_existing (self, name, NM_LINK_TYPE_6LOWPAN, out_link);
+	if (plerr != NM_PLATFORM_ERROR_SUCCESS)
+		return plerr;
+
+	_LOGD ("adding 6lowpan '%s' parent %u", name, parent);
+
+	if (!klass->link_6lowpan_add (self, name, parent, out_link))
+		return NM_PLATFORM_ERROR_UNSPECIFIED;
+	return NM_PLATFORM_ERROR_SUCCESS;
+}
+
+gboolean
+nm_platform_link_6lowpan_get_properties (NMPlatform *self, int ifindex, int *out_parent)
+{
+	const NMPlatformLink *plink;
+	_CHECK_SELF (self, klass, FALSE);
+
+	plink = nm_platform_link_get (self, ifindex);
+
+	if (!plink)
+		return FALSE;
+	if (plink->type != NM_LINK_TYPE_6LOWPAN)
+		return FALSE;
+
+	if (plink->parent != 0) {
+		NM_SET_OUT (out_parent, plink->parent);
+		return TRUE;
+	}
+
+	/* As of 4.16 kernel does not expose the peer_ifindex as IFA_LINK.
+	 * Find the WPAN device with the same MAC address. */
+	if (out_parent) {
+		const NMPlatformLink *parent_plink;
+
+		parent_plink = nm_platform_link_get_by_address (self, NM_LINK_TYPE_WPAN,
+		                                                plink->addr.data,
+		                                                plink->addr.len);
+		NM_SET_OUT (out_parent, parent_plink ? parent_plink->ifindex : -1);
+	}
+
+	return TRUE;
+}
+
 /*****************************************************************************/
 
 static gboolean
@@ -2539,6 +2603,7 @@ nm_platform_link_ipip_add (NMPlatform *self,
  * nm_platform_macsec_add:
  * @self: platform instance
  * @name: name of the new interface
+ * @parent: parent link
  * @props: interface properties
  * @out_link: on success, the link object
  *
diff --git a/src/platform/nm-platform.h b/src/platform/nm-platform.h
index 435cb905c2..986df9b63f 100644
--- a/src/platform/nm-platform.h
+++ b/src/platform/nm-platform.h
@@ -854,6 +854,11 @@ typedef struct {
 	                          const NMPlatformLink **out_link,
 	                          int *out_fd);
 
+	gboolean (*link_6lowpan_add) (NMPlatform *platform,
+	                              const char *name,
+	                              int parent,
+	                              const NMPlatformLink **out_link);
+
 	gboolean (*infiniband_partition_add) (NMPlatform *, int parent, int p_key, const NMPlatformLink **out_link);
 	gboolean (*infiniband_partition_delete) (NMPlatform *, int parent, int p_key);
 
@@ -1301,6 +1306,13 @@ NMPlatformError nm_platform_link_tun_add (NMPlatform *self,
                                           const NMPlatformLnkTun *props,
                                           const NMPlatformLink **out_link,
                                           int *out_fd);
+NMPlatformError nm_platform_link_6lowpan_add (NMPlatform *self,
+                                              const char *name,
+                                              int parent,
+                                              const NMPlatformLink **out_link);
+gboolean nm_platform_link_6lowpan_get_properties (NMPlatform *self,
+                                                  int ifindex,
+                                                  int *out_parent);
 
 const NMPlatformIP6Address *nm_platform_ip6_address_get (NMPlatform *self, int ifindex, struct in6_addr address);