Abstract address allocation based on netlink attribute

2 files changed, 16 insertions, 0 deletions

diff --git a/include/netlink/addr.h b/include/netlink/addr.h
index 25fce7e..8464a0c 100644
--- a/include/netlink/addr.h
+++ b/include/netlink/addr.h
@@ -22,6 +22,7 @@ struct nl_addr;
 
 /* Creation */
 extern struct nl_addr *	nl_addr_alloc(size_t);
+extern struct nl_addr *	nl_addr_alloc_from_attr(struct nlattr *, int);
 extern struct nl_addr *	nl_addr_build(int, void *, size_t);
 extern struct nl_addr *	nl_addr_parse(const char *, int);
 extern struct nl_addr *	nl_addr_clone(struct nl_addr *);
diff --git a/lib/addr.c b/lib/addr.c
index 68f7741..70e4b1d 100644
--- a/lib/addr.c
+++ b/lib/addr.c
@@ -203,6 +203,21 @@ struct nl_addr *nl_addr_build(int family, void *buf, size_t size)
 }
 
 /**
+ * Allocate abstract address based on netlink attribute.
+ * @arg nla		Netlink attribute of unspecific type.
+ * @arg family		Address family.
+ *
+ * Considers the netlink attribute payload a address of the specified
+ * family and allocates a new abstract address based on it.
+ *
+ * @return Newly allocated address handle or NULL.
+ */
+struct nl_addr *nl_addr_alloc_from_attr(struct nlattr *nla, int family)
+{
+	return nl_addr_build(family, nla_data(nla), nla_len(nla));
+}
+
+/**
  * Allocate abstract address object based on a character string
  * @arg addrstr		Address represented as character string.
  * @arg hint		Address family hint or AF_UNSPEC.