X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fnetlink.h;h=7eced42f42a660f178ccdb28548240c00179e70c;hb=b5d29991cc4722aec39c346c3f82291581e92aa0;hp=188a96391a741f802c84cead08c763e7fdc87f56;hpb=46d34fefc1bd8e0f5329d4c22d59a286e3bbb260;p=openvswitch

diff --git a/lib/netlink.h b/lib/netlink.h
index 188a9639..7eced42f 100644
--- a/lib/netlink.h
+++ b/lib/netlink.h
@@ -90,6 +90,18 @@ void nl_msg_push_string(struct ofpbuf *, uint16_t type, const char *value);
 
 /* Separating buffers into individual messages. */
 struct nlmsghdr *nl_msg_next(struct ofpbuf *buffer, struct ofpbuf *msg);
+
+/* Sizes of various attribute types, in bytes, including the attribute header
+ * and padding. */
+#define NL_ATTR_SIZE(PAYLOAD_SIZE) (NLA_HDRLEN + NLA_ALIGN(PAYLOAD_SIZE))
+#define NL_A_U8_SIZE   NL_ATTR_SIZE(sizeof(uint8_t))
+#define NL_A_U16_SIZE  NL_ATTR_SIZE(sizeof(uint16_t))
+#define NL_A_U32_SIZE  NL_ATTR_SIZE(sizeof(uint32_t))
+#define NL_A_U64_SIZE  NL_ATTR_SIZE(sizeof(uint64_t))
+#define NL_A_BE16_SIZE NL_ATTR_SIZE(sizeof(ovs_be16))
+#define NL_A_BE32_SIZE NL_ATTR_SIZE(sizeof(ovs_be32))
+#define NL_A_BE64_SIZE NL_ATTR_SIZE(sizeof(ovs_be64))
+#define NL_A_FLAG_SIZE NL_ATTR_SIZE(0)
 
 /* Netlink attribute types. */
 enum nl_attr_type
@@ -172,6 +184,11 @@ struct nl_policy
     bool optional;
 };
 
+#define NL_POLICY_FOR(TYPE) \
+    .type = NL_A_UNSPEC, .min_len = sizeof(TYPE), .max_len = sizeof(TYPE)
+
+bool nl_attr_validate(const struct nlattr *, const struct nl_policy *);
+
 bool nl_policy_parse(const struct ofpbuf *, size_t offset,
                      const struct nl_policy[],
                      struct nlattr *[], size_t n_attrs);