datapath: Add compat support for nla_type().

[openvswitch] / lib / netlink.c

diff --git a/lib/netlink.c b/lib/netlink.c
index 39d703aed6bbb399287383eae04d3510ab5eca1b..f1234ad4840dad8db21f3899a65415314f9bd50c 100644 (file)
--- a/lib/netlink.c
+++ b/lib/netlink.c
@@ -243,30 +243,54 @@ nl_msg_put_u8(struct ofpbuf *msg, uint16_t type, uint8_t value)
     nl_msg_put_unspec(msg, type, &value, sizeof value);
 }
 
-/* Appends a Netlink attribute of the given 'type' and the given 16-bit 'value'
- * to 'msg'. */
+/* Appends a Netlink attribute of the given 'type' and the given 16-bit host
+ * byte order 'value' to 'msg'. */
 void
 nl_msg_put_u16(struct ofpbuf *msg, uint16_t type, uint16_t value)
 {
     nl_msg_put_unspec(msg, type, &value, sizeof value);
 }
 
-/* Appends a Netlink attribute of the given 'type' and the given 32-bit 'value'
- * to 'msg'. */
+/* Appends a Netlink attribute of the given 'type' and the given 32-bit host
+ * byte order 'value' to 'msg'. */
 void
 nl_msg_put_u32(struct ofpbuf *msg, uint16_t type, uint32_t value)
 {
     nl_msg_put_unspec(msg, type, &value, sizeof value);
 }
 
-/* Appends a Netlink attribute of the given 'type' and the given 64-bit 'value'
- * to 'msg'. */
+/* Appends a Netlink attribute of the given 'type' and the given 64-bit host
+ * byte order 'value' to 'msg'. */
 void
 nl_msg_put_u64(struct ofpbuf *msg, uint16_t type, uint64_t value)
 {
     nl_msg_put_unspec(msg, type, &value, sizeof value);
 }
 
+/* Appends a Netlink attribute of the given 'type' and the given 16-bit network
+ * byte order 'value' to 'msg'. */
+void
+nl_msg_put_be16(struct ofpbuf *msg, uint16_t type, ovs_be16 value)
+{
+    nl_msg_put_unspec(msg, type, &value, sizeof value);
+}
+
+/* Appends a Netlink attribute of the given 'type' and the given 32-bit network
+ * byte order 'value' to 'msg'. */
+void
+nl_msg_put_be32(struct ofpbuf *msg, uint16_t type, ovs_be32 value)
+{
+    nl_msg_put_unspec(msg, type, &value, sizeof value);
+}
+
+/* Appends a Netlink attribute of the given 'type' and the given 64-bit network
+ * byte order 'value' to 'msg'. */
+void
+nl_msg_put_be64(struct ofpbuf *msg, uint16_t type, ovs_be64 value)
+{
+    nl_msg_put_unspec(msg, type, &value, sizeof value);
+}
+
 /* Appends a Netlink attribute of the given 'type' and the given
  * null-terminated string 'value' to 'msg'. */
 void
@@ -334,6 +358,14 @@ nl_msg_next(struct ofpbuf *buffer, struct ofpbuf *msg)
 \f
 /* Attributes. */
 
+/* Returns the bits of 'nla->nla_type' that are significant for determining its
+ * type. */
+int
+nl_attr_type(const struct nlattr *nla)
+{
+    return nla->nla_type & NLA_TYPE_MASK;
+}
+
 /* Returns the first byte in the payload of attribute 'nla'. */
 const void *
 nl_attr_get(const struct nlattr *nla)
@@ -379,7 +411,7 @@ nl_attr_get_u8(const struct nlattr *nla)
     return NL_ATTR_GET_AS(nla, uint8_t);
 }
 
-/* Returns the 16-bit value in 'nla''s payload.
+/* Returns the 16-bit host byte order value in 'nla''s payload.
  *
  * Asserts that 'nla''s payload is at least 2 bytes long. */
 uint16_t
@@ -388,7 +420,7 @@ nl_attr_get_u16(const struct nlattr *nla)
     return NL_ATTR_GET_AS(nla, uint16_t);
 }
 
-/* Returns the 32-bit value in 'nla''s payload.
+/* Returns the 32-bit host byte order value in 'nla''s payload.
  *
  * Asserts that 'nla''s payload is at least 4 bytes long. */
 uint32_t
@@ -397,7 +429,7 @@ nl_attr_get_u32(const struct nlattr *nla)
     return NL_ATTR_GET_AS(nla, uint32_t);
 }
 
-/* Returns the 64-bit value in 'nla''s payload.
+/* Returns the 64-bit host byte order value in 'nla''s payload.
  *
  * Asserts that 'nla''s payload is at least 8 bytes long. */
 uint64_t
@@ -406,6 +438,33 @@ nl_attr_get_u64(const struct nlattr *nla)
     return NL_ATTR_GET_AS(nla, uint64_t);
 }
 
+/* Returns the 16-bit network byte order value in 'nla''s payload.
+ *
+ * Asserts that 'nla''s payload is at least 2 bytes long. */
+ovs_be16
+nl_attr_get_be16(const struct nlattr *nla)
+{
+    return NL_ATTR_GET_AS(nla, ovs_be16);
+}
+
+/* Returns the 32-bit network byte order value in 'nla''s payload.
+ *
+ * Asserts that 'nla''s payload is at least 4 bytes long. */
+ovs_be32
+nl_attr_get_be32(const struct nlattr *nla)
+{
+    return NL_ATTR_GET_AS(nla, ovs_be32);
+}
+
+/* Returns the 64-bit network byte order value in 'nla''s payload.
+ *
+ * Asserts that 'nla''s payload is at least 8 bytes long. */
+ovs_be64
+nl_attr_get_be64(const struct nlattr *nla)
+{
+    return NL_ATTR_GET_AS(nla, ovs_be64);
+}
+
 /* Returns the null-terminated string value in 'nla''s payload.
  *
  * Asserts that 'nla''s payload contains a null-terminated string. */
@@ -488,12 +547,12 @@ nl_policy_parse(const struct ofpbuf *msg, size_t nla_offset,
         if (aligned_len > (char*)tail - (char*)p) {
             VLOG_DBG_RL(&rl, "%zu: attr %"PRIu16" aligned data len (%zu) "
                         "> bytes left (%tu)",
-                        offset, nla->nla_type, aligned_len,
+                        offset, nl_attr_type(nla), aligned_len,
                         (char*)tail - (char*)p);
             return false;
         }
 
-        type = nla->nla_type;
+        type = nl_attr_type(nla);
         if (type < n_attrs && policy[type].type != NL_A_NO_ATTR) {
             const struct nl_policy *e = &policy[type];
             size_t min_len, max_len;