+
+/* Returns the new checksum for a packet in which the checksum field previously
+ * contained 'old_csum' and in which a field that contained the 6 bytes at
+ * 'old_mac' was changed to contain the 6 bytes at 'new_mac'. */
+ovs_be16
+recalc_csum48(ovs_be16 old_csum, const struct eth_addr old_mac,
+ const struct eth_addr new_mac)
+{
+ ovs_be16 new_csum = old_csum;
+
+ for (int i = 0; i < 3; ++i) {
+ new_csum = recalc_csum16(new_csum, old_mac.be16[i], new_mac.be16[i]);
+ }
+
+ return new_csum;
+}
+
+/* Returns the new checksum for a packet in which the checksum field previously
+ * contained 'old_csum' and in which a field that contained 'old_u32[4]' was
+ * changed to contain 'new_u32[4]'. */
+ovs_be16
+recalc_csum128(ovs_be16 old_csum, ovs_16aligned_be32 old_u32[4],
+ const ovs_be32 new_u32[4])
+{
+ ovs_be16 new_csum = old_csum;
+ int i;
+
+ for (i = 0; i < 4; ++i) {
+ new_csum = recalc_csum32(new_csum,
+ get_16aligned_be32(&old_u32[i]), new_u32[i]);
+ }
+ return new_csum;
+}
+#else /* __CHECKER__ */
+/* Making sparse happy with these functions also makes them unreadable, so
+ * don't bother to show it their implementations. */
+#endif