- clib_memcpy ((void *) ip0 + sr_len, ip0,
- (void *) sr0 - (void *) ip0);
+ copy_src0 = (u64 *) ip0;
+ copy_dst0 = copy_src0 + (sr0->length + 1);
+ /* number of 8 octet units to copy
+ * By default in absence of extension headers it is equal to length of ip6 header
+ * With extension headers it number of 8 octet units of ext headers preceding
+ * SR header
+ */
+ copy_len_u64s0 =
+ (((u8 *) sr0 - (u8 *) ip0) - sizeof (ip6_header_t)) >> 3;
+ copy_dst0[4 + copy_len_u64s0] = copy_src0[4 + copy_len_u64s0];
+ copy_dst0[3 + copy_len_u64s0] = copy_src0[3 + copy_len_u64s0];
+ copy_dst0[2 + copy_len_u64s0] = copy_src0[2 + copy_len_u64s0];
+ copy_dst0[1 + copy_len_u64s0] = copy_src0[1 + copy_len_u64s0];
+ copy_dst0[0 + copy_len_u64s0] = copy_src0[0 + copy_len_u64s0];
+
+ for (i = copy_len_u64s0 - 1; i >= 0; i--)
+ {
+ copy_dst0[i] = copy_src0[i];
+ }