1 files changed, 124 insertions, 0 deletions
diff --git a/src/vnet/ip/ip.c b/src/vnet/ip/ip.c
new file mode 100644
index 00000000000..caa553dd6d7
--- /dev/null
+++ b/src/vnet/ip/ip.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/ip/ip.h>
+#include <vnet/fib/fib_table.h>
+
+u8
+ip_is_zero (ip46_address_t * ip46_address, u8 is_ip4)
+{
+  if (is_ip4)
+    return (ip46_address->ip4.as_u32 == 0);
+  else
+    return (ip46_address->as_u64[0] == 0 && ip46_address->as_u64[1] == 0);
+}
+
+u8
+ip_is_local_host (ip46_address_t * ip46_address, u8 is_ip4)
+{
+  if (is_ip4)
+    return (ip46_address->ip4.as_u8[0] == 127);
+  else
+    return (ip46_address->as_u64[0] == 0 && ip46_address->as_u64[1] == 1);
+}
+
+/**
+ * Checks that an ip is local to the requested fib
+ */
+u8
+ip_is_local (u32 fib_index, ip46_address_t * ip46_address, u8 is_ip4)
+{
+  fib_node_index_t fei;
+  fib_entry_flag_t flags;
+  fib_prefix_t prefix;
+
+  /* Check if requester is local */
+  if (is_ip4)
+    {
+      prefix.fp_len = 32;
+      prefix.fp_proto = FIB_PROTOCOL_IP4;
+    }
+  else
+    {
+      prefix.fp_len = 128;
+      prefix.fp_proto = FIB_PROTOCOL_IP6;
+    }
+
+  clib_memcpy (&prefix.fp_addr, ip46_address, sizeof (ip46_address_t));
+  fei = fib_table_lookup (0, &prefix);
+  flags = fib_entry_get_flags (fei);
+
+  return (flags & FIB_ENTRY_FLAG_LOCAL);
+}
+
+u8
+ip_interface_has_address (u32 sw_if_index, ip46_address_t * ip, u8 is_ip4)
+{
+  ip_interface_address_t *ia = 0;
+
+  if (is_ip4)
+    {
+      ip_lookup_main_t *lm4 = &ip4_main.lookup_main;
+      ip4_address_t *ip4;
+      /* *INDENT-OFF* */
+      foreach_ip_interface_address (lm4, ia, sw_if_index, 1 /* unnumbered */ ,
+      ({
+        ip4 = ip_interface_address_get_address (lm4, ia);
+        if (ip4_address_compare (ip4, &ip->ip4) == 0)
+          return 1;
+      }));
+      /* *INDENT-ON* */
+    }
+  else
+    {
+      ip_lookup_main_t *lm6 = &ip6_main.lookup_main;
+      ip6_address_t *ip6;
+      /* *INDENT-OFF* */
+      foreach_ip_interface_address (lm6, ia, sw_if_index, 1 /* unnumbered */ ,
+      ({
+        ip6 = ip_interface_address_get_address (lm6, ia);
+        if (ip6_address_compare (ip6, &ip->ip6) == 0)
+          return 1;
+      }));
+      /* *INDENT-ON* */
+    }
+  return 0;
+}
+
+void
+ip_copy (ip46_address_t * dst, ip46_address_t * src, u8 is_ip4)
+{
+  if (is_ip4)
+    dst->ip4.as_u32 = src->ip4.as_u32;
+  else
+    clib_memcpy (&dst->ip6, &src->ip6, sizeof (ip6_address_t));
+}
+
+void
+ip_set (ip46_address_t * dst, void *src, u8 is_ip4)
+{
+  if (is_ip4)
+    dst->ip4.as_u32 = ((ip4_address_t *) src)->as_u32;
+  else
+    clib_memcpy (&dst->ip6, (ip6_address_t *) src, sizeof (ip6_address_t));
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */