ip: Protocol Independent IP Neighbors

Type: feature

 - ip-neighbour: generic neighbour handling; APIs, DBs, event handling,
aging
 - arp: ARP protocol implementation
 - ip6-nd; IPv6 neighbor discovery implementation; separate ND,
MLD, RA
 - ip6-link; manage link-local addresses
 - l2-arp-term; events separated from IP neighbours, since they are not
the same.

vnet retains just enough education to perform ND/ARP packet
construction.
arp and ip6-nd to be moved to plugins soon.

Change-Id: I88dedd0006b299344f4c7024a0aa5baa6b9a8bbe
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 85 insertions, 0 deletions

diff --git a/src/vnet/arp/arp.h b/src/vnet/arp/arp.h
new file mode 100644
index 00000000000..7446564b0cf
--- /dev/null
+++ b/src/vnet/arp/arp.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2015 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.
+ */
+
+#ifndef __ARP_H__
+#define __ARP_H__
+
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ethernet/arp_packet.h>
+
+#define foreach_ethernet_arp_error					\
+  _ (replies_sent, "ARP replies sent")					\
+  _ (l2_type_not_ethernet, "L2 type not ethernet")			\
+  _ (l3_type_not_ip4, "L3 type not IP4")				\
+  _ (l3_src_address_not_local, "IP4 source address not local to subnet") \
+  _ (l3_dst_address_not_local, "IP4 destination address not local to subnet") \
+  _ (l3_dst_address_unset, "IP4 destination address is unset")          \
+  _ (l3_src_address_is_local, "IP4 source address matches local interface") \
+  _ (l3_src_address_learned, "ARP request IP4 source address learned")  \
+  _ (replies_received, "ARP replies received")				\
+  _ (opcode_not_request, "ARP opcode not request")                      \
+  _ (proxy_arp_replies_sent, "Proxy ARP replies sent")			\
+  _ (l2_address_mismatch, "ARP hw addr does not match L2 frame src addr") \
+  _ (gratuitous_arp, "ARP probe or announcement dropped") \
+  _ (interface_no_table, "Interface is not mapped to an IP table") \
+  _ (interface_not_ip_enabled, "Interface is not IP enabled") \
+  _ (unnumbered_mismatch, "RX interface is unnumbered to different subnet") \
+
+typedef enum
+{
+#define _(sym,string) ETHERNET_ARP_ERROR_##sym,
+  foreach_ethernet_arp_error
+#undef _
+    ETHERNET_ARP_N_ERROR,
+} ethernet_arp_reply_error_t;
+
+extern int arp_proxy_add (u32 fib_index,
+			  const ip4_address_t * lo_addr,
+			  const ip4_address_t * hi_addr);
+extern int arp_proxy_del (u32 fib_index,
+			  const ip4_address_t * lo_addr,
+			  const ip4_address_t * hi_addr);
+
+extern int arp_proxy_enable (u32 sw_if_index);
+extern int arp_proxy_disable (u32 sw_if_index);
+
+/**
+ * call back function when walking the DB of proxy ARPs
+ * @return 0 to stop the walk !0 to continue
+ */
+typedef walk_rc_t (proxy_arp_walk_t) (const ip4_address_t * lo_addr,
+				      const ip4_address_t * hi_addr,
+				      u32 fib_index, void *dat);
+
+extern void proxy_arp_walk (proxy_arp_walk_t cb, void *data);
+
+/**
+ * call back function when walking the DB of proxy ARP interface
+ * @return 0 to stop the walk !0 to continue
+ */
+typedef walk_rc_t (proxy_arp_intf_walk_t) (u32 sw_if_index, void *data);
+
+extern void proxy_arp_intfc_walk (proxy_arp_intf_walk_t cb, void *data);
+
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */