[HICN-151] The source address in the IP face is optional. If not provided it will be used one of the ip addresses available in the interface

Change-Id: If800a07c0a61cde9152efdee01dd6ae9b12615dc
Signed-off-by: Alberto Compagno <acompagn+fdio@cisco.com>

4 files changed, 119 insertions, 15 deletions

diff --git a/hicn-plugin/src/faces/ip/face_ip_cli.c b/hicn-plugin/src/faces/ip/face_ip_cli.c
index 534ae7f63..ba7765541 100644
--- a/hicn-plugin/src/faces/ip/face_ip_cli.c
+++ b/hicn-plugin/src/faces/ip/face_ip_cli.c
@@ -60,10 +60,12 @@ hicn_face_ip_cli_set_command_fn (vlib_main_t * vm,
       else if (unformat (line_input, "add"))
 	{
 	  face_op = HICN_FACE_ADD;
-	  if (unformat (line_input, "local %U remote %U intfc %U",
-			unformat_ip46_address, &local_addr, IP46_TYPE_ANY,
-			unformat_ip46_address, &remote_addr, IP46_TYPE_ANY,
-			unformat_vnet_sw_interface, vnm, &sw_if));
+	  if (unformat (line_input, "local %U ",
+			unformat_ip46_address, &local_addr, IP46_TYPE_ANY));
+	  else if (unformat (line_input, "remote %U intfc %U",
+			     unformat_ip46_address, &remote_addr,
+			     IP46_TYPE_ANY, unformat_vnet_sw_interface, vnm,
+			     &sw_if));
 	  else
 	    {
 	      return clib_error_return (0, "%s '%U'",
@@ -90,6 +92,57 @@ hicn_face_ip_cli_set_command_fn (vlib_main_t * vm,
 	}
     }
 
+  if (ip46_address_is_zero (&local_addr))
+    {
+      if (!vnet_sw_interface_is_valid (vnm, sw_if))
+	return clib_error_return (0, "interface not valid");
+
+      if (ip46_address_is_ip4 (&remote_addr))
+	{
+	  ip_interface_address_t *interface_address;
+	  ip4_address_t *addr =
+	    ip4_interface_address_matching_destination (&ip4_main,
+							&remote_addr.ip4,
+							sw_if,
+							&interface_address);
+
+	  if (addr == NULL)
+	    addr = ip4_interface_first_address (&ip4_main,
+						sw_if, &interface_address);
+
+	  if (addr == NULL)
+	    return clib_error_return (0,
+				      "no valid ip address on interface %d",
+				      sw_if);
+
+	  ip46_address_set_ip4 (&local_addr, addr);
+	}
+      else
+	{
+	  ip_interface_address_t *interface_address;
+	  ip6_interface_address_matching_destination (&ip6_main,
+						      &remote_addr.ip6, sw_if,
+						      &interface_address);
+
+	  ip6_address_t *addr = NULL;
+	  if (interface_address != NULL)
+	    addr =
+	      (ip6_address_t *)
+	      ip_interface_address_get_address (&ip6_main.lookup_main,
+						interface_address);
+
+	  if (addr == NULL)
+	    addr = ip6_interface_first_address (&ip6_main, sw_if);
+
+	  if (addr == NULL)
+	    return clib_error_return (0,
+				      "no valid ip address on interface %d",
+				      sw_if);
+
+	  ip46_address_set_ip6 (&local_addr, addr);
+	}
+    }
+
   int rv;
   switch (face_op)
     {
diff --git a/hicn-plugin/src/hicn_api.c b/hicn-plugin/src/hicn_api.c
index 8f47ea799..b4d518774 100644
--- a/hicn-plugin/src/hicn_api.c
+++ b/hicn-plugin/src/hicn_api.c
@@ -208,15 +208,68 @@ vl_api_hicn_api_face_ip_add_t_handler (vl_api_hicn_api_face_ip_add_t * mp)
   remote_addr.as_u64[1] =
     clib_net_to_host_u64 (((u64 *) (&mp->remote_addr))[1]);
 
-  u32 swif = clib_net_to_host_u32 (mp->swif);
+  u32 sw_if = clib_net_to_host_u32 (mp->swif);
+
+  if (ip46_address_is_zero (&local_addr))
+    {
+      if (vnet_sw_interface_is_valid (vnm, sw_if))
+	{
+	  rv = HICN_ERROR_NONE;
+	}
+
+      if (rv == HICN_ERROR_NONE && ip46_address_is_ip4 (&remote_addr))
+	{
+	  ip_interface_address_t *interface_address;
+	  ip4_address_t *addr =
+	    ip4_interface_address_matching_destination (&ip4_main,
+							&remote_addr.ip4,
+							sw_if,
+							&interface_address);
+	  if (addr == NULL)
+	    addr = ip4_interface_first_address (&ip4_main,
+						sw_if, &interface_address);
+
+	  if (addr == NULL)
+	    rv = HICN_ERROR_UNSPECIFIED;
+	  else
+	    ip46_address_set_ip4 (&local_addr, addr);
+	}
+      else
+	{
+	  ip_interface_address_t *interface_address;
+	  ip6_interface_address_matching_destination (&ip6_main,
+						      &remote_addr.ip6, sw_if,
+						      &interface_address);
+	  ip6_address_t *addr = NULL;
+	  if (rv == HICN_ERROR_NONE && interface_address != NULL)
+	    {
+	      addr =
+		(ip6_address_t *)
+		ip_interface_address_get_address (&ip6_main.lookup_main,
+						  interface_address);
+	    }
+	  else
+	    {
+	      addr = ip6_interface_first_address (&ip6_main, sw_if);
+	    }
 
-  if (vnet_get_sw_interface_safe (vnm, swif) != NULL)
-    rv = hicn_face_ip_add (&local_addr, &remote_addr, swif, &faceid);
+	  if (addr == NULL)
+	    rv = HICN_ERROR_UNSPECIFIED;
+	  else
+	    ip46_address_set_ip6 (&local_addr, addr);
+	}
+    }
+
+  if (rv == HICN_ERROR_NONE)
+    rv = hicn_face_ip_add (&local_addr, &remote_addr, sw_if, &faceid);
+  else
+    faceid = HICN_FACE_NULL;
 
   /* *INDENT-OFF* */
   REPLY_MACRO2 (VL_API_HICN_API_FACE_IP_ADD_REPLY /* , rmp, mp, rv */ ,(
     {
-      rmp->faceid = clib_host_to_net_u16 ((u16) faceid);
+      rmp->faceid = clib_host_to_net_u16 ((u32) faceid);
+      rmp->retval = rv;
     }));
   /* *INDENT-ON* */
 }
diff --git a/hicn-plugin/src/hicn_api_test.c b/hicn-plugin/src/hicn_api_test.c
index 909bc540f..4225f0078 100644
--- a/hicn-plugin/src/hicn_api_test.c
+++ b/hicn-plugin/src/hicn_api_test.c
@@ -362,11 +362,9 @@ api_hicn_api_face_ip_add (vat_main_t * vam)
     }
 
   /* Check for presence of both addresses */
-  if ((!ip46_address_is_zero (&local_addr)
-       && ! !ip46_address_is_zero (&remote_addr)))
+  if (ip46_address_is_zero (&remote_addr))
     {
-      clib_warning
-	("Incomplete IP face. Please specify local and remote address");
+      clib_warning ("Incomplete IP face. Please specify remote address");
       return (1);
     }
   /* Construct the API message */
@@ -558,7 +556,7 @@ api_hicn_api_face_stats_dump (vat_main_t * vam)
 
 /* memif-details message handler */
 static void
-vl_api_hicn_api_face_stats_details_t_handler
+  vl_api_hicn_api_face_stats_details_t_handler
   (vl_api_hicn_api_face_stats_details_t * mp)
 {
   vat_main_t *vam = hicn_test_main.vat_main;
@@ -1071,7 +1069,7 @@ _(hicn_api_node_params_set, "PIT size <sz> CS size <sz>"                \
 _(hicn_api_node_params_get, "")                                         \
 _(hicn_api_node_stats_get, "")                                          \
 _(hicn_api_face_ip_del, "face <faceID>")                                \
-_(hicn_api_face_ip_add, "add <swif> <address>")                         \
+_(hicn_api_face_ip_add, "local <address> remote <address> intfc <swif>")\
 _(hicn_api_face_stats_dump, "")                                         \
 _(hicn_api_route_nhops_add, "add prefix <IP4/IP6>/<subnet> face <faceID> weight <weight>") \
 _(hicn_api_face_ip_params_get, "face <faceID>")                         \
diff --git a/hicn-plugin/src/route.c b/hicn-plugin/src/route.c
index 9202efbd4..11302aba4 100644
--- a/hicn-plugin/src/route.c
+++ b/hicn-plugin/src/route.c
@@ -108,7 +108,7 @@ hicn_route_add (hicn_face_id_t * face_id, u32 len,
   vlib_main_t *vm = vlib_get_main ();
   hicn_face_vft_t *face_vft = NULL;
 
-  if (face_id == NULL)
+  if (face_id == NULL || !hicn_dpoi_idx_is_valid (*face_id))
     {
       return HICN_ERROR_ROUTE_INVAL;
     }