af_packet: Add support for dump interfaces

Change-Id: I8d8ecc80edb7665125ba625a3ce7b30d2dea88f0
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>

4 files changed, 98 insertions, 1 deletions

diff --git a/src/vnet/devices/af_packet/af_packet.api b/src/vnet/devices/af_packet/af_packet.api
index d7637da670c..1399011e870 100644
--- a/src/vnet/devices/af_packet/af_packet.api
+++ b/src/vnet/devices/af_packet/af_packet.api
@@ -69,6 +69,24 @@ autoreply define af_packet_set_l4_cksum_offload
   u8 set;
 };
 
+/** \brief Dump af_packet interfaces request */
+define af_packet_dump
+{
+  u32 client_index;
+  u32 context;
+};
+
+/** \brief Reply for af_packet dump request
+    @param sw_if_index - software index of af_packet interface
+    @param host_if_name - interface name
+*/
+define af_packet_details
+{
+  u32 context;
+  u32 sw_if_index;
+  u8 host_if_name[64];
+};
+
 /*
  * Local Variables:
  * eval: (c-set-style "gnu")
diff --git a/src/vnet/devices/af_packet/af_packet.c b/src/vnet/devices/af_packet/af_packet.c
index 2e2c8e64dc3..f1a7b6ad21c 100644
--- a/src/vnet/devices/af_packet/af_packet.c
+++ b/src/vnet/devices/af_packet/af_packet.c
@@ -471,6 +471,31 @@ af_packet_set_l4_cksum_offload (vlib_main_t * vm, u32 sw_if_index, u8 set)
   return 0;
 }
 
+int
+af_packet_dump_ifs (af_packet_if_detail_t ** out_af_packet_ifs)
+{
+  af_packet_main_t *apm = &af_packet_main;
+  af_packet_if_t *apif;
+  af_packet_if_detail_t *r_af_packet_ifs = NULL;
+  af_packet_if_detail_t *af_packet_if = NULL;
+
+  vec_foreach (apif, apm->interfaces)
+  {
+    vec_add2 (r_af_packet_ifs, af_packet_if, 1);
+    af_packet_if->sw_if_index = apif->sw_if_index;
+    if (apif->host_if_name)
+      {
+	clib_memcpy (af_packet_if->host_if_name, apif->host_if_name,
+		     MIN (ARRAY_LEN (af_packet_if->host_if_name) - 1,
+			  strlen ((const char *) apif->host_if_name)));
+      }
+  }
+
+  *out_af_packet_ifs = r_af_packet_ifs;
+
+  return 0;
+}
+
 static clib_error_t *
 af_packet_init (vlib_main_t * vm)
 {
diff --git a/src/vnet/devices/af_packet/af_packet.h b/src/vnet/devices/af_packet/af_packet.h
index 1136be6b871..b4621f6f6d4 100644
--- a/src/vnet/devices/af_packet/af_packet.h
+++ b/src/vnet/devices/af_packet/af_packet.h
@@ -23,6 +23,12 @@
 
 typedef struct
 {
+  u32 sw_if_index;
+  u8 host_if_name[64];
+} af_packet_if_detail_t;
+
+typedef struct
+{
   CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
   clib_spinlock_t lockp;
   u8 *host_if_name;
@@ -70,9 +76,12 @@ int af_packet_create_if (vlib_main_t * vm, u8 * host_if_name,
 int af_packet_delete_if (vlib_main_t * vm, u8 * host_if_name);
 int af_packet_set_l4_cksum_offload (vlib_main_t * vm, u32 sw_if_index,
 				    u8 set);
+int af_packet_dump_ifs (af_packet_if_detail_t ** out_af_packet_ifs);
 
 format_function_t format_af_packet_device_name;
 
+#define MIN(x,y) (((x)<(y))?(x):(y))
+
 /*
  * fd.io coding-style-patch-verification: ON
  *
diff --git a/src/vnet/devices/af_packet/af_packet_api.c b/src/vnet/devices/af_packet/af_packet_api.c
index c7dfabc2ebd..3e03b5917fe 100644
--- a/src/vnet/devices/af_packet/af_packet_api.c
+++ b/src/vnet/devices/af_packet/af_packet_api.c
@@ -45,7 +45,8 @@
 #define foreach_vpe_api_msg                                          \
 _(AF_PACKET_CREATE, af_packet_create)                                \
 _(AF_PACKET_DELETE, af_packet_delete)                                \
-_(AF_PACKET_SET_L4_CKSUM_OFFLOAD, af_packet_set_l4_cksum_offload)
+_(AF_PACKET_SET_L4_CKSUM_OFFLOAD, af_packet_set_l4_cksum_offload)    \
+_(AF_PACKET_DUMP, af_packet_dump)
 
 static void
 vl_api_af_packet_create_t_handler (vl_api_af_packet_create_t * mp)
@@ -103,6 +104,50 @@ static void
   REPLY_MACRO (VL_API_AF_PACKET_SET_L4_CKSUM_OFFLOAD_REPLY);
 }
 
+static void
+af_packet_send_details (vpe_api_main_t * am,
+			vl_api_registration_t * reg,
+			af_packet_if_detail_t * af_packet_if, u32 context)
+{
+  vl_api_af_packet_details_t *mp;
+  mp = vl_msg_api_alloc (sizeof (*mp));
+  memset (mp, 0, sizeof (*mp));
+  mp->_vl_msg_id = htons (VL_API_AF_PACKET_DETAILS);
+  mp->sw_if_index = htonl (af_packet_if->sw_if_index);
+  clib_memcpy (mp->host_if_name, af_packet_if->host_if_name,
+	       MIN (ARRAY_LEN (mp->host_if_name) - 1,
+		    strlen ((const char *) af_packet_if->host_if_name)));
+
+  mp->context = context;
+  vl_api_send_msg (reg, (u8 *) mp);
+}
+
+
+static void
+vl_api_af_packet_dump_t_handler (vl_api_af_packet_dump_t * mp)
+{
+  int rv;
+  vpe_api_main_t *am = &vpe_api_main;
+  vl_api_registration_t *reg;
+  af_packet_if_detail_t *out_af_packet_ifs = NULL;
+  af_packet_if_detail_t *af_packet_if = NULL;
+
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;
+
+  rv = af_packet_dump_ifs (&out_af_packet_ifs);
+  if (rv)
+    return;
+
+  vec_foreach (af_packet_if, out_af_packet_ifs)
+  {
+    af_packet_send_details (am, reg, af_packet_if, mp->context);
+  }
+
+  vec_free (out_af_packet_ifs);
+}
+
 /*
  * af_packet_api_hookup
  * Add vpe's API message handlers to the table.