LLDP: Add Management Address TLV

[vpp.git] / src / vnet / lldp / lldp_output.c

diff --git a/src/vnet/lldp/lldp_output.c b/src/vnet/lldp/lldp_output.c
index 6cb2627..3714e8f 100644 (file)
--- a/src/vnet/lldp/lldp_output.c
+++ b/src/vnet/lldp/lldp_output.c
@@ -18,6 +18,30 @@
  */
 #include <vnet/lldp/lldp_node.h>
 
+static void
+lldp_build_mgmt_addr_tlv (u8 ** t0p, u8 subtype, u8 addr_len, u8 * addr,
+                         u32 if_index, u8 oid_len, u8 * oid)
+{
+  lldp_tlv_t *t = (lldp_tlv_t *) * t0p;
+
+  lldp_tlv_set_code (t, LLDP_TLV_NAME (mgmt_addr));
+  t->v[0] = addr_len + 1;      /* address string length */
+  t->v[1] = subtype;           /* address subtype */
+  clib_memcpy (&(t->v[2]), addr, addr_len);    /* address */
+  t->v[addr_len + 2] = 2;      /* interface numbering subtype: ifIndex */
+  t->v[addr_len + 3] = (if_index >> 24) & 0xFF;        /* interface number */
+  t->v[addr_len + 4] = (if_index >> 16) & 0xFF;
+  t->v[addr_len + 5] = (if_index >> 8) & 0xFF;
+  t->v[addr_len + 6] = (if_index >> 0) & 0xFF;
+  t->v[addr_len + 7] = oid_len;        /* OID string length */
+
+  if (oid_len > 0)
+    clib_memcpy ((u8 *) & (t->v[addr_len + 8]), oid, oid_len);
+
+  lldp_tlv_set_length (t, addr_len + oid_len + 8);
+  *t0p += STRUCT_SIZE_OF (lldp_tlv_t, head) + addr_len + oid_len + 8;
+}
+
 static void
 lldp_add_chassis_id (const vnet_hw_interface_t * hw, u8 ** t0p)
 {
@@ -74,6 +98,20 @@ lldp_add_ttl (const lldp_main_t * lm, u8 ** t0p, int shutdown)
   *t0p += STRUCT_SIZE_OF (lldp_tlv_t, head) + len;
 }
 
+static void
+lldp_add_port_desc (const lldp_main_t * lm, lldp_intf_t * n, u8 ** t0p)
+{
+  const size_t len = vec_len (n->port_desc);
+  if (len)
+    {
+      lldp_tlv_t *t = (lldp_tlv_t *) * t0p;
+      lldp_tlv_set_code (t, LLDP_TLV_NAME (port_desc));
+      lldp_tlv_set_length (t, len);
+      clib_memcpy (t->v, n->port_desc, len);
+      *t0p += STRUCT_SIZE_OF (lldp_tlv_t, head) + len;
+    }
+}
+
 static void
 lldp_add_sys_name (const lldp_main_t * lm, u8 ** t0p)
 {
@@ -88,6 +126,50 @@ lldp_add_sys_name (const lldp_main_t * lm, u8 ** t0p)
     }
 }
 
+static void
+lldp_add_mgmt_addr (const lldp_intf_t * n, const vnet_hw_interface_t * hw,
+                   u8 ** t0p)
+{
+  const size_t len_ip4 = vec_len (n->mgmt_ip4);
+  const size_t len_ip6 = vec_len (n->mgmt_ip6);
+
+  if (!(len_ip4 | len_ip6))
+    {
+      /*
+         If no management address is configured, the interface port's MAC
+         addressis sent in one TLV.
+       */
+
+      lldp_build_mgmt_addr_tlv (t0p, 1,        /* address subtype: Ipv4 */
+                               6,      /* address string lenth */
+                               hw->hw_address, /* address */
+                               hw->hw_if_index,        /* if index */
+                               vec_len (n->mgmt_oid),  /* OID length */
+                               n->mgmt_oid);   /* OID */
+      return;
+    }
+
+  if (len_ip4)
+    {
+      lldp_build_mgmt_addr_tlv (t0p, 1,        /* address subtype: Ipv4 */
+                               len_ip4,        /* address string lenth */
+                               n->mgmt_ip4,    /* address */
+                               hw->hw_if_index,        /* if index */
+                               vec_len (n->mgmt_oid),  /* OID length */
+                               n->mgmt_oid);   /* OID */
+    }
+
+  if (len_ip6)
+    {
+      lldp_build_mgmt_addr_tlv (t0p, 2,        /* address subtype: Ipv6 */
+                               len_ip6,        /* address string lenth */
+                               n->mgmt_ip6,    /* address */
+                               hw->hw_if_index,        /* if index */
+                               vec_len (n->mgmt_oid),  /* OID length */
+                               n->mgmt_oid);   /* OID */
+    }
+}
+
 static void
 lldp_add_pdu_end (u8 ** t0p)
 {
@@ -99,12 +181,14 @@ lldp_add_pdu_end (u8 ** t0p)
 
 static void
 lldp_add_tlvs (lldp_main_t * lm, vnet_hw_interface_t * hw, u8 ** t0p,
-              int shutdown)
+              int shutdown, lldp_intf_t * n)
 {
   lldp_add_chassis_id (hw, t0p);
   lldp_add_port_id (hw, t0p);
   lldp_add_ttl (lm, t0p, shutdown);
+  lldp_add_port_desc (lm, n, t0p);
   lldp_add_sys_name (lm, t0p);
+  lldp_add_mgmt_addr (n, hw, t0p);
   lldp_add_pdu_end (t0p);
 }
 
@@ -130,6 +214,9 @@ lldp_send_ethernet (lldp_main_t * lm, lldp_intf_t * n, int shutdown)
    */
   h0 = vlib_packet_template_get_packet (vm, &lm->packet_template, &bi0);
 
+  if (!h0)
+    return;
+
   /* Add the interface's ethernet source address */
   hw = vnet_get_hw_interface (vnm, n->hw_if_index);
 
@@ -139,7 +226,7 @@ lldp_send_ethernet (lldp_main_t * lm, lldp_intf_t * n, int shutdown)
   t0 = data;
 
   /* add TLVs */
-  lldp_add_tlvs (lm, hw, &t0, shutdown);
+  lldp_add_tlvs (lm, hw, &t0, shutdown, n);
 
   /* Set the outbound packet length */
   b0 = vlib_get_buffer (vm, bi0);
@@ -167,6 +254,10 @@ lldp_delete_intf (lldp_main_t * lm, lldp_intf_t * n)
       hash_unset (lm->intf_by_hw_if_index, n->hw_if_index);
       vec_free (n->chassis_id);
       vec_free (n->port_id);
+      vec_free (n->port_desc);
+      vec_free (n->mgmt_ip4);
+      vec_free (n->mgmt_ip6);
+      vec_free (n->mgmt_oid);
       pool_put (lm->intfs, n);
     }
 }