LLDP: Add Management Address TLV
- Management Address TLV is added as per IEEE Std 802.1AB-2009.
- Support of management ipv4/ipv6 addresses and OID.
Change-Id: I57c14741774390809ce5a829cc087947424432c7
Signed-off-by: Steve Shin <jonshin@cisco.com>
diff --git a/src/vnet/lldp/lldp_output.c b/src/vnet/lldp/lldp_output.c
index 8698ec9..3714e8f 100644
--- a/src/vnet/lldp/lldp_output.c
+++ b/src/vnet/lldp/lldp_output.c
@@ -19,6 +19,30 @@
#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)
{
lldp_chassis_id_tlv_t *t = (lldp_chassis_id_tlv_t *) * t0p;
@@ -103,6 +127,50 @@
}
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)
{
lldp_tlv_t *t = (lldp_tlv_t *) * t0p;
@@ -120,6 +188,7 @@
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);
}
@@ -186,6 +255,9 @@
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);
}
}