Reorganize source tree to use single autotools instance

Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 302 insertions, 0 deletions

diff --git a/src/vnet/lldp/lldp_input.c b/src/vnet/lldp/lldp_input.c
new file mode 100644
index 00000000000..762743d0d8d
--- /dev/null
+++ b/src/vnet/lldp/lldp_input.c
@@ -0,0 +1,302 @@
+/*
+ * Copyright (c) 2011-2016 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.
+ */
+/**
+ * @file
+ * @brief LLDP packet parsing implementation
+ */
+#include <vnet/lldp/lldp_node.h>
+#include <vnet/lldp/lldp_protocol.h>
+#include <vlibmemory/api.h>
+
+typedef struct
+{
+  u32 hw_if_index;
+  u8 chassis_id_len;
+  u8 chassis_id_subtype;
+  u8 portid_len;
+  u8 portid_subtype;
+  u16 ttl;
+  u8 data[0];			/* this contains both chassis id (chassis_id_len bytes) and port
+				   id (portid_len bytes) */
+} lldp_intf_update_t;
+
+static void
+lldp_rpc_update_peer_cb (const lldp_intf_update_t * a)
+{
+  ASSERT (os_get_cpu_number () == 0);
+
+  lldp_intf_t *n = lldp_get_intf (&lldp_main, a->hw_if_index);
+  if (!n)
+    {
+      /* LLDP turned off for this interface, ignore the update */
+      return;
+    }
+  const u8 *chassis_id = a->data;
+  const u8 *portid = a->data + a->chassis_id_len;
+
+  if (n->chassis_id)
+    {
+      _vec_len (n->chassis_id) = 0;
+    }
+  vec_add (n->chassis_id, chassis_id, a->chassis_id_len);
+  n->chassis_id_subtype = a->chassis_id_subtype;
+  if (n->port_id)
+    {
+      _vec_len (n->port_id) = 0;
+    }
+  vec_add (n->port_id, portid, a->portid_len);
+  n->port_id_subtype = a->portid_subtype;
+  n->ttl = a->ttl;
+  n->last_heard = vlib_time_now (lldp_main.vlib_main);
+}
+
+static void
+lldp_rpc_update_peer (u32 hw_if_index, const u8 * chid, u8 chid_len,
+		      u8 chid_subtype, const u8 * portid,
+		      u8 portid_len, u8 portid_subtype, u16 ttl)
+{
+  const size_t data_size =
+    sizeof (lldp_intf_update_t) + chid_len + portid_len;
+  u8 data[data_size];
+  lldp_intf_update_t *u = (lldp_intf_update_t *) data;
+  u->hw_if_index = hw_if_index;
+  u->chassis_id_len = chid_len;
+  u->chassis_id_subtype = chid_subtype;
+  u->ttl = ttl;
+  u->portid_len = portid_len;
+  u->portid_subtype = portid_subtype;
+  clib_memcpy (u->data, chid, chid_len);
+  clib_memcpy (u->data + chid_len, portid, portid_len);
+  vl_api_rpc_call_main_thread (lldp_rpc_update_peer_cb, data, data_size);
+}
+
+lldp_tlv_code_t
+lldp_tlv_get_code (const lldp_tlv_t * tlv)
+{
+  return tlv->head.byte1 >> 1;
+}
+
+void
+lldp_tlv_set_code (lldp_tlv_t * tlv, lldp_tlv_code_t code)
+{
+  tlv->head.byte1 = (tlv->head.byte1 & 1) + (code << 1);
+}
+
+u16
+lldp_tlv_get_length (const lldp_tlv_t * tlv)
+{
+  return (((u16) (tlv->head.byte1 & 1)) << 8) + tlv->head.byte2;
+}
+
+void
+lldp_tlv_set_length (lldp_tlv_t * tlv, u16 length)
+{
+  tlv->head.byte2 = length & ((1 << 8) - 1);
+  if (length > (1 << 8) - 1)
+    {
+      tlv->head.byte1 |= 1;
+    }
+  else
+    {
+      tlv->head.byte1 &= (1 << 8) - 2;
+    }
+}
+
+lldp_main_t lldp_main;
+
+static int
+lldp_packet_scan (u32 hw_if_index, const lldp_tlv_t * pkt)
+{
+  const lldp_tlv_t *tlv = pkt;
+
+#define TLV_VIOLATES_PKT_BOUNDARY(pkt, tlv)                               \
+  (((((u8 *)tlv) + sizeof (lldp_tlv_t)) > ((u8 *)pkt + vec_len (pkt))) || \
+   ((((u8 *)tlv) + lldp_tlv_get_length (tlv)) > ((u8 *)pkt + vec_len (pkt))))
+
+  /* first tlv is always chassis id, followed by port id and ttl tlvs */
+  if (TLV_VIOLATES_PKT_BOUNDARY (pkt, tlv) ||
+      LLDP_TLV_NAME (chassis_id) != lldp_tlv_get_code (tlv))
+    {
+      return LLDP_ERROR_BAD_TLV;
+    }
+
+  u16 l = lldp_tlv_get_length (tlv);
+  if (l < STRUCT_SIZE_OF (lldp_chassis_id_tlv_t, subtype) +
+      LLDP_MIN_CHASS_ID_LEN ||
+      l > STRUCT_SIZE_OF (lldp_chassis_id_tlv_t, subtype) +
+      LLDP_MAX_CHASS_ID_LEN)
+    {
+      return LLDP_ERROR_BAD_TLV;
+    }
+
+  u8 chid_subtype = ((lldp_chassis_id_tlv_t *) tlv)->subtype;
+  u8 *chid = ((lldp_chassis_id_tlv_t *) tlv)->id;
+  u8 chid_len = l - STRUCT_SIZE_OF (lldp_chassis_id_tlv_t, subtype);
+
+  tlv = (lldp_tlv_t *) ((u8 *) tlv + STRUCT_SIZE_OF (lldp_tlv_t, head) + l);
+
+  if (TLV_VIOLATES_PKT_BOUNDARY (pkt, tlv) ||
+      LLDP_TLV_NAME (port_id) != lldp_tlv_get_code (tlv))
+    {
+      return LLDP_ERROR_BAD_TLV;
+    }
+  l = lldp_tlv_get_length (tlv);
+  if (l < STRUCT_SIZE_OF (lldp_port_id_tlv_t, subtype) +
+      LLDP_MIN_PORT_ID_LEN ||
+      l > STRUCT_SIZE_OF (lldp_chassis_id_tlv_t, subtype) +
+      LLDP_MAX_PORT_ID_LEN)
+    {
+      return LLDP_ERROR_BAD_TLV;
+    }
+
+  u8 portid_subtype = ((lldp_port_id_tlv_t *) tlv)->subtype;
+  u8 *portid = ((lldp_port_id_tlv_t *) tlv)->id;
+  u8 portid_len = l - STRUCT_SIZE_OF (lldp_port_id_tlv_t, subtype);
+
+  tlv = (lldp_tlv_t *) ((u8 *) tlv + STRUCT_SIZE_OF (lldp_tlv_t, head) + l);
+
+  if (TLV_VIOLATES_PKT_BOUNDARY (pkt, tlv) ||
+      LLDP_TLV_NAME (ttl) != lldp_tlv_get_code (tlv))
+    {
+      return LLDP_ERROR_BAD_TLV;
+    }
+  l = lldp_tlv_get_length (tlv);
+  if (l != STRUCT_SIZE_OF (lldp_ttl_tlv_t, ttl))
+    {
+      return LLDP_ERROR_BAD_TLV;
+    }
+  u16 ttl = ntohs (((lldp_ttl_tlv_t *) tlv)->ttl);
+  tlv = (lldp_tlv_t *) ((u8 *) tlv + STRUCT_SIZE_OF (lldp_tlv_t, head) + l);
+  while (!TLV_VIOLATES_PKT_BOUNDARY (pkt, tlv) &&
+	 LLDP_TLV_NAME (pdu_end) != lldp_tlv_get_code (tlv))
+    {
+      switch (lldp_tlv_get_code (tlv))
+	{
+#define F(num, type, str)     \
+  case LLDP_TLV_NAME (type):  \
+    /* ignore optional TLV */ \
+    break;
+	  foreach_lldp_optional_tlv_type (F);
+#undef F
+	default:
+	  return LLDP_ERROR_BAD_TLV;
+	}
+      tlv = (lldp_tlv_t *) ((u8 *) tlv + STRUCT_SIZE_OF (lldp_tlv_t, head) +
+			    lldp_tlv_get_length (tlv));
+    }
+  /* last tlv is pdu_end */
+  if (TLV_VIOLATES_PKT_BOUNDARY (pkt, tlv) ||
+      LLDP_TLV_NAME (pdu_end) != lldp_tlv_get_code (tlv) ||
+      0 != lldp_tlv_get_length (tlv))
+    {
+      return LLDP_ERROR_BAD_TLV;
+    }
+  lldp_rpc_update_peer (hw_if_index, chid, chid_len, chid_subtype, portid,
+			portid_len, portid_subtype, ttl);
+  return LLDP_ERROR_NONE;
+}
+
+lldp_intf_t *
+lldp_get_intf (lldp_main_t * lm, u32 hw_if_index)
+{
+  uword *p = hash_get (lm->intf_by_hw_if_index, hw_if_index);
+
+  if (p)
+    {
+      return pool_elt_at_index (lm->intfs, p[0]);
+    }
+  return NULL;
+}
+
+lldp_intf_t *
+lldp_create_intf (lldp_main_t * lm, u32 hw_if_index)
+{
+
+  uword *p;
+  lldp_intf_t *n;
+  p = hash_get (lm->intf_by_hw_if_index, hw_if_index);
+
+  if (p == 0)
+    {
+      pool_get (lm->intfs, n);
+      memset (n, 0, sizeof (*n));
+      n->hw_if_index = hw_if_index;
+      hash_set (lm->intf_by_hw_if_index, n->hw_if_index, n - lm->intfs);
+    }
+  else
+    {
+      n = pool_elt_at_index (lm->intfs, p[0]);
+    }
+  return n;
+}
+
+/*
+ * lldp input routine
+ */
+lldp_error_t
+lldp_input (vlib_main_t * vm, vlib_buffer_t * b0, u32 bi0)
+{
+  lldp_main_t *lm = &lldp_main;
+  lldp_error_t e;
+
+  /* find our interface */
+  vnet_sw_interface_t *sw_interface = vnet_get_sw_interface (lm->vnet_main,
+							     vnet_buffer
+							     (b0)->sw_if_index
+							     [VLIB_RX]);
+  lldp_intf_t *n = lldp_get_intf (lm, sw_interface->hw_if_index);
+
+  if (!n)
+    {
+      /* lldp disabled on this interface, we're done */
+      return LLDP_ERROR_DISABLED;
+    }
+
+  /* Actually scan the packet */
+  e = lldp_packet_scan (sw_interface->hw_if_index,
+			vlib_buffer_get_current (b0));
+
+  return e;
+}
+
+/*
+ * setup function
+ */
+static clib_error_t *
+lldp_init (vlib_main_t * vm)
+{
+  clib_error_t *error;
+  lldp_main_t *lm = &lldp_main;
+
+  if ((error = vlib_call_init_function (vm, lldp_template_init)))
+    return error;
+
+  lm->vlib_main = vm;
+  lm->vnet_main = vnet_get_main ();
+  lm->msg_tx_hold = 4;		/* default value per IEEE 802.1AB-2009 */
+  lm->msg_tx_interval = 30;	/* default value per IEEE 802.1AB-2009 */
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (lldp_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */