Reorganize source tree to use single autotools instance

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

1 files changed, 512 insertions, 0 deletions

diff --git a/src/vnet/cdp/cdp_periodic.c b/src/vnet/cdp/cdp_periodic.c
new file mode 100644
index 00000000000..de111079aa3
--- /dev/null
+++ b/src/vnet/cdp/cdp_periodic.c
@@ -0,0 +1,512 @@
+/*
+ * 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.
+ */
+#include <vnet/cdp/cdp_node.h>
+#include <vppinfra/hash.h>
+#include <vnet/unix/pcap.h>
+#include <vnet/srp/srp.h>
+#include <vnet/ppp/ppp.h>
+#include <vnet/hdlc/hdlc.h>
+#include <vnet/srp/packet.h>
+
+/*
+ * Generate a set of specific CDP TLVs.
+ *
+ * $$$ eventually these need to fish better data from
+ * other data structures; e.g. the hostname, software version info
+ * etc.
+ */
+
+static void
+add_device_name_tlv (vnet_hw_interface_t * hw, u8 ** t0p)
+{
+  cdp_tlv_t *t = (cdp_tlv_t *) * t0p;
+
+  t->t = htons (CDP_TLV_device_name);
+  t->l = htons (3 + sizeof (*t));
+  clib_memcpy (&t->v, "VPP", 3);
+
+  *t0p += ntohs (t->l);
+}
+
+static void
+add_port_id_tlv (vnet_hw_interface_t * hw, u8 ** t0p)
+{
+  cdp_tlv_t *t = (cdp_tlv_t *) * t0p;
+
+  t->t = htons (CDP_TLV_port_id);
+  t->l = htons (vec_len (hw->name) + sizeof (*t));
+  clib_memcpy (&t->v, hw->name, vec_len (hw->name));
+  *t0p += ntohs (t->l);
+}
+
+static void
+add_version_tlv (vnet_hw_interface_t * hw, u8 ** t0p)
+{
+  cdp_tlv_t *t = (cdp_tlv_t *) * t0p;
+
+  t->t = htons (CDP_TLV_version);
+  t->l = htons (12 + sizeof (*t));
+  clib_memcpy (&t->v, "VPP Software", 12);
+  *t0p += ntohs (t->l);
+}
+
+static void
+add_platform_tlv (vnet_hw_interface_t * hw, u8 ** t0p)
+{
+  cdp_tlv_t *t = (cdp_tlv_t *) * t0p;
+
+  t->t = htons (CDP_TLV_platform);
+  t->l = htons (2 + sizeof (*t));
+  clib_memcpy (&t->v, "SW", 2);
+  *t0p += ntohs (t->l);
+}
+
+static void
+add_capability_tlv (vnet_hw_interface_t * hw, u8 ** t0p)
+{
+  cdp_tlv_t *t = (cdp_tlv_t *) * t0p;
+  u32 capabilities;
+
+  t->t = htons (CDP_TLV_capabilities);
+  t->l = htons (4 + sizeof (*t));
+  capabilities = CDP_ROUTER_DEVICE;
+  capabilities = htonl (capabilities);
+  clib_memcpy (&t->v, &capabilities, sizeof (capabilities));
+  *t0p += ntohs (t->l);
+}
+
+static void
+add_tlvs (cdp_main_t * cm, vnet_hw_interface_t * hw, u8 ** t0p)
+{
+  add_device_name_tlv (hw, t0p);
+  add_port_id_tlv (hw, t0p);
+  add_version_tlv (hw, t0p);
+  add_platform_tlv (hw, t0p);
+  add_capability_tlv (hw, t0p);
+}
+
+/*
+ * send a cdp pkt on an ethernet interface
+ */
+static void
+send_ethernet_hello (cdp_main_t * cm, cdp_neighbor_t * n, int count)
+{
+  u32 *to_next;
+  ethernet_llc_snap_and_cdp_header_t *h0;
+  vnet_hw_interface_t *hw;
+  u32 bi0;
+  vlib_buffer_t *b0;
+  u8 *t0;
+  u16 checksum;
+  int nbytes_to_checksum;
+  int i;
+  vlib_frame_t *f;
+  vlib_main_t *vm = cm->vlib_main;
+  vnet_main_t *vnm = cm->vnet_main;
+
+  for (i = 0; i < count; i++)
+    {
+      /*
+       * see cdp_periodic_init() to understand what's already painted
+       * into the buffer by the packet template mechanism
+       */
+      h0 = vlib_packet_template_get_packet
+	(vm, &cm->packet_templates[n->packet_template_index], &bi0);
+
+      /* Add the interface's ethernet source address */
+      hw = vnet_get_sup_hw_interface (vnm, n->sw_if_index);
+
+      clib_memcpy (h0->ethernet.src_address, hw->hw_address,
+		   vec_len (hw->hw_address));
+
+      t0 = (u8 *) & h0->cdp.data;
+
+      /* add TLVs */
+      add_tlvs (cm, hw, &t0);
+
+      /* add the cdp packet checksum */
+      nbytes_to_checksum = t0 - (u8 *) & h0->cdp;
+      checksum = cdp_checksum (&h0->cdp, nbytes_to_checksum);
+      h0->cdp.checksum = htons (checksum);
+
+      /* Set the outbound packet length */
+      b0 = vlib_get_buffer (vm, bi0);
+      b0->current_length = nbytes_to_checksum + sizeof (*h0)
+	- sizeof (cdp_hdr_t);
+
+      /* And the outbound interface */
+      vnet_buffer (b0)->sw_if_index[VLIB_TX] = hw->sw_if_index;
+
+      /* Set the 802.3 ethernet length */
+      h0->ethernet.len = htons (b0->current_length
+				- sizeof (ethernet_802_3_header_t));
+
+      /* And output the packet on the correct interface */
+      f = vlib_get_frame_to_node (vm, hw->output_node_index);
+      to_next = vlib_frame_vector_args (f);
+      to_next[0] = bi0;
+      f->n_vectors = 1;
+
+      vlib_put_frame_to_node (vm, hw->output_node_index, f);
+      n->last_sent = vlib_time_now (vm);
+    }
+}
+
+/*
+ * send a cdp pkt on an hdlc interface
+ */
+static void
+send_hdlc_hello (cdp_main_t * cm, cdp_neighbor_t * n, int count)
+{
+  u32 *to_next;
+  hdlc_and_cdp_header_t *h0;
+  vnet_hw_interface_t *hw;
+  u32 bi0;
+  vlib_buffer_t *b0;
+  u8 *t0;
+  u16 checksum;
+  int nbytes_to_checksum;
+  int i;
+  vlib_frame_t *f;
+  vlib_main_t *vm = cm->vlib_main;
+  vnet_main_t *vnm = cm->vnet_main;
+
+  for (i = 0; i < count; i++)
+    {
+      /*
+       * see cdp_periodic_init() to understand what's already painted
+       * into the buffer by the packet template mechanism
+       */
+      h0 = vlib_packet_template_get_packet
+	(vm, &cm->packet_templates[n->packet_template_index], &bi0);
+
+      hw = vnet_get_sup_hw_interface (vnm, n->sw_if_index);
+
+      t0 = (u8 *) & h0->cdp.data;
+
+      /* add TLVs */
+      add_tlvs (cm, hw, &t0);
+
+      /* add the cdp packet checksum */
+      nbytes_to_checksum = t0 - (u8 *) & h0->cdp;
+      checksum = cdp_checksum (&h0->cdp, nbytes_to_checksum);
+      h0->cdp.checksum = htons (checksum);
+
+      /* Set the outbound packet length */
+      b0 = vlib_get_buffer (vm, bi0);
+      b0->current_length = nbytes_to_checksum + sizeof (*h0)
+	- sizeof (cdp_hdr_t);
+
+      /* And output the packet on the correct interface */
+      f = vlib_get_frame_to_node (vm, hw->output_node_index);
+      to_next = vlib_frame_vector_args (f);
+      to_next[0] = bi0;
+      f->n_vectors = 1;
+
+      vlib_put_frame_to_node (vm, hw->output_node_index, f);
+      n->last_sent = vlib_time_now (vm);
+    }
+}
+
+/*
+ * send a cdp pkt on an srp interface
+ */
+static void
+send_srp_hello (cdp_main_t * cm, cdp_neighbor_t * n, int count)
+{
+  u32 *to_next;
+  srp_and_cdp_header_t *h0;
+  vnet_hw_interface_t *hw;
+  u32 bi0;
+  vlib_buffer_t *b0;
+  u8 *t0;
+  u16 checksum;
+  int nbytes_to_checksum;
+  int i;
+  vlib_frame_t *f;
+  vlib_main_t *vm = cm->vlib_main;
+  vnet_main_t *vnm = cm->vnet_main;
+
+  for (i = 0; i < count; i++)
+    {
+      /*
+       * see cdp_periodic_init() to understand what's already painted
+       * into the buffer by the packet template mechanism
+       */
+      h0 = vlib_packet_template_get_packet
+	(vm, &cm->packet_templates[n->packet_template_index], &bi0);
+
+      hw = vnet_get_sup_hw_interface (vnm, n->sw_if_index);
+
+      t0 = (u8 *) & h0->cdp.data;
+
+      /* add TLVs */
+      add_tlvs (cm, hw, &t0);
+
+      /* Add the interface's ethernet source address */
+      clib_memcpy (h0->ethernet.src_address, hw->hw_address,
+		   vec_len (hw->hw_address));
+
+      /* add the cdp packet checksum */
+      nbytes_to_checksum = t0 - (u8 *) & h0->cdp;
+      checksum = cdp_checksum (&h0->cdp, nbytes_to_checksum);
+      h0->cdp.checksum = htons (checksum);
+
+      /* Set the outbound packet length */
+      b0 = vlib_get_buffer (vm, bi0);
+      b0->current_length = nbytes_to_checksum + sizeof (*h0)
+	- sizeof (cdp_hdr_t);
+
+      /* And output the packet on the correct interface */
+      f = vlib_get_frame_to_node (vm, hw->output_node_index);
+      to_next = vlib_frame_vector_args (f);
+      to_next[0] = bi0;
+      f->n_vectors = 1;
+
+      vlib_put_frame_to_node (vm, hw->output_node_index, f);
+      n->last_sent = vlib_time_now (vm);
+    }
+}
+
+/*
+ * Decide which cdp packet template to use
+ */
+static int
+pick_packet_template (cdp_main_t * cm, cdp_neighbor_t * n)
+{
+  n->packet_template_index = CDP_PACKET_TEMPLATE_ETHERNET;
+
+  return 0;
+}
+
+/* Send a cdp neighbor announcement */
+static void
+send_hello (cdp_main_t * cm, cdp_neighbor_t * n, int count)
+{
+  if (n->packet_template_index == (u8) ~ 0)
+    {
+      /* If we don't know how to talk to this peer, don't try again */
+      if (pick_packet_template (cm, n))
+	{
+	  n->last_sent = 1e70;
+	  return;
+	}
+    }
+
+  switch (n->packet_template_index)
+    {
+    case CDP_PACKET_TEMPLATE_ETHERNET:
+      send_ethernet_hello (cm, n, count);
+      break;
+
+    case CDP_PACKET_TEMPLATE_HDLC:
+      send_hdlc_hello (cm, n, count);
+      break;
+
+    case CDP_PACKET_TEMPLATE_SRP:
+      send_srp_hello (cm, n, count);
+      break;
+
+    default:
+      ASSERT (0);
+    }
+  n->last_sent = vlib_time_now (cm->vlib_main);
+}
+
+static void
+delete_neighbor (cdp_main_t * cm, cdp_neighbor_t * n, int want_broadcast)
+{
+  hash_unset (cm->neighbor_by_sw_if_index, n->sw_if_index);
+  vec_free (n->device_name);
+  vec_free (n->version);
+  vec_free (n->port_id);
+  vec_free (n->platform);
+  vec_free (n->last_rx_pkt);
+  pool_put (cm->neighbors, n);
+}
+
+void
+cdp_periodic (vlib_main_t * vm)
+{
+  cdp_main_t *cm = &cdp_main;
+  cdp_neighbor_t *n;
+  f64 now = vlib_time_now (vm);
+  vnet_sw_interface_t *sw;
+  static u32 *delete_list = 0;
+  int i;
+  static cdp_neighbor_t **n_list = 0;
+
+  /* *INDENT-OFF* */
+  pool_foreach (n, cm->neighbors,
+  ({
+    vec_add1 (n_list, n);
+  }));
+  /* *INDENT-ON* */
+
+  /* Across all cdp neighbors known to the system */
+  for (i = 0; i < vec_len (n_list); i++)
+    {
+      n = n_list[i];
+
+      /* "no cdp run" provisioned on the interface? */
+      if (n->disabled == 1)
+	continue;
+
+      sw = vnet_get_sw_interface (cm->vnet_main, n->sw_if_index);
+
+      /* Interface shutdown or rx timeout? */
+      if (!(sw->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
+	  || (now > (n->last_heard + (f64) n->ttl_in_seconds)))
+	/* add to list of neighbors to delete */
+	vec_add1 (delete_list, n - cm->neighbors);
+      else if (n->last_sent == 0.0)
+	/* First time, send 3 hellos */
+	send_hello (cm, n, 3 /* three to begin with */ );
+      else if (now > (n->last_sent + (((f64) n->ttl_in_seconds) / 6.0)))
+	/* Normal keepalive, send one */
+	send_hello (cm, n, 1 /* one as a keepalive */ );
+    }
+
+  for (i = 0; i < vec_len (delete_list); i++)
+    {
+      n = vec_elt_at_index (cm->neighbors, delete_list[i]);
+      delete_neighbor (cm, n, 1);
+    }
+  if (delete_list)
+    _vec_len (delete_list) = 0;
+  if (n_list)
+    _vec_len (n_list) = 0;
+}
+
+static clib_error_t *
+cdp_periodic_init (vlib_main_t * vm)
+{
+  cdp_main_t *cm = &cdp_main;
+
+  /* Create the ethernet cdp hello packet template */
+  {
+    ethernet_llc_snap_and_cdp_header_t h;
+
+    memset (&h, 0, sizeof (h));
+
+    /* Send to 01:00:0c:cc:cc */
+    h.ethernet.dst_address[0] = 0x01;
+    /* h.ethernet.dst_address[1] = 0x00; (memset) */
+    h.ethernet.dst_address[2] = 0x0C;
+    h.ethernet.dst_address[3] = 0xCC;
+    h.ethernet.dst_address[4] = 0xCC;
+    h.ethernet.dst_address[5] = 0xCC;
+
+    /* leave src address blank (fill in at send time) */
+
+    /* leave length blank (fill in at send time) */
+
+    /* LLC */
+    h.llc.dst_sap = h.llc.src_sap = 0xAA;	/* SNAP */
+    h.llc.control = 0x03;	/* UI (no extended control bytes) */
+
+    /* SNAP */
+    /* h.snap.oui[0] = 0x00; (memset) */
+    /* h.snap.oui[1] = 0x00; (memset) */
+    h.snap.oui[2] = 0x0C;	/* Cisco = 0x00000C */
+    h.snap.protocol = htons (0x2000);	/* CDP = 0x2000 */
+
+    /* CDP */
+    h.cdp.version = 2;
+    h.cdp.ttl = 180;
+
+    vlib_packet_template_init
+      (vm, &cm->packet_templates[CDP_PACKET_TEMPLATE_ETHERNET],
+       /* data */ &h,
+       sizeof (h),
+       /* alloc chunk size */ 8,
+       "cdp-ethernet");
+  }
+
+#if 0				/* retain for reference */
+
+  /* Create the hdlc cdp hello packet template */
+  {
+    hdlc_and_cdp_header_t h;
+
+    memset (&h, 0, sizeof (h));
+
+    h.hdlc.address = 0x0f;
+    /* h.hdlc.control = 0; (memset) */
+    h.hdlc.protocol = htons (0x2000);	/* CDP = 0x2000 */
+
+    /* CDP */
+    h.cdp.version = 2;
+    h.cdp.ttl = 180;
+
+    vlib_packet_template_init
+      (vm, &cm->packet_templates[CDP_PACKET_TEMPLATE_HDLC],
+       /* data */ &h,
+       sizeof (h),
+       /* alloc chunk size */ 8,
+       "cdp-hdlc");
+  }
+
+  /* Create the srp cdp hello packet template */
+  {
+    srp_and_cdp_header_t h;
+
+    memset (&h, 0, sizeof (h));
+
+    /* Send to 01:00:0c:cc:cc */
+    h.ethernet.dst_address[0] = 0x01;
+    /* h.ethernet.dst_address[1] = 0x00; (memset) */
+    h.ethernet.dst_address[2] = 0x0C;
+    h.ethernet.dst_address[3] = 0xCC;
+    h.ethernet.dst_address[4] = 0xCC;
+    h.ethernet.dst_address[5] = 0xCC;
+
+    /* leave src address blank (fill in at send time) */
+
+    /* The srp header is filled in at xmt */
+    h.srp.ttl = 1;
+    h.srp.priority = 7;
+    h.srp.mode = SRP_MODE_data;
+    srp_header_compute_parity (&h.srp);
+
+    /* Inner ring and parity will be set at send time */
+
+    h.ethernet.type = htons (0x2000);	/* CDP = 0x2000 */
+
+    /* CDP */
+    h.cdp.version = 2;
+    h.cdp.ttl = 180;
+
+    vlib_packet_template_init
+      (vm, &cm->packet_templates[CDP_PACKET_TEMPLATE_SRP],
+       /* data */ &h,
+       sizeof (h),
+       /* alloc chunk size */ 8,
+       "cdp-srp");
+  }
+#endif
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (cdp_periodic_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */