Move the vnet cdp protocol implementation to a plugin

Add a binary API and debug cli to enable/disable cdp. cdp is disabled
by default.

Change-Id: I307c7e38dfda38e36ff3325f65de7036c34d89b1
Signed-off-by: Dave Barach <dave@barachs.net>

1 files changed, 0 insertions, 515 deletions

diff --git a/src/vnet/cdp/cdp_periodic.c b/src/vnet/cdp/cdp_periodic.c
deleted file mode 100644
index 8899c49ce9c..00000000000
--- a/src/vnet/cdp/cdp_periodic.c
+++ /dev/null
@@ -1,515 +0,0 @@
-/*
- * 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);
-
-      if (!h0)
-	break;
-
-      /* 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:
- */