mactime: add the "mactime.json" builtin URL

If the http static server plugin is enabled, register the name
"mactime.json" with the server. Visiting <web-root>/mactime.json
produces a json brain-dump of the mactime table.

Type: feature

Signed-off-by: Dave Barach <dave@barachs.net>
Change-Id: Ie39b0c776675864a85251b8c07fbf719d399f6de

1 files changed, 172 insertions, 0 deletions

diff --git a/src/plugins/mactime/builtins.c b/src/plugins/mactime/builtins.c
new file mode 100644
index 00000000000..a0d7b5f731e
--- /dev/null
+++ b/src/plugins/mactime/builtins.c
@@ -0,0 +1,172 @@
+#include <vnet/vnet.h>
+#include <builtinurl/builtinurl.h>
+#include <http_static/http_static.h>
+#include <mactime/mactime.h>
+#include <vlib/unix/plugin.h>
+
+static int
+handle_get_mactime (u8 * request, http_session_t * hs)
+{
+  mactime_main_t *mm = &mactime_main;
+  mactime_device_t *dp;
+  u8 *macstring = 0;
+  char *status_string;
+  u32 *pool_indices = 0;
+  int current_status = 99;
+  int i, j;
+  f64 now;
+  vlib_counter_t allow, drop;
+  ethernet_arp_ip4_entry_t *n, *pool;
+  char *q = "\"";
+  u8 *s = 0;
+  int need_comma = 0;
+
+  vec_reset_length (mm->arp_cache_copy);
+  pool = ip4_neighbors_pool ();
+
+  pool_foreach (n, pool, (
+			   {
+			   vec_add1 (mm->arp_cache_copy, n[0]);}));
+
+  now = clib_timebase_now (&mm->timebase);
+
+  if (PREDICT_FALSE ((now - mm->sunday_midnight) > 86400.0 * 7.0))
+    mm->sunday_midnight = clib_timebase_find_sunday_midnight (now);
+
+    /* *INDENT-OFF* */
+    pool_foreach (dp, mm->devices,
+    ({
+        vec_add1 (pool_indices, dp - mm->devices);
+    }));
+    /* *INDENT-ON* */
+
+  s = format (s, "{%smactime%s: [\n", q, q);
+
+  for (i = 0; i < vec_len (pool_indices); i++)
+    {
+      dp = pool_elt_at_index (mm->devices, pool_indices[i]);
+
+      /* Check dynamic ranges */
+      for (j = 0; j < vec_len (dp->ranges); j++)
+	{
+	  clib_timebase_range_t *r = dp->ranges + j;
+	  f64 start0, end0;
+
+	  start0 = r->start + mm->sunday_midnight;
+	  end0 = r->end + mm->sunday_midnight;
+
+	  if (now >= start0 && now <= end0)
+	    {
+	      if (dp->flags & MACTIME_DEVICE_FLAG_DYNAMIC_ALLOW)
+		current_status = 3;
+	      else if (dp->flags & MACTIME_DEVICE_FLAG_DYNAMIC_ALLOW_QUOTA)
+		current_status = 5;
+	      else
+		current_status = 2;
+	      goto print;
+	    }
+	}
+      if (dp->flags & MACTIME_DEVICE_FLAG_STATIC_DROP)
+	current_status = 0;
+      if (dp->flags & MACTIME_DEVICE_FLAG_STATIC_ALLOW)
+	current_status = 1;
+      if (dp->flags & MACTIME_DEVICE_FLAG_DYNAMIC_ALLOW)
+	current_status = 2;
+      if (dp->flags & MACTIME_DEVICE_FLAG_DYNAMIC_DROP)
+	current_status = 3;
+      if (dp->flags & MACTIME_DEVICE_FLAG_DYNAMIC_ALLOW_QUOTA)
+	current_status = 4;
+
+    print:
+      vec_reset_length (macstring);
+
+      macstring = format (0, "%U", format_mac_address, dp->mac_address);
+
+      if (need_comma)
+	s = format (s, "},\n");
+
+      need_comma = 1;
+      s = format (s, "{%smac_address%s: %s%s%s, ", q, q, q, macstring, q);
+
+      switch (current_status)
+	{
+	case 0:
+	  status_string = "static drop";
+	  break;
+	case 1:
+	  status_string = "static allow";
+	  break;
+	case 2:
+	  status_string = "dynamic drop";
+	  break;
+	case 3:
+	  status_string = "dynamic allow";
+	  break;
+	case 4:
+	  status_string = "d-quota inact";
+	  break;
+	case 5:
+	  status_string = "d-quota activ";
+	  break;
+	default:
+	  status_string = "code bug!";
+	  break;
+	}
+      vlib_get_combined_counter (&mm->allow_counters, dp - mm->devices,
+				 &allow);
+      vlib_get_combined_counter (&mm->drop_counters, dp - mm->devices, &drop);
+      s = format (s, "%sname%s: %s%s%s, %sstatus%s: %s%s%s,",
+		  q, q, q, dp->device_name, q, q, q, q, status_string, q);
+      s = format (s, "%sallow_pkts%s: %lld,", q, q, allow.packets);
+      s = format (s, "%sallow_bytes%s: %lld,", q, q, allow.bytes);
+      s = format (s, "%sdrop_pkts%s: %lld", q, q, drop.packets);
+
+      for (j = 0; j < vec_len (mm->arp_cache_copy); j++)
+	{
+	  n = mm->arp_cache_copy + j;
+	  if (!memcmp (dp->mac_address, n->mac.bytes, sizeof (n->mac)))
+	    {
+	      s = format (s, ", %sip4_address%s: %s%U%s", q, q,
+			  q, format_ip4_address, &n->ip4_address, q);
+	      break;
+	    }
+	}
+    }
+  if (need_comma)
+    s = format (s, "}\n");
+  s = format (s, "]}\n");
+  vec_free (macstring);
+  vec_free (pool_indices);
+
+  hs->data = s;
+  hs->data_offset = 0;
+  hs->cache_pool_index = ~0;
+  hs->free_data = 1;
+  return 0;
+}
+
+void
+mactime_url_init (vlib_main_t * vm)
+{
+  void (*fp) (void *, char *, int);
+
+  /* Look up the builtin URL registration handler */
+  fp = vlib_get_plugin_symbol ("http_static_plugin.so",
+			       "http_static_server_register_builtin_handler");
+
+  if (fp == 0)
+    {
+      clib_warning ("http_static_plugin.so not loaded...");
+      return;
+    }
+
+  (*fp) (handle_get_mactime, "mactime.json", HTTP_BUILTIN_METHOD_GET);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */