IPSEC: minor refactor

No function change. Only breaking the monster ipsec.[hc]
into smaller constituent parts

Change-Id: I3fd4d2d041673db5865d46a4002f6bd383f378af
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 118 insertions, 0 deletions

diff --git a/src/vnet/ipsec/ipsec_spd.c b/src/vnet/ipsec/ipsec_spd.c
new file mode 100644
index 00000000000..7e17bb91fdb
--- /dev/null
+++ b/src/vnet/ipsec/ipsec_spd.c
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2015 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/ipsec/ipsec.h>
+
+int
+ipsec_add_del_spd (vlib_main_t * vm, u32 spd_id, int is_add)
+{
+  ipsec_main_t *im = &ipsec_main;
+  ipsec_spd_t *spd = 0;
+  uword *p;
+  u32 spd_index, k, v;
+
+  p = hash_get (im->spd_index_by_spd_id, spd_id);
+  if (p && is_add)
+    return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
+  if (!p && !is_add)
+    return VNET_API_ERROR_NO_SUCH_ENTRY;
+
+  if (!is_add)			/* delete */
+    {
+      spd_index = p[0];
+      spd = pool_elt_at_index (im->spds, spd_index);
+      if (!spd)
+	return VNET_API_ERROR_INVALID_VALUE;
+      /* *INDENT-OFF* */
+      hash_foreach (k, v, im->spd_index_by_sw_if_index, ({
+        if (v == spd_index)
+          ipsec_set_interface_spd(vm, k, spd_id, 0);
+      }));
+      /* *INDENT-ON* */
+      hash_unset (im->spd_index_by_spd_id, spd_id);
+      pool_free (spd->policies);
+      vec_free (spd->ipv4_outbound_policies);
+      vec_free (spd->ipv6_outbound_policies);
+      vec_free (spd->ipv4_inbound_protect_policy_indices);
+      vec_free (spd->ipv4_inbound_policy_discard_and_bypass_indices);
+      pool_put (im->spds, spd);
+    }
+  else				/* create new SPD */
+    {
+      pool_get (im->spds, spd);
+      clib_memset (spd, 0, sizeof (*spd));
+      spd_index = spd - im->spds;
+      spd->id = spd_id;
+      hash_set (im->spd_index_by_spd_id, spd_id, spd_index);
+    }
+  return 0;
+}
+
+int
+ipsec_set_interface_spd (vlib_main_t * vm, u32 sw_if_index, u32 spd_id,
+			 int is_add)
+{
+  ipsec_main_t *im = &ipsec_main;
+  ip4_ipsec_config_t config;
+
+  u32 spd_index;
+  uword *p;
+
+  p = hash_get (im->spd_index_by_spd_id, spd_id);
+  if (!p)
+    return VNET_API_ERROR_SYSCALL_ERROR_1;	/* no such spd-id */
+
+  spd_index = p[0];
+
+  p = hash_get (im->spd_index_by_sw_if_index, sw_if_index);
+  if (p && is_add)
+    return VNET_API_ERROR_SYSCALL_ERROR_1;	/* spd already assigned */
+
+  if (is_add)
+    {
+      hash_set (im->spd_index_by_sw_if_index, sw_if_index, spd_index);
+    }
+  else
+    {
+      hash_unset (im->spd_index_by_sw_if_index, sw_if_index);
+    }
+
+  clib_warning ("sw_if_index %u spd_id %u spd_index %u",
+		sw_if_index, spd_id, spd_index);
+
+  /* enable IPsec on TX */
+  vnet_feature_enable_disable ("ip4-output", "ipsec4-output-feature",
+			       sw_if_index, is_add, 0, 0);
+  vnet_feature_enable_disable ("ip6-output", "ipsec6-output-feature",
+			       sw_if_index, is_add, 0, 0);
+
+  config.spd_index = spd_index;
+
+  /* enable IPsec on RX */
+  vnet_feature_enable_disable ("ip4-unicast", "ipsec4-input-feature",
+			       sw_if_index, is_add, &config, sizeof (config));
+  vnet_feature_enable_disable ("ip6-unicast", "ipsec6-input-feature",
+			       sw_if_index, is_add, &config, sizeof (config));
+
+  return 0;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */