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authorNathan Skrzypczak <nathan.skrzypczak@gmail.com>2020-09-11 17:30:06 +0200
committerDave Barach <openvpp@barachs.net>2020-09-25 19:55:39 +0000
commitce25b60de5536e2f79bb72e929e70ccc1a75e0f8 (patch)
treedb5b9b18b321bb1dec2f0742afffd647695d12ce /src/plugins/cnat/cnat_src_policy.h
parent613b2c3c78fbec12cc87a0095ee5488252449698 (diff)
cnat: Introduce parametric source policy
Type: feature Change-Id: I60ae9dd1c100b587d1902a20596b99a5c8a95df7 Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>
Diffstat (limited to 'src/plugins/cnat/cnat_src_policy.h')
-rw-r--r--src/plugins/cnat/cnat_src_policy.h78
1 files changed, 78 insertions, 0 deletions
diff --git a/src/plugins/cnat/cnat_src_policy.h b/src/plugins/cnat/cnat_src_policy.h
new file mode 100644
index 00000000000..d76de8bd2cd
--- /dev/null
+++ b/src/plugins/cnat/cnat_src_policy.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2020 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.
+ */
+
+#ifndef __CNAT_SRC_POLICY_H__
+#define __CNAT_SRC_POLICY_H__
+
+// #include <vnet/udp/udp.h>
+#include <cnat/cnat_types.h>
+#include <cnat/cnat_session.h>
+#include <cnat/cnat_translation.h>
+
+typedef enum
+{
+ CNAT_SPORT_PROTO_TCP,
+ CNAT_SPORT_PROTO_UDP,
+ CNAT_SPORT_PROTO_ICMP,
+ CNAT_SPORT_PROTO_ICMP6,
+ CNAT_N_SPORT_PROTO
+} cnat_sport_proto_t;
+
+typedef enum cnat_source_policy_errors_
+{
+ CNAT_SOURCE_ERROR_EXHAUSTED_PORTS,
+ CNAT_SOURCE_ERROR_USE_DEFAULT,
+ CNAT_SOURCE_N_ERRORS,
+} cnat_source_policy_errors_t;
+
+typedef struct cnat_src_port_allocator_
+{
+ /* Source ports bitmap for snat */
+ clib_bitmap_t *bmap;
+
+ /* Lock for src_ports access */
+ clib_spinlock_t lock;
+} cnat_src_port_allocator_t;
+
+/* function to use to compute source (IP, port) for a new session to a vip */
+typedef cnat_source_policy_errors_t (*cnat_vip_source_policy_t)
+ (vlib_main_t * vm, vlib_buffer_t * b, cnat_session_t * session,
+ u32 * rsession_flags, const cnat_translation_t * ct,
+ cnat_node_ctx_t * ctx);
+
+typedef struct cnat_src_policy_main_
+{
+ cnat_vip_source_policy_t vip_policy;
+ cnat_vip_source_policy_t default_policy;
+
+ /* Per proto source ports allocator for snat */
+ cnat_src_port_allocator_t *src_ports;
+} cnat_src_policy_main_t;
+
+extern cnat_src_policy_main_t cnat_src_policy_main;
+
+void cnat_register_vip_src_policy (cnat_vip_source_policy_t fp);
+int cnat_allocate_port (u16 * port, ip_protocol_t iproto);
+void cnat_free_port (u16 port, ip_protocol_t iproto);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
+
+#endif