1 files changed, 91 insertions, 0 deletions
diff --git a/lib/src/protocol/ipv4.h b/lib/src/protocol/ipv4.h
new file mode 100755
index 000000000..c57485b6c
--- /dev/null
+++ b/lib/src/protocol/ipv4.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2017-2019 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 HICN_PROTOCOL_IPV4
+#define HICN_PROTOCOL_IPV4
+
+#include "../base.h"
+#include "../common.h"
+#include "../protocol.h"
+
+/* Headers were adapted from linux' definitions in netinet/ip.h */
+
+typedef struct
+{
+  union
+  {
+    struct
+    {
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+      u8 ihl:4;
+      u8 version:4;
+#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+      u8 version:4;
+      u8 ihl:4;
+#else
+#error "Unsupported endianness"
+#endif
+    };
+
+    u8 version_ihl;
+  };
+  u8 tos;
+  u16 len;
+  u16 id;
+  u16 frag_off;
+  u8 ttl;
+  u8 protocol;
+  u16 csum;
+  ip4_address_t saddr;
+  ip4_address_t daddr;
+} _ipv4_header_t;
+
+#define ipv4_header_bytes(ipv4_header) (sizeof(u32) * (ipv4_header->version_ihl & 0xf))
+
+#define IPV4_HDRLEN sizeof(_ipv4_header_t)
+
+typedef struct
+{
+  ip4_address_t ip_src;
+  ip4_address_t ip_dst;
+  u8 zero;
+  u8 protocol;
+  u16 size;
+} ipv4_pseudo_header_t;
+
+#define IPV4_PSHDRLEN sizeof(ipv4_pseudo_header_t)
+
+/* Default field values */
+#define IPV4_DEFAULT_VERSION         4
+#define IPV4_DEFAULT_IHL             5
+#define IPV4_DEFAULT_TOS             0
+#define IPV4_DEFAULT_PAYLOAD_LENGTH  0
+#define IPV4_DEFAULT_ID              300
+#define IPV4_DEFAULT_FRAG_OFF        0x000
+#define IPV4_DEFAULT_TTL             64
+#define IPV4_DEFAULT_PROTOCOL        IPPROTO_TCP
+#define IPV4_DEFAULT_SRC_IP          0, 0, 0, 0
+#define IPV4_DEFAULT_DST_IP          0, 0, 0, 0
+
+
+#endif /* HICN_PROTOCOL_IPV4 */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */