1 files changed, 96 insertions, 0 deletions
diff --git a/src/vnet/ip/ip_frag.h b/src/vnet/ip/ip_frag.h
new file mode 100644
index 00000000000..348f5a2fbc6
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+++ b/src/vnet/ip/ip_frag.h
@@ -0,0 +1,96 @@
+/*---------------------------------------------------------------------------
+ * Copyright (c) 2009-2014 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.
+ *---------------------------------------------------------------------------
+ */
+/*
+ * IPv4 and IPv6 Fragmentation Nodes
+ *
+ * A packet sent to those nodes require the following
+ * buffer attributes to be set:
+ * ip_frag.header_offset :
+ *     Where to find the IPv4 (or IPv6) header in the packet. Previous
+ *     bytes are left untouched and copied in every fragment. The fragments
+ *     are then appended. This option is used for fragmented packets
+ *     that are encapsulated.
+ * ip_frag.mtu :
+ *     Maximum size of IP packets, header included, but ignoring
+ *     the 'ip_frag.header_offset' copied bytes.
+ * ip_frag.next_index :
+ *     One of ip_frag_next_t, indicating to which exit node the fragments
+ *     should be sent to.
+ *
+ */
+
+#ifndef IP_FRAG_H
+#define IP_FRAG_H
+
+#include <vnet/vnet.h>
+
+#define IP_FRAG_FLAG_IP4_HEADER 0x01	//Encapsulating IPv4 header
+#define IP_FRAG_FLAG_IP6_HEADER 0x02	//Encapsulating IPv6 header
+
+#define IP4_FRAG_NODE_NAME "ip4-frag"
+#define IP6_FRAG_NODE_NAME "ip6-frag"
+
+extern vlib_node_registration_t ip4_frag_node;
+extern vlib_node_registration_t ip6_frag_node;
+
+typedef enum
+{
+  IP4_FRAG_NEXT_IP4_LOOKUP,
+  IP4_FRAG_NEXT_IP6_LOOKUP,
+  IP4_FRAG_NEXT_ICMP_ERROR,
+  IP4_FRAG_NEXT_DROP,
+  IP4_FRAG_N_NEXT
+} ip4_frag_next_t;
+
+typedef enum
+{
+  IP6_FRAG_NEXT_IP4_LOOKUP,
+  IP6_FRAG_NEXT_IP6_LOOKUP,
+  IP6_FRAG_NEXT_DROP,
+  IP6_FRAG_N_NEXT
+} ip6_frag_next_t;
+
+#define foreach_ip_frag_error				\
+  /* Must be first. */					\
+ _(NONE, "packet fragmented")				\
+ _(SMALL_PACKET, "packet smaller than MTU")             \
+ _(FRAGMENT_SENT, "number of sent fragments")           \
+ _(CANT_FRAGMENT_HEADER, "can't fragment header")	\
+ _(DONT_FRAGMENT_SET, "can't fragment this packet")	\
+ _(MALFORMED, "malformed packet")                       \
+ _(MEMORY, "could not allocate buffer")                 \
+ _(UNKNOWN, "unknown error")
+
+typedef enum
+{
+#define _(sym,str) IP_FRAG_ERROR_##sym,
+  foreach_ip_frag_error
+#undef _
+    IP_FRAG_N_ERROR,
+} ip_frag_error_t;
+
+void ip_frag_set_vnet_buffer (vlib_buffer_t * b, u16 offset, u16 mtu,
+			      u8 next_index, u8 flags);
+
+#endif /* ifndef IP_FRAG_H */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */