1 files changed, 84 insertions, 0 deletions
diff --git a/drivers/interceptor/linux_packet_internal.h b/drivers/interceptor/linux_packet_internal.h
new file mode 100644
index 0000000..dd5c049
--- /dev/null
+++ b/drivers/interceptor/linux_packet_internal.h
@@ -0,0 +1,84 @@
+/* Netfilter Driver for IPSec VPN Client
+ *
+ * Copyright(c)   2012 Samsung Electronics
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * linux_packet_internal.h
+ *
+ * Linux interceptor specific defines for the packet portion of the
+ * Interceptor API.
+ *
+ */
+
+#ifndef LINUX_PACKET_INTERNAL_H
+#define LINUX_PACKET_INTERNAL_H
+
+#include "kernel_includes.h"
+
+/* Internal packet structure, used to encapsulate the kernel structure
+   for the generic packet processing engine. */
+
+typedef struct SshInterceptorInternalPacketRec
+{
+  /* Generic packet structure */
+  struct SshInterceptorPacketRec packet;
+
+  /* Backpointer to interceptor */
+  SshInterceptor interceptor;
+
+  /* Kernel skb structure. */
+  struct sk_buff *skb;
+
+  /* The processor from which this packet was allocated from the freelist */
+  unsigned int cpu;
+
+  size_t iteration_offset;
+  size_t iteration_bytes;
+
+  /* These are SshUInt32's for export/import */
+  SshUInt32 original_ifnum;
+
+  SshUInt16 borrowed : 1; /* From spare resource, free after use */
+} *SshInterceptorInternalPacket;
+
+
+/* Typical needed tailroom: ESP trailer (worstcase ~27B).
+   Typical needed headroom: media, IPIP, ESP (~60B for IPv4, ~80B for IPv6)
+   Worstcase headroom:      media, UDP(8), NAT-T(12), IPIP(~20), ESP(22)  */
+
+/* The amount of headroom reserved for network interface processing. The
+   interceptor ensures that all packets passed to NIC driver will have atleast
+   this much headroom. */
+#ifndef SSH_IPSEC_IP_ONLY_INTERCEPTOR
+/* With media level interceptor the SSH_INTERCEPTOR_PACKET_HARD_HEAD_ROOM
+   includes the media header length. Let us use up the full skb if necessary.
+   This is important for reducing overhead in the forwarding case. */
+#define SSH_INTERCEPTOR_PACKET_HARD_HEAD_ROOM 0
+#else
+/* Ensure that packet has always enough headroom for an aligned
+   ethernet header. */
+#define SSH_INTERCEPTOR_PACKET_HARD_HEAD_ROOM 16
+#endif /* !SSH_IPSEC_IP_ONLY_INTERCEPTOR */
+
+/* Amount of head- and tailroom to reserve when allocating or duplicating
+   a packet. These values are optimised for IPsec processing. */
+#define SSH_INTERCEPTOR_PACKET_HEAD_ROOM      (80)
+#define SSH_INTERCEPTOR_PACKET_TAIL_ROOM      (30)
+
+#define SSH_LINUX_ALLOC_SKB_GFP_MASK (GFP_ATOMIC)
+
+#ifdef LINUX_HAS_SKB_CLONE_WRITABLE
+#define SSH_SKB_WRITABLE(_skb, _len)				\
+  (!skb_cloned((_skb)) || skb_clone_writable((_skb), (_len)))
+#else /* LINUX_HAS_SKB_CLONE_WRITABLE */
+#define SSH_SKB_WRITABLE(_skb, _len)		\
+  (!skb_cloned((_skb)))
+#endif /* LINUX_HAS_SKB_CLONE_WRITABLE */
+
+#endif /* LINUX_PACKET_INTERNAL_H */