From Pascal Quantin: add PDCP framing method over UDP.

svn path=/trunk/; revision=31243

1 files changed, 76 insertions, 0 deletions

diff --git a/epan/dissectors/packet-pdcp-lte.h b/epan/dissectors/packet-pdcp-lte.h
index cc70c5a7fa..c525e6b5bb 100644
--- a/epan/dissectors/packet-pdcp-lte.h
+++ b/epan/dissectors/packet-pdcp-lte.h
@@ -87,3 +87,79 @@ typedef struct pdcp_lte_info
     unsigned short     profile;
 } pdcp_lte_info;
 
+
+/*****************************************************************/
+/* UDP framing format                                            */
+/* -----------------------                                       */
+/* Several people have asked about dissecting PDCP by framing    */
+/* PDUs over IP.  A suggested format over UDP has been defined   */
+/* and implemented by this dissector, using the definitions      */
+/* below. A link to an example program showing you how to encode */
+/* these headers and send LTE PDCP PDUs on a UDP socket is       */
+/* provided at http://wiki.wireshark.org/PDCP-LTE                */
+/*                                                               */
+/* A heuristic dissecter (enabled by a preference) will          */
+/* recognise a signature at the beginning of these frames.       */
+/* Until someone is using this format, suggestions for changes   */
+/* are welcome.                                                  */
+/*****************************************************************/
+
+
+/* Signature.  Rather than try to define a port for this, or make the
+   port number a preference, frames will start with this string (with no
+   terminating NULL */
+#define PDCP_LTE_START_STRING "pdcp-lte"
+
+/* Fixed fields.  This is followed by the following 3 mandatory fields:
+   - no_header_pdu (1 byte)
+   - plane (1 byte)
+   - rohc_compression ( byte)
+   (where the allowed values are defined above) */
+
+/* Conditional field. This field is mandatory in case of User Plane PDCP PDU.
+   The format is to have the tag, followed by the value (there is no length field,
+   its implicit from the tag). The allowed values are defined above. */
+
+#define PDCP_LTE_SEQNUM_LENGTH_TAG          0x02
+/* 1 byte */
+
+/* Optional fields. Attaching this info to frames will allow you
+   to show you display/filter/plot/add-custom-columns on these fields, so should
+   be added if available.
+   The format is to have the tag, followed by the value (there is no length field,
+   its implicit from the tag) */
+
+#define PDCP_LTE_DIRECTION_TAG              0x03
+/* 1 byte */
+
+#define PDCP_LTE_LOG_CHAN_TYPE_TAG          0x04
+/* 1 byte */
+
+#define PDCP_LTE_BCCH_TRANSPORT_TYPE_TAG    0x05
+/* 1 byte */
+
+#define PDCP_LTE_ROHC_IP_VERSION_TAG        0x06
+/* 2 bytes, network order */
+
+#define PDCP_LTE_ROHC_CID_INC_INFO_TAG      0x07
+/* 1 byte */
+
+#define PDCP_LTE_ROHC_LARGE_CID_PRES_TAG    0x08
+/* 1 byte */
+
+#define PDCP_LTE_ROHC_MODE_TAG              0x09
+/* 1 byte */
+
+#define PDCP_LTE_ROHC_RND_TAG               0x0A
+/* 1 byte */
+
+#define PDCP_LTE_ROHC_UDP_CHECKSUM_PRES_TAG 0x0B
+/* 1 byte */
+
+#define PDCP_LTE_ROHC_PROFILE_TAG           0x0C
+/* 2 bytes, network order */
+
+
+/* PDCP PDU. Following this tag comes the actual PDCP PDU (there is no length, the PDU
+   continues until the end of the frame) */
+#define PDCP_LTE_PAYLOAD_TAG                0x01