Partial implementation of UMTS FP. Currently only works with Catapult DCT2000 format files, as need extra information about packet when decoding. There are a few TODOs (notably E-DCH channels), but the current version gives OK coverage.
svn path=/trunk/; revision=19130
This commit is contained in:
Martin Mathieson
parent
6e040b3a83
commit
76192b1c6c
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@ -651,6 +651,7 @@ DISSECTOR_SRC = \
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packet-uma.c \
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packet-udp.c \
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packet-ulp.c \
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packet-umts_fp.c \
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packet-umts_rrc.c \
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packet-umts_rrc_ies.c \
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packet-umts_rrc_pdu_def.c \
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@ -949,6 +950,7 @@ DISSECTOR_INCLUDES = \
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packet-tr.h \
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packet-udp.h \
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packet-ulp.h \
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packet-umts_fp.h \
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packet-umts_rrc.h \
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packet-umts_rrc_ies.h \
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packet-umts_rrc_pdu_def.h \
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@ -66,6 +66,7 @@ static dissector_handle_t llc_handle;
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static dissector_handle_t sscop_handle;
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static dissector_handle_t lane_handle;
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static dissector_handle_t ilmi_handle;
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static dissector_handle_t fp_handle;
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static dissector_handle_t data_handle;
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/*
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@ -1014,7 +1015,8 @@ dissect_reassembled_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
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proto_tree_add_text(atm_tree, tvb, 0, 0, "Cells: %u",
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reported_length/48);
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}
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if (length >= reported_length) {
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if (pinfo->pseudo_header->atm.aal == AAL_5 &&
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length >= reported_length) {
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/*
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* XXX - what if the packet is truncated? Can that happen?
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* What if you capture with Windows Sniffer on an ATM link
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@ -1051,23 +1053,23 @@ dissect_reassembled_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
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if (tree) {
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if (pad_length > 0) {
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proto_tree_add_text(atm_tree, tvb, aal5_length, pad_length,
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"Padding");
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"Padding");
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}
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proto_tree_add_text(atm_tree, tvb, length - 8, 1, "AAL5 UU: 0x%02x",
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tvb_get_guint8(tvb, length - 8));
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tvb_get_guint8(tvb, length - 8));
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proto_tree_add_text(atm_tree, tvb, length - 7, 1, "AAL5 CPI: 0x%02x",
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tvb_get_guint8(tvb, length - 7));
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tvb_get_guint8(tvb, length - 7));
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proto_tree_add_text(atm_tree, tvb, length - 6, 2, "AAL5 len: %u",
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aal5_length);
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aal5_length);
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crc = tvb_get_ntohl(tvb, length - 4);
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calc_crc = update_crc(0xFFFFFFFF, tvb_get_ptr(tvb, 0, length),
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length);
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length);
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proto_tree_add_text(atm_tree, tvb, length - 4, 4,
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"AAL5 CRC: 0x%08X (%s)", crc,
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(calc_crc == 0xC704DD7B) ? "correct" : "incorrect");
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}
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"AAL5 CRC: 0x%08X (%s)", crc,
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(calc_crc == 0xC704DD7B) ? "correct" : "incorrect");
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}
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next_tvb = tvb_new_subset(tvb, 0, aal5_length, aal5_length);
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}
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}
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}
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}
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}
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@ -1106,6 +1108,31 @@ dissect_reassembled_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
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}
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break;
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case AAL_2:
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switch (pinfo->pseudo_header->atm.type) {
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case TRAF_UMTS_FP:
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/* Skip first 4 bytes of message
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- CID
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- length
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- UUI (always 26 to indicate last data received)
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TODO: should they be:
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- stripped earlier?
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- dissected as SSSAR sublayer? */
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next_tvb = tvb_new_subset(tvb, 4,
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tvb_length_remaining(tvb, 4),
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tvb_length_remaining(tvb, 4));
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call_dissector(fp_handle, next_tvb, pinfo, tree);
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break;
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default:
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if (tree) {
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/* Dump it as raw data. */
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call_dissector(data_handle, next_tvb, pinfo, tree);
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break;
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}
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}
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break;
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default:
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if (tree) {
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/* Dump it as raw data. */
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@ -1673,6 +1700,7 @@ proto_reg_handoff_atm(void)
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lane_handle = find_dissector("lane");
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ilmi_handle = find_dissector("ilmi");
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data_handle = find_dissector("data");
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fp_handle = find_dissector("fp");
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atm_handle = create_dissector_handle(dissect_atm, proto_atm);
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dissector_add("wtap_encap", WTAP_ENCAP_ATM_PDUS, atm_handle);
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@ -27,12 +27,15 @@
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#endif
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#include <string.h>
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#include <ctype.h>
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#include <epan/packet.h>
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#include <epan/emem.h>
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#include <epan/proto.h>
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#include <epan/prefs.h>
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#include <epan/strutil.h>
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#include <wiretap/catapult_dct2000.h>
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#include "packet-umts_fp.h"
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/* Protocol and registered fields. */
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static int proto_catapult_dct2000 = -1;
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@ -74,9 +77,19 @@ static const value_string encap_vals[] = {
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};
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#define MAX_OUTHDR_VALUES 32
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static guint outhdr_values[MAX_OUTHDR_VALUES];
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static gint outhdr_values_found = 0;
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extern int proto_fp;
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void proto_reg_handoff_catapult_dct2000(void);
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void proto_register_catapult_dct2000(void);
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static dissector_handle_t look_for_dissector(char *protocol_name);
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/* Look for the protocol data within an ipprim packet.
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Only set *data_offset if data field found. */
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@ -305,6 +318,20 @@ dissector_handle_t look_for_dissector(char *protocol_name)
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{
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return find_dissector("http");
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}
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else
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if ((strcmp(protocol_name, "fp") == 0) ||
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(strcmp(protocol_name, "fp_r4") == 0) ||
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(strcmp(protocol_name, "fp_r5") == 0) ||
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(strcmp(protocol_name, "fp_r6") == 0))
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{
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return find_dissector("fp");
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}
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else
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if ((strcmp(protocol_name, "iuup_rtp_r5") == 0) ||
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(strcmp(protocol_name, "iuup_rtp_r6") == 0))
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{
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return find_dissector("rtp");
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}
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/* Try for an exact match */
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else
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@ -314,14 +341,111 @@ dissector_handle_t look_for_dissector(char *protocol_name)
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}
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/* Populate outhdr_values array with numbers found in outhdr_string */
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void parse_outhdr_string(char *outhdr_string)
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{
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int n = 0;
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/* Populate values array */
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for (outhdr_values_found=0; n < MAX_OUTHDR_VALUES; )
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{
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guint start_i = n;
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guint digits;
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/* Find digits */
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for (digits = 0; digits < strlen(outhdr_string); digits++, n++)
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{
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if (!isdigit(outhdr_string[n]))
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{
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break;
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}
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}
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if (digits == 0)
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{
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/* No more numbers left */
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break;
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}
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/* Convert digits into value */
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outhdr_values[outhdr_values_found++] =
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atoi(format_text(outhdr_string+start_i, digits));
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/* Skip comma */
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n++;
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}
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}
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/* Fill in an FP packet info struct and attach it to the packet for the FP
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dissector to use */
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void attach_fp_info(packet_info *pinfo, gboolean received)
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{
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int i=0;
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int chan;
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int tf_start, num_chans_start;
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/* Allocate & zero struct */
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struct _fp_info *p_fp_info = se_alloc(sizeof(struct _fp_info));
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if (!p_fp_info)
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{
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return;
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}
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memset(p_fp_info, 0, sizeof(struct _fp_info));
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/* Read values from array into their places */
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if (outhdr_values_found < 5)
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{
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return;
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}
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/* Channel type */
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p_fp_info->channel = outhdr_values[i++];
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/* Node type */
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p_fp_info->node_type = outhdr_values[i++];
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p_fp_info->is_uplink = (( received && (p_fp_info->node_type == 2)) ||
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(!received && (p_fp_info->node_type == 1)));
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/* DCH CRC present */
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p_fp_info->dch_crc_present = outhdr_values[i++];
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/* How many paging indications (if PCH data) */
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p_fp_info->paging_indications = outhdr_values[i++];
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/* Number of channels (for coordinated channels) */
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p_fp_info->num_chans = outhdr_values[i++];
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/* TF size for each channel */
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tf_start = i;
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for (chan=0; chan < p_fp_info->num_chans; chan++)
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{
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p_fp_info->chan_tf_size[chan] = outhdr_values[tf_start+chan];
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}
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/* Number of TBs for each channel */
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num_chans_start = tf_start + p_fp_info->num_chans;
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for (chan=0; chan < p_fp_info->num_chans; chan++)
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{
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p_fp_info->chan_num_tbs[chan] = outhdr_values[num_chans_start+chan];
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}
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/* TODO: EDCH info */
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/* Store info in packet */
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p_add_proto_data(pinfo->fd, proto_fp, p_fp_info);
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}
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/*****************************************/
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/* Main dissection function. */
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/*****************************************/
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static void
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dissect_catapult_dct2000(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_tree *dct2000_tree;
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proto_item *ti;
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proto_tree *dct2000_tree;
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proto_item *ti;
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gint offset = 0;
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gint context_length;
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guint8 port_number;
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@ -339,6 +463,7 @@ dissect_catapult_dct2000(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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dissector_handle_t protocol_handle = 0;
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dissector_handle_t heur_protocol_handle = 0;
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int sub_dissector_result = 0;
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char *protocol_name;
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/* Protocol name */
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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@ -416,15 +541,27 @@ dissect_catapult_dct2000(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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proto_item_set_len(dct2000_tree, offset);
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/* Add useful details to protocol tree label */
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protocol_name = tvb_get_ephemeral_string(tvb, protocol_start, protocol_length);
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proto_item_append_text(ti, " context=%s.%u t=%s %c prot=%s (v=%s)",
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tvb_get_ephemeral_string(tvb, 0, context_length),
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port_number,
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tvb_get_ephemeral_string(tvb, timestamp_start, timestamp_length),
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(direction == 0) ? 'S' : 'R',
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tvb_get_ephemeral_string(tvb, protocol_start, protocol_length),
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protocol_name,
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tvb_get_ephemeral_string(tvb, variant_start, variant_length));
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/* FP protocols need info from outhdr attached */
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if ((strcmp(protocol_name, "fp") == 0) ||
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(strcmp(protocol_name, "fp_r4") == 0) ||
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(strcmp(protocol_name, "fp_r5") == 0) ||
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(strcmp(protocol_name, "fp_r6") == 0))
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{
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parse_outhdr_string(tvb_get_ephemeral_string(tvb, outhdr_start, outhdr_length));
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attach_fp_info(pinfo, direction);
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}
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/* Note that the first item of pinfo->pseudo_header->dct2000 will contain
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the pseudo-header needed (in some cases) by the wireshark dissector */
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@ -465,6 +602,23 @@ dissect_catapult_dct2000(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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protocol_handle = find_dissector("mtp2");
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break;
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case DCT2000_ENCAP_UNHANDLED:
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/* Show context.port in src or dest column as appropriate */
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if (check_col(pinfo->cinfo, COL_DEF_SRC) && direction == 0)
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{
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col_add_fstr(pinfo->cinfo, COL_DEF_SRC,
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"%s.%u",
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tvb_get_ephemeral_string(tvb, 0, context_length),
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port_number);
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}
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else
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if (check_col(pinfo->cinfo, COL_DEF_DST) && direction == 1)
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{
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col_add_fstr(pinfo->cinfo, COL_DEF_DST,
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"%s.%u",
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tvb_get_ephemeral_string(tvb, 0, context_length),
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port_number);
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}
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/* Many DCT2000 protocols have at least one IPPrim variant. If the
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protocol names match, try to find the UDP/TCP data inside them and
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pass that offset to dissector
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@ -475,8 +629,7 @@ dissect_catapult_dct2000(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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if (catapult_dct2000_try_ipprim_heuristic)
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{
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heur_protocol_handle =
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look_for_dissector((char*)tvb_get_ephemeral_string(tvb, protocol_start,
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protocol_length));
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look_for_dissector(protocol_name);
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if ((heur_protocol_handle != 0) &&
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find_ipprim_data_offset(tvb, &offset))
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{
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@ -487,9 +640,7 @@ dissect_catapult_dct2000(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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/* Try SCTP Prim heuristic if configured to */
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if (!protocol_handle && catapult_dct2000_try_sctpprim_heuristic)
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{
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heur_protocol_handle =
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look_for_dissector(tvb_get_ephemeral_string(tvb, protocol_start,
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protocol_length));
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heur_protocol_handle = look_for_dissector(protocol_name);
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if ((heur_protocol_handle != 0) &&
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(find_sctpprim_variant1_data_offset(tvb, &offset) ||
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find_sctpprim_variant3_data_offset(tvb, &offset)))
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@ -661,8 +812,5 @@ void proto_register_catapult_dct2000(void)
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"dissector matching the DCT2000 protocol name, "
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"try parsing the payload using that dissector",
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&catapult_dct2000_try_sctpprim_heuristic);
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}
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|
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File diff suppressed because it is too large
Load Diff
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@ -0,0 +1,60 @@
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/* packet-fp.h
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*
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* Martin Mathieson
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* $Id: packet-rtcp.h 18196 2006-05-21 04:49:01Z sahlberg $
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
|
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* as published by the Free Software Foundation; either version 2
|
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/* Channel types */
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#define CHANNEL_RACH_FDD 1
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#define CHANNEL_RACH_TDD 2
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#define CHANNEL_FACH_FDD 3
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#define CHANNEL_FACH_TDD 4
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#define CHANNEL_DSCH_FDD 5
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#define CHANNEL_DSCH_TDD 6
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#define CHANNEL_USCH_TDD_384 8
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#define CHANNEL_USCH_TDD_128 24
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#define CHANNEL_PCH 9
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#define CHANNEL_CPCH 10
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#define CHANNEL_BCH 11
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#define CHANNEL_DCH 12
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#define CHANNEL_HSDSCH 13
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#define CHANNEL_IUR_CPCHF 14
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#define CHANNEL_IUR_FACH 15
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#define CHANNEL_IUR_DSCH 16
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#define CHANNEL_EDCH 17
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#define CHANNEL_RACH_TDD_128 18
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/* Info attached to each FP packet */
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struct _fp_info
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{
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gboolean is_uplink;
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gint channel;
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gint node_type;
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gboolean dch_crc_present;
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gint paging_indications;
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gint num_chans;
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#define MAX_FP_CHANS 64
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gint chan_tf_size[MAX_FP_CHANS];
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gint chan_num_tbs[MAX_FP_CHANS];
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/* TODO: EDCH info */
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||||
};
|
||||
|
||||
|
|
@ -143,9 +143,8 @@ static void set_pseudo_header_info(wtap *wth,
|
|||
int pkt_encap,
|
||||
long file_offset,
|
||||
union wtap_pseudo_header *pseudo_header,
|
||||
gint length,
|
||||
packet_direction_t direction);
|
||||
static void set_aal_info(union wtap_pseudo_header *pseudo_header, gint length,
|
||||
static void set_aal_info(union wtap_pseudo_header *pseudo_header,
|
||||
packet_direction_t direction);
|
||||
static void set_isdn_info(union wtap_pseudo_header *pseudo_header,
|
||||
packet_direction_t direction);
|
||||
|
|
@ -395,7 +394,7 @@ gboolean catapult_dct2000_read(wtap *wth, int *err, gchar **err_info _U_,
|
|||
|
||||
/* Set pseudo-header if necessary */
|
||||
set_pseudo_header_info(wth, encap, this_offset, &wth->pseudo_header,
|
||||
data_chars/2, direction);
|
||||
direction);
|
||||
|
||||
/* OK, we have packet details to return */
|
||||
*err = errno;
|
||||
|
|
@ -468,7 +467,7 @@ catapult_dct2000_seek_read(wtap *wth, long seek_off,
|
|||
}
|
||||
|
||||
/* Set packet pseudo-header if necessary */
|
||||
set_pseudo_header_info(wth, encap, seek_off, pseudo_header, data_chars/2, direction);
|
||||
set_pseudo_header_info(wth, encap, seek_off, pseudo_header, direction);
|
||||
|
||||
*err = errno = 0;
|
||||
return TRUE;
|
||||
|
|
@ -1163,7 +1162,6 @@ void set_pseudo_header_info(wtap *wth,
|
|||
int pkt_encap,
|
||||
long file_offset,
|
||||
union wtap_pseudo_header *pseudo_header,
|
||||
gint length,
|
||||
packet_direction_t direction)
|
||||
{
|
||||
pseudo_header->dct2000.seek_off = file_offset;
|
||||
|
|
@ -1172,7 +1170,7 @@ void set_pseudo_header_info(wtap *wth,
|
|||
switch (pkt_encap)
|
||||
{
|
||||
case WTAP_ENCAP_ATM_PDUS_UNTRUNCATED:
|
||||
set_aal_info(pseudo_header, length, direction);
|
||||
set_aal_info(pseudo_header, direction);
|
||||
break;
|
||||
case WTAP_ENCAP_ISDN:
|
||||
set_isdn_info(pseudo_header, direction);
|
||||
|
|
@ -1191,8 +1189,7 @@ void set_pseudo_header_info(wtap *wth,
|
|||
/*********************************************/
|
||||
/* Fill in atm pseudo-header with known info */
|
||||
/*********************************************/
|
||||
void set_aal_info(union wtap_pseudo_header *pseudo_header, gint length,
|
||||
packet_direction_t direction)
|
||||
void set_aal_info(union wtap_pseudo_header *pseudo_header, packet_direction_t direction)
|
||||
{
|
||||
/* 'aal_head_chars' has this format (for AAL2 at least):
|
||||
Global Flow Control (4 bits) | VPI (8 bits) | VCI (16 bits) |
|
||||
|
|
@ -1212,7 +1209,7 @@ void set_aal_info(union wtap_pseudo_header *pseudo_header, gint length,
|
|||
/* Assume always AAL2 for FP */
|
||||
pseudo_header->dct2000.inner_pseudo_header.atm.aal = AAL_2;
|
||||
|
||||
pseudo_header->dct2000.inner_pseudo_header.atm.type = TRAF_UNKNOWN;
|
||||
pseudo_header->dct2000.inner_pseudo_header.atm.type = TRAF_UMTS_FP;
|
||||
pseudo_header->dct2000.inner_pseudo_header.atm.subtype = TRAF_ST_UNKNOWN;
|
||||
|
||||
/* vpi is 8 bits (2nd & 3rd nibble) */
|
||||
|
|
@ -1229,10 +1226,6 @@ void set_aal_info(union wtap_pseudo_header *pseudo_header, gint length,
|
|||
|
||||
/* 0 means we don't know how many cells the frame comprises. */
|
||||
pseudo_header->dct2000.inner_pseudo_header.atm.cells = 0;
|
||||
|
||||
pseudo_header->dct2000.inner_pseudo_header.atm.aal5t_u2u = 0;
|
||||
pseudo_header->dct2000.inner_pseudo_header.atm.aal5t_len = length;
|
||||
pseudo_header->dct2000.inner_pseudo_header.atm.aal5t_chksum = 0;
|
||||
}
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -318,6 +318,7 @@ struct isdn_phdr {
|
|||
#define TRAF_FR 5 /* Frame Relay */
|
||||
#define TRAF_SPANS 6 /* FORE SPANS */
|
||||
#define TRAF_IPSILON 7 /* Ipsilon */
|
||||
#define TRAF_UMTS_FP 8 /* UMTS Frame Protocol */
|
||||
|
||||
/*
|
||||
* Traffic subtypes.
|
||||
|
|
|
|||
Loading…
Reference in New Issue