static tvbuff_t *
handle_segment(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
               guint32 pkt_id, guint16 pkt_len, guint16 seg_off)
{
    fragment_head *frags;
    int offset;
    guint32 frag_data_len;
    gboolean more_frags;

    /* Skip fake TCP header after the first segment. */
    if (seg_off == 0) {
        offset = 0;
    } else {
        offset = STT_TCP_HDR_LEN;
        /* We saved the TCP header on the first packet (only), which skews the
         * segment offset. */
        seg_off += STT_TCP_HDR_LEN;
    }

    frag_data_len = tvb_reported_length_remaining(tvb, offset);
    more_frags = seg_off + frag_data_len < pkt_len;

    frags = fragment_add_check(&stt_reassembly_table, tvb, offset, pinfo,
                               pkt_id, NULL, seg_off, frag_data_len,
                               more_frags);

    /* Update reassembly fields in UI if reassembly is complete. */
    if (frags) {
        return process_reassembled_data(tvb, offset, pinfo, "Reassembled STT",
                                    frags, &frag_items, NULL, tree);
    }

    return NULL;
}

/** Handle a PFT packet which has the fragmentation header. This uses the
 * standard wireshark methods for reassembling fragments. If FEC is used,
 * the FEC is handled too. For the moment, all the fragments must be
 * available but this could be improved.
 *  \param[in,out] tvb The buffer containing the current fragment
 *  \param[in,out] pinfo The packet info structure
 *  \param[in,out] tree The structure containing the details which will be displayed, filtered, etc.
 *  \param[in] findex the fragment count
 *  \param[in] fcount the number of fragments
 *  \param[in] seq the sequence number of the reassembled packet
 *  \param[in] offset the offset into the tvb of the fragment
 *  \param[in] plen the length of each fragment
 *  \param[in] fec is fec used
 *  \param[in] rsk the number of useful bytes in each chunk
 *  \param[in] rsz the number of padding bytes in each chunk
 */
static tvbuff_t *
dissect_pft_fragmented(tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree,
  guint32 findex,
  guint32 fcount,
  guint16 seq,
  gint offset,
  guint16 plen,
  gboolean fec,
  guint16 rsk,
  guint16 rsz
)
{
  gboolean first, last;
  tvbuff_t *new_tvb=NULL;
  fragment_data *frag_edcp = NULL;
  pinfo->fragmented = TRUE;
  first = findex == 0;
  last = fcount == (findex+1);
  frag_edcp = fragment_add_seq_check (
    tvb, offset, pinfo,
    seq,
    dcp_fragment_table, dcp_reassembled_table,
    findex,
    plen,
    !last);
  if(fec) {
    new_tvb = dissect_pft_fec_detailed(
      tvb, pinfo, tree, findex, fcount, seq, offset, plen, fec, rsk, rsz, frag_edcp
      );
  } else {
    new_tvb = process_reassembled_data (tvb, offset, pinfo,
                                        "Reassembled DCP (ETSI)",
                                        frag_edcp, &dcp_frag_items,
                                        NULL, tree);
  }
  if (check_col (pinfo->cinfo, COL_INFO)) {
    if(new_tvb) {
      col_append_str (pinfo->cinfo, COL_INFO, " (Message Reassembled)");
    } else {
      if(last) {
        col_append_str (pinfo->cinfo, COL_INFO, " (Message Reassembly failure)");
      } else {
        col_append_fstr (pinfo->cinfo, COL_INFO, " (Message fragment %u)", findex);
      }
    }
    if(first)
      col_append_str (pinfo->cinfo, COL_INFO, " (first)");
    if(last)
      col_append_str (pinfo->cinfo, COL_INFO, " (last)");
  }
  return new_tvb;
}

tvbuff_t *stream_process_reassembled(
    tvbuff_t *tvb, int offset, packet_info *pinfo,
    const char *name, const stream_pdu_fragment_t *frag,
    const struct _fragment_items *fit,
    gboolean *update_col_infop, proto_tree *tree)
{
    stream_pdu_t *pdu;
    DISSECTOR_ASSERT(frag);
    pdu = frag->pdu;

    /* we handle non-terminal fragments ourselves, because
       reassemble.c messes them up */
    if(!frag->final_fragment) {
        if (pdu->fd_head != NULL && fit->hf_reassembled_in != NULL) {
            proto_tree_add_uint(tree,
                                *(fit->hf_reassembled_in), tvb,
                                0, 0, pdu->fd_head->reassembled_in);
        }
        return NULL;
    }

    return process_reassembled_data(tvb, offset, pinfo, name, pdu->fd_head,
                                    fit, update_col_infop, tree);
}

//.........这里部分代码省略.........
        break;
    }

    session_id = usb_conv_info->bus_id << 16 | usb_conv_info->device_address << 8 | ((pinfo->p2p_dir == P2P_DIR_RECV) ? 1 : 0 ) << 7 | usb_conv_info->endpoint;

    hci_data = (hci_data_t *) wmem_new(wmem_packet_scope(), hci_data_t);
    hci_data->interface_id = HCI_INTERFACE_USB;
    hci_data->adapter_id = usb_conv_info->bus_id << 8 | usb_conv_info->device_address;
    hci_data->chandle_to_bdaddr_table = chandle_to_bdaddr_table;
    hci_data->bdaddr_to_name_table = bdaddr_to_name_table;
    hci_data->localhost_bdaddr = localhost_bdaddr;
    hci_data->localhost_name = localhost_name;

    pinfo->ptype = PT_BLUETOOTH;

    next_tvb = tvb_new_subset_remaining(tvb, offset);
    if (!pinfo->fd->flags.visited && usb_conv_info->endpoint <= 0x02) {
        fragment_info_t  *fragment_info;

        fragment_info = (fragment_info_t *) wmem_tree_lookup32(fragment_info_table, session_id);
        if (fragment_info == NULL) {
            fragment_info = (fragment_info_t *) wmem_new(wmem_file_scope(), fragment_info_t);
            fragment_info->fragment_id = 0;
            fragment_info->remaining_length = 0;

            wmem_tree_insert32(fragment_info_table, session_id, fragment_info);
        }

        if (fragment_info->fragment_id == 0) {
            switch(usb_conv_info->endpoint)
            {
            case 0:
                fragment_info->remaining_length = tvb_get_guint8(tvb, offset + 2) + 3;
                break;
            case 1:
                fragment_info->remaining_length = tvb_get_guint8(tvb, offset + 1) + 2;
                break;
            case 2:
                fragment_info->remaining_length = tvb_get_letohs(tvb, offset + 2) + 4;
                break;
            }
        }

        fragment_info->remaining_length -= tvb_ensure_length_remaining(tvb, offset);

        fragment_add_seq_check(&hci_usb_reassembly_table,
                               tvb, offset, pinfo, session_id, NULL,
                               fragment_info->fragment_id, tvb_length_remaining(tvb, offset), (fragment_info->remaining_length == 0) ? FALSE : TRUE);
        if (fragment_info->remaining_length > 0)
            fragment_info->fragment_id += 1;
        else
            fragment_info->fragment_id = 0;
    }

    reassembled = fragment_get_reassembled_id(&hci_usb_reassembly_table, pinfo, session_id);
    if (reassembled && pinfo->fd->num < reassembled->reassembled_in) {
        pitem = proto_tree_add_item(ttree, hf_bthci_usb_packet_fragment, tvb, offset, -1, ENC_NA);
        PROTO_ITEM_SET_GENERATED(pitem);

        col_append_str(pinfo->cinfo, COL_INFO, " Fragment");
    } else if (reassembled && pinfo->fd->num == reassembled->reassembled_in) {
        pitem = proto_tree_add_item(ttree, hf_bthci_usb_packet_complete, tvb, offset, -1, ENC_NA);
        PROTO_ITEM_SET_GENERATED(pitem);

        if (reassembled->len > tvb_ensure_length_remaining(tvb, offset)) {
            next_tvb = process_reassembled_data(tvb, 0, pinfo,
                    "Reassembled HCI_USB",
                    reassembled, &hci_usb_msg_frag_items,
                    NULL, ttree);
        }

        switch(usb_conv_info->endpoint)
        {
        case 0:
            call_dissector_with_data(bthci_cmd_handle, next_tvb, pinfo, tree, hci_data);
            break;
        case 1:
            call_dissector_with_data(bthci_evt_handle, next_tvb, pinfo, tree, hci_data);
            break;
        case 2:
            call_dissector_with_data(bthci_acl_handle, next_tvb, pinfo, tree, hci_data);
            break;
        }
    } else {
        pitem = proto_tree_add_item(ttree, hf_bthci_usb_packet_unknown_fragment, tvb, offset, -1, ENC_NA);
        PROTO_ITEM_SET_GENERATED(pitem);
    }

    if (usb_conv_info->endpoint == 0x03) {
        call_dissector_with_data(bthci_sco_handle, next_tvb, pinfo, tree, hci_data);
    } else if (usb_conv_info->endpoint > 0x03) {
        proto_tree_add_item(ttree, hf_bthci_usb_data, tvb, offset, -1, ENC_NA);
    }

    offset += tvb_length_remaining(tvb, offset);

    pinfo->p2p_dir = p2p_dir_save;

    return offset;
}

//.........这里部分代码省略.........
				expert_add_info(pinfo, ti, &ei_ltp_sno_larger_than_ccsds);
			}
		} else {
			return 0;
		}

	} else if (ltp_type != 7) {
		more_frags = TRUE;

	}

	if (segment_size >= tvb_captured_length(tvb)) {
		/* did not capture the entire packet */
		proto_tree_add_string(ltp_data_tree, hf_ltp_partial_packet, tvb, 0, 0, "<increase capture size?>");
		return tvb_captured_length(tvb);
	}

	frag_msg = fragment_add_check(&ltp_reassembly_table,
					tvb, frame_offset, pinfo, (guint32)session_num, NULL,
					(guint32)data_offset, (guint32)data_length, more_frags);

	if(frag_msg)
	{
		/* Checking if the segment is completely reassembled */
		if(!(frag_msg->flags & FD_PARTIAL_REASSEMBLY))
		{
			/* if the segment has not been fragmented, then no reassembly is needed */
			if(!more_frags && data_offset == 0)
			{
				new_tvb = tvb_new_subset_remaining(tvb, frame_offset);
			}
			else
			{
				new_tvb = process_reassembled_data(tvb, frame_offset, pinfo, "Reassembled LTP Segment",
									frag_msg, &ltp_frag_items,NULL, ltp_data_tree);

			}
		}
	}

	if(new_tvb)
	{
		int data_count = 1;

		int parse_length;
		int parse_offset = 0;
		parse_length = tvb_captured_length(new_tvb);
		while(parse_offset < parse_length)
		{
			int bundle_size;
			int sda_header_size;
			proto_tree *ltp_data_data_tree;
			tvbuff_t *datatvb;
			ltp_data_data_tree = proto_tree_add_subtree_format(ltp_data_tree, tvb,frame_offset, 0,
										ett_data_data_segm, NULL, "Data[%d]",data_count);

			sda_header_size = 0;
			if (client_id == 2) {
				sdnv_status = evaluate_sdnv64(tvb, frame_offset+parse_offset, &sdnv_length, &sda_client_id);
				ti = proto_tree_add_uint64_format_value(ltp_data_data_tree, hf_ltp_data_sda_clid, tvb, frame_offset+parse_offset, sdnv_length, sda_client_id,
									"%" G_GINT64_MODIFIER "u (%s)", sda_client_id, val_to_str_const((const guint32) sda_client_id, client_service_id_info, "Invalid"));

				if (!sdnv_status) {
					expert_add_info(pinfo, ti, &ei_ltp_sdnv_length);
					return 0;
				}

static void
dissect_lapdm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
    proto_tree *lapdm_tree, *addr_tree, *length_tree;
    proto_item *lapdm_ti, *addr_ti, *length_ti;
    guint8 addr, length, cr, sapi, len/*, n_s*/;
    int control;
    gboolean m;
    tvbuff_t *payload;
    int available_length;
    gboolean is_response = FALSE;

    /* Check that there's enough data */
    if (tvb_length(tvb) < LAPDM_HEADER_LEN)
        return;

    col_set_str(pinfo->cinfo, COL_PROTOCOL, "LAPDm");

    addr = tvb_get_guint8(tvb, 0);
    length = tvb_get_guint8(tvb, 2);

    cr = addr & LAPDM_CR;
    if (pinfo->p2p_dir == P2P_DIR_RECV) {
        is_response = cr ? FALSE : TRUE;
    }
    else if (pinfo->p2p_dir == P2P_DIR_SENT) {
        is_response = cr ? TRUE : FALSE;
    }

    if (tree) {
        lapdm_ti = proto_tree_add_item(tree, proto_lapdm, tvb, 0, LAPDM_HEADER_LEN, ENC_NA);
        lapdm_tree = proto_item_add_subtree(lapdm_ti, ett_lapdm);

        addr_ti = proto_tree_add_uint(lapdm_tree, hf_lapdm_address, tvb, 0, 1, addr);
        addr_tree = proto_item_add_subtree(addr_ti, ett_lapdm_address);

        proto_tree_add_uint(addr_tree, hf_lapdm_lpd, tvb, 0, 1, addr);
        proto_tree_add_uint(addr_tree, hf_lapdm_sapi, tvb, 0, 1, addr);
        proto_tree_add_uint(addr_tree, hf_lapdm_cr, tvb, 0, 1, addr);
        proto_tree_add_uint(addr_tree, hf_lapdm_ea, tvb, 0, 1, addr);
    }
    else {
        lapdm_ti = NULL;
        lapdm_tree = NULL;
    }

    control = dissect_xdlc_control(tvb, 1, pinfo, lapdm_tree, hf_lapdm_control,
              ett_lapdm_control, &lapdm_cf_items, NULL /* LAPDm doesnt support extended */, NULL, NULL,
              is_response, FALSE, FALSE);

    if (tree) {
        length_ti = proto_tree_add_uint(lapdm_tree, hf_lapdm_length, tvb,
                    2, 1, length);
        length_tree = proto_item_add_subtree(length_ti, ett_lapdm_length);

        proto_tree_add_uint(length_tree, hf_lapdm_len, tvb, 2, 1, length);
        proto_tree_add_uint(length_tree, hf_lapdm_m, tvb, 2, 1, length);
        proto_tree_add_uint(length_tree, hf_lapdm_el, tvb, 2, 1, length);
    }

    sapi = (addr & LAPDM_SAPI) >> LAPDM_SAPI_SHIFT;
    len = (length & LAPDM_LEN) >> LAPDM_LEN_SHIFT;
    /*n_s = (control & XDLC_N_S_MASK) >> XDLC_N_S_SHIFT;*/
    m = (length & LAPDM_M) >> LAPDM_M_SHIFT;
    available_length = tvb_length(tvb) - LAPDM_HEADER_LEN;

    /* No point in doing anything if no payload
     */
    if( !MIN(len, available_length) )
        return;

    payload = tvb_new_subset(tvb, LAPDM_HEADER_LEN, MIN(len,available_length), -1);

    /* Potentially segmented I frame
     */
    if( (control & XDLC_I_MASK) == XDLC_I && reassemble_lapdm )
    {
            fragment_data *fd_m = NULL;
            tvbuff_t *reassembled = NULL;
            guint32 fragment_id;
            gboolean save_fragmented = pinfo->fragmented;

            pinfo->fragmented = m;

            /* Rely on caller to provide a way to group fragments */
            fragment_id = (pinfo->circuit_id << 4) | (sapi << 1) | pinfo->p2p_dir;

            /* This doesn't seem the best way of doing it as doesn't
               take N(S) into account, but N(S) isn't always 0 for
               the first fragment!
             */
            fd_m = fragment_add_seq_next (payload, 0, pinfo,
                                fragment_id, /* guint32 ID for fragments belonging together */
                                lapdm_fragment_table, /* list of message fragments */
                                lapdm_reassembled_table, /* list of reassembled messages */
                                /*n_s guint32 fragment sequence number */
                                len, /* guint32 fragment length */
                                m); /* More fragments? */

            reassembled = process_reassembled_data(payload, 0, pinfo,
//.........这里部分代码省略.........

/*
 * Dissect a standard (reliable) ts2 packet, reassembling if required.
 */
static void ts2_standard_dissect(tvbuff_t *tvb, packet_info *pinfo, proto_tree *ts2_tree, ts2_conversation *conversation_data)
{
    guint8 save_fragmented;
    tvbuff_t *new_tvb, *next_tvb;
    fragment_data *frag_msg ;
    guint16 fragment_number;
    ts2_frag *frag;
    gboolean outoforder;

    guint16 type = tvb_get_letohs(tvb, 2);
    /*guint16 class = tvb_get_letohs(tvb, 0);*/
    proto_tree_add_item(ts2_tree, hf_ts2_seqnum, tvb, 12, 4, TRUE);

    /* XXX: Following fragmentation stuff should be separate from the GUI stuff ??    */
    /* Get our stored fragmentation data or create one! */
    if ( ! ( frag = p_get_proto_data(pinfo->fd, proto_ts2) ) ) {
        frag = se_alloc(sizeof(ts2_frag));
        frag->frag_num=0;
    }

    /* decide if the packet is server to client or client to server
     * then check its fragmentation
     */
    if(!(pinfo->fd->flags.visited))
    {
        if(conversation_data->server_port == pinfo->srcport)
        {
            frag->fragmented = ts2_standard_find_fragments(tvb, &conversation_data->last_inorder_server_frame, &conversation_data->server_frag_size, &conversation_data->server_frag_num, &outoforder);
            frag->frag_num=conversation_data->server_frag_num;
            frag->frag_size=conversation_data->server_frag_size;
        }
        else
        {

            frag->fragmented = ts2_standard_find_fragments(tvb, &conversation_data->last_inorder_client_frame, &conversation_data->client_frag_size, &conversation_data->client_frag_num, &outoforder);
            frag->frag_num=conversation_data->client_frag_num;
            frag->frag_size=conversation_data->client_frag_size;
        }
        frag->outoforder=outoforder;
        p_add_proto_data(pinfo->fd, proto_ts2, frag);
    }

    /* Get our stored fragmentation data */
    frag = p_get_proto_data(pinfo->fd, proto_ts2);

    proto_tree_add_item(ts2_tree, hf_ts2_resend_count, tvb, 16, 2, TRUE);
    proto_tree_add_item(ts2_tree, hf_ts2_fragmentnumber, tvb, 18, 2, TRUE);
    ts2_add_checked_crc32(ts2_tree, hf_ts2_crc32, tvb, 20, tvb_get_letohl(tvb, 20));

    /* Reassemble the packet if its fragmented */
    new_tvb = NULL;
    if(frag->fragmented)
    {
        save_fragmented = pinfo->fragmented;
        frag_msg = NULL;
        pinfo->fragmented = TRUE;
        fragment_number = tvb_get_letohs(tvb, 18);
        frag_msg = fragment_add_seq_check(tvb, 24, pinfo, type,	msg_fragment_table, msg_reassembled_table, frag->frag_num, tvb_length_remaining(tvb, 24), fragment_number);
        new_tvb = process_reassembled_data(tvb, 24, pinfo,"Reassembled Message", frag_msg, &msg_frag_items, NULL, ts2_tree);
        if (frag_msg)
        {   /* Reassembled */
            if (check_col(pinfo->cinfo, COL_INFO)) col_append_str(pinfo->cinfo, COL_INFO, " (Message Reassembled)");
        }
        else
        {   /* Not last packet of reassembled Short Message */
            if (check_col(pinfo->cinfo, COL_INFO))col_append_fstr(pinfo->cinfo, COL_INFO," (Message fragment %u)", frag->frag_num);
        }
        if (new_tvb)
            next_tvb = new_tvb;
        else
            next_tvb = tvb_new_subset_remaining(tvb, 24);
        pinfo->fragmented = save_fragmented;
    }
    else
        next_tvb = tvb_new_subset_remaining(tvb, 24);

    /* If we have a full packet now dissect it */
    if((new_tvb || !frag->fragmented) && !frag->outoforder)
    {
        switch(type)
        {
        case TS2T_LOGINPART2:
            ts2_parse_loginpart2(next_tvb, ts2_tree);
            break;
        case TS2T_CHANNELLIST:
            ts2_parse_channellist(next_tvb, ts2_tree);
            break;
        case TS2T_PLAYERLIST:
            ts2_parse_playerlist(next_tvb, ts2_tree);
            break;
        case TS2T_NEWPLAYERJOINED:
            ts2_parse_newplayerjoined(next_tvb, ts2_tree);
            break;
        case TS2T_KNOWNPLAYERUPDATE:
            ts2_parse_knownplayerupdate(next_tvb, ts2_tree);
            break;
        case TS2T_PLAYERLEFT:
//.........这里部分代码省略.........

static void
dissect_wai(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
/* Format of WAPI protocol packet in WAI authentication system

0      2      3         4         6         8        10        11      12
-------------------------------------------------------------------------------
| Ver. | Type | Subtype | Reserved | Length | packet  |  fragm. | flag | data |
|                                           | seq. no | seq. no |             |
|-----------------------------------------------------------------------------|
Figure 18 from [ref:1]
*/
#define WAI_MESSAGE_LENGTH 12   /*Length of all fields without 'Data' field*/
#define WAI_DATA_OFFSET    WAI_MESSAGE_LENGTH
    guint16        version;
    guint8         subtype;
    guint16        length;
    guint16        packet_num;
    guint8         fragment_num;
    guint8         flags;
    fragment_head *frag_msg;
    proto_tree    *wai_tree     = NULL;
    tvbuff_t      *next_tvb;
    tvbuff_t      *new_tvb;
    const gchar   *subtype_name = "Unknown type";

    length = tvb_get_ntohs(tvb, 6)-WAI_MESSAGE_LENGTH;
    subtype = tvb_get_guint8(tvb, 3);

    /* quick sanity check */
    if ((length != tvb_reported_length (tvb)-WAI_MESSAGE_LENGTH) ||
        (subtype > WAI_SUB_MULTICAST_ANNOUNCE_RESP)) {
        return;
    }

    col_set_str(pinfo->cinfo, COL_PROTOCOL, "WAI");
    col_clear(pinfo->cinfo, COL_INFO);
    version = tvb_get_ntohs(tvb, 0);

    if (version == 1) {
        subtype_name = val_to_str_ext_const(subtype, &wai_subtype_names_ext, "Unknown type");
    }
    col_append_fstr(pinfo->cinfo, COL_INFO, "%s", subtype_name);

    /* Field lengths and offsets in WAI protocol described above */
    packet_num   = tvb_get_ntohs(tvb, 8);
    fragment_num = tvb_get_guint8(tvb, 10);
    flags        = tvb_get_guint8(tvb, 11);

    if (tree) {
        proto_item *wai_item;

        wai_item = proto_tree_add_item(tree, proto_wai, tvb, 0, -1, ENC_NA);

        proto_item_set_text (wai_item, "WAI Protocol (%s)",
                                val_to_str_ext_const(subtype, &wai_subtype_names_ext, "Unknown type"));
        wai_tree = proto_item_add_subtree(wai_item, ett_wai);

        /* Field lengths and offsets in WAI protocol described above */
        proto_tree_add_item(wai_tree, hf_wai_version,   tvb, 0,  2, ENC_BIG_ENDIAN);
        proto_tree_add_item(wai_tree, hf_wai_type,      tvb, 2,  1, ENC_BIG_ENDIAN);
        proto_tree_add_item(wai_tree, hf_wai_subtype,   tvb, 3,  1, ENC_BIG_ENDIAN);
        proto_tree_add_item(wai_tree, hf_wai_reserved,  tvb, 4,  2, ENC_BIG_ENDIAN);
        proto_tree_add_item(wai_tree, hf_wai_length,    tvb, 6,  2, ENC_BIG_ENDIAN);
        proto_tree_add_item(wai_tree, hf_wai_seq,       tvb, 8,  2, ENC_BIG_ENDIAN);
        proto_tree_add_item(wai_tree, hf_wai_fragm_seq, tvb, 10, 1, ENC_BIG_ENDIAN);
        proto_tree_add_item(wai_tree, hf_wai_flag,      tvb, 11, 1, ENC_BIG_ENDIAN);
    }

    frag_msg =  fragment_add_seq_check (&wai_reassembly_table,
                                        tvb, WAI_DATA_OFFSET,
                                        pinfo,
                                        packet_num,
                                        NULL,
                                        fragment_num,
                                        length,
                                        flags);

    next_tvb = tvb_new_subset_remaining(tvb, WAI_DATA_OFFSET);

    /* Replace INFO column if message is fragmented and call data_handle */
    if (flags) {
        col_add_fstr(pinfo->cinfo, COL_INFO,
                     "Fragment (%d) of message, data not dissected", fragment_num);

        process_reassembled_data(tvb, WAI_DATA_OFFSET, pinfo,
                                 "Reassembled WAI", frag_msg, &wai_frag_items,
                                 NULL, wai_tree);

        call_dissector(data_handle, next_tvb, pinfo, tree);
    } else {
        /* If this is the last fragment of fragmented message, then reassamble and dissect
           otherwise only dissect */
        if (fragment_num > 0) {
            new_tvb = process_reassembled_data(tvb, WAI_DATA_OFFSET, pinfo,
                                               "Reassembled WAI", frag_msg, &wai_frag_items,
                                               NULL, wai_tree);

            if (new_tvb) {
                col_set_str(pinfo->cinfo, COL_INFO, "Last fragment of message, data dissected");
//.........这里部分代码省略.........

static void
dissect_smb_direct_payload(tvbuff_t *tvb, packet_info *pinfo,
			   proto_tree *tree, guint32 remaining_length)
{
	gboolean save_fragmented = pinfo->fragmented;
	int save_visited = pinfo->fd->flags.visited;
	conversation_t *conversation = NULL;
	fragment_head *fd_head = NULL;
	tvbuff_t *payload_tvb = NULL;
	gboolean more_frags = FALSE;
	gboolean fd_head_not_cached = FALSE;
	heur_dtbl_entry_t *hdtbl_entry;

	if (!smb_direct_reassemble) {
		payload_tvb = tvb;
		goto dissect_payload;
	}

	conversation = find_or_create_conversation(pinfo);

	if (remaining_length > 0) {
		more_frags = TRUE;
	}

	fd_head = (fragment_head *)p_get_proto_data(wmem_file_scope(), pinfo, proto_smb_direct, 0);
	if (fd_head == NULL) {
		fd_head_not_cached = TRUE;

		pinfo->fd->flags.visited = 0;
		fd_head = fragment_add_seq_next(&smb_direct_reassembly_table,
						tvb, 0, pinfo,
						conversation->index,
						NULL, tvb_captured_length(tvb),
						more_frags);
	}

	if (fd_head == NULL) {
		/*
		 * We really want the fd_head and pass it to
		 * process_reassembled_data()
		 *
		 * So that individual fragments gets the
		 * reassembled in field.
		 */
		fd_head = fragment_get_reassembled_id(&smb_direct_reassembly_table,
						      pinfo,
						      conversation->index);
	}

	if (fd_head == NULL) {
		/*
		 * we need more data...
		 */
		goto done;
	}

	if (fd_head_not_cached) {
		p_add_proto_data(wmem_file_scope(), pinfo,
				 proto_smb_direct, 0, fd_head);
	}

	payload_tvb = process_reassembled_data(tvb, 0, pinfo,
					       "Reassembled SMB Direct",
					       fd_head,
					       &smb_direct_frag_items,
					       NULL, /* update_col_info*/
					       tree);
	if (payload_tvb == NULL) {
		/*
		 * we need more data...
		 */
		goto done;
	}

dissect_payload:
	pinfo->fragmented = FALSE;
	if (!dissector_try_heuristic(smb_direct_heur_subdissector_list,
				     payload_tvb, pinfo, tree, &hdtbl_entry, NULL)) {
		call_dissector(data_handle, payload_tvb, pinfo, tree);
	}
done:
	pinfo->fragmented = save_fragmented;
	pinfo->fd->flags.visited = save_visited;
	return;
}

//.........这里部分代码省略.........
        total_length = tvb_get_ntohs(tvb, offset + 4);
        ti_tot_len = proto_tree_add_text(clnp_tree, tvb, offset + 4 , 2,
                "Total length        : %6u",
                total_length);
        if (total_length < segment_length) {
            /* Reassembled length is less than the length of this segment. */
            expert_add_info_format(pinfo, ti_tot_len, &ei_clnp_length,
                    "Total length < segment length %u", segment_length);
            return;
        }
        offset  += SEGMENTATION_PART_LEN;
        opt_len -= SEGMENTATION_PART_LEN;
    }

    dissect_osi_options(opt_len, tvb, offset, clnp_tree);

    offset += opt_len;

    /* If clnp_reassemble is on, this is a segment, we have all the
     * data in the segment, and the checksum is valid, then just add the
     * segment to the hashtable.
     */
    save_fragmented = pinfo->fragmented;
    if (clnp_reassemble && (cnf_type & CNF_SEG_OK) &&
            ((cnf_type & CNF_MORE_SEGS) || segment_offset != 0) &&
            tvb_bytes_exist(tvb, offset, segment_length - cnf_hdr_len) &&
            segment_length > cnf_hdr_len &&
            cksum_status != CKSUM_NOT_OK) {
        fd_head = fragment_add_check(&clnp_reassembly_table,
                tvb, offset, pinfo, du_id, NULL,
                segment_offset, segment_length - cnf_hdr_len,
                cnf_type & CNF_MORE_SEGS);

        next_tvb = process_reassembled_data(tvb, offset, pinfo, "Reassembled CLNP",
                fd_head, &clnp_frag_items, &update_col_info, clnp_tree);
    } else {
        /* If this is the first segment, dissect its contents, otherwise
           just show it as a segment.

           XXX - if we eventually don't save the reassembled contents of all
           segmented datagrams, we may want to always reassemble. */
        if ((cnf_type & CNF_SEG_OK) && segment_offset != 0) {
            /* Not the first segment - don't dissect it. */
            next_tvb = NULL;
        } else {
            /* First segment, or not segmented.  Dissect what we have here. */

            /* Get a tvbuff for the payload.  Set its length to the segment
               length, and flag it as a fragment, so going past the end
               reports FragmentBoundsError, i.e. "there's data missing
               because this isn't reassembled", not ReportedBoundsError,
               i.e. "the dissector ran past the end of the packet, so the
               packet must not have been constructed properly". */
            next_tvb = tvb_new_subset_length(tvb, offset, segment_length - cnf_hdr_len);
            tvb_set_fragment(next_tvb);

            /*
             * If this is the first segment, but not the only segment,
             * tell the next protocol that.
             */
            if ((cnf_type & (CNF_SEG_OK|CNF_MORE_SEGS)) == (CNF_SEG_OK|CNF_MORE_SEGS))
                pinfo->fragmented = TRUE;
            else
                pinfo->fragmented = FALSE;
        }
    }

//.........这里部分代码省略.........
      }
    }

    /* if we have a P_CONTROL packet */
    if (openvpn_opcode != P_ACK_V1) {
      /* read Message Packet-ID */
      if (tvb_length_remaining(tvb, offset) >= 4) {
        msg_mpid = tvb_get_bits32(tvb, offset*8, 32, ENC_BIG_ENDIAN);
        proto_tree_add_item(openvpn_tree, hf_openvpn_mpid, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;
      }
    }
  }

  /* if we have more data left, determine what to do */
  msg_length_remaining = tvb_length_remaining(tvb, offset);

  if (msg_length_remaining == 0) {
    return tvb_length(tvb);
  }

  if (openvpn_opcode != P_CONTROL_V1) {
    proto_tree *data_tree;
    data_tree = proto_tree_add_subtree_format(openvpn_tree, tvb, offset, -1,
                              ett_openvpn_data, NULL, "Data (%d bytes)",
                              tvb_length_remaining(tvb, offset));

    proto_tree_add_item(data_tree, hf_openvpn_data, tvb, offset, -1, ENC_NA);
    return tvb_length(tvb);
  }

  /* Try to reassemble */

  /* an ordinary openvpn control packet contains 100 bytes only if it is part of a
     fragmented message and is not the last fragment of the current transmission.
     Note that the tvb contains exactly one openvpn PDU:
     UDP: by definition;
     TCP: because of the use of tcp_dissect_pdus().
  */
  if (msg_length_remaining == 100) {
    msg_lastframe = FALSE;
  } else {
    msg_lastframe = TRUE;
  }

  save_fragmented = pinfo->fragmented;
  pinfo->fragmented = TRUE;

  frag_msg = fragment_add_seq_next(
    &msg_reassembly_table,
    tvb,
    offset,
    pinfo,
    msg_sessionid,         /* ID for fragments belonging together */
    NULL,
    msg_length_remaining,  /* fragment length - to the end        */
    !(msg_lastframe));     /* More fragments ?                    */

  /* show "data" fragment on tree unless "reassembled" message has just one part.       */
  /* i.e., show if ("not reassembled") or ("reassembled" and "has multiple fragments")  */
  if ((frag_msg == NULL) || (frag_msg->next != NULL)) {
    proto_tree *data_tree;
    data_tree = proto_tree_add_subtree_format(openvpn_tree, tvb, offset, -1,
                              ett_openvpn_data, NULL, "Message fragment (%d bytes)",
                              tvb_length_remaining(tvb, offset));

    proto_tree_add_item(data_tree, hf_openvpn_fragment_bytes, tvb, offset, -1, ENC_NA);
    }

  new_tvb = NULL;
  if (frag_msg) {
    if (msg_lastframe) { /* Reassembled */
      new_tvb = process_reassembled_data(tvb, offset, pinfo, "Reassembled Message",
                                         frag_msg, &openvpn_frag_items, NULL, openvpn_tree);
      if (frag_msg->next != NULL) { /* multiple frags ? */
        col_append_str(pinfo->cinfo, COL_INFO, " (Message Reassembled "); /* overwritten by next dissector */
      }

    } else { /* Not last packet of reassembled Short Message */
      col_append_fstr(pinfo->cinfo, COL_INFO, " (Message fragment %d) ", msg_mpid);
      if (pinfo->fd->num != frag_msg->reassembled_in) {
        /* Add a "Reassembled in" link if not reassembled in this frame */
        proto_tree_add_uint(openvpn_tree, hf_openvpn_reassembled_in,
                            tvb, 0, 0, frag_msg->reassembled_in);
      }
    }
  } /* if (frag_msg) */

  pinfo->fragmented = save_fragmented;

  /* Now see if we need to call subdissector.
     new_tvb is non-null if we "reassembled* a message (even just one fragment) */

  if (new_tvb) {
    /* call SSL/TLS dissector if we just processed the last fragment */
    call_dissector(ssl_handle, new_tvb, pinfo, parent_tree);
  }

  return tvb_length(tvb);
}

//.........这里部分代码省略.........
                   length_remaining, plurality (length_remaining, "", "s"));
    }
    else
      col_add_fstr(pinfo->cinfo, COL_INFO, "%s: %s", is_request ? "C" : "S",
                   format_text(line, linelen));
  }

  ti = proto_tree_add_item(tree, proto_pop, tvb, offset, -1, FALSE);
  pop_tree = proto_item_add_subtree(ti, ett_pop);

  if (is_continuation) {

    if (pop_data_desegment) {

      if (!frame_data_p) {

        data_val->msg_read_len += tvb_length(tvb);

        frame_data_p = se_alloc(sizeof(struct pop_proto_data));

        frame_data_p->conversation_id = conversation->index;
        frame_data_p->more_frags = data_val->msg_read_len < data_val->msg_tot_len;

        p_add_proto_data(pinfo->fd, proto_pop, frame_data_p);  
      }

      frag_msg = fragment_add_seq_next(tvb, 0, pinfo, 
                                       frame_data_p->conversation_id, 
                                       pop_data_segment_table, 
                                       pop_data_reassembled_table, 
                                       tvb_length(tvb), 
                                       frame_data_p->more_frags);

      next_tvb = process_reassembled_data(tvb, offset, pinfo, 
                                          "Reassembled DATA",
                                          frag_msg, &pop_data_frag_items, 
                                          NULL, pop_tree);

      if (next_tvb) {

        if (imf_handle)
          call_dissector(imf_handle, next_tvb, pinfo, tree);

        if (data_val) {
          /* we have read everything - reset */
          
          data_val->msg_read_len = 0;
          data_val->msg_tot_len = 0; 
        }
        pinfo->fragmented = FALSE;
      } else {
        pinfo->fragmented = TRUE;
      }

    } else {

      /*
       * Put the whole packet into the tree as data.
       */
      call_dissector(data_handle,tvb, pinfo, pop_tree);
    
    }
    return;
  }

  /*

//.........这里部分代码省略.........
          cmdlen = linelen;
        hidden_item = proto_tree_add_boolean(smtp_tree, hf_smtp_req, tvb,
                                             0, 0, TRUE);
        PROTO_ITEM_SET_HIDDEN(hidden_item);

        /*
         * Put the command line into the protocol tree.
         */
        ti =  proto_tree_add_item(smtp_tree, hf_smtp_command_line, tvb,
                          loffset, next_offset - loffset, ENC_ASCII|ENC_NA);
        cmdresp_tree = proto_item_add_subtree(ti, ett_smtp_cmdresp);

        proto_tree_add_item(cmdresp_tree, hf_smtp_req_command, tvb,
                            loffset, cmdlen, ENC_ASCII|ENC_NA);
        if (linelen > 5) {
          proto_tree_add_item(cmdresp_tree, hf_smtp_req_parameter, tvb,
                              loffset + 5, linelen - 5, ENC_ASCII|ENC_NA);
        }

        if (smtp_data_desegment && !spd_frame_data->more_frags) {
          /* terminate the desegmentation */
          frag_msg = fragment_end_seq_next (pinfo, spd_frame_data->conversation_id, smtp_data_segment_table,
                                            smtp_data_reassembled_table);
        }

        /*
         * Step past this line.
         */
        loffset = next_offset;
      }
    }

    if (smtp_data_desegment) {
      next_tvb = process_reassembled_data(tvb, offset, pinfo, "Reassembled SMTP",
                                          frag_msg, &smtp_data_frag_items, NULL, smtp_tree);
      if (next_tvb) {
        /* XXX: this is presumptious - we may have negotiated something else */
        if (imf_handle) {
          call_dissector(imf_handle, next_tvb, pinfo, tree);
        } else {
          /*
           * Message body.
           * Put its lines into the protocol tree, a line at a time.
           */
          dissect_smtp_data(tvb, offset, smtp_tree);
        }

        pinfo->fragmented = FALSE;
      } else {
        pinfo->fragmented = TRUE;
      }
    }
  } else {
    /*
     * Process the response, a line at a time, until we hit a line
     * that doesn't have a continuation indication on it.
     */
    if (tree) {
      hidden_item = proto_tree_add_boolean(smtp_tree, hf_smtp_rsp, tvb,
                                           0, 0, TRUE);
      PROTO_ITEM_SET_HIDDEN(hidden_item);
    }

    while (tvb_offset_exists(tvb, offset)) {
      /*
       * Find the end of the line.

static void
dissect_gsm_cell_broadcast(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
   guint8 sms_encoding, total_pages, current_page;
   guint32       offset = 0;
   guint         len, text_len;
   guint32       msg_key;
   proto_item    *cbs_page_item = NULL;
   proto_tree    *cbs_page_tree = NULL;
   guint16       serial_number, message_id;
   tvbuff_t      *cbs_page_tvb = NULL;
   tvbuff_t      *cbs_msg_tvb = NULL;
   fragment_head * frag_data = NULL;

   len = tvb_length(tvb);

   col_append_str(pinfo->cinfo, COL_PROTOCOL, " Cell Broadcast");
   col_append_str(pinfo->cinfo, COL_INFO, " (CBS Page)");

   cbs_page_item = proto_tree_add_protocol_format(proto_tree_get_root(tree), proto_cell_broadcast, tvb, 0, len, "GSM Cell Broadcast");
   cbs_page_tree = proto_item_add_subtree(cbs_page_item, ett_gsm_cbs_page);

   serial_number = tvb_get_ntohs(tvb, offset);
   offset = dissect_cbs_serial_number(tvb, cbs_page_tree, offset);
   message_id = tvb_get_ntohs(tvb, offset);
   offset = dissect_cbs_message_identifier(tvb, cbs_page_tree, offset);
   sms_encoding = dissect_cbs_data_coding_scheme(tvb, pinfo, cbs_page_tree, offset++);
   total_pages = tvb_get_guint8(tvb, offset);
   current_page = (total_pages & 0xF0) >> 4;
   total_pages &= 0x0F;
   proto_tree_add_item(cbs_page_tree, hf_gsm_cbs_current_page, tvb, offset, 1, ENC_BIG_ENDIAN);
   proto_tree_add_item(cbs_page_tree, hf_gsm_cbs_total_pages, tvb, offset++, 1, ENC_BIG_ENDIAN);
   cbs_page_tvb = dissect_cbs_data(sms_encoding, tvb, cbs_page_tree, pinfo, offset );

   if (cbs_page_tvb != NULL)
   {
      text_len = tvb_length(cbs_page_tvb);
      while (text_len && (tvb_get_guint8(cbs_page_tvb, text_len-1) == '\r')) {
         text_len--;
      }
      if (tree != NULL)
      {
         proto_tree *cbs_page_subtree = proto_tree_add_subtree(cbs_page_tree, tvb, offset, -1,
                                        ett_gsm_cbs_page_content, NULL, "Cell Broadcast Page Contents");
         len = tvb_length(cbs_page_tvb);
         proto_tree_add_string(cbs_page_subtree, hf_gsm_cbs_page_content, cbs_page_tvb, 0,
                               text_len, tvb_get_string_enc(wmem_packet_scope(), cbs_page_tvb, 0, text_len, ENC_ASCII));
         len -= text_len;
         if (len)
         {
            proto_tree_add_string(cbs_page_subtree, hf_gsm_cbs_page_content_padding, cbs_page_tvb, text_len, len,
                                  tvb_get_string_enc(wmem_packet_scope(), cbs_page_tvb, text_len, len, ENC_ASCII));
         }
      }
      if (text_len)
      {
         cbs_page_tvb = tvb_new_subset_length(cbs_page_tvb, 0, text_len);
         if (total_pages == 1)
         {
            /* no need for reassembly */
            cbs_msg_tvb = cbs_page_tvb;
         }
         else
         {
             /* now we have a complete page, try to concatenate the full message */
            /* we can use the serial number and message ID as keys, as they are the same for all pages of a message */
            msg_key = (serial_number << 16) + message_id;
            frag_data = fragment_add_seq_check(&gsm_cbs_reassembly_table,
                                               cbs_page_tvb, 0, pinfo, msg_key, NULL,
                                               (current_page -1), text_len,
                                               (current_page!=total_pages));
            cbs_msg_tvb = process_reassembled_data(cbs_page_tvb, 0, pinfo, "Reassembled Cell Broadcast message",
                                                frag_data, &gsm_page_items, NULL, cbs_page_tree);
         }
      }
   }
   if (cbs_msg_tvb != NULL)
   {
      proto_item     *cbs_msg_item = NULL;
      proto_tree    *cbs_msg_tree = NULL;

      len = tvb_length(cbs_msg_tvb);
      col_append_str(pinfo->cinfo, COL_INFO, " (CBS Message)");

      cbs_msg_item = proto_tree_add_protocol_format(proto_tree_get_root(tree), proto_cell_broadcast, cbs_msg_tvb, 0, len, "GSM Cell Broadcast Message");
      cbs_msg_tree = proto_item_add_subtree(cbs_msg_item, ett_cbs_msg);

      proto_tree_add_string(cbs_msg_tree, hf_gsm_cbs_message_content, cbs_msg_tvb, 0, len, tvb_get_string_enc(wmem_packet_scope(), cbs_msg_tvb, 0, len, ENC_ASCII));
   }
}

static tvbuff_t *
dissect_pft_fec_detailed(tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree,
  guint32 findex,
  guint32 fcount,
  guint16 seq,
  gint offset,
  guint16 plen,
  gboolean fec _U_,
  guint16 rsk,
  guint16 rsz,
  fragment_data *fdx
)
{
  guint16 decoded_size;
  guint32 c_max;
  guint32 rx_min;
  gboolean first, last;
  tvbuff_t *new_tvb=NULL;

  if (fcount > MAX_FRAGMENTS) {
    if (tree)
      proto_tree_add_text(tree, tvb , 0, -1, "[Reassembly of %d fragments not attempted]", fcount);
    return NULL;
  }

  first = findex == 0;
  last = fcount == (findex+1);
  decoded_size = fcount*plen;
  c_max = fcount*plen/(rsk+PFT_RS_P);  /* rounded down */
  rx_min = c_max*rsk/plen;
  if(rx_min*plen<c_max*rsk)
    rx_min++;
  if (fdx)
    new_tvb = process_reassembled_data (tvb, offset, pinfo,
                                        "Reassembled DCP (ETSI)",
                                        fdx, &dcp_frag_items,
                                        NULL, tree);
  else {
    guint fragments=0;
    guint32 *got;
    fragment_data *fd;
    fragment_data *fd_head;

    if(tree)
      proto_tree_add_text (tree, tvb, 0, -1, "want %d, got %d need %d",
                           fcount, fragments, rx_min
        );
    got = ep_all