void dissect_umts_cell_broadcast_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint8 sms_encoding;
guint32 offset = 0;
guint32 len;
proto_item *cbs_item;
proto_tree *cbs_tree, *cbs_subtree;
guint msg_len;
guint8 *msg;
tvbuff_t * cbs_msg_tvb = NULL;
len = tvb_length(tvb);
col_append_str(pinfo->cinfo, COL_PROTOCOL, " Cell Broadcast");
col_append_str(pinfo->cinfo, COL_INFO, " (CBS Message)");
cbs_item = proto_tree_add_protocol_format(proto_tree_get_root(tree), proto_cell_broadcast, tvb, 0, len, "Cell Broadcast");
cbs_tree = proto_item_add_subtree(cbs_item, ett_cbs_msg);
sms_encoding = dissect_cbs_data_coding_scheme(tvb, pinfo, cbs_tree, 0);
offset++;
cbs_msg_tvb = dissect_cbs_data(sms_encoding, tvb, cbs_tree, pinfo, offset );
msg_len = tvb_length(cbs_msg_tvb);
cbs_subtree = proto_tree_add_subtree_format(cbs_tree, tvb, offset, -1,
ett_cbs_msg, NULL, "Cell Broadcast Message Contents (length: %d)", msg_len);
msg = tvb_get_string_enc(wmem_packet_scope(), cbs_msg_tvb, 0, msg_len, ENC_ASCII);
proto_tree_add_string_format(cbs_subtree, hf_gsm_cbs_message_content, cbs_msg_tvb, 0, -1, msg, "%s", msg);
}
void dissect_umts_cell_broadcast_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint8 sms_encoding;
guint32 offset = 0;
guint32 len;
proto_item *cbs_item = NULL, *cbs_item2 = NULL;
proto_tree *cbs_tree = NULL, *cbs_subtree = NULL;
guint16 msg_len;
tvbuff_t * cbs_msg_tvb = NULL;
len = tvb_length(tvb);
col_append_str(pinfo->cinfo, COL_PROTOCOL, " Cell Broadcast");
col_append_str(pinfo->cinfo, COL_INFO, " (CBS Message)");
cbs_item = proto_tree_add_protocol_format(proto_tree_get_root(tree), proto_cell_broadcast, tvb, 0, len, "Cell Broadcast");
cbs_tree = proto_item_add_subtree(cbs_item, ett_cbs_msg);
sms_encoding = dissect_cbs_data_coding_scheme(tvb, pinfo, cbs_tree, 0);
offset++;
cbs_msg_tvb = dissect_cbs_data(sms_encoding, tvb, cbs_tree, pinfo, offset );
msg_len = tvb_length(cbs_msg_tvb);
cbs_item2 = proto_tree_add_text(cbs_tree, tvb, offset, -1, "Cell Broadcast Message Contents (length: %d)", msg_len);
cbs_subtree = proto_item_add_subtree(cbs_item2, ett_cbs_msg);
proto_tree_add_text(cbs_subtree, cbs_msg_tvb , 0, tvb_length(cbs_msg_tvb), "%s", tvb_get_ephemeral_string(cbs_msg_tvb, 0, msg_len));
}
tvbuff_t *cbs_msg_tvb = NULL;
fragment_head * frag_data = NULL;
len = tvb_reported_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_reported_length(cbs_page_tvb);
while (text_len && (tvb_get_guint8(cbs_page_tvb, text_len-1) == '\r')) {
text_len--;
}
if (tree != NULL)
{
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 gint
dissect_cbsp_tlvs(tvbuff_t *tvb, int base_offs, int length, packet_info *pinfo, proto_tree *tree)
{
guint8 sms_encoding = SMS_ENCODING_7BIT;
int offset = base_offs;
while (offset - base_offs < length) {
guint8 tag; /* Information Element Identifier */
unsigned int len; /* Length of payload */
unsigned int len_len = 0;/* Length of "length" field (may be 0) */
proto_item *ti;
proto_tree *att_tree, *subtree;
guint32 tmp_u;
int secs;
tag = tvb_get_guint8(tvb, offset);
offset++;
switch (cbsp_att_tlvdef.def[tag].type) {
case TLV_TYPE_TV:
len = 1;
len_len = 0;
break;
case TLV_TYPE_FIXED:
len = cbsp_att_tlvdef.def[tag].fixed_len;
len_len = 0;
break;
case TLV_TYPE_TLV:
len = tvb_get_guint8(tvb, offset);
break;
case TLV_TYPE_TL16V:
len = tvb_get_guint16(tvb, offset, ENC_BIG_ENDIAN);
len_len = 2;
break;
default:
return length;
}
att_tree = proto_tree_add_subtree_format(tree, tvb, offset-1, 1+len_len+len,
ett_cbsp_ie, &ti, "IE: %s",
val_to_str(tag, cbsp_iei_names, "Unknown 0x%02x"));
proto_tree_add_item(att_tree, hf_cbsp_iei, tvb, offset-1, 1, ENC_NA);
if (len_len)
proto_tree_add_uint(att_tree, hf_cbsp_ie_len, tvb, offset, len_len, len);
offset += len_len;
switch (tag) {
case CBSP_IEI_MSG_CONTENT:
dissect_cbsp_content_ie(tvb, pinfo, offset, len, att_tree, sms_encoding, ti);
break;
case CBSP_IEI_OLD_SERIAL_NR:
proto_tree_add_item_ret_uint(att_tree, hf_cbsp_old_serial_nr, tvb, offset, len, ENC_BIG_ENDIAN, &tmp_u);
proto_item_append_text(ti, ": 0x%04x", tmp_u);
break;
case CBSP_IEI_NEW_SERIAL_NR:
proto_tree_add_item_ret_uint(att_tree, hf_cbsp_new_serial_nr, tvb, offset, len, ENC_BIG_ENDIAN, &tmp_u);
proto_item_append_text(ti, ": 0x%04x", tmp_u);
break;
case CBSP_IEI_CATEGORY:
proto_tree_add_item_ret_uint(att_tree, hf_cbsp_category, tvb, offset, len, ENC_NA,&tmp_u);
proto_item_append_text(ti, ": %s", val_to_str_const(tmp_u, cbsp_category_names, ""));
break;
case CBSP_IEI_REP_PERIOD:
proto_tree_add_item_ret_uint(att_tree, hf_cbsp_rep_period, tvb, offset, len, ENC_BIG_ENDIAN, &tmp_u);
proto_item_append_text(ti, ": %u", tmp_u);
break;
case CBSP_IEI_NUM_BCAST_REQ:
proto_tree_add_item_ret_uint(att_tree, hf_cbsp_num_bcast_req, tvb, offset, len, ENC_BIG_ENDIAN, &tmp_u);
proto_item_append_text(ti, ": %u", tmp_u);
break;
case CBSP_IEI_CAUSE:
proto_tree_add_item_ret_uint(att_tree, hf_cbsp_cause, tvb, offset, len, ENC_NA, &tmp_u);
proto_item_append_text(ti, ": %s", val_to_str_const(tmp_u, cbsp_cause_vals, ""));
break;
case CBSP_IEI_DCS:
proto_tree_add_item_ret_uint(att_tree, hf_cbsp_dcs, tvb, offset, len, ENC_NA, &tmp_u);
subtree = proto_item_add_subtree(att_tree, ett_cbsp_cbs_data_coding);
sms_encoding = dissect_cbs_data_coding_scheme(tvb, pinfo, subtree, offset);
proto_item_append_text(ti, ": 0x%02x", tmp_u);
break;
case CBSP_IEI_RECOVERY_IND:
proto_tree_add_item(att_tree, hf_cbsp_recovery_ind, tvb, offset, len, ENC_NA);
break;
case CBSP_IEI_MSG_ID:
proto_tree_add_item_ret_uint(att_tree, hf_cbsp_msg_id, tvb, offset, len, ENC_BIG_ENDIAN, &tmp_u);
proto_item_append_text(ti, ": 0x%04x", tmp_u);
break;
case CBSP_IEI_EMERG_IND:
proto_tree_add_item_ret_uint(att_tree, hf_cbsp_emerg_ind, tvb, offset, len, ENC_NA, &tmp_u);
proto_item_append_text(ti, ": %s", val_to_str_const(tmp_u, cbsp_emerg_ind_vals, ""));
break;
case CBSP_IEI_WARN_TYPE:
proto_tree_add_item(att_tree, hf_cbsp_warn_type, tvb, offset, len, ENC_NA);
break;
case CBSP_IEI_CHANNEL_IND:
proto_tree_add_item_ret_uint(att_tree, hf_cbsp_channel_ind, tvb, offset, len, ENC_NA, &tmp_u);
proto_item_append_text(ti, ": %s", val_to_str_const(tmp_u, cbsp_chan_ind_vals, ""));
break;
case CBSP_IEI_NUM_OF_PAGES:
proto_tree_add_item_ret_uint(att_tree, hf_cbsp_num_of_pages, tvb, offset, len, ENC_NA, &tmp_u);
proto_item_append_text(ti, ": %u", tmp_u);
break;
case CBSP_IEI_SCHEDULE_PERIOD:
proto_tree_add_item(att_tree, hf_cbsp_sched_period, tvb, offset, len, ENC_NA);
break;
case CBSP_IEI_NUM_OF_RES_SLOTS:
proto_tree_add_item(att_tree, hf_cbsp_num_of_res_slots, tvb, offset, len, ENC_NA);
break;
case CBSP_IEI_BCAST_MSG_TYPE:
proto_tree_add_item_ret_uint(att_tree, hf_cbsp_bcast_msg_type, tvb, offset, len, ENC_NA, &tmp_u);
proto_item_append_text(ti, ": %s", val_to_str_const(tmp_u, cbsp_bcast_msg_type_vals, ""));
break;
case CBSP_IEI_WARNING_PERIOD:
secs = cbsp_warn_period_to_secs(tvb_get_guint8(tvb, offset));
proto_tree_add_uint(att_tree, hf_cbsp_warning_period, tvb, offset, len, secs);
proto_item_append_text(ti, ": %u (s)", secs);
break;
case CBSP_IEI_KEEP_ALIVE_REP_PERIOD:
secs = cbsp_warn_period_to_secs(tvb_get_guint8(tvb, offset));
proto_tree_add_uint(att_tree, hf_cbsp_keepalive_period, tvb, offset, len, secs);
proto_item_append_text(ti, ": %u (s)", secs);
break;
case CBSP_IEI_CELL_LIST:
dissect_cell_id_list_ie(tvb, pinfo, offset, len, att_tree, ti);
break;
case CBSP_IEI_NUM_BCAST_COMPL_LIST:
dissect_bc_compl_list_ie(tvb, pinfo, offset, len, att_tree, ti);
break;
case CBSP_IEI_FAILURE_LIST:
dissect_failure_list_ie(tvb, pinfo, offset, len, att_tree, ti);
break;
case CBSP_IEI_RR_LOADING_LIST:
dissect_rr_load_list_ie(tvb, pinfo, offset, len, att_tree, ti);
break;
case CBSP_IEI_WARN_SEC_INFO:
/* this element is bogus / not used anyway, no need for a dissector */
default:
/* Unknown/unsupported IE: Print raw payload in addition to IEI + Length printed above */
proto_tree_add_item(att_tree, hf_cbsp_ie_payload, tvb, offset, len, ENC_NA);
break;
}
offset += len;
}
return offset;
}
