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)); }
/* 3GPP TS 23.041 version 11.4.0 * 9.4.2.2.5 CB Data */ static void dissect_sabp_cb_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { proto_item *item, *cbs_page_item; proto_tree *subtree; tvbuff_t *page_tvb, *unpacked_tvb; int offset = 0; int n; guint8 nr_pages, len, cb_inf_msg_len; /* Octet 1 Number-of-Pages */ nr_pages = tvb_get_guint8(tvb, offset); proto_tree_add_item(tree, hf_sabp_no_of_pages, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; /* * NOTE: n equal to or less than 15 */ if(nr_pages > 15){ /* Error */ return; } for (n = 0; n < nr_pages; n++) { item = proto_tree_add_text(tree, tvb, offset, 83, "CB page %u data", n+1); subtree = proto_item_add_subtree(item, ett_sabp_cbs_page); /* octet 2 - 83 CBS-Message-Information-Page 1 */ cbs_page_item = proto_tree_add_item(subtree, hf_sabp_cb_msg_inf_page, tvb, offset, 82, ENC_BIG_ENDIAN); cb_inf_msg_len = tvb_get_guint8(tvb,offset+82); page_tvb = tvb_new_subset(tvb, offset, cb_inf_msg_len, cb_inf_msg_len); unpacked_tvb = dissect_cbs_data(sms_encoding, page_tvb, subtree, pinfo, 0); len = tvb_length(unpacked_tvb); if (unpacked_tvb != NULL){ if (tree != NULL){ proto_tree *cbs_page_subtree = proto_item_add_subtree(cbs_page_item, ett_sabp_cbs_page_content); proto_tree_add_item(cbs_page_subtree, hf_sabp_cbs_page_content, unpacked_tvb, 0, len, ENC_UTF_8|ENC_NA); } } offset = offset+82; /* 84 CBS-Message-Information-Length 1 */ proto_tree_add_item(subtree, hf_sabp_cb_inf_len, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; } }
static void dissect_cbsp_content_ie(tvbuff_t *tvb, packet_info *pinfo, guint offset, gint len, proto_tree *tree, guint8 sms_encoding, proto_item *ti) { proto_item *cbs_page_item; tvbuff_t *next_tvb, *unpacked_tvb; const guint8 *pstr; proto_tree_add_item(tree, hf_cbsp_user_info_length, tvb, offset, 1, ENC_NA); cbs_page_item = proto_tree_add_item(tree, hf_cbsp_cb_msg_page, tvb, offset+1, len-1, ENC_NA); next_tvb = tvb_new_subset_length(tvb, offset+1, len-1); unpacked_tvb = dissect_cbs_data(sms_encoding, next_tvb, tree, pinfo, 0); if (tree) { guint captured_len = tvb_captured_length(unpacked_tvb); proto_tree *cbs_page_subtree = proto_item_add_subtree(cbs_page_item, ett_cbsp_cbs_page_content); proto_tree_add_item_ret_string(cbs_page_subtree, hf_cbsp_cbs_page_content, unpacked_tvb, 0, captured_len, ENC_UTF_8|ENC_NA, wmem_packet_scope(), &pstr); proto_item_append_text(ti, ": '%s'", pstr); } }
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) { 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_reported_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;
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)); } }