From a23197980e40d4d9414bcfaf59005a1dc2a89251 Mon Sep 17 00:00:00 2001 From: sreejith Date: Wed, 29 Mar 2017 01:15:02 -0400 Subject: Added vpp intial source code from master branch 17.01.1 Change-Id: I81bdace6f330825a1746a853766779dfb24765fd Signed-off-by: sreejith --- vpp/plugins/vcgn-plugin/vcgn/cnat_show_response.h | 580 ++++++++++++++++++++++ 1 file changed, 580 insertions(+) create mode 100644 vpp/plugins/vcgn-plugin/vcgn/cnat_show_response.h (limited to 'vpp/plugins/vcgn-plugin/vcgn/cnat_show_response.h') diff --git a/vpp/plugins/vcgn-plugin/vcgn/cnat_show_response.h b/vpp/plugins/vcgn-plugin/vcgn/cnat_show_response.h new file mode 100644 index 00000000..bec1bd97 --- /dev/null +++ b/vpp/plugins/vcgn-plugin/vcgn/cnat_show_response.h @@ -0,0 +1,580 @@ +/* + *------------------------------------------------------------------ + * cnat_show_response.h show command response structs + * + * Copyright (c) 2007-2013 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + *------------------------------------------------------------------ + */ + +#ifndef __CNAT_SHOW_RESPONSE_H__ +#define __CNAT_SHOW_RESPONSE_H__ + +/* + * Flags indicating the type of translation entry + */ +#define CNAT_TRANSLATION_ENTRY_ALL 0x0 +#define CNAT_TRANSLATION_ENTRY_STATIC 0x1 +#define CNAT_TRANSLATION_ENTRY_ALG 0x2 +#define CNAT_TRANSLATION_ENTRY_DYNAMIC 0x4 + +/* for PCP support */ +#define CNAT_TRANSLATION_ENTRY_PCPI_DYNAMIC 0x08 +#define CNAT_TRANSLATION_ENTRY_PCPE_DYNAMIC 0x10 + +#define MAX_NODE_NAME_LEN 18 +#define MAX_CTR_NAME_LEN 10 + +/* + * show translation entry response structures + */ +typedef struct { + u16 call_id; + u16 cnat_call_id; /* mapped call Id */ + u16 dst_call_id; /* dest call id */ +} cnat_v4_show_gre_entry; + +typedef struct { + u16 msg_id; + u16 rc; /* o/p parameter. */ + u16 num_entries; /* Number of entries sent as output */ + u16 vrf_id; /* vrf id */ + u32 pns_ip; + cnat_v4_show_gre_entry entries[0]; +} cnat_v4_show_gre_entry_resp; + +/* + * show translation entry response structures + */ +typedef struct { + u32 ipv4_addr; + u16 src_port; + u16 cnat_port; /* port which replaced the src port */ + u8 protocol; + u8 pad; + u16 flags; + u16 nsessions; + u32 in2out_packets; + u32 out2in_packets; +} cnat_v4_show_translation_entry; + +typedef struct { + u16 msg_id; + u8 rc; /* o/p parameter. */ + u8 num_entries; /* Number of entries sent as output */ + u16 vrf_id; /* vrf id */ + u16 pad; + cnat_v4_show_translation_entry entries[0]; +} cnat_v4_show_entry_resp; + +/* + * show free/used ipv4 address/port response structure + */ +typedef struct { + u32 ip_addr; + u32 free_used_ports; +} cnat_v4_show_free_used_entry; + +typedef struct { + u16 msg_id; + u8 rc; + u8 count; + u32 max_ports; + cnat_v4_show_free_used_entry entry_list[0]; +} cnat_v4_show_free_used_entry_resp; + +/* + * Node name to id mapping + */ +typedef struct { + u8 node_id; + u8 pad; + char node_name[MAX_NODE_NAME_LEN]; +} cnat_statistics_node_name; + +typedef struct { + u16 msg_id; + u8 rc; + u8 num_nodes; + cnat_statistics_node_name node_name_array[0]; +} cnat_statistics_node_name_mapping_resp; + +/* + * Counter name to id mapping + */ +typedef struct { + u8 node_id; + u8 counter_id; + char counter_name[MAX_CTR_NAME_LEN]; +} cnat_statistics_counter_name; + +typedef struct { + u16 msg_id; + u8 rc; + u8 num_counters; + cnat_statistics_counter_name counter_name_array[0]; +} cnat_statistics_counter_name_mapping_resp; + + +/* + * Node name to id mapping + */ +typedef struct { + u16 msg_id; + u8 rc; + u8 num_nodes; + u32 pad; + u64 counters [0]; +} cnat_statistics_counter_values; + +/* + * Summary Stats + */ +typedef struct { + u32 eaddr; + u32 ports_used; +} pool_address_usage_t; + +typedef struct { + u16 msg_id; + u8 rc; + u8 pad; + u16 max_pkt_size; + u16 pool_address_copied; + u32 active_translations; + u32 translation_create_rate; + u32 translation_delete_rate; + u32 in2out_forwarding_rate; + u32 out2in_forwarding_rate; + u32 dummy; + u64 in2out_drops_port_limit_exceeded; + u64 in2out_drops_system_limit_reached; + u64 in2out_drops_resource_depletion; + u64 no_translation_entry_drops; + u64 pptp_active_tunnels; + u64 pptp_active_channels; + u64 pptp_ctrlmsg_drops; + u32 no_sessions; + + u32 pool_address_totally_free; + u32 pool_address_used; /* The following array size will be lesser of + (pool_address_used, 200) */ + u32 num_subscribers; + u64 drops_sessiondb_limit_exceeded; + u64 in2out_drops_src_ip_no_config; // for deterministic nat on brahmos + pool_address_usage_t pool_address_usage[0]; +} cnat_show_statistics_summary_resp; + + +typedef struct { + u16 msg_id; + u8 rc; + u8 pad; + u64 o2i_tcp_seq_mismatch_drop; + u64 o2i_tcp_seq_mismatch; + u64 o2i_sessions_created; + u64 o2i_end_point_filter_drop; +} cnat_show_counters_summary_resp; + + +typedef struct { + u16 msg_id; + u8 rc; + u8 pad; + + /* + * XLAT statistics + */ + u64 v6_to_v4_tcp_input_count; + u64 v6_to_v4_tcp_non_translatable_drop_count; + u64 v6_to_v4_tcp_invalid_next_hdr_drop_count; + u64 v6_to_v4_tcp_no_db_drop_count; + u64 v6_to_v4_tcp_output_count; + + u64 v4_to_v6_tcp_input_count; + u64 v4_to_v6_tcp_no_db_drop_count; + u64 v4_to_v6_tcp_output_count; + + u64 v6_to_v4_udp_input_count; + u64 v6_to_v4_udp_non_translatable_drop_count; + u64 v6_to_v4_udp_invalid_next_hdr_drop_count; + u64 v6_to_v4_udp_no_db_drop_count; + u64 v6_to_v4_udp_output_count; + + u64 v4_to_v6_udp_input_count; + u64 v4_to_v6_udp_no_db_drop_count; + u64 v4_to_v6_udp_output_count; + u64 v4_to_v6_udp_frag_crc_zero_drop_count; + u64 v4_to_v6_udp_crc_zero_recycle_sent_count; + u64 v4_to_v6_udp_crc_zero_recycle_drop_count; + + u64 v6_to_v4_icmp_qry_input_count; + u64 v6_to_v4_icmp_no_db_drop_count; + u64 v6_to_v4_icmp_frag_drop_count; + u64 v6_to_v4_icmp_invalid_next_hdr_drop_count; + u64 v6_to_v4_icmp_non_translatable_drop_count; + u64 v6_to_v4_icmp_non_translatable_fwd_count; + u64 v6_to_v4_icmp_unsupported_type_drop_count; + u64 v6_to_v4_icmp_err_output_count; + u64 v6_to_v4_icmp_qry_output_count; + + u64 v4_to_v6_icmp_qry_input_count; + u64 v4_to_v6_icmp_no_db_drop_count; + u64 v4_to_v6_icmp_frag_drop_count; + u64 v4_to_v6_icmp_unsupported_type_drop_count; + u64 v4_to_v6_icmp_err_output_count; + u64 v4_to_v6_icmp_qry_output_count; + + u64 v6_to_v4_subsequent_frag_input_count; + u64 v6_to_v4_subsequent_frag_non_translatable_drop_count; + u64 v6_to_v4_subsequent_frag_invalid_next_hdr_drop_count; + u64 v6_to_v4_subsequent_frag_no_db_drop_count; + u64 v6_to_v4_subsequent_frag_output_count; + + u64 v4_to_v6_subsequent_frag_input_count; + u64 v4_to_v6_subsequent_frag_no_db_drop_count; + u64 v4_to_v6_subsequent_frag_output_count; + + u64 v4_to_v6_subsequent_frag_drop_count; + u64 v4_to_v6_subsequent_frag_throttled_count; + u64 v4_to_v6_subsequent_frag_timeout_drop_count; + u64 v4_to_v6_subsequent_frag_tcp_input_count; + u64 v4_to_v6_subsequent_frag_udp_input_count; + u64 v4_to_v6_subsequent_frag_icmp_input_count; + + u64 v6_to_v4_options_input_count; + u64 v6_to_v4_options_drop_count; + u64 v6_to_v4_options_forward_count; + u64 v6_to_v4_options_no_db_drop_count; + u64 v6_to_v4_unsupp_proto_count; + + u64 v4_to_v6_options_input_count; + u64 v4_to_v6_options_drop_count; + u64 v4_to_v6_options_forward_count; + u64 v4_to_v6_options_no_db_drop_count; + u64 v4_to_v6_unsupp_proto_count; + + u64 v4_icmp_gen_count; + u64 v6_icmp_gen_count; +} xlat_show_statistics_summary_resp; + +typedef struct { + u16 msg_id; + u8 rc; + u8 pad; + /* Total v4 packets to BR */ + u64 v4_to_v6_input_total_count; + /* Total v4 tunneled packets to BR */ + u64 v4_to_v6_41_input_total_count; + /* proto 41 packets without minimum, of 40, v6 payload */ + u64 v4_to_v6_41_insuff_v6payld_count; + /* total proto 41 packets being considered for decap */ + u64 v4_to_v6_41_valid_count; + /* proto 41 packets that failed security check*/ + u64 v4_to_v6_41_sec_check_fail_count; + /* packets with no active db entry */ + u64 v4_to_v6_no_db_drop_count; + /* proto 41 packets actually getting decapped */ + u64 v4_to_v6_41_decap_count; + /* total v4 packets which are neither icmp nor 41 */ + u64 v4_to_v6_unsupported_protocol_count; + /* v4 tunneled packets with invalid v6 source address */ + u64 v4_to_v6_41_invalid_v6_source; + /* total icmpv4 packets destined to BR */ + u64 v4_forus_icmp_input_count; + /* total icmpv4 echo replies by BR */ + u64 v4_icmp_reply_count; + /* total icmpv4 error messages translated to icmpv6 by BR */ + u64 v4_to_v6_icmp_translation_count; + /* total packets with icmpv4 type/code which are not supported by BR */ + u64 v4_icmp_unsupported_count; + /* total icmpv4 packets which are rate-limited by BR */ + u64 v4_icmp_throttled_count; + /* total ICMPv4 error messages which could not be translated */ + u64 v4_icmp_non_translatable_drop_count; + + /* ipv4 defrag stats */ + u64 v4_to_v6_frag_input_count; + u64 v4_to_v6_frag_sec_check_fail_count; + u64 v4_to_v6_frag_reassem_count; + u64 v4_to_v6_frag_timeout_drop_count; + u64 v4_to_v6_frag_icmp_input_count; + u64 v4_to_v6_frag_41_insuff_v6payld_count; + u64 v4_to_v6_frag_no_db_drop_count; + u64 v4_to_v6_frag_unsupported_protocol_count; + u64 v4_to_v6_frag_41_invalid_v6_source; + u64 v4_to_v6_frag_throttled_count; + u64 v4_to_v6_frag_dup_count; + u64 v4_to_v6_frag_reassem_frag_count; + u64 v4_to_v6_frag_disable_count; + u64 v4_to_v6_frag_drop_count; + + /* total v6 packets input to BR */ + u64 v6_to_v4_total_input_count; + /* v6 packets with no active db entry */ + u64 v6_to_v4_no_db_drop_count; + /* forus v6 packets with next header other than icmpv6 */ + u64 v6_to_v4_forus_unsupp_proto_count; + /* total v6 packets that got tunneled */ + u64 v6_to_v4_encap_count; + /* total icmpv6 packets destined to BR */ + u64 v6_forus_icmp_input_count; + /* total icmpv6 echo replies by BR */ + u64 v6_icmp_reply_count; + /* total icmpv6 PTB messages generated by BR */ + u64 v6_ptb_generated_count; + /* total ipv6 packets for which PTBv6 was NOT generated by BR */ + u64 v6_ptb_not_generated_drop_count; + /* total icmpv6 Neighbor Advertisements generated by BR */ + u64 v6_na_generated_count; + /* total icmpv6 TTL expiry messages generated by BR */ + u64 v6_ttl_expiry_generated_count; + /* total ICMPv6 fragments, which are dropped by BR */ + u64 v6_to_v4_frag_icmp_input_count; + /* total packets with icmpv6 type/code which are not supported by BR */ + u64 v6_icmp_unsupported_count; + /* total icmpv6 packets which are rate-limited by BR */ + u64 v6_icmp_throttled_count; +} v6rd_show_statistics_summary_resp; + +typedef struct { + u16 msg_id; + u8 rc; + u8 pad; + + /* Total Incoming Count */ + u64 v4_input_count; + /* Total Drop Count */ + u64 v4_drop_count; + /* Total Output Count */ + u64 v4_to_v6_output_count; + /* TCP Incoming Count */ + u64 v4_tcp_input_count; + /* TCP Output Count */ + u64 v4_tcp_output_count; + /* UDP Incoming Count */ + u64 v4_udp_input_count; + /* UDP Output Count */ + u64 v4_udp_output_count; + /* ICMPv4 Incoming Count */ + u64 v4_icmp_input_count; + /* ICMPv4 Output Count */ + u64 v4_to_v6_icmp_output_count; + /* Invalid UIDB Drop Count */ + u64 v4_invalid_uidb_drop_count; + /* NoDb Drop Count */ + u64 v4_no_db_drop_count; + /* TTL Expire Drop Count */ + u64 v4_ttl_expire_drop_count; + /* Invalid IP Destination Drop Count */ + u64 v4_invalid_destination_prefix_drop_count; + /* Packet Execeeding Path MTU Drop Count */ + u64 v4_path_mtu_exceed_count; + /* Unsupported Protocol Drop Count */ + u64 v4_invalid_proto_type_drop_count; + /* ICMPv4 Generated for TTL Expire Count */ + u64 v4_ttl_expiry_generated_count; + /* ICMPv4 Generated for Error Count */ + u64 v4_icmp_error_gen_count; + /* ICMPv4 Packets Rate-Limited Count */ + u64 v4_icmp_throttled_drop_count; + /* TCP MSS Changed Count */ + u64 v4_tcp_mss_changed_count; + + /* Total Incoming Count */ + u64 v6_input_count; + /* Total Drop Count */ + u64 v6_drop_count; + /* Total Output Count */ + u64 v6_to_v4_output_count; + /* TCP Incoming Count */ + u64 v6_tcp_input_count; + /* TCP Output Count */ + u64 v6_tcp_output_count; + /* UDP Incoming Count */ + u64 v6_udp_input_count; + /* UDP Output Count */ + u64 v6_udp_output_count; + /* ICMPv4 Incoming Count */ + u64 v6_icmpv4_input_count; + /* ICMPv4 Output Count */ + u64 v6_icmpv4_output_count; + /* Invalid UIDB Drop Count */ + u64 v6_invalid_uidb_drop_count; + /* NoDb Drop Count */ + u64 v6_no_db_drop_count; + /* TTL Expire Drop Count */ + u64 v6_ttl_expire_drop_count; + /* Invalid IPv6 Destination Drop Count */ + u64 v6_invalid_destination_drop_count; + /* Invalid Source Prefix Drop Count */ + u64 v6_invalid_source_prefix_drop_count; + /* Unsupported Protocol Drop Count */ + u64 v6_invalid_proto_type_drop_count; + /* ICMPv6 Input Count */ + u64 v6_icmp_input_count; + /* ICMPv6 Invalid UIDB Drop Count */ + u64 v6_icmp_invalid_uidb_drop_count; + /* ICMPv6 NoDb Drop Count */ + u64 v6_icmp_no_db_drop_count; + /* ICMPv6 TTL Expire Drop Count */ + u64 v6_icmp_ttl_expire_drop_count; + /* ICMPv6 Invalid IPv6 Destination Drop Count */ + u64 v6_icmp_invalid_destination_drop_count; + /* ICMPv6 Unsupported Type Drop Count */ + u64 v6_icmp_unsupported_type_drop_count; + /* ICMPv6 Invalid NxtHdr Drop Count*/ + u64 v6_icmp_unsupported_nxthdr_drop_count; + /* ICMPv6 Frag Drop Count */ + u64 v6_icmp_frag_drop_count; + /* ICMPv6 Forus Count */ + u64 v6_forus_icmp_input_count; + /* ICMPv6 Echo Response Received Count */ + u64 v6_received_echo_response_count; + /* ICMPv6 Echo Replies Count */ + u64 v6_echo_reply_count; + /* ICMPv6 Translated to ICMPV4 Output Count*/ + u64 v6_to_v4_icmp_output_count; + /* ICMPv6 Generated for TTL Expire Count */ + u64 v6_ttl_expiry_generated_count; + /* ICMPv6 Generated for Error Count */ + u64 v6_icmp_error_gen_count; + /* ICMPv6 Packets Rate-Limited Count */ + u64 v6_icmp_throttled_drop_count; + /* TCP MSS Changed Count */ + u64 v6_tcp_mss_changed_count; + + /*Total Input Count*/ + u64 v4_to_v6_frag_input_count; + /*Total Drop Count*/ + u64 v4_to_v6_frag_drop_count; + /*Reassembled Output Count*/ + u64 v4_to_v6_frag_reassem_count; + + /*TCP Input Count*/ + u64 v4_to_v6_frag_tcp_input_count; + /*UDP Input Count*/ + u64 v4_to_v6_frag_udp_input_count; + /*ICMPv4 Input Count*/ + u64 v4_to_v6_frag_icmp_input_count; + + /*Invalid UIDB Drop Count */ + u64 v4_to_v6_frag_invalid_uidb_drop_count; + /*NoDb Drop Count*/ + u64 v4_to_v6_frag_no_db_drop_count; + /*Unsupported Protocol Drop Count*/ + u64 v4_to_v6_frag_invalid_proto_type_drop_count; + /*Throttled Count*/ + u64 v4_to_v6_frag_throttled_count; + /*Timeout Drop Count*/ + u64 v4_to_v6_frag_timeout_drop_count; + /*Duplicates Drop Count*/ + u64 v4_to_v6_frag_dup_count; + + /*Total Input Count*/ + u64 v6_to_v4_inner_frag_input_count; + /*Total Drop Count*/ + u64 v6_to_v4_inner_frag_drop_count; + /*Total Output Count*/ + u64 v6_to_v4_inner_frag_output_count; + + /*TCP Input Count*/ + u64 v6_to_v4_inner_frag_tcp_input_count; + /*UDP Input Count*/ + u64 v6_to_v4_inner_frag_udp_input_count; + /*ICMPv4 Input Count*/ + u64 v6_to_v4_inner_frag_icmp_input_count; + + /*Invalid Source Prefix Drop Count*/ + u64 v6_to_v4_inner_frag_invalid_source_prefix_drop_count; + /*Unsupported Protocol Drop Count*/ + u64 v6_to_v4_inner_frag_invalid_proto_type_drop_count; + /*Throttled Count*/ + u64 v6_to_v4_inner_frag_throttled_count; + /*Timeout Drop Count*/ + u64 v6_to_v4_inner_frag_timeout_drop_count; + /*Duplicates Drop Count*/ + u64 v6_to_v4_inner_frag_dup_count; + + /*ICMPv6 Generated for Error Count */ + u64 v6_to_v4_inner_frag_icmp_error_gen_count; + /*ICMPv6 Packets Rate-Limited Count */ + u64 v6_to_v4_inner_frag_icmp_throttled_drop_count; + + /*TCP MSS Changed Count */ + u64 v6_to_v4_inner_frag_tcp_mss_changed_count; + +} mape_show_statistics_summary_resp; + +/* + * The following are the command types for Generic Command cases + */ +#define CNAT_DEBUG_GENERIC_COMMAND_READ_MEM 1 +#define CNAT_DEBUG_GENERIC_COMMAND_WRITE_MEM 2 +#define CNAT_DEBUG_GENERIC_COMMAND_DB_SUMMARY 3 +#define CNAT_DEBUG_GENERIC_COMMAND_USER_DB_PM 4 +#define CNAT_DEBUG_GET_CGN_DB_SUMMARY 5 + +typedef enum { + CNAT_DEBUG_GENERIC_COMMAND_DUMP_POLICY, + CNAT_DEBUG_GENERIC_COMMAND_DUMP_MAIN_DB, + CNAT_DEBUG_GENERIC_COMMAND_DUMP_USER_DB, + CNAT_DEBUG_GENERIC_COMMAND_DUMP_HASHES_DB, + CNAT_DEBUG_GENERIC_COMMAND_DUMP_VRF_MAP, + CNAT_DEBUG_GENERIC_COMMAND_DUMP_SUMMARY_DB, + CNAT_DEBUG_GENERIC_COMMAND_DUMP_STATS, + CNAT_DEBUG_GENERIC_COMMAND_CLEAR_STATS, + CNAT_DEBUG_GENERIC_COMMAND_DUMP_NODE_COUNTER, + CNAT_DEBUG_GENERIC_COMMAND_CLEAR_NODE_COUNTER, + CNAT_DEBUG_GENERIC_COMMAND_DUMP_CNAT_COUNTER, + CNAT_DEBUG_GENERIC_COMMAND_DUMP_VA, + CNAT_DEBUG_GENERIC_COMMAND_SHOW_CONFIG, + CNAT_DEBUG_GENERIC_COMMAND_SHOW_NFV9, + CNAT_DEBUG_GENERIC_COMMAND_SHOW_IVRF, + CNAT_DEBUG_GENERIC_COMMAND_SHOW_OVRF, + CNAT_DEBUG_SPP_LOG, + CNAT_DEBUG_GENERIC_COMMAND_DEBUG_OPTIONS, + CNAT_DEBUG_GENERIC_COMMAND_DUMP_DEBUG_LEVELS, + CNAT_DEBUG_GENERIC_COMMAND_DEBUG_FLAGS, + CNAT_READ_TEMP_SENSORS, + CNAT_BLOCK_OCTEON_SENSOR_READ, + CNAT_DEBUG_GENERIC_COMMAND_DUMP_MAIN_DB_SUMMARY, + CNAT_DEBUG_GENERIC_COMMAND_DUMP_USER_DB_SUMMARY, + CNAT_DEBUG_DUMP_6RD_STATS, + CNAT_DEBUG_TIMEOUT_DB_SUMMARY, + CNAT_NAT64_STFUL_DEBUG_COMMAND, + CNAT_DEBUG_SET_BULK_SIZE, + CNAT_DEBUG_SHOW_BULK_STAT, + CNAT_DEBUG_CLEAR_BULK_STAT, + CNAT_DEBUG_SHOW_BULK_ALLOC, + CNAT_DEBUG_NAT64, + CNAT_DEBUG_NAT44_IN2OUT_FRAG_STATS, +} cnat_debug_dump_type_t; + +typedef enum { + CNAT_DEBUG_FLAG_UDP_INSIDE_CHECKSUM_MODIFY, + CNAT_DEBUG_FLAG_UDP_OUTSIDE_CHECKSUM_MODIFY, + CNAT_DEBUG_FLAG_UDP_INSIDE_PACKET_DUMP, + CNAT_DEBUG_FLAG_UDP_OUTSIDE_PACKET_DUMP, +} cnat_debug_flag_type_t; + +typedef struct { + u16 spp_msg_id; + u8 rc; + u8 core; + u32 num_bytes; + u8 raw_data[0]; +} cnat_generic_command_resp; + +extern u32 db_free_entry (void * p); +#endif /*__CNAT_SHOW_RESPONSE_H__*/ -- cgit 1.2.3-korg