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ntopng/include/Flow.h
Luca Deri cc623029e5 Added extra flow methods
2017-11-14 16:23:26 +01:00

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/*
*
* (C) 2013-17 - ntop.org
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* 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.
*
*/
#ifndef _FLOW_H_
#define _FLOW_H_
#include "ntop_includes.h"
typedef struct {
u_int32_t pktRetr, pktOOO, pktLost;
u_int64_t last, next;
} TCPPacketStats;
typedef struct {
struct timeval lastTime;
u_int64_t total_delta_ms;
float min_ms, max_ms;
} InterarrivalStats;
typedef struct {
InterarrivalStats pktTime;
} FlowPacketStats;
typedef enum {
flow_state_other = 0,
flow_state_syn,
flow_state_established,
flow_state_rst,
flow_state_fin,
} FlowState;
typedef enum {
SSL_STAGE_UNKNOWN = 0,
SSL_STAGE_HELLO,
SSL_STAGE_CCS
} FlowSSLStage;
typedef enum {
SSL_ENCRYPTION_PLAIN = 0x0,
SSL_ENCRYPTION_SERVER = 0x1,
SSL_ENCRYPTION_CLIENT = 0x2,
SSL_ENCRYPTION_BOTH = 0x3,
} FlowSSLEncryptionStatus;
class Flow : public GenericHashEntry {
private:
Host *cli_host, *srv_host;
u_int16_t cli_port, srv_port;
u_int16_t vlanId;
FlowState state;
u_int32_t vrfId;
u_int8_t protocol, src2dst_tcp_flags, dst2src_tcp_flags;
struct ndpi_flow_struct *ndpiFlow;
bool detection_completed, protocol_processed, blacklist_alarm_emitted,
cli2srv_direction, twh_over, dissect_next_http_packet, passVerdict,
check_tor, l7_protocol_guessed, flow_alerted, flow_dropped_counts_increased,
good_low_flow_detected, good_ssl_hs,
quota_exceeded, cli_quota_app_proto, cli_quota_is_category, srv_quota_app_proto, srv_quota_is_category;
u_int16_t diff_num_http_requests;
#ifdef NTOPNG_PRO
bool ingress2egress_direction;
u_int8_t routing_table_id;
#ifndef HAVE_NEDGE
FlowProfile *trafficProfile;
#endif
CounterTrend throughputTrend, goodputTrend, thptRatioTrend;
#endif
ndpi_protocol ndpiDetectedProtocol;
void *cli_id, *srv_id;
char *json_info, *host_server_name, *bt_hash;
bool dump_flow_traffic;
union {
struct {
char *last_url, *last_method;
char *last_content_type;
u_int16_t last_return_code;
} http;
struct {
char *last_query;
bool invalid_query;
} dns;
struct {
char *client_signature, *server_signature;
} ssh;
struct {
char *certificate, *server_certificate;
FlowSSLStage cli_stage, srv_stage;
u_int8_t hs_packets;
bool is_data;
/* firstdata refers to the time where encryption is active on both ends */
bool firstdata_seen;
struct timeval clienthello_time, hs_end_time, lastdata_time;
float hs_delta_time, delta_firstData, deltaTime_data;
} ssl;
struct {
u_int8_t icmp_type, icmp_code;
u_int16_t icmp_echo_id;
} icmp;
} protos;
struct {
u_int32_t device_ip;
u_int16_t in_index, out_index;
} flow_device;
/* Process Information */
ProcessInfo *client_proc, *server_proc;
/* Stats */
u_int32_t cli2srv_packets, srv2cli_packets;
u_int64_t cli2srv_bytes, srv2cli_bytes;
/* https://en.wikipedia.org/wiki/Goodput */
u_int64_t cli2srv_goodput_bytes, srv2cli_goodput_bytes;
/* TCP stats */
TCPPacketStats tcp_stats_s2d, tcp_stats_d2s;
u_int16_t cli2srv_window, srv2cli_window;
time_t doNotExpireBefore; /*
Used for collected flows via ZMQ to make sure that they are not immediately
expired if their last seen time is back in time with respect to ntopng
*/
struct timeval synTime, synAckTime, ackTime; /* network Latency (3-way handshake) */
struct timeval clientNwLatency; /* The RTT/2 between the client and nprobe */
struct timeval serverNwLatency; /* The RTT/2 between nprobe and the server */
struct timeval c2sFirstGoodputTime;
float rttSec, applLatencyMsec;
FlowPacketStats cli2srvStats, srv2cliStats;
/* Counter values at last host update */
struct {
u_int32_t cli2srv_packets, srv2cli_packets;
u_int64_t cli2srv_bytes, srv2cli_bytes;
u_int64_t cli2srv_goodput_bytes, srv2cli_goodput_bytes;
u_int32_t last_dump;
} last_db_dump;
#ifdef NTOPNG_PRO
struct {
struct {
TrafficShaper *ingress, *egress;
} cli2srv;
struct {
TrafficShaper *ingress, *egress;
} srv2cli;
} flowShaperIds;
#endif
struct timeval last_update_time;
float bytes_thpt, goodput_bytes_thpt, top_bytes_thpt, top_goodput_bytes_thpt, top_pkts_thpt;
float bytes_thpt_cli2srv, goodput_bytes_thpt_cli2srv;
float bytes_thpt_srv2cli, goodput_bytes_thpt_srv2cli;
float pkts_thpt, pkts_thpt_cli2srv, pkts_thpt_srv2cli;
ValueTrend bytes_thpt_trend, goodput_bytes_thpt_trend, pkts_thpt_trend;
//TimeSeries<float> *bytes_rate;
u_int64_t cli2srv_last_packets, srv2cli_last_packets,
prev_cli2srv_last_packets, prev_srv2cli_last_packets;
u_int64_t cli2srv_last_bytes, srv2cli_last_bytes,
cli2srv_last_goodput_bytes, srv2cli_last_goodput_bytes,
prev_cli2srv_last_bytes, prev_srv2cli_last_bytes,
prev_cli2srv_last_goodput_bytes, prev_srv2cli_last_goodput_bytes;
// tcpFlags = tp->th_flags, tcpSeqNum = ntohl(tp->th_seq), tcpAckNum = ntohl(tp->th_ack), tcpWin = ntohs(tp->th_win);
char* intoaV4(unsigned int addr, char* buf, u_short bufLen);
void processLua(lua_State* vm, ProcessInfo *proc, bool client);
void processJson(bool is_src, json_object *my_object, ProcessInfo *proc);
void checkBlacklistedFlow();
void allocDPIMemory();
bool checkTor(char *hostname);
void setBittorrentHash(char *hash);
bool isLowGoodput();
void updatePacketStats(InterarrivalStats *stats, const struct timeval *when);
void dumpPacketStats(lua_State* vm, bool cli2srv_direction);
inline u_int32_t getCurrentInterArrivalTime(time_t now, bool cli2srv_direction) {
return(1000 /* msec */
* (now - (cli2srv_direction ? cli2srvStats.pktTime.lastTime.tv_sec : srv2cliStats.pktTime.lastTime.tv_sec)));
}
char* printTCPflags(u_int8_t flags, char *buf, u_int buf_len);
inline bool isProto(u_int16_t p ) { return((ndpi_get_lower_proto(ndpiDetectedProtocol) == p) ? true : false); }
#ifdef NTOPNG_PRO
bool updateDirectionShapers(bool src2dst_direction, TrafficShaper **ingress_shaper, TrafficShaper **egress_shaper);
#endif
void dumpFlowAlert();
public:
Flow(NetworkInterface *_iface,
u_int16_t _vlanId, u_int8_t _protocol,
Mac *_cli_mac, IpAddress *_cli_ip, u_int16_t _cli_port,
Mac *_srv_mac, IpAddress *_srv_ip, u_int16_t _srv_port,
time_t _first_seen, time_t _last_seen);
~Flow();
FlowStatus getFlowStatus();
struct site_categories* getFlowCategory(bool force_categorization);
void freeDPIMemory();
bool isTiny();
inline bool isSSL() { return(isProto(NDPI_PROTOCOL_SSL)); }
inline bool isSSH() { return(isProto(NDPI_PROTOCOL_SSH)); }
inline bool isDNS() { return(isProto(NDPI_PROTOCOL_DNS)); }
inline bool isDHCP() { return(isProto(NDPI_PROTOCOL_DHCP)); }
inline bool isHTTP() { return(isProto(NDPI_PROTOCOL_HTTP)); }
inline bool isICMP() { return(isProto(NDPI_PROTOCOL_IP_ICMP) || isProto(NDPI_PROTOCOL_IP_ICMPV6)); }
inline bool isMaskedFlow() {
return(!get_cli_host() || Utils::maskHost(get_cli_host()->isLocalHost())
|| !get_srv_host() || Utils::maskHost(get_srv_host()->isLocalHost()));
};
char* serialize(bool es_json = false);
json_object* flow2json();
json_object* flow2es(json_object *flow_object);
inline u_int8_t getTcpFlags() { return(src2dst_tcp_flags | dst2src_tcp_flags); };
inline u_int8_t getTcpFlagsCli2Srv() { return(src2dst_tcp_flags); };
inline u_int8_t getTcpFlagsSrv2Cli() { return(dst2src_tcp_flags); };
#ifdef NTOPNG_PRO
bool checkPassVerdict(const struct tm *now);
inline bool isPassVerdict() { return passVerdict; };
#endif
inline void setDropVerdict() { passVerdict = false; };
void incFlowDroppedCounters();
u_int32_t getPid(bool client);
u_int32_t getFatherPid(bool client);
char* get_username(bool client);
char* get_proc_name(bool client);
u_int32_t getNextTcpSeq(u_int8_t tcpFlags, u_int32_t tcpSeqNum, u_int32_t payloadLen) ;
double toMs(const struct timeval *t);
void timeval_diff(struct timeval *begin, const struct timeval *end, struct timeval *result, u_short divide_by_two);
char* getFlowInfo();
inline char* getFlowServerInfo() {
return (isSSL() && protos.ssl.certificate) ? protos.ssl.certificate : host_server_name;
}
inline char* getBitTorrentHash() { return(bt_hash); };
inline void setBTHash(char *h) { if(!h) return; if(bt_hash) { free(bt_hash); bt_hash = NULL; }; bt_hash = strdup(h); }
inline void setServerName(char *v) { if(host_server_name) free(host_server_name); host_server_name = strdup(v); }
void updateTcpFlags(const struct bpf_timeval *when,
u_int8_t flags, bool src2dst_direction);
void incTcpBadStats(bool src2dst_direction,
u_int32_t ooo_pkts, u_int32_t retr_pkts, u_int32_t lost_pkts);
void updateTcpSeqNum(const struct bpf_timeval *when,
u_int32_t seq_num, u_int32_t ack_seq_num,
u_int16_t window, u_int8_t flags,
u_int16_t payload_len, bool src2dst_direction);
void updateSeqNum(time_t when, u_int32_t sN, u_int32_t aN);
void processDetectedProtocol();
void setDetectedProtocol(ndpi_protocol proto_id, bool forceDetection);
void setJSONInfo(const char *json);
bool isFlowPeer(char *numIP, u_int16_t vlanId);
void incStats(bool cli2srv_direction, u_int pkt_len,
u_int8_t *payload, u_int payload_len, u_int8_t l4_proto,
const struct timeval *when);
void addFlowStats(bool cli2srv_direction, u_int in_pkts, u_int in_bytes, u_int in_goodput_bytes,
u_int out_pkts, u_int out_bytes, u_int out_goodput_bytes, time_t last_seen);
inline bool isDetectionCompleted() { return(detection_completed); };
inline struct ndpi_flow_struct* get_ndpi_flow() { return(ndpiFlow); };
inline void* get_cli_id() { return(cli_id); };
inline void* get_srv_id() { return(srv_id); };
inline u_int32_t get_cli_ipv4() { return(cli_host->get_ip()->get_ipv4()); };
inline u_int32_t get_srv_ipv4() { return(srv_host->get_ip()->get_ipv4()); };
inline struct ndpi_in6_addr* get_cli_ipv6() { return(cli_host->get_ip()->get_ipv6()); };
inline struct ndpi_in6_addr* get_srv_ipv6() { return(srv_host->get_ip()->get_ipv6()); };
inline u_int16_t get_cli_port() { return(ntohs(cli_port)); };
inline u_int16_t get_srv_port() { return(ntohs(srv_port)); };
inline u_int16_t get_vlan_id() { return(vlanId); };
inline u_int8_t get_protocol() { return(protocol); };
inline u_int64_t get_bytes() { return(cli2srv_bytes+srv2cli_bytes); };
inline u_int64_t get_bytes_cli2srv() { return(cli2srv_bytes); };
inline u_int64_t get_bytes_srv2cli() { return(srv2cli_bytes); };
inline u_int64_t get_goodput_bytes() { return(cli2srv_goodput_bytes+srv2cli_goodput_bytes); };
inline u_int64_t get_packets() { return(cli2srv_packets+srv2cli_packets); };
inline u_int64_t get_packets_cli2srv() { return(cli2srv_packets); };
inline u_int64_t get_packets_srv2cli() { return(srv2cli_packets); };
inline u_int64_t get_partial_bytes() { return(get_bytes() - (last_db_dump.cli2srv_bytes+last_db_dump.srv2cli_bytes)); };
inline u_int64_t get_partial_bytes_cli2srv() { return(cli2srv_bytes - last_db_dump.cli2srv_bytes); };
inline u_int64_t get_partial_bytes_srv2cli() { return(srv2cli_bytes - last_db_dump.srv2cli_bytes); };
inline u_int64_t get_partial_packets_cli2srv() { return(cli2srv_packets - last_db_dump.cli2srv_packets); };
inline u_int64_t get_partial_packets_srv2cli() { return(srv2cli_packets - last_db_dump.srv2cli_packets); };
inline u_int64_t get_partial_goodput_bytes() { return(get_goodput_bytes() - (last_db_dump.cli2srv_goodput_bytes+last_db_dump.srv2cli_goodput_bytes)); };
inline u_int64_t get_partial_packets() { return(get_packets() - (last_db_dump.cli2srv_packets+last_db_dump.srv2cli_packets)); };
inline float get_bytes_thpt() { return(bytes_thpt); };
inline float get_goodput_bytes_thpt() { return(goodput_bytes_thpt); };
inline time_t get_partial_first_seen() { return(last_db_dump.last_dump == 0 ? get_first_seen() : last_db_dump.last_dump); };
inline time_t get_partial_last_seen() { return(get_last_seen()); };
inline u_int32_t get_duration() { return((u_int32_t)(get_last_seen()-get_first_seen())); };
inline char* get_protocol_name() { return(Utils::l4proto2name(protocol)); };
inline ndpi_protocol get_detected_protocol() { return(ndpiDetectedProtocol); };
void fixAggregatedFlowFields();
inline ndpi_protocol_category_t get_detected_protocol_category() { return ndpi_get_proto_category(iface->get_ndpi_struct(), ndpiDetectedProtocol); };
inline Host* get_cli_host() { return(cli_host); };
inline Host* get_srv_host() { return(srv_host); };
inline char* get_json_info() { return(json_info); };
inline ndpi_protocol_breed_t get_protocol_breed() { return(ndpi_get_proto_breed(iface->get_ndpi_struct(), ndpiDetectedProtocol.app_protocol)); };
inline char* get_protocol_breed_name() { return(ndpi_get_proto_breed_name(iface->get_ndpi_struct(),
ndpi_get_proto_breed(iface->get_ndpi_struct(),
ndpiDetectedProtocol.app_protocol))); };
char* get_detected_protocol_name(char *buf, u_int buf_len) {
return(ndpi_protocol2name(iface->get_ndpi_struct(), ndpiDetectedProtocol, buf, buf_len));
}
u_int32_t get_packetsLost();
u_int32_t get_packetsRetr();
u_int32_t get_packetsOOO();
u_int64_t get_current_bytes_cli2srv();
u_int64_t get_current_bytes_srv2cli();
u_int64_t get_current_goodput_bytes_cli2srv();
u_int64_t get_current_goodput_bytes_srv2cli();
u_int64_t get_current_packets_cli2srv();
u_int64_t get_current_packets_srv2cli();
void handle_process(ProcessInfo *pinfo, bool client_process);
inline bool idle() { return(false); } /* Idle flows are checked in Flow::update_hosts_stats */
bool isReadyToPurge();
inline bool is_l7_protocol_guessed() { return(l7_protocol_guessed); };
char* print(char *buf, u_int buf_len);
void update_hosts_stats(struct timeval *tv);
#ifdef NTOPNG_PRO
void update_pools_stats(const struct timeval *tv,
u_int64_t diff_sent_packets, u_int64_t diff_sent_bytes,
u_int64_t diff_rcvd_packets, u_int64_t diff_rcvd_bytes);
#endif
u_int32_t key();
static u_int32_t key(Host *cli, u_int16_t cli_port,
Host *srv, u_int16_t srv_port,
u_int16_t vlan_id,
u_int16_t protocol);
void lua(lua_State* vm, AddressTree * ptree, DetailsLevel details_level, bool asListElement);
bool equal(IpAddress *_cli_ip, IpAddress *_srv_ip,
u_int16_t _cli_port, u_int16_t _srv_port,
u_int16_t _vlanId, u_int8_t _protocol,
bool *src2srv_direction);
void sumStats(nDPIStats *stats);
void guessProtocol();
bool dumpFlow(bool idle_flow);
bool dumpFlowTraffic(void);
bool match(AddressTree *ptree);
inline Host* get_real_client() { return(cli2srv_direction ? cli_host : srv_host); }
inline Host* get_real_server() { return(cli2srv_direction ? srv_host : cli_host); }
inline bool isSuspiciousFlowThpt();
void dissectSSL(u_int8_t *payload, u_int16_t payload_len, const struct bpf_timeval *when, bool cli2srv);
void dissectHTTP(bool src2dst_direction, char *payload, u_int16_t payload_len);
void dissectSSDP(bool src2dst_direction, char *payload, u_int16_t payload_len);
void dissectMDNS(u_int8_t *payload, u_int16_t payload_len);
void dissectBittorrent(char *payload, u_int16_t payload_len);
void updateInterfaceLocalStats(bool src2dst_direction, u_int num_pkts, u_int pkt_len);
inline void setICMP(bool src2dst_direction, u_int8_t icmp_type, u_int8_t icmp_code, u_int8_t *icmpdata) {
if(isICMP()) {
protos.icmp.icmp_type = icmp_type, protos.icmp.icmp_code = icmp_code;
if(get_cli_host()) get_cli_host()->incICMP(icmp_type, icmp_code, src2dst_direction ? true : false, get_srv_host());
if(get_srv_host()) get_srv_host()->incICMP(icmp_type, icmp_code, src2dst_direction ? false : true, get_cli_host());
protos.icmp.icmp_echo_id = ntohs(*((u_int16_t*)&icmpdata[4]));
}
}
inline void getICMP(u_int8_t *_icmp_type, u_int8_t *_icmp_code, u_int16_t *_icmp_echo_id) {
*_icmp_type = protos.icmp.icmp_type, *_icmp_code = protos.icmp.icmp_code, *_icmp_echo_id = protos.icmp.icmp_echo_id;
}
inline char* getDNSQuery() { return(isDNS() ? protos.dns.last_query : (char*)""); }
inline void setDNSQuery(char *v) { if(isDNS()) { if(protos.dns.last_query) free(protos.dns.last_query); protos.dns.last_query = strdup(v); } }
inline char* getHTTPURL() { return(isHTTP() ? protos.http.last_url : (char*)""); }
inline void setHTTPURL(char *v) { if(isHTTP()) { if(protos.http.last_url) free(protos.http.last_url); protos.http.last_url = strdup(v); } }
inline char* getHTTPContentType() { return(isHTTP() ? protos.http.last_content_type : (char*)""); }
inline char* getSSLCertificate() { return(isSSL() ? protos.ssl.certificate : (char*)""); }
bool isSSLProto();
inline bool isSSLData() { return(isSSLProto() && good_ssl_hs && protos.ssl.is_data); }
inline bool isSSLHandshake() { return(isSSLProto() && good_ssl_hs && !protos.ssl.is_data); }
inline bool hasSSLHandshakeEnded() { return(getSSLEncryptionStatus() == SSL_ENCRYPTION_BOTH); }
FlowSSLEncryptionStatus getSSLEncryptionStatus();
void setDumpFlowTraffic(bool what) { dump_flow_traffic = what; }
bool getDumpFlowTraffic(void) { return dump_flow_traffic; }
#ifdef NTOPNG_PRO
#ifndef HAVE_NEDGE
inline void updateProfile() { trafficProfile = iface->getFlowProfile(this); }
inline char* get_profile_name() { return(trafficProfile ? trafficProfile->getName() : (char*)"");}
#endif
void updateFlowShapers();
void recheckQuota(const struct tm *now);
#endif
inline float getFlowRTT() { return(rttSec); }
/* http://bradhedlund.com/2008/12/19/how-to-calculate-tcp-throughput-for-long-distance-links/ */
inline float getCli2SrvMaxThpt() { return(rttSec ? ((float)(cli2srv_window*8)/rttSec) : 0); }
inline float getSrv2CliMaxThpt() { return(rttSec ? ((float)(srv2cli_window*8)/rttSec) : 0); }
inline u_int32_t getCli2SrvCurrentInterArrivalTime(time_t now) { return(getCurrentInterArrivalTime(now, true)); }
inline u_int32_t getSrv2CliCurrentInterArrivalTime(time_t now) { return(getCurrentInterArrivalTime(now, false)); }
inline u_int32_t getCli2SrvMinInterArrivalTime() { return(cli2srvStats.pktTime.min_ms); }
inline u_int32_t getCli2SrvMaxInterArrivalTime() { return(cli2srvStats.pktTime.max_ms); }
inline u_int32_t getCli2SrvAvgInterArrivalTime() { return((cli2srv_packets < 2) ? 0 : cli2srvStats.pktTime.total_delta_ms / (cli2srv_packets-1)); }
inline u_int32_t getSrv2CliMinInterArrivalTime() { return(srv2cliStats.pktTime.min_ms); }
inline u_int32_t getSrv2CliMaxInterArrivalTime() { return(srv2cliStats.pktTime.max_ms); }
inline u_int32_t getSrv2CliAvgInterArrivalTime() { return((srv2cli_packets < 2) ? 0 : srv2cliStats.pktTime.total_delta_ms / (srv2cli_packets-1)); }
bool isIdleFlow();
inline FlowState getFlowState() { return(state); }
inline bool isEstablished() { return state == flow_state_established; }
inline bool isFlowAlerted() { return(flow_alerted); }
inline void setFlowAlerted() { flow_alerted = true; }
inline void setVRFid(u_int32_t v) { vrfId = v; }
inline bool setFlowDevice(u_int32_t device_ip, u_int16_t inidx, u_int16_t outidx) {
if((flow_device.device_ip > 0 && flow_device.device_ip != device_ip)
|| (flow_device.in_index > 0 && flow_device.in_index != inidx)
|| (flow_device.out_index > 0 && flow_device.out_index != outidx))
return false;
if(device_ip) flow_device.device_ip = device_ip;
if(inidx) flow_device.in_index = inidx;
if(outidx) flow_device.out_index = outidx;
return true;
}
inline u_int32_t getFlowDeviceIp() { return flow_device.device_ip; };
inline u_int16_t getFlowDeviceInIndex() { return flow_device.in_index; };
inline u_int16_t getFlowDeviceOutIndex() { return flow_device.out_index; };
void setPacketsBytes(u_int32_t s2d_pkts, u_int32_t d2s_pkts, u_int32_t s2d_bytes, u_int32_t d2s_bytes);
#ifdef NTOPNG_PRO
void getFlowShapers(bool src2dst_direction, TrafficShaper **shaper_ingress, TrafficShaper **shaper_egress) {
if(src2dst_direction) {
*shaper_ingress = flowShaperIds.cli2srv.ingress,
*shaper_egress = flowShaperIds.cli2srv.egress;
} else {
*shaper_ingress = flowShaperIds.srv2cli.ingress,
*shaper_egress = flowShaperIds.srv2cli.egress;
}
}
inline u_int8_t getFlowRoutingTableId() { return(routing_table_id); }
inline void setIngress2EgressDirection(bool _ingress2egress) { ingress2egress_direction = _ingress2egress; }
inline bool isIngress2EgressDirection() { return(ingress2egress_direction); }
#endif
};
#endif /* _FLOW_H_ */
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