simulation end to end

3 files changed, 941 insertions, 0 deletions

diff --git a/src/sim/trex_sim.h b/src/sim/trex_sim.h
new file mode 100644
index 00000000..d997e2f5
--- /dev/null
+++ b/src/sim/trex_sim.h
@@ -0,0 +1,132 @@
+/*
+ Itay Marom
+ Cisco Systems, Inc.
+*/
+
+/*
+Copyright (c) 2015-2015 Cisco Systems, Inc.
+
+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 __TREX_SIM_H__
+#define __TREX_SIM_H__
+
+#include <string>
+#include <os_time.h>
+#include <bp_sim.h>
+
+int gtest_main(int argc, char **argv);
+
+class TrexStateless;
+class TrexPublisher;
+class DpToCpHandler;
+
+/**
+ * interface for a sim target
+ * 
+ */
+class SimInterface {
+public:
+
+    SimInterface() {
+
+        time_init();
+        CGlobalInfo::m_socket.Create(0);
+        CGlobalInfo::init_pools(1000);
+        assert( CMsgIns::Ins()->Create(4) );
+    }
+
+    virtual ~SimInterface() {
+
+        CMsgIns::Ins()->Free();
+        CGlobalInfo::free_pools();
+        CGlobalInfo::m_socket.Delete();
+    }
+
+
+};
+
+/**
+ * gtest target
+ * 
+ * @author imarom (28-Dec-15)
+ */
+class SimGtest : public SimInterface {
+public:
+
+    int run(int argc, char **argv) {
+        return gtest_main(argc, argv);
+    }
+};
+
+
+
+/**
+ * stateful target
+ * 
+ */
+class SimStateful : public SimInterface {
+
+public:
+    int run();
+};
+
+
+
+/**
+ * target for sim stateless
+ * 
+ * @author imarom (28-Dec-15)
+ */
+class SimStateless : public SimInterface {
+
+public:
+    static SimStateless& get_instance() {
+        static SimStateless instance;
+        return instance;
+    }
+
+    
+    int run(const std::string &json_filename, const std::string &out_filename);
+
+    TrexStateless * get_stateless_obj() {
+        return m_trex_stateless;
+    }
+
+    void set_verbose(bool enable) {
+        m_verbose = enable;
+    }
+
+private:
+    SimStateless();
+    ~SimStateless();
+
+    void prepare_control_plane();
+    void prepare_dataplane();
+    void execute_json(const std::string &json_filename);
+    void run_dp(const std::string &out_filename);
+    void flush_dp_to_cp_messages();
+
+    bool is_verbose() {
+        return m_verbose;
+    }
+
+    TrexStateless   *m_trex_stateless;
+    DpToCpHandler   *m_dp_to_cp_handler;
+    TrexPublisher   *m_publisher;
+    CFlowGenList     m_fl;
+    CErfIFStl        m_erf_vif;
+    bool             m_verbose;
+};
+
+#endif /* __TREX_SIM_H__ */
diff --git a/src/sim/trex_sim_stateful.cpp b/src/sim/trex_sim_stateful.cpp
new file mode 100644
index 00000000..35c17d6e
--- /dev/null
+++ b/src/sim/trex_sim_stateful.cpp
@@ -0,0 +1,599 @@
+/*
+ Itay Marom
+ Cisco Systems, Inc.
+*/
+
+/*
+Copyright (c) 2015-2015 Cisco Systems, Inc.
+
+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.
+*/
+
+#include "trex_sim.h"
+
+static int cores = 1;
+
+#ifdef LINUX
+
+
+
+#include <pthread.h>
+
+struct per_thread_t {
+    pthread_t  tid;
+};
+
+#define MAX_THREADS 200
+static per_thread_t  tr_info[MAX_THREADS];
+
+
+//////////////
+
+struct test_t_info1 {
+    CPreviewMode *            preview_info;
+    CFlowGenListPerThread   * thread_info;
+    uint32_t                  thread_id;
+};
+
+void * thread_task(void *info){
+
+    test_t_info1 * obj =(test_t_info1 *)info;
+
+    CFlowGenListPerThread   * lpt=obj->thread_info;
+
+    printf("start thread %d \n",obj->thread_id);
+    //delay(obj->thread_id *3000);
+    printf("-->start thread %d \n",obj->thread_id);
+    if (1/*obj->thread_id ==3*/) {
+
+        char buf[100];
+        sprintf(buf,"my%d.erf",obj->thread_id);
+        lpt->start_generate_stateful(buf,*obj->preview_info);
+        lpt->m_node_gen.DumpHist(stdout);
+        printf("end thread %d \n",obj->thread_id);
+    }
+
+    return (NULL);
+}
+
+
+void test_load_list_of_cap_files_linux(CParserOption * op){
+
+    CFlowGenList fl;
+    //CNullIF erf_vif;
+    //CErfIF erf_vif;
+
+    fl.Create();
+
+    fl.load_from_yaml(op->cfg_file,cores);
+    fl.DumpPktSize();
+
+    
+    fl.generate_p_thread_info(cores);
+    CFlowGenListPerThread   * lpt;
+
+    /* set the ERF file */
+    //fl.set_vif_all(&erf_vif);
+
+    int i;
+    for (i=0; i<cores; i++) {
+        lpt=fl.m_threads_info[i];
+        test_t_info1 * obj = new test_t_info1();
+        obj->preview_info =&op->preview;
+        obj->thread_info  = fl.m_threads_info[i];
+        obj->thread_id    = i;
+        CNullIF * erf_vif = new CNullIF();
+        //CErfIF  * erf_vif = new CErfIF();
+
+        lpt->set_vif(erf_vif);
+
+        assert(pthread_create( &tr_info[i].tid, NULL, thread_task, obj)==0);
+    }
+
+    for (i=0; i<cores; i++) {
+        /* wait for all of them to stop */
+       assert(pthread_join((pthread_t)tr_info[i].tid,NULL )==0);
+    }
+
+    printf("compare files \n");
+    for (i=1; i<cores; i++) {
+
+        CErfCmp cmp;
+        char buf[100];
+        sprintf(buf,"my%d.erf",i);
+        char buf1[100];
+        sprintf(buf1,"my%d.erf",0);
+        if ( cmp.compare(std::string(buf),std::string(buf1)) != true ) {
+            printf(" ERROR cap file is not ex !! \n");
+            assert(0);
+        }
+        printf(" thread %d is ok \n",i);
+    }
+
+    fl.Delete();
+}
+
+
+#endif
+
+/*************************************************************/
+void test_load_list_of_cap_files(CParserOption * op){
+
+    CFlowGenList fl;
+    CNullIF erf_vif;
+
+    fl.Create();
+
+    #define NUM 1
+
+    fl.load_from_yaml(op->cfg_file,NUM);
+    fl.DumpPktSize();
+    
+    
+    fl.generate_p_thread_info(NUM);
+    CFlowGenListPerThread   * lpt;
+
+    /* set the ERF file */
+    //fl.set_vif_all(&erf_vif);
+
+    int i;
+    for (i=0; i<NUM; i++) {
+        lpt=fl.m_threads_info[i];
+        char buf[100];
+        sprintf(buf,"my%d.erf",i);
+        lpt->start_generate_stateful(buf,op->preview);
+        lpt->m_node_gen.DumpHist(stdout);
+    }
+    //sprintf(buf,"my%d.erf",7);
+    //lpt=fl.m_threads_info[7];
+
+    //fl.Dump(stdout);
+    fl.Delete();
+}
+
+int load_list_of_cap_files(CParserOption * op){
+    CFlowGenList fl;
+    fl.Create();
+    fl.load_from_yaml(op->cfg_file,1);
+    if ( op->preview.getVMode() >0 ) {
+        fl.DumpCsv(stdout);
+    }
+    uint32_t start=    os_get_time_msec();
+
+    CErfIF erf_vif;
+    //CNullIF erf_vif;
+
+    fl.generate_p_thread_info(1);
+    CFlowGenListPerThread   * lpt;
+    lpt=fl.m_threads_info[0];
+    lpt->set_vif(&erf_vif);
+
+    if ( (op->preview.getVMode() >1)  || op->preview.getFileWrite() ) {
+        lpt->start_generate_stateful(op->out_file,op->preview);
+    }
+
+    lpt->m_node_gen.DumpHist(stdout);
+
+    uint32_t stop=    os_get_time_msec();
+    printf(" d time = %ul %ul \n",stop-start,os_get_time_freq());
+    fl.Delete();
+    return (0);
+}
+
+
+int test_dns(){
+
+    time_init();
+    CGlobalInfo::init_pools(1000);
+
+    CParserOption po ;
+
+    //po.cfg_file = "cap2/dns.yaml";
+    //po.cfg_file = "cap2/sfr3.yaml";
+    po.cfg_file = "cap2/sfr.yaml";
+
+    po.preview.setVMode(0);
+    po.preview.setFileWrite(true);
+    #ifdef LINUX
+      test_load_list_of_cap_files_linux(&po);
+    #else
+      test_load_list_of_cap_files(&po);
+    #endif
+    return (0);
+}
+
+void test_pkt_mbuf(void);
+
+void test_compare_files(void);
+
+#if 0
+static int b=0;
+static int c=0;
+static int d=0;
+
+int test_instructions(){
+    int i;
+    for (i=0; i<100000;i++) {
+        b+=b+1;
+        c+=+b+c+1;
+        d+=+(b*2+1);
+    }
+    return (b+c+d);
+}
+
+#include <valgrind/callgrind.h>
+#endif
+
+
+void update_tcp_seq_num(CCapFileFlowInfo * obj,
+                        int pkt_id,
+                        int size_change){
+    CFlowPktInfo * pkt=obj->GetPacket(pkt_id);
+    if ( pkt->m_pkt_indication.m_desc.IsUdp() ){
+        /* nothing to do */
+        return;
+    }
+
+    bool o_init=pkt->m_pkt_indication.m_desc.IsInitSide();
+    TCPHeader * tcp ;
+    int s= (int)obj->Size();
+    int i;
+
+    for (i=pkt_id+1; i<s; i++) {
+
+        pkt=obj->GetPacket(i);
+        tcp=pkt->m_pkt_indication.l4.m_tcp;
+        bool init=pkt->m_pkt_indication.m_desc.IsInitSide();
+        if (init == o_init) {
+            /* same dir update the seq number */
+            tcp->setSeqNumber    (tcp->getSeqNumber    ()+size_change);
+
+        }else{
+            /* update the ack number */
+            tcp->setAckNumber    (tcp->getAckNumber    ()+size_change);
+        }
+    }
+}
+
+
+
+void change_pkt_len(CCapFileFlowInfo * obj,int pkt_id, int size ){
+    CFlowPktInfo * pkt=obj->GetPacket(pkt_id);
+
+    /* enlarge the packet size by 9 */
+
+    char * p=pkt->m_packet->append(size);
+    /* set it to 0xaa*/
+    memmove(p+size-4,p-4,4); /* CRCbytes */
+    memset(p-4,0x0a,size);
+
+    /* refresh the pointers */
+    pkt->m_pkt_indication.RefreshPointers();
+
+    IPHeader       * ipv4 = pkt->m_pkt_indication.l3.m_ipv4;
+    ipv4->updateTotalLength	(ipv4->getTotalLength()+size );
+
+    /* update seq numbers if needed */
+    update_tcp_seq_num(obj,pkt_id,size);
+}
+
+void dump_tcp_seq_num_(CCapFileFlowInfo * obj){
+    int s= (int)obj->Size();
+    int i;
+    uint32_t i_seq;
+    uint32_t r_seq;
+
+    CFlowPktInfo * pkt=obj->GetPacket(0);
+    TCPHeader * tcp = pkt->m_pkt_indication.l4.m_tcp;
+    i_seq=tcp->getSeqNumber    ();
+
+    pkt=obj->GetPacket(1);
+    tcp = pkt->m_pkt_indication.l4.m_tcp;
+    r_seq=tcp->getSeqNumber    ();
+
+    for (i=2; i<s; i++) {
+        uint32_t seq;
+        uint32_t ack;
+
+        pkt=obj->GetPacket(i);
+        tcp=pkt->m_pkt_indication.l4.m_tcp;
+        bool init=pkt->m_pkt_indication.m_desc.IsInitSide();
+        seq=tcp->getSeqNumber    ();
+        ack=tcp->getAckNumber    ();
+        if (init) {
+            seq=seq-i_seq;
+            ack=ack-r_seq;
+        }else{
+            seq=seq-r_seq;
+            ack=ack-i_seq;
+        }
+        printf(" %4d ",i);
+        if (!init) {
+            printf("                             ");
+        }
+        printf("  %s   seq: %4d   ack : %4d   \n",init?"I":"R",seq,ack);
+    }
+}
+
+
+int manipolate_capfile() {
+    time_init();
+    CGlobalInfo::init_pools(1000);
+
+    CCapFileFlowInfo flow_info;
+    flow_info.Create();
+
+    flow_info.load_cap_file("avl/delay_10_rtsp_0.pcap",0,0);
+
+    change_pkt_len(&flow_info,4-1 ,6);
+    change_pkt_len(&flow_info,5-1 ,6);
+    change_pkt_len(&flow_info,6-1 ,6+2);
+    change_pkt_len(&flow_info,7-1 ,4);
+    change_pkt_len(&flow_info,8-1 ,6+2);
+    change_pkt_len(&flow_info,9-1 ,4);
+    change_pkt_len(&flow_info,10-1,6);
+    change_pkt_len(&flow_info,13-1,6);
+    change_pkt_len(&flow_info,16-1,6);
+    change_pkt_len(&flow_info,19-1,6);
+
+    flow_info.save_to_erf("exp/c.pcap",1);
+    
+    return (1);
+}
+
+int manipolate_capfile_sip() {
+    time_init();
+    CGlobalInfo::init_pools(1000);
+
+    CCapFileFlowInfo flow_info;
+    flow_info.Create();
+
+    flow_info.load_cap_file("avl/delay_10_sip_0.pcap",0,0);
+
+    change_pkt_len(&flow_info,1-1 ,6+6);
+    change_pkt_len(&flow_info,2-1 ,6+6);
+
+    flow_info.save_to_erf("exp/delay_10_sip_0_fixed.pcap",1);
+    
+    return (1);
+}
+
+int manipolate_capfile_sip1() {
+    time_init();
+    CGlobalInfo::init_pools(1000);
+
+    CCapFileFlowInfo flow_info;
+    flow_info.Create();
+
+    flow_info.load_cap_file("avl/delay_sip_0.pcap",0,0);
+    flow_info.GetPacket(1);
+
+    change_pkt_len(&flow_info,1-1 ,6+6+10);
+
+    change_pkt_len(&flow_info,2-1 ,6+6+10);
+
+    flow_info.save_to_erf("exp/delay_sip_0_fixed_1.pcap",1);
+    
+    return (1);
+}
+
+
+class CMergeCapFileRec {
+public:
+
+    CCapFileFlowInfo m_cap;
+
+    int              m_index;
+    int              m_limit_number_of_packets; /* limit number of packets */
+    bool             m_stop; /* Do we have more packets */
+
+    double           m_offset; /* offset should be positive */
+    double           m_start_time;
+
+public:
+    bool Create(std::string cap_file,double offset);
+    void Delete();
+    void IncPacket();
+    bool GetCurPacket(double & time);
+    CPacketIndication *  GetUpdatedPacket();
+
+    void Dump(FILE *fd,int _id);
+};
+
+
+void CMergeCapFileRec::Dump(FILE *fd,int _id){
+    double time = 0.0;
+    bool stop=GetCurPacket(time);
+    fprintf (fd," id:%2d  stop : %d index:%4d  %3.4f \n",_id,stop?1:0,m_index,time);
+}
+
+
+CPacketIndication *  CMergeCapFileRec::GetUpdatedPacket(){
+    double t1;
+    assert(GetCurPacket(t1)==false);
+    CFlowPktInfo * pkt = m_cap.GetPacket(m_index);
+    pkt->m_pkt_indication.m_packet->set_new_time(t1);
+    return (&pkt->m_pkt_indication);
+}
+
+
+bool  CMergeCapFileRec::GetCurPacket(double & time){
+    if (m_stop) {
+        return(true);
+    }
+    CFlowPktInfo * pkt = m_cap.GetPacket(m_index);
+    time= (pkt->m_packet->get_time() -m_start_time + m_offset);
+    return (false);
+}
+
+void CMergeCapFileRec::IncPacket(){
+    m_index++;
+    if ( (m_limit_number_of_packets) && (m_index > m_limit_number_of_packets ) ) {
+        m_stop=true;
+        return;
+    }
+
+    if ( m_index == (int)m_cap.Size() ) {
+        m_stop=true;
+    }
+}
+
+void CMergeCapFileRec::Delete(){
+    m_cap.Delete();
+}
+
+bool CMergeCapFileRec::Create(std::string cap_file,
+                              double offset){
+   m_cap.Create();
+   m_cap.load_cap_file(cap_file,0,0);
+   CFlowPktInfo * pkt = m_cap.GetPacket(0);
+
+   m_index=0;
+   m_stop=false;
+   m_limit_number_of_packets =0;
+   m_start_time =     pkt->m_packet->get_time() ;
+   m_offset = offset;
+
+   return (true);
+}
+
+
+
+#define MERGE_CAP_FILES (2)
+
+class CMergeCapFile {
+public:
+    bool Create();
+    void Delete();
+    bool run_merge(std::string to_cap_file);
+private:
+    void append(int _cap_id);
+
+public:
+    CMergeCapFileRec m[MERGE_CAP_FILES];
+    CCapFileFlowInfo m_results;
+};
+
+bool CMergeCapFile::Create(){
+    m_results.Create();
+    return(true);
+}
+
+void CMergeCapFile::Delete(){
+    m_results.Delete();
+}
+
+void CMergeCapFile::append(int _cap_id){
+    CPacketIndication * lp=m[_cap_id].GetUpdatedPacket();
+    lp->m_packet->Dump(stdout,0);
+    m_results.Append(lp);
+}
+
+
+bool CMergeCapFile::run_merge(std::string to_cap_file){
+
+    int i=0;
+    int cnt=0;
+    while ( true ) {
+        int    min_index=0;
+        double min_time;
+
+        fprintf(stdout," --------------\n");
+        fprintf(stdout," pkt : %d \n",cnt);
+        for (i=0; i<MERGE_CAP_FILES; i++) {
+            m[i].Dump(stdout,i);
+        }
+        fprintf(stdout," --------------\n");
+
+        bool valid = false;
+        for (i=0; i<MERGE_CAP_FILES; i++) {
+            double t1;
+            if ( m[i].GetCurPacket(t1) == false ){
+                /* not in stop */
+                if (!valid) {
+                    min_time  = t1;
+                    min_index = i;
+                    valid=true;
+                }else{
+                    if (t1 < min_time) {
+                        min_time=t1;
+                        min_index = i;
+                    }
+                }
+
+            }
+        }
+
+        /* nothing to do */
+        if (valid==false) {
+            fprintf(stdout,"nothing to do \n");
+            break;
+        }
+
+        cnt++;
+        fprintf(stdout," choose id %d \n",min_index);
+        append(min_index);
+        m[min_index].IncPacket();
+    };
+
+    m_results.save_to_erf(to_cap_file,1);
+
+    return (true);
+}
+
+
+
+int merge_3_cap_files() {
+    time_init();
+    CGlobalInfo::init_pools(1000);
+
+    CMergeCapFile merger;
+    merger.Create();
+    merger.m[0].Create("exp/c.pcap",0.001);
+    merger.m[1].Create("avl/delay_10_rtp_160k_0.pcap",0.31);
+    merger.m[2].Create("avl/delay_10_rtp_160k_1.pcap",0.311);
+
+    //merger.m[1].Create("avl/delay_10_rtp_250k_0_0.pcap",0.31);
+    //merger.m[1].m_limit_number_of_packets =6;
+    //merger.m[2].Create("avl/delay_10_rtp_250k_1_0.pcap",0.311);
+    //merger.m[2].m_limit_number_of_packets =6;
+
+    merger.run_merge("exp/delay_10_rtp_160k_full.pcap");
+
+    return (0);
+}
+
+int merge_2_cap_files_sip() {
+    time_init();
+    CGlobalInfo::init_pools(1000);
+
+    CMergeCapFile merger;
+    merger.Create();
+    merger.m[0].Create("exp/delay_sip_0_fixed_1.pcap",0.001);
+    merger.m[1].Create("avl/delay_video_call_rtp_0.pcap",0.51);
+    //merger.m[1].m_limit_number_of_packets=7;
+
+    //merger.m[1].Create("avl/delay_10_rtp_250k_0_0.pcap",0.31);
+    //merger.m[1].m_limit_number_of_packets =6;
+    //merger.m[2].Create("avl/delay_10_rtp_250k_1_0.pcap",0.311);
+    //merger.m[2].m_limit_number_of_packets =6;
+
+    merger.run_merge("avl/delay_10_sip_video_call_full.pcap");
+
+    return (0);
+}
+
+int
+SimStateful::run() {
+    return load_list_of_cap_files(&CGlobalInfo::m_options);
+}
diff --git a/src/sim/trex_sim_stateless.cpp b/src/sim/trex_sim_stateless.cpp
new file mode 100644
index 00000000..dd81a591
--- /dev/null
+++ b/src/sim/trex_sim_stateless.cpp
@@ -0,0 +1,210 @@
+/*
+ Itay Marom
+ Cisco Systems, Inc.
+*/
+
+/*
+Copyright (c) 2015-2015 Cisco Systems, Inc.
+
+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.
+*/
+
+#include "trex_sim.h"
+#include <trex_stateless.h>
+#include <trex_stateless_messaging.h>
+#include <trex_rpc_cmd_api.h>
+#include <json/json.h>
+
+using namespace std;
+
+TrexStateless * get_stateless_obj() {
+    return SimStateless::get_instance().get_stateless_obj();
+}
+
+
+/**
+ * handler for DP to CP messages
+ * 
+ * @author imarom (19-Nov-15)
+ */
+class DpToCpHandler {
+public:
+    virtual void handle(TrexStatelessDpToCpMsgBase *msg) = 0;
+};
+
+/************************ 
+ * 
+ *  stateless sim object
+ *  
+************************/
+class SimPublisher : public TrexPublisher {
+public:
+
+    /* override create */
+    bool Create(uint16_t port, bool disable) {
+        return true;
+    }
+
+    void Delete() {
+
+    }
+
+    void publish_json(const std::string &s) {
+    }
+
+    virtual ~SimPublisher() {
+    }
+};
+
+/************************ 
+ * 
+ *  stateless sim object
+ *  
+************************/
+
+SimStateless::SimStateless() {
+    m_trex_stateless    = NULL;
+    m_publisher         = NULL;
+    m_dp_to_cp_handler  = NULL;
+    m_verbose           = false;
+
+    /* override ownership checks */
+    TrexRpcCommand::test_set_override_ownership(true);
+}
+
+
+int
+SimStateless::run(const string &json_filename, const string &out_filename) {
+    prepare_dataplane();
+    prepare_control_plane();
+
+    execute_json(json_filename);
+    run_dp(out_filename);
+
+    flush_dp_to_cp_messages();
+
+    return 0;
+}
+
+
+SimStateless::~SimStateless() {
+    if (m_trex_stateless) {
+        delete m_trex_stateless;
+        m_trex_stateless = NULL;
+    }
+
+    if (m_publisher) {
+        delete m_publisher;
+        m_publisher = NULL;
+    }
+
+    m_fl.Delete();
+}
+
+/**
+ * prepare control plane for test
+ * 
+ * @author imarom (28-Dec-15)
+ */
+void
+SimStateless::prepare_control_plane() {
+    TrexStatelessCfg cfg;
+    
+    m_publisher = new SimPublisher();
+
+    TrexRpcServerConfig rpc_req_resp_cfg(TrexRpcServerConfig::RPC_PROT_MOCK, 0);
+
+    cfg.m_port_count         = 4;
+    cfg.m_rpc_req_resp_cfg   = &rpc_req_resp_cfg;
+    cfg.m_rpc_async_cfg      = NULL;
+    cfg.m_rpc_server_verbose = false;
+    cfg.m_platform_api       = new TrexMockPlatformApi();
+    cfg.m_publisher          = m_publisher;
+
+    m_trex_stateless = new TrexStateless(cfg);
+
+    m_trex_stateless->launch_control_plane();
+
+    for (auto &port : m_trex_stateless->get_port_list()) {
+        port->acquire("test", 0, true);
+    }
+
+}
+
+
+/**
+ * prepare the data plane for test
+ * 
+ */
+void
+SimStateless::prepare_dataplane() {
+    
+    m_fl.Create();
+    m_fl.generate_p_thread_info(1);
+    m_fl.m_threads_info[0]->set_vif(&m_erf_vif);
+}
+
+
+
+void
+SimStateless::execute_json(const std::string &json_filename) {
+
+    std::ifstream test(json_filename);
+    std::stringstream buffer;
+    buffer << test.rdbuf();
+
+    std::string rep = m_trex_stateless->get_rpc_server()->test_inject_request(buffer.str());
+
+    Json::Value root;
+    Json::Reader reader;
+    reader.parse(rep, root, false);
+
+    if (is_verbose()) {
+        std::cout << "server response: \n\n" << root << "\n\n";
+    }
+}
+
+void
+SimStateless::run_dp(const std::string &out_filename) {
+
+    CFlowGenListPerThread *lpt = m_fl.m_threads_info[0];
+    
+    lpt->start_stateless_simulation_file((std::string)out_filename, CGlobalInfo::m_options.preview);
+    lpt->start_stateless_daemon_simulation();
+
+    flush_dp_to_cp_messages();
+
+    std::cout << "\nwritten " << lpt->m_node_gen.m_cnt << " packets " << "to '" << out_filename << "'\n\n";
+}
+
+void
+SimStateless::flush_dp_to_cp_messages() {
+
+    CNodeRing *ring = CMsgIns::Ins()->getCpDp()->getRingDpToCp(0);
+
+    while ( true ) {
+        CGenNode * node = NULL;
+        if (ring->Dequeue(node) != 0) {
+            break;
+        }
+        assert(node);
+
+        TrexStatelessDpToCpMsgBase * msg = (TrexStatelessDpToCpMsgBase *)node;
+        if (m_dp_to_cp_handler) {
+            m_dp_to_cp_handler->handle(msg);
+        }
+
+        delete msg;
+    }
+
+}