How to implement flooding for wired nodes (IP_BROADCAST usage)?
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How to implement flooding for wired nodes (IP_BROADCAST usage)?
by srupesh
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Hi,
I am a beginner for ns2. I want to test flooding in wired nodes. I went through the posts related to it but couldn't find the solution. There is a link related to this issue but there is no solution---> http://mailman.isi.edu/pipermail/ns-users/2006-January/053762.html is it possible to invoke user defined recv() method implicitly after calling Connector::send()?? anybody please give the information for this problem?? I am posting both C++ code and tcl code here.. I defined a new packet header here...... #ifndef BCAST_PKT_H_ #define BCAST_PKT_H_ #include <packet.h> #include <config.h> #define HDR_BCAST_PKT(p) hdr_bcast_pkt::access(p) struct hdr_bcast_pkt { nsaddr_t pkt_src_; // Node which originated this packet u_int16_t pkt_len_; // Packet length (in bytes) u_int8_t pkt_seq_num_; // Packet sequence number inline nsaddr_t& pkt_src() { return pkt_src_; } inline u_int16_t& pkt_len() { return pkt_len_; } inline u_int8_t& pkt_seq_num() { return pkt_seq_num_; } static int offset_; inline static int& offset() { return offset_; } inline static hdr_bcast_pkt* access(const Packet* p) { return (hdr_bcast_pkt*)p->access(offset_); } }; #endif /*BCAST_PKT_H_*/ implementation of IP_BROADCAST---- int hdr_bcast_pkt::offset_ ; class MyAgent : public Agent{ public : MyAgent(); protected : int command(int argc,const char*const* argv); private: //int my_var1; //double my_var2; nsaddr_t ra_addr_; void my_func(void); void my_bcast(Packet *p); void recv(Packet* pkt, Handler*); }; static class bcastHeaderClass : public PacketHeaderClass { public: bcastHeaderClass() : PacketHeaderClass("PacketHeader/bcast", sizeof(hdr_bcast_pkt)) { bind_offset(&hdr_bcast_pkt::offset_); } } class_bcast_hdr; static class MyAgentClass : public TclClass { public : MyAgentClass() : TclClass("Agent/MyAgentOtcl") {} TclObject* create(int argc,const char*const* argv) { return (new MyAgent()); //(nsaddr_t)Address::instance().str2addr(argv[4]) } } class_my_agent; MyAgent::MyAgent() : Agent(PT_bcast) { //nsaddr_t id //bind("my_var1_otcl",&my_var1); //bind("my_var2_otcl",&my_var2); //ra_addr_ = id; } int MyAgent::command(int argc,const char*const* argv) { if(argc == 2) { if(strcmp(argv[1],"callmyfunc") == 0) { my_func(); return (TCL_OK); } if(strcmp(argv[1],"sendpkt") == 0) { Packet* newpkt = allocpkt(); //some packet configuration my_bcast(newpkt); //recv(newpkt,0); return (TCL_OK); } } return (Agent::command(argc,argv)); } void MyAgent::my_func(void) { Tcl& tcl = Tcl::instance(); tcl.eval("puts \"Message from my_func\""); //tcl.evalf("puts \" my_var1= %d\"",my_var1); //tcl.evalf("puts \" my_var2 = %f\"",my_var2); } void MyAgent::my_bcast(Packet *p) { hdr_cmn* hdrcmn = HDR_CMN(p); hdr_ip* iphdr = HDR_IP(p); hdr_bcast_pkt* ph = HDR_BCAST_PKT(p); //ph ->pkt_src_ = ra_addr_; ph ->pkt_len_ = 64; // set all the necessary things for the common header hdrcmn ->size_ = IP_HDR_LEN + ph->pkt_len(); hdrcmn ->ptype_ = PT_bcast; hdrcmn->next_hop_ = IP_BROADCAST; hdrcmn->prev_hop_ = this->addr(); hdrcmn->direction() = hdr_cmn::DOWN; hdrcmn ->size_ = IP_HDR_LEN + ph->pkt_len(); hdrcmn ->ptype_ = PT_bcast; // setting the ip header iphdr->saddr() = this->addr(); iphdr->sport() = 254; // 1-254 iphdr->daddr() = IP_BROADCAST; iphdr->dport() = 254; // 1-254 iphdr->ttl() = 32; //Scheduler::instance().schedule(target_, p, 0.0); send(p,0); Tcl& tcl = Tcl::instance(); tcl.eval("puts \"Message from my_bcast()\""); } void MyAgent::recv(Packet* pkt, Handler*) { Tcl& tcl = Tcl::instance(); tcl.eval("puts \"1Message from recv()\""); hdr_cmn* hdrcmn = HDR_CMN(pkt); //Access the common header for the received packet: hdr_ip* hdrip = HDR_IP(pkt); // Access the IP header for the received packet: cout << "node " << this->addr() << "received from node " << hdrcmn->prev_hop_; tcl.eval("puts \"2Message from recv()\""); } Front end Tcl code : set ns [new Simulator] set n0 [$ns node] set n1 [$ns node] $ns duplex-link $n0 $n1 1Mb 10ms DropTail set a0 [new Agent/MyAgentOtcl] $ns attach-agent $n0 $a0 set a1 [new Agent/MyAgentOtcl] $ns attach-agent $n1 $a1 #$ns connect $a0 $a1 #set myagent [new Agent/MyAgentOtcl] $a0 set my_var1_otcl 2 $a0 set my_var2_otcl 3.14 $a0 callmyfunc $a0 sendpkt I am getting the error: Message from my_func --- Classfier::no-slot{} default handler (tcl/lib/ns-lib.tcl) --- _o12: no target for slot -1 _o12 type: Classifier/Hash/Dest content dump: classifier _o12 0 offset 0 shift 2147483647 mask 1 slots slot 0: _o29 (Classifier/Port) -1 default ---------- Finished standard no-slot{} default handler ---------- Regards Siva Rupesh |
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Re: How to implement flooding for wired nodes (IP_BROADCAST usage)?
by feel2chat
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there is an example script: /ns-allinone-2.32/ns-2.32/tcl/ex/flooding.tcl On Sun, Apr 6, 2008 at 12:00 AM, srupesh <rupesh.ns2@...> wrote: > > > Hi, > > I am a beginner for ns2. I want to test flooding in wired nodes. I > went through the posts related to it but couldn't find the solution. > There is a link related to this issue but there is no solution---> > > http://mailman.isi.edu/pipermail/ns-users/2006-January/053762.html > > is it possible to invoke user defined recv() method implicitly after calling > Connector::send()?? > > anybody please give the information for this problem?? > > I am posting both C++ code and tcl code here.. > > I defined a new packet header here...... > > #ifndef BCAST_PKT_H_ > #define BCAST_PKT_H_ > > #include <packet.h> > #include <config.h> > > #define HDR_BCAST_PKT(p) hdr_bcast_pkt::access(p) > struct hdr_bcast_pkt { > > nsaddr_t pkt_src_; // Node which originated this packet > u_int16_t pkt_len_; // Packet length (in bytes) > u_int8_t pkt_seq_num_; // Packet sequence number > > inline nsaddr_t& pkt_src() { return pkt_src_; } > inline u_int16_t& pkt_len() { return pkt_len_; } > inline u_int8_t& pkt_seq_num() { return pkt_seq_num_; } > > static int offset_; > inline static int& offset() { return offset_; } > inline static hdr_bcast_pkt* access(const Packet* p) { > return (hdr_bcast_pkt*)p->access(offset_); > } > > }; > > > > #endif /*BCAST_PKT_H_*/ > > implementation of IP_BROADCAST---- > > int hdr_bcast_pkt::offset_ ; > class MyAgent : public Agent{ > public : > MyAgent(); > protected : > int command(int argc,const char*const* argv); > private: > //int my_var1; > //double my_var2; > nsaddr_t ra_addr_; > void my_func(void); > void my_bcast(Packet *p); > void recv(Packet* pkt, Handler*); > }; > static class bcastHeaderClass : public PacketHeaderClass { > public: > bcastHeaderClass() : PacketHeaderClass("PacketHeader/bcast", > sizeof(hdr_bcast_pkt)) { > bind_offset(&hdr_bcast_pkt::offset_); > } > } class_bcast_hdr; > > static class MyAgentClass : public TclClass { > public : > MyAgentClass() : TclClass("Agent/MyAgentOtcl") {} > TclObject* create(int argc,const char*const* argv) { > return (new MyAgent()); //(nsaddr_t)Address::instance().str2addr(argv[4]) > } > } class_my_agent; > > MyAgent::MyAgent() : Agent(PT_bcast) { //nsaddr_t id > //bind("my_var1_otcl",&my_var1); > //bind("my_var2_otcl",&my_var2); > //ra_addr_ = id; > > } > > int MyAgent::command(int argc,const char*const* argv) { > > if(argc == 2) { > if(strcmp(argv[1],"callmyfunc") == 0) { > my_func(); > return (TCL_OK); > > } > if(strcmp(argv[1],"sendpkt") == 0) { > Packet* newpkt = allocpkt(); > //some packet configuration > my_bcast(newpkt); > //recv(newpkt,0); > return (TCL_OK); > } > } > > return (Agent::command(argc,argv)); > } > > void MyAgent::my_func(void) { > Tcl& tcl = Tcl::instance(); > tcl.eval("puts \"Message from my_func\""); > //tcl.evalf("puts \" my_var1= %d\"",my_var1); > //tcl.evalf("puts \" my_var2 = %f\"",my_var2); > > } > > > > void MyAgent::my_bcast(Packet *p) > { > hdr_cmn* hdrcmn = HDR_CMN(p); > hdr_ip* iphdr = HDR_IP(p); > hdr_bcast_pkt* ph = HDR_BCAST_PKT(p); > > //ph ->pkt_src_ = ra_addr_; > ph ->pkt_len_ = 64; > // set all the necessary things for the common header > hdrcmn ->size_ = IP_HDR_LEN + ph->pkt_len(); > hdrcmn ->ptype_ = PT_bcast; > hdrcmn->next_hop_ = IP_BROADCAST; > hdrcmn->prev_hop_ = this->addr(); > hdrcmn->direction() = hdr_cmn::DOWN; > hdrcmn ->size_ = IP_HDR_LEN + ph->pkt_len(); > hdrcmn ->ptype_ = PT_bcast; > // setting the ip header > iphdr->saddr() = this->addr(); > iphdr->sport() = 254; // 1-254 > iphdr->daddr() = IP_BROADCAST; > iphdr->dport() = 254; // 1-254 > iphdr->ttl() = 32; > //Scheduler::instance().schedule(target_, p, 0.0); > send(p,0); > Tcl& tcl = Tcl::instance(); > tcl.eval("puts \"Message from my_bcast()\""); > } > > > void MyAgent::recv(Packet* pkt, Handler*) > { > Tcl& tcl = Tcl::instance(); > tcl.eval("puts \"1Message from recv()\""); > hdr_cmn* hdrcmn = HDR_CMN(pkt); //Access the common header for the received > packet: > hdr_ip* hdrip = HDR_IP(pkt); // Access the IP header for the received > packet: > cout << "node " << this->addr() << "received from node " << > hdrcmn->prev_hop_; > > tcl.eval("puts \"2Message from recv()\""); > } > > > Front end Tcl code : > > set ns [new Simulator] > > set n0 [$ns node] > set n1 [$ns node] > $ns duplex-link $n0 $n1 1Mb 10ms DropTail > > set a0 [new Agent/MyAgentOtcl] > $ns attach-agent $n0 $a0 > set a1 [new Agent/MyAgentOtcl] > $ns attach-agent $n1 $a1 > > #$ns connect $a0 $a1 > > #set myagent [new Agent/MyAgentOtcl] > $a0 set my_var1_otcl 2 > $a0 set my_var2_otcl 3.14 > > $a0 callmyfunc > > $a0 sendpkt > > I am getting the error: > > Message from my_func > --- Classfier::no-slot{} default handler (tcl/lib/ns-lib.tcl) --- > _o12: no target for slot -1 > _o12 type: Classifier/Hash/Dest > content dump: > classifier _o12 > 0 offset > 0 shift > 2147483647 mask > 1 slots > slot 0: _o29 (Classifier/Port) > -1 default > ---------- Finished standard no-slot{} default handler ---------- > > > Regards > Siva Rupesh > -- > View this message in context: http://www.nabble.com/How-to-implement-flooding-for-wired-nodes-%28IP_BROADCAST-usage%29--tp16519096p16519096.html > Sent from the ns-users mailing list archive at Nabble.com. > > |
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Re: How to implement flooding for wired nodes (IP_BROADCAST usage)?
by srupesh
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hi,
thank you for the response... But I want to send my own created packet to the neighbors in the first phase.Then I want to send the packet by embedding extra field in my created packet to the selected neighbors through Distance vector routing . Now ,the example script ~/ns2.32/tcl/ex/flooding.tcl is running by sending predefined packet.....only.. 1.Is there any backend C++ source code for this script to modify the packet??? 2.Is it possible to use already defined DVR implementation in ns2 simulator to get the routing table information to be used in my C++ source code??? or Should I write my own DVR again to get the desired routing table (which is definitely time taking!!) 3.I am repeating the question for clarity which is in the last post ---> Is it possible to invoke user defined recv() method implicitly after calling Connector::send()?? Please anybody provide feedback for my questions....I am trying hard to find the solutions for these in the mailing lists.. Thank You Rupesh
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