Hi guys, thanks for the feedback. Alysson,
The Agent PBC is a broadcast but is only ping, I tested it before and is no good for me. I dont understand this agent Flooding at all, I need to use it? Are you saying the only way to broadcast is to use one of those agents? My way is wrong? Another question, Is possible the follow scenario? : one node(n1) broadcasting and two another(n2 and n3) nodes as a cbr traffic flow like n2 ---> n3 and n3 receiving the broadcasting packets of n1 and the traffic of n2? Thank you! 2012/5/2 Alysson Oliveira <lssn.olive...@gmail.com> > Hi, > > You can see it on ns-2.34/tcl/ex/wireless-flooding.tcl and > ns-2.34/tcl/ex/802.11/broadcast_validation.tcl witch uses a specific > broadcast agent. > > Further details in ns-2.34/common/packet.h on lines 676 and 677: > init(p); // Initialize bits_[] > (HDR_CMN(p))->next_hop_ = -2; // -1 reserved for IP_BROADCAST > (HDR_CMN(p))->last_hop_ = -2; // -1 reserved for IP_BROADCAST > > Regards, > Alysson Oliveira > > > 2012/5/2, Frank Wetzels <frank.wetz...@cwi.nl>: > > > > Hi, > > > > I have no solution for you in NS2. However, I have a remark on your > > address/port choice. > > I guess that by choosing -1, you fill the address field with > 255.255.255.255 > > as IP address > > in dotted decimal notation? The port number choice of 0 is a bit strange. > > Although you are using IP broadcast > > you - strictly speaking - still need a legitimate port number. Indeed, > you > > choose a particular protocol by choosing > > the port address. As an example, DHCP uses IP broadcast initially based > on > > UDP67 / UDP68. > > > > Regards, > > Frank > > > > On May 1, 2012, at 5:36 AM, Paulo Robson S. F. wrote: > > > >> > >> Hi, > >> > >> I want to broadcast a packet using an udp agent. I found some solutions > >> at > >> this maillist but > >> neither satisfactory. > >> > >> I just want to send broadcast packet from 1 node to another 2 nodes in > >> his > >> range. My idea was > >> change the dst ip to -1 and dst port to 0 because i saw somewhere that > is > >> the way to broadcast. > >> > >> I'm using the 802.11Ext model of MAC, the new module of the NS 2.34 > >> > >> Well, I made this way: > >> > >> set udp0 [new Agent/UDP] > >> $ns attach-agent $node $udp0 > >> set cbr2 [new Application/Traffic/CBR] > >> > >> $cbr2 set packetSize_ 128 > >> $cbr2 set interval_ 0.015 > >> $cbr2 set random_ 1 > >> $cbr2 set maxpkts_ 1000 > >> > >> $cbr2 attach-agent $udp0 > >> > >> #to broadcast i used this: > >> $udp0 set dst_addr_ -1 > >> $udp0 set dst_port_ 0 > >> > >> In the trace file seems to be right, but i dont know if only this change > >> of > >> address and port of destination > >> is indeed a broadcast to all neighbors. > >> > >> First lines of trace file: > >> s 0.500000000 _2_ AGT --- 0 cbr 128 [0 0 0 0] ------- [2:0 -1:0 32 0] > >> [0] > >> 0 0 > >> r 0.500000000 _2_ RTR --- 0 cbr 128 [0 0 0 0] ------- [2:0 -1:0 32 0] > >> [0] > >> 0 0 > >> s 0.500000000 _2_ RTR --- 0 cbr 148 [0 0 0 0] ------- [2:0 -1:0 32 0] > >> [0] > >> 0 0 > >> s 0.500025000 _2_ MAC --- 0 cbr 176 [0 ffffffff 2 0] ------- [2:0 -1:0 > >> 32 > >> 0] [0] 0 0 > >> r 0.500546664 _1_ MAC --- 0 cbr 148 [0 ffffffff 2 0] ------- [2:0 -1:0 > >> 32 > >> 0] [0] 1 0 > >> r 0.500546841 _0_ MAC --- 0 cbr 148 [0 ffffffff 2 0] ------- [2:0 -1:0 > >> 32 > >> 0] [0] 1 0 > >> r 0.500571664 _1_ RTR --- 0 cbr 148 [0 ffffffff 2 0] ------- [2:0 -1:0 > >> 32 > >> 0] [0] 1 0 > >> r 0.500571664 _1_ AGT --- 0 cbr 148 [0 ffffffff 2 0] ------- [2:0 -1:0 > >> 31 > >> 0] [0] 1 0 > >> r 0.500571841 _0_ RTR --- 0 cbr 148 [0 ffffffff 2 0] ------- [2:0 -1:0 > >> 32 > >> 0] [0] 1 0 > >> r 0.500571841 _0_ AGT --- 0 cbr 148 [0 ffffffff 2 0] ------- [2:0 -1:0 > >> 31 > >> 0] [0] 1 0 > >> s 0.507505094 _2_ AGT --- 1 cbr 128 [0 0 0 0] ------- [2:0 -1:0 32 0] > >> [1] > >> 0 0 > >> r 0.507505094 _2_ RTR --- 1 cbr 128 [0 0 0 0] ------- [2:0 -1:0 32 0] > >> [1] > >> 0 0 > >> s 0.507505094 _2_ RTR --- 1 cbr 148 [0 0 0 0] ------- [2:0 -1:0 32 0] > >> [1] > >> 0 0 > >> s 0.507530094 _2_ MAC --- 1 cbr 176 [0 ffffffff 2 0] ------- [2:0 -1:0 > >> 32 > >> 0] [1] 0 0 > >> r 0.508051758 _1_ MAC --- 1 cbr 148 [0 ffffffff 2 0] ------- [2:0 -1:0 > >> 32 > >> 0] [1] 1 0 > >> r 0.508051934 _0_ MAC --- 1 cbr 148 [0 ffffffff 2 0] ------- [2:0 -1:0 > >> 32 > >> 0] [1] 1 0 > >> r 0.508076758 _1_ RTR --- 1 cbr 148 [0 ffffffff 2 0] ------- [2:0 -1:0 > >> 32 > >> 0] [1] 1 0 > >> r 0.508076758 _1_ AGT --- 1 cbr 148 [0 ffffffff 2 0] ------- [2:0 -1:0 > >> 31 > >> 0] [1] 1 0 > >> r 0.508076934 _0_ RTR --- 1 cbr 148 [0 ffffffff 2 0] ------- [2:0 -1:0 > >> 32 > >> 0] [1] 1 0 > >> r 0.508076934 _0_ AGT --- 1 cbr 148 [0 ffffffff 2 0] ------- [2:0 -1:0 > >> 31 > >> 0] [1] 1 0 > >> > >> > >> Thanks guys > >> > >> > >> Att, > >> > >> -- > >> Paulo Robson SF > >> Computação UFC > >> Semestre VII > > > > > > > > > -- > Alysson Oliveira > -- Paulo Robson SF Computação UFC Semestre VII
