Class: Scriptroute::Tulip::Train2

Inherits:
Object
  • Object
show all
Defined in:
lib/scriptroute/tulip/helper.rb

Overview

train2 ##############

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(dsts, numpackets, intratrain, types, ttls, psizes, numtrains, intertrain) ⇒ Train2

Returns a new instance of Train2.



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# File 'lib/scriptroute/tulip/helper.rb', line 475

def initialize(dsts, numpackets, intratrain, types, ttls, psizes, numtrains, intertrain) 
  @dsts, @numpackets, @intratrain, @types, @ttls, @psizes, @numtrains, @intertrain = 
    dsts, numpackets, intratrain,   types,  ttls,  psizes,  numtrains,  intertrain;
  @reverse_ttls, @rem_srcs, @num_losses, @packets = Hash.new(), Hash.new(), Array.new(), Array.new();

  ##forget the MAX_TRAIN complication for this part;

  delayedPackets = Array.new();
  (0..@numtrains-1).each { |i|
    delay = (i==0)? 0 : intertrain;
    (0..@numpackets-1).each { |j|
	probe = getProbe(i,j);
	#puts "#{i} #{delay}\n";
	delayedPackets.push(Struct::DelayedPacket.new(delay, probe));
	delay = intratrain;
	delay = (j==@numpackets-2)? 0.003 : 0.0005;
    }
  }
  @responsesPackets = Scriptroute::send_train(delayedPackets);

  ##check sanity of the train and insert it into @packets and @num_losses
  (0..@numtrains-1).each { |i|
    @packets[i] = Array.new();
    @num_losses[i] = 0;
    (0..@numpackets-1).each  { |j|
	index = i*@numpackets + j;
	pkt = @responsesPackets[index];
	@packets[i].push(pkt);

	dst = (@dsts[j])? @dsts[j] : @dsts[0];
	ttl = (@ttls[j])? @ttls[j] : @ttls[0];
	key = "#{dst}::#{ttl}";
	if (!@reverse_ttls[key]) 
 @reverse_ttls[key] = Hash.new(0);
 @rem_srcs[key] = Hash.new(0);
	end

	if (pkt) 
 if (pkt.probe and pkt.probe.time)
   if (pkt.response)
     rttl = pkt.response.packet.ip_ttl;
     src = pkt.response.packet.ip_src;
     @reverse_ttls[key][rttl] += 1;
     @rem_srcs[key][src] += 1;
   else
     @num_losses[i]+=1;
   end
   ##check the probe sort order
   npkt = @responsesPackets[index+1];
   if (npkt and npkt.probe and npkt.probe.time and pkt.probe.time > npkt.probe.time) 
     STDERR.puts "ERROR: packets not in probe sorted order. \n%s %d %.3f\n%s %d %.3f\n" % 
[pkt.probe.packet.ip_dst, pkt.probe.packet.ip_ttl, pkt.probe.time.to_f*1000, 
npkt.probe.packet.ip_dst, npkt.probe.packet.ip_ttl, npkt.probe.time.to_f*1000];
   end
 end
	else
 raise "ERROR: there are null responses\n";
	end
    }
  }
  
  @reverse_ttls.each_key { |key| 
    if (@reverse_ttls[key].keys.length > 1) 
	puts "WARNING: too many reverse TTLs for #{key}. #{@reverse_ttls[key].keys.join(" ")} #{@reverse_ttls[key].values.join(" ")} ";
    end
    
    if (@rem_srcs[key].keys.length > 1) 
	puts "WARNING: too many sources. #{@rem_srcs[key].keys.join(" ")} #{@rem_srcs[key].values.join(" ")} ";
    end
  }
	
end

Instance Attribute Details

#dsts ⇒ Object (readonly)

Returns the value of attribute dsts.



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# File 'lib/scriptroute/tulip/helper.rb', line 436

def dsts
  @dsts
end

#intertrain ⇒ Object (readonly)

Returns the value of attribute intertrain.



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# File 'lib/scriptroute/tulip/helper.rb', line 436

def intertrain
  @intertrain
end

#intratrain ⇒ Object (readonly)

Returns the value of attribute intratrain.



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# File 'lib/scriptroute/tulip/helper.rb', line 436

def intratrain
  @intratrain
end

#num_losses ⇒ Object (readonly)

Returns the value of attribute num_losses.



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# File 'lib/scriptroute/tulip/helper.rb', line 436

def num_losses
  @num_losses
end

#numpackets ⇒ Object (readonly)

Returns the value of attribute numpackets.



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# File 'lib/scriptroute/tulip/helper.rb', line 436

def numpackets
  @numpackets
end

#numtrains ⇒ Object (readonly)

Returns the value of attribute numtrains.



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# File 'lib/scriptroute/tulip/helper.rb', line 436

def numtrains
  @numtrains
end

#packets ⇒ Object (readonly)

Returns the value of attribute packets.



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# File 'lib/scriptroute/tulip/helper.rb', line 436

def packets
  @packets
end

#psizes ⇒ Object (readonly)

Returns the value of attribute psizes.



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# File 'lib/scriptroute/tulip/helper.rb', line 436

def psizes
  @psizes
end

#reverse_ttls ⇒ Object (readonly)

Returns the value of attribute reverse_ttls.



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# File 'lib/scriptroute/tulip/helper.rb', line 436

def reverse_ttls
  @reverse_ttls
end

#ttls ⇒ Object (readonly)

Returns the value of attribute ttls.



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# File 'lib/scriptroute/tulip/helper.rb', line 436

def ttls
  @ttls
end

#types ⇒ Object (readonly)

Returns the value of attribute types.



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# File 'lib/scriptroute/tulip/helper.rb', line 436

def types
  @types
end

Instance Method Details

#getProbe(i, j) ⇒ Object 



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# File 'lib/scriptroute/tulip/helper.rb', line 438

def getProbe (i,j)
  dst = (@dsts[j])? @dsts[j] : @dsts[0];
  ttl = (@ttls[j])? @ttls[j] : @ttls[0];
  type = (@types[j])? @types[j] : @types[0];
  psize = (@psizes[j])? @psizes[j] : @psizes[0];
  
  probe = nil;
  case type
  when "udp"
    psize = (psize==-1)? 12 : psize;
    probe = Scriptroute::UDP.new(psize);
    probe.uh_dport = 33444;
  when "tcp"
    psize = (psize==-1)? 0 : psize;
    probe = Scriptroute::TCP.new(psize);
    probe.th_dport=80;
    probe.th_win=1024;
  else # "echo" or "tstamp"
    psize = (psize==-1)? 0 : psize;
    probe = Scriptroute::ICMP.new(psize);
    if (type == "echo")
	probe.icmp_type = Scriptroute::ICMP::ICMP_ECHO;
    elsif (type == "tstamp")
	probe.icmp_type = Scriptroute::ICMP::ICMP_TSTAMP;
    else 
	raise "ERROR: unsupported packettype #{i} #{j} #{type}\n";
    end
    probe.icmp_code = 0;
    probe.icmp_seq = i*numpackets + j;
  end	
  probe.ip_ttl = ttl;
  probe.ip_dst = dst;
  
  return probe;
end

#simple_to_s ⇒ Object 



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# File 'lib/scriptroute/tulip/helper.rb', line 570

def simple_to_s
  str = "";
  (0..@numtrains-1).each { |i|
    (0..@numpackets-1).each { |j| 
	pr = @packets[i][j];
	src = (pr.response)? pr.response.packet.ip_src : -1;
	stime = pr.probe.time.to_f * 1000;
	ipid = (pr.response)? pr.response.packet.ip_id : -1;
	str += "%.3f %d " %[stime, ipid];
    }
    str += "\n";
  }
  return str;
end

#to_s ⇒ Object 



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# File 'lib/scriptroute/tulip/helper.rb', line 548

def to_s
  str = "train: #{@dsts} #{@numpackets} #{@intratrain} (#{@types}) (#{@ttls})\n";
  (0..@numtrains-1).each { |i|
    str += "train #{i}\n";
    (0..@numpackets-1).each { |j| 
	pr = @packets[i][j];
	src = (pr.response)? pr.response.packet.ip_src : -1;
	srcid = pr.probe.packet.ip_id;
	stime = pr.probe.time.to_f * 1000;
	rtt = (pr.probe and pr.response) ? (pr.response.time - pr.probe.time) * 1000 : -1;
	ipid = (pr.response)? pr.response.packet.ip_id : -1;
	str += "#{src} %d %.3f %d " %[rtt, stime, ipid];
	if (@types[j] == "tstamp") then 
 rem_time =  (pr.response)? pr.response.packet.icmp_ttime : 0;
 str += "#{rem_time} ";
	end
    }
    str += "\n";
  }
  return str;
end