source/netvis.cpp

   1 /* $Id$
   2
   3 This file is part of NetVis
   4 Copyright @ 2008 Mikko Rasa, Mikkosoft Productions
   5 Distributed unter the GPL
   6 */
   7
   8 #include <iostream>
   9 #include <signal.h>
  10 #include <netinet/ip.h>
  11 #include <netinet/tcp.h>
  12 #include <netinet/udp.h>
  13 #include <linux/if_ether.h>
  14 #include <msp/core/except.h>
  15 #include <msp/debug/profilingscope.h>
  16 #include <msp/gl/immediate.h>
  17 #include <msp/gl/matrix.h>
  18 #include <msp/gl/misc.h>
  19 #include <msp/gl/projection.h>
  20 #include <msp/gl/texture2d.h>
  21 #include <msp/gl/transform.h>
  22 #include <msp/strings/formatter.h>
  23 #include <msp/time/units.h>
  24 #include <msp/time/utils.h>
  25 #include "host.h"
  26 #include "netvis.h"
  27 #include "packet.h"
  28 #include "resolver.h"
  29
  30 using namespace std;
  31 using namespace Msp;
  32
  33 NetVis::NetVis(int argc, char **argv):
  34         draw_labels(true),
  35         blend(true),
  36         frames(0)
  37 {
  38         if(argc<2)
  39                 throw UsageError("No interface given");
  40         iface=argv[1];
  41 }
  42
  43 int NetVis::main()
  44 {
  45         char err[1024];
  46         pcap=pcap_open_live(iface.c_str(), 128, true, 0, err);
  47         if(!pcap)
  48                 throw Exception(err);
  49
  50         if(pcap_setnonblock(pcap, true, err)==-1)
  51                 throw Exception(err);
  52
  53         pcap_lookupnet(iface.c_str(), &localnet, &localnet_mask, err);
  54         localnet=ntohl(localnet);
  55         localnet_mask=ntohl(localnet_mask);
  56
  57         dpy=new Graphics::Display;
  58         wnd=new Graphics::Window(*dpy, 1024, 768);
  59         glc=new Graphics::GLContext(*wnd);
  60         wnd->set_title("NetVis");
  61         wnd->signal_close.connect(sigc::bind(sigc::mem_fun(this, &NetVis::exit), 0));
  62         wnd->signal_key_press.connect(sigc::mem_fun(this, &NetVis::key_press));
  63         wnd->show();
  64
  65         GL::enable(GL_BLEND);
  66         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  67
  68         font=new GL::Font;
  69         DataFile::load(*font, "dejavu-10.font");
  70         font_tex=new GL::Texture2D;
  71         DataFile::load(*font_tex, "dejavu-10.tex");
  72         font->set_texture(*font_tex);
  73
  74         catch_signal(SIGINT);
  75
  76         resolver=new Resolver;
  77
  78         //set_loop_mode(TICK_BUSY);
  79
  80         Application::main();
  81
  82         delete resolver;
  83
  84         delete glc;
  85         delete wnd;
  86         delete dpy;
  87
  88         cout<<hosts.size()+disabled_hosts.size()<<" different hosts seen\n";
  89         cout<<"capture: "<<profiler.scope("capture").total_time<<'\n';
  90         cout<<"tick:    "<<profiler.scope("tick").total_time<<'\n';
  91         cout<<"render:  "<<profiler.scope("render").total_time<<'\n';
  92
  93         return exit_code;
  94 }
  95
  96 void NetVis::tick()
  97 {
  98         Msp::Time::TimeStamp t=Msp::Time::now();
  99         Msp::Time::TimeDelta dt;
 100         if(tick_t)
 101                 dt=t-tick_t;
 102         tick_t=t;
 103
 104         if(tick_t>fps_t+Msp::Time::sec)
 105         {
 106                 fps=frames/((tick_t-fps_t)/Msp::Time::sec);
 107                 fps_t=tick_t;
 108                 frames=0;
 109         }
 110
 111         dpy->tick();
 112
 113         {
 114                 Debug::ProfilingScope s(profiler, "capture");
 115                 while(pcap_dispatch(pcap, -1, &capture_handler, reinterpret_cast<unsigned char *>(this))>0);
 116         }
 117
 118         {
 119                 Debug::ProfilingScope s(profiler, "tick");
 120
 121                 resolver->tick();
 122
 123                 float min_activity=1e7f;
 124                 for(map<unsigned, Host *>::iterator i=hosts.begin(); i!=hosts.end(); ++i)
 125                 {
 126                         i->second->tick(dt);
 127                         min_activity=min(min_activity, i->second->get_activity());
 128                 }
 129                 for(map<unsigned, Host *>::iterator i=disabled_hosts.begin(); i!=disabled_hosts.end(); ++i)
 130                         i->second->tick(dt);
 131
 132                 for(map<unsigned, Host *>::iterator i=disabled_hosts.begin(); i!=disabled_hosts.end();)
 133                 {
 134                         if(i->second->get_activity()>min_activity)
 135                         {
 136                                 i->second->set_active(true);
 137                                 hosts.insert(*i);
 138                                 disabled_hosts.erase(i++);
 139                         }
 140                         else
 141                                 ++i;
 142                 }
 143                 if(hosts.size()>20)
 144                 {
 145                         list<float> activity;
 146                         for(map<unsigned, Host *>::iterator i=hosts.begin(); i!=hosts.end(); ++i)
 147                                 activity.push_back(i->second->get_activity());
 148                         activity.sort();
 149
 150                         list<float>::iterator j=activity.begin();
 151                         advance(j, activity.size()-20);
 152                         float limit=*j;
 153
 154                         for(map<unsigned, Host *>::iterator i=hosts.begin(); i!=hosts.end();)
 155                         {
 156                                 if(i->second->get_activity()<limit)
 157                                 {
 158                                         i->second->set_active(false);
 159                                         disabled_hosts.insert(*i);
 160                                         hosts.erase(i++);
 161                                 }
 162                                 else
 163                                         ++i;
 164                         }
 165                 }
 166
 167                 for(list<Packet *>::iterator i=packets.begin(); i!=packets.end();)
 168                 {
 169                         (*i)->tick(dt);
 170                         if((*i)->get_stale())
 171                         {
 172                                 delete *i;
 173                                 i=packets.erase(i);
 174                         }
 175                         else
 176                                 ++i;
 177                 }
 178         }
 179
 180         {
 181                 Debug::ProfilingScope s(profiler, "render");
 182                 glClear(GL_COLOR_BUFFER_BIT);
 183
 184                 GL::matrix_mode(GL::PROJECTION);
 185                 GL::load_identity();
 186                 GL::ortho_centered(1024, 768);
 187                 GL::matrix_mode(GL::MODELVIEW);
 188                 GL::load_identity();
 189
 190                 for(map<unsigned, Host *>::iterator i=hosts.begin(); i!=hosts.end(); ++i)
 191                         i->second->render();
 192                 if(draw_labels)
 193                 {
 194                         glColor4f(1.0, 1.0, 1.0, 1.0);
 195                         for(map<unsigned, Host *>::iterator i=hosts.begin(); i!=hosts.end(); ++i)
 196                                 i->second->render_label();
 197                         GL::Texture::unbind();
 198                 }
 199                 GL::Immediate imm((GL::COLOR4_UBYTE, GL::VERTEX2));
 200                 imm.begin(GL::QUADS);
 201                 for(list<Packet *>::iterator i=packets.begin(); i!=packets.end(); ++i)
 202                         (*i)->render(imm);
 203                 imm.end();
 204
 205                 GL::push_matrix();
 206                 GL::translate(-500, 360, 0);
 207                 unsigned n=0;
 208                 for(map<unsigned, GL::Color>::iterator i=port_colors.begin(); (i!=port_colors.end() && n<20); ++i, ++n)
 209                 {
 210                         GL::Color &color=i->second;
 211
 212                         imm.begin(GL::QUADS);
 213                         imm.color(color.r, color.g, color.b, color.a);
 214                         for(unsigned x=0; x<=4; x+=2)
 215                         {
 216                                 imm.vertex(x+0, 0);
 217                                 imm.vertex(x+10, 0);
 218                                 imm.vertex(x+10, 10);
 219                                 imm.vertex(x+0, 10);
 220                         }
 221                         imm.end();
 222
 223                         GL::translate(0, -12, 0);
 224                 }
 225                 GL::pop_matrix();
 226
 227                 GL::push_matrix();
 228                 if(draw_labels)
 229                 {
 230                         GL::push_matrix();
 231                         GL::translate(-484, 361, 0);
 232                         GL::scale_uniform(10);
 233                         glColor4f(1.0, 1.0, 1.0, 1.0);
 234                         n=0;
 235                         for(map<unsigned, GL::Color>::iterator i=port_colors.begin(); (i!=port_colors.end() && n<20); ++i, ++n)
 236                         {
 237                                 font->draw_string(format("%d", i->first));
 238
 239                                 GL::translate(0, -1.2, 0);
 240                         }
 241                         GL::pop_matrix();
 242                         GL::Texture::unbind();
 243                 }
 244                 GL::pop_matrix();
 245
 246                 GL::push_matrix();
 247                 GL::translate(-500, -360, 0);
 248                 GL::scale_uniform(10);
 249                 font->draw_string(format("%d hosts", hosts.size()+disabled_hosts.size()));
 250                 GL::translate(0, -1.2, 0);
 251                 font->draw_string(format("%.2f fps", fps));
 252                 GL::pop_matrix();
 253                 GL::Texture::unbind();
 254
 255                 glc->swap_buffers();
 256         }
 257
 258         ++frames;
 259 }
 260
 261 Host &NetVis::get_host(unsigned a)
 262 {
 263         map<unsigned, Host *>::iterator i=hosts.find(a);
 264         if(i!=hosts.end())
 265                 return *i->second;
 266
 267         i=disabled_hosts.find(a);
 268         if(i!=disabled_hosts.end())
 269                 return *i->second;
 270
 271         Host *host=new Host(*this, a);
 272         if((a&localnet_mask)==localnet)
 273                 host->set_local(true);
 274         resolver->push(host);
 275         host->set_position(Vector2(rand()*400.0/RAND_MAX-200.0, rand()*400.0/RAND_MAX-200.0));
 276         hosts[a]=host;
 277         return *host;
 278 }
 279
 280 GL::Color &NetVis::get_port_color(unsigned port)
 281 {
 282         map<unsigned, GL::Color>::iterator i=port_colors.find(port);
 283         if(i!=port_colors.end())
 284                 return i->second;
 285
 286         GL::Color color;
 287         while(1)
 288         {
 289                 color.r=rand()*1.0/RAND_MAX;
 290                 color.g=rand()*1.0/RAND_MAX;
 291                 color.b=rand()*1.0/RAND_MAX;
 292                 if(color.r>0.5 || color.g>0.5 || color.b>0.7)
 293                         break;
 294         }
 295         color.a=0.4f;
 296         return port_colors[port]=color;
 297 }
 298
 299 void NetVis::key_press(unsigned key, unsigned, wchar_t)
 300 {
 301         if(key==46)
 302                 draw_labels=!draw_labels;
 303         else if(key==56)
 304         {
 305                 blend=!blend;
 306                 GL::set(GL_BLEND, blend);
 307         }
 308 }
 309
 310 void NetVis::capture_handler(unsigned char *user, const pcap_pkthdr *, const unsigned char *data)
 311 {
 312         NetVis *self=reinterpret_cast<NetVis *>(user);
 313
 314         const ethhdr *eth=reinterpret_cast<const ethhdr *>(data);
 315         if(ntohs(eth->h_proto)==ETH_P_IP)
 316         {
 317                 const iphdr *ip=reinterpret_cast<const iphdr *>(eth+1);
 318
 319                 unsigned size=ntohs(ip->tot_len);
 320                 unsigned port=0;
 321                 if(ip->protocol==IPPROTO_TCP)
 322                 {
 323                         const tcphdr *tcp=reinterpret_cast<const tcphdr *>(ip+1);
 324                         port=min(ntohs(tcp->source), ntohs(tcp->dest));
 325                 }
 326                 else if(ip->protocol==IPPROTO_UDP)
 327                 {
 328                         const udphdr *udp=reinterpret_cast<const udphdr *>(ip+1);
 329                         port=min(ntohs(udp->source), ntohs(udp->dest));
 330                 }
 331                 Host &shost=self->get_host(ntohl(ip->saddr));
 332                 Host *dhost=0;
 333                 if((ntohl(ip->daddr)&0xFF)!=0xFF)
 334                         dhost=&self->get_host(ntohl(ip->daddr));
 335
 336                 float throttle=shost.send_packet();
 337                 if(throttle<1)
 338                 {
 339                         self->packets.push_back(new Packet(shost, dhost, self->get_port_color(port), size));
 340                         self->packets.back()->tick(-throttle*Msp::Time::sec);
 341                 }
 342
 343                 shost.add_activity(size);
 344                 if(dhost)
 345                         dhost->add_activity(size);
 346         }
 347 }
 348
 349 void NetVis::sighandler(int)
 350 {
 351         exit(0);
 352 }
 353
 354 Application::RegApp<NetVis> NetVis::reg;