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 font;
  85         delete font_tex;
  86         delete glc;
  87         delete wnd;
  88         delete dpy;
  89
  90         cout<<hosts.size()+disabled_hosts.size()<<" different hosts seen\n";
  91         cout<<"capture: "<<profiler.scope("capture").total_time<<'\n';
  92         cout<<"tick:    "<<profiler.scope("tick").total_time<<'\n';
  93         cout<<"render:  "<<profiler.scope("render").total_time<<'\n';
  94
  95         pcap_close(pcap);
  96         for(map<unsigned, Host *>::iterator i=hosts.begin(); i!=hosts.end(); ++i)
  97                 delete i->second;
  98         for(map<unsigned, Host *>::iterator i=disabled_hosts.begin(); i!=disabled_hosts.end(); ++i)
  99                 delete i->second;
 100         for(list<Packet *>::iterator i=packets.begin(); i!=packets.end(); ++i)
 101                 delete *i;
 102
 103         return exit_code;
 104 }
 105
 106 void NetVis::tick()
 107 {
 108         Msp::Time::TimeStamp t=Msp::Time::now();
 109         Msp::Time::TimeDelta dt;
 110         if(tick_t)
 111                 dt=t-tick_t;
 112         tick_t=t;
 113
 114         if(tick_t>fps_t+Msp::Time::sec)
 115         {
 116                 fps=frames/((tick_t-fps_t)/Msp::Time::sec);
 117                 fps_t=tick_t;
 118                 frames=0;
 119         }
 120
 121         dpy->tick();
 122
 123         {
 124                 Debug::ProfilingScope s(profiler, "capture");
 125                 while(pcap_dispatch(pcap, -1, &capture_handler, reinterpret_cast<unsigned char *>(this))>0);
 126         }
 127
 128         {
 129                 Debug::ProfilingScope s(profiler, "tick");
 130
 131                 resolver->tick();
 132
 133                 float min_activity=1e7f;
 134                 for(map<unsigned, Host *>::iterator i=hosts.begin(); i!=hosts.end(); ++i)
 135                 {
 136                         i->second->tick(dt);
 137                         min_activity=min(min_activity, i->second->get_activity());
 138                 }
 139                 for(map<unsigned, Host *>::iterator i=disabled_hosts.begin(); i!=disabled_hosts.end(); ++i)
 140                         i->second->tick(dt);
 141
 142                 for(map<unsigned, Host *>::iterator i=disabled_hosts.begin(); i!=disabled_hosts.end();)
 143                 {
 144                         if(i->second->get_activity()>min_activity)
 145                         {
 146                                 i->second->set_active(true);
 147                                 hosts.insert(*i);
 148                                 disabled_hosts.erase(i++);
 149                         }
 150                         else
 151                                 ++i;
 152                 }
 153                 if(hosts.size()>20)
 154                 {
 155                         list<float> activity;
 156                         for(map<unsigned, Host *>::iterator i=hosts.begin(); i!=hosts.end(); ++i)
 157                                 activity.push_back(i->second->get_activity());
 158                         activity.sort();
 159
 160                         list<float>::iterator j=activity.begin();
 161                         advance(j, activity.size()-20);
 162                         float limit=*j;
 163
 164                         for(map<unsigned, Host *>::iterator i=hosts.begin(); i!=hosts.end();)
 165                         {
 166                                 if(i->second->get_activity()<limit)
 167                                 {
 168                                         i->second->set_active(false);
 169                                         disabled_hosts.insert(*i);
 170                                         hosts.erase(i++);
 171                                 }
 172                                 else
 173                                         ++i;
 174                         }
 175                 }
 176
 177                 for(list<Packet *>::iterator i=packets.begin(); i!=packets.end();)
 178                 {
 179                         (*i)->tick(dt);
 180                         if((*i)->get_stale())
 181                         {
 182                                 delete *i;
 183                                 i=packets.erase(i);
 184                         }
 185                         else
 186                                 ++i;
 187                 }
 188         }
 189
 190         {
 191                 Debug::ProfilingScope s(profiler, "render");
 192                 glClear(GL_COLOR_BUFFER_BIT);
 193
 194                 GL::matrix_mode(GL::PROJECTION);
 195                 GL::load_identity();
 196                 GL::ortho_centered(1024, 768);
 197                 GL::matrix_mode(GL::MODELVIEW);
 198                 GL::load_identity();
 199
 200                 for(map<unsigned, Host *>::iterator i=hosts.begin(); i!=hosts.end(); ++i)
 201                         i->second->render();
 202                 if(draw_labels)
 203                 {
 204                         glColor4f(1.0, 1.0, 1.0, 1.0);
 205                         for(map<unsigned, Host *>::iterator i=hosts.begin(); i!=hosts.end(); ++i)
 206                                 i->second->render_label();
 207                         GL::Texture::unbind();
 208                 }
 209                 GL::Immediate imm((GL::COLOR4_UBYTE, GL::VERTEX2));
 210                 imm.begin(GL::QUADS);
 211                 for(list<Packet *>::iterator i=packets.begin(); i!=packets.end(); ++i)
 212                         (*i)->render(imm);
 213                 imm.end();
 214
 215                 GL::push_matrix();
 216                 GL::translate(-500, 360, 0);
 217                 unsigned n=0;
 218                 for(map<unsigned, GL::Color>::iterator i=port_colors.begin(); (i!=port_colors.end() && n<20); ++i, ++n)
 219                 {
 220                         GL::Color &color=i->second;
 221
 222                         imm.begin(GL::QUADS);
 223                         imm.color(color.r, color.g, color.b, color.a);
 224                         for(unsigned x=0; x<=4; x+=2)
 225                         {
 226                                 imm.vertex(x+0, 0);
 227                                 imm.vertex(x+10, 0);
 228                                 imm.vertex(x+10, 10);
 229                                 imm.vertex(x+0, 10);
 230                         }
 231                         imm.end();
 232
 233                         GL::translate(0, -12, 0);
 234                 }
 235                 GL::pop_matrix();
 236
 237                 GL::push_matrix();
 238                 if(draw_labels)
 239                 {
 240                         GL::push_matrix();
 241                         GL::translate(-484, 361, 0);
 242                         GL::scale_uniform(10);
 243                         glColor4f(1.0, 1.0, 1.0, 1.0);
 244                         n=0;
 245                         for(map<unsigned, GL::Color>::iterator i=port_colors.begin(); (i!=port_colors.end() && n<20); ++i, ++n)
 246                         {
 247                                 font->draw_string(format("%d", i->first));
 248
 249                                 GL::translate(0, -1.2, 0);
 250                         }
 251                         GL::pop_matrix();
 252                         GL::Texture::unbind();
 253                 }
 254                 GL::pop_matrix();
 255
 256                 GL::push_matrix();
 257                 GL::translate(-500, -360, 0);
 258                 GL::scale_uniform(10);
 259                 font->draw_string(format("%d hosts", hosts.size()+disabled_hosts.size()));
 260                 GL::translate(0, -1.2, 0);
 261                 font->draw_string(format("%.2f fps", fps));
 262                 GL::pop_matrix();
 263                 GL::Texture::unbind();
 264
 265                 glc->swap_buffers();
 266         }
 267
 268         ++frames;
 269 }
 270
 271 Host &NetVis::get_host(unsigned a)
 272 {
 273         map<unsigned, Host *>::iterator i=hosts.find(a);
 274         if(i!=hosts.end())
 275                 return *i->second;
 276
 277         i=disabled_hosts.find(a);
 278         if(i!=disabled_hosts.end())
 279                 return *i->second;
 280
 281         Host *host=new Host(*this, a);
 282         if((a&localnet_mask)==localnet)
 283                 host->set_local(true);
 284         resolver->push(host);
 285         host->set_position(Vector2(rand()*400.0/RAND_MAX-200.0, rand()*400.0/RAND_MAX-200.0));
 286         hosts[a]=host;
 287         return *host;
 288 }
 289
 290 GL::Color &NetVis::get_port_color(unsigned port)
 291 {
 292         map<unsigned, GL::Color>::iterator i=port_colors.find(port);
 293         if(i!=port_colors.end())
 294                 return i->second;
 295
 296         GL::Color color;
 297         while(1)
 298         {
 299                 color.r=rand()*1.0/RAND_MAX;
 300                 color.g=rand()*1.0/RAND_MAX;
 301                 color.b=rand()*1.0/RAND_MAX;
 302                 if(color.r>0.5 || color.g>0.5 || color.b>0.7)
 303                         break;
 304         }
 305         color.a=0.4f;
 306         return port_colors[port]=color;
 307 }
 308
 309 void NetVis::key_press(unsigned key, unsigned, wchar_t)
 310 {
 311         if(key==46)
 312                 draw_labels=!draw_labels;
 313         else if(key==56)
 314         {
 315                 blend=!blend;
 316                 GL::set(GL_BLEND, blend);
 317         }
 318 }
 319
 320 void NetVis::capture_handler(unsigned char *user, const pcap_pkthdr *, const unsigned char *data)
 321 {
 322         NetVis *self=reinterpret_cast<NetVis *>(user);
 323
 324         const ethhdr *eth=reinterpret_cast<const ethhdr *>(data);
 325         if(ntohs(eth->h_proto)==ETH_P_IP)
 326         {
 327                 const iphdr *ip=reinterpret_cast<const iphdr *>(eth+1);
 328
 329                 unsigned size=ntohs(ip->tot_len);
 330                 unsigned port=0;
 331                 if(ip->protocol==IPPROTO_TCP)
 332                 {
 333                         const tcphdr *tcp=reinterpret_cast<const tcphdr *>(ip+1);
 334                         port=min(ntohs(tcp->source), ntohs(tcp->dest));
 335                 }
 336                 else if(ip->protocol==IPPROTO_UDP)
 337                 {
 338                         const udphdr *udp=reinterpret_cast<const udphdr *>(ip+1);
 339                         port=min(ntohs(udp->source), ntohs(udp->dest));
 340                 }
 341                 Host &shost=self->get_host(ntohl(ip->saddr));
 342                 Host *dhost=0;
 343                 if((ntohl(ip->daddr)&0xFF)!=0xFF)
 344                         dhost=&self->get_host(ntohl(ip->daddr));
 345
 346                 float throttle=shost.send_packet();
 347                 if(throttle<1)
 348                 {
 349                         self->packets.push_back(new Packet(shost, dhost, self->get_port_color(port), size));
 350                         self->packets.back()->tick(-throttle*Msp::Time::sec);
 351                 }
 352
 353                 shost.add_activity(size);
 354                 if(dhost)
 355                         dhost->add_activity(size);
 356         }
 357 }
 358
 359 void NetVis::sighandler(int)
 360 {
 361         exit(0);
 362 }
 363
 364 Application::RegApp<NetVis> NetVis::reg;