Initial revision

diff --git a/Build b/Build
new file mode 100644 (file)
index 0000000..bb1b9a1
--- /dev/null
+++ b/Build
@@ -0,0 +1,16 @@
+package "netvis"
+{
+       require "mspcore";
+       require "mspgbase";
+       require "mspgl";
+
+       build_info
+       {
+               library "pcap";
+       };
+
+       program "netvis"
+       {
+               source "source";
+       };
+};

diff --git a/dejavu-10.font b/dejavu-10.font
new file mode 100644 (file)
index 0000000..e2f7dba
--- /dev/null
+++ b/dejavu-10.font
@@ -0,0 +1,1341 @@
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diff --git a/dejavu-10.tex b/dejavu-10.tex
new file mode 100644 (file)
index 0000000..c7f5313
Binary files /dev/null and b/dejavu-10.tex differ

diff --git a/source/host.cpp b/source/host.cpp
new file mode 100644 (file)
index 0000000..be24f05
--- /dev/null
+++ b/source/host.cpp
@@ -0,0 +1,95 @@
+#include <cmath>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <msp/gl/immediate.h>
+#include <msp/gl/matrix.h>
+#include <msp/gl/texture.h>
+#include <msp/gl/transform.h>
+#include <msp/time/units.h>
+#include "host.h"
+#include "netvis.h"
+
+using namespace std;
+using namespace Msp;
+
+Host::Host(NetVis &nv, unsigned a):
+       netvis(nv),
+       addr(a)
+{
+       in_addr ina;
+       ina.s_addr=htonl(addr);
+       name=inet_ntoa(ina);
+}
+
+void Host::set_position(const Vector2 &p)
+{
+       pos=p;
+}
+
+void Host::add_connection(Connection &)
+{
+}
+
+Connection *Host::get_connection(Host &)
+{
+       return 0;
+}
+
+void Host::tick(const Msp::Time::TimeDelta &td)
+{
+       float dt=td/Msp::Time::sec;
+
+       const map<unsigned, Host *> &hosts=netvis.get_hosts();
+       float fx=-pos.x*0.1;
+       float fy=-pos.y*0.1;
+       for(map<unsigned, Host *>::const_iterator i=hosts.begin(); i!=hosts.end(); ++i)
+       {
+               if(i->second!=this)
+               {
+                       const Vector2 &other_pos=i->second->get_position();
+                       float dx=other_pos.x-pos.x;
+                       float dy=other_pos.y-pos.y;
+                       float d2=dx*dx+dy*dy;
+                       float d=sqrt(d2);
+
+                       unsigned other_addr=i->second->get_address();
+                       unsigned matching_bits=0;
+                       for(unsigned j=32; (j-- && !((addr^other_addr)>>j));)
+                               ++matching_bits;
+
+                       float nearness=24-min(matching_bits, 24U);
+                       float f=10000.0*(1.0/(60+nearness*15)-1.0/d);
+
+                       fx+=dx/d*f;
+                       fy+=dy/d*f;
+               }
+       }
+
+       if(fx<-4 || fx>4)
+               pos.x+=fx*dt;
+       if(fy<-4 || fy>4)
+               pos.y+=fy*dt;
+}
+
+void Host::render() const
+{
+       GL::push_matrix();
+       GL::translate(static_cast<int>(pos.x), static_cast<int>(pos.y), 0);
+
+       GL::Immediate imm((GL::COLOR4_UBYTE, GL::VERTEX2));
+       imm.begin(GL::QUADS);
+       imm.color(1.0f, 1.0f, 1.0f, 1.0f);
+       imm.vertex(-5, -5);
+       imm.vertex(5, -5);
+       imm.vertex(5, 5);
+       imm.vertex(-5, 5);
+       imm.end();
+
+       const GL::Font &font=netvis.get_font();
+       GL::translate(-static_cast<int>(font.get_string_width(name)*5), 6, 0);
+       GL::scale_uniform(10);
+       font.draw_string(name);
+       GL::Texture::unbind();
+
+       GL::pop_matrix();
+}

diff --git a/source/host.h b/source/host.h
new file mode 100644 (file)
index 0000000..60dc547
--- /dev/null
+++ b/source/host.h
@@ -0,0 +1,37 @@
+#ifndef HOST_H_
+#define HOST_H_
+
+#include <map>
+#include <string>
+#include <msp/time/timedelta.h>
+#include "vector2.h"
+
+class Connection;
+class NetVis;
+
+class Host
+{
+private:
+       NetVis &netvis;
+       unsigned addr;
+       std::string name;
+       Vector2 pos;
+       bool visible;
+       std::map<Host *, Connection *> connections;
+
+public:
+       Host(NetVis &, unsigned);
+       void set_position(const Vector2 &);
+       unsigned get_address() const { return addr; }
+       const std::string &get_name() const { return name; }
+       const Vector2 &get_position() const { return pos; }
+       bool get_visible() const { return visible; }
+
+       void add_connection(Connection &);
+       Connection *get_connection(Host &);
+
+       void tick(const Msp::Time::TimeDelta &);
+       void render() const;
+};
+
+#endif

diff --git a/source/netvis.cpp b/source/netvis.cpp
new file mode 100644 (file)
index 0000000..711788b
--- /dev/null
+++ b/source/netvis.cpp
@@ -0,0 +1,192 @@
+#include <iostream>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <linux/if_ether.h>
+#include <msp/core/except.h>
+#include <msp/gl/immediate.h>
+#include <msp/gl/matrix.h>
+#include <msp/gl/misc.h>
+#include <msp/gl/projection.h>
+#include <msp/gl/texture2d.h>
+#include <msp/gl/transform.h>
+#include <msp/strings/formatter.h>
+#include <msp/time/utils.h>
+#include "host.h"
+#include "netvis.h"
+#include "packet.h"
+
+using namespace std;
+using namespace Msp;
+
+NetVis::NetVis(int /*argc*/, char **argv)
+{
+       iface=argv[1];
+}
+
+int NetVis::main()
+{
+       char err[1024];
+       pcap=pcap_open_live(iface.c_str(), 128, true, 0, err);
+       if(!pcap)
+               throw Exception(err);
+
+       if(pcap_setnonblock(pcap, true, err)==-1)
+               throw Exception(err);
+
+       dpy=new Graphics::Display;
+       wnd=new Graphics::Window(*dpy, 1024, 768);
+       glc=new Graphics::GLContext(*wnd);
+       wnd->set_title("NetVis");
+       wnd->show();
+
+       GL::enable(GL_BLEND);
+       glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+       font=new GL::Font;
+       DataFile::load(*font, "dejavu-10.font");
+       font_tex=new GL::Texture2D;
+       DataFile::load(*font_tex, "dejavu-10.tex");
+       font->set_texture(*font_tex);
+
+       Application::main();
+
+       delete glc;
+       delete wnd;
+       delete dpy;
+
+       return exit_code;
+}
+
+void NetVis::tick()
+{
+       Msp::Time::TimeStamp t=Msp::Time::now();
+       if(!last_tick)
+               last_tick=t;
+       Msp::Time::TimeDelta dt=t-last_tick;
+       last_tick=t;
+
+       dpy->tick();
+
+       pcap_dispatch(pcap, -1, &capture_handler, reinterpret_cast<unsigned char *>(this));
+
+       glClear(GL_COLOR_BUFFER_BIT);
+
+       GL::matrix_mode(GL::PROJECTION);
+       GL::load_identity();
+       GL::ortho_centered(1024, 768);
+       GL::matrix_mode(GL::MODELVIEW);
+       GL::load_identity();
+
+       for(map<unsigned, Host *>::iterator i=hosts.begin(); i!=hosts.end(); ++i)
+       {
+               i->second->tick(dt);
+               i->second->render();
+       }
+       for(list<Packet *>::iterator i=packets.begin(); i!=packets.end();)
+       {
+               (*i)->tick(dt);
+               (*i)->render();
+               if((*i)->get_stale())
+               {
+                       delete *i;
+                       i=packets.erase(i);
+               }
+               else
+                       ++i;
+       }
+
+       GL::translate(-500, 360, 0);
+       for(map<unsigned, GL::Color>::iterator i=port_colors.begin(); i!=port_colors.end(); ++i)
+       {
+               GL::Color &color=i->second;
+
+               GL::push_matrix();
+
+               GL::Immediate imm((GL::COLOR4_UBYTE,GL::VERTEX2));
+               imm.begin(GL::QUADS);
+               imm.color(color.r, color.g, color.b, color.a);
+               for(float x=0; x<0.5; x+=0.2)
+               {
+                       imm.vertex(x+0, 0);
+                       imm.vertex(x+10, 0);
+                       imm.vertex(x+10, 10);
+                       imm.vertex(x+0, 10);
+               }
+               imm.end();
+
+               GL::translate(15, 1, 0);
+               GL::scale_uniform(10);
+               glColor4f(1.0, 1.0, 1.0, 1.0);
+               font->draw_string(format("%d", i->first));
+               GL::Texture::unbind();
+
+               GL::pop_matrix();
+               GL::translate(0, -12, 0);
+       }
+
+       glc->swap_buffers();
+}
+
+Host &NetVis::get_host(unsigned a)
+{
+       map<unsigned, Host *>::iterator i=hosts.find(a);
+       if(i!=hosts.end())
+               return *i->second;
+
+       Host *host=new Host(*this, a);
+       host->set_position(Vector2(rand()*30.0/RAND_MAX-15.0, rand()*20.0/RAND_MAX-10.0));
+       hosts[a]=host;
+       return *host;
+}
+
+GL::Color &NetVis::get_port_color(unsigned port)
+{
+       map<unsigned, GL::Color>::iterator i=port_colors.find(port);
+       if(i!=port_colors.end())
+               return i->second;
+
+       GL::Color color;
+       while(1)
+       {
+               color.r=rand()*1.0/RAND_MAX;
+               color.g=rand()*1.0/RAND_MAX;
+               color.b=rand()*1.0/RAND_MAX;
+               if(color.r>0.5 || color.g>0.5 || color.b>0.7)
+                       break;
+       }
+       color.a=0.4f;
+       return port_colors[port]=color;
+}
+
+void NetVis::capture_handler(unsigned char *user, const pcap_pkthdr *, const unsigned char *data)
+{
+       NetVis *self=reinterpret_cast<NetVis *>(user);
+
+       const ethhdr *eth=reinterpret_cast<const ethhdr *>(data);
+       if(ntohs(eth->h_proto)==ETH_P_IP)
+       {
+               const iphdr *ip=reinterpret_cast<const iphdr *>(eth+1);
+
+               //cout<<"IP packet of "<<hdr->len<<'/'<<ntohs(ip->tot_len)<<" bytes\n";
+
+               unsigned port=0;
+               if(ip->protocol==IPPROTO_TCP)
+               {
+                       const tcphdr *tcp=reinterpret_cast<const tcphdr *>(ip+1);
+                       port=min(ntohs(tcp->source), ntohs(tcp->dest));
+               }
+               else if(ip->protocol==IPPROTO_UDP)
+               {
+                       const udphdr *udp=reinterpret_cast<const udphdr *>(ip+1);
+                       port=min(ntohs(udp->source), ntohs(udp->dest));
+               }
+               Host &shost=self->get_host(ntohl(ip->saddr));
+               Host *dhost=0;
+               if((ntohl(ip->daddr)&0xFF)!=0xFF)
+                       dhost=&self->get_host(ntohl(ip->daddr));
+               self->packets.push_back(new Packet(shost, dhost, self->get_port_color(port), ntohs(ip->tot_len)));
+       }
+}
+
+Application::RegApp<NetVis> NetVis::reg;

diff --git a/source/netvis.h b/source/netvis.h
new file mode 100644 (file)
index 0000000..daec1cf
--- /dev/null
+++ b/source/netvis.h
@@ -0,0 +1,48 @@
+#ifndef NETVIS_H_
+#define NETVIS_H_
+
+#include <list>
+#include <map>
+#include <pcap.h>
+#include <msp/core/application.h>
+#include <msp/gbase/display.h>
+#include <msp/gbase/glcontext.h>
+#include <msp/gbase/window.h>
+#include <msp/gl/color.h>
+#include <msp/gl/font.h>
+#include <msp/time/timestamp.h>
+
+class Packet;
+class Host;
+
+class NetVis: public Msp::Application
+{
+private:
+       std::string iface;
+       pcap_t *pcap;
+       std::list<Packet *> packets;
+       std::map<unsigned, Host *> hosts;
+       Msp::Graphics::Display *dpy;
+       Msp::Graphics::Window *wnd;
+       Msp::Graphics::GLContext *glc;
+       Msp::Time::TimeStamp last_tick;
+       std::map<unsigned, Msp::GL::Color> port_colors;
+       Msp::GL::Font *font;
+       Msp::GL::Texture2D *font_tex;
+
+public:
+       NetVis(int, char **);
+       int main();
+       const Msp::GL::Font &get_font() const { return *font; }
+       const std::map<unsigned, Host *> &get_hosts() const { return hosts; }
+private:
+       virtual void tick();
+       Host &get_host(unsigned);
+       Msp::GL::Color &get_port_color(unsigned);
+
+       static void capture_handler(unsigned char *, const pcap_pkthdr *, const unsigned char *);
+
+       static Application::RegApp<NetVis> reg;
+};
+
+#endif

diff --git a/source/packet.cpp b/source/packet.cpp
new file mode 100644 (file)
index 0000000..491e807
--- /dev/null
+++ b/source/packet.cpp
@@ -0,0 +1,72 @@
+#include <cmath>
+#include <msp/gl/immediate.h>
+#include <msp/gl/matrix.h>
+#include <msp/gl/transform.h>
+#include <msp/time/units.h>
+#include "host.h"
+#include "packet.h"
+
+using namespace Msp;
+
+Packet::Packet(const Host &s, const Host *d, const GL::Color &c, unsigned i):
+       src(s),
+       dest(d),
+       color(c),
+       x(0),
+       size(cbrt(i)),
+       angle(rand()*180.0/RAND_MAX),
+       rspeed(rand()*180.0/RAND_MAX-90.0)
+{
+}
+
+void Packet::tick(const Time::TimeDelta &dt)
+{
+       double f=dt/Time::sec;
+       x+=f;
+       if(x>1)
+               x=1;
+       angle+=rspeed*f;
+       if(angle<0)
+               angle+=360;
+       if(angle>=360)
+               angle-=360;
+}
+
+void Packet::render() const
+{
+       GL::push_matrix();
+
+       const Vector2 &spos=src.get_position();
+
+       if(dest)
+       {
+               const Vector2 &dpos=dest->get_position();
+               GL::translate(spos.x*(1-x)+dpos.x*x, spos.y*(1-x)+dpos.y*x, 0);
+               GL::rotate(angle, 0, 0, 1);
+
+               GL::Immediate imm((GL::COLOR4_UBYTE,GL::VERTEX2));
+               imm.begin(GL::QUADS);
+               imm.color(color.r, color.g, color.b, color.a);
+               imm.vertex(-size, -size);
+               imm.vertex(size, -size);
+               imm.vertex(size, size);
+               imm.vertex(-size, size);
+               imm.end();
+       }
+       else
+       {
+               GL::translate(spos.x, spos.y, 0);
+               GL::Immediate imm((GL::COLOR4_UBYTE,GL::VERTEX2));
+               imm.begin(GL::TRIANGLE_FAN);
+               imm.color(color.r, color.g, color.b, color.a*(1-x));
+               imm.vertex(0, 0);
+               for(unsigned i=0; i<=24; ++i)
+               {
+                       float a=i*M_PI/12;
+                       imm.vertex(cos(a)*x*200, sin(a)*x*200);
+               }
+               imm.end();
+       }
+
+       GL::pop_matrix();
+}

diff --git a/source/packet.h b/source/packet.h
new file mode 100644 (file)
index 0000000..cfeb2df
--- /dev/null
+++ b/source/packet.h
@@ -0,0 +1,27 @@
+#ifndef PACKET_H_
+#define PACKET_H_
+
+#include <msp/gl/color.h>
+#include <msp/time/timedelta.h>
+
+class Host;
+
+class Packet
+{
+private:
+       const Host &src;
+       const Host *dest;
+       Msp::GL::Color color;
+       float x;
+       float size;
+       float angle;
+       float rspeed;
+
+public:
+       Packet(const Host &, const Host *, const Msp::GL::Color &, unsigned);
+       bool get_stale() const { return x>=1; }
+       void tick(const Msp::Time::TimeDelta &);
+       void render() const;
+};
+
+#endif

diff --git a/source/vector2.h b/source/vector2.h
new file mode 100644 (file)
index 0000000..0ff927c
--- /dev/null
+++ b/source/vector2.h
@@ -0,0 +1,12 @@
+#ifndef VECTOR2_H_
+#define VECTOR2_H_
+
+struct Vector2
+{
+       float x, y;
+
+       Vector2(): x(0), y(0) { }
+       Vector2(float x_, float y_): x(x_), y(y_) { }
+};
+
+#endif