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#include <config.h>
#include "Network.h"
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
Listener::Listener(const char* h, int p, struct sockaddr_in s,bool r)
{
if (h==0)
host[0]=0;
else {
int l = strlen(h);
if (l>99) l=99;
strncpy(host, h, l);
host[l] = 0;
}
port = p;
sin = s;
reachable = r;
}
Network::Network(int port)
{
struct sockaddr_in name;
int i,j;
listeners.setAutoDelete(TRUE);
fd = ::socket (PF_INET, SOCK_STREAM, 0);
if (fd<0) return;
for(i = 0; i<5;i++) {
name.sin_family = AF_INET;
name.sin_port = htons (port+i);
name.sin_addr.s_addr = htonl (INADDR_ANY);
if (bind (fd, (struct sockaddr *) &name, sizeof (name)) >= 0)
break;
// printf("...Port %d in use\n", port+i);
}
mySin = name;
// printf("I'm using Port %d\n", port+i);
if (i==5) {
printf("Error in bind to port %d\n", port);
close(fd);
fd = -1;
return;
}
for(j = 0; j<i;j++)
addListener("127.0.0.1", port+j);
if (::listen(fd,5)<0) {
printf("Error in listen\n");
close(fd);
fd = -1;
return;
}
sn = new TQSocketNotifier( fd, TQSocketNotifier::Read );
TQObject::connect( sn, TQ_SIGNAL(activated(int)),
this, TQ_SLOT(gotConnection()) );
}
Network::~Network()
{
if (fd<0) return;
close(fd);
char tmp[50];
int len = sprintf(tmp, "unreg %d", ntohs(mySin.sin_port));
Listener* l;
for(l=listeners.first(); l!=0; l=listeners.next()) {
if (l->reachable)
sendString( l->sin, tmp, len);
}
listeners.clear();
delete sn;
}
void Network::gotConnection()
{
static char tmp[1024];
int len=0;
struct sockaddr_in sin;
socklen_t sz = sizeof (sin);
// printf("GotConnection: ");
int s = accept(fd,(struct sockaddr *)&sin, &sz);
if (s<0) {
printf("Error in accept\n");
return;
}
while(read(s, tmp+len, 1)==1) len++;
close(s);
tmp[len]=0; len++;
// printf("Got: '%s'\n",tmp);
if (strncmp(tmp,"reg ",4)==0) {
int port = atoi(tmp+4);
sin.sin_port = htons( port );
Listener *l = new Listener(0,0,sin);
// printf("Reg of 0x%x:%d\n",
// ntohl(sin.sin_addr.s_addr ), ntohs(sin.sin_port));
listeners.append(l);
return;
}
if (strncmp(tmp,"unreg ",6)==0) {
int port = atoi(tmp+6);
sin.sin_port = htons( port );
Listener* l;
for(l=listeners.first(); l!=0; l=listeners.next())
if (l->sin.sin_addr.s_addr == sin.sin_addr.s_addr &&
l->sin.sin_port == sin.sin_port) break;
if (l==0) {
printf("Error: UnReg of 0x%x:%d. Not Found\n",
ntohl(sin.sin_addr.s_addr), ntohs(sin.sin_port));
return;
}
listeners.remove(l);
// printf("UnReg of 0x%x:%d\n",
// ntohl(sin.sin_addr.s_addr), ntohs(sin.sin_port));
return;
}
if (strncmp(tmp,"pos ",4)==0) {
emit gotPosition(tmp+4);
}
}
void Network::addListener(const char* host, int port)
{
struct hostent *hostinfo;
struct sockaddr_in name;
memset(&name, 0, sizeof(struct sockaddr_in));
name.sin_family = AF_INET;
name.sin_port = htons (port);
hostinfo = gethostbyname (host);
if (hostinfo == NULL) {
printf ("Error in addListener: Unknown host %s.\n", host);
return;
}
name.sin_addr = *(struct in_addr *) hostinfo->h_addr;
Listener *l = new Listener(host,port,name);
// printf("Added Listener %s, 0x%x:%d\n",
// host, ntohl(name.sin_addr.s_addr), ntohs(name.sin_port));
listeners.append(l);
char tmp[50];
int len = sprintf(tmp, "reg %d", ntohs(mySin.sin_port));
if (!sendString( name, tmp, len))
listeners.remove(l);
}
void Network::broadcast(const char* pos)
{
char tmp[1024];
int len = sprintf(tmp,"pos %s", pos);
for(Listener* l=listeners.first(); l!=0; l=listeners.next())
if (l->reachable)
l->reachable = sendString(l->sin, tmp, len);
}
bool Network::sendString(struct sockaddr_in sin, char* str, int len)
{
int s = ::socket (PF_INET, SOCK_STREAM, 0);
if (s<0) {
printf("Error in sendString/socket ??\n");
return false;
}
if (::connect (s, (struct sockaddr *)&sin, sizeof (sin)) <0) {
printf("Error in sendString/connect to socket 0x%x:%d\n",
ntohl(sin.sin_addr.s_addr), ntohs(sin.sin_port) );
return false;
}
write(s, str, len);
close(s);
// printf("Send '%s' to 0x%x:%d\n", str,
// ntohl(sin.sin_addr.s_addr), ntohs(sin.sin_port) );
return true;
}
#include "Network.moc"
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