Firewall Handbuch für LINUX 2.0 und 2.2 - zurück

*server_udp_port = ntohs(name.sin_port) ;
if (dflg) fprintf(stderr, "port %d allocated\n", *server_udp_port) ;
return 0 ;
}
/*
* Each connection is handled by a separate process.
*/
void do_child(int newfd)
{
struct sockaddr name, namepeer ;
struct sockaddr_in where ;
struct sockaddr_in outudp ;
struct sockaddr_in from; /* Sending host address */
fd_set rfd ;
int already_bind = 0 ;
char buffer[4096] ;
char zone[64] ;
int pos = 0 ;
int namelen , fromlen, i ;
int fd_to_proxy ;
int maxfd ;
int lu , res ;
int sockudp , sockcl ;
int client_udp_port, server_udp_port ;
namelen = sizeof(namepeer) ;
i = getpeername(newfd, , ) ;
/* This hack, is the TRANSPARENT PROXY magic :
* We want to know wich destination the client want to connect
*/
namelen = sizeof(name) ;
i = getsockname(newfd, , ) ;
if (lflg || dflg) {
time_t tnow ;
struct tm *tm ;
time() ;
tm = localtime() ;
fprintf(stderr, "%02d:%02d:%02d %d.%d.%d.%d:%d ->
%d.%d.%d.%d ",
tm->tm_hour,
tm->tm_min,
tm->tm_sec,
namepeer.sa_data[2] & 255,
namepeer.sa_data[3] & 255,
namepeer.sa_data[4] & 255,
namepeer.sa_data[5] & 255,
ntohs(((struct sockaddr_in *))->sin_port),
name.sa_data[2] & 255,
name.sa_data[3] & 255,
name.sa_data[4] & 255,
name.sa_data[5] & 255) ;
}
fd_to_proxy = serverconnect() ;
if (fd_to_proxy == -1) exit(1) ;
lu = read(newfd, buffer, sizeof(buffer)) ;
if (dflg) {
printf("From client : (%d)\n", lu) ;
fflush(stdout) ;
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