Python-сообщество

python -c "import os; os.system('ssh -f -N -L <local_port>:<host>:<host_port> <ssh_user>@<ssh_server>')"

cmd = "ssh -f -w %(local_tun)s:%(remote_tun)s %(remote_host)s 'iptunnel add tun%(remote_tun)d \
                                mode ipip remote %(local_host)s local %(remote_host)s; \
                                ifconfig tun%(remote_tun)d %(remote_ip)s netmask %(netmask)s pointopoint %(local_ip)s'" % self.__dict__
                self.ssh_proc = subprocess.Popen(shlex.split(cmd),stdin=sys.stdin,stdout=sys.stdout)
                self.ssh_proc.wait()
                time.sleep(5)
                #
                os.system("/sbin/iptunnel add tun%d mode ipip remote %s local %s" % (self.local_tun,self.remote_host,self.local_host))
                os.system("/sbin/ifconfig tun0 %s netmask %s pointopoint %s" % \
                                (self.local_ip,self.netmask,self.remote_ip))

os.system("/sbin/iptunnel add tun%d mode ipip remote %s local %s" % (self.local_tun,self.remote_host,self.local_host))

TUNSETIFF   = 0x400454ca
IFF_TUN     = 0x0001

class Link:
    def __init__(self,interfaceName):
       self.netDeviceFD = os.open("/dev/net/tun", os.O_RDWR)
       ifs = ioctl(self.netDeviceFD, TUNSETIFF, struct.pack("16sH", interfaceName, IFF_TUN))
       print "Using interface %s" % ifs[:16].strip("\x00")
       ...
       packet = os.read(self.netDeviceFD,1500)

#include <linux/if.h>
#include <linux/if_tun.h>

int tun_alloc(char *dev)
{
    struct ifreq ifr;
    int fd, err;

    if( (fd = open("/dev/net/tun", O_RDWR)) < 0 ) 
       return tun_alloc_old(dev);

    memset(&ifr, 0, sizeof(ifr));

    /* Flags: IFF_TUN   - TUN device (no Ethernet headers) 
     *        IFF_TAP   - TAP device  
     *
     *        IFF_NO_PI - Do not provide packet information  
     */ 
    ifr.ifr_flags = IFF_TUN; 
    if( *dev ) 
       strncpy(ifr.ifr_name, dev, IFNAMSIZ);

    if( (err = ioctl(fd, TUNSETIFF, (void *) &ifr)) < 0 ){
       close(fd);
       return err;
    }
    strcpy(dev, ifr.ifr_name);
    return fd;
}