public LinuxTap(string dev)
{
int TUNSETIFF = GetIOCtlWrite('T', 202, 4); /* size of int 4, from if_tun.h */
ifreq1 ifr1 = new ifreq1();
int fd;
if ((fd = Syscall.open("/dev/net/tun", OpenFlags.O_RDWR)) < 0) {
throw new Exception("Failed to open /dev/net/tun");
}
ifr1.ifru_flags = IFF_TAP | IFF_NO_PI;
ifr1.ifrn_name = dev;
if (ioctl(fd, TUNSETIFF, ref ifr1) < 0) {
Syscall.close(fd);
throw new Exception("TUNSETIFF failed");
}
_fd = fd;
int ctrl_fd = socket(AF_INET, SOCK_DGRAM, 0);
if(ctrl_fd == -1) {
Syscall.close(fd);
throw new Exception("Unable to open CTL_FD");
}
ifreq2 ifr2 = new ifreq2();
ifr2.ifrn_name = dev; // ioctl changed the name?
if(ioctl(ctrl_fd, SIOCGIFHWADDR, ref ifr2) <0) {
Console.WriteLine("Failed to get hw addr.");
Syscall.close(ctrl_fd);
throw new Exception("Failed to get hw addr.");
}
_addr = MemBlock.Reference(ASCIIEncoding.UTF8.GetBytes(ifr2.ifr_hwaddr.sa_data));
}
public LinuxTap(string dev)
{
int TUNSETIFF = GetIOCtlWrite('T', 202, 4); /* size of int 4, from if_tun.h */
ifreq1 ifr1 = new ifreq1();
int fd;
if ((fd = Syscall.open("/dev/net/tun", OpenFlags.O_RDWR)) < 0)
{
throw new Exception("Failed to open /dev/net/tun");
}
ifr1.ifru_flags = IFF_TAP | IFF_NO_PI;
ifr1.ifrn_name = dev;
if (ioctl(fd, TUNSETIFF, ref ifr1) < 0)
{
Syscall.close(fd);
throw new Exception("TUNSETIFF failed");
}
_fd = fd;
int ctrl_fd = socket(AF_INET, SOCK_DGRAM, 0);
if (ctrl_fd == -1)
{
Syscall.close(fd);
throw new Exception("Unable to open CTL_FD");
}
ifreq2 ifr2 = new ifreq2();
ifr2.ifrn_name = dev; // ioctl changed the name?
if (ioctl(ctrl_fd, SIOCGIFHWADDR, ref ifr2) < 0)
{
Console.WriteLine("Failed to get hw addr.");
Syscall.close(ctrl_fd);
throw new Exception("Failed to get hw addr.");
}
_addr = MemBlock.Reference(ASCIIEncoding.UTF8.GetBytes(ifr2.ifr_hwaddr.sa_data));
}
private extern static int ioctl(int fd, int request, ref ifreq1 arg);
private static extern int ioctl(int fd, int request, ref ifreq1 arg);
