static int af_packet_update_properties ( struct net_device *netdev )
{
struct af_packet_nic *nic = netdev->priv;
struct ifreq if_data;
int ret;
/* retrieve default MAC address */
int fd = linux_socket(LINUX_AF_PACKET, LINUX_SOCK_RAW, 0);
if (fd < 0) {
DBGC(nic, "af_packet %p cannot create raw socket (%s)\n",
nic, linux_strerror(linux_errno));
return fd;
}
/* retrieve host's MAC address */
memset(&if_data, 0, sizeof(if_data));
strncpy(if_data.ifr_name, nic->ifname, sizeof(if_data.ifr_name));
ret = linux_ioctl(fd, LINUX_SIOCGIFHWADDR, &if_data);
if (ret < 0) {
DBGC(nic, "af_packet %p cannot get mac addr (%s)\n",
nic, linux_strerror(linux_errno));
linux_close(fd);
return ret;
}
linux_close(fd);
/* struct sockaddr = { u16 family, u8 pad[14] (equiv. sa_data) }; */
memcpy(netdev->ll_addr, if_data.ifr_hwaddr.pad, ETH_ALEN);
return 0;
}
/** Open the linux interface */
static int af_packet_nic_open ( struct net_device * netdev )
{
struct af_packet_nic * nic = netdev->priv;
struct sockaddr_ll socket_address;
struct ifreq if_data;
int ret;
nic->fd = linux_socket(LINUX_AF_PACKET, LINUX_SOCK_RAW,
htons(ETH_P_ALL));
if (nic->fd < 0) {
DBGC(nic, "af_packet %p socket(AF_PACKET) = %d (%s)\n",
nic, nic->fd, linux_strerror(linux_errno));
return nic->fd;
}
/* resolve ifindex of ifname */
memset(&if_data, 0, sizeof(if_data));
strncpy(if_data.ifr_name, nic->ifname, sizeof(if_data.ifr_name));
ret = linux_ioctl(nic->fd, LINUX_SIOCGIFINDEX, &if_data);
if (ret < 0) {
DBGC(nic, "af_packet %p ioctl(SIOCGIFINDEX) = %d (%s)\n",
nic, ret, linux_strerror(linux_errno));
linux_close(nic->fd);
return ret;
}
nic->ifindex = if_data.ifr_ifindex;
/* bind to interface */
memset(&socket_address, 0, sizeof(socket_address));
socket_address.sll_family = LINUX_AF_PACKET;
socket_address.sll_ifindex = nic->ifindex;
socket_address.sll_protocol = htons(ETH_P_ALL);
ret = linux_bind(nic->fd, (void *) &socket_address,
sizeof(socket_address));
if (ret == -1) {
DBGC(nic, "af_packet %p bind() = %d (%s)\n",
nic, ret, linux_strerror(linux_errno));
linux_close(nic->fd);
return ret;
}
/* Set nonblocking mode to make af_packet_nic_poll() easier */
ret = linux_fcntl(nic->fd, F_SETFL, O_NONBLOCK);
if (ret != 0) {
DBGC(nic, "af_packet %p fcntl(%d, ...) = %d (%s)\n",
nic, nic->fd, ret, linux_strerror(linux_errno));
linux_close(nic->fd);
return ret;
}
return 0;
}
static int linux_tcsetattr(int fd, int optional_actions, const struct termios *termios_p)
{
unsigned long int cmd;
switch (optional_actions)
{
case TCSANOW:
cmd = TCSETS;
break;
case TCSADRAIN:
cmd = TCSETSW;
break;
case TCSAFLUSH:
cmd = TCSETSF;
break;
default:
linux_errno = EINVAL;
return -1;
}
return linux_ioctl(fd, cmd, termios_p);
}
static int linux_tcgetattr(int fd, struct termios *termios_p)
{
return linux_ioctl(fd, TCGETS, termios_p);
}
