C++ (Cpp) ip6ip6_tnl_locate示例

示例#1

文件： ip6_tunnel.c 项目： philenotfound/belkin-wemo-linux-2.6.21.x

static int
ip6ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
	int err = 0;
	struct ip6_tnl_parm p;
	struct ip6_tnl *t = NULL;

	switch (cmd) {
	case SIOCGETTUNNEL:
		if (dev == ip6ip6_fb_tnl_dev) {
			if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p))) {
				err = -EFAULT;
				break;
			}
			t = ip6ip6_tnl_locate(&p, 0);
		}
		if (t == NULL)
			t = netdev_priv(dev);
		memcpy(&p, &t->parms, sizeof (p));
		if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof (p))) {
			err = -EFAULT;
		}
		break;
	case SIOCADDTUNNEL:
	case SIOCCHGTUNNEL:
		err = -EPERM;
		if (!capable(CAP_NET_ADMIN))
			break;
		err = -EFAULT;
		if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p)))
			break;
		err = -EINVAL;
		if (p.proto != IPPROTO_IPV6)
			break;
		t = ip6ip6_tnl_locate(&p, cmd == SIOCADDTUNNEL);
		if (dev != ip6ip6_fb_tnl_dev && cmd == SIOCCHGTUNNEL) {
			if (t != NULL) {
				if (t->dev != dev) {
					err = -EEXIST;
					break;
				}
			} else
				t = netdev_priv(dev);

			ip6ip6_tnl_unlink(t);
			err = ip6ip6_tnl_change(t, &p);
			ip6ip6_tnl_link(t);
			netdev_state_change(dev);
		}
		if (t) {
			err = 0;
			if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof (p)))
				err = -EFAULT;

		} else
			err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT);
		break;
	case SIOCDELTUNNEL:
		err = -EPERM;
		if (!capable(CAP_NET_ADMIN))
			break;

		if (dev == ip6ip6_fb_tnl_dev) {
			err = -EFAULT;
			if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p)))
				break;
			err = -ENOENT;
			if ((t = ip6ip6_tnl_locate(&p, 0)) == NULL)
				break;
			err = -EPERM;
			if (t->dev == ip6ip6_fb_tnl_dev)
				break;
			dev = t->dev;
		}
		err = 0;
		unregister_netdevice(dev);
		break;
	default:
		err = -EINVAL;
	}
	return err;
}

示例#2

文件： ip6_tunnel.c 项目： FatSunHYS/OSCourseDesign

static int
ip6ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
	int err = 0;
	int create;
	struct ip6_tnl_parm p;
	struct ip6_tnl *t = NULL;

	switch (cmd) {
	case SIOCGETTUNNEL:
		if (dev == ip6ip6_fb_tnl_dev) {
			if (copy_from_user(&p,
					   ifr->ifr_ifru.ifru_data,
					   sizeof (p))) {
				err = -EFAULT;
				break;
			}
			if ((err = ip6ip6_tnl_locate(&p, &t, 0)) == -ENODEV)
				t = netdev_priv(dev);
			else if (err)
				break;
		} else
			t = netdev_priv(dev);

		memcpy(&p, &t->parms, sizeof (p));
		if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof (p))) {
			err = -EFAULT;
		}
		break;
	case SIOCADDTUNNEL:
	case SIOCCHGTUNNEL:
		err = -EPERM;
		create = (cmd == SIOCADDTUNNEL);
		if (!capable(CAP_NET_ADMIN))
			break;
		if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p))) {
			err = -EFAULT;
			break;
		}
		if (!create && dev != ip6ip6_fb_tnl_dev) {
			t = netdev_priv(dev);
		}
		if (!t && (err = ip6ip6_tnl_locate(&p, &t, create))) {
			break;
		}
		if (cmd == SIOCCHGTUNNEL) {
			if (t->dev != dev) {
				err = -EEXIST;
				break;
			}
			ip6ip6_tnl_unlink(t);
			err = ip6ip6_tnl_change(t, &p);
			ip6ip6_tnl_link(t);
			netdev_state_change(dev);
		}
		if (copy_to_user(ifr->ifr_ifru.ifru_data,
				 &t->parms, sizeof (p))) {
			err = -EFAULT;
		} else {
			err = 0;
		}
		break;
	case SIOCDELTUNNEL:
		err = -EPERM;
		if (!capable(CAP_NET_ADMIN))
			break;

		if (dev == ip6ip6_fb_tnl_dev) {
			if (copy_from_user(&p, ifr->ifr_ifru.ifru_data,
					   sizeof (p))) {
				err = -EFAULT;
				break;
			}
			err = ip6ip6_tnl_locate(&p, &t, 0);
			if (err)
				break;
			if (t == netdev_priv(ip6ip6_fb_tnl_dev)) {
				err = -EPERM;
				break;
			}
		} else {
			t = netdev_priv(dev);
		}
		err = unregister_netdevice(t->dev);
		break;
	default:
		err = -EINVAL;
	}
	return err;
}