| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Linux NET3: IP/IP protocol decoder modified to support |
| * virtual tunnel interface |
| * |
| * Authors: |
| * Saurabh Mohan (saurabh.mohan@vyatta.com) 05/07/2012 |
| */ |
| |
| /* |
| This version of net/ipv4/ip_vti.c is cloned of net/ipv4/ipip.c |
| |
| For comments look at net/ipv4/ip_gre.c --ANK |
| */ |
| |
| |
| #include <linux/capability.h> |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/kernel.h> |
| #include <linux/uaccess.h> |
| #include <linux/skbuff.h> |
| #include <linux/netdevice.h> |
| #include <linux/in.h> |
| #include <linux/tcp.h> |
| #include <linux/udp.h> |
| #include <linux/if_arp.h> |
| #include <linux/init.h> |
| #include <linux/netfilter_ipv4.h> |
| #include <linux/if_ether.h> |
| #include <linux/icmpv6.h> |
| |
| #include <net/sock.h> |
| #include <net/ip.h> |
| #include <net/icmp.h> |
| #include <net/ip_tunnels.h> |
| #include <net/inet_ecn.h> |
| #include <net/xfrm.h> |
| #include <net/net_namespace.h> |
| #include <net/netns/generic.h> |
| |
| static struct rtnl_link_ops vti_link_ops __read_mostly; |
| |
| static unsigned int vti_net_id __read_mostly; |
| static int vti_tunnel_init(struct net_device *dev); |
| |
| static int vti_input(struct sk_buff *skb, int nexthdr, __be32 spi, |
| int encap_type, bool update_skb_dev) |
| { |
| struct ip_tunnel *tunnel; |
| const struct iphdr *iph = ip_hdr(skb); |
| struct net *net = dev_net(skb->dev); |
| struct ip_tunnel_net *itn = net_generic(net, vti_net_id); |
| |
| tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY, |
| iph->saddr, iph->daddr, 0); |
| if (tunnel) { |
| if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) |
| goto drop; |
| |
| XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = tunnel; |
| |
| if (update_skb_dev) |
| skb->dev = tunnel->dev; |
| |
| return xfrm_input(skb, nexthdr, spi, encap_type); |
| } |
| |
| return -EINVAL; |
| drop: |
| kfree_skb(skb); |
| return 0; |
| } |
| |
| static int vti_input_proto(struct sk_buff *skb, int nexthdr, __be32 spi, |
| int encap_type) |
| { |
| return vti_input(skb, nexthdr, spi, encap_type, false); |
| } |
| |
| static int vti_rcv(struct sk_buff *skb, __be32 spi, bool update_skb_dev) |
| { |
| XFRM_SPI_SKB_CB(skb)->family = AF_INET; |
| XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); |
| |
| return vti_input(skb, ip_hdr(skb)->protocol, spi, 0, update_skb_dev); |
| } |
| |
| static int vti_rcv_proto(struct sk_buff *skb) |
| { |
| return vti_rcv(skb, 0, false); |
| } |
| |
| static int vti_rcv_tunnel(struct sk_buff *skb) |
| { |
| return vti_rcv(skb, ip_hdr(skb)->saddr, true); |
| } |
| |
| static int vti_rcv_cb(struct sk_buff *skb, int err) |
| { |
| unsigned short family; |
| struct net_device *dev; |
| struct pcpu_sw_netstats *tstats; |
| struct xfrm_state *x; |
| const struct xfrm_mode *inner_mode; |
| struct ip_tunnel *tunnel = XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4; |
| u32 orig_mark = skb->mark; |
| int ret; |
| |
| if (!tunnel) |
| return 1; |
| |
| dev = tunnel->dev; |
| |
| if (err) { |
| dev->stats.rx_errors++; |
| dev->stats.rx_dropped++; |
| |
| return 0; |
| } |
| |
| x = xfrm_input_state(skb); |
| |
| inner_mode = &x->inner_mode; |
| |
| if (x->sel.family == AF_UNSPEC) { |
| inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol); |
| if (inner_mode == NULL) { |
| XFRM_INC_STATS(dev_net(skb->dev), |
| LINUX_MIB_XFRMINSTATEMODEERROR); |
| return -EINVAL; |
| } |
| } |
| |
| family = inner_mode->family; |
| |
| skb->mark = be32_to_cpu(tunnel->parms.i_key); |
| ret = xfrm_policy_check(NULL, XFRM_POLICY_IN, skb, family); |
| skb->mark = orig_mark; |
| |
| if (!ret) |
| return -EPERM; |
| |
| skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(skb->dev))); |
| skb->dev = dev; |
| |
| tstats = this_cpu_ptr(dev->tstats); |
| |
| u64_stats_update_begin(&tstats->syncp); |
| tstats->rx_packets++; |
| tstats->rx_bytes += skb->len; |
| u64_stats_update_end(&tstats->syncp); |
| |
| return 0; |
| } |
| |
| static bool vti_state_check(const struct xfrm_state *x, __be32 dst, __be32 src) |
| { |
| xfrm_address_t *daddr = (xfrm_address_t *)&dst; |
| xfrm_address_t *saddr = (xfrm_address_t *)&src; |
| |
| /* if there is no transform then this tunnel is not functional. |
| * Or if the xfrm is not mode tunnel. |
| */ |
| if (!x || x->props.mode != XFRM_MODE_TUNNEL || |
| x->props.family != AF_INET) |
| return false; |
| |
| if (!dst) |
| return xfrm_addr_equal(saddr, &x->props.saddr, AF_INET); |
| |
| if (!xfrm_state_addr_check(x, daddr, saddr, AF_INET)) |
| return false; |
| |
| return true; |
| } |
| |
| static netdev_tx_t vti_xmit(struct sk_buff *skb, struct net_device *dev, |
| struct flowi *fl) |
| { |
| struct ip_tunnel *tunnel = netdev_priv(dev); |
| struct ip_tunnel_parm *parms = &tunnel->parms; |
| struct dst_entry *dst = skb_dst(skb); |
| struct net_device *tdev; /* Device to other host */ |
| int pkt_len = skb->len; |
| int err; |
| int mtu; |
| |
| if (!dst) { |
| dev->stats.tx_carrier_errors++; |
| goto tx_error_icmp; |
| } |
| |
| dst_hold(dst); |
| dst = xfrm_lookup(tunnel->net, dst, fl, NULL, 0); |
| if (IS_ERR(dst)) { |
| dev->stats.tx_carrier_errors++; |
| goto tx_error_icmp; |
| } |
| |
| if (!vti_state_check(dst->xfrm, parms->iph.daddr, parms->iph.saddr)) { |
| dev->stats.tx_carrier_errors++; |
| dst_release(dst); |
| goto tx_error_icmp; |
| } |
| |
| tdev = dst->dev; |
| |
| if (tdev == dev) { |
| dst_release(dst); |
| dev->stats.collisions++; |
| goto tx_error; |
| } |
| |
| mtu = dst_mtu(dst); |
| if (skb->len > mtu) { |
| skb_dst_update_pmtu(skb, mtu); |
| if (skb->protocol == htons(ETH_P_IP)) { |
| icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, |
| htonl(mtu)); |
| } else { |
| if (mtu < IPV6_MIN_MTU) |
| mtu = IPV6_MIN_MTU; |
| |
| icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); |
| } |
| |
| dst_release(dst); |
| goto tx_error; |
| } |
| |
| skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(dev))); |
| skb_dst_set(skb, dst); |
| skb->dev = skb_dst(skb)->dev; |
| |
| err = dst_output(tunnel->net, skb->sk, skb); |
| if (net_xmit_eval(err) == 0) |
| err = pkt_len; |
| iptunnel_xmit_stats(dev, err); |
| return NETDEV_TX_OK; |
| |
| tx_error_icmp: |
| dst_link_failure(skb); |
| tx_error: |
| dev->stats.tx_errors++; |
| kfree_skb(skb); |
| return NETDEV_TX_OK; |
| } |
| |
| /* This function assumes it is being called from dev_queue_xmit() |
| * and that skb is filled properly by that function. |
| */ |
| static netdev_tx_t vti_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct ip_tunnel *tunnel = netdev_priv(dev); |
| struct flowi fl; |
| |
| if (!pskb_inet_may_pull(skb)) |
| goto tx_err; |
| |
| memset(&fl, 0, sizeof(fl)); |
| |
| switch (skb->protocol) { |
| case htons(ETH_P_IP): |
| xfrm_decode_session(skb, &fl, AF_INET); |
| memset(IPCB(skb), 0, sizeof(*IPCB(skb))); |
| break; |
| case htons(ETH_P_IPV6): |
| xfrm_decode_session(skb, &fl, AF_INET6); |
| memset(IP6CB(skb), 0, sizeof(*IP6CB(skb))); |
| break; |
| default: |
| goto tx_err; |
| } |
| |
| /* override mark with tunnel output key */ |
| fl.flowi_mark = be32_to_cpu(tunnel->parms.o_key); |
| |
| return vti_xmit(skb, dev, &fl); |
| |
| tx_err: |
| dev->stats.tx_errors++; |
| kfree_skb(skb); |
| return NETDEV_TX_OK; |
| } |
| |
| static int vti4_err(struct sk_buff *skb, u32 info) |
| { |
| __be32 spi; |
| __u32 mark; |
| struct xfrm_state *x; |
| struct ip_tunnel *tunnel; |
| struct ip_esp_hdr *esph; |
| struct ip_auth_hdr *ah ; |
| struct ip_comp_hdr *ipch; |
| struct net *net = dev_net(skb->dev); |
| const struct iphdr *iph = (const struct iphdr *)skb->data; |
| int protocol = iph->protocol; |
| struct ip_tunnel_net *itn = net_generic(net, vti_net_id); |
| |
| tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY, |
| iph->daddr, iph->saddr, 0); |
| if (!tunnel) |
| return -1; |
| |
| mark = be32_to_cpu(tunnel->parms.o_key); |
| |
| switch (protocol) { |
| case IPPROTO_ESP: |
| esph = (struct ip_esp_hdr *)(skb->data+(iph->ihl<<2)); |
| spi = esph->spi; |
| break; |
| case IPPROTO_AH: |
| ah = (struct ip_auth_hdr *)(skb->data+(iph->ihl<<2)); |
| spi = ah->spi; |
| break; |
| case IPPROTO_COMP: |
| ipch = (struct ip_comp_hdr *)(skb->data+(iph->ihl<<2)); |
| spi = htonl(ntohs(ipch->cpi)); |
| break; |
| default: |
| return 0; |
| } |
| |
| switch (icmp_hdr(skb)->type) { |
| case ICMP_DEST_UNREACH: |
| if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED) |
| return 0; |
| case ICMP_REDIRECT: |
| break; |
| default: |
| return 0; |
| } |
| |
| x = xfrm_state_lookup(net, mark, (const xfrm_address_t *)&iph->daddr, |
| spi, protocol, AF_INET); |
| if (!x) |
| return 0; |
| |
| if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH) |
| ipv4_update_pmtu(skb, net, info, 0, protocol); |
| else |
| ipv4_redirect(skb, net, 0, protocol); |
| xfrm_state_put(x); |
| |
| return 0; |
| } |
| |
| static int |
| vti_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| { |
| int err = 0; |
| struct ip_tunnel_parm p; |
| |
| if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) |
| return -EFAULT; |
| |
| if (cmd == SIOCADDTUNNEL || cmd == SIOCCHGTUNNEL) { |
| if (p.iph.version != 4 || p.iph.protocol != IPPROTO_IPIP || |
| p.iph.ihl != 5) |
| return -EINVAL; |
| } |
| |
| if (!(p.i_flags & GRE_KEY)) |
| p.i_key = 0; |
| if (!(p.o_flags & GRE_KEY)) |
| p.o_key = 0; |
| |
| p.i_flags = VTI_ISVTI; |
| |
| err = ip_tunnel_ioctl(dev, &p, cmd); |
| if (err) |
| return err; |
| |
| if (cmd != SIOCDELTUNNEL) { |
| p.i_flags |= GRE_KEY; |
| p.o_flags |= GRE_KEY; |
| } |
| |
| if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static const struct net_device_ops vti_netdev_ops = { |
| .ndo_init = vti_tunnel_init, |
| .ndo_uninit = ip_tunnel_uninit, |
| .ndo_start_xmit = vti_tunnel_xmit, |
| .ndo_do_ioctl = vti_tunnel_ioctl, |
| .ndo_change_mtu = ip_tunnel_change_mtu, |
| .ndo_get_stats64 = ip_tunnel_get_stats64, |
| .ndo_get_iflink = ip_tunnel_get_iflink, |
| }; |
| |
| static void vti_tunnel_setup(struct net_device *dev) |
| { |
| dev->netdev_ops = &vti_netdev_ops; |
| dev->type = ARPHRD_TUNNEL; |
| ip_tunnel_setup(dev, vti_net_id); |
| } |
| |
| static int vti_tunnel_init(struct net_device *dev) |
| { |
| struct ip_tunnel *tunnel = netdev_priv(dev); |
| struct iphdr *iph = &tunnel->parms.iph; |
| |
| memcpy(dev->dev_addr, &iph->saddr, 4); |
| memcpy(dev->broadcast, &iph->daddr, 4); |
| |
| dev->flags = IFF_NOARP; |
| dev->addr_len = 4; |
| dev->features |= NETIF_F_LLTX; |
| netif_keep_dst(dev); |
| |
| return ip_tunnel_init(dev); |
| } |
| |
| static void __net_init vti_fb_tunnel_init(struct net_device *dev) |
| { |
| struct ip_tunnel *tunnel = netdev_priv(dev); |
| struct iphdr *iph = &tunnel->parms.iph; |
| |
| iph->version = 4; |
| iph->protocol = IPPROTO_IPIP; |
| iph->ihl = 5; |
| } |
| |
| static struct xfrm4_protocol vti_esp4_protocol __read_mostly = { |
| .handler = vti_rcv_proto, |
| .input_handler = vti_input_proto, |
| .cb_handler = vti_rcv_cb, |
| .err_handler = vti4_err, |
| .priority = 100, |
| }; |
| |
| static struct xfrm4_protocol vti_ah4_protocol __read_mostly = { |
| .handler = vti_rcv_proto, |
| .input_handler = vti_input_proto, |
| .cb_handler = vti_rcv_cb, |
| .err_handler = vti4_err, |
| .priority = 100, |
| }; |
| |
| static struct xfrm4_protocol vti_ipcomp4_protocol __read_mostly = { |
| .handler = vti_rcv_proto, |
| .input_handler = vti_input_proto, |
| .cb_handler = vti_rcv_cb, |
| .err_handler = vti4_err, |
| .priority = 100, |
| }; |
| |
| static struct xfrm_tunnel ipip_handler __read_mostly = { |
| .handler = vti_rcv_tunnel, |
| .err_handler = vti4_err, |
| .priority = 0, |
| }; |
| |
| static int __net_init vti_init_net(struct net *net) |
| { |
| int err; |
| struct ip_tunnel_net *itn; |
| |
| err = ip_tunnel_init_net(net, vti_net_id, &vti_link_ops, "ip_vti0"); |
| if (err) |
| return err; |
| itn = net_generic(net, vti_net_id); |
| if (itn->fb_tunnel_dev) |
| vti_fb_tunnel_init(itn->fb_tunnel_dev); |
| return 0; |
| } |
| |
| static void __net_exit vti_exit_batch_net(struct list_head *list_net) |
| { |
| ip_tunnel_delete_nets(list_net, vti_net_id, &vti_link_ops); |
| } |
| |
| static struct pernet_operations vti_net_ops = { |
| .init = vti_init_net, |
| .exit_batch = vti_exit_batch_net, |
| .id = &vti_net_id, |
| .size = sizeof(struct ip_tunnel_net), |
| }; |
| |
| static int vti_tunnel_validate(struct nlattr *tb[], struct nlattr *data[], |
| struct netlink_ext_ack *extack) |
| { |
| return 0; |
| } |
| |
| static void vti_netlink_parms(struct nlattr *data[], |
| struct ip_tunnel_parm *parms, |
| __u32 *fwmark) |
| { |
| memset(parms, 0, sizeof(*parms)); |
| |
| parms->iph.protocol = IPPROTO_IPIP; |
| |
| if (!data) |
| return; |
| |
| parms->i_flags = VTI_ISVTI; |
| |
| if (data[IFLA_VTI_LINK]) |
| parms->link = nla_get_u32(data[IFLA_VTI_LINK]); |
| |
| if (data[IFLA_VTI_IKEY]) |
| parms->i_key = nla_get_be32(data[IFLA_VTI_IKEY]); |
| |
| if (data[IFLA_VTI_OKEY]) |
| parms->o_key = nla_get_be32(data[IFLA_VTI_OKEY]); |
| |
| if (data[IFLA_VTI_LOCAL]) |
| parms->iph.saddr = nla_get_in_addr(data[IFLA_VTI_LOCAL]); |
| |
| if (data[IFLA_VTI_REMOTE]) |
| parms->iph.daddr = nla_get_in_addr(data[IFLA_VTI_REMOTE]); |
| |
| if (data[IFLA_VTI_FWMARK]) |
| *fwmark = nla_get_u32(data[IFLA_VTI_FWMARK]); |
| } |
| |
| static int vti_newlink(struct net *src_net, struct net_device *dev, |
| struct nlattr *tb[], struct nlattr *data[], |
| struct netlink_ext_ack *extack) |
| { |
| struct ip_tunnel_parm parms; |
| __u32 fwmark = 0; |
| |
| vti_netlink_parms(data, &parms, &fwmark); |
| return ip_tunnel_newlink(dev, tb, &parms, fwmark); |
| } |
| |
| static int vti_changelink(struct net_device *dev, struct nlattr *tb[], |
| struct nlattr *data[], |
| struct netlink_ext_ack *extack) |
| { |
| struct ip_tunnel *t = netdev_priv(dev); |
| __u32 fwmark = t->fwmark; |
| struct ip_tunnel_parm p; |
| |
| vti_netlink_parms(data, &p, &fwmark); |
| return ip_tunnel_changelink(dev, tb, &p, fwmark); |
| } |
| |
| static size_t vti_get_size(const struct net_device *dev) |
| { |
| return |
| /* IFLA_VTI_LINK */ |
| nla_total_size(4) + |
| /* IFLA_VTI_IKEY */ |
| nla_total_size(4) + |
| /* IFLA_VTI_OKEY */ |
| nla_total_size(4) + |
| /* IFLA_VTI_LOCAL */ |
| nla_total_size(4) + |
| /* IFLA_VTI_REMOTE */ |
| nla_total_size(4) + |
| /* IFLA_VTI_FWMARK */ |
| nla_total_size(4) + |
| 0; |
| } |
| |
| static int vti_fill_info(struct sk_buff *skb, const struct net_device *dev) |
| { |
| struct ip_tunnel *t = netdev_priv(dev); |
| struct ip_tunnel_parm *p = &t->parms; |
| |
| if (nla_put_u32(skb, IFLA_VTI_LINK, p->link) || |
| nla_put_be32(skb, IFLA_VTI_IKEY, p->i_key) || |
| nla_put_be32(skb, IFLA_VTI_OKEY, p->o_key) || |
| nla_put_in_addr(skb, IFLA_VTI_LOCAL, p->iph.saddr) || |
| nla_put_in_addr(skb, IFLA_VTI_REMOTE, p->iph.daddr) || |
| nla_put_u32(skb, IFLA_VTI_FWMARK, t->fwmark)) |
| return -EMSGSIZE; |
| |
| return 0; |
| } |
| |
| static const struct nla_policy vti_policy[IFLA_VTI_MAX + 1] = { |
| [IFLA_VTI_LINK] = { .type = NLA_U32 }, |
| [IFLA_VTI_IKEY] = { .type = NLA_U32 }, |
| [IFLA_VTI_OKEY] = { .type = NLA_U32 }, |
| [IFLA_VTI_LOCAL] = { .len = sizeof_field(struct iphdr, saddr) }, |
| [IFLA_VTI_REMOTE] = { .len = sizeof_field(struct iphdr, daddr) }, |
| [IFLA_VTI_FWMARK] = { .type = NLA_U32 }, |
| }; |
| |
| static struct rtnl_link_ops vti_link_ops __read_mostly = { |
| .kind = "vti", |
| .maxtype = IFLA_VTI_MAX, |
| .policy = vti_policy, |
| .priv_size = sizeof(struct ip_tunnel), |
| .setup = vti_tunnel_setup, |
| .validate = vti_tunnel_validate, |
| .newlink = vti_newlink, |
| .changelink = vti_changelink, |
| .dellink = ip_tunnel_dellink, |
| .get_size = vti_get_size, |
| .fill_info = vti_fill_info, |
| .get_link_net = ip_tunnel_get_link_net, |
| }; |
| |
| static int __init vti_init(void) |
| { |
| const char *msg; |
| int err; |
| |
| pr_info("IPv4 over IPsec tunneling driver\n"); |
| |
| msg = "tunnel device"; |
| err = register_pernet_device(&vti_net_ops); |
| if (err < 0) |
| goto pernet_dev_failed; |
| |
| msg = "tunnel protocols"; |
| err = xfrm4_protocol_register(&vti_esp4_protocol, IPPROTO_ESP); |
| if (err < 0) |
| goto xfrm_proto_esp_failed; |
| err = xfrm4_protocol_register(&vti_ah4_protocol, IPPROTO_AH); |
| if (err < 0) |
| goto xfrm_proto_ah_failed; |
| err = xfrm4_protocol_register(&vti_ipcomp4_protocol, IPPROTO_COMP); |
| if (err < 0) |
| goto xfrm_proto_comp_failed; |
| |
| msg = "ipip tunnel"; |
| err = xfrm4_tunnel_register(&ipip_handler, AF_INET); |
| if (err < 0) |
| goto xfrm_tunnel_failed; |
| |
| msg = "netlink interface"; |
| err = rtnl_link_register(&vti_link_ops); |
| if (err < 0) |
| goto rtnl_link_failed; |
| |
| return err; |
| |
| rtnl_link_failed: |
| xfrm4_tunnel_deregister(&ipip_handler, AF_INET); |
| xfrm_tunnel_failed: |
| xfrm4_protocol_deregister(&vti_ipcomp4_protocol, IPPROTO_COMP); |
| xfrm_proto_comp_failed: |
| xfrm4_protocol_deregister(&vti_ah4_protocol, IPPROTO_AH); |
| xfrm_proto_ah_failed: |
| xfrm4_protocol_deregister(&vti_esp4_protocol, IPPROTO_ESP); |
| xfrm_proto_esp_failed: |
| unregister_pernet_device(&vti_net_ops); |
| pernet_dev_failed: |
| pr_err("vti init: failed to register %s\n", msg); |
| return err; |
| } |
| |
| static void __exit vti_fini(void) |
| { |
| rtnl_link_unregister(&vti_link_ops); |
| xfrm4_tunnel_deregister(&ipip_handler, AF_INET); |
| xfrm4_protocol_deregister(&vti_ipcomp4_protocol, IPPROTO_COMP); |
| xfrm4_protocol_deregister(&vti_ah4_protocol, IPPROTO_AH); |
| xfrm4_protocol_deregister(&vti_esp4_protocol, IPPROTO_ESP); |
| unregister_pernet_device(&vti_net_ops); |
| } |
| |
| module_init(vti_init); |
| module_exit(vti_fini); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS_RTNL_LINK("vti"); |
| MODULE_ALIAS_NETDEV("ip_vti0"); |