1 // SPDX-License-Identifier: GPL-2.0
3 * XFRM virtual interface
5 * Copyright (C) 2018 secunet Security Networks AG
8 * Steffen Klassert <steffen.klassert@secunet.com>
11 #include <linux/module.h>
12 #include <linux/capability.h>
13 #include <linux/errno.h>
14 #include <linux/types.h>
15 #include <linux/sockios.h>
16 #include <linux/icmp.h>
20 #include <linux/net.h>
21 #include <linux/in6.h>
22 #include <linux/netdevice.h>
23 #include <linux/if_link.h>
24 #include <linux/if_arp.h>
25 #include <linux/icmpv6.h>
26 #include <linux/init.h>
27 #include <linux/route.h>
28 #include <linux/rtnetlink.h>
29 #include <linux/netfilter_ipv6.h>
30 #include <linux/slab.h>
31 #include <linux/hash.h>
33 #include <linux/uaccess.h>
34 #include <linux/atomic.h>
39 #include <net/ip6_route.h>
40 #include <net/ip_tunnels.h>
41 #include <net/addrconf.h>
43 #include <net/net_namespace.h>
44 #include <net/netns/generic.h>
45 #include <linux/etherdevice.h>
47 static int xfrmi_dev_init(struct net_device *dev);
48 static void xfrmi_dev_setup(struct net_device *dev);
49 static struct rtnl_link_ops xfrmi_link_ops __read_mostly;
50 static unsigned int xfrmi_net_id __read_mostly;
51 static const struct net_device_ops xfrmi_netdev_ops;
53 #define XFRMI_HASH_BITS 8
54 #define XFRMI_HASH_SIZE BIT(XFRMI_HASH_BITS)
57 /* lists for storing interfaces in use */
58 struct xfrm_if __rcu *xfrmi[XFRMI_HASH_SIZE];
61 #define for_each_xfrmi_rcu(start, xi) \
62 for (xi = rcu_dereference(start); xi; xi = rcu_dereference(xi->next))
64 static u32 xfrmi_hash(u32 if_id)
66 return hash_32(if_id, XFRMI_HASH_BITS);
69 static struct xfrm_if *xfrmi_lookup(struct net *net, struct xfrm_state *x)
71 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
74 for_each_xfrmi_rcu(xfrmn->xfrmi[xfrmi_hash(x->if_id)], xi) {
75 if (x->if_id == xi->p.if_id &&
76 (xi->dev->flags & IFF_UP))
83 static struct xfrm_if *xfrmi_decode_session(struct sk_buff *skb,
84 unsigned short family)
86 struct net_device *dev;
89 if (!secpath_exists(skb) || !skb->dev)
94 ifindex = inet6_sdif(skb);
97 ifindex = inet_sdif(skb);
102 struct net *net = xs_net(xfrm_input_state(skb));
104 dev = dev_get_by_index_rcu(net, ifindex);
109 if (!dev || !(dev->flags & IFF_UP))
111 if (dev->netdev_ops != &xfrmi_netdev_ops)
114 return netdev_priv(dev);
117 static void xfrmi_link(struct xfrmi_net *xfrmn, struct xfrm_if *xi)
119 struct xfrm_if __rcu **xip = &xfrmn->xfrmi[xfrmi_hash(xi->p.if_id)];
121 rcu_assign_pointer(xi->next , rtnl_dereference(*xip));
122 rcu_assign_pointer(*xip, xi);
125 static void xfrmi_unlink(struct xfrmi_net *xfrmn, struct xfrm_if *xi)
127 struct xfrm_if __rcu **xip;
128 struct xfrm_if *iter;
130 for (xip = &xfrmn->xfrmi[xfrmi_hash(xi->p.if_id)];
131 (iter = rtnl_dereference(*xip)) != NULL;
134 rcu_assign_pointer(*xip, xi->next);
140 static void xfrmi_dev_free(struct net_device *dev)
142 struct xfrm_if *xi = netdev_priv(dev);
144 gro_cells_destroy(&xi->gro_cells);
145 free_percpu(dev->tstats);
148 static int xfrmi_create(struct net_device *dev)
150 struct xfrm_if *xi = netdev_priv(dev);
151 struct net *net = dev_net(dev);
152 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
155 dev->rtnl_link_ops = &xfrmi_link_ops;
156 err = register_netdevice(dev);
160 xfrmi_link(xfrmn, xi);
168 static struct xfrm_if *xfrmi_locate(struct net *net, struct xfrm_if_parms *p)
170 struct xfrm_if __rcu **xip;
172 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
174 for (xip = &xfrmn->xfrmi[xfrmi_hash(p->if_id)];
175 (xi = rtnl_dereference(*xip)) != NULL;
177 if (xi->p.if_id == p->if_id)
183 static void xfrmi_dev_uninit(struct net_device *dev)
185 struct xfrm_if *xi = netdev_priv(dev);
186 struct xfrmi_net *xfrmn = net_generic(xi->net, xfrmi_net_id);
188 xfrmi_unlink(xfrmn, xi);
191 static void xfrmi_scrub_packet(struct sk_buff *skb, bool xnet)
194 skb->pkt_type = PACKET_HOST;
210 static int xfrmi_input(struct sk_buff *skb, int nexthdr, __be32 spi,
211 int encap_type, unsigned short family)
215 sp = skb_sec_path(skb);
216 if (sp && (sp->len || sp->olen) &&
217 !xfrm_policy_check(NULL, XFRM_POLICY_IN, skb, family))
220 XFRM_SPI_SKB_CB(skb)->family = family;
221 if (family == AF_INET) {
222 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
223 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
225 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct ipv6hdr, daddr);
226 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6 = NULL;
229 return xfrm_input(skb, nexthdr, spi, encap_type);
235 static int xfrmi4_rcv(struct sk_buff *skb)
237 return xfrmi_input(skb, ip_hdr(skb)->protocol, 0, 0, AF_INET);
240 static int xfrmi6_rcv(struct sk_buff *skb)
242 return xfrmi_input(skb, skb_network_header(skb)[IP6CB(skb)->nhoff],
246 static int xfrmi4_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
248 return xfrmi_input(skb, nexthdr, spi, encap_type, AF_INET);
251 static int xfrmi6_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
253 return xfrmi_input(skb, nexthdr, spi, encap_type, AF_INET6);
256 static int xfrmi_rcv_cb(struct sk_buff *skb, int err)
258 const struct xfrm_mode *inner_mode;
259 struct net_device *dev;
260 struct xfrm_state *x;
264 if (err && !secpath_exists(skb))
267 x = xfrm_input_state(skb);
269 xi = xfrmi_lookup(xs_net(x), x);
277 DEV_STATS_INC(dev, rx_errors);
278 DEV_STATS_INC(dev, rx_dropped);
283 xnet = !net_eq(xi->net, dev_net(skb->dev));
286 inner_mode = &x->inner_mode;
288 if (x->sel.family == AF_UNSPEC) {
289 inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol);
290 if (inner_mode == NULL) {
291 XFRM_INC_STATS(dev_net(skb->dev),
292 LINUX_MIB_XFRMINSTATEMODEERROR);
297 if (!xfrm_policy_check(NULL, XFRM_POLICY_IN, skb,
302 xfrmi_scrub_packet(skb, xnet);
303 dev_sw_netstats_rx_add(dev, skb->len);
309 xfrmi_xmit2(struct sk_buff *skb, struct net_device *dev, struct flowi *fl)
311 struct xfrm_if *xi = netdev_priv(dev);
312 struct dst_entry *dst = skb_dst(skb);
313 unsigned int length = skb->len;
314 struct net_device *tdev;
315 struct xfrm_state *x;
320 dst = xfrm_lookup_with_ifid(xi->net, dst, fl, NULL, 0, xi->p.if_id);
324 goto tx_err_link_failure;
329 goto tx_err_link_failure;
331 if (x->if_id != xi->p.if_id)
332 goto tx_err_link_failure;
337 DEV_STATS_INC(dev, collisions);
338 net_warn_ratelimited("%s: Local routing loop detected!\n",
340 goto tx_err_dst_release;
344 if ((!skb_is_gso(skb) && skb->len > mtu) ||
345 (skb_is_gso(skb) && !skb_gso_validate_network_len(skb, mtu))) {
346 skb_dst_update_pmtu_no_confirm(skb, mtu);
348 if (skb->protocol == htons(ETH_P_IPV6)) {
349 if (mtu < IPV6_MIN_MTU)
353 icmpv6_ndo_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
357 if (!(ip_hdr(skb)->frag_off & htons(IP_DF)))
359 icmp_ndo_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
368 xfrmi_scrub_packet(skb, !net_eq(xi->net, dev_net(dev)));
369 skb_dst_set(skb, dst);
372 err = dst_output(xi->net, skb->sk, skb);
373 if (net_xmit_eval(err) == 0) {
374 dev_sw_netstats_tx_add(dev, 1, length);
376 DEV_STATS_INC(dev, tx_errors);
377 DEV_STATS_INC(dev, tx_aborted_errors);
382 DEV_STATS_INC(dev, tx_carrier_errors);
383 dst_link_failure(skb);
389 static netdev_tx_t xfrmi_xmit(struct sk_buff *skb, struct net_device *dev)
391 struct xfrm_if *xi = netdev_priv(dev);
392 struct dst_entry *dst = skb_dst(skb);
396 memset(&fl, 0, sizeof(fl));
398 switch (skb->protocol) {
399 case htons(ETH_P_IPV6):
400 memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
401 xfrm_decode_session(skb, &fl, AF_INET6);
403 fl.u.ip6.flowi6_oif = dev->ifindex;
404 fl.u.ip6.flowi6_flags |= FLOWI_FLAG_ANYSRC;
405 dst = ip6_route_output(dev_net(dev), NULL, &fl.u.ip6);
408 DEV_STATS_INC(dev, tx_carrier_errors);
411 skb_dst_set(skb, dst);
414 case htons(ETH_P_IP):
415 memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
416 xfrm_decode_session(skb, &fl, AF_INET);
420 fl.u.ip4.flowi4_oif = dev->ifindex;
421 fl.u.ip4.flowi4_flags |= FLOWI_FLAG_ANYSRC;
422 rt = __ip_route_output_key(dev_net(dev), &fl.u.ip4);
424 DEV_STATS_INC(dev, tx_carrier_errors);
427 skb_dst_set(skb, &rt->dst);
434 fl.flowi_oif = xi->p.link;
436 ret = xfrmi_xmit2(skb, dev, &fl);
443 DEV_STATS_INC(dev, tx_errors);
444 DEV_STATS_INC(dev, tx_dropped);
449 static int xfrmi4_err(struct sk_buff *skb, u32 info)
451 const struct iphdr *iph = (const struct iphdr *)skb->data;
452 struct net *net = dev_net(skb->dev);
453 int protocol = iph->protocol;
454 struct ip_comp_hdr *ipch;
455 struct ip_esp_hdr *esph;
456 struct ip_auth_hdr *ah ;
457 struct xfrm_state *x;
463 esph = (struct ip_esp_hdr *)(skb->data+(iph->ihl<<2));
467 ah = (struct ip_auth_hdr *)(skb->data+(iph->ihl<<2));
471 ipch = (struct ip_comp_hdr *)(skb->data+(iph->ihl<<2));
472 spi = htonl(ntohs(ipch->cpi));
478 switch (icmp_hdr(skb)->type) {
479 case ICMP_DEST_UNREACH:
480 if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
489 x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
490 spi, protocol, AF_INET);
494 xi = xfrmi_lookup(net, x);
500 if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH)
501 ipv4_update_pmtu(skb, net, info, 0, protocol);
503 ipv4_redirect(skb, net, 0, protocol);
509 static int xfrmi6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
510 u8 type, u8 code, int offset, __be32 info)
512 const struct ipv6hdr *iph = (const struct ipv6hdr *)skb->data;
513 struct net *net = dev_net(skb->dev);
514 int protocol = iph->nexthdr;
515 struct ip_comp_hdr *ipch;
516 struct ip_esp_hdr *esph;
517 struct ip_auth_hdr *ah;
518 struct xfrm_state *x;
524 esph = (struct ip_esp_hdr *)(skb->data + offset);
528 ah = (struct ip_auth_hdr *)(skb->data + offset);
532 ipch = (struct ip_comp_hdr *)(skb->data + offset);
533 spi = htonl(ntohs(ipch->cpi));
539 if (type != ICMPV6_PKT_TOOBIG &&
540 type != NDISC_REDIRECT)
543 x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
544 spi, protocol, AF_INET6);
548 xi = xfrmi_lookup(net, x);
554 if (type == NDISC_REDIRECT)
555 ip6_redirect(skb, net, skb->dev->ifindex, 0,
556 sock_net_uid(net, NULL));
558 ip6_update_pmtu(skb, net, info, 0, 0, sock_net_uid(net, NULL));
564 static int xfrmi_change(struct xfrm_if *xi, const struct xfrm_if_parms *p)
566 if (xi->p.link != p->link)
569 xi->p.if_id = p->if_id;
574 static int xfrmi_update(struct xfrm_if *xi, struct xfrm_if_parms *p)
576 struct net *net = xi->net;
577 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
580 xfrmi_unlink(xfrmn, xi);
582 err = xfrmi_change(xi, p);
583 xfrmi_link(xfrmn, xi);
584 netdev_state_change(xi->dev);
588 static int xfrmi_get_iflink(const struct net_device *dev)
590 struct xfrm_if *xi = netdev_priv(dev);
595 static const struct net_device_ops xfrmi_netdev_ops = {
596 .ndo_init = xfrmi_dev_init,
597 .ndo_uninit = xfrmi_dev_uninit,
598 .ndo_start_xmit = xfrmi_xmit,
599 .ndo_get_stats64 = dev_get_tstats64,
600 .ndo_get_iflink = xfrmi_get_iflink,
603 static void xfrmi_dev_setup(struct net_device *dev)
605 dev->netdev_ops = &xfrmi_netdev_ops;
606 dev->header_ops = &ip_tunnel_header_ops;
607 dev->type = ARPHRD_NONE;
608 dev->mtu = ETH_DATA_LEN;
609 dev->min_mtu = ETH_MIN_MTU;
610 dev->max_mtu = IP_MAX_MTU;
611 dev->flags = IFF_NOARP;
612 dev->needs_free_netdev = true;
613 dev->priv_destructor = xfrmi_dev_free;
616 eth_broadcast_addr(dev->broadcast);
619 #define XFRMI_FEATURES (NETIF_F_SG | \
621 NETIF_F_GSO_SOFTWARE | \
624 static int xfrmi_dev_init(struct net_device *dev)
626 struct xfrm_if *xi = netdev_priv(dev);
627 struct net_device *phydev = __dev_get_by_index(xi->net, xi->p.link);
630 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
634 err = gro_cells_init(&xi->gro_cells, dev);
636 free_percpu(dev->tstats);
640 dev->features |= NETIF_F_LLTX;
641 dev->features |= XFRMI_FEATURES;
642 dev->hw_features |= XFRMI_FEATURES;
645 dev->needed_headroom = phydev->needed_headroom;
646 dev->needed_tailroom = phydev->needed_tailroom;
648 if (is_zero_ether_addr(dev->dev_addr))
649 eth_hw_addr_inherit(dev, phydev);
650 if (is_zero_ether_addr(dev->broadcast))
651 memcpy(dev->broadcast, phydev->broadcast,
654 eth_hw_addr_random(dev);
655 eth_broadcast_addr(dev->broadcast);
661 static int xfrmi_validate(struct nlattr *tb[], struct nlattr *data[],
662 struct netlink_ext_ack *extack)
667 static void xfrmi_netlink_parms(struct nlattr *data[],
668 struct xfrm_if_parms *parms)
670 memset(parms, 0, sizeof(*parms));
675 if (data[IFLA_XFRM_LINK])
676 parms->link = nla_get_u32(data[IFLA_XFRM_LINK]);
678 if (data[IFLA_XFRM_IF_ID])
679 parms->if_id = nla_get_u32(data[IFLA_XFRM_IF_ID]);
682 static int xfrmi_newlink(struct net *src_net, struct net_device *dev,
683 struct nlattr *tb[], struct nlattr *data[],
684 struct netlink_ext_ack *extack)
686 struct net *net = dev_net(dev);
687 struct xfrm_if_parms p = {};
691 xfrmi_netlink_parms(data, &p);
693 NL_SET_ERR_MSG(extack, "if_id must be non zero");
697 xi = xfrmi_locate(net, &p);
701 xi = netdev_priv(dev);
706 err = xfrmi_create(dev);
710 static void xfrmi_dellink(struct net_device *dev, struct list_head *head)
712 unregister_netdevice_queue(dev, head);
715 static int xfrmi_changelink(struct net_device *dev, struct nlattr *tb[],
716 struct nlattr *data[],
717 struct netlink_ext_ack *extack)
719 struct xfrm_if *xi = netdev_priv(dev);
720 struct net *net = xi->net;
721 struct xfrm_if_parms p = {};
723 xfrmi_netlink_parms(data, &p);
725 NL_SET_ERR_MSG(extack, "if_id must be non zero");
729 xi = xfrmi_locate(net, &p);
731 xi = netdev_priv(dev);
737 return xfrmi_update(xi, &p);
740 static size_t xfrmi_get_size(const struct net_device *dev)
745 /* IFLA_XFRM_IF_ID */
750 static int xfrmi_fill_info(struct sk_buff *skb, const struct net_device *dev)
752 struct xfrm_if *xi = netdev_priv(dev);
753 struct xfrm_if_parms *parm = &xi->p;
755 if (nla_put_u32(skb, IFLA_XFRM_LINK, parm->link) ||
756 nla_put_u32(skb, IFLA_XFRM_IF_ID, parm->if_id))
757 goto nla_put_failure;
764 static struct net *xfrmi_get_link_net(const struct net_device *dev)
766 struct xfrm_if *xi = netdev_priv(dev);
771 static const struct nla_policy xfrmi_policy[IFLA_XFRM_MAX + 1] = {
772 [IFLA_XFRM_LINK] = { .type = NLA_U32 },
773 [IFLA_XFRM_IF_ID] = { .type = NLA_U32 },
776 static struct rtnl_link_ops xfrmi_link_ops __read_mostly = {
778 .maxtype = IFLA_XFRM_MAX,
779 .policy = xfrmi_policy,
780 .priv_size = sizeof(struct xfrm_if),
781 .setup = xfrmi_dev_setup,
782 .validate = xfrmi_validate,
783 .newlink = xfrmi_newlink,
784 .dellink = xfrmi_dellink,
785 .changelink = xfrmi_changelink,
786 .get_size = xfrmi_get_size,
787 .fill_info = xfrmi_fill_info,
788 .get_link_net = xfrmi_get_link_net,
791 static void __net_exit xfrmi_exit_batch_net(struct list_head *net_exit_list)
797 list_for_each_entry(net, net_exit_list, exit_list) {
798 struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
799 struct xfrm_if __rcu **xip;
803 for (i = 0; i < XFRMI_HASH_SIZE; i++) {
804 for (xip = &xfrmn->xfrmi[i];
805 (xi = rtnl_dereference(*xip)) != NULL;
807 unregister_netdevice_queue(xi->dev, &list);
810 unregister_netdevice_many(&list);
814 static struct pernet_operations xfrmi_net_ops = {
815 .exit_batch = xfrmi_exit_batch_net,
817 .size = sizeof(struct xfrmi_net),
820 static struct xfrm6_protocol xfrmi_esp6_protocol __read_mostly = {
821 .handler = xfrmi6_rcv,
822 .input_handler = xfrmi6_input,
823 .cb_handler = xfrmi_rcv_cb,
824 .err_handler = xfrmi6_err,
828 static struct xfrm6_protocol xfrmi_ah6_protocol __read_mostly = {
829 .handler = xfrm6_rcv,
830 .input_handler = xfrm_input,
831 .cb_handler = xfrmi_rcv_cb,
832 .err_handler = xfrmi6_err,
836 static struct xfrm6_protocol xfrmi_ipcomp6_protocol __read_mostly = {
837 .handler = xfrm6_rcv,
838 .input_handler = xfrm_input,
839 .cb_handler = xfrmi_rcv_cb,
840 .err_handler = xfrmi6_err,
844 #if IS_REACHABLE(CONFIG_INET6_XFRM_TUNNEL)
845 static int xfrmi6_rcv_tunnel(struct sk_buff *skb)
847 const xfrm_address_t *saddr;
850 saddr = (const xfrm_address_t *)&ipv6_hdr(skb)->saddr;
851 spi = xfrm6_tunnel_spi_lookup(dev_net(skb->dev), saddr);
853 return xfrm6_rcv_spi(skb, IPPROTO_IPV6, spi, NULL);
856 static struct xfrm6_tunnel xfrmi_ipv6_handler __read_mostly = {
857 .handler = xfrmi6_rcv_tunnel,
858 .cb_handler = xfrmi_rcv_cb,
859 .err_handler = xfrmi6_err,
863 static struct xfrm6_tunnel xfrmi_ip6ip_handler __read_mostly = {
864 .handler = xfrmi6_rcv_tunnel,
865 .cb_handler = xfrmi_rcv_cb,
866 .err_handler = xfrmi6_err,
871 static struct xfrm4_protocol xfrmi_esp4_protocol __read_mostly = {
872 .handler = xfrmi4_rcv,
873 .input_handler = xfrmi4_input,
874 .cb_handler = xfrmi_rcv_cb,
875 .err_handler = xfrmi4_err,
879 static struct xfrm4_protocol xfrmi_ah4_protocol __read_mostly = {
880 .handler = xfrm4_rcv,
881 .input_handler = xfrm_input,
882 .cb_handler = xfrmi_rcv_cb,
883 .err_handler = xfrmi4_err,
887 static struct xfrm4_protocol xfrmi_ipcomp4_protocol __read_mostly = {
888 .handler = xfrm4_rcv,
889 .input_handler = xfrm_input,
890 .cb_handler = xfrmi_rcv_cb,
891 .err_handler = xfrmi4_err,
895 #if IS_REACHABLE(CONFIG_INET_XFRM_TUNNEL)
896 static int xfrmi4_rcv_tunnel(struct sk_buff *skb)
898 return xfrm4_rcv_spi(skb, IPPROTO_IPIP, ip_hdr(skb)->saddr);
901 static struct xfrm_tunnel xfrmi_ipip_handler __read_mostly = {
902 .handler = xfrmi4_rcv_tunnel,
903 .cb_handler = xfrmi_rcv_cb,
904 .err_handler = xfrmi4_err,
908 static struct xfrm_tunnel xfrmi_ipip6_handler __read_mostly = {
909 .handler = xfrmi4_rcv_tunnel,
910 .cb_handler = xfrmi_rcv_cb,
911 .err_handler = xfrmi4_err,
916 static int __init xfrmi4_init(void)
920 err = xfrm4_protocol_register(&xfrmi_esp4_protocol, IPPROTO_ESP);
922 goto xfrm_proto_esp_failed;
923 err = xfrm4_protocol_register(&xfrmi_ah4_protocol, IPPROTO_AH);
925 goto xfrm_proto_ah_failed;
926 err = xfrm4_protocol_register(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
928 goto xfrm_proto_comp_failed;
929 #if IS_REACHABLE(CONFIG_INET_XFRM_TUNNEL)
930 err = xfrm4_tunnel_register(&xfrmi_ipip_handler, AF_INET);
932 goto xfrm_tunnel_ipip_failed;
933 err = xfrm4_tunnel_register(&xfrmi_ipip6_handler, AF_INET6);
935 goto xfrm_tunnel_ipip6_failed;
940 #if IS_REACHABLE(CONFIG_INET_XFRM_TUNNEL)
941 xfrm_tunnel_ipip6_failed:
942 xfrm4_tunnel_deregister(&xfrmi_ipip_handler, AF_INET);
943 xfrm_tunnel_ipip_failed:
944 xfrm4_protocol_deregister(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
946 xfrm_proto_comp_failed:
947 xfrm4_protocol_deregister(&xfrmi_ah4_protocol, IPPROTO_AH);
948 xfrm_proto_ah_failed:
949 xfrm4_protocol_deregister(&xfrmi_esp4_protocol, IPPROTO_ESP);
950 xfrm_proto_esp_failed:
954 static void xfrmi4_fini(void)
956 #if IS_REACHABLE(CONFIG_INET_XFRM_TUNNEL)
957 xfrm4_tunnel_deregister(&xfrmi_ipip6_handler, AF_INET6);
958 xfrm4_tunnel_deregister(&xfrmi_ipip_handler, AF_INET);
960 xfrm4_protocol_deregister(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
961 xfrm4_protocol_deregister(&xfrmi_ah4_protocol, IPPROTO_AH);
962 xfrm4_protocol_deregister(&xfrmi_esp4_protocol, IPPROTO_ESP);
965 static int __init xfrmi6_init(void)
969 err = xfrm6_protocol_register(&xfrmi_esp6_protocol, IPPROTO_ESP);
971 goto xfrm_proto_esp_failed;
972 err = xfrm6_protocol_register(&xfrmi_ah6_protocol, IPPROTO_AH);
974 goto xfrm_proto_ah_failed;
975 err = xfrm6_protocol_register(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
977 goto xfrm_proto_comp_failed;
978 #if IS_REACHABLE(CONFIG_INET6_XFRM_TUNNEL)
979 err = xfrm6_tunnel_register(&xfrmi_ipv6_handler, AF_INET6);
981 goto xfrm_tunnel_ipv6_failed;
982 err = xfrm6_tunnel_register(&xfrmi_ip6ip_handler, AF_INET);
984 goto xfrm_tunnel_ip6ip_failed;
989 #if IS_REACHABLE(CONFIG_INET6_XFRM_TUNNEL)
990 xfrm_tunnel_ip6ip_failed:
991 xfrm6_tunnel_deregister(&xfrmi_ipv6_handler, AF_INET6);
992 xfrm_tunnel_ipv6_failed:
993 xfrm6_protocol_deregister(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
995 xfrm_proto_comp_failed:
996 xfrm6_protocol_deregister(&xfrmi_ah6_protocol, IPPROTO_AH);
997 xfrm_proto_ah_failed:
998 xfrm6_protocol_deregister(&xfrmi_esp6_protocol, IPPROTO_ESP);
999 xfrm_proto_esp_failed:
1003 static void xfrmi6_fini(void)
1005 #if IS_REACHABLE(CONFIG_INET6_XFRM_TUNNEL)
1006 xfrm6_tunnel_deregister(&xfrmi_ip6ip_handler, AF_INET);
1007 xfrm6_tunnel_deregister(&xfrmi_ipv6_handler, AF_INET6);
1009 xfrm6_protocol_deregister(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
1010 xfrm6_protocol_deregister(&xfrmi_ah6_protocol, IPPROTO_AH);
1011 xfrm6_protocol_deregister(&xfrmi_esp6_protocol, IPPROTO_ESP);
1014 static const struct xfrm_if_cb xfrm_if_cb = {
1015 .decode_session = xfrmi_decode_session,
1018 static int __init xfrmi_init(void)
1023 pr_info("IPsec XFRM device driver\n");
1025 msg = "tunnel device";
1026 err = register_pernet_device(&xfrmi_net_ops);
1028 goto pernet_dev_failed;
1030 msg = "xfrm4 protocols";
1031 err = xfrmi4_init();
1035 msg = "xfrm6 protocols";
1036 err = xfrmi6_init();
1041 msg = "netlink interface";
1042 err = rtnl_link_register(&xfrmi_link_ops);
1044 goto rtnl_link_failed;
1046 xfrm_if_register_cb(&xfrm_if_cb);
1055 unregister_pernet_device(&xfrmi_net_ops);
1057 pr_err("xfrmi init: failed to register %s\n", msg);
1061 static void __exit xfrmi_fini(void)
1063 xfrm_if_unregister_cb();
1064 rtnl_link_unregister(&xfrmi_link_ops);
1067 unregister_pernet_device(&xfrmi_net_ops);
1070 module_init(xfrmi_init);
1071 module_exit(xfrmi_fini);
1072 MODULE_LICENSE("GPL");
1073 MODULE_ALIAS_RTNL_LINK("xfrm");
1074 MODULE_ALIAS_NETDEV("xfrm0");
1075 MODULE_AUTHOR("Steffen Klassert");
1076 MODULE_DESCRIPTION("XFRM virtual interface");