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net/ipv6/ip6_tunnel.c
58.2 KB
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// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* IPv6 tunneling device |
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* Linux INET6 implementation * * Authors: |
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* Ville Nuorvala <vnuorval@tcs.hut.fi> |
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* Yasuyuki Kozakai <kozakai@linux-ipv6.org> |
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* |
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* Based on: |
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* linux/net/ipv6/sit.c and linux/net/ipv4/ipip.c |
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* * RFC 2473 |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/module.h> |
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#include <linux/capability.h> |
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#include <linux/errno.h> #include <linux/types.h> #include <linux/sockios.h> |
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#include <linux/icmp.h> |
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#include <linux/if.h> #include <linux/in.h> #include <linux/ip.h> |
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#include <linux/net.h> #include <linux/in6.h> #include <linux/netdevice.h> #include <linux/if_arp.h> #include <linux/icmpv6.h> #include <linux/init.h> #include <linux/route.h> #include <linux/rtnetlink.h> #include <linux/netfilter_ipv6.h> |
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#include <linux/slab.h> |
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#include <linux/hash.h> |
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#include <linux/etherdevice.h> |
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|
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#include <linux/uaccess.h> |
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#include <linux/atomic.h> |
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#include <net/icmp.h> |
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#include <net/ip.h> |
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#include <net/ip_tunnels.h> |
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#include <net/ipv6.h> |
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#include <net/ip6_route.h> #include <net/addrconf.h> #include <net/ip6_tunnel.h> #include <net/xfrm.h> #include <net/dsfield.h> #include <net/inet_ecn.h> |
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#include <net/net_namespace.h> #include <net/netns/generic.h> |
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#include <net/dst_metadata.h> |
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MODULE_AUTHOR("Ville Nuorvala"); |
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MODULE_DESCRIPTION("IPv6 tunneling device"); |
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MODULE_LICENSE("GPL"); |
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MODULE_ALIAS_RTNL_LINK("ip6tnl"); |
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MODULE_ALIAS_NETDEV("ip6tnl0"); |
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#define IP6_TUNNEL_HASH_SIZE_SHIFT 5 #define IP6_TUNNEL_HASH_SIZE (1 << IP6_TUNNEL_HASH_SIZE_SHIFT) |
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static bool log_ecn_error = true; module_param(log_ecn_error, bool, 0644); MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); |
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static u32 HASH(const struct in6_addr *addr1, const struct in6_addr *addr2) { u32 hash = ipv6_addr_hash(addr1) ^ ipv6_addr_hash(addr2); |
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return hash_32(hash, IP6_TUNNEL_HASH_SIZE_SHIFT); |
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} |
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|
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static int ip6_tnl_dev_init(struct net_device *dev); |
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static void ip6_tnl_dev_setup(struct net_device *dev); |
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static struct rtnl_link_ops ip6_link_ops __read_mostly; |
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static unsigned int ip6_tnl_net_id __read_mostly; |
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struct ip6_tnl_net { |
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/* the IPv6 tunnel fallback device */ struct net_device *fb_tnl_dev; |
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/* lists for storing tunnels in use */ |
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struct ip6_tnl __rcu *tnls_r_l[IP6_TUNNEL_HASH_SIZE]; |
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struct ip6_tnl __rcu *tnls_wc[1]; struct ip6_tnl __rcu **tnls[2]; |
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struct ip6_tnl __rcu *collect_md_tun; |
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}; |
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static inline int ip6_tnl_mpls_supported(void) { return IS_ENABLED(CONFIG_MPLS); } |
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static struct net_device_stats *ip6_get_stats(struct net_device *dev) { |
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struct pcpu_sw_netstats tmp, sum = { 0 }; |
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int i; for_each_possible_cpu(i) { |
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unsigned int start; |
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const struct pcpu_sw_netstats *tstats = per_cpu_ptr(dev->tstats, i); |
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|
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do { |
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start = u64_stats_fetch_begin_irq(&tstats->syncp); |
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tmp.rx_packets = tstats->rx_packets; tmp.rx_bytes = tstats->rx_bytes; tmp.tx_packets = tstats->tx_packets; tmp.tx_bytes = tstats->tx_bytes; |
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} while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); |
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sum.rx_packets += tmp.rx_packets; sum.rx_bytes += tmp.rx_bytes; sum.tx_packets += tmp.tx_packets; sum.tx_bytes += tmp.tx_bytes; |
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} dev->stats.rx_packets = sum.rx_packets; dev->stats.rx_bytes = sum.rx_bytes; dev->stats.tx_packets = sum.tx_packets; dev->stats.tx_bytes = sum.tx_bytes; return &dev->stats; } |
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#define for_each_ip6_tunnel_rcu(start) \ for (t = rcu_dereference(start); t; t = rcu_dereference(t->next)) |
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/** |
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* ip6_tnl_lookup - fetch tunnel matching the end-point addresses |
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* @net: network namespace |
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* @link: ifindex of underlying interface |
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* @remote: the address of the tunnel exit-point * @local: the address of the tunnel entry-point |
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* |
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* Return: |
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* tunnel matching given end-points if found, |
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* else fallback tunnel if its device is up, |
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* else %NULL **/ static struct ip6_tnl * |
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ip6_tnl_lookup(struct net *net, int link, const struct in6_addr *remote, const struct in6_addr *local) |
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{ |
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unsigned int hash = HASH(remote, local); |
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struct ip6_tnl *t, *cand = NULL; |
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struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
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struct in6_addr any; |
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for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[hash]) { |
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if (!ipv6_addr_equal(local, &t->parms.laddr) || !ipv6_addr_equal(remote, &t->parms.raddr) || !(t->dev->flags & IFF_UP)) continue; if (link == t->parms.link) |
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return t; |
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else cand = t; |
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} |
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memset(&any, 0, sizeof(any)); hash = HASH(&any, local); for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[hash]) { |
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if (!ipv6_addr_equal(local, &t->parms.laddr) || !ipv6_addr_any(&t->parms.raddr) || !(t->dev->flags & IFF_UP)) continue; if (link == t->parms.link) |
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return t; |
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else if (!cand) cand = t; |
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} hash = HASH(remote, &any); for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[hash]) { |
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if (!ipv6_addr_equal(remote, &t->parms.raddr) || !ipv6_addr_any(&t->parms.laddr) || !(t->dev->flags & IFF_UP)) continue; if (link == t->parms.link) |
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return t; |
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else if (!cand) cand = t; |
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} |
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if (cand) return cand; |
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t = rcu_dereference(ip6n->collect_md_tun); |
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if (t && t->dev->flags & IFF_UP) |
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return t; |
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t = rcu_dereference(ip6n->tnls_wc[0]); if (t && (t->dev->flags & IFF_UP)) |
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return t; return NULL; } /** |
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* ip6_tnl_bucket - get head of list matching given tunnel parameters |
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* @p: parameters containing tunnel end-points |
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* * Description: |
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* ip6_tnl_bucket() returns the head of the list matching the |
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* &struct in6_addr entries laddr and raddr in @p. * |
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* Return: head of IPv6 tunnel list |
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**/ |
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static struct ip6_tnl __rcu ** |
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ip6_tnl_bucket(struct ip6_tnl_net *ip6n, const struct __ip6_tnl_parm *p) |
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{ |
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const struct in6_addr *remote = &p->raddr; const struct in6_addr *local = &p->laddr; |
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unsigned int h = 0; |
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int prio = 0; if (!ipv6_addr_any(remote) || !ipv6_addr_any(local)) { prio = 1; |
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h = HASH(remote, local); |
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} |
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return &ip6n->tnls[prio][h]; |
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} /** |
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* ip6_tnl_link - add tunnel to hash table |
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* @t: tunnel to be added **/ static void |
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ip6_tnl_link(struct ip6_tnl_net *ip6n, struct ip6_tnl *t) |
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{ |
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struct ip6_tnl __rcu **tp = ip6_tnl_bucket(ip6n, &t->parms); |
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|
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if (t->parms.collect_md) rcu_assign_pointer(ip6n->collect_md_tun, t); |
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rcu_assign_pointer(t->next , rtnl_dereference(*tp)); rcu_assign_pointer(*tp, t); |
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} /** |
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* ip6_tnl_unlink - remove tunnel from hash table |
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* @t: tunnel to be removed **/ static void |
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ip6_tnl_unlink(struct ip6_tnl_net *ip6n, struct ip6_tnl *t) |
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{ |
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struct ip6_tnl __rcu **tp; struct ip6_tnl *iter; |
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if (t->parms.collect_md) rcu_assign_pointer(ip6n->collect_md_tun, NULL); |
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for (tp = ip6_tnl_bucket(ip6n, &t->parms); (iter = rtnl_dereference(*tp)) != NULL; tp = &iter->next) { if (t == iter) { |
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rcu_assign_pointer(*tp, t->next); |
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break; } } } |
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static void ip6_dev_free(struct net_device *dev) { |
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struct ip6_tnl *t = netdev_priv(dev); |
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gro_cells_destroy(&t->gro_cells); |
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dst_cache_destroy(&t->dst_cache); |
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free_percpu(dev->tstats); |
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} |
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static int ip6_tnl_create2(struct net_device *dev) { struct ip6_tnl *t = netdev_priv(dev); struct net *net = dev_net(dev); struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); int err; t = netdev_priv(dev); |
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dev->rtnl_link_ops = &ip6_link_ops; |
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err = register_netdevice(dev); if (err < 0) goto out; strcpy(t->parms.name, dev->name); |
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dev_hold(dev); ip6_tnl_link(ip6n, t); return 0; out: return err; } |
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/** |
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* ip6_tnl_create - create a new tunnel |
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* @net: network namespace |
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* @p: tunnel parameters |
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* * Description: * Create tunnel matching given parameters. |
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* * Return: |
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* created tunnel or error pointer |
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**/ |
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static struct ip6_tnl *ip6_tnl_create(struct net *net, struct __ip6_tnl_parm *p) |
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{ struct net_device *dev; struct ip6_tnl *t; char name[IFNAMSIZ]; |
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int err = -E2BIG; |
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|
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if (p->name[0]) { if (!dev_valid_name(p->name)) goto failed; |
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strlcpy(name, p->name, IFNAMSIZ); |
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} else { |
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sprintf(name, "ip6tnl%%d"); |
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} err = -ENOMEM; |
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dev = alloc_netdev(sizeof(*t), name, NET_NAME_UNKNOWN, ip6_tnl_dev_setup); |
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if (!dev) |
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goto failed; |
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dev_net_set(dev, net); |
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t = netdev_priv(dev); |
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t->parms = *p; |
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t->net = dev_net(dev); |
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err = ip6_tnl_create2(dev); |
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if (err < 0) goto failed_free; |
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return t; |
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failed_free: |
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free_netdev(dev); |
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failed: |
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return ERR_PTR(err); |
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} /** |
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* ip6_tnl_locate - find or create tunnel matching given parameters |
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* @net: network namespace |
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* @p: tunnel parameters |
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* @create: != 0 if allowed to create new tunnel if no match found * * Description: |
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* ip6_tnl_locate() first tries to locate an existing tunnel |
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* based on @parms. If this is unsuccessful, but @create is set a new * tunnel device is created and registered for use. * * Return: |
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* matching tunnel or error pointer |
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**/ |
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static struct ip6_tnl *ip6_tnl_locate(struct net *net, |
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struct __ip6_tnl_parm *p, int create) |
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{ |
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const struct in6_addr *remote = &p->raddr; const struct in6_addr *local = &p->laddr; |
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struct ip6_tnl __rcu **tp; |
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struct ip6_tnl *t; |
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struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
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|
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for (tp = ip6_tnl_bucket(ip6n, p); (t = rtnl_dereference(*tp)) != NULL; tp = &t->next) { |
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if (ipv6_addr_equal(local, &t->parms.laddr) && |
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ipv6_addr_equal(remote, &t->parms.raddr) && p->link == t->parms.link) { |
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if (create) |
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return ERR_PTR(-EEXIST); |
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return t; |
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} |
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} if (!create) |
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return ERR_PTR(-ENODEV); |
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return ip6_tnl_create(net, p); |
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} /** |
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* ip6_tnl_dev_uninit - tunnel device uninitializer |
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* @dev: the device to be destroyed |
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* |
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* Description: |
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* ip6_tnl_dev_uninit() removes tunnel from its list |
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**/ static void |
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ip6_tnl_dev_uninit(struct net_device *dev) |
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{ |
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struct ip6_tnl *t = netdev_priv(dev); |
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struct net *net = t->net; |
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struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
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|
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if (dev == ip6n->fb_tnl_dev) |
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RCU_INIT_POINTER(ip6n->tnls_wc[0], NULL); |
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else |
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ip6_tnl_unlink(ip6n, t); |
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dst_cache_reset(&t->dst_cache); |
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dev_put(dev); } /** * parse_tvl_tnl_enc_lim - handle encapsulation limit option * @skb: received socket buffer * |
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* Return: * 0 if none was found, |
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* else index to encapsulation limit **/ |
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__u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw) |
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{ |
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const struct ipv6hdr *ipv6h = (const struct ipv6hdr *)raw; unsigned int nhoff = raw - skb->data; unsigned int off = nhoff + sizeof(*ipv6h); u8 next, nexthdr = ipv6h->nexthdr; |
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while (ipv6_ext_hdr(nexthdr) && nexthdr != NEXTHDR_NONE) { |
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412 |
struct ipv6_opt_hdr *hdr; |
fbfa743a9
|
413 414 415 |
u16 optlen; if (!pskb_may_pull(skb, off + sizeof(*hdr))) |
1da177e4c
|
416 |
break; |
fbfa743a9
|
417 |
hdr = (struct ipv6_opt_hdr *)(skb->data + off); |
1da177e4c
|
418 419 420 421 422 423 |
if (nexthdr == NEXTHDR_FRAGMENT) { struct frag_hdr *frag_hdr = (struct frag_hdr *) hdr; if (frag_hdr->frag_off) break; optlen = 8; } else if (nexthdr == NEXTHDR_AUTH) { |
416e8126a
|
424 |
optlen = ipv6_authlen(hdr); |
1da177e4c
|
425 426 427 |
} else { optlen = ipv6_optlen(hdr); } |
fbfa743a9
|
428 429 430 431 |
/* cache hdr->nexthdr, since pskb_may_pull() might * invalidate hdr */ next = hdr->nexthdr; |
1da177e4c
|
432 |
if (nexthdr == NEXTHDR_DEST) { |
fbfa743a9
|
433 434 435 436 437 |
u16 i = 2; /* Remember : hdr is no longer valid at this point. */ if (!pskb_may_pull(skb, off + optlen)) break; |
1da177e4c
|
438 439 440 441 |
while (1) { struct ipv6_tlv_tnl_enc_lim *tel; /* No more room for encapsulation limit */ |
fbfa743a9
|
442 |
if (i + sizeof(*tel) > optlen) |
1da177e4c
|
443 |
break; |
63117f09c
|
444 |
tel = (struct ipv6_tlv_tnl_enc_lim *)(skb->data + off + i); |
1da177e4c
|
445 446 447 |
/* return index of option if found and valid */ if (tel->type == IPV6_TLV_TNL_ENCAP_LIMIT && tel->length == 1) |
fbfa743a9
|
448 |
return i + off - nhoff; |
1da177e4c
|
449 450 451 452 453 454 455 |
/* else jump to next option */ if (tel->type) i += tel->length + 2; else i++; } } |
fbfa743a9
|
456 |
nexthdr = next; |
1da177e4c
|
457 458 459 460 |
off += optlen; } return 0; } |
c12b395a4
|
461 |
EXPORT_SYMBOL(ip6_tnl_parse_tlv_enc_lim); |
1da177e4c
|
462 463 |
/** |
e490d1d85
|
464 |
* ip6_tnl_err - tunnel error handler |
1da177e4c
|
465 466 |
* * Description: |
e490d1d85
|
467 |
* ip6_tnl_err() should handle errors in the tunnel according |
1da177e4c
|
468 469 |
* to the specifications in RFC 2473. **/ |
d2acc3479
|
470 |
static int |
502b09356
|
471 |
ip6_tnl_err(struct sk_buff *skb, __u8 ipproto, struct inet6_skb_parm *opt, |
d5fdd6bab
|
472 |
u8 *type, u8 *code, int *msg, __u32 *info, int offset) |
1da177e4c
|
473 |
{ |
383c1f887
|
474 475 |
const struct ipv6hdr *ipv6h = (const struct ipv6hdr *)skb->data; struct net *net = dev_net(skb->dev); |
d5fdd6bab
|
476 477 |
u8 rel_type = ICMPV6_DEST_UNREACH; u8 rel_code = ICMPV6_ADDR_UNREACH; |
1da177e4c
|
478 |
__u32 rel_info = 0; |
383c1f887
|
479 |
struct ip6_tnl *t; |
d2acc3479
|
480 |
int err = -ENOENT; |
383c1f887
|
481 482 483 |
int rel_msg = 0; u8 tproto; __u16 len; |
1da177e4c
|
484 |
|
1ab1457c4
|
485 486 |
/* If the packet doesn't contain the original IPv6 header we are in trouble since we might need the source address for further |
1da177e4c
|
487 |
processing of the error. */ |
2922bc8ae
|
488 |
rcu_read_lock(); |
5fdcce211
|
489 |
t = ip6_tnl_lookup(dev_net(skb->dev), skb->dev->ifindex, &ipv6h->daddr, &ipv6h->saddr); |
63159f29b
|
490 |
if (!t) |
1da177e4c
|
491 |
goto out; |
6aa7de059
|
492 |
tproto = READ_ONCE(t->parms.proto); |
acf722f73
|
493 |
if (tproto != ipproto && tproto != 0) |
502b09356
|
494 |
goto out; |
d2acc3479
|
495 |
err = 0; |
e490d1d85
|
496 |
switch (*type) { |
1da177e4c
|
497 |
case ICMPV6_DEST_UNREACH: |
17a10c921
|
498 499 500 |
net_dbg_ratelimited("%s: Path to destination invalid or inactive! ", t->parms.name); |
1da177e4c
|
501 502 503 |
rel_msg = 1; break; case ICMPV6_TIME_EXCEED: |
e490d1d85
|
504 |
if ((*code) == ICMPV6_EXC_HOPLIMIT) { |
17a10c921
|
505 506 507 |
net_dbg_ratelimited("%s: Too small hop limit or routing loop in tunnel! ", t->parms.name); |
1da177e4c
|
508 509 510 |
rel_msg = 1; } break; |
46d30cb10
|
511 512 513 |
case ICMPV6_PARAMPROB: { struct ipv6_tlv_tnl_enc_lim *tel; __u32 teli; |
107a5fe61
|
514 |
teli = 0; |
e490d1d85
|
515 |
if ((*code) == ICMPV6_HDR_FIELD) |
c12b395a4
|
516 |
teli = ip6_tnl_parse_tlv_enc_lim(skb, skb->data); |
1da177e4c
|
517 |
|
704eae1f3
|
518 |
if (teli && teli == *info - 2) { |
1da177e4c
|
519 520 |
tel = (struct ipv6_tlv_tnl_enc_lim *) &skb->data[teli]; if (tel->encap_limit == 0) { |
17a10c921
|
521 522 523 |
net_dbg_ratelimited("%s: Too small encapsulation limit or routing loop in tunnel! ", t->parms.name); |
1da177e4c
|
524 525 |
rel_msg = 1; } |
e87cc4728
|
526 |
} else { |
17a10c921
|
527 528 529 |
net_dbg_ratelimited("%s: Recipient unable to parse tunneled packet! ", t->parms.name); |
1da177e4c
|
530 531 |
} break; |
46d30cb10
|
532 533 534 |
} case ICMPV6_PKT_TOOBIG: { __u32 mtu; |
b00f54324
|
535 536 |
ip6_update_pmtu(skb, net, htonl(*info), 0, 0, sock_net_uid(net, NULL)); |
704eae1f3
|
537 |
mtu = *info - offset; |
1da177e4c
|
538 539 |
if (mtu < IPV6_MIN_MTU) mtu = IPV6_MIN_MTU; |
e5d08d718
|
540 541 |
len = sizeof(*ipv6h) + ntohs(ipv6h->payload_len); if (len > mtu) { |
1da177e4c
|
542 543 544 545 546 547 |
rel_type = ICMPV6_PKT_TOOBIG; rel_code = 0; rel_info = mtu; rel_msg = 1; } break; |
46d30cb10
|
548 |
} |
383c1f887
|
549 550 551 552 |
case NDISC_REDIRECT: ip6_redirect(skb, net, skb->dev->ifindex, 0, sock_net_uid(net, NULL)); break; |
1da177e4c
|
553 |
} |
e490d1d85
|
554 555 556 557 558 559 560 |
*type = rel_type; *code = rel_code; *info = rel_info; *msg = rel_msg; out: |
2922bc8ae
|
561 |
rcu_read_unlock(); |
e490d1d85
|
562 563 564 565 |
return err; } static int |
c4d3efafc
|
566 |
ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
d5fdd6bab
|
567 |
u8 type, u8 code, int offset, __be32 info) |
c4d3efafc
|
568 |
{ |
704eae1f3
|
569 |
__u32 rel_info = ntohl(info); |
b71d1d426
|
570 |
const struct iphdr *eiph; |
77552cfa3
|
571 572 573 574 |
struct sk_buff *skb2; int err, rel_msg = 0; u8 rel_type = type; u8 rel_code = code; |
c4d3efafc
|
575 |
struct rtable *rt; |
31e4543db
|
576 |
struct flowi4 fl4; |
c4d3efafc
|
577 |
|
502b09356
|
578 579 |
err = ip6_tnl_err(skb, IPPROTO_IPIP, opt, &rel_type, &rel_code, &rel_msg, &rel_info, offset); |
c4d3efafc
|
580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 |
if (err < 0) return err; if (rel_msg == 0) return 0; switch (rel_type) { case ICMPV6_DEST_UNREACH: if (rel_code != ICMPV6_ADDR_UNREACH) return 0; rel_type = ICMP_DEST_UNREACH; rel_code = ICMP_HOST_UNREACH; break; case ICMPV6_PKT_TOOBIG: if (rel_code != 0) return 0; rel_type = ICMP_DEST_UNREACH; rel_code = ICMP_FRAG_NEEDED; break; default: return 0; } if (!pskb_may_pull(skb, offset + sizeof(struct iphdr))) return 0; skb2 = skb_clone(skb, GFP_ATOMIC); if (!skb2) return 0; |
adf30907d
|
609 |
skb_dst_drop(skb2); |
c4d3efafc
|
610 |
skb_pull(skb2, offset); |
c1d2bbe1c
|
611 |
skb_reset_network_header(skb2); |
eddc9ec53
|
612 |
eiph = ip_hdr(skb2); |
c4d3efafc
|
613 614 |
/* Try to guess incoming interface */ |
77552cfa3
|
615 616 |
rt = ip_route_output_ports(dev_net(skb->dev), &fl4, NULL, eiph->saddr, 0, 0, 0, IPPROTO_IPIP, RT_TOS(eiph->tos), 0); |
b23dd4fe4
|
617 |
if (IS_ERR(rt)) |
c4d3efafc
|
618 |
goto out; |
d8d1f30b9
|
619 |
skb2->dev = rt->dst.dev; |
77552cfa3
|
620 |
ip_rt_put(rt); |
c4d3efafc
|
621 622 623 |
/* route "incoming" packet */ if (rt->rt_flags & RTCF_LOCAL) { |
31e4543db
|
624 |
rt = ip_route_output_ports(dev_net(skb->dev), &fl4, NULL, |
77552cfa3
|
625 626 |
eiph->daddr, eiph->saddr, 0, 0, IPPROTO_IPIP, RT_TOS(eiph->tos), 0); |
b2e54b09a
|
627 |
if (IS_ERR(rt) || rt->dst.dev->type != ARPHRD_TUNNEL6) { |
b23dd4fe4
|
628 629 |
if (!IS_ERR(rt)) ip_rt_put(rt); |
c4d3efafc
|
630 631 |
goto out; } |
b23dd4fe4
|
632 |
skb_dst_set(skb2, &rt->dst); |
c4d3efafc
|
633 |
} else { |
c4d3efafc
|
634 635 |
if (ip_route_input(skb2, eiph->daddr, eiph->saddr, eiph->tos, skb2->dev) || |
b2e54b09a
|
636 |
skb_dst(skb2)->dev->type != ARPHRD_TUNNEL6) |
c4d3efafc
|
637 638 639 640 641 |
goto out; } /* change mtu on this route */ if (rel_type == ICMP_DEST_UNREACH && rel_code == ICMP_FRAG_NEEDED) { |
adf30907d
|
642 |
if (rel_info > dst_mtu(skb_dst(skb2))) |
c4d3efafc
|
643 |
goto out; |
7a1592bcb
|
644 |
skb_dst_update_pmtu_no_confirm(skb2, rel_info); |
c4d3efafc
|
645 |
} |
704eae1f3
|
646 |
icmp_send(skb2, rel_type, rel_code, htonl(rel_info)); |
c4d3efafc
|
647 648 649 650 651 652 653 |
out: kfree_skb(skb2); return 0; } static int |
e490d1d85
|
654 |
ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
d5fdd6bab
|
655 |
u8 type, u8 code, int offset, __be32 info) |
e490d1d85
|
656 |
{ |
77552cfa3
|
657 658 |
__u32 rel_info = ntohl(info); int err, rel_msg = 0; |
d5fdd6bab
|
659 660 |
u8 rel_type = type; u8 rel_code = code; |
e490d1d85
|
661 |
|
502b09356
|
662 663 |
err = ip6_tnl_err(skb, IPPROTO_IPV6, opt, &rel_type, &rel_code, &rel_msg, &rel_info, offset); |
e490d1d85
|
664 665 666 667 |
if (err < 0) return err; if (rel_msg && pskb_may_pull(skb, offset + sizeof(struct ipv6hdr))) { |
1da177e4c
|
668 669 |
struct rt6_info *rt; struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); |
305d4b3ce
|
670 |
|
1da177e4c
|
671 |
if (!skb2) |
e490d1d85
|
672 |
return 0; |
1da177e4c
|
673 |
|
adf30907d
|
674 |
skb_dst_drop(skb2); |
1da177e4c
|
675 |
skb_pull(skb2, offset); |
c1d2bbe1c
|
676 |
skb_reset_network_header(skb2); |
1da177e4c
|
677 678 |
/* Try to guess incoming interface */ |
2f7f54b72
|
679 |
rt = rt6_lookup(dev_net(skb->dev), &ipv6_hdr(skb2)->saddr, |
b75cc8f90
|
680 |
NULL, 0, skb2, 0); |
1da177e4c
|
681 |
|
d19185428
|
682 683 |
if (rt && rt->dst.dev) skb2->dev = rt->dst.dev; |
1da177e4c
|
684 |
|
3ffe533c8
|
685 |
icmpv6_send(skb2, rel_type, rel_code, rel_info); |
1da177e4c
|
686 |
|
94e187c01
|
687 |
ip6_rt_put(rt); |
1da177e4c
|
688 689 690 |
kfree_skb(skb2); } |
e490d1d85
|
691 692 |
return 0; |
1da177e4c
|
693 |
} |
f200e98d9
|
694 695 696 697 698 699 700 701 702 703 704 705 706 |
static int mplsip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, u8 type, u8 code, int offset, __be32 info) { __u32 rel_info = ntohl(info); int err, rel_msg = 0; u8 rel_type = type; u8 rel_code = code; err = ip6_tnl_err(skb, IPPROTO_MPLS, opt, &rel_type, &rel_code, &rel_msg, &rel_info, offset); return err; } |
f4e0b4c5e
|
707 708 709 |
static int ip4ip6_dscp_ecn_decapsulate(const struct ip6_tnl *t, const struct ipv6hdr *ipv6h, struct sk_buff *skb) |
c4d3efafc
|
710 711 712 713 |
{ __u8 dsfield = ipv6_get_dsfield(ipv6h) & ~INET_ECN_MASK; if (t->parms.flags & IP6_TNL_F_RCV_DSCP_COPY) |
eddc9ec53
|
714 |
ipv4_change_dsfield(ip_hdr(skb), INET_ECN_MASK, dsfield); |
c4d3efafc
|
715 |
|
f4e0b4c5e
|
716 |
return IP6_ECN_decapsulate(ipv6h, skb); |
c4d3efafc
|
717 |
} |
f4e0b4c5e
|
718 719 720 |
static int ip6ip6_dscp_ecn_decapsulate(const struct ip6_tnl *t, const struct ipv6hdr *ipv6h, struct sk_buff *skb) |
1da177e4c
|
721 |
{ |
8359925be
|
722 |
if (t->parms.flags & IP6_TNL_F_RCV_DSCP_COPY) |
29bb43b4e
|
723 |
ipv6_copy_dscp(ipv6_get_dsfield(ipv6h), ipv6_hdr(skb)); |
1da177e4c
|
724 |
|
f4e0b4c5e
|
725 |
return IP6_ECN_decapsulate(ipv6h, skb); |
1da177e4c
|
726 |
} |
8359925be
|
727 |
|
f200e98d9
|
728 729 730 731 732 733 734 |
static inline int mplsip6_dscp_ecn_decapsulate(const struct ip6_tnl *t, const struct ipv6hdr *ipv6h, struct sk_buff *skb) { /* ECN is not supported in AF_MPLS */ return 0; } |
c12b395a4
|
735 |
__u32 ip6_tnl_get_cap(struct ip6_tnl *t, |
d0087b29f
|
736 737 738 |
const struct in6_addr *laddr, const struct in6_addr *raddr) { |
c12b395a4
|
739 |
struct __ip6_tnl_parm *p = &t->parms; |
d0087b29f
|
740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 |
int ltype = ipv6_addr_type(laddr); int rtype = ipv6_addr_type(raddr); __u32 flags = 0; if (ltype == IPV6_ADDR_ANY || rtype == IPV6_ADDR_ANY) { flags = IP6_TNL_F_CAP_PER_PACKET; } else if (ltype & (IPV6_ADDR_UNICAST|IPV6_ADDR_MULTICAST) && rtype & (IPV6_ADDR_UNICAST|IPV6_ADDR_MULTICAST) && !((ltype|rtype) & IPV6_ADDR_LOOPBACK) && (!((ltype|rtype) & IPV6_ADDR_LINKLOCAL) || p->link)) { if (ltype&IPV6_ADDR_UNICAST) flags |= IP6_TNL_F_CAP_XMIT; if (rtype&IPV6_ADDR_UNICAST) flags |= IP6_TNL_F_CAP_RCV; } return flags; } |
c12b395a4
|
757 |
EXPORT_SYMBOL(ip6_tnl_get_cap); |
d0087b29f
|
758 |
|
f1a28eab2
|
759 |
/* called with rcu_read_lock() */ |
c12b395a4
|
760 |
int ip6_tnl_rcv_ctl(struct ip6_tnl *t, |
d0087b29f
|
761 762 |
const struct in6_addr *laddr, const struct in6_addr *raddr) |
09c6bbf09
|
763 |
{ |
c12b395a4
|
764 |
struct __ip6_tnl_parm *p = &t->parms; |
09c6bbf09
|
765 |
int ret = 0; |
0bd876282
|
766 |
struct net *net = t->net; |
09c6bbf09
|
767 |
|
d0087b29f
|
768 769 770 |
if ((p->flags & IP6_TNL_F_CAP_RCV) || ((p->flags & IP6_TNL_F_CAP_PER_PACKET) && (ip6_tnl_get_cap(t, laddr, raddr) & IP6_TNL_F_CAP_RCV))) { |
1ab1457c4
|
771 |
struct net_device *ldev = NULL; |
09c6bbf09
|
772 773 |
if (p->link) |
f1a28eab2
|
774 |
ldev = dev_get_by_index_rcu(net, p->link); |
09c6bbf09
|
775 |
|
d0087b29f
|
776 |
if ((ipv6_addr_is_multicast(laddr) || |
232378e8d
|
777 778 |
likely(ipv6_chk_addr_and_flags(net, laddr, ldev, false, 0, IFA_F_TENTATIVE))) && |
908d140a8
|
779 |
((p->flags & IP6_TNL_F_ALLOW_LOCAL_REMOTE) || |
232378e8d
|
780 781 |
likely(!ipv6_chk_addr_and_flags(net, raddr, ldev, true, 0, IFA_F_TENTATIVE)))) |
09c6bbf09
|
782 |
ret = 1; |
09c6bbf09
|
783 784 785 |
} return ret; } |
c12b395a4
|
786 |
EXPORT_SYMBOL_GPL(ip6_tnl_rcv_ctl); |
1da177e4c
|
787 |
|
0d3c703a9
|
788 789 790 791 792 793 794 |
static int __ip6_tnl_rcv(struct ip6_tnl *tunnel, struct sk_buff *skb, const struct tnl_ptk_info *tpi, struct metadata_dst *tun_dst, int (*dscp_ecn_decapsulate)(const struct ip6_tnl *t, const struct ipv6hdr *ipv6h, struct sk_buff *skb), bool log_ecn_err) |
1da177e4c
|
795 |
{ |
0d3c703a9
|
796 |
struct pcpu_sw_netstats *tstats; |
b71d1d426
|
797 |
const struct ipv6hdr *ipv6h = ipv6_hdr(skb); |
f4e0b4c5e
|
798 |
int err; |
1da177e4c
|
799 |
|
0d3c703a9
|
800 801 802 803 804 805 806 807 |
if ((!(tpi->flags & TUNNEL_CSUM) && (tunnel->parms.i_flags & TUNNEL_CSUM)) || ((tpi->flags & TUNNEL_CSUM) && !(tunnel->parms.i_flags & TUNNEL_CSUM))) { tunnel->dev->stats.rx_crc_errors++; tunnel->dev->stats.rx_errors++; goto drop; } |
8560f2266
|
808 |
|
0d3c703a9
|
809 810 811 812 813 814 815 |
if (tunnel->parms.i_flags & TUNNEL_SEQ) { if (!(tpi->flags & TUNNEL_SEQ) || (tunnel->i_seqno && (s32)(ntohl(tpi->seq) - tunnel->i_seqno) < 0)) { tunnel->dev->stats.rx_fifo_errors++; tunnel->dev->stats.rx_errors++; goto drop; |
502b09356
|
816 |
} |
0d3c703a9
|
817 818 |
tunnel->i_seqno = ntohl(tpi->seq) + 1; } |
502b09356
|
819 |
|
0d3c703a9
|
820 |
skb->protocol = tpi->proto; |
1da177e4c
|
821 |
|
0d3c703a9
|
822 823 824 825 826 827 |
/* Warning: All skb pointers will be invalidated! */ if (tunnel->dev->type == ARPHRD_ETHER) { if (!pskb_may_pull(skb, ETH_HLEN)) { tunnel->dev->stats.rx_length_errors++; tunnel->dev->stats.rx_errors++; goto drop; |
1da177e4c
|
828 |
} |
0d3c703a9
|
829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 |
ipv6h = ipv6_hdr(skb); skb->protocol = eth_type_trans(skb, tunnel->dev); skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); } else { skb->dev = tunnel->dev; } skb_reset_network_header(skb); memset(skb->cb, 0, sizeof(struct inet6_skb_parm)); __skb_tunnel_rx(skb, tunnel->dev, tunnel->net); err = dscp_ecn_decapsulate(tunnel, ipv6h, skb); if (unlikely(err)) { if (log_ecn_err) net_info_ratelimited("non-ECT from %pI6 with DS=%#x ", &ipv6h->saddr, ipv6_get_dsfield(ipv6h)); if (err > 1) { ++tunnel->dev->stats.rx_frame_errors; ++tunnel->dev->stats.rx_errors; goto drop; |
f4e0b4c5e
|
853 |
} |
0d3c703a9
|
854 |
} |
f4e0b4c5e
|
855 |
|
0d3c703a9
|
856 857 858 859 860 |
tstats = this_cpu_ptr(tunnel->dev->tstats); u64_stats_update_begin(&tstats->syncp); tstats->rx_packets++; tstats->rx_bytes += skb->len; u64_stats_update_end(&tstats->syncp); |
8560f2266
|
861 |
|
0d3c703a9
|
862 |
skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(tunnel->dev))); |
8990f468a
|
863 |
|
8d79266bc
|
864 865 |
if (tun_dst) skb_dst_set(skb, (struct dst_entry *)tun_dst); |
0d3c703a9
|
866 867 868 869 |
gro_cells_receive(&tunnel->gro_cells, skb); return 0; drop: |
f1925ca50
|
870 871 |
if (tun_dst) dst_release((struct dst_entry *)tun_dst); |
0d3c703a9
|
872 873 874 875 876 877 878 879 880 |
kfree_skb(skb); return 0; } int ip6_tnl_rcv(struct ip6_tnl *t, struct sk_buff *skb, const struct tnl_ptk_info *tpi, struct metadata_dst *tun_dst, bool log_ecn_err) { |
272502fcb
|
881 882 883 884 885 886 887 888 889 |
int (*dscp_ecn_decapsulate)(const struct ip6_tnl *t, const struct ipv6hdr *ipv6h, struct sk_buff *skb); dscp_ecn_decapsulate = ip6ip6_dscp_ecn_decapsulate; if (tpi->proto == htons(ETH_P_IP)) dscp_ecn_decapsulate = ip4ip6_dscp_ecn_decapsulate; return __ip6_tnl_rcv(t, skb, tpi, tun_dst, dscp_ecn_decapsulate, |
0d3c703a9
|
890 891 892 893 894 895 896 897 898 899 900 901 902 |
log_ecn_err); } EXPORT_SYMBOL(ip6_tnl_rcv); static const struct tnl_ptk_info tpi_v6 = { /* no tunnel info required for ipxip6. */ .proto = htons(ETH_P_IPV6), }; static const struct tnl_ptk_info tpi_v4 = { /* no tunnel info required for ipxip6. */ .proto = htons(ETH_P_IP), }; |
f200e98d9
|
903 904 905 906 |
static const struct tnl_ptk_info tpi_mpls = { /* no tunnel info required for mplsip6. */ .proto = htons(ETH_P_MPLS_UC), }; |
0d3c703a9
|
907 908 909 910 911 912 913 914 |
static int ipxip6_rcv(struct sk_buff *skb, u8 ipproto, const struct tnl_ptk_info *tpi, int (*dscp_ecn_decapsulate)(const struct ip6_tnl *t, const struct ipv6hdr *ipv6h, struct sk_buff *skb)) { struct ip6_tnl *t; const struct ipv6hdr *ipv6h = ipv6_hdr(skb); |
8d79266bc
|
915 |
struct metadata_dst *tun_dst = NULL; |
0d3c703a9
|
916 917 918 |
int ret = -1; rcu_read_lock(); |
5fdcce211
|
919 |
t = ip6_tnl_lookup(dev_net(skb->dev), skb->dev->ifindex, &ipv6h->saddr, &ipv6h->daddr); |
0d3c703a9
|
920 921 |
if (t) { |
6aa7de059
|
922 |
u8 tproto = READ_ONCE(t->parms.proto); |
0d3c703a9
|
923 924 925 926 927 |
if (tproto != ipproto && tproto != 0) goto drop; if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) goto drop; |
cbb49697d
|
928 |
ipv6h = ipv6_hdr(skb); |
0d3c703a9
|
929 930 931 932 |
if (!ip6_tnl_rcv_ctl(t, &ipv6h->daddr, &ipv6h->saddr)) goto drop; if (iptunnel_pull_header(skb, 0, tpi->proto, false)) goto drop; |
8d79266bc
|
933 934 935 |
if (t->parms.collect_md) { tun_dst = ipv6_tun_rx_dst(skb, 0, 0, 0); if (!tun_dst) |
74c4b656c
|
936 |
goto drop; |
8d79266bc
|
937 938 |
} ret = __ip6_tnl_rcv(t, skb, tpi, tun_dst, dscp_ecn_decapsulate, |
0d3c703a9
|
939 |
log_ecn_error); |
1da177e4c
|
940 |
} |
0d3c703a9
|
941 |
|
2922bc8ae
|
942 |
rcu_read_unlock(); |
50fba2aa7
|
943 |
|
0d3c703a9
|
944 945 946 947 |
return ret; drop: rcu_read_unlock(); |
50fba2aa7
|
948 949 |
kfree_skb(skb); return 0; |
1da177e4c
|
950 |
} |
c4d3efafc
|
951 952 |
static int ip4ip6_rcv(struct sk_buff *skb) { |
ca4aa976f
|
953 |
return ipxip6_rcv(skb, IPPROTO_IPIP, &tpi_v4, |
0d3c703a9
|
954 |
ip4ip6_dscp_ecn_decapsulate); |
c4d3efafc
|
955 |
} |
8359925be
|
956 957 |
static int ip6ip6_rcv(struct sk_buff *skb) { |
0d3c703a9
|
958 959 |
return ipxip6_rcv(skb, IPPROTO_IPV6, &tpi_v6, ip6ip6_dscp_ecn_decapsulate); |
8359925be
|
960 |
} |
f200e98d9
|
961 962 963 964 965 |
static int mplsip6_rcv(struct sk_buff *skb) { return ipxip6_rcv(skb, IPPROTO_MPLS, &tpi_mpls, mplsip6_dscp_ecn_decapsulate); } |
6fb32ddeb
|
966 967 968 969 |
struct ipv6_tel_txoption { struct ipv6_txoptions ops; __u8 dst_opt[8]; }; |
1da177e4c
|
970 |
|
6fb32ddeb
|
971 972 973 |
static void init_tel_txopt(struct ipv6_tel_txoption *opt, __u8 encap_limit) { memset(opt, 0, sizeof(struct ipv6_tel_txoption)); |
1da177e4c
|
974 |
|
6fb32ddeb
|
975 976 977 978 979 |
opt->dst_opt[2] = IPV6_TLV_TNL_ENCAP_LIMIT; opt->dst_opt[3] = 1; opt->dst_opt[4] = encap_limit; opt->dst_opt[5] = IPV6_TLV_PADN; opt->dst_opt[6] = 1; |
1da177e4c
|
980 |
|
89a23c8b5
|
981 |
opt->ops.dst1opt = (struct ipv6_opt_hdr *) opt->dst_opt; |
6fb32ddeb
|
982 |
opt->ops.opt_nflen = 8; |
1da177e4c
|
983 984 985 |
} /** |
3144581cb
|
986 |
* ip6_tnl_addr_conflict - compare packet addresses to tunnel's own |
1da177e4c
|
987 |
* @t: the outgoing tunnel device |
1ab1457c4
|
988 |
* @hdr: IPv6 header from the incoming packet |
1da177e4c
|
989 990 |
* * Description: |
1ab1457c4
|
991 |
* Avoid trivial tunneling loop by checking that tunnel exit-point |
1da177e4c
|
992 993 |
* doesn't match source of incoming packet. * |
1ab1457c4
|
994 |
* Return: |
1da177e4c
|
995 996 997 |
* 1 if conflict, * 0 else **/ |
92113bfde
|
998 |
static inline bool |
b71d1d426
|
999 |
ip6_tnl_addr_conflict(const struct ip6_tnl *t, const struct ipv6hdr *hdr) |
1da177e4c
|
1000 1001 1002 |
{ return ipv6_addr_equal(&t->parms.raddr, &hdr->saddr); } |
d50051407
|
1003 1004 1005 |
int ip6_tnl_xmit_ctl(struct ip6_tnl *t, const struct in6_addr *laddr, const struct in6_addr *raddr) |
09c6bbf09
|
1006 |
{ |
c12b395a4
|
1007 |
struct __ip6_tnl_parm *p = &t->parms; |
09c6bbf09
|
1008 |
int ret = 0; |
0bd876282
|
1009 |
struct net *net = t->net; |
09c6bbf09
|
1010 |
|
6712abc16
|
1011 1012 |
if (t->parms.collect_md) return 1; |
d50051407
|
1013 1014 1015 |
if ((p->flags & IP6_TNL_F_CAP_XMIT) || ((p->flags & IP6_TNL_F_CAP_PER_PACKET) && (ip6_tnl_get_cap(t, laddr, raddr) & IP6_TNL_F_CAP_XMIT))) { |
09c6bbf09
|
1016 |
struct net_device *ldev = NULL; |
f1a28eab2
|
1017 |
rcu_read_lock(); |
09c6bbf09
|
1018 |
if (p->link) |
f1a28eab2
|
1019 |
ldev = dev_get_by_index_rcu(net, p->link); |
09c6bbf09
|
1020 |
|
232378e8d
|
1021 1022 |
if (unlikely(!ipv6_chk_addr_and_flags(net, laddr, ldev, false, 0, IFA_F_TENTATIVE))) |
f32138319
|
1023 1024 1025 |
pr_warn("%s xmit: Local address not yet configured! ", p->name); |
908d140a8
|
1026 1027 |
else if (!(p->flags & IP6_TNL_F_ALLOW_LOCAL_REMOTE) && !ipv6_addr_is_multicast(raddr) && |
232378e8d
|
1028 1029 |
unlikely(ipv6_chk_addr_and_flags(net, raddr, ldev, true, 0, IFA_F_TENTATIVE))) |
f32138319
|
1030 1031 1032 |
pr_warn("%s xmit: Routing loop! Remote address found on this node! ", p->name); |
09c6bbf09
|
1033 1034 |
else ret = 1; |
f1a28eab2
|
1035 |
rcu_read_unlock(); |
09c6bbf09
|
1036 1037 1038 |
} return ret; } |
c12b395a4
|
1039 |
EXPORT_SYMBOL_GPL(ip6_tnl_xmit_ctl); |
1da177e4c
|
1040 |
/** |
8eb30be03
|
1041 |
* ip6_tnl_xmit - encapsulate packet and send |
1da177e4c
|
1042 |
* @skb: the outgoing socket buffer |
1ab1457c4
|
1043 |
* @dev: the outgoing tunnel device |
61ec2aec2
|
1044 |
* @dsfield: dscp code for outer header |
8eb30be03
|
1045 |
* @fl6: flow of tunneled packet |
61ec2aec2
|
1046 1047 |
* @encap_limit: encapsulation limit * @pmtu: Path MTU is stored if packet is too big |
8eb30be03
|
1048 |
* @proto: next header value |
1da177e4c
|
1049 1050 1051 1052 1053 |
* * Description: * Build new header and do some sanity checks on the packet before sending * it. * |
1ab1457c4
|
1054 |
* Return: |
c4d3efafc
|
1055 |
* 0 on success |
61ec2aec2
|
1056 1057 |
* -1 fail * %-EMSGSIZE message too big. return mtu in this case. |
1da177e4c
|
1058 |
**/ |
8eb30be03
|
1059 1060 1061 |
int ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev, __u8 dsfield, struct flowi6 *fl6, int encap_limit, __u32 *pmtu, __u8 proto) |
1da177e4c
|
1062 |
{ |
2941a4863
|
1063 |
struct ip6_tnl *t = netdev_priv(dev); |
0bd876282
|
1064 |
struct net *net = t->net; |
3dca02af3
|
1065 |
struct net_device_stats *stats = &t->dev->stats; |
199ab00f3
|
1066 |
struct ipv6hdr *ipv6h; |
6fb32ddeb
|
1067 |
struct ipv6_tel_txoption opt; |
d24f22f3d
|
1068 |
struct dst_entry *dst = NULL, *ndst = NULL; |
1da177e4c
|
1069 1070 |
struct net_device *tdev; int mtu; |
d41bb33ba
|
1071 |
unsigned int eth_hlen = t->dev->type == ARPHRD_ETHER ? ETH_HLEN : 0; |
058214a4d
|
1072 1073 |
unsigned int psh_hlen = sizeof(struct ipv6hdr) + t->encap_hlen; unsigned int max_headroom = psh_hlen; |
b5c2d4954
|
1074 |
bool use_cache = false; |
8d79266bc
|
1075 |
u8 hop_limit; |
61ec2aec2
|
1076 |
int err = -1; |
1da177e4c
|
1077 |
|
8d79266bc
|
1078 1079 1080 1081 1082 1083 |
if (t->parms.collect_md) { hop_limit = skb_tunnel_info(skb)->key.ttl; goto route_lookup; } else { hop_limit = t->parms.hop_limit; } |
ea3dc9601
|
1084 1085 |
/* NBMA tunnel */ if (ipv6_addr_any(&t->parms.raddr)) { |
199ab00f3
|
1086 1087 1088 1089 |
if (skb->protocol == htons(ETH_P_IPV6)) { struct in6_addr *addr6; struct neighbour *neigh; int addr_type; |
ea3dc9601
|
1090 |
|
199ab00f3
|
1091 1092 |
if (!skb_dst(skb)) goto tx_err_link_failure; |
ea3dc9601
|
1093 |
|
199ab00f3
|
1094 1095 1096 1097 |
neigh = dst_neigh_lookup(skb_dst(skb), &ipv6_hdr(skb)->daddr); if (!neigh) goto tx_err_link_failure; |
ea3dc9601
|
1098 |
|
199ab00f3
|
1099 1100 |
addr6 = (struct in6_addr *)&neigh->primary_key; addr_type = ipv6_addr_type(addr6); |
ea3dc9601
|
1101 |
|
199ab00f3
|
1102 1103 |
if (addr_type == IPV6_ADDR_ANY) addr6 = &ipv6_hdr(skb)->daddr; |
ea3dc9601
|
1104 |
|
199ab00f3
|
1105 1106 1107 |
memcpy(&fl6->daddr, addr6, sizeof(fl6->daddr)); neigh_release(neigh); } |
23263ec86
|
1108 1109 1110 1111 1112 |
} else if (t->parms.proto != 0 && !(t->parms.flags & (IP6_TNL_F_USE_ORIG_TCLASS | IP6_TNL_F_USE_ORIG_FWMARK))) { /* enable the cache only if neither the outer protocol nor the * routing decision depends on the current inner header value |
b5c2d4954
|
1113 1114 1115 1116 1117 |
*/ use_cache = true; } if (use_cache) |
607f725f6
|
1118 |
dst = dst_cache_get(&t->dst_cache); |
d50051407
|
1119 1120 1121 |
if (!ip6_tnl_xmit_ctl(t, &fl6->saddr, &fl6->daddr)) goto tx_err_link_failure; |
89b021269
|
1122 |
if (!dst) { |
8d79266bc
|
1123 |
route_lookup: |
5f733ee68
|
1124 1125 |
/* add dsfield to flowlabel for route lookup */ fl6->flowlabel = ip6_make_flowinfo(dsfield, fl6->flowlabel); |
cdf3464e6
|
1126 |
dst = ip6_route_output(net, NULL, fl6); |
1da177e4c
|
1127 |
|
cdf3464e6
|
1128 |
if (dst->error) |
a57ebc90f
|
1129 |
goto tx_err_link_failure; |
cdf3464e6
|
1130 1131 1132 1133 |
dst = xfrm_lookup(net, dst, flowi6_to_flowi(fl6), NULL, 0); if (IS_ERR(dst)) { err = PTR_ERR(dst); dst = NULL; |
452edd598
|
1134 1135 |
goto tx_err_link_failure; } |
3789cabaa
|
1136 |
if (t->parms.collect_md && ipv6_addr_any(&fl6->saddr) && |
8d79266bc
|
1137 1138 1139 |
ipv6_dev_get_saddr(net, ip6_dst_idev(dst)->dev, &fl6->daddr, 0, &fl6->saddr)) goto tx_err_link_failure; |
cdf3464e6
|
1140 |
ndst = dst; |
a57ebc90f
|
1141 |
} |
1da177e4c
|
1142 1143 1144 1145 1146 |
tdev = dst->dev; if (tdev == dev) { stats->collisions++; |
e87cc4728
|
1147 1148 1149 |
net_warn_ratelimited("%s: Local routing loop detected! ", t->parms.name); |
1da177e4c
|
1150 1151 |
goto tx_err_dst_release; } |
d41bb33ba
|
1152 |
mtu = dst_mtu(dst) - eth_hlen - psh_hlen - t->tun_hlen; |
6fb32ddeb
|
1153 |
if (encap_limit >= 0) { |
1da177e4c
|
1154 1155 1156 |
max_headroom += 8; mtu -= 8; } |
82a40777d
|
1157 1158 |
mtu = max(mtu, skb->protocol == htons(ETH_P_IPV6) ? IPV6_MIN_MTU : IPV4_MIN_MTU); |
c9fefa081
|
1159 |
|
7a1592bcb
|
1160 |
skb_dst_update_pmtu_no_confirm(skb, mtu); |
d41bb33ba
|
1161 |
if (skb->len - t->tun_hlen - eth_hlen > mtu && !skb_is_gso(skb)) { |
61ec2aec2
|
1162 1163 |
*pmtu = mtu; err = -EMSGSIZE; |
1da177e4c
|
1164 1165 |
goto tx_err_dst_release; } |
8eb30be03
|
1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 |
if (t->err_count > 0) { if (time_before(jiffies, t->err_time + IP6TUNNEL_ERR_TIMEO)) { t->err_count--; dst_link_failure(skb); } else { t->err_count = 0; } } |
963a88b31
|
1176 |
skb_scrub_packet(skb, !net_eq(t->net, dev_net(dev))); |
0bd876282
|
1177 |
|
1da177e4c
|
1178 1179 1180 1181 |
/* * Okay, now see if we can stuff it in the buffer as-is. */ max_headroom += LL_RESERVED_SPACE(tdev); |
1ab1457c4
|
1182 |
|
cfbba49d8
|
1183 1184 |
if (skb_headroom(skb) < max_headroom || skb_shared(skb) || (skb_cloned(skb) && !skb_clone_writable(skb, 0))) { |
1da177e4c
|
1185 |
struct sk_buff *new_skb; |
1ab1457c4
|
1186 |
|
e5d08d718
|
1187 1188 |
new_skb = skb_realloc_headroom(skb, max_headroom); if (!new_skb) |
1da177e4c
|
1189 1190 1191 1192 |
goto tx_err_dst_release; if (skb->sk) skb_set_owner_w(new_skb, skb->sk); |
9ff264492
|
1193 |
consume_skb(skb); |
1da177e4c
|
1194 1195 |
skb = new_skb; } |
cdf3464e6
|
1196 |
|
8d79266bc
|
1197 1198 1199 1200 |
if (t->parms.collect_md) { if (t->encap.type != TUNNEL_ENCAP_NONE) goto tx_err_dst_release; } else { |
b5c2d4954
|
1201 |
if (use_cache && ndst) |
8d79266bc
|
1202 1203 |
dst_cache_set_ip6(&t->dst_cache, ndst, &fl6->saddr); } |
cdf3464e6
|
1204 |
skb_dst_set(skb, dst); |
36feaac35
|
1205 1206 1207 1208 1209 1210 1211 1212 |
if (hop_limit == 0) { if (skb->protocol == htons(ETH_P_IP)) hop_limit = ip_hdr(skb)->ttl; else if (skb->protocol == htons(ETH_P_IPV6)) hop_limit = ipv6_hdr(skb)->hop_limit; else hop_limit = ip6_dst_hoplimit(dst); } |
3d483058c
|
1213 |
|
058214a4d
|
1214 1215 1216 |
/* Calculate max headroom for all the headers and adjust * needed_headroom if necessary. */ |
8eb30be03
|
1217 |
max_headroom = LL_RESERVED_SPACE(dst->dev) + sizeof(struct ipv6hdr) |
058214a4d
|
1218 |
+ dst->header_len + t->hlen; |
8eb30be03
|
1219 1220 |
if (max_headroom > dev->needed_headroom) dev->needed_headroom = max_headroom; |
9e7c5b396
|
1221 |
skb_set_inner_ipproto(skb, proto); |
058214a4d
|
1222 1223 1224 |
err = ip6_tnl_encap(skb, t, &proto, fl6); if (err) return err; |
d4d576f5a
|
1225 1226 1227 1228 |
if (encap_limit >= 0) { init_tel_txopt(&opt, encap_limit); ipv6_push_frag_opts(skb, &opt.ops, &proto); } |
e2d1bca7e
|
1229 1230 |
skb_push(skb, sizeof(struct ipv6hdr)); skb_reset_network_header(skb); |
0660e03f6
|
1231 |
ipv6h = ipv6_hdr(skb); |
0e9a70956
|
1232 |
ip6_flow_hdr(ipv6h, dsfield, |
42240901f
|
1233 |
ip6_make_flowlabel(net, skb, fl6->flowlabel, true, fl6)); |
8d79266bc
|
1234 |
ipv6h->hop_limit = hop_limit; |
1da177e4c
|
1235 |
ipv6h->nexthdr = proto; |
4e3fd7a06
|
1236 1237 |
ipv6h->saddr = fl6->saddr; ipv6h->daddr = fl6->daddr; |
79b16aade
|
1238 |
ip6tunnel_xmit(NULL, skb, dev); |
1da177e4c
|
1239 1240 1241 1242 1243 |
return 0; tx_err_link_failure: stats->tx_carrier_errors++; dst_link_failure(skb); tx_err_dst_release: |
cdf3464e6
|
1244 |
dst_release(dst); |
61ec2aec2
|
1245 1246 |
return err; } |
8eb30be03
|
1247 |
EXPORT_SYMBOL(ip6_tnl_xmit); |
61ec2aec2
|
1248 1249 |
static inline int |
e7bb18e6c
|
1250 1251 |
ipxip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev, u8 protocol) |
c4d3efafc
|
1252 1253 |
{ struct ip6_tnl *t = netdev_priv(dev); |
e7bb18e6c
|
1254 |
struct ipv6hdr *ipv6h; |
76c0ddd8c
|
1255 |
const struct iphdr *iph; |
c4d3efafc
|
1256 |
int encap_limit = -1; |
e7bb18e6c
|
1257 |
__u16 offset; |
4c9483b2f
|
1258 |
struct flowi6 fl6; |
e7bb18e6c
|
1259 |
__u8 dsfield, orig_dsfield; |
c4d3efafc
|
1260 |
__u32 mtu; |
acf722f73
|
1261 |
u8 tproto; |
c4d3efafc
|
1262 |
int err; |
6aa7de059
|
1263 |
tproto = READ_ONCE(t->parms.proto); |
e7bb18e6c
|
1264 |
if (tproto != protocol && tproto != 0) |
c4d3efafc
|
1265 |
return -1; |
8d79266bc
|
1266 1267 1268 |
if (t->parms.collect_md) { struct ip_tunnel_info *tun_info; const struct ip_tunnel_key *key; |
c4d3efafc
|
1269 |
|
8d79266bc
|
1270 1271 1272 1273 1274 1275 |
tun_info = skb_tunnel_info(skb); if (unlikely(!tun_info || !(tun_info->mode & IP_TUNNEL_INFO_TX) || ip_tunnel_info_af(tun_info) != AF_INET6)) return -1; key = &tun_info->key; memset(&fl6, 0, sizeof(fl6)); |
e7bb18e6c
|
1276 |
fl6.flowi6_proto = protocol; |
3789cabaa
|
1277 |
fl6.saddr = key->u.ipv6.src; |
8d79266bc
|
1278 1279 |
fl6.daddr = key->u.ipv6.dst; fl6.flowlabel = key->label; |
46f8cd9d2
|
1280 |
dsfield = key->tos; |
e7bb18e6c
|
1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 |
switch (protocol) { case IPPROTO_IPIP: iph = ip_hdr(skb); orig_dsfield = ipv4_get_dsfield(iph); break; case IPPROTO_IPV6: ipv6h = ipv6_hdr(skb); orig_dsfield = ipv6_get_dsfield(ipv6h); break; default: orig_dsfield = dsfield; break; } |
8d79266bc
|
1294 1295 1296 |
} else { if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) encap_limit = t->parms.encap_limit; |
e7bb18e6c
|
1297 1298 1299 1300 1301 1302 1303 1304 |
if (protocol == IPPROTO_IPV6) { offset = ip6_tnl_parse_tlv_enc_lim(skb, skb_network_header(skb)); /* ip6_tnl_parse_tlv_enc_lim() might have * reallocated skb->head */ if (offset > 0) { struct ipv6_tlv_tnl_enc_lim *tel; |
c4d3efafc
|
1305 |
|
e7bb18e6c
|
1306 1307 1308 1309 1310 1311 1312 |
tel = (void *)&skb_network_header(skb)[offset]; if (tel->encap_limit == 0) { icmpv6_send(skb, ICMPV6_PARAMPROB, ICMPV6_HDR_FIELD, offset + 2); return -1; } encap_limit = tel->encap_limit - 1; |
8d79266bc
|
1313 |
} |
61ec2aec2
|
1314 |
} |
61ec2aec2
|
1315 |
|
8d79266bc
|
1316 |
memcpy(&fl6, &t->fl.u.ip6, sizeof(fl6)); |
e7bb18e6c
|
1317 |
fl6.flowi6_proto = protocol; |
61ec2aec2
|
1318 |
|
8d79266bc
|
1319 1320 |
if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK) fl6.flowi6_mark = skb->mark; |
0a473b82c
|
1321 1322 |
else fl6.flowi6_mark = t->parms.fwmark; |
e7bb18e6c
|
1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 |
switch (protocol) { case IPPROTO_IPIP: iph = ip_hdr(skb); orig_dsfield = ipv4_get_dsfield(iph); if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS) dsfield = orig_dsfield; else dsfield = ip6_tclass(t->parms.flowinfo); break; case IPPROTO_IPV6: ipv6h = ipv6_hdr(skb); orig_dsfield = ipv6_get_dsfield(ipv6h); if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS) dsfield = orig_dsfield; else dsfield = ip6_tclass(t->parms.flowinfo); if (t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) fl6.flowlabel |= ip6_flowlabel(ipv6h); break; default: |
6c11fbf97
|
1343 |
orig_dsfield = dsfield = ip6_tclass(t->parms.flowinfo); |
e7bb18e6c
|
1344 1345 |
break; } |
8d79266bc
|
1346 |
} |
61ec2aec2
|
1347 |
|
e2d118a1c
|
1348 |
fl6.flowi6_uid = sock_net_uid(dev_net(dev), NULL); |
e7bb18e6c
|
1349 |
dsfield = INET_ECN_encapsulate(dsfield, orig_dsfield); |
e2d118a1c
|
1350 |
|
815d22e55
|
1351 1352 |
if (iptunnel_handle_offloads(skb, SKB_GSO_IPXIP6)) return -1; |
8eb30be03
|
1353 |
err = ip6_tnl_xmit(skb, dev, dsfield, &fl6, encap_limit, &mtu, |
e7bb18e6c
|
1354 |
protocol); |
61ec2aec2
|
1355 |
if (err != 0) { |
e7bb18e6c
|
1356 |
/* XXX: send ICMP error even if DF is not set. */ |
61ec2aec2
|
1357 |
if (err == -EMSGSIZE) |
e7bb18e6c
|
1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 |
switch (protocol) { case IPPROTO_IPIP: icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu)); break; case IPPROTO_IPV6: icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); break; default: break; } |
61ec2aec2
|
1369 1370 1371 1372 1373 |
return -1; } return 0; } |
6fef4c0c8
|
1374 |
static netdev_tx_t |
8eb30be03
|
1375 |
ip6_tnl_start_xmit(struct sk_buff *skb, struct net_device *dev) |
61ec2aec2
|
1376 1377 |
{ struct ip6_tnl *t = netdev_priv(dev); |
3dca02af3
|
1378 |
struct net_device_stats *stats = &t->dev->stats; |
e7bb18e6c
|
1379 |
u8 ipproto; |
61ec2aec2
|
1380 |
int ret; |
cb9f1b783
|
1381 1382 |
if (!pskb_inet_may_pull(skb)) goto tx_err; |
61ec2aec2
|
1383 |
switch (skb->protocol) { |
606780404
|
1384 |
case htons(ETH_P_IP): |
e7bb18e6c
|
1385 |
ipproto = IPPROTO_IPIP; |
c4d3efafc
|
1386 |
break; |
606780404
|
1387 |
case htons(ETH_P_IPV6): |
e7bb18e6c
|
1388 1389 1390 |
if (ip6_tnl_addr_conflict(t, ipv6_hdr(skb))) goto tx_err; ipproto = IPPROTO_IPV6; |
61ec2aec2
|
1391 |
break; |
6c11fbf97
|
1392 1393 1394 |
case htons(ETH_P_MPLS_UC): ipproto = IPPROTO_MPLS; break; |
61ec2aec2
|
1395 1396 1397 |
default: goto tx_err; } |
e7bb18e6c
|
1398 |
ret = ipxip6_tnl_xmit(skb, dev, ipproto); |
61ec2aec2
|
1399 1400 |
if (ret < 0) goto tx_err; |
6ed106549
|
1401 |
return NETDEV_TX_OK; |
61ec2aec2
|
1402 |
|
1da177e4c
|
1403 1404 1405 1406 |
tx_err: stats->tx_errors++; stats->tx_dropped++; kfree_skb(skb); |
6ed106549
|
1407 |
return NETDEV_TX_OK; |
1da177e4c
|
1408 |
} |
3144581cb
|
1409 |
static void ip6_tnl_link_config(struct ip6_tnl *t) |
1da177e4c
|
1410 1411 |
{ struct net_device *dev = t->dev; |
5fdcce211
|
1412 |
struct net_device *tdev = NULL; |
c12b395a4
|
1413 |
struct __ip6_tnl_parm *p = &t->parms; |
4c9483b2f
|
1414 |
struct flowi6 *fl6 = &t->fl.u.ip6; |
5fdcce211
|
1415 |
unsigned int mtu; |
058214a4d
|
1416 |
int t_hlen; |
1da177e4c
|
1417 |
|
3a6d54c56
|
1418 1419 |
memcpy(dev->dev_addr, &p->laddr, sizeof(struct in6_addr)); memcpy(dev->broadcast, &p->raddr, sizeof(struct in6_addr)); |
1da177e4c
|
1420 1421 |
/* Set up flowi template */ |
4e3fd7a06
|
1422 1423 |
fl6->saddr = p->laddr; fl6->daddr = p->raddr; |
4c9483b2f
|
1424 1425 |
fl6->flowi6_oif = p->link; fl6->flowlabel = 0; |
1da177e4c
|
1426 1427 |
if (!(p->flags&IP6_TNL_F_USE_ORIG_TCLASS)) |
4c9483b2f
|
1428 |
fl6->flowlabel |= IPV6_TCLASS_MASK & p->flowinfo; |
1da177e4c
|
1429 |
if (!(p->flags&IP6_TNL_F_USE_ORIG_FLOWLABEL)) |
4c9483b2f
|
1430 |
fl6->flowlabel |= IPV6_FLOWLABEL_MASK & p->flowinfo; |
1da177e4c
|
1431 |
|
d0087b29f
|
1432 1433 |
p->flags &= ~(IP6_TNL_F_CAP_XMIT|IP6_TNL_F_CAP_RCV|IP6_TNL_F_CAP_PER_PACKET); p->flags |= ip6_tnl_get_cap(t, &p->laddr, &p->raddr); |
1da177e4c
|
1434 1435 1436 1437 1438 |
if (p->flags&IP6_TNL_F_CAP_XMIT && p->flags&IP6_TNL_F_CAP_RCV) dev->flags |= IFF_POINTOPOINT; else dev->flags &= ~IFF_POINTOPOINT; |
058214a4d
|
1439 1440 1441 |
t->tun_hlen = 0; t->hlen = t->encap_hlen + t->tun_hlen; t_hlen = t->hlen + sizeof(struct ipv6hdr); |
1da177e4c
|
1442 |
if (p->flags & IP6_TNL_F_CAP_XMIT) { |
305d4b3ce
|
1443 1444 |
int strict = (ipv6_addr_type(&p->raddr) & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)); |
0bd876282
|
1445 |
struct rt6_info *rt = rt6_lookup(t->net, |
2f7f54b72
|
1446 |
&p->raddr, &p->laddr, |
b75cc8f90
|
1447 |
p->link, NULL, strict); |
5fdcce211
|
1448 1449 1450 1451 |
if (rt) { tdev = rt->dst.dev; ip6_rt_put(rt); } |
1da177e4c
|
1452 |
|
5fdcce211
|
1453 1454 |
if (!tdev && p->link) tdev = __dev_get_by_index(t->net, p->link); |
1da177e4c
|
1455 |
|
5fdcce211
|
1456 1457 1458 |
if (tdev) { dev->hard_header_len = tdev->hard_header_len + t_hlen; mtu = min_t(unsigned int, tdev->mtu, IP6_MAX_MTU); |
1da177e4c
|
1459 |
|
5fdcce211
|
1460 |
dev->mtu = mtu - t_hlen; |
381601e5b
|
1461 |
if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) |
67ba4152e
|
1462 |
dev->mtu -= 8; |
1da177e4c
|
1463 1464 1465 1466 |
if (dev->mtu < IPV6_MIN_MTU) dev->mtu = IPV6_MIN_MTU; } |
1da177e4c
|
1467 1468 1469 1470 |
} } /** |
3144581cb
|
1471 |
* ip6_tnl_change - update the tunnel parameters |
1da177e4c
|
1472 1473 |
* @t: tunnel to be changed * @p: tunnel configuration parameters |
1da177e4c
|
1474 1475 |
* * Description: |
3144581cb
|
1476 |
* ip6_tnl_change() updates the tunnel parameters |
1da177e4c
|
1477 1478 1479 |
**/ static int |
c12b395a4
|
1480 |
ip6_tnl_change(struct ip6_tnl *t, const struct __ip6_tnl_parm *p) |
1da177e4c
|
1481 |
{ |
4e3fd7a06
|
1482 1483 |
t->parms.laddr = p->laddr; t->parms.raddr = p->raddr; |
1da177e4c
|
1484 1485 1486 1487 |
t->parms.flags = p->flags; t->parms.hop_limit = p->hop_limit; t->parms.encap_limit = p->encap_limit; t->parms.flowinfo = p->flowinfo; |
8181b8c1f
|
1488 |
t->parms.link = p->link; |
502b09356
|
1489 |
t->parms.proto = p->proto; |
0a473b82c
|
1490 |
t->parms.fwmark = p->fwmark; |
607f725f6
|
1491 |
dst_cache_reset(&t->dst_cache); |
3144581cb
|
1492 |
ip6_tnl_link_config(t); |
1da177e4c
|
1493 1494 |
return 0; } |
0b1124572
|
1495 1496 |
static int ip6_tnl_update(struct ip6_tnl *t, struct __ip6_tnl_parm *p) { |
0bd876282
|
1497 |
struct net *net = t->net; |
0b1124572
|
1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 |
struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); int err; ip6_tnl_unlink(ip6n, t); synchronize_net(); err = ip6_tnl_change(t, p); ip6_tnl_link(ip6n, t); netdev_state_change(t->dev); return err; } |
acf722f73
|
1508 1509 1510 1511 1512 1513 1514 |
static int ip6_tnl0_update(struct ip6_tnl *t, struct __ip6_tnl_parm *p) { /* for default tnl0 device allow to change only the proto */ t->parms.proto = p->proto; netdev_state_change(t->dev); return 0; } |
c12b395a4
|
1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 |
static void ip6_tnl_parm_from_user(struct __ip6_tnl_parm *p, const struct ip6_tnl_parm *u) { p->laddr = u->laddr; p->raddr = u->raddr; p->flags = u->flags; p->hop_limit = u->hop_limit; p->encap_limit = u->encap_limit; p->flowinfo = u->flowinfo; p->link = u->link; p->proto = u->proto; memcpy(p->name, u->name, sizeof(u->name)); } static void ip6_tnl_parm_to_user(struct ip6_tnl_parm *u, const struct __ip6_tnl_parm *p) { u->laddr = p->laddr; u->raddr = p->raddr; u->flags = p->flags; u->hop_limit = p->hop_limit; u->encap_limit = p->encap_limit; u->flowinfo = p->flowinfo; u->link = p->link; u->proto = p->proto; memcpy(u->name, p->name, sizeof(u->name)); } |
1da177e4c
|
1542 |
/** |
3144581cb
|
1543 |
* ip6_tnl_ioctl - configure ipv6 tunnels from userspace |
1da177e4c
|
1544 1545 1546 1547 1548 |
* @dev: virtual device associated with tunnel * @ifr: parameters passed from userspace * @cmd: command to be performed * * Description: |
3144581cb
|
1549 |
* ip6_tnl_ioctl() is used for managing IPv6 tunnels |
1ab1457c4
|
1550 |
* from userspace. |
1da177e4c
|
1551 1552 1553 1554 1555 1556 1557 |
* * The possible commands are the following: * %SIOCGETTUNNEL: get tunnel parameters for device * %SIOCADDTUNNEL: add tunnel matching given tunnel parameters * %SIOCCHGTUNNEL: change tunnel parameters to those given * %SIOCDELTUNNEL: delete tunnel * |
1ab1457c4
|
1558 |
* The fallback device "ip6tnl0", created during module |
1da177e4c
|
1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 |
* initialization, can be used for creating other tunnel devices. * * Return: * 0 on success, * %-EFAULT if unable to copy data to or from userspace, * %-EPERM if current process hasn't %CAP_NET_ADMIN set * %-EINVAL if passed tunnel parameters are invalid, * %-EEXIST if changing a tunnel's parameters would cause a conflict * %-ENODEV if attempting to change or delete a nonexisting device **/ static int |
3144581cb
|
1571 |
ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4c
|
1572 1573 |
{ int err = 0; |
1da177e4c
|
1574 |
struct ip6_tnl_parm p; |
c12b395a4
|
1575 |
struct __ip6_tnl_parm p1; |
74462f0d4
|
1576 1577 |
struct ip6_tnl *t = netdev_priv(dev); struct net *net = t->net; |
2dd02c897
|
1578 |
struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
1da177e4c
|
1579 |
|
0d3c703a9
|
1580 |
memset(&p1, 0, sizeof(p1)); |
1da177e4c
|
1581 1582 |
switch (cmd) { case SIOCGETTUNNEL: |
15820e129
|
1583 |
if (dev == ip6n->fb_tnl_dev) { |
67ba4152e
|
1584 |
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) { |
1da177e4c
|
1585 1586 1587 |
err = -EFAULT; break; } |
c12b395a4
|
1588 1589 |
ip6_tnl_parm_from_user(&p1, &p); t = ip6_tnl_locate(net, &p1, 0); |
37355565b
|
1590 |
if (IS_ERR(t)) |
74462f0d4
|
1591 |
t = netdev_priv(dev); |
5ef5d6c56
|
1592 1593 |
} else { memset(&p, 0, sizeof(p)); |
567131a72
|
1594 |
} |
c12b395a4
|
1595 |
ip6_tnl_parm_to_user(&p, &t->parms); |
67ba4152e
|
1596 |
if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) { |
1da177e4c
|
1597 1598 1599 1600 1601 1602 |
err = -EFAULT; } break; case SIOCADDTUNNEL: case SIOCCHGTUNNEL: err = -EPERM; |
af31f412c
|
1603 |
if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4c
|
1604 |
break; |
567131a72
|
1605 |
err = -EFAULT; |
67ba4152e
|
1606 |
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) |
1da177e4c
|
1607 |
break; |
567131a72
|
1608 |
err = -EINVAL; |
502b09356
|
1609 1610 |
if (p.proto != IPPROTO_IPV6 && p.proto != IPPROTO_IPIP && p.proto != 0) |
1da177e4c
|
1611 |
break; |
c12b395a4
|
1612 1613 |
ip6_tnl_parm_from_user(&p1, &p); t = ip6_tnl_locate(net, &p1, cmd == SIOCADDTUNNEL); |
acf722f73
|
1614 |
if (cmd == SIOCCHGTUNNEL) { |
37355565b
|
1615 |
if (!IS_ERR(t)) { |
567131a72
|
1616 1617 1618 1619 1620 1621 |
if (t->dev != dev) { err = -EEXIST; break; } } else t = netdev_priv(dev); |
acf722f73
|
1622 1623 1624 1625 |
if (dev == ip6n->fb_tnl_dev) err = ip6_tnl0_update(t, &p1); else err = ip6_tnl_update(t, &p1); |
1da177e4c
|
1626 |
} |
37355565b
|
1627 |
if (!IS_ERR(t)) { |
1da177e4c
|
1628 |
err = 0; |
c12b395a4
|
1629 1630 |
ip6_tnl_parm_to_user(&p, &t->parms); if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) |
567131a72
|
1631 |
err = -EFAULT; |
37355565b
|
1632 1633 1634 |
} else { err = PTR_ERR(t); } |
1da177e4c
|
1635 1636 1637 |
break; case SIOCDELTUNNEL: err = -EPERM; |
af31f412c
|
1638 |
if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4c
|
1639 |
break; |
15820e129
|
1640 |
if (dev == ip6n->fb_tnl_dev) { |
567131a72
|
1641 |
err = -EFAULT; |
67ba4152e
|
1642 |
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) |
1da177e4c
|
1643 |
break; |
567131a72
|
1644 |
err = -ENOENT; |
c12b395a4
|
1645 1646 |
ip6_tnl_parm_from_user(&p1, &p); t = ip6_tnl_locate(net, &p1, 0); |
37355565b
|
1647 |
if (IS_ERR(t)) |
1da177e4c
|
1648 |
break; |
567131a72
|
1649 |
err = -EPERM; |
15820e129
|
1650 |
if (t->dev == ip6n->fb_tnl_dev) |
1da177e4c
|
1651 |
break; |
567131a72
|
1652 |
dev = t->dev; |
1da177e4c
|
1653 |
} |
22f8cde5b
|
1654 1655 |
err = 0; unregister_netdevice(dev); |
1da177e4c
|
1656 1657 1658 1659 1660 1661 1662 1663 |
break; default: err = -EINVAL; } return err; } /** |
3144581cb
|
1664 |
* ip6_tnl_change_mtu - change mtu manually for tunnel device |
1da177e4c
|
1665 1666 1667 1668 1669 1670 1671 |
* @dev: virtual device associated with tunnel * @new_mtu: the new mtu * * Return: * 0 on success, * %-EINVAL if mtu too small **/ |
79ecb90e6
|
1672 |
int ip6_tnl_change_mtu(struct net_device *dev, int new_mtu) |
1da177e4c
|
1673 |
{ |
582442d6d
|
1674 |
struct ip6_tnl *tnl = netdev_priv(dev); |
2fa771be9
|
1675 1676 |
if (tnl->parms.proto == IPPROTO_IPV6) { if (new_mtu < IPV6_MIN_MTU) |
582442d6d
|
1677 1678 |
return -EINVAL; } else { |
2fa771be9
|
1679 |
if (new_mtu < ETH_MIN_MTU) |
582442d6d
|
1680 |
return -EINVAL; |
1da177e4c
|
1681 |
} |
f7ff1fde9
|
1682 1683 1684 1685 1686 1687 1688 |
if (tnl->parms.proto == IPPROTO_IPV6 || tnl->parms.proto == 0) { if (new_mtu > IP6_MAX_MTU - dev->hard_header_len) return -EINVAL; } else { if (new_mtu > IP_MAX_MTU - dev->hard_header_len) return -EINVAL; } |
1da177e4c
|
1689 1690 1691 |
dev->mtu = new_mtu; return 0; } |
79ecb90e6
|
1692 |
EXPORT_SYMBOL(ip6_tnl_change_mtu); |
1da177e4c
|
1693 |
|
ecf2c06a8
|
1694 1695 1696 1697 1698 1699 1700 |
int ip6_tnl_get_iflink(const struct net_device *dev) { struct ip6_tnl *t = netdev_priv(dev); return t->parms.link; } EXPORT_SYMBOL(ip6_tnl_get_iflink); |
1326c3d5a
|
1701 |
|
058214a4d
|
1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 |
int ip6_tnl_encap_add_ops(const struct ip6_tnl_encap_ops *ops, unsigned int num) { if (num >= MAX_IPTUN_ENCAP_OPS) return -ERANGE; return !cmpxchg((const struct ip6_tnl_encap_ops **) &ip6tun_encaps[num], NULL, ops) ? 0 : -1; } EXPORT_SYMBOL(ip6_tnl_encap_add_ops); int ip6_tnl_encap_del_ops(const struct ip6_tnl_encap_ops *ops, unsigned int num) { int ret; if (num >= MAX_IPTUN_ENCAP_OPS) return -ERANGE; ret = (cmpxchg((const struct ip6_tnl_encap_ops **) &ip6tun_encaps[num], ops, NULL) == ops) ? 0 : -1; synchronize_net(); return ret; } EXPORT_SYMBOL(ip6_tnl_encap_del_ops); int ip6_tnl_encap_setup(struct ip6_tnl *t, struct ip_tunnel_encap *ipencap) { int hlen; memset(&t->encap, 0, sizeof(t->encap)); hlen = ip6_encap_hlen(ipencap); if (hlen < 0) return hlen; t->encap.type = ipencap->type; t->encap.sport = ipencap->sport; t->encap.dport = ipencap->dport; t->encap.flags = ipencap->flags; t->encap_hlen = hlen; t->hlen = t->encap_hlen + t->tun_hlen; return 0; } EXPORT_SYMBOL_GPL(ip6_tnl_encap_setup); |
1326c3d5a
|
1754 |
static const struct net_device_ops ip6_tnl_netdev_ops = { |
6c6151daa
|
1755 |
.ndo_init = ip6_tnl_dev_init, |
8560f2266
|
1756 |
.ndo_uninit = ip6_tnl_dev_uninit, |
8eb30be03
|
1757 |
.ndo_start_xmit = ip6_tnl_start_xmit, |
8560f2266
|
1758 |
.ndo_do_ioctl = ip6_tnl_ioctl, |
1326c3d5a
|
1759 |
.ndo_change_mtu = ip6_tnl_change_mtu, |
8560f2266
|
1760 |
.ndo_get_stats = ip6_get_stats, |
ecf2c06a8
|
1761 |
.ndo_get_iflink = ip6_tnl_get_iflink, |
1326c3d5a
|
1762 |
}; |
51c052d4f
|
1763 1764 1765 1766 1767 |
#define IPXIPX_FEATURES (NETIF_F_SG | \ NETIF_F_FRAGLIST | \ NETIF_F_HIGHDMA | \ NETIF_F_GSO_SOFTWARE | \ NETIF_F_HW_CSUM) |
8560f2266
|
1768 |
|
1da177e4c
|
1769 |
/** |
3144581cb
|
1770 |
* ip6_tnl_dev_setup - setup virtual tunnel device |
1da177e4c
|
1771 1772 1773 1774 1775 |
* @dev: virtual device associated with tunnel * * Description: * Initialize function pointers and device parameters **/ |
3144581cb
|
1776 |
static void ip6_tnl_dev_setup(struct net_device *dev) |
1da177e4c
|
1777 |
{ |
1326c3d5a
|
1778 |
dev->netdev_ops = &ip6_tnl_netdev_ops; |
e53ac9322
|
1779 |
dev->header_ops = &ip_tunnel_header_ops; |
cf124db56
|
1780 1781 |
dev->needs_free_netdev = true; dev->priv_destructor = ip6_dev_free; |
1da177e4c
|
1782 1783 |
dev->type = ARPHRD_TUNNEL6; |
1da177e4c
|
1784 1785 |
dev->flags |= IFF_NOARP; dev->addr_len = sizeof(struct in6_addr); |
058214a4d
|
1786 |
dev->features |= NETIF_F_LLTX; |
028758788
|
1787 |
netif_keep_dst(dev); |
51c052d4f
|
1788 1789 1790 |
dev->features |= IPXIPX_FEATURES; dev->hw_features |= IPXIPX_FEATURES; |
e837735ec
|
1791 1792 1793 |
/* This perm addr will be used as interface identifier by IPv6 */ dev->addr_assign_type = NET_ADDR_RANDOM; eth_random_addr(dev->perm_addr); |
1da177e4c
|
1794 1795 1796 1797 |
} /** |
3144581cb
|
1798 |
* ip6_tnl_dev_init_gen - general initializer for all tunnel devices |
1da177e4c
|
1799 1800 |
* @dev: virtual device associated with tunnel **/ |
8560f2266
|
1801 |
static inline int |
3144581cb
|
1802 |
ip6_tnl_dev_init_gen(struct net_device *dev) |
1da177e4c
|
1803 |
{ |
2941a4863
|
1804 |
struct ip6_tnl *t = netdev_priv(dev); |
cdf3464e6
|
1805 |
int ret; |
058214a4d
|
1806 |
int t_hlen; |
8560f2266
|
1807 |
|
1da177e4c
|
1808 |
t->dev = dev; |
0bd876282
|
1809 |
t->net = dev_net(dev); |
1c213bd24
|
1810 |
dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
8560f2266
|
1811 1812 |
if (!dev->tstats) return -ENOMEM; |
cdf3464e6
|
1813 |
|
607f725f6
|
1814 |
ret = dst_cache_init(&t->dst_cache, GFP_KERNEL); |
0d3c703a9
|
1815 1816 1817 1818 1819 1820 |
if (ret) goto free_stats; ret = gro_cells_init(&t->gro_cells, dev); if (ret) goto destroy_dst; |
cdf3464e6
|
1821 |
|
79ecb90e6
|
1822 |
t->tun_hlen = 0; |
058214a4d
|
1823 1824 1825 1826 1827 1828 1829 1830 |
t->hlen = t->encap_hlen + t->tun_hlen; t_hlen = t->hlen + sizeof(struct ipv6hdr); dev->type = ARPHRD_TUNNEL6; dev->hard_header_len = LL_MAX_HEADER + t_hlen; dev->mtu = ETH_DATA_LEN - t_hlen; if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) dev->mtu -= 8; |
b96f9afee
|
1831 |
dev->min_mtu = ETH_MIN_MTU; |
f7ff1fde9
|
1832 |
dev->max_mtu = IP6_MAX_MTU - dev->hard_header_len; |
79ecb90e6
|
1833 |
|
8560f2266
|
1834 |
return 0; |
0d3c703a9
|
1835 1836 1837 1838 1839 1840 1841 1842 |
destroy_dst: dst_cache_destroy(&t->dst_cache); free_stats: free_percpu(dev->tstats); dev->tstats = NULL; return ret; |
1da177e4c
|
1843 1844 1845 |
} /** |
3144581cb
|
1846 |
* ip6_tnl_dev_init - initializer for all non fallback tunnel devices |
1da177e4c
|
1847 1848 |
* @dev: virtual device associated with tunnel **/ |
8560f2266
|
1849 |
static int ip6_tnl_dev_init(struct net_device *dev) |
1da177e4c
|
1850 |
{ |
2941a4863
|
1851 |
struct ip6_tnl *t = netdev_priv(dev); |
8560f2266
|
1852 1853 1854 1855 |
int err = ip6_tnl_dev_init_gen(dev); if (err) return err; |
3144581cb
|
1856 |
ip6_tnl_link_config(t); |
5311a69aa
|
1857 |
if (t->parms.collect_md) |
8d79266bc
|
1858 |
netif_keep_dst(dev); |
8560f2266
|
1859 |
return 0; |
1da177e4c
|
1860 1861 1862 |
} /** |
3144581cb
|
1863 |
* ip6_fb_tnl_dev_init - initializer for fallback tunnel device |
1da177e4c
|
1864 1865 1866 1867 |
* @dev: fallback device * * Return: 0 **/ |
8560f2266
|
1868 |
static int __net_init ip6_fb_tnl_dev_init(struct net_device *dev) |
1da177e4c
|
1869 |
{ |
2941a4863
|
1870 |
struct ip6_tnl *t = netdev_priv(dev); |
3e6c9fb5f
|
1871 1872 |
struct net *net = dev_net(dev); struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
502b09356
|
1873 |
t->parms.proto = IPPROTO_IPV6; |
1da177e4c
|
1874 |
dev_hold(dev); |
d0087b29f
|
1875 |
|
cf778b00e
|
1876 |
rcu_assign_pointer(ip6n->tnls_wc[0], t); |
8560f2266
|
1877 |
return 0; |
1da177e4c
|
1878 |
} |
a8b8a889e
|
1879 1880 |
static int ip6_tnl_validate(struct nlattr *tb[], struct nlattr *data[], struct netlink_ext_ack *extack) |
0b1124572
|
1881 1882 |
{ u8 proto; |
c8965932a
|
1883 |
if (!data || !data[IFLA_IPTUN_PROTO]) |
0b1124572
|
1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 |
return 0; proto = nla_get_u8(data[IFLA_IPTUN_PROTO]); if (proto != IPPROTO_IPV6 && proto != IPPROTO_IPIP && proto != 0) return -EINVAL; return 0; } static void ip6_tnl_netlink_parms(struct nlattr *data[], struct __ip6_tnl_parm *parms) { memset(parms, 0, sizeof(*parms)); if (!data) return; if (data[IFLA_IPTUN_LINK]) parms->link = nla_get_u32(data[IFLA_IPTUN_LINK]); if (data[IFLA_IPTUN_LOCAL]) |
67b61f6c1
|
1907 |
parms->laddr = nla_get_in6_addr(data[IFLA_IPTUN_LOCAL]); |
0b1124572
|
1908 1909 |
if (data[IFLA_IPTUN_REMOTE]) |
67b61f6c1
|
1910 |
parms->raddr = nla_get_in6_addr(data[IFLA_IPTUN_REMOTE]); |
0b1124572
|
1911 1912 1913 1914 1915 1916 1917 1918 |
if (data[IFLA_IPTUN_TTL]) parms->hop_limit = nla_get_u8(data[IFLA_IPTUN_TTL]); if (data[IFLA_IPTUN_ENCAP_LIMIT]) parms->encap_limit = nla_get_u8(data[IFLA_IPTUN_ENCAP_LIMIT]); if (data[IFLA_IPTUN_FLOWINFO]) |
1ff05fb71
|
1919 |
parms->flowinfo = nla_get_be32(data[IFLA_IPTUN_FLOWINFO]); |
0b1124572
|
1920 1921 1922 1923 1924 1925 |
if (data[IFLA_IPTUN_FLAGS]) parms->flags = nla_get_u32(data[IFLA_IPTUN_FLAGS]); if (data[IFLA_IPTUN_PROTO]) parms->proto = nla_get_u8(data[IFLA_IPTUN_PROTO]); |
8d79266bc
|
1926 1927 1928 |
if (data[IFLA_IPTUN_COLLECT_METADATA]) parms->collect_md = true; |
0a473b82c
|
1929 1930 1931 |
if (data[IFLA_IPTUN_FWMARK]) parms->fwmark = nla_get_u32(data[IFLA_IPTUN_FWMARK]); |
0b1124572
|
1932 |
} |
b3a27b519
|
1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 |
static bool ip6_tnl_netlink_encap_parms(struct nlattr *data[], struct ip_tunnel_encap *ipencap) { bool ret = false; memset(ipencap, 0, sizeof(*ipencap)); if (!data) return ret; if (data[IFLA_IPTUN_ENCAP_TYPE]) { ret = true; ipencap->type = nla_get_u16(data[IFLA_IPTUN_ENCAP_TYPE]); } if (data[IFLA_IPTUN_ENCAP_FLAGS]) { ret = true; ipencap->flags = nla_get_u16(data[IFLA_IPTUN_ENCAP_FLAGS]); } if (data[IFLA_IPTUN_ENCAP_SPORT]) { ret = true; ipencap->sport = nla_get_be16(data[IFLA_IPTUN_ENCAP_SPORT]); } if (data[IFLA_IPTUN_ENCAP_DPORT]) { ret = true; ipencap->dport = nla_get_be16(data[IFLA_IPTUN_ENCAP_DPORT]); } return ret; } |
0b1124572
|
1965 |
static int ip6_tnl_newlink(struct net *src_net, struct net_device *dev, |
7a3f4a185
|
1966 1967 |
struct nlattr *tb[], struct nlattr *data[], struct netlink_ext_ack *extack) |
0b1124572
|
1968 1969 |
{ struct net *net = dev_net(dev); |
8d79266bc
|
1970 |
struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
b3a27b519
|
1971 |
struct ip_tunnel_encap ipencap; |
a6aa80446
|
1972 1973 |
struct ip6_tnl *nt, *t; int err; |
0b1124572
|
1974 1975 |
nt = netdev_priv(dev); |
b3a27b519
|
1976 1977 |
if (ip6_tnl_netlink_encap_parms(data, &ipencap)) { |
a6aa80446
|
1978 |
err = ip6_tnl_encap_setup(nt, &ipencap); |
b3a27b519
|
1979 1980 1981 |
if (err < 0) return err; } |
0b1124572
|
1982 |
ip6_tnl_netlink_parms(data, &nt->parms); |
8d79266bc
|
1983 1984 1985 1986 1987 1988 1989 1990 |
if (nt->parms.collect_md) { if (rtnl_dereference(ip6n->collect_md_tun)) return -EEXIST; } else { t = ip6_tnl_locate(net, &nt->parms, 0); if (!IS_ERR(t)) return -EEXIST; } |
0b1124572
|
1991 |
|
a6aa80446
|
1992 1993 1994 1995 1996 |
err = ip6_tnl_create2(dev); if (!err && tb[IFLA_MTU]) ip6_tnl_change_mtu(dev, nla_get_u32(tb[IFLA_MTU])); return err; |
0b1124572
|
1997 1998 1999 |
} static int ip6_tnl_changelink(struct net_device *dev, struct nlattr *tb[], |
ad744b223
|
2000 2001 |
struct nlattr *data[], struct netlink_ext_ack *extack) |
0b1124572
|
2002 |
{ |
0bd876282
|
2003 |
struct ip6_tnl *t = netdev_priv(dev); |
0b1124572
|
2004 |
struct __ip6_tnl_parm p; |
0bd876282
|
2005 |
struct net *net = t->net; |
0b1124572
|
2006 |
struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
b3a27b519
|
2007 |
struct ip_tunnel_encap ipencap; |
0b1124572
|
2008 2009 2010 |
if (dev == ip6n->fb_tnl_dev) return -EINVAL; |
b3a27b519
|
2011 2012 2013 2014 2015 2016 |
if (ip6_tnl_netlink_encap_parms(data, &ipencap)) { int err = ip6_tnl_encap_setup(t, &ipencap); if (err < 0) return err; } |
0b1124572
|
2017 |
ip6_tnl_netlink_parms(data, &p); |
8d79266bc
|
2018 2019 |
if (p.collect_md) return -EINVAL; |
0b1124572
|
2020 2021 |
t = ip6_tnl_locate(net, &p, 0); |
37355565b
|
2022 |
if (!IS_ERR(t)) { |
0b1124572
|
2023 2024 2025 2026 2027 2028 2029 |
if (t->dev != dev) return -EEXIST; } else t = netdev_priv(dev); return ip6_tnl_update(t, &p); } |
1e9f3d6f1
|
2030 2031 2032 2033 2034 2035 2036 2037 |
static void ip6_tnl_dellink(struct net_device *dev, struct list_head *head) { struct net *net = dev_net(dev); struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); if (dev != ip6n->fb_tnl_dev) unregister_netdevice_queue(dev, head); } |
b58d731ac
|
2038 |
static size_t ip6_tnl_get_size(const struct net_device *dev) |
c075b1309
|
2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 |
{ return /* IFLA_IPTUN_LINK */ nla_total_size(4) + /* IFLA_IPTUN_LOCAL */ nla_total_size(sizeof(struct in6_addr)) + /* IFLA_IPTUN_REMOTE */ nla_total_size(sizeof(struct in6_addr)) + /* IFLA_IPTUN_TTL */ nla_total_size(1) + /* IFLA_IPTUN_ENCAP_LIMIT */ nla_total_size(1) + /* IFLA_IPTUN_FLOWINFO */ nla_total_size(4) + /* IFLA_IPTUN_FLAGS */ nla_total_size(4) + |
cfa323b6b
|
2055 2056 |
/* IFLA_IPTUN_PROTO */ nla_total_size(1) + |
b3a27b519
|
2057 2058 2059 2060 2061 2062 2063 2064 |
/* IFLA_IPTUN_ENCAP_TYPE */ nla_total_size(2) + /* IFLA_IPTUN_ENCAP_FLAGS */ nla_total_size(2) + /* IFLA_IPTUN_ENCAP_SPORT */ nla_total_size(2) + /* IFLA_IPTUN_ENCAP_DPORT */ nla_total_size(2) + |
8d79266bc
|
2065 2066 |
/* IFLA_IPTUN_COLLECT_METADATA */ nla_total_size(0) + |
0a473b82c
|
2067 2068 |
/* IFLA_IPTUN_FWMARK */ nla_total_size(4) + |
c075b1309
|
2069 2070 |
0; } |
b58d731ac
|
2071 |
static int ip6_tnl_fill_info(struct sk_buff *skb, const struct net_device *dev) |
c075b1309
|
2072 2073 2074 2075 2076 |
{ struct ip6_tnl *tunnel = netdev_priv(dev); struct __ip6_tnl_parm *parm = &tunnel->parms; if (nla_put_u32(skb, IFLA_IPTUN_LINK, parm->link) || |
930345ea6
|
2077 2078 |
nla_put_in6_addr(skb, IFLA_IPTUN_LOCAL, &parm->laddr) || nla_put_in6_addr(skb, IFLA_IPTUN_REMOTE, &parm->raddr) || |
c075b1309
|
2079 2080 2081 |
nla_put_u8(skb, IFLA_IPTUN_TTL, parm->hop_limit) || nla_put_u8(skb, IFLA_IPTUN_ENCAP_LIMIT, parm->encap_limit) || nla_put_be32(skb, IFLA_IPTUN_FLOWINFO, parm->flowinfo) || |
cfa323b6b
|
2082 |
nla_put_u32(skb, IFLA_IPTUN_FLAGS, parm->flags) || |
0a473b82c
|
2083 2084 |
nla_put_u8(skb, IFLA_IPTUN_PROTO, parm->proto) || nla_put_u32(skb, IFLA_IPTUN_FWMARK, parm->fwmark)) |
c075b1309
|
2085 |
goto nla_put_failure; |
b3a27b519
|
2086 |
|
8d79266bc
|
2087 2088 2089 2090 |
if (nla_put_u16(skb, IFLA_IPTUN_ENCAP_TYPE, tunnel->encap.type) || nla_put_be16(skb, IFLA_IPTUN_ENCAP_SPORT, tunnel->encap.sport) || nla_put_be16(skb, IFLA_IPTUN_ENCAP_DPORT, tunnel->encap.dport) || nla_put_u16(skb, IFLA_IPTUN_ENCAP_FLAGS, tunnel->encap.flags)) |
b3a27b519
|
2091 |
goto nla_put_failure; |
8d79266bc
|
2092 2093 2094 |
if (parm->collect_md) if (nla_put_flag(skb, IFLA_IPTUN_COLLECT_METADATA)) goto nla_put_failure; |
0a473b82c
|
2095 |
|
c075b1309
|
2096 2097 2098 2099 2100 |
return 0; nla_put_failure: return -EMSGSIZE; } |
1728d4fab
|
2101 2102 2103 2104 2105 2106 2107 |
struct net *ip6_tnl_get_link_net(const struct net_device *dev) { struct ip6_tnl *tunnel = netdev_priv(dev); return tunnel->net; } EXPORT_SYMBOL(ip6_tnl_get_link_net); |
0b1124572
|
2108 2109 2110 2111 2112 2113 2114 2115 2116 |
static const struct nla_policy ip6_tnl_policy[IFLA_IPTUN_MAX + 1] = { [IFLA_IPTUN_LINK] = { .type = NLA_U32 }, [IFLA_IPTUN_LOCAL] = { .len = sizeof(struct in6_addr) }, [IFLA_IPTUN_REMOTE] = { .len = sizeof(struct in6_addr) }, [IFLA_IPTUN_TTL] = { .type = NLA_U8 }, [IFLA_IPTUN_ENCAP_LIMIT] = { .type = NLA_U8 }, [IFLA_IPTUN_FLOWINFO] = { .type = NLA_U32 }, [IFLA_IPTUN_FLAGS] = { .type = NLA_U32 }, [IFLA_IPTUN_PROTO] = { .type = NLA_U8 }, |
b3a27b519
|
2117 2118 2119 2120 |
[IFLA_IPTUN_ENCAP_TYPE] = { .type = NLA_U16 }, [IFLA_IPTUN_ENCAP_FLAGS] = { .type = NLA_U16 }, [IFLA_IPTUN_ENCAP_SPORT] = { .type = NLA_U16 }, [IFLA_IPTUN_ENCAP_DPORT] = { .type = NLA_U16 }, |
8d79266bc
|
2121 |
[IFLA_IPTUN_COLLECT_METADATA] = { .type = NLA_FLAG }, |
0a473b82c
|
2122 |
[IFLA_IPTUN_FWMARK] = { .type = NLA_U32 }, |
0b1124572
|
2123 |
}; |
c075b1309
|
2124 2125 2126 |
static struct rtnl_link_ops ip6_link_ops __read_mostly = { .kind = "ip6tnl", .maxtype = IFLA_IPTUN_MAX, |
0b1124572
|
2127 |
.policy = ip6_tnl_policy, |
c075b1309
|
2128 |
.priv_size = sizeof(struct ip6_tnl), |
0b1124572
|
2129 2130 2131 2132 |
.setup = ip6_tnl_dev_setup, .validate = ip6_tnl_validate, .newlink = ip6_tnl_newlink, .changelink = ip6_tnl_changelink, |
1e9f3d6f1
|
2133 |
.dellink = ip6_tnl_dellink, |
b58d731ac
|
2134 2135 |
.get_size = ip6_tnl_get_size, .fill_info = ip6_tnl_fill_info, |
1728d4fab
|
2136 |
.get_link_net = ip6_tnl_get_link_net, |
c075b1309
|
2137 |
}; |
3ff2cfa55
|
2138 |
static struct xfrm6_tunnel ip4ip6_handler __read_mostly = { |
c4d3efafc
|
2139 2140 2141 2142 |
.handler = ip4ip6_rcv, .err_handler = ip4ip6_err, .priority = 1, }; |
3ff2cfa55
|
2143 |
static struct xfrm6_tunnel ip6ip6_handler __read_mostly = { |
0303770de
|
2144 2145 |
.handler = ip6ip6_rcv, .err_handler = ip6ip6_err, |
d2acc3479
|
2146 |
.priority = 1, |
1da177e4c
|
2147 |
}; |
f200e98d9
|
2148 2149 2150 2151 2152 |
static struct xfrm6_tunnel mplsip6_handler __read_mostly = { .handler = mplsip6_rcv, .err_handler = mplsip6_err, .priority = 1, }; |
bb401caef
|
2153 |
static void __net_exit ip6_tnl_destroy_tunnels(struct net *net, struct list_head *list) |
3e6c9fb5f
|
2154 |
{ |
1e9f3d6f1
|
2155 |
struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
0bd876282
|
2156 |
struct net_device *dev, *aux; |
3e6c9fb5f
|
2157 2158 |
int h; struct ip6_tnl *t; |
0bd876282
|
2159 2160 |
for_each_netdev_safe(net, dev, aux) if (dev->rtnl_link_ops == &ip6_link_ops) |
bb401caef
|
2161 |
unregister_netdevice_queue(dev, list); |
0bd876282
|
2162 |
|
e87a8f24c
|
2163 |
for (h = 0; h < IP6_TUNNEL_HASH_SIZE; h++) { |
947676326
|
2164 |
t = rtnl_dereference(ip6n->tnls_r_l[h]); |
53b24b8f9
|
2165 |
while (t) { |
0bd876282
|
2166 2167 2168 2169 |
/* If dev is in the same netns, it has already * been added to the list by the previous loop. */ if (!net_eq(dev_net(t->dev), net)) |
bb401caef
|
2170 |
unregister_netdevice_queue(t->dev, list); |
947676326
|
2171 |
t = rtnl_dereference(t->next); |
cf4432f55
|
2172 |
} |
3e6c9fb5f
|
2173 |
} |
3e6c9fb5f
|
2174 |
} |
2c8c1e729
|
2175 |
static int __net_init ip6_tnl_init_net(struct net *net) |
13eeb8e92
|
2176 |
{ |
ac31cd3cb
|
2177 |
struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
731abb9cb
|
2178 |
struct ip6_tnl *t = NULL; |
13eeb8e92
|
2179 |
int err; |
13eeb8e92
|
2180 |
|
3e6c9fb5f
|
2181 2182 |
ip6n->tnls[0] = ip6n->tnls_wc; ip6n->tnls[1] = ip6n->tnls_r_l; |
79134e6ce
|
2183 2184 |
if (!net_has_fallback_tunnels(net)) return 0; |
15820e129
|
2185 2186 |
err = -ENOMEM; ip6n->fb_tnl_dev = alloc_netdev(sizeof(struct ip6_tnl), "ip6tnl0", |
c835a6773
|
2187 |
NET_NAME_UNKNOWN, ip6_tnl_dev_setup); |
15820e129
|
2188 2189 2190 |
if (!ip6n->fb_tnl_dev) goto err_alloc_dev; |
be77e5930
|
2191 |
dev_net_set(ip6n->fb_tnl_dev, net); |
bb8140947
|
2192 |
ip6n->fb_tnl_dev->rtnl_link_ops = &ip6_link_ops; |
0bd876282
|
2193 2194 2195 2196 |
/* FB netdevice is special: we have one, and only one per netns. * Allowing to move it to another netns is clearly unsafe. */ ip6n->fb_tnl_dev->features |= NETIF_F_NETNS_LOCAL; |
15820e129
|
2197 |
|
8560f2266
|
2198 2199 2200 |
err = ip6_fb_tnl_dev_init(ip6n->fb_tnl_dev); if (err < 0) goto err_register; |
15820e129
|
2201 2202 2203 2204 |
err = register_netdev(ip6n->fb_tnl_dev); if (err < 0) goto err_register; |
731abb9cb
|
2205 2206 2207 2208 |
t = netdev_priv(ip6n->fb_tnl_dev); strcpy(t->parms.name, ip6n->fb_tnl_dev->name); |
13eeb8e92
|
2209 |
return 0; |
15820e129
|
2210 |
err_register: |
cf124db56
|
2211 |
free_netdev(ip6n->fb_tnl_dev); |
15820e129
|
2212 |
err_alloc_dev: |
13eeb8e92
|
2213 2214 |
return err; } |
bb401caef
|
2215 |
static void __net_exit ip6_tnl_exit_batch_net(struct list_head *net_list) |
13eeb8e92
|
2216 |
{ |
bb401caef
|
2217 2218 |
struct net *net; LIST_HEAD(list); |
3e6c9fb5f
|
2219 |
rtnl_lock(); |
bb401caef
|
2220 2221 2222 |
list_for_each_entry(net, net_list, exit_list) ip6_tnl_destroy_tunnels(net, &list); unregister_netdevice_many(&list); |
3e6c9fb5f
|
2223 |
rtnl_unlock(); |
13eeb8e92
|
2224 2225 2226 2227 |
} static struct pernet_operations ip6_tnl_net_ops = { .init = ip6_tnl_init_net, |
bb401caef
|
2228 |
.exit_batch = ip6_tnl_exit_batch_net, |
ac31cd3cb
|
2229 2230 |
.id = &ip6_tnl_net_id, .size = sizeof(struct ip6_tnl_net), |
13eeb8e92
|
2231 |
}; |
1da177e4c
|
2232 2233 2234 2235 2236 2237 2238 2239 2240 |
/** * ip6_tunnel_init - register protocol and reserve needed resources * * Return: 0 on success **/ static int __init ip6_tunnel_init(void) { int err; |
8c22dab03
|
2241 2242 |
if (!ipv6_mod_enabled()) return -EOPNOTSUPP; |
d5aa407f5
|
2243 2244 2245 2246 2247 2248 |
err = register_pernet_device(&ip6_tnl_net_ops); if (err < 0) goto out_pernet; err = xfrm6_tunnel_register(&ip4ip6_handler, AF_INET); if (err < 0) { |
f32138319
|
2249 2250 |
pr_err("%s: can't register ip4ip6 ", __func__); |
d5aa407f5
|
2251 |
goto out_ip4ip6; |
c4d3efafc
|
2252 |
} |
d5aa407f5
|
2253 2254 |
err = xfrm6_tunnel_register(&ip6ip6_handler, AF_INET6); if (err < 0) { |
f32138319
|
2255 2256 |
pr_err("%s: can't register ip6ip6 ", __func__); |
d5aa407f5
|
2257 |
goto out_ip6ip6; |
1da177e4c
|
2258 |
} |
f200e98d9
|
2259 2260 2261 2262 2263 2264 2265 2266 2267 |
if (ip6_tnl_mpls_supported()) { err = xfrm6_tunnel_register(&mplsip6_handler, AF_MPLS); if (err < 0) { pr_err("%s: can't register mplsip6 ", __func__); goto out_mplsip6; } } |
c075b1309
|
2268 2269 2270 |
err = rtnl_link_register(&ip6_link_ops); if (err < 0) goto rtnl_link_failed; |
13eeb8e92
|
2271 |
|
1da177e4c
|
2272 |
return 0; |
d5aa407f5
|
2273 |
|
c075b1309
|
2274 |
rtnl_link_failed: |
f200e98d9
|
2275 2276 2277 |
if (ip6_tnl_mpls_supported()) xfrm6_tunnel_deregister(&mplsip6_handler, AF_MPLS); out_mplsip6: |
c075b1309
|
2278 |
xfrm6_tunnel_deregister(&ip6ip6_handler, AF_INET6); |
d5aa407f5
|
2279 |
out_ip6ip6: |
c4d3efafc
|
2280 |
xfrm6_tunnel_deregister(&ip4ip6_handler, AF_INET); |
d5aa407f5
|
2281 2282 2283 |
out_ip4ip6: unregister_pernet_device(&ip6_tnl_net_ops); out_pernet: |
1da177e4c
|
2284 2285 2286 2287 2288 2289 2290 2291 2292 |
return err; } /** * ip6_tunnel_cleanup - free resources and unregister protocol **/ static void __exit ip6_tunnel_cleanup(void) { |
c075b1309
|
2293 |
rtnl_link_unregister(&ip6_link_ops); |
c4d3efafc
|
2294 |
if (xfrm6_tunnel_deregister(&ip4ip6_handler, AF_INET)) |
f32138319
|
2295 2296 |
pr_info("%s: can't deregister ip4ip6 ", __func__); |
c4d3efafc
|
2297 |
|
73d605d1a
|
2298 |
if (xfrm6_tunnel_deregister(&ip6ip6_handler, AF_INET6)) |
f32138319
|
2299 2300 |
pr_info("%s: can't deregister ip6ip6 ", __func__); |
1da177e4c
|
2301 |
|
f200e98d9
|
2302 2303 2304 2305 |
if (ip6_tnl_mpls_supported() && xfrm6_tunnel_deregister(&mplsip6_handler, AF_MPLS)) pr_info("%s: can't deregister mplsip6 ", __func__); |
ac31cd3cb
|
2306 |
unregister_pernet_device(&ip6_tnl_net_ops); |
1da177e4c
|
2307 2308 2309 2310 |
} module_init(ip6_tunnel_init); module_exit(ip6_tunnel_cleanup); |