3822 lines
100 KiB
C
3822 lines
100 KiB
C
/*
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* net/key/af_key.c An implementation of PF_KEYv2 sockets.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Maxim Giryaev <gem@asplinux.ru>
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* David S. Miller <davem@redhat.com>
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* Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
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* Kunihiro Ishiguro <kunihiro@ipinfusion.com>
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* Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
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* Derek Atkins <derek@ihtfp.com>
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*/
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#include <linux/capability.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/socket.h>
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#include <linux/pfkeyv2.h>
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#include <linux/ipsec.h>
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#include <linux/skbuff.h>
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#include <linux/rtnetlink.h>
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <linux/proc_fs.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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#include <net/xfrm.h>
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#include <net/sock.h>
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#define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
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#define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
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static int pfkey_net_id __read_mostly;
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struct netns_pfkey {
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/* List of all pfkey sockets. */
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struct hlist_head table;
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atomic_t socks_nr;
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};
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static DEFINE_MUTEX(pfkey_mutex);
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#define DUMMY_MARK 0
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static struct xfrm_mark dummy_mark = {0, 0};
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struct pfkey_sock {
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/* struct sock must be the first member of struct pfkey_sock */
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struct sock sk;
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int registered;
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int promisc;
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struct {
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uint8_t msg_version;
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uint32_t msg_portid;
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int (*dump)(struct pfkey_sock *sk);
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void (*done)(struct pfkey_sock *sk);
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union {
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struct xfrm_policy_walk policy;
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struct xfrm_state_walk state;
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} u;
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struct sk_buff *skb;
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} dump;
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};
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static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
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{
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return (struct pfkey_sock *)sk;
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}
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static int pfkey_can_dump(const struct sock *sk)
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{
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if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
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return 1;
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return 0;
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}
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static void pfkey_terminate_dump(struct pfkey_sock *pfk)
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{
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if (pfk->dump.dump) {
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if (pfk->dump.skb) {
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kfree_skb(pfk->dump.skb);
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pfk->dump.skb = NULL;
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}
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pfk->dump.done(pfk);
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pfk->dump.dump = NULL;
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pfk->dump.done = NULL;
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}
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}
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static void pfkey_sock_destruct(struct sock *sk)
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{
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struct net *net = sock_net(sk);
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struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
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pfkey_terminate_dump(pfkey_sk(sk));
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skb_queue_purge(&sk->sk_receive_queue);
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if (!sock_flag(sk, SOCK_DEAD)) {
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pr_err("Attempt to release alive pfkey socket: %p\n", sk);
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return;
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}
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WARN_ON(atomic_read(&sk->sk_rmem_alloc));
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WARN_ON(atomic_read(&sk->sk_wmem_alloc));
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atomic_dec(&net_pfkey->socks_nr);
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}
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static const struct proto_ops pfkey_ops;
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static void pfkey_insert(struct sock *sk)
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{
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struct net *net = sock_net(sk);
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struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
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mutex_lock(&pfkey_mutex);
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sk_add_node_rcu(sk, &net_pfkey->table);
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mutex_unlock(&pfkey_mutex);
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}
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static void pfkey_remove(struct sock *sk)
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{
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mutex_lock(&pfkey_mutex);
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sk_del_node_init_rcu(sk);
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mutex_unlock(&pfkey_mutex);
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}
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static struct proto key_proto = {
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.name = "KEY",
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.owner = THIS_MODULE,
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.obj_size = sizeof(struct pfkey_sock),
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};
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static int pfkey_create(struct net *net, struct socket *sock, int protocol,
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int kern)
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{
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struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
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struct sock *sk;
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int err;
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if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
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return -EPERM;
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if (sock->type != SOCK_RAW)
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return -ESOCKTNOSUPPORT;
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if (protocol != PF_KEY_V2)
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return -EPROTONOSUPPORT;
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err = -ENOMEM;
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sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
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if (sk == NULL)
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goto out;
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sock->ops = &pfkey_ops;
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sock_init_data(sock, sk);
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sk->sk_family = PF_KEY;
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sk->sk_destruct = pfkey_sock_destruct;
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atomic_inc(&net_pfkey->socks_nr);
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pfkey_insert(sk);
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return 0;
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out:
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return err;
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}
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static int pfkey_release(struct socket *sock)
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{
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struct sock *sk = sock->sk;
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if (!sk)
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return 0;
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pfkey_remove(sk);
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sock_orphan(sk);
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sock->sk = NULL;
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skb_queue_purge(&sk->sk_write_queue);
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synchronize_rcu();
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sock_put(sk);
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return 0;
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}
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static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
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gfp_t allocation, struct sock *sk)
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{
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int err = -ENOBUFS;
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sock_hold(sk);
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if (*skb2 == NULL) {
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if (atomic_read(&skb->users) != 1) {
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*skb2 = skb_clone(skb, allocation);
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} else {
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*skb2 = skb;
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atomic_inc(&skb->users);
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}
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}
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if (*skb2 != NULL) {
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if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
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skb_orphan(*skb2);
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skb_set_owner_r(*skb2, sk);
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skb_queue_tail(&sk->sk_receive_queue, *skb2);
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sk->sk_data_ready(sk, (*skb2)->len);
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*skb2 = NULL;
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err = 0;
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}
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}
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sock_put(sk);
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return err;
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}
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/* Send SKB to all pfkey sockets matching selected criteria. */
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#define BROADCAST_ALL 0
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#define BROADCAST_ONE 1
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#define BROADCAST_REGISTERED 2
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#define BROADCAST_PROMISC_ONLY 4
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static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
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int broadcast_flags, struct sock *one_sk,
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struct net *net)
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{
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struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
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struct sock *sk;
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struct hlist_node *node;
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struct sk_buff *skb2 = NULL;
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int err = -ESRCH;
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/* XXX Do we need something like netlink_overrun? I think
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* XXX PF_KEY socket apps will not mind current behavior.
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*/
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if (!skb)
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return -ENOMEM;
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rcu_read_lock();
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sk_for_each_rcu(sk, node, &net_pfkey->table) {
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struct pfkey_sock *pfk = pfkey_sk(sk);
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int err2;
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/* Yes, it means that if you are meant to receive this
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* pfkey message you receive it twice as promiscuous
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* socket.
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*/
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if (pfk->promisc)
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pfkey_broadcast_one(skb, &skb2, allocation, sk);
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/* the exact target will be processed later */
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if (sk == one_sk)
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continue;
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if (broadcast_flags != BROADCAST_ALL) {
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if (broadcast_flags & BROADCAST_PROMISC_ONLY)
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continue;
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if ((broadcast_flags & BROADCAST_REGISTERED) &&
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!pfk->registered)
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continue;
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if (broadcast_flags & BROADCAST_ONE)
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continue;
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}
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err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
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/* Error is cleare after succecful sending to at least one
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* registered KM */
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if ((broadcast_flags & BROADCAST_REGISTERED) && err)
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err = err2;
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}
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rcu_read_unlock();
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if (one_sk != NULL)
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err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
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kfree_skb(skb2);
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kfree_skb(skb);
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return err;
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}
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static int pfkey_do_dump(struct pfkey_sock *pfk)
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{
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struct sadb_msg *hdr;
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int rc;
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rc = pfk->dump.dump(pfk);
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if (rc == -ENOBUFS)
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return 0;
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if (pfk->dump.skb) {
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if (!pfkey_can_dump(&pfk->sk))
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return 0;
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hdr = (struct sadb_msg *) pfk->dump.skb->data;
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hdr->sadb_msg_seq = 0;
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hdr->sadb_msg_errno = rc;
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pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
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&pfk->sk, sock_net(&pfk->sk));
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pfk->dump.skb = NULL;
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}
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pfkey_terminate_dump(pfk);
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return rc;
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}
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static inline void pfkey_hdr_dup(struct sadb_msg *new,
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const struct sadb_msg *orig)
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{
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*new = *orig;
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}
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static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk)
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{
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struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
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struct sadb_msg *hdr;
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if (!skb)
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return -ENOBUFS;
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/* Woe be to the platform trying to support PFKEY yet
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* having normal errnos outside the 1-255 range, inclusive.
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*/
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err = -err;
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if (err == ERESTARTSYS ||
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err == ERESTARTNOHAND ||
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err == ERESTARTNOINTR)
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err = EINTR;
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if (err >= 512)
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err = EINVAL;
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BUG_ON(err <= 0 || err >= 256);
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hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
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pfkey_hdr_dup(hdr, orig);
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hdr->sadb_msg_errno = (uint8_t) err;
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hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
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sizeof(uint64_t));
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pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk));
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return 0;
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}
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static u8 sadb_ext_min_len[] = {
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[SADB_EXT_RESERVED] = (u8) 0,
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[SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
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[SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
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[SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
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[SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
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[SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
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[SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
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[SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
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[SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
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[SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
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[SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
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[SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
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[SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
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[SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
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[SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
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[SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
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[SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
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[SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
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[SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
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[SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
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[SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
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[SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
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[SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
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[SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
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[SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
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[SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress),
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};
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/* Verify sadb_address_{len,prefixlen} against sa_family. */
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static int verify_address_len(const void *p)
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{
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const struct sadb_address *sp = p;
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const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
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const struct sockaddr_in *sin;
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#if IS_ENABLED(CONFIG_IPV6)
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const struct sockaddr_in6 *sin6;
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#endif
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int len;
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switch (addr->sa_family) {
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case AF_INET:
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len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
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if (sp->sadb_address_len != len ||
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sp->sadb_address_prefixlen > 32)
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return -EINVAL;
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break;
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#if IS_ENABLED(CONFIG_IPV6)
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case AF_INET6:
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len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
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if (sp->sadb_address_len != len ||
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sp->sadb_address_prefixlen > 128)
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return -EINVAL;
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break;
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#endif
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default:
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/* It is user using kernel to keep track of security
|
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* associations for another protocol, such as
|
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* OSPF/RSVP/RIPV2/MIP. It is user's job to verify
|
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* lengths.
|
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*
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* XXX Actually, association/policy database is not yet
|
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* XXX able to cope with arbitrary sockaddr families.
|
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* XXX When it can, remove this -EINVAL. -DaveM
|
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*/
|
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return -EINVAL;
|
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break;
|
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}
|
|
|
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return 0;
|
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}
|
|
|
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static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
|
|
{
|
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return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
|
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sec_ctx->sadb_x_ctx_len,
|
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sizeof(uint64_t));
|
|
}
|
|
|
|
static inline int verify_sec_ctx_len(const void *p)
|
|
{
|
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const struct sadb_x_sec_ctx *sec_ctx = p;
|
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int len = sec_ctx->sadb_x_ctx_len;
|
|
|
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if (len > PAGE_SIZE)
|
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return -EINVAL;
|
|
|
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len = pfkey_sec_ctx_len(sec_ctx);
|
|
|
|
if (sec_ctx->sadb_x_sec_len != len)
|
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return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx)
|
|
{
|
|
struct xfrm_user_sec_ctx *uctx = NULL;
|
|
int ctx_size = sec_ctx->sadb_x_ctx_len;
|
|
|
|
uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);
|
|
|
|
if (!uctx)
|
|
return NULL;
|
|
|
|
uctx->len = pfkey_sec_ctx_len(sec_ctx);
|
|
uctx->exttype = sec_ctx->sadb_x_sec_exttype;
|
|
uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
|
|
uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
|
|
uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
|
|
memcpy(uctx + 1, sec_ctx + 1,
|
|
uctx->ctx_len);
|
|
|
|
return uctx;
|
|
}
|
|
|
|
static int present_and_same_family(const struct sadb_address *src,
|
|
const struct sadb_address *dst)
|
|
{
|
|
const struct sockaddr *s_addr, *d_addr;
|
|
|
|
if (!src || !dst)
|
|
return 0;
|
|
|
|
s_addr = (const struct sockaddr *)(src + 1);
|
|
d_addr = (const struct sockaddr *)(dst + 1);
|
|
if (s_addr->sa_family != d_addr->sa_family)
|
|
return 0;
|
|
if (s_addr->sa_family != AF_INET
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
&& s_addr->sa_family != AF_INET6
|
|
#endif
|
|
)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs)
|
|
{
|
|
const char *p = (char *) hdr;
|
|
int len = skb->len;
|
|
|
|
len -= sizeof(*hdr);
|
|
p += sizeof(*hdr);
|
|
while (len > 0) {
|
|
const struct sadb_ext *ehdr = (const struct sadb_ext *) p;
|
|
uint16_t ext_type;
|
|
int ext_len;
|
|
|
|
ext_len = ehdr->sadb_ext_len;
|
|
ext_len *= sizeof(uint64_t);
|
|
ext_type = ehdr->sadb_ext_type;
|
|
if (ext_len < sizeof(uint64_t) ||
|
|
ext_len > len ||
|
|
ext_type == SADB_EXT_RESERVED)
|
|
return -EINVAL;
|
|
|
|
if (ext_type <= SADB_EXT_MAX) {
|
|
int min = (int) sadb_ext_min_len[ext_type];
|
|
if (ext_len < min)
|
|
return -EINVAL;
|
|
if (ext_hdrs[ext_type-1] != NULL)
|
|
return -EINVAL;
|
|
if (ext_type == SADB_EXT_ADDRESS_SRC ||
|
|
ext_type == SADB_EXT_ADDRESS_DST ||
|
|
ext_type == SADB_EXT_ADDRESS_PROXY ||
|
|
ext_type == SADB_X_EXT_NAT_T_OA) {
|
|
if (verify_address_len(p))
|
|
return -EINVAL;
|
|
}
|
|
if (ext_type == SADB_X_EXT_SEC_CTX) {
|
|
if (verify_sec_ctx_len(p))
|
|
return -EINVAL;
|
|
}
|
|
ext_hdrs[ext_type-1] = (void *) p;
|
|
}
|
|
p += ext_len;
|
|
len -= ext_len;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static uint16_t
|
|
pfkey_satype2proto(uint8_t satype)
|
|
{
|
|
switch (satype) {
|
|
case SADB_SATYPE_UNSPEC:
|
|
return IPSEC_PROTO_ANY;
|
|
case SADB_SATYPE_AH:
|
|
return IPPROTO_AH;
|
|
case SADB_SATYPE_ESP:
|
|
return IPPROTO_ESP;
|
|
case SADB_X_SATYPE_IPCOMP:
|
|
return IPPROTO_COMP;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
static uint8_t
|
|
pfkey_proto2satype(uint16_t proto)
|
|
{
|
|
switch (proto) {
|
|
case IPPROTO_AH:
|
|
return SADB_SATYPE_AH;
|
|
case IPPROTO_ESP:
|
|
return SADB_SATYPE_ESP;
|
|
case IPPROTO_COMP:
|
|
return SADB_X_SATYPE_IPCOMP;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
/* BTW, this scheme means that there is no way with PFKEY2 sockets to
|
|
* say specifically 'just raw sockets' as we encode them as 255.
|
|
*/
|
|
|
|
static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
|
|
{
|
|
return proto == IPSEC_PROTO_ANY ? 0 : proto;
|
|
}
|
|
|
|
static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
|
|
{
|
|
return proto ? proto : IPSEC_PROTO_ANY;
|
|
}
|
|
|
|
static inline int pfkey_sockaddr_len(sa_family_t family)
|
|
{
|
|
switch (family) {
|
|
case AF_INET:
|
|
return sizeof(struct sockaddr_in);
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
case AF_INET6:
|
|
return sizeof(struct sockaddr_in6);
|
|
#endif
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static
|
|
int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
|
|
{
|
|
switch (sa->sa_family) {
|
|
case AF_INET:
|
|
xaddr->a4 =
|
|
((struct sockaddr_in *)sa)->sin_addr.s_addr;
|
|
return AF_INET;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
case AF_INET6:
|
|
memcpy(xaddr->a6,
|
|
&((struct sockaddr_in6 *)sa)->sin6_addr,
|
|
sizeof(struct in6_addr));
|
|
return AF_INET6;
|
|
#endif
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static
|
|
int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr)
|
|
{
|
|
return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
|
|
xaddr);
|
|
}
|
|
|
|
static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs)
|
|
{
|
|
const struct sadb_sa *sa;
|
|
const struct sadb_address *addr;
|
|
uint16_t proto;
|
|
unsigned short family;
|
|
xfrm_address_t *xaddr;
|
|
|
|
sa = ext_hdrs[SADB_EXT_SA - 1];
|
|
if (sa == NULL)
|
|
return NULL;
|
|
|
|
proto = pfkey_satype2proto(hdr->sadb_msg_satype);
|
|
if (proto == 0)
|
|
return NULL;
|
|
|
|
/* sadb_address_len should be checked by caller */
|
|
addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1];
|
|
if (addr == NULL)
|
|
return NULL;
|
|
|
|
family = ((const struct sockaddr *)(addr + 1))->sa_family;
|
|
switch (family) {
|
|
case AF_INET:
|
|
xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr;
|
|
break;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
case AF_INET6:
|
|
xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr;
|
|
break;
|
|
#endif
|
|
default:
|
|
xaddr = NULL;
|
|
}
|
|
|
|
if (!xaddr)
|
|
return NULL;
|
|
|
|
return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family);
|
|
}
|
|
|
|
#define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
|
|
|
|
static int
|
|
pfkey_sockaddr_size(sa_family_t family)
|
|
{
|
|
return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
|
|
}
|
|
|
|
static inline int pfkey_mode_from_xfrm(int mode)
|
|
{
|
|
switch(mode) {
|
|
case XFRM_MODE_TRANSPORT:
|
|
return IPSEC_MODE_TRANSPORT;
|
|
case XFRM_MODE_TUNNEL:
|
|
return IPSEC_MODE_TUNNEL;
|
|
case XFRM_MODE_BEET:
|
|
return IPSEC_MODE_BEET;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static inline int pfkey_mode_to_xfrm(int mode)
|
|
{
|
|
switch(mode) {
|
|
case IPSEC_MODE_ANY: /*XXX*/
|
|
case IPSEC_MODE_TRANSPORT:
|
|
return XFRM_MODE_TRANSPORT;
|
|
case IPSEC_MODE_TUNNEL:
|
|
return XFRM_MODE_TUNNEL;
|
|
case IPSEC_MODE_BEET:
|
|
return XFRM_MODE_BEET;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port,
|
|
struct sockaddr *sa,
|
|
unsigned short family)
|
|
{
|
|
switch (family) {
|
|
case AF_INET:
|
|
{
|
|
struct sockaddr_in *sin = (struct sockaddr_in *)sa;
|
|
sin->sin_family = AF_INET;
|
|
sin->sin_port = port;
|
|
sin->sin_addr.s_addr = xaddr->a4;
|
|
memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
|
|
return 32;
|
|
}
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
case AF_INET6:
|
|
{
|
|
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
|
|
sin6->sin6_family = AF_INET6;
|
|
sin6->sin6_port = port;
|
|
sin6->sin6_flowinfo = 0;
|
|
sin6->sin6_addr = *(struct in6_addr *)xaddr->a6;
|
|
sin6->sin6_scope_id = 0;
|
|
return 128;
|
|
}
|
|
#endif
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
|
|
int add_keys, int hsc)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct sadb_msg *hdr;
|
|
struct sadb_sa *sa;
|
|
struct sadb_lifetime *lifetime;
|
|
struct sadb_address *addr;
|
|
struct sadb_key *key;
|
|
struct sadb_x_sa2 *sa2;
|
|
struct sadb_x_sec_ctx *sec_ctx;
|
|
struct xfrm_sec_ctx *xfrm_ctx;
|
|
int ctx_size = 0;
|
|
int size;
|
|
int auth_key_size = 0;
|
|
int encrypt_key_size = 0;
|
|
int sockaddr_size;
|
|
struct xfrm_encap_tmpl *natt = NULL;
|
|
int mode;
|
|
|
|
/* address family check */
|
|
sockaddr_size = pfkey_sockaddr_size(x->props.family);
|
|
if (!sockaddr_size)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
/* base, SA, (lifetime (HSC),) address(SD), (address(P),)
|
|
key(AE), (identity(SD),) (sensitivity)> */
|
|
size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
|
|
sizeof(struct sadb_lifetime) +
|
|
((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
|
|
((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
|
|
sizeof(struct sadb_address)*2 +
|
|
sockaddr_size*2 +
|
|
sizeof(struct sadb_x_sa2);
|
|
|
|
if ((xfrm_ctx = x->security)) {
|
|
ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
|
|
size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
|
|
}
|
|
|
|
/* identity & sensitivity */
|
|
if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, x->props.family))
|
|
size += sizeof(struct sadb_address) + sockaddr_size;
|
|
|
|
if (add_keys) {
|
|
if (x->aalg && x->aalg->alg_key_len) {
|
|
auth_key_size =
|
|
PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
|
|
size += sizeof(struct sadb_key) + auth_key_size;
|
|
}
|
|
if (x->ealg && x->ealg->alg_key_len) {
|
|
encrypt_key_size =
|
|
PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
|
|
size += sizeof(struct sadb_key) + encrypt_key_size;
|
|
}
|
|
}
|
|
if (x->encap)
|
|
natt = x->encap;
|
|
|
|
if (natt && natt->encap_type) {
|
|
size += sizeof(struct sadb_x_nat_t_type);
|
|
size += sizeof(struct sadb_x_nat_t_port);
|
|
size += sizeof(struct sadb_x_nat_t_port);
|
|
}
|
|
|
|
skb = alloc_skb(size + 16, GFP_ATOMIC);
|
|
if (skb == NULL)
|
|
return ERR_PTR(-ENOBUFS);
|
|
|
|
/* call should fill header later */
|
|
hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
|
|
memset(hdr, 0, size); /* XXX do we need this ? */
|
|
hdr->sadb_msg_len = size / sizeof(uint64_t);
|
|
|
|
/* sa */
|
|
sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
|
|
sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
|
|
sa->sadb_sa_exttype = SADB_EXT_SA;
|
|
sa->sadb_sa_spi = x->id.spi;
|
|
sa->sadb_sa_replay = x->props.replay_window;
|
|
switch (x->km.state) {
|
|
case XFRM_STATE_VALID:
|
|
sa->sadb_sa_state = x->km.dying ?
|
|
SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
|
|
break;
|
|
case XFRM_STATE_ACQ:
|
|
sa->sadb_sa_state = SADB_SASTATE_LARVAL;
|
|
break;
|
|
default:
|
|
sa->sadb_sa_state = SADB_SASTATE_DEAD;
|
|
break;
|
|
}
|
|
sa->sadb_sa_auth = 0;
|
|
if (x->aalg) {
|
|
struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
|
|
sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
|
|
}
|
|
sa->sadb_sa_encrypt = 0;
|
|
BUG_ON(x->ealg && x->calg);
|
|
if (x->ealg) {
|
|
struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
|
|
sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
|
|
}
|
|
/* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
|
|
if (x->calg) {
|
|
struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
|
|
sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
|
|
}
|
|
|
|
sa->sadb_sa_flags = 0;
|
|
if (x->props.flags & XFRM_STATE_NOECN)
|
|
sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
|
|
if (x->props.flags & XFRM_STATE_DECAP_DSCP)
|
|
sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
|
|
if (x->props.flags & XFRM_STATE_NOPMTUDISC)
|
|
sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
|
|
|
|
/* hard time */
|
|
if (hsc & 2) {
|
|
lifetime = (struct sadb_lifetime *) skb_put(skb,
|
|
sizeof(struct sadb_lifetime));
|
|
lifetime->sadb_lifetime_len =
|
|
sizeof(struct sadb_lifetime)/sizeof(uint64_t);
|
|
lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
|
|
lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.hard_packet_limit);
|
|
lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
|
|
lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
|
|
lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
|
|
}
|
|
/* soft time */
|
|
if (hsc & 1) {
|
|
lifetime = (struct sadb_lifetime *) skb_put(skb,
|
|
sizeof(struct sadb_lifetime));
|
|
lifetime->sadb_lifetime_len =
|
|
sizeof(struct sadb_lifetime)/sizeof(uint64_t);
|
|
lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
|
|
lifetime->sadb_lifetime_allocations = _X2KEY(x->lft.soft_packet_limit);
|
|
lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
|
|
lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
|
|
lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
|
|
}
|
|
/* current time */
|
|
lifetime = (struct sadb_lifetime *) skb_put(skb,
|
|
sizeof(struct sadb_lifetime));
|
|
lifetime->sadb_lifetime_len =
|
|
sizeof(struct sadb_lifetime)/sizeof(uint64_t);
|
|
lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
|
|
lifetime->sadb_lifetime_allocations = x->curlft.packets;
|
|
lifetime->sadb_lifetime_bytes = x->curlft.bytes;
|
|
lifetime->sadb_lifetime_addtime = x->curlft.add_time;
|
|
lifetime->sadb_lifetime_usetime = x->curlft.use_time;
|
|
/* src address */
|
|
addr = (struct sadb_address*) skb_put(skb,
|
|
sizeof(struct sadb_address)+sockaddr_size);
|
|
addr->sadb_address_len =
|
|
(sizeof(struct sadb_address)+sockaddr_size)/
|
|
sizeof(uint64_t);
|
|
addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
|
|
/* "if the ports are non-zero, then the sadb_address_proto field,
|
|
normally zero, MUST be filled in with the transport
|
|
protocol's number." - RFC2367 */
|
|
addr->sadb_address_proto = 0;
|
|
addr->sadb_address_reserved = 0;
|
|
|
|
addr->sadb_address_prefixlen =
|
|
pfkey_sockaddr_fill(&x->props.saddr, 0,
|
|
(struct sockaddr *) (addr + 1),
|
|
x->props.family);
|
|
if (!addr->sadb_address_prefixlen)
|
|
BUG();
|
|
|
|
/* dst address */
|
|
addr = (struct sadb_address*) skb_put(skb,
|
|
sizeof(struct sadb_address)+sockaddr_size);
|
|
addr->sadb_address_len =
|
|
(sizeof(struct sadb_address)+sockaddr_size)/
|
|
sizeof(uint64_t);
|
|
addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
|
|
addr->sadb_address_proto = 0;
|
|
addr->sadb_address_reserved = 0;
|
|
|
|
addr->sadb_address_prefixlen =
|
|
pfkey_sockaddr_fill(&x->id.daddr, 0,
|
|
(struct sockaddr *) (addr + 1),
|
|
x->props.family);
|
|
if (!addr->sadb_address_prefixlen)
|
|
BUG();
|
|
|
|
if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr,
|
|
x->props.family)) {
|
|
addr = (struct sadb_address*) skb_put(skb,
|
|
sizeof(struct sadb_address)+sockaddr_size);
|
|
addr->sadb_address_len =
|
|
(sizeof(struct sadb_address)+sockaddr_size)/
|
|
sizeof(uint64_t);
|
|
addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
|
|
addr->sadb_address_proto =
|
|
pfkey_proto_from_xfrm(x->sel.proto);
|
|
addr->sadb_address_prefixlen = x->sel.prefixlen_s;
|
|
addr->sadb_address_reserved = 0;
|
|
|
|
pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
|
|
(struct sockaddr *) (addr + 1),
|
|
x->props.family);
|
|
}
|
|
|
|
/* auth key */
|
|
if (add_keys && auth_key_size) {
|
|
key = (struct sadb_key *) skb_put(skb,
|
|
sizeof(struct sadb_key)+auth_key_size);
|
|
key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
|
|
sizeof(uint64_t);
|
|
key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
|
|
key->sadb_key_bits = x->aalg->alg_key_len;
|
|
key->sadb_key_reserved = 0;
|
|
memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
|
|
}
|
|
/* encrypt key */
|
|
if (add_keys && encrypt_key_size) {
|
|
key = (struct sadb_key *) skb_put(skb,
|
|
sizeof(struct sadb_key)+encrypt_key_size);
|
|
key->sadb_key_len = (sizeof(struct sadb_key) +
|
|
encrypt_key_size) / sizeof(uint64_t);
|
|
key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
|
|
key->sadb_key_bits = x->ealg->alg_key_len;
|
|
key->sadb_key_reserved = 0;
|
|
memcpy(key + 1, x->ealg->alg_key,
|
|
(x->ealg->alg_key_len+7)/8);
|
|
}
|
|
|
|
/* sa */
|
|
sa2 = (struct sadb_x_sa2 *) skb_put(skb, sizeof(struct sadb_x_sa2));
|
|
sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
|
|
sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
|
|
if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
|
|
kfree_skb(skb);
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
sa2->sadb_x_sa2_mode = mode;
|
|
sa2->sadb_x_sa2_reserved1 = 0;
|
|
sa2->sadb_x_sa2_reserved2 = 0;
|
|
sa2->sadb_x_sa2_sequence = 0;
|
|
sa2->sadb_x_sa2_reqid = x->props.reqid;
|
|
|
|
if (natt && natt->encap_type) {
|
|
struct sadb_x_nat_t_type *n_type;
|
|
struct sadb_x_nat_t_port *n_port;
|
|
|
|
/* type */
|
|
n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
|
|
n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
|
|
n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
|
|
n_type->sadb_x_nat_t_type_type = natt->encap_type;
|
|
n_type->sadb_x_nat_t_type_reserved[0] = 0;
|
|
n_type->sadb_x_nat_t_type_reserved[1] = 0;
|
|
n_type->sadb_x_nat_t_type_reserved[2] = 0;
|
|
|
|
/* source port */
|
|
n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
|
|
n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
|
|
n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
|
|
n_port->sadb_x_nat_t_port_port = natt->encap_sport;
|
|
n_port->sadb_x_nat_t_port_reserved = 0;
|
|
|
|
/* dest port */
|
|
n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
|
|
n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
|
|
n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
|
|
n_port->sadb_x_nat_t_port_port = natt->encap_dport;
|
|
n_port->sadb_x_nat_t_port_reserved = 0;
|
|
}
|
|
|
|
/* security context */
|
|
if (xfrm_ctx) {
|
|
sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
|
|
sizeof(struct sadb_x_sec_ctx) + ctx_size);
|
|
sec_ctx->sadb_x_sec_len =
|
|
(sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
|
|
sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
|
|
sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
|
|
sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
|
|
sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
|
|
memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
|
|
xfrm_ctx->ctx_len);
|
|
}
|
|
|
|
return skb;
|
|
}
|
|
|
|
|
|
static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
skb = __pfkey_xfrm_state2msg(x, 1, 3);
|
|
|
|
return skb;
|
|
}
|
|
|
|
static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x,
|
|
int hsc)
|
|
{
|
|
return __pfkey_xfrm_state2msg(x, 0, hsc);
|
|
}
|
|
|
|
static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
|
|
const struct sadb_msg *hdr,
|
|
void * const *ext_hdrs)
|
|
{
|
|
struct xfrm_state *x;
|
|
const struct sadb_lifetime *lifetime;
|
|
const struct sadb_sa *sa;
|
|
const struct sadb_key *key;
|
|
const struct sadb_x_sec_ctx *sec_ctx;
|
|
uint16_t proto;
|
|
int err;
|
|
|
|
|
|
sa = ext_hdrs[SADB_EXT_SA - 1];
|
|
if (!sa ||
|
|
!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
|
|
ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
|
|
return ERR_PTR(-EINVAL);
|
|
if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
|
|
!ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
|
|
return ERR_PTR(-EINVAL);
|
|
if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
|
|
!ext_hdrs[SADB_EXT_KEY_AUTH-1])
|
|
return ERR_PTR(-EINVAL);
|
|
if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
|
|
!!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
proto = pfkey_satype2proto(hdr->sadb_msg_satype);
|
|
if (proto == 0)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
/* default error is no buffer space */
|
|
err = -ENOBUFS;
|
|
|
|
/* RFC2367:
|
|
|
|
Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
|
|
SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
|
|
sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
|
|
Therefore, the sadb_sa_state field of all submitted SAs MUST be
|
|
SADB_SASTATE_MATURE and the kernel MUST return an error if this is
|
|
not true.
|
|
|
|
However, KAME setkey always uses SADB_SASTATE_LARVAL.
|
|
Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
|
|
*/
|
|
if (sa->sadb_sa_auth > SADB_AALG_MAX ||
|
|
(hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
|
|
sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
|
|
sa->sadb_sa_encrypt > SADB_EALG_MAX)
|
|
return ERR_PTR(-EINVAL);
|
|
key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
|
|
if (key != NULL &&
|
|
sa->sadb_sa_auth != SADB_X_AALG_NULL &&
|
|
((key->sadb_key_bits+7) / 8 == 0 ||
|
|
(key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
|
|
return ERR_PTR(-EINVAL);
|
|
key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
|
|
if (key != NULL &&
|
|
sa->sadb_sa_encrypt != SADB_EALG_NULL &&
|
|
((key->sadb_key_bits+7) / 8 == 0 ||
|
|
(key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
x = xfrm_state_alloc(net);
|
|
if (x == NULL)
|
|
return ERR_PTR(-ENOBUFS);
|
|
|
|
x->id.proto = proto;
|
|
x->id.spi = sa->sadb_sa_spi;
|
|
x->props.replay_window = sa->sadb_sa_replay;
|
|
if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
|
|
x->props.flags |= XFRM_STATE_NOECN;
|
|
if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
|
|
x->props.flags |= XFRM_STATE_DECAP_DSCP;
|
|
if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
|
|
x->props.flags |= XFRM_STATE_NOPMTUDISC;
|
|
|
|
lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1];
|
|
if (lifetime != NULL) {
|
|
x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
|
|
x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
|
|
x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
|
|
x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
|
|
}
|
|
lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1];
|
|
if (lifetime != NULL) {
|
|
x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
|
|
x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
|
|
x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
|
|
x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
|
|
}
|
|
|
|
sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
|
|
if (sec_ctx != NULL) {
|
|
struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
|
|
|
|
if (!uctx)
|
|
goto out;
|
|
|
|
err = security_xfrm_state_alloc(x, uctx);
|
|
kfree(uctx);
|
|
|
|
if (err)
|
|
goto out;
|
|
}
|
|
|
|
key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
|
|
if (sa->sadb_sa_auth) {
|
|
int keysize = 0;
|
|
struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
|
|
if (!a) {
|
|
err = -ENOSYS;
|
|
goto out;
|
|
}
|
|
if (key)
|
|
keysize = (key->sadb_key_bits + 7) / 8;
|
|
x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
|
|
if (!x->aalg)
|
|
goto out;
|
|
strcpy(x->aalg->alg_name, a->name);
|
|
x->aalg->alg_key_len = 0;
|
|
if (key) {
|
|
x->aalg->alg_key_len = key->sadb_key_bits;
|
|
memcpy(x->aalg->alg_key, key+1, keysize);
|
|
}
|
|
x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
|
|
x->props.aalgo = sa->sadb_sa_auth;
|
|
/* x->algo.flags = sa->sadb_sa_flags; */
|
|
}
|
|
if (sa->sadb_sa_encrypt) {
|
|
if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
|
|
struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
|
|
if (!a) {
|
|
err = -ENOSYS;
|
|
goto out;
|
|
}
|
|
x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
|
|
if (!x->calg)
|
|
goto out;
|
|
strcpy(x->calg->alg_name, a->name);
|
|
x->props.calgo = sa->sadb_sa_encrypt;
|
|
} else {
|
|
int keysize = 0;
|
|
struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
|
|
if (!a) {
|
|
err = -ENOSYS;
|
|
goto out;
|
|
}
|
|
key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
|
|
if (key)
|
|
keysize = (key->sadb_key_bits + 7) / 8;
|
|
x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
|
|
if (!x->ealg)
|
|
goto out;
|
|
strcpy(x->ealg->alg_name, a->name);
|
|
x->ealg->alg_key_len = 0;
|
|
if (key) {
|
|
x->ealg->alg_key_len = key->sadb_key_bits;
|
|
memcpy(x->ealg->alg_key, key+1, keysize);
|
|
}
|
|
x->props.ealgo = sa->sadb_sa_encrypt;
|
|
}
|
|
}
|
|
/* x->algo.flags = sa->sadb_sa_flags; */
|
|
|
|
x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
|
|
&x->props.saddr);
|
|
if (!x->props.family) {
|
|
err = -EAFNOSUPPORT;
|
|
goto out;
|
|
}
|
|
pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
|
|
&x->id.daddr);
|
|
|
|
if (ext_hdrs[SADB_X_EXT_SA2-1]) {
|
|
const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
|
|
int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
|
|
if (mode < 0) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
x->props.mode = mode;
|
|
x->props.reqid = sa2->sadb_x_sa2_reqid;
|
|
}
|
|
|
|
if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
|
|
const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
|
|
|
|
/* Nobody uses this, but we try. */
|
|
x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
|
|
x->sel.prefixlen_s = addr->sadb_address_prefixlen;
|
|
}
|
|
|
|
if (!x->sel.family)
|
|
x->sel.family = x->props.family;
|
|
|
|
if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
|
|
const struct sadb_x_nat_t_type* n_type;
|
|
struct xfrm_encap_tmpl *natt;
|
|
|
|
x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
|
|
if (!x->encap)
|
|
goto out;
|
|
|
|
natt = x->encap;
|
|
n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
|
|
natt->encap_type = n_type->sadb_x_nat_t_type_type;
|
|
|
|
if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
|
|
const struct sadb_x_nat_t_port *n_port =
|
|
ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
|
|
natt->encap_sport = n_port->sadb_x_nat_t_port_port;
|
|
}
|
|
if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
|
|
const struct sadb_x_nat_t_port *n_port =
|
|
ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
|
|
natt->encap_dport = n_port->sadb_x_nat_t_port_port;
|
|
}
|
|
memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
|
|
}
|
|
|
|
err = xfrm_init_state(x);
|
|
if (err)
|
|
goto out;
|
|
|
|
x->km.seq = hdr->sadb_msg_seq;
|
|
return x;
|
|
|
|
out:
|
|
x->km.state = XFRM_STATE_DEAD;
|
|
xfrm_state_put(x);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
|
|
{
|
|
struct net *net = sock_net(sk);
|
|
struct sk_buff *resp_skb;
|
|
struct sadb_x_sa2 *sa2;
|
|
struct sadb_address *saddr, *daddr;
|
|
struct sadb_msg *out_hdr;
|
|
struct sadb_spirange *range;
|
|
struct xfrm_state *x = NULL;
|
|
int mode;
|
|
int err;
|
|
u32 min_spi, max_spi;
|
|
u32 reqid;
|
|
u8 proto;
|
|
unsigned short family;
|
|
xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
|
|
|
|
if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
|
|
ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
|
|
return -EINVAL;
|
|
|
|
proto = pfkey_satype2proto(hdr->sadb_msg_satype);
|
|
if (proto == 0)
|
|
return -EINVAL;
|
|
|
|
if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
|
|
mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
|
|
if (mode < 0)
|
|
return -EINVAL;
|
|
reqid = sa2->sadb_x_sa2_reqid;
|
|
} else {
|
|
mode = 0;
|
|
reqid = 0;
|
|
}
|
|
|
|
saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
|
|
daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
|
|
|
|
family = ((struct sockaddr *)(saddr + 1))->sa_family;
|
|
switch (family) {
|
|
case AF_INET:
|
|
xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
|
|
xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
|
|
break;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
case AF_INET6:
|
|
xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
|
|
xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
|
|
break;
|
|
#endif
|
|
}
|
|
|
|
if (hdr->sadb_msg_seq) {
|
|
x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
|
|
if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
|
|
xfrm_state_put(x);
|
|
x = NULL;
|
|
}
|
|
}
|
|
|
|
if (!x)
|
|
x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family);
|
|
|
|
if (x == NULL)
|
|
return -ENOENT;
|
|
|
|
min_spi = 0x100;
|
|
max_spi = 0x0fffffff;
|
|
|
|
range = ext_hdrs[SADB_EXT_SPIRANGE-1];
|
|
if (range) {
|
|
min_spi = range->sadb_spirange_min;
|
|
max_spi = range->sadb_spirange_max;
|
|
}
|
|
|
|
err = xfrm_alloc_spi(x, min_spi, max_spi);
|
|
resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
|
|
|
|
if (IS_ERR(resp_skb)) {
|
|
xfrm_state_put(x);
|
|
return PTR_ERR(resp_skb);
|
|
}
|
|
|
|
out_hdr = (struct sadb_msg *) resp_skb->data;
|
|
out_hdr->sadb_msg_version = hdr->sadb_msg_version;
|
|
out_hdr->sadb_msg_type = SADB_GETSPI;
|
|
out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
|
|
out_hdr->sadb_msg_errno = 0;
|
|
out_hdr->sadb_msg_reserved = 0;
|
|
out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
|
|
out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
|
|
|
|
xfrm_state_put(x);
|
|
|
|
pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
|
|
{
|
|
struct net *net = sock_net(sk);
|
|
struct xfrm_state *x;
|
|
|
|
if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
|
|
return 0;
|
|
|
|
x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
|
|
if (x == NULL)
|
|
return 0;
|
|
|
|
spin_lock_bh(&x->lock);
|
|
if (x->km.state == XFRM_STATE_ACQ) {
|
|
x->km.state = XFRM_STATE_ERROR;
|
|
wake_up(&net->xfrm.km_waitq);
|
|
}
|
|
spin_unlock_bh(&x->lock);
|
|
xfrm_state_put(x);
|
|
return 0;
|
|
}
|
|
|
|
static inline int event2poltype(int event)
|
|
{
|
|
switch (event) {
|
|
case XFRM_MSG_DELPOLICY:
|
|
return SADB_X_SPDDELETE;
|
|
case XFRM_MSG_NEWPOLICY:
|
|
return SADB_X_SPDADD;
|
|
case XFRM_MSG_UPDPOLICY:
|
|
return SADB_X_SPDUPDATE;
|
|
case XFRM_MSG_POLEXPIRE:
|
|
// return SADB_X_SPDEXPIRE;
|
|
default:
|
|
pr_err("pfkey: Unknown policy event %d\n", event);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int event2keytype(int event)
|
|
{
|
|
switch (event) {
|
|
case XFRM_MSG_DELSA:
|
|
return SADB_DELETE;
|
|
case XFRM_MSG_NEWSA:
|
|
return SADB_ADD;
|
|
case XFRM_MSG_UPDSA:
|
|
return SADB_UPDATE;
|
|
case XFRM_MSG_EXPIRE:
|
|
return SADB_EXPIRE;
|
|
default:
|
|
pr_err("pfkey: Unknown SA event %d\n", event);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* ADD/UPD/DEL */
|
|
static int key_notify_sa(struct xfrm_state *x, const struct km_event *c)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct sadb_msg *hdr;
|
|
|
|
skb = pfkey_xfrm_state2msg(x);
|
|
|
|
if (IS_ERR(skb))
|
|
return PTR_ERR(skb);
|
|
|
|
hdr = (struct sadb_msg *) skb->data;
|
|
hdr->sadb_msg_version = PF_KEY_V2;
|
|
hdr->sadb_msg_type = event2keytype(c->event);
|
|
hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
|
|
hdr->sadb_msg_errno = 0;
|
|
hdr->sadb_msg_reserved = 0;
|
|
hdr->sadb_msg_seq = c->seq;
|
|
hdr->sadb_msg_pid = c->portid;
|
|
|
|
pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
|
|
{
|
|
struct net *net = sock_net(sk);
|
|
struct xfrm_state *x;
|
|
int err;
|
|
struct km_event c;
|
|
|
|
x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
|
|
if (IS_ERR(x))
|
|
return PTR_ERR(x);
|
|
|
|
xfrm_state_hold(x);
|
|
if (hdr->sadb_msg_type == SADB_ADD)
|
|
err = xfrm_state_add(x);
|
|
else
|
|
err = xfrm_state_update(x);
|
|
|
|
xfrm_audit_state_add(x, err ? 0 : 1,
|
|
audit_get_loginuid(current),
|
|
audit_get_sessionid(current), 0);
|
|
|
|
if (err < 0) {
|
|
x->km.state = XFRM_STATE_DEAD;
|
|
__xfrm_state_put(x);
|
|
goto out;
|
|
}
|
|
|
|
if (hdr->sadb_msg_type == SADB_ADD)
|
|
c.event = XFRM_MSG_NEWSA;
|
|
else
|
|
c.event = XFRM_MSG_UPDSA;
|
|
c.seq = hdr->sadb_msg_seq;
|
|
c.portid = hdr->sadb_msg_pid;
|
|
km_state_notify(x, &c);
|
|
out:
|
|
xfrm_state_put(x);
|
|
return err;
|
|
}
|
|
|
|
static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
|
|
{
|
|
struct net *net = sock_net(sk);
|
|
struct xfrm_state *x;
|
|
struct km_event c;
|
|
int err;
|
|
|
|
if (!ext_hdrs[SADB_EXT_SA-1] ||
|
|
!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
|
|
ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
|
|
return -EINVAL;
|
|
|
|
x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
|
|
if (x == NULL)
|
|
return -ESRCH;
|
|
|
|
if ((err = security_xfrm_state_delete(x)))
|
|
goto out;
|
|
|
|
if (xfrm_state_kern(x)) {
|
|
err = -EPERM;
|
|
goto out;
|
|
}
|
|
|
|
err = xfrm_state_delete(x);
|
|
|
|
if (err < 0)
|
|
goto out;
|
|
|
|
c.seq = hdr->sadb_msg_seq;
|
|
c.portid = hdr->sadb_msg_pid;
|
|
c.event = XFRM_MSG_DELSA;
|
|
km_state_notify(x, &c);
|
|
out:
|
|
xfrm_audit_state_delete(x, err ? 0 : 1,
|
|
audit_get_loginuid(current),
|
|
audit_get_sessionid(current), 0);
|
|
xfrm_state_put(x);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
|
|
{
|
|
struct net *net = sock_net(sk);
|
|
__u8 proto;
|
|
struct sk_buff *out_skb;
|
|
struct sadb_msg *out_hdr;
|
|
struct xfrm_state *x;
|
|
|
|
if (!ext_hdrs[SADB_EXT_SA-1] ||
|
|
!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
|
|
ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
|
|
return -EINVAL;
|
|
|
|
x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
|
|
if (x == NULL)
|
|
return -ESRCH;
|
|
|
|
out_skb = pfkey_xfrm_state2msg(x);
|
|
proto = x->id.proto;
|
|
xfrm_state_put(x);
|
|
if (IS_ERR(out_skb))
|
|
return PTR_ERR(out_skb);
|
|
|
|
out_hdr = (struct sadb_msg *) out_skb->data;
|
|
out_hdr->sadb_msg_version = hdr->sadb_msg_version;
|
|
out_hdr->sadb_msg_type = SADB_GET;
|
|
out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
|
|
out_hdr->sadb_msg_errno = 0;
|
|
out_hdr->sadb_msg_reserved = 0;
|
|
out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
|
|
out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
|
|
pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig,
|
|
gfp_t allocation)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct sadb_msg *hdr;
|
|
int len, auth_len, enc_len, i;
|
|
|
|
auth_len = xfrm_count_auth_supported();
|
|
if (auth_len) {
|
|
auth_len *= sizeof(struct sadb_alg);
|
|
auth_len += sizeof(struct sadb_supported);
|
|
}
|
|
|
|
enc_len = xfrm_count_enc_supported();
|
|
if (enc_len) {
|
|
enc_len *= sizeof(struct sadb_alg);
|
|
enc_len += sizeof(struct sadb_supported);
|
|
}
|
|
|
|
len = enc_len + auth_len + sizeof(struct sadb_msg);
|
|
|
|
skb = alloc_skb(len + 16, allocation);
|
|
if (!skb)
|
|
goto out_put_algs;
|
|
|
|
hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
|
|
pfkey_hdr_dup(hdr, orig);
|
|
hdr->sadb_msg_errno = 0;
|
|
hdr->sadb_msg_len = len / sizeof(uint64_t);
|
|
|
|
if (auth_len) {
|
|
struct sadb_supported *sp;
|
|
struct sadb_alg *ap;
|
|
|
|
sp = (struct sadb_supported *) skb_put(skb, auth_len);
|
|
ap = (struct sadb_alg *) (sp + 1);
|
|
|
|
sp->sadb_supported_len = auth_len / sizeof(uint64_t);
|
|
sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
|
|
|
|
for (i = 0; ; i++) {
|
|
struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
|
|
if (!aalg)
|
|
break;
|
|
if (aalg->available)
|
|
*ap++ = aalg->desc;
|
|
}
|
|
}
|
|
|
|
if (enc_len) {
|
|
struct sadb_supported *sp;
|
|
struct sadb_alg *ap;
|
|
|
|
sp = (struct sadb_supported *) skb_put(skb, enc_len);
|
|
ap = (struct sadb_alg *) (sp + 1);
|
|
|
|
sp->sadb_supported_len = enc_len / sizeof(uint64_t);
|
|
sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
|
|
|
|
for (i = 0; ; i++) {
|
|
struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
|
|
if (!ealg)
|
|
break;
|
|
if (ealg->available)
|
|
*ap++ = ealg->desc;
|
|
}
|
|
}
|
|
|
|
out_put_algs:
|
|
return skb;
|
|
}
|
|
|
|
static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
|
|
{
|
|
struct pfkey_sock *pfk = pfkey_sk(sk);
|
|
struct sk_buff *supp_skb;
|
|
|
|
if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
|
|
return -EINVAL;
|
|
|
|
if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
|
|
if (pfk->registered&(1<<hdr->sadb_msg_satype))
|
|
return -EEXIST;
|
|
pfk->registered |= (1<<hdr->sadb_msg_satype);
|
|
}
|
|
|
|
xfrm_probe_algs();
|
|
|
|
supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
|
|
if (!supp_skb) {
|
|
if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
|
|
pfk->registered &= ~(1<<hdr->sadb_msg_satype);
|
|
|
|
return -ENOBUFS;
|
|
}
|
|
|
|
pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, sock_net(sk));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct sadb_msg *hdr;
|
|
|
|
skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
|
|
if (!skb)
|
|
return -ENOBUFS;
|
|
|
|
hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
|
|
memcpy(hdr, ihdr, sizeof(struct sadb_msg));
|
|
hdr->sadb_msg_errno = (uint8_t) 0;
|
|
hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
|
|
|
|
return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
|
|
}
|
|
|
|
static int key_notify_sa_flush(const struct km_event *c)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct sadb_msg *hdr;
|
|
|
|
skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
|
|
if (!skb)
|
|
return -ENOBUFS;
|
|
hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
|
|
hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
|
|
hdr->sadb_msg_type = SADB_FLUSH;
|
|
hdr->sadb_msg_seq = c->seq;
|
|
hdr->sadb_msg_pid = c->portid;
|
|
hdr->sadb_msg_version = PF_KEY_V2;
|
|
hdr->sadb_msg_errno = (uint8_t) 0;
|
|
hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
|
|
|
|
pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
|
|
{
|
|
struct net *net = sock_net(sk);
|
|
unsigned int proto;
|
|
struct km_event c;
|
|
struct xfrm_audit audit_info;
|
|
int err, err2;
|
|
|
|
proto = pfkey_satype2proto(hdr->sadb_msg_satype);
|
|
if (proto == 0)
|
|
return -EINVAL;
|
|
|
|
audit_info.loginuid = audit_get_loginuid(current);
|
|
audit_info.sessionid = audit_get_sessionid(current);
|
|
audit_info.secid = 0;
|
|
err = xfrm_state_flush(net, proto, &audit_info);
|
|
err2 = unicast_flush_resp(sk, hdr);
|
|
if (err || err2) {
|
|
if (err == -ESRCH) /* empty table - go quietly */
|
|
err = 0;
|
|
return err ? err : err2;
|
|
}
|
|
|
|
c.data.proto = proto;
|
|
c.seq = hdr->sadb_msg_seq;
|
|
c.portid = hdr->sadb_msg_pid;
|
|
c.event = XFRM_MSG_FLUSHSA;
|
|
c.net = net;
|
|
km_state_notify(NULL, &c);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dump_sa(struct xfrm_state *x, int count, void *ptr)
|
|
{
|
|
struct pfkey_sock *pfk = ptr;
|
|
struct sk_buff *out_skb;
|
|
struct sadb_msg *out_hdr;
|
|
|
|
if (!pfkey_can_dump(&pfk->sk))
|
|
return -ENOBUFS;
|
|
|
|
out_skb = pfkey_xfrm_state2msg(x);
|
|
if (IS_ERR(out_skb))
|
|
return PTR_ERR(out_skb);
|
|
|
|
out_hdr = (struct sadb_msg *) out_skb->data;
|
|
out_hdr->sadb_msg_version = pfk->dump.msg_version;
|
|
out_hdr->sadb_msg_type = SADB_DUMP;
|
|
out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
|
|
out_hdr->sadb_msg_errno = 0;
|
|
out_hdr->sadb_msg_reserved = 0;
|
|
out_hdr->sadb_msg_seq = count + 1;
|
|
out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
|
|
|
|
if (pfk->dump.skb)
|
|
pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
|
|
&pfk->sk, sock_net(&pfk->sk));
|
|
pfk->dump.skb = out_skb;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pfkey_dump_sa(struct pfkey_sock *pfk)
|
|
{
|
|
struct net *net = sock_net(&pfk->sk);
|
|
return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
|
|
}
|
|
|
|
static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
|
|
{
|
|
xfrm_state_walk_done(&pfk->dump.u.state);
|
|
}
|
|
|
|
static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
|
|
{
|
|
u8 proto;
|
|
struct pfkey_sock *pfk = pfkey_sk(sk);
|
|
|
|
if (pfk->dump.dump != NULL)
|
|
return -EBUSY;
|
|
|
|
proto = pfkey_satype2proto(hdr->sadb_msg_satype);
|
|
if (proto == 0)
|
|
return -EINVAL;
|
|
|
|
pfk->dump.msg_version = hdr->sadb_msg_version;
|
|
pfk->dump.msg_portid = hdr->sadb_msg_pid;
|
|
pfk->dump.dump = pfkey_dump_sa;
|
|
pfk->dump.done = pfkey_dump_sa_done;
|
|
xfrm_state_walk_init(&pfk->dump.u.state, proto);
|
|
|
|
return pfkey_do_dump(pfk);
|
|
}
|
|
|
|
static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
|
|
{
|
|
struct pfkey_sock *pfk = pfkey_sk(sk);
|
|
int satype = hdr->sadb_msg_satype;
|
|
bool reset_errno = false;
|
|
|
|
if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
|
|
reset_errno = true;
|
|
if (satype != 0 && satype != 1)
|
|
return -EINVAL;
|
|
pfk->promisc = satype;
|
|
}
|
|
if (reset_errno && skb_cloned(skb))
|
|
skb = skb_copy(skb, GFP_KERNEL);
|
|
else
|
|
skb = skb_clone(skb, GFP_KERNEL);
|
|
|
|
if (reset_errno && skb) {
|
|
struct sadb_msg *new_hdr = (struct sadb_msg *) skb->data;
|
|
new_hdr->sadb_msg_errno = 0;
|
|
}
|
|
|
|
pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
|
|
return 0;
|
|
}
|
|
|
|
static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
|
|
{
|
|
int i;
|
|
u32 reqid = *(u32*)ptr;
|
|
|
|
for (i=0; i<xp->xfrm_nr; i++) {
|
|
if (xp->xfrm_vec[i].reqid == reqid)
|
|
return -EEXIST;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static u32 gen_reqid(struct net *net)
|
|
{
|
|
struct xfrm_policy_walk walk;
|
|
u32 start;
|
|
int rc;
|
|
static u32 reqid = IPSEC_MANUAL_REQID_MAX;
|
|
|
|
start = reqid;
|
|
do {
|
|
++reqid;
|
|
if (reqid == 0)
|
|
reqid = IPSEC_MANUAL_REQID_MAX+1;
|
|
xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
|
|
rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
|
|
xfrm_policy_walk_done(&walk);
|
|
if (rc != -EEXIST)
|
|
return reqid;
|
|
} while (reqid != start);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
|
|
{
|
|
struct net *net = xp_net(xp);
|
|
struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
|
|
int mode;
|
|
|
|
if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
|
|
return -ELOOP;
|
|
|
|
if (rq->sadb_x_ipsecrequest_mode == 0)
|
|
return -EINVAL;
|
|
|
|
t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
|
|
if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
|
|
return -EINVAL;
|
|
t->mode = mode;
|
|
if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
|
|
t->optional = 1;
|
|
else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
|
|
t->reqid = rq->sadb_x_ipsecrequest_reqid;
|
|
if (t->reqid > IPSEC_MANUAL_REQID_MAX)
|
|
t->reqid = 0;
|
|
if (!t->reqid && !(t->reqid = gen_reqid(net)))
|
|
return -ENOBUFS;
|
|
}
|
|
|
|
/* addresses present only in tunnel mode */
|
|
if (t->mode == XFRM_MODE_TUNNEL) {
|
|
u8 *sa = (u8 *) (rq + 1);
|
|
int family, socklen;
|
|
|
|
family = pfkey_sockaddr_extract((struct sockaddr *)sa,
|
|
&t->saddr);
|
|
if (!family)
|
|
return -EINVAL;
|
|
|
|
socklen = pfkey_sockaddr_len(family);
|
|
if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen),
|
|
&t->id.daddr) != family)
|
|
return -EINVAL;
|
|
t->encap_family = family;
|
|
} else
|
|
t->encap_family = xp->family;
|
|
|
|
/* No way to set this via kame pfkey */
|
|
t->allalgs = 1;
|
|
xp->xfrm_nr++;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
|
|
{
|
|
int err;
|
|
int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
|
|
struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
|
|
|
|
if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
|
|
return -EINVAL;
|
|
|
|
while (len >= sizeof(struct sadb_x_ipsecrequest)) {
|
|
if ((err = parse_ipsecrequest(xp, rq)) < 0)
|
|
return err;
|
|
len -= rq->sadb_x_ipsecrequest_len;
|
|
rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp)
|
|
{
|
|
struct xfrm_sec_ctx *xfrm_ctx = xp->security;
|
|
|
|
if (xfrm_ctx) {
|
|
int len = sizeof(struct sadb_x_sec_ctx);
|
|
len += xfrm_ctx->ctx_len;
|
|
return PFKEY_ALIGN8(len);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp)
|
|
{
|
|
const struct xfrm_tmpl *t;
|
|
int sockaddr_size = pfkey_sockaddr_size(xp->family);
|
|
int socklen = 0;
|
|
int i;
|
|
|
|
for (i=0; i<xp->xfrm_nr; i++) {
|
|
t = xp->xfrm_vec + i;
|
|
socklen += pfkey_sockaddr_len(t->encap_family);
|
|
}
|
|
|
|
return sizeof(struct sadb_msg) +
|
|
(sizeof(struct sadb_lifetime) * 3) +
|
|
(sizeof(struct sadb_address) * 2) +
|
|
(sockaddr_size * 2) +
|
|
sizeof(struct sadb_x_policy) +
|
|
(xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
|
|
(socklen * 2) +
|
|
pfkey_xfrm_policy2sec_ctx_size(xp);
|
|
}
|
|
|
|
static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp)
|
|
{
|
|
struct sk_buff *skb;
|
|
int size;
|
|
|
|
size = pfkey_xfrm_policy2msg_size(xp);
|
|
|
|
skb = alloc_skb(size + 16, GFP_ATOMIC);
|
|
if (skb == NULL)
|
|
return ERR_PTR(-ENOBUFS);
|
|
|
|
return skb;
|
|
}
|
|
|
|
static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir)
|
|
{
|
|
struct sadb_msg *hdr;
|
|
struct sadb_address *addr;
|
|
struct sadb_lifetime *lifetime;
|
|
struct sadb_x_policy *pol;
|
|
struct sadb_x_sec_ctx *sec_ctx;
|
|
struct xfrm_sec_ctx *xfrm_ctx;
|
|
int i;
|
|
int size;
|
|
int sockaddr_size = pfkey_sockaddr_size(xp->family);
|
|
int socklen = pfkey_sockaddr_len(xp->family);
|
|
|
|
size = pfkey_xfrm_policy2msg_size(xp);
|
|
|
|
/* call should fill header later */
|
|
hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
|
|
memset(hdr, 0, size); /* XXX do we need this ? */
|
|
|
|
/* src address */
|
|
addr = (struct sadb_address*) skb_put(skb,
|
|
sizeof(struct sadb_address)+sockaddr_size);
|
|
addr->sadb_address_len =
|
|
(sizeof(struct sadb_address)+sockaddr_size)/
|
|
sizeof(uint64_t);
|
|
addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
|
|
addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
|
|
addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
|
|
addr->sadb_address_reserved = 0;
|
|
if (!pfkey_sockaddr_fill(&xp->selector.saddr,
|
|
xp->selector.sport,
|
|
(struct sockaddr *) (addr + 1),
|
|
xp->family))
|
|
BUG();
|
|
|
|
/* dst address */
|
|
addr = (struct sadb_address*) skb_put(skb,
|
|
sizeof(struct sadb_address)+sockaddr_size);
|
|
addr->sadb_address_len =
|
|
(sizeof(struct sadb_address)+sockaddr_size)/
|
|
sizeof(uint64_t);
|
|
addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
|
|
addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
|
|
addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
|
|
addr->sadb_address_reserved = 0;
|
|
|
|
pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
|
|
(struct sockaddr *) (addr + 1),
|
|
xp->family);
|
|
|
|
/* hard time */
|
|
lifetime = (struct sadb_lifetime *) skb_put(skb,
|
|
sizeof(struct sadb_lifetime));
|
|
lifetime->sadb_lifetime_len =
|
|
sizeof(struct sadb_lifetime)/sizeof(uint64_t);
|
|
lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
|
|
lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.hard_packet_limit);
|
|
lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
|
|
lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
|
|
lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
|
|
/* soft time */
|
|
lifetime = (struct sadb_lifetime *) skb_put(skb,
|
|
sizeof(struct sadb_lifetime));
|
|
lifetime->sadb_lifetime_len =
|
|
sizeof(struct sadb_lifetime)/sizeof(uint64_t);
|
|
lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
|
|
lifetime->sadb_lifetime_allocations = _X2KEY(xp->lft.soft_packet_limit);
|
|
lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
|
|
lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
|
|
lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
|
|
/* current time */
|
|
lifetime = (struct sadb_lifetime *) skb_put(skb,
|
|
sizeof(struct sadb_lifetime));
|
|
lifetime->sadb_lifetime_len =
|
|
sizeof(struct sadb_lifetime)/sizeof(uint64_t);
|
|
lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
|
|
lifetime->sadb_lifetime_allocations = xp->curlft.packets;
|
|
lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
|
|
lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
|
|
lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
|
|
|
|
pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
|
|
pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
|
|
pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
|
|
pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
|
|
if (xp->action == XFRM_POLICY_ALLOW) {
|
|
if (xp->xfrm_nr)
|
|
pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
|
|
else
|
|
pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
|
|
}
|
|
pol->sadb_x_policy_dir = dir+1;
|
|
pol->sadb_x_policy_id = xp->index;
|
|
pol->sadb_x_policy_priority = xp->priority;
|
|
|
|
for (i=0; i<xp->xfrm_nr; i++) {
|
|
const struct xfrm_tmpl *t = xp->xfrm_vec + i;
|
|
struct sadb_x_ipsecrequest *rq;
|
|
int req_size;
|
|
int mode;
|
|
|
|
req_size = sizeof(struct sadb_x_ipsecrequest);
|
|
if (t->mode == XFRM_MODE_TUNNEL) {
|
|
socklen = pfkey_sockaddr_len(t->encap_family);
|
|
req_size += socklen * 2;
|
|
} else {
|
|
size -= 2*socklen;
|
|
}
|
|
rq = (void*)skb_put(skb, req_size);
|
|
pol->sadb_x_policy_len += req_size/8;
|
|
memset(rq, 0, sizeof(*rq));
|
|
rq->sadb_x_ipsecrequest_len = req_size;
|
|
rq->sadb_x_ipsecrequest_proto = t->id.proto;
|
|
if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
|
|
return -EINVAL;
|
|
rq->sadb_x_ipsecrequest_mode = mode;
|
|
rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
|
|
if (t->reqid)
|
|
rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
|
|
if (t->optional)
|
|
rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
|
|
rq->sadb_x_ipsecrequest_reqid = t->reqid;
|
|
|
|
if (t->mode == XFRM_MODE_TUNNEL) {
|
|
u8 *sa = (void *)(rq + 1);
|
|
pfkey_sockaddr_fill(&t->saddr, 0,
|
|
(struct sockaddr *)sa,
|
|
t->encap_family);
|
|
pfkey_sockaddr_fill(&t->id.daddr, 0,
|
|
(struct sockaddr *) (sa + socklen),
|
|
t->encap_family);
|
|
}
|
|
}
|
|
|
|
/* security context */
|
|
if ((xfrm_ctx = xp->security)) {
|
|
int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);
|
|
|
|
sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
|
|
sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
|
|
sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
|
|
sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
|
|
sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
|
|
sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
|
|
memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
|
|
xfrm_ctx->ctx_len);
|
|
}
|
|
|
|
hdr->sadb_msg_len = size / sizeof(uint64_t);
|
|
hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
|
|
{
|
|
struct sk_buff *out_skb;
|
|
struct sadb_msg *out_hdr;
|
|
int err;
|
|
|
|
out_skb = pfkey_xfrm_policy2msg_prep(xp);
|
|
if (IS_ERR(out_skb))
|
|
return PTR_ERR(out_skb);
|
|
|
|
err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
out_hdr = (struct sadb_msg *) out_skb->data;
|
|
out_hdr->sadb_msg_version = PF_KEY_V2;
|
|
|
|
if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
|
|
out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
|
|
else
|
|
out_hdr->sadb_msg_type = event2poltype(c->event);
|
|
out_hdr->sadb_msg_errno = 0;
|
|
out_hdr->sadb_msg_seq = c->seq;
|
|
out_hdr->sadb_msg_pid = c->portid;
|
|
pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
|
|
return 0;
|
|
|
|
}
|
|
|
|
static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
|
|
{
|
|
struct net *net = sock_net(sk);
|
|
int err = 0;
|
|
struct sadb_lifetime *lifetime;
|
|
struct sadb_address *sa;
|
|
struct sadb_x_policy *pol;
|
|
struct xfrm_policy *xp;
|
|
struct km_event c;
|
|
struct sadb_x_sec_ctx *sec_ctx;
|
|
|
|
if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
|
|
ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
|
|
!ext_hdrs[SADB_X_EXT_POLICY-1])
|
|
return -EINVAL;
|
|
|
|
pol = ext_hdrs[SADB_X_EXT_POLICY-1];
|
|
if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
|
|
return -EINVAL;
|
|
if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
|
|
return -EINVAL;
|
|
|
|
xp = xfrm_policy_alloc(net, GFP_KERNEL);
|
|
if (xp == NULL)
|
|
return -ENOBUFS;
|
|
|
|
xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
|
|
XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
|
|
xp->priority = pol->sadb_x_policy_priority;
|
|
|
|
sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
|
|
xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
|
|
if (!xp->family) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
xp->selector.family = xp->family;
|
|
xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
|
|
xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
|
|
xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
|
|
if (xp->selector.sport)
|
|
xp->selector.sport_mask = htons(0xffff);
|
|
|
|
sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
|
|
pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
|
|
xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
|
|
|
|
/* Amusing, we set this twice. KAME apps appear to set same value
|
|
* in both addresses.
|
|
*/
|
|
xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
|
|
|
|
xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
|
|
if (xp->selector.dport)
|
|
xp->selector.dport_mask = htons(0xffff);
|
|
|
|
sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
|
|
if (sec_ctx != NULL) {
|
|
struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
|
|
|
|
if (!uctx) {
|
|
err = -ENOBUFS;
|
|
goto out;
|
|
}
|
|
|
|
err = security_xfrm_policy_alloc(&xp->security, uctx);
|
|
kfree(uctx);
|
|
|
|
if (err)
|
|
goto out;
|
|
}
|
|
|
|
xp->lft.soft_byte_limit = XFRM_INF;
|
|
xp->lft.hard_byte_limit = XFRM_INF;
|
|
xp->lft.soft_packet_limit = XFRM_INF;
|
|
xp->lft.hard_packet_limit = XFRM_INF;
|
|
if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
|
|
xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
|
|
xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
|
|
xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
|
|
xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
|
|
}
|
|
if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
|
|
xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
|
|
xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
|
|
xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
|
|
xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
|
|
}
|
|
xp->xfrm_nr = 0;
|
|
if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
|
|
(err = parse_ipsecrequests(xp, pol)) < 0)
|
|
goto out;
|
|
|
|
err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
|
|
hdr->sadb_msg_type != SADB_X_SPDUPDATE);
|
|
|
|
xfrm_audit_policy_add(xp, err ? 0 : 1,
|
|
audit_get_loginuid(current),
|
|
audit_get_sessionid(current), 0);
|
|
|
|
if (err)
|
|
goto out;
|
|
|
|
if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
|
|
c.event = XFRM_MSG_UPDPOLICY;
|
|
else
|
|
c.event = XFRM_MSG_NEWPOLICY;
|
|
|
|
c.seq = hdr->sadb_msg_seq;
|
|
c.portid = hdr->sadb_msg_pid;
|
|
|
|
km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
|
|
xfrm_pol_put(xp);
|
|
return 0;
|
|
|
|
out:
|
|
xp->walk.dead = 1;
|
|
xfrm_policy_destroy(xp);
|
|
return err;
|
|
}
|
|
|
|
static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
|
|
{
|
|
struct net *net = sock_net(sk);
|
|
int err;
|
|
struct sadb_address *sa;
|
|
struct sadb_x_policy *pol;
|
|
struct xfrm_policy *xp;
|
|
struct xfrm_selector sel;
|
|
struct km_event c;
|
|
struct sadb_x_sec_ctx *sec_ctx;
|
|
struct xfrm_sec_ctx *pol_ctx = NULL;
|
|
|
|
if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
|
|
ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
|
|
!ext_hdrs[SADB_X_EXT_POLICY-1])
|
|
return -EINVAL;
|
|
|
|
pol = ext_hdrs[SADB_X_EXT_POLICY-1];
|
|
if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
|
|
return -EINVAL;
|
|
|
|
memset(&sel, 0, sizeof(sel));
|
|
|
|
sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
|
|
sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
|
|
sel.prefixlen_s = sa->sadb_address_prefixlen;
|
|
sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
|
|
sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
|
|
if (sel.sport)
|
|
sel.sport_mask = htons(0xffff);
|
|
|
|
sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
|
|
pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
|
|
sel.prefixlen_d = sa->sadb_address_prefixlen;
|
|
sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
|
|
sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
|
|
if (sel.dport)
|
|
sel.dport_mask = htons(0xffff);
|
|
|
|
sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1];
|
|
if (sec_ctx != NULL) {
|
|
struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
|
|
|
|
if (!uctx)
|
|
return -ENOMEM;
|
|
|
|
err = security_xfrm_policy_alloc(&pol_ctx, uctx);
|
|
kfree(uctx);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
|
|
pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
|
|
1, &err);
|
|
security_xfrm_policy_free(pol_ctx);
|
|
if (xp == NULL)
|
|
return -ENOENT;
|
|
|
|
xfrm_audit_policy_delete(xp, err ? 0 : 1,
|
|
audit_get_loginuid(current),
|
|
audit_get_sessionid(current), 0);
|
|
|
|
if (err)
|
|
goto out;
|
|
|
|
c.seq = hdr->sadb_msg_seq;
|
|
c.portid = hdr->sadb_msg_pid;
|
|
c.data.byid = 0;
|
|
c.event = XFRM_MSG_DELPOLICY;
|
|
km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
|
|
|
|
out:
|
|
xfrm_pol_put(xp);
|
|
return err;
|
|
}
|
|
|
|
static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir)
|
|
{
|
|
int err;
|
|
struct sk_buff *out_skb;
|
|
struct sadb_msg *out_hdr;
|
|
err = 0;
|
|
|
|
out_skb = pfkey_xfrm_policy2msg_prep(xp);
|
|
if (IS_ERR(out_skb)) {
|
|
err = PTR_ERR(out_skb);
|
|
goto out;
|
|
}
|
|
err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
|
|
if (err < 0)
|
|
goto out;
|
|
|
|
out_hdr = (struct sadb_msg *) out_skb->data;
|
|
out_hdr->sadb_msg_version = hdr->sadb_msg_version;
|
|
out_hdr->sadb_msg_type = hdr->sadb_msg_type;
|
|
out_hdr->sadb_msg_satype = 0;
|
|
out_hdr->sadb_msg_errno = 0;
|
|
out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
|
|
out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
|
|
pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
|
|
err = 0;
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
#ifdef CONFIG_NET_KEY_MIGRATE
|
|
static int pfkey_sockaddr_pair_size(sa_family_t family)
|
|
{
|
|
return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
|
|
}
|
|
|
|
static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
|
|
xfrm_address_t *saddr, xfrm_address_t *daddr,
|
|
u16 *family)
|
|
{
|
|
int af, socklen;
|
|
|
|
if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
|
|
return -EINVAL;
|
|
|
|
af = pfkey_sockaddr_extract(sa, saddr);
|
|
if (!af)
|
|
return -EINVAL;
|
|
|
|
socklen = pfkey_sockaddr_len(af);
|
|
if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
|
|
daddr) != af)
|
|
return -EINVAL;
|
|
|
|
*family = af;
|
|
return 0;
|
|
}
|
|
|
|
static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
|
|
struct xfrm_migrate *m)
|
|
{
|
|
int err;
|
|
struct sadb_x_ipsecrequest *rq2;
|
|
int mode;
|
|
|
|
if (len <= sizeof(struct sadb_x_ipsecrequest) ||
|
|
len < rq1->sadb_x_ipsecrequest_len)
|
|
return -EINVAL;
|
|
|
|
/* old endoints */
|
|
err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
|
|
rq1->sadb_x_ipsecrequest_len,
|
|
&m->old_saddr, &m->old_daddr,
|
|
&m->old_family);
|
|
if (err)
|
|
return err;
|
|
|
|
rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
|
|
len -= rq1->sadb_x_ipsecrequest_len;
|
|
|
|
if (len <= sizeof(struct sadb_x_ipsecrequest) ||
|
|
len < rq2->sadb_x_ipsecrequest_len)
|
|
return -EINVAL;
|
|
|
|
/* new endpoints */
|
|
err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
|
|
rq2->sadb_x_ipsecrequest_len,
|
|
&m->new_saddr, &m->new_daddr,
|
|
&m->new_family);
|
|
if (err)
|
|
return err;
|
|
|
|
if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
|
|
rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
|
|
rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
|
|
return -EINVAL;
|
|
|
|
m->proto = rq1->sadb_x_ipsecrequest_proto;
|
|
if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
|
|
return -EINVAL;
|
|
m->mode = mode;
|
|
m->reqid = rq1->sadb_x_ipsecrequest_reqid;
|
|
|
|
return ((int)(rq1->sadb_x_ipsecrequest_len +
|
|
rq2->sadb_x_ipsecrequest_len));
|
|
}
|
|
|
|
static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
|
|
const struct sadb_msg *hdr, void * const *ext_hdrs)
|
|
{
|
|
int i, len, ret, err = -EINVAL;
|
|
u8 dir;
|
|
struct sadb_address *sa;
|
|
struct sadb_x_kmaddress *kma;
|
|
struct sadb_x_policy *pol;
|
|
struct sadb_x_ipsecrequest *rq;
|
|
struct xfrm_selector sel;
|
|
struct xfrm_migrate m[XFRM_MAX_DEPTH];
|
|
struct xfrm_kmaddress k;
|
|
|
|
if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
|
|
ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
|
|
!ext_hdrs[SADB_X_EXT_POLICY - 1]) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
|
|
pol = ext_hdrs[SADB_X_EXT_POLICY - 1];
|
|
|
|
if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (kma) {
|
|
/* convert sadb_x_kmaddress to xfrm_kmaddress */
|
|
k.reserved = kma->sadb_x_kmaddress_reserved;
|
|
ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
|
|
8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
|
|
&k.local, &k.remote, &k.family);
|
|
if (ret < 0) {
|
|
err = ret;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
dir = pol->sadb_x_policy_dir - 1;
|
|
memset(&sel, 0, sizeof(sel));
|
|
|
|
/* set source address info of selector */
|
|
sa = ext_hdrs[SADB_EXT_ADDRESS_SRC - 1];
|
|
sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
|
|
sel.prefixlen_s = sa->sadb_address_prefixlen;
|
|
sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
|
|
sel.sport = ((struct sockaddr_in *)(sa + 1))->sin_port;
|
|
if (sel.sport)
|
|
sel.sport_mask = htons(0xffff);
|
|
|
|
/* set destination address info of selector */
|
|
sa = ext_hdrs[SADB_EXT_ADDRESS_DST - 1],
|
|
pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
|
|
sel.prefixlen_d = sa->sadb_address_prefixlen;
|
|
sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
|
|
sel.dport = ((struct sockaddr_in *)(sa + 1))->sin_port;
|
|
if (sel.dport)
|
|
sel.dport_mask = htons(0xffff);
|
|
|
|
rq = (struct sadb_x_ipsecrequest *)(pol + 1);
|
|
|
|
/* extract ipsecrequests */
|
|
i = 0;
|
|
len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);
|
|
|
|
while (len > 0 && i < XFRM_MAX_DEPTH) {
|
|
ret = ipsecrequests_to_migrate(rq, len, &m[i]);
|
|
if (ret < 0) {
|
|
err = ret;
|
|
goto out;
|
|
} else {
|
|
rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
|
|
len -= ret;
|
|
i++;
|
|
}
|
|
}
|
|
|
|
if (!i || len > 0) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
|
|
kma ? &k : NULL);
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
#else
|
|
static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
|
|
const struct sadb_msg *hdr, void * const *ext_hdrs)
|
|
{
|
|
return -ENOPROTOOPT;
|
|
}
|
|
#endif
|
|
|
|
|
|
static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
|
|
{
|
|
struct net *net = sock_net(sk);
|
|
unsigned int dir;
|
|
int err = 0, delete;
|
|
struct sadb_x_policy *pol;
|
|
struct xfrm_policy *xp;
|
|
struct km_event c;
|
|
|
|
if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
|
|
return -EINVAL;
|
|
|
|
dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
|
|
if (dir >= XFRM_POLICY_MAX)
|
|
return -EINVAL;
|
|
|
|
delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
|
|
xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
|
|
dir, pol->sadb_x_policy_id, delete, &err);
|
|
if (xp == NULL)
|
|
return -ENOENT;
|
|
|
|
if (delete) {
|
|
xfrm_audit_policy_delete(xp, err ? 0 : 1,
|
|
audit_get_loginuid(current),
|
|
audit_get_sessionid(current), 0);
|
|
|
|
if (err)
|
|
goto out;
|
|
c.seq = hdr->sadb_msg_seq;
|
|
c.portid = hdr->sadb_msg_pid;
|
|
c.data.byid = 1;
|
|
c.event = XFRM_MSG_DELPOLICY;
|
|
km_policy_notify(xp, dir, &c);
|
|
} else {
|
|
err = key_pol_get_resp(sk, xp, hdr, dir);
|
|
}
|
|
|
|
out:
|
|
xfrm_pol_put(xp);
|
|
return err;
|
|
}
|
|
|
|
static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
|
|
{
|
|
struct pfkey_sock *pfk = ptr;
|
|
struct sk_buff *out_skb;
|
|
struct sadb_msg *out_hdr;
|
|
int err;
|
|
|
|
if (!pfkey_can_dump(&pfk->sk))
|
|
return -ENOBUFS;
|
|
|
|
out_skb = pfkey_xfrm_policy2msg_prep(xp);
|
|
if (IS_ERR(out_skb))
|
|
return PTR_ERR(out_skb);
|
|
|
|
err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
out_hdr = (struct sadb_msg *) out_skb->data;
|
|
out_hdr->sadb_msg_version = pfk->dump.msg_version;
|
|
out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
|
|
out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
|
|
out_hdr->sadb_msg_errno = 0;
|
|
out_hdr->sadb_msg_seq = count + 1;
|
|
out_hdr->sadb_msg_pid = pfk->dump.msg_portid;
|
|
|
|
if (pfk->dump.skb)
|
|
pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
|
|
&pfk->sk, sock_net(&pfk->sk));
|
|
pfk->dump.skb = out_skb;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pfkey_dump_sp(struct pfkey_sock *pfk)
|
|
{
|
|
struct net *net = sock_net(&pfk->sk);
|
|
return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
|
|
}
|
|
|
|
static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
|
|
{
|
|
xfrm_policy_walk_done(&pfk->dump.u.policy);
|
|
}
|
|
|
|
static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
|
|
{
|
|
struct pfkey_sock *pfk = pfkey_sk(sk);
|
|
|
|
if (pfk->dump.dump != NULL)
|
|
return -EBUSY;
|
|
|
|
pfk->dump.msg_version = hdr->sadb_msg_version;
|
|
pfk->dump.msg_portid = hdr->sadb_msg_pid;
|
|
pfk->dump.dump = pfkey_dump_sp;
|
|
pfk->dump.done = pfkey_dump_sp_done;
|
|
xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);
|
|
|
|
return pfkey_do_dump(pfk);
|
|
}
|
|
|
|
static int key_notify_policy_flush(const struct km_event *c)
|
|
{
|
|
struct sk_buff *skb_out;
|
|
struct sadb_msg *hdr;
|
|
|
|
skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
|
|
if (!skb_out)
|
|
return -ENOBUFS;
|
|
hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
|
|
hdr->sadb_msg_type = SADB_X_SPDFLUSH;
|
|
hdr->sadb_msg_seq = c->seq;
|
|
hdr->sadb_msg_pid = c->portid;
|
|
hdr->sadb_msg_version = PF_KEY_V2;
|
|
hdr->sadb_msg_errno = (uint8_t) 0;
|
|
hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
|
|
pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
|
|
return 0;
|
|
|
|
}
|
|
|
|
static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
|
|
{
|
|
struct net *net = sock_net(sk);
|
|
struct km_event c;
|
|
struct xfrm_audit audit_info;
|
|
int err, err2;
|
|
|
|
audit_info.loginuid = audit_get_loginuid(current);
|
|
audit_info.sessionid = audit_get_sessionid(current);
|
|
audit_info.secid = 0;
|
|
err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info);
|
|
err2 = unicast_flush_resp(sk, hdr);
|
|
if (err || err2) {
|
|
if (err == -ESRCH) /* empty table - old silent behavior */
|
|
return 0;
|
|
return err;
|
|
}
|
|
|
|
c.data.type = XFRM_POLICY_TYPE_MAIN;
|
|
c.event = XFRM_MSG_FLUSHPOLICY;
|
|
c.portid = hdr->sadb_msg_pid;
|
|
c.seq = hdr->sadb_msg_seq;
|
|
c.net = net;
|
|
km_policy_notify(NULL, 0, &c);
|
|
|
|
return 0;
|
|
}
|
|
|
|
typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
|
|
const struct sadb_msg *hdr, void * const *ext_hdrs);
|
|
static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
|
|
[SADB_RESERVED] = pfkey_reserved,
|
|
[SADB_GETSPI] = pfkey_getspi,
|
|
[SADB_UPDATE] = pfkey_add,
|
|
[SADB_ADD] = pfkey_add,
|
|
[SADB_DELETE] = pfkey_delete,
|
|
[SADB_GET] = pfkey_get,
|
|
[SADB_ACQUIRE] = pfkey_acquire,
|
|
[SADB_REGISTER] = pfkey_register,
|
|
[SADB_EXPIRE] = NULL,
|
|
[SADB_FLUSH] = pfkey_flush,
|
|
[SADB_DUMP] = pfkey_dump,
|
|
[SADB_X_PROMISC] = pfkey_promisc,
|
|
[SADB_X_PCHANGE] = NULL,
|
|
[SADB_X_SPDUPDATE] = pfkey_spdadd,
|
|
[SADB_X_SPDADD] = pfkey_spdadd,
|
|
[SADB_X_SPDDELETE] = pfkey_spddelete,
|
|
[SADB_X_SPDGET] = pfkey_spdget,
|
|
[SADB_X_SPDACQUIRE] = NULL,
|
|
[SADB_X_SPDDUMP] = pfkey_spddump,
|
|
[SADB_X_SPDFLUSH] = pfkey_spdflush,
|
|
[SADB_X_SPDSETIDX] = pfkey_spdadd,
|
|
[SADB_X_SPDDELETE2] = pfkey_spdget,
|
|
[SADB_X_MIGRATE] = pfkey_migrate,
|
|
};
|
|
|
|
static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr)
|
|
{
|
|
void *ext_hdrs[SADB_EXT_MAX];
|
|
int err;
|
|
|
|
pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
|
|
BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
|
|
|
|
memset(ext_hdrs, 0, sizeof(ext_hdrs));
|
|
err = parse_exthdrs(skb, hdr, ext_hdrs);
|
|
if (!err) {
|
|
err = -EOPNOTSUPP;
|
|
if (pfkey_funcs[hdr->sadb_msg_type])
|
|
err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
|
|
{
|
|
struct sadb_msg *hdr = NULL;
|
|
|
|
if (skb->len < sizeof(*hdr)) {
|
|
*errp = -EMSGSIZE;
|
|
} else {
|
|
hdr = (struct sadb_msg *) skb->data;
|
|
if (hdr->sadb_msg_version != PF_KEY_V2 ||
|
|
hdr->sadb_msg_reserved != 0 ||
|
|
(hdr->sadb_msg_type <= SADB_RESERVED ||
|
|
hdr->sadb_msg_type > SADB_MAX)) {
|
|
hdr = NULL;
|
|
*errp = -EINVAL;
|
|
} else if (hdr->sadb_msg_len != (skb->len /
|
|
sizeof(uint64_t)) ||
|
|
hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
|
|
sizeof(uint64_t))) {
|
|
hdr = NULL;
|
|
*errp = -EMSGSIZE;
|
|
} else {
|
|
*errp = 0;
|
|
}
|
|
}
|
|
return hdr;
|
|
}
|
|
|
|
static inline int aalg_tmpl_set(const struct xfrm_tmpl *t,
|
|
const struct xfrm_algo_desc *d)
|
|
{
|
|
unsigned int id = d->desc.sadb_alg_id;
|
|
|
|
if (id >= sizeof(t->aalgos) * 8)
|
|
return 0;
|
|
|
|
return (t->aalgos >> id) & 1;
|
|
}
|
|
|
|
static inline int ealg_tmpl_set(const struct xfrm_tmpl *t,
|
|
const struct xfrm_algo_desc *d)
|
|
{
|
|
unsigned int id = d->desc.sadb_alg_id;
|
|
|
|
if (id >= sizeof(t->ealgos) * 8)
|
|
return 0;
|
|
|
|
return (t->ealgos >> id) & 1;
|
|
}
|
|
|
|
static int count_ah_combs(const struct xfrm_tmpl *t)
|
|
{
|
|
int i, sz = 0;
|
|
|
|
for (i = 0; ; i++) {
|
|
const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
|
|
if (!aalg)
|
|
break;
|
|
if (aalg_tmpl_set(t, aalg) && aalg->available)
|
|
sz += sizeof(struct sadb_comb);
|
|
}
|
|
return sz + sizeof(struct sadb_prop);
|
|
}
|
|
|
|
static int count_esp_combs(const struct xfrm_tmpl *t)
|
|
{
|
|
int i, k, sz = 0;
|
|
|
|
for (i = 0; ; i++) {
|
|
const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
|
|
if (!ealg)
|
|
break;
|
|
|
|
if (!(ealg_tmpl_set(t, ealg) && ealg->available))
|
|
continue;
|
|
|
|
for (k = 1; ; k++) {
|
|
const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
|
|
if (!aalg)
|
|
break;
|
|
|
|
if (aalg_tmpl_set(t, aalg) && aalg->available)
|
|
sz += sizeof(struct sadb_comb);
|
|
}
|
|
}
|
|
return sz + sizeof(struct sadb_prop);
|
|
}
|
|
|
|
static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
|
|
{
|
|
struct sadb_prop *p;
|
|
int i;
|
|
|
|
p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
|
|
p->sadb_prop_len = sizeof(struct sadb_prop)/8;
|
|
p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
|
|
p->sadb_prop_replay = 32;
|
|
memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
|
|
|
|
for (i = 0; ; i++) {
|
|
const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
|
|
if (!aalg)
|
|
break;
|
|
|
|
if (aalg_tmpl_set(t, aalg) && aalg->available) {
|
|
struct sadb_comb *c;
|
|
c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
|
|
memset(c, 0, sizeof(*c));
|
|
p->sadb_prop_len += sizeof(struct sadb_comb)/8;
|
|
c->sadb_comb_auth = aalg->desc.sadb_alg_id;
|
|
c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
|
|
c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
|
|
c->sadb_comb_hard_addtime = 24*60*60;
|
|
c->sadb_comb_soft_addtime = 20*60*60;
|
|
c->sadb_comb_hard_usetime = 8*60*60;
|
|
c->sadb_comb_soft_usetime = 7*60*60;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t)
|
|
{
|
|
struct sadb_prop *p;
|
|
int i, k;
|
|
|
|
p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
|
|
p->sadb_prop_len = sizeof(struct sadb_prop)/8;
|
|
p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
|
|
p->sadb_prop_replay = 32;
|
|
memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
|
|
|
|
for (i=0; ; i++) {
|
|
const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
|
|
if (!ealg)
|
|
break;
|
|
|
|
if (!(ealg_tmpl_set(t, ealg) && ealg->available))
|
|
continue;
|
|
|
|
for (k = 1; ; k++) {
|
|
struct sadb_comb *c;
|
|
const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
|
|
if (!aalg)
|
|
break;
|
|
if (!(aalg_tmpl_set(t, aalg) && aalg->available))
|
|
continue;
|
|
c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
|
|
memset(c, 0, sizeof(*c));
|
|
p->sadb_prop_len += sizeof(struct sadb_comb)/8;
|
|
c->sadb_comb_auth = aalg->desc.sadb_alg_id;
|
|
c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
|
|
c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
|
|
c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
|
|
c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
|
|
c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
|
|
c->sadb_comb_hard_addtime = 24*60*60;
|
|
c->sadb_comb_soft_addtime = 20*60*60;
|
|
c->sadb_comb_hard_usetime = 8*60*60;
|
|
c->sadb_comb_soft_usetime = 7*60*60;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c)
|
|
{
|
|
struct sk_buff *out_skb;
|
|
struct sadb_msg *out_hdr;
|
|
int hard;
|
|
int hsc;
|
|
|
|
hard = c->data.hard;
|
|
if (hard)
|
|
hsc = 2;
|
|
else
|
|
hsc = 1;
|
|
|
|
out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
|
|
if (IS_ERR(out_skb))
|
|
return PTR_ERR(out_skb);
|
|
|
|
out_hdr = (struct sadb_msg *) out_skb->data;
|
|
out_hdr->sadb_msg_version = PF_KEY_V2;
|
|
out_hdr->sadb_msg_type = SADB_EXPIRE;
|
|
out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
|
|
out_hdr->sadb_msg_errno = 0;
|
|
out_hdr->sadb_msg_reserved = 0;
|
|
out_hdr->sadb_msg_seq = 0;
|
|
out_hdr->sadb_msg_pid = 0;
|
|
|
|
pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
|
|
return 0;
|
|
}
|
|
|
|
static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c)
|
|
{
|
|
struct net *net = x ? xs_net(x) : c->net;
|
|
struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
|
|
|
|
if (atomic_read(&net_pfkey->socks_nr) == 0)
|
|
return 0;
|
|
|
|
switch (c->event) {
|
|
case XFRM_MSG_EXPIRE:
|
|
return key_notify_sa_expire(x, c);
|
|
case XFRM_MSG_DELSA:
|
|
case XFRM_MSG_NEWSA:
|
|
case XFRM_MSG_UPDSA:
|
|
return key_notify_sa(x, c);
|
|
case XFRM_MSG_FLUSHSA:
|
|
return key_notify_sa_flush(c);
|
|
case XFRM_MSG_NEWAE: /* not yet supported */
|
|
break;
|
|
default:
|
|
pr_err("pfkey: Unknown SA event %d\n", c->event);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
|
|
{
|
|
if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
|
|
return 0;
|
|
|
|
switch (c->event) {
|
|
case XFRM_MSG_POLEXPIRE:
|
|
return key_notify_policy_expire(xp, c);
|
|
case XFRM_MSG_DELPOLICY:
|
|
case XFRM_MSG_NEWPOLICY:
|
|
case XFRM_MSG_UPDPOLICY:
|
|
return key_notify_policy(xp, dir, c);
|
|
case XFRM_MSG_FLUSHPOLICY:
|
|
if (c->data.type != XFRM_POLICY_TYPE_MAIN)
|
|
break;
|
|
return key_notify_policy_flush(c);
|
|
default:
|
|
pr_err("pfkey: Unknown policy event %d\n", c->event);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u32 get_acqseq(void)
|
|
{
|
|
u32 res;
|
|
static atomic_t acqseq;
|
|
|
|
do {
|
|
res = atomic_inc_return(&acqseq);
|
|
} while (!res);
|
|
return res;
|
|
}
|
|
|
|
static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct sadb_msg *hdr;
|
|
struct sadb_address *addr;
|
|
struct sadb_x_policy *pol;
|
|
int sockaddr_size;
|
|
int size;
|
|
struct sadb_x_sec_ctx *sec_ctx;
|
|
struct xfrm_sec_ctx *xfrm_ctx;
|
|
int ctx_size = 0;
|
|
|
|
sockaddr_size = pfkey_sockaddr_size(x->props.family);
|
|
if (!sockaddr_size)
|
|
return -EINVAL;
|
|
|
|
size = sizeof(struct sadb_msg) +
|
|
(sizeof(struct sadb_address) * 2) +
|
|
(sockaddr_size * 2) +
|
|
sizeof(struct sadb_x_policy);
|
|
|
|
if (x->id.proto == IPPROTO_AH)
|
|
size += count_ah_combs(t);
|
|
else if (x->id.proto == IPPROTO_ESP)
|
|
size += count_esp_combs(t);
|
|
|
|
if ((xfrm_ctx = x->security)) {
|
|
ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
|
|
size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
|
|
}
|
|
|
|
skb = alloc_skb(size + 16, GFP_ATOMIC);
|
|
if (skb == NULL)
|
|
return -ENOMEM;
|
|
|
|
hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
|
|
hdr->sadb_msg_version = PF_KEY_V2;
|
|
hdr->sadb_msg_type = SADB_ACQUIRE;
|
|
hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
|
|
hdr->sadb_msg_len = size / sizeof(uint64_t);
|
|
hdr->sadb_msg_errno = 0;
|
|
hdr->sadb_msg_reserved = 0;
|
|
hdr->sadb_msg_seq = x->km.seq = get_acqseq();
|
|
hdr->sadb_msg_pid = 0;
|
|
|
|
/* src address */
|
|
addr = (struct sadb_address*) skb_put(skb,
|
|
sizeof(struct sadb_address)+sockaddr_size);
|
|
addr->sadb_address_len =
|
|
(sizeof(struct sadb_address)+sockaddr_size)/
|
|
sizeof(uint64_t);
|
|
addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
|
|
addr->sadb_address_proto = 0;
|
|
addr->sadb_address_reserved = 0;
|
|
addr->sadb_address_prefixlen =
|
|
pfkey_sockaddr_fill(&x->props.saddr, 0,
|
|
(struct sockaddr *) (addr + 1),
|
|
x->props.family);
|
|
if (!addr->sadb_address_prefixlen)
|
|
BUG();
|
|
|
|
/* dst address */
|
|
addr = (struct sadb_address*) skb_put(skb,
|
|
sizeof(struct sadb_address)+sockaddr_size);
|
|
addr->sadb_address_len =
|
|
(sizeof(struct sadb_address)+sockaddr_size)/
|
|
sizeof(uint64_t);
|
|
addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
|
|
addr->sadb_address_proto = 0;
|
|
addr->sadb_address_reserved = 0;
|
|
addr->sadb_address_prefixlen =
|
|
pfkey_sockaddr_fill(&x->id.daddr, 0,
|
|
(struct sockaddr *) (addr + 1),
|
|
x->props.family);
|
|
if (!addr->sadb_address_prefixlen)
|
|
BUG();
|
|
|
|
pol = (struct sadb_x_policy *) skb_put(skb, sizeof(struct sadb_x_policy));
|
|
pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
|
|
pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
|
|
pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
|
|
pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
|
|
pol->sadb_x_policy_id = xp->index;
|
|
|
|
/* Set sadb_comb's. */
|
|
if (x->id.proto == IPPROTO_AH)
|
|
dump_ah_combs(skb, t);
|
|
else if (x->id.proto == IPPROTO_ESP)
|
|
dump_esp_combs(skb, t);
|
|
|
|
/* security context */
|
|
if (xfrm_ctx) {
|
|
sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
|
|
sizeof(struct sadb_x_sec_ctx) + ctx_size);
|
|
sec_ctx->sadb_x_sec_len =
|
|
(sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
|
|
sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
|
|
sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
|
|
sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
|
|
sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
|
|
memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
|
|
xfrm_ctx->ctx_len);
|
|
}
|
|
|
|
return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
|
|
}
|
|
|
|
static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
|
|
u8 *data, int len, int *dir)
|
|
{
|
|
struct net *net = sock_net(sk);
|
|
struct xfrm_policy *xp;
|
|
struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
|
|
struct sadb_x_sec_ctx *sec_ctx;
|
|
|
|
switch (sk->sk_family) {
|
|
case AF_INET:
|
|
if (opt != IP_IPSEC_POLICY) {
|
|
*dir = -EOPNOTSUPP;
|
|
return NULL;
|
|
}
|
|
break;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
case AF_INET6:
|
|
if (opt != IPV6_IPSEC_POLICY) {
|
|
*dir = -EOPNOTSUPP;
|
|
return NULL;
|
|
}
|
|
break;
|
|
#endif
|
|
default:
|
|
*dir = -EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
*dir = -EINVAL;
|
|
|
|
if (len < sizeof(struct sadb_x_policy) ||
|
|
pol->sadb_x_policy_len*8 > len ||
|
|
pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
|
|
(!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
|
|
return NULL;
|
|
|
|
xp = xfrm_policy_alloc(net, GFP_ATOMIC);
|
|
if (xp == NULL) {
|
|
*dir = -ENOBUFS;
|
|
return NULL;
|
|
}
|
|
|
|
xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
|
|
XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
|
|
|
|
xp->lft.soft_byte_limit = XFRM_INF;
|
|
xp->lft.hard_byte_limit = XFRM_INF;
|
|
xp->lft.soft_packet_limit = XFRM_INF;
|
|
xp->lft.hard_packet_limit = XFRM_INF;
|
|
xp->family = sk->sk_family;
|
|
|
|
xp->xfrm_nr = 0;
|
|
if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
|
|
(*dir = parse_ipsecrequests(xp, pol)) < 0)
|
|
goto out;
|
|
|
|
/* security context too */
|
|
if (len >= (pol->sadb_x_policy_len*8 +
|
|
sizeof(struct sadb_x_sec_ctx))) {
|
|
char *p = (char *)pol;
|
|
struct xfrm_user_sec_ctx *uctx;
|
|
|
|
p += pol->sadb_x_policy_len*8;
|
|
sec_ctx = (struct sadb_x_sec_ctx *)p;
|
|
if (len < pol->sadb_x_policy_len*8 +
|
|
sec_ctx->sadb_x_sec_len) {
|
|
*dir = -EINVAL;
|
|
goto out;
|
|
}
|
|
if ((*dir = verify_sec_ctx_len(p)))
|
|
goto out;
|
|
uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
|
|
*dir = security_xfrm_policy_alloc(&xp->security, uctx);
|
|
kfree(uctx);
|
|
|
|
if (*dir)
|
|
goto out;
|
|
}
|
|
|
|
*dir = pol->sadb_x_policy_dir-1;
|
|
return xp;
|
|
|
|
out:
|
|
xp->walk.dead = 1;
|
|
xfrm_policy_destroy(xp);
|
|
return NULL;
|
|
}
|
|
|
|
static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct sadb_msg *hdr;
|
|
struct sadb_sa *sa;
|
|
struct sadb_address *addr;
|
|
struct sadb_x_nat_t_port *n_port;
|
|
int sockaddr_size;
|
|
int size;
|
|
__u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
|
|
struct xfrm_encap_tmpl *natt = NULL;
|
|
|
|
sockaddr_size = pfkey_sockaddr_size(x->props.family);
|
|
if (!sockaddr_size)
|
|
return -EINVAL;
|
|
|
|
if (!satype)
|
|
return -EINVAL;
|
|
|
|
if (!x->encap)
|
|
return -EINVAL;
|
|
|
|
natt = x->encap;
|
|
|
|
/* Build an SADB_X_NAT_T_NEW_MAPPING message:
|
|
*
|
|
* HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
|
|
* ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
|
|
*/
|
|
|
|
size = sizeof(struct sadb_msg) +
|
|
sizeof(struct sadb_sa) +
|
|
(sizeof(struct sadb_address) * 2) +
|
|
(sockaddr_size * 2) +
|
|
(sizeof(struct sadb_x_nat_t_port) * 2);
|
|
|
|
skb = alloc_skb(size + 16, GFP_ATOMIC);
|
|
if (skb == NULL)
|
|
return -ENOMEM;
|
|
|
|
hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
|
|
hdr->sadb_msg_version = PF_KEY_V2;
|
|
hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
|
|
hdr->sadb_msg_satype = satype;
|
|
hdr->sadb_msg_len = size / sizeof(uint64_t);
|
|
hdr->sadb_msg_errno = 0;
|
|
hdr->sadb_msg_reserved = 0;
|
|
hdr->sadb_msg_seq = x->km.seq = get_acqseq();
|
|
hdr->sadb_msg_pid = 0;
|
|
|
|
/* SA */
|
|
sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
|
|
sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
|
|
sa->sadb_sa_exttype = SADB_EXT_SA;
|
|
sa->sadb_sa_spi = x->id.spi;
|
|
sa->sadb_sa_replay = 0;
|
|
sa->sadb_sa_state = 0;
|
|
sa->sadb_sa_auth = 0;
|
|
sa->sadb_sa_encrypt = 0;
|
|
sa->sadb_sa_flags = 0;
|
|
|
|
/* ADDRESS_SRC (old addr) */
|
|
addr = (struct sadb_address*)
|
|
skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
|
|
addr->sadb_address_len =
|
|
(sizeof(struct sadb_address)+sockaddr_size)/
|
|
sizeof(uint64_t);
|
|
addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
|
|
addr->sadb_address_proto = 0;
|
|
addr->sadb_address_reserved = 0;
|
|
addr->sadb_address_prefixlen =
|
|
pfkey_sockaddr_fill(&x->props.saddr, 0,
|
|
(struct sockaddr *) (addr + 1),
|
|
x->props.family);
|
|
if (!addr->sadb_address_prefixlen)
|
|
BUG();
|
|
|
|
/* NAT_T_SPORT (old port) */
|
|
n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
|
|
n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
|
|
n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
|
|
n_port->sadb_x_nat_t_port_port = natt->encap_sport;
|
|
n_port->sadb_x_nat_t_port_reserved = 0;
|
|
|
|
/* ADDRESS_DST (new addr) */
|
|
addr = (struct sadb_address*)
|
|
skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
|
|
addr->sadb_address_len =
|
|
(sizeof(struct sadb_address)+sockaddr_size)/
|
|
sizeof(uint64_t);
|
|
addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
|
|
addr->sadb_address_proto = 0;
|
|
addr->sadb_address_reserved = 0;
|
|
addr->sadb_address_prefixlen =
|
|
pfkey_sockaddr_fill(ipaddr, 0,
|
|
(struct sockaddr *) (addr + 1),
|
|
x->props.family);
|
|
if (!addr->sadb_address_prefixlen)
|
|
BUG();
|
|
|
|
/* NAT_T_DPORT (new port) */
|
|
n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
|
|
n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
|
|
n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
|
|
n_port->sadb_x_nat_t_port_port = sport;
|
|
n_port->sadb_x_nat_t_port_reserved = 0;
|
|
|
|
return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
|
|
}
|
|
|
|
#ifdef CONFIG_NET_KEY_MIGRATE
|
|
static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
|
|
const struct xfrm_selector *sel)
|
|
{
|
|
struct sadb_address *addr;
|
|
addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
|
|
addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
|
|
addr->sadb_address_exttype = type;
|
|
addr->sadb_address_proto = sel->proto;
|
|
addr->sadb_address_reserved = 0;
|
|
|
|
switch (type) {
|
|
case SADB_EXT_ADDRESS_SRC:
|
|
addr->sadb_address_prefixlen = sel->prefixlen_s;
|
|
pfkey_sockaddr_fill(&sel->saddr, 0,
|
|
(struct sockaddr *)(addr + 1),
|
|
sel->family);
|
|
break;
|
|
case SADB_EXT_ADDRESS_DST:
|
|
addr->sadb_address_prefixlen = sel->prefixlen_d;
|
|
pfkey_sockaddr_fill(&sel->daddr, 0,
|
|
(struct sockaddr *)(addr + 1),
|
|
sel->family);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k)
|
|
{
|
|
struct sadb_x_kmaddress *kma;
|
|
u8 *sa;
|
|
int family = k->family;
|
|
int socklen = pfkey_sockaddr_len(family);
|
|
int size_req;
|
|
|
|
size_req = (sizeof(struct sadb_x_kmaddress) +
|
|
pfkey_sockaddr_pair_size(family));
|
|
|
|
kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
|
|
memset(kma, 0, size_req);
|
|
kma->sadb_x_kmaddress_len = size_req / 8;
|
|
kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
|
|
kma->sadb_x_kmaddress_reserved = k->reserved;
|
|
|
|
sa = (u8 *)(kma + 1);
|
|
if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
|
|
!pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int set_ipsecrequest(struct sk_buff *skb,
|
|
uint8_t proto, uint8_t mode, int level,
|
|
uint32_t reqid, uint8_t family,
|
|
const xfrm_address_t *src, const xfrm_address_t *dst)
|
|
{
|
|
struct sadb_x_ipsecrequest *rq;
|
|
u8 *sa;
|
|
int socklen = pfkey_sockaddr_len(family);
|
|
int size_req;
|
|
|
|
size_req = sizeof(struct sadb_x_ipsecrequest) +
|
|
pfkey_sockaddr_pair_size(family);
|
|
|
|
rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
|
|
memset(rq, 0, size_req);
|
|
rq->sadb_x_ipsecrequest_len = size_req;
|
|
rq->sadb_x_ipsecrequest_proto = proto;
|
|
rq->sadb_x_ipsecrequest_mode = mode;
|
|
rq->sadb_x_ipsecrequest_level = level;
|
|
rq->sadb_x_ipsecrequest_reqid = reqid;
|
|
|
|
sa = (u8 *) (rq + 1);
|
|
if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
|
|
!pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_NET_KEY_MIGRATE
|
|
static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
|
|
const struct xfrm_migrate *m, int num_bundles,
|
|
const struct xfrm_kmaddress *k)
|
|
{
|
|
int i;
|
|
int sasize_sel;
|
|
int size = 0;
|
|
int size_pol = 0;
|
|
struct sk_buff *skb;
|
|
struct sadb_msg *hdr;
|
|
struct sadb_x_policy *pol;
|
|
const struct xfrm_migrate *mp;
|
|
|
|
if (type != XFRM_POLICY_TYPE_MAIN)
|
|
return 0;
|
|
|
|
if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
|
|
return -EINVAL;
|
|
|
|
if (k != NULL) {
|
|
/* addresses for KM */
|
|
size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
|
|
pfkey_sockaddr_pair_size(k->family));
|
|
}
|
|
|
|
/* selector */
|
|
sasize_sel = pfkey_sockaddr_size(sel->family);
|
|
if (!sasize_sel)
|
|
return -EINVAL;
|
|
size += (sizeof(struct sadb_address) + sasize_sel) * 2;
|
|
|
|
/* policy info */
|
|
size_pol += sizeof(struct sadb_x_policy);
|
|
|
|
/* ipsecrequests */
|
|
for (i = 0, mp = m; i < num_bundles; i++, mp++) {
|
|
/* old locator pair */
|
|
size_pol += sizeof(struct sadb_x_ipsecrequest) +
|
|
pfkey_sockaddr_pair_size(mp->old_family);
|
|
/* new locator pair */
|
|
size_pol += sizeof(struct sadb_x_ipsecrequest) +
|
|
pfkey_sockaddr_pair_size(mp->new_family);
|
|
}
|
|
|
|
size += sizeof(struct sadb_msg) + size_pol;
|
|
|
|
/* alloc buffer */
|
|
skb = alloc_skb(size, GFP_ATOMIC);
|
|
if (skb == NULL)
|
|
return -ENOMEM;
|
|
|
|
hdr = (struct sadb_msg *)skb_put(skb, sizeof(struct sadb_msg));
|
|
hdr->sadb_msg_version = PF_KEY_V2;
|
|
hdr->sadb_msg_type = SADB_X_MIGRATE;
|
|
hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
|
|
hdr->sadb_msg_len = size / 8;
|
|
hdr->sadb_msg_errno = 0;
|
|
hdr->sadb_msg_reserved = 0;
|
|
hdr->sadb_msg_seq = 0;
|
|
hdr->sadb_msg_pid = 0;
|
|
|
|
/* Addresses to be used by KM for negotiation, if ext is available */
|
|
if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
|
|
goto err;
|
|
|
|
/* selector src */
|
|
set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);
|
|
|
|
/* selector dst */
|
|
set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);
|
|
|
|
/* policy information */
|
|
pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
|
|
pol->sadb_x_policy_len = size_pol / 8;
|
|
pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
|
|
pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
|
|
pol->sadb_x_policy_dir = dir + 1;
|
|
pol->sadb_x_policy_id = 0;
|
|
pol->sadb_x_policy_priority = 0;
|
|
|
|
for (i = 0, mp = m; i < num_bundles; i++, mp++) {
|
|
/* old ipsecrequest */
|
|
int mode = pfkey_mode_from_xfrm(mp->mode);
|
|
if (mode < 0)
|
|
goto err;
|
|
if (set_ipsecrequest(skb, mp->proto, mode,
|
|
(mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
|
|
mp->reqid, mp->old_family,
|
|
&mp->old_saddr, &mp->old_daddr) < 0)
|
|
goto err;
|
|
|
|
/* new ipsecrequest */
|
|
if (set_ipsecrequest(skb, mp->proto, mode,
|
|
(mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
|
|
mp->reqid, mp->new_family,
|
|
&mp->new_saddr, &mp->new_daddr) < 0)
|
|
goto err;
|
|
}
|
|
|
|
/* broadcast migrate message to sockets */
|
|
pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
|
|
|
|
return 0;
|
|
|
|
err:
|
|
kfree_skb(skb);
|
|
return -EINVAL;
|
|
}
|
|
#else
|
|
static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
|
|
const struct xfrm_migrate *m, int num_bundles,
|
|
const struct xfrm_kmaddress *k)
|
|
{
|
|
return -ENOPROTOOPT;
|
|
}
|
|
#endif
|
|
|
|
static int pfkey_sendmsg(struct kiocb *kiocb,
|
|
struct socket *sock, struct msghdr *msg, size_t len)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct sk_buff *skb = NULL;
|
|
struct sadb_msg *hdr = NULL;
|
|
int err;
|
|
|
|
err = -EOPNOTSUPP;
|
|
if (msg->msg_flags & MSG_OOB)
|
|
goto out;
|
|
|
|
err = -EMSGSIZE;
|
|
if ((unsigned int)len > sk->sk_sndbuf - 32)
|
|
goto out;
|
|
|
|
err = -ENOBUFS;
|
|
skb = alloc_skb(len, GFP_KERNEL);
|
|
if (skb == NULL)
|
|
goto out;
|
|
|
|
err = -EFAULT;
|
|
if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
|
|
goto out;
|
|
|
|
hdr = pfkey_get_base_msg(skb, &err);
|
|
if (!hdr)
|
|
goto out;
|
|
|
|
mutex_lock(&xfrm_cfg_mutex);
|
|
err = pfkey_process(sk, skb, hdr);
|
|
mutex_unlock(&xfrm_cfg_mutex);
|
|
|
|
out:
|
|
if (err && hdr && pfkey_error(hdr, err, sk) == 0)
|
|
err = 0;
|
|
kfree_skb(skb);
|
|
|
|
return err ? : len;
|
|
}
|
|
|
|
static int pfkey_recvmsg(struct kiocb *kiocb,
|
|
struct socket *sock, struct msghdr *msg, size_t len,
|
|
int flags)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct pfkey_sock *pfk = pfkey_sk(sk);
|
|
struct sk_buff *skb;
|
|
int copied, err;
|
|
|
|
err = -EINVAL;
|
|
if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
|
|
goto out;
|
|
|
|
msg->msg_namelen = 0;
|
|
skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
|
|
if (skb == NULL)
|
|
goto out;
|
|
|
|
copied = skb->len;
|
|
if (copied > len) {
|
|
msg->msg_flags |= MSG_TRUNC;
|
|
copied = len;
|
|
}
|
|
|
|
skb_reset_transport_header(skb);
|
|
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
|
|
if (err)
|
|
goto out_free;
|
|
|
|
sock_recv_ts_and_drops(msg, sk, skb);
|
|
|
|
err = (flags & MSG_TRUNC) ? skb->len : copied;
|
|
|
|
if (pfk->dump.dump != NULL &&
|
|
3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
|
|
pfkey_do_dump(pfk);
|
|
|
|
out_free:
|
|
skb_free_datagram(sk, skb);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static const struct proto_ops pfkey_ops = {
|
|
.family = PF_KEY,
|
|
.owner = THIS_MODULE,
|
|
/* Operations that make no sense on pfkey sockets. */
|
|
.bind = sock_no_bind,
|
|
.connect = sock_no_connect,
|
|
.socketpair = sock_no_socketpair,
|
|
.accept = sock_no_accept,
|
|
.getname = sock_no_getname,
|
|
.ioctl = sock_no_ioctl,
|
|
.listen = sock_no_listen,
|
|
.shutdown = sock_no_shutdown,
|
|
.setsockopt = sock_no_setsockopt,
|
|
.getsockopt = sock_no_getsockopt,
|
|
.mmap = sock_no_mmap,
|
|
.sendpage = sock_no_sendpage,
|
|
|
|
/* Now the operations that really occur. */
|
|
.release = pfkey_release,
|
|
.poll = datagram_poll,
|
|
.sendmsg = pfkey_sendmsg,
|
|
.recvmsg = pfkey_recvmsg,
|
|
};
|
|
|
|
static const struct net_proto_family pfkey_family_ops = {
|
|
.family = PF_KEY,
|
|
.create = pfkey_create,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
static int pfkey_seq_show(struct seq_file *f, void *v)
|
|
{
|
|
struct sock *s = sk_entry(v);
|
|
|
|
if (v == SEQ_START_TOKEN)
|
|
seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n");
|
|
else
|
|
seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n",
|
|
s,
|
|
atomic_read(&s->sk_refcnt),
|
|
sk_rmem_alloc_get(s),
|
|
sk_wmem_alloc_get(s),
|
|
from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
|
|
sock_i_ino(s)
|
|
);
|
|
return 0;
|
|
}
|
|
|
|
static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
|
|
__acquires(rcu)
|
|
{
|
|
struct net *net = seq_file_net(f);
|
|
struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
|
|
|
|
rcu_read_lock();
|
|
return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
|
|
}
|
|
|
|
static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
|
|
{
|
|
struct net *net = seq_file_net(f);
|
|
struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
|
|
|
|
return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
|
|
}
|
|
|
|
static void pfkey_seq_stop(struct seq_file *f, void *v)
|
|
__releases(rcu)
|
|
{
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static const struct seq_operations pfkey_seq_ops = {
|
|
.start = pfkey_seq_start,
|
|
.next = pfkey_seq_next,
|
|
.stop = pfkey_seq_stop,
|
|
.show = pfkey_seq_show,
|
|
};
|
|
|
|
static int pfkey_seq_open(struct inode *inode, struct file *file)
|
|
{
|
|
return seq_open_net(inode, file, &pfkey_seq_ops,
|
|
sizeof(struct seq_net_private));
|
|
}
|
|
|
|
static const struct file_operations pfkey_proc_ops = {
|
|
.open = pfkey_seq_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release_net,
|
|
};
|
|
|
|
static int __net_init pfkey_init_proc(struct net *net)
|
|
{
|
|
struct proc_dir_entry *e;
|
|
|
|
e = proc_net_fops_create(net, "pfkey", 0, &pfkey_proc_ops);
|
|
if (e == NULL)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __net_exit pfkey_exit_proc(struct net *net)
|
|
{
|
|
proc_net_remove(net, "pfkey");
|
|
}
|
|
#else
|
|
static inline int pfkey_init_proc(struct net *net)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void pfkey_exit_proc(struct net *net)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
static struct xfrm_mgr pfkeyv2_mgr =
|
|
{
|
|
.id = "pfkeyv2",
|
|
.notify = pfkey_send_notify,
|
|
.acquire = pfkey_send_acquire,
|
|
.compile_policy = pfkey_compile_policy,
|
|
.new_mapping = pfkey_send_new_mapping,
|
|
.notify_policy = pfkey_send_policy_notify,
|
|
.migrate = pfkey_send_migrate,
|
|
};
|
|
|
|
static int __net_init pfkey_net_init(struct net *net)
|
|
{
|
|
struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
|
|
int rv;
|
|
|
|
INIT_HLIST_HEAD(&net_pfkey->table);
|
|
atomic_set(&net_pfkey->socks_nr, 0);
|
|
|
|
rv = pfkey_init_proc(net);
|
|
|
|
return rv;
|
|
}
|
|
|
|
static void __net_exit pfkey_net_exit(struct net *net)
|
|
{
|
|
struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
|
|
|
|
pfkey_exit_proc(net);
|
|
BUG_ON(!hlist_empty(&net_pfkey->table));
|
|
}
|
|
|
|
static struct pernet_operations pfkey_net_ops = {
|
|
.init = pfkey_net_init,
|
|
.exit = pfkey_net_exit,
|
|
.id = &pfkey_net_id,
|
|
.size = sizeof(struct netns_pfkey),
|
|
};
|
|
|
|
static void __exit ipsec_pfkey_exit(void)
|
|
{
|
|
xfrm_unregister_km(&pfkeyv2_mgr);
|
|
sock_unregister(PF_KEY);
|
|
unregister_pernet_subsys(&pfkey_net_ops);
|
|
proto_unregister(&key_proto);
|
|
}
|
|
|
|
static int __init ipsec_pfkey_init(void)
|
|
{
|
|
int err = proto_register(&key_proto, 0);
|
|
|
|
if (err != 0)
|
|
goto out;
|
|
|
|
err = register_pernet_subsys(&pfkey_net_ops);
|
|
if (err != 0)
|
|
goto out_unregister_key_proto;
|
|
err = sock_register(&pfkey_family_ops);
|
|
if (err != 0)
|
|
goto out_unregister_pernet;
|
|
err = xfrm_register_km(&pfkeyv2_mgr);
|
|
if (err != 0)
|
|
goto out_sock_unregister;
|
|
out:
|
|
return err;
|
|
|
|
out_sock_unregister:
|
|
sock_unregister(PF_KEY);
|
|
out_unregister_pernet:
|
|
unregister_pernet_subsys(&pfkey_net_ops);
|
|
out_unregister_key_proto:
|
|
proto_unregister(&key_proto);
|
|
goto out;
|
|
}
|
|
|
|
module_init(ipsec_pfkey_init);
|
|
module_exit(ipsec_pfkey_exit);
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS_NETPROTO(PF_KEY);
|