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-rw-r--r--net/key/af_key.c2903
1 files changed, 2903 insertions, 0 deletions
diff --git a/net/key/af_key.c b/net/key/af_key.c
new file mode 100644
index 0000000..ce980aa
--- /dev/null
+++ b/net/key/af_key.c
@@ -0,0 +1,2903 @@
+/*
+ * net/key/af_key.c An implementation of PF_KEYv2 sockets.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: Maxim Giryaev <gem@asplinux.ru>
+ * David S. Miller <davem@redhat.com>
+ * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
+ * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
+ * Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
+ * Derek Atkins <derek@ihtfp.com>
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/socket.h>
+#include <linux/pfkeyv2.h>
+#include <linux/ipsec.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/proc_fs.h>
+#include <linux/init.h>
+#include <net/xfrm.h>
+
+#include <net/sock.h>
+
+#define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
+#define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
+
+
+/* List of all pfkey sockets. */
+static HLIST_HEAD(pfkey_table);
+static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
+static DEFINE_RWLOCK(pfkey_table_lock);
+static atomic_t pfkey_table_users = ATOMIC_INIT(0);
+
+static atomic_t pfkey_socks_nr = ATOMIC_INIT(0);
+
+struct pfkey_sock {
+ /* struct sock must be the first member of struct pfkey_sock */
+ struct sock sk;
+ int registered;
+ int promisc;
+};
+
+static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
+{
+ return (struct pfkey_sock *)sk;
+}
+
+static void pfkey_sock_destruct(struct sock *sk)
+{
+ skb_queue_purge(&sk->sk_receive_queue);
+
+ if (!sock_flag(sk, SOCK_DEAD)) {
+ printk("Attempt to release alive pfkey socket: %p\n", sk);
+ return;
+ }
+
+ BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
+ BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
+
+ atomic_dec(&pfkey_socks_nr);
+}
+
+static void pfkey_table_grab(void)
+{
+ write_lock_bh(&pfkey_table_lock);
+
+ if (atomic_read(&pfkey_table_users)) {
+ DECLARE_WAITQUEUE(wait, current);
+
+ add_wait_queue_exclusive(&pfkey_table_wait, &wait);
+ for(;;) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ if (atomic_read(&pfkey_table_users) == 0)
+ break;
+ write_unlock_bh(&pfkey_table_lock);
+ schedule();
+ write_lock_bh(&pfkey_table_lock);
+ }
+
+ __set_current_state(TASK_RUNNING);
+ remove_wait_queue(&pfkey_table_wait, &wait);
+ }
+}
+
+static __inline__ void pfkey_table_ungrab(void)
+{
+ write_unlock_bh(&pfkey_table_lock);
+ wake_up(&pfkey_table_wait);
+}
+
+static __inline__ void pfkey_lock_table(void)
+{
+ /* read_lock() synchronizes us to pfkey_table_grab */
+
+ read_lock(&pfkey_table_lock);
+ atomic_inc(&pfkey_table_users);
+ read_unlock(&pfkey_table_lock);
+}
+
+static __inline__ void pfkey_unlock_table(void)
+{
+ if (atomic_dec_and_test(&pfkey_table_users))
+ wake_up(&pfkey_table_wait);
+}
+
+
+static struct proto_ops pfkey_ops;
+
+static void pfkey_insert(struct sock *sk)
+{
+ pfkey_table_grab();
+ sk_add_node(sk, &pfkey_table);
+ pfkey_table_ungrab();
+}
+
+static void pfkey_remove(struct sock *sk)
+{
+ pfkey_table_grab();
+ sk_del_node_init(sk);
+ pfkey_table_ungrab();
+}
+
+static struct proto key_proto = {
+ .name = "KEY",
+ .owner = THIS_MODULE,
+ .obj_size = sizeof(struct pfkey_sock),
+};
+
+static int pfkey_create(struct socket *sock, int protocol)
+{
+ struct sock *sk;
+ int err;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ if (sock->type != SOCK_RAW)
+ return -ESOCKTNOSUPPORT;
+ if (protocol != PF_KEY_V2)
+ return -EPROTONOSUPPORT;
+
+ err = -ENOMEM;
+ sk = sk_alloc(PF_KEY, GFP_KERNEL, &key_proto, 1);
+ if (sk == NULL)
+ goto out;
+
+ sock->ops = &pfkey_ops;
+ sock_init_data(sock, sk);
+
+ sk->sk_family = PF_KEY;
+ sk->sk_destruct = pfkey_sock_destruct;
+
+ atomic_inc(&pfkey_socks_nr);
+
+ pfkey_insert(sk);
+
+ return 0;
+out:
+ return err;
+}
+
+static int pfkey_release(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+
+ if (!sk)
+ return 0;
+
+ pfkey_remove(sk);
+
+ sock_orphan(sk);
+ sock->sk = NULL;
+ skb_queue_purge(&sk->sk_write_queue);
+ sock_put(sk);
+
+ return 0;
+}
+
+static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
+ int allocation, struct sock *sk)
+{
+ int err = -ENOBUFS;
+
+ sock_hold(sk);
+ if (*skb2 == NULL) {
+ if (atomic_read(&skb->users) != 1) {
+ *skb2 = skb_clone(skb, allocation);
+ } else {
+ *skb2 = skb;
+ atomic_inc(&skb->users);
+ }
+ }
+ if (*skb2 != NULL) {
+ if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
+ skb_orphan(*skb2);
+ skb_set_owner_r(*skb2, sk);
+ skb_queue_tail(&sk->sk_receive_queue, *skb2);
+ sk->sk_data_ready(sk, (*skb2)->len);
+ *skb2 = NULL;
+ err = 0;
+ }
+ }
+ sock_put(sk);
+ return err;
+}
+
+/* Send SKB to all pfkey sockets matching selected criteria. */
+#define BROADCAST_ALL 0
+#define BROADCAST_ONE 1
+#define BROADCAST_REGISTERED 2
+#define BROADCAST_PROMISC_ONLY 4
+static int pfkey_broadcast(struct sk_buff *skb, int allocation,
+ int broadcast_flags, struct sock *one_sk)
+{
+ struct sock *sk;
+ struct hlist_node *node;
+ struct sk_buff *skb2 = NULL;
+ int err = -ESRCH;
+
+ /* XXX Do we need something like netlink_overrun? I think
+ * XXX PF_KEY socket apps will not mind current behavior.
+ */
+ if (!skb)
+ return -ENOMEM;
+
+ pfkey_lock_table();
+ sk_for_each(sk, node, &pfkey_table) {
+ struct pfkey_sock *pfk = pfkey_sk(sk);
+ int err2;
+
+ /* Yes, it means that if you are meant to receive this
+ * pfkey message you receive it twice as promiscuous
+ * socket.
+ */
+ if (pfk->promisc)
+ pfkey_broadcast_one(skb, &skb2, allocation, sk);
+
+ /* the exact target will be processed later */
+ if (sk == one_sk)
+ continue;
+ if (broadcast_flags != BROADCAST_ALL) {
+ if (broadcast_flags & BROADCAST_PROMISC_ONLY)
+ continue;
+ if ((broadcast_flags & BROADCAST_REGISTERED) &&
+ !pfk->registered)
+ continue;
+ if (broadcast_flags & BROADCAST_ONE)
+ continue;
+ }
+
+ err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
+
+ /* Error is cleare after succecful sending to at least one
+ * registered KM */
+ if ((broadcast_flags & BROADCAST_REGISTERED) && err)
+ err = err2;
+ }
+ pfkey_unlock_table();
+
+ if (one_sk != NULL)
+ err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
+
+ if (skb2)
+ kfree_skb(skb2);
+ kfree_skb(skb);
+ return err;
+}
+
+static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
+{
+ *new = *orig;
+}
+
+static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
+{
+ struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
+ struct sadb_msg *hdr;
+
+ if (!skb)
+ return -ENOBUFS;
+
+ /* Woe be to the platform trying to support PFKEY yet
+ * having normal errnos outside the 1-255 range, inclusive.
+ */
+ err = -err;
+ if (err == ERESTARTSYS ||
+ err == ERESTARTNOHAND ||
+ err == ERESTARTNOINTR)
+ err = EINTR;
+ if (err >= 512)
+ err = EINVAL;
+ if (err <= 0 || err >= 256)
+ BUG();
+
+ hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
+ pfkey_hdr_dup(hdr, orig);
+ hdr->sadb_msg_errno = (uint8_t) err;
+ hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
+ sizeof(uint64_t));
+
+ pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
+
+ return 0;
+}
+
+static u8 sadb_ext_min_len[] = {
+ [SADB_EXT_RESERVED] = (u8) 0,
+ [SADB_EXT_SA] = (u8) sizeof(struct sadb_sa),
+ [SADB_EXT_LIFETIME_CURRENT] = (u8) sizeof(struct sadb_lifetime),
+ [SADB_EXT_LIFETIME_HARD] = (u8) sizeof(struct sadb_lifetime),
+ [SADB_EXT_LIFETIME_SOFT] = (u8) sizeof(struct sadb_lifetime),
+ [SADB_EXT_ADDRESS_SRC] = (u8) sizeof(struct sadb_address),
+ [SADB_EXT_ADDRESS_DST] = (u8) sizeof(struct sadb_address),
+ [SADB_EXT_ADDRESS_PROXY] = (u8) sizeof(struct sadb_address),
+ [SADB_EXT_KEY_AUTH] = (u8) sizeof(struct sadb_key),
+ [SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
+ [SADB_EXT_IDENTITY_SRC] = (u8) sizeof(struct sadb_ident),
+ [SADB_EXT_IDENTITY_DST] = (u8) sizeof(struct sadb_ident),
+ [SADB_EXT_SENSITIVITY] = (u8) sizeof(struct sadb_sens),
+ [SADB_EXT_PROPOSAL] = (u8) sizeof(struct sadb_prop),
+ [SADB_EXT_SUPPORTED_AUTH] = (u8) sizeof(struct sadb_supported),
+ [SADB_EXT_SUPPORTED_ENCRYPT] = (u8) sizeof(struct sadb_supported),
+ [SADB_EXT_SPIRANGE] = (u8) sizeof(struct sadb_spirange),
+ [SADB_X_EXT_KMPRIVATE] = (u8) sizeof(struct sadb_x_kmprivate),
+ [SADB_X_EXT_POLICY] = (u8) sizeof(struct sadb_x_policy),
+ [SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
+ [SADB_X_EXT_NAT_T_TYPE] = (u8) sizeof(struct sadb_x_nat_t_type),
+ [SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
+ [SADB_X_EXT_NAT_T_DPORT] = (u8) sizeof(struct sadb_x_nat_t_port),
+ [SADB_X_EXT_NAT_T_OA] = (u8) sizeof(struct sadb_address),
+};
+
+/* Verify sadb_address_{len,prefixlen} against sa_family. */
+static int verify_address_len(void *p)
+{
+ struct sadb_address *sp = p;
+ struct sockaddr *addr = (struct sockaddr *)(sp + 1);
+ struct sockaddr_in *sin;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ struct sockaddr_in6 *sin6;
+#endif
+ int len;
+
+ switch (addr->sa_family) {
+ case AF_INET:
+ len = sizeof(*sp) + sizeof(*sin) + (sizeof(uint64_t) - 1);
+ len /= sizeof(uint64_t);
+ if (sp->sadb_address_len != len ||
+ sp->sadb_address_prefixlen > 32)
+ return -EINVAL;
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6:
+ len = sizeof(*sp) + sizeof(*sin6) + (sizeof(uint64_t) - 1);
+ len /= sizeof(uint64_t);
+ if (sp->sadb_address_len != len ||
+ sp->sadb_address_prefixlen > 128)
+ return -EINVAL;
+ break;
+#endif
+ default:
+ /* It is user using kernel to keep track of security
+ * associations for another protocol, such as
+ * OSPF/RSVP/RIPV2/MIP. It is user's job to verify
+ * lengths.
+ *
+ * XXX Actually, association/policy database is not yet
+ * XXX able to cope with arbitrary sockaddr families.
+ * XXX When it can, remove this -EINVAL. -DaveM
+ */
+ return -EINVAL;
+ break;
+ };
+
+ return 0;
+}
+
+static int present_and_same_family(struct sadb_address *src,
+ struct sadb_address *dst)
+{
+ struct sockaddr *s_addr, *d_addr;
+
+ if (!src || !dst)
+ return 0;
+
+ s_addr = (struct sockaddr *)(src + 1);
+ d_addr = (struct sockaddr *)(dst + 1);
+ if (s_addr->sa_family != d_addr->sa_family)
+ return 0;
+ if (s_addr->sa_family != AF_INET
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ && s_addr->sa_family != AF_INET6
+#endif
+ )
+ return 0;
+
+ return 1;
+}
+
+static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+ char *p = (char *) hdr;
+ int len = skb->len;
+
+ len -= sizeof(*hdr);
+ p += sizeof(*hdr);
+ while (len > 0) {
+ struct sadb_ext *ehdr = (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;
+ }
+ ext_hdrs[ext_type-1] = 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 int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
+ xfrm_address_t *xaddr)
+{
+ switch (((struct sockaddr*)(addr + 1))->sa_family) {
+ case AF_INET:
+ xaddr->a4 =
+ ((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
+ return AF_INET;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6:
+ memcpy(xaddr->a6,
+ &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
+ sizeof(struct in6_addr));
+ return AF_INET6;
+#endif
+ default:
+ return 0;
+ }
+ /* NOTREACHED */
+}
+
+static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
+{
+ struct sadb_sa *sa;
+ struct sadb_address *addr;
+ uint16_t proto;
+ unsigned short family;
+ xfrm_address_t *xaddr;
+
+ sa = (struct sadb_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 = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
+ if (addr == NULL)
+ return NULL;
+
+ family = ((struct sockaddr *)(addr + 1))->sa_family;
+ switch (family) {
+ case AF_INET:
+ xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6:
+ xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
+ break;
+#endif
+ default:
+ xaddr = NULL;
+ }
+
+ if (!xaddr)
+ return NULL;
+
+ return xfrm_state_lookup(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)
+{
+ switch (family) {
+ case AF_INET:
+ return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6:
+ return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
+#endif
+ default:
+ return 0;
+ }
+ /* NOTREACHED */
+}
+
+static struct sk_buff * pfkey_xfrm_state2msg(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 sockaddr_in *sin;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ struct sockaddr_in6 *sin6;
+#endif
+ int size;
+ int auth_key_size = 0;
+ int encrypt_key_size = 0;
+ int sockaddr_size;
+ struct xfrm_encap_tmpl *natt = NULL;
+
+ /* 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);
+ /* identity & sensitivity */
+
+ if ((x->props.family == AF_INET &&
+ x->sel.saddr.a4 != x->props.saddr.a4)
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ || (x->props.family == AF_INET6 &&
+ memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
+#endif
+ )
+ 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;
+ sa->sadb_sa_state = SADB_SASTATE_DYING;
+ if (x->km.state == XFRM_STATE_VALID && !x->km.dying)
+ sa->sadb_sa_state = SADB_SASTATE_MATURE;
+ else if (x->km.state == XFRM_STATE_ACQ)
+ sa->sadb_sa_state = SADB_SASTATE_LARVAL;
+ else if (x->km.state == XFRM_STATE_EXPIRED)
+ sa->sadb_sa_state = SADB_SASTATE_DEAD;
+ 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;
+
+ /* 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;
+ if (x->props.family == AF_INET) {
+ addr->sadb_address_prefixlen = 32;
+
+ sin = (struct sockaddr_in *) (addr + 1);
+ sin->sin_family = AF_INET;
+ sin->sin_addr.s_addr = x->props.saddr.a4;
+ sin->sin_port = 0;
+ memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+ }
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ else if (x->props.family == AF_INET6) {
+ addr->sadb_address_prefixlen = 128;
+
+ sin6 = (struct sockaddr_in6 *) (addr + 1);
+ sin6->sin6_family = AF_INET6;
+ sin6->sin6_port = 0;
+ sin6->sin6_flowinfo = 0;
+ memcpy(&sin6->sin6_addr, x->props.saddr.a6,
+ sizeof(struct in6_addr));
+ sin6->sin6_scope_id = 0;
+ }
+#endif
+ else
+ 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_prefixlen = 32; /* XXX */
+ addr->sadb_address_reserved = 0;
+ if (x->props.family == AF_INET) {
+ sin = (struct sockaddr_in *) (addr + 1);
+ sin->sin_family = AF_INET;
+ sin->sin_addr.s_addr = x->id.daddr.a4;
+ sin->sin_port = 0;
+ memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+
+ if (x->sel.saddr.a4 != x->props.saddr.a4) {
+ 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;
+
+ sin = (struct sockaddr_in *) (addr + 1);
+ sin->sin_family = AF_INET;
+ sin->sin_addr.s_addr = x->sel.saddr.a4;
+ sin->sin_port = x->sel.sport;
+ memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+ }
+ }
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ else if (x->props.family == AF_INET6) {
+ addr->sadb_address_prefixlen = 128;
+
+ sin6 = (struct sockaddr_in6 *) (addr + 1);
+ sin6->sin6_family = AF_INET6;
+ sin6->sin6_port = 0;
+ sin6->sin6_flowinfo = 0;
+ memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
+ sin6->sin6_scope_id = 0;
+
+ if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
+ sizeof(struct in6_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_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;
+
+ sin6 = (struct sockaddr_in6 *) (addr + 1);
+ sin6->sin6_family = AF_INET6;
+ sin6->sin6_port = x->sel.sport;
+ sin6->sin6_flowinfo = 0;
+ memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
+ sizeof(struct in6_addr));
+ sin6->sin6_scope_id = 0;
+ }
+ }
+#endif
+ else
+ BUG();
+
+ /* 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;
+ sa2->sadb_x_sa2_mode = x->props.mode + 1;
+ 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;
+ }
+
+ return skb;
+}
+
+static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
+ void **ext_hdrs)
+{
+ struct xfrm_state *x;
+ struct sadb_lifetime *lifetime;
+ struct sadb_sa *sa;
+ struct sadb_key *key;
+ uint16_t proto;
+ int err;
+
+
+ sa = (struct sadb_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 = (struct sadb_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();
+ 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;
+
+ lifetime = (struct sadb_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 = (struct sadb_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;
+ }
+ key = (struct sadb_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->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]) {
+ struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
+ x->props.mode = sa2->sadb_x_sa2_mode;
+ if (x->props.mode)
+ x->props.mode--;
+ x->props.reqid = sa2->sadb_x_sa2_reqid;
+ }
+
+ if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
+ 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 (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
+ 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]) {
+ 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]) {
+ 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;
+ }
+ }
+
+ x->type = xfrm_get_type(proto, x->props.family);
+ if (x->type == NULL) {
+ err = -ENOPROTOOPT;
+ goto out;
+ }
+ if (x->type->init_state(x, NULL)) {
+ err = -EINVAL;
+ goto out;
+ }
+ x->km.seq = hdr->sadb_msg_seq;
+ x->km.state = XFRM_STATE_VALID;
+ 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, struct sadb_msg *hdr, void **ext_hdrs)
+{
+ return -EOPNOTSUPP;
+}
+
+static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+ struct sk_buff *resp_skb;
+ struct sadb_x_sa2 *sa2;
+ struct sadb_address *saddr, *daddr;
+ struct sadb_msg *out_hdr;
+ struct xfrm_state *x = NULL;
+ u8 mode;
+ 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 = sa2->sadb_x_sa2_mode - 1;
+ 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 defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ 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(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(mode, reqid, proto, xdaddr, xsaddr, 1, family);
+
+ if (x == NULL)
+ return -ENOENT;
+
+ resp_skb = ERR_PTR(-ENOENT);
+
+ spin_lock_bh(&x->lock);
+ if (x->km.state != XFRM_STATE_DEAD) {
+ struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1];
+ u32 min_spi, max_spi;
+
+ if (range != NULL) {
+ min_spi = range->sadb_spirange_min;
+ max_spi = range->sadb_spirange_max;
+ } else {
+ min_spi = 0x100;
+ max_spi = 0x0fffffff;
+ }
+ xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi));
+ if (x->id.spi)
+ resp_skb = pfkey_xfrm_state2msg(x, 0, 3);
+ }
+ spin_unlock_bh(&x->lock);
+
+ 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);
+
+ return 0;
+}
+
+static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+ 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(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(&km_waitq);
+ }
+ spin_unlock_bh(&x->lock);
+ xfrm_state_put(x);
+ return 0;
+}
+
+
+static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+ struct sk_buff *out_skb;
+ struct sadb_msg *out_hdr;
+ struct xfrm_state *x;
+ int err;
+
+ xfrm_probe_algs();
+
+ x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
+ if (IS_ERR(x))
+ return PTR_ERR(x);
+
+ if (hdr->sadb_msg_type == SADB_ADD)
+ err = xfrm_state_add(x);
+ else
+ err = xfrm_state_update(x);
+
+ if (err < 0) {
+ x->km.state = XFRM_STATE_DEAD;
+ xfrm_state_put(x);
+ return err;
+ }
+
+ out_skb = pfkey_xfrm_state2msg(x, 0, 3);
+ if (IS_ERR(out_skb))
+ return PTR_ERR(out_skb); /* XXX Should we return 0 here ? */
+
+ 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 = pfkey_proto2satype(x->id.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_ALL, sk);
+
+ return 0;
+}
+
+static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+ 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(hdr, ext_hdrs);
+ if (x == NULL)
+ return -ESRCH;
+
+ if (xfrm_state_kern(x)) {
+ xfrm_state_put(x);
+ return -EPERM;
+ }
+
+ xfrm_state_delete(x);
+ xfrm_state_put(x);
+
+ pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
+ BROADCAST_ALL, sk);
+
+ return 0;
+}
+
+static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+ __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(hdr, ext_hdrs);
+ if (x == NULL)
+ return -ESRCH;
+
+ out_skb = pfkey_xfrm_state2msg(x, 1, 3);
+ 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_DUMP;
+ 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);
+
+ return 0;
+}
+
+static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig, int 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, struct sadb_msg *hdr, void **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);
+
+ return 0;
+}
+
+static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+ unsigned proto;
+ struct sk_buff *skb_out;
+ struct sadb_msg *hdr_out;
+
+ proto = pfkey_satype2proto(hdr->sadb_msg_satype);
+ if (proto == 0)
+ return -EINVAL;
+
+ skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
+ if (!skb_out)
+ return -ENOBUFS;
+
+ xfrm_state_flush(proto);
+
+ hdr_out = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
+ pfkey_hdr_dup(hdr_out, hdr);
+ hdr_out->sadb_msg_errno = (uint8_t) 0;
+ hdr_out->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
+
+ pfkey_broadcast(skb_out, GFP_KERNEL, BROADCAST_ALL, NULL);
+
+ return 0;
+}
+
+struct pfkey_dump_data
+{
+ struct sk_buff *skb;
+ struct sadb_msg *hdr;
+ struct sock *sk;
+};
+
+static int dump_sa(struct xfrm_state *x, int count, void *ptr)
+{
+ struct pfkey_dump_data *data = ptr;
+ struct sk_buff *out_skb;
+ struct sadb_msg *out_hdr;
+
+ out_skb = pfkey_xfrm_state2msg(x, 1, 3);
+ if (IS_ERR(out_skb))
+ return PTR_ERR(out_skb);
+
+ out_hdr = (struct sadb_msg *) out_skb->data;
+ out_hdr->sadb_msg_version = data->hdr->sadb_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;
+ out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
+ pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
+ return 0;
+}
+
+static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+ u8 proto;
+ struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
+
+ proto = pfkey_satype2proto(hdr->sadb_msg_satype);
+ if (proto == 0)
+ return -EINVAL;
+
+ return xfrm_state_walk(proto, dump_sa, &data);
+}
+
+static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+ struct pfkey_sock *pfk = pfkey_sk(sk);
+ int satype = hdr->sadb_msg_satype;
+
+ if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
+ /* XXX we mangle packet... */
+ hdr->sadb_msg_errno = 0;
+ if (satype != 0 && satype != 1)
+ return -EINVAL;
+ pfk->promisc = satype;
+ }
+ pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
+ 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(void)
+{
+ u32 start;
+ static u32 reqid = IPSEC_MANUAL_REQID_MAX;
+
+ start = reqid;
+ do {
+ ++reqid;
+ if (reqid == 0)
+ reqid = IPSEC_MANUAL_REQID_MAX+1;
+ if (xfrm_policy_walk(check_reqid, (void*)&reqid) != -EEXIST)
+ return reqid;
+ } while (reqid != start);
+ return 0;
+}
+
+static int
+parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
+{
+ struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
+ struct sockaddr_in *sin;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ struct sockaddr_in6 *sin6;
+#endif
+
+ 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 */
+ t->mode = rq->sadb_x_ipsecrequest_mode-1;
+ 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()))
+ return -ENOBUFS;
+ }
+
+ /* addresses present only in tunnel mode */
+ if (t->mode) {
+ switch (xp->family) {
+ case AF_INET:
+ sin = (void*)(rq+1);
+ if (sin->sin_family != AF_INET)
+ return -EINVAL;
+ t->saddr.a4 = sin->sin_addr.s_addr;
+ sin++;
+ if (sin->sin_family != AF_INET)
+ return -EINVAL;
+ t->id.daddr.a4 = sin->sin_addr.s_addr;
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6:
+ sin6 = (void *)(rq+1);
+ if (sin6->sin6_family != AF_INET6)
+ return -EINVAL;
+ memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
+ sin6++;
+ if (sin6->sin6_family != AF_INET6)
+ return -EINVAL;
+ memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
+ break;
+#endif
+ default:
+ return -EINVAL;
+ }
+ }
+ /* No way to set this via kame pfkey */
+ t->aalgos = t->ealgos = t->calgos = ~0;
+ 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);
+
+ 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 int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
+{
+ int sockaddr_size = pfkey_sockaddr_size(xp->family);
+ int socklen = (xp->family == AF_INET ?
+ sizeof(struct sockaddr_in) :
+ sizeof(struct sockaddr_in6));
+
+ 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)));
+}
+
+static struct sk_buff * pfkey_xfrm_policy2msg_prep(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 void pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
+{
+ struct sadb_msg *hdr;
+ struct sadb_address *addr;
+ struct sadb_lifetime *lifetime;
+ struct sadb_x_policy *pol;
+ struct sockaddr_in *sin;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ struct sockaddr_in6 *sin6;
+#endif
+ int i;
+ int size;
+ int sockaddr_size = pfkey_sockaddr_size(xp->family);
+ int socklen = (xp->family == AF_INET ?
+ sizeof(struct sockaddr_in) :
+ sizeof(struct sockaddr_in6));
+
+ 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;
+ /* src address */
+ if (xp->family == AF_INET) {
+ sin = (struct sockaddr_in *) (addr + 1);
+ sin->sin_family = AF_INET;
+ sin->sin_addr.s_addr = xp->selector.saddr.a4;
+ sin->sin_port = xp->selector.sport;
+ memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+ }
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ else if (xp->family == AF_INET6) {
+ sin6 = (struct sockaddr_in6 *) (addr + 1);
+ sin6->sin6_family = AF_INET6;
+ sin6->sin6_port = xp->selector.sport;
+ sin6->sin6_flowinfo = 0;
+ memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
+ sizeof(struct in6_addr));
+ sin6->sin6_scope_id = 0;
+ }
+#endif
+ else
+ 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;
+ if (xp->family == AF_INET) {
+ sin = (struct sockaddr_in *) (addr + 1);
+ sin->sin_family = AF_INET;
+ sin->sin_addr.s_addr = xp->selector.daddr.a4;
+ sin->sin_port = xp->selector.dport;
+ memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+ }
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ else if (xp->family == AF_INET6) {
+ sin6 = (struct sockaddr_in6 *) (addr + 1);
+ sin6->sin6_family = AF_INET6;
+ sin6->sin6_port = xp->selector.dport;
+ sin6->sin6_flowinfo = 0;
+ memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
+ sizeof(struct in6_addr));
+ sin6->sin6_scope_id = 0;
+ }
+#endif
+ else
+ BUG();
+
+ /* 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++) {
+ struct sadb_x_ipsecrequest *rq;
+ struct xfrm_tmpl *t = xp->xfrm_vec + i;
+ int req_size;
+
+ req_size = sizeof(struct sadb_x_ipsecrequest);
+ if (t->mode)
+ req_size += 2*socklen;
+ 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;
+ rq->sadb_x_ipsecrequest_mode = t->mode+1;
+ 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) {
+ switch (xp->family) {
+ case AF_INET:
+ sin = (void*)(rq+1);
+ sin->sin_family = AF_INET;
+ sin->sin_addr.s_addr = t->saddr.a4;
+ sin->sin_port = 0;
+ memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+ sin++;
+ sin->sin_family = AF_INET;
+ sin->sin_addr.s_addr = t->id.daddr.a4;
+ sin->sin_port = 0;
+ memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6:
+ sin6 = (void*)(rq+1);
+ sin6->sin6_family = AF_INET6;
+ sin6->sin6_port = 0;
+ sin6->sin6_flowinfo = 0;
+ memcpy(&sin6->sin6_addr, t->saddr.a6,
+ sizeof(struct in6_addr));
+ sin6->sin6_scope_id = 0;
+
+ sin6++;
+ sin6->sin6_family = AF_INET6;
+ sin6->sin6_port = 0;
+ sin6->sin6_flowinfo = 0;
+ memcpy(&sin6->sin6_addr, t->id.daddr.a6,
+ sizeof(struct in6_addr));
+ sin6->sin6_scope_id = 0;
+ break;
+#endif
+ default:
+ break;
+ }
+ }
+ }
+ hdr->sadb_msg_len = size / sizeof(uint64_t);
+ hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
+}
+
+static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+ int err;
+ struct sadb_lifetime *lifetime;
+ struct sadb_address *sa;
+ struct sadb_x_policy *pol;
+ struct xfrm_policy *xp;
+ struct sk_buff *out_skb;
+ struct sadb_msg *out_hdr;
+
+ 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(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 = ~0;
+
+ 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 = ~0;
+
+ 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;
+
+ out_skb = pfkey_xfrm_policy2msg_prep(xp);
+ if (IS_ERR(out_skb)) {
+ err = PTR_ERR(out_skb);
+ goto out;
+ }
+
+ err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
+ hdr->sadb_msg_type != SADB_X_SPDUPDATE);
+ if (err) {
+ kfree_skb(out_skb);
+ goto out;
+ }
+
+ pfkey_xfrm_policy2msg(out_skb, xp, pol->sadb_x_policy_dir-1);
+
+ xfrm_pol_put(xp);
+
+ 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_ALL, sk);
+ return 0;
+
+out:
+ kfree(xp);
+ return err;
+}
+
+static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+ int err;
+ struct sadb_address *sa;
+ struct sadb_x_policy *pol;
+ struct xfrm_policy *xp;
+ struct sk_buff *out_skb;
+ struct sadb_msg *out_hdr;
+ struct xfrm_selector sel;
+
+ 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 = ~0;
+
+ 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 = ~0;
+
+ xp = xfrm_policy_bysel(pol->sadb_x_policy_dir-1, &sel, 1);
+ if (xp == NULL)
+ return -ENOENT;
+
+ err = 0;
+
+ out_skb = pfkey_xfrm_policy2msg_prep(xp);
+ if (IS_ERR(out_skb)) {
+ err = PTR_ERR(out_skb);
+ goto out;
+ }
+ pfkey_xfrm_policy2msg(out_skb, xp, pol->sadb_x_policy_dir-1);
+
+ out_hdr = (struct sadb_msg *) out_skb->data;
+ out_hdr->sadb_msg_version = hdr->sadb_msg_version;
+ out_hdr->sadb_msg_type = SADB_X_SPDDELETE;
+ 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_ALL, sk);
+ err = 0;
+
+out:
+ xfrm_pol_put(xp);
+ return err;
+}
+
+static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+ int err;
+ struct sadb_x_policy *pol;
+ struct xfrm_policy *xp;
+ struct sk_buff *out_skb;
+ struct sadb_msg *out_hdr;
+
+ if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
+ return -EINVAL;
+
+ xp = xfrm_policy_byid(0, pol->sadb_x_policy_id,
+ hdr->sadb_msg_type == SADB_X_SPDDELETE2);
+ if (xp == NULL)
+ return -ENOENT;
+
+ err = 0;
+
+ out_skb = pfkey_xfrm_policy2msg_prep(xp);
+ if (IS_ERR(out_skb)) {
+ err = PTR_ERR(out_skb);
+ goto out;
+ }
+ pfkey_xfrm_policy2msg(out_skb, xp, pol->sadb_x_policy_dir-1);
+
+ 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_ALL, sk);
+ err = 0;
+
+out:
+ xfrm_pol_put(xp);
+ return err;
+}
+
+static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
+{
+ struct pfkey_dump_data *data = ptr;
+ struct sk_buff *out_skb;
+ struct sadb_msg *out_hdr;
+
+ out_skb = pfkey_xfrm_policy2msg_prep(xp);
+ if (IS_ERR(out_skb))
+ return PTR_ERR(out_skb);
+
+ pfkey_xfrm_policy2msg(out_skb, xp, dir);
+
+ out_hdr = (struct sadb_msg *) out_skb->data;
+ out_hdr->sadb_msg_version = data->hdr->sadb_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;
+ out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
+ pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
+ return 0;
+}
+
+static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+ struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
+
+ return xfrm_policy_walk(dump_sp, &data);
+}
+
+static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+ struct sk_buff *skb_out;
+ struct sadb_msg *hdr_out;
+
+ skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
+ if (!skb_out)
+ return -ENOBUFS;
+
+ xfrm_policy_flush();
+
+ hdr_out = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
+ pfkey_hdr_dup(hdr_out, hdr);
+ hdr_out->sadb_msg_errno = (uint8_t) 0;
+ hdr_out->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
+ pfkey_broadcast(skb_out, GFP_KERNEL, BROADCAST_ALL, NULL);
+
+ return 0;
+}
+
+typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
+ struct sadb_msg *hdr, void **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,
+};
+
+static int pfkey_process(struct sock *sk, struct sk_buff *skb, 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);
+
+ 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(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
+{
+ return t->aalgos & (1 << d->desc.sadb_alg_id);
+}
+
+static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
+{
+ return t->ealgos & (1 << d->desc.sadb_alg_id);
+}
+
+static int count_ah_combs(struct xfrm_tmpl *t)
+{
+ int i, sz = 0;
+
+ for (i = 0; ; i++) {
+ 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(struct xfrm_tmpl *t)
+{
+ int i, k, sz = 0;
+
+ for (i = 0; ; i++) {
+ 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 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, 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++) {
+ 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, 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++) {
+ 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;
+ 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 pfkey_send_notify(struct xfrm_state *x, int hard)
+{
+ struct sk_buff *out_skb;
+ struct sadb_msg *out_hdr;
+ int hsc = (hard ? 2 : 1);
+
+ out_skb = pfkey_xfrm_state2msg(x, 0, 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);
+ return 0;
+}
+
+static u32 get_acqseq(void)
+{
+ u32 res;
+ static u32 acqseq;
+ static DEFINE_SPINLOCK(acqseq_lock);
+
+ spin_lock_bh(&acqseq_lock);
+ res = (++acqseq ? : ++acqseq);
+ spin_unlock_bh(&acqseq_lock);
+ return res;
+}
+
+static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
+{
+ struct sk_buff *skb;
+ struct sadb_msg *hdr;
+ struct sadb_address *addr;
+ struct sadb_x_policy *pol;
+ struct sockaddr_in *sin;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ struct sockaddr_in6 *sin6;
+#endif
+ int sockaddr_size;
+ int size;
+
+ 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);
+
+ 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;
+ if (x->props.family == AF_INET) {
+ addr->sadb_address_prefixlen = 32;
+
+ sin = (struct sockaddr_in *) (addr + 1);
+ sin->sin_family = AF_INET;
+ sin->sin_addr.s_addr = x->props.saddr.a4;
+ sin->sin_port = 0;
+ memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+ }
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ else if (x->props.family == AF_INET6) {
+ addr->sadb_address_prefixlen = 128;
+
+ sin6 = (struct sockaddr_in6 *) (addr + 1);
+ sin6->sin6_family = AF_INET6;
+ sin6->sin6_port = 0;
+ sin6->sin6_flowinfo = 0;
+ memcpy(&sin6->sin6_addr,
+ x->props.saddr.a6, sizeof(struct in6_addr));
+ sin6->sin6_scope_id = 0;
+ }
+#endif
+ else
+ 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;
+ if (x->props.family == AF_INET) {
+ addr->sadb_address_prefixlen = 32;
+
+ sin = (struct sockaddr_in *) (addr + 1);
+ sin->sin_family = AF_INET;
+ sin->sin_addr.s_addr = x->id.daddr.a4;
+ sin->sin_port = 0;
+ memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+ }
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ else if (x->props.family == AF_INET6) {
+ addr->sadb_address_prefixlen = 128;
+
+ sin6 = (struct sockaddr_in6 *) (addr + 1);
+ sin6->sin6_family = AF_INET6;
+ sin6->sin6_port = 0;
+ sin6->sin6_flowinfo = 0;
+ memcpy(&sin6->sin6_addr,
+ x->id.daddr.a6, sizeof(struct in6_addr));
+ sin6->sin6_scope_id = 0;
+ }
+#endif
+ else
+ 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 = dir+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);
+
+ return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
+}
+
+static struct xfrm_policy *pfkey_compile_policy(u16 family, int opt,
+ u8 *data, int len, int *dir)
+{
+ struct xfrm_policy *xp;
+ struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
+
+ switch (family) {
+ case AF_INET:
+ if (opt != IP_IPSEC_POLICY) {
+ *dir = -EOPNOTSUPP;
+ return NULL;
+ }
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ 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(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 = family;
+
+ xp->xfrm_nr = 0;
+ if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
+ (*dir = parse_ipsecrequests(xp, pol)) < 0)
+ goto out;
+
+ *dir = pol->sadb_x_policy_dir-1;
+ return xp;
+
+out:
+ kfree(xp);
+ return NULL;
+}
+
+static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 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;
+ struct sockaddr_in *sin;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ struct sockaddr_in6 *sin6;
+#endif
+ 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;
+ if (x->props.family == AF_INET) {
+ addr->sadb_address_prefixlen = 32;
+
+ sin = (struct sockaddr_in *) (addr + 1);
+ sin->sin_family = AF_INET;
+ sin->sin_addr.s_addr = x->props.saddr.a4;
+ sin->sin_port = 0;
+ memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+ }
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ else if (x->props.family == AF_INET6) {
+ addr->sadb_address_prefixlen = 128;
+
+ sin6 = (struct sockaddr_in6 *) (addr + 1);
+ sin6->sin6_family = AF_INET6;
+ sin6->sin6_port = 0;
+ sin6->sin6_flowinfo = 0;
+ memcpy(&sin6->sin6_addr,
+ x->props.saddr.a6, sizeof(struct in6_addr));
+ sin6->sin6_scope_id = 0;
+ }
+#endif
+ else
+ 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;
+ if (x->props.family == AF_INET) {
+ addr->sadb_address_prefixlen = 32;
+
+ sin = (struct sockaddr_in *) (addr + 1);
+ sin->sin_family = AF_INET;
+ sin->sin_addr.s_addr = ipaddr->a4;
+ sin->sin_port = 0;
+ memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+ }
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ else if (x->props.family == AF_INET6) {
+ addr->sadb_address_prefixlen = 128;
+
+ sin6 = (struct sockaddr_in6 *) (addr + 1);
+ sin6->sin6_family = AF_INET6;
+ sin6->sin6_port = 0;
+ sin6->sin6_flowinfo = 0;
+ memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
+ sin6->sin6_scope_id = 0;
+ }
+#endif
+ else
+ 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);
+}
+
+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)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;
+
+ down(&xfrm_cfg_sem);
+ err = pfkey_process(sk, skb, hdr);
+ up(&xfrm_cfg_sem);
+
+out:
+ if (err && hdr && pfkey_error(hdr, err, sk) == 0)
+ err = 0;
+ if (skb)
+ 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 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->h.raw = skb->data;
+ err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+ if (err)
+ goto out_free;
+
+ sock_recv_timestamp(msg, sk, skb);
+
+ err = (flags & MSG_TRUNC) ? skb->len : copied;
+
+out_free:
+ skb_free_datagram(sk, skb);
+out:
+ return err;
+}
+
+static 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 struct net_proto_family pfkey_family_ops = {
+ .family = PF_KEY,
+ .create = pfkey_create,
+ .owner = THIS_MODULE,
+};
+
+#ifdef CONFIG_PROC_FS
+static int pfkey_read_proc(char *buffer, char **start, off_t offset,
+ int length, int *eof, void *data)
+{
+ off_t pos = 0;
+ off_t begin = 0;
+ int len = 0;
+ struct sock *s;
+ struct hlist_node *node;
+
+ len += sprintf(buffer,"sk RefCnt Rmem Wmem User Inode\n");
+
+ read_lock(&pfkey_table_lock);
+
+ sk_for_each(s, node, &pfkey_table) {
+ len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
+ s,
+ atomic_read(&s->sk_refcnt),
+ atomic_read(&s->sk_rmem_alloc),
+ atomic_read(&s->sk_wmem_alloc),
+ sock_i_uid(s),
+ sock_i_ino(s)
+ );
+
+ buffer[len++] = '\n';
+
+ pos = begin + len;
+ if (pos < offset) {
+ len = 0;
+ begin = pos;
+ }
+ if(pos > offset + length)
+ goto done;
+ }
+ *eof = 1;
+
+done:
+ read_unlock(&pfkey_table_lock);
+
+ *start = buffer + (offset - begin);
+ len -= (offset - begin);
+
+ if (len > length)
+ len = length;
+ if (len < 0)
+ len = 0;
+
+ return len;
+}
+#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,
+};
+
+static void __exit ipsec_pfkey_exit(void)
+{
+ xfrm_unregister_km(&pfkeyv2_mgr);
+ remove_proc_entry("net/pfkey", NULL);
+ sock_unregister(PF_KEY);
+ proto_unregister(&key_proto);
+}
+
+static int __init ipsec_pfkey_init(void)
+{
+ int err = proto_register(&key_proto, 0);
+
+ if (err != 0)
+ goto out;
+
+ err = sock_register(&pfkey_family_ops);
+ if (err != 0)
+ goto out_unregister_key_proto;
+#ifdef CONFIG_PROC_FS
+ err = -ENOMEM;
+ if (create_proc_read_entry("net/pfkey", 0, NULL, pfkey_read_proc, NULL) == NULL)
+ goto out_sock_unregister;
+#endif
+ err = xfrm_register_km(&pfkeyv2_mgr);
+ if (err != 0)
+ goto out_remove_proc_entry;
+out:
+ return err;
+out_remove_proc_entry:
+#ifdef CONFIG_PROC_FS
+ remove_proc_entry("net/pfkey", NULL);
+out_sock_unregister:
+#endif
+ sock_unregister(PF_KEY);
+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);
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