--- /dev/null
+/*
+ * 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/capability.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 <linux/slab.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.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))
+
+static int pfkey_net_id __read_mostly;
+struct netns_pfkey {
+ /* List of all pfkey sockets. */
+ struct hlist_head table;
+ atomic_t socks_nr;
+};
+static DEFINE_MUTEX(pfkey_mutex);
+
+#define DUMMY_MARK 0
+static const struct xfrm_mark dummy_mark = {0, 0};
+struct pfkey_sock {
+ /* struct sock must be the first member of struct pfkey_sock */
+ struct sock sk;
+ int registered;
+ int promisc;
+
+ struct {
+ uint8_t msg_version;
+ uint32_t msg_portid;
+ int (*dump)(struct pfkey_sock *sk);
+ void (*done)(struct pfkey_sock *sk);
+ union {
+ struct xfrm_policy_walk policy;
+ struct xfrm_state_walk state;
+ } u;
+ struct sk_buff *skb;
+ } dump;
+};
+
+static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
+{
+ return (struct pfkey_sock *)sk;
+}
+
+static int pfkey_can_dump(const struct sock *sk)
+{
+ if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
+ return 1;
+ return 0;
+}
+
+static void pfkey_terminate_dump(struct pfkey_sock *pfk)
+{
+ if (pfk->dump.dump) {
+ if (pfk->dump.skb) {
+ kfree_skb(pfk->dump.skb);
+ pfk->dump.skb = NULL;
+ }
+ pfk->dump.done(pfk);
+ pfk->dump.dump = NULL;
+ pfk->dump.done = NULL;
+ }
+}
+
+static void pfkey_sock_destruct(struct sock *sk)
+{
+ struct net *net = sock_net(sk);
+ struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
+
+ pfkey_terminate_dump(pfkey_sk(sk));
+ skb_queue_purge(&sk->sk_receive_queue);
+
+ if (!sock_flag(sk, SOCK_DEAD)) {
+ pr_err("Attempt to release alive pfkey socket: %p\n", sk);
+ return;
+ }
+
+ WARN_ON(atomic_read(&sk->sk_rmem_alloc));
+ WARN_ON(atomic_read(&sk->sk_wmem_alloc));
+
+ atomic_dec(&net_pfkey->socks_nr);
+}
+
+static const struct proto_ops pfkey_ops;
+
+static void pfkey_insert(struct sock *sk)
+{
+ struct net *net = sock_net(sk);
+ struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
+
+ mutex_lock(&pfkey_mutex);
+ sk_add_node_rcu(sk, &net_pfkey->table);
+ mutex_unlock(&pfkey_mutex);
+}
+
+static void pfkey_remove(struct sock *sk)
+{
+ mutex_lock(&pfkey_mutex);
+ sk_del_node_init_rcu(sk);
+ mutex_unlock(&pfkey_mutex);
+}
+
+static struct proto key_proto = {
+ .name = "KEY",
+ .owner = THIS_MODULE,
+ .obj_size = sizeof(struct pfkey_sock),
+};
+
+static int pfkey_create(struct net *net, struct socket *sock, int protocol,
+ int kern)
+{
+ struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
+ struct sock *sk;
+ int err;
+
+ if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
+ return -EPERM;
+ if (sock->type != SOCK_RAW)
+ return -ESOCKTNOSUPPORT;
+ if (protocol != PF_KEY_V2)
+ return -EPROTONOSUPPORT;
+
+ err = -ENOMEM;
+ sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
+ 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(&net_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);
+
+ synchronize_rcu();
+ sock_put(sk);
+
+ return 0;
+}
+
+static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
+ gfp_t 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_set_owner_r(*skb2, sk);
+ skb_queue_tail(&sk->sk_receive_queue, *skb2);
+ sk->sk_data_ready(sk);
+ *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, gfp_t allocation,
+ int broadcast_flags, struct sock *one_sk,
+ struct net *net)
+{
+ struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
+ struct sock *sk;
+ 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;
+
+ rcu_read_lock();
+ sk_for_each_rcu(sk, &net_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;
+ }
+ rcu_read_unlock();
+
+ if (one_sk != NULL)
+ err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
+
+ kfree_skb(skb2);
+ kfree_skb(skb);
+ return err;
+}
+
+static int pfkey_do_dump(struct pfkey_sock *pfk)
+{
+ struct sadb_msg *hdr;
+ int rc;
+
+ rc = pfk->dump.dump(pfk);
+ if (rc == -ENOBUFS)
+ return 0;
+
+ if (pfk->dump.skb) {
+ if (!pfkey_can_dump(&pfk->sk))
+ return 0;
+
+ hdr = (struct sadb_msg *) pfk->dump.skb->data;
+ hdr->sadb_msg_seq = 0;
+ hdr->sadb_msg_errno = rc;
+ pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
+ &pfk->sk, sock_net(&pfk->sk));
+ pfk->dump.skb = NULL;
+ }
+
+ pfkey_terminate_dump(pfk);
+ return rc;
+}
+
+static inline void pfkey_hdr_dup(struct sadb_msg *new,
+ const struct sadb_msg *orig)
+{
+ *new = *orig;
+}
+
+static int pfkey_error(const 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;
+ BUG_ON(err <= 0 || err >= 256);
+
+ 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, sock_net(sk));
+
+ return 0;
+}
+
+static const 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),
+ [SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx),
+ [SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress),
+ [SADB_X_EXT_FILTER] = (u8) sizeof(struct sadb_x_filter),
+};
+
+/* Verify sadb_address_{len,prefixlen} against sa_family. */
+static int verify_address_len(const void *p)
+{
+ const struct sadb_address *sp = p;
+ const struct sockaddr *addr = (const struct sockaddr *)(sp + 1);
+ const struct sockaddr_in *sin;
+#if IS_ENABLED(CONFIG_IPV6)
+ const struct sockaddr_in6 *sin6;
+#endif
+ int len;
+
+ switch (addr->sa_family) {
+ case AF_INET:
+ len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
+ if (sp->sadb_address_len != len ||
+ sp->sadb_address_prefixlen > 32)
+ return -EINVAL;
+ break;
+#if IS_ENABLED(CONFIG_IPV6)
+ case AF_INET6:
+ len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), 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;
+ }
+
+ return 0;
+}
+
+static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx)
+{
+ return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
+ sec_ctx->sadb_x_ctx_len,
+ sizeof(uint64_t));
+}
+
+static inline int verify_sec_ctx_len(const void *p)
+{
+ const struct sadb_x_sec_ctx *sec_ctx = p;
+ int len = sec_ctx->sadb_x_ctx_len;
+
+ if (len > PAGE_SIZE)
+ return -EINVAL;
+
+ len = pfkey_sec_ctx_len(sec_ctx);
+
+ if (sec_ctx->sadb_x_sec_len != len)
+ return -EINVAL;
+
+ return 0;
+}
+
+static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx,
+ gfp_t gfp)
+{
+ struct xfrm_user_sec_ctx *uctx = NULL;
+ int ctx_size = sec_ctx->sadb_x_ctx_len;
+
+ uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp);
+
+ 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;
+ 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;
+ 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 = xaddr->in6;
+ 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_equal(&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->pfkey_supported) ?
+ 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->pfkey_supported) ?
+ 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->pfkey_supported) ?
+ 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_equal(&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 = min_t(unsigned int, sa->sadb_sa_replay,
+ (sizeof(x->replay.bitmap) * 8));
+ 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, GFP_KERNEL);
+
+ 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 || !a->pfkey_supported) {
+ 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 || !a->pfkey_supported) {
+ 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 || !a->pfkey_supported) {
+ 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);
+ 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_equal(&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 = verify_spi_info(x->id.proto, min_spi, max_spi);
+ if (err) {
+ xfrm_state_put(x);
+ return err;
+ }
+
+ 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;
+
+ 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, true);
+
+ 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, true);
+ 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_pfkey_auth_supported();
+ if (auth_len) {
+ auth_len *= sizeof(struct sadb_alg);
+ auth_len += sizeof(struct sadb_supported);
+ }
+
+ enc_len = xfrm_count_pfkey_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->pfkey_supported)
+ continue;
+ 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->pfkey_supported)
+ continue;
+ 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));
+ hdr->sadb_msg_reserved = 0;
+
+ 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;
+ int err, err2;
+
+ proto = pfkey_satype2proto(hdr->sadb_msg_satype);
+ if (proto == 0)
+ return -EINVAL;
+
+ err = xfrm_state_flush(net, proto, true);
+ 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)
+{
+ struct net *net = sock_net(&pfk->sk);
+
+ xfrm_state_walk_done(&pfk->dump.u.state, net);
+}
+
+static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
+{
+ u8 proto;
+ struct xfrm_address_filter *filter = NULL;
+ 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;
+
+ if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
+ struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
+
+ filter = kmalloc(sizeof(*filter), GFP_KERNEL);
+ if (filter == NULL)
+ return -ENOMEM;
+
+ memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
+ sizeof(xfrm_address_t));
+ memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
+ sizeof(xfrm_address_t));
+ filter->family = xfilter->sadb_x_filter_family;
+ filter->splen = xfilter->sadb_x_filter_splen;
+ filter->dplen = xfilter->sadb_x_filter_dplen;
+ }
+
+ 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, filter);
+
+ 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, net);
+ 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_reserved = 0;
+ 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);
+ 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, GFP_KERNEL);
+
+ if (!uctx) {
+ err = -ENOBUFS;
+ goto out;
+ }
+
+ err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL);
+ 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, true);
+
+ 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, GFP_KERNEL);
+
+ if (!uctx)
+ return -ENOMEM;
+
+ err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
+ 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, true);
+
+ 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);
+ if (err == 0)
+ xfrm_garbage_collect(net);
+ 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;
+ struct net *net = sock_net(sk);
+
+ 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, net);
+
+ 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, true);
+
+ 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);
+ if (delete && err == 0)
+ xfrm_garbage_collect(net);
+ 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)
+{
+ struct net *net = sock_net((struct sock *)pfk);
+
+ xfrm_policy_walk_done(&pfk->dump.u.policy, net);
+}
+
+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_satype = SADB_SATYPE_UNSPEC;
+ hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
+ hdr->sadb_msg_reserved = 0;
+ 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;
+ int err, err2;
+
+ err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true);
+ 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 const 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->pfkey_supported)
+ continue;
+ 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->pfkey_supported)
+ continue;
+
+ 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->pfkey_supported)
+ continue;
+
+ 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->pfkey_supported)
+ continue;
+
+ 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->pfkey_supported)
+ continue;
+
+ 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->pfkey_supported)
+ continue;
+ 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 bool pfkey_is_alive(const struct km_event *c)
+{
+ struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id);
+ struct sock *sk;
+ bool is_alive = false;
+
+ rcu_read_lock();
+ sk_for_each_rcu(sk, &net_pfkey->table) {
+ if (pfkey_sk(sk)->registered) {
+ is_alive = true;
+ break;
+ }
+ }
+ rcu_read_unlock();
+
+ return is_alive;
+}
+
+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_reserved = 0;
+ pol->sadb_x_policy_id = xp->index;
+ pol->sadb_x_policy_priority = xp->priority;
+
+ /* 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, GFP_ATOMIC);
+ *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC);
+ 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_reserved = 0;
+ 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 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;
+ struct net *net = sock_net(sk);
+
+ 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_from_msg(skb_put(skb,len), msg, len))
+ goto out;
+
+ hdr = pfkey_get_base_msg(skb, &err);
+ if (!hdr)
+ goto out;
+
+ mutex_lock(&net->xfrm.xfrm_cfg_mutex);
+ err = pfkey_process(sk, skb, hdr);
+ mutex_unlock(&net->xfrm.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 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;
+
+ 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_msg(skb, 0, msg, 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_create("pfkey", 0, net->proc_net, &pfkey_proc_ops);
+ if (e == NULL)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void __net_exit pfkey_exit_proc(struct net *net)
+{
+ remove_proc_entry("pfkey", net->proc_net);
+}
+#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,
+ .is_alive = pfkey_is_alive,
+};
+
+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);
Code Review / kvmfornfv.git / blobdiff