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net/key/af_key.c
102 KB
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/* * 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> */ |
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#include <linux/capability.h> |
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#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> |
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#include <linux/slab.h> |
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#include <net/net_namespace.h> |
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#include <net/netns/generic.h> |
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#include <net/xfrm.h> #include <net/sock.h> #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x)) #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x)) |
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static int pfkey_net_id __read_mostly; |
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struct netns_pfkey { /* List of all pfkey sockets. */ struct hlist_head table; atomic_t socks_nr; }; |
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static DEFINE_MUTEX(pfkey_mutex); |
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#define DUMMY_MARK 0 |
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static const struct xfrm_mark dummy_mark = {0, 0}; |
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struct pfkey_sock { /* struct sock must be the first member of struct pfkey_sock */ struct sock sk; int registered; int promisc; |
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struct { uint8_t msg_version; |
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uint32_t msg_portid; |
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int (*dump)(struct pfkey_sock *sk); void (*done)(struct pfkey_sock *sk); union { struct xfrm_policy_walk policy; struct xfrm_state_walk state; } u; |
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struct sk_buff *skb; |
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} dump; |
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}; static inline struct pfkey_sock *pfkey_sk(struct sock *sk) { return (struct pfkey_sock *)sk; } |
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static int pfkey_can_dump(const struct sock *sk) |
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{ if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf) return 1; return 0; } |
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static void pfkey_terminate_dump(struct pfkey_sock *pfk) |
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{ |
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if (pfk->dump.dump) { |
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if (pfk->dump.skb) { kfree_skb(pfk->dump.skb); pfk->dump.skb = NULL; } |
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pfk->dump.done(pfk); pfk->dump.dump = NULL; pfk->dump.done = NULL; } |
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} |
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static void pfkey_sock_destruct(struct sock *sk) { |
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struct net *net = sock_net(sk); struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
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pfkey_terminate_dump(pfkey_sk(sk)); |
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skb_queue_purge(&sk->sk_receive_queue); if (!sock_flag(sk, SOCK_DEAD)) { |
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pr_err("Attempt to release alive pfkey socket: %p ", sk); |
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return; } |
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WARN_ON(atomic_read(&sk->sk_rmem_alloc)); WARN_ON(atomic_read(&sk->sk_wmem_alloc)); |
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|
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atomic_dec(&net_pfkey->socks_nr); |
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} |
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static const struct proto_ops pfkey_ops; |
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static void pfkey_insert(struct sock *sk) { |
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struct net *net = sock_net(sk); struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
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mutex_lock(&pfkey_mutex); sk_add_node_rcu(sk, &net_pfkey->table); mutex_unlock(&pfkey_mutex); |
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} static void pfkey_remove(struct sock *sk) { |
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mutex_lock(&pfkey_mutex); sk_del_node_init_rcu(sk); mutex_unlock(&pfkey_mutex); |
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} static struct proto key_proto = { .name = "KEY", .owner = THIS_MODULE, .obj_size = sizeof(struct pfkey_sock), }; |
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static int pfkey_create(struct net *net, struct socket *sock, int protocol, int kern) |
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{ |
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struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
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struct sock *sk; int err; |
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if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
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return -EPERM; if (sock->type != SOCK_RAW) return -ESOCKTNOSUPPORT; if (protocol != PF_KEY_V2) return -EPROTONOSUPPORT; err = -ENOMEM; |
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sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto); |
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if (sk == NULL) goto out; |
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sock->ops = &pfkey_ops; sock_init_data(sock, sk); sk->sk_family = PF_KEY; sk->sk_destruct = pfkey_sock_destruct; |
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atomic_inc(&net_pfkey->socks_nr); |
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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); |
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synchronize_rcu(); |
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sock_put(sk); return 0; } static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2, |
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gfp_t allocation, struct sock *sk) |
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{ 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) { |
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skb_set_owner_r(*skb2, sk); skb_queue_tail(&sk->sk_receive_queue, *skb2); |
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sk->sk_data_ready(sk); |
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*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 |
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static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation, |
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int broadcast_flags, struct sock *one_sk, struct net *net) |
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{ |
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struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
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struct sock *sk; |
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struct 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; |
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rcu_read_lock(); |
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sk_for_each_rcu(sk, &net_pfkey->table) { |
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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; } |
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rcu_read_unlock(); |
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if (one_sk != NULL) err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk); |
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kfree_skb(skb2); |
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kfree_skb(skb); return err; } |
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static int pfkey_do_dump(struct pfkey_sock *pfk) { |
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struct sadb_msg *hdr; |
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int rc; rc = pfk->dump.dump(pfk); if (rc == -ENOBUFS) return 0; |
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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, |
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&pfk->sk, sock_net(&pfk->sk)); |
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pfk->dump.skb = NULL; } |
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pfkey_terminate_dump(pfk); return rc; } |
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static inline void pfkey_hdr_dup(struct sadb_msg *new, const struct sadb_msg *orig) |
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{ *new = *orig; } |
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static int pfkey_error(const struct sadb_msg *orig, int err, struct sock *sk) |
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{ 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; |
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BUG_ON(err <= 0 || err >= 256); |
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hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg)); pfkey_hdr_dup(hdr, orig); hdr->sadb_msg_errno = (uint8_t) err; hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); |
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pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk)); |
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return 0; } |
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static const u8 sadb_ext_min_len[] = { |
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[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), |
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[SADB_X_EXT_SEC_CTX] = (u8) sizeof(struct sadb_x_sec_ctx), |
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[SADB_X_EXT_KMADDRESS] = (u8) sizeof(struct sadb_x_kmaddress), |
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[SADB_X_EXT_FILTER] = (u8) sizeof(struct sadb_x_filter), |
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}; /* Verify sadb_address_{len,prefixlen} against sa_family. */ |
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static int verify_address_len(const void *p) |
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{ |
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const struct sadb_address *sp = p; const struct sockaddr *addr = (const struct sockaddr *)(sp + 1); const struct sockaddr_in *sin; |
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#if IS_ENABLED(CONFIG_IPV6) |
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const struct sockaddr_in6 *sin6; |
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#endif int len; switch (addr->sa_family) { case AF_INET: |
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len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t)); |
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if (sp->sadb_address_len != len || sp->sadb_address_prefixlen > 32) return -EINVAL; break; |
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#if IS_ENABLED(CONFIG_IPV6) |
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case AF_INET6: |
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len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t)); |
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if (sp->sadb_address_len != len || sp->sadb_address_prefixlen > 128) return -EINVAL; break; #endif default: /* It is user using kernel to keep track of security * associations for another protocol, such as * OSPF/RSVP/RIPV2/MIP. It is user's job to verify * lengths. * * XXX Actually, association/policy database is not yet * XXX able to cope with arbitrary sockaddr families. * XXX When it can, remove this -EINVAL. -DaveM */ return -EINVAL; break; |
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} |
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return 0; } |
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static inline int pfkey_sec_ctx_len(const struct sadb_x_sec_ctx *sec_ctx) |
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{ |
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return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) + sec_ctx->sadb_x_ctx_len, sizeof(uint64_t)); |
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} |
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static inline int verify_sec_ctx_len(const void *p) |
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{ |
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const struct sadb_x_sec_ctx *sec_ctx = p; |
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int len = sec_ctx->sadb_x_ctx_len; |
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if (len > PAGE_SIZE) |
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return -EINVAL; len = pfkey_sec_ctx_len(sec_ctx); if (sec_ctx->sadb_x_sec_len != len) return -EINVAL; return 0; } |
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static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(const struct sadb_x_sec_ctx *sec_ctx, gfp_t gfp) |
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{ struct xfrm_user_sec_ctx *uctx = NULL; int ctx_size = sec_ctx->sadb_x_ctx_len; |
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uctx = kmalloc((sizeof(*uctx)+ctx_size), gfp); |
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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; } |
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static int present_and_same_family(const struct sadb_address *src, const struct sadb_address *dst) |
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{ |
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const struct sockaddr *s_addr, *d_addr; |
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if (!src || !dst) return 0; |
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s_addr = (const struct sockaddr *)(src + 1); d_addr = (const struct sockaddr *)(dst + 1); |
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if (s_addr->sa_family != d_addr->sa_family) return 0; if (s_addr->sa_family != AF_INET |
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#if IS_ENABLED(CONFIG_IPV6) |
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&& s_addr->sa_family != AF_INET6 #endif ) return 0; return 1; } |
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static int parse_exthdrs(struct sk_buff *skb, const struct sadb_msg *hdr, void **ext_hdrs) |
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{ |
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const char *p = (char *) hdr; |
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int len = skb->len; len -= sizeof(*hdr); p += sizeof(*hdr); while (len > 0) { |
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const struct sadb_ext *ehdr = (const struct sadb_ext *) p; |
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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; |
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} |
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if (ext_type == SADB_X_EXT_SEC_CTX) { if (verify_sec_ctx_len(p)) return -EINVAL; } |
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ext_hdrs[ext_type-1] = (void *) p; |
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} p += ext_len; len -= ext_len; } return 0; } static uint16_t pfkey_satype2proto(uint8_t satype) { switch (satype) { case SADB_SATYPE_UNSPEC: return IPSEC_PROTO_ANY; case SADB_SATYPE_AH: return IPPROTO_AH; case SADB_SATYPE_ESP: return IPPROTO_ESP; case SADB_X_SATYPE_IPCOMP: return IPPROTO_COMP; break; default: return 0; } /* NOTREACHED */ } static uint8_t pfkey_proto2satype(uint16_t proto) { switch (proto) { case IPPROTO_AH: return SADB_SATYPE_AH; case IPPROTO_ESP: return SADB_SATYPE_ESP; case IPPROTO_COMP: return SADB_X_SATYPE_IPCOMP; break; default: return 0; } /* NOTREACHED */ } /* BTW, this scheme means that there is no way with PFKEY2 sockets to * say specifically 'just raw sockets' as we encode them as 255. */ static uint8_t pfkey_proto_to_xfrm(uint8_t proto) { |
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return proto == IPSEC_PROTO_ANY ? 0 : proto; |
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} static uint8_t pfkey_proto_from_xfrm(uint8_t proto) { |
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return proto ? proto : IPSEC_PROTO_ANY; |
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} |
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549 550 551 552 553 |
static inline int pfkey_sockaddr_len(sa_family_t family) { switch (family) { case AF_INET: return sizeof(struct sockaddr_in); |
dfd56b8b3
|
554 |
#if IS_ENABLED(CONFIG_IPV6) |
9e8b4ed8b
|
555 556 557 558 559 560 |
case AF_INET6: return sizeof(struct sockaddr_in6); #endif } return 0; } |
5f95ac911
|
561 562 |
static int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr) |
1da177e4c
|
563 |
{ |
5f95ac911
|
564 |
switch (sa->sa_family) { |
1da177e4c
|
565 |
case AF_INET: |
8ff24541d
|
566 |
xaddr->a4 = |
5f95ac911
|
567 |
((struct sockaddr_in *)sa)->sin_addr.s_addr; |
1da177e4c
|
568 |
return AF_INET; |
dfd56b8b3
|
569 |
#if IS_ENABLED(CONFIG_IPV6) |
1da177e4c
|
570 |
case AF_INET6: |
8ff24541d
|
571 |
memcpy(xaddr->a6, |
5f95ac911
|
572 |
&((struct sockaddr_in6 *)sa)->sin6_addr, |
1da177e4c
|
573 574 575 |
sizeof(struct in6_addr)); return AF_INET6; #endif |
1da177e4c
|
576 |
} |
5f95ac911
|
577 578 579 580 |
return 0; } static |
4c93fbb06
|
581 |
int pfkey_sadb_addr2xfrm_addr(const struct sadb_address *addr, xfrm_address_t *xaddr) |
5f95ac911
|
582 583 584 |
{ return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1), xaddr); |
1da177e4c
|
585 |
} |
4c93fbb06
|
586 |
static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4c
|
587 |
{ |
4c93fbb06
|
588 589 |
const struct sadb_sa *sa; const struct sadb_address *addr; |
1da177e4c
|
590 591 592 |
uint16_t proto; unsigned short family; xfrm_address_t *xaddr; |
ea1107338
|
593 |
sa = ext_hdrs[SADB_EXT_SA - 1]; |
1da177e4c
|
594 595 596 597 598 599 600 601 |
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 */ |
ea1107338
|
602 |
addr = ext_hdrs[SADB_EXT_ADDRESS_DST - 1]; |
1da177e4c
|
603 604 |
if (addr == NULL) return NULL; |
4c93fbb06
|
605 |
family = ((const struct sockaddr *)(addr + 1))->sa_family; |
1da177e4c
|
606 607 |
switch (family) { case AF_INET: |
4c93fbb06
|
608 |
xaddr = (xfrm_address_t *)&((const struct sockaddr_in *)(addr + 1))->sin_addr; |
1da177e4c
|
609 |
break; |
dfd56b8b3
|
610 |
#if IS_ENABLED(CONFIG_IPV6) |
1da177e4c
|
611 |
case AF_INET6: |
4c93fbb06
|
612 |
xaddr = (xfrm_address_t *)&((const struct sockaddr_in6 *)(addr + 1))->sin6_addr; |
1da177e4c
|
613 614 615 616 617 618 619 620 |
break; #endif default: xaddr = NULL; } if (!xaddr) return NULL; |
bd55775c8
|
621 |
return xfrm_state_lookup(net, DUMMY_MARK, xaddr, sa->sadb_sa_spi, proto, family); |
1da177e4c
|
622 623 624 |
} #define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1))) |
9e8b4ed8b
|
625 |
|
1da177e4c
|
626 627 628 |
static int pfkey_sockaddr_size(sa_family_t family) { |
9e8b4ed8b
|
629 |
return PFKEY_ALIGN8(pfkey_sockaddr_len(family)); |
1da177e4c
|
630 |
} |
55569ce25
|
631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 |
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; } } |
183cad127
|
659 |
static unsigned int pfkey_sockaddr_fill(const xfrm_address_t *xaddr, __be16 port, |
4c93fbb06
|
660 661 |
struct sockaddr *sa, unsigned short family) |
e5b56652c
|
662 663 664 665 666 667 668 669 670 671 672 |
{ 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; } |
dfd56b8b3
|
673 |
#if IS_ENABLED(CONFIG_IPV6) |
e5b56652c
|
674 675 676 677 678 679 |
case AF_INET6: { struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; sin6->sin6_family = AF_INET6; sin6->sin6_port = port; sin6->sin6_flowinfo = 0; |
4e3fd7a06
|
680 |
sin6->sin6_addr = *(struct in6_addr *)xaddr->a6; |
e5b56652c
|
681 682 683 684 685 686 687 |
sin6->sin6_scope_id = 0; return 128; } #endif } return 0; } |
4c93fbb06
|
688 |
static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x, |
050f009e1
|
689 |
int add_keys, int hsc) |
1da177e4c
|
690 691 692 693 694 695 696 697 |
{ 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; |
df71837d5
|
698 699 700 |
struct sadb_x_sec_ctx *sec_ctx; struct xfrm_sec_ctx *xfrm_ctx; int ctx_size = 0; |
1da177e4c
|
701 702 703 704 705 |
int size; int auth_key_size = 0; int encrypt_key_size = 0; int sockaddr_size; struct xfrm_encap_tmpl *natt = NULL; |
55569ce25
|
706 |
int mode; |
1da177e4c
|
707 708 709 710 711 712 713 714 |
/* 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)> */ |
8ff24541d
|
715 |
size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + |
1da177e4c
|
716 717 718 |
sizeof(struct sadb_lifetime) + ((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) + ((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) + |
8ff24541d
|
719 |
sizeof(struct sadb_address)*2 + |
1da177e4c
|
720 721 |
sockaddr_size*2 + sizeof(struct sadb_x_sa2); |
df71837d5
|
722 723 724 725 726 |
if ((xfrm_ctx = x->security)) { ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); size += sizeof(struct sadb_x_sec_ctx) + ctx_size; } |
1da177e4c
|
727 |
/* identity & sensitivity */ |
70e94e66a
|
728 |
if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family)) |
1da177e4c
|
729 730 731 732 |
size += sizeof(struct sadb_address) + sockaddr_size; if (add_keys) { if (x->aalg && x->aalg->alg_key_len) { |
8ff24541d
|
733 734 |
auth_key_size = PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); |
1da177e4c
|
735 736 737 |
size += sizeof(struct sadb_key) + auth_key_size; } if (x->ealg && x->ealg->alg_key_len) { |
8ff24541d
|
738 739 |
encrypt_key_size = PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); |
1da177e4c
|
740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 |
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; |
4f09f0bbc
|
767 768 769 770 771 772 |
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: |
1da177e4c
|
773 |
sa->sadb_sa_state = SADB_SASTATE_LARVAL; |
4f09f0bbc
|
774 775 |
break; default: |
1da177e4c
|
776 |
sa->sadb_sa_state = SADB_SASTATE_DEAD; |
4f09f0bbc
|
777 778 |
break; } |
1da177e4c
|
779 780 781 |
sa->sadb_sa_auth = 0; if (x->aalg) { struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0); |
7e50f84c9
|
782 783 |
sa->sadb_sa_auth = (a && a->pfkey_supported) ? a->desc.sadb_alg_id : 0; |
1da177e4c
|
784 785 786 787 788 |
} 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); |
7e50f84c9
|
789 790 |
sa->sadb_sa_encrypt = (a && a->pfkey_supported) ? a->desc.sadb_alg_id : 0; |
1da177e4c
|
791 792 793 794 |
} /* 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); |
7e50f84c9
|
795 796 |
sa->sadb_sa_encrypt = (a && a->pfkey_supported) ? a->desc.sadb_alg_id : 0; |
1da177e4c
|
797 798 799 800 801 802 803 |
} 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; |
dd87147ee
|
804 805 |
if (x->props.flags & XFRM_STATE_NOPMTUDISC) sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC; |
1da177e4c
|
806 807 808 |
/* hard time */ if (hsc & 2) { |
8ff24541d
|
809 |
lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4c
|
810 811 812 813 814 815 816 817 818 819 820 |
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) { |
8ff24541d
|
821 |
lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4c
|
822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 |
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 */ |
8ff24541d
|
842 |
addr = (struct sadb_address*) skb_put(skb, |
1da177e4c
|
843 |
sizeof(struct sadb_address)+sockaddr_size); |
8ff24541d
|
844 |
addr->sadb_address_len = |
1da177e4c
|
845 846 847 |
(sizeof(struct sadb_address)+sockaddr_size)/ sizeof(uint64_t); addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC; |
8ff24541d
|
848 849 |
/* "if the ports are non-zero, then the sadb_address_proto field, normally zero, MUST be filled in with the transport |
1da177e4c
|
850 |
protocol's number." - RFC2367 */ |
8ff24541d
|
851 |
addr->sadb_address_proto = 0; |
1da177e4c
|
852 |
addr->sadb_address_reserved = 0; |
1da177e4c
|
853 |
|
e5b56652c
|
854 855 856 857 858 |
addr->sadb_address_prefixlen = pfkey_sockaddr_fill(&x->props.saddr, 0, (struct sockaddr *) (addr + 1), x->props.family); if (!addr->sadb_address_prefixlen) |
1da177e4c
|
859 860 861 |
BUG(); /* dst address */ |
8ff24541d
|
862 |
addr = (struct sadb_address*) skb_put(skb, |
1da177e4c
|
863 |
sizeof(struct sadb_address)+sockaddr_size); |
8ff24541d
|
864 |
addr->sadb_address_len = |
1da177e4c
|
865 866 867 |
(sizeof(struct sadb_address)+sockaddr_size)/ sizeof(uint64_t); addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST; |
8ff24541d
|
868 |
addr->sadb_address_proto = 0; |
1da177e4c
|
869 |
addr->sadb_address_reserved = 0; |
1da177e4c
|
870 |
|
e5b56652c
|
871 872 873 874 875 876 |
addr->sadb_address_prefixlen = pfkey_sockaddr_fill(&x->id.daddr, 0, (struct sockaddr *) (addr + 1), x->props.family); if (!addr->sadb_address_prefixlen) BUG(); |
1da177e4c
|
877 |
|
70e94e66a
|
878 879 |
if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family)) { |
e5b56652c
|
880 881 882 883 884 885 886 887 888 889 |
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; |
1da177e4c
|
890 |
|
e5b56652c
|
891 892 893 |
pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport, (struct sockaddr *) (addr + 1), x->props.family); |
1da177e4c
|
894 |
} |
1da177e4c
|
895 896 897 |
/* auth key */ if (add_keys && auth_key_size) { |
8ff24541d
|
898 |
key = (struct sadb_key *) skb_put(skb, |
1da177e4c
|
899 900 901 902 903 904 905 906 907 908 |
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) { |
8ff24541d
|
909 |
key = (struct sadb_key *) skb_put(skb, |
1da177e4c
|
910 |
sizeof(struct sadb_key)+encrypt_key_size); |
8ff24541d
|
911 |
key->sadb_key_len = (sizeof(struct sadb_key) + |
1da177e4c
|
912 913 914 915 |
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; |
8ff24541d
|
916 |
memcpy(key + 1, x->ealg->alg_key, |
1da177e4c
|
917 918 919 920 921 922 923 |
(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; |
55569ce25
|
924 925 926 927 928 |
if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) { kfree_skb(skb); return ERR_PTR(-EINVAL); } sa2->sadb_x_sa2_mode = mode; |
1da177e4c
|
929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 |
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; } |
df71837d5
|
961 962 963 964 965 966 967 968 969 970 971 972 973 |
/* 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); } |
1da177e4c
|
974 975 |
return skb; } |
050f009e1
|
976 |
|
4c93fbb06
|
977 |
static inline struct sk_buff *pfkey_xfrm_state2msg(const struct xfrm_state *x) |
050f009e1
|
978 979 |
{ struct sk_buff *skb; |
050f009e1
|
980 |
skb = __pfkey_xfrm_state2msg(x, 1, 3); |
050f009e1
|
981 982 983 |
return skb; } |
4c93fbb06
|
984 |
static inline struct sk_buff *pfkey_xfrm_state2msg_expire(const struct xfrm_state *x, |
050f009e1
|
985 986 987 988 |
int hsc) { return __pfkey_xfrm_state2msg(x, 0, hsc); } |
07fb0f179
|
989 |
static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net, |
4c93fbb06
|
990 991 |
const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4c
|
992 |
{ |
8ff24541d
|
993 |
struct xfrm_state *x; |
4c93fbb06
|
994 995 996 997 |
const struct sadb_lifetime *lifetime; const struct sadb_sa *sa; const struct sadb_key *key; const struct sadb_x_sec_ctx *sec_ctx; |
1da177e4c
|
998 999 |
uint16_t proto; int err; |
8ff24541d
|
1000 |
|
1da177e4c
|
1001 |
|
ea1107338
|
1002 |
sa = ext_hdrs[SADB_EXT_SA - 1]; |
1da177e4c
|
1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 |
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. |
8ff24541d
|
1032 |
However, KAME setkey always uses SADB_SASTATE_LARVAL. |
1da177e4c
|
1033 1034 1035 1036 1037 1038 1039 |
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); |
ea1107338
|
1040 |
key = ext_hdrs[SADB_EXT_KEY_AUTH - 1]; |
1da177e4c
|
1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 |
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); |
07fb0f179
|
1052 |
x = xfrm_state_alloc(net); |
1da177e4c
|
1053 1054 1055 1056 1057 |
if (x == NULL) return ERR_PTR(-ENOBUFS); x->id.proto = proto; x->id.spi = sa->sadb_sa_spi; |
33fce60d6
|
1058 1059 |
x->props.replay_window = min_t(unsigned int, sa->sadb_sa_replay, (sizeof(x->replay.bitmap) * 8)); |
1da177e4c
|
1060 1061 1062 1063 |
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; |
dd87147ee
|
1064 1065 |
if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC) x->props.flags |= XFRM_STATE_NOPMTUDISC; |
1da177e4c
|
1066 |
|
ea1107338
|
1067 |
lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD - 1]; |
1da177e4c
|
1068 1069 1070 1071 1072 1073 |
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; } |
ea1107338
|
1074 |
lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT - 1]; |
1da177e4c
|
1075 1076 1077 1078 1079 1080 |
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; } |
df71837d5
|
1081 |
|
ea1107338
|
1082 |
sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1]; |
df71837d5
|
1083 |
if (sec_ctx != NULL) { |
87536a81e
|
1084 |
struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL); |
df71837d5
|
1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 |
if (!uctx) goto out; err = security_xfrm_state_alloc(x, uctx); kfree(uctx); if (err) goto out; } |
ea1107338
|
1095 |
key = ext_hdrs[SADB_EXT_KEY_AUTH - 1]; |
1da177e4c
|
1096 1097 1098 |
if (sa->sadb_sa_auth) { int keysize = 0; struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth); |
7e50f84c9
|
1099 |
if (!a || !a->pfkey_supported) { |
1da177e4c
|
1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 |
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); } |
c20a66f47
|
1114 |
x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits; |
1da177e4c
|
1115 1116 1117 1118 1119 1120 |
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); |
7e50f84c9
|
1121 |
if (!a || !a->pfkey_supported) { |
1da177e4c
|
1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 |
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); |
7e50f84c9
|
1133 |
if (!a || !a->pfkey_supported) { |
1da177e4c
|
1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 |
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; */ |
8ff24541d
|
1153 |
x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], |
1da177e4c
|
1154 |
&x->props.saddr); |
8ff24541d
|
1155 |
pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], |
1da177e4c
|
1156 1157 1158 |
&x->id.daddr); if (ext_hdrs[SADB_X_EXT_SA2-1]) { |
4c93fbb06
|
1159 |
const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1]; |
55569ce25
|
1160 1161 1162 1163 1164 1165 |
int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); if (mode < 0) { err = -EINVAL; goto out; } x->props.mode = mode; |
1da177e4c
|
1166 1167 1168 1169 |
x->props.reqid = sa2->sadb_x_sa2_reqid; } if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) { |
4c93fbb06
|
1170 |
const struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]; |
1da177e4c
|
1171 1172 1173 1174 1175 |
/* 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; } |
4da510568
|
1176 |
if (!x->sel.family) |
4a4b6271a
|
1177 |
x->sel.family = x->props.family; |
1da177e4c
|
1178 |
if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) { |
4c93fbb06
|
1179 |
const struct sadb_x_nat_t_type* n_type; |
1da177e4c
|
1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 |
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]) { |
4c93fbb06
|
1191 |
const struct sadb_x_nat_t_port *n_port = |
1da177e4c
|
1192 1193 1194 1195 |
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]) { |
4c93fbb06
|
1196 |
const struct sadb_x_nat_t_port *n_port = |
1da177e4c
|
1197 1198 1199 |
ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]; natt->encap_dport = n_port->sadb_x_nat_t_port_port; } |
a8d694c65
|
1200 |
memset(&natt->encap_oa, 0, sizeof(natt->encap_oa)); |
1da177e4c
|
1201 |
} |
72cb6962a
|
1202 1203 |
err = xfrm_init_state(x); if (err) |
1da177e4c
|
1204 |
goto out; |
72cb6962a
|
1205 |
|
1da177e4c
|
1206 |
x->km.seq = hdr->sadb_msg_seq; |
1da177e4c
|
1207 1208 1209 1210 1211 1212 1213 |
return x; out: x->km.state = XFRM_STATE_DEAD; xfrm_state_put(x); return ERR_PTR(err); } |
4c93fbb06
|
1214 |
static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4c
|
1215 1216 1217 |
{ return -EOPNOTSUPP; } |
4c93fbb06
|
1218 |
static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4c
|
1219 |
{ |
07fb0f179
|
1220 |
struct net *net = sock_net(sk); |
1da177e4c
|
1221 1222 1223 1224 |
struct sk_buff *resp_skb; struct sadb_x_sa2 *sa2; struct sadb_address *saddr, *daddr; struct sadb_msg *out_hdr; |
658b219e9
|
1225 |
struct sadb_spirange *range; |
1da177e4c
|
1226 |
struct xfrm_state *x = NULL; |
55569ce25
|
1227 |
int mode; |
658b219e9
|
1228 1229 |
int err; u32 min_spi, max_spi; |
1da177e4c
|
1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 |
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) { |
55569ce25
|
1244 1245 1246 |
mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode); if (mode < 0) return -EINVAL; |
1da177e4c
|
1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 |
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; |
dfd56b8b3
|
1262 |
#if IS_ENABLED(CONFIG_IPV6) |
1da177e4c
|
1263 1264 1265 1266 1267 1268 1269 1270 |
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) { |
bd55775c8
|
1271 |
x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq); |
70e94e66a
|
1272 |
if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) { |
1da177e4c
|
1273 1274 1275 1276 1277 1278 |
xfrm_state_put(x); x = NULL; } } if (!x) |
bd55775c8
|
1279 |
x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family); |
1da177e4c
|
1280 1281 1282 |
if (x == NULL) return -ENOENT; |
658b219e9
|
1283 1284 |
min_spi = 0x100; max_spi = 0x0fffffff; |
1da177e4c
|
1285 |
|
658b219e9
|
1286 1287 1288 1289 |
range = ext_hdrs[SADB_EXT_SPIRANGE-1]; if (range) { min_spi = range->sadb_spirange_min; max_spi = range->sadb_spirange_max; |
1da177e4c
|
1290 |
} |
658b219e9
|
1291 |
|
776e9dd90
|
1292 1293 1294 1295 1296 |
err = verify_spi_info(x->id.proto, min_spi, max_spi); if (err) { xfrm_state_put(x); return err; } |
658b219e9
|
1297 |
err = xfrm_alloc_spi(x, min_spi, max_spi); |
050f009e1
|
1298 |
resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x); |
1da177e4c
|
1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 |
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); |
07fb0f179
|
1315 |
pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net); |
1da177e4c
|
1316 1317 1318 |
return 0; } |
4c93fbb06
|
1319 |
static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4c
|
1320 |
{ |
07fb0f179
|
1321 |
struct net *net = sock_net(sk); |
1da177e4c
|
1322 1323 1324 1325 1326 1327 1328 |
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; |
bd55775c8
|
1329 |
x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq); |
1da177e4c
|
1330 1331 1332 1333 |
if (x == NULL) return 0; spin_lock_bh(&x->lock); |
5b8ef3415
|
1334 |
if (x->km.state == XFRM_STATE_ACQ) |
1da177e4c
|
1335 |
x->km.state = XFRM_STATE_ERROR; |
5b8ef3415
|
1336 |
|
1da177e4c
|
1337 1338 1339 1340 |
spin_unlock_bh(&x->lock); xfrm_state_put(x); return 0; } |
26b15dad9
|
1341 1342 1343 |
static inline int event2poltype(int event) { switch (event) { |
f60f6b8f7
|
1344 |
case XFRM_MSG_DELPOLICY: |
26b15dad9
|
1345 |
return SADB_X_SPDDELETE; |
f60f6b8f7
|
1346 |
case XFRM_MSG_NEWPOLICY: |
26b15dad9
|
1347 |
return SADB_X_SPDADD; |
f60f6b8f7
|
1348 |
case XFRM_MSG_UPDPOLICY: |
26b15dad9
|
1349 |
return SADB_X_SPDUPDATE; |
f60f6b8f7
|
1350 |
case XFRM_MSG_POLEXPIRE: |
26b15dad9
|
1351 1352 |
// return SADB_X_SPDEXPIRE; default: |
207024b94
|
1353 1354 |
pr_err("pfkey: Unknown policy event %d ", event); |
26b15dad9
|
1355 1356 1357 1358 1359 1360 1361 1362 1363 |
break; } return 0; } static inline int event2keytype(int event) { switch (event) { |
f60f6b8f7
|
1364 |
case XFRM_MSG_DELSA: |
26b15dad9
|
1365 |
return SADB_DELETE; |
f60f6b8f7
|
1366 |
case XFRM_MSG_NEWSA: |
26b15dad9
|
1367 |
return SADB_ADD; |
f60f6b8f7
|
1368 |
case XFRM_MSG_UPDSA: |
26b15dad9
|
1369 |
return SADB_UPDATE; |
f60f6b8f7
|
1370 |
case XFRM_MSG_EXPIRE: |
26b15dad9
|
1371 1372 |
return SADB_EXPIRE; default: |
207024b94
|
1373 1374 |
pr_err("pfkey: Unknown SA event %d ", event); |
26b15dad9
|
1375 1376 1377 1378 1379 1380 1381 |
break; } return 0; } /* ADD/UPD/DEL */ |
214e005bc
|
1382 |
static int key_notify_sa(struct xfrm_state *x, const struct km_event *c) |
26b15dad9
|
1383 1384 1385 |
{ struct sk_buff *skb; struct sadb_msg *hdr; |
26b15dad9
|
1386 |
|
050f009e1
|
1387 |
skb = pfkey_xfrm_state2msg(x); |
26b15dad9
|
1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 |
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; |
15e473046
|
1399 |
hdr->sadb_msg_pid = c->portid; |
26b15dad9
|
1400 |
|
07fb0f179
|
1401 |
pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x)); |
26b15dad9
|
1402 1403 1404 |
return 0; } |
1da177e4c
|
1405 |
|
4c93fbb06
|
1406 |
static int pfkey_add(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4c
|
1407 |
{ |
07fb0f179
|
1408 |
struct net *net = sock_net(sk); |
1da177e4c
|
1409 1410 |
struct xfrm_state *x; int err; |
26b15dad9
|
1411 |
struct km_event c; |
1da177e4c
|
1412 |
|
07fb0f179
|
1413 |
x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs); |
1da177e4c
|
1414 1415 |
if (IS_ERR(x)) return PTR_ERR(x); |
26b15dad9
|
1416 |
xfrm_state_hold(x); |
1da177e4c
|
1417 1418 1419 1420 |
if (hdr->sadb_msg_type == SADB_ADD) err = xfrm_state_add(x); else err = xfrm_state_update(x); |
ab5f5e8b1
|
1421 |
xfrm_audit_state_add(x, err ? 0 : 1, |
2532386f4
|
1422 1423 |
audit_get_loginuid(current), audit_get_sessionid(current), 0); |
161a09e73
|
1424 |
|
1da177e4c
|
1425 1426 |
if (err < 0) { x->km.state = XFRM_STATE_DEAD; |
21380b81e
|
1427 |
__xfrm_state_put(x); |
7d6dfe1f5
|
1428 |
goto out; |
1da177e4c
|
1429 |
} |
26b15dad9
|
1430 |
if (hdr->sadb_msg_type == SADB_ADD) |
f60f6b8f7
|
1431 |
c.event = XFRM_MSG_NEWSA; |
26b15dad9
|
1432 |
else |
f60f6b8f7
|
1433 |
c.event = XFRM_MSG_UPDSA; |
26b15dad9
|
1434 |
c.seq = hdr->sadb_msg_seq; |
15e473046
|
1435 |
c.portid = hdr->sadb_msg_pid; |
26b15dad9
|
1436 |
km_state_notify(x, &c); |
7d6dfe1f5
|
1437 |
out: |
26b15dad9
|
1438 |
xfrm_state_put(x); |
26b15dad9
|
1439 |
return err; |
1da177e4c
|
1440 |
} |
4c93fbb06
|
1441 |
static int pfkey_delete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4c
|
1442 |
{ |
07fb0f179
|
1443 |
struct net *net = sock_net(sk); |
1da177e4c
|
1444 |
struct xfrm_state *x; |
26b15dad9
|
1445 1446 |
struct km_event c; int err; |
1da177e4c
|
1447 1448 1449 1450 1451 |
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; |
07fb0f179
|
1452 |
x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs); |
1da177e4c
|
1453 1454 |
if (x == NULL) return -ESRCH; |
c8c05a8ee
|
1455 1456 |
if ((err = security_xfrm_state_delete(x))) goto out; |
1da177e4c
|
1457 |
if (xfrm_state_kern(x)) { |
c8c05a8ee
|
1458 1459 |
err = -EPERM; goto out; |
1da177e4c
|
1460 |
} |
161a09e73
|
1461 |
|
26b15dad9
|
1462 |
err = xfrm_state_delete(x); |
161a09e73
|
1463 |
|
c8c05a8ee
|
1464 1465 |
if (err < 0) goto out; |
1da177e4c
|
1466 |
|
26b15dad9
|
1467 |
c.seq = hdr->sadb_msg_seq; |
15e473046
|
1468 |
c.portid = hdr->sadb_msg_pid; |
f60f6b8f7
|
1469 |
c.event = XFRM_MSG_DELSA; |
26b15dad9
|
1470 |
km_state_notify(x, &c); |
c8c05a8ee
|
1471 |
out: |
ab5f5e8b1
|
1472 |
xfrm_audit_state_delete(x, err ? 0 : 1, |
2532386f4
|
1473 1474 |
audit_get_loginuid(current), audit_get_sessionid(current), 0); |
26b15dad9
|
1475 |
xfrm_state_put(x); |
1da177e4c
|
1476 |
|
26b15dad9
|
1477 |
return err; |
1da177e4c
|
1478 |
} |
4c93fbb06
|
1479 |
static int pfkey_get(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4c
|
1480 |
{ |
07fb0f179
|
1481 |
struct net *net = sock_net(sk); |
1da177e4c
|
1482 1483 1484 1485 1486 1487 1488 1489 1490 |
__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; |
07fb0f179
|
1491 |
x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs); |
1da177e4c
|
1492 1493 |
if (x == NULL) return -ESRCH; |
050f009e1
|
1494 |
out_skb = pfkey_xfrm_state2msg(x); |
1da177e4c
|
1495 1496 1497 1498 1499 1500 1501 |
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; |
435000beb
|
1502 |
out_hdr->sadb_msg_type = SADB_GET; |
1da177e4c
|
1503 1504 1505 1506 1507 |
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; |
07fb0f179
|
1508 |
pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk)); |
1da177e4c
|
1509 1510 1511 |
return 0; } |
4c93fbb06
|
1512 |
static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig, |
dd0fc66fb
|
1513 |
gfp_t allocation) |
1da177e4c
|
1514 1515 1516 1517 |
{ struct sk_buff *skb; struct sadb_msg *hdr; int len, auth_len, enc_len, i; |
7e50f84c9
|
1518 |
auth_len = xfrm_count_pfkey_auth_supported(); |
1da177e4c
|
1519 1520 1521 1522 |
if (auth_len) { auth_len *= sizeof(struct sadb_alg); auth_len += sizeof(struct sadb_supported); } |
8ff24541d
|
1523 |
|
7e50f84c9
|
1524 |
enc_len = xfrm_count_pfkey_enc_supported(); |
1da177e4c
|
1525 1526 1527 1528 |
if (enc_len) { enc_len *= sizeof(struct sadb_alg); enc_len += sizeof(struct sadb_supported); } |
8ff24541d
|
1529 |
|
1da177e4c
|
1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 |
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; |
7e50f84c9
|
1555 1556 |
if (!aalg->pfkey_supported) continue; |
1da177e4c
|
1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 |
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; |
7e50f84c9
|
1576 1577 |
if (!ealg->pfkey_supported) continue; |
1da177e4c
|
1578 1579 1580 1581 1582 1583 1584 1585 |
if (ealg->available) *ap++ = ealg->desc; } } out_put_algs: return skb; } |
4c93fbb06
|
1586 |
static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4c
|
1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 |
{ 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(); |
8ff24541d
|
1601 |
|
1da177e4c
|
1602 1603 1604 1605 1606 1607 1608 |
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; } |
07fb0f179
|
1609 |
pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, sock_net(sk)); |
1da177e4c
|
1610 1611 1612 |
return 0; } |
4c93fbb06
|
1613 |
static int unicast_flush_resp(struct sock *sk, const struct sadb_msg *ihdr) |
8be987d73
|
1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 |
{ 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)); } |
214e005bc
|
1629 |
static int key_notify_sa_flush(const struct km_event *c) |
26b15dad9
|
1630 1631 1632 1633 1634 1635 1636 1637 |
{ 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)); |
bf08867f9
|
1638 |
hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto); |
151bb0ffe
|
1639 |
hdr->sadb_msg_type = SADB_FLUSH; |
26b15dad9
|
1640 |
hdr->sadb_msg_seq = c->seq; |
15e473046
|
1641 |
hdr->sadb_msg_pid = c->portid; |
26b15dad9
|
1642 1643 1644 |
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)); |
a5cc68f3d
|
1645 |
hdr->sadb_msg_reserved = 0; |
26b15dad9
|
1646 |
|
07fb0f179
|
1647 |
pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net); |
26b15dad9
|
1648 1649 1650 |
return 0; } |
4c93fbb06
|
1651 |
static int pfkey_flush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4c
|
1652 |
{ |
07fb0f179
|
1653 |
struct net *net = sock_net(sk); |
95c961747
|
1654 |
unsigned int proto; |
26b15dad9
|
1655 |
struct km_event c; |
161a09e73
|
1656 |
struct xfrm_audit audit_info; |
8be987d73
|
1657 |
int err, err2; |
1da177e4c
|
1658 1659 1660 1661 |
proto = pfkey_satype2proto(hdr->sadb_msg_satype); if (proto == 0) return -EINVAL; |
0c11b9428
|
1662 |
audit_info.loginuid = audit_get_loginuid(current); |
2532386f4
|
1663 |
audit_info.sessionid = audit_get_sessionid(current); |
161a09e73
|
1664 |
audit_info.secid = 0; |
07fb0f179
|
1665 |
err = xfrm_state_flush(net, proto, &audit_info); |
8be987d73
|
1666 |
err2 = unicast_flush_resp(sk, hdr); |
9e64cc957
|
1667 1668 1669 |
if (err || err2) { if (err == -ESRCH) /* empty table - go quietly */ err = 0; |
8be987d73
|
1670 |
return err ? err : err2; |
9e64cc957
|
1671 |
} |
8be987d73
|
1672 |
|
bf08867f9
|
1673 |
c.data.proto = proto; |
26b15dad9
|
1674 |
c.seq = hdr->sadb_msg_seq; |
15e473046
|
1675 |
c.portid = hdr->sadb_msg_pid; |
f60f6b8f7
|
1676 |
c.event = XFRM_MSG_FLUSHSA; |
07fb0f179
|
1677 |
c.net = net; |
26b15dad9
|
1678 |
km_state_notify(NULL, &c); |
1da177e4c
|
1679 1680 1681 |
return 0; } |
1da177e4c
|
1682 1683 |
static int dump_sa(struct xfrm_state *x, int count, void *ptr) { |
83321d6b9
|
1684 |
struct pfkey_sock *pfk = ptr; |
1da177e4c
|
1685 1686 |
struct sk_buff *out_skb; struct sadb_msg *out_hdr; |
83321d6b9
|
1687 1688 |
if (!pfkey_can_dump(&pfk->sk)) return -ENOBUFS; |
050f009e1
|
1689 |
out_skb = pfkey_xfrm_state2msg(x); |
1da177e4c
|
1690 1691 1692 1693 |
if (IS_ERR(out_skb)) return PTR_ERR(out_skb); out_hdr = (struct sadb_msg *) out_skb->data; |
83321d6b9
|
1694 |
out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4c
|
1695 1696 1697 1698 |
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; |
12a169e7d
|
1699 |
out_hdr->sadb_msg_seq = count + 1; |
15e473046
|
1700 |
out_hdr->sadb_msg_pid = pfk->dump.msg_portid; |
12a169e7d
|
1701 1702 1703 |
if (pfk->dump.skb) pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, |
07fb0f179
|
1704 |
&pfk->sk, sock_net(&pfk->sk)); |
12a169e7d
|
1705 |
pfk->dump.skb = out_skb; |
1da177e4c
|
1706 1707 |
return 0; } |
83321d6b9
|
1708 1709 |
static int pfkey_dump_sa(struct pfkey_sock *pfk) { |
07fb0f179
|
1710 1711 |
struct net *net = sock_net(&pfk->sk); return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk); |
83321d6b9
|
1712 1713 1714 1715 |
} static void pfkey_dump_sa_done(struct pfkey_sock *pfk) { |
283bc9f35
|
1716 1717 1718 |
struct net *net = sock_net(&pfk->sk); xfrm_state_walk_done(&pfk->dump.u.state, net); |
83321d6b9
|
1719 |
} |
4c93fbb06
|
1720 |
static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4c
|
1721 1722 |
{ u8 proto; |
870a2df4c
|
1723 |
struct xfrm_address_filter *filter = NULL; |
83321d6b9
|
1724 1725 1726 1727 |
struct pfkey_sock *pfk = pfkey_sk(sk); if (pfk->dump.dump != NULL) return -EBUSY; |
1da177e4c
|
1728 1729 1730 1731 |
proto = pfkey_satype2proto(hdr->sadb_msg_satype); if (proto == 0) return -EINVAL; |
d3623099d
|
1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 |
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; } |
83321d6b9
|
1747 |
pfk->dump.msg_version = hdr->sadb_msg_version; |
15e473046
|
1748 |
pfk->dump.msg_portid = hdr->sadb_msg_pid; |
83321d6b9
|
1749 1750 |
pfk->dump.dump = pfkey_dump_sa; pfk->dump.done = pfkey_dump_sa_done; |
d3623099d
|
1751 |
xfrm_state_walk_init(&pfk->dump.u.state, proto, filter); |
4c563f766
|
1752 |
|
83321d6b9
|
1753 |
return pfkey_do_dump(pfk); |
1da177e4c
|
1754 |
} |
4c93fbb06
|
1755 |
static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4c
|
1756 1757 1758 |
{ struct pfkey_sock *pfk = pfkey_sk(sk); int satype = hdr->sadb_msg_satype; |
4c93fbb06
|
1759 |
bool reset_errno = false; |
1da177e4c
|
1760 1761 |
if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) { |
4c93fbb06
|
1762 |
reset_errno = true; |
1da177e4c
|
1763 1764 1765 1766 |
if (satype != 0 && satype != 1) return -EINVAL; pfk->promisc = satype; } |
4c93fbb06
|
1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 |
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)); |
1da177e4c
|
1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 |
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; } |
07fb0f179
|
1792 |
static u32 gen_reqid(struct net *net) |
1da177e4c
|
1793 |
{ |
4c563f766
|
1794 |
struct xfrm_policy_walk walk; |
1da177e4c
|
1795 |
u32 start; |
4c563f766
|
1796 |
int rc; |
1da177e4c
|
1797 1798 1799 1800 1801 1802 1803 |
static u32 reqid = IPSEC_MANUAL_REQID_MAX; start = reqid; do { ++reqid; if (reqid == 0) reqid = IPSEC_MANUAL_REQID_MAX+1; |
4c563f766
|
1804 |
xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN); |
07fb0f179
|
1805 |
rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid); |
283bc9f35
|
1806 |
xfrm_policy_walk_done(&walk, net); |
4c563f766
|
1807 |
if (rc != -EEXIST) |
1da177e4c
|
1808 1809 1810 1811 1812 1813 1814 1815 |
return reqid; } while (reqid != start); return 0; } static int parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq) { |
07fb0f179
|
1816 |
struct net *net = xp_net(xp); |
1da177e4c
|
1817 |
struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr; |
55569ce25
|
1818 |
int mode; |
1da177e4c
|
1819 1820 1821 1822 1823 1824 1825 1826 |
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 */ |
55569ce25
|
1827 1828 1829 |
if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0) return -EINVAL; t->mode = mode; |
1da177e4c
|
1830 1831 1832 1833 1834 1835 |
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; |
07fb0f179
|
1836 |
if (!t->reqid && !(t->reqid = gen_reqid(net))) |
1da177e4c
|
1837 1838 1839 1840 |
return -ENOBUFS; } /* addresses present only in tunnel mode */ |
7e49e6de3
|
1841 |
if (t->mode == XFRM_MODE_TUNNEL) { |
5f95ac911
|
1842 1843 1844 1845 1846 1847 |
u8 *sa = (u8 *) (rq + 1); int family, socklen; family = pfkey_sockaddr_extract((struct sockaddr *)sa, &t->saddr); if (!family) |
1da177e4c
|
1848 |
return -EINVAL; |
5f95ac911
|
1849 1850 1851 1852 1853 1854 |
socklen = pfkey_sockaddr_len(family); if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen), &t->id.daddr) != family) return -EINVAL; t->encap_family = family; |
2718aa7c5
|
1855 1856 |
} else t->encap_family = xp->family; |
1da177e4c
|
1857 |
/* No way to set this via kame pfkey */ |
c5d18e984
|
1858 |
t->allalgs = 1; |
1da177e4c
|
1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 |
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); |
f674e72ff
|
1869 1870 |
if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy)) return -EINVAL; |
1da177e4c
|
1871 1872 1873 1874 1875 1876 1877 1878 |
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; } |
4c93fbb06
|
1879 |
static inline int pfkey_xfrm_policy2sec_ctx_size(const struct xfrm_policy *xp) |
df71837d5
|
1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 |
{ 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; } |
4c93fbb06
|
1890 |
static int pfkey_xfrm_policy2msg_size(const struct xfrm_policy *xp) |
1da177e4c
|
1891 |
{ |
4c93fbb06
|
1892 |
const struct xfrm_tmpl *t; |
1da177e4c
|
1893 |
int sockaddr_size = pfkey_sockaddr_size(xp->family); |
2718aa7c5
|
1894 1895 1896 1897 1898 |
int socklen = 0; int i; for (i=0; i<xp->xfrm_nr; i++) { t = xp->xfrm_vec + i; |
9e8b4ed8b
|
1899 |
socklen += pfkey_sockaddr_len(t->encap_family); |
2718aa7c5
|
1900 |
} |
1da177e4c
|
1901 1902 1903 |
return sizeof(struct sadb_msg) + (sizeof(struct sadb_lifetime) * 3) + |
8ff24541d
|
1904 |
(sizeof(struct sadb_address) * 2) + |
1da177e4c
|
1905 1906 |
(sockaddr_size * 2) + sizeof(struct sadb_x_policy) + |
2718aa7c5
|
1907 1908 |
(xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) + (socklen * 2) + |
df71837d5
|
1909 |
pfkey_xfrm_policy2sec_ctx_size(xp); |
1da177e4c
|
1910 |
} |
4c93fbb06
|
1911 |
static struct sk_buff * pfkey_xfrm_policy2msg_prep(const struct xfrm_policy *xp) |
1da177e4c
|
1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 |
{ 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; } |
4c93fbb06
|
1924 |
static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *xp, int dir) |
1da177e4c
|
1925 1926 1927 1928 1929 |
{ struct sadb_msg *hdr; struct sadb_address *addr; struct sadb_lifetime *lifetime; struct sadb_x_policy *pol; |
df71837d5
|
1930 1931 |
struct sadb_x_sec_ctx *sec_ctx; struct xfrm_sec_ctx *xfrm_ctx; |
1da177e4c
|
1932 1933 1934 |
int i; int size; int sockaddr_size = pfkey_sockaddr_size(xp->family); |
9e8b4ed8b
|
1935 |
int socklen = pfkey_sockaddr_len(xp->family); |
1da177e4c
|
1936 1937 1938 1939 1940 1941 1942 1943 |
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 */ |
8ff24541d
|
1944 |
addr = (struct sadb_address*) skb_put(skb, |
1da177e4c
|
1945 |
sizeof(struct sadb_address)+sockaddr_size); |
8ff24541d
|
1946 |
addr->sadb_address_len = |
1da177e4c
|
1947 1948 1949 1950 1951 1952 |
(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; |
e5b56652c
|
1953 1954 1955 1956 |
if (!pfkey_sockaddr_fill(&xp->selector.saddr, xp->selector.sport, (struct sockaddr *) (addr + 1), xp->family)) |
1da177e4c
|
1957 1958 1959 |
BUG(); /* dst address */ |
8ff24541d
|
1960 |
addr = (struct sadb_address*) skb_put(skb, |
1da177e4c
|
1961 1962 1963 1964 1965 1966 |
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); |
8ff24541d
|
1967 |
addr->sadb_address_prefixlen = xp->selector.prefixlen_d; |
1da177e4c
|
1968 |
addr->sadb_address_reserved = 0; |
e5b56652c
|
1969 1970 1971 1972 |
pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport, (struct sockaddr *) (addr + 1), xp->family); |
1da177e4c
|
1973 1974 |
/* hard time */ |
8ff24541d
|
1975 |
lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4c
|
1976 1977 1978 1979 1980 1981 1982 1983 1984 |
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 */ |
8ff24541d
|
1985 |
lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4c
|
1986 1987 1988 1989 1990 1991 1992 1993 1994 |
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 */ |
8ff24541d
|
1995 |
lifetime = (struct sadb_lifetime *) skb_put(skb, |
1da177e4c
|
1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 |
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; |
ff862a466
|
2016 |
pol->sadb_x_policy_reserved = 0; |
1da177e4c
|
2017 2018 2019 2020 |
pol->sadb_x_policy_id = xp->index; pol->sadb_x_policy_priority = xp->priority; for (i=0; i<xp->xfrm_nr; i++) { |
4c93fbb06
|
2021 |
const struct xfrm_tmpl *t = xp->xfrm_vec + i; |
1da177e4c
|
2022 |
struct sadb_x_ipsecrequest *rq; |
1da177e4c
|
2023 |
int req_size; |
55569ce25
|
2024 |
int mode; |
1da177e4c
|
2025 2026 |
req_size = sizeof(struct sadb_x_ipsecrequest); |
e5b56652c
|
2027 2028 2029 2030 |
if (t->mode == XFRM_MODE_TUNNEL) { socklen = pfkey_sockaddr_len(t->encap_family); req_size += socklen * 2; } else { |
1da177e4c
|
2031 |
size -= 2*socklen; |
e5b56652c
|
2032 |
} |
1da177e4c
|
2033 2034 2035 2036 2037 |
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; |
55569ce25
|
2038 2039 |
if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0) return -EINVAL; |
fefaa75e0
|
2040 |
rq->sadb_x_ipsecrequest_mode = mode; |
1da177e4c
|
2041 2042 2043 2044 2045 2046 |
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; |
e5b56652c
|
2047 |
|
7e49e6de3
|
2048 |
if (t->mode == XFRM_MODE_TUNNEL) { |
e5b56652c
|
2049 2050 2051 2052 2053 2054 2055 |
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); |
1da177e4c
|
2056 2057 |
} } |
df71837d5
|
2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 |
/* 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); } |
1da177e4c
|
2072 2073 |
hdr->sadb_msg_len = size / sizeof(uint64_t); hdr->sadb_msg_reserved = atomic_read(&xp->refcnt); |
55569ce25
|
2074 2075 |
return 0; |
1da177e4c
|
2076 |
} |
214e005bc
|
2077 |
static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad9
|
2078 2079 2080 2081 2082 2083 |
{ struct sk_buff *out_skb; struct sadb_msg *out_hdr; int err; out_skb = pfkey_xfrm_policy2msg_prep(xp); |
9a127aad4
|
2084 2085 |
if (IS_ERR(out_skb)) return PTR_ERR(out_skb); |
55569ce25
|
2086 2087 2088 |
err = pfkey_xfrm_policy2msg(out_skb, xp, dir); if (err < 0) return err; |
26b15dad9
|
2089 2090 2091 |
out_hdr = (struct sadb_msg *) out_skb->data; out_hdr->sadb_msg_version = PF_KEY_V2; |
f60f6b8f7
|
2092 |
if (c->data.byid && c->event == XFRM_MSG_DELPOLICY) |
26b15dad9
|
2093 2094 2095 2096 2097 |
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; |
15e473046
|
2098 |
out_hdr->sadb_msg_pid = c->portid; |
07fb0f179
|
2099 |
pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp)); |
26b15dad9
|
2100 2101 2102 |
return 0; } |
4c93fbb06
|
2103 |
static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4c
|
2104 |
{ |
07fb0f179
|
2105 |
struct net *net = sock_net(sk); |
df71837d5
|
2106 |
int err = 0; |
1da177e4c
|
2107 2108 2109 2110 |
struct sadb_lifetime *lifetime; struct sadb_address *sa; struct sadb_x_policy *pol; struct xfrm_policy *xp; |
26b15dad9
|
2111 |
struct km_event c; |
df71837d5
|
2112 |
struct sadb_x_sec_ctx *sec_ctx; |
1da177e4c
|
2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 |
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; |
07fb0f179
|
2124 |
xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4c
|
2125 2126 2127 2128 2129 2130 |
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; |
d0d79c3fd
|
2131 |
sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; |
1da177e4c
|
2132 |
xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr); |
1da177e4c
|
2133 2134 2135 2136 2137 |
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) |
8f83f23e6
|
2138 |
xp->selector.sport_mask = htons(0xffff); |
1da177e4c
|
2139 |
|
d0d79c3fd
|
2140 |
sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; |
1da177e4c
|
2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 |
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) |
8f83f23e6
|
2151 |
xp->selector.dport_mask = htons(0xffff); |
1da177e4c
|
2152 |
|
ea1107338
|
2153 |
sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1]; |
df71837d5
|
2154 |
if (sec_ctx != NULL) { |
87536a81e
|
2155 |
struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL); |
df71837d5
|
2156 2157 2158 2159 2160 |
if (!uctx) { err = -ENOBUFS; goto out; } |
52a4c6404
|
2161 |
err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL); |
df71837d5
|
2162 2163 2164 2165 2166 |
kfree(uctx); if (err) goto out; } |
1da177e4c
|
2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 |
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; |
1da177e4c
|
2187 2188 |
err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp, hdr->sadb_msg_type != SADB_X_SPDUPDATE); |
df71837d5
|
2189 |
|
ab5f5e8b1
|
2190 |
xfrm_audit_policy_add(xp, err ? 0 : 1, |
2532386f4
|
2191 2192 |
audit_get_loginuid(current), audit_get_sessionid(current), 0); |
161a09e73
|
2193 |
|
df71837d5
|
2194 2195 |
if (err) goto out; |
1da177e4c
|
2196 |
|
26b15dad9
|
2197 |
if (hdr->sadb_msg_type == SADB_X_SPDUPDATE) |
f60f6b8f7
|
2198 |
c.event = XFRM_MSG_UPDPOLICY; |
8ff24541d
|
2199 |
else |
f60f6b8f7
|
2200 |
c.event = XFRM_MSG_NEWPOLICY; |
1da177e4c
|
2201 |
|
26b15dad9
|
2202 |
c.seq = hdr->sadb_msg_seq; |
15e473046
|
2203 |
c.portid = hdr->sadb_msg_pid; |
1da177e4c
|
2204 |
|
26b15dad9
|
2205 2206 |
km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); xfrm_pol_put(xp); |
1da177e4c
|
2207 2208 2209 |
return 0; out: |
12a169e7d
|
2210 |
xp->walk.dead = 1; |
64c31b3f7
|
2211 |
xfrm_policy_destroy(xp); |
1da177e4c
|
2212 2213 |
return err; } |
4c93fbb06
|
2214 |
static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4c
|
2215 |
{ |
07fb0f179
|
2216 |
struct net *net = sock_net(sk); |
1da177e4c
|
2217 2218 2219 |
int err; struct sadb_address *sa; struct sadb_x_policy *pol; |
03e1ad7b5
|
2220 |
struct xfrm_policy *xp; |
1da177e4c
|
2221 |
struct xfrm_selector sel; |
26b15dad9
|
2222 |
struct km_event c; |
df71837d5
|
2223 |
struct sadb_x_sec_ctx *sec_ctx; |
2db3e47e7
|
2224 |
struct xfrm_sec_ctx *pol_ctx = NULL; |
1da177e4c
|
2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 |
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)); |
d0d79c3fd
|
2236 |
sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1]; |
1da177e4c
|
2237 2238 2239 2240 2241 |
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) |
8f83f23e6
|
2242 |
sel.sport_mask = htons(0xffff); |
1da177e4c
|
2243 |
|
d0d79c3fd
|
2244 |
sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1]; |
1da177e4c
|
2245 2246 2247 2248 2249 |
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) |
8f83f23e6
|
2250 |
sel.dport_mask = htons(0xffff); |
1da177e4c
|
2251 |
|
ea1107338
|
2252 |
sec_ctx = ext_hdrs[SADB_X_EXT_SEC_CTX - 1]; |
df71837d5
|
2253 |
if (sec_ctx != NULL) { |
87536a81e
|
2254 |
struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_KERNEL); |
df71837d5
|
2255 2256 2257 |
if (!uctx) return -ENOMEM; |
52a4c6404
|
2258 |
err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL); |
df71837d5
|
2259 |
kfree(uctx); |
df71837d5
|
2260 2261 |
if (err) return err; |
2db3e47e7
|
2262 |
} |
161a09e73
|
2263 |
|
8ca2e93b5
|
2264 |
xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN, |
03e1ad7b5
|
2265 2266 2267 |
pol->sadb_x_policy_dir - 1, &sel, pol_ctx, 1, &err); security_xfrm_policy_free(pol_ctx); |
1da177e4c
|
2268 2269 |
if (xp == NULL) return -ENOENT; |
ab5f5e8b1
|
2270 |
xfrm_audit_policy_delete(xp, err ? 0 : 1, |
2532386f4
|
2271 2272 |
audit_get_loginuid(current), audit_get_sessionid(current), 0); |
13fcfbb06
|
2273 2274 |
if (err) |
c8c05a8ee
|
2275 |
goto out; |
13fcfbb06
|
2276 |
|
26b15dad9
|
2277 |
c.seq = hdr->sadb_msg_seq; |
15e473046
|
2278 |
c.portid = hdr->sadb_msg_pid; |
1839faab9
|
2279 |
c.data.byid = 0; |
f60f6b8f7
|
2280 |
c.event = XFRM_MSG_DELPOLICY; |
26b15dad9
|
2281 |
km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c); |
c8c05a8ee
|
2282 |
out: |
26b15dad9
|
2283 |
xfrm_pol_put(xp); |
e4c172164
|
2284 2285 |
if (err == 0) xfrm_garbage_collect(net); |
26b15dad9
|
2286 2287 |
return err; } |
4c93fbb06
|
2288 |
static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struct sadb_msg *hdr, int dir) |
26b15dad9
|
2289 2290 2291 2292 2293 |
{ int err; struct sk_buff *out_skb; struct sadb_msg *out_hdr; err = 0; |
1da177e4c
|
2294 2295 2296 2297 2298 |
out_skb = pfkey_xfrm_policy2msg_prep(xp); if (IS_ERR(out_skb)) { err = PTR_ERR(out_skb); goto out; } |
55569ce25
|
2299 2300 2301 |
err = pfkey_xfrm_policy2msg(out_skb, xp, dir); if (err < 0) goto out; |
1da177e4c
|
2302 2303 2304 |
out_hdr = (struct sadb_msg *) out_skb->data; out_hdr->sadb_msg_version = hdr->sadb_msg_version; |
26b15dad9
|
2305 |
out_hdr->sadb_msg_type = hdr->sadb_msg_type; |
1da177e4c
|
2306 2307 2308 2309 |
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; |
07fb0f179
|
2310 |
pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp)); |
1da177e4c
|
2311 2312 2313 |
err = 0; out: |
1da177e4c
|
2314 2315 |
return err; } |
08de61bea
|
2316 2317 2318 |
#ifdef CONFIG_NET_KEY_MIGRATE static int pfkey_sockaddr_pair_size(sa_family_t family) { |
9e8b4ed8b
|
2319 |
return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2); |
08de61bea
|
2320 |
} |
13c1d1893
|
2321 |
static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len, |
08de61bea
|
2322 2323 2324 |
xfrm_address_t *saddr, xfrm_address_t *daddr, u16 *family) { |
5f95ac911
|
2325 |
int af, socklen; |
13c1d1893
|
2326 |
if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family)) |
08de61bea
|
2327 |
return -EINVAL; |
13c1d1893
|
2328 |
af = pfkey_sockaddr_extract(sa, saddr); |
5f95ac911
|
2329 2330 2331 2332 |
if (!af) return -EINVAL; socklen = pfkey_sockaddr_len(af); |
13c1d1893
|
2333 |
if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen), |
5f95ac911
|
2334 |
daddr) != af) |
08de61bea
|
2335 |
return -EINVAL; |
08de61bea
|
2336 |
|
5f95ac911
|
2337 |
*family = af; |
08de61bea
|
2338 2339 2340 2341 2342 2343 2344 2345 |
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; |
55569ce25
|
2346 |
int mode; |
08de61bea
|
2347 2348 2349 2350 2351 2352 |
if (len <= sizeof(struct sadb_x_ipsecrequest) || len < rq1->sadb_x_ipsecrequest_len) return -EINVAL; /* old endoints */ |
13c1d1893
|
2353 2354 2355 |
err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1), rq1->sadb_x_ipsecrequest_len, &m->old_saddr, &m->old_daddr, |
08de61bea
|
2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 |
&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 */ |
13c1d1893
|
2368 2369 2370 |
err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1), rq2->sadb_x_ipsecrequest_len, &m->new_saddr, &m->new_daddr, |
08de61bea
|
2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 |
&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; |
55569ce25
|
2381 2382 2383 |
if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0) return -EINVAL; m->mode = mode; |
08de61bea
|
2384 2385 2386 2387 2388 2389 2390 |
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, |
4c93fbb06
|
2391 |
const struct sadb_msg *hdr, void * const *ext_hdrs) |
08de61bea
|
2392 2393 2394 2395 |
{ int i, len, ret, err = -EINVAL; u8 dir; struct sadb_address *sa; |
13c1d1893
|
2396 |
struct sadb_x_kmaddress *kma; |
08de61bea
|
2397 2398 2399 2400 |
struct sadb_x_policy *pol; struct sadb_x_ipsecrequest *rq; struct xfrm_selector sel; struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
13c1d1893
|
2401 |
struct xfrm_kmaddress k; |
8d549c4f5
|
2402 |
struct net *net = sock_net(sk); |
08de61bea
|
2403 2404 |
if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1], |
13c1d1893
|
2405 |
ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) || |
08de61bea
|
2406 2407 2408 2409 |
!ext_hdrs[SADB_X_EXT_POLICY - 1]) { err = -EINVAL; goto out; } |
13c1d1893
|
2410 |
kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1]; |
08de61bea
|
2411 |
pol = ext_hdrs[SADB_X_EXT_POLICY - 1]; |
08de61bea
|
2412 2413 2414 2415 2416 |
if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) { err = -EINVAL; goto out; } |
13c1d1893
|
2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 |
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; } } |
08de61bea
|
2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 |
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) |
582ee43da
|
2438 |
sel.sport_mask = htons(0xffff); |
08de61bea
|
2439 2440 2441 2442 2443 2444 2445 2446 |
/* 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) |
582ee43da
|
2447 |
sel.dport_mask = htons(0xffff); |
08de61bea
|
2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 |
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; } |
13c1d1893
|
2471 |
return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i, |
8d549c4f5
|
2472 |
kma ? &k : NULL, net); |
08de61bea
|
2473 2474 2475 2476 2477 2478 |
out: return err; } #else static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, |
7f6daa635
|
2479 |
const struct sadb_msg *hdr, void * const *ext_hdrs) |
08de61bea
|
2480 2481 2482 2483 |
{ return -ENOPROTOOPT; } #endif |
4c93fbb06
|
2484 |
static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4c
|
2485 |
{ |
07fb0f179
|
2486 |
struct net *net = sock_net(sk); |
77d8d7a68
|
2487 |
unsigned int dir; |
215a2dd3b
|
2488 |
int err = 0, delete; |
1da177e4c
|
2489 2490 |
struct sadb_x_policy *pol; struct xfrm_policy *xp; |
26b15dad9
|
2491 |
struct km_event c; |
1da177e4c
|
2492 2493 2494 |
if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL) return -EINVAL; |
77d8d7a68
|
2495 2496 2497 |
dir = xfrm_policy_id2dir(pol->sadb_x_policy_id); if (dir >= XFRM_POLICY_MAX) return -EINVAL; |
215a2dd3b
|
2498 |
delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2); |
8ca2e93b5
|
2499 |
xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN, |
bd55775c8
|
2500 |
dir, pol->sadb_x_policy_id, delete, &err); |
1da177e4c
|
2501 2502 |
if (xp == NULL) return -ENOENT; |
215a2dd3b
|
2503 |
if (delete) { |
ab5f5e8b1
|
2504 |
xfrm_audit_policy_delete(xp, err ? 0 : 1, |
2532386f4
|
2505 2506 |
audit_get_loginuid(current), audit_get_sessionid(current), 0); |
1da177e4c
|
2507 |
|
215a2dd3b
|
2508 2509 2510 |
if (err) goto out; c.seq = hdr->sadb_msg_seq; |
15e473046
|
2511 |
c.portid = hdr->sadb_msg_pid; |
bf08867f9
|
2512 |
c.data.byid = 1; |
f60f6b8f7
|
2513 |
c.event = XFRM_MSG_DELPOLICY; |
77d8d7a68
|
2514 |
km_policy_notify(xp, dir, &c); |
26b15dad9
|
2515 |
} else { |
77d8d7a68
|
2516 |
err = key_pol_get_resp(sk, xp, hdr, dir); |
1da177e4c
|
2517 |
} |
1da177e4c
|
2518 |
|
215a2dd3b
|
2519 |
out: |
1da177e4c
|
2520 |
xfrm_pol_put(xp); |
e4c172164
|
2521 2522 |
if (delete && err == 0) xfrm_garbage_collect(net); |
1da177e4c
|
2523 2524 2525 2526 2527 |
return err; } static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr) { |
83321d6b9
|
2528 |
struct pfkey_sock *pfk = ptr; |
1da177e4c
|
2529 2530 |
struct sk_buff *out_skb; struct sadb_msg *out_hdr; |
55569ce25
|
2531 |
int err; |
1da177e4c
|
2532 |
|
83321d6b9
|
2533 2534 |
if (!pfkey_can_dump(&pfk->sk)) return -ENOBUFS; |
1da177e4c
|
2535 2536 2537 |
out_skb = pfkey_xfrm_policy2msg_prep(xp); if (IS_ERR(out_skb)) return PTR_ERR(out_skb); |
55569ce25
|
2538 2539 2540 |
err = pfkey_xfrm_policy2msg(out_skb, xp, dir); if (err < 0) return err; |
1da177e4c
|
2541 2542 |
out_hdr = (struct sadb_msg *) out_skb->data; |
83321d6b9
|
2543 |
out_hdr->sadb_msg_version = pfk->dump.msg_version; |
1da177e4c
|
2544 2545 2546 |
out_hdr->sadb_msg_type = SADB_X_SPDDUMP; out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; out_hdr->sadb_msg_errno = 0; |
12a169e7d
|
2547 |
out_hdr->sadb_msg_seq = count + 1; |
15e473046
|
2548 |
out_hdr->sadb_msg_pid = pfk->dump.msg_portid; |
12a169e7d
|
2549 2550 2551 |
if (pfk->dump.skb) pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE, |
07fb0f179
|
2552 |
&pfk->sk, sock_net(&pfk->sk)); |
12a169e7d
|
2553 |
pfk->dump.skb = out_skb; |
1da177e4c
|
2554 2555 |
return 0; } |
83321d6b9
|
2556 2557 |
static int pfkey_dump_sp(struct pfkey_sock *pfk) { |
07fb0f179
|
2558 2559 |
struct net *net = sock_net(&pfk->sk); return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk); |
83321d6b9
|
2560 2561 2562 2563 |
} static void pfkey_dump_sp_done(struct pfkey_sock *pfk) { |
283bc9f35
|
2564 2565 2566 |
struct net *net = sock_net((struct sock *)pfk); xfrm_policy_walk_done(&pfk->dump.u.policy, net); |
83321d6b9
|
2567 |
} |
4c93fbb06
|
2568 |
static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
1da177e4c
|
2569 |
{ |
83321d6b9
|
2570 |
struct pfkey_sock *pfk = pfkey_sk(sk); |
4c563f766
|
2571 |
|
83321d6b9
|
2572 2573 |
if (pfk->dump.dump != NULL) return -EBUSY; |
1da177e4c
|
2574 |
|
83321d6b9
|
2575 |
pfk->dump.msg_version = hdr->sadb_msg_version; |
15e473046
|
2576 |
pfk->dump.msg_portid = hdr->sadb_msg_pid; |
83321d6b9
|
2577 2578 2579 2580 2581 |
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); |
1da177e4c
|
2582 |
} |
214e005bc
|
2583 |
static int key_notify_policy_flush(const struct km_event *c) |
1da177e4c
|
2584 2585 |
{ struct sk_buff *skb_out; |
26b15dad9
|
2586 |
struct sadb_msg *hdr; |
1da177e4c
|
2587 |
|
26b15dad9
|
2588 |
skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC); |
1da177e4c
|
2589 2590 |
if (!skb_out) return -ENOBUFS; |
26b15dad9
|
2591 |
hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg)); |
151bb0ffe
|
2592 |
hdr->sadb_msg_type = SADB_X_SPDFLUSH; |
26b15dad9
|
2593 |
hdr->sadb_msg_seq = c->seq; |
15e473046
|
2594 |
hdr->sadb_msg_pid = c->portid; |
26b15dad9
|
2595 2596 |
hdr->sadb_msg_version = PF_KEY_V2; hdr->sadb_msg_errno = (uint8_t) 0; |
85dfb745e
|
2597 |
hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC; |
26b15dad9
|
2598 |
hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t)); |
a5cc68f3d
|
2599 |
hdr->sadb_msg_reserved = 0; |
07fb0f179
|
2600 |
pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net); |
26b15dad9
|
2601 |
return 0; |
1da177e4c
|
2602 |
|
26b15dad9
|
2603 |
} |
4c93fbb06
|
2604 |
static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs) |
26b15dad9
|
2605 |
{ |
07fb0f179
|
2606 |
struct net *net = sock_net(sk); |
26b15dad9
|
2607 |
struct km_event c; |
161a09e73
|
2608 |
struct xfrm_audit audit_info; |
8be987d73
|
2609 |
int err, err2; |
1da177e4c
|
2610 |
|
0c11b9428
|
2611 |
audit_info.loginuid = audit_get_loginuid(current); |
2532386f4
|
2612 |
audit_info.sessionid = audit_get_sessionid(current); |
161a09e73
|
2613 |
audit_info.secid = 0; |
07fb0f179
|
2614 |
err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info); |
8be987d73
|
2615 |
err2 = unicast_flush_resp(sk, hdr); |
2f1eb65f3
|
2616 2617 2618 2619 2620 |
if (err || err2) { if (err == -ESRCH) /* empty table - old silent behavior */ return 0; return err; } |
8be987d73
|
2621 |
|
f7b6983f0
|
2622 |
c.data.type = XFRM_POLICY_TYPE_MAIN; |
f60f6b8f7
|
2623 |
c.event = XFRM_MSG_FLUSHPOLICY; |
15e473046
|
2624 |
c.portid = hdr->sadb_msg_pid; |
26b15dad9
|
2625 |
c.seq = hdr->sadb_msg_seq; |
07fb0f179
|
2626 |
c.net = net; |
26b15dad9
|
2627 |
km_policy_notify(NULL, 0, &c); |
1da177e4c
|
2628 2629 2630 2631 2632 |
return 0; } typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb, |
4c93fbb06
|
2633 |
const struct sadb_msg *hdr, void * const *ext_hdrs); |
8603b9556
|
2634 |
static const pfkey_handler pfkey_funcs[SADB_MAX + 1] = { |
1da177e4c
|
2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 |
[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, |
08de61bea
|
2657 |
[SADB_X_MIGRATE] = pfkey_migrate, |
1da177e4c
|
2658 |
}; |
4c93fbb06
|
2659 |
static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr) |
1da177e4c
|
2660 2661 2662 2663 2664 |
{ void *ext_hdrs[SADB_EXT_MAX]; int err; pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, |
07fb0f179
|
2665 |
BROADCAST_PROMISC_ONLY, NULL, sock_net(sk)); |
1da177e4c
|
2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 |
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; } |
4c93fbb06
|
2703 2704 |
static inline int aalg_tmpl_set(const struct xfrm_tmpl *t, const struct xfrm_algo_desc *d) |
1da177e4c
|
2705 |
{ |
f398035f2
|
2706 2707 2708 2709 2710 2711 |
unsigned int id = d->desc.sadb_alg_id; if (id >= sizeof(t->aalgos) * 8) return 0; return (t->aalgos >> id) & 1; |
1da177e4c
|
2712 |
} |
4c93fbb06
|
2713 2714 |
static inline int ealg_tmpl_set(const struct xfrm_tmpl *t, const struct xfrm_algo_desc *d) |
1da177e4c
|
2715 |
{ |
f398035f2
|
2716 2717 2718 2719 2720 2721 |
unsigned int id = d->desc.sadb_alg_id; if (id >= sizeof(t->ealgos) * 8) return 0; return (t->ealgos >> id) & 1; |
1da177e4c
|
2722 |
} |
4c93fbb06
|
2723 |
static int count_ah_combs(const struct xfrm_tmpl *t) |
1da177e4c
|
2724 2725 2726 2727 |
{ int i, sz = 0; for (i = 0; ; i++) { |
4c93fbb06
|
2728 |
const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); |
1da177e4c
|
2729 2730 |
if (!aalg) break; |
7e50f84c9
|
2731 2732 |
if (!aalg->pfkey_supported) continue; |
1da177e4c
|
2733 2734 2735 2736 2737 |
if (aalg_tmpl_set(t, aalg) && aalg->available) sz += sizeof(struct sadb_comb); } return sz + sizeof(struct sadb_prop); } |
4c93fbb06
|
2738 |
static int count_esp_combs(const struct xfrm_tmpl *t) |
1da177e4c
|
2739 2740 2741 2742 |
{ int i, k, sz = 0; for (i = 0; ; i++) { |
4c93fbb06
|
2743 |
const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); |
1da177e4c
|
2744 2745 |
if (!ealg) break; |
8ff24541d
|
2746 |
|
7e50f84c9
|
2747 2748 |
if (!ealg->pfkey_supported) continue; |
1da177e4c
|
2749 2750 |
if (!(ealg_tmpl_set(t, ealg) && ealg->available)) continue; |
8ff24541d
|
2751 |
|
1da177e4c
|
2752 |
for (k = 1; ; k++) { |
4c93fbb06
|
2753 |
const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); |
1da177e4c
|
2754 2755 |
if (!aalg) break; |
8ff24541d
|
2756 |
|
7e50f84c9
|
2757 2758 |
if (!aalg->pfkey_supported) continue; |
1da177e4c
|
2759 2760 2761 2762 2763 2764 |
if (aalg_tmpl_set(t, aalg) && aalg->available) sz += sizeof(struct sadb_comb); } } return sz + sizeof(struct sadb_prop); } |
4c93fbb06
|
2765 |
static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) |
1da177e4c
|
2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 |
{ 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++) { |
4c93fbb06
|
2777 |
const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); |
1da177e4c
|
2778 2779 |
if (!aalg) break; |
7e50f84c9
|
2780 2781 |
if (!aalg->pfkey_supported) continue; |
1da177e4c
|
2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 |
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; } } } |
4c93fbb06
|
2797 |
static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) |
1da177e4c
|
2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 |
{ 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++) { |
4c93fbb06
|
2809 |
const struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); |
1da177e4c
|
2810 2811 |
if (!ealg) break; |
8ff24541d
|
2812 |
|
7e50f84c9
|
2813 2814 |
if (!ealg->pfkey_supported) continue; |
1da177e4c
|
2815 2816 |
if (!(ealg_tmpl_set(t, ealg) && ealg->available)) continue; |
8ff24541d
|
2817 |
|
1da177e4c
|
2818 2819 |
for (k = 1; ; k++) { struct sadb_comb *c; |
4c93fbb06
|
2820 |
const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); |
1da177e4c
|
2821 2822 |
if (!aalg) break; |
7e50f84c9
|
2823 2824 |
if (!aalg->pfkey_supported) continue; |
1da177e4c
|
2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 |
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; } } } |
214e005bc
|
2843 |
static int key_notify_policy_expire(struct xfrm_policy *xp, const struct km_event *c) |
26b15dad9
|
2844 2845 2846 |
{ return 0; } |
214e005bc
|
2847 |
static int key_notify_sa_expire(struct xfrm_state *x, const struct km_event *c) |
1da177e4c
|
2848 2849 2850 |
{ struct sk_buff *out_skb; struct sadb_msg *out_hdr; |
26b15dad9
|
2851 2852 |
int hard; int hsc; |
bf08867f9
|
2853 |
hard = c->data.hard; |
26b15dad9
|
2854 2855 2856 2857 |
if (hard) hsc = 2; else hsc = 1; |
1da177e4c
|
2858 |
|
050f009e1
|
2859 |
out_skb = pfkey_xfrm_state2msg_expire(x, hsc); |
1da177e4c
|
2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 |
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; |
07fb0f179
|
2871 |
pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x)); |
1da177e4c
|
2872 2873 |
return 0; } |
214e005bc
|
2874 |
static int pfkey_send_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad9
|
2875 |
{ |
07fb0f179
|
2876 |
struct net *net = x ? xs_net(x) : c->net; |
3fa87a321
|
2877 2878 2879 |
struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); if (atomic_read(&net_pfkey->socks_nr) == 0) |
99c6f60e7
|
2880 |
return 0; |
26b15dad9
|
2881 |
switch (c->event) { |
f60f6b8f7
|
2882 |
case XFRM_MSG_EXPIRE: |
26b15dad9
|
2883 |
return key_notify_sa_expire(x, c); |
f60f6b8f7
|
2884 2885 2886 |
case XFRM_MSG_DELSA: case XFRM_MSG_NEWSA: case XFRM_MSG_UPDSA: |
26b15dad9
|
2887 |
return key_notify_sa(x, c); |
f60f6b8f7
|
2888 |
case XFRM_MSG_FLUSHSA: |
26b15dad9
|
2889 |
return key_notify_sa_flush(c); |
d51d081d6
|
2890 2891 |
case XFRM_MSG_NEWAE: /* not yet supported */ break; |
26b15dad9
|
2892 |
default: |
207024b94
|
2893 2894 |
pr_err("pfkey: Unknown SA event %d ", c->event); |
26b15dad9
|
2895 2896 2897 2898 2899 |
break; } return 0; } |
214e005bc
|
2900 |
static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad9
|
2901 |
{ |
f7b6983f0
|
2902 2903 |
if (xp && xp->type != XFRM_POLICY_TYPE_MAIN) return 0; |
26b15dad9
|
2904 |
switch (c->event) { |
f60f6b8f7
|
2905 |
case XFRM_MSG_POLEXPIRE: |
26b15dad9
|
2906 |
return key_notify_policy_expire(xp, c); |
f60f6b8f7
|
2907 2908 2909 |
case XFRM_MSG_DELPOLICY: case XFRM_MSG_NEWPOLICY: case XFRM_MSG_UPDPOLICY: |
26b15dad9
|
2910 |
return key_notify_policy(xp, dir, c); |
f60f6b8f7
|
2911 |
case XFRM_MSG_FLUSHPOLICY: |
f7b6983f0
|
2912 2913 |
if (c->data.type != XFRM_POLICY_TYPE_MAIN) break; |
26b15dad9
|
2914 2915 |
return key_notify_policy_flush(c); default: |
207024b94
|
2916 2917 |
pr_err("pfkey: Unknown policy event %d ", c->event); |
26b15dad9
|
2918 2919 2920 2921 2922 |
break; } return 0; } |
1da177e4c
|
2923 2924 2925 |
static u32 get_acqseq(void) { u32 res; |
28aecb9d7
|
2926 |
static atomic_t acqseq; |
1da177e4c
|
2927 |
|
28aecb9d7
|
2928 2929 2930 |
do { res = atomic_inc_return(&acqseq); } while (!res); |
1da177e4c
|
2931 2932 |
return res; } |
0f24558e9
|
2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 |
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; } |
65e0736bc
|
2950 |
static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp) |
1da177e4c
|
2951 2952 2953 2954 2955 |
{ struct sk_buff *skb; struct sadb_msg *hdr; struct sadb_address *addr; struct sadb_x_policy *pol; |
1da177e4c
|
2956 2957 |
int sockaddr_size; int size; |
4e2ba18ea
|
2958 2959 2960 |
struct sadb_x_sec_ctx *sec_ctx; struct xfrm_sec_ctx *xfrm_ctx; int ctx_size = 0; |
8ff24541d
|
2961 |
|
1da177e4c
|
2962 2963 2964 2965 2966 2967 2968 2969 |
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); |
8ff24541d
|
2970 |
|
1da177e4c
|
2971 2972 2973 2974 |
if (x->id.proto == IPPROTO_AH) size += count_ah_combs(t); else if (x->id.proto == IPPROTO_ESP) size += count_esp_combs(t); |
4e2ba18ea
|
2975 2976 2977 2978 |
if ((xfrm_ctx = x->security)) { ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len); size += sizeof(struct sadb_x_sec_ctx) + ctx_size; } |
1da177e4c
|
2979 2980 2981 |
skb = alloc_skb(size + 16, GFP_ATOMIC); if (skb == NULL) return -ENOMEM; |
8ff24541d
|
2982 |
|
1da177e4c
|
2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 |
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 */ |
8ff24541d
|
2994 |
addr = (struct sadb_address*) skb_put(skb, |
1da177e4c
|
2995 |
sizeof(struct sadb_address)+sockaddr_size); |
8ff24541d
|
2996 |
addr->sadb_address_len = |
1da177e4c
|
2997 2998 2999 3000 3001 |
(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; |
e5b56652c
|
3002 3003 3004 3005 3006 |
addr->sadb_address_prefixlen = pfkey_sockaddr_fill(&x->props.saddr, 0, (struct sockaddr *) (addr + 1), x->props.family); if (!addr->sadb_address_prefixlen) |
1da177e4c
|
3007 |
BUG(); |
8ff24541d
|
3008 |
|
1da177e4c
|
3009 |
/* dst address */ |
8ff24541d
|
3010 |
addr = (struct sadb_address*) skb_put(skb, |
1da177e4c
|
3011 3012 3013 3014 3015 3016 3017 |
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; |
e5b56652c
|
3018 3019 3020 3021 3022 |
addr->sadb_address_prefixlen = pfkey_sockaddr_fill(&x->id.daddr, 0, (struct sockaddr *) (addr + 1), x->props.family); if (!addr->sadb_address_prefixlen) |
1da177e4c
|
3023 3024 3025 3026 3027 3028 |
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; |
65e0736bc
|
3029 |
pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1; |
ff862a466
|
3030 |
pol->sadb_x_policy_reserved = 0; |
1da177e4c
|
3031 |
pol->sadb_x_policy_id = xp->index; |
ff862a466
|
3032 |
pol->sadb_x_policy_priority = xp->priority; |
1da177e4c
|
3033 3034 3035 3036 3037 3038 |
/* 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); |
4e2ba18ea
|
3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 |
/* 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); } |
07fb0f179
|
3052 |
return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x)); |
1da177e4c
|
3053 |
} |
cb969f072
|
3054 |
static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt, |
8ff24541d
|
3055 |
u8 *data, int len, int *dir) |
1da177e4c
|
3056 |
{ |
07fb0f179
|
3057 |
struct net *net = sock_net(sk); |
1da177e4c
|
3058 3059 |
struct xfrm_policy *xp; struct sadb_x_policy *pol = (struct sadb_x_policy*)data; |
df71837d5
|
3060 |
struct sadb_x_sec_ctx *sec_ctx; |
1da177e4c
|
3061 |
|
cb969f072
|
3062 |
switch (sk->sk_family) { |
1da177e4c
|
3063 3064 3065 3066 3067 3068 |
case AF_INET: if (opt != IP_IPSEC_POLICY) { *dir = -EOPNOTSUPP; return NULL; } break; |
dfd56b8b3
|
3069 |
#if IS_ENABLED(CONFIG_IPV6) |
1da177e4c
|
3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 |
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; |
07fb0f179
|
3089 |
xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4c
|
3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 |
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; |
cb969f072
|
3102 |
xp->family = sk->sk_family; |
1da177e4c
|
3103 3104 3105 3106 3107 |
xp->xfrm_nr = 0; if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC && (*dir = parse_ipsecrequests(xp, pol)) < 0) goto out; |
df71837d5
|
3108 3109 3110 3111 3112 3113 3114 3115 3116 |
/* 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 + |
cb969f072
|
3117 3118 |
sec_ctx->sadb_x_sec_len) { *dir = -EINVAL; |
df71837d5
|
3119 |
goto out; |
cb969f072
|
3120 |
} |
df71837d5
|
3121 3122 |
if ((*dir = verify_sec_ctx_len(p))) goto out; |
87536a81e
|
3123 |
uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC); |
52a4c6404
|
3124 |
*dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC); |
df71837d5
|
3125 3126 3127 3128 3129 |
kfree(uctx); if (*dir) goto out; } |
1da177e4c
|
3130 3131 3132 3133 |
*dir = pol->sadb_x_policy_dir-1; return xp; out: |
70e90679f
|
3134 |
xp->walk.dead = 1; |
64c31b3f7
|
3135 |
xfrm_policy_destroy(xp); |
1da177e4c
|
3136 3137 |
return NULL; } |
5d36b1803
|
3138 |
static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4c
|
3139 3140 3141 3142 3143 3144 |
{ struct sk_buff *skb; struct sadb_msg *hdr; struct sadb_sa *sa; struct sadb_address *addr; struct sadb_x_nat_t_port *n_port; |
1da177e4c
|
3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 |
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) */ |
8ff24541d
|
3167 |
|
1da177e4c
|
3168 3169 3170 3171 3172 |
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); |
8ff24541d
|
3173 |
|
1da177e4c
|
3174 3175 3176 |
skb = alloc_skb(size + 16, GFP_ATOMIC); if (skb == NULL) return -ENOMEM; |
8ff24541d
|
3177 |
|
1da177e4c
|
3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 |
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); |
8ff24541d
|
3202 |
addr->sadb_address_len = |
1da177e4c
|
3203 3204 3205 3206 3207 |
(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; |
e5b56652c
|
3208 3209 3210 3211 3212 |
addr->sadb_address_prefixlen = pfkey_sockaddr_fill(&x->props.saddr, 0, (struct sockaddr *) (addr + 1), x->props.family); if (!addr->sadb_address_prefixlen) |
1da177e4c
|
3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 |
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); |
8ff24541d
|
3225 |
addr->sadb_address_len = |
1da177e4c
|
3226 3227 3228 3229 3230 |
(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; |
e5b56652c
|
3231 3232 3233 3234 3235 |
addr->sadb_address_prefixlen = pfkey_sockaddr_fill(ipaddr, 0, (struct sockaddr *) (addr + 1), x->props.family); if (!addr->sadb_address_prefixlen) |
1da177e4c
|
3236 3237 3238 3239 3240 3241 3242 3243 |
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; |
07fb0f179
|
3244 |
return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x)); |
1da177e4c
|
3245 |
} |
08de61bea
|
3246 3247 |
#ifdef CONFIG_NET_KEY_MIGRATE static int set_sadb_address(struct sk_buff *skb, int sasize, int type, |
183cad127
|
3248 |
const struct xfrm_selector *sel) |
08de61bea
|
3249 3250 |
{ struct sadb_address *addr; |
08de61bea
|
3251 3252 3253 3254 3255 3256 3257 3258 |
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: |
e5b56652c
|
3259 3260 3261 3262 |
addr->sadb_address_prefixlen = sel->prefixlen_s; pfkey_sockaddr_fill(&sel->saddr, 0, (struct sockaddr *)(addr + 1), sel->family); |
08de61bea
|
3263 3264 |
break; case SADB_EXT_ADDRESS_DST: |
e5b56652c
|
3265 3266 3267 3268 |
addr->sadb_address_prefixlen = sel->prefixlen_d; pfkey_sockaddr_fill(&sel->daddr, 0, (struct sockaddr *)(addr + 1), sel->family); |
08de61bea
|
3269 3270 3271 3272 3273 3274 3275 |
break; default: return -EINVAL; } return 0; } |
13c1d1893
|
3276 |
|
183cad127
|
3277 |
static int set_sadb_kmaddress(struct sk_buff *skb, const struct xfrm_kmaddress *k) |
13c1d1893
|
3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 |
{ 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; } |
08de61bea
|
3301 3302 3303 |
static int set_ipsecrequest(struct sk_buff *skb, uint8_t proto, uint8_t mode, int level, uint32_t reqid, uint8_t family, |
183cad127
|
3304 |
const xfrm_address_t *src, const xfrm_address_t *dst) |
08de61bea
|
3305 3306 |
{ struct sadb_x_ipsecrequest *rq; |
e5b56652c
|
3307 3308 |
u8 *sa; int socklen = pfkey_sockaddr_len(family); |
08de61bea
|
3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 |
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; |
e5b56652c
|
3321 3322 3323 |
sa = (u8 *) (rq + 1); if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) || !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family)) |
08de61bea
|
3324 |
return -EINVAL; |
08de61bea
|
3325 3326 3327 3328 3329 3330 |
return 0; } #endif #ifdef CONFIG_NET_KEY_MIGRATE |
183cad127
|
3331 3332 3333 |
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) |
08de61bea
|
3334 3335 3336 3337 3338 3339 3340 3341 |
{ 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; |
183cad127
|
3342 |
const struct xfrm_migrate *mp; |
08de61bea
|
3343 3344 3345 3346 3347 3348 |
if (type != XFRM_POLICY_TYPE_MAIN) return 0; if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH) return -EINVAL; |
13c1d1893
|
3349 3350 3351 3352 3353 |
if (k != NULL) { /* addresses for KM */ size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) + pfkey_sockaddr_pair_size(k->family)); } |
08de61bea
|
3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 |
/* 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; |
13c1d1893
|
3389 3390 |
/* Addresses to be used by KM for negotiation, if ext is available */ if (k != NULL && (set_sadb_kmaddress(skb, k) < 0)) |
89eb06f11
|
3391 |
goto err; |
13c1d1893
|
3392 |
|
08de61bea
|
3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 |
/* 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; |
ff862a466
|
3405 |
pol->sadb_x_policy_reserved = 0; |
08de61bea
|
3406 3407 3408 3409 3410 |
pol->sadb_x_policy_id = 0; pol->sadb_x_policy_priority = 0; for (i = 0, mp = m; i < num_bundles; i++, mp++) { /* old ipsecrequest */ |
55569ce25
|
3411 3412 |
int mode = pfkey_mode_from_xfrm(mp->mode); if (mode < 0) |
d4782c323
|
3413 |
goto err; |
55569ce25
|
3414 |
if (set_ipsecrequest(skb, mp->proto, mode, |
08de61bea
|
3415 3416 |
(mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), mp->reqid, mp->old_family, |
d4782c323
|
3417 3418 |
&mp->old_saddr, &mp->old_daddr) < 0) goto err; |
08de61bea
|
3419 3420 |
/* new ipsecrequest */ |
55569ce25
|
3421 |
if (set_ipsecrequest(skb, mp->proto, mode, |
08de61bea
|
3422 3423 |
(mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE), mp->reqid, mp->new_family, |
d4782c323
|
3424 3425 |
&mp->new_saddr, &mp->new_daddr) < 0) goto err; |
08de61bea
|
3426 3427 3428 |
} /* broadcast migrate message to sockets */ |
07fb0f179
|
3429 |
pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net); |
08de61bea
|
3430 3431 |
return 0; |
d4782c323
|
3432 3433 3434 3435 |
err: kfree_skb(skb); return -EINVAL; |
08de61bea
|
3436 3437 |
} #else |
183cad127
|
3438 3439 3440 |
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) |
08de61bea
|
3441 3442 3443 3444 |
{ return -ENOPROTOOPT; } #endif |
1da177e4c
|
3445 3446 3447 3448 3449 3450 3451 |
static int pfkey_sendmsg(struct kiocb *kiocb, struct socket *sock, struct msghdr *msg, size_t len) { struct sock *sk = sock->sk; struct sk_buff *skb = NULL; struct sadb_msg *hdr = NULL; int err; |
283bc9f35
|
3452 |
struct net *net = sock_net(sk); |
1da177e4c
|
3453 3454 3455 3456 3457 3458 |
err = -EOPNOTSUPP; if (msg->msg_flags & MSG_OOB) goto out; err = -EMSGSIZE; |
95c961747
|
3459 |
if ((unsigned int)len > sk->sk_sndbuf - 32) |
1da177e4c
|
3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 |
goto out; err = -ENOBUFS; skb = alloc_skb(len, GFP_KERNEL); if (skb == NULL) goto out; err = -EFAULT; if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len)) goto out; hdr = pfkey_get_base_msg(skb, &err); if (!hdr) goto out; |
283bc9f35
|
3474 |
mutex_lock(&net->xfrm.xfrm_cfg_mutex); |
1da177e4c
|
3475 |
err = pfkey_process(sk, skb, hdr); |
283bc9f35
|
3476 |
mutex_unlock(&net->xfrm.xfrm_cfg_mutex); |
1da177e4c
|
3477 3478 3479 3480 |
out: if (err && hdr && pfkey_error(hdr, err, sk) == 0) err = 0; |
6f9610686
|
3481 |
kfree_skb(skb); |
1da177e4c
|
3482 3483 3484 3485 3486 3487 3488 3489 3490 |
return err ? : len; } static int pfkey_recvmsg(struct kiocb *kiocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) { struct sock *sk = sock->sk; |
83321d6b9
|
3491 |
struct pfkey_sock *pfk = pfkey_sk(sk); |
1da177e4c
|
3492 3493 3494 3495 3496 3497 |
struct sk_buff *skb; int copied, err; err = -EINVAL; if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT)) goto out; |
1da177e4c
|
3498 3499 3500 3501 3502 3503 3504 3505 3506 |
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; } |
badff6d01
|
3507 |
skb_reset_transport_header(skb); |
1da177e4c
|
3508 3509 3510 |
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); if (err) goto out_free; |
3b885787e
|
3511 |
sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4c
|
3512 3513 |
err = (flags & MSG_TRUNC) ? skb->len : copied; |
83321d6b9
|
3514 3515 3516 |
if (pfk->dump.dump != NULL && 3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) pfkey_do_dump(pfk); |
1da177e4c
|
3517 3518 3519 3520 3521 |
out_free: skb_free_datagram(sk, skb); out: return err; } |
90ddc4f04
|
3522 |
static const struct proto_ops pfkey_ops = { |
1da177e4c
|
3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 |
.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, }; |
ec1b4cf74
|
3545 |
static const struct net_proto_family pfkey_family_ops = { |
1da177e4c
|
3546 3547 3548 3549 3550 3551 |
.family = PF_KEY, .create = pfkey_create, .owner = THIS_MODULE, }; #ifdef CONFIG_PROC_FS |
bd2f74765
|
3552 |
static int pfkey_seq_show(struct seq_file *f, void *v) |
1da177e4c
|
3553 |
{ |
27b5b8657
|
3554 |
struct sock *s = sk_entry(v); |
1da177e4c
|
3555 |
|
bd2f74765
|
3556 3557 3558 3559 |
if (v == SEQ_START_TOKEN) seq_printf(f ,"sk RefCnt Rmem Wmem User Inode "); else |
71338aa7d
|
3560 3561 |
seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu ", |
1da177e4c
|
3562 3563 |
s, atomic_read(&s->sk_refcnt), |
31e6d363a
|
3564 3565 |
sk_rmem_alloc_get(s), sk_wmem_alloc_get(s), |
a7cb5a49b
|
3566 |
from_kuid_munged(seq_user_ns(f), sock_i_uid(s)), |
1da177e4c
|
3567 3568 |
sock_i_ino(s) ); |
bd2f74765
|
3569 3570 3571 3572 |
return 0; } static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos) |
ada440e3b
|
3573 |
__acquires(rcu) |
bd2f74765
|
3574 |
{ |
7013ec30e
|
3575 |
struct net *net = seq_file_net(f); |
3fa87a321
|
3576 |
struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
1da177e4c
|
3577 |
|
7f6b9dbd5
|
3578 3579 |
rcu_read_lock(); return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos); |
bd2f74765
|
3580 3581 3582 3583 |
} static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos) { |
7013ec30e
|
3584 |
struct net *net = seq_file_net(f); |
3fa87a321
|
3585 |
struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
7f6b9dbd5
|
3586 |
return seq_hlist_next_rcu(v, &net_pfkey->table, ppos); |
bd2f74765
|
3587 |
} |
1da177e4c
|
3588 |
|
bd2f74765
|
3589 |
static void pfkey_seq_stop(struct seq_file *f, void *v) |
ada440e3b
|
3590 |
__releases(rcu) |
bd2f74765
|
3591 |
{ |
7f6b9dbd5
|
3592 |
rcu_read_unlock(); |
bd2f74765
|
3593 |
} |
1da177e4c
|
3594 |
|
98147d527
|
3595 |
static const struct seq_operations pfkey_seq_ops = { |
bd2f74765
|
3596 3597 3598 3599 3600 |
.start = pfkey_seq_start, .next = pfkey_seq_next, .stop = pfkey_seq_stop, .show = pfkey_seq_show, }; |
1da177e4c
|
3601 |
|
bd2f74765
|
3602 3603 |
static int pfkey_seq_open(struct inode *inode, struct file *file) { |
7013ec30e
|
3604 3605 |
return seq_open_net(inode, file, &pfkey_seq_ops, sizeof(struct seq_net_private)); |
1da177e4c
|
3606 |
} |
61145aa1a
|
3607 |
|
5ca1b998d
|
3608 |
static const struct file_operations pfkey_proc_ops = { |
bd2f74765
|
3609 3610 3611 |
.open = pfkey_seq_open, .read = seq_read, .llseek = seq_lseek, |
7013ec30e
|
3612 |
.release = seq_release_net, |
bd2f74765
|
3613 |
}; |
7013ec30e
|
3614 |
static int __net_init pfkey_init_proc(struct net *net) |
61145aa1a
|
3615 |
{ |
bd2f74765
|
3616 |
struct proc_dir_entry *e; |
d4beaa66a
|
3617 |
e = proc_create("pfkey", 0, net->proc_net, &pfkey_proc_ops); |
bd2f74765
|
3618 |
if (e == NULL) |
61145aa1a
|
3619 |
return -ENOMEM; |
bd2f74765
|
3620 |
|
bd2f74765
|
3621 |
return 0; |
61145aa1a
|
3622 |
} |
2c8c1e729
|
3623 |
static void __net_exit pfkey_exit_proc(struct net *net) |
61145aa1a
|
3624 |
{ |
ece31ffd5
|
3625 |
remove_proc_entry("pfkey", net->proc_net); |
61145aa1a
|
3626 3627 |
} #else |
2c8c1e729
|
3628 |
static inline int pfkey_init_proc(struct net *net) |
61145aa1a
|
3629 3630 3631 |
{ return 0; } |
2c8c1e729
|
3632 |
static inline void pfkey_exit_proc(struct net *net) |
61145aa1a
|
3633 3634 |
{ } |
1da177e4c
|
3635 3636 3637 3638 3639 3640 3641 3642 3643 |
#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, |
26b15dad9
|
3644 |
.notify_policy = pfkey_send_policy_notify, |
08de61bea
|
3645 |
.migrate = pfkey_send_migrate, |
0f24558e9
|
3646 |
.is_alive = pfkey_is_alive, |
1da177e4c
|
3647 |
}; |
3fa87a321
|
3648 3649 |
static int __net_init pfkey_net_init(struct net *net) { |
23c049ca9
|
3650 |
struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
3fa87a321
|
3651 |
int rv; |
3fa87a321
|
3652 3653 |
INIT_HLIST_HEAD(&net_pfkey->table); atomic_set(&net_pfkey->socks_nr, 0); |
23c049ca9
|
3654 |
|
7013ec30e
|
3655 |
rv = pfkey_init_proc(net); |
3fa87a321
|
3656 |
|
3fa87a321
|
3657 3658 3659 3660 3661 3662 |
return rv; } static void __net_exit pfkey_net_exit(struct net *net) { struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); |
7013ec30e
|
3663 |
pfkey_exit_proc(net); |
3fa87a321
|
3664 |
BUG_ON(!hlist_empty(&net_pfkey->table)); |
3fa87a321
|
3665 3666 3667 3668 3669 |
} static struct pernet_operations pfkey_net_ops = { .init = pfkey_net_init, .exit = pfkey_net_exit, |
23c049ca9
|
3670 3671 |
.id = &pfkey_net_id, .size = sizeof(struct netns_pfkey), |
3fa87a321
|
3672 |
}; |
1da177e4c
|
3673 3674 3675 |
static void __exit ipsec_pfkey_exit(void) { xfrm_unregister_km(&pfkeyv2_mgr); |
1da177e4c
|
3676 |
sock_unregister(PF_KEY); |
180211b84
|
3677 |
unregister_pernet_subsys(&pfkey_net_ops); |
1da177e4c
|
3678 3679 3680 3681 3682 3683 3684 3685 3686 |
proto_unregister(&key_proto); } static int __init ipsec_pfkey_init(void) { int err = proto_register(&key_proto, 0); if (err != 0) goto out; |
180211b84
|
3687 |
err = register_pernet_subsys(&pfkey_net_ops); |
1da177e4c
|
3688 3689 |
if (err != 0) goto out_unregister_key_proto; |
180211b84
|
3690 3691 3692 |
err = sock_register(&pfkey_family_ops); if (err != 0) goto out_unregister_pernet; |
1da177e4c
|
3693 3694 |
err = xfrm_register_km(&pfkeyv2_mgr); if (err != 0) |
7013ec30e
|
3695 |
goto out_sock_unregister; |
1da177e4c
|
3696 3697 |
out: return err; |
180211b84
|
3698 |
|
1da177e4c
|
3699 |
out_sock_unregister: |
1da177e4c
|
3700 |
sock_unregister(PF_KEY); |
180211b84
|
3701 3702 |
out_unregister_pernet: unregister_pernet_subsys(&pfkey_net_ops); |
1da177e4c
|
3703 3704 3705 3706 3707 3708 3709 3710 3711 |
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); |