[IPSEC] Add complete xfrm event notification
Heres the final patch. What this patch provides - netlink xfrm events - ability to have events generated by netlink propagated to pfkey and vice versa. - fixes the acquire lets-be-happy-with-one-success issue Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Jamal Hadi Salim
committed by
David S. Miller
David S. Miller
parent
3aa3dfb372
commit
26b15dad9f
357
net/key/af_key.c
357
net/key/af_key.c
@ -1240,13 +1240,85 @@ static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *
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return 0;
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}
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static inline int event2poltype(int event)
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{
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switch (event) {
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case XFRM_SAP_DELETED:
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return SADB_X_SPDDELETE;
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case XFRM_SAP_ADDED:
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return SADB_X_SPDADD;
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case XFRM_SAP_UPDATED:
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return SADB_X_SPDUPDATE;
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case XFRM_SAP_EXPIRED:
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// return SADB_X_SPDEXPIRE;
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default:
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printk("pfkey: Unknown policy event %d\n", event);
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break;
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}
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return 0;
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}
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static inline int event2keytype(int event)
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{
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switch (event) {
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case XFRM_SAP_DELETED:
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return SADB_DELETE;
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case XFRM_SAP_ADDED:
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return SADB_ADD;
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case XFRM_SAP_UPDATED:
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return SADB_UPDATE;
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case XFRM_SAP_EXPIRED:
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return SADB_EXPIRE;
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default:
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printk("pfkey: Unknown SA event %d\n", event);
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break;
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}
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return 0;
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}
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/* ADD/UPD/DEL */
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static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
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{
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struct sk_buff *skb;
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struct sadb_msg *hdr;
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int hsc = 3;
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if (c->event == XFRM_SAP_DELETED)
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hsc = 0;
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if (c->event == XFRM_SAP_EXPIRED) {
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if (c->data)
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hsc = 2;
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else
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hsc = 1;
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}
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skb = pfkey_xfrm_state2msg(x, 0, hsc);
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if (IS_ERR(skb))
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return PTR_ERR(skb);
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hdr = (struct sadb_msg *) skb->data;
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hdr->sadb_msg_version = PF_KEY_V2;
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hdr->sadb_msg_type = event2keytype(c->event);
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hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
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hdr->sadb_msg_errno = 0;
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hdr->sadb_msg_reserved = 0;
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hdr->sadb_msg_seq = c->seq;
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hdr->sadb_msg_pid = c->pid;
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pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
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return 0;
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}
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static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
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{
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struct sk_buff *out_skb;
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struct sadb_msg *out_hdr;
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struct xfrm_state *x;
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int err;
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struct km_event c;
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xfrm_probe_algs();
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@ -1254,6 +1326,7 @@ static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr,
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if (IS_ERR(x))
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return PTR_ERR(x);
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xfrm_state_hold(x);
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if (hdr->sadb_msg_type == SADB_ADD)
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err = xfrm_state_add(x);
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else
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@ -1265,27 +1338,23 @@ static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr,
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return err;
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}
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out_skb = pfkey_xfrm_state2msg(x, 0, 3);
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if (IS_ERR(out_skb))
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return PTR_ERR(out_skb); /* XXX Should we return 0 here ? */
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if (hdr->sadb_msg_type == SADB_ADD)
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c.event = XFRM_SAP_ADDED;
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else
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c.event = XFRM_SAP_UPDATED;
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c.seq = hdr->sadb_msg_seq;
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c.pid = hdr->sadb_msg_pid;
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km_state_notify(x, &c);
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xfrm_state_put(x);
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out_hdr = (struct sadb_msg *) out_skb->data;
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out_hdr->sadb_msg_version = hdr->sadb_msg_version;
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out_hdr->sadb_msg_type = hdr->sadb_msg_type;
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out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
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out_hdr->sadb_msg_errno = 0;
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out_hdr->sadb_msg_reserved = 0;
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out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
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out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
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pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, sk);
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return 0;
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return err;
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}
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static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
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{
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struct xfrm_state *x;
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struct km_event c;
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int err;
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if (!ext_hdrs[SADB_EXT_SA-1] ||
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!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
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@ -1301,13 +1370,19 @@ static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
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return -EPERM;
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}
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xfrm_state_delete(x);
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err = xfrm_state_delete(x);
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if (err < 0) {
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xfrm_state_put(x);
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return err;
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}
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c.seq = hdr->sadb_msg_seq;
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c.pid = hdr->sadb_msg_pid;
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c.event = XFRM_SAP_DELETED;
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km_state_notify(x, &c);
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xfrm_state_put(x);
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pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
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BROADCAST_ALL, sk);
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return 0;
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return err;
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}
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static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
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@ -1445,28 +1520,42 @@ static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg
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return 0;
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}
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static int key_notify_sa_flush(struct km_event *c)
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{
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struct sk_buff *skb;
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struct sadb_msg *hdr;
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skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
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if (!skb)
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return -ENOBUFS;
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hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
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hdr->sadb_msg_satype = pfkey_proto2satype(c->data);
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hdr->sadb_msg_seq = c->seq;
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hdr->sadb_msg_pid = c->pid;
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hdr->sadb_msg_version = PF_KEY_V2;
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hdr->sadb_msg_errno = (uint8_t) 0;
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hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
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pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
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return 0;
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}
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static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
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{
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unsigned proto;
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struct sk_buff *skb_out;
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struct sadb_msg *hdr_out;
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struct km_event c;
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proto = pfkey_satype2proto(hdr->sadb_msg_satype);
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if (proto == 0)
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return -EINVAL;
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skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
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if (!skb_out)
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return -ENOBUFS;
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xfrm_state_flush(proto);
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hdr_out = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
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pfkey_hdr_dup(hdr_out, hdr);
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hdr_out->sadb_msg_errno = (uint8_t) 0;
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hdr_out->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
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pfkey_broadcast(skb_out, GFP_KERNEL, BROADCAST_ALL, NULL);
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c.data = proto;
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c.seq = hdr->sadb_msg_seq;
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c.pid = hdr->sadb_msg_pid;
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c.event = XFRM_SAP_FLUSHED;
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km_state_notify(NULL, &c);
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return 0;
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}
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@ -1859,6 +1948,35 @@ static void pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, i
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hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
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}
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static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
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{
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struct sk_buff *out_skb;
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struct sadb_msg *out_hdr;
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int err;
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out_skb = pfkey_xfrm_policy2msg_prep(xp);
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if (IS_ERR(out_skb)) {
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err = PTR_ERR(out_skb);
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goto out;
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}
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pfkey_xfrm_policy2msg(out_skb, xp, dir);
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out_hdr = (struct sadb_msg *) out_skb->data;
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out_hdr->sadb_msg_version = PF_KEY_V2;
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if (c->data && c->event == XFRM_SAP_DELETED)
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out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
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else
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out_hdr->sadb_msg_type = event2poltype(c->event);
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out_hdr->sadb_msg_errno = 0;
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out_hdr->sadb_msg_seq = c->seq;
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out_hdr->sadb_msg_pid = c->pid;
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pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
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out:
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return 0;
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}
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static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
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{
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int err;
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@ -1866,8 +1984,7 @@ static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
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struct sadb_address *sa;
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struct sadb_x_policy *pol;
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struct xfrm_policy *xp;
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struct sk_buff *out_skb;
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struct sadb_msg *out_hdr;
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struct km_event c;
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if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
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ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
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@ -1935,31 +2052,23 @@ static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
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(err = parse_ipsecrequests(xp, pol)) < 0)
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goto out;
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out_skb = pfkey_xfrm_policy2msg_prep(xp);
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if (IS_ERR(out_skb)) {
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err = PTR_ERR(out_skb);
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goto out;
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}
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err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
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hdr->sadb_msg_type != SADB_X_SPDUPDATE);
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if (err) {
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kfree_skb(out_skb);
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goto out;
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kfree(xp);
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return err;
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}
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pfkey_xfrm_policy2msg(out_skb, xp, pol->sadb_x_policy_dir-1);
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if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
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c.event = XFRM_SAP_UPDATED;
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else
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c.event = XFRM_SAP_ADDED;
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c.seq = hdr->sadb_msg_seq;
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c.pid = hdr->sadb_msg_pid;
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km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
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xfrm_pol_put(xp);
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out_hdr = (struct sadb_msg *) out_skb->data;
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out_hdr->sadb_msg_version = hdr->sadb_msg_version;
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out_hdr->sadb_msg_type = hdr->sadb_msg_type;
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out_hdr->sadb_msg_satype = 0;
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out_hdr->sadb_msg_errno = 0;
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out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
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out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
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pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, sk);
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return 0;
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out:
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@ -1973,9 +2082,8 @@ static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg
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struct sadb_address *sa;
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struct sadb_x_policy *pol;
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struct xfrm_policy *xp;
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struct sk_buff *out_skb;
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struct sadb_msg *out_hdr;
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struct xfrm_selector sel;
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struct km_event c;
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if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
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ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
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@ -2010,25 +2118,40 @@ static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg
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err = 0;
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c.seq = hdr->sadb_msg_seq;
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c.pid = hdr->sadb_msg_pid;
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c.event = XFRM_SAP_DELETED;
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km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
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xfrm_pol_put(xp);
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return err;
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}
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static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
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{
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int err;
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struct sk_buff *out_skb;
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struct sadb_msg *out_hdr;
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err = 0;
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out_skb = pfkey_xfrm_policy2msg_prep(xp);
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if (IS_ERR(out_skb)) {
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err = PTR_ERR(out_skb);
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goto out;
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}
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pfkey_xfrm_policy2msg(out_skb, xp, pol->sadb_x_policy_dir-1);
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pfkey_xfrm_policy2msg(out_skb, xp, dir);
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out_hdr = (struct sadb_msg *) out_skb->data;
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out_hdr->sadb_msg_version = hdr->sadb_msg_version;
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out_hdr->sadb_msg_type = SADB_X_SPDDELETE;
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out_hdr->sadb_msg_type = hdr->sadb_msg_type;
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out_hdr->sadb_msg_satype = 0;
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out_hdr->sadb_msg_errno = 0;
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out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
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out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
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pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, sk);
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pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
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err = 0;
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out:
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xfrm_pol_put(xp);
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return err;
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}
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@ -2037,8 +2160,7 @@ static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
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int err;
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struct sadb_x_policy *pol;
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struct xfrm_policy *xp;
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struct sk_buff *out_skb;
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struct sadb_msg *out_hdr;
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struct km_event c;
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if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
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return -EINVAL;
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@ -2050,24 +2172,16 @@ static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
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err = 0;
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out_skb = pfkey_xfrm_policy2msg_prep(xp);
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if (IS_ERR(out_skb)) {
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err = PTR_ERR(out_skb);
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goto out;
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c.seq = hdr->sadb_msg_seq;
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c.pid = hdr->sadb_msg_pid;
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if (hdr->sadb_msg_type == SADB_X_SPDDELETE2) {
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c.data = 1; // to signal pfkey of SADB_X_SPDDELETE2
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c.event = XFRM_SAP_DELETED;
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km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
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} else {
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err = key_pol_get_resp(sk, xp, hdr, pol->sadb_x_policy_dir-1);
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}
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pfkey_xfrm_policy2msg(out_skb, xp, pol->sadb_x_policy_dir-1);
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out_hdr = (struct sadb_msg *) out_skb->data;
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out_hdr->sadb_msg_version = hdr->sadb_msg_version;
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out_hdr->sadb_msg_type = hdr->sadb_msg_type;
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out_hdr->sadb_msg_satype = 0;
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out_hdr->sadb_msg_errno = 0;
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out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
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out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
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pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, sk);
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err = 0;
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out:
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xfrm_pol_put(xp);
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return err;
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}
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@ -2102,22 +2216,34 @@ static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *
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return xfrm_policy_walk(dump_sp, &data);
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}
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static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
|
||||
static int key_notify_policy_flush(struct km_event *c)
|
||||
{
|
||||
struct sk_buff *skb_out;
|
||||
struct sadb_msg *hdr_out;
|
||||
struct sadb_msg *hdr;
|
||||
|
||||
skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
|
||||
skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
|
||||
if (!skb_out)
|
||||
return -ENOBUFS;
|
||||
hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
|
||||
hdr->sadb_msg_seq = c->seq;
|
||||
hdr->sadb_msg_pid = c->pid;
|
||||
hdr->sadb_msg_version = PF_KEY_V2;
|
||||
hdr->sadb_msg_errno = (uint8_t) 0;
|
||||
hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
|
||||
pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
|
||||
return 0;
|
||||
|
||||
}
|
||||
|
||||
static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
|
||||
{
|
||||
struct km_event c;
|
||||
|
||||
xfrm_policy_flush();
|
||||
|
||||
hdr_out = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
|
||||
pfkey_hdr_dup(hdr_out, hdr);
|
||||
hdr_out->sadb_msg_errno = (uint8_t) 0;
|
||||
hdr_out->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
|
||||
pfkey_broadcast(skb_out, GFP_KERNEL, BROADCAST_ALL, NULL);
|
||||
c.event = XFRM_SAP_FLUSHED;
|
||||
c.pid = hdr->sadb_msg_pid;
|
||||
c.seq = hdr->sadb_msg_seq;
|
||||
km_policy_notify(NULL, 0, &c);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -2317,11 +2443,23 @@ static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
|
||||
}
|
||||
}
|
||||
|
||||
static int pfkey_send_notify(struct xfrm_state *x, int hard)
|
||||
static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
|
||||
{
|
||||
struct sk_buff *out_skb;
|
||||
struct sadb_msg *out_hdr;
|
||||
int hsc = (hard ? 2 : 1);
|
||||
int hard;
|
||||
int hsc;
|
||||
|
||||
hard = c->data;
|
||||
if (hard)
|
||||
hsc = 2;
|
||||
else
|
||||
hsc = 1;
|
||||
|
||||
out_skb = pfkey_xfrm_state2msg(x, 0, hsc);
|
||||
if (IS_ERR(out_skb))
|
||||
@ -2340,6 +2478,44 @@ static int pfkey_send_notify(struct xfrm_state *x, int hard)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
|
||||
{
|
||||
switch (c->event) {
|
||||
case XFRM_SAP_EXPIRED:
|
||||
return key_notify_sa_expire(x, c);
|
||||
case XFRM_SAP_DELETED:
|
||||
case XFRM_SAP_ADDED:
|
||||
case XFRM_SAP_UPDATED:
|
||||
return key_notify_sa(x, c);
|
||||
case XFRM_SAP_FLUSHED:
|
||||
return key_notify_sa_flush(c);
|
||||
default:
|
||||
printk("pfkey: Unknown SA event %d\n", c->event);
|
||||
break;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
|
||||
{
|
||||
switch (c->event) {
|
||||
case XFRM_SAP_EXPIRED:
|
||||
return key_notify_policy_expire(xp, c);
|
||||
case XFRM_SAP_DELETED:
|
||||
case XFRM_SAP_ADDED:
|
||||
case XFRM_SAP_UPDATED:
|
||||
return key_notify_policy(xp, dir, c);
|
||||
case XFRM_SAP_FLUSHED:
|
||||
return key_notify_policy_flush(c);
|
||||
default:
|
||||
printk("pfkey: Unknown policy event %d\n", c->event);
|
||||
break;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static u32 get_acqseq(void)
|
||||
{
|
||||
u32 res;
|
||||
@ -2856,6 +3032,7 @@ static struct xfrm_mgr pfkeyv2_mgr =
|
||||
.acquire = pfkey_send_acquire,
|
||||
.compile_policy = pfkey_compile_policy,
|
||||
.new_mapping = pfkey_send_new_mapping,
|
||||
.notify_policy = pfkey_send_policy_notify,
|
||||
};
|
||||
|
||||
static void __exit ipsec_pfkey_exit(void)
|
||||
|
||||
Reference in New Issue
Block a user