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-rw-r--r--include/net/xfrm.h10
-rw-r--r--include/uapi/linux/pfkeyv2.h15
-rw-r--r--include/uapi/linux/xfrm.h10
-rw-r--r--net/key/af_key.c19
-rw-r--r--net/xfrm/xfrm_state.c25
-rw-r--r--net/xfrm/xfrm_user.c28
6 files changed, 98 insertions, 9 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 5313ccfdeedf..45332acac022 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -118,11 +118,10 @@
struct xfrm_state_walk {
struct list_head all;
u8 state;
- union {
- u8 dying;
- u8 proto;
- };
+ u8 dying;
+ u8 proto;
u32 seq;
+ struct xfrm_filter *filter;
};
/* Full description of state of transformer. */
@@ -1406,7 +1405,8 @@ static inline void xfrm_sysctl_fini(struct net *net)
}
#endif
-void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto);
+void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
+ struct xfrm_filter *filter);
int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
int (*func)(struct xfrm_state *, int, void*), void *);
void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
diff --git a/include/uapi/linux/pfkeyv2.h b/include/uapi/linux/pfkeyv2.h
index 0b80c806631f..ada7f0171ccc 100644
--- a/include/uapi/linux/pfkeyv2.h
+++ b/include/uapi/linux/pfkeyv2.h
@@ -235,6 +235,18 @@ struct sadb_x_kmaddress {
} __attribute__((packed));
/* sizeof(struct sadb_x_kmaddress) == 8 */
+/* To specify the SA dump filter */
+struct sadb_x_filter {
+ __u16 sadb_x_filter_len;
+ __u16 sadb_x_filter_exttype;
+ __u32 sadb_x_filter_saddr[4];
+ __u32 sadb_x_filter_daddr[4];
+ __u16 sadb_x_filter_family;
+ __u8 sadb_x_filter_splen;
+ __u8 sadb_x_filter_dplen;
+} __attribute__((packed));
+/* sizeof(struct sadb_x_filter) == 40 */
+
/* Message types */
#define SADB_RESERVED 0
#define SADB_GETSPI 1
@@ -358,7 +370,8 @@ struct sadb_x_kmaddress {
#define SADB_X_EXT_SEC_CTX 24
/* Used with MIGRATE to pass @ to IKE for negotiation */
#define SADB_X_EXT_KMADDRESS 25
-#define SADB_EXT_MAX 25
+#define SADB_X_EXT_FILTER 26
+#define SADB_EXT_MAX 26
/* Identity Extension values */
#define SADB_IDENTTYPE_RESERVED 0
diff --git a/include/uapi/linux/xfrm.h b/include/uapi/linux/xfrm.h
index a8cd6a4a2970..6550c679584f 100644
--- a/include/uapi/linux/xfrm.h
+++ b/include/uapi/linux/xfrm.h
@@ -298,6 +298,8 @@ enum xfrm_attr_type_t {
XFRMA_TFCPAD, /* __u32 */
XFRMA_REPLAY_ESN_VAL, /* struct xfrm_replay_esn */
XFRMA_SA_EXTRA_FLAGS, /* __u32 */
+ XFRMA_PROTO, /* __u8 */
+ XFRMA_FILTER, /* struct xfrm_filter */
__XFRMA_MAX
#define XFRMA_MAX (__XFRMA_MAX - 1)
@@ -474,6 +476,14 @@ struct xfrm_user_mapping {
__be16 new_sport;
};
+struct xfrm_filter {
+ xfrm_address_t saddr;
+ xfrm_address_t daddr;
+ __u16 family;
+ __u8 splen;
+ __u8 dplen;
+};
+
#ifndef __KERNEL__
/* backwards compatibility for userspace */
#define XFRMGRP_ACQUIRE 1
diff --git a/net/key/af_key.c b/net/key/af_key.c
index e1c69d024197..f0879c19f452 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -1798,6 +1798,7 @@ static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
{
u8 proto;
+ struct xfrm_filter *filter = NULL;
struct pfkey_sock *pfk = pfkey_sk(sk);
if (pfk->dump.dump != NULL)
@@ -1807,11 +1808,27 @@ static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_ms
if (proto == 0)
return -EINVAL;
+ if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
+ struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
+
+ filter = kmalloc(sizeof(*filter), GFP_KERNEL);
+ if (filter == NULL)
+ return -ENOMEM;
+
+ memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
+ sizeof(xfrm_address_t));
+ memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
+ sizeof(xfrm_address_t));
+ filter->family = xfilter->sadb_x_filter_family;
+ filter->splen = xfilter->sadb_x_filter_splen;
+ filter->dplen = xfilter->sadb_x_filter_dplen;
+ }
+
pfk->dump.msg_version = hdr->sadb_msg_version;
pfk->dump.msg_portid = hdr->sadb_msg_pid;
pfk->dump.dump = pfkey_dump_sa;
pfk->dump.done = pfkey_dump_sa_done;
- xfrm_state_walk_init(&pfk->dump.u.state, proto);
+ xfrm_state_walk_init(&pfk->dump.u.state, proto, filter);
return pfkey_do_dump(pfk);
}
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 0bf12f665b9b..a750901ac3db 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -1603,6 +1603,23 @@ unlock:
}
EXPORT_SYMBOL(xfrm_alloc_spi);
+static bool __xfrm_state_filter_match(struct xfrm_state *x,
+ struct xfrm_filter *filter)
+{
+ if (filter) {
+ if ((filter->family == AF_INET ||
+ filter->family == AF_INET6) &&
+ x->props.family != filter->family)
+ return false;
+
+ return addr_match(&x->props.saddr, &filter->saddr,
+ filter->splen) &&
+ addr_match(&x->id.daddr, &filter->daddr,
+ filter->dplen);
+ }
+ return true;
+}
+
int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
int (*func)(struct xfrm_state *, int, void*),
void *data)
@@ -1625,6 +1642,8 @@ int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
state = container_of(x, struct xfrm_state, km);
if (!xfrm_id_proto_match(state->id.proto, walk->proto))
continue;
+ if (!__xfrm_state_filter_match(state, walk->filter))
+ continue;
err = func(state, walk->seq, data);
if (err) {
list_move_tail(&walk->all, &x->all);
@@ -1643,17 +1662,21 @@ out:
}
EXPORT_SYMBOL(xfrm_state_walk);
-void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto)
+void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
+ struct xfrm_filter *filter)
{
INIT_LIST_HEAD(&walk->all);
walk->proto = proto;
walk->state = XFRM_STATE_DEAD;
walk->seq = 0;
+ walk->filter = filter;
}
EXPORT_SYMBOL(xfrm_state_walk_init);
void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net)
{
+ kfree(walk->filter);
+
if (list_empty(&walk->all))
return;
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index d7694f258294..023e5e7ea4c6 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -887,6 +887,7 @@ static int xfrm_dump_sa_done(struct netlink_callback *cb)
return 0;
}
+static const struct nla_policy xfrma_policy[XFRMA_MAX+1];
static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
{
struct net *net = sock_net(skb->sk);
@@ -902,8 +903,31 @@ static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
info.nlmsg_flags = NLM_F_MULTI;
if (!cb->args[0]) {
+ struct nlattr *attrs[XFRMA_MAX+1];
+ struct xfrm_filter *filter = NULL;
+ u8 proto = 0;
+ int err;
+
cb->args[0] = 1;
- xfrm_state_walk_init(walk, 0);
+
+ err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX,
+ xfrma_policy);
+ if (err < 0)
+ return err;
+
+ if (attrs[XFRMA_FILTER]) {
+ filter = kmalloc(sizeof(*filter), GFP_KERNEL);
+ if (filter == NULL)
+ return -ENOMEM;
+
+ memcpy(filter, nla_data(attrs[XFRMA_FILTER]),
+ sizeof(*filter));
+ }
+
+ if (attrs[XFRMA_PROTO])
+ proto = nla_get_u8(attrs[XFRMA_PROTO]);
+
+ xfrm_state_walk_init(walk, proto, filter);
}
(void) xfrm_state_walk(net, walk, dump_one_state, &info);
@@ -2309,6 +2333,8 @@ static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
[XFRMA_TFCPAD] = { .type = NLA_U32 },
[XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
[XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
+ [XFRMA_PROTO] = { .type = NLA_U8 },
+ [XFRMA_FILTER] = { .len = sizeof(struct xfrm_filter) },
};
static const struct xfrm_link {
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 06:06:04 +0100