From 4ab47d47af20addd6ecee1ece0205b1fbf483942 Mon Sep 17 00:00:00 2001 From: Antony Antony Date: Tue, 6 Jun 2017 12:12:13 +0200 Subject: xfrm: extend MIGRATE with UDP encapsulation port Add UDP encapsulation port to XFRM_MSG_MIGRATE using an optional netlink attribute XFRMA_ENCAP. The devices that support IKE MOBIKE extension (RFC-4555 Section 3.8) could go to sleep for a few minutes and wake up. When it wake up the NAT mapping could have expired, the device send a MOBIKE UPDATE_SA message to migrate the IPsec SA. The change could be a change UDP encapsulation port, IP address, or both. Reported-by: Paul Wouters Signed-off-by: Antony Antony Reviewed-by: Richard Guy Briggs Signed-off-by: Steffen Klassert --- net/key/af_key.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/key') diff --git a/net/key/af_key.c b/net/key/af_key.c index c1950bb14735..3b130cbdc463 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -2602,7 +2602,7 @@ static int pfkey_migrate(struct sock *sk, struct sk_buff *skb, } return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i, - kma ? &k : NULL, net); + kma ? &k : NULL, net, NULL); out: return err; -- cgit v1.2.3 From 8bafd73093f2f431f5a363f8057abc0ccc118853 Mon Sep 17 00:00:00 2001 From: Antony Antony Date: Tue, 6 Jun 2017 12:12:14 +0200 Subject: xfrm: add UDP encapsulation port in migrate message Add XFRMA_ENCAP, UDP encapsulation port, to km_migrate announcement to userland. Only add if XFRMA_ENCAP was in user migrate request. Signed-off-by: Antony Antony Reviewed-by: Richard Guy Briggs Signed-off-by: Steffen Klassert --- include/net/xfrm.h | 6 ++++-- net/key/af_key.c | 6 ++++-- net/xfrm/xfrm_policy.c | 2 +- net/xfrm/xfrm_state.c | 6 ++++-- net/xfrm/xfrm_user.c | 23 +++++++++++++++++------ 5 files changed, 30 insertions(+), 13 deletions(-) (limited to 'net/key') diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 1cc71726e581..34420d9708a0 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -631,7 +631,8 @@ struct xfrm_mgr { u8 dir, u8 type, const struct xfrm_migrate *m, int num_bundles, - const struct xfrm_kmaddress *k); + const struct xfrm_kmaddress *k, + const struct xfrm_encap_tmpl *encap); bool (*is_alive)(const struct km_event *c); }; @@ -1685,7 +1686,8 @@ int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); #ifdef CONFIG_XFRM_MIGRATE int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, const struct xfrm_migrate *m, int num_bundles, - const struct xfrm_kmaddress *k); + const struct xfrm_kmaddress *k, + const struct xfrm_encap_tmpl *encap); struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net); struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, struct xfrm_migrate *m, diff --git a/net/key/af_key.c b/net/key/af_key.c index 3b130cbdc463..d539bb7df01d 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -3508,7 +3508,8 @@ static int set_ipsecrequest(struct sk_buff *skb, #ifdef CONFIG_NET_KEY_MIGRATE static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, const struct xfrm_migrate *m, int num_bundles, - const struct xfrm_kmaddress *k) + const struct xfrm_kmaddress *k, + const struct xfrm_encap_tmpl *encap) { int i; int sasize_sel; @@ -3618,7 +3619,8 @@ err: #else static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, const struct xfrm_migrate *m, int num_bundles, - const struct xfrm_kmaddress *k) + const struct xfrm_kmaddress *k, + const struct xfrm_encap_tmpl *encap) { return -ENOPROTOOPT; } diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index d47f055ca90e..e6141891d23c 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -3384,7 +3384,7 @@ int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, } /* Stage 5 - announce */ - km_migrate(sel, dir, type, m, num_migrate, k); + km_migrate(sel, dir, type, m, num_migrate, k, encap); xfrm_pol_put(pol); diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index b76e6730b165..f2421c668449 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -1964,7 +1964,8 @@ EXPORT_SYMBOL(km_policy_expired); #ifdef CONFIG_XFRM_MIGRATE int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, const struct xfrm_migrate *m, int num_migrate, - const struct xfrm_kmaddress *k) + const struct xfrm_kmaddress *k, + const struct xfrm_encap_tmpl *encap) { int err = -EINVAL; int ret; @@ -1973,7 +1974,8 @@ int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, rcu_read_lock(); list_for_each_entry_rcu(km, &xfrm_km_list, list) { if (km->migrate) { - ret = km->migrate(sel, dir, type, m, num_migrate, k); + ret = km->migrate(sel, dir, type, m, num_migrate, k, + encap); if (!ret) err = ret; } diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index fb98892f7d89..6197c7231bc7 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -2314,17 +2314,20 @@ static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); } -static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma) +static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma, + int with_encp) { return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) + + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0) + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) + userpolicy_type_attrsize(); } static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, int num_migrate, const struct xfrm_kmaddress *k, - const struct xfrm_selector *sel, u8 dir, u8 type) + const struct xfrm_selector *sel, + const struct xfrm_encap_tmpl *encap, u8 dir, u8 type) { const struct xfrm_migrate *mp; struct xfrm_userpolicy_id *pol_id; @@ -2346,6 +2349,11 @@ static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, if (err) goto out_cancel; } + if (encap) { + err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap); + if (err) + goto out_cancel; + } err = copy_to_user_policy_type(type, skb); if (err) goto out_cancel; @@ -2365,17 +2373,19 @@ out_cancel: static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, const struct xfrm_migrate *m, int num_migrate, - const struct xfrm_kmaddress *k) + const struct xfrm_kmaddress *k, + const struct xfrm_encap_tmpl *encap) { struct net *net = &init_net; struct sk_buff *skb; - skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); + skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap), + GFP_ATOMIC); if (skb == NULL) return -ENOMEM; /* build migrate */ - if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) + if (build_migrate(skb, m, num_migrate, k, sel, encap, dir, type) < 0) BUG(); return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE); @@ -2383,7 +2393,8 @@ static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, #else static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, const struct xfrm_migrate *m, int num_migrate, - const struct xfrm_kmaddress *k) + const struct xfrm_kmaddress *k, + const struct xfrm_encap_tmpl *encap) { return -ENOPROTOOPT; } -- cgit v1.2.3