From 02bfd8ecf5cf980ede53e30a903b102924fc32f4 Mon Sep 17 00:00:00 2001 From: Steffen Klassert Date: Tue, 27 Nov 2012 09:46:17 +0100 Subject: xfrm: Remove unused defines XFRM_REPLAY_SEQ, XFRM_REPLAY_OSEQ and XFRM_REPLAY_SEQ_MASK were introduced years ago but actually never used. Signed-off-by: Steffen Klassert --- include/net/xfrm.h | 4 ---- 1 file changed, 4 deletions(-) (limited to 'include/net/xfrm.h') diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 63445ede48b..421f764794d 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -557,10 +557,6 @@ struct xfrm_migrate { }; #define XFRM_KM_TIMEOUT 30 -/* which seqno */ -#define XFRM_REPLAY_SEQ 1 -#define XFRM_REPLAY_OSEQ 2 -#define XFRM_REPLAY_SEQ_MASK 3 /* what happened */ #define XFRM_REPLAY_UPDATE XFRM_AE_CR #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE -- cgit v1.2.3-70-g09d2 From ff88b30c717f21dffba6784cae4d3287da16f6ef Mon Sep 17 00:00:00 2001 From: YOSHIFUJI Hideaki / 吉藤英明 Date: Tue, 29 Jan 2013 12:48:31 +0000 Subject: xfrm: Use ipv6_addr_equal() where appropriate. Signed-off-by: YOSHIFUJI Hideaki Signed-off-by: David S. Miller --- include/net/xfrm.h | 13 ++++++++++--- net/ipv6/xfrm6_tunnel.c | 4 ++-- 2 files changed, 12 insertions(+), 5 deletions(-) (limited to 'include/net/xfrm.h') diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 421f764794d..0d8a797f044 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -1032,7 +1032,7 @@ static inline int __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) { return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && - ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); + !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); } static inline int @@ -1243,8 +1243,8 @@ static __inline__ int __xfrm6_state_addr_check(const struct xfrm_state *x, const xfrm_address_t *daddr, const xfrm_address_t *saddr) { - if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && - (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| + if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && + (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || ipv6_addr_any((struct in6_addr *)saddr) || ipv6_addr_any((struct in6_addr *)&x->props.saddr))) return 1; @@ -1588,6 +1588,13 @@ static inline int xfrm_addr_cmp(const xfrm_address_t *a, } } +static inline bool xfrm6_addr_equal(const xfrm_address_t *a, + const xfrm_address_t *b) +{ + return ipv6_addr_equal((const struct in6_addr *)a, + (const struct in6_addr *)b); +} + static inline int xfrm_policy_id2dir(u32 index) { return index & 7; diff --git a/net/ipv6/xfrm6_tunnel.c b/net/ipv6/xfrm6_tunnel.c index babd1674388..6cc48012b73 100644 --- a/net/ipv6/xfrm6_tunnel.c +++ b/net/ipv6/xfrm6_tunnel.c @@ -94,7 +94,7 @@ static struct xfrm6_tunnel_spi *__xfrm6_tunnel_spi_lookup(struct net *net, const hlist_for_each_entry_rcu(x6spi, pos, &xfrm6_tn->spi_byaddr[xfrm6_tunnel_spi_hash_byaddr(saddr)], list_byaddr) { - if (memcmp(&x6spi->addr, saddr, sizeof(x6spi->addr)) == 0) + if (xfrm6_addr_equal(&x6spi->addr, saddr)) return x6spi; } @@ -211,7 +211,7 @@ static void xfrm6_tunnel_free_spi(struct net *net, xfrm_address_t *saddr) &xfrm6_tn->spi_byaddr[xfrm6_tunnel_spi_hash_byaddr(saddr)], list_byaddr) { - if (memcmp(&x6spi->addr, saddr, sizeof(x6spi->addr)) == 0) { + if (xfrm6_addr_equal(&x6spi->addr, saddr)) { if (atomic_dec_and_test(&x6spi->refcnt)) { hlist_del_rcu(&x6spi->list_byaddr); hlist_del_rcu(&x6spi->list_byspi); -- cgit v1.2.3-70-g09d2 From 70e94e66aec255aff276397f5ed3f3626c548f1c Mon Sep 17 00:00:00 2001 From: YOSHIFUJI Hideaki / 吉藤英明 Date: Tue, 29 Jan 2013 12:48:50 +0000 Subject: xfrm: Convert xfrm_addr_cmp() to boolean xfrm_addr_equal(). All users of xfrm_addr_cmp() use its result as boolean. Introduce xfrm_addr_equal() (which is equal to !xfrm_addr_cmp()) and convert all users. Signed-off-by: YOSHIFUJI Hideaki Signed-off-by: David S. Miller --- include/net/xfrm.h | 25 ++++++++++++------------- net/key/af_key.c | 8 ++++---- net/xfrm/xfrm_policy.c | 24 ++++++++++++------------ net/xfrm/xfrm_state.c | 34 +++++++++++++++++----------------- net/xfrm/xfrm_user.c | 2 +- 5 files changed, 46 insertions(+), 47 deletions(-) (limited to 'include/net/xfrm.h') diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 0d8a797f044..de34883e8b1 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -1574,27 +1574,26 @@ extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, int probe); -static inline int xfrm_addr_cmp(const xfrm_address_t *a, - const xfrm_address_t *b, - int family) +static inline bool xfrm6_addr_equal(const xfrm_address_t *a, + const xfrm_address_t *b) +{ + return ipv6_addr_equal((const struct in6_addr *)a, + (const struct in6_addr *)b); +} + +static inline bool xfrm_addr_equal(const xfrm_address_t *a, + const xfrm_address_t *b, + sa_family_t family) { switch (family) { default: case AF_INET: - return (__force u32)a->a4 - (__force u32)b->a4; + return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; case AF_INET6: - return ipv6_addr_cmp((const struct in6_addr *)a, - (const struct in6_addr *)b); + return xfrm6_addr_equal(a, b); } } -static inline bool xfrm6_addr_equal(const xfrm_address_t *a, - const xfrm_address_t *b) -{ - return ipv6_addr_equal((const struct in6_addr *)a, - (const struct in6_addr *)b); -} - static inline int xfrm_policy_id2dir(u32 index) { return index & 7; diff --git a/net/key/af_key.c b/net/key/af_key.c index 5b426a64654..cc2630ac806 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -762,7 +762,7 @@ static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x, } /* identity & sensitivity */ - if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, x->props.family)) + if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, x->props.family)) size += sizeof(struct sadb_address) + sockaddr_size; if (add_keys) { @@ -909,8 +909,8 @@ static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x, if (!addr->sadb_address_prefixlen) BUG(); - if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, - x->props.family)) { + if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr, + x->props.family)) { addr = (struct sadb_address*) skb_put(skb, sizeof(struct sadb_address)+sockaddr_size); addr->sadb_address_len = @@ -1321,7 +1321,7 @@ static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, const struct sadb_ if (hdr->sadb_msg_seq) { x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq); - if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) { + if (x && !xfrm_addr_equal(&x->id.daddr, xdaddr, family)) { xfrm_state_put(x); x = NULL; } diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index 07c585756d2..6c9aa642a2b 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -2786,10 +2786,10 @@ static bool xfrm_migrate_selector_match(const struct xfrm_selector *sel_cmp, { if (sel_cmp->proto == IPSEC_ULPROTO_ANY) { if (sel_tgt->family == sel_cmp->family && - xfrm_addr_cmp(&sel_tgt->daddr, &sel_cmp->daddr, - sel_cmp->family) == 0 && - xfrm_addr_cmp(&sel_tgt->saddr, &sel_cmp->saddr, - sel_cmp->family) == 0 && + xfrm_addr_equal(&sel_tgt->daddr, &sel_cmp->daddr, + sel_cmp->family) && + xfrm_addr_equal(&sel_tgt->saddr, &sel_cmp->saddr, + sel_cmp->family) && sel_tgt->prefixlen_d == sel_cmp->prefixlen_d && sel_tgt->prefixlen_s == sel_cmp->prefixlen_s) { return true; @@ -2847,10 +2847,10 @@ static int migrate_tmpl_match(const struct xfrm_migrate *m, const struct xfrm_tm switch (t->mode) { case XFRM_MODE_TUNNEL: case XFRM_MODE_BEET: - if (xfrm_addr_cmp(&t->id.daddr, &m->old_daddr, - m->old_family) == 0 && - xfrm_addr_cmp(&t->saddr, &m->old_saddr, - m->old_family) == 0) { + if (xfrm_addr_equal(&t->id.daddr, &m->old_daddr, + m->old_family) && + xfrm_addr_equal(&t->saddr, &m->old_saddr, + m->old_family)) { match = 1; } break; @@ -2916,10 +2916,10 @@ static int xfrm_migrate_check(const struct xfrm_migrate *m, int num_migrate) return -EINVAL; for (i = 0; i < num_migrate; i++) { - if ((xfrm_addr_cmp(&m[i].old_daddr, &m[i].new_daddr, - m[i].old_family) == 0) && - (xfrm_addr_cmp(&m[i].old_saddr, &m[i].new_saddr, - m[i].old_family) == 0)) + if (xfrm_addr_equal(&m[i].old_daddr, &m[i].new_daddr, + m[i].old_family) && + xfrm_addr_equal(&m[i].old_saddr, &m[i].new_saddr, + m[i].old_family)) return -EINVAL; if (xfrm_addr_any(&m[i].new_daddr, m[i].new_family) || xfrm_addr_any(&m[i].new_saddr, m[i].new_family)) diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index 0adae918a7a..ae01bdbcb29 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -691,7 +691,7 @@ static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, if (x->props.family != family || x->id.spi != spi || x->id.proto != proto || - xfrm_addr_cmp(&x->id.daddr, daddr, family)) + !xfrm_addr_equal(&x->id.daddr, daddr, family)) continue; if ((mark & x->mark.m) != x->mark.v) @@ -715,8 +715,8 @@ static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark, hlist_for_each_entry(x, entry, net->xfrm.state_bysrc+h, bysrc) { if (x->props.family != family || x->id.proto != proto || - xfrm_addr_cmp(&x->id.daddr, daddr, family) || - xfrm_addr_cmp(&x->props.saddr, saddr, family)) + !xfrm_addr_equal(&x->id.daddr, daddr, family) || + !xfrm_addr_equal(&x->props.saddr, saddr, family)) continue; if ((mark & x->mark.m) != x->mark.v) @@ -981,8 +981,8 @@ static void __xfrm_state_bump_genids(struct xfrm_state *xnew) if (x->props.family == family && x->props.reqid == reqid && (mark & x->mark.m) == x->mark.v && - !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) && - !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family)) + xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) && + xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family)) x->genid++; } } @@ -1016,8 +1016,8 @@ static struct xfrm_state *__find_acq_core(struct net *net, struct xfrm_mark *m, x->id.spi != 0 || x->id.proto != proto || (mark & x->mark.m) != x->mark.v || - xfrm_addr_cmp(&x->id.daddr, daddr, family) || - xfrm_addr_cmp(&x->props.saddr, saddr, family)) + !xfrm_addr_equal(&x->id.daddr, daddr, family) || + !xfrm_addr_equal(&x->props.saddr, saddr, family)) continue; xfrm_state_hold(x); @@ -1100,7 +1100,7 @@ int xfrm_state_add(struct xfrm_state *x) if (use_spi && x->km.seq) { x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq); if (x1 && ((x1->id.proto != x->id.proto) || - xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) { + !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) { to_put = x1; x1 = NULL; } @@ -1226,10 +1226,10 @@ struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m) continue; if (m->reqid && x->props.reqid != m->reqid) continue; - if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr, - m->old_family) || - xfrm_addr_cmp(&x->props.saddr, &m->old_saddr, - m->old_family)) + if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, + m->old_family) || + !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, + m->old_family)) continue; xfrm_state_hold(x); return x; @@ -1241,10 +1241,10 @@ struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m) if (x->props.mode != m->mode || x->id.proto != m->proto) continue; - if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr, - m->old_family) || - xfrm_addr_cmp(&x->props.saddr, &m->old_saddr, - m->old_family)) + if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, + m->old_family) || + !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, + m->old_family)) continue; xfrm_state_hold(x); return x; @@ -1269,7 +1269,7 @@ struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); /* add state */ - if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) { + if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) { /* a care is needed when the destination address of the state is to be updated as it is a part of triplet */ xfrm_state_insert(xc); diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index eb872b2e366..fbd9e6cd0fd 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -1112,7 +1112,7 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, mark = xfrm_mark_get(attrs, &m); if (p->info.seq) { x = xfrm_find_acq_byseq(net, mark, p->info.seq); - if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { + if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) { xfrm_state_put(x); x = NULL; } -- cgit v1.2.3-70-g09d2 From 7e50f84c94b82c3b2d23ac8878012b3b60ea0e96 Mon Sep 17 00:00:00 2001 From: Jussi Kivilinna Date: Thu, 31 Jan 2013 12:40:38 +0200 Subject: pf_key/xfrm_algo: prepare pf_key and xfrm_algo for new algorithms without pfkey support Mark existing algorithms as pfkey supported and make pfkey only use algorithms that have pfkey_supported set. Signed-off-by: Jussi Kivilinna Signed-off-by: Steffen Klassert --- include/net/xfrm.h | 5 ++-- net/key/af_key.c | 39 ++++++++++++++++++++++++------- net/xfrm/xfrm_algo.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++----- 3 files changed, 93 insertions(+), 16 deletions(-) (limited to 'include/net/xfrm.h') diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 421f764794d..814a1baa175 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -1320,6 +1320,7 @@ struct xfrm_algo_desc { char *name; char *compat; u8 available:1; + u8 pfkey_supported:1; union { struct xfrm_algo_aead_info aead; struct xfrm_algo_auth_info auth; @@ -1561,8 +1562,8 @@ extern void xfrm_input_init(void); extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); extern void xfrm_probe_algs(void); -extern int xfrm_count_auth_supported(void); -extern int xfrm_count_enc_supported(void); +extern int xfrm_count_pfkey_auth_supported(void); +extern int xfrm_count_pfkey_enc_supported(void); extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); diff --git a/net/key/af_key.c b/net/key/af_key.c index 6a6e68479b9..cb75f9b3105 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -815,18 +815,21 @@ static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x, sa->sadb_sa_auth = 0; if (x->aalg) { struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0); - sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0; + sa->sadb_sa_auth = (a && a->pfkey_supported) ? + a->desc.sadb_alg_id : 0; } sa->sadb_sa_encrypt = 0; BUG_ON(x->ealg && x->calg); if (x->ealg) { struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0); - sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; + sa->sadb_sa_encrypt = (a && a->pfkey_supported) ? + a->desc.sadb_alg_id : 0; } /* KAME compatible: sadb_sa_encrypt is overloaded with calg id */ if (x->calg) { struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0); - sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0; + sa->sadb_sa_encrypt = (a && a->pfkey_supported) ? + a->desc.sadb_alg_id : 0; } sa->sadb_sa_flags = 0; @@ -1137,7 +1140,7 @@ static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net, if (sa->sadb_sa_auth) { int keysize = 0; struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth); - if (!a) { + if (!a || !a->pfkey_supported) { err = -ENOSYS; goto out; } @@ -1159,7 +1162,7 @@ static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net, if (sa->sadb_sa_encrypt) { if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) { struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt); - if (!a) { + if (!a || !a->pfkey_supported) { err = -ENOSYS; goto out; } @@ -1171,7 +1174,7 @@ static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net, } else { int keysize = 0; struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt); - if (!a) { + if (!a || !a->pfkey_supported) { err = -ENOSYS; goto out; } @@ -1577,13 +1580,13 @@ static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig, struct sadb_msg *hdr; int len, auth_len, enc_len, i; - auth_len = xfrm_count_auth_supported(); + auth_len = xfrm_count_pfkey_auth_supported(); if (auth_len) { auth_len *= sizeof(struct sadb_alg); auth_len += sizeof(struct sadb_supported); } - enc_len = xfrm_count_enc_supported(); + enc_len = xfrm_count_pfkey_enc_supported(); if (enc_len) { enc_len *= sizeof(struct sadb_alg); enc_len += sizeof(struct sadb_supported); @@ -1614,6 +1617,8 @@ static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig, struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); if (!aalg) break; + if (!aalg->pfkey_supported) + continue; if (aalg->available) *ap++ = aalg->desc; } @@ -1633,6 +1638,8 @@ static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig, struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i); if (!ealg) break; + if (!ealg->pfkey_supported) + continue; if (ealg->available) *ap++ = ealg->desc; } @@ -2824,6 +2831,8 @@ static int count_ah_combs(const struct xfrm_tmpl *t) const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i); if (!aalg) break; + if (!aalg->pfkey_supported) + continue; if (aalg_tmpl_set(t, aalg) && aalg->available) sz += sizeof(struct sadb_comb); } @@ -2839,6 +2848,9 @@ static int count_esp_combs(const struct xfrm_tmpl *t) if (!ealg) break; + if (!ealg->pfkey_supported) + continue; + if (!(ealg_tmpl_set(t, ealg) && ealg->available)) continue; @@ -2847,6 +2859,9 @@ static int count_esp_combs(const struct xfrm_tmpl *t) if (!aalg) break; + if (!aalg->pfkey_supported) + continue; + if (aalg_tmpl_set(t, aalg) && aalg->available) sz += sizeof(struct sadb_comb); } @@ -2870,6 +2885,9 @@ static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) if (!aalg) break; + if (!aalg->pfkey_supported) + continue; + if (aalg_tmpl_set(t, aalg) && aalg->available) { struct sadb_comb *c; c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); @@ -2902,6 +2920,9 @@ static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) if (!ealg) break; + if (!ealg->pfkey_supported) + continue; + if (!(ealg_tmpl_set(t, ealg) && ealg->available)) continue; @@ -2910,6 +2931,8 @@ static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k); if (!aalg) break; + if (!aalg->pfkey_supported) + continue; if (!(aalg_tmpl_set(t, aalg) && aalg->available)) continue; c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb)); diff --git a/net/xfrm/xfrm_algo.c b/net/xfrm/xfrm_algo.c index f9a54955474..6fb9d00a75d 100644 --- a/net/xfrm/xfrm_algo.c +++ b/net/xfrm/xfrm_algo.c @@ -35,6 +35,8 @@ static struct xfrm_algo_desc aead_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV8, .sadb_alg_ivlen = 8, @@ -51,6 +53,8 @@ static struct xfrm_algo_desc aead_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV12, .sadb_alg_ivlen = 8, @@ -67,6 +71,8 @@ static struct xfrm_algo_desc aead_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV16, .sadb_alg_ivlen = 8, @@ -83,6 +89,8 @@ static struct xfrm_algo_desc aead_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV8, .sadb_alg_ivlen = 8, @@ -99,6 +107,8 @@ static struct xfrm_algo_desc aead_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV12, .sadb_alg_ivlen = 8, @@ -115,6 +125,8 @@ static struct xfrm_algo_desc aead_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV16, .sadb_alg_ivlen = 8, @@ -131,6 +143,8 @@ static struct xfrm_algo_desc aead_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_EALG_NULL_AES_GMAC, .sadb_alg_ivlen = 8, @@ -151,6 +165,8 @@ static struct xfrm_algo_desc aalg_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_AALG_NULL, .sadb_alg_ivlen = 0, @@ -169,6 +185,8 @@ static struct xfrm_algo_desc aalg_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_AALG_MD5HMAC, .sadb_alg_ivlen = 0, @@ -187,6 +205,8 @@ static struct xfrm_algo_desc aalg_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_AALG_SHA1HMAC, .sadb_alg_ivlen = 0, @@ -205,6 +225,8 @@ static struct xfrm_algo_desc aalg_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_AALG_SHA2_256HMAC, .sadb_alg_ivlen = 0, @@ -222,6 +244,8 @@ static struct xfrm_algo_desc aalg_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_AALG_SHA2_384HMAC, .sadb_alg_ivlen = 0, @@ -239,6 +263,8 @@ static struct xfrm_algo_desc aalg_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_AALG_SHA2_512HMAC, .sadb_alg_ivlen = 0, @@ -257,6 +283,8 @@ static struct xfrm_algo_desc aalg_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_AALG_RIPEMD160HMAC, .sadb_alg_ivlen = 0, @@ -274,6 +302,8 @@ static struct xfrm_algo_desc aalg_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_AALG_AES_XCBC_MAC, .sadb_alg_ivlen = 0, @@ -295,6 +325,8 @@ static struct xfrm_algo_desc ealg_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_EALG_NULL, .sadb_alg_ivlen = 0, @@ -313,6 +345,8 @@ static struct xfrm_algo_desc ealg_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_EALG_DESCBC, .sadb_alg_ivlen = 8, @@ -331,6 +365,8 @@ static struct xfrm_algo_desc ealg_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_EALG_3DESCBC, .sadb_alg_ivlen = 8, @@ -349,6 +385,8 @@ static struct xfrm_algo_desc ealg_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_EALG_CASTCBC, .sadb_alg_ivlen = 8, @@ -367,6 +405,8 @@ static struct xfrm_algo_desc ealg_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_EALG_BLOWFISHCBC, .sadb_alg_ivlen = 8, @@ -385,6 +425,8 @@ static struct xfrm_algo_desc ealg_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_EALG_AESCBC, .sadb_alg_ivlen = 8, @@ -403,6 +445,8 @@ static struct xfrm_algo_desc ealg_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_EALG_SERPENTCBC, .sadb_alg_ivlen = 8, @@ -421,6 +465,8 @@ static struct xfrm_algo_desc ealg_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_EALG_CAMELLIACBC, .sadb_alg_ivlen = 8, @@ -439,6 +485,8 @@ static struct xfrm_algo_desc ealg_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_EALG_TWOFISHCBC, .sadb_alg_ivlen = 8, @@ -456,6 +504,8 @@ static struct xfrm_algo_desc ealg_list[] = { } }, + .pfkey_supported = 1, + .desc = { .sadb_alg_id = SADB_X_EALG_AESCTR, .sadb_alg_ivlen = 8, @@ -473,6 +523,7 @@ static struct xfrm_algo_desc calg_list[] = { .threshold = 90, } }, + .pfkey_supported = 1, .desc = { .sadb_alg_id = SADB_X_CALG_DEFLATE } }, { @@ -482,6 +533,7 @@ static struct xfrm_algo_desc calg_list[] = { .threshold = 90, } }, + .pfkey_supported = 1, .desc = { .sadb_alg_id = SADB_X_CALG_LZS } }, { @@ -491,6 +543,7 @@ static struct xfrm_algo_desc calg_list[] = { .threshold = 50, } }, + .pfkey_supported = 1, .desc = { .sadb_alg_id = SADB_X_CALG_LZJH } }, }; @@ -714,27 +767,27 @@ void xfrm_probe_algs(void) } EXPORT_SYMBOL_GPL(xfrm_probe_algs); -int xfrm_count_auth_supported(void) +int xfrm_count_pfkey_auth_supported(void) { int i, n; for (i = 0, n = 0; i < aalg_entries(); i++) - if (aalg_list[i].available) + if (aalg_list[i].available && aalg_list[i].pfkey_supported) n++; return n; } -EXPORT_SYMBOL_GPL(xfrm_count_auth_supported); +EXPORT_SYMBOL_GPL(xfrm_count_pfkey_auth_supported); -int xfrm_count_enc_supported(void) +int xfrm_count_pfkey_enc_supported(void) { int i, n; for (i = 0, n = 0; i < ealg_entries(); i++) - if (ealg_list[i].available) + if (ealg_list[i].available && ealg_list[i].pfkey_supported) n++; return n; } -EXPORT_SYMBOL_GPL(xfrm_count_enc_supported); +EXPORT_SYMBOL_GPL(xfrm_count_pfkey_enc_supported); #if defined(CONFIG_INET_ESP) || defined(CONFIG_INET_ESP_MODULE) || defined(CONFIG_INET6_ESP) || defined(CONFIG_INET6_ESP_MODULE) -- cgit v1.2.3-70-g09d2 From a0073fe18e718a1c815fe8b0120f1ac3c60284ba Mon Sep 17 00:00:00 2001 From: Steffen Klassert Date: Tue, 5 Feb 2013 12:52:55 +0100 Subject: xfrm: Add a state resolution packet queue As the default, we blackhole packets until the key manager resolves the states. This patch implements a packet queue where IPsec packets are queued until the states are resolved. We generate a dummy xfrm bundle, the output routine of the returned route enqueues the packet to a per policy queue and arms a timer that checks for state resolution when dst_output() is called. Once the states are resolved, the packets are sent out of the queue. If the states are not resolved after some time, the queue is flushed. This patch keeps the defaut behaviour to blackhole packets as long as we have no states. To enable the packet queue the sysctl xfrm_larval_drop must be switched off. Signed-off-by: Steffen Klassert --- include/net/dst.h | 1 + include/net/xfrm.h | 7 ++ net/xfrm/xfrm_policy.c | 229 ++++++++++++++++++++++++++++++++++++++++++++++++- 3 files changed, 233 insertions(+), 4 deletions(-) (limited to 'include/net/xfrm.h') diff --git a/include/net/dst.h b/include/net/dst.h index 9a7881066fb..3da47e0a4a1 100644 --- a/include/net/dst.h +++ b/include/net/dst.h @@ -61,6 +61,7 @@ struct dst_entry { #define DST_NOPEER 0x0040 #define DST_FAKE_RTABLE 0x0080 #define DST_XFRM_TUNNEL 0x0100 +#define DST_XFRM_QUEUE 0x0200 unsigned short pending_confirm; diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 814a1baa175..30f3e5b362e 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -501,6 +501,12 @@ struct xfrm_policy_walk { u32 seq; }; +struct xfrm_policy_queue { + struct sk_buff_head hold_queue; + struct timer_list hold_timer; + unsigned long timeout; +}; + struct xfrm_policy { #ifdef CONFIG_NET_NS struct net *xp_net; @@ -522,6 +528,7 @@ struct xfrm_policy { struct xfrm_lifetime_cfg lft; struct xfrm_lifetime_cur curlft; struct xfrm_policy_walk_entry walk; + struct xfrm_policy_queue polq; u8 type; u8 action; u8 flags; diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index 41eabc46f11..456b11b0f04 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -35,6 +35,10 @@ #include "xfrm_hash.h" +#define XFRM_QUEUE_TMO_MIN ((unsigned)(HZ/10)) +#define XFRM_QUEUE_TMO_MAX ((unsigned)(60*HZ)) +#define XFRM_MAX_QUEUE_LEN 100 + DEFINE_MUTEX(xfrm_cfg_mutex); EXPORT_SYMBOL(xfrm_cfg_mutex); @@ -51,7 +55,7 @@ static struct kmem_cache *xfrm_dst_cache __read_mostly; static void xfrm_init_pmtu(struct dst_entry *dst); static int stale_bundle(struct dst_entry *dst); static int xfrm_bundle_ok(struct xfrm_dst *xdst); - +static void xfrm_policy_queue_process(unsigned long arg); static struct xfrm_policy *__xfrm_policy_unlink(struct xfrm_policy *pol, int dir); @@ -287,8 +291,11 @@ struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp) INIT_HLIST_NODE(&policy->byidx); rwlock_init(&policy->lock); atomic_set(&policy->refcnt, 1); + skb_queue_head_init(&policy->polq.hold_queue); setup_timer(&policy->timer, xfrm_policy_timer, (unsigned long)policy); + setup_timer(&policy->polq.hold_timer, xfrm_policy_queue_process, + (unsigned long)policy); policy->flo.ops = &xfrm_policy_fc_ops; } return policy; @@ -309,6 +316,16 @@ void xfrm_policy_destroy(struct xfrm_policy *policy) } EXPORT_SYMBOL(xfrm_policy_destroy); +static void xfrm_queue_purge(struct sk_buff_head *list) +{ + struct sk_buff *skb; + + while ((skb = skb_dequeue(list)) != NULL) { + dev_put(skb->dev); + kfree_skb(skb); + } +} + /* Rule must be locked. Release descentant resources, announce * entry dead. The rule must be unlinked from lists to the moment. */ @@ -319,6 +336,9 @@ static void xfrm_policy_kill(struct xfrm_policy *policy) atomic_inc(&policy->genid); + del_timer(&policy->polq.hold_timer); + xfrm_queue_purge(&policy->polq.hold_queue); + if (del_timer(&policy->timer)) xfrm_pol_put(policy); @@ -562,6 +582,31 @@ static inline int selector_cmp(struct xfrm_selector *s1, struct xfrm_selector *s return 0; } +static void xfrm_policy_requeue(struct xfrm_policy *old, + struct xfrm_policy *new) +{ + struct xfrm_policy_queue *pq = &old->polq; + struct sk_buff_head list; + + __skb_queue_head_init(&list); + + spin_lock_bh(&pq->hold_queue.lock); + skb_queue_splice_init(&pq->hold_queue, &list); + del_timer(&pq->hold_timer); + spin_unlock_bh(&pq->hold_queue.lock); + + if (skb_queue_empty(&list)) + return; + + pq = &new->polq; + + spin_lock_bh(&pq->hold_queue.lock); + skb_queue_splice(&list, &pq->hold_queue); + pq->timeout = XFRM_QUEUE_TMO_MIN; + mod_timer(&pq->hold_timer, jiffies); + spin_unlock_bh(&pq->hold_queue.lock); +} + int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl) { struct net *net = xp_net(policy); @@ -603,8 +648,10 @@ int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl) net->xfrm.policy_count[dir]++; atomic_inc(&flow_cache_genid); rt_genid_bump(net); - if (delpol) + if (delpol) { + xfrm_policy_requeue(delpol, policy); __xfrm_policy_unlink(delpol, dir); + } policy->index = delpol ? delpol->index : xfrm_gen_index(net, dir); hlist_add_head(&policy->byidx, net->xfrm.policy_byidx+idx_hash(net, policy->index)); policy->curlft.add_time = get_seconds(); @@ -1115,11 +1162,15 @@ int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol) pol->index = xfrm_gen_index(net, XFRM_POLICY_MAX+dir); __xfrm_policy_link(pol, XFRM_POLICY_MAX+dir); } - if (old_pol) + if (old_pol) { + if (pol) + xfrm_policy_requeue(old_pol, pol); + /* Unlinking succeeds always. This is the only function * allowed to delete or replace socket policy. */ __xfrm_policy_unlink(old_pol, XFRM_POLICY_MAX+dir); + } write_unlock_bh(&xfrm_policy_lock); if (old_pol) { @@ -1310,6 +1361,8 @@ static struct flow_cache_object *xfrm_bundle_flo_get(struct flow_cache_object *f * It means we need to try again resolving. */ if (xdst->num_xfrms > 0) return NULL; + } else if (dst->flags & DST_XFRM_QUEUE) { + return NULL; } else { /* Real bundle */ if (stale_bundle(dst)) @@ -1673,6 +1726,171 @@ xfrm_resolve_and_create_bundle(struct xfrm_policy **pols, int num_pols, return xdst; } +static void xfrm_policy_queue_process(unsigned long arg) +{ + int err = 0; + struct sk_buff *skb; + struct sock *sk; + struct dst_entry *dst; + struct net_device *dev; + struct xfrm_policy *pol = (struct xfrm_policy *)arg; + struct xfrm_policy_queue *pq = &pol->polq; + struct flowi fl; + struct sk_buff_head list; + + spin_lock(&pq->hold_queue.lock); + skb = skb_peek(&pq->hold_queue); + dst = skb_dst(skb); + sk = skb->sk; + xfrm_decode_session(skb, &fl, dst->ops->family); + spin_unlock(&pq->hold_queue.lock); + + dst_hold(dst->path); + dst = xfrm_lookup(xp_net(pol), dst->path, &fl, + sk, 0); + if (IS_ERR(dst)) + goto purge_queue; + + if (dst->flags & DST_XFRM_QUEUE) { + dst_release(dst); + + if (pq->timeout >= XFRM_QUEUE_TMO_MAX) + goto purge_queue; + + pq->timeout = pq->timeout << 1; + mod_timer(&pq->hold_timer, jiffies + pq->timeout); + return; + } + + dst_release(dst); + + __skb_queue_head_init(&list); + + spin_lock(&pq->hold_queue.lock); + pq->timeout = 0; + skb_queue_splice_init(&pq->hold_queue, &list); + spin_unlock(&pq->hold_queue.lock); + + while (!skb_queue_empty(&list)) { + skb = __skb_dequeue(&list); + + xfrm_decode_session(skb, &fl, skb_dst(skb)->ops->family); + dst_hold(skb_dst(skb)->path); + dst = xfrm_lookup(xp_net(pol), skb_dst(skb)->path, + &fl, skb->sk, 0); + if (IS_ERR(dst)) { + dev_put(skb->dev); + kfree_skb(skb); + continue; + } + + nf_reset(skb); + skb_dst_drop(skb); + skb_dst_set(skb, dst); + + dev = skb->dev; + err = dst_output(skb); + dev_put(dev); + } + + return; + +purge_queue: + pq->timeout = 0; + xfrm_queue_purge(&pq->hold_queue); +} + +static int xdst_queue_output(struct sk_buff *skb) +{ + unsigned long sched_next; + struct dst_entry *dst = skb_dst(skb); + struct xfrm_dst *xdst = (struct xfrm_dst *) dst; + struct xfrm_policy_queue *pq = &xdst->pols[0]->polq; + + if (pq->hold_queue.qlen > XFRM_MAX_QUEUE_LEN) { + kfree_skb(skb); + return -EAGAIN; + } + + skb_dst_force(skb); + dev_hold(skb->dev); + + spin_lock_bh(&pq->hold_queue.lock); + + if (!pq->timeout) + pq->timeout = XFRM_QUEUE_TMO_MIN; + + sched_next = jiffies + pq->timeout; + + if (del_timer(&pq->hold_timer)) { + if (time_before(pq->hold_timer.expires, sched_next)) + sched_next = pq->hold_timer.expires; + } + + __skb_queue_tail(&pq->hold_queue, skb); + mod_timer(&pq->hold_timer, sched_next); + + spin_unlock_bh(&pq->hold_queue.lock); + + return 0; +} + +static struct xfrm_dst *xfrm_create_dummy_bundle(struct net *net, + struct dst_entry *dst, + const struct flowi *fl, + int num_xfrms, + u16 family) +{ + int err; + struct net_device *dev; + struct dst_entry *dst1; + struct xfrm_dst *xdst; + + xdst = xfrm_alloc_dst(net, family); + if (IS_ERR(xdst)) + return xdst; + + if (net->xfrm.sysctl_larval_drop || num_xfrms <= 0 || + (fl->flowi_flags & FLOWI_FLAG_CAN_SLEEP)) + return xdst; + + dst1 = &xdst->u.dst; + dst_hold(dst); + xdst->route = dst; + + dst_copy_metrics(dst1, dst); + + dst1->obsolete = DST_OBSOLETE_FORCE_CHK; + dst1->flags |= DST_HOST | DST_XFRM_QUEUE; + dst1->lastuse = jiffies; + + dst1->input = dst_discard; + dst1->output = xdst_queue_output; + + dst_hold(dst); + dst1->child = dst; + dst1->path = dst; + + xfrm_init_path((struct xfrm_dst *)dst1, dst, 0); + + err = -ENODEV; + dev = dst->dev; + if (!dev) + goto free_dst; + + err = xfrm_fill_dst(xdst, dev, fl); + if (err) + goto free_dst; + +out: + return xdst; + +free_dst: + dst_release(dst1); + xdst = ERR_PTR(err); + goto out; +} + static struct flow_cache_object * xfrm_bundle_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir, struct flow_cache_object *oldflo, void *ctx) @@ -1751,7 +1969,7 @@ make_dummy_bundle: /* We found policies, but there's no bundles to instantiate: * either because the policy blocks, has no transformations or * we could not build template (no xfrm_states).*/ - xdst = xfrm_alloc_dst(net, family); + xdst = xfrm_create_dummy_bundle(net, dst_orig, fl, num_xfrms, family); if (IS_ERR(xdst)) { xfrm_pols_put(pols, num_pols); return ERR_CAST(xdst); @@ -2359,6 +2577,9 @@ static int xfrm_bundle_ok(struct xfrm_dst *first) (dst->dev && !netif_running(dst->dev))) return 0; + if (dst->flags & DST_XFRM_QUEUE) + return 1; + last = NULL; do { -- cgit v1.2.3-70-g09d2