[XFRM] STATE: Search by address using source address list.
This is a support to search transformation states by its addresses by using source address list for Mobile IPv6 usage. To use it from user-space, it is also added a message type for source address as a xfrm state option. Based on MIPL2 kernel patch. Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org> Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
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6c44e6b7ab
commit
eb2971b68a
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@ -234,6 +234,7 @@ enum xfrm_attr_type_t {
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XFRMA_REPLAY_VAL,
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XFRMA_REPLAY_VAL,
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XFRMA_REPLAY_THRESH,
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XFRMA_REPLAY_THRESH,
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XFRMA_ETIMER_THRESH,
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XFRMA_ETIMER_THRESH,
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XFRMA_SRCADDR, /* xfrm_address_t */
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__XFRMA_MAX
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__XFRMA_MAX
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#define XFRMA_MAX (__XFRMA_MAX - 1)
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#define XFRMA_MAX (__XFRMA_MAX - 1)
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@ -244,6 +244,7 @@ struct xfrm_state_afinfo {
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struct xfrm_tmpl *tmpl,
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struct xfrm_tmpl *tmpl,
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xfrm_address_t *daddr, xfrm_address_t *saddr);
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xfrm_address_t *daddr, xfrm_address_t *saddr);
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struct xfrm_state *(*state_lookup)(xfrm_address_t *daddr, u32 spi, u8 proto);
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struct xfrm_state *(*state_lookup)(xfrm_address_t *daddr, u32 spi, u8 proto);
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struct xfrm_state *(*state_lookup_byaddr)(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto);
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struct xfrm_state *(*find_acq)(u8 mode, u32 reqid, u8 proto,
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struct xfrm_state *(*find_acq)(u8 mode, u32 reqid, u8 proto,
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xfrm_address_t *daddr, xfrm_address_t *saddr,
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xfrm_address_t *daddr, xfrm_address_t *saddr,
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int create);
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int create);
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@ -937,6 +938,7 @@ extern void xfrm_state_insert(struct xfrm_state *x);
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extern int xfrm_state_add(struct xfrm_state *x);
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extern int xfrm_state_add(struct xfrm_state *x);
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extern int xfrm_state_update(struct xfrm_state *x);
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extern int xfrm_state_update(struct xfrm_state *x);
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extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto, unsigned short family);
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extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto, unsigned short family);
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extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family);
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extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq);
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extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq);
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extern int xfrm_state_delete(struct xfrm_state *x);
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extern int xfrm_state_delete(struct xfrm_state *x);
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extern void xfrm_state_flush(u8 proto);
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extern void xfrm_state_flush(u8 proto);
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@ -80,6 +80,14 @@ __xfrm4_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto)
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return NULL;
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return NULL;
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}
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}
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/* placeholder until ipv4's code is written */
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static struct xfrm_state *
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__xfrm4_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr,
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u8 proto)
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{
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return NULL;
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}
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static struct xfrm_state *
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static struct xfrm_state *
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__xfrm4_find_acq(u8 mode, u32 reqid, u8 proto,
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__xfrm4_find_acq(u8 mode, u32 reqid, u8 proto,
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xfrm_address_t *daddr, xfrm_address_t *saddr,
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xfrm_address_t *daddr, xfrm_address_t *saddr,
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@ -137,6 +145,7 @@ static struct xfrm_state_afinfo xfrm4_state_afinfo = {
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.init_flags = xfrm4_init_flags,
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.init_flags = xfrm4_init_flags,
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.init_tempsel = __xfrm4_init_tempsel,
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.init_tempsel = __xfrm4_init_tempsel,
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.state_lookup = __xfrm4_state_lookup,
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.state_lookup = __xfrm4_state_lookup,
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.state_lookup_byaddr = __xfrm4_state_lookup_byaddr,
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.find_acq = __xfrm4_find_acq,
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.find_acq = __xfrm4_find_acq,
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};
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};
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@ -63,6 +63,26 @@ __xfrm6_init_tempsel(struct xfrm_state *x, struct flowi *fl,
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x->props.family = AF_INET6;
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x->props.family = AF_INET6;
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}
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}
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static struct xfrm_state *
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__xfrm6_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr,
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u8 proto)
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{
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struct xfrm_state *x = NULL;
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unsigned h;
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h = __xfrm6_src_hash(saddr);
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list_for_each_entry(x, xfrm6_state_afinfo.state_bysrc+h, bysrc) {
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if (x->props.family == AF_INET6 &&
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ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)x->id.daddr.a6) &&
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ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)x->props.saddr.a6) &&
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proto == x->id.proto) {
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xfrm_state_hold(x);
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return x;
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}
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}
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return NULL;
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}
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static struct xfrm_state *
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static struct xfrm_state *
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__xfrm6_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto)
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__xfrm6_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto)
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{
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{
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@ -140,6 +160,7 @@ static struct xfrm_state_afinfo xfrm6_state_afinfo = {
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.family = AF_INET6,
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.family = AF_INET6,
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.init_tempsel = __xfrm6_init_tempsel,
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.init_tempsel = __xfrm6_init_tempsel,
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.state_lookup = __xfrm6_state_lookup,
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.state_lookup = __xfrm6_state_lookup,
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.state_lookup_byaddr = __xfrm6_state_lookup_byaddr,
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.find_acq = __xfrm6_find_acq,
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.find_acq = __xfrm6_find_acq,
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};
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};
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@ -487,6 +487,16 @@ void xfrm_state_insert(struct xfrm_state *x)
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}
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}
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EXPORT_SYMBOL(xfrm_state_insert);
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EXPORT_SYMBOL(xfrm_state_insert);
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static inline struct xfrm_state *
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__xfrm_state_locate(struct xfrm_state_afinfo *afinfo, struct xfrm_state *x,
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int use_spi)
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{
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if (use_spi)
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return afinfo->state_lookup(&x->id.daddr, x->id.spi, x->id.proto);
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else
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return afinfo->state_lookup_byaddr(&x->id.daddr, &x->props.saddr, x->id.proto);
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}
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static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq);
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static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq);
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int xfrm_state_add(struct xfrm_state *x)
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int xfrm_state_add(struct xfrm_state *x)
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@ -495,6 +505,7 @@ int xfrm_state_add(struct xfrm_state *x)
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struct xfrm_state *x1;
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struct xfrm_state *x1;
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int family;
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int family;
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int err;
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int err;
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int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
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family = x->props.family;
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family = x->props.family;
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afinfo = xfrm_state_get_afinfo(family);
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afinfo = xfrm_state_get_afinfo(family);
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@ -503,7 +514,7 @@ int xfrm_state_add(struct xfrm_state *x)
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spin_lock_bh(&xfrm_state_lock);
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spin_lock_bh(&xfrm_state_lock);
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x1 = afinfo->state_lookup(&x->id.daddr, x->id.spi, x->id.proto);
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x1 = __xfrm_state_locate(afinfo, x, use_spi);
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if (x1) {
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if (x1) {
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xfrm_state_put(x1);
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xfrm_state_put(x1);
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x1 = NULL;
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x1 = NULL;
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@ -511,7 +522,7 @@ int xfrm_state_add(struct xfrm_state *x)
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goto out;
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goto out;
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}
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}
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if (x->km.seq) {
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if (use_spi && x->km.seq) {
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x1 = __xfrm_find_acq_byseq(x->km.seq);
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x1 = __xfrm_find_acq_byseq(x->km.seq);
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if (x1 && xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family)) {
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if (x1 && xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family)) {
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xfrm_state_put(x1);
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xfrm_state_put(x1);
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@ -519,7 +530,7 @@ int xfrm_state_add(struct xfrm_state *x)
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}
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}
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}
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}
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if (!x1)
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if (use_spi && !x1)
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x1 = afinfo->find_acq(
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x1 = afinfo->find_acq(
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x->props.mode, x->props.reqid, x->id.proto,
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x->props.mode, x->props.reqid, x->id.proto,
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&x->id.daddr, &x->props.saddr, 0);
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&x->id.daddr, &x->props.saddr, 0);
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@ -548,13 +559,14 @@ int xfrm_state_update(struct xfrm_state *x)
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struct xfrm_state_afinfo *afinfo;
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struct xfrm_state_afinfo *afinfo;
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struct xfrm_state *x1;
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struct xfrm_state *x1;
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int err;
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int err;
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int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
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afinfo = xfrm_state_get_afinfo(x->props.family);
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afinfo = xfrm_state_get_afinfo(x->props.family);
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if (unlikely(afinfo == NULL))
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if (unlikely(afinfo == NULL))
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return -EAFNOSUPPORT;
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return -EAFNOSUPPORT;
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spin_lock_bh(&xfrm_state_lock);
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spin_lock_bh(&xfrm_state_lock);
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x1 = afinfo->state_lookup(&x->id.daddr, x->id.spi, x->id.proto);
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x1 = __xfrm_state_locate(afinfo, x, use_spi);
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err = -ESRCH;
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err = -ESRCH;
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if (!x1)
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if (!x1)
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@ -674,6 +686,23 @@ xfrm_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto,
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}
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}
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EXPORT_SYMBOL(xfrm_state_lookup);
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EXPORT_SYMBOL(xfrm_state_lookup);
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struct xfrm_state *
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xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr,
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u8 proto, unsigned short family)
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{
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struct xfrm_state *x;
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struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
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if (!afinfo)
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return NULL;
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spin_lock_bh(&xfrm_state_lock);
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x = afinfo->state_lookup_byaddr(daddr, saddr, proto);
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spin_unlock_bh(&xfrm_state_lock);
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xfrm_state_put_afinfo(afinfo);
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return x;
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}
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EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
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struct xfrm_state *
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struct xfrm_state *
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xfrm_find_acq(u8 mode, u32 reqid, u8 proto,
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xfrm_find_acq(u8 mode, u32 reqid, u8 proto,
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xfrm_address_t *daddr, xfrm_address_t *saddr,
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xfrm_address_t *daddr, xfrm_address_t *saddr,
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@ -87,6 +87,22 @@ static int verify_encap_tmpl(struct rtattr **xfrma)
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return 0;
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return 0;
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}
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}
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static int verify_one_addr(struct rtattr **xfrma, enum xfrm_attr_type_t type,
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xfrm_address_t **addrp)
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{
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struct rtattr *rt = xfrma[type - 1];
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if (!rt)
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return 0;
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if ((rt->rta_len - sizeof(*rt)) < sizeof(**addrp))
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return -EINVAL;
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if (addrp)
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*addrp = RTA_DATA(rt);
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return 0;
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}
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static inline int verify_sec_ctx_len(struct rtattr **xfrma)
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static inline int verify_sec_ctx_len(struct rtattr **xfrma)
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{
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{
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@ -418,16 +434,48 @@ out:
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return err;
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return err;
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}
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}
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static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
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struct rtattr **xfrma,
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int *errp)
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{
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struct xfrm_state *x = NULL;
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int err;
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if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
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err = -ESRCH;
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x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
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} else {
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xfrm_address_t *saddr = NULL;
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err = verify_one_addr(xfrma, XFRMA_SRCADDR, &saddr);
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if (err)
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goto out;
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if (!saddr) {
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err = -EINVAL;
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goto out;
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}
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x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto,
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p->family);
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}
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out:
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if (!x && errp)
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*errp = err;
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return x;
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}
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static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
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static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
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{
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{
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struct xfrm_state *x;
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struct xfrm_state *x;
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int err;
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int err = -ESRCH;
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struct km_event c;
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struct km_event c;
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struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
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struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
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x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
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x = xfrm_user_state_lookup(p, (struct rtattr **)xfrma, &err);
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if (x == NULL)
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if (x == NULL)
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return -ESRCH;
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return err;
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if ((err = security_xfrm_state_delete(x)) != 0)
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if ((err = security_xfrm_state_delete(x)) != 0)
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goto out;
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goto out;
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@ -578,10 +626,9 @@ static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
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struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
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struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
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struct xfrm_state *x;
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struct xfrm_state *x;
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struct sk_buff *resp_skb;
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struct sk_buff *resp_skb;
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int err;
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int err = -ESRCH;
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x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
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x = xfrm_user_state_lookup(p, (struct rtattr **)xfrma, &err);
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err = -ESRCH;
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if (x == NULL)
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if (x == NULL)
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goto out_noput;
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goto out_noput;
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