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Diffstat (limited to 'net/ipv6/xfrm6_state.c')
-rw-r--r--net/ipv6/xfrm6_state.c136
1 files changed, 136 insertions, 0 deletions
diff --git a/net/ipv6/xfrm6_state.c b/net/ipv6/xfrm6_state.c
new file mode 100644
index 000000000000..bf0d0abc3871
--- /dev/null
+++ b/net/ipv6/xfrm6_state.c
@@ -0,0 +1,136 @@
+/*
+ * xfrm6_state.c: based on xfrm4_state.c
+ *
+ * Authors:
+ * Mitsuru KANDA @USAGI
+ * Kazunori MIYAZAWA @USAGI
+ * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
+ * IPv6 support
+ * YOSHIFUJI Hideaki @USAGI
+ * Split up af-specific portion
+ *
+ */
+
+#include <net/xfrm.h>
+#include <linux/pfkeyv2.h>
+#include <linux/ipsec.h>
+#include <net/ipv6.h>
+
+static struct xfrm_state_afinfo xfrm6_state_afinfo;
+
+static void
+__xfrm6_init_tempsel(struct xfrm_state *x, struct flowi *fl,
+ struct xfrm_tmpl *tmpl,
+ xfrm_address_t *daddr, xfrm_address_t *saddr)
+{
+ /* Initialize temporary selector matching only
+ * to current session. */
+ ipv6_addr_copy((struct in6_addr *)&x->sel.daddr, &fl->fl6_dst);
+ ipv6_addr_copy((struct in6_addr *)&x->sel.saddr, &fl->fl6_src);
+ x->sel.dport = xfrm_flowi_dport(fl);
+ x->sel.dport_mask = ~0;
+ x->sel.sport = xfrm_flowi_sport(fl);
+ x->sel.sport_mask = ~0;
+ x->sel.prefixlen_d = 128;
+ x->sel.prefixlen_s = 128;
+ x->sel.proto = fl->proto;
+ x->sel.ifindex = fl->oif;
+ x->id = tmpl->id;
+ if (ipv6_addr_any((struct in6_addr*)&x->id.daddr))
+ memcpy(&x->id.daddr, daddr, sizeof(x->sel.daddr));
+ memcpy(&x->props.saddr, &tmpl->saddr, sizeof(x->props.saddr));
+ if (ipv6_addr_any((struct in6_addr*)&x->props.saddr))
+ memcpy(&x->props.saddr, saddr, sizeof(x->props.saddr));
+ x->props.mode = tmpl->mode;
+ x->props.reqid = tmpl->reqid;
+ x->props.family = AF_INET6;
+}
+
+static struct xfrm_state *
+__xfrm6_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto)
+{
+ unsigned h = __xfrm6_spi_hash(daddr, spi, proto);
+ struct xfrm_state *x;
+
+ list_for_each_entry(x, xfrm6_state_afinfo.state_byspi+h, byspi) {
+ if (x->props.family == AF_INET6 &&
+ spi == x->id.spi &&
+ ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)x->id.daddr.a6) &&
+ proto == x->id.proto) {
+ xfrm_state_hold(x);
+ return x;
+ }
+ }
+ return NULL;
+}
+
+static struct xfrm_state *
+__xfrm6_find_acq(u8 mode, u32 reqid, u8 proto,
+ xfrm_address_t *daddr, xfrm_address_t *saddr,
+ int create)
+{
+ struct xfrm_state *x, *x0;
+ unsigned h = __xfrm6_dst_hash(daddr);
+
+ x0 = NULL;
+
+ list_for_each_entry(x, xfrm6_state_afinfo.state_bydst+h, bydst) {
+ if (x->props.family == AF_INET6 &&
+ ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)x->id.daddr.a6) &&
+ mode == x->props.mode &&
+ proto == x->id.proto &&
+ ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)x->props.saddr.a6) &&
+ reqid == x->props.reqid &&
+ x->km.state == XFRM_STATE_ACQ &&
+ !x->id.spi) {
+ x0 = x;
+ break;
+ }
+ }
+ if (!x0 && create && (x0 = xfrm_state_alloc()) != NULL) {
+ ipv6_addr_copy((struct in6_addr *)x0->sel.daddr.a6,
+ (struct in6_addr *)daddr);
+ ipv6_addr_copy((struct in6_addr *)x0->sel.saddr.a6,
+ (struct in6_addr *)saddr);
+ x0->sel.prefixlen_d = 128;
+ x0->sel.prefixlen_s = 128;
+ ipv6_addr_copy((struct in6_addr *)x0->props.saddr.a6,
+ (struct in6_addr *)saddr);
+ x0->km.state = XFRM_STATE_ACQ;
+ ipv6_addr_copy((struct in6_addr *)x0->id.daddr.a6,
+ (struct in6_addr *)daddr);
+ x0->id.proto = proto;
+ x0->props.family = AF_INET6;
+ x0->props.mode = mode;
+ x0->props.reqid = reqid;
+ x0->lft.hard_add_expires_seconds = XFRM_ACQ_EXPIRES;
+ xfrm_state_hold(x0);
+ x0->timer.expires = jiffies + XFRM_ACQ_EXPIRES*HZ;
+ add_timer(&x0->timer);
+ xfrm_state_hold(x0);
+ list_add_tail(&x0->bydst, xfrm6_state_afinfo.state_bydst+h);
+ wake_up(&km_waitq);
+ }
+ if (x0)
+ xfrm_state_hold(x0);
+ return x0;
+}
+
+static struct xfrm_state_afinfo xfrm6_state_afinfo = {
+ .family = AF_INET6,
+ .lock = RW_LOCK_UNLOCKED,
+ .init_tempsel = __xfrm6_init_tempsel,
+ .state_lookup = __xfrm6_state_lookup,
+ .find_acq = __xfrm6_find_acq,
+};
+
+void __init xfrm6_state_init(void)
+{
+ xfrm_state_register_afinfo(&xfrm6_state_afinfo);
+}
+
+void xfrm6_state_fini(void)
+{
+ xfrm_state_unregister_afinfo(&xfrm6_state_afinfo);
+}
+