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Diffstat (limited to 'net/ipv4/xfrm4_state.c')
-rw-r--r--net/ipv4/xfrm4_state.c126
1 files changed, 126 insertions, 0 deletions
diff --git a/net/ipv4/xfrm4_state.c b/net/ipv4/xfrm4_state.c
new file mode 100644
index 00000000000..223a2e83853
--- /dev/null
+++ b/net/ipv4/xfrm4_state.c
@@ -0,0 +1,126 @@
+/*
+ * xfrm4_state.c
+ *
+ * Changes:
+ * YOSHIFUJI Hideaki @USAGI
+ * Split up af-specific portion
+ *
+ */
+
+#include <net/xfrm.h>
+#include <linux/pfkeyv2.h>
+#include <linux/ipsec.h>
+
+static struct xfrm_state_afinfo xfrm4_state_afinfo;
+
+static void
+__xfrm4_init_tempsel(struct xfrm_state *x, struct flowi *fl,
+ struct xfrm_tmpl *tmpl,
+ xfrm_address_t *daddr, xfrm_address_t *saddr)
+{
+ x->sel.daddr.a4 = fl->fl4_dst;
+ x->sel.saddr.a4 = fl->fl4_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 = 32;
+ x->sel.prefixlen_s = 32;
+ x->sel.proto = fl->proto;
+ x->sel.ifindex = fl->oif;
+ x->id = tmpl->id;
+ if (x->id.daddr.a4 == 0)
+ x->id.daddr.a4 = daddr->a4;
+ x->props.saddr = tmpl->saddr;
+ if (x->props.saddr.a4 == 0)
+ x->props.saddr.a4 = saddr->a4;
+ x->props.mode = tmpl->mode;
+ x->props.reqid = tmpl->reqid;
+ x->props.family = AF_INET;
+}
+
+static struct xfrm_state *
+__xfrm4_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto)
+{
+ unsigned h = __xfrm4_spi_hash(daddr, spi, proto);
+ struct xfrm_state *x;
+
+ list_for_each_entry(x, xfrm4_state_afinfo.state_byspi+h, byspi) {
+ if (x->props.family == AF_INET &&
+ spi == x->id.spi &&
+ daddr->a4 == x->id.daddr.a4 &&
+ proto == x->id.proto) {
+ xfrm_state_hold(x);
+ return x;
+ }
+ }
+ return NULL;
+}
+
+static struct xfrm_state *
+__xfrm4_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 = __xfrm4_dst_hash(daddr);
+
+ x0 = NULL;
+
+ list_for_each_entry(x, xfrm4_state_afinfo.state_bydst+h, bydst) {
+ if (x->props.family == AF_INET &&
+ daddr->a4 == x->id.daddr.a4 &&
+ mode == x->props.mode &&
+ proto == x->id.proto &&
+ saddr->a4 == x->props.saddr.a4 &&
+ reqid == x->props.reqid &&
+ x->km.state == XFRM_STATE_ACQ &&
+ !x->id.spi) {
+ x0 = x;
+ break;
+ }
+ }
+ if (!x0 && create && (x0 = xfrm_state_alloc()) != NULL) {
+ x0->sel.daddr.a4 = daddr->a4;
+ x0->sel.saddr.a4 = saddr->a4;
+ x0->sel.prefixlen_d = 32;
+ x0->sel.prefixlen_s = 32;
+ x0->props.saddr.a4 = saddr->a4;
+ x0->km.state = XFRM_STATE_ACQ;
+ x0->id.daddr.a4 = daddr->a4;
+ x0->id.proto = proto;
+ x0->props.family = AF_INET;
+ x0->props.mode = mode;
+ x0->props.reqid = reqid;
+ x0->props.family = AF_INET;
+ 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, xfrm4_state_afinfo.state_bydst+h);
+ wake_up(&km_waitq);
+ }
+ if (x0)
+ xfrm_state_hold(x0);
+ return x0;
+}
+
+static struct xfrm_state_afinfo xfrm4_state_afinfo = {
+ .family = AF_INET,
+ .lock = RW_LOCK_UNLOCKED,
+ .init_tempsel = __xfrm4_init_tempsel,
+ .state_lookup = __xfrm4_state_lookup,
+ .find_acq = __xfrm4_find_acq,
+};
+
+void __init xfrm4_state_init(void)
+{
+ xfrm_state_register_afinfo(&xfrm4_state_afinfo);
+}
+
+void __exit xfrm4_state_fini(void)
+{
+ xfrm_state_unregister_afinfo(&xfrm4_state_afinfo);
+}
+