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 000000000000..223a2e83853f
--- /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);
+}
+