Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 150 insertions, 0 deletions

diff --git a/net/ipv6/xfrm6_input.c b/net/ipv6/xfrm6_input.c
new file mode 100644
index 000000000000..28c29d78338e
--- /dev/null
+++ b/net/ipv6/xfrm6_input.c
@@ -0,0 +1,150 @@
+/*
+ * xfrm6_input.c: based on net/ipv4/xfrm4_input.c
+ *
+ * Authors:
+ *      Mitsuru KANDA @USAGI
+ *      Kazunori MIYAZAWA @USAGI
+ *      Kunihiro Ishiguro <kunihiro@ipinfusion.com>
+ *      YOSHIFUJI Hideaki @USAGI
+ *              IPv6 support
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <net/dsfield.h>
+#include <net/inet_ecn.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/xfrm.h>
+
+static inline void ipip6_ecn_decapsulate(struct sk_buff *skb)
+{
+        struct ipv6hdr *outer_iph = skb->nh.ipv6h;
+        struct ipv6hdr *inner_iph = skb->h.ipv6h;
+
+        if (INET_ECN_is_ce(ipv6_get_dsfield(outer_iph)))
+                IP6_ECN_set_ce(inner_iph);
+}
+
+int xfrm6_rcv_spi(struct sk_buff **pskb, unsigned int *nhoffp, u32 spi)
+{
+        struct sk_buff *skb = *pskb;
+        int err;
+        u32 seq;
+        struct sec_decap_state xfrm_vec[XFRM_MAX_DEPTH];
+        struct xfrm_state *x;
+        int xfrm_nr = 0;
+        int decaps = 0;
+        int nexthdr;
+        unsigned int nhoff;
+
+        nhoff = *nhoffp;
+        nexthdr = skb->nh.raw[nhoff];
+
+        seq = 0;
+        if (!spi && (err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) != 0)
+                goto drop;
+        
+        do {
+                struct ipv6hdr *iph = skb->nh.ipv6h;
+
+                if (xfrm_nr == XFRM_MAX_DEPTH)
+                        goto drop;
+
+                x = xfrm_state_lookup((xfrm_address_t *)&iph->daddr, spi, nexthdr, AF_INET6);
+                if (x == NULL)
+                        goto drop;
+                spin_lock(&x->lock);
+                if (unlikely(x->km.state != XFRM_STATE_VALID))
+                        goto drop_unlock;
+
+                if (x->props.replay_window && xfrm_replay_check(x, seq))
+                        goto drop_unlock;
+
+                if (xfrm_state_check_expire(x))
+                        goto drop_unlock;
+
+                nexthdr = x->type->input(x, &(xfrm_vec[xfrm_nr].decap), skb);
+                if (nexthdr <= 0)
+                        goto drop_unlock;
+
+                skb->nh.raw[nhoff] = nexthdr;
+
+                if (x->props.replay_window)
+                        xfrm_replay_advance(x, seq);
+
+                x->curlft.bytes += skb->len;
+                x->curlft.packets++;
+
+                spin_unlock(&x->lock);
+
+                xfrm_vec[xfrm_nr++].xvec = x;
+
+                if (x->props.mode) { /* XXX */
+                        if (nexthdr != IPPROTO_IPV6)
+                                goto drop;
+                        if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
+                                goto drop;
+                        if (skb_cloned(skb) &&
+                            pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
+                                goto drop;
+                        if (x->props.flags & XFRM_STATE_DECAP_DSCP)
+                                ipv6_copy_dscp(skb->nh.ipv6h, skb->h.ipv6h);
+                        if (!(x->props.flags & XFRM_STATE_NOECN))
+                                ipip6_ecn_decapsulate(skb);
+                        skb->mac.raw = memmove(skb->data - skb->mac_len,
+                                               skb->mac.raw, skb->mac_len);
+                        skb->nh.raw = skb->data;
+                        decaps = 1;
+                        break;
+                }
+
+                if ((err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) < 0)
+                        goto drop;
+        } while (!err);
+
+        /* Allocate new secpath or COW existing one. */
+        if (!skb->sp || atomic_read(&skb->sp->refcnt) != 1) {
+                struct sec_path *sp;
+                sp = secpath_dup(skb->sp);
+                if (!sp)
+                        goto drop;
+                if (skb->sp)
+                        secpath_put(skb->sp);
+                skb->sp = sp;
+        }
+
+        if (xfrm_nr + skb->sp->len > XFRM_MAX_DEPTH)
+                goto drop;
+
+        memcpy(skb->sp->x+skb->sp->len, xfrm_vec, xfrm_nr*sizeof(struct sec_decap_state));
+        skb->sp->len += xfrm_nr;
+        skb->ip_summed = CHECKSUM_NONE;
+
+        if (decaps) {
+                if (!(skb->dev->flags&IFF_LOOPBACK)) {
+                        dst_release(skb->dst);
+                        skb->dst = NULL;
+                }
+                netif_rx(skb);
+                return -1;
+        } else {
+                return 1;
+        }
+
+drop_unlock:
+        spin_unlock(&x->lock);
+        xfrm_state_put(x);
+drop:
+        while (--xfrm_nr >= 0)
+                xfrm_state_put(xfrm_vec[xfrm_nr].xvec);
+        kfree_skb(skb);
+        return -1;
+}
+
+EXPORT_SYMBOL(xfrm6_rcv_spi);
+
+int xfrm6_rcv(struct sk_buff **pskb, unsigned int *nhoffp)
+{
+        return xfrm6_rcv_spi(pskb, nhoffp, 0);
+}