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, 269 insertions, 0 deletions

diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
new file mode 100644
index 00000000000..866f10726c5
--- /dev/null
+++ b/net/ipv6/ip6_input.c
@@ -0,0 +1,269 @@
+/*
+ *	IPv6 input
+ *	Linux INET6 implementation 
+ *
+ *	Authors:
+ *	Pedro Roque		<roque@di.fc.ul.pt>
+ *	Ian P. Morris		<I.P.Morris@soton.ac.uk>
+ *
+ *	$Id: ip6_input.c,v 1.19 2000/12/13 18:31:50 davem Exp $
+ *
+ *	Based in linux/net/ipv4/ip_input.c
+ *
+ *	This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+/* Changes
+ *
+ * 	Mitsuru KANDA @USAGI and
+ * 	YOSHIFUJI Hideaki @USAGI: Remove ipv6_parse_exthdrs().
+ */
+
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/sched.h>
+#include <linux/net.h>
+#include <linux/netdevice.h>
+#include <linux/in6.h>
+#include <linux/icmpv6.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv6.h>
+
+#include <net/sock.h>
+#include <net/snmp.h>
+
+#include <net/ipv6.h>
+#include <net/protocol.h>
+#include <net/transp_v6.h>
+#include <net/rawv6.h>
+#include <net/ndisc.h>
+#include <net/ip6_route.h>
+#include <net/addrconf.h>
+#include <net/xfrm.h>
+
+
+
+static inline int ip6_rcv_finish( struct sk_buff *skb) 
+{
+	if (skb->dst == NULL)
+		ip6_route_input(skb);
+
+	return dst_input(skb);
+}
+
+int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
+{
+	struct ipv6hdr *hdr;
+	u32 		pkt_len;
+
+	if (skb->pkt_type == PACKET_OTHERHOST)
+		goto drop;
+
+	IP6_INC_STATS_BH(IPSTATS_MIB_INRECEIVES);
+
+	if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) {
+		IP6_INC_STATS_BH(IPSTATS_MIB_INDISCARDS);
+		goto out;
+	}
+
+	/*
+	 * Store incoming device index. When the packet will
+	 * be queued, we cannot refer to skb->dev anymore.
+	 *
+	 * BTW, when we send a packet for our own local address on a
+	 * non-loopback interface (e.g. ethX), it is being delivered
+	 * via the loopback interface (lo) here; skb->dev = &loopback_dev.
+	 * It, however, should be considered as if it is being
+	 * arrived via the sending interface (ethX), because of the
+	 * nature of scoping architecture. --yoshfuji
+	 */
+	IP6CB(skb)->iif = skb->dst ? ((struct rt6_info *)skb->dst)->rt6i_idev->dev->ifindex : dev->ifindex;
+
+	if (skb->len < sizeof(struct ipv6hdr))
+		goto err;
+
+	if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) {
+		IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+		goto drop;
+	}
+
+	hdr = skb->nh.ipv6h;
+
+	if (hdr->version != 6)
+		goto err;
+
+	pkt_len = ntohs(hdr->payload_len);
+
+	/* pkt_len may be zero if Jumbo payload option is present */
+	if (pkt_len || hdr->nexthdr != NEXTHDR_HOP) {
+		if (pkt_len + sizeof(struct ipv6hdr) > skb->len)
+			goto truncated;
+		if (pskb_trim_rcsum(skb, pkt_len + sizeof(struct ipv6hdr))) {
+			IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+			goto drop;
+		}
+		hdr = skb->nh.ipv6h;
+	}
+
+	if (hdr->nexthdr == NEXTHDR_HOP) {
+		skb->h.raw = (u8*)(hdr+1);
+		if (ipv6_parse_hopopts(skb, offsetof(struct ipv6hdr, nexthdr)) < 0) {
+			IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+			return 0;
+		}
+		hdr = skb->nh.ipv6h;
+	}
+
+	return NF_HOOK(PF_INET6,NF_IP6_PRE_ROUTING, skb, dev, NULL, ip6_rcv_finish);
+truncated:
+	IP6_INC_STATS_BH(IPSTATS_MIB_INTRUNCATEDPKTS);
+err:
+	IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+drop:
+	kfree_skb(skb);
+out:
+	return 0;
+}
+
+/*
+ *	Deliver the packet to the host
+ */
+
+
+static inline int ip6_input_finish(struct sk_buff *skb)
+{
+	struct inet6_protocol *ipprot;
+	struct sock *raw_sk;
+	unsigned int nhoff;
+	int nexthdr;
+	u8 hash;
+
+	skb->h.raw = skb->nh.raw + sizeof(struct ipv6hdr);
+
+	/*
+	 *	Parse extension headers
+	 */
+
+	nexthdr = skb->nh.ipv6h->nexthdr;
+	nhoff = offsetof(struct ipv6hdr, nexthdr);
+
+	/* Skip hop-by-hop options, they are already parsed. */
+	if (nexthdr == NEXTHDR_HOP) {
+		nhoff = sizeof(struct ipv6hdr);
+		nexthdr = skb->h.raw[0];
+		skb->h.raw += (skb->h.raw[1]+1)<<3;
+	}
+
+	rcu_read_lock();
+resubmit:
+	if (!pskb_pull(skb, skb->h.raw - skb->data))
+		goto discard;
+	nexthdr = skb->nh.raw[nhoff];
+
+	raw_sk = sk_head(&raw_v6_htable[nexthdr & (MAX_INET_PROTOS - 1)]);
+	if (raw_sk)
+		ipv6_raw_deliver(skb, nexthdr);
+
+	hash = nexthdr & (MAX_INET_PROTOS - 1);
+	if ((ipprot = rcu_dereference(inet6_protos[hash])) != NULL) {
+		int ret;
+		
+		if (ipprot->flags & INET6_PROTO_FINAL) {
+			struct ipv6hdr *hdr;	
+
+			skb_postpull_rcsum(skb, skb->nh.raw,
+					   skb->h.raw - skb->nh.raw);
+			hdr = skb->nh.ipv6h;
+			if (ipv6_addr_is_multicast(&hdr->daddr) &&
+			    !ipv6_chk_mcast_addr(skb->dev, &hdr->daddr,
+			    &hdr->saddr) &&
+			    !ipv6_is_mld(skb, nexthdr))
+				goto discard;
+		}
+		if (!(ipprot->flags & INET6_PROTO_NOPOLICY) &&
+		    !xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) 
+			goto discard;
+		
+		ret = ipprot->handler(&skb, &nhoff);
+		if (ret > 0)
+			goto resubmit;
+		else if (ret == 0)
+			IP6_INC_STATS_BH(IPSTATS_MIB_INDELIVERS);
+	} else {
+		if (!raw_sk) {
+			if (xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
+				IP6_INC_STATS_BH(IPSTATS_MIB_INUNKNOWNPROTOS);
+				icmpv6_param_prob(skb, ICMPV6_UNK_NEXTHDR, nhoff);
+			}
+		} else {
+			IP6_INC_STATS_BH(IPSTATS_MIB_INDELIVERS);
+			kfree_skb(skb);
+		}
+	}
+	rcu_read_unlock();
+	return 0;
+
+discard:
+	IP6_INC_STATS_BH(IPSTATS_MIB_INDISCARDS);
+	rcu_read_unlock();
+	kfree_skb(skb);
+	return 0;
+}
+
+
+int ip6_input(struct sk_buff *skb)
+{
+	return NF_HOOK(PF_INET6,NF_IP6_LOCAL_IN, skb, skb->dev, NULL, ip6_input_finish);
+}
+
+int ip6_mc_input(struct sk_buff *skb)
+{
+	struct ipv6hdr *hdr;
+	int deliver;
+
+	IP6_INC_STATS_BH(IPSTATS_MIB_INMCASTPKTS);
+
+	hdr = skb->nh.ipv6h;
+	deliver = likely(!(skb->dev->flags & (IFF_PROMISC|IFF_ALLMULTI))) ||
+	    ipv6_chk_mcast_addr(skb->dev, &hdr->daddr, NULL);
+
+	/*
+	 *	IPv6 multicast router mode isnt currently supported.
+	 */
+#if 0
+	if (ipv6_config.multicast_route) {
+		int addr_type;
+
+		addr_type = ipv6_addr_type(&hdr->daddr);
+
+		if (!(addr_type & (IPV6_ADDR_LOOPBACK | IPV6_ADDR_LINKLOCAL))) {
+			struct sk_buff *skb2;
+			struct dst_entry *dst;
+
+			dst = skb->dst;
+			
+			if (deliver) {
+				skb2 = skb_clone(skb, GFP_ATOMIC);
+				dst_output(skb2);
+			} else {
+				dst_output(skb);
+				return 0;
+			}
+		}
+	}
+#endif
+
+	if (likely(deliver)) {
+		ip6_input(skb);
+		return 0;
+	}
+	/* discard */
+	kfree_skb(skb);
+
+	return 0;
+}