2007-10-08 Stefan Siegl <stesie@brokenpipe.de>

	Import a number of files from Linux 2.2.14.  Renamed some of them,
	to have unique filenames as required by the make system.

	* linux-src/net/ipv6/addrconf.c: Import file.
	* linux-src/net/ipv6/af_inet6.c: Likewise.
	* linux-src/net/ipv6/exthdrs.c: Likewise.
	* linux-src/net/ipv6/ip6_fib.c: Likewise.
	* linux-src/net/ipv6/ip6_flowlabel.c: Likewise.
	* linux-src/net/ipv6/ip6_input.c: Likewise.
	* linux-src/net/ipv6/ip6_output.c: Likewise.
	* linux-src/net/ipv6/ipv6_sockglue.c: Likewise.
	* linux-src/net/ipv6/mcast.c: Likewise.
	* linux-src/net/ipv6/ndisc.c: Likewise.
	* linux-src/net/ipv6/reassembly.c: Likewise.
	* linux-src/net/ipv6/tcp_ipv6.c: Likewise.
	* linux-src/net/ipv6/datagram_ipv6.c: Import file (was datagram.c).
	* linux-src/net/ipv6/icmpv6.c: Import file (was icmp.c).
	* linux-src/net/ipv6/protocol_ipv6.c: Import file (was protocol.c).
	* linux-src/net/ipv6/raw_ipv6.c: Import file (was raw.c).
	* linux-src/net/ipv6/route_ipv6.c: Import file (was route.c).
	* linux-src/net/ipv6/udp_ipv6.c: Import file (was udp.c).

1 files changed, 284 insertions, 0 deletions

diff --git a/pfinet/linux-src/net/ipv6/ip6_input.c b/pfinet/linux-src/net/ipv6/ip6_input.c
new file mode 100644
index 00000000..54a3f455
--- /dev/null
+++ b/pfinet/linux-src/net/ipv6/ip6_input.c
@@ -0,0 +1,284 @@
+/*
+ *	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 1.1 2007/10/08 21:12:30 stesie 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.
+ */
+
+#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 <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>
+
+
+int ipv6_rcv(struct sk_buff *skb, struct device *dev, struct packet_type *pt)
+{
+	struct ipv6hdr *hdr;
+	u32 		pkt_len;
+
+	if (skb->pkt_type == PACKET_OTHERHOST)
+		goto drop;
+
+	ipv6_statistics.Ip6InReceives++;
+
+	/* Store incoming device index. When the packet will
+	   be queued, we cannot refer to skb->dev anymore.
+	 */
+	((struct inet6_skb_parm *)skb->cb)->iif = dev->ifindex;
+
+	hdr = skb->nh.ipv6h;
+
+	if (skb->len < sizeof(struct ipv6hdr) || 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;
+		skb_trim(skb, pkt_len + sizeof(struct ipv6hdr));
+	}
+
+	if (hdr->nexthdr == NEXTHDR_HOP) {
+		skb->h.raw = (u8*)(hdr+1);
+		if (!ipv6_parse_hopopts(skb, &hdr->nexthdr)) {
+			ipv6_statistics.Ip6InHdrErrors++;
+			return 0;
+		}
+	}
+
+	if (skb->dst == NULL)
+		ip6_route_input(skb);
+
+	return skb->dst->input(skb);
+
+truncated:
+	ipv6_statistics.Ip6InTruncatedPkts++;
+err:
+	ipv6_statistics.Ip6InHdrErrors++;
+drop:
+	kfree_skb(skb);
+	return 0;
+}
+
+/*
+ *	0 - deliver
+ *	1 - block
+ */
+static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
+{
+	struct icmp6hdr *icmph;
+	struct raw6_opt *opt;
+
+	opt = &sk->tp_pinfo.tp_raw;
+	icmph = (struct icmp6hdr *) (skb->nh.ipv6h + 1);
+	return test_bit(icmph->icmp6_type, &opt->filter);
+}
+
+/*
+ *	demultiplex raw sockets.
+ *	(should consider queueing the skb in the sock receive_queue
+ *	without calling rawv6.c)
+ */
+static struct sock * ipv6_raw_deliver(struct sk_buff *skb,
+				      int nexthdr, unsigned long len)
+{
+	struct in6_addr *saddr;
+	struct in6_addr *daddr;
+	struct sock *sk, *sk2;
+	__u8 hash;
+
+	saddr = &skb->nh.ipv6h->saddr;
+	daddr = saddr + 1;
+
+	hash = nexthdr & (MAX_INET_PROTOS - 1);
+
+	sk = raw_v6_htable[hash];
+
+	/*
+	 *	The first socket found will be delivered after
+	 *	delivery to transport protocols.
+	 */
+
+	if (sk == NULL)
+		return NULL;
+
+	sk = raw_v6_lookup(sk, nexthdr, daddr, saddr);
+
+	if (sk) {
+		sk2 = sk;
+
+		while ((sk2 = raw_v6_lookup(sk2->next, nexthdr, daddr, saddr))) {
+			struct sk_buff *buff;
+
+			if (nexthdr == IPPROTO_ICMPV6 &&
+			    icmpv6_filter(sk2, skb))
+				continue;
+
+			buff = skb_clone(skb, GFP_ATOMIC);
+			if (buff)
+				rawv6_rcv(sk2, buff, len);
+		}
+	}
+
+	if (sk && nexthdr == IPPROTO_ICMPV6 && icmpv6_filter(sk, skb))
+		sk = NULL;
+
+	return sk;
+}
+
+/*
+ *	Deliver the packet to the host
+ */
+
+int ip6_input(struct sk_buff *skb)
+{
+	struct ipv6hdr *hdr = skb->nh.ipv6h;
+	struct inet6_protocol *ipprot;
+	struct sock *raw_sk;
+	__u8 *nhptr;
+	int nexthdr;
+	int found = 0;
+	u8 hash;
+	int len;
+	
+	skb->h.raw = skb->nh.raw + sizeof(struct ipv6hdr);
+
+	/*
+	 *	Parse extension headers
+	 */
+
+	nexthdr = hdr->nexthdr;
+	nhptr = &hdr->nexthdr;
+
+	/* Skip  hop-by-hop options, they are already parsed. */
+	if (nexthdr == NEXTHDR_HOP) {
+		nhptr = (u8*)(hdr+1);
+		nexthdr = *nhptr;
+		skb->h.raw += (nhptr[1]+1)<<3;
+	}
+
+	/* This check is sort of optimization.
+	   It would be stupid to detect for optional headers,
+	   which are missing with probability of 200%
+	 */
+	if (nexthdr != IPPROTO_TCP && nexthdr != IPPROTO_UDP) {
+		nhptr = ipv6_parse_exthdrs(&skb, nhptr);
+		if (nhptr == NULL)
+			return 0;
+		nexthdr = *nhptr;
+		hdr = skb->nh.ipv6h;
+	}
+	len = skb->tail - skb->h.raw;
+
+	raw_sk = ipv6_raw_deliver(skb, nexthdr, len);
+
+	hash = nexthdr & (MAX_INET_PROTOS - 1);
+	for (ipprot = (struct inet6_protocol *) inet6_protos[hash]; 
+	     ipprot != NULL; 
+	     ipprot = (struct inet6_protocol *) ipprot->next) {
+		struct sk_buff *buff = skb;
+
+		if (ipprot->protocol != nexthdr)
+			continue;
+
+		if (ipprot->copy || raw_sk)
+			buff = skb_clone(skb, GFP_ATOMIC);
+		/* buff == NULL ?????? */
+		ipprot->handler(buff, len);
+		found = 1;
+	}
+
+	if (raw_sk) {
+		rawv6_rcv(raw_sk, skb, len);
+		found = 1;
+	}
+
+	/*
+	 *	not found: send ICMP parameter problem back
+	 */
+	if (!found) {
+		ipv6_statistics.Ip6InUnknownProtos++;
+		icmpv6_param_prob(skb, ICMPV6_UNK_NEXTHDR, nhptr);
+	}
+
+	return 0;
+}
+
+int ip6_mc_input(struct sk_buff *skb)
+{
+	struct ipv6hdr *hdr;	
+	int deliver = 0;
+	int discard = 1;
+
+	ipv6_statistics.Ip6InMcastPkts++;
+
+	hdr = skb->nh.ipv6h;
+	if (ipv6_chk_mcast_addr(skb->dev, &hdr->daddr))
+		deliver = 1;
+
+	/*
+	 *	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);
+			} else {
+				discard = 0;
+				skb2 = skb;
+			}
+
+			dst->output(skb2);
+		}
+	}
+#endif
+
+	if (deliver) {
+		discard = 0;
+		ip6_input(skb);
+	}
+
+	if (discard)
+		kfree_skb(skb);
+
+	return 0;
+}