Added missing tegra files.HEADmaster

2 files changed, 1165 insertions, 0 deletions

diff --git a/net/ipv6/netfilter/ip6_queue.c b/net/ipv6/netfilter/ip6_queue.c
new file mode 100644
index 00000000000..e63c3972a73
--- /dev/null
+++ b/net/ipv6/netfilter/ip6_queue.c
@@ -0,0 +1,638 @@
+/*
+ * This is a module which is used for queueing IPv6 packets and
+ * communicating with userspace via netlink.
+ *
+ * (C) 2001 Fernando Anton, this code is GPL.
+ *     IPv64 Project - Work based in IPv64 draft by Arturo Azcorra.
+ *     Universidad Carlos III de Madrid - Leganes (Madrid) - Spain
+ *     Universidad Politecnica de Alcala de Henares - Alcala de H. (Madrid) - Spain
+ *     email: fanton@it.uc3m.es
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/init.h>
+#include <linux/ipv6.h>
+#include <linux/notifier.h>
+#include <linux/netdevice.h>
+#include <linux/netfilter.h>
+#include <linux/netlink.h>
+#include <linux/spinlock.h>
+#include <linux/sysctl.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <net/net_namespace.h>
+#include <net/sock.h>
+#include <net/ipv6.h>
+#include <net/ip6_route.h>
+#include <net/netfilter/nf_queue.h>
+#include <linux/netfilter_ipv4/ip_queue.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
+
+#define IPQ_QMAX_DEFAULT 1024
+#define IPQ_PROC_FS_NAME "ip6_queue"
+#define NET_IPQ_QMAX_NAME "ip6_queue_maxlen"
+
+typedef int (*ipq_cmpfn)(struct nf_queue_entry *, unsigned long);
+
+static unsigned char copy_mode __read_mostly = IPQ_COPY_NONE;
+static unsigned int queue_maxlen __read_mostly = IPQ_QMAX_DEFAULT;
+static DEFINE_SPINLOCK(queue_lock);
+static int peer_pid __read_mostly;
+static unsigned int copy_range __read_mostly;
+static unsigned int queue_total;
+static unsigned int queue_dropped = 0;
+static unsigned int queue_user_dropped = 0;
+static struct sock *ipqnl __read_mostly;
+static LIST_HEAD(queue_list);
+static DEFINE_MUTEX(ipqnl_mutex);
+
+static inline void
+__ipq_enqueue_entry(struct nf_queue_entry *entry)
+{
+       list_add_tail(&entry->list, &queue_list);
+       queue_total++;
+}
+
+static inline int
+__ipq_set_mode(unsigned char mode, unsigned int range)
+{
+        int status = 0;
+
+        switch(mode) {
+        case IPQ_COPY_NONE:
+        case IPQ_COPY_META:
+                copy_mode = mode;
+                copy_range = 0;
+                break;
+
+        case IPQ_COPY_PACKET:
+                if (range > 0xFFFF)
+                        range = 0xFFFF;
+                copy_range = range;
+                copy_mode = mode;
+                break;
+
+        default:
+                status = -EINVAL;
+
+        }
+        return status;
+}
+
+static void __ipq_flush(ipq_cmpfn cmpfn, unsigned long data);
+
+static inline void
+__ipq_reset(void)
+{
+        peer_pid = 0;
+        net_disable_timestamp();
+        __ipq_set_mode(IPQ_COPY_NONE, 0);
+        __ipq_flush(NULL, 0);
+}
+
+static struct nf_queue_entry *
+ipq_find_dequeue_entry(unsigned long id)
+{
+        struct nf_queue_entry *entry = NULL, *i;
+
+        spin_lock_bh(&queue_lock);
+
+        list_for_each_entry(i, &queue_list, list) {
+                if ((unsigned long)i == id) {
+                        entry = i;
+                        break;
+                }
+        }
+
+        if (entry) {
+                list_del(&entry->list);
+                queue_total--;
+        }
+
+        spin_unlock_bh(&queue_lock);
+        return entry;
+}
+
+static void
+__ipq_flush(ipq_cmpfn cmpfn, unsigned long data)
+{
+        struct nf_queue_entry *entry, *next;
+
+        list_for_each_entry_safe(entry, next, &queue_list, list) {
+                if (!cmpfn || cmpfn(entry, data)) {
+                        list_del(&entry->list);
+                        queue_total--;
+                        nf_reinject(entry, NF_DROP);
+                }
+        }
+}
+
+static void
+ipq_flush(ipq_cmpfn cmpfn, unsigned long data)
+{
+        spin_lock_bh(&queue_lock);
+        __ipq_flush(cmpfn, data);
+        spin_unlock_bh(&queue_lock);
+}
+
+static struct sk_buff *
+ipq_build_packet_message(struct nf_queue_entry *entry, int *errp)
+{
+        sk_buff_data_t old_tail;
+        size_t size = 0;
+        size_t data_len = 0;
+        struct sk_buff *skb;
+        struct ipq_packet_msg *pmsg;
+        struct nlmsghdr *nlh;
+        struct timeval tv;
+
+        switch (ACCESS_ONCE(copy_mode)) {
+        case IPQ_COPY_META:
+        case IPQ_COPY_NONE:
+                size = NLMSG_SPACE(sizeof(*pmsg));
+                break;
+
+        case IPQ_COPY_PACKET:
+                if (entry->skb->ip_summed == CHECKSUM_PARTIAL &&
+                    (*errp = skb_checksum_help(entry->skb)))
+                        return NULL;
+
+                data_len = ACCESS_ONCE(copy_range);
+                if (data_len == 0 || data_len > entry->skb->len)
+                        data_len = entry->skb->len;
+
+                size = NLMSG_SPACE(sizeof(*pmsg) + data_len);
+                break;
+
+        default:
+                *errp = -EINVAL;
+                return NULL;
+        }
+
+        skb = alloc_skb(size, GFP_ATOMIC);
+        if (!skb)
+                goto nlmsg_failure;
+
+        old_tail = skb->tail;
+        nlh = NLMSG_PUT(skb, 0, 0, IPQM_PACKET, size - sizeof(*nlh));
+        pmsg = NLMSG_DATA(nlh);
+        memset(pmsg, 0, sizeof(*pmsg));
+
+        pmsg->packet_id       = (unsigned long )entry;
+        pmsg->data_len        = data_len;
+        tv = ktime_to_timeval(entry->skb->tstamp);
+        pmsg->timestamp_sec   = tv.tv_sec;
+        pmsg->timestamp_usec  = tv.tv_usec;
+        pmsg->mark            = entry->skb->mark;
+        pmsg->hook            = entry->hook;
+        pmsg->hw_protocol     = entry->skb->protocol;
+
+        if (entry->indev)
+                strcpy(pmsg->indev_name, entry->indev->name);
+        else
+                pmsg->indev_name[0] = '\0';
+
+        if (entry->outdev)
+                strcpy(pmsg->outdev_name, entry->outdev->name);
+        else
+                pmsg->outdev_name[0] = '\0';
+
+        if (entry->indev && entry->skb->dev &&
+            entry->skb->mac_header != entry->skb->network_header) {
+                pmsg->hw_type = entry->skb->dev->type;
+                pmsg->hw_addrlen = dev_parse_header(entry->skb, pmsg->hw_addr);
+        }
+
+        if (data_len)
+                if (skb_copy_bits(entry->skb, 0, pmsg->payload, data_len))
+                        BUG();
+
+        nlh->nlmsg_len = skb->tail - old_tail;
+        return skb;
+
+nlmsg_failure:
+        kfree_skb(skb);
+        *errp = -EINVAL;
+        printk(KERN_ERR "ip6_queue: error creating packet message\n");
+        return NULL;
+}
+
+static int
+ipq_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum)
+{
+        int status = -EINVAL;
+        struct sk_buff *nskb;
+
+        if (copy_mode == IPQ_COPY_NONE)
+                return -EAGAIN;
+
+        nskb = ipq_build_packet_message(entry, &status);
+        if (nskb == NULL)
+                return status;
+
+        spin_lock_bh(&queue_lock);
+
+        if (!peer_pid)
+                goto err_out_free_nskb;
+
+        if (queue_total >= queue_maxlen) {
+                queue_dropped++;
+                status = -ENOSPC;
+                if (net_ratelimit())
+                        printk (KERN_WARNING "ip6_queue: fill at %d entries, "
+                                "dropping packet(s).  Dropped: %d\n", queue_total,
+                                queue_dropped);
+                goto err_out_free_nskb;
+        }
+
+        /* netlink_unicast will either free the nskb or attach it to a socket */
+        status = netlink_unicast(ipqnl, nskb, peer_pid, MSG_DONTWAIT);
+        if (status < 0) {
+                queue_user_dropped++;
+                goto err_out_unlock;
+        }
+
+        __ipq_enqueue_entry(entry);
+
+        spin_unlock_bh(&queue_lock);
+        return status;
+
+err_out_free_nskb:
+        kfree_skb(nskb);
+
+err_out_unlock:
+        spin_unlock_bh(&queue_lock);
+        return status;
+}
+
+static int
+ipq_mangle_ipv6(ipq_verdict_msg_t *v, struct nf_queue_entry *e)
+{
+        int diff;
+        struct ipv6hdr *user_iph = (struct ipv6hdr *)v->payload;
+        struct sk_buff *nskb;
+
+        if (v->data_len < sizeof(*user_iph))
+                return 0;
+        diff = v->data_len - e->skb->len;
+        if (diff < 0) {
+                if (pskb_trim(e->skb, v->data_len))
+                        return -ENOMEM;
+        } else if (diff > 0) {
+                if (v->data_len > 0xFFFF)
+                        return -EINVAL;
+                if (diff > skb_tailroom(e->skb)) {
+                        nskb = skb_copy_expand(e->skb, skb_headroom(e->skb),
+                                               diff, GFP_ATOMIC);
+                        if (!nskb) {
+                                printk(KERN_WARNING "ip6_queue: OOM "
+                                      "in mangle, dropping packet\n");
+                                return -ENOMEM;
+                        }
+                        kfree_skb(e->skb);
+                        e->skb = nskb;
+                }
+                skb_put(e->skb, diff);
+        }
+        if (!skb_make_writable(e->skb, v->data_len))
+                return -ENOMEM;
+        skb_copy_to_linear_data(e->skb, v->payload, v->data_len);
+        e->skb->ip_summed = CHECKSUM_NONE;
+
+        return 0;
+}
+
+static int
+ipq_set_verdict(struct ipq_verdict_msg *vmsg, unsigned int len)
+{
+        struct nf_queue_entry *entry;
+
+        if (vmsg->value > NF_MAX_VERDICT || vmsg->value == NF_STOLEN)
+                return -EINVAL;
+
+        entry = ipq_find_dequeue_entry(vmsg->id);
+        if (entry == NULL)
+                return -ENOENT;
+        else {
+                int verdict = vmsg->value;
+
+                if (vmsg->data_len && vmsg->data_len == len)
+                        if (ipq_mangle_ipv6(vmsg, entry) < 0)
+                                verdict = NF_DROP;
+
+                nf_reinject(entry, verdict);
+                return 0;
+        }
+}
+
+static int
+ipq_set_mode(unsigned char mode, unsigned int range)
+{
+        int status;
+
+        spin_lock_bh(&queue_lock);
+        status = __ipq_set_mode(mode, range);
+        spin_unlock_bh(&queue_lock);
+        return status;
+}
+
+static int
+ipq_receive_peer(struct ipq_peer_msg *pmsg,
+                 unsigned char type, unsigned int len)
+{
+        int status = 0;
+
+        if (len < sizeof(*pmsg))
+                return -EINVAL;
+
+        switch (type) {
+        case IPQM_MODE:
+                status = ipq_set_mode(pmsg->msg.mode.value,
+                                      pmsg->msg.mode.range);
+                break;
+
+        case IPQM_VERDICT:
+                status = ipq_set_verdict(&pmsg->msg.verdict,
+                                         len - sizeof(*pmsg));
+                break;
+        default:
+                status = -EINVAL;
+        }
+        return status;
+}
+
+static int
+dev_cmp(struct nf_queue_entry *entry, unsigned long ifindex)
+{
+        if (entry->indev)
+                if (entry->indev->ifindex == ifindex)
+                        return 1;
+
+        if (entry->outdev)
+                if (entry->outdev->ifindex == ifindex)
+                        return 1;
+#ifdef CONFIG_BRIDGE_NETFILTER
+        if (entry->skb->nf_bridge) {
+                if (entry->skb->nf_bridge->physindev &&
+                    entry->skb->nf_bridge->physindev->ifindex == ifindex)
+                        return 1;
+                if (entry->skb->nf_bridge->physoutdev &&
+                    entry->skb->nf_bridge->physoutdev->ifindex == ifindex)
+                        return 1;
+        }
+#endif
+        return 0;
+}
+
+static void
+ipq_dev_drop(int ifindex)
+{
+        ipq_flush(dev_cmp, ifindex);
+}
+
+#define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0)
+
+static inline void
+__ipq_rcv_skb(struct sk_buff *skb)
+{
+        int status, type, pid, flags;
+        unsigned int nlmsglen, skblen;
+        struct nlmsghdr *nlh;
+
+        skblen = skb->len;
+        if (skblen < sizeof(*nlh))
+                return;
+
+        nlh = nlmsg_hdr(skb);
+        nlmsglen = nlh->nlmsg_len;
+        if (nlmsglen < sizeof(*nlh) || skblen < nlmsglen)
+                return;
+
+        pid = nlh->nlmsg_pid;
+        flags = nlh->nlmsg_flags;
+
+        if(pid <= 0 || !(flags & NLM_F_REQUEST) || flags & NLM_F_MULTI)
+                RCV_SKB_FAIL(-EINVAL);
+
+        if (flags & MSG_TRUNC)
+                RCV_SKB_FAIL(-ECOMM);
+
+        type = nlh->nlmsg_type;
+        if (type < NLMSG_NOOP || type >= IPQM_MAX)
+                RCV_SKB_FAIL(-EINVAL);
+
+        if (type <= IPQM_BASE)
+                return;
+
+        if (security_netlink_recv(skb, CAP_NET_ADMIN))
+                RCV_SKB_FAIL(-EPERM);
+
+        spin_lock_bh(&queue_lock);
+
+        if (peer_pid) {
+                if (peer_pid != pid) {
+                        spin_unlock_bh(&queue_lock);
+                        RCV_SKB_FAIL(-EBUSY);
+                }
+        } else {
+                net_enable_timestamp();
+                peer_pid = pid;
+        }
+
+        spin_unlock_bh(&queue_lock);
+
+        status = ipq_receive_peer(NLMSG_DATA(nlh), type,
+                                  nlmsglen - NLMSG_LENGTH(0));
+        if (status < 0)
+                RCV_SKB_FAIL(status);
+
+        if (flags & NLM_F_ACK)
+                netlink_ack(skb, nlh, 0);
+}
+
+static void
+ipq_rcv_skb(struct sk_buff *skb)
+{
+        mutex_lock(&ipqnl_mutex);
+        __ipq_rcv_skb(skb);
+        mutex_unlock(&ipqnl_mutex);
+}
+
+static int
+ipq_rcv_dev_event(struct notifier_block *this,
+                  unsigned long event, void *ptr)
+{
+        struct net_device *dev = ptr;
+
+        if (!net_eq(dev_net(dev), &init_net))
+                return NOTIFY_DONE;
+
+        /* Drop any packets associated with the downed device */
+        if (event == NETDEV_DOWN)
+                ipq_dev_drop(dev->ifindex);
+        return NOTIFY_DONE;
+}
+
+static struct notifier_block ipq_dev_notifier = {
+        .notifier_call  = ipq_rcv_dev_event,
+};
+
+static int
+ipq_rcv_nl_event(struct notifier_block *this,
+                 unsigned long event, void *ptr)
+{
+        struct netlink_notify *n = ptr;
+
+        if (event == NETLINK_URELEASE && n->protocol == NETLINK_IP6_FW) {
+                spin_lock_bh(&queue_lock);
+                if ((net_eq(n->net, &init_net)) && (n->pid == peer_pid))
+                        __ipq_reset();
+                spin_unlock_bh(&queue_lock);
+        }
+        return NOTIFY_DONE;
+}
+
+static struct notifier_block ipq_nl_notifier = {
+        .notifier_call  = ipq_rcv_nl_event,
+};
+
+#ifdef CONFIG_SYSCTL
+static struct ctl_table_header *ipq_sysctl_header;
+
+static ctl_table ipq_table[] = {
+        {
+                .procname       = NET_IPQ_QMAX_NAME,
+                .data           = &queue_maxlen,
+                .maxlen         = sizeof(queue_maxlen),
+                .mode           = 0644,
+                .proc_handler   = proc_dointvec
+        },
+        { }
+};
+#endif
+
+#ifdef CONFIG_PROC_FS
+static int ip6_queue_show(struct seq_file *m, void *v)
+{
+        spin_lock_bh(&queue_lock);
+
+        seq_printf(m,
+                      "Peer PID          : %d\n"
+                      "Copy mode         : %hu\n"
+                      "Copy range        : %u\n"
+                      "Queue length      : %u\n"
+                      "Queue max. length : %u\n"
+                      "Queue dropped     : %u\n"
+                      "Netfilter dropped : %u\n",
+                      peer_pid,
+                      copy_mode,
+                      copy_range,
+                      queue_total,
+                      queue_maxlen,
+                      queue_dropped,
+                      queue_user_dropped);
+
+        spin_unlock_bh(&queue_lock);
+        return 0;
+}
+
+static int ip6_queue_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, ip6_queue_show, NULL);
+}
+
+static const struct file_operations ip6_queue_proc_fops = {
+        .open           = ip6_queue_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .owner          = THIS_MODULE,
+};
+#endif
+
+static const struct nf_queue_handler nfqh = {
+        .name   = "ip6_queue",
+        .outfn  = &ipq_enqueue_packet,
+};
+
+static int __init ip6_queue_init(void)
+{
+        int status = -ENOMEM;
+        struct proc_dir_entry *proc __maybe_unused;
+
+        netlink_register_notifier(&ipq_nl_notifier);
+        ipqnl = netlink_kernel_create(&init_net, NETLINK_IP6_FW, 0,
+                                      ipq_rcv_skb, NULL, THIS_MODULE);
+        if (ipqnl == NULL) {
+                printk(KERN_ERR "ip6_queue: failed to create netlink socket\n");
+                goto cleanup_netlink_notifier;
+        }
+
+#ifdef CONFIG_PROC_FS
+        proc = proc_create(IPQ_PROC_FS_NAME, 0, init_net.proc_net,
+                           &ip6_queue_proc_fops);
+        if (!proc) {
+                printk(KERN_ERR "ip6_queue: failed to create proc entry\n");
+                goto cleanup_ipqnl;
+        }
+#endif
+        register_netdevice_notifier(&ipq_dev_notifier);
+#ifdef CONFIG_SYSCTL
+        ipq_sysctl_header = register_sysctl_paths(net_ipv6_ctl_path, ipq_table);
+#endif
+        status = nf_register_queue_handler(NFPROTO_IPV6, &nfqh);
+        if (status < 0) {
+                printk(KERN_ERR "ip6_queue: failed to register queue handler\n");
+                goto cleanup_sysctl;
+        }
+        return status;
+
+cleanup_sysctl:
+#ifdef CONFIG_SYSCTL
+        unregister_sysctl_table(ipq_sysctl_header);
+#endif
+        unregister_netdevice_notifier(&ipq_dev_notifier);
+        proc_net_remove(&init_net, IPQ_PROC_FS_NAME);
+
+cleanup_ipqnl: __maybe_unused
+        netlink_kernel_release(ipqnl);
+        mutex_lock(&ipqnl_mutex);
+        mutex_unlock(&ipqnl_mutex);
+
+cleanup_netlink_notifier:
+        netlink_unregister_notifier(&ipq_nl_notifier);
+        return status;
+}
+
+static void __exit ip6_queue_fini(void)
+{
+        nf_unregister_queue_handlers(&nfqh);
+
+        ipq_flush(NULL, 0);
+
+#ifdef CONFIG_SYSCTL
+        unregister_sysctl_table(ipq_sysctl_header);
+#endif
+        unregister_netdevice_notifier(&ipq_dev_notifier);
+        proc_net_remove(&init_net, IPQ_PROC_FS_NAME);
+
+        netlink_kernel_release(ipqnl);
+        mutex_lock(&ipqnl_mutex);
+        mutex_unlock(&ipqnl_mutex);
+
+        netlink_unregister_notifier(&ipq_nl_notifier);
+}
+
+MODULE_DESCRIPTION("IPv6 packet queue handler");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_IP6_FW);
+
+module_init(ip6_queue_init);
+module_exit(ip6_queue_fini);
diff --git a/net/ipv6/netfilter/ip6t_LOG.c b/net/ipv6/netfilter/ip6t_LOG.c
new file mode 100644
index 00000000000..e6af8d72f26
--- /dev/null
+++ b/net/ipv6/netfilter/ip6t_LOG.c
@@ -0,0 +1,527 @@
+/*
+ * This is a module which is used for logging packets.
+ */
+
+/* (C) 2001 Jan Rekorajski <baggins@pld.org.pl>
+ * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/if_arp.h>
+#include <linux/ip.h>
+#include <linux/spinlock.h>
+#include <linux/icmpv6.h>
+#include <net/udp.h>
+#include <net/tcp.h>
+#include <net/ipv6.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
+#include <net/netfilter/nf_log.h>
+#include <net/netfilter/xt_log.h>
+
+MODULE_AUTHOR("Jan Rekorajski <baggins@pld.org.pl>");
+MODULE_DESCRIPTION("Xtables: IPv6 packet logging to syslog");
+MODULE_LICENSE("GPL");
+
+struct in_device;
+#include <net/route.h>
+#include <linux/netfilter_ipv6/ip6t_LOG.h>
+
+/* One level of recursion won't kill us */
+static void dump_packet(struct sbuff *m,
+                        const struct nf_loginfo *info,
+                        const struct sk_buff *skb, unsigned int ip6hoff,
+                        int recurse)
+{
+        u_int8_t currenthdr;
+        int fragment;
+        struct ipv6hdr _ip6h;
+        const struct ipv6hdr *ih;
+        unsigned int ptr;
+        unsigned int hdrlen = 0;
+        unsigned int logflags;
+
+        if (info->type == NF_LOG_TYPE_LOG)
+                logflags = info->u.log.logflags;
+        else
+                logflags = NF_LOG_MASK;
+
+        ih = skb_header_pointer(skb, ip6hoff, sizeof(_ip6h), &_ip6h);
+        if (ih == NULL) {
+                sb_add(m, "TRUNCATED");
+                return;
+        }
+
+        /* Max length: 88 "SRC=0000.0000.0000.0000.0000.0000.0000.0000 DST=0000.0000.0000.0000.0000.0000.0000.0000 " */
+        sb_add(m, "SRC=%pI6 DST=%pI6 ", &ih->saddr, &ih->daddr);
+
+        /* Max length: 44 "LEN=65535 TC=255 HOPLIMIT=255 FLOWLBL=FFFFF " */
+        sb_add(m, "LEN=%Zu TC=%u HOPLIMIT=%u FLOWLBL=%u ",
+               ntohs(ih->payload_len) + sizeof(struct ipv6hdr),
+               (ntohl(*(__be32 *)ih) & 0x0ff00000) >> 20,
+               ih->hop_limit,
+               (ntohl(*(__be32 *)ih) & 0x000fffff));
+
+        fragment = 0;
+        ptr = ip6hoff + sizeof(struct ipv6hdr);
+        currenthdr = ih->nexthdr;
+        while (currenthdr != NEXTHDR_NONE && ip6t_ext_hdr(currenthdr)) {
+                struct ipv6_opt_hdr _hdr;
+                const struct ipv6_opt_hdr *hp;
+
+                hp = skb_header_pointer(skb, ptr, sizeof(_hdr), &_hdr);
+                if (hp == NULL) {
+                        sb_add(m, "TRUNCATED");
+                        return;
+                }
+
+                /* Max length: 48 "OPT (...) " */
+                if (logflags & IP6T_LOG_IPOPT)
+                        sb_add(m, "OPT ( ");
+
+                switch (currenthdr) {
+                case IPPROTO_FRAGMENT: {
+                        struct frag_hdr _fhdr;
+                        const struct frag_hdr *fh;
+
+                        sb_add(m, "FRAG:");
+                        fh = skb_header_pointer(skb, ptr, sizeof(_fhdr),
+                                                &_fhdr);
+                        if (fh == NULL) {
+                                sb_add(m, "TRUNCATED ");
+                                return;
+                        }
+
+                        /* Max length: 6 "65535 " */
+                        sb_add(m, "%u ", ntohs(fh->frag_off) & 0xFFF8);
+
+                        /* Max length: 11 "INCOMPLETE " */
+                        if (fh->frag_off & htons(0x0001))
+                                sb_add(m, "INCOMPLETE ");
+
+                        sb_add(m, "ID:%08x ", ntohl(fh->identification));
+
+                        if (ntohs(fh->frag_off) & 0xFFF8)
+                                fragment = 1;
+
+                        hdrlen = 8;
+
+                        break;
+                }
+                case IPPROTO_DSTOPTS:
+                case IPPROTO_ROUTING:
+                case IPPROTO_HOPOPTS:
+                        if (fragment) {
+                                if (logflags & IP6T_LOG_IPOPT)
+                                        sb_add(m, ")");
+                                return;
+                        }
+                        hdrlen = ipv6_optlen(hp);
+                        break;
+                /* Max Length */
+                case IPPROTO_AH:
+                        if (logflags & IP6T_LOG_IPOPT) {
+                                struct ip_auth_hdr _ahdr;
+                                const struct ip_auth_hdr *ah;
+
+                                /* Max length: 3 "AH " */
+                                sb_add(m, "AH ");
+
+                                if (fragment) {
+                                        sb_add(m, ")");
+                                        return;
+                                }
+
+                                ah = skb_header_pointer(skb, ptr, sizeof(_ahdr),
+                                                        &_ahdr);
+                                if (ah == NULL) {
+                                        /*
+                                         * Max length: 26 "INCOMPLETE [65535
+                                         *  bytes] )"
+                                         */
+                                        sb_add(m, "INCOMPLETE [%u bytes] )",
+                                               skb->len - ptr);
+                                        return;
+                                }
+
+                                /* Length: 15 "SPI=0xF1234567 */
+                                sb_add(m, "SPI=0x%x ", ntohl(ah->spi));
+
+                        }
+
+                        hdrlen = (hp->hdrlen+2)<<2;
+                        break;
+                case IPPROTO_ESP:
+                        if (logflags & IP6T_LOG_IPOPT) {
+                                struct ip_esp_hdr _esph;
+                                const struct ip_esp_hdr *eh;
+
+                                /* Max length: 4 "ESP " */
+                                sb_add(m, "ESP ");
+
+                                if (fragment) {
+                                        sb_add(m, ")");
+                                        return;
+                                }
+
+                                /*
+                                 * Max length: 26 "INCOMPLETE [65535 bytes] )"
+                                 */
+                                eh = skb_header_pointer(skb, ptr, sizeof(_esph),
+                                                        &_esph);
+                                if (eh == NULL) {
+                                        sb_add(m, "INCOMPLETE [%u bytes] )",
+                                               skb->len - ptr);
+                                        return;
+                                }
+
+                                /* Length: 16 "SPI=0xF1234567 )" */
+                                sb_add(m, "SPI=0x%x )", ntohl(eh->spi) );
+
+                        }
+                        return;
+                default:
+                        /* Max length: 20 "Unknown Ext Hdr 255" */
+                        sb_add(m, "Unknown Ext Hdr %u", currenthdr);
+                        return;
+                }
+                if (logflags & IP6T_LOG_IPOPT)
+                        sb_add(m, ") ");
+
+                currenthdr = hp->nexthdr;
+                ptr += hdrlen;
+        }
+
+        switch (currenthdr) {
+        case IPPROTO_TCP: {
+                struct tcphdr _tcph;
+                const struct tcphdr *th;
+
+                /* Max length: 10 "PROTO=TCP " */
+                sb_add(m, "PROTO=TCP ");
+
+                if (fragment)
+                        break;
+
+                /* Max length: 25 "INCOMPLETE [65535 bytes] " */
+                th = skb_header_pointer(skb, ptr, sizeof(_tcph), &_tcph);
+                if (th == NULL) {
+                        sb_add(m, "INCOMPLETE [%u bytes] ", skb->len - ptr);
+                        return;
+                }
+
+                /* Max length: 20 "SPT=65535 DPT=65535 " */
+                sb_add(m, "SPT=%u DPT=%u ",
+                       ntohs(th->source), ntohs(th->dest));
+                /* Max length: 30 "SEQ=4294967295 ACK=4294967295 " */
+                if (logflags & IP6T_LOG_TCPSEQ)
+                        sb_add(m, "SEQ=%u ACK=%u ",
+                               ntohl(th->seq), ntohl(th->ack_seq));
+                /* Max length: 13 "WINDOW=65535 " */
+                sb_add(m, "WINDOW=%u ", ntohs(th->window));
+                /* Max length: 9 "RES=0x3C " */
+                sb_add(m, "RES=0x%02x ", (u_int8_t)(ntohl(tcp_flag_word(th) & TCP_RESERVED_BITS) >> 22));
+                /* Max length: 32 "CWR ECE URG ACK PSH RST SYN FIN " */
+                if (th->cwr)
+                        sb_add(m, "CWR ");
+                if (th->ece)
+                        sb_add(m, "ECE ");
+                if (th->urg)
+                        sb_add(m, "URG ");
+                if (th->ack)
+                        sb_add(m, "ACK ");
+                if (th->psh)
+                        sb_add(m, "PSH ");
+                if (th->rst)
+                        sb_add(m, "RST ");
+                if (th->syn)
+                        sb_add(m, "SYN ");
+                if (th->fin)
+                        sb_add(m, "FIN ");
+                /* Max length: 11 "URGP=65535 " */
+                sb_add(m, "URGP=%u ", ntohs(th->urg_ptr));
+
+                if ((logflags & IP6T_LOG_TCPOPT) &&
+                    th->doff * 4 > sizeof(struct tcphdr)) {
+                        u_int8_t _opt[60 - sizeof(struct tcphdr)];
+                        const u_int8_t *op;
+                        unsigned int i;
+                        unsigned int optsize = th->doff * 4
+                                               - sizeof(struct tcphdr);
+
+                        op = skb_header_pointer(skb,
+                                                ptr + sizeof(struct tcphdr),
+                                                optsize, _opt);
+                        if (op == NULL) {
+                                sb_add(m, "OPT (TRUNCATED)");
+                                return;
+                        }
+
+                        /* Max length: 127 "OPT (" 15*4*2chars ") " */
+                        sb_add(m, "OPT (");
+                        for (i =0; i < optsize; i++)
+                                sb_add(m, "%02X", op[i]);
+                        sb_add(m, ") ");
+                }
+                break;
+        }
+        case IPPROTO_UDP:
+        case IPPROTO_UDPLITE: {
+                struct udphdr _udph;
+                const struct udphdr *uh;
+
+                if (currenthdr == IPPROTO_UDP)
+                        /* Max length: 10 "PROTO=UDP "     */
+                        sb_add(m, "PROTO=UDP " );
+                else    /* Max length: 14 "PROTO=UDPLITE " */
+                        sb_add(m, "PROTO=UDPLITE ");
+
+                if (fragment)
+                        break;
+
+                /* Max length: 25 "INCOMPLETE [65535 bytes] " */
+                uh = skb_header_pointer(skb, ptr, sizeof(_udph), &_udph);
+                if (uh == NULL) {
+                        sb_add(m, "INCOMPLETE [%u bytes] ", skb->len - ptr);
+                        return;
+                }
+
+                /* Max length: 20 "SPT=65535 DPT=65535 " */
+                sb_add(m, "SPT=%u DPT=%u LEN=%u ",
+                       ntohs(uh->source), ntohs(uh->dest),
+                       ntohs(uh->len));
+                break;
+        }
+        case IPPROTO_ICMPV6: {
+                struct icmp6hdr _icmp6h;
+                const struct icmp6hdr *ic;
+
+                /* Max length: 13 "PROTO=ICMPv6 " */
+                sb_add(m, "PROTO=ICMPv6 ");
+
+                if (fragment)
+                        break;
+
+                /* Max length: 25 "INCOMPLETE [65535 bytes] " */
+                ic = skb_header_pointer(skb, ptr, sizeof(_icmp6h), &_icmp6h);
+                if (ic == NULL) {
+                        sb_add(m, "INCOMPLETE [%u bytes] ", skb->len - ptr);
+                        return;
+                }
+
+                /* Max length: 18 "TYPE=255 CODE=255 " */
+                sb_add(m, "TYPE=%u CODE=%u ", ic->icmp6_type, ic->icmp6_code);
+
+                switch (ic->icmp6_type) {
+                case ICMPV6_ECHO_REQUEST:
+                case ICMPV6_ECHO_REPLY:
+                        /* Max length: 19 "ID=65535 SEQ=65535 " */
+                        sb_add(m, "ID=%u SEQ=%u ",
+                                ntohs(ic->icmp6_identifier),
+                                ntohs(ic->icmp6_sequence));
+                        break;
+                case ICMPV6_MGM_QUERY:
+                case ICMPV6_MGM_REPORT:
+                case ICMPV6_MGM_REDUCTION:
+                        break;
+
+                case ICMPV6_PARAMPROB:
+                        /* Max length: 17 "POINTER=ffffffff " */
+                        sb_add(m, "POINTER=%08x ", ntohl(ic->icmp6_pointer));
+                        /* Fall through */
+                case ICMPV6_DEST_UNREACH:
+                case ICMPV6_PKT_TOOBIG:
+                case ICMPV6_TIME_EXCEED:
+                        /* Max length: 3+maxlen */
+                        if (recurse) {
+                                sb_add(m, "[");
+                                dump_packet(m, info, skb,
+                                            ptr + sizeof(_icmp6h), 0);
+                                sb_add(m, "] ");
+                        }
+
+                        /* Max length: 10 "MTU=65535 " */
+                        if (ic->icmp6_type == ICMPV6_PKT_TOOBIG)
+                                sb_add(m, "MTU=%u ", ntohl(ic->icmp6_mtu));
+                }
+                break;
+        }
+        /* Max length: 10 "PROTO=255 " */
+        default:
+                sb_add(m, "PROTO=%u ", currenthdr);
+        }
+
+        /* Max length: 15 "UID=4294967295 " */
+        if ((logflags & IP6T_LOG_UID) && recurse && skb->sk) {
+                read_lock_bh(&skb->sk->sk_callback_lock);
+                if (skb->sk->sk_socket && skb->sk->sk_socket->file)
+                        sb_add(m, "UID=%u GID=%u ",
+                                skb->sk->sk_socket->file->f_cred->fsuid,
+                                skb->sk->sk_socket->file->f_cred->fsgid);
+                read_unlock_bh(&skb->sk->sk_callback_lock);
+        }
+
+        /* Max length: 16 "MARK=0xFFFFFFFF " */
+        if (!recurse && skb->mark)
+                sb_add(m, "MARK=0x%x ", skb->mark);
+}
+
+static void dump_mac_header(struct sbuff *m,
+                            const struct nf_loginfo *info,
+                            const struct sk_buff *skb)
+{
+        struct net_device *dev = skb->dev;
+        unsigned int logflags = 0;
+
+        if (info->type == NF_LOG_TYPE_LOG)
+                logflags = info->u.log.logflags;
+
+        if (!(logflags & IP6T_LOG_MACDECODE))
+                goto fallback;
+
+        switch (dev->type) {
+        case ARPHRD_ETHER:
+                sb_add(m, "MACSRC=%pM MACDST=%pM MACPROTO=%04x ",
+                       eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
+                       ntohs(eth_hdr(skb)->h_proto));
+                return;
+        default:
+                break;
+        }
+
+fallback:
+        sb_add(m, "MAC=");
+        if (dev->hard_header_len &&
+            skb->mac_header != skb->network_header) {
+                const unsigned char *p = skb_mac_header(skb);
+                unsigned int len = dev->hard_header_len;
+                unsigned int i;
+
+                if (dev->type == ARPHRD_SIT &&
+                    (p -= ETH_HLEN) < skb->head)
+                        p = NULL;
+
+                if (p != NULL) {
+                        sb_add(m, "%02x", *p++);
+                        for (i = 1; i < len; i++)
+                                sb_add(m, ":%02x", *p++);
+                }
+                sb_add(m, " ");
+
+                if (dev->type == ARPHRD_SIT) {
+                        const struct iphdr *iph =
+                                (struct iphdr *)skb_mac_header(skb);
+                        sb_add(m, "TUNNEL=%pI4->%pI4 ", &iph->saddr, &iph->daddr);
+                }
+        } else
+                sb_add(m, " ");
+}
+
+static struct nf_loginfo default_loginfo = {
+        .type   = NF_LOG_TYPE_LOG,
+        .u = {
+                .log = {
+                        .level    = 5,
+                        .logflags = NF_LOG_MASK,
+                },
+        },
+};
+
+static void
+ip6t_log_packet(u_int8_t pf,
+                unsigned int hooknum,
+                const struct sk_buff *skb,
+                const struct net_device *in,
+                const struct net_device *out,
+                const struct nf_loginfo *loginfo,
+                const char *prefix)
+{
+        struct sbuff *m = sb_open();
+
+        if (!loginfo)
+                loginfo = &default_loginfo;
+
+        sb_add(m, "<%d>%sIN=%s OUT=%s ", loginfo->u.log.level,
+               prefix,
+               in ? in->name : "",
+               out ? out->name : "");
+
+        if (in != NULL)
+                dump_mac_header(m, loginfo, skb);
+
+        dump_packet(m, loginfo, skb, skb_network_offset(skb), 1);
+
+        sb_close(m);
+}
+
+static unsigned int
+log_tg6(struct sk_buff *skb, const struct xt_action_param *par)
+{
+        const struct ip6t_log_info *loginfo = par->targinfo;
+        struct nf_loginfo li;
+
+        li.type = NF_LOG_TYPE_LOG;
+        li.u.log.level = loginfo->level;
+        li.u.log.logflags = loginfo->logflags;
+
+        ip6t_log_packet(NFPROTO_IPV6, par->hooknum, skb, par->in, par->out,
+                        &li, loginfo->prefix);
+        return XT_CONTINUE;
+}
+
+
+static int log_tg6_check(const struct xt_tgchk_param *par)
+{
+        const struct ip6t_log_info *loginfo = par->targinfo;
+
+        if (loginfo->level >= 8) {
+                pr_debug("level %u >= 8\n", loginfo->level);
+                return -EINVAL;
+        }
+        if (loginfo->prefix[sizeof(loginfo->prefix)-1] != '\0') {
+                pr_debug("prefix not null-terminated\n");
+                return -EINVAL;
+        }
+        return 0;
+}
+
+static struct xt_target log_tg6_reg __read_mostly = {
+        .name           = "LOG",
+        .family         = NFPROTO_IPV6,
+        .target         = log_tg6,
+        .targetsize     = sizeof(struct ip6t_log_info),
+        .checkentry     = log_tg6_check,
+        .me             = THIS_MODULE,
+};
+
+static struct nf_logger ip6t_logger __read_mostly = {
+        .name           = "ip6t_LOG",
+        .logfn          = &ip6t_log_packet,
+        .me             = THIS_MODULE,
+};
+
+static int __init log_tg6_init(void)
+{
+        int ret;
+
+        ret = xt_register_target(&log_tg6_reg);
+        if (ret < 0)
+                return ret;
+        nf_log_register(NFPROTO_IPV6, &ip6t_logger);
+        return 0;
+}
+
+static void __exit log_tg6_exit(void)
+{
+        nf_log_unregister(&ip6t_logger);
+        xt_unregister_target(&log_tg6_reg);
+}
+
+module_init(log_tg6_init);
+module_exit(log_tg6_exit);