root/net/netfilter/nf_conntrack_proto_generic.c

DEFINITIONS

1. generic_pkt_to_tuple
2. generic_invert_tuple
3. generic_print_tuple
4. packet
5. new

/* (C) 1999-2001 Paul `Rusty' Russell
 * (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.
 */

#include <linux/types.h>
#include <linux/jiffies.h>
#include <linux/timer.h>
#include <linux/netfilter.h>
#include <net/netfilter/nf_conntrack_l4proto.h>

static unsigned int nf_ct_generic_timeout __read_mostly = 600*HZ;

static bool generic_pkt_to_tuple(const struct sk_buff *skb,
                                 unsigned int dataoff,
                                 struct nf_conntrack_tuple *tuple)
{
        tuple->src.u.all = 0;
        tuple->dst.u.all = 0;

        return true;
}

static bool generic_invert_tuple(struct nf_conntrack_tuple *tuple,
                                 const struct nf_conntrack_tuple *orig)
{
        tuple->src.u.all = 0;
        tuple->dst.u.all = 0;

        return true;
}

/* Print out the per-protocol part of the tuple. */
static int generic_print_tuple(struct seq_file *s,
                               const struct nf_conntrack_tuple *tuple)
{
        return 0;
}

/* Returns verdict for packet, or -1 for invalid. */
static int packet(struct nf_conn *ct,
                  const struct sk_buff *skb,
                  unsigned int dataoff,
                  enum ip_conntrack_info ctinfo,
                  u_int8_t pf,
                  unsigned int hooknum)
{
        nf_ct_refresh_acct(ct, ctinfo, skb, nf_ct_generic_timeout);
        return NF_ACCEPT;
}

/* Called when a new connection for this protocol found. */
static bool new(struct nf_conn *ct, const struct sk_buff *skb,
                unsigned int dataoff)
{
        return true;
}

#ifdef CONFIG_SYSCTL
static struct ctl_table_header *generic_sysctl_header;
static struct ctl_table generic_sysctl_table[] = {
        {
                .procname       = "nf_conntrack_generic_timeout",
                .data           = &nf_ct_generic_timeout,
                .maxlen         = sizeof(unsigned int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_jiffies,
        },
        {
                .ctl_name       = 0
        }
};
#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
static struct ctl_table generic_compat_sysctl_table[] = {
        {
                .procname       = "ip_conntrack_generic_timeout",
                .data           = &nf_ct_generic_timeout,
                .maxlen         = sizeof(unsigned int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_jiffies,
        },
        {
                .ctl_name       = 0
        }
};
#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
#endif /* CONFIG_SYSCTL */

struct nf_conntrack_l4proto nf_conntrack_l4proto_generic __read_mostly =
{
        .l3proto                = PF_UNSPEC,
        .l4proto                = 0,
        .name                   = "unknown",
        .pkt_to_tuple           = generic_pkt_to_tuple,
        .invert_tuple           = generic_invert_tuple,
        .print_tuple            = generic_print_tuple,
        .packet                 = packet,
        .new                    = new,
#ifdef CONFIG_SYSCTL
        .ctl_table_header       = &generic_sysctl_header,
        .ctl_table              = generic_sysctl_table,
#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
        .ctl_compat_table       = generic_compat_sysctl_table,
#endif
#endif
};