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netfilter: xtables: remove xt_conntrack v0 

Superseded by xt_conntrack v1 (v2.6.24-2921-g64eb12f).

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
This commit is contained in:
Jan Engelhardt 2009-06-12 18:56:14 +02:00
parent 84899a2b9a
commit 9e05ec4b18
3 changed files with 1 additions and 193 deletions
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3
Documentation/feature-removal-schedule.txt
View File

@ -238,9 +238,6 @@ What (Why):
- "forwarding" header files like ipt_mac.h in
include/linux/netfilter_ipv4/ and include/linux/netfilter_ipv6/
- xt_conntrack match revision 0
(superseded by xt_conntrack match revision 1)
- xt_iprange match revision 0,
include/linux/netfilter_ipv4/ipt_iprange.h
(superseded by xt_iprange match revision 1)

36
include/linux/netfilter/xt_conntrack.h
View File

@ -32,42 +32,6 @@ enum {
XT_CONNTRACK_DIRECTION = 1 << 12,
};
/* This is exposed to userspace, so remains frozen in time. */
struct ip_conntrack_old_tuple
{
struct {
__be32 ip;
union {
__u16 all;
} u;
} src;
struct {
__be32 ip;
union {
__u16 all;
} u;
/* The protocol. */
__u16 protonum;
} dst;
};
struct xt_conntrack_info
{
unsigned int statemask, statusmask;
struct ip_conntrack_old_tuple tuple[IP_CT_DIR_MAX];
struct in_addr sipmsk[IP_CT_DIR_MAX], dipmsk[IP_CT_DIR_MAX];
unsigned long expires_min, expires_max;
/* Flags word */
__u8 flags;
/* Inverse flags */
__u8 invflags;
};
struct xt_conntrack_mtinfo1 {
union nf_inet_addr origsrc_addr, origsrc_mask;
union nf_inet_addr origdst_addr, origdst_mask;

155
net/netfilter/xt_conntrack.c
View File

@ -19,100 +19,11 @@
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
MODULE_AUTHOR("Jan Engelhardt <jengelh@computergmbh.de>");
MODULE_AUTHOR("Jan Engelhardt <jengelh@medozas.de>");
MODULE_DESCRIPTION("Xtables: connection tracking state match");
MODULE_ALIAS("ipt_conntrack");
MODULE_ALIAS("ip6t_conntrack");
static bool
conntrack_mt_v0(const struct sk_buff *skb, const struct xt_match_param *par)
{
const struct xt_conntrack_info *sinfo = par->matchinfo;
const struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
unsigned int statebit;
ct = nf_ct_get(skb, &ctinfo);
#define FWINV(bool, invflg) ((bool) ^ !!(sinfo->invflags & (invflg)))
if (ct == &nf_conntrack_untracked)
statebit = XT_CONNTRACK_STATE_UNTRACKED;
else if (ct)
statebit = XT_CONNTRACK_STATE_BIT(ctinfo);
else
statebit = XT_CONNTRACK_STATE_INVALID;
if (sinfo->flags & XT_CONNTRACK_STATE) {
if (ct) {
if (test_bit(IPS_SRC_NAT_BIT, &ct->status))
statebit |= XT_CONNTRACK_STATE_SNAT;
if (test_bit(IPS_DST_NAT_BIT, &ct->status))
statebit |= XT_CONNTRACK_STATE_DNAT;
}
if (FWINV((statebit & sinfo->statemask) == 0,
XT_CONNTRACK_STATE))
return false;
}
if (ct == NULL) {
if (sinfo->flags & ~XT_CONNTRACK_STATE)
return false;
return true;
}
if (sinfo->flags & XT_CONNTRACK_PROTO &&
FWINV(nf_ct_protonum(ct) !=
sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.protonum,
XT_CONNTRACK_PROTO))
return false;
if (sinfo->flags & XT_CONNTRACK_ORIGSRC &&
FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip &
sinfo->sipmsk[IP_CT_DIR_ORIGINAL].s_addr) !=
sinfo->tuple[IP_CT_DIR_ORIGINAL].src.ip,
XT_CONNTRACK_ORIGSRC))
return false;
if (sinfo->flags & XT_CONNTRACK_ORIGDST &&
FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u3.ip &
sinfo->dipmsk[IP_CT_DIR_ORIGINAL].s_addr) !=
sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.ip,
XT_CONNTRACK_ORIGDST))
return false;
if (sinfo->flags & XT_CONNTRACK_REPLSRC &&
FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip &
sinfo->sipmsk[IP_CT_DIR_REPLY].s_addr) !=
sinfo->tuple[IP_CT_DIR_REPLY].src.ip,
XT_CONNTRACK_REPLSRC))
return false;
if (sinfo->flags & XT_CONNTRACK_REPLDST &&
FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip &
sinfo->dipmsk[IP_CT_DIR_REPLY].s_addr) !=
sinfo->tuple[IP_CT_DIR_REPLY].dst.ip,
XT_CONNTRACK_REPLDST))
return false;
if (sinfo->flags & XT_CONNTRACK_STATUS &&
FWINV((ct->status & sinfo->statusmask) == 0,
XT_CONNTRACK_STATUS))
return false;
if(sinfo->flags & XT_CONNTRACK_EXPIRES) {
unsigned long expires = timer_pending(&ct->timeout) ?
(ct->timeout.expires - jiffies)/HZ : 0;
if (FWINV(!(expires >= sinfo->expires_min &&
expires <= sinfo->expires_max),
XT_CONNTRACK_EXPIRES))
return false;
}
return true;
#undef FWINV
}
static bool
conntrack_addrcmp(const union nf_inet_addr *kaddr,
const union nf_inet_addr *uaddr,
@ -337,71 +248,7 @@ static void conntrack_mt_destroy_v1(const struct xt_mtdtor_param *par)
conntrack_mt_destroy(par);
}
#ifdef CONFIG_COMPAT
struct compat_xt_conntrack_info
{
compat_uint_t statemask;
compat_uint_t statusmask;
struct ip_conntrack_old_tuple tuple[IP_CT_DIR_MAX];
struct in_addr sipmsk[IP_CT_DIR_MAX];
struct in_addr dipmsk[IP_CT_DIR_MAX];
compat_ulong_t expires_min;
compat_ulong_t expires_max;
u_int8_t flags;
u_int8_t invflags;
};
static void conntrack_mt_compat_from_user_v0(void *dst, void *src)
{
const struct compat_xt_conntrack_info *cm = src;
struct xt_conntrack_info m = {
.statemask = cm->statemask,
.statusmask = cm->statusmask,
.expires_min = cm->expires_min,
.expires_max = cm->expires_max,
.flags = cm->flags,
.invflags = cm->invflags,
};
memcpy(m.tuple, cm->tuple, sizeof(m.tuple));
memcpy(m.sipmsk, cm->sipmsk, sizeof(m.sipmsk));
memcpy(m.dipmsk, cm->dipmsk, sizeof(m.dipmsk));
memcpy(dst, &m, sizeof(m));
}
static int conntrack_mt_compat_to_user_v0(void __user *dst, void *src)
{
const struct xt_conntrack_info *m = src;
struct compat_xt_conntrack_info cm = {
.statemask = m->statemask,
.statusmask = m->statusmask,
.expires_min = m->expires_min,
.expires_max = m->expires_max,
.flags = m->flags,
.invflags = m->invflags,
};
memcpy(cm.tuple, m->tuple, sizeof(cm.tuple));
memcpy(cm.sipmsk, m->sipmsk, sizeof(cm.sipmsk));
memcpy(cm.dipmsk, m->dipmsk, sizeof(cm.dipmsk));
return copy_to_user(dst, &cm, sizeof(cm)) ? -EFAULT : 0;
}
#endif
static struct xt_match conntrack_mt_reg[] __read_mostly = {
{
.name = "conntrack",
.revision = 0,
.family = NFPROTO_IPV4,
.match = conntrack_mt_v0,
.checkentry = conntrack_mt_check,
.destroy = conntrack_mt_destroy,
.matchsize = sizeof(struct xt_conntrack_info),
.me = THIS_MODULE,
#ifdef CONFIG_COMPAT
.compatsize = sizeof(struct compat_xt_conntrack_info),
.compat_from_user = conntrack_mt_compat_from_user_v0,
.compat_to_user = conntrack_mt_compat_to_user_v0,
#endif
},
{
.name = "conntrack",
.revision = 1,