Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-11 14:42:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-2.6

Browse Source
This commit is contained in:
David S. Miller 2009-06-29 19:22:31 -07:00
commit 53bd9728bf
8 changed files with 95 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
include/linux/netfilter/xt_conntrack.h
View File

@ -81,4 +81,17 @@ struct xt_conntrack_mtinfo1 {
__u8 state_mask, status_mask;
};
struct xt_conntrack_mtinfo2 {
union nf_inet_addr origsrc_addr, origsrc_mask;
union nf_inet_addr origdst_addr, origdst_mask;
union nf_inet_addr replsrc_addr, replsrc_mask;
union nf_inet_addr repldst_addr, repldst_mask;
__u32 expires_min, expires_max;
__u16 l4proto;
__be16 origsrc_port, origdst_port;
__be16 replsrc_port, repldst_port;
__u16 match_flags, invert_flags;
__u16 state_mask, status_mask;
};
#endif /*_XT_CONNTRACK_H*/

2
include/linux/netfilter/xt_osf.h
View File

@ -20,6 +20,8 @@
#ifndef _XT_OSF_H
#define _XT_OSF_H
#include <linux/types.h>
#define MAXGENRELEN 32
#define XT_OSF_GENRE (1<<0)

4
include/net/netfilter/nf_conntrack.h
View File

@ -258,8 +258,8 @@ static inline bool nf_ct_kill(struct nf_conn *ct)
/* Update TCP window tracking data when NAT mangles the packet */
extern void nf_conntrack_tcp_update(const struct sk_buff *skb,
unsigned int dataoff,
struct nf_conn *ct,
int dir);
struct nf_conn *ct, int dir,
s16 offset);
/* Fake conntrack entry for untracked connections */
extern struct nf_conn nf_conntrack_untracked;

17
net/ipv4/netfilter/nf_nat_helper.c
View File

@ -191,7 +191,8 @@ nf_nat_mangle_tcp_packet(struct sk_buff *skb,
ct, ctinfo);
/* Tell TCP window tracking about seq change */
nf_conntrack_tcp_update(skb, ip_hdrlen(skb),
ct, CTINFO2DIR(ctinfo));
ct, CTINFO2DIR(ctinfo),
(int)rep_len - (int)match_len);
nf_conntrack_event_cache(IPCT_NATSEQADJ, ct);
}
@ -377,6 +378,7 @@ nf_nat_seq_adjust(struct sk_buff *skb,
struct tcphdr *tcph;
int dir;
__be32 newseq, newack;
s16 seqoff, ackoff;
struct nf_conn_nat *nat = nfct_nat(ct);
struct nf_nat_seq *this_way, *other_way;
@ -390,15 +392,18 @@ nf_nat_seq_adjust(struct sk_buff *skb,
tcph = (void *)skb->data + ip_hdrlen(skb);
if (after(ntohl(tcph->seq), this_way->correction_pos))
newseq = htonl(ntohl(tcph->seq) + this_way->offset_after);
seqoff = this_way->offset_after;
else
newseq = htonl(ntohl(tcph->seq) + this_way->offset_before);
seqoff = this_way->offset_before;
if (after(ntohl(tcph->ack_seq) - other_way->offset_before,
other_way->correction_pos))
newack = htonl(ntohl(tcph->ack_seq) - other_way->offset_after);
ackoff = other_way->offset_after;
else
newack = htonl(ntohl(tcph->ack_seq) - other_way->offset_before);
ackoff = other_way->offset_before;
newseq = htonl(ntohl(tcph->seq) + seqoff);
newack = htonl(ntohl(tcph->ack_seq) - ackoff);
inet_proto_csum_replace4(&tcph->check, skb, tcph->seq, newseq, 0);
inet_proto_csum_replace4(&tcph->check, skb, tcph->ack_seq, newack, 0);
@ -413,7 +418,7 @@ nf_nat_seq_adjust(struct sk_buff *skb,
if (!nf_nat_sack_adjust(skb, tcph, ct, ctinfo))
return 0;
nf_conntrack_tcp_update(skb, ip_hdrlen(skb), ct, dir);
nf_conntrack_tcp_update(skb, ip_hdrlen(skb), ct, dir, seqoff);
return 1;
}

4
net/netfilter/nf_conntrack_expect.c
View File

@ -617,8 +617,10 @@ err1:
void nf_conntrack_expect_fini(struct net *net)
{
exp_proc_remove(net);
if (net_eq(net, &init_net))
if (net_eq(net, &init_net)) {
rcu_barrier(); /* Wait for call_rcu() before destroy */
kmem_cache_destroy(nf_ct_expect_cachep);
}
nf_ct_free_hashtable(net->ct.expect_hash, net->ct.expect_vmalloc,
nf_ct_expect_hsize);
}

2
net/netfilter/nf_conntrack_extend.c
View File

@ -186,6 +186,6 @@ void nf_ct_extend_unregister(struct nf_ct_ext_type *type)
rcu_assign_pointer(nf_ct_ext_types[type->id], NULL);
update_alloc_size(type);
mutex_unlock(&nf_ct_ext_type_mutex);
synchronize_rcu();
rcu_barrier(); /* Wait for completion of call_rcu()'s */
}
EXPORT_SYMBOL_GPL(nf_ct_extend_unregister);

6
net/netfilter/nf_conntrack_proto_tcp.c
View File

@ -720,8 +720,8 @@ static bool tcp_in_window(const struct nf_conn *ct,
/* Caller must linearize skb at tcp header. */
void nf_conntrack_tcp_update(const struct sk_buff *skb,
unsigned int dataoff,
struct nf_conn *ct,
int dir)
struct nf_conn *ct, int dir,
s16 offset)
{
const struct tcphdr *tcph = (const void *)skb->data + dataoff;
const struct ip_ct_tcp_state *sender = &ct->proto.tcp.seen[dir];
@ -734,7 +734,7 @@ void nf_conntrack_tcp_update(const struct sk_buff *skb,
/*
* We have to worry for the ack in the reply packet only...
*/
if (after(end, ct->proto.tcp.seen[dir].td_end))
if (ct->proto.tcp.seen[dir].td_end + offset == end)
ct->proto.tcp.seen[dir].td_end = end;
ct->proto.tcp.last_end = end;
spin_unlock_bh(&ct->lock);

66
net/netfilter/xt_conntrack.c
View File

@ -129,7 +129,7 @@ conntrack_addrcmp(const union nf_inet_addr *kaddr,
static inline bool
conntrack_mt_origsrc(const struct nf_conn *ct,
const struct xt_conntrack_mtinfo1 *info,
const struct xt_conntrack_mtinfo2 *info,
u_int8_t family)
{
return conntrack_addrcmp(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3,
@ -138,7 +138,7 @@ conntrack_mt_origsrc(const struct nf_conn *ct,
static inline bool
conntrack_mt_origdst(const struct nf_conn *ct,
const struct xt_conntrack_mtinfo1 *info,
const struct xt_conntrack_mtinfo2 *info,
u_int8_t family)
{
return conntrack_addrcmp(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u3,
@ -147,7 +147,7 @@ conntrack_mt_origdst(const struct nf_conn *ct,
static inline bool
conntrack_mt_replsrc(const struct nf_conn *ct,
const struct xt_conntrack_mtinfo1 *info,
const struct xt_conntrack_mtinfo2 *info,
u_int8_t family)
{
return conntrack_addrcmp(&ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3,
@ -156,7 +156,7 @@ conntrack_mt_replsrc(const struct nf_conn *ct,
static inline bool
conntrack_mt_repldst(const struct nf_conn *ct,
const struct xt_conntrack_mtinfo1 *info,
const struct xt_conntrack_mtinfo2 *info,
u_int8_t family)
{
return conntrack_addrcmp(&ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3,
@ -164,7 +164,7 @@ conntrack_mt_repldst(const struct nf_conn *ct,
}
static inline bool
ct_proto_port_check(const struct xt_conntrack_mtinfo1 *info,
ct_proto_port_check(const struct xt_conntrack_mtinfo2 *info,
const struct nf_conn *ct)
{
const struct nf_conntrack_tuple *tuple;
@ -204,7 +204,7 @@ ct_proto_port_check(const struct xt_conntrack_mtinfo1 *info,
static bool
conntrack_mt(const struct sk_buff *skb, const struct xt_match_param *par)
{
const struct xt_conntrack_mtinfo1 *info = par->matchinfo;
const struct xt_conntrack_mtinfo2 *info = par->matchinfo;
enum ip_conntrack_info ctinfo;
const struct nf_conn *ct;
unsigned int statebit;
@ -278,6 +278,16 @@ conntrack_mt(const struct sk_buff *skb, const struct xt_match_param *par)
return true;
}
static bool
conntrack_mt_v1(const struct sk_buff *skb, const struct xt_match_param *par)
{
const struct xt_conntrack_mtinfo2 *const *info = par->matchinfo;
struct xt_match_param newpar = *par;
newpar.matchinfo = *info;
return conntrack_mt(skb, &newpar);
}
static bool conntrack_mt_check(const struct xt_mtchk_param *par)
{
if (nf_ct_l3proto_try_module_get(par->family) < 0) {
@ -288,11 +298,45 @@ static bool conntrack_mt_check(const struct xt_mtchk_param *par)
return true;
}
static bool conntrack_mt_check_v1(const struct xt_mtchk_param *par)
{
struct xt_conntrack_mtinfo1 *info = par->matchinfo;
struct xt_conntrack_mtinfo2 *up;
int ret = conntrack_mt_check(par);
if (ret < 0)
return ret;
up = kmalloc(sizeof(*up), GFP_KERNEL);
if (up == NULL) {
nf_ct_l3proto_module_put(par->family);
return -ENOMEM;
}
/*
* The strategy here is to minimize the overhead of v1 matching,
* by prebuilding a v2 struct and putting the pointer into the
* v1 dataspace.
*/
memcpy(up, info, offsetof(typeof(*info), state_mask));
up->state_mask = info->state_mask;
up->status_mask = info->status_mask;
*(void **)info = up;
return true;
}
static void conntrack_mt_destroy(const struct xt_mtdtor_param *par)
{
nf_ct_l3proto_module_put(par->family);
}
static void conntrack_mt_destroy_v1(const struct xt_mtdtor_param *par)
{
struct xt_conntrack_mtinfo2 **info = par->matchinfo;
kfree(*info);
conntrack_mt_destroy(par);
}
#ifdef CONFIG_COMPAT
struct compat_xt_conntrack_info
{
@ -363,6 +407,16 @@ static struct xt_match conntrack_mt_reg[] __read_mostly = {
.revision = 1,
.family = NFPROTO_UNSPEC,
.matchsize = sizeof(struct xt_conntrack_mtinfo1),
.match = conntrack_mt_v1,
.checkentry = conntrack_mt_check_v1,
.destroy = conntrack_mt_destroy_v1,
.me = THIS_MODULE,
},
{
.name = "conntrack",
.revision = 2,
.family = NFPROTO_UNSPEC,
.matchsize = sizeof(struct xt_conntrack_mtinfo2),
.match = conntrack_mt,
.checkentry = conntrack_mt_check,
.destroy = conntrack_mt_destroy,