* (C) 2003 by Patrick Mchardy <kaber@trash.net>
* (C) 2005-2006 by Pablo Neira Ayuso <pablo@eurodev.net>
*
- * I've reworked this stuff to use attributes instead of conntrack
- * structures. 5.44 am. I need more tea. --pablo 05/07/11.
- *
- * Initial connection tracking via netlink development funded and
+ * Initial connection tracking via netlink development funded and
* generally made possible by Network Robots, Inc. (www.networkrobots.com)
*
* Further development of this code funded by Astaro AG (http://www.astaro.com)
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
- *
- * Derived from ip_conntrack_netlink.c: Port by Pablo Neira Ayuso (05/11/14)
*/
#include <linux/init.h>
#include <linux/notifier.h>
#include <linux/netfilter.h>
+#include <net/netlink.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_expect.h>
static char __initdata version[] = "0.93";
static inline int
-ctnetlink_dump_tuples_proto(struct sk_buff *skb,
+ctnetlink_dump_tuples_proto(struct sk_buff *skb,
const struct nf_conntrack_tuple *tuple,
struct nf_conntrack_l4proto *l4proto)
{
if (likely(l4proto->tuple_to_nfattr))
ret = l4proto->tuple_to_nfattr(skb, tuple);
-
+
NFA_NEST_END(skb, nest_parms);
return ret;
timeout = 0;
else
timeout = htonl(timeout_l / HZ);
-
+
NFA_PUT(skb, CTA_TIMEOUT, sizeof(timeout), &timeout);
return 0;
nf_ct_l4proto_put(l4proto);
return 0;
}
-
+
nest_proto = NFA_NEST(skb, CTA_PROTOINFO);
ret = l4proto->to_nfattr(skb, nest_proto, ct);
if (!help || !help->helper)
return 0;
-
+
nest_helper = NFA_NEST(skb, CTA_HELP);
NFA_PUT(skb, CTA_HELP_NAME, strlen(help->helper->name), help->helper->name);
ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct)
{
__be32 use = htonl(atomic_read(&ct->ct_general.use));
-
+
NFA_PUT(skb, CTA_USE, sizeof(u_int32_t), &use);
return 0;
static int
ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
- int event, int nowait,
+ int event, int nowait,
const struct nf_conn *ct)
{
struct nlmsghdr *nlh;
struct nfgenmsg *nfmsg;
struct nfattr *nest_parms;
- unsigned char *b;
-
- b = skb->tail;
+ unsigned char *b = skb_tail_pointer(skb);
event |= NFNL_SUBSYS_CTNETLINK << 8;
nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg));
nfmsg = NLMSG_DATA(nlh);
nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0;
- nfmsg->nfgen_family =
+ nfmsg->nfgen_family =
ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
nfmsg->version = NFNETLINK_V0;
nfmsg->res_id = 0;
if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
goto nfattr_failure;
NFA_NEST_END(skb, nest_parms);
-
+
nest_parms = NFA_NEST(skb, CTA_TUPLE_REPLY);
if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0)
goto nfattr_failure;
ctnetlink_dump_use(skb, ct) < 0)
goto nfattr_failure;
- nlh->nlmsg_len = skb->tail - b;
+ nlh->nlmsg_len = skb_tail_pointer(skb) - b;
return skb->len;
nlmsg_failure:
nfattr_failure:
- skb_trim(skb, b - skb->data);
+ nlmsg_trim(skb, b);
return -1;
}
#ifdef CONFIG_NF_CONNTRACK_EVENTS
static int ctnetlink_conntrack_event(struct notifier_block *this,
- unsigned long events, void *ptr)
+ unsigned long events, void *ptr)
{
struct nlmsghdr *nlh;
struct nfgenmsg *nfmsg;
struct nf_conn *ct = (struct nf_conn *)ptr;
struct sk_buff *skb;
unsigned int type;
- unsigned char *b;
+ sk_buff_data_t b;
unsigned int flags = 0, group;
/* ignore our fake conntrack entry */
if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
goto nfattr_failure;
NFA_NEST_END(skb, nest_parms);
-
+
nest_parms = NFA_NEST(skb, CTA_TUPLE_REPLY);
if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0)
goto nfattr_failure;
if (events & IPCT_PROTOINFO
&& ctnetlink_dump_protoinfo(skb, ct) < 0)
- goto nfattr_failure;
+ goto nfattr_failure;
if ((events & IPCT_HELPER || nfct_help(ct))
&& ctnetlink_dump_helpinfo(skb, ct) < 0)
- goto nfattr_failure;
+ goto nfattr_failure;
#ifdef CONFIG_NF_CONNTRACK_MARK
if ((events & IPCT_MARK || ct->mark)
&& ctnetlink_dump_mark(skb, ct) < 0)
- goto nfattr_failure;
+ goto nfattr_failure;
#endif
if (events & IPCT_COUNTER_FILLING &&
cb->args[1] = 0;
}
if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid,
- cb->nlh->nlmsg_seq,
+ cb->nlh->nlmsg_seq,
IPCTNL_MSG_CT_NEW,
1, ct) < 0) {
nf_conntrack_get(&ct->ct_general);
};
static inline int
-ctnetlink_parse_tuple_proto(struct nfattr *attr,
+ctnetlink_parse_tuple_proto(struct nfattr *attr,
struct nf_conntrack_tuple *tuple)
{
struct nfattr *tb[CTA_PROTO_MAX];
ret = l4proto->nfattr_to_tuple(tb, tuple);
nf_ct_l4proto_put(l4proto);
-
+
return ret;
}
int err;
memset(range, 0, sizeof(*range));
-
+
nfattr_parse_nested(tb, CTA_NAT_MAX, nat);
if (nfattr_bad_size(tb, CTA_NAT_MAX, cta_min_nat))
};
static int
-ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
- struct nlmsghdr *nlh, struct nfattr *cda[], int *errp)
+ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct nfattr *cda[])
{
struct nf_conntrack_tuple_hash *h;
struct nf_conntrack_tuple tuple;
return -ENOENT;
ct = nf_ct_tuplehash_to_ctrack(h);
-
+
if (cda[CTA_ID-1]) {
u_int32_t id = ntohl(*(__be32 *)NFA_DATA(cda[CTA_ID-1]));
if (ct->id != id) {
nf_ct_put(ct);
return -ENOENT;
}
- }
+ }
if (del_timer(&ct->timeout))
ct->timeout.function((unsigned long)ct);
}
static int
-ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
- struct nlmsghdr *nlh, struct nfattr *cda[], int *errp)
+ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct nfattr *cda[])
{
struct nf_conntrack_tuple_hash *h;
struct nf_conntrack_tuple tuple;
int err = 0;
if (nlh->nlmsg_flags & NLM_F_DUMP) {
- u32 rlen;
-
#ifndef CONFIG_NF_CT_ACCT
if (NFNL_MSG_TYPE(nlh->nlmsg_type) == IPCTNL_MSG_CT_GET_CTRZERO)
return -ENOTSUPP;
#endif
- if ((*errp = netlink_dump_start(ctnl, skb, nlh,
- ctnetlink_dump_table,
- ctnetlink_done)) != 0)
- return -EINVAL;
-
- rlen = NLMSG_ALIGN(nlh->nlmsg_len);
- if (rlen > skb->len)
- rlen = skb->len;
- skb_pull(skb, rlen);
- return 0;
+ return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table,
+ ctnetlink_done);
}
if (nfattr_bad_size(cda, CTA_MAX, cta_min))
return -ENOMEM;
}
- err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq,
+ err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq,
IPCTNL_MSG_CT_NEW, 1, ct);
nf_ct_put(ct);
if (err <= 0)
if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING))
/* unchangeable */
return -EINVAL;
-
+
if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
/* SEEN_REPLY bit can only be set */
return -EINVAL;
-
+
if (d & IPS_ASSURED && !(status & IPS_ASSURED))
/* ASSURED bit can only be set */
return -EINVAL;
memset(&help->help, 0, sizeof(help->help));
}
}
-
+
help->helper = helper;
return 0;
ctnetlink_change_timeout(struct nf_conn *ct, struct nfattr *cda[])
{
u_int32_t timeout = ntohl(*(__be32 *)NFA_DATA(cda[CTA_TIMEOUT-1]));
-
+
if (!del_timer(&ct->timeout))
return -ETIME;
}
static int
-ctnetlink_create_conntrack(struct nfattr *cda[],
+ctnetlink_create_conntrack(struct nfattr *cda[],
struct nf_conntrack_tuple *otuple,
struct nf_conntrack_tuple *rtuple)
{
ct = nf_conntrack_alloc(otuple, rtuple);
if (ct == NULL || IS_ERR(ct))
- return -ENOMEM;
+ return -ENOMEM;
if (!cda[CTA_TIMEOUT-1])
goto err;
return 0;
-err:
+err:
nf_conntrack_free(ct);
return err;
}
-static int
-ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
- struct nlmsghdr *nlh, struct nfattr *cda[], int *errp)
+static int
+ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct nfattr *cda[])
{
struct nf_conntrack_tuple otuple, rtuple;
struct nf_conntrack_tuple_hash *h = NULL;
return err;
}
-/***********************************************************************
- * EXPECT
- ***********************************************************************/
+/***********************************************************************
+ * EXPECT
+ ***********************************************************************/
static inline int
ctnetlink_exp_dump_tuple(struct sk_buff *skb,
enum ctattr_expect type)
{
struct nfattr *nest_parms = NFA_NEST(skb, type);
-
+
if (ctnetlink_dump_tuples(skb, tuple) < 0)
goto nfattr_failure;
nfattr_failure:
return -1;
-}
+}
static inline int
ctnetlink_exp_dump_mask(struct sk_buff *skb,
static inline int
ctnetlink_exp_dump_expect(struct sk_buff *skb,
- const struct nf_conntrack_expect *exp)
+ const struct nf_conntrack_expect *exp)
{
struct nf_conn *master = exp->master;
__be32 timeout = htonl((exp->timeout.expires - jiffies) / HZ);
&master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
CTA_EXPECT_MASTER) < 0)
goto nfattr_failure;
-
+
NFA_PUT(skb, CTA_EXPECT_TIMEOUT, sizeof(timeout), &timeout);
NFA_PUT(skb, CTA_EXPECT_ID, sizeof(u_int32_t), &id);
return 0;
-
+
nfattr_failure:
return -1;
}
static int
ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
- int event,
- int nowait,
+ int event,
+ int nowait,
const struct nf_conntrack_expect *exp)
{
struct nlmsghdr *nlh;
struct nfgenmsg *nfmsg;
- unsigned char *b;
-
- b = skb->tail;
+ unsigned char *b = skb_tail_pointer(skb);
event |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg));
if (ctnetlink_exp_dump_expect(skb, exp) < 0)
goto nfattr_failure;
- nlh->nlmsg_len = skb->tail - b;
+ nlh->nlmsg_len = skb_tail_pointer(skb) - b;
return skb->len;
nlmsg_failure:
nfattr_failure:
- skb_trim(skb, b - skb->data);
+ nlmsg_trim(skb, b);
return -1;
}
struct nf_conntrack_expect *exp = (struct nf_conntrack_expect *)ptr;
struct sk_buff *skb;
unsigned int type;
- unsigned char *b;
+ sk_buff_data_t b;
int flags = 0;
if (events & IPEXP_NEW) {
goto out;
*id = exp->id;
}
-out:
+out:
read_unlock_bh(&nf_conntrack_lock);
return skb->len;
};
static int
-ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
- struct nlmsghdr *nlh, struct nfattr *cda[], int *errp)
+ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct nfattr *cda[])
{
struct nf_conntrack_tuple tuple;
struct nf_conntrack_expect *exp;
return -EINVAL;
if (nlh->nlmsg_flags & NLM_F_DUMP) {
- u32 rlen;
-
- if ((*errp = netlink_dump_start(ctnl, skb, nlh,
- ctnetlink_exp_dump_table,
- ctnetlink_done)) != 0)
- return -EINVAL;
- rlen = NLMSG_ALIGN(nlh->nlmsg_len);
- if (rlen > skb->len)
- rlen = skb->len;
- skb_pull(skb, rlen);
- return 0;
+ return netlink_dump_start(ctnl, skb, nlh,
+ ctnetlink_exp_dump_table,
+ ctnetlink_done);
}
if (cda[CTA_EXPECT_MASTER-1])
nf_conntrack_expect_put(exp);
return -ENOENT;
}
- }
+ }
err = -ENOMEM;
skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
if (!skb2)
goto out;
- err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid,
+ err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid,
nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW,
1, exp);
if (err <= 0)
}
static int
-ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
- struct nlmsghdr *nlh, struct nfattr *cda[], int *errp)
+ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct nfattr *cda[])
{
struct nf_conntrack_expect *exp, *tmp;
struct nf_conntrack_tuple tuple;
/* after list removal, usage count == 1 */
nf_conntrack_unexpect_related(exp);
- /* have to put what we 'get' above.
+ /* have to put what we 'get' above.
* after this line usage count == 0 */
nf_conntrack_expect_put(exp);
} else if (cda[CTA_EXPECT_HELP_NAME-1]) {
err = -ENOMEM;
goto out;
}
-
+
exp->expectfn = NULL;
exp->flags = 0;
exp->master = ct;
err = nf_conntrack_expect_related(exp);
nf_conntrack_expect_put(exp);
-out:
+out:
nf_ct_put(nf_ct_tuplehash_to_ctrack(h));
return err;
}
static int
ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb,
- struct nlmsghdr *nlh, struct nfattr *cda[], int *errp)
+ struct nlmsghdr *nlh, struct nfattr *cda[])
{
struct nf_conntrack_tuple tuple;
struct nf_conntrack_expect *exp;
projects / powerpc.git / blobdiff