* protocol helpers and general trouble making from userspace.
*
* (C) 2001 by Jay Schulist <jschlst@samba.org>
- * (C) 2002-2005 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org>
* (C) 2003 by Patrick Mchardy <kaber@trash.net>
- * (C) 2005 by Pablo Neira Ayuso <pablo@eurodev.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.
MODULE_LICENSE("GPL");
-static char __initdata version[] = "0.92";
+static char __initdata version[] = "0.93";
#if 0
#define DEBUGP printk
static inline int
ctnetlink_dump_tuples_proto(struct sk_buff *skb,
- const struct nf_conntrack_tuple *tuple)
+ const struct nf_conntrack_tuple *tuple,
+ struct nf_conntrack_protocol *proto)
{
- struct nf_conntrack_protocol *proto;
int ret = 0;
+ struct nfattr *nest_parms = NFA_NEST(skb, CTA_TUPLE_PROTO);
NFA_PUT(skb, CTA_PROTO_NUM, sizeof(u_int8_t), &tuple->dst.protonum);
- /* If no protocol helper is found, this function will return the
- * generic protocol helper, so proto won't *ever* be NULL */
- proto = nf_ct_proto_find_get(tuple->src.l3num, tuple->dst.protonum);
if (likely(proto->tuple_to_nfattr))
ret = proto->tuple_to_nfattr(skb, tuple);
- nf_ct_proto_put(proto);
+ NFA_NEST_END(skb, nest_parms);
return ret;
}
static inline int
-ctnetlink_dump_tuples(struct sk_buff *skb,
- const struct nf_conntrack_tuple *tuple)
+ctnetlink_dump_tuples_ip(struct sk_buff *skb,
+ const struct nf_conntrack_tuple *tuple,
+ struct nf_conntrack_l3proto *l3proto)
{
- struct nfattr *nest_parms;
- struct nf_conntrack_l3proto *l3proto;
int ret = 0;
-
- l3proto = nf_ct_l3proto_find_get(tuple->src.l3num);
-
- nest_parms = NFA_NEST(skb, CTA_TUPLE_IP);
+ struct nfattr *nest_parms = NFA_NEST(skb, CTA_TUPLE_IP);
+
if (likely(l3proto->tuple_to_nfattr))
ret = l3proto->tuple_to_nfattr(skb, tuple);
+
NFA_NEST_END(skb, nest_parms);
+ return ret;
+
+nfattr_failure:
+ return -1;
+}
+
+static inline int
+ctnetlink_dump_tuples(struct sk_buff *skb,
+ const struct nf_conntrack_tuple *tuple)
+{
+ int ret;
+ struct nf_conntrack_l3proto *l3proto;
+ struct nf_conntrack_protocol *proto;
+
+ l3proto = nf_ct_l3proto_find_get(tuple->src.l3num);
+ ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto);
nf_ct_l3proto_put(l3proto);
if (unlikely(ret < 0))
return ret;
- nest_parms = NFA_NEST(skb, CTA_TUPLE_PROTO);
- ret = ctnetlink_dump_tuples_proto(skb, tuple);
- NFA_NEST_END(skb, nest_parms);
+ proto = nf_ct_proto_find_get(tuple->src.l3num, tuple->dst.protonum);
+ ret = ctnetlink_dump_tuples_proto(skb, tuple, proto);
+ nf_ct_proto_put(proto);
return ret;
-
-nfattr_failure:
- return -1;
}
static inline int
ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct)
{
struct nfattr *nest_helper;
+ const struct nf_conn_help *help = nfct_help(ct);
- if (!ct->helper)
+ if (!help || !help->helper)
return 0;
nest_helper = NFA_NEST(skb, CTA_HELP);
- NFA_PUT(skb, CTA_HELP_NAME, strlen(ct->helper->name), ct->helper->name);
+ NFA_PUT(skb, CTA_HELP_NAME, strlen(help->helper->name), help->helper->name);
- if (ct->helper->to_nfattr)
- ct->helper->to_nfattr(skb, ct);
+ if (help->helper->to_nfattr)
+ help->helper->to_nfattr(skb, ct);
NFA_NEST_END(skb, nest_helper);
group = NFNLGRP_CONNTRACK_UPDATE;
} else
return NOTIFY_DONE;
-
- /* FIXME: Check if there are any listeners before, don't hurt performance */
-
+
+ if (!nfnetlink_has_listeners(group))
+ return NOTIFY_DONE;
+
skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
if (!skb)
return NOTIFY_DONE;
ctnetlink_change_helper(struct nf_conn *ct, struct nfattr *cda[])
{
struct nf_conntrack_helper *helper;
+ struct nf_conn_help *help = nfct_help(ct);
char *helpname;
int err;
DEBUGP("entered %s\n", __FUNCTION__);
+ if (!help) {
+ /* FIXME: we need to reallocate and rehash */
+ return -EBUSY;
+ }
+
/* don't change helper of sibling connections */
if (ct->master)
return -EINVAL;
return -EINVAL;
}
- if (ct->helper) {
+ if (help->helper) {
if (!helper) {
/* we had a helper before ... */
nf_ct_remove_expectations(ct);
- ct->helper = NULL;
+ help->helper = NULL;
} else {
/* need to zero data of old helper */
- memset(&ct->help, 0, sizeof(ct->help));
+ memset(&help->help, 0, sizeof(help->help));
}
}
- ct->helper = helper;
+ help->helper = helper;
return 0;
}
ct->mark = ntohl(*(u_int32_t *)NFA_DATA(cda[CTA_MARK-1]));
#endif
- ct->helper = nf_ct_helper_find_get(rtuple);
-
add_timer(&ct->timeout);
nf_conntrack_hash_insert(ct);
- if (ct->helper)
- nf_ct_helper_put(ct->helper);
-
DEBUGP("conntrack with id %u inserted\n", ct->id);
return 0;
}
static inline int
+ctnetlink_exp_dump_mask(struct sk_buff *skb,
+ const struct nf_conntrack_tuple *tuple,
+ const struct nf_conntrack_tuple *mask)
+{
+ int ret;
+ struct nf_conntrack_l3proto *l3proto;
+ struct nf_conntrack_protocol *proto;
+ struct nfattr *nest_parms = NFA_NEST(skb, CTA_EXPECT_MASK);
+
+ l3proto = nf_ct_l3proto_find_get(tuple->src.l3num);
+ ret = ctnetlink_dump_tuples_ip(skb, mask, l3proto);
+ nf_ct_l3proto_put(l3proto);
+
+ if (unlikely(ret < 0))
+ goto nfattr_failure;
+
+ proto = nf_ct_proto_find_get(tuple->src.l3num, tuple->dst.protonum);
+ ret = ctnetlink_dump_tuples_proto(skb, mask, proto);
+ nf_ct_proto_put(proto);
+ if (unlikely(ret < 0))
+ goto nfattr_failure;
+
+ NFA_NEST_END(skb, nest_parms);
+
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+static inline int
ctnetlink_exp_dump_expect(struct sk_buff *skb,
const struct nf_conntrack_expect *exp)
{
if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0)
goto nfattr_failure;
- if (ctnetlink_exp_dump_tuple(skb, &exp->mask, CTA_EXPECT_MASK) < 0)
+ if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0)
goto nfattr_failure;
if (ctnetlink_exp_dump_tuple(skb,
&master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
}
list_for_each_entry_safe(exp, tmp, &nf_conntrack_expect_list,
list) {
- if (exp->master->helper == h
+ struct nf_conn_help *m_help = nfct_help(exp->master);
+ if (m_help->helper == h
&& del_timer(&exp->timeout)) {
nf_ct_unlink_expect(exp);
nf_conntrack_expect_put(exp);
struct nf_conntrack_tuple_hash *h = NULL;
struct nf_conntrack_expect *exp;
struct nf_conn *ct;
+ struct nf_conn_help *help;
int err = 0;
DEBUGP("entered %s\n", __FUNCTION__);
if (!h)
return -ENOENT;
ct = nf_ct_tuplehash_to_ctrack(h);
+ help = nfct_help(ct);
- if (!ct->helper) {
+ if (!help || !help->helper) {
/* such conntrack hasn't got any helper, abort */
err = -EINVAL;
goto out;
};
MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK);
+MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP);
static int __init ctnetlink_init(void)
{
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff