static inline int
ctnetlink_dump_tuples(struct sk_buff *skb,
const struct nf_conntrack_tuple *tuple)
{
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);
if (likely(l3proto->tuple_to_nfattr))
ret = l3proto->tuple_to_nfattr(skb, tuple);
NFA_NEST_END(skb, nest_parms);
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);
return ret;
nfattr_failure:
return -1;
}
static int
ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
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;
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 =
ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
nfmsg->version = NFNETLINK_V0;
nfmsg->res_id = 0;
nest_parms = NFA_NEST(skb, CTA_TUPLE_ORIG);
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;
NFA_NEST_END(skb, nest_parms);
if (ctnetlink_dump_status(skb, ct) < 0 ||
ctnetlink_dump_timeout(skb, ct) < 0 ||
ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 ||
ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 ||
ctnetlink_dump_protoinfo(skb, ct) < 0 ||
ctnetlink_dump_helpinfo(skb, ct) < 0 ||
ctnetlink_dump_mark(skb, ct) < 0 ||
ctnetlink_dump_id(skb, ct) < 0 ||
ctnetlink_dump_use(skb, ct) < 0)
goto nfattr_failure;
nlh->nlmsg_len = skb->tail - b;
return skb->len;
nlmsg_failure:
nfattr_failure:
skb_trim(skb, b - skb->data);
return -1;
}
static inline int
ctnetlink_dump_protoinfo(struct sk_buff *skb, const struct nf_conn *ct)
{
struct nf_conntrack_protocol *proto = nf_ct_proto_find_get(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num, ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum);
struct nfattr *nest_proto;
int ret;
if (!proto->to_nfattr) {
nf_ct_proto_put(proto);
return 0;
}
nest_proto = NFA_NEST(skb, CTA_PROTOINFO);
ret = proto->to_nfattr(skb, nest_proto, ct);
nf_ct_proto_put(proto);
NFA_NEST_END(skb, nest_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);
struct nf_conntrack_helper *helper;
if (!help)
return 0;
rcu_read_lock();
helper = rcu_dereference(help->helper);
if (!helper)
goto out;
nest_helper = NFA_NEST(skb, CTA_HELP);
NFA_PUT(skb, CTA_HELP_NAME, strlen(helper->name), helper->name);
if (helper->to_nfattr)
helper->to_nfattr(skb, ct);
NFA_NEST_END(skb, nest_helper);
out:
rcu_read_unlock();
return 0;
nfattr_failure:
rcu_read_unlock();
return -1;
}
static inline int
ctnetlink_dump_tuples_ip(struct sk_buff *skb,
const struct nf_conntrack_tuple *tuple,
struct nf_conntrack_l3proto *l3proto)
{
int ret = 0;
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 int tcp_to_nfattr(struct sk_buff *skb, struct nfattr *nfa,
const struct nf_conn *ct)
{
struct nfattr *nest_parms;
read_lock_bh(&tcp_lock);
nest_parms = NFA_NEST(skb, CTA_PROTOINFO_TCP);
NFA_PUT(skb, CTA_PROTOINFO_TCP_STATE, sizeof(u_int8_t),
&ct->proto.tcp.state);
read_unlock_bh(&tcp_lock);
NFA_NEST_END(skb, nest_parms);
return 0;
nfattr_failure:
read_unlock_bh(&tcp_lock);
return -1;
}
static inline int
ctnetlink_dump_tuples_proto(struct sk_buff *skb,
const struct nf_conntrack_tuple *tuple,
struct nf_conntrack_l4proto *l4proto)
{
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 (likely(l4proto->tuple_to_nfattr))
ret = l4proto->tuple_to_nfattr(skb, tuple);
NFA_NEST_END(skb, nest_parms);
return ret;
nfattr_failure:
return -1;
}
static inline int
ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct,
enum ip_conntrack_dir dir)
{
enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG;
struct nfattr *nest_count = NFA_NEST(skb, type);
u_int32_t tmp;
tmp = htonl(ct->counters[dir].packets);
NFA_PUT(skb, CTA_COUNTERS32_PACKETS, sizeof(u_int32_t), &tmp);
tmp = htonl(ct->counters[dir].bytes);
NFA_PUT(skb, CTA_COUNTERS32_BYTES, sizeof(u_int32_t), &tmp);
NFA_NEST_END(skb, nest_count);
return 0;
nfattr_failure:
return -1;
}
static inline int
ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct)
{
struct nfattr *nest_helper;
if (!ct->helper)
return 0;
nest_helper = NFA_NEST(skb, CTA_HELP);
NFA_PUT(skb, CTA_HELP_NAME, strlen(ct->helper->name), ct->helper->name);
if (ct->helper->to_nfattr)
ct->helper->to_nfattr(skb, ct);
NFA_NEST_END(skb, nest_helper);
return 0;
nfattr_failure:
return -1;
}
