1 files changed, 24 insertions, 760 deletions

diff --git a/net/ipv4/tcp_diag.c b/net/ipv4/tcp_diag.c
index f66945cb158f..c148c1081880 100644
--- a/net/ipv4/tcp_diag.c
+++ b/net/ipv4/tcp_diag.c
@@ -1,5 +1,5 @@
 /*
- * tcp_diag.c	Module for monitoring TCP sockets.
+ * tcp_diag.c	Module for monitoring TCP transport protocols sockets.
  *
  * Version:	$Id: tcp_diag.c,v 1.3 2002/02/01 22:01:04 davem Exp $
  *
@@ -12,779 +12,43 @@
  */
 
 #include <linux/config.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/fcntl.h>
-#include <linux/random.h>
-#include <linux/cache.h>
-#include <linux/init.h>
-#include <linux/time.h>
-
-#include <net/icmp.h>
-#include <net/tcp.h>
-#include <net/ipv6.h>
-#include <net/inet_common.h>
-
-#include <linux/inet.h>
-#include <linux/stddef.h>
-
-#include <linux/tcp_diag.h>
 
-struct tcpdiag_entry
-{
-	u32 *saddr;
-	u32 *daddr;
-	u16 sport;
-	u16 dport;
-	u16 family;
-	u16 userlocks;
-};
+#include <linux/module.h>
+#include <linux/inet_diag.h>
 
-static struct sock *tcpnl;
+#include <linux/tcp.h>
 
-#define TCPDIAG_PUT(skb, attrtype, attrlen) \
-	RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
+#include <net/tcp.h>
 
-static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk,
-			int ext, u32 pid, u32 seq, u16 nlmsg_flags)
+static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
+			      void *_info)
 {
-	struct inet_sock *inet = inet_sk(sk);
-	struct tcp_sock *tp = tcp_sk(sk);
-	struct tcpdiagmsg *r;
-	struct nlmsghdr  *nlh;
-	struct tcp_info  *info = NULL;
-	struct tcpdiag_meminfo  *minfo = NULL;
-	unsigned char	 *b = skb->tail;
-
-	nlh = NLMSG_PUT(skb, pid, seq, TCPDIAG_GETSOCK, sizeof(*r));
-	nlh->nlmsg_flags = nlmsg_flags;
-	r = NLMSG_DATA(nlh);
-	if (sk->sk_state != TCP_TIME_WAIT) {
-		if (ext & (1<<(TCPDIAG_MEMINFO-1)))
-			minfo = TCPDIAG_PUT(skb, TCPDIAG_MEMINFO, sizeof(*minfo));
-		if (ext & (1<<(TCPDIAG_INFO-1)))
-			info = TCPDIAG_PUT(skb, TCPDIAG_INFO, sizeof(*info));
-		
-		if (ext & (1<<(TCPDIAG_CONG-1))) {
-			size_t len = strlen(tp->ca_ops->name);
-			strcpy(TCPDIAG_PUT(skb, TCPDIAG_CONG, len+1),
-			       tp->ca_ops->name);
-		}
-	}
-	r->tcpdiag_family = sk->sk_family;
-	r->tcpdiag_state = sk->sk_state;
-	r->tcpdiag_timer = 0;
-	r->tcpdiag_retrans = 0;
-
-	r->id.tcpdiag_if = sk->sk_bound_dev_if;
-	r->id.tcpdiag_cookie[0] = (u32)(unsigned long)sk;
-	r->id.tcpdiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1);
-
-	if (r->tcpdiag_state == TCP_TIME_WAIT) {
-		struct tcp_tw_bucket *tw = (struct tcp_tw_bucket*)sk;
-		long tmo = tw->tw_ttd - jiffies;
-		if (tmo < 0)
-			tmo = 0;
-
-		r->id.tcpdiag_sport = tw->tw_sport;
-		r->id.tcpdiag_dport = tw->tw_dport;
-		r->id.tcpdiag_src[0] = tw->tw_rcv_saddr;
-		r->id.tcpdiag_dst[0] = tw->tw_daddr;
-		r->tcpdiag_state = tw->tw_substate;
-		r->tcpdiag_timer = 3;
-		r->tcpdiag_expires = (tmo*1000+HZ-1)/HZ;
-		r->tcpdiag_rqueue = 0;
-		r->tcpdiag_wqueue = 0;
-		r->tcpdiag_uid = 0;
-		r->tcpdiag_inode = 0;
-#ifdef CONFIG_IP_TCPDIAG_IPV6
-		if (r->tcpdiag_family == AF_INET6) {
-			ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_src,
-				       &tw->tw_v6_rcv_saddr);
-			ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_dst,
-				       &tw->tw_v6_daddr);
-		}
-#endif
-		nlh->nlmsg_len = skb->tail - b;
-		return skb->len;
-	}
-
-	r->id.tcpdiag_sport = inet->sport;
-	r->id.tcpdiag_dport = inet->dport;
-	r->id.tcpdiag_src[0] = inet->rcv_saddr;
-	r->id.tcpdiag_dst[0] = inet->daddr;
-
-#ifdef CONFIG_IP_TCPDIAG_IPV6
-	if (r->tcpdiag_family == AF_INET6) {
-		struct ipv6_pinfo *np = inet6_sk(sk);
-
-		ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_src,
-			       &np->rcv_saddr);
-		ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_dst,
-			       &np->daddr);
-	}
-#endif
-
-#define EXPIRES_IN_MS(tmo)  ((tmo-jiffies)*1000+HZ-1)/HZ
-
-	if (tp->pending == TCP_TIME_RETRANS) {
-		r->tcpdiag_timer = 1;
-		r->tcpdiag_retrans = tp->retransmits;
-		r->tcpdiag_expires = EXPIRES_IN_MS(tp->timeout);
-	} else if (tp->pending == TCP_TIME_PROBE0) {
-		r->tcpdiag_timer = 4;
-		r->tcpdiag_retrans = tp->probes_out;
-		r->tcpdiag_expires = EXPIRES_IN_MS(tp->timeout);
-	} else if (timer_pending(&sk->sk_timer)) {
-		r->tcpdiag_timer = 2;
-		r->tcpdiag_retrans = tp->probes_out;
-		r->tcpdiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
-	} else {
-		r->tcpdiag_timer = 0;
-		r->tcpdiag_expires = 0;
-	}
-#undef EXPIRES_IN_MS
+	const struct tcp_sock *tp = tcp_sk(sk);
+	struct tcp_info *info = _info;
 
-	r->tcpdiag_rqueue = tp->rcv_nxt - tp->copied_seq;
-	r->tcpdiag_wqueue = tp->write_seq - tp->snd_una;
-	r->tcpdiag_uid = sock_i_uid(sk);
-	r->tcpdiag_inode = sock_i_ino(sk);
-
-	if (minfo) {
-		minfo->tcpdiag_rmem = atomic_read(&sk->sk_rmem_alloc);
-		minfo->tcpdiag_wmem = sk->sk_wmem_queued;
-		minfo->tcpdiag_fmem = sk->sk_forward_alloc;
-		minfo->tcpdiag_tmem = atomic_read(&sk->sk_wmem_alloc);
-	}
-
-	if (info) 
+	r->idiag_rqueue = tp->rcv_nxt - tp->copied_seq;
+	r->idiag_wqueue = tp->write_seq - tp->snd_una;
+	if (info != NULL)
 		tcp_get_info(sk, info);
-
-	if (sk->sk_state < TCP_TIME_WAIT && tp->ca_ops->get_info)
-		tp->ca_ops->get_info(tp, ext, skb);
-
-	nlh->nlmsg_len = skb->tail - b;
-	return skb->len;
-
-rtattr_failure:
-nlmsg_failure:
-	skb_trim(skb, b - skb->data);
-	return -1;
-}
-
-extern struct sock *tcp_v4_lookup(u32 saddr, u16 sport, u32 daddr, u16 dport,
-				  int dif);
-#ifdef CONFIG_IP_TCPDIAG_IPV6
-extern struct sock *tcp_v6_lookup(struct in6_addr *saddr, u16 sport,
-				  struct in6_addr *daddr, u16 dport,
-				  int dif);
-#else
-static inline struct sock *tcp_v6_lookup(struct in6_addr *saddr, u16 sport,
-					 struct in6_addr *daddr, u16 dport,
-					 int dif)
-{
-	return NULL;
-}
-#endif
-
-static int tcpdiag_get_exact(struct sk_buff *in_skb, const struct nlmsghdr *nlh)
-{
-	int err;
-	struct sock *sk;
-	struct tcpdiagreq *req = NLMSG_DATA(nlh);
-	struct sk_buff *rep;
-
-	if (req->tcpdiag_family == AF_INET) {
-		sk = tcp_v4_lookup(req->id.tcpdiag_dst[0], req->id.tcpdiag_dport,
-				   req->id.tcpdiag_src[0], req->id.tcpdiag_sport,
-				   req->id.tcpdiag_if);
-	}
-#ifdef CONFIG_IP_TCPDIAG_IPV6
-	else if (req->tcpdiag_family == AF_INET6) {
-		sk = tcp_v6_lookup((struct in6_addr*)req->id.tcpdiag_dst, req->id.tcpdiag_dport,
-				   (struct in6_addr*)req->id.tcpdiag_src, req->id.tcpdiag_sport,
-				   req->id.tcpdiag_if);
-	}
-#endif
-	else {
-		return -EINVAL;
-	}
-
-	if (sk == NULL)
-		return -ENOENT;
-
-	err = -ESTALE;
-	if ((req->id.tcpdiag_cookie[0] != TCPDIAG_NOCOOKIE ||
-	     req->id.tcpdiag_cookie[1] != TCPDIAG_NOCOOKIE) &&
-	    ((u32)(unsigned long)sk != req->id.tcpdiag_cookie[0] ||
-	     (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.tcpdiag_cookie[1]))
-		goto out;
-
-	err = -ENOMEM;
-	rep = alloc_skb(NLMSG_SPACE(sizeof(struct tcpdiagmsg)+
-				    sizeof(struct tcpdiag_meminfo)+
-				    sizeof(struct tcp_info)+64), GFP_KERNEL);
-	if (!rep)
-		goto out;
-
-	if (tcpdiag_fill(rep, sk, req->tcpdiag_ext,
-			 NETLINK_CB(in_skb).pid,
-			 nlh->nlmsg_seq, 0) <= 0)
-		BUG();
-
-	err = netlink_unicast(tcpnl, rep, NETLINK_CB(in_skb).pid, MSG_DONTWAIT);
-	if (err > 0)
-		err = 0;
-
-out:
-	if (sk) {
-		if (sk->sk_state == TCP_TIME_WAIT)
-			tcp_tw_put((struct tcp_tw_bucket*)sk);
-		else
-			sock_put(sk);
-	}
-	return err;
-}
-
-static int bitstring_match(const u32 *a1, const u32 *a2, int bits)
-{
-	int words = bits >> 5;
-
-	bits &= 0x1f;
-
-	if (words) {
-		if (memcmp(a1, a2, words << 2))
-			return 0;
-	}
-	if (bits) {
-		__u32 w1, w2;
-		__u32 mask;
-
-		w1 = a1[words];
-		w2 = a2[words];
-
-		mask = htonl((0xffffffff) << (32 - bits));
-
-		if ((w1 ^ w2) & mask)
-			return 0;
-	}
-
-	return 1;
-}
-
-
-static int tcpdiag_bc_run(const void *bc, int len,
-			  const struct tcpdiag_entry *entry)
-{
-	while (len > 0) {
-		int yes = 1;
-		const struct tcpdiag_bc_op *op = bc;
-
-		switch (op->code) {
-		case TCPDIAG_BC_NOP:
-			break;
-		case TCPDIAG_BC_JMP:
-			yes = 0;
-			break;
-		case TCPDIAG_BC_S_GE:
-			yes = entry->sport >= op[1].no;
-			break;
-		case TCPDIAG_BC_S_LE:
-			yes = entry->dport <= op[1].no;
-			break;
-		case TCPDIAG_BC_D_GE:
-			yes = entry->dport >= op[1].no;
-			break;
-		case TCPDIAG_BC_D_LE:
-			yes = entry->dport <= op[1].no;
-			break;
-		case TCPDIAG_BC_AUTO:
-			yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
-			break;
-		case TCPDIAG_BC_S_COND:
-		case TCPDIAG_BC_D_COND:
-		{
-			struct tcpdiag_hostcond *cond = (struct tcpdiag_hostcond*)(op+1);
-			u32 *addr;
-
-			if (cond->port != -1 &&
-			    cond->port != (op->code == TCPDIAG_BC_S_COND ?
-					     entry->sport : entry->dport)) {
-				yes = 0;
-				break;
-			}
-			
-			if (cond->prefix_len == 0)
-				break;
-
-			if (op->code == TCPDIAG_BC_S_COND)
-				addr = entry->saddr;
-			else
-				addr = entry->daddr;
-
-			if (bitstring_match(addr, cond->addr, cond->prefix_len))
-				break;
-			if (entry->family == AF_INET6 &&
-			    cond->family == AF_INET) {
-				if (addr[0] == 0 && addr[1] == 0 &&
-				    addr[2] == htonl(0xffff) &&
-				    bitstring_match(addr+3, cond->addr, cond->prefix_len))
-					break;
-			}
-			yes = 0;
-			break;
-		}
-		}
-
-		if (yes) { 
-			len -= op->yes;
-			bc += op->yes;
-		} else {
-			len -= op->no;
-			bc += op->no;
-		}
-	}
-	return (len == 0);
-}
-
-static int valid_cc(const void *bc, int len, int cc)
-{
-	while (len >= 0) {
-		const struct tcpdiag_bc_op *op = bc;
-
-		if (cc > len)
-			return 0;
-		if (cc == len)
-			return 1;
-		if (op->yes < 4)
-			return 0;
-		len -= op->yes;
-		bc  += op->yes;
-	}
-	return 0;
-}
-
-static int tcpdiag_bc_audit(const void *bytecode, int bytecode_len)
-{
-	const unsigned char *bc = bytecode;
-	int  len = bytecode_len;
-
-	while (len > 0) {
-		struct tcpdiag_bc_op *op = (struct tcpdiag_bc_op*)bc;
-
-//printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
-		switch (op->code) {
-		case TCPDIAG_BC_AUTO:
-		case TCPDIAG_BC_S_COND:
-		case TCPDIAG_BC_D_COND:
-		case TCPDIAG_BC_S_GE:
-		case TCPDIAG_BC_S_LE:
-		case TCPDIAG_BC_D_GE:
-		case TCPDIAG_BC_D_LE:
-			if (op->yes < 4 || op->yes > len+4)
-				return -EINVAL;
-		case TCPDIAG_BC_JMP:
-			if (op->no < 4 || op->no > len+4)
-				return -EINVAL;
-			if (op->no < len &&
-			    !valid_cc(bytecode, bytecode_len, len-op->no))
-				return -EINVAL;
-			break;
-		case TCPDIAG_BC_NOP:
-			if (op->yes < 4 || op->yes > len+4)
-				return -EINVAL;
-			break;
-		default:
-			return -EINVAL;
-		}
-		bc += op->yes;
-		len -= op->yes;
-	}
-	return len == 0 ? 0 : -EINVAL;
-}
-
-static int tcpdiag_dump_sock(struct sk_buff *skb, struct sock *sk,
-			     struct netlink_callback *cb)
-{
-	struct tcpdiagreq *r = NLMSG_DATA(cb->nlh);
-
-	if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
-		struct tcpdiag_entry entry;
-		struct rtattr *bc = (struct rtattr *)(r + 1);
-		struct inet_sock *inet = inet_sk(sk);
-
-		entry.family = sk->sk_family;
-#ifdef CONFIG_IP_TCPDIAG_IPV6
-		if (entry.family == AF_INET6) {
-			struct ipv6_pinfo *np = inet6_sk(sk);
-
-			entry.saddr = np->rcv_saddr.s6_addr32;
-			entry.daddr = np->daddr.s6_addr32;
-		} else
-#endif
-		{
-			entry.saddr = &inet->rcv_saddr;
-			entry.daddr = &inet->daddr;
-		}
-		entry.sport = inet->num;
-		entry.dport = ntohs(inet->dport);
-		entry.userlocks = sk->sk_userlocks;
-
-		if (!tcpdiag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry))
-			return 0;
-	}
-
-	return tcpdiag_fill(skb, sk, r->tcpdiag_ext, NETLINK_CB(cb->skb).pid,
-			    cb->nlh->nlmsg_seq, NLM_F_MULTI);
 }
 
-static int tcpdiag_fill_req(struct sk_buff *skb, struct sock *sk,
-			    struct request_sock *req,
-			    u32 pid, u32 seq)
-{
-	const struct inet_request_sock *ireq = inet_rsk(req);
-	struct inet_sock *inet = inet_sk(sk);
-	unsigned char *b = skb->tail;
-	struct tcpdiagmsg *r;
-	struct nlmsghdr *nlh;
-	long tmo;
-
-	nlh = NLMSG_PUT(skb, pid, seq, TCPDIAG_GETSOCK, sizeof(*r));
-	nlh->nlmsg_flags = NLM_F_MULTI;
-	r = NLMSG_DATA(nlh);
-
-	r->tcpdiag_family = sk->sk_family;
-	r->tcpdiag_state = TCP_SYN_RECV;
-	r->tcpdiag_timer = 1;
-	r->tcpdiag_retrans = req->retrans;
-
-	r->id.tcpdiag_if = sk->sk_bound_dev_if;
-	r->id.tcpdiag_cookie[0] = (u32)(unsigned long)req;
-	r->id.tcpdiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1);
-
-	tmo = req->expires - jiffies;
-	if (tmo < 0)
-		tmo = 0;
-
-	r->id.tcpdiag_sport = inet->sport;
-	r->id.tcpdiag_dport = ireq->rmt_port;
-	r->id.tcpdiag_src[0] = ireq->loc_addr;
-	r->id.tcpdiag_dst[0] = ireq->rmt_addr;
-	r->tcpdiag_expires = jiffies_to_msecs(tmo),
-	r->tcpdiag_rqueue = 0;
-	r->tcpdiag_wqueue = 0;
-	r->tcpdiag_uid = sock_i_uid(sk);
-	r->tcpdiag_inode = 0;
-#ifdef CONFIG_IP_TCPDIAG_IPV6
-	if (r->tcpdiag_family == AF_INET6) {
-		ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_src,
-			       &tcp6_rsk(req)->loc_addr);
-		ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_dst,
-			       &tcp6_rsk(req)->rmt_addr);
-	}
-#endif
-	nlh->nlmsg_len = skb->tail - b;
-
-	return skb->len;
-
-nlmsg_failure:
-	skb_trim(skb, b - skb->data);
-	return -1;
-}
-
-static int tcpdiag_dump_reqs(struct sk_buff *skb, struct sock *sk,
-			     struct netlink_callback *cb)
-{
-	struct tcpdiag_entry entry;
-	struct tcpdiagreq *r = NLMSG_DATA(cb->nlh);
-	struct tcp_sock *tp = tcp_sk(sk);
-	struct listen_sock *lopt;
-	struct rtattr *bc = NULL;
-	struct inet_sock *inet = inet_sk(sk);
-	int j, s_j;
-	int reqnum, s_reqnum;
-	int err = 0;
-
-	s_j = cb->args[3];
-	s_reqnum = cb->args[4];
-
-	if (s_j > 0)
-		s_j--;
-
-	entry.family = sk->sk_family;
-
-	read_lock_bh(&tp->accept_queue.syn_wait_lock);
-
-	lopt = tp->accept_queue.listen_opt;
-	if (!lopt || !lopt->qlen)
-		goto out;
-
-	if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
-		bc = (struct rtattr *)(r + 1);
-		entry.sport = inet->num;
-		entry.userlocks = sk->sk_userlocks;
-	}
-
-	for (j = s_j; j < TCP_SYNQ_HSIZE; j++) {
-		struct request_sock *req, *head = lopt->syn_table[j];
-
-		reqnum = 0;
-		for (req = head; req; reqnum++, req = req->dl_next) {
-			struct inet_request_sock *ireq = inet_rsk(req);
-
-			if (reqnum < s_reqnum)
-				continue;
-			if (r->id.tcpdiag_dport != ireq->rmt_port &&
-			    r->id.tcpdiag_dport)
-				continue;
-
-			if (bc) {
-				entry.saddr =
-#ifdef CONFIG_IP_TCPDIAG_IPV6
-					(entry.family == AF_INET6) ?
-					tcp6_rsk(req)->loc_addr.s6_addr32 :
-#endif
-					&ireq->loc_addr;
-				entry.daddr = 
-#ifdef CONFIG_IP_TCPDIAG_IPV6
-					(entry.family == AF_INET6) ?
-					tcp6_rsk(req)->rmt_addr.s6_addr32 :
-#endif
-					&ireq->rmt_addr;
-				entry.dport = ntohs(ireq->rmt_port);
-
-				if (!tcpdiag_bc_run(RTA_DATA(bc),
-						    RTA_PAYLOAD(bc), &entry))
-					continue;
-			}
-
-			err = tcpdiag_fill_req(skb, sk, req,
-					       NETLINK_CB(cb->skb).pid,
-					       cb->nlh->nlmsg_seq);
-			if (err < 0) {
-				cb->args[3] = j + 1;
-				cb->args[4] = reqnum;
-				goto out;
-			}
-		}
-
-		s_reqnum = 0;
-	}
-
-out:
-	read_unlock_bh(&tp->accept_queue.syn_wait_lock);
-
-	return err;
-}
-
-static int tcpdiag_dump(struct sk_buff *skb, struct netlink_callback *cb)
-{
-	int i, num;
-	int s_i, s_num;
-	struct tcpdiagreq *r = NLMSG_DATA(cb->nlh);
-
-	s_i = cb->args[1];
-	s_num = num = cb->args[2];
-
-	if (cb->args[0] == 0) {
-		if (!(r->tcpdiag_states&(TCPF_LISTEN|TCPF_SYN_RECV)))
-			goto skip_listen_ht;
-		tcp_listen_lock();
-		for (i = s_i; i < TCP_LHTABLE_SIZE; i++) {
-			struct sock *sk;
-			struct hlist_node *node;
-
-			num = 0;
-			sk_for_each(sk, node, &tcp_listening_hash[i]) {
-				struct inet_sock *inet = inet_sk(sk);
-
-				if (num < s_num) {
-					num++;
-					continue;
-				}
-
-				if (r->id.tcpdiag_sport != inet->sport &&
-				    r->id.tcpdiag_sport)
-					goto next_listen;
-
-				if (!(r->tcpdiag_states&TCPF_LISTEN) ||
-				    r->id.tcpdiag_dport ||
-				    cb->args[3] > 0)
-					goto syn_recv;
-
-				if (tcpdiag_dump_sock(skb, sk, cb) < 0) {
-					tcp_listen_unlock();
-					goto done;
-				}
-
-syn_recv:
-				if (!(r->tcpdiag_states&TCPF_SYN_RECV))
-					goto next_listen;
-
-				if (tcpdiag_dump_reqs(skb, sk, cb) < 0) {
-					tcp_listen_unlock();
-					goto done;
-				}
-
-next_listen:
-				cb->args[3] = 0;
-				cb->args[4] = 0;
-				++num;
-			}
-
-			s_num = 0;
-			cb->args[3] = 0;
-			cb->args[4] = 0;
-		}
-		tcp_listen_unlock();
-skip_listen_ht:
-		cb->args[0] = 1;
-		s_i = num = s_num = 0;
-	}
-
-	if (!(r->tcpdiag_states&~(TCPF_LISTEN|TCPF_SYN_RECV)))
-		return skb->len;
-
-	for (i = s_i; i < tcp_ehash_size; i++) {
-		struct tcp_ehash_bucket *head = &tcp_ehash[i];
-		struct sock *sk;
-		struct hlist_node *node;
-
-		if (i > s_i)
-			s_num = 0;
-
-		read_lock_bh(&head->lock);
-
-		num = 0;
-		sk_for_each(sk, node, &head->chain) {
-			struct inet_sock *inet = inet_sk(sk);
-
-			if (num < s_num)
-				goto next_normal;
-			if (!(r->tcpdiag_states & (1 << sk->sk_state)))
-				goto next_normal;
-			if (r->id.tcpdiag_sport != inet->sport &&
-			    r->id.tcpdiag_sport)
-				goto next_normal;
-			if (r->id.tcpdiag_dport != inet->dport && r->id.tcpdiag_dport)
-				goto next_normal;
-			if (tcpdiag_dump_sock(skb, sk, cb) < 0) {
-				read_unlock_bh(&head->lock);
-				goto done;
-			}
-next_normal:
-			++num;
-		}
-
-		if (r->tcpdiag_states&TCPF_TIME_WAIT) {
-			sk_for_each(sk, node,
-				    &tcp_ehash[i + tcp_ehash_size].chain) {
-				struct inet_sock *inet = inet_sk(sk);
-
-				if (num < s_num)
-					goto next_dying;
-				if (r->id.tcpdiag_sport != inet->sport &&
-				    r->id.tcpdiag_sport)
-					goto next_dying;
-				if (r->id.tcpdiag_dport != inet->dport &&
-				    r->id.tcpdiag_dport)
-					goto next_dying;
-				if (tcpdiag_dump_sock(skb, sk, cb) < 0) {
-					read_unlock_bh(&head->lock);
-					goto done;
-				}
-next_dying:
-				++num;
-			}
-		}
-		read_unlock_bh(&head->lock);
-	}
-
-done:
-	cb->args[1] = i;
-	cb->args[2] = num;
-	return skb->len;
-}
-
-static int tcpdiag_dump_done(struct netlink_callback *cb)
-{
-	return 0;
-}
-
-
-static __inline__ int
-tcpdiag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
-{
-	if (!(nlh->nlmsg_flags&NLM_F_REQUEST))
-		return 0;
-
-	if (nlh->nlmsg_type != TCPDIAG_GETSOCK)
-		goto err_inval;
-
-	if (NLMSG_LENGTH(sizeof(struct tcpdiagreq)) > skb->len)
-		goto err_inval;
-
-	if (nlh->nlmsg_flags&NLM_F_DUMP) {
-		if (nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(struct tcpdiagreq))) {
-			struct rtattr *rta = (struct rtattr*)(NLMSG_DATA(nlh) + sizeof(struct tcpdiagreq));
-			if (rta->rta_type != TCPDIAG_REQ_BYTECODE ||
-			    rta->rta_len < 8 ||
-			    rta->rta_len > nlh->nlmsg_len - NLMSG_SPACE(sizeof(struct tcpdiagreq)))
-				goto err_inval;
-			if (tcpdiag_bc_audit(RTA_DATA(rta), RTA_PAYLOAD(rta)))
-				goto err_inval;
-		}
-		return netlink_dump_start(tcpnl, skb, nlh,
-					  tcpdiag_dump,
-					  tcpdiag_dump_done);
-	} else {
-		return tcpdiag_get_exact(skb, nlh);
-	}
-
-err_inval:
-	return -EINVAL;
-}
-
-
-static inline void tcpdiag_rcv_skb(struct sk_buff *skb)
-{
-	int err;
-	struct nlmsghdr * nlh;
-
-	if (skb->len >= NLMSG_SPACE(0)) {
-		nlh = (struct nlmsghdr *)skb->data;
-		if (nlh->nlmsg_len < sizeof(*nlh) || skb->len < nlh->nlmsg_len)
-			return;
-		err = tcpdiag_rcv_msg(skb, nlh);
-		if (err || nlh->nlmsg_flags & NLM_F_ACK) 
-			netlink_ack(skb, nlh, err);
-	}
-}
-
-static void tcpdiag_rcv(struct sock *sk, int len)
-{
-	struct sk_buff *skb;
-	unsigned int qlen = skb_queue_len(&sk->sk_receive_queue);
-
-	while (qlen-- && (skb = skb_dequeue(&sk->sk_receive_queue))) {
-		tcpdiag_rcv_skb(skb);
-		kfree_skb(skb);
-	}
-}
+static struct inet_diag_handler tcp_diag_handler = {
+	.idiag_hashinfo	 = &tcp_hashinfo,
+	.idiag_get_info	 = tcp_diag_get_info,
+	.idiag_type	 = TCPDIAG_GETSOCK,
+	.idiag_info_size = sizeof(struct tcp_info),
+};
 
-static int __init tcpdiag_init(void)
+static int __init tcp_diag_init(void)
 {
-	tcpnl = netlink_kernel_create(NETLINK_TCPDIAG, tcpdiag_rcv);
-	if (tcpnl == NULL)
-		return -ENOMEM;
-	return 0;
+	return inet_diag_register(&tcp_diag_handler);
 }
 
-static void __exit tcpdiag_exit(void)
+static void __exit tcp_diag_exit(void)
 {
-	sock_release(tcpnl->sk_socket);
+	inet_diag_unregister(&tcp_diag_handler);
 }
 
-module_init(tcpdiag_init);
-module_exit(tcpdiag_exit);
+module_init(tcp_diag_init);
+module_exit(tcp_diag_exit);
 MODULE_LICENSE("GPL");