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Commit a925aa00 authored by Pavel Emelyanov's avatar Pavel Emelyanov Committed by David S. Miller
Browse files

udp_diag: Implement the get_exact dumping functionality 



Do the same as TCP does -- lookup a socket in the given udp_table,
check cookie, fill the reply message with existing inet socket dumping
helper and send one back.

Signed-off-by: default avatarPavel Emelyanov <xemul@parallels.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 52b7c59b

net/ipv4/udp_diag.c

+51 −1
Original line number Diff line number Diff line
@@ -21,7 +21,57 @@ 
static int udp_dump_one(struct udp_table *tbl, struct sk_buff *in_skb,

		const struct nlmsghdr *nlh, struct inet_diag_req *req)

{

	return 0;

	int err = -EINVAL;

	struct sock *sk;

	struct sk_buff *rep;



	if (req->sdiag_family == AF_INET)

		sk = __udp4_lib_lookup(&init_net,

				req->id.idiag_src[0], req->id.idiag_sport,

				req->id.idiag_dst[0], req->id.idiag_dport,

				req->id.idiag_if, tbl);

	else if (req->sdiag_family == AF_INET6)

		sk = __udp6_lib_lookup(&init_net,

				(struct in6_addr *)req->id.idiag_src,

				req->id.idiag_sport,

				(struct in6_addr *)req->id.idiag_dst,

				req->id.idiag_dport,

				req->id.idiag_if, tbl);

	else

		goto out_nosk;



	err = -ENOENT;

	if (sk == NULL)

		goto out_nosk;



	err = inet_diag_check_cookie(sk, req);

	if (err)

		goto out;



	err = -ENOMEM;

	rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) +

				     sizeof(struct inet_diag_meminfo) +

				     64)), GFP_KERNEL);

	if (!rep)

		goto out;



	err = inet_sk_diag_fill(sk, NULL, rep, req,

			   NETLINK_CB(in_skb).pid,

			   nlh->nlmsg_seq, 0, nlh);

	if (err < 0) {

		WARN_ON(err == -EMSGSIZE);

		kfree_skb(rep);

		goto out;

	}

	err = netlink_unicast(sock_diag_nlsk, rep, NETLINK_CB(in_skb).pid,

			      MSG_DONTWAIT);

	if (err > 0)

		err = 0;

out:

	if (sk)

		sock_put(sk);

out_nosk:

	return err;

}



static void udp_dump(struct udp_table *table, struct sk_buff *skb, struct netlink_callback *cb,