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authorPavel Emelyanov <xemul@parallels.com>2011-12-09 06:24:06 +0000
committerDavid S. Miller <davem@davemloft.net>2011-12-09 14:15:00 -0500
commita925aa00a55e3b72bd38bfdd3d6f97c0d900c949 (patch)
treec3a713175d2fa0ea295bd20143bd9b0d938c2bb5 /net/ipv4/udp_diag.c
parent52b7c59bc34c1eb73c46e023c9c01231e1cb637a (diff)
downloadlinux-a925aa00a55e3b72bd38bfdd3d6f97c0d900c949.tar.bz2
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: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/udp_diag.c')
-rw-r--r--net/ipv4/udp_diag.c52
1 files changed, 51 insertions, 1 deletions
diff --git a/net/ipv4/udp_diag.c b/net/ipv4/udp_diag.c
index 75e4e4ada545..caa164dcd30f 100644
--- a/net/ipv4/udp_diag.c
+++ b/net/ipv4/udp_diag.c
@@ -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,