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| author | Pavel Emelyanov <xemul@parallels.com> | 2011-12-09 06:24:06 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-12-09 14:15:00 -0500 |
| commit | a925aa00a55e3b72bd38bfdd3d6f97c0d900c949 (patch) | |
| tree | c3a713175d2fa0ea295bd20143bd9b0d938c2bb5 | |
| parent | 52b7c59bc34c1eb73c46e023c9c01231e1cb637a (diff) | |
| download | op-kernel-dev-a925aa00a55e3b72bd38bfdd3d6f97c0d900c949.zip op-kernel-dev-a925aa00a55e3b72bd38bfdd3d6f97c0d900c949.tar.gz | |
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>
| -rw-r--r-- | net/ipv4/udp_diag.c | 52 |
1 files changed, 51 insertions, 1 deletions
diff --git a/net/ipv4/udp_diag.c b/net/ipv4/udp_diag.c index 75e4e4a..caa164d 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, |
