inet: Reshuffle proto-level socket dumping

We'll support other tcp states and udp-specific info eventually.
This introduced switch() looks more friendly to this future.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

sk-inet.c

@@ -293,10 +293,14 @@ static int do_dump_one_inet_fd(int lfd, u32 id, const struct fd_parms *p, int fa
 	show_one_inet_img("Dumped", &ie);
 	sk->sd.already_dumped = 1;
 
-	if (tcp_connection(sk))
+	switch (sk->proto) {
+	case IPPROTO_TCP:
 		ret = dump_one_tcp(lfd, sk);
-	else
+		break;
+	default:
 		ret = 0;
+		break;
+	}
 err:
 	xfree(ie.src_addr);
 	xfree(ie.dst_addr);

sk-tcp.c

@@ -298,6 +298,9 @@ err_in:
 
 int dump_one_tcp(int fd, struct inet_sk_desc *sk)
 {
+	if (sk->state != TCP_ESTABLISHED)
+		return 0;
+
 	pr_info("Dumping TCP connection\n");
 
 	if (tcp_repair_establised(fd, sk))