[TCP]: Format addresses appropriately in debug messages.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/tcp_input.c

@@ -2309,12 +2309,25 @@ static void DBGUNDO(struct sock *sk, const char *msg)
 	struct tcp_sock *tp = tcp_sk(sk);
 	struct inet_sock *inet = inet_sk(sk);
 
-	printk(KERN_DEBUG "Undo %s " NIPQUAD_FMT "/%u c%u l%u ss%u/%u p%u\n",
-	       msg,
-	       NIPQUAD(inet->daddr), ntohs(inet->dport),
-	       tp->snd_cwnd, tcp_left_out(tp),
-	       tp->snd_ssthresh, tp->prior_ssthresh,
-	       tp->packets_out);
+	if (sk->sk_family == AF_INET) {
+		printk(KERN_DEBUG "Undo %s " NIPQUAD_FMT "/%u c%u l%u ss%u/%u p%u\n",
+		       msg,
+		       NIPQUAD(inet->daddr), ntohs(inet->dport),
+		       tp->snd_cwnd, tcp_left_out(tp),
+		       tp->snd_ssthresh, tp->prior_ssthresh,
+		       tp->packets_out);
+	}
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	else if (sk->sk_family == AF_INET6) {
+		struct ipv6_pinfo *np = inet6_sk(sk);
+		printk(KERN_DEBUG "Undo %s " NIP6_FMT "/%u c%u l%u ss%u/%u p%u\n",
+		       msg,
+		       NIP6(np->daddr), ntohs(inet->dport),
+		       tp->snd_cwnd, tcp_left_out(tp),
+		       tp->snd_ssthresh, tp->prior_ssthresh,
+		       tp->packets_out);
+	}
+#endif
 }
 #else
 #define DBGUNDO(x...) do { } while (0)

net/ipv4/tcp_timer.c

@@ -299,12 +299,20 @@ static void tcp_retransmit_timer(struct sock *sk)
 		 * we cannot allow such beasts to hang infinitely.
 		 */
 #ifdef TCP_DEBUG
-		if (1) {
-			struct inet_sock *inet = inet_sk(sk);
+		struct inet_sock *inet = inet_sk(sk);
+		if (sk->sk_family == AF_INET) {
 			LIMIT_NETDEBUG(KERN_DEBUG "TCP: Treason uncloaked! Peer " NIPQUAD_FMT ":%u/%u shrinks window %u:%u. Repaired.\n",
 			       NIPQUAD(inet->daddr), ntohs(inet->dport),
 			       inet->num, tp->snd_una, tp->snd_nxt);
 		}
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+		else if (sk->sk_family == AF_INET6) {
+			struct ipv6_pinfo *np = inet6_sk(sk);
+			LIMIT_NETDEBUG(KERN_DEBUG "TCP: Treason uncloaked! Peer " NIP6_FMT ":%u/%u shrinks window %u:%u. Repaired.\n",
+			       NIP6(np->daddr), ntohs(inet->dport),
+			       inet->num, tp->snd_una, tp->snd_nxt);
+		}
+#endif
 #endif
 		if (tcp_time_stamp - tp->rcv_tstamp > TCP_RTO_MAX) {
 			tcp_write_err(sk);