svn commit: r327519 - stable/11/sys/netinet

[Steven Hartland]

Author: smh
Date: Wed Jan  3 15:01:31 2018
New Revision: 327519
URL: https://svnweb.freebsd.org/changeset/base/327519

Log:
  MFC r322812:
  
  Avoid TCP log messages which are false positives.
  
  Sponsored by:	Multiplay

Modified:
  stable/11/sys/netinet/tcp_input.c
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/netinet/tcp_input.c
==============================================================================
--- stable/11/sys/netinet/tcp_input.c	Wed Jan  3 12:18:55 2018	(r327518)
+++ stable/11/sys/netinet/tcp_input.c	Wed Jan  3 15:01:31 2018	(r327519)
@@ -1686,25 +1686,6 @@ tcp_do_segment(struct mbuf *m, struct tcphdr *th, stru
 			to.to_tsecr = 0;
 	}
 	/*
-	 * If timestamps were negotiated during SYN/ACK they should
-	 * appear on every segment during this session and vice versa.
-	 */
-	if ((tp->t_flags & TF_RCVD_TSTMP) && !(to.to_flags & TOF_TS)) {
-		if ((s = tcp_log_addrs(inc, th, NULL, NULL))) {
-			log(LOG_DEBUG, "%s; %s: Timestamp missing, "
-			    "no action\n", s, __func__);
-			free(s, M_TCPLOG);
-		}
-	}
-	if (!(tp->t_flags & TF_RCVD_TSTMP) && (to.to_flags & TOF_TS)) {
-		if ((s = tcp_log_addrs(inc, th, NULL, NULL))) {
-			log(LOG_DEBUG, "%s; %s: Timestamp not expected, "
-			    "no action\n", s, __func__);
-			free(s, M_TCPLOG);
-		}
-	}
-
-	/*
 	 * Process options only when we get SYN/ACK back. The SYN case
 	 * for incoming connections is handled in tcp_syncache.
 	 * According to RFC1323 the window field in a SYN (i.e., a <SYN>
@@ -1732,6 +1713,25 @@ tcp_do_segment(struct mbuf *m, struct tcphdr *th, stru
 		if ((tp->t_flags & TF_SACK_PERMIT) &&
 		    (to.to_flags & TOF_SACKPERM) == 0)
 			tp->t_flags &= ~TF_SACK_PERMIT;
+	}
+
+	/*
+	 * If timestamps were negotiated during SYN/ACK they should
+	 * appear on every segment during this session and vice versa.
+	 */
+	if ((tp->t_flags & TF_RCVD_TSTMP) && !(to.to_flags & TOF_TS)) {
+		if ((s = tcp_log_addrs(inc, th, NULL, NULL))) {
+			log(LOG_DEBUG, "%s; %s: Timestamp missing, "
+			    "no action\n", s, __func__);
+			free(s, M_TCPLOG);
+		}
+	}
+	if (!(tp->t_flags & TF_RCVD_TSTMP) && (to.to_flags & TOF_TS)) {
+		if ((s = tcp_log_addrs(inc, th, NULL, NULL))) {
+			log(LOG_DEBUG, "%s; %s: Timestamp not expected, "
+			    "no action\n", s, __func__);
+			free(s, M_TCPLOG);
+		}
 	}
 
 	/*