Index: head/share/man/man4/siftr.4
===================================================================
--- head/share/man/man4/siftr.4
+++ head/share/man/man4/siftr.4
@@ -30,7 +30,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd November 12, 2010
+.Dd March 18, 2015
 .Dt SIFTR 4
 .Os
 .Sh NAME
@@ -335,6 +335,13 @@
 .It Va 26
 The current number of segments in the reassembly queue.
 .El
+.Bl -tag -offset indent -width Va
+.It Va 27
+Flowid for the connection.
+A caveat: Zero '0' either represents a valid flowid or a default value when it's
+not being set. There is no easy way to differentiate without looking at actual
+network interface card and drivers being used.
+.El
 .Pp
 The third type of log message is written to the file when the module is disabled
 and ceases collecting data from the running kernel.
Index: head/sys/netinet/siftr.c
===================================================================
--- head/sys/netinet/siftr.c
+++ head/sys/netinet/siftr.c
@@ -227,6 +227,8 @@
 	u_int			sent_inflight_bytes;
 	/* Number of segments currently in the reassembly queue. */
 	int			t_segqlen;
+	/* Flowid for the connection. */
+	u_int			flowid;	
 	/* Link to next pkt_node in the list. */
 	STAILQ_ENTRY(pkt_node)	nodes;
 };
@@ -485,7 +487,8 @@
 		    pkt_node->rcv_buf_hiwater,
 		    pkt_node->rcv_buf_cc,
 		    pkt_node->sent_inflight_bytes,
-		    pkt_node->t_segqlen);
+		    pkt_node->t_segqlen,
+		    pkt_node->flowid);
 	} else { /* IPv4 packet */
 		pkt_node->ip_laddr[0] = FIRST_OCTET(pkt_node->ip_laddr[3]);
 		pkt_node->ip_laddr[1] = SECOND_OCTET(pkt_node->ip_laddr[3]);
@@ -501,7 +504,7 @@
 		log_buf->ae_bytesused = snprintf(log_buf->ae_data,
 		    MAX_LOG_MSG_LEN,
 		    "%c,0x%08x,%jd.%06ld,%u.%u.%u.%u,%u,%u.%u.%u.%u,%u,%ld,%ld,"
-		    "%ld,%ld,%ld,%u,%u,%u,%u,%u,%u,%u,%d,%u,%u,%u,%u,%u,%u\n",
+		    "%ld,%ld,%ld,%u,%u,%u,%u,%u,%u,%u,%d,%u,%u,%u,%u,%u,%u,%u\n",
 		    direction[pkt_node->direction],
 		    pkt_node->hash,
 		    (intmax_t)pkt_node->tval.tv_sec,
@@ -534,7 +537,8 @@
 		    pkt_node->rcv_buf_hiwater,
 		    pkt_node->rcv_buf_cc,
 		    pkt_node->sent_inflight_bytes,
-		    pkt_node->t_segqlen);
+		    pkt_node->t_segqlen,
+		    pkt_node->flowid);
 #ifdef SIFTR_IPV6
 	}
 #endif
@@ -787,6 +791,7 @@
 	pn->rcv_buf_cc = sbused(&inp->inp_socket->so_rcv);
 	pn->sent_inflight_bytes = tp->snd_max - tp->snd_una;
 	pn->t_segqlen = tp->t_segqlen;
+	pn->flowid = inp->inp_flowid;
 
 	/* We've finished accessing the tcb so release the lock. */
 	if (inp_locally_locked)