Upgrade to tcpdump 4.7.4.

Bug: http://b/24902618
Change-Id: I7c3605015d90453b0a8c339b1774e285796f8775
diff --git a/tcp.h b/tcp.h
index 777118f..c18d138 100644
--- a/tcp.h
+++ b/tcp.h
@@ -1,4 +1,3 @@
-/* @(#) $Header: /tcpdump/master/tcpdump/tcp.h,v 1.14 2007-12-09 00:30:47 guy Exp $ (LBL) */
 /*
  * Copyright (c) 1982, 1986, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -34,21 +33,21 @@
  *	@(#)tcp.h	8.1 (Berkeley) 6/10/93
  */
 
-typedef	u_int32_t	tcp_seq;
+typedef	uint32_t	tcp_seq;
 /*
  * TCP header.
  * Per RFC 793, September, 1981.
  */
 struct tcphdr {
-	u_int16_t	th_sport;		/* source port */
-	u_int16_t	th_dport;		/* destination port */
+	uint16_t	th_sport;		/* source port */
+	uint16_t	th_dport;		/* destination port */
 	tcp_seq		th_seq;			/* sequence number */
 	tcp_seq		th_ack;			/* acknowledgement number */
-	u_int8_t	th_offx2;		/* data offset, rsvd */
-	u_int8_t	th_flags;
-	u_int16_t	th_win;			/* window */
-	u_int16_t	th_sum;			/* checksum */
-	u_int16_t	th_urp;			/* urgent pointer */
+	uint8_t		th_offx2;		/* data offset, rsvd */
+	uint8_t		th_flags;
+	uint16_t	th_win;			/* window */
+	uint16_t	th_sum;			/* checksum */
+	uint16_t	th_urp;			/* urgent pointer */
 } UNALIGNED;
 
 #define TH_OFF(th)	(((th)->th_offx2 & 0xf0) >> 4)
@@ -94,12 +93,18 @@
 #ifndef TELNET_PORT
 #define TELNET_PORT             23
 #endif
+#ifndef SMTP_PORT
+#define SMTP_PORT		25
+#endif
 #ifndef BGP_PORT
 #define BGP_PORT                179
 #endif
 #define NETBIOS_SSN_PORT        139
-#ifndef OPENFLOW_PORT
-#define OPENFLOW_PORT           6633
+#ifndef OPENFLOW_PORT_OLD
+#define OPENFLOW_PORT_OLD       6633
+#endif
+#ifndef OPENFLOW_PORT_IANA
+#define OPENFLOW_PORT_IANA      6653
 #endif
 #ifndef PPTP_PORT
 #define PPTP_PORT	        1723
@@ -114,3 +119,18 @@
 #ifndef SMB_PORT
 #define SMB_PORT                445
 #endif
+#ifndef HTTP_PORT
+#define HTTP_PORT		80
+#endif
+#ifndef HTTP_PORT_ALT
+#define HTTP_PORT_ALT		8080
+#endif
+#ifndef RTSP_PORT
+#define RTSP_PORT		554
+#endif
+#ifndef RTSP_PORT_ALT
+#define RTSP_PORT_ALT		8554
+#endif
+#ifndef FTP_PORT
+#define FTP_PORT		21
+#endif