Upgrade to tcpdump 4.9.0.

From CHANGES:

  Wednesday January 18, 2017 devel.fx.lebail@orange.fr
  Summary for 4.9.0 tcpdump release
    General updates:
    Improve separation frontend/backend (tcpdump/libnetdissect)
    Don't require IPv6 library support in order to support IPv6 addresses
    Introduce data types to use for integral values in packet structures
    Fix display of timestamps with -tt, -ttt and -ttttt options
    Fix some heap overflows found with American Fuzzy Lop by Hanno Boeck and others
        (More information in the log with CVE-2016-* and CVE-2017-*)
    Change the way protocols print link-layer addresses (Fix heap overflows
        in CALM-FAST and GeoNetworking printers)
    Pass correct caplen value to ether_print() and some other functions
    Fix lookup_nsap() to match what isonsap_string() expects
    Clean up relative time stamp printing (Fix an array overflow)
    Fix some alignment issues with GCC on Solaris 10 SPARC
    Add some ND_TTEST_/ND_TCHECK_ macros to simplify writing bounds checks
    Add a fn_printztn() which returns the number of bytes processed
    Add nd_init() and nd_cleanup() functions. Improve libsmi support
    Add CONTRIBUTING file
    Add a summary comment in all printers
    Compile with more warning options in devel mode if supported (-Wcast-qual, ...)
    Fix some leaks found by Valgrind/Memcheck
    Fix a bunch of de-constifications
    Squelch some Coverity warnings and some compiler warnings
    Update Coverity and Travis-CI setup
    Update Visual Studio files

    Frontend:
    Fix capsicum support to work with zerocopy buffers in bpf
    Try opening interfaces by name first, then by name-as-index
    Work around pcap_create() failures fetching time stamp type lists
    Fix a segmentation fault with 'tcpdump -J'
    Improve addrtostr6() bounds checking
    Add exit_tcpdump() function
    Don't drop CAP_SYS_CHROOT before chrooting
    Fixes issue where statistics not reported when -G and -W options used

    New printers supporting:
    Generic Protocol Extension for VXLAN (VXLAN-GPE)
    Home Networking Control Protocol (HNCP), RFCs 7787 and 7788
    Locator/Identifier Separation Protocol (LISP), type 3 and type 4 packets
    Marvell Extended Distributed Switch Architecture header (MEDSA)
    Network Service Header (NSH)
    REdis Serialization Protocol (RESP)

    Updated printers:
    802.11: Beginnings of 11ac radiotap support
    802.11: Check the Protected bit for management frames
    802.11: Do bounds checking on last_presentp before dereferencing it (Fix a heap overflow)
    802.11: Fix the radiotap printer to handle the special bits correctly
    802.11: If we have the MCS field, it's 11n
    802.11: Only print unknown frame type or subtype messages once
    802.11: Radiotap dBm values get printed as dB; Update a test output accordingly
    802.11: Source and destination addresses were backwards
    AH: Add a bounds check
    AH: Report to our caller that dissection failed if a bounds check fails
    AP1394: Print src > dst, not dst > src
    ARP: Don't assume the target hardware address is <= 6 octets long (Fix a heap overflow)
    ATALK: Add bounds and length checks (Fix heap overflows)
    ATM: Add some bounds checks (Fix a heap overflow)
    ATM: Fix an incorrect bounds check
    BFD: Update specification from draft to RFC 5880
    BFD: Update to print optional authentication field
    BGP: Add decoding of ADD-PATH capability
    BGP: Add support for the AIGP attribute (RFC7311)
    BGP: Print LARGE_COMMUNITY Path Attribute
    BGP: Update BGP numbers from IANA; Print minor values for FSM notification
    BOOTP: Add a bounds check
    Babel: Add decoder for source-specific extension
    CDP: Filter out non-printable characters
    CFM: Fixes to match the IEEE standard, additional bounds and length checks
    CSLIP: Add more bounds checks (Fix a heap overflow)
    ClassicalIPoATM: Add a bounds check on LLC+SNAP header (Fix a heap overflow)
    DHCP: Fix MUDURL and TZ options
    DHCPv6: Process MUDURL and TZ options
    DHCPv6: Update Status Codes with RFCs/IANA names
    DNS: Represent the "DNSSEC OK" bit as "DO" instead of "OK". Add a test case
    DTP: Improve packet integrity checks
    EGP: Fix bounds checks
    ESP: Don't use OpenSSL_add_all_algorithms() in OpenSSL 1.1.0 or later
    ESP: Handle OpenSSL 1.1.x
    Ethernet: Add some bounds checking before calling isoclns_print (Fix a heap overflow)
    Ethernet: Print the Length/Type field as length when needed
    FDDI: Fix -e output for FDDI
    FR: Add some packet-length checks and improve Q.933 printing (Fix heap overflows)
    GRE: Add some bounds checks (Fix heap overflows)
    Geneve: Fix error message with invalid option length; Update list option classes
    HNCP: Fix incorrect time interval format. Fix handling of IPv4 prefixes
    ICMP6: Fetch a 32-bit big-endian quantity with EXTRACT_32BITS()
    ICMP6: dagid is always an IPv6 address, not an opaque 128-bit string
    IGMP: Add a length check
    IP: Add a bounds check (Fix a heap overflow)
    IP: Check before fetching the protocol version (Fix a heap overflow)
    IP: Don't try to dissect if IP version != 4 (Fix a heap overflow)
    IP: Stop processing IPPROTO_ values once we hit IPPROTO_IPCOMP
    IPComp: Check whether we have the CPI before we fetch it (Fix a heap overflow)
    IPoFC: Fix -e output (IP-over-Fibre Channel)
    IPv6: Don't overwrite the destination IPv6 address for routing headers
    IPv6: Fix header printing
    IPv6: Stop processing IPPROTO_ values once we hit IPPROTO_IPCOMP
    ISAKMP: Clean up parsing of IKEv2 Security Associations
    ISOCLNS/IS-IS: Add support for Purge Originator Identifier (RFC6232) and test cases
    ISOCLNS/IS-IS: Don't overwrite packet data when checking the signature
    ISOCLNS/IS-IS: Filter out non-printable characters
    ISOCLNS/IS-IS: Fix segmentation faults
    ISOCLNS/IS-IS: Have signature_verify() do the copying and clearing
    ISOCLNS: Add some bounds checks
    Juniper: Make sure a Juniper header TLV isn't bigger than what's left in the packet (Fix a heap overflow)
    LLC/SNAP: With -e, print the LLC header before the SNAP header; without it, cut the SNAP header
    LLC: Add a bounds check (Fix a heap overflow)
    LLC: Clean up printing of LLC packets
    LLC: Fix the printing of RFC 948-style IP packets
    LLC: Skip the LLC and SNAP headers with -x for 802.11 and some other protocols
    LLDP: Implement IANA OUI and LLDP MUD option
    MPLS LSP ping: Update printing for RFC 4379, bug fixes, more bounds checks
    MPLS: "length" is now the *remaining* packet length
    MPLS: Add bounds and length checks (Fix a heap overflow)
    NFS: Add a test that makes unaligned accesses
    NFS: Don't assume the ONC RPC header is nicely aligned
    NFS: Don't overflow the Opaque_Handle buffer (Fix a segmentation fault)
    NFS: Don't run past the end of an NFSv3 file handle
    OLSR: Add a test to cover a HNA sgw case
    OLSR: Fix 'Advertised networks' count
    OLSR: Fix printing of smart-gateway HNAs in IPv4
    OSPF: Add a bounds check for the Hello packet options
    OSPF: Do more bounds checking
    OSPF: Fix a segmentation fault
    OSPF: Fix printing 'ospf_topology_values' default
    OTV: Add missing bounds checks
    PGM: Print the formatted IP address, not the raw binary address, as a string
    PIM: Add some bounds checking (Fix a heap overflow)
    PIMv2: Fix checksumming of Register messages
    PPI: Pass an adjusted struct pcap_pkthdr to the sub-printer
    PPP: Add some bounds checks (Fix a heap overflow)
    PPP: Report invalid PAP AACK/ANAK packets
    Q.933: Add a missing bounds check
    RADIUS: Add Value 13 "VLAN" to Tunnel-Type attribute
    RADIUS: Filter out non-printable characters
    RADIUS: Translate UDP/1700 as RADIUS
    RESP: Do better checking of RESP packets
    RPKI-RTR: Add a return value check for "fn_printn" call
    RPKI-RTR: Remove printing when truncated condition already detected
    RPL: Fix 'Consistency Check' control code
    RPL: Fix suboption print
    RSVP: An INTEGRITY object in a submessage covers only the submessage
    RSVP: Fix an infinite loop; Add bounds and length checks
    RSVP: Fix some if statements missing brackets
    RSVP: Have signature_verify() do the copying and clearing
    RTCP: Add some bounds checks
    RTP: Add some bounds checks, fix two segmentation faults
    SCTP: Do more bounds checking
    SFLOW: Fix bounds checking
    SLOW: Fix bugs, add checks
    SMB: Before fetching the flags2 field, make sure we have it
    SMB: Do bounds checks on NBNS resource types and resource data lengths
    SNMP: Clean up the "have libsmi but no modules loaded" case
    SNMP: Clean up the object abbreviation list and fix the code to match them
    SNMP: Do bounds checks when printing character and octet strings
    SNMP: Improve ASN.1 bounds checks
    SNMP: More bounds and length checks
    STP: Add a bunch of bounds checks, and fix some printing (Fix heap overflows)
    STP: Filter out non-printable characters
    TCP: Add bounds and length checks for packets with TCP option 20
    TCP: Correct TCP option Kind value for TCP Auth and add SCPS-TP
    TCP: Fix two bounds checks (Fix heap overflows)
    TCP: Make sure we have the data offset field before fetching it (Fix a heap overflow)
    TCP: Put TCP-AO option decoding right
    TFTP: Don't use strchr() to scan packet data (Fix a heap overflow)
    Telnet: Add some bounds checks
    TokenRing: Fix -e output
    UDLD: Fix an infinite loop
    UDP: Add a bounds check (Fix a heap overflow)
    UDP: Check against the packet length first
    UDP: Don't do the DDP-over-UDP heuristic check up front
    VAT: Add some bounds checks
    VTP: Add a test on Mgmt Domain Name length
    VTP: Add bounds checks and filter out non-printable characters
    VXLAN: Add a bound check and a test case
    ZeroMQ: Fix an infinite loop

  Tuesday April 14, 2015 guy@alum.mit.edu
  Summary for 4.8.0 tcpdump release
        Fix "-x" for Apple PKTAP and PPI packets

Bug: N/A
Test: "adb shell tcpdump"
Change-Id: I81df72cf1ebdbe61c5b6069d8532ae817570f23f
diff --git a/print-nfs.c b/print-nfs.c
index dd2f7f1..a71e068 100644
--- a/print-nfs.c
+++ b/print-nfs.c
@@ -19,17 +19,18 @@
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
 
-#define NETDISSECT_REWORKED
+/* \summary: Network File System (NFS) printer */
+
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
-#include <tcpdump-stdinc.h>
+#include <netdissect-stdinc.h>
 
 #include <stdio.h>
 #include <string.h>
 
-#include "interface.h"
+#include "netdissect.h"
 #include "addrtoname.h"
 #include "extract.h"
 
@@ -37,9 +38,7 @@
 #include "nfsfh.h"
 
 #include "ip.h"
-#ifdef INET6
 #include "ip6.h"
-#endif
 #include "rpc_auth.h"
 #include "rpc_msg.h"
 
@@ -55,7 +54,7 @@
 /*
  * Mapping of old NFS Version 2 RPC numbers to generic numbers.
  */
-uint32_t nfsv3_procid[NFS_NPROCS] = {
+static uint32_t nfsv3_procid[NFS_NPROCS] = {
 	NFSPROC_NULL,
 	NFSPROC_GETATTR,
 	NFSPROC_SETATTR,
@@ -203,33 +202,24 @@
 print_nfsaddr(netdissect_options *ndo,
               const u_char *bp, const char *s, const char *d)
 {
-	struct ip *ip;
-#ifdef INET6
-	struct ip6_hdr *ip6;
+	const struct ip *ip;
+	const struct ip6_hdr *ip6;
 	char srcaddr[INET6_ADDRSTRLEN], dstaddr[INET6_ADDRSTRLEN];
-#else
-#ifndef INET_ADDRSTRLEN
-#define INET_ADDRSTRLEN	16
-#endif
-	char srcaddr[INET_ADDRSTRLEN], dstaddr[INET_ADDRSTRLEN];
-#endif
 
 	srcaddr[0] = dstaddr[0] = '\0';
-	switch (IP_V((struct ip *)bp)) {
+	switch (IP_V((const struct ip *)bp)) {
 	case 4:
-		ip = (struct ip *)bp;
+		ip = (const struct ip *)bp;
 		strlcpy(srcaddr, ipaddr_string(ndo, &ip->ip_src), sizeof(srcaddr));
 		strlcpy(dstaddr, ipaddr_string(ndo, &ip->ip_dst), sizeof(dstaddr));
 		break;
-#ifdef INET6
 	case 6:
-		ip6 = (struct ip6_hdr *)bp;
+		ip6 = (const struct ip6_hdr *)bp;
 		strlcpy(srcaddr, ip6addr_string(ndo, &ip6->ip6_src),
 		    sizeof(srcaddr));
 		strlcpy(dstaddr, ip6addr_string(ndo, &ip6->ip6_dst),
 		    sizeof(dstaddr));
 		break;
-#endif
 	default:
 		strlcpy(srcaddr, "?", sizeof(srcaddr));
 		strlcpy(dstaddr, "?", sizeof(dstaddr));
@@ -434,7 +424,7 @@
 	/*
 	 * find the start of the req data (if we captured it)
 	 */
-	dp = (uint32_t *)&rp->rm_call.cb_cred;
+	dp = (const uint32_t *)&rp->rm_call.cb_cred;
 	ND_TCHECK(dp[1]);
 	len = EXTRACT_32BITS(&dp[1]);
 	if (len < length) {
@@ -496,7 +486,7 @@
 
 	ND_TCHECK2(*dp, ((len + 3) & ~3));
 
-	cp = (u_char *)dp;
+	cp = (const u_char *)dp;
 	/* Update 32-bit pointer (NFS filenames padded to 32-bit boundaries) */
 	dp += ((len + 3) & ~3) / sizeof(*dp);
 	ND_PRINT((ndo, "\""));
@@ -663,12 +653,12 @@
 		break;
 
 	case NFSPROC_SYMLINK:
-		if ((dp = parsereq(ndo, rp, length)) != 0 &&
-		    (dp = parsefhn(ndo, dp, v3)) != 0) {
+		if ((dp = parsereq(ndo, rp, length)) != NULL &&
+		    (dp = parsefhn(ndo, dp, v3)) != NULL) {
 			ND_PRINT((ndo, " ->"));
-			if (v3 && (dp = parse_sattr3(ndo, dp, &sa3)) == 0)
+			if (v3 && (dp = parse_sattr3(ndo, dp, &sa3)) == NULL)
 				break;
-			if (parsefn(ndo, dp) == 0)
+			if (parsefn(ndo, dp) == NULL)
 				break;
 			if (v3 && ndo->ndo_vflag)
 				print_sattr3(ndo, &sa3, ndo->ndo_vflag);
@@ -677,12 +667,12 @@
 		break;
 
 	case NFSPROC_MKNOD:
-		if ((dp = parsereq(ndo, rp, length)) != 0 &&
-		    (dp = parsefhn(ndo, dp, v3)) != 0) {
+		if ((dp = parsereq(ndo, rp, length)) != NULL &&
+		    (dp = parsefhn(ndo, dp, v3)) != NULL) {
 			ND_TCHECK(*dp);
 			type = (nfs_type)EXTRACT_32BITS(dp);
 			dp++;
-			if ((dp = parse_sattr3(ndo, dp, &sa3)) == 0)
+			if ((dp = parse_sattr3(ndo, dp, &sa3)) == NULL)
 				break;
 			ND_PRINT((ndo, " %s", tok2str(type2str, "unk-ft %d", type)));
 			if (ndo->ndo_vflag && (type == NFCHR || type == NFBLK)) {
@@ -851,13 +841,8 @@
 struct xid_map_entry {
 	uint32_t	xid;		/* transaction ID (net order) */
 	int ipver;			/* IP version (4 or 6) */
-#ifdef INET6
 	struct in6_addr	client;		/* client IP address (net order) */
 	struct in6_addr	server;		/* server IP address (net order) */
-#else
-	struct in_addr	client;		/* client IP address (net order) */
-	struct in_addr	server;		/* server IP address (net order) */
-#endif
 	uint32_t	proc;		/* call proc number (host order) */
 	uint32_t	vers;		/* program version (host order) */
 };
@@ -870,32 +855,28 @@
 
 #define	XIDMAPSIZE	64
 
-struct xid_map_entry xid_map[XIDMAPSIZE];
+static struct xid_map_entry xid_map[XIDMAPSIZE];
 
-int	xid_map_next = 0;
-int	xid_map_hint = 0;
+static int xid_map_next = 0;
+static int xid_map_hint = 0;
 
 static int
 xid_map_enter(netdissect_options *ndo,
               const struct sunrpc_msg *rp, const u_char *bp)
 {
-	struct ip *ip = NULL;
-#ifdef INET6
-	struct ip6_hdr *ip6 = NULL;
-#endif
+	const struct ip *ip = NULL;
+	const struct ip6_hdr *ip6 = NULL;
 	struct xid_map_entry *xmep;
 
 	if (!ND_TTEST(rp->rm_call.cb_vers))
 		return (0);
-	switch (IP_V((struct ip *)bp)) {
+	switch (IP_V((const struct ip *)bp)) {
 	case 4:
-		ip = (struct ip *)bp;
+		ip = (const struct ip *)bp;
 		break;
-#ifdef INET6
 	case 6:
-		ip6 = (struct ip6_hdr *)bp;
+		ip6 = (const struct ip6_hdr *)bp;
 		break;
-#endif
 	default:
 		return (1);
 	}
@@ -911,13 +892,11 @@
 		UNALIGNED_MEMCPY(&xmep->client, &ip->ip_src, sizeof(ip->ip_src));
 		UNALIGNED_MEMCPY(&xmep->server, &ip->ip_dst, sizeof(ip->ip_dst));
 	}
-#ifdef INET6
 	else if (ip6) {
 		xmep->ipver = 6;
 		UNALIGNED_MEMCPY(&xmep->client, &ip6->ip6_src, sizeof(ip6->ip6_src));
 		UNALIGNED_MEMCPY(&xmep->server, &ip6->ip6_dst, sizeof(ip6->ip6_dst));
 	}
-#endif
 	xmep->proc = EXTRACT_32BITS(&rp->rm_call.cb_proc);
 	xmep->vers = EXTRACT_32BITS(&rp->rm_call.cb_vers);
 	return (1);
@@ -933,13 +912,12 @@
 {
 	int i;
 	struct xid_map_entry *xmep;
-	uint32_t xid = rp->rm_xid;
-	struct ip *ip = (struct ip *)bp;
-#ifdef INET6
-	struct ip6_hdr *ip6 = (struct ip6_hdr *)bp;
-#endif
+	uint32_t xid;
+	const struct ip *ip = (const struct ip *)bp;
+	const struct ip6_hdr *ip6 = (const struct ip6_hdr *)bp;
 	int cmp;
 
+	UNALIGNED_MEMCPY(&xid, &rp->rm_xid, sizeof(xmep->xid));
 	/* Start searching from where we last left off */
 	i = xid_map_hint;
 	do {
@@ -956,7 +934,6 @@
 				cmp = 0;
 			}
 			break;
-#ifdef INET6
 		case 6:
 			if (UNALIGNED_MEMCMP(&ip6->ip6_src, &xmep->server,
 				   sizeof(ip6->ip6_src)) != 0 ||
@@ -965,7 +942,6 @@
 				cmp = 0;
 			}
 			break;
-#endif
 		default:
 			cmp = 0;
 			break;
@@ -1039,7 +1015,7 @@
 	}
 	/* successful return */
 	ND_TCHECK2(*dp, sizeof(astat));
-	return ((uint32_t *) (sizeof(astat) + ((char *)dp)));
+	return ((const uint32_t *) (sizeof(astat) + ((const char *)dp)));
 trunc:
 	return (0);
 }
@@ -1084,7 +1060,7 @@
 		if (v3) {
 			ND_TCHECK(fap->fa3_size);
 			ND_PRINT((ndo, " sz %" PRIu64,
-				EXTRACT_64BITS((uint32_t *)&fap->fa3_size)));
+				EXTRACT_64BITS((const uint32_t *)&fap->fa3_size)));
 		} else {
 			ND_TCHECK(fap->fa2_size);
 			ND_PRINT((ndo, " sz %d", EXTRACT_32BITS(&fap->fa2_size)));
@@ -1099,9 +1075,9 @@
 			       EXTRACT_32BITS(&fap->fa3_rdev.specdata1),
 			       EXTRACT_32BITS(&fap->fa3_rdev.specdata2)));
 			ND_PRINT((ndo, " fsid %" PRIx64,
-				EXTRACT_64BITS((uint32_t *)&fap->fa3_fsid)));
+				EXTRACT_64BITS((const uint32_t *)&fap->fa3_fsid)));
 			ND_PRINT((ndo, " fileid %" PRIx64,
-				EXTRACT_64BITS((uint32_t *)&fap->fa3_fileid)));
+				EXTRACT_64BITS((const uint32_t *)&fap->fa3_fileid)));
 			ND_PRINT((ndo, " a/m/ctime %u.%06u",
 			       EXTRACT_32BITS(&fap->fa3_atime.nfsv3_sec),
 			       EXTRACT_32BITS(&fap->fa3_atime.nfsv3_nsec)));
@@ -1129,7 +1105,7 @@
 			       EXTRACT_32BITS(&fap->fa2_ctime.nfsv2_usec)));
 		}
 	}
-	return ((const uint32_t *)((unsigned char *)dp +
+	return ((const uint32_t *)((const unsigned char *)dp +
 		(v3 ? NFSX_V3FATTR : NFSX_V2FATTR)));
 trunc:
 	return (NULL);
@@ -1214,14 +1190,14 @@
 
 	if (v3) {
 		ND_PRINT((ndo, " tbytes %" PRIu64 " fbytes %" PRIu64 " abytes %" PRIu64,
-			EXTRACT_64BITS((uint32_t *)&sfsp->sf_tbytes),
-			EXTRACT_64BITS((uint32_t *)&sfsp->sf_fbytes),
-			EXTRACT_64BITS((uint32_t *)&sfsp->sf_abytes)));
+			EXTRACT_64BITS((const uint32_t *)&sfsp->sf_tbytes),
+			EXTRACT_64BITS((const uint32_t *)&sfsp->sf_fbytes),
+			EXTRACT_64BITS((const uint32_t *)&sfsp->sf_abytes)));
 		if (ndo->ndo_vflag) {
 			ND_PRINT((ndo, " tfiles %" PRIu64 " ffiles %" PRIu64 " afiles %" PRIu64 " invar %u",
-			       EXTRACT_64BITS((uint32_t *)&sfsp->sf_tfiles),
-			       EXTRACT_64BITS((uint32_t *)&sfsp->sf_ffiles),
-			       EXTRACT_64BITS((uint32_t *)&sfsp->sf_afiles),
+			       EXTRACT_64BITS((const uint32_t *)&sfsp->sf_tfiles),
+			       EXTRACT_64BITS((const uint32_t *)&sfsp->sf_ffiles),
+			       EXTRACT_64BITS((const uint32_t *)&sfsp->sf_afiles),
 			       EXTRACT_32BITS(&sfsp->sf_invarsec)));
 		}
 	} else {
@@ -1368,7 +1344,7 @@
 
 	if (!(dp = parsestatus(ndo, dp, &er)))
 		return (0);
-	return parse_wcc_data(ndo, dp, verbose) != 0;
+	return parse_wcc_data(ndo, dp, verbose) != NULL;
 }
 
 static const uint32_t *
@@ -1399,7 +1375,7 @@
 parsefsinfo(netdissect_options *ndo,
             const uint32_t *dp)
 {
-	struct nfsv3_fsinfo *sfp;
+	const struct nfsv3_fsinfo *sfp;
 	int er;
 
 	if (!(dp = parsestatus(ndo, dp, &er)))
@@ -1411,7 +1387,7 @@
 	if (er)
 		return (1);
 
-	sfp = (struct nfsv3_fsinfo *)dp;
+	sfp = (const struct nfsv3_fsinfo *)dp;
 	ND_TCHECK(*sfp);
 	ND_PRINT((ndo, " rtmax %u rtpref %u wtmax %u wtpref %u dtpref %u",
 	       EXTRACT_32BITS(&sfp->fs_rtmax),
@@ -1423,7 +1399,7 @@
 		ND_PRINT((ndo, " rtmult %u wtmult %u maxfsz %" PRIu64,
 		       EXTRACT_32BITS(&sfp->fs_rtmult),
 		       EXTRACT_32BITS(&sfp->fs_wtmult),
-		       EXTRACT_64BITS((uint32_t *)&sfp->fs_maxfilesize)));
+		       EXTRACT_64BITS((const uint32_t *)&sfp->fs_maxfilesize)));
 		ND_PRINT((ndo, " delta %u.%06u ",
 		       EXTRACT_32BITS(&sfp->fs_timedelta.nfsv3_sec),
 		       EXTRACT_32BITS(&sfp->fs_timedelta.nfsv3_nsec)));
@@ -1438,7 +1414,7 @@
               const uint32_t *dp)
 {
 	int er;
-	struct nfsv3_pathconf *spp;
+	const struct nfsv3_pathconf *spp;
 
 	if (!(dp = parsestatus(ndo, dp, &er)))
 		return (0);
@@ -1449,7 +1425,7 @@
 	if (er)
 		return (1);
 
-	spp = (struct nfsv3_pathconf *)dp;
+	spp = (const struct nfsv3_pathconf *)dp;
 	ND_TCHECK(*spp);
 
 	ND_PRINT((ndo, " linkmax %u namemax %u %s %s %s %s",
@@ -1600,7 +1576,7 @@
 		if (!(dp = parserep(ndo, rp, length)))
 			break;
 		if (v3) {
-			if (parsecreateopres(ndo, dp, ndo->ndo_vflag) != 0)
+			if (parsecreateopres(ndo, dp, ndo->ndo_vflag) != NULL)
 				return;
 		} else {
 			if (parsediropres(ndo, dp) != 0)
@@ -1612,10 +1588,10 @@
 		if (!(dp = parserep(ndo, rp, length)))
 			break;
 		if (v3) {
-			if (parsecreateopres(ndo, dp, ndo->ndo_vflag) != 0)
+			if (parsecreateopres(ndo, dp, ndo->ndo_vflag) != NULL)
 				return;
 		} else {
-			if (parsestatus(ndo, dp, &er) != 0)
+			if (parsestatus(ndo, dp, &er) != NULL)
 				return;
 		}
 		break;
@@ -1623,7 +1599,7 @@
 	case NFSPROC_MKNOD:
 		if (!(dp = parserep(ndo, rp, length)))
 			break;
-		if (parsecreateopres(ndo, dp, ndo->ndo_vflag) != 0)
+		if (parsecreateopres(ndo, dp, ndo->ndo_vflag) != NULL)
 			return;
 		break;
 
@@ -1635,7 +1611,7 @@
 			if (parsewccres(ndo, dp, ndo->ndo_vflag))
 				return;
 		} else {
-			if (parsestatus(ndo, dp, &er) != 0)
+			if (parsestatus(ndo, dp, &er) != NULL)
 				return;
 		}
 		break;
@@ -1656,7 +1632,7 @@
 			}
 			return;
 		} else {
-			if (parsestatus(ndo, dp, &er) != 0)
+			if (parsestatus(ndo, dp, &er) != NULL)
 				return;
 		}
 		break;
@@ -1677,7 +1653,7 @@
 				return;
 			}
 		} else {
-			if (parsestatus(ndo, dp, &er) != 0)
+			if (parsestatus(ndo, dp, &er) != NULL)
 				return;
 		}
 		break;