- make command line argument parsing POSIX compliant. comment from

  deraadt NOTE: -I needs to take an arg (there's no way we can take no
  arg/an arg with a single option)
- sscanf overrun
- no variable name on prototype.
- u_int32_t may not be u_long.
- skipped non-host route when printing neighbor cache entries.
- valid and preferred lifetimes are unsigned.
- wording.

Obtained from:	KAME

2 files changed, 281 insertions, 182 deletions

diff --git a/usr.sbin/ndp/ndp.8 b/usr.sbin/ndp/ndp.8
index e9b75dd..c74e139 100644
--- a/usr.sbin/ndp/ndp.8
+++ b/usr.sbin/ndp/ndp.8
@@ -1,5 +1,5 @@
 .\"	$FreeBSD$
-.\"	$KAME: ndp.8,v 1.15 2001/02/08 07:17:03 itojun Exp $
+.\"	$KAME: ndp.8,v 1.28 2002/07/17 08:46:33 itojun Exp $
 .\"
 .\" Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
 .\" All rights reserved.
@@ -37,60 +37,97 @@
 .Nd control/diagnose IPv6 neighbor discovery protocol
 .\"
 .Sh SYNOPSIS
-.Nm
-.Fl a
+.Nm ndp
 .Op Fl nt
-.Nm
-.Fl A Ar wait
+.Ar hostname
+.Nm ndp
 .Op Fl nt
-.Nm
-.Fl c
+.Fl a | Fl c | Fl p
+.Nm ndp
 .Op Fl nt
-.Nm
-.Fl d
+.Fl r
+.Nm ndp
 .Op Fl nt
-.Ar hostname
-.Nm
-.Fl f
+.Fl H | Fl P | Fl R
+.Nm ndp
+.Op Fl nt
+.Fl A Ar wait
+.Nm ndp
+.Op Fl nt
+.Fl d Ar hostname
+.Nm ndp
+.Op Fl nt
+.Fl f Ar filename
+.Nm ndp
 .Op Fl nt
-.Ar filename
-.Nm
-.Fl H
-.Nm
-.Fl I
-.Op Cm delete | Ar interface
-.Nm
 .Fl i
 .Ar interface
-.Op Ar flags...
-.Nm
-.Fl p
-.Nm
-.Fl P
-.Nm
-.Fl r
-.Nm
-.Fl R
-.Nm
-.Fl s
+.Op Ar flags ...
+.Nm ndp
 .Op Fl nt
-.Ar nodename
-.Ar ether_addr
+.Fl I Op Ar interface | Li delete
+.Nm ndp
+.Op Fl nt
+.Fl s Ar nodename etheraddr
 .Op Li temp
 .Op Li proxy
 .\"
 .Sh DESCRIPTION
 The
 .Nm
-utility manipulates the address mapping table
-used by Neighbor Discovery Protocol (NDP).
+command manipulates the address mapping table
+used by the Neighbor Discovery Protocol (NDP).
 .Bl -tag -width Ds
 .It Fl a
 Dump the currently existing NDP entries.
+The following information will be printed:
+.Bl -tag -width NeighborXX
+.It Neighbor
+IPv6 address of the neighbor.
+.It Linklayer Address
+Linklayer address of the neighbor.
+It could be
+.Dq Li (incomplete)
+when the address is not available.
+.It Netif
+Network interface associated with the neighbor cache entry.
+.It Expire
+The time until expiry of the entry.
+The entry could become
+.Dq Li permanent ,
+in which case it will never expire.
+.It S
+State of the neighbor cache entry, as a single letter:
+.Pp
+.Bl -tag -width indent -compact
+.It N
+Nostate
+.It W
+Waitdelete
+.It I
+Incomplete
+.It R
+Reachable
+.It S
+Stale
+.It D
+Delay
+.It P
+Probe
+.It ?
+Unknown state (should never happen).
+.El
+.It Flags
+Flags on the neighbor cache entry, in a single letter.
+They are: Router, proxy neighbor advertisement
+.Pq Dq p .
+The field could be followed by a decimal number,
+which means the number of NS probes the node has sent during the current state.
+.El
 .It Fl A Ar wait
 Repeat
 .Fl a
-(dump NDP entries)
+.Pq dump NDP entries
 every
 .Ar wait
 seconds.
@@ -104,35 +141,42 @@ Parse the file specified by
 .It Fl H
 Harmonize consistency between the routing table and the default router
 list; install the top entry of the list into the kernel routing table.
-.It Fl I Op Cm delete | Ar interface
-Shows or specifies the default interface used as the default route when
+.It Fl I
+Shows the default interface used as the default route when
+there is no default router.
+.It Fl I Ar interface
+Specifies the default interface used as the default route when
 there is no default router.
-If no argument is given to the option,
-the current default interface will be shown.
-If an
+The 
 .Ar interface
-is specified, the interface will be used as the default.
-If a special keyword
-.Ic delete
-is specified, the current default interface will be deleted from the kernel.
-.It Fl i Ar interface Op Ar flags...
+will be used as the default.
+.It Fl I Li delete
+The current default interface will be deleted from the kernel.
+.It Fl i Ar interface Op Ar flags ...
 View ND information for the specified interface.
 If additional arguments
 .Ar flags
 are given,
 .Nm
 sets or clears the specified flags for the interface.
+Each flag should be separated by white spaces or tab characters.
 Possible flags are as follows.
 All of the flags can begin with the
 special character
 .Ql - ,
 which means the flag should be cleared.
+Note that you need
+.Fl -
+before
+.Fl foo
+in this case.
 .\"
+.Pp
 .Bl -tag -width Ds -compact
 .It Xo
 .Ic nud
 .Xc
-turn on or off NUD (Neighbor Unreachability Detection) on the
+Turn on or off NUD (Neighbor Unreachability Detection) on the
 interface.
 NUD is usually turned on by default.
 .It Xo
@@ -146,9 +190,20 @@ unless the
 .Li net.inet6.ip6.accept_rtadv
 variable is non-0, even if the flag is on.
 This flag is set to 1 by default.
+.It Xo
+.Ic prefer_source
+.Xc
+Prefer addresses on the
+.Ar interface
+as candidates of the source address for outgoing packets.
+The default value of this flag is off.
+For more details about the entire algorithm of source address
+selection, see the
+.Pa IMPLEMENTATION
+file supplied with the KAME kit.
 .El
 .It Fl n
-Do not try to resolve numeric address to hostname.
+Do not try to resolve numeric addresses to hostnames.
 .It Fl p
 Show prefix list.
 .It Fl P
@@ -158,20 +213,20 @@ Show default router list.
 .It Fl R
 Flush all the entries in the default router list.
 .It Fl s
-Register an NDP entry for a node.
+Register a NDP entry for a node.
 The entry will be permanent unless the word
 .Li temp
 is given in the command.
 If the word
 .Li proxy
-is given, this system will act as a proxy NDP server,
+is given, this system will act as an proxy NDP server,
 responding to requests for
 .Ar hostname
 even though the host address is not its own.
 .It Fl t
-Print timestamp on each entries,
-to make it possible to merge output with
-.Xr tcpdump 1 .
+Print timestamp on each entry,
+making it possible to merge output with
+.Xr tcpdump 8 .
 Most useful when used with
 .Fl A .
 .El
@@ -179,7 +234,7 @@ Most useful when used with
 .Sh RETURN VALUES
 The
 .Nm
-utility will exit with 0 on success, and non-zero on errors.
+command will exit with 0 on success, and non-zero on errors.
 .\"
 .Sh SEE ALSO
 .Xr arp 8
@@ -187,7 +242,7 @@ utility will exit with 0 on success, and non-zero on errors.
 .Sh HISTORY
 The
 .Nm
-utility first appeared in WIDE Hydrangea IPv6 protocol stack kit.
+command first appeared in the WIDE Hydrangea IPv6 protocol stack kit.
 .\"
 .\" .Sh BUGS
 .\" (to be written)
diff --git a/usr.sbin/ndp/ndp.c b/usr.sbin/ndp/ndp.c
index bd55ef7..a761f96 100644
--- a/usr.sbin/ndp/ndp.c
+++ b/usr.sbin/ndp/ndp.c
@@ -1,5 +1,5 @@
 /*	$FreeBSD$	*/
-/*	$KAME: ndp.c,v 1.65 2001/05/08 04:36:34 itojun Exp $	*/
+/*	$KAME: ndp.c,v 1.104 2003/06/27 07:48:39 itojun Exp $	*/
 
 /*
  * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
@@ -111,6 +111,7 @@
 #include <stdlib.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <err.h>
 #include "gmt2local.h"
 
 /* packing rule for routing socket */
@@ -119,7 +120,6 @@
 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 
 static pid_t pid;
-static int cflag;
 static int nflag;
 static int tflag;
 static int32_t thiszone;	/* time difference with gmt */
@@ -136,14 +136,13 @@ void getsocket __P((void));
 int set __P((int, char **));
 void get __P((char *));
 int delete __P((char *));
-void dump __P((struct in6_addr *));
-static struct in6_nbrinfo *getnbrinfo __P((struct in6_addr *addr,
-					   int ifindex, int));
+void dump __P((struct in6_addr *, int));
+static struct in6_nbrinfo *getnbrinfo __P((struct in6_addr *, int, int));
 static char *ether_str __P((struct sockaddr_dl *));
 int ndp_ether_aton __P((char *, u_char *));
 void usage __P((void));
 int rtmsg __P((int));
-void ifinfo __P((int, char **));
+void ifinfo __P((char *, int, char **));
 void rtrlist __P((void));
 void plist __P((void));
 void pfx_flush __P((void));
@@ -154,16 +153,21 @@ void harmonize_rtr __P((void));
 static void getdefif __P((void));
 static void setdefif __P((char *));
 #endif
-static char *sec2str __P((time_t t));
-static char *ether_str __P((struct sockaddr_dl *sdl));
+static char *sec2str __P((time_t));
+static char *ether_str __P((struct sockaddr_dl *));
 static void ts_print __P((const struct timeval *));
 
+#ifdef ICMPV6CTL_ND6_DRLIST
 static char *rtpref_str[] = {
 	"medium",		/* 00 */
 	"high",			/* 01 */
 	"rsv",			/* 10 */
 	"low"			/* 11 */
 };
+#endif
+
+int mode = 0;
+char *arg = NULL;
 
 int
 main(argc, argv)
@@ -171,76 +175,54 @@ main(argc, argv)
 	char **argv;
 {
 	int ch;
-	int aflag = 0, dflag = 0, sflag = 0, Hflag = 0,
-		pflag = 0, rflag = 0, Pflag = 0, Rflag = 0;
 
 	pid = getpid();
 	thiszone = gmt2local(0);
-	while ((ch = getopt(argc, argv, "acndfIilprstA:HPR")) != -1)
+	while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1)
 		switch (ch) {
 		case 'a':
-			aflag = 1;
-			break;
 		case 'c':
-			cflag = 1;
+		case 'p':
+		case 'r':
+		case 'H':
+		case 'P':
+		case 'R':
+		case 's':
+		case 'I':
+			if (mode) {
+				usage();
+				/*NOTREACHED*/
+			}
+			mode = ch;
+			arg = NULL;
 			break;
 		case 'd':
-			dflag = 1;
-			break;
-		case 'I':
-#ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
-			if (argc > 2)
-				setdefif(argv[2]);
-			getdefif(); /* always call it to print the result */
-			exit(0);
-#else
-			errx(1, "not supported yet");
-			/*NOTREACHED*/
-#endif
+		case 'f':
 		case 'i' :
-			argc -= optind;
-			argv += optind;
-			if (argc < 1)
+			if (mode) {
 				usage();
-			ifinfo(argc, argv);
-			exit(0);
+				/*NOTREACHED*/
+			}
+			mode = ch;
+			arg = optarg;
+			break;
 		case 'n':
 			nflag = 1;
-			continue;
-		case 'p':
-			pflag = 1;
-			break;
-		case 'f' :
-			if (argc != 3)
-				usage();
-			file(argv[2]);
-			exit(0);
-		case 'l' :
-			/* obsolete, ignored */
-			break;
-		case 'r' :
-			rflag = 1;
-			break;
-		case 's':
-			sflag = 1;
 			break;
 		case 't':
 			tflag = 1;
 			break;
 		case 'A':
-			aflag = 1;
+			if (mode) {
+				usage();
+				/*NOTREACHED*/
+			}
+			mode = 'a';
 			repeat = atoi(optarg);
-			if (repeat < 0)
+			if (repeat < 0) {
 				usage();
-			break;
-		case 'H' :
-			Hflag = 1;
-			break;
-		case 'P':
-			Pflag = 1;
-			break;
-		case 'R':
-			Rflag = 1;
+				/*NOTREACHED*/
+			}
 			break;
 		default:
 			usage();
@@ -249,45 +231,90 @@ main(argc, argv)
 	argc -= optind;
 	argv += optind;
 
-	if (aflag || cflag) {
-		dump(0);
-		exit(0);
-	}
-	if (dflag) {
-		if (argc != 1)
+	switch (mode) {
+	case 'a':
+	case 'c':
+		if (argc != 0) {
 			usage();
-		delete(argv[0]);
-		exit(0);
-	}
-	if (pflag) {
+			/*NOTREACHED*/
+		}
+		dump(0, mode == 'c');
+		break;
+	case 'd':
+		if (argc != 0) {
+			usage();
+			/*NOTREACHED*/
+		}
+		delete(arg);
+		break;
+	case 'I':
+#ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
+		if (argc > 1) {
+			usage();
+			/*NOTREACHED*/
+		} else if (argc == 1) {
+			if (strcmp(*argv, "delete") == 0 ||
+			    if_nametoindex(*argv))
+				setdefif(*argv);
+			else
+				errx(1, "invalid interface %s", *argv);
+		}
+		getdefif(); /* always call it to print the result */
+		break;
+#else
+		errx(1, "not supported yet");
+		/*NOTREACHED*/
+#endif
+	case 'p':
+		if (argc != 0) {
+			usage();
+			/*NOTREACHED*/
+		}
 		plist();
-		exit(0);
-	}
-	if (rflag) {
+		break;
+	case 'i':
+		ifinfo(arg, argc, argv);
+		break;
+	case 'r':
+		if (argc != 0) {
+			usage();
+			/*NOTREACHED*/
+		}
 		rtrlist();
-		exit(0);
-	}
-	if (sflag) {
+		break;
+	case 's':
 		if (argc < 2 || argc > 4)
 			usage();
 		exit(set(argc, argv) ? 1 : 0);
-	}
-	if (Hflag) {
+	case 'H':
+		if (argc != 0) {
+			usage();
+			/*NOTREACHED*/
+		}
 		harmonize_rtr();
-		exit(0);
-	}
-	if (Pflag) {
+		break;
+	case 'P':
+		if (argc != 0) {
+			usage();
+			/*NOTREACHED*/
+		}
 		pfx_flush();
-		exit(0);
-	}
-	if (Rflag) {
+		break;
+	case 'R':
+		if (argc != 0) {
+			usage();
+			/*NOTREACHED*/
+		}
 		rtr_flush();
-		exit(0);
+		break;
+	case 0:
+		if (argc != 1) {
+			usage();
+			/*NOTREACHED*/
+		}
+		get(argv[0]);
+		break;
 	}
-
-	if (argc != 1)
-		usage();
-	get(argv[0]);
 	exit(0);
 }
 
@@ -313,8 +340,8 @@ file(name)
 	args[4] = &arg[4][0];
 	retval = 0;
 	while (fgets(line, 100, fp) != NULL) {
-		i = sscanf(line, "%s %s %s %s %s", arg[0], arg[1], arg[2],
-		    arg[3], arg[4]);
+		i = sscanf(line, "%49s %49s %49s %49s %49s",
+		    arg[0], arg[1], arg[2], arg[3], arg[4]);
 		if (i < 2) {
 			fprintf(stderr, "ndp: bad line: %s\n", line);
 			retval = 1;
@@ -408,10 +435,12 @@ set(argc, argv)
 	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
 		if (sdl->sdl_family == AF_LINK &&
 		    (rtm->rtm_flags & RTF_LLINFO) &&
-		    !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) {
-		case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
-		case IFT_ISO88024: case IFT_ISO88025:
-			goto overwrite;
+		    !(rtm->rtm_flags & RTF_GATEWAY)) {
+			switch (sdl->sdl_type) {
+			case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
+			case IFT_ISO88024: case IFT_ISO88025:
+				goto overwrite;
+			}
 		}
 		/*
 		 * IPv4 arp command retries with sin_other = SIN_PROXY here.
@@ -457,7 +486,7 @@ get(host)
 		    htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
 	}
 #endif
-	dump(&sin->sin6_addr);
+	dump(&sin->sin6_addr, 0);
 	if (found_entry == 0) {
 		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 		    sizeof(host_buf), NULL ,0,
@@ -541,7 +570,7 @@ delete:
 	return 0;
 }
 
-#define W_ADDR	31
+#define W_ADDR	36
 #define W_LL	17
 #define W_IF	6
 
@@ -549,8 +578,9 @@ delete:
  * Dump the entire neighbor cache
  */
 void
-dump(addr)
+dump(addr, cflag)
 	struct in6_addr *addr;
+	int cflag;
 {
 	int mib[6];
 	size_t needed;
@@ -569,9 +599,9 @@ dump(addr)
 
 	/* Print header */
 	if (!tflag && !cflag)
-		printf("%-*.*s %-*.*s %*.*s %-9.9s %2s %4s %4s\n",
+		printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
 		    W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
-		    W_IF, W_IF, "Netif", "Expire", "St", "Flgs", "Prbs");
+		    W_IF, W_IF, "Netif", "Expire", "S", "Flags");
 
 again:;
 	mib[0] = CTL_NET;
@@ -614,6 +644,9 @@ again:;
 		if (sdl->sdl_family != AF_LINK)
 			continue;
 
+		if (!(rtm->rtm_flags & RTF_HOST))
+			continue;
+
 		if (addr) {
 			if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
 				continue;
@@ -632,10 +665,13 @@ again:;
 		}
 		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
 		    sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0));
-		if (cflag == 1) {
+		if (cflag) {
 #ifdef RTF_WASCLONED
 			if (rtm->rtm_flags & RTF_WASCLONED)
 				delete(host_buf);
+#elif defined(RTF_CLONED)
+			if (rtm->rtm_flags & RTF_CLONED)
+				delete(host_buf);
 #else
 			delete(host_buf);
 #endif
@@ -707,7 +743,6 @@ again:;
 			warnx("failed to get neighbor information");
 			printf("  ");
 		}
-		putchar(' ');
 
 		/*
 		 * other flags. R: router, P: proxy, W: ??
@@ -719,16 +754,22 @@ again:;
 		} else {
 			sin = (struct sockaddr_in6 *)
 			    (sdl->sdl_len + (char *)sdl);
+#if 0	/* W and P are mystery even for us */
 			snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
 			    isrouter ? "R" : "",
 			    !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
 			    (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
 			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
+#else
+			snprintf(flgbuf, sizeof(flgbuf), "%s%s",
+			    isrouter ? "R" : "",
+			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
+#endif
 		}
-		printf(" %-4.4s", flgbuf);
+		printf(" %s", flgbuf);
 
 		if (prbs)
-			printf(" %4d", prbs);
+			printf(" %d", prbs);
 
 		printf("\n");
 	}
@@ -806,22 +847,16 @@ ndp_ether_aton(a, n)
 void
 usage()
 {
-	printf("usage: ndp hostname\n");
-	printf("       ndp -a[nt]\n");
+	printf("usage: ndp [-nt] hostname\n");
+	printf("       ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
 	printf("       ndp [-nt] -A wait\n");
-	printf("       ndp -c[nt]\n");
-	printf("       ndp -d[nt] hostname\n");
-	printf("       ndp -f[nt] filename\n");
-	printf("       ndp -i interface [flags...]\n");
+	printf("       ndp [-nt] -d hostname\n");
+	printf("       ndp [-nt] -f filename\n");
+	printf("       ndp [-nt] -i interface [flags...]\n");
 #ifdef SIOCSDEFIFACE_IN6
-	printf("       ndp -I [interface|delete]\n");
+	printf("       ndp [-nt] -I [interface|delete]\n");
 #endif
-	printf("       ndp -p\n");
-	printf("       ndp -r\n");
-	printf("       ndp -s hostname ether_addr [temp] [proxy]\n");
-	printf("       ndp -H\n");
-	printf("       ndp -P\n");
-	printf("       ndp -R\n");
+	printf("       ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
 	exit(1);
 }
 
@@ -848,8 +883,10 @@ rtmsg(cmd)
 		exit(1);
 	case RTM_ADD:
 		rtm->rtm_addrs |= RTA_GATEWAY;
-		rtm->rtm_rmx.rmx_expire = expire_time;
-		rtm->rtm_inits = RTV_EXPIRE;
+		if (expire_time) {
+			rtm->rtm_rmx.rmx_expire = expire_time;
+			rtm->rtm_inits = RTV_EXPIRE;
+		}
 		rtm->rtm_flags |= (RTF_HOST | RTF_STATIC);
 		if (rtm->rtm_flags & RTF_ANNOUNCE) {
 			rtm->rtm_flags &= ~RTF_HOST;
@@ -889,13 +926,13 @@ doit:
 }
 
 void
-ifinfo(argc, argv)
+ifinfo(ifname, argc, argv)
+	char *ifname;
 	int argc;
 	char **argv;
 {
 	struct in6_ndireq nd;
 	int i, s;
-	char *ifname = argv[0];
 	u_int32_t newflags;
 #ifdef IPV6CTL_USETEMPADDR
 	u_int8_t nullbuf[8];
@@ -910,10 +947,10 @@ ifinfo(argc, argv)
 	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
 		err(1, "ioctl(SIOCGIFINFO_IN6)");
 		/* NOTREACHED */
- 	}
+	}
 #define ND nd.ndi
 	newflags = ND.flags;
-	for (i = 1; i < argc; i++) {
+	for (i = 0; i < argc; i++) {
 		int clear = 0;
 		char *cp = argv[i];
 
@@ -935,6 +972,9 @@ ifinfo(argc, argv)
 #ifdef ND6_IFF_ACCEPT_RTADV
 		SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
 #endif
+#ifdef ND6_IFF_PREFER_SOURCE
+		SETFLAG("prefer_source", ND6_IFF_PREFER_SOURCE);
+#endif
 
 		ND.flags = newflags;
 		if (ioctl(s, SIOCSIFINFO_FLAGS, (caddr_t)&nd) < 0) {
@@ -990,7 +1030,11 @@ ifinfo(argc, argv)
 		if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
 			printf("accept_rtadv ");
 #endif
-}
+#ifdef ND6_IFF_PREFER_SOURCE
+		if ((ND.flags & ND6_IFF_PREFER_SOURCE))
+			printf("prefer_source ");
+#endif
+	}
 	putc('\n', stdout);
 #undef ND
 
@@ -1153,11 +1197,11 @@ plist()
 		if (p->vltime == ND6_INFINITE_LIFETIME)
 			printf(" vltime=infinity");
 		else
-			printf(" vltime=%ld", (long)p->vltime);
+			printf(" vltime=%lu", (unsigned long)p->vltime);
 		if (p->pltime == ND6_INFINITE_LIFETIME)
 			printf(", pltime=infinity");
 		else
-			printf(", pltime=%ld", (long)p->pltime);
+			printf(", pltime=%lu", (unsigned long)p->pltime);
 		if (p->expire == 0)
 			printf(", expire=Never");
 		else if (p->expire >= time.tv_sec)
@@ -1175,7 +1219,7 @@ plist()
 			int j;
 			struct sockaddr_in6 *sin6;
 
-			sin6 = (struct sockaddr_in6 *)(p + 1);
+			sin6 = advrtr;
 			printf("  advertised by\n");
 			for (j = 0; j < p->advrtrs; j++) {
 				struct in6_nbrinfo *nbi;
@@ -1293,11 +1337,11 @@ plist()
 		if (PR.vltime == ND6_INFINITE_LIFETIME)
 			printf(" vltime=infinity");
 		else
-			printf(" vltime=%ld", (long)PR.vltime);
+			printf(" vltime=%lu", PR.vltime);
 		if (PR.pltime == ND6_INFINITE_LIFETIME)
 			printf(", pltime=infinity");
 		else
-			printf(", pltime=%ld", (long)PR.pltime);
+			printf(", pltime=%lu", PR.pltime);
 		if (PR.expire == 0)
 			printf(", expire=Never");
 		else if (PR.expire >= time.tv_sec)