 @@ -1,1813 +1,1816 @@
-/*	$NetBSD: route.c,v 1.155.4.3 2018/04/09 13:34:11 bouyer Exp $	*/
+/*	$NetBSD: route.c,v 1.155.4.4 2018/08/25 07:06:48 martin Exp $	*/
 /*
  * Copyright (c) 1983, 1989, 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 #include <sys/cdefs.h>
 #ifndef lint
 __COPYRIGHT("@(#) Copyright (c) 1983, 1989, 1991, 1993\
  The Regents of the University of California.  All rights reserved.");
 #endif /* not lint */
 #ifndef lint
 #if 0
 static char sccsid[] = "@(#)route.c	8.6 (Berkeley) 4/28/95";
 #else
-__RCSID("$NetBSD: route.c,v 1.155.4.3 2018/04/09 13:34:11 bouyer Exp $");
+__RCSID("$NetBSD: route.c,v 1.155.4.4 2018/08/25 07:06:48 martin Exp $");
 #endif
 #endif /* not lint */
 #include <sys/param.h>
 #include <sys/file.h>
 #include <sys/socket.h>
 #include <sys/ioctl.h>
 #include <sys/sysctl.h>
 #include <net/if.h>
 #include <net/route.h>
 #include <net/if_dl.h>
 #include <net80211/ieee80211_netbsd.h>
 #include <netinet/in.h>
 #include <netatalk/at.h>
 #include <netmpls/mpls.h>
 #include <arpa/inet.h>
 #include <netdb.h>
 #include <errno.h>
 #include <unistd.h>
 #include <stdio.h>
 #include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
 #include <paths.h>
 #include <err.h>
 #include "keywords.h"
 #include "extern.h"
 #include "prog_ops.h"
 #include "rtutil.h"
 union sockunion {
 	struct	sockaddr sa;
 	struct	sockaddr_in sin;
 #ifdef INET6
 	struct	sockaddr_in6 sin6;
 #endif
 	struct	sockaddr_at sat;
 	struct	sockaddr_dl sdl;
 #ifndef SMALL
 	struct	sockaddr_mpls smpls;
 #endif /* SMALL */
 	struct	sockaddr_storage sstorage;
 };
 typedef union sockunion *sup;
 struct sou {
 	union sockunion *so_dst, *so_gate, *so_mask, *so_genmask, *so_ifa,
 		*so_ifp, *so_mpls;
 };
 static const char *route_strerror(int);
 static void set_metric(const char *, int);
 static int newroute(int, char *const *);
 static void inet_makenetandmask(u_int32_t, struct sockaddr_in *, struct sou *);
 #ifdef INET6
 static int inet6_makenetandmask(const struct sockaddr_in6 *, struct sou *);
 #endif
 static int getaddr(int, const char *, struct hostent **, struct sou *);
 static int flushroutes(int, char *const [], int);
 static char *netmask_string(const struct sockaddr *, int, int);
 static int prefixlen(const char *, struct sou *);
 #ifndef SMALL
 static void interfaces(void);
 static void monitor(int, char * const *);
 static int print_getmsg(struct rt_msghdr *, int, struct sou *);
 static const char *linkstate(struct if_msghdr *);
 static sup readtag(sup, const char *);
 static void addtag(sup, const char *, int);
 #endif /* SMALL */
 static int rtmsg(int, int, struct sou *);
 static void mask_addr(struct sou *);
 static void print_rtmsg(struct rt_msghdr *, int);
 static void pmsg_common(struct rt_msghdr *);
 static void pmsg_addrs(const char *, int);
 static void bprintf(FILE *, int, const char *);
 static void sodump(sup, const char *);
 static void sockaddr(const char *, struct sockaddr *);
 int	pid, rtm_addrs;
 int	sock;
 int	forcehost, forcenet, doflush, af;
 int	iflag, Lflag, nflag, qflag, tflag, Sflag, Tflag;
 int	verbose, aflen = sizeof(struct sockaddr_in), rtag;
 int	locking, lockrest, debugonly, shortoutput;
 struct	rt_metrics rt_metrics;
 int	rtm_inits;
 short ns_nullh[] = {0,0,0};
 short ns_bh[] = {-1,-1,-1};
 static const char opts[] = "dfLnqSsTtv";
 void
 usage(const char *cp)
+{
 	if (cp)
 		warnx("botched keyword: %s", cp);
 	(void)fprintf(stderr,
 	    "Usage: %s [-%s] cmd [[-<qualifers>] args]\n", getprogname(), opts);
 	exit(1);
 	/* NOTREACHED */
+}
 #define	PRIETHER	"02x:%02x:%02x:%02x:%02x:%02x"
 #define	PRIETHER_ARGS(__enaddr)	(__enaddr)[0], (__enaddr)[1], (__enaddr)[2], \
 				(__enaddr)[3], (__enaddr)[4], (__enaddr)[5]
 int
 main(int argc, char * const *argv)
+{
 	int ch;
 	if (argc < 2)
 		usage(NULL);
 	while ((ch = getopt(argc, argv, opts)) != -1)
 		switch (ch) {
 		case 'd':
 			debugonly = 1;
 			break;
 		case 'f':
 			doflush = 1;
 			break;
 		case 'L':
 			Lflag = RT_LFLAG;
 			break;
 		case 'n':
 			nflag = RT_NFLAG;
 			break;
 		case 'q':
 			qflag = 1;
 			break;
 		case 'S':
 			Sflag = 1;
 			break;
 		case 's':
 			shortoutput = 1;
 			break;
 		case 'T':
 			Tflag = RT_TFLAG;
 			break;
 		case 't':
 			tflag = 1;
 			break;
 		case 'v':
 			verbose = RT_VFLAG;
 			break;
 		case '?':
 		default:
 			usage(NULL);
 			/*NOTREACHED*/
+		}
 	argc -= optind;
 	argv += optind;
 	if (prog_init && prog_init() == -1)
 		err(1, "init failed");
 	pid = prog_getpid();
 	if (tflag)
 		sock = prog_open("/dev/null", O_WRONLY, 0);
 	else
 		sock = prog_socket(PF_ROUTE, SOCK_RAW, 0);
 	if (sock < 0)
 		err(EXIT_FAILURE, "socket");
 	if (*argv == NULL) {
 		if (doflush)
 			ch = K_FLUSH;
 		else
 			goto no_cmd;
 	} else
 		ch = keyword(*argv);
 	switch (ch) {
 #ifndef SMALL
 	case K_GET:
 #endif /* SMALL */
 	case K_CHANGE:
 	case K_ADD:
 	case K_DELETE:
 		if (doflush)
 			(void)flushroutes(1, argv, 0);
 		return newroute(argc, argv);
 	case K_SHOW:
 		show(argc, argv, Lflag|nflag|Tflag|verbose);
 		return 0;
 #ifndef SMALL
 	case K_MONITOR:
 		monitor(argc, argv);
 		return 0;
 #endif /* SMALL */
 	case K_FLUSH:
 		return flushroutes(argc, argv, 0);
 	case K_FLUSHALL:
 		return flushroutes(argc, argv, 1);
 	no_cmd:
 	default:
 		usage(*argv);
 		/*NOTREACHED*/
+	}
+}
 static char *
 netmask_string(const struct sockaddr *mask, int len, int family)
+{
 	static char smask[INET6_ADDRSTRLEN];
 	struct sockaddr_in nsin;
 	struct sockaddr_in6 nsin6;
 	if (len >= 0)
 		snprintf(smask, sizeof(smask), "%d", len);
 	else {
 		switch (family) {
 		case AF_INET:
 			memset(&nsin, 0, sizeof(nsin));
 			memcpy(&nsin, mask, mask->sa_len);
 			snprintf(smask, sizeof(smask), "%s",
 			    inet_ntoa(nsin.sin_addr));
 			break;
 		case AF_INET6:
 			memset(&nsin6, 0, sizeof(nsin6));
 			memcpy(&nsin6, mask, mask->sa_len);
 			inet_ntop(family, &nsin6.sin6_addr, smask,
 			    sizeof(smask));
 			break;
 		default:
 			snprintf(smask, sizeof(smask), "%s", any_ntoa(mask));
+		}
+	}
 	return smask;
+}
 /*
  * Purge all entries in the routing tables not
  * associated with network interfaces.
  */
 static int
 flushroutes(int argc, char * const argv[], int doall)
+{
 	struct sockaddr *sa;
 	size_t needed;
 	int flags, mib[6], rlen, seqno;
 	char *buf, *next, *lim;
 	const char *afname;
 	struct rt_msghdr *rtm;
 	flags = 0;
 	af = AF_UNSPEC;
 	/* Don't want to read back our messages */
 	prog_shutdown(sock, SHUT_RD);
 	parse_show_opts(argc, argv, &af, &flags, &afname, false);
 	mib[0] = CTL_NET;
 	mib[1] = PF_ROUTE;
 	mib[2] = 0;		/* protocol */
 	mib[3] = 0;		/* wildcard address family */
 	mib[4] = NET_RT_DUMP;
 	mib[5] = 0;		/* no flags */
 	if (prog_sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 		err(EXIT_FAILURE, "route-sysctl-estimate");
 	buf = lim = NULL;
 	if (needed) {
 		if ((buf = malloc(needed)) == NULL)
 			err(EXIT_FAILURE, "malloc");
 		if (prog_sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 			err(EXIT_FAILURE, "actual retrieval of routing table");
 		lim = buf + needed;
+	}
 	if (verbose) {
 		(void)printf("Examining routing table from sysctl\n");
 		if (af != AF_UNSPEC)
 			printf("(address family %s)\n", afname);
+	}
 	if (needed == 0)
 		return 0;
 	seqno = 0;		/* ??? */
 	for (next = buf; next < lim; next += rtm->rtm_msglen) {
 		rtm = (struct rt_msghdr *)next;
 		sa = (struct sockaddr *)(rtm + 1);
 		if (verbose)
 			print_rtmsg(rtm, rtm->rtm_msglen);
 		if ((rtm->rtm_flags & flags) != flags)
 			continue;
 		if (!(rtm->rtm_flags & (RTF_GATEWAY | RTF_STATIC)) && !doall)
 			continue;
 		if (af != AF_UNSPEC && sa->sa_family != af)
 			continue;
 		if (debugonly)
 			continue;
 		rtm->rtm_type = RTM_DELETE;
 		rtm->rtm_seq = seqno;
 		do {
 			rlen = prog_write(sock, next, rtm->rtm_msglen);
 		} while (rlen == -1 && errno == ENOBUFS);
 		if (rlen == -1) {
 			warnx("writing to routing socket: %s",
 			    route_strerror(errno));
 			return 1;
+		}
 		if (rlen < (int)rtm->rtm_msglen) {
 			warnx("write to routing socket, got %d for rlen", rlen);
 			return 1;
+		}
 		seqno++;
 		if (qflag)
 			continue;
 		if (verbose)
 			print_rtmsg(rtm, rlen);
 		else {
 			(void)printf("%-20.20s ", netname(sa, NULL, nflag));
 			sa = (struct sockaddr *)(RT_ROUNDUP(sa->sa_len) +
 			    (char *)sa);
 			(void)printf("%-20.20s ", routename(sa, nflag));
 			(void)printf("done\n");
+		}
+	}
 	free(buf);
 	return 0;
+}
 static const char *
 route_strerror(int error)
+{
 	switch (error) {
 	case ESRCH:
 		return "not in table";
 	case EBUSY:
 		return "entry in use";
 	case ENOBUFS:
 		return "routing table overflow";
 	default:
 		return strerror(error);
+	}
+}
 static void
 set_metric(const char *value, int key)
+{
 	int flag = 0;
 	uint64_t noval, *valp = &noval;
 	switch (key) {
 #define caseof(x, y, z) \
 	case x: valp = (uint64_t *)&rt_metrics.z; flag = y; break
 	caseof(K_MTU, RTV_MTU, rmx_mtu);
 	caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
 	caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
 	caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
 	caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
 	caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
 	caseof(K_RTT, RTV_RTT, rmx_rtt);
 	caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
+	}
 	rtm_inits |= flag;
 	if (lockrest || locking)
 		rt_metrics.rmx_locks |= flag;
 	if (locking)
 		locking = 0;
 	*valp = strtoul(value, NULL, 0);
+}
 static int
 newroute(int argc, char *const *argv)
+{
 	const char *cmd, *dest = "", *gateway = "";
 	int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC;
 	int key;
 	struct hostent *hp = 0;
 	struct sou sou, *soup = &sou;
 	sou.so_dst = calloc(1, sizeof(union sockunion));
 	sou.so_gate = calloc(1, sizeof(union sockunion));
 	sou.so_mask = calloc(1, sizeof(union sockunion));
 	sou.so_genmask = calloc(1, sizeof(union sockunion));
 	sou.so_ifa = calloc(1, sizeof(union sockunion));
 	sou.so_ifp = calloc(1, sizeof(union sockunion));
 	sou.so_mpls = calloc(1, sizeof(union sockunion));
 	if (sou.so_dst == NULL || sou.so_gate == NULL || sou.so_mask == NULL ||
 	    sou.so_genmask == NULL || sou.so_ifa == NULL || sou.so_ifp == NULL ||
 	    sou.so_mpls == NULL)
 		errx(EXIT_FAILURE, "Cannot allocate memory");
 	cmd = argv[0];
 	af = AF_UNSPEC;
 	if (*cmd != 'g') {
 		/* Don't want to read back our messages */
 		prog_shutdown(sock, SHUT_RD);
+	}
 	while (--argc > 0) {
 		if (**(++argv)== '-') {
 			switch (key = keyword(1 + *argv)) {
 			case K_SA:
 				af = PF_ROUTE;
 				aflen = sizeof(union sockunion);
 				break;
 #ifndef SMALL
 			case K_ATALK:
 				af = AF_APPLETALK;
 				aflen = sizeof(struct sockaddr_at);
 				break;
 #endif
 			case K_INET:
 				af = AF_INET;
 				aflen = sizeof(struct sockaddr_in);
 				break;
 #ifdef INET6
 			case K_INET6:
 				af = AF_INET6;
 				aflen = sizeof(struct sockaddr_in6);
 				break;
 #endif
 			case K_LINK:
 				af = AF_LINK;
 				aflen = sizeof(struct sockaddr_dl);
 				break;
 #ifndef SMALL
 			case K_MPLS:
 				af = AF_MPLS;
 				aflen = sizeof(struct sockaddr_mpls);
 				break;
 			case K_TAG:
 				if (!--argc)
 					usage(1+*argv);
 				af = AF_MPLS;
 				aflen = sizeof(struct sockaddr_mpls);
 				(void)getaddr(RTA_TAG, *++argv, 0, soup);
 				break;
 #endif /* SMALL */
 			case K_IFACE:
 			case K_INTERFACE:
 				iflag++;
 				break;
 			case K_NOSTATIC:
 				flags &= ~RTF_STATIC;
 				break;
 			case K_LOCK:
 				locking = 1;
 				break;
 			case K_LOCKREST:
 				lockrest = 1;
 				break;
 			case K_HOST:
 				forcehost++;
 				break;
 			case K_REJECT:
 				flags |= RTF_REJECT;
 				break;
 			case K_NOREJECT:
 				flags &= ~RTF_REJECT;
 				break;
 			case K_BLACKHOLE:
 				flags |= RTF_BLACKHOLE;
 				break;
 			case K_NOBLACKHOLE:
 				flags &= ~RTF_BLACKHOLE;
 				break;
 			case K_PROTO1:
 				flags |= RTF_PROTO1;
 				break;
 			case K_PROTO2:
 				flags |= RTF_PROTO2;
 				break;
 			case K_PROXY:
 				flags |= RTF_ANNOUNCE;
 				break;
 			case K_CONNECTED:
 				flags |= RTF_CONNECTED;
 				break;
 			case K_NOCONNECTED:
 				flags &= ~RTF_CONNECTED;
 				break;
 			case K_STATIC:
 				flags |= RTF_STATIC;
 				break;
 			case K_IFA:
 				if (!--argc)
 					usage(1+*argv);
 				(void)getaddr(RTA_IFA, *++argv, 0, soup);
 				break;
 			case K_IFP:
 				if (!--argc)
 					usage(1+*argv);
 				(void)getaddr(RTA_IFP, *++argv, 0, soup);
 				break;
 			case K_GENMASK:
 				if (!--argc)
 					usage(1+*argv);
 				(void)getaddr(RTA_GENMASK, *++argv, 0, soup);
 				break;
 			case K_GATEWAY:
 				if (!--argc)
 					usage(1+*argv);
 				(void)getaddr(RTA_GATEWAY, *++argv, 0, soup);
 				break;
 			case K_DST:
 				if (!--argc)
 					usage(1+*argv);
 				ishost = getaddr(RTA_DST, *++argv, &hp, soup);
 				dest = *argv;
 				break;
 			case K_NETMASK:
 				if (!--argc)
 					usage(1+*argv);
 				(void)getaddr(RTA_NETMASK, *++argv, 0, soup);
 				/* FALLTHROUGH */
 			case K_NET:
 				forcenet++;
 				break;
 			case K_PREFIXLEN:
 				if (!--argc)
 					usage(1+*argv);
 				ishost = prefixlen(*++argv, soup);
 				break;
 			case K_MTU:
 			case K_HOPCOUNT:
 			case K_EXPIRE:
 			case K_RECVPIPE:
 			case K_SENDPIPE:
 			case K_SSTHRESH:
 			case K_RTT:
 			case K_RTTVAR:
 				if (!--argc)
 					usage(1+*argv);
 				set_metric(*++argv, key);
 				break;
 			default:
 				usage(1+*argv);
+			}
 		} else {
 			if ((rtm_addrs & RTA_DST) == 0) {
 				dest = *argv;
 				ishost = getaddr(RTA_DST, *argv, &hp, soup);
 			} else if ((rtm_addrs & RTA_GATEWAY) == 0) {
 				gateway = *argv;
 				(void)getaddr(RTA_GATEWAY, *argv, &hp, soup);
 			} else {
 				ret = atoi(*argv);
 				if (ret == 0) {
 				    if (strcmp(*argv, "0") == 0) {
 					if (!qflag)  {
 					    warnx("%s, %s",
 						"old usage of trailing 0",
 						"assuming route to if");
+					}
 				    } else
 					usage(NULL);
 				    iflag = 1;
 				    continue;
 				} else if (ret > 0 && ret < 10) {
 				    if (!qflag) {
 					warnx("%s, %s",
 					    "old usage of trailing digit",
 					    "assuming route via gateway");
+				    }
 				    iflag = 0;
 				    continue;
+				}
 				(void)getaddr(RTA_NETMASK, *argv, 0, soup);
+			}
+		}
+	}
 	if ((rtm_addrs & RTA_DST) == 0)
 		errx(EXIT_FAILURE, "missing destination specification");
 	if (*cmd == 'a' && (rtm_addrs & RTA_GATEWAY) == 0)
 		errx(EXIT_FAILURE, "missing gateway specification");
 	if (forcehost && forcenet)
 		errx(EXIT_FAILURE, "-host and -net conflict");
 	else if (forcehost)
 		ishost = 1;
 	else if (forcenet)
 		ishost = 0;
 	flags |= RTF_UP;
 	if (ishost)
 		flags |= RTF_HOST;
 	if (iflag == 0)
 		flags |= RTF_GATEWAY;
 	for (attempts = 1; ; attempts++) {
 		errno = 0;
 		if ((ret = rtmsg(*cmd, flags, soup)) == 0)
 			break;
 		if (errno != ENETUNREACH && errno != ESRCH)
 			break;
 		if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) {
 			hp->h_addr_list++;
 			memmove(&soup->so_gate->sin.sin_addr, hp->h_addr_list[0],
 			    hp->h_length);
 		} else
 			break;
+	}
 	if (*cmd == 'g' || qflag)
 		goto out;
 	oerrno = errno;
 	(void)printf("%s %s %s", cmd, ishost? "host" : "net", dest);
 	if (*gateway) {
 		(void)printf(": gateway %s", gateway);
 		if (attempts > 1 && ret == 0 && af == AF_INET)
 		    (void)printf(" (%s)",
 			inet_ntoa(soup->so_gate->sin.sin_addr));
+	}
 	if (ret == 0)
 		(void)printf("\n");
 	else
 		(void)printf(": %s\n", route_strerror(oerrno));
 out:
 	free(sou.so_dst);
 	free(sou.so_gate);
 	free(sou.so_mask);
 	free(sou.so_genmask);
 	free(sou.so_ifa);
 	free(sou.so_ifp);
 	free(sou.so_mpls);
 	return ret != 0;
+}
 static void
 inet_makenetandmask(const u_int32_t net, struct sockaddr_in * const isin,
     struct sou *soup)
+{
 	struct sockaddr_in *sin;
 	u_int32_t addr, mask = 0;
 	char *cp;
 	rtm_addrs |= RTA_NETMASK;
 	if (net == 0)
 		mask = addr = 0;
 	else if (net < 128) {
 		addr = net << IN_CLASSA_NSHIFT;
 		mask = IN_CLASSA_NET;
 	} else if (net < 192) {
 		addr = net << IN_CLASSA_NSHIFT;
 		mask = IN_CLASSB_NET;
 	} else if (net < 224) {
 		addr = net << IN_CLASSA_NSHIFT;
 		mask = IN_CLASSC_NET;
 	} else if (net < 256) {
 		addr = net << IN_CLASSA_NSHIFT;
 		mask = IN_CLASSD_NET;
 	} else if (net < 49152) { /* 192 * 256 */
 		addr = net << IN_CLASSB_NSHIFT;
 		mask = IN_CLASSB_NET;
 	} else if (net < 57344) { /* 224 * 256 */
 		addr = net << IN_CLASSB_NSHIFT;
 		mask = IN_CLASSC_NET;
 	} else if (net < 65536) {
 		addr = net << IN_CLASSB_NSHIFT;
 		mask = IN_CLASSB_NET;
 	} else if (net < 14680064L) { /* 224 * 65536 */
 		addr = net << IN_CLASSC_NSHIFT;
 		mask = IN_CLASSC_NET;
 	} else if (net < 16777216L) {
 		addr = net << IN_CLASSC_NSHIFT;
 		mask = IN_CLASSD_NET;
 	} else {
 		addr = net;
 		if ((addr & IN_CLASSA_HOST) == 0)
 			mask =  IN_CLASSA_NET;
 		else if ((addr & IN_CLASSB_HOST) == 0)
 			mask =  IN_CLASSB_NET;
 		else if ((addr & IN_CLASSC_HOST) == 0)
 			mask =  IN_CLASSC_NET;
 		else
 			mask = -1;
+	}
 	isin->sin_addr.s_addr = htonl(addr);
 	sin = &soup->so_mask->sin;
 	sin->sin_addr.s_addr = htonl(mask);
 	sin->sin_len = 0;
 	sin->sin_family = 0;
 	cp = (char *)(&sin->sin_addr + 1);
 	while (*--cp == 0 && cp > (char *)sin)
+		;
 	sin->sin_len = 1 + cp - (char *)sin;
 	sin->sin_family = AF_INET;
+}
 #ifdef INET6
 /*
  * XXX the function may need more improvement...
  */
 static int
 inet6_makenetandmask(const struct sockaddr_in6 * const sin6, struct sou *soup)
+{
 	const char *plen;
 	struct in6_addr in6;
 	plen = NULL;
 	if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
 	    sin6->sin6_scope_id == 0) {
 		plen = "0";
 	} else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
 		/* aggregatable global unicast - RFC2374 */
 		memset(&in6, 0, sizeof(in6));
 		if (!memcmp(&sin6->sin6_addr.s6_addr[8], &in6.s6_addr[8], 8))
 			plen = "64";
+	}
 	if (!plen || strcmp(plen, "128") == 0)
 		return 1;
 	else {
 		rtm_addrs |= RTA_NETMASK;
 		(void)prefixlen(plen, soup);
 		return 0;
+	}
+}
 #endif
 /*
  * Interpret an argument as a network address of some kind,
  * returning 1 if a host address, 0 if a network address.
  */
 static int
 getaddr(int which, const char *s, struct hostent **hpp, struct sou *soup)
+{
 	sup su;
 	struct hostent *hp;
 	struct netent *np;
 	u_int32_t val;
 	char *t;
 	int afamily;  /* local copy of af so we can change it */
 	if (af == AF_UNSPEC) {
 		af = AF_INET;
 		aflen = sizeof(struct sockaddr_in);
+	}
 	afamily = af;
 	rtm_addrs |= which;
 	switch (which) {
 	case RTA_DST:
 		su = soup->so_dst;
 		break;
 	case RTA_GATEWAY:
 		su = soup->so_gate;
 		break;
 	case RTA_NETMASK:
 		su = soup->so_mask;
 		break;
 	case RTA_GENMASK:
 		su = soup->so_genmask;
 		break;
 	case RTA_IFP:
 		su = soup->so_ifp;
 		afamily = AF_LINK;
 		break;
 	case RTA_IFA:
 		su = soup->so_ifa;
 		su->sa.sa_family = af;
 		break;
 #ifndef SMALL
 	case RTA_TAG:
 		su = soup->so_mpls;
 		afamily = AF_MPLS;
 		break;
 #endif
 	default:
 		su = NULL;
 		usage("Internal Error");
 		/*NOTREACHED*/
+	}
 	su->sa.sa_len = aflen;
 	su->sa.sa_family = afamily; /* cases that don't want it have left already */
 	if (strcmp(s, "default") == 0) {
 		switch (which) {
 		case RTA_DST:
 			forcenet++;
 			(void)getaddr(RTA_NETMASK, s, 0, soup);
 			break;
 		case RTA_NETMASK:
 		case RTA_GENMASK:
 			su->sa.sa_len = 0;
+		}
 		return 0;
+	}
 	switch (afamily) {
 #ifdef INET6
 	case AF_INET6:
+	    {
 		struct addrinfo hints, *res;
 		char *slash = 0;
 		if (which == RTA_DST && (slash = (strrchr(s, '/'))) != 0)
 			*slash = '\0';
 		memset(&hints, 0, sizeof(hints));
 		hints.ai_family = afamily;	/*AF_INET6*/
 		hints.ai_flags = AI_NUMERICHOST;
 		hints.ai_socktype = SOCK_DGRAM;		/*dummy*/
 		if (getaddrinfo(s, "0", &hints, &res) != 0) {
 			hints.ai_flags = 0;
 			if (slash) {
 				*slash = '/';
 				slash = 0;
+			}
 			if (getaddrinfo(s, "0", &hints, &res) != 0)
 				errx(EXIT_FAILURE, "%s: bad value", s);
+		}
 		if (slash)
 			*slash = '/';
 		if (sizeof(su->sin6) != res->ai_addrlen)
 			errx(EXIT_FAILURE, "%s: bad value", s);
 		if (res->ai_next) {
 			errx(EXIT_FAILURE,
 			    "%s: address resolved to multiple values", s);
+		}
 		memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
 		freeaddrinfo(res);
 		inet6_putscopeid(&su->sin6, INET6_IS_ADDR_LINKLOCAL|
 		    INET6_IS_ADDR_MC_LINKLOCAL);
 		if (hints.ai_flags == AI_NUMERICHOST) {
 			if (slash)
 				return prefixlen(slash + 1, soup);
 			if (which == RTA_DST)
 				return inet6_makenetandmask(&su->sin6, soup);
 			return 0;
 		} else
 			return 1;
+	    }
 #endif
 	case PF_ROUTE:
 		su->sa.sa_len = sizeof(*su);
 		sockaddr(s, &su->sa);
 		return 1;
 #ifndef SMALL
 	case AF_APPLETALK:
 		t = strchr (s, '.');
 		if (!t) {
 badataddr:
 			errx(EXIT_FAILURE, "bad address: %s", s);
+		}
 		val = atoi (s);
 		if (val > 65535)
 			goto badataddr;
 		su->sat.sat_addr.s_net = val;
 		val = atoi (t);
 		if (val > 256)
 			goto badataddr;
 		su->sat.sat_addr.s_node = val;
 		rtm_addrs |= RTA_NETMASK;
 		return(forcehost || su->sat.sat_addr.s_node != 0);
 	case AF_MPLS:
 		if (which == RTA_DST)
 			soup->so_dst = readtag(su, s);
 		else if (which == RTA_TAG)
 			soup->so_mpls = readtag(su, s);
 		else
 			errx(EXIT_FAILURE, "MPLS can be used only as "
 			    "DST or TAG");
 		return 1;
 #endif
 	case AF_LINK:
 		link_addr(s, &su->sdl);
 		return 1;
 	case AF_INET:
 	default:
 		break;
+	}
 	if (hpp == NULL)
 		hpp = &hp;
 	*hpp = NULL;
 	if ((t = strchr(s, '/')) != NULL && which == RTA_DST) {
 		*t = '\0';
 		if (forcenet == 0) {
 			if ((val = inet_addr(s)) != INADDR_NONE) {
 				inet_makenetandmask(htonl(val), &su->sin, soup);
 				return prefixlen(&t[1], soup);
+			}
 		} else {
 			if ((val = inet_network(s)) != INADDR_NONE) {
 				inet_makenetandmask(val, &su->sin, soup);
 				return prefixlen(&t[1], soup);
+			}
+		}
 		*t = '/';
+	}
 	if (inet_aton(s, &su->sin.sin_addr) &&
 	    (which != RTA_DST || forcenet == 0)) {
 		val = su->sin.sin_addr.s_addr;
 		if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
 			return 1;
 		else {
 			val = ntohl(val);
 			goto netdone;
+		}
+	}
 	if ((val = inet_network(s)) != INADDR_NONE ||
 	    ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) {
 netdone:
 		if (which == RTA_DST)
 			inet_makenetandmask(val, &su->sin, soup);
 		return 0;
+	}
 	hp = gethostbyname(s);
 	if (hp) {
 		*hpp = hp;
 		su->sin.sin_family = hp->h_addrtype;
 		memmove(&su->sin.sin_addr, hp->h_addr, hp->h_length);
 		return 1;
+	}
 	errx(EXIT_FAILURE, "%s: bad value", s);
 	/*NOTREACHED*/
+}
 #ifndef SMALL
 static sup
 readtag(sup su, const char *s)
+{
 	char *p, *n, *norig;
 	int mplssize = 0;
 	sup retsu = su;
 	n = strdup(s);
 	if (n == NULL)
 		errx(EXIT_FAILURE, "%s: Cannot allocate memory", s);
 	norig = n;
 	for (uint i = 0; i < strlen(n); i++)
 		if(n[i] == ',')
 			mplssize++;
 #define MPLS_NEW_SIZE (sizeof(struct sockaddr_mpls) + \
     mplssize * sizeof(union mpls_shim))
 	if (mplssize != 0 && sizeof(union sockunion) < MPLS_NEW_SIZE) {
 		free(su);
 		retsu = malloc(MPLS_NEW_SIZE);
 		retsu->smpls.smpls_family = AF_MPLS;
+	}
 	retsu->smpls.smpls_len = MPLS_NEW_SIZE;
 	mplssize = 0;
 	while ((p = strchr(n, ',')) != NULL) {
 		p[0] = '\0';
 		addtag(retsu, n, mplssize);
 		n = p + 1;
 		mplssize++;
+	}
 	addtag(retsu, n, mplssize);
 	free(norig);
 	return retsu;
+}
 static void
 addtag(sup su, const char *s, int where)
+{
 	union mpls_shim *ms = &su->smpls.smpls_addr;
 	if (atoi(s) < 0 || atoi(s) >= (1 << 20))
 		errx(EXIT_FAILURE, "%s: Bad tag", s);
 	ms[where].s_addr = 0;
 	ms[where].shim.label = atoi(s);
 	ms[where].s_addr = htonl(ms[where].s_addr);
+}
 #endif	/* SMALL */
 int
 prefixlen(const char *s, struct sou *soup)
+{
 	int max, len = atoi(s);
 #ifdef INET6
 	int q, r;
 #endif
 	switch (af) {
 	case AF_INET:
 		max = sizeof(struct in_addr) * 8;
 		break;
 #ifdef INET6
 	case AF_INET6:
 		max = sizeof(struct in6_addr) * 8;
 		break;
 #endif
 	default:
 		errx(EXIT_FAILURE, "prefixlen is not supported with af %d", af);
 		/*NOTREACHED*/
+	}
 	rtm_addrs |= RTA_NETMASK;
 	if (len < -1 || len > max)
 		errx(EXIT_FAILURE, "%s: bad value", s);
 #ifdef INET6
 	q = len >> 3;
 	r = len & 7;
 #endif
 	switch (af) {
 	case AF_INET:
 		memset(soup->so_mask, 0, sizeof(*soup->so_mask));
 		soup->so_mask->sin.sin_family = AF_INET;
 		soup->so_mask->sin.sin_len = sizeof(struct sockaddr_in);
 		soup->so_mask->sin.sin_addr.s_addr = (len == 0 ? 0
 				: htonl(0xffffffff << (32 - len)));
 		break;
 #ifdef INET6
 	case AF_INET6:
 		soup->so_mask->sin6.sin6_family = AF_INET6;
 		soup->so_mask->sin6.sin6_len = sizeof(struct sockaddr_in6);
 		memset(&soup->so_mask->sin6.sin6_addr, 0,
 			sizeof(soup->so_mask->sin6.sin6_addr));
 		if (q > 0)
 			memset(&soup->so_mask->sin6.sin6_addr, 0xff, q);
 		if (r > 0)
 			*((u_char *)&soup->so_mask->sin6.sin6_addr + q) =
 			    (0xff00 >> r) & 0xff;
 		break;
 #endif
+	}
 	return len == max;
+}
 #ifndef SMALL
 static void
 interfaces(void)
+{
 	size_t needed;
 	int mib[6];
 	char *buf, *lim, *next;
 	struct rt_msghdr *rtm;
 	mib[0] = CTL_NET;
 	mib[1] = PF_ROUTE;
 	mib[2] = 0;		/* protocol */
 	mib[3] = 0;		/* wildcard address family */
 	mib[4] = NET_RT_IFLIST;
 	mib[5] = 0;		/* no flags */
 	if (prog_sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 		err(EXIT_FAILURE, "route-sysctl-estimate");
 	if (needed) {
 		if ((buf = malloc(needed)) == NULL)
 			err(EXIT_FAILURE, "malloc");
 		if (prog_sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
 			err(EXIT_FAILURE,
 			    "actual retrieval of interface table");
+		}
 		lim = buf + needed;
 		for (next = buf; next < lim; next += rtm->rtm_msglen) {
 			rtm = (struct rt_msghdr *)next;
 			print_rtmsg(rtm, rtm->rtm_msglen);
+		}
 		free(buf);
+	}
+}
 static void
 monitor(int argc, char * const *argv)
+{
 	int i, n;
 	union {
 		char msg[2048];
 		struct rt_msghdr hdr;
 	} u;
 	int count = 0;
 	/* usage: route monitor [-c <count>] */
 	/* eat "monitor" */
 	argc -= 1;
 	argv += 1;
 	/* parse [-c <count>] */
 	if (argc > 0) {
 		if (argc != 2)
 			usage(argv[0]);
 		if (strcmp(argv[0], "-c") != 0)
 			usage(argv[0]);
 		count = atoi(argv[1]);
+	}
 	verbose = 1;
 	if (debugonly) {
 		interfaces();
 		exit(0);
+	}
 	for(i = 0; count == 0 || i < count; i++) {
 		time_t now;
 		n = prog_read(sock, &u, sizeof(u));
 		if (n == -1) {
 			warn("read");
 			continue;
+		}
 		now = time(NULL);
 		(void)printf("got message of size %d on %s", n, ctime(&now));
 		print_rtmsg(&u.hdr, n);
+	}
+}
 #endif /* SMALL */
 struct {
 	struct	rt_msghdr m_rtm;
 	char	m_space[512];
 } m_rtmsg;
 static int
 rtmsg(int cmd, int flags, struct sou *soup)
+{
 	static int seq;
 	int rlen;
 	char *cp = m_rtmsg.m_space;
 	int l;
 #define NEXTADDR(w, u) \
 	if (rtm_addrs & (w)) {\
 	    l = RT_ROUNDUP(u->sa.sa_len); memmove(cp, u, l); cp += l;\
 	    if (verbose && ! shortoutput) sodump(u,#u);\
+	}
 	errno = 0;
 	memset(&m_rtmsg, 0, sizeof(m_rtmsg));
 	if (cmd == 'a')
 		cmd = RTM_ADD;
 	else if (cmd == 'c')
 		cmd = RTM_CHANGE;
 	else if (cmd == 'g') {
 #ifdef	SMALL
 		return -1;
 #else	/* SMALL */
 		cmd = RTM_GET;
 		if (soup->so_ifp->sa.sa_family == AF_UNSPEC) {
 			soup->so_ifp->sa.sa_family = AF_LINK;
 			soup->so_ifp->sa.sa_len = sizeof(struct sockaddr_dl);
 			rtm_addrs |= RTA_IFP;
+		}
 #endif	/* SMALL */
 	} else
 		cmd = RTM_DELETE;
 #define rtm m_rtmsg.m_rtm
 	rtm.rtm_type = cmd;
 	rtm.rtm_flags = flags;
 	rtm.rtm_version = RTM_VERSION;
 	rtm.rtm_seq = ++seq;
 	rtm.rtm_addrs = rtm_addrs;
 	rtm.rtm_rmx = rt_metrics;
 	rtm.rtm_inits = rtm_inits;
 	if (rtm_addrs & RTA_NETMASK)
 		mask_addr(soup);
 	NEXTADDR(RTA_DST, soup->so_dst);
 	NEXTADDR(RTA_GATEWAY, soup->so_gate);
 	NEXTADDR(RTA_NETMASK, soup->so_mask);
 	NEXTADDR(RTA_GENMASK, soup->so_genmask);
 	NEXTADDR(RTA_IFP, soup->so_ifp);
 	NEXTADDR(RTA_IFA, soup->so_ifa);
 #ifndef SMALL
 	NEXTADDR(RTA_TAG, soup->so_mpls);
 #endif
 	rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
 	if (verbose && ! shortoutput) {
 		if (rtm_addrs)
 			putchar('\n');
 		print_rtmsg(&rtm, l);
+	}
 	if (debugonly)
 		return 0;
 	do {
 		rlen = prog_write(sock, (char *)&m_rtmsg, l);
 	} while (rlen == -1 && errno == ENOBUFS);
 	if (rlen == -1) {
 		warnx("writing to routing socket: %s", route_strerror(errno));
 		return -1;
+	}
 	if (rlen < l) {
 		warnx("write to routing socket, got %d for rlen", rlen);
 		return 1;
+	}
 #ifndef	SMALL
 	if (cmd == RTM_GET) {
 		do {
 			l = prog_read(sock,
 			    (char *)&m_rtmsg, sizeof(m_rtmsg));
 		} while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
 		if (l < 0)
 			err(EXIT_FAILURE, "read from routing socket");
 		else
 			return print_getmsg(&rtm, l, soup);
+	}
 #endif	/* SMALL */
 #undef rtm
 	return 0;
+}
 static void
 mask_addr(struct sou *soup)
+{
 	int olen = soup->so_mask->sa.sa_len;
 	char *cp1 = olen + (char *)soup->so_mask, *cp2;
 	for (soup->so_mask->sa.sa_len = 0; cp1 > (char *)soup->so_mask; )
 		if (*--cp1 != 0) {
 			soup->so_mask->sa.sa_len = 1 + cp1 - (char *)soup->so_mask;
 			break;
+		}
 	if ((rtm_addrs & RTA_DST) == 0)
 		return;
 	switch (soup->so_dst->sa.sa_family) {
 	case AF_INET:
 #ifdef INET6
 	case AF_INET6:
 #endif
 #ifndef SMALL
 	case AF_APPLETALK:
 #endif /* SMALL */
 	case 0:
 		return;
+	}
 	cp1 = soup->so_mask->sa.sa_len + 1 + (char *)soup->so_dst;
 	cp2 = soup->so_dst->sa.sa_len + 1 + (char *)soup->so_dst;
 	while (cp2 > cp1)
 		*--cp2 = 0;
 	cp2 = soup->so_mask->sa.sa_len + 1 + (char *)soup->so_mask;
 	while (cp1 > soup->so_dst->sa.sa_data)
 		*--cp1 &= *--cp2;
+}
 const char * const msgtypes[] = {
 	[RTM_ADD] = "RTM_ADD: Add Route",
 	[RTM_DELETE] = "RTM_DELETE: Delete Route",
 	[RTM_CHANGE] = "RTM_CHANGE: Change Metrics, Flags or Gateway",
 	[RTM_GET] = "RTM_GET: Report Metrics",
 	[RTM_LOSING] = "RTM_LOSING: Kernel Suspects Partitioning",
 	[RTM_REDIRECT] = "RTM_REDIRECT: Told to use different route",
 	[RTM_MISS] = "RTM_MISS: Lookup failed on this address",
 	[RTM_LOCK] = "RTM_LOCK: fix specified metrics",
 	[RTM_OLDADD] = "RTM_OLDADD: caused by SIOCADDRT",
 	[RTM_OLDDEL] = "RTM_OLDDEL: caused by SIOCDELRT",
 	[RTM_NEWADDR] = "RTM_NEWADDR: address being added to iface",
 	[RTM_DELADDR] = "RTM_DELADDR: address being removed from iface",
 	[RTM_OOIFINFO] = "RTM_OOIFINFO: iface status change (pre-1.5)",
 	[RTM_OIFINFO] = "RTM_OIFINFO: iface status change (pre-64bit time)",
 	[RTM_IFANNOUNCE] = "RTM_IFANNOUNCE: iface arrival/departure",
 	[RTM_IEEE80211] = "RTM_IEEE80211: IEEE80211 wireless event",
 	[RTM_IFINFO] = "RTM_IFINFO: iface status change",
 	[RTM_CHGADDR] = "RTM_CHGADDR: address being changed on iface",
 };
 const char metricnames[] =
 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu";
 const char routeflags[] =
 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CONNECTED\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016CLONED\017PROTO2\020PROTO1\023LOCAL\024BROADCAST";
 const char ifnetflags[] =
 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST";
 const char addrnames[] =
 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD\011TAG";
 #ifndef SMALL
 static const char *
 linkstate(struct if_msghdr *ifm)
+{
 	static char buf[64];
 	switch (ifm->ifm_data.ifi_link_state) {
 	case LINK_STATE_UNKNOWN:
 		return "carrier: unknown";
 	case LINK_STATE_DOWN:
 		return "carrier: no carrier";
 	case LINK_STATE_UP:
 		return "carrier: active";
 	default:
 		(void)snprintf(buf, sizeof(buf), "carrier: 0x%x",
 		    ifm->ifm_data.ifi_link_state);
 		return buf;
+	}
+}
 #endif /* SMALL */
 static void
 print_rtmsg(struct rt_msghdr *rtm, int msglen)
+{
 	struct if_msghdr *ifm;
 	struct ifa_msghdr *ifam;
 	struct if_announcemsghdr *ifan;
 	union {
 		struct ieee80211_join_event join;
 		struct ieee80211_leave_event leave;
 		struct ieee80211_replay_event replay;
 		struct ieee80211_michael_event michael;
 	} ev;
 	size_t evlen = 0;
 	if (verbose == 0)
 		return;
 	if (rtm->rtm_version != RTM_VERSION) {
 		(void)printf("routing message version %d not understood\n",
 		    rtm->rtm_version);
 		return;
+	}
 	if (msgtypes[rtm->rtm_type])
 		(void)printf("%s: ", msgtypes[rtm->rtm_type]);
 	else
 		(void)printf("#%d: ", rtm->rtm_type);
 	(void)printf("len %d, ", rtm->rtm_msglen);
 	switch (rtm->rtm_type) {
 	case RTM_IFINFO:
 		ifm = (struct if_msghdr *)rtm;
 		(void)printf("if# %d, %s, flags: ", ifm->ifm_index,
 #ifdef SMALL
 		    ""
 #else
 		    linkstate(ifm)
 #endif /* SMALL */
 		    );
 		bprintf(stdout, ifm->ifm_flags, ifnetflags);
 		pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
 		break;
 	case RTM_NEWADDR:
 	case RTM_DELADDR:
 	case RTM_CHGADDR:
 		ifam = (struct ifa_msghdr *)rtm;
 		(void)printf("pid %d, metric %d, flags: ",
 		    ifam->ifam_pid, ifam->ifam_metric);
 		bprintf(stdout, ifam->ifam_flags, routeflags);
 		pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
 		break;
 	case RTM_IEEE80211:
 		ifan = (struct if_announcemsghdr *)rtm;
 		(void)printf("if# %d, what: ", ifan->ifan_index);
 		switch (ifan->ifan_what) {
 		case RTM_IEEE80211_ASSOC:
 			printf("associate");
 			break;
 		case RTM_IEEE80211_REASSOC:
 			printf("re-associate");
 			break;
 		case RTM_IEEE80211_DISASSOC:
 			printf("disassociate");
 			break;
 		case RTM_IEEE80211_SCAN:
 			printf("scan complete");
 			break;
 		case RTM_IEEE80211_JOIN:
 			evlen = sizeof(ev.join);
 			printf("join");
 			break;
 		case RTM_IEEE80211_LEAVE:
 			evlen = sizeof(ev.leave);
 			printf("leave");
 			break;
 		case RTM_IEEE80211_MICHAEL:
 			evlen = sizeof(ev.michael);
 			printf("michael");
 			break;
 		case RTM_IEEE80211_REPLAY:
 			evlen = sizeof(ev.replay);
 			printf("replay");
 			break;
 		default:
 			evlen = 0;
 			printf("#%d", ifan->ifan_what);
 			break;
+		}
 		if (sizeof(*ifan) + evlen > ifan->ifan_msglen) {
 			printf(" (truncated)\n");
 			break;
+		}
 		(void)memcpy(&ev, (ifan + 1), evlen);
 		switch (ifan->ifan_what) {
 		case RTM_IEEE80211_JOIN:
 		case RTM_IEEE80211_LEAVE:
 			printf(" mac %" PRIETHER,
 			    PRIETHER_ARGS(ev.join.iev_addr));
 			break;
 		case RTM_IEEE80211_REPLAY:
 		case RTM_IEEE80211_MICHAEL:
 			printf(" src %" PRIETHER " dst %" PRIETHER
 			       " cipher %" PRIu8 " keyix %" PRIu8,
 			       PRIETHER_ARGS(ev.replay.iev_src),
 			       PRIETHER_ARGS(ev.replay.iev_dst),
 			       ev.replay.iev_cipher,
 			       ev.replay.iev_keyix);
 			if (ifan->ifan_what == RTM_IEEE80211_REPLAY) {
 				printf(" key rsc %#" PRIx64
 				       " frame rsc %#" PRIx64,
 				       ev.replay.iev_keyrsc, ev.replay.iev_rsc);
+			}
 			break;
 		default:
 			break;
+		}
 		printf("\n");
 		break;
 	case RTM_IFANNOUNCE:
 		ifan = (struct if_announcemsghdr *)rtm;
 		(void)printf("if# %d, what: ", ifan->ifan_index);
 		switch (ifan->ifan_what) {
 		case IFAN_ARRIVAL:
 			printf("arrival");
 			break;
 		case IFAN_DEPARTURE:
 			printf("departure");
 			break;
 		default:
 			printf("#%d", ifan->ifan_what);
 			break;
+		}
 		printf("\n");
 		break;
-	default:
+	case RTM_ADD:
 	case RTM_DELETE:
 	case RTM_GET:
 		(void)printf("pid %d, seq %d, errno %d, flags: ",
 			rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
 		bprintf(stdout, rtm->rtm_flags, routeflags);
 		pmsg_common(rtm);
 		break;
+	}
+}
 #ifndef	SMALL
 static int
 print_getmsg(struct rt_msghdr *rtm, int msglen, struct sou *soup)
+{
 	struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL, *ifa = NULL, *mpls = NULL;
 	struct sockaddr_dl *ifp = NULL;
 	struct sockaddr *sa;
 	char *cp;
 	int i;
 	if (! shortoutput) {
 		(void)printf("   route to: %s\n",
 		    routename(&soup->so_dst->sa, nflag));
+	}
 	if (rtm->rtm_version != RTM_VERSION) {
 		warnx("routing message version %d not understood",
 		    rtm->rtm_version);
 		return 1;
+	}
 	if (rtm->rtm_msglen > msglen) {
 		warnx("message length mismatch, in packet %d, returned %d",
 		    rtm->rtm_msglen, msglen);
+	}
 	if (rtm->rtm_errno)  {
 		warnx("RTM_GET: %s (errno %d)",
 		    strerror(rtm->rtm_errno), rtm->rtm_errno);
 		return 1;
+	}
 	cp = ((char *)(rtm + 1));
 	if (rtm->rtm_addrs)
 		for (i = 1; i; i <<= 1)
 			if (i & rtm->rtm_addrs) {
 				sa = (struct sockaddr *)cp;
 				switch (i) {
 				case RTA_DST:
 					dst = sa;
 					break;
 				case RTA_GATEWAY:
 					gate = sa;
 					break;
 				case RTA_NETMASK:
 					mask = sa;
 					break;
 				case RTA_IFP:
 					if (sa->sa_family == AF_LINK &&
 					   ((struct sockaddr_dl *)sa)->sdl_nlen)
 						ifp = (struct sockaddr_dl *)sa;
 					break;
 				case RTA_IFA:
 					ifa = sa;
 					break;
 				case RTA_TAG:
 					mpls = sa;
 					break;
+				}
 				RT_ADVANCE(cp, sa);
+			}
 	if (dst && mask)
 		mask->sa_family = dst->sa_family;	/* XXX */
 	if (dst && ! shortoutput)
 		(void)printf("destination: %s\n",
 		    routename(dst, nflag));
 	if (mask && ! shortoutput) {
 		int savenflag = nflag;
 		nflag = RT_NFLAG;
 		(void)printf("       mask: %s\n",
 		    routename(mask, nflag));
 		nflag = savenflag;
+	}
 	if (gate && rtm->rtm_flags & RTF_GATEWAY) {
 		const char *name;
 		name = routename(gate, nflag);
 		if (shortoutput) {
 			if (*name == '\0')
 				return 1;
 			(void)printf("%s\n", name);
 		} else
 			(void)printf("    gateway: %s\n", name);
+	}
 	if (mpls) {
 		const char *name;
 		name = routename(mpls, nflag);
 		if(shortoutput) {
 			if (*name == '\0')
 				return 1;
 			printf("%s\n", name);
 		} else
 			printf("        Tag: %s\n", name);
+	}
 	if (ifa && ! shortoutput)
 		(void)printf(" local addr: %s\n",
 		    routename(ifa, nflag));
 	if (ifp && ! shortoutput)
 		(void)printf("  interface: %.*s\n",
 		    ifp->sdl_nlen, ifp->sdl_data);
 	if (! shortoutput) {
 		(void)printf("      flags: ");
 		bprintf(stdout, rtm->rtm_flags, routeflags);
+	}
 #define lock(f)	((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
 #define msec(u)	(((u) + 500) / 1000)		/* usec to msec */
 	if (! shortoutput) {
 		(void)printf("\n%s\n", "\
  recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire");
 		printf("%8"PRId64"%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
 		printf("%8"PRId64"%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
 		printf("%8"PRId64"%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
 		printf("%8"PRId64"%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
 		printf("%8"PRId64"%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
 		printf("%8"PRId64"%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
 		printf("%8"PRId64"%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
 		if (rtm->rtm_rmx.rmx_expire)
 			rtm->rtm_rmx.rmx_expire -= time(0);
 		printf("%8"PRId64"%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
+	}
 #undef lock
 #undef msec
 #define	RTA_IGN	(RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
 	if (shortoutput)
 		return (rtm->rtm_addrs & RTF_GATEWAY) == 0;
 	else if (verbose)
 		pmsg_common(rtm);
 	else if (rtm->rtm_addrs &~ RTA_IGN) {
 		(void)printf("sockaddrs: ");
 		bprintf(stdout, rtm->rtm_addrs, addrnames);
 		putchar('\n');
+	}
 	return 0;
 #undef	RTA_IGN
+}
 #endif	/* SMALL */
 void
 pmsg_common(struct rt_msghdr *rtm)
+{
 	(void)printf("\nlocks: ");
 	bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
 	(void)printf(" inits: ");
 	bprintf(stdout, rtm->rtm_inits, metricnames);
 	pmsg_addrs((char *)(rtm + 1), rtm->rtm_addrs);
+}
 static void
 extract_addrs(const char *cp, int addrs, const struct sockaddr *sa[], int *nmfp)
+{
 	int i, nmf = -1;
 	for (i = 0; i < RTAX_MAX; i++) {
 		if ((1 << i) & addrs) {
 			sa[i] = (const struct sockaddr *)cp;
 			if ((i == RTAX_DST || i == RTAX_IFA) &&
 			    nmf == -1)
 				nmf = sa[i]->sa_family;
 			RT_ADVANCE(cp, sa[i]);
 		} else
 			sa[i] = NULL;
+	}
 	if (nmfp != NULL)
 		*nmfp = nmf;
+}
 static void
 pmsg_addrs(const char *cp, int addrs)
+{
 	const struct sockaddr *sa[RTAX_MAX];
 	int i, nmf;
 	if (addrs != 0) {
 		(void)printf("\nsockaddrs: ");
 		bprintf(stdout, addrs, addrnames);
 		(void)putchar('\n');
 		extract_addrs(cp, addrs, sa, &nmf);
 		for (i = 0; i < RTAX_MAX; i++) {
 			if (sa[i] == NULL)
 				continue;
 			if (i == RTAX_NETMASK && sa[i]->sa_len)
 				(void)printf(" %s",
 				    netmask_string(sa[i], -1, nmf));
 			else
 				(void)printf(" %s",
 				    routename(sa[i], nflag));
+		}
+	}
 	(void)putchar('\n');
 	(void)fflush(stdout);
+}
 static void
 bprintf(FILE *fp, int b, const char *f)
+{
 	int i;
 	int gotsome = 0;
 	const uint8_t *s = (const uint8_t *)f;
 	if (b == 0) {
 		fputs("none", fp);
 		return;
+	}
 	while ((i = *s++) != 0) {
 		if (b & (1 << (i-1))) {
 			if (gotsome == 0)
 				i = '<';
 			else
 				i = ',';
 			(void)putc(i, fp);
 			gotsome = 1;
 			for (; (i = *s) > 32; s++)
 				(void)putc(i, fp);
 		} else
 			while (*s > 32)
 				s++;
+	}
 	if (gotsome)
 		(void)putc('>', fp);
+}
 int
 keyword(const char *cp)
+{
 	struct keytab *kt = keywords;
 	while (kt->kt_cp && strcmp(kt->kt_cp, cp))
 		kt++;
 	return kt->kt_i;
+}
 static void
 sodump(sup su, const char *which)
+{
 #ifdef INET6
 	char ntop_buf[NI_MAXHOST];
 #endif
 	switch (su->sa.sa_family) {
 	case AF_INET:
 		(void)printf("%s: inet %s; ",
 		    which, inet_ntoa(su->sin.sin_addr));
 		break;
 #ifndef SMALL
 	case AF_APPLETALK:
 		(void)printf("%s: atalk %d.%d; ",
 		    which, su->sat.sat_addr.s_net, su->sat.sat_addr.s_node);
 		break;
 #endif
 	case AF_LINK:
 		(void)printf("%s: link %s; ",
 		    which, link_ntoa(&su->sdl));
 		break;
 #ifdef INET6
 	case AF_INET6:
 		(void)printf("%s: inet6 %s; ",
 		    which, inet_ntop(AF_INET6, &su->sin6.sin6_addr,
 				     ntop_buf, sizeof(ntop_buf)));
 		break;
 #endif
 #ifndef SMALL
 	case AF_MPLS:
+	    {
 		union mpls_shim ms;
 		const union mpls_shim *pms;
 		int psize = sizeof(struct sockaddr_mpls);
 		ms.s_addr = ntohl(su->smpls.smpls_addr.s_addr);
 		printf("%s: mpls %u; ",
 		    which, ms.shim.label);
 		pms = &su->smpls.smpls_addr;
 		while(psize < su->smpls.smpls_len) {
 			pms++;
 			ms.s_addr = ntohl(pms->s_addr);
 			printf("%u; ", ms.shim.label);
 			psize += sizeof(ms);
+		}
 		break;
+	    }
 #endif /* SMALL */
 	default:
 		(void)printf("%s: (%d) %s; ",
 		    which, su->sa.sa_family, any_ntoa(&su->sa));
+	}
 	(void)fflush(stdout);
+}
 /* States*/
 #define VIRGIN	0
 #define GOTONE	1
 #define GOTTWO	2
 /* Inputs */
 #define	DIGIT	(4*0)
 #define	END	(4*1)
 #define DELIM	(4*2)
 static void
 sockaddr(const char *addr, struct sockaddr *sa)
+{
 	char *cp = (char *)sa;
 	int size = sa->sa_len;
 	char *cplim = cp + size;
 	int byte = 0, state = VIRGIN, new = 0;
 	(void)memset(cp, 0, size);
 	cp++;
 	do {
 		if ((*addr >= '0') && (*addr <= '9')) {
 			new = *addr - '0';
 		} else if ((*addr >= 'a') && (*addr <= 'f')) {
 			new = *addr - 'a' + 10;
 		} else if ((*addr >= 'A') && (*addr <= 'F')) {
 			new = *addr - 'A' + 10;
 		} else if (*addr == 0)
 			state |= END;
 		else
 			state |= DELIM;
 		addr++;
 		switch (state /* | INPUT */) {
 		case GOTTWO | DIGIT:
 			*cp++ = byte; /*FALLTHROUGH*/
 		case VIRGIN | DIGIT:
 			state = GOTONE; byte = new; continue;
 		case GOTONE | DIGIT:
 			state = GOTTWO; byte = new + (byte << 4); continue;
 		default: /* | DELIM */
 			state = VIRGIN; *cp++ = byte; byte = 0; continue;
 		case GOTONE | END:
 		case GOTTWO | END:
 			*cp++ = byte; /* FALLTHROUGH */
 		case VIRGIN | END:
 			break;
+		}
 		break;
 	} while (cp < cplim);
 	sa->sa_len = cp - (char *)sa;
+}