route.c revision 132671 
1/*
2 * Copyright (c) 1983, 1988, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#if 0
35#ifndef lint
36static char sccsid[] = "From: @(#)route.c	8.6 (Berkeley) 4/28/95";
37#endif /* not lint */
38#endif
39
40#include <sys/cdefs.h>
41__FBSDID("$FreeBSD: head/usr.bin/netstat/route.c 132671 2004-07-26 20:18:11Z charnier $");
42
43#include <sys/param.h>
44#include <sys/protosw.h>
45#include <sys/socket.h>
46#include <sys/time.h>
47
48#include <net/ethernet.h>
49#include <net/if.h>
50#include <net/if_var.h>
51#include <net/if_dl.h>
52#include <net/if_types.h>
53#include <net/radix.h>
54#include <net/route.h>
55
56#include <netinet/in.h>
57#include <netipx/ipx.h>
58#include <netatalk/at.h>
59#include <netgraph/ng_socket.h>
60
61#include <sys/sysctl.h>
62
63#include <arpa/inet.h>
64#include <libutil.h>
65#include <netdb.h>
66#include <stdio.h>
67#include <stdlib.h>
68#include <string.h>
69#include <unistd.h>
70#include <err.h>
71#include <time.h>
72#include "netstat.h"
73
74#define kget(p, d) (kread((u_long)(p), (char *)&(d), sizeof (d)))
75
76/*
77 * Definitions for showing gateway flags.
78 */
79struct bits {
80	u_long	b_mask;
81	char	b_val;
82} bits[] = {
83	{ RTF_UP,	'U' },
84	{ RTF_GATEWAY,	'G' },
85	{ RTF_HOST,	'H' },
86	{ RTF_REJECT,	'R' },
87	{ RTF_DYNAMIC,	'D' },
88	{ RTF_MODIFIED,	'M' },
89	{ RTF_DONE,	'd' }, /* Completed -- for routing messages only */
90	{ RTF_CLONING,	'C' },
91	{ RTF_XRESOLVE,	'X' },
92	{ RTF_LLINFO,	'L' },
93	{ RTF_STATIC,	'S' },
94	{ RTF_PROTO1,	'1' },
95	{ RTF_PROTO2,	'2' },
96	{ RTF_WASCLONED,'W' },
97	{ RTF_PRCLONING,'c' },
98	{ RTF_PROTO3,	'3' },
99	{ RTF_BLACKHOLE,'B' },
100	{ RTF_BROADCAST,'b' },
101	{ 0 , 0 }
102};
103
104typedef union {
105	long	dummy;		/* Helps align structure. */
106	struct	sockaddr u_sa;
107	u_short	u_data[128];
108} sa_u;
109
110static sa_u pt_u;
111
112int	do_rtent = 0;
113struct	rtentry rtentry;
114struct	radix_node rnode;
115struct	radix_mask rmask;
116struct	radix_node_head *rt_tables[AF_MAX+1];
117
118int	NewTree = 0;
119
120static struct sockaddr *kgetsa (struct sockaddr *);
121static void size_cols (int ef, struct radix_node *rn);
122static void size_cols_tree (struct radix_node *rn);
123static void size_cols_rtentry (struct rtentry *rt);
124static void p_tree (struct radix_node *);
125static void p_rtnode (void);
126static void ntreestuff (void);
127static void np_rtentry (struct rt_msghdr *);
128static void p_sockaddr (struct sockaddr *, struct sockaddr *, int, int);
129static const char *fmt_sockaddr (struct sockaddr *sa, struct sockaddr *mask,
130				 int flags);
131static void p_flags (int, const char *);
132static const char *fmt_flags(int f);
133static void p_rtentry (struct rtentry *);
134static u_long forgemask (u_long);
135static void domask (char *, u_long, u_long);
136
137/*
138 * Print routing tables.
139 */
140void
141routepr(u_long rtree)
142{
143	struct radix_node_head *rnh, head;
144	int i;
145
146	printf("Routing tables\n");
147
148	if (Aflag == 0 && NewTree)
149		ntreestuff();
150	else {
151		if (rtree == 0) {
152			printf("rt_tables: symbol not in namelist\n");
153			return;
154		}
155
156		kget(rtree, rt_tables);
157		for (i = 0; i <= AF_MAX; i++) {
158			if ((rnh = rt_tables[i]) == 0)
159				continue;
160			kget(rnh, head);
161			if (i == AF_UNSPEC) {
162				if (Aflag && af == 0) {
163					printf("Netmasks:\n");
164					p_tree(head.rnh_treetop);
165				}
166			} else if (af == AF_UNSPEC || af == i) {
167				size_cols(i, head.rnh_treetop);
168				pr_family(i);
169				do_rtent = 1;
170				pr_rthdr(i);
171				p_tree(head.rnh_treetop);
172			}
173		}
174	}
175}
176
177/*
178 * Print address family header before a section of the routing table.
179 */
180void
181pr_family(int af1)
182{
183	const char *afname;
184
185	switch (af1) {
186	case AF_INET:
187		afname = "Internet";
188		break;
189#ifdef INET6
190	case AF_INET6:
191		afname = "Internet6";
192		break;
193#endif /*INET6*/
194	case AF_IPX:
195		afname = "IPX";
196		break;
197	case AF_ISO:
198		afname = "ISO";
199		break;
200	case AF_APPLETALK:
201		afname = "AppleTalk";
202		break;
203	case AF_CCITT:
204		afname = "X.25";
205		break;
206	case AF_NETGRAPH:
207		afname = "Netgraph";
208		break;
209	default:
210		afname = NULL;
211		break;
212	}
213	if (afname)
214		printf("\n%s:\n", afname);
215	else
216		printf("\nProtocol Family %d:\n", af1);
217}
218
219/* column widths; each followed by one space */
220#ifndef INET6
221#define	WID_DST_DEFAULT(af) 	18	/* width of destination column */
222#define	WID_GW_DEFAULT(af)	18	/* width of gateway column */
223#define	WID_IF_DEFAULT(af)	(Wflag ? 8 : 6)	/* width of netif column */
224#else
225#define	WID_DST_DEFAULT(af) \
226	((af) == AF_INET6 ? (numeric_addr ? 33: 18) : 18)
227#define	WID_GW_DEFAULT(af) \
228	((af) == AF_INET6 ? (numeric_addr ? 29 : 18) : 18)
229#define	WID_IF_DEFAULT(af)	((af) == AF_INET6 ? 8 : (Wflag ? 8 : 6))
230#endif /*INET6*/
231
232static int wid_dst;
233static int wid_gw;
234static int wid_flags;
235static int wid_refs;
236static int wid_use;
237static int wid_mtu;
238static int wid_if;
239static int wid_expire;
240
241static void
242size_cols(int ef, struct radix_node *rn)
243{
244	wid_dst = WID_DST_DEFAULT(ef);
245	wid_gw = WID_GW_DEFAULT(ef);
246	wid_flags = 6;
247	wid_refs = 6;
248	wid_use = 8;
249	wid_mtu = 6;
250	wid_if = WID_IF_DEFAULT(ef);
251	wid_expire = 6;
252
253	if (Wflag)
254		size_cols_tree(rn);
255}
256
257static void
258size_cols_tree(struct radix_node *rn)
259{
260again:
261	kget(rn, rnode);
262	if (rnode.rn_bit < 0) {
263		if ((rnode.rn_flags & RNF_ROOT) == 0) {
264			kget(rn, rtentry);
265			size_cols_rtentry(&rtentry);
266		}
267		if ((rn = rnode.rn_dupedkey))
268			goto again;
269	} else {
270		rn = rnode.rn_right;
271		size_cols_tree(rnode.rn_left);
272		size_cols_tree(rn);
273	}
274}
275
276static void
277size_cols_rtentry(struct rtentry *rt)
278{
279	static struct ifnet ifnet, *lastif;
280	struct rtentry parent;
281	static char buffer[100];
282	const char *bp;
283	struct sockaddr *sa;
284	sa_u addr, mask;
285	int len;
286
287	/*
288	 * Don't print protocol-cloned routes unless -a.
289	 */
290	if (rt->rt_flags & RTF_WASCLONED && !aflag) {
291		kget(rt->rt_parent, parent);
292		if (parent.rt_flags & RTF_PRCLONING)
293			return;
294	}
295
296	bzero(&addr, sizeof(addr));
297	if ((sa = kgetsa(rt_key(rt))))
298		bcopy(sa, &addr, sa->sa_len);
299	bzero(&mask, sizeof(mask));
300	if (rt_mask(rt) && (sa = kgetsa(rt_mask(rt))))
301		bcopy(sa, &mask, sa->sa_len);
302	bp = fmt_sockaddr(&addr.u_sa, &mask.u_sa, rt->rt_flags);
303	len = strlen(bp);
304	wid_dst = MAX(len, wid_dst);
305
306	bp = fmt_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST);
307	len = strlen(bp);
308	wid_gw = MAX(len, wid_gw);
309
310	bp = fmt_flags(rt->rt_flags);
311	len = strlen(bp);
312	wid_flags = MAX(len, wid_flags);
313
314	if (addr.u_sa.sa_family == AF_INET || Wflag) {
315		len = snprintf(buffer, sizeof(buffer), "%ld", rt->rt_refcnt);
316		wid_refs = MAX(len, wid_refs);
317		len = snprintf(buffer, sizeof(buffer), "%lu", rt->rt_use);
318		wid_use = MAX(len, wid_use);
319		if (Wflag && rt->rt_rmx.rmx_mtu != 0) {
320			len = snprintf(buffer, sizeof(buffer),
321				       "%lu", rt->rt_rmx.rmx_mtu);
322			wid_mtu = MAX(len, wid_mtu);
323		}
324	}
325	if (rt->rt_ifp) {
326		if (rt->rt_ifp != lastif) {
327			kget(rt->rt_ifp, ifnet);
328			lastif = rt->rt_ifp;
329			len = strlen(ifnet.if_xname);
330			wid_if = MAX(len, wid_if);
331		}
332		if (rt->rt_rmx.rmx_expire) {
333			time_t expire_time;
334
335			if ((expire_time =
336			    rt->rt_rmx.rmx_expire - time(NULL)) > 0) {
337				len = snprintf(buffer, sizeof(buffer), "%d",
338					       (int)expire_time);
339				wid_expire = MAX(len, wid_expire);
340			}
341		}
342	}
343}
344
345
346/*
347 * Print header for routing table columns.
348 */
349void
350pr_rthdr(int af1)
351{
352
353	if (Aflag)
354		printf("%-8.8s ","Address");
355	if (af1 == AF_INET || Wflag) {
356		if (Wflag) {
357			printf("%-*.*s %-*.*s %-*.*s %*.*s %*.*s %*.*s %*.*s %*s\n",
358				wid_dst,	wid_dst,	"Destination",
359				wid_gw,		wid_gw,		"Gateway",
360				wid_flags,	wid_flags,	"Flags",
361				wid_refs,	wid_refs,	"Refs",
362				wid_use,	wid_use,	"Use",
363				wid_mtu,	wid_mtu,	"Mtu",
364				wid_if,		wid_if,		"Netif",
365				wid_expire,			"Expire");
366		} else {
367			printf("%-*.*s %-*.*s %-*.*s %*.*s %*.*s %*.*s %*s\n",
368				wid_dst,	wid_dst,	"Destination",
369				wid_gw,		wid_gw,		"Gateway",
370				wid_flags,	wid_flags,	"Flags",
371				wid_refs,	wid_refs,	"Refs",
372				wid_use,	wid_use,	"Use",
373				wid_if,		wid_if,		"Netif",
374				wid_expire,			"Expire");
375		}
376	} else {
377		printf("%-*.*s %-*.*s %-*.*s  %*.*s %*s\n",
378			wid_dst,	wid_dst,	"Destination",
379			wid_gw,		wid_gw,		"Gateway",
380			wid_flags,	wid_flags,	"Flags",
381			wid_if,		wid_if,		"Netif",
382			wid_expire,			"Expire");
383	}
384}
385
386static struct sockaddr *
387kgetsa(struct sockaddr *dst)
388{
389
390	kget(dst, pt_u.u_sa);
391	if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa))
392		kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len);
393	return (&pt_u.u_sa);
394}
395
396static void
397p_tree(struct radix_node *rn)
398{
399
400again:
401	kget(rn, rnode);
402	if (rnode.rn_bit < 0) {
403		if (Aflag)
404			printf("%-8.8lx ", (u_long)rn);
405		if (rnode.rn_flags & RNF_ROOT) {
406			if (Aflag)
407				printf("(root node)%s",
408				    rnode.rn_dupedkey ? " =>\n" : "\n");
409		} else if (do_rtent) {
410			kget(rn, rtentry);
411			p_rtentry(&rtentry);
412			if (Aflag)
413				p_rtnode();
414		} else {
415			p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key),
416				   NULL, 0, 44);
417			putchar('\n');
418		}
419		if ((rn = rnode.rn_dupedkey))
420			goto again;
421	} else {
422		if (Aflag && do_rtent) {
423			printf("%-8.8lx ", (u_long)rn);
424			p_rtnode();
425		}
426		rn = rnode.rn_right;
427		p_tree(rnode.rn_left);
428		p_tree(rn);
429	}
430}
431
432char	nbuf[20];
433
434static void
435p_rtnode(void)
436{
437	struct radix_mask *rm = rnode.rn_mklist;
438
439	if (rnode.rn_bit < 0) {
440		if (rnode.rn_mask) {
441			printf("\t  mask ");
442			p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask),
443				   NULL, 0, -1);
444		} else if (rm == 0)
445			return;
446	} else {
447		sprintf(nbuf, "(%d)", rnode.rn_bit);
448		printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long)rnode.rn_left, (u_long)rnode.rn_right);
449	}
450	while (rm) {
451		kget(rm, rmask);
452		sprintf(nbuf, " %d refs, ", rmask.rm_refs);
453		printf(" mk = %8.8lx {(%d),%s",
454			(u_long)rm, -1 - rmask.rm_bit, rmask.rm_refs ? nbuf : " ");
455		if (rmask.rm_flags & RNF_NORMAL) {
456			struct radix_node rnode_aux;
457			printf(" <normal>, ");
458			kget(rmask.rm_leaf, rnode_aux);
459			p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask),
460				    NULL, 0, -1);
461		} else
462		    p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask),
463				NULL, 0, -1);
464		putchar('}');
465		if ((rm = rmask.rm_mklist))
466			printf(" ->");
467	}
468	putchar('\n');
469}
470
471static void
472ntreestuff(void)
473{
474	size_t needed;
475	int mib[6];
476	char *buf, *next, *lim;
477	struct rt_msghdr *rtm;
478
479	mib[0] = CTL_NET;
480	mib[1] = PF_ROUTE;
481	mib[2] = 0;
482	mib[3] = 0;
483	mib[4] = NET_RT_DUMP;
484	mib[5] = 0;
485	if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
486		err(1, "sysctl: net.route.0.0.dump estimate");
487	}
488
489	if ((buf = malloc(needed)) == 0) {
490		errx(2, "malloc(%lu)", (unsigned long)needed);
491	}
492	if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
493		err(1, "sysctl: net.route.0.0.dump");
494	}
495	lim  = buf + needed;
496	for (next = buf; next < lim; next += rtm->rtm_msglen) {
497		rtm = (struct rt_msghdr *)next;
498		np_rtentry(rtm);
499	}
500}
501
502static void
503np_rtentry(struct rt_msghdr *rtm)
504{
505	struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
506#ifdef notdef
507	static int masks_done, banner_printed;
508#endif
509	static int old_af;
510	int af1 = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST;
511
512#ifdef notdef
513	/* for the moment, netmasks are skipped over */
514	if (!banner_printed) {
515		printf("Netmasks:\n");
516		banner_printed = 1;
517	}
518	if (masks_done == 0) {
519		if (rtm->rtm_addrs != RTA_DST ) {
520			masks_done = 1;
521			af1 = sa->sa_family;
522		}
523	} else
524#endif
525		af1 = sa->sa_family;
526	if (af1 != old_af) {
527		pr_family(af1);
528		old_af = af1;
529	}
530	if (rtm->rtm_addrs == RTA_DST)
531		p_sockaddr(sa, NULL, 0, 36);
532	else {
533		p_sockaddr(sa, NULL, rtm->rtm_flags, 16);
534		sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa);
535		p_sockaddr(sa, NULL, 0, 18);
536	}
537	p_flags(rtm->rtm_flags & interesting, "%-6.6s ");
538	putchar('\n');
539}
540
541static void
542p_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags, int width)
543{
544	const char *cp;
545
546	cp = fmt_sockaddr(sa, mask, flags);
547
548	if (width < 0 )
549		printf("%s ", cp);
550	else {
551		if (numeric_addr)
552			printf("%-*s ", width, cp);
553		else
554			printf("%-*.*s ", width, width, cp);
555	}
556}
557
558static const char *
559fmt_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags)
560{
561	static char workbuf[128];
562	const char *cp;
563
564	switch(sa->sa_family) {
565	case AF_INET:
566	    {
567		struct sockaddr_in *sockin = (struct sockaddr_in *)sa;
568
569		if ((sockin->sin_addr.s_addr == INADDR_ANY) &&
570			mask &&
571			ntohl(((struct sockaddr_in *)mask)->sin_addr.s_addr)
572				==0L)
573				cp = "default" ;
574		else if (flags & RTF_HOST)
575			cp = routename(sockin->sin_addr.s_addr);
576		else if (mask)
577			cp = netname(sockin->sin_addr.s_addr,
578				     ntohl(((struct sockaddr_in *)mask)
579					   ->sin_addr.s_addr));
580		else
581			cp = netname(sockin->sin_addr.s_addr, 0L);
582		break;
583	    }
584
585#ifdef INET6
586	case AF_INET6:
587	    {
588		struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
589		struct in6_addr *in6 = &sa6->sin6_addr;
590
591		/*
592		 * XXX: This is a special workaround for KAME kernels.
593		 * sin6_scope_id field of SA should be set in the future.
594		 */
595		if (IN6_IS_ADDR_LINKLOCAL(in6) ||
596		    IN6_IS_ADDR_MC_LINKLOCAL(in6)) {
597		    /* XXX: override is ok? */
598		    sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)&in6->s6_addr[2]);
599		    *(u_short *)&in6->s6_addr[2] = 0;
600		}
601
602		if (flags & RTF_HOST)
603		    cp = routename6(sa6);
604		else if (mask)
605		    cp = netname6(sa6,
606				  &((struct sockaddr_in6 *)mask)->sin6_addr);
607		else {
608		    cp = netname6(sa6, NULL);
609		}
610		break;
611	    }
612#endif /*INET6*/
613
614	case AF_IPX:
615	    {
616		struct ipx_addr work = ((struct sockaddr_ipx *)sa)->sipx_addr;
617		if (ipx_nullnet(satoipx_addr(work)))
618			cp = "default";
619		else
620			cp = ipx_print(sa);
621		break;
622	    }
623	case AF_APPLETALK:
624	    {
625		if (!(flags & RTF_HOST) && mask)
626			cp = atalk_print2(sa,mask,9);
627		else
628			cp = atalk_print(sa,11);
629		break;
630	    }
631	case AF_NETGRAPH:
632	    {
633		printf("%s", ((struct sockaddr_ng *)sa)->sg_data);
634		break;
635	    }
636
637	case AF_LINK:
638	    {
639		struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
640
641		if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
642		    sdl->sdl_slen == 0) {
643			(void) sprintf(workbuf, "link#%d", sdl->sdl_index);
644			cp = workbuf;
645		} else
646			switch (sdl->sdl_type) {
647
648			case IFT_ETHER:
649				if (sdl->sdl_alen == ETHER_ADDR_LEN) {
650					cp = ether_ntoa((struct ether_addr *)
651					    (sdl->sdl_data + sdl->sdl_nlen));
652					break;
653				}
654				/* FALLTHROUGH */
655			default:
656				cp = link_ntoa(sdl);
657				break;
658			}
659		break;
660	    }
661
662	default:
663	    {
664		u_char *s = (u_char *)sa->sa_data, *slim;
665		char *cq, *cqlim;
666
667		cq = workbuf;
668		slim =  sa->sa_len + (u_char *) sa;
669		cqlim = cq + sizeof(workbuf) - 6;
670		cq += sprintf(cq, "(%d)", sa->sa_family);
671		while (s < slim && cq < cqlim) {
672			cq += sprintf(cq, " %02x", *s++);
673			if (s < slim)
674			    cq += sprintf(cq, "%02x", *s++);
675		}
676		cp = workbuf;
677	    }
678	}
679
680	return (cp);
681}
682
683static void
684p_flags(int f, const char *format)
685{
686	printf(format, fmt_flags(f));
687}
688
689static const char *
690fmt_flags(int f)
691{
692	static char name[33];
693	char *flags;
694	struct bits *p = bits;
695
696	for (flags = name; p->b_mask; p++)
697		if (p->b_mask & f)
698			*flags++ = p->b_val;
699	*flags = '\0';
700	return (name);
701}
702
703static void
704p_rtentry(struct rtentry *rt)
705{
706	static struct ifnet ifnet, *lastif;
707	struct rtentry parent;
708	static char buffer[128];
709	static char prettyname[128];
710	struct sockaddr *sa;
711	sa_u addr, mask;
712
713	/*
714	 * Don't print protocol-cloned routes unless -a.
715	 */
716	if (rt->rt_flags & RTF_WASCLONED && !aflag) {
717		kget(rt->rt_parent, parent);
718		if (parent.rt_flags & RTF_PRCLONING)
719			return;
720	}
721
722	bzero(&addr, sizeof(addr));
723	if ((sa = kgetsa(rt_key(rt))))
724		bcopy(sa, &addr, sa->sa_len);
725	bzero(&mask, sizeof(mask));
726	if (rt_mask(rt) && (sa = kgetsa(rt_mask(rt))))
727		bcopy(sa, &mask, sa->sa_len);
728	p_sockaddr(&addr.u_sa, &mask.u_sa, rt->rt_flags, wid_dst);
729	p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, wid_gw);
730	snprintf(buffer, sizeof(buffer), "%%-%d.%ds ", wid_flags, wid_flags);
731	p_flags(rt->rt_flags, buffer);
732	if (addr.u_sa.sa_family == AF_INET || Wflag) {
733		printf("%*ld %*lu ", wid_refs, rt->rt_refcnt,
734				     wid_use, rt->rt_use);
735		if (Wflag) {
736			if (rt->rt_rmx.rmx_mtu != 0)
737				printf("%*lu ", wid_mtu, rt->rt_rmx.rmx_mtu);
738			else
739				printf("%*s ", wid_mtu, "");
740		}
741	}
742	if (rt->rt_ifp) {
743		if (rt->rt_ifp != lastif) {
744			kget(rt->rt_ifp, ifnet);
745			lastif = rt->rt_ifp;
746			strlcpy(prettyname, ifnet.if_xname, sizeof(prettyname));
747		}
748		printf("%*.*s", wid_if, wid_if, prettyname);
749		if (rt->rt_rmx.rmx_expire) {
750			time_t expire_time;
751
752			if ((expire_time =
753			    rt->rt_rmx.rmx_expire - time((time_t *)0)) > 0)
754				printf(" %*d", wid_expire, (int)expire_time);
755		}
756		if (rt->rt_nodes[0].rn_dupedkey)
757			printf(" =>");
758	}
759	putchar('\n');
760}
761
762char *
763routename(u_long in)
764{
765	char *cp;
766	static char line[MAXHOSTNAMELEN];
767	struct hostent *hp;
768
769	cp = 0;
770	if (!numeric_addr) {
771		hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
772			AF_INET);
773		if (hp) {
774			cp = hp->h_name;
775			trimdomain(cp, strlen(cp));
776		}
777	}
778	if (cp) {
779		strncpy(line, cp, sizeof(line) - 1);
780		line[sizeof(line) - 1] = '\0';
781	} else {
782#define C(x)	((x) & 0xff)
783		in = ntohl(in);
784		sprintf(line, "%lu.%lu.%lu.%lu",
785		    C(in >> 24), C(in >> 16), C(in >> 8), C(in));
786	}
787	return (line);
788}
789
790static u_long
791forgemask(u_long a)
792{
793	u_long m;
794
795	if (IN_CLASSA(a))
796		m = IN_CLASSA_NET;
797	else if (IN_CLASSB(a))
798		m = IN_CLASSB_NET;
799	else
800		m = IN_CLASSC_NET;
801	return (m);
802}
803
804static void
805domask(char *dst, u_long addr, u_long mask)
806{
807	int b, i;
808
809	if (!mask || (forgemask(addr) == mask)) {
810		*dst = '\0';
811		return;
812	}
813	i = 0;
814	for (b = 0; b < 32; b++)
815		if (mask & (1 << b)) {
816			int bb;
817
818			i = b;
819			for (bb = b+1; bb < 32; bb++)
820				if (!(mask & (1 << bb))) {
821					i = -1;	/* noncontig */
822					break;
823				}
824			break;
825		}
826	if (i == -1)
827		sprintf(dst, "&0x%lx", mask);
828	else
829		sprintf(dst, "/%d", 32-i);
830}
831
832/*
833 * Return the name of the network whose address is given.
834 * The address is assumed to be that of a net or subnet, not a host.
835 */
836char *
837netname(u_long in, u_long mask)
838{
839	char *cp = 0;
840	static char line[MAXHOSTNAMELEN];
841	struct netent *np = 0;
842	u_long dmask;
843	u_long i;
844
845#define	NSHIFT(m) (							\
846	(m) == IN_CLASSA_NET ? IN_CLASSA_NSHIFT :			\
847	(m) == IN_CLASSB_NET ? IN_CLASSB_NSHIFT :			\
848	(m) == IN_CLASSC_NET ? IN_CLASSC_NSHIFT :			\
849	0)
850
851	i = ntohl(in);
852	dmask = forgemask(i);
853	if (!numeric_addr && i) {
854		np = getnetbyaddr(i >> NSHIFT(mask), AF_INET);
855		if (np == NULL && mask == 0)
856			np = getnetbyaddr(i >> NSHIFT(dmask), AF_INET);
857		if (np != NULL) {
858			cp = np->n_name;
859			trimdomain(cp, strlen(cp));
860		}
861	}
862#undef NSHIFT
863	if (cp != NULL) {
864		strncpy(line, cp, sizeof(line) - 1);
865		line[sizeof(line) - 1] = '\0';
866	} else {
867		switch (dmask) {
868		case IN_CLASSA_NET:
869			if ((i & IN_CLASSA_HOST) == 0) {
870				sprintf(line, "%lu", C(i >> 24));
871				break;
872			}
873			/* FALLTHROUGH */
874		case IN_CLASSB_NET:
875			if ((i & IN_CLASSB_HOST) == 0) {
876				sprintf(line, "%lu.%lu",
877					C(i >> 24), C(i >> 16));
878				break;
879			}
880			/* FALLTHROUGH */
881		case IN_CLASSC_NET:
882			if ((i & IN_CLASSC_HOST) == 0) {
883				sprintf(line, "%lu.%lu.%lu",
884					C(i >> 24), C(i >> 16), C(i >> 8));
885				break;
886			}
887			/* FALLTHROUGH */
888		default:
889			sprintf(line, "%lu.%lu.%lu.%lu",
890				C(i >> 24), C(i >> 16), C(i >> 8), C(i));
891			break;
892		}
893	}
894	domask(line + strlen(line), i, mask);
895	return (line);
896}
897
898#ifdef INET6
899const char *
900netname6(struct sockaddr_in6 *sa6, struct in6_addr *mask)
901{
902	static char line[MAXHOSTNAMELEN];
903	u_char *p = (u_char *)mask;
904	u_char *lim;
905	int masklen, illegal = 0, flag = NI_WITHSCOPEID;
906
907	if (mask) {
908		for (masklen = 0, lim = p + 16; p < lim; p++) {
909			switch (*p) {
910			 case 0xff:
911				 masklen += 8;
912				 break;
913			 case 0xfe:
914				 masklen += 7;
915				 break;
916			 case 0xfc:
917				 masklen += 6;
918				 break;
919			 case 0xf8:
920				 masklen += 5;
921				 break;
922			 case 0xf0:
923				 masklen += 4;
924				 break;
925			 case 0xe0:
926				 masklen += 3;
927				 break;
928			 case 0xc0:
929				 masklen += 2;
930				 break;
931			 case 0x80:
932				 masklen += 1;
933				 break;
934			 case 0x00:
935				 break;
936			 default:
937				 illegal ++;
938				 break;
939			}
940		}
941		if (illegal)
942			fprintf(stderr, "illegal prefixlen\n");
943	}
944	else
945		masklen = 128;
946
947	if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr))
948		return("default");
949
950	if (numeric_addr)
951		flag |= NI_NUMERICHOST;
952	getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, line, sizeof(line),
953		    NULL, 0, flag);
954
955	if (numeric_addr)
956		sprintf(&line[strlen(line)], "/%d", masklen);
957
958	return line;
959}
960
961char *
962routename6(struct sockaddr_in6 *sa6)
963{
964	static char line[MAXHOSTNAMELEN];
965	int flag = NI_WITHSCOPEID;
966	/* use local variable for safety */
967	struct sockaddr_in6 sa6_local = {AF_INET6, sizeof(sa6_local),};
968
969	sa6_local.sin6_addr = sa6->sin6_addr;
970	sa6_local.sin6_scope_id = sa6->sin6_scope_id;
971
972	if (numeric_addr)
973		flag |= NI_NUMERICHOST;
974
975	getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len,
976		    line, sizeof(line), NULL, 0, flag);
977
978	return line;
979}
980#endif /*INET6*/
981
982/*
983 * Print routing statistics
984 */
985void
986rt_stats(u_long rtsaddr, u_long rttaddr)
987{
988	struct rtstat rtstat;
989	int rttrash;
990
991	if (rtsaddr == 0) {
992		printf("rtstat: symbol not in namelist\n");
993		return;
994	}
995	if (rttaddr == 0) {
996		printf("rttrash: symbol not in namelist\n");
997		return;
998	}
999	kread(rtsaddr, (char *)&rtstat, sizeof (rtstat));
1000	kread(rttaddr, (char *)&rttrash, sizeof (rttrash));
1001	printf("routing:\n");
1002
1003#define	p(f, m) if (rtstat.f || sflag <= 1) \
1004	printf(m, rtstat.f, plural(rtstat.f))
1005
1006	p(rts_badredirect, "\t%u bad routing redirect%s\n");
1007	p(rts_dynamic, "\t%u dynamically created route%s\n");
1008	p(rts_newgateway, "\t%u new gateway%s due to redirects\n");
1009	p(rts_unreach, "\t%u destination%s found unreachable\n");
1010	p(rts_wildcard, "\t%u use%s of a wildcard route\n");
1011#undef p
1012
1013	if (rttrash || sflag <= 1)
1014		printf("\t%u route%s not in table but not freed\n",
1015		    rttrash, plural(rttrash));
1016}
1017
1018char *
1019ipx_print(struct sockaddr *sa)
1020{
1021	u_short port;
1022	struct servent *sp = 0;
1023	const char *net = "", *host = "";
1024	char *p;
1025	u_char *q;
1026	struct ipx_addr work = ((struct sockaddr_ipx *)sa)->sipx_addr;
1027	static char mybuf[50];
1028	char cport[10], chost[15], cnet[15];
1029
1030	port = ntohs(work.x_port);
1031
1032	if (ipx_nullnet(work) && ipx_nullhost(work)) {
1033
1034		if (port) {
1035			if (sp)
1036				sprintf(mybuf, "*.%s", sp->s_name);
1037			else
1038				sprintf(mybuf, "*.%x", port);
1039		} else
1040			sprintf(mybuf, "*.*");
1041
1042		return (mybuf);
1043	}
1044
1045	if (ipx_wildnet(work))
1046		net = "any";
1047	else if (ipx_nullnet(work))
1048		net = "*";
1049	else {
1050		q = work.x_net.c_net;
1051		sprintf(cnet, "%02x%02x%02x%02x",
1052			q[0], q[1], q[2], q[3]);
1053		for (p = cnet; *p == '0' && p < cnet + 8; p++)
1054			continue;
1055		net = p;
1056	}
1057
1058	if (ipx_wildhost(work))
1059		host = "any";
1060	else if (ipx_nullhost(work))
1061		host = "*";
1062	else {
1063		q = work.x_host.c_host;
1064		sprintf(chost, "%02x%02x%02x%02x%02x%02x",
1065			q[0], q[1], q[2], q[3], q[4], q[5]);
1066		for (p = chost; *p == '0' && p < chost + 12; p++)
1067			continue;
1068		host = p;
1069	}
1070
1071	if (port) {
1072		if (strcmp(host, "*") == 0)
1073			host = "";
1074		if (sp)
1075			snprintf(cport, sizeof(cport),
1076				"%s%s", *host ? "." : "", sp->s_name);
1077		else
1078			snprintf(cport, sizeof(cport),
1079				"%s%x", *host ? "." : "", port);
1080	} else
1081		*cport = 0;
1082
1083	snprintf(mybuf, sizeof(mybuf), "%s.%s%s", net, host, cport);
1084	return(mybuf);
1085}
1086
1087char *
1088ipx_phost(struct sockaddr *sa)
1089{
1090	struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)sa;
1091	struct sockaddr_ipx work;
1092	static union ipx_net ipx_zeronet;
1093	char *p;
1094	struct ipx_addr in;
1095
1096	work = *sipx;
1097	in = work.sipx_addr;
1098
1099	work.sipx_addr.x_port = 0;
1100	work.sipx_addr.x_net = ipx_zeronet;
1101	p = ipx_print((struct sockaddr *)&work);
1102	if (strncmp("*.", p, 2) == 0) p += 2;
1103
1104	return(p);
1105}
1106
1107void
1108upHex(char *p0)
1109{
1110	char *p = p0;
1111
1112	for (; *p; p++)
1113		switch (*p) {
1114
1115		case 'a':
1116		case 'b':
1117		case 'c':
1118		case 'd':
1119		case 'e':
1120		case 'f':
1121			*p += ('A' - 'a');
1122			break;
1123		}
1124}
1125