route.c revision 78309 
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#ifndef lint
35#if 0
36static char sccsid[] = "From: @(#)route.c	8.6 (Berkeley) 4/28/95";
37#endif
38static const char rcsid[] =
39  "$FreeBSD: head/usr.bin/netstat/route.c 78309 2001-06-15 23:07:59Z assar $";
40#endif /* not lint */
41
42#include <sys/param.h>
43#include <sys/protosw.h>
44#include <sys/socket.h>
45#include <sys/time.h>
46
47#include <net/if.h>
48#include <net/if_var.h>
49#include <net/if_dl.h>
50#include <net/if_types.h>
51#include <net/route.h>
52
53#include <netinet/in.h>
54#include <netipx/ipx.h>
55#include <netatalk/at.h>
56#include <netgraph/ng_socket.h>
57
58#ifdef NS
59#include <netns/ns.h>
60#endif
61
62#include <sys/sysctl.h>
63
64#include <arpa/inet.h>
65#include <libutil.h>
66#include <netdb.h>
67#include <stdio.h>
68#include <stdlib.h>
69#include <string.h>
70#include <unistd.h>
71#include <err.h>
72#include <time.h>
73#include "netstat.h"
74
75#define kget(p, d) (kread((u_long)(p), (char *)&(d), sizeof (d)))
76
77
78/* alignment constraint for routing socket */
79#define ROUNDUP(a) \
80       ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
81#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
82
83/*
84 * Definitions for showing gateway flags.
85 */
86struct bits {
87	u_long	b_mask;
88	char	b_val;
89} bits[] = {
90	{ RTF_UP,	'U' },
91	{ RTF_GATEWAY,	'G' },
92	{ RTF_HOST,	'H' },
93	{ RTF_REJECT,	'R' },
94	{ RTF_DYNAMIC,	'D' },
95	{ RTF_MODIFIED,	'M' },
96	{ RTF_DONE,	'd' }, /* Completed -- for routing messages only */
97	{ RTF_CLONING,	'C' },
98	{ RTF_XRESOLVE,	'X' },
99	{ RTF_LLINFO,	'L' },
100	{ RTF_STATIC,	'S' },
101	{ RTF_PROTO1,	'1' },
102	{ RTF_PROTO2,	'2' },
103	{ RTF_WASCLONED,'W' },
104	{ RTF_PRCLONING,'c' },
105	{ RTF_PROTO3,	'3' },
106	{ RTF_BLACKHOLE,'B' },
107	{ RTF_BROADCAST,'b' },
108	{ 0 }
109};
110
111typedef union {
112	long	dummy;		/* Helps align structure. */
113	struct	sockaddr u_sa;
114	u_short	u_data[128];
115} sa_u;
116
117static sa_u pt_u;
118
119int	do_rtent = 0;
120struct	rtentry rtentry;
121struct	radix_node rnode;
122struct	radix_mask rmask;
123struct	radix_node_head *rt_tables[AF_MAX+1];
124
125int	NewTree = 0;
126
127static struct sockaddr *kgetsa __P((struct sockaddr *));
128static void p_tree __P((struct radix_node *));
129static void p_rtnode __P((void));
130static void ntreestuff __P((void));
131static void np_rtentry __P((struct rt_msghdr *));
132static void p_sockaddr __P((struct sockaddr *, struct sockaddr *, int, int));
133static void p_flags __P((int, char *));
134static void p_rtentry __P((struct rtentry *));
135static u_long forgemask __P((u_long));
136static void domask __P((char *, u_long, u_long));
137
138#ifdef INET6
139char *routename6 __P((struct sockaddr_in6 *));
140char *netname6 __P((struct sockaddr_in6 *, struct in6_addr *));
141#endif /*INET6*/
142
143/*
144 * Print routing tables.
145 */
146void
147routepr(rtree)
148	u_long rtree;
149{
150	struct radix_node_head *rnh, head;
151	int i;
152
153	printf("Routing tables\n");
154
155	if (Aflag == 0 && NewTree)
156		ntreestuff();
157	else {
158		if (rtree == 0) {
159			printf("rt_tables: symbol not in namelist\n");
160			return;
161		}
162
163		kget(rtree, rt_tables);
164		for (i = 0; i <= AF_MAX; i++) {
165			if ((rnh = rt_tables[i]) == 0)
166				continue;
167			kget(rnh, head);
168			if (i == AF_UNSPEC) {
169				if (Aflag && af == 0) {
170					printf("Netmasks:\n");
171					p_tree(head.rnh_treetop);
172				}
173			} else if (af == AF_UNSPEC || af == i) {
174				pr_family(i);
175				do_rtent = 1;
176				pr_rthdr(i);
177				p_tree(head.rnh_treetop);
178			}
179		}
180	}
181}
182
183/*
184 * Print address family header before a section of the routing table.
185 */
186void
187pr_family(af)
188	int af;
189{
190	char *afname;
191
192	switch (af) {
193	case AF_INET:
194		afname = "Internet";
195		break;
196#ifdef INET6
197	case AF_INET6:
198		afname = "Internet6";
199		break;
200#endif /*INET6*/
201	case AF_IPX:
202		afname = "IPX";
203		break;
204#ifdef NS
205	case AF_NS:
206		afname = "XNS";
207		break;
208#endif
209	case AF_ISO:
210		afname = "ISO";
211		break;
212	case AF_APPLETALK:
213		afname = "AppleTalk";
214		break;
215	case AF_CCITT:
216		afname = "X.25";
217		break;
218	case AF_NETGRAPH:
219		afname = "Netgraph";
220		break;
221	default:
222		afname = NULL;
223		break;
224	}
225	if (afname)
226		printf("\n%s:\n", afname);
227	else
228		printf("\nProtocol Family %d:\n", af);
229}
230
231/* column widths; each followed by one space */
232#ifndef INET6
233#define	WID_DST(af) 	18	/* width of destination column */
234#define	WID_GW(af)	18	/* width of gateway column */
235#define	WID_IF(af)	6	/* width of netif column */
236#else
237#define	WID_DST(af) \
238	((af) == AF_INET6 ? (lflag ? 39 : (numeric_addr ? 33: 18)) : 18)
239#define	WID_GW(af) \
240	((af) == AF_INET6 ? (lflag ? 31 : (numeric_addr ? 29 : 18)) : 18)
241#define	WID_IF(af)	((af) == AF_INET6 ? 8 : 6)
242#endif /*INET6*/
243
244/*
245 * Print header for routing table columns.
246 */
247void
248pr_rthdr(af)
249	int af;
250{
251
252	if (Aflag)
253		printf("%-8.8s ","Address");
254	if (af == AF_INET || lflag)
255		if (lflag)
256			printf("%-*.*s %-*.*s %-6.6s %6.6s %8.8s %6.6s %*.*s %6s\n",
257				WID_DST(af), WID_DST(af), "Destination",
258				WID_GW(af), WID_GW(af), "Gateway",
259				"Flags", "Refs", "Use", "Mtu",
260				WID_IF(af), WID_IF(af), "Netif", "Expire");
261		else
262			printf("%-*.*s %-*.*s %-6.6s %6.6s %8.8s %*.*s %6s\n",
263				WID_DST(af), WID_DST(af), "Destination",
264				WID_GW(af), WID_GW(af), "Gateway",
265				"Flags", "Refs", "Use",
266				WID_IF(af), WID_IF(af), "Netif", "Expire");
267	else
268		printf("%-*.*s %-*.*s %-6.6s  %8.8s %6s\n",
269			WID_DST(af), WID_DST(af), "Destination",
270			WID_GW(af), WID_GW(af), "Gateway",
271			"Flags", "Netif", "Expire");
272}
273
274static struct sockaddr *
275kgetsa(dst)
276	register struct sockaddr *dst;
277{
278
279	kget(dst, pt_u.u_sa);
280	if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa))
281		kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len);
282	return (&pt_u.u_sa);
283}
284
285static void
286p_tree(rn)
287	struct radix_node *rn;
288{
289
290again:
291	kget(rn, rnode);
292	if (rnode.rn_bit < 0) {
293		if (Aflag)
294			printf("%-8.8lx ", (u_long)rn);
295		if (rnode.rn_flags & RNF_ROOT) {
296			if (Aflag)
297				printf("(root node)%s",
298				    rnode.rn_dupedkey ? " =>\n" : "\n");
299		} else if (do_rtent) {
300			kget(rn, rtentry);
301			p_rtentry(&rtentry);
302			if (Aflag)
303				p_rtnode();
304		} else {
305			p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key),
306				   NULL, 0, 44);
307			putchar('\n');
308		}
309		if ((rn = rnode.rn_dupedkey))
310			goto again;
311	} else {
312		if (Aflag && do_rtent) {
313			printf("%-8.8lx ", (u_long)rn);
314			p_rtnode();
315		}
316		rn = rnode.rn_right;
317		p_tree(rnode.rn_left);
318		p_tree(rn);
319	}
320}
321
322char	nbuf[20];
323
324static void
325p_rtnode()
326{
327	struct radix_mask *rm = rnode.rn_mklist;
328
329	if (rnode.rn_bit < 0) {
330		if (rnode.rn_mask) {
331			printf("\t  mask ");
332			p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask),
333				   NULL, 0, -1);
334		} else if (rm == 0)
335			return;
336	} else {
337		sprintf(nbuf, "(%d)", rnode.rn_bit);
338		printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long)rnode.rn_left, (u_long)rnode.rn_right);
339	}
340	while (rm) {
341		kget(rm, rmask);
342		sprintf(nbuf, " %d refs, ", rmask.rm_refs);
343		printf(" mk = %8.8lx {(%d),%s",
344			(u_long)rm, -1 - rmask.rm_bit, rmask.rm_refs ? nbuf : " ");
345		if (rmask.rm_flags & RNF_NORMAL) {
346			struct radix_node rnode_aux;
347			printf(" <normal>, ");
348			kget(rmask.rm_leaf, rnode_aux);
349			p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask),
350				    NULL, 0, -1);
351		} else
352		    p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask),
353				NULL, 0, -1);
354		putchar('}');
355		if ((rm = rmask.rm_mklist))
356			printf(" ->");
357	}
358	putchar('\n');
359}
360
361static void
362ntreestuff()
363{
364	size_t needed;
365	int mib[6];
366	char *buf, *next, *lim;
367	register struct rt_msghdr *rtm;
368
369	mib[0] = CTL_NET;
370	mib[1] = PF_ROUTE;
371	mib[2] = 0;
372	mib[3] = 0;
373	mib[4] = NET_RT_DUMP;
374	mib[5] = 0;
375	if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
376		err(1, "sysctl: net.route.0.0.dump estimate");
377	}
378
379	if ((buf = malloc(needed)) == 0) {
380		err(2, "malloc(%lu)", (unsigned long)needed);
381	}
382	if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
383		err(1, "sysctl: net.route.0.0.dump");
384	}
385	lim  = buf + needed;
386	for (next = buf; next < lim; next += rtm->rtm_msglen) {
387		rtm = (struct rt_msghdr *)next;
388		np_rtentry(rtm);
389	}
390}
391
392static void
393np_rtentry(rtm)
394	register struct rt_msghdr *rtm;
395{
396	register struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
397#ifdef notdef
398	static int masks_done, banner_printed;
399#endif
400	static int old_af;
401	int af = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST;
402
403#ifdef notdef
404	/* for the moment, netmasks are skipped over */
405	if (!banner_printed) {
406		printf("Netmasks:\n");
407		banner_printed = 1;
408	}
409	if (masks_done == 0) {
410		if (rtm->rtm_addrs != RTA_DST ) {
411			masks_done = 1;
412			af = sa->sa_family;
413		}
414	} else
415#endif
416		af = sa->sa_family;
417	if (af != old_af) {
418		pr_family(af);
419		old_af = af;
420	}
421	if (rtm->rtm_addrs == RTA_DST)
422		p_sockaddr(sa, NULL, 0, 36);
423	else {
424		p_sockaddr(sa, NULL, rtm->rtm_flags, 16);
425		sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa);
426		p_sockaddr(sa, NULL, 0, 18);
427	}
428	p_flags(rtm->rtm_flags & interesting, "%-6.6s ");
429	putchar('\n');
430}
431
432static void
433p_sockaddr(sa, mask, flags, width)
434	struct sockaddr *sa, *mask;
435	int flags, width;
436{
437	char workbuf[128], *cplim;
438	register char *cp = workbuf;
439
440	switch(sa->sa_family) {
441	case AF_INET:
442	    {
443		register struct sockaddr_in *sin = (struct sockaddr_in *)sa;
444
445		if ((sin->sin_addr.s_addr == INADDR_ANY) &&
446			mask &&
447			ntohl(((struct sockaddr_in *)mask)->sin_addr.s_addr)
448				==0L)
449				cp = "default" ;
450		else if (flags & RTF_HOST)
451			cp = routename(sin->sin_addr.s_addr);
452		else if (mask)
453			cp = netname(sin->sin_addr.s_addr,
454				     ntohl(((struct sockaddr_in *)mask)
455					   ->sin_addr.s_addr));
456		else
457			cp = netname(sin->sin_addr.s_addr, 0L);
458		break;
459	    }
460
461#ifdef INET6
462	case AF_INET6:
463	    {
464		struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
465		struct in6_addr *in6 = &sa6->sin6_addr;
466
467		/*
468		 * XXX: This is a special workaround for KAME kernels.
469		 * sin6_scope_id field of SA should be set in the future.
470		 */
471		if (IN6_IS_ADDR_LINKLOCAL(in6) ||
472		    IN6_IS_ADDR_MC_LINKLOCAL(in6)) {
473		    /* XXX: override is ok? */
474		    sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)&in6->s6_addr[2]);
475		    *(u_short *)&in6->s6_addr[2] = 0;
476		}
477
478		if (flags & RTF_HOST)
479		    cp = routename6(sa6);
480		else if (mask)
481		    cp = netname6(sa6,
482				  &((struct sockaddr_in6 *)mask)->sin6_addr);
483		else {
484		    cp = netname6(sa6, NULL);
485		}
486		break;
487	    }
488#endif /*INET6*/
489
490	case AF_IPX:
491	    {
492		struct ipx_addr work = ((struct sockaddr_ipx *)sa)->sipx_addr;
493		if (ipx_nullnet(satoipx_addr(work)))
494			cp = "default";
495		else
496			cp = ipx_print(sa);
497		break;
498	    }
499	case AF_APPLETALK:
500	    {
501		if (!(flags & RTF_HOST) && mask)
502			cp = atalk_print2(sa,mask,9);
503		else
504			cp = atalk_print(sa,11);
505		break;
506	    }
507	case AF_NETGRAPH:
508	    {
509		printf("%s", ((struct sockaddr_ng *)sa)->sg_data);
510		break;
511	    }
512#ifdef NS
513	case AF_NS:
514		cp = ns_print(sa);
515		break;
516#endif
517
518	case AF_LINK:
519	    {
520		register struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
521
522		if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
523		    sdl->sdl_slen == 0)
524			(void) sprintf(workbuf, "link#%d", sdl->sdl_index);
525		else
526			switch (sdl->sdl_type) {
527
528			case IFT_ETHER:
529			    {
530				register int i;
531				register u_char *lla = (u_char *)sdl->sdl_data +
532				    sdl->sdl_nlen;
533
534				cplim = "";
535				for (i = 0; i < sdl->sdl_alen; i++, lla++) {
536					cp += sprintf(cp, "%s%x", cplim, *lla);
537					cplim = ":";
538				}
539				cp = workbuf;
540				break;
541			    }
542
543			default:
544				cp = link_ntoa(sdl);
545				break;
546			}
547		break;
548	    }
549
550	default:
551	    {
552		register u_char *s = (u_char *)sa->sa_data, *slim;
553
554		slim =  sa->sa_len + (u_char *) sa;
555		cplim = cp + sizeof(workbuf) - 6;
556		cp += sprintf(cp, "(%d)", sa->sa_family);
557		while (s < slim && cp < cplim) {
558			cp += sprintf(cp, " %02x", *s++);
559			if (s < slim)
560			    cp += sprintf(cp, "%02x", *s++);
561		}
562		cp = workbuf;
563	    }
564	}
565	if (width < 0 )
566		printf("%s ", cp);
567	else {
568		if (numeric_addr)
569			printf("%-*s ", width, cp);
570		else
571			printf("%-*.*s ", width, width, cp);
572	}
573}
574
575static void
576p_flags(f, format)
577	register int f;
578	char *format;
579{
580	char name[33], *flags;
581	register struct bits *p = bits;
582
583	for (flags = name; p->b_mask; p++)
584		if (p->b_mask & f)
585			*flags++ = p->b_val;
586	*flags = '\0';
587	printf(format, name);
588}
589
590static void
591p_rtentry(rt)
592	register struct rtentry *rt;
593{
594	static struct ifnet ifnet, *lastif;
595	struct rtentry parent;
596	static char name[16];
597	static char prettyname[9];
598	struct sockaddr *sa;
599	sa_u addr, mask;
600
601	/*
602	 * Don't print protocol-cloned routes unless -a.
603	 */
604	if (rt->rt_flags & RTF_WASCLONED && !aflag) {
605		kget(rt->rt_parent, parent);
606		if (parent.rt_flags & RTF_PRCLONING)
607			return;
608	}
609
610	bzero(&addr, sizeof(addr));
611	if ((sa = kgetsa(rt_key(rt))))
612		bcopy(sa, &addr, sa->sa_len);
613	bzero(&mask, sizeof(mask));
614	if (rt_mask(rt) && (sa = kgetsa(rt_mask(rt))))
615		bcopy(sa, &mask, sa->sa_len);
616	p_sockaddr(&addr.u_sa, &mask.u_sa, rt->rt_flags,
617	    WID_DST(addr.u_sa.sa_family));
618	p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST,
619	    WID_GW(addr.u_sa.sa_family));
620	p_flags(rt->rt_flags, "%-6.6s ");
621	if (addr.u_sa.sa_family == AF_INET || lflag) {
622		printf("%6ld %8ld ", rt->rt_refcnt, rt->rt_use);
623		if (lflag) {
624			if (rt->rt_rmx.rmx_mtu != 0)
625				printf("%6lu ", rt->rt_rmx.rmx_mtu);
626			else
627				printf("%6s ", "");
628		}
629	}
630	if (rt->rt_ifp) {
631		if (rt->rt_ifp != lastif) {
632			kget(rt->rt_ifp, ifnet);
633			kread((u_long)ifnet.if_name, name, 16);
634			lastif = rt->rt_ifp;
635			snprintf(prettyname, sizeof prettyname,
636				 "%s%d", name, ifnet.if_unit);
637		}
638		printf("%*.*s", WID_IF(addr.u_sa.sa_family),
639		    WID_IF(addr.u_sa.sa_family), prettyname);
640		if (rt->rt_rmx.rmx_expire) {
641			time_t expire_time;
642
643			if ((expire_time =
644			    rt->rt_rmx.rmx_expire - time((time_t *)0)) > 0)
645				printf(" %6d%s", (int)expire_time,
646				    rt->rt_nodes[0].rn_dupedkey ? " =>" : "");
647			else
648			    goto ifandkey;
649		} else if (rt->rt_nodes[0].rn_dupedkey) {
650ifandkey:;
651			printf(" =>");
652		}
653
654	}
655	putchar('\n');
656}
657
658char *
659routename(in)
660	u_long in;
661{
662	register char *cp;
663	static char line[MAXHOSTNAMELEN];
664	struct hostent *hp;
665
666	cp = 0;
667	if (!numeric_addr) {
668		hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
669			AF_INET);
670		if (hp) {
671			cp = hp->h_name;
672			trimdomain(cp, strlen(cp));
673		}
674	}
675	if (cp) {
676		strncpy(line, cp, sizeof(line) - 1);
677		line[sizeof(line) - 1] = '\0';
678	} else {
679#define C(x)	((x) & 0xff)
680		in = ntohl(in);
681		sprintf(line, "%lu.%lu.%lu.%lu",
682		    C(in >> 24), C(in >> 16), C(in >> 8), C(in));
683	}
684	return (line);
685}
686
687static u_long
688forgemask(a)
689	u_long a;
690{
691	u_long m;
692
693	if (IN_CLASSA(a))
694		m = IN_CLASSA_NET;
695	else if (IN_CLASSB(a))
696		m = IN_CLASSB_NET;
697	else
698		m = IN_CLASSC_NET;
699	return (m);
700}
701
702static void
703domask(dst, addr, mask)
704	char *dst;
705	u_long addr, mask;
706{
707	register int b, i;
708
709	if (!mask || (forgemask(addr) == mask)) {
710		*dst = '\0';
711		return;
712	}
713	i = 0;
714	for (b = 0; b < 32; b++)
715		if (mask & (1 << b)) {
716			register int bb;
717
718			i = b;
719			for (bb = b+1; bb < 32; bb++)
720				if (!(mask & (1 << bb))) {
721					i = -1;	/* noncontig */
722					break;
723				}
724			break;
725		}
726	if (i == -1)
727		sprintf(dst, "&0x%lx", mask);
728	else
729		sprintf(dst, "/%d", 32-i);
730}
731
732/*
733 * Return the name of the network whose address is given.
734 * The address is assumed to be that of a net or subnet, not a host.
735 */
736char *
737netname(in, mask)
738	u_long in, mask;
739{
740	char *cp = 0;
741	static char line[MAXHOSTNAMELEN];
742	struct netent *np = 0;
743	u_long net, omask, dmask;
744	register u_long i;
745
746	i = ntohl(in);
747	dmask = forgemask(i);
748	omask = mask;
749	if (!numeric_addr && i) {
750		net = i & dmask;
751		if (!(np = getnetbyaddr(i, AF_INET)) && net != i)
752			np = getnetbyaddr(net, AF_INET);
753		if (np) {
754			cp = np->n_name;
755			trimdomain(cp, strlen(cp));
756		}
757	}
758	if (cp)
759		strncpy(line, cp, sizeof(line) - 1);
760	else {
761		switch (dmask) {
762		case IN_CLASSA_NET:
763			if ((i & IN_CLASSA_HOST) == 0) {
764				sprintf(line, "%lu", C(i >> 24));
765				break;
766			}
767			/* FALLTHROUGH */
768		case IN_CLASSB_NET:
769			if ((i & IN_CLASSB_HOST) == 0) {
770				sprintf(line, "%lu.%lu",
771					C(i >> 24), C(i >> 16));
772				break;
773			}
774			/* FALLTHROUGH */
775		case IN_CLASSC_NET:
776			if ((i & IN_CLASSC_HOST) == 0) {
777				sprintf(line, "%lu.%lu.%lu",
778					C(i >> 24), C(i >> 16), C(i >> 8));
779				break;
780			}
781			/* FALLTHROUGH */
782		default:
783			sprintf(line, "%lu.%lu.%lu.%lu",
784				C(i >> 24), C(i >> 16), C(i >> 8), C(i));
785			break;
786		}
787	}
788	domask(line+strlen(line), i, omask);
789	return (line);
790}
791
792#ifdef INET6
793char *
794netname6(sa6, mask)
795	struct sockaddr_in6 *sa6;
796	struct in6_addr *mask;
797{
798	static char line[MAXHOSTNAMELEN];
799	u_char *p = (u_char *)mask;
800	u_char *lim;
801	int masklen, illegal = 0, flag = NI_WITHSCOPEID;
802
803	if (mask) {
804		for (masklen = 0, lim = p + 16; p < lim; p++) {
805			switch (*p) {
806			 case 0xff:
807				 masklen += 8;
808				 break;
809			 case 0xfe:
810				 masklen += 7;
811				 break;
812			 case 0xfc:
813				 masklen += 6;
814				 break;
815			 case 0xf8:
816				 masklen += 5;
817				 break;
818			 case 0xf0:
819				 masklen += 4;
820				 break;
821			 case 0xe0:
822				 masklen += 3;
823				 break;
824			 case 0xc0:
825				 masklen += 2;
826				 break;
827			 case 0x80:
828				 masklen += 1;
829				 break;
830			 case 0x00:
831				 break;
832			 default:
833				 illegal ++;
834				 break;
835			}
836		}
837		if (illegal)
838			fprintf(stderr, "illegal prefixlen\n");
839	}
840	else
841		masklen = 128;
842
843	if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr))
844		return("default");
845
846	if (numeric_addr)
847		flag |= NI_NUMERICHOST;
848	getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, line, sizeof(line),
849		    NULL, 0, flag);
850
851	if (numeric_addr)
852		sprintf(&line[strlen(line)], "/%d", masklen);
853
854	return line;
855}
856
857char *
858routename6(sa6)
859	struct sockaddr_in6 *sa6;
860{
861	static char line[MAXHOSTNAMELEN];
862	int flag = NI_WITHSCOPEID;
863	/* use local variable for safety */
864	struct sockaddr_in6 sa6_local = {AF_INET6, sizeof(sa6_local),};
865
866	sa6_local.sin6_addr = sa6->sin6_addr;
867	sa6_local.sin6_scope_id = sa6->sin6_scope_id;
868
869	if (numeric_addr)
870		flag |= NI_NUMERICHOST;
871
872	getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len,
873		    line, sizeof(line), NULL, 0, flag);
874
875	return line;
876}
877#endif /*INET6*/
878
879/*
880 * Print routing statistics
881 */
882void
883rt_stats(off)
884	u_long off;
885{
886	struct rtstat rtstat;
887
888	if (off == 0) {
889		printf("rtstat: symbol not in namelist\n");
890		return;
891	}
892	kread(off, (char *)&rtstat, sizeof (rtstat));
893	printf("routing:\n");
894	printf("\t%u bad routing redirect%s\n",
895		rtstat.rts_badredirect, plural(rtstat.rts_badredirect));
896	printf("\t%u dynamically created route%s\n",
897		rtstat.rts_dynamic, plural(rtstat.rts_dynamic));
898	printf("\t%u new gateway%s due to redirects\n",
899		rtstat.rts_newgateway, plural(rtstat.rts_newgateway));
900	printf("\t%u destination%s found unreachable\n",
901		rtstat.rts_unreach, plural(rtstat.rts_unreach));
902	printf("\t%u use%s of a wildcard route\n",
903		rtstat.rts_wildcard, plural(rtstat.rts_wildcard));
904}
905
906char *
907ipx_print(sa)
908	register struct sockaddr *sa;
909{
910	u_short port;
911	struct servent *sp = 0;
912	char *net = "", *host = "";
913	register char *p;
914	register u_char *q;
915	struct ipx_addr work = ((struct sockaddr_ipx *)sa)->sipx_addr;
916	static char mybuf[50];
917	char cport[10], chost[15], cnet[15];
918
919	port = ntohs(work.x_port);
920
921	if (ipx_nullnet(work) && ipx_nullhost(work)) {
922
923		if (port) {
924			if (sp)
925				sprintf(mybuf, "*.%s", sp->s_name);
926			else
927				sprintf(mybuf, "*.%x", port);
928		} else
929			sprintf(mybuf, "*.*");
930
931		return (mybuf);
932	}
933
934	if (ipx_wildnet(work))
935		net = "any";
936	else if (ipx_nullnet(work))
937		net = "*";
938	else {
939		q = work.x_net.c_net;
940		sprintf(cnet, "%02x%02x%02x%02x",
941			q[0], q[1], q[2], q[3]);
942		for (p = cnet; *p == '0' && p < cnet + 8; p++)
943			continue;
944		net = p;
945	}
946
947	if (ipx_wildhost(work))
948		host = "any";
949	else if (ipx_nullhost(work))
950		host = "*";
951	else {
952		q = work.x_host.c_host;
953		sprintf(chost, "%02x%02x%02x%02x%02x%02x",
954			q[0], q[1], q[2], q[3], q[4], q[5]);
955		for (p = chost; *p == '0' && p < chost + 12; p++)
956			continue;
957		host = p;
958	}
959
960	if (port) {
961		if (strcmp(host, "*") == 0)
962			host = "";
963		if (sp)
964			snprintf(cport, sizeof(cport),
965				"%s%s", *host ? "." : "", sp->s_name);
966		else
967			snprintf(cport, sizeof(cport),
968				"%s%x", *host ? "." : "", port);
969	} else
970		*cport = 0;
971
972	snprintf(mybuf, sizeof(mybuf), "%s.%s%s", net, host, cport);
973	return(mybuf);
974}
975
976char *
977ipx_phost(sa)
978	struct sockaddr *sa;
979{
980	register struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)sa;
981	struct sockaddr_ipx work;
982	static union ipx_net ipx_zeronet;
983	char *p;
984	struct ipx_addr in;
985
986	work = *sipx;
987	in = work.sipx_addr;
988
989	work.sipx_addr.x_port = 0;
990	work.sipx_addr.x_net = ipx_zeronet;
991	p = ipx_print((struct sockaddr *)&work);
992	if (strncmp("*.", p, 2) == 0) p += 2;
993
994	return(p);
995}
996
997#ifdef NS
998short ns_nullh[] = {0,0,0};
999short ns_bh[] = {-1,-1,-1};
1000
1001char *
1002ns_print(sa)
1003	register struct sockaddr *sa;
1004{
1005	register struct sockaddr_ns *sns = (struct sockaddr_ns*)sa;
1006	struct ns_addr work;
1007	union { union ns_net net_e; u_long long_e; } net;
1008	u_short port;
1009	static char mybuf[50], cport[10], chost[25];
1010	char *host = "";
1011	register char *p; register u_char *q;
1012
1013	work = sns->sns_addr;
1014	port = ntohs(work.x_port);
1015	work.x_port = 0;
1016	net.net_e  = work.x_net;
1017	if (ns_nullhost(work) && net.long_e == 0) {
1018		if (port ) {
1019			sprintf(mybuf, "*.%xH", port);
1020			upHex(mybuf);
1021		} else
1022			sprintf(mybuf, "*.*");
1023		return (mybuf);
1024	}
1025
1026	if (bcmp(ns_bh, work.x_host.c_host, 6) == 0) {
1027		host = "any";
1028	} else if (bcmp(ns_nullh, work.x_host.c_host, 6) == 0) {
1029		host = "*";
1030	} else {
1031		q = work.x_host.c_host;
1032		sprintf(chost, "%02x%02x%02x%02x%02x%02xH",
1033			q[0], q[1], q[2], q[3], q[4], q[5]);
1034		for (p = chost; *p == '0' && p < chost + 12; p++)
1035			continue;
1036		host = p;
1037	}
1038	if (port)
1039		sprintf(cport, ".%xH", htons(port));
1040	else
1041		*cport = 0;
1042
1043	sprintf(mybuf,"%xH.%s%s", ntohl(net.long_e), host, cport);
1044	upHex(mybuf);
1045	return(mybuf);
1046}
1047
1048char *
1049ns_phost(sa)
1050	struct sockaddr *sa;
1051{
1052	register struct sockaddr_ns *sns = (struct sockaddr_ns *)sa;
1053	struct sockaddr_ns work;
1054	static union ns_net ns_zeronet;
1055	char *p;
1056
1057	work = *sns;
1058	work.sns_addr.x_port = 0;
1059	work.sns_addr.x_net = ns_zeronet;
1060
1061	p = ns_print((struct sockaddr *)&work);
1062	if (strncmp("0H.", p, 3) == 0)
1063		p += 3;
1064	return(p);
1065}
1066#endif
1067
1068void
1069upHex(p0)
1070	char *p0;
1071{
1072	register char *p = p0;
1073
1074	for (; *p; p++)
1075		switch (*p) {
1076
1077		case 'a':
1078		case 'b':
1079		case 'c':
1080		case 'd':
1081		case 'e':
1082		case 'f':
1083			*p += ('A' - 'a');
1084			break;
1085		}
1086}
1087