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1.2 ! deraadt 1: /* $NetBSD: route.c,v 1.15 1996/05/07 02:55:06 thorpej Exp $ */
1.1 deraadt 2:
3: /*
4: * Copyright (c) 1983, 1988, 1993
5: * The Regents of the University of California. All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #ifndef lint
37: #if 0
38: static char sccsid[] = "from: @(#)route.c 8.3 (Berkeley) 3/9/94";
39: #else
1.2 ! deraadt 40: static char *rcsid = "$NetBSD: route.c,v 1.15 1996/05/07 02:55:06 thorpej Exp $";
1.1 deraadt 41: #endif
42: #endif /* not lint */
43:
44: #include <sys/param.h>
45: #include <sys/protosw.h>
46: #include <sys/socket.h>
47: #include <sys/mbuf.h>
48:
49: #include <net/if.h>
50: #include <net/if_dl.h>
51: #include <net/if_types.h>
52: #define _KERNEL
53: #include <net/route.h>
54: #undef _KERNEL
55: #include <netinet/in.h>
56:
57: #include <netns/ns.h>
58:
59: #include <sys/sysctl.h>
60:
61: #include <netdb.h>
62: #include <stdio.h>
63: #include <stdlib.h>
64: #include <string.h>
65: #include <unistd.h>
66: #include "netstat.h"
67:
68: #define kget(p, d) (kread((u_long)(p), (char *)&(d), sizeof (d)))
69:
70: /*
71: * Definitions for showing gateway flags.
72: */
73: struct bits {
74: short b_mask;
75: char b_val;
76: } bits[] = {
77: { RTF_UP, 'U' },
78: { RTF_GATEWAY, 'G' },
79: { RTF_HOST, 'H' },
80: { RTF_REJECT, 'R' },
81: { RTF_DYNAMIC, 'D' },
82: { RTF_MODIFIED, 'M' },
83: { RTF_DONE, 'd' }, /* Completed -- for routing messages only */
84: { RTF_MASK, 'm' }, /* Mask Present -- for routing messages only */
85: { RTF_CLONING, 'C' },
86: { RTF_XRESOLVE, 'X' },
87: { RTF_LLINFO, 'L' },
88: { RTF_STATIC, 'S' },
89: { RTF_PROTO1, '1' },
90: { RTF_PROTO2, '2' },
91: { 0 }
92: };
93:
94: static union {
95: struct sockaddr u_sa;
96: u_short u_data[128];
97: } pt_u;
98:
99: int do_rtent = 0;
100: struct rtentry rtentry;
101: struct radix_node rnode;
102: struct radix_mask rmask;
103:
104: int NewTree = 0;
105:
106: static struct sockaddr *kgetsa __P((struct sockaddr *));
107: static void p_tree __P((struct radix_node *));
108: static void p_rtnode __P(());
109: static void ntreestuff __P(());
110: static void np_rtentry __P((struct rt_msghdr *));
111: static void p_sockaddr __P((struct sockaddr *, int, int));
112: static void p_flags __P((int, char *));
113: static void p_rtentry __P((struct rtentry *));
114:
115: /*
116: * Print routing tables.
117: */
118: void
119: routepr(rtree)
120: u_long rtree;
121: {
122: struct radix_node_head *rnh, head;
123: int i;
124:
125: printf("Routing tables\n");
126:
127: if (Aflag == 0 && NewTree)
128: ntreestuff();
129: else {
130: if (rtree == 0) {
131: printf("rt_tables: symbol not in namelist\n");
132: return;
133: }
134:
135: kget(rtree, rt_tables);
136: for (i = 0; i <= AF_MAX; i++) {
137: if ((rnh = rt_tables[i]) == 0)
138: continue;
139: kget(rnh, head);
140: if (i == AF_UNSPEC) {
141: if (Aflag && af == 0) {
142: printf("Netmasks:\n");
143: p_tree(head.rnh_treetop);
144: }
145: } else if (af == AF_UNSPEC || af == i) {
146: pr_family(i);
147: do_rtent = 1;
148: pr_rthdr();
149: p_tree(head.rnh_treetop);
150: }
151: }
152: }
153: }
154:
155: /*
156: * Print address family header before a section of the routing table.
157: */
158: void
159: pr_family(af)
160: int af;
161: {
162: char *afname;
163:
164: switch (af) {
165: case AF_INET:
166: afname = "Internet";
167: break;
168: case AF_NS:
169: afname = "XNS";
170: break;
171: case AF_ISO:
172: afname = "ISO";
173: break;
174: case AF_CCITT:
175: afname = "X.25";
176: break;
177: default:
178: afname = NULL;
179: break;
180: }
181: if (afname)
182: printf("\n%s:\n", afname);
183: else
184: printf("\nProtocol Family %d:\n", af);
185: }
186:
187: /* column widths; each followed by one space */
188: #define WID_DST 16 /* width of destination column */
189: #define WID_GW 18 /* width of gateway column */
190:
191: /*
192: * Print header for routing table columns.
193: */
194: void
195: pr_rthdr()
196: {
197:
198: if (Aflag)
199: printf("%-8.8s ","Address");
200: printf("%-*.*s %-*.*s %-6.6s %6.6s%8.8s %6.6s %s\n",
201: WID_DST, WID_DST, "Destination",
202: WID_GW, WID_GW, "Gateway",
203: "Flags", "Refs", "Use", "Mtu", "Interface");
204: }
205:
206: static struct sockaddr *
207: kgetsa(dst)
208: register struct sockaddr *dst;
209: {
210:
211: kget(dst, pt_u.u_sa);
212: if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa))
213: kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len);
214: return (&pt_u.u_sa);
215: }
216:
217: static void
218: p_tree(rn)
219: struct radix_node *rn;
220: {
221:
222: again:
223: kget(rn, rnode);
224: if (rnode.rn_b < 0) {
225: if (Aflag)
226: printf("%-8.8x ", rn);
227: if (rnode.rn_flags & RNF_ROOT) {
228: if (Aflag)
229: printf("(root node)%s",
230: rnode.rn_dupedkey ? " =>\n" : "\n");
231: } else if (do_rtent) {
232: kget(rn, rtentry);
233: p_rtentry(&rtentry);
234: if (Aflag)
235: p_rtnode();
236: } else {
237: p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key),
238: 0, 44);
239: putchar('\n');
240: }
241: if (rn = rnode.rn_dupedkey)
242: goto again;
243: } else {
244: if (Aflag && do_rtent) {
245: printf("%-8.8x ", rn);
246: p_rtnode();
247: }
248: rn = rnode.rn_r;
249: p_tree(rnode.rn_l);
250: p_tree(rn);
251: }
252: }
253:
254: char nbuf[20];
255:
256: static void
257: p_rtnode()
258: {
259: struct radix_mask *rm = rnode.rn_mklist;
260:
261: if (rnode.rn_b < 0) {
262: if (rnode.rn_mask) {
263: printf("\t mask ");
264: p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask),
265: 0, -1);
266: } else if (rm == 0)
267: return;
268: } else {
269: sprintf(nbuf, "(%d)", rnode.rn_b);
270: printf("%6.6s %8.8x : %8.8x", nbuf, rnode.rn_l, rnode.rn_r);
271: }
272: while (rm) {
273: kget(rm, rmask);
274: sprintf(nbuf, " %d refs, ", rmask.rm_refs);
275: printf(" mk = %8.8x {(%d),%s",
276: rm, -1 - rmask.rm_b, rmask.rm_refs ? nbuf : " ");
277: p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask), 0, -1);
278: putchar('}');
279: if (rm = rmask.rm_mklist)
280: printf(" ->");
281: }
282: putchar('\n');
283: }
284:
285: static void
286: ntreestuff()
287: {
288: size_t needed;
289: int mib[6];
290: char *buf, *next, *lim;
291: register struct rt_msghdr *rtm;
292:
293: mib[0] = CTL_NET;
294: mib[1] = PF_ROUTE;
295: mib[2] = 0;
296: mib[3] = 0;
297: mib[4] = NET_RT_DUMP;
298: mib[5] = 0;
299: if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
300: { perror("route-sysctl-estimate"); exit(1);}
301: if ((buf = malloc(needed)) == 0)
302: { printf("out of space\n"); exit(1);}
303: if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
304: { perror("sysctl of routing table"); exit(1);}
305: lim = buf + needed;
306: for (next = buf; next < lim; next += rtm->rtm_msglen) {
307: rtm = (struct rt_msghdr *)next;
308: np_rtentry(rtm);
309: }
310: }
311:
312: static void
313: np_rtentry(rtm)
314: register struct rt_msghdr *rtm;
315: {
316: register struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
317: #ifdef notdef
318: static int masks_done, banner_printed;
319: #endif
320: static int old_af;
321: int af = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST;
322:
323: #ifdef notdef
324: /* for the moment, netmasks are skipped over */
325: if (!banner_printed) {
326: printf("Netmasks:\n");
327: banner_printed = 1;
328: }
329: if (masks_done == 0) {
330: if (rtm->rtm_addrs != RTA_DST ) {
331: masks_done = 1;
332: af = sa->sa_family;
333: }
334: } else
335: #endif
336: af = sa->sa_family;
337: if (af != old_af) {
338: pr_family(af);
339: old_af = af;
340: }
341: if (rtm->rtm_addrs == RTA_DST)
342: p_sockaddr(sa, 0, 36);
343: else {
344: p_sockaddr(sa, rtm->rtm_flags, 16);
345: if (sa->sa_len == 0)
346: sa->sa_len = sizeof(long);
347: sa = (struct sockaddr *)(sa->sa_len + (char *)sa);
348: p_sockaddr(sa, 0, 18);
349: }
350: p_flags(rtm->rtm_flags & interesting, "%-6.6s ");
351: putchar('\n');
352: }
353:
354: static void
355: p_sockaddr(sa, flags, width)
356: struct sockaddr *sa;
357: int flags, width;
358: {
359: char workbuf[128], *cplim;
360: register char *cp = workbuf;
361:
362: switch(sa->sa_family) {
363: case AF_INET:
364: {
365: register struct sockaddr_in *sin = (struct sockaddr_in *)sa;
366:
367: cp = (sin->sin_addr.s_addr == 0) ? "default" :
368: ((flags & RTF_HOST) ?
369: routename(sin->sin_addr.s_addr) :
370: netname(sin->sin_addr.s_addr, INADDR_ANY));
371: break;
372: }
373:
374: case AF_NS:
375: cp = ns_print(sa);
376: break;
377:
378: case AF_LINK:
379: {
380: register struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
381:
382: if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
383: sdl->sdl_slen == 0)
384: (void) sprintf(workbuf, "link#%d", sdl->sdl_index);
385: else switch (sdl->sdl_type) {
386: case IFT_ETHER:
387: {
388: register int i;
389: register u_char *lla = (u_char *)sdl->sdl_data +
390: sdl->sdl_nlen;
391:
392: cplim = "";
393: for (i = 0; i < sdl->sdl_alen; i++, lla++) {
394: cp += sprintf(cp, "%s%x", cplim, *lla);
395: cplim = ":";
396: }
397: cp = workbuf;
398: break;
399: }
400: default:
401: cp = link_ntoa(sdl);
402: break;
403: }
404: break;
405: }
406:
407: default:
408: {
409: register u_char *s = (u_char *)sa->sa_data, *slim;
410:
411: slim = sa->sa_len + (u_char *) sa;
412: cplim = cp + sizeof(workbuf) - 6;
413: cp += sprintf(cp, "(%d)", sa->sa_family);
414: while (s < slim && cp < cplim) {
415: cp += sprintf(cp, " %02x", *s++);
416: if (s < slim)
417: cp += sprintf(cp, "%02x", *s++);
418: }
419: cp = workbuf;
420: }
421: }
422: if (width < 0 )
423: printf("%s ", cp);
424: else {
425: if (nflag)
426: printf("%-*s ", width, cp);
427: else
428: printf("%-*.*s ", width, width, cp);
429: }
430: }
431:
432: static void
433: p_flags(f, format)
434: register int f;
435: char *format;
436: {
437: char name[33], *flags;
438: register struct bits *p = bits;
439:
440: for (flags = name; p->b_mask; p++)
441: if (p->b_mask & f)
442: *flags++ = p->b_val;
443: *flags = '\0';
444: printf(format, name);
445: }
446:
447: static void
448: p_rtentry(rt)
449: register struct rtentry *rt;
450: {
451: static struct ifnet ifnet, *lastif;
452:
453: p_sockaddr(kgetsa(rt_key(rt)), rt->rt_flags, WID_DST);
454: p_sockaddr(kgetsa(rt->rt_gateway), RTF_HOST, WID_GW);
455: p_flags(rt->rt_flags, "%-6.6s ");
456: printf("%6d %8d ", rt->rt_refcnt, rt->rt_use);
457: if (rt->rt_rmx.rmx_mtu)
458: printf("%6d ", rt->rt_rmx.rmx_mtu);
459: else
460: printf("%6s ", "-");
461: if (rt->rt_ifp) {
462: if (rt->rt_ifp != lastif) {
463: kget(rt->rt_ifp, ifnet);
464: lastif = rt->rt_ifp;
465: }
1.2 ! deraadt 466: printf(" %.16s%s", ifnet.if_xname,
1.1 deraadt 467: rt->rt_nodes[0].rn_dupedkey ? " =>" : "");
468: }
469: putchar('\n');
470: }
471:
472: char *
473: routename(in)
474: u_int32_t in;
475: {
476: register char *cp;
477: static char line[MAXHOSTNAMELEN + 1];
478: struct hostent *hp;
479: static char domain[MAXHOSTNAMELEN + 1];
480: static int first = 1;
481:
482: if (first) {
483: first = 0;
484: if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
485: (cp = index(domain, '.')))
486: (void) strcpy(domain, cp + 1);
487: else
488: domain[0] = 0;
489: }
490: cp = 0;
491: if (!nflag) {
492: hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
493: AF_INET);
494: if (hp) {
495: if ((cp = index(hp->h_name, '.')) &&
496: !strcmp(cp + 1, domain))
497: *cp = 0;
498: cp = hp->h_name;
499: }
500: }
501: if (cp)
502: strncpy(line, cp, sizeof(line) - 1);
503: else {
504: #define C(x) ((x) & 0xff)
505: in = ntohl(in);
506: sprintf(line, "%u.%u.%u.%u",
507: C(in >> 24), C(in >> 16), C(in >> 8), C(in));
508: }
509: return (line);
510: }
511:
512: /*
513: * Return the name of the network whose address is given.
514: * The address is assumed to be that of a net or subnet, not a host.
515: */
516: char *
517: netname(in, mask)
518: u_int32_t in, mask;
519: {
520: char *cp = 0;
521: static char line[MAXHOSTNAMELEN + 1];
522: struct netent *np = 0;
523: u_int32_t net;
524: int subnetshift;
525:
526: in = ntohl(in);
527: mask = ntohl(mask);
528: if (!nflag && in != INADDR_ANY) {
529: if (mask == INADDR_ANY) {
530: if (IN_CLASSA(in)) {
531: mask = IN_CLASSA_NET;
532: subnetshift = 8;
533: } else if (IN_CLASSB(in)) {
534: mask = IN_CLASSB_NET;
535: subnetshift = 8;
536: } else {
537: mask = IN_CLASSC_NET;
538: subnetshift = 4;
539: }
540: /*
541: * If there are more bits than the standard mask
542: * would suggest, subnets must be in use.
543: * Guess at the subnet mask, assuming reasonable
544: * width subnet fields.
545: */
546: while (in &~ mask)
547: mask = (long)mask >> subnetshift;
548: }
549: net = in & mask;
550: while ((mask & 1) == 0)
551: mask >>= 1, net >>= 1;
552: np = getnetbyaddr(net, AF_INET);
553: if (np)
554: cp = np->n_name;
555: }
556: if (cp)
557: strncpy(line, cp, sizeof(line) - 1);
558: else if ((in & 0xffffff) == 0)
559: sprintf(line, "%u", C(in >> 24));
560: else if ((in & 0xffff) == 0)
561: sprintf(line, "%u.%u", C(in >> 24) , C(in >> 16));
562: else if ((in & 0xff) == 0)
563: sprintf(line, "%u.%u.%u", C(in >> 24), C(in >> 16), C(in >> 8));
564: else
565: sprintf(line, "%u.%u.%u.%u", C(in >> 24),
566: C(in >> 16), C(in >> 8), C(in));
567: return (line);
568: }
569:
570: /*
571: * Print routing statistics
572: */
573: void
574: rt_stats(off)
575: u_long off;
576: {
577: struct rtstat rtstat;
578:
579: if (off == 0) {
580: printf("rtstat: symbol not in namelist\n");
581: return;
582: }
583: kread(off, (char *)&rtstat, sizeof (rtstat));
584: printf("routing:\n");
585: printf("\t%u bad routing redirect%s\n",
586: rtstat.rts_badredirect, plural(rtstat.rts_badredirect));
587: printf("\t%u dynamically created route%s\n",
588: rtstat.rts_dynamic, plural(rtstat.rts_dynamic));
589: printf("\t%u new gateway%s due to redirects\n",
590: rtstat.rts_newgateway, plural(rtstat.rts_newgateway));
591: printf("\t%u destination%s found unreachable\n",
592: rtstat.rts_unreach, plural(rtstat.rts_unreach));
593: printf("\t%u use%s of a wildcard route\n",
594: rtstat.rts_wildcard, plural(rtstat.rts_wildcard));
595: }
596: short ns_nullh[] = {0,0,0};
597: short ns_bh[] = {-1,-1,-1};
598:
599: char *
600: ns_print(sa)
601: register struct sockaddr *sa;
602: {
603: register struct sockaddr_ns *sns = (struct sockaddr_ns*)sa;
604: struct ns_addr work;
605: union { union ns_net net_e; u_long long_e; } net;
606: u_short port;
607: static char mybuf[50], cport[10], chost[25];
608: char *host = "";
609: register char *p; register u_char *q;
610:
611: work = sns->sns_addr;
612: port = ntohs(work.x_port);
613: work.x_port = 0;
614: net.net_e = work.x_net;
615: if (ns_nullhost(work) && net.long_e == 0) {
616: if (port ) {
617: sprintf(mybuf, "*.%xH", port);
618: upHex(mybuf);
619: } else
620: sprintf(mybuf, "*.*");
621: return (mybuf);
622: }
623:
624: if (bcmp(ns_bh, work.x_host.c_host, 6) == 0) {
625: host = "any";
626: } else if (bcmp(ns_nullh, work.x_host.c_host, 6) == 0) {
627: host = "*";
628: } else {
629: q = work.x_host.c_host;
630: sprintf(chost, "%02x%02x%02x%02x%02x%02xH",
631: q[0], q[1], q[2], q[3], q[4], q[5]);
632: for (p = chost; *p == '0' && p < chost + 12; p++)
633: continue;
634: host = p;
635: }
636: if (port)
637: sprintf(cport, ".%xH", htons(port));
638: else
639: *cport = 0;
640:
641: sprintf(mybuf,"%xH.%s%s", ntohl(net.long_e), host, cport);
642: upHex(mybuf);
643: return(mybuf);
644: }
645:
646: char *
647: ns_phost(sa)
648: struct sockaddr *sa;
649: {
650: register struct sockaddr_ns *sns = (struct sockaddr_ns *)sa;
651: struct sockaddr_ns work;
652: static union ns_net ns_zeronet;
653: char *p;
654:
655: work = *sns;
656: work.sns_addr.x_port = 0;
657: work.sns_addr.x_net = ns_zeronet;
658:
659: p = ns_print((struct sockaddr *)&work);
660: if (strncmp("0H.", p, 3) == 0) p += 3;
661: return(p);
662: }
663:
664: void
665: upHex(p0)
666: char *p0;
667: {
668: register char *p = p0;
669: for (; *p; p++) switch (*p) {
670:
671: case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
672: *p += ('A' - 'a');
673: }
674: }