Annotation of src/usr.bin/netstat/show.c, Revision 1.46
1.46 ! claudio 1: /* $OpenBSD: show.c,v 1.45 2015/02/06 03:22:00 reyk Exp $ */
1.1 claudio 2: /* $NetBSD: show.c,v 1.1 1996/11/15 18:01:41 gwr Exp $ */
3:
4: /*
5: * Copyright (c) 1983, 1988, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the University nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #include <sys/socket.h>
34: #include <sys/sysctl.h>
35:
36: #include <net/if.h>
37: #include <net/if_dl.h>
38: #include <net/if_types.h>
39: #include <net/route.h>
40: #include <netinet/in.h>
41: #include <netinet/if_ether.h>
1.13 claudio 42: #include <netmpls/mpls.h>
1.1 claudio 43: #include <arpa/inet.h>
44:
45: #include <err.h>
46: #include <errno.h>
47: #include <netdb.h>
48: #include <stdio.h>
49: #include <stddef.h>
50: #include <stdlib.h>
51: #include <string.h>
52: #include <unistd.h>
1.44 deraadt 53: #include <limits.h>
1.1 claudio 54:
55: #include "netstat.h"
56:
57: char *any_ntoa(const struct sockaddr *);
58: char *link_print(struct sockaddr *);
1.30 claudio 59: char *label_print(struct sockaddr *);
1.1 claudio 60:
61: #define ROUNDUP(a) \
62: ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
63: #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
64:
65: /*
66: * Definitions for showing gateway flags.
67: */
68: struct bits {
69: int b_mask;
70: char b_val;
71: };
72: static const struct bits bits[] = {
73: { RTF_UP, 'U' },
74: { RTF_GATEWAY, 'G' },
75: { RTF_HOST, 'H' },
76: { RTF_REJECT, 'R' },
77: { RTF_BLACKHOLE, 'B' },
78: { RTF_DYNAMIC, 'D' },
79: { RTF_MODIFIED, 'M' },
80: { RTF_DONE, 'd' }, /* Completed -- for routing messages only */
81: { RTF_MASK, 'm' }, /* Mask Present -- for routing messages only */
82: { RTF_CLONING, 'C' },
83: { RTF_XRESOLVE, 'X' },
84: { RTF_LLINFO, 'L' },
85: { RTF_STATIC, 'S' },
86: { RTF_PROTO1, '1' },
87: { RTF_PROTO2, '2' },
88: { RTF_PROTO3, '3' },
89: { RTF_CLONED, 'c' },
1.18 claudio 90: { RTF_MPATH, 'P' },
1.25 michele 91: { RTF_MPLS, 'T' },
1.42 mpi 92: { RTF_LOCAL, 'l' },
93: { RTF_BROADCAST, 'b' },
1.1 claudio 94: { 0 }
95: };
96:
1.41 claudio 97: int WID_DST(int);
1.1 claudio 98: void p_rtentry(struct rt_msghdr *);
99: void pr_family(int);
100: void p_sockaddr(struct sockaddr *, struct sockaddr *, int, int);
1.17 michele 101: void p_sockaddr_mpls(struct sockaddr *, struct sockaddr *, int, int);
1.1 claudio 102: void p_flags(int, char *);
103: char *routename4(in_addr_t);
104: char *routename6(struct sockaddr_in6 *);
105:
1.46 ! claudio 106: size_t
! 107: get_sysctl(const int *mib, u_int mcnt, char **buf)
! 108: {
! 109: size_t needed;
! 110:
! 111: while (1) {
! 112: if (sysctl(mib, mcnt, NULL, &needed, NULL, 0) == -1)
! 113: err(1, "sysctl-estimate");
! 114: if (needed == 0)
! 115: break;
! 116: if ((*buf = realloc(*buf, needed)) == NULL)
! 117: err(1, NULL);
! 118: if (sysctl(mib, mcnt, *buf, &needed, NULL, 0) == -1) {
! 119: if (errno == ENOMEM)
! 120: continue;
! 121: err(1, "sysctl");
! 122: }
! 123: break;
! 124: }
! 125:
! 126: return needed;
! 127: }
! 128:
1.1 claudio 129: /*
130: * Print routing tables.
131: */
132: void
1.35 mikeb 133: p_rttables(int af, u_int tableid)
1.1 claudio 134: {
135: struct rt_msghdr *rtm;
136: char *buf = NULL, *next, *lim = NULL;
137: size_t needed;
1.34 claudio 138: int mib[7], mcnt;
1.1 claudio 139: struct sockaddr *sa;
140:
141: mib[0] = CTL_NET;
142: mib[1] = PF_ROUTE;
143: mib[2] = 0;
144: mib[3] = af;
145: mib[4] = NET_RT_DUMP;
146: mib[5] = 0;
1.35 mikeb 147: mib[6] = tableid;
148: mcnt = 7;
1.46 ! claudio 149:
! 150: needed = get_sysctl(mib, mcnt, &buf);
! 151: lim = buf + needed;
1.1 claudio 152:
153: printf("Routing tables\n");
154:
155: if (buf) {
156: for (next = buf; next < lim; next += rtm->rtm_msglen) {
157: rtm = (struct rt_msghdr *)next;
1.8 claudio 158: if (rtm->rtm_version != RTM_VERSION)
159: continue;
1.23 chris 160: sa = (struct sockaddr *)(next + rtm->rtm_hdrlen);
1.1 claudio 161: if (af != AF_UNSPEC && sa->sa_family != af)
162: continue;
163: p_rtentry(rtm);
164: }
165: free(buf);
166: buf = NULL;
167: }
168: }
169:
1.12 deraadt 170: /*
1.1 claudio 171: * column widths; each followed by one space
172: * width of destination/gateway column
173: * strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4
174: */
175: #define WID_GW(af) ((af) == AF_INET6 ? (nflag ? 30 : 18) : 18)
176:
1.41 claudio 177: int
1.13 claudio 178: WID_DST(int af)
179: {
180:
181: if (nflag)
182: switch (af) {
183: case AF_MPLS:
1.30 claudio 184: return 9;
1.13 claudio 185: case AF_INET6:
186: return 34;
187: default:
188: return 18;
189: }
190: else
191: switch (af) {
192: case AF_MPLS:
1.30 claudio 193: return 9;
1.13 claudio 194: default:
195: return 18;
196: }
197: }
198:
1.1 claudio 199: /*
200: * Print header for routing table columns.
201: */
202: void
203: pr_rthdr(int af, int Aflag)
204: {
205: if (Aflag)
206: printf("%-*.*s ", PLEN, PLEN, "Address");
1.13 claudio 207: switch (af) {
208: case PF_KEY:
1.1 claudio 209: printf("%-18s %-5s %-18s %-5s %-5s %-22s\n",
210: "Source", "Port", "Destination",
211: "Port", "Proto", "SA(Address/Proto/Type/Direction)");
1.13 claudio 212: break;
213: case PF_MPLS:
1.30 claudio 214: printf("%-9s %-9s %-6s %-18s %-6.6s %5.5s %8.8s %5.5s %4.4s %s\n",
1.13 claudio 215: "In label", "Out label", "Op", "Gateway",
216: "Flags", "Refs", "Use", "Mtu", "Prio", "Interface");
217: break;
218: default:
1.32 bluhm 219: printf("%-*.*s %-*.*s %-6.6s %5.5s %8.8s %5.5s %4.4s %s",
1.13 claudio 220: WID_DST(af), WID_DST(af), "Destination",
221: WID_GW(af), WID_GW(af), "Gateway",
222: "Flags", "Refs", "Use", "Mtu", "Prio", "Iface");
1.33 bluhm 223: if (vflag && !Aflag)
1.32 bluhm 224: printf(" %s", "Label");
225: putchar('\n');
1.13 claudio 226: break;
227: }
1.1 claudio 228: }
229:
230: static void
231: get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info)
232: {
233: int i;
234:
235: for (i = 0; i < RTAX_MAX; i++) {
236: if (addrs & (1 << i)) {
237: rti_info[i] = sa;
238: sa = (struct sockaddr *)((char *)(sa) +
239: ROUNDUP(sa->sa_len));
240: } else
241: rti_info[i] = NULL;
242: }
243: }
244:
245: /*
246: * Print a routing table entry.
247: */
248: void
249: p_rtentry(struct rt_msghdr *rtm)
250: {
251: static int old_af = -1;
1.22 chris 252: struct sockaddr *sa = (struct sockaddr *)((char *)rtm + rtm->rtm_hdrlen);
1.1 claudio 253: struct sockaddr *mask, *rti_info[RTAX_MAX];
254: char ifbuf[IF_NAMESIZE];
255:
256: if (sa->sa_family == AF_KEY)
257: return;
258:
1.5 pyr 259: get_rtaddrs(rtm->rtm_addrs, sa, rti_info);
1.41 claudio 260:
1.5 pyr 261: if (Fflag && rti_info[RTAX_GATEWAY]->sa_family != sa->sa_family) {
262: return;
263: }
1.1 claudio 264: if (old_af != sa->sa_family) {
265: old_af = sa->sa_family;
266: pr_family(sa->sa_family);
267: pr_rthdr(sa->sa_family, 0);
268: }
269:
270: mask = rti_info[RTAX_NETMASK];
271: if ((sa = rti_info[RTAX_DST]) == NULL)
272: return;
273:
274: p_sockaddr(sa, mask, rtm->rtm_flags, WID_DST(sa->sa_family));
1.19 michele 275: p_sockaddr_mpls(sa, rti_info[RTAX_SRC], rtm->rtm_mpls,
1.17 michele 276: WID_DST(sa->sa_family));
277:
1.1 claudio 278: p_sockaddr(rti_info[RTAX_GATEWAY], NULL, RTF_HOST,
279: WID_GW(sa->sa_family));
1.30 claudio 280:
1.1 claudio 281: p_flags(rtm->rtm_flags, "%-6.6s ");
1.13 claudio 282: printf("%5u %8llu ", rtm->rtm_rmx.rmx_refcnt,
1.1 claudio 283: rtm->rtm_rmx.rmx_pksent);
284: if (rtm->rtm_rmx.rmx_mtu)
1.13 claudio 285: printf("%5u ", rtm->rtm_rmx.rmx_mtu);
1.1 claudio 286: else
1.13 claudio 287: printf("%5s ", "-");
1.1 claudio 288: putchar((rtm->rtm_rmx.rmx_locks & RTV_MTU) ? 'L' : ' ');
1.32 bluhm 289: printf(" %2d %-5.16s", rtm->rtm_priority,
1.13 claudio 290: if_indextoname(rtm->rtm_index, ifbuf));
1.32 bluhm 291: if (vflag && rti_info[RTAX_LABEL])
292: printf(" %s", ((struct sockaddr_rtlabel *)
293: rti_info[RTAX_LABEL])->sr_label);
1.1 claudio 294: putchar('\n');
295: }
296:
297: /*
298: * Print address family header before a section of the routing table.
299: */
300: void
301: pr_family(int af)
302: {
303: char *afname;
304:
305: switch (af) {
306: case AF_INET:
307: afname = "Internet";
308: break;
309: case AF_INET6:
310: afname = "Internet6";
311: break;
312: case PF_KEY:
313: afname = "Encap";
314: break;
1.13 claudio 315: case AF_MPLS:
316: afname = "MPLS";
317: break;
1.1 claudio 318: default:
319: afname = NULL;
320: break;
321: }
322: if (afname)
323: printf("\n%s:\n", afname);
324: else
325: printf("\nProtocol Family %d:\n", af);
326: }
327:
328: void
329: p_addr(struct sockaddr *sa, struct sockaddr *mask, int flags)
330: {
331: p_sockaddr(sa, mask, flags, WID_DST(sa->sa_family));
332: }
333:
334: void
335: p_gwaddr(struct sockaddr *sa, int af)
336: {
337: p_sockaddr(sa, 0, RTF_HOST, WID_GW(af));
338: }
339:
340: void
341: p_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags, int width)
342: {
343: char *cp;
344:
345: switch (sa->sa_family) {
346: case AF_INET6:
347: {
348: struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
349: struct in6_addr *in6 = &sa6->sin6_addr;
350:
351: /*
352: * XXX: This is a special workaround for KAME kernels.
353: * sin6_scope_id field of SA should be set in the future.
354: */
355: if (IN6_IS_ADDR_LINKLOCAL(in6) ||
1.3 itojun 356: IN6_IS_ADDR_MC_LINKLOCAL(in6) ||
357: IN6_IS_ADDR_MC_INTFACELOCAL(in6)) {
1.1 claudio 358: /* XXX: override is ok? */
359: sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)
360: &in6->s6_addr[2]);
361: *(u_short *)&in6->s6_addr[2] = 0;
362: }
363: if (flags & RTF_HOST)
364: cp = routename((struct sockaddr *)sa6);
365: else
366: cp = netname((struct sockaddr *)sa6, mask);
367: break;
368: }
1.16 michele 369: case AF_MPLS:
1.17 michele 370: return;
1.1 claudio 371: default:
372: if ((flags & RTF_HOST) || mask == NULL)
373: cp = routename(sa);
374: else
375: cp = netname(sa, mask);
376: break;
377: }
378: if (width < 0)
379: printf("%s", cp);
380: else {
381: if (nflag)
382: printf("%-*s ", width, cp);
383: else
384: printf("%-*.*s ", width, width, cp);
385: }
386: }
387:
1.44 deraadt 388: static char line[HOST_NAME_MAX+1];
389: static char domain[HOST_NAME_MAX+1];
1.17 michele 390:
391: void
392: p_sockaddr_mpls(struct sockaddr *in, struct sockaddr *out, int flags, int width)
393: {
394: if (in->sa_family != AF_MPLS)
395: return;
396:
1.30 claudio 397: if (flags & MPLS_OP_POP || flags == MPLS_OP_LOCAL) {
398: printf("%-*s ", width, label_print(in));
399: printf("%-*s ", width, label_print(NULL));
400: } else {
401: printf("%-*s ", width, label_print(in));
402: printf("%-*s ", width, label_print(out));
403: }
1.17 michele 404:
1.30 claudio 405: printf("%-6s ", mpls_op(flags));
1.17 michele 406: }
407:
1.1 claudio 408: void
409: p_flags(int f, char *format)
410: {
411: char name[33], *flags;
412: const struct bits *p = bits;
413:
414: for (flags = name; p->b_mask && flags < &name[sizeof(name) - 2]; p++)
415: if (p->b_mask & f)
416: *flags++ = p->b_val;
417: *flags = '\0';
418: printf(format, name);
419: }
420:
421: char *
422: routename(struct sockaddr *sa)
423: {
424: char *cp = NULL;
425: static int first = 1;
426:
427: if (first) {
428: first = 0;
429: if (gethostname(domain, sizeof(domain)) == 0 &&
430: (cp = strchr(domain, '.')))
431: (void)strlcpy(domain, cp + 1, sizeof(domain));
432: else
433: domain[0] = '\0';
434: cp = NULL;
435: }
436:
437: if (sa->sa_len == 0) {
438: (void)strlcpy(line, "default", sizeof(line));
439: return (line);
440: }
441:
442: switch (sa->sa_family) {
443: case AF_INET:
444: return
445: (routename4(((struct sockaddr_in *)sa)->sin_addr.s_addr));
446:
447: case AF_INET6:
448: {
449: struct sockaddr_in6 sin6;
450:
451: memset(&sin6, 0, sizeof(sin6));
452: memcpy(&sin6, sa, sa->sa_len);
453: sin6.sin6_len = sizeof(struct sockaddr_in6);
454: sin6.sin6_family = AF_INET6;
455: if (sa->sa_len == sizeof(struct sockaddr_in6) &&
456: (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
1.3 itojun 457: IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr) ||
458: IN6_IS_ADDR_MC_INTFACELOCAL(&sin6.sin6_addr)) &&
1.1 claudio 459: sin6.sin6_scope_id == 0) {
460: sin6.sin6_scope_id =
461: ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
462: sin6.sin6_addr.s6_addr[2] = 0;
463: sin6.sin6_addr.s6_addr[3] = 0;
464: }
465: return (routename6(&sin6));
466: }
467:
468: case AF_LINK:
469: return (link_print(sa));
1.13 claudio 470: case AF_MPLS:
1.30 claudio 471: return (label_print(sa));
1.1 claudio 472: case AF_UNSPEC:
473: if (sa->sa_len == sizeof(struct sockaddr_rtlabel)) {
474: static char name[RTLABEL_LEN];
475: struct sockaddr_rtlabel *sr;
476:
477: sr = (struct sockaddr_rtlabel *)sa;
1.9 claudio 478: (void)strlcpy(name, sr->sr_label, sizeof(name));
1.1 claudio 479: return (name);
480: }
481: /* FALLTHROUGH */
482: default:
483: (void)snprintf(line, sizeof(line), "(%d) %s",
484: sa->sa_family, any_ntoa(sa));
485: break;
486: }
487: return (line);
488: }
489:
490: char *
491: routename4(in_addr_t in)
492: {
493: char *cp = NULL;
494: struct in_addr ina;
495: struct hostent *hp;
496:
497: if (in == INADDR_ANY)
498: cp = "default";
499: if (!cp && !nflag) {
500: if ((hp = gethostbyaddr((char *)&in,
501: sizeof(in), AF_INET)) != NULL) {
502: if ((cp = strchr(hp->h_name, '.')) &&
503: !strcmp(cp + 1, domain))
504: *cp = '\0';
505: cp = hp->h_name;
506: }
507: }
508: ina.s_addr = in;
509: strlcpy(line, cp ? cp : inet_ntoa(ina), sizeof(line));
510:
511: return (line);
512: }
513:
514: char *
515: routename6(struct sockaddr_in6 *sin6)
516: {
517: int niflags = 0;
518:
519: if (nflag)
520: niflags |= NI_NUMERICHOST;
521: else
522: niflags |= NI_NOFQDN;
523:
524: if (getnameinfo((struct sockaddr *)sin6, sin6->sin6_len,
525: line, sizeof(line), NULL, 0, niflags) != 0)
526: strncpy(line, "invalid", sizeof(line));
527:
528: return (line);
529: }
530:
531: /*
532: * Return the name of the network whose address is given.
533: * The address is assumed to be that of a net or subnet, not a host.
534: */
535: char *
536: netname4(in_addr_t in, in_addr_t mask)
537: {
538: int mbits;
539:
540: in = ntohl(in);
541: mask = ntohl(mask);
1.43 schwarze 542: mbits = mask ? 33 - ffs(mask) : 0;
1.28 dlg 543: if (in == INADDR_ANY && mask == INADDR_ANY)
1.43 schwarze 544: strlcpy(line, "default", sizeof(line));
1.1 claudio 545: #define C(x) ((x) & 0xff)
546: else if (mbits < 9)
547: snprintf(line, sizeof(line), "%u/%d", C(in >> 24), mbits);
548: else if (mbits < 17)
549: snprintf(line, sizeof(line), "%u.%u/%d",
550: C(in >> 24) , C(in >> 16), mbits);
551: else if (mbits < 25)
552: snprintf(line, sizeof(line), "%u.%u.%u/%d",
553: C(in >> 24), C(in >> 16), C(in >> 8), mbits);
554: else
555: snprintf(line, sizeof(line), "%u.%u.%u.%u/%d", C(in >> 24),
556: C(in >> 16), C(in >> 8), C(in), mbits);
557: #undef C
558: return (line);
559: }
560:
561: char *
562: netname6(struct sockaddr_in6 *sa6, struct sockaddr_in6 *mask)
563: {
564: struct sockaddr_in6 sin6;
565: u_char *p;
566: int masklen, final = 0, illegal = 0;
567: int i, lim, flag, error;
568: char hbuf[NI_MAXHOST];
569:
570: sin6 = *sa6;
571:
572: flag = 0;
573: masklen = 0;
574: if (mask) {
575: lim = mask->sin6_len - offsetof(struct sockaddr_in6, sin6_addr);
1.4 claudio 576: lim = lim < (int)sizeof(struct in6_addr) ?
1.41 claudio 577: lim : (int)sizeof(struct in6_addr);
1.1 claudio 578: for (p = (u_char *)&mask->sin6_addr, i = 0; i < lim; p++) {
579: if (final && *p) {
580: illegal++;
581: sin6.sin6_addr.s6_addr[i++] = 0x00;
582: continue;
583: }
584:
585: switch (*p & 0xff) {
586: case 0xff:
587: masklen += 8;
588: break;
589: case 0xfe:
590: masklen += 7;
591: final++;
592: break;
593: case 0xfc:
594: masklen += 6;
595: final++;
596: break;
597: case 0xf8:
598: masklen += 5;
599: final++;
600: break;
601: case 0xf0:
602: masklen += 4;
603: final++;
604: break;
605: case 0xe0:
606: masklen += 3;
607: final++;
608: break;
609: case 0xc0:
610: masklen += 2;
611: final++;
612: break;
613: case 0x80:
614: masklen += 1;
615: final++;
616: break;
617: case 0x00:
618: final++;
619: break;
620: default:
621: final++;
622: illegal++;
623: break;
624: }
625:
626: if (!illegal)
627: sin6.sin6_addr.s6_addr[i++] &= *p;
628: else
629: sin6.sin6_addr.s6_addr[i++] = 0x00;
630: }
1.41 claudio 631: while (i < (int)sizeof(struct in6_addr))
1.1 claudio 632: sin6.sin6_addr.s6_addr[i++] = 0x00;
633: } else
634: masklen = 128;
635:
636: if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr))
637: return ("default");
638:
639: if (illegal)
640: warnx("illegal prefixlen");
641:
642: if (nflag)
643: flag |= NI_NUMERICHOST;
644: error = getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
645: hbuf, sizeof(hbuf), NULL, 0, flag);
646: if (error)
647: snprintf(hbuf, sizeof(hbuf), "invalid");
648:
649: snprintf(line, sizeof(line), "%s/%d", hbuf, masklen);
650: return (line);
651: }
652:
653: /*
654: * Return the name of the network whose address is given.
655: * The address is assumed to be that of a net or subnet, not a host.
656: */
657: char *
658: netname(struct sockaddr *sa, struct sockaddr *mask)
659: {
660: switch (sa->sa_family) {
661: case AF_INET:
662: return netname4(((struct sockaddr_in *)sa)->sin_addr.s_addr,
1.29 claudio 663: mask->sa_len == 0 ? 0 :
1.1 claudio 664: ((struct sockaddr_in *)mask)->sin_addr.s_addr);
665: case AF_INET6:
666: return netname6((struct sockaddr_in6 *)sa,
667: (struct sockaddr_in6 *)mask);
668: case AF_LINK:
669: return (link_print(sa));
1.13 claudio 670: case AF_MPLS:
1.30 claudio 671: return (label_print(sa));
1.1 claudio 672: default:
673: snprintf(line, sizeof(line), "af %d: %s",
674: sa->sa_family, any_ntoa(sa));
675: break;
676: }
677: return (line);
678: }
679:
680: static const char hexlist[] = "0123456789abcdef";
681:
682: char *
683: any_ntoa(const struct sockaddr *sa)
684: {
685: static char obuf[240];
686: const char *in = sa->sa_data;
687: char *out = obuf;
688: int len = sa->sa_len - offsetof(struct sockaddr, sa_data);
689:
690: *out++ = 'Q';
691: do {
692: *out++ = hexlist[(*in >> 4) & 15];
693: *out++ = hexlist[(*in++) & 15];
694: *out++ = '.';
695: } while (--len > 0 && (out + 3) < &obuf[sizeof(obuf) - 1]);
696: out[-1] = '\0';
697: return (obuf);
698: }
699:
700: char *
701: link_print(struct sockaddr *sa)
702: {
703: struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
704: u_char *lla = (u_char *)sdl->sdl_data + sdl->sdl_nlen;
705:
706: if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
707: sdl->sdl_slen == 0) {
708: (void)snprintf(line, sizeof(line), "link#%d", sdl->sdl_index);
709: return (line);
710: }
711: switch (sdl->sdl_type) {
712: case IFT_ETHER:
713: case IFT_CARP:
714: return (ether_ntoa((struct ether_addr *)lla));
715: default:
716: return (link_ntoa(sdl));
717: }
1.13 claudio 718: }
719:
720: char *
1.30 claudio 721: mpls_op(u_int32_t type)
1.13 claudio 722: {
1.16 michele 723: switch (type & (MPLS_OP_PUSH | MPLS_OP_POP | MPLS_OP_SWAP)) {
1.21 michele 724: case MPLS_OP_LOCAL:
725: return ("LOCAL");
1.13 claudio 726: case MPLS_OP_POP:
727: return ("POP");
728: case MPLS_OP_SWAP:
729: return ("SWAP");
730: case MPLS_OP_PUSH:
731: return ("PUSH");
732: default:
733: return ("?");
734: }
735: }
736:
737: char *
1.30 claudio 738: label_print(struct sockaddr *sa)
1.13 claudio 739: {
1.30 claudio 740: struct sockaddr_mpls *smpls = (struct sockaddr_mpls *)sa;
1.13 claudio 741:
1.30 claudio 742: if (smpls)
743: (void)snprintf(line, sizeof(line), "%u",
744: ntohl(smpls->smpls_label) >> MPLS_LABEL_OFFSET);
745: else
746: (void)snprintf(line, sizeof(line), "-");
1.13 claudio 747:
748: return (line);
1.1 claudio 749: }
![[BACK]](/icons/back.gif){kind=icon}
Return to show.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / netstat