1: /*
2: * BIRD -- Management of Interfaces and Neighbor Cache
3: *
4: * (c) 1998--2000 Martin Mares <mj@ucw.cz>
5: *
6: * Can be freely distributed and used under the terms of the GNU GPL.
7: */
8:
9: /**
10: * DOC: Interfaces
11: *
12: * The interface module keeps track of all network interfaces in the
13: * system and their addresses.
14: *
15: * Each interface is represented by an &iface structure which carries
16: * interface capability flags (%IF_MULTIACCESS, %IF_BROADCAST etc.),
17: * MTU, interface name and index and finally a linked list of network
18: * prefixes assigned to the interface, each one represented by
19: * struct &ifa.
20: *
21: * The interface module keeps a `soft-up' state for each &iface which
22: * is a conjunction of link being up, the interface being of a `sane'
23: * type and at least one IP address assigned to it.
24: */
25:
26: #undef LOCAL_DEBUG
27:
28: #include "nest/bird.h"
29: #include "nest/iface.h"
30: #include "nest/protocol.h"
31: #include "nest/cli.h"
32: #include "lib/resource.h"
33: #include "lib/string.h"
34: #include "conf/conf.h"
35:
36: static pool *if_pool;
37:
38: list iface_list;
39:
40: /**
41: * ifa_dump - dump interface address
42: * @a: interface address descriptor
43: *
44: * This function dumps contents of an &ifa to the debug output.
45: */
46: void
47: ifa_dump(struct ifa *a)
48: {
49: debug("\t%I, net %I/%-2d bc %I -> %I%s%s%s\n", a->ip, a->prefix, a->pxlen, a->brd, a->opposite,
50: (a->flags & IF_UP) ? "" : " DOWN",
51: (a->flags & IA_PRIMARY) ? "" : " SEC",
52: (a->flags & IA_PEER) ? "PEER" : "");
53: }
54:
55: /**
56: * if_dump - dump interface
57: * @i: interface to dump
58: *
59: * This function dumps all information associated with a given
60: * network interface to the debug output.
61: */
62: void
63: if_dump(struct iface *i)
64: {
65: struct ifa *a;
66:
67: debug("IF%d: %s", i->index, i->name);
68: if (i->flags & IF_SHUTDOWN)
69: debug(" SHUTDOWN");
70: if (i->flags & IF_UP)
71: debug(" UP");
72: else
73: debug(" DOWN");
74: if (i->flags & IF_ADMIN_UP)
75: debug(" LINK-UP");
76: if (i->flags & IF_MULTIACCESS)
77: debug(" MA");
78: if (i->flags & IF_BROADCAST)
79: debug(" BC");
80: if (i->flags & IF_MULTICAST)
81: debug(" MC");
82: if (i->flags & IF_LOOPBACK)
83: debug(" LOOP");
84: if (i->flags & IF_IGNORE)
85: debug(" IGN");
86: if (i->flags & IF_TMP_DOWN)
87: debug(" TDOWN");
88: debug(" MTU=%d\n", i->mtu);
89: WALK_LIST(a, i->addrs)
90: {
91: ifa_dump(a);
92: ASSERT((a != i->addr) == !(a->flags & IA_PRIMARY));
93: }
94: }
95:
96: /**
97: * if_dump_all - dump all interfaces
98: *
99: * This function dumps information about all known network
100: * interfaces to the debug output.
101: */
102: void
103: if_dump_all(void)
104: {
105: struct iface *i;
106:
107: debug("Known network interfaces:\n");
108: WALK_LIST(i, iface_list)
109: if_dump(i);
110: debug("Router ID: %08x\n", config->router_id);
111: }
112:
113: static inline unsigned
114: if_what_changed(struct iface *i, struct iface *j)
115: {
116: unsigned c;
117:
118: if (((i->flags ^ j->flags) & ~(IF_UP | IF_SHUTDOWN | IF_UPDATED | IF_ADMIN_UP | IF_LINK_UP | IF_TMP_DOWN | IF_JUST_CREATED))
119: || i->index != j->index)
120: return IF_CHANGE_TOO_MUCH;
121: c = 0;
122: if ((i->flags ^ j->flags) & IF_UP)
123: c |= (i->flags & IF_UP) ? IF_CHANGE_DOWN : IF_CHANGE_UP;
124: if ((i->flags ^ j->flags) & IF_LINK_UP)
125: c |= IF_CHANGE_LINK;
126: if (i->mtu != j->mtu)
127: c |= IF_CHANGE_MTU;
128: return c;
129: }
130:
131: static inline void
132: if_copy(struct iface *to, struct iface *from)
133: {
134: to->flags = from->flags | (to->flags & IF_TMP_DOWN);
135: to->mtu = from->mtu;
136: }
137:
138: static inline void
139: ifa_send_notify(struct proto *p, unsigned c, struct ifa *a)
140: {
141: if (p->ifa_notify)
142: {
143: if (p->debug & D_IFACES)
144: log(L_TRACE "%s < %s address %I/%d on interface %s %s",
145: p->name, (a->flags & IA_PRIMARY) ? "primary" : "secondary",
146: a->prefix, a->pxlen, a->iface->name,
147: (c & IF_CHANGE_UP) ? "added" : "removed");
148: p->ifa_notify(p, c, a);
149: }
150: }
151:
152: static void
153: ifa_notify_change_(unsigned c, struct ifa *a)
154: {
155: struct proto *p;
156:
157: DBG("IFA change notification (%x) for %s:%I\n", c, a->iface->name, a->ip);
158:
159: WALK_LIST(p, active_proto_list)
160: ifa_send_notify(p, c, a);
161: }
162:
163: static inline void
164: ifa_notify_change(unsigned c, struct ifa *a)
165: {
166: if (c & IF_CHANGE_DOWN)
167: neigh_ifa_update(a);
168:
169: ifa_notify_change_(c, a);
170:
171: if (c & IF_CHANGE_UP)
172: neigh_ifa_update(a);
173: }
174:
175: static inline void
176: if_send_notify(struct proto *p, unsigned c, struct iface *i)
177: {
178: if (p->if_notify)
179: {
180: if (p->debug & D_IFACES)
181: log(L_TRACE "%s < interface %s %s", p->name, i->name,
182: (c & IF_CHANGE_UP) ? "goes up" :
183: (c & IF_CHANGE_DOWN) ? "goes down" :
184: (c & IF_CHANGE_MTU) ? "changes MTU" :
185: (c & IF_CHANGE_LINK) ? "changes link" :
186: (c & IF_CHANGE_CREATE) ? "created" :
187: "sends unknown event");
188: p->if_notify(p, c, i);
189: }
190: }
191:
192: static void
193: if_notify_change(unsigned c, struct iface *i)
194: {
195: struct proto *p;
196: struct ifa *a;
197:
198: if (i->flags & IF_JUST_CREATED)
199: {
200: i->flags &= ~IF_JUST_CREATED;
201: c |= IF_CHANGE_CREATE | IF_CHANGE_MTU;
202: }
203:
204: DBG("Interface change notification (%x) for %s\n", c, i->name);
205: #ifdef LOCAL_DEBUG
206: if_dump(i);
207: #endif
208:
209: if (c & IF_CHANGE_DOWN)
210: neigh_if_down(i);
211:
212: if (c & IF_CHANGE_DOWN)
213: WALK_LIST(a, i->addrs)
214: {
215: a->flags = (i->flags & ~IA_FLAGS) | (a->flags & IA_FLAGS);
216: ifa_notify_change_(IF_CHANGE_DOWN, a);
217: }
218:
219: WALK_LIST(p, active_proto_list)
220: if_send_notify(p, c, i);
221:
222: if (c & IF_CHANGE_UP)
223: WALK_LIST(a, i->addrs)
224: {
225: a->flags = (i->flags & ~IA_FLAGS) | (a->flags & IA_FLAGS);
226: ifa_notify_change_(IF_CHANGE_UP, a);
227: }
228:
229: if (c & IF_CHANGE_UP)
230: neigh_if_up(i);
231:
232: if ((c & (IF_CHANGE_UP | IF_CHANGE_DOWN | IF_CHANGE_LINK)) == IF_CHANGE_LINK)
233: neigh_if_link(i);
234: }
235:
236: static unsigned
237: if_recalc_flags(struct iface *i, unsigned flags)
238: {
239: if ((flags & (IF_SHUTDOWN | IF_TMP_DOWN)) ||
240: !(flags & IF_ADMIN_UP) ||
241: !i->addr)
242: flags &= ~IF_UP;
243: else
244: flags |= IF_UP;
245: return flags;
246: }
247:
248: static void
249: if_change_flags(struct iface *i, unsigned flags)
250: {
251: unsigned of = i->flags;
252:
253: i->flags = if_recalc_flags(i, flags);
254: if ((i->flags ^ of) & IF_UP)
255: if_notify_change((i->flags & IF_UP) ? IF_CHANGE_UP : IF_CHANGE_DOWN, i);
256: }
257:
258: /**
259: * if_delete - remove interface
260: * @old: interface
261: *
262: * This function is called by the low-level platform dependent code
263: * whenever it notices an interface disappears. It is just a shorthand
264: * for if_update().
265: */
266:
267: void
268: if_delete(struct iface *old)
269: {
270: struct iface f = {};
271: strncpy(f.name, old->name, sizeof(f.name)-1);
272: f.flags = IF_SHUTDOWN;
273: if_update(&f);
274: }
275:
276: /**
277: * if_update - update interface status
278: * @new: new interface status
279: *
280: * if_update() is called by the low-level platform dependent code
281: * whenever it notices an interface change.
282: *
283: * There exist two types of interface updates -- synchronous and asynchronous
284: * ones. In the synchronous case, the low-level code calls if_start_update(),
285: * scans all interfaces reported by the OS, uses if_update() and ifa_update()
286: * to pass them to the core and then it finishes the update sequence by
287: * calling if_end_update(). When working asynchronously, the sysdep code
288: * calls if_update() and ifa_update() whenever it notices a change.
289: *
290: * if_update() will automatically notify all other modules about the change.
291: */
292: struct iface *
293: if_update(struct iface *new)
294: {
295: struct iface *i;
296: unsigned c;
297:
298: WALK_LIST(i, iface_list)
299: if (!strcmp(new->name, i->name))
300: {
301: new->addr = i->addr;
302: new->flags = if_recalc_flags(new, new->flags);
303: c = if_what_changed(i, new);
304: if (c & IF_CHANGE_TOO_MUCH) /* Changed a lot, convert it to down/up */
305: {
306: DBG("Interface %s changed too much -- forcing down/up transition\n", i->name);
307: if_change_flags(i, i->flags | IF_TMP_DOWN);
308: rem_node(&i->n);
309: new->addr = i->addr;
310: memcpy(&new->addrs, &i->addrs, sizeof(i->addrs));
311: memcpy(i, new, sizeof(*i));
312: i->flags &= ~IF_UP; /* IF_TMP_DOWN will be added later */
313: goto newif;
314: }
315:
316: if_copy(i, new);
317: if (c)
318: if_notify_change(c, i);
319:
320: i->flags |= IF_UPDATED;
321: return i;
322: }
323: i = mb_alloc(if_pool, sizeof(struct iface));
324: memcpy(i, new, sizeof(*i));
325: init_list(&i->addrs);
326: newif:
327: init_list(&i->neighbors);
328: i->flags |= IF_UPDATED | IF_TMP_DOWN; /* Tmp down as we don't have addresses yet */
329: add_tail(&iface_list, &i->n);
330: return i;
331: }
332:
333: void
334: if_start_update(void)
335: {
336: struct iface *i;
337: struct ifa *a;
338:
339: WALK_LIST(i, iface_list)
340: {
341: i->flags &= ~IF_UPDATED;
342: WALK_LIST(a, i->addrs)
343: a->flags &= ~IF_UPDATED;
344: }
345: }
346:
347: void
348: if_end_partial_update(struct iface *i)
349: {
350: if (i->flags & IF_TMP_DOWN)
351: if_change_flags(i, i->flags & ~IF_TMP_DOWN);
352: }
353:
354: void
355: if_end_update(void)
356: {
357: struct iface *i;
358: struct ifa *a, *b;
359:
360: WALK_LIST(i, iface_list)
361: {
362: if (!(i->flags & IF_UPDATED))
363: if_change_flags(i, (i->flags & ~IF_ADMIN_UP) | IF_SHUTDOWN);
364: else
365: {
366: WALK_LIST_DELSAFE(a, b, i->addrs)
367: if (!(a->flags & IF_UPDATED))
368: ifa_delete(a);
369: if_end_partial_update(i);
370: }
371: }
372: }
373:
374: void
375: if_flush_ifaces(struct proto *p)
376: {
377: if (p->debug & D_EVENTS)
378: log(L_TRACE "%s: Flushing interfaces", p->name);
379: if_start_update();
380: if_end_update();
381: }
382:
383: /**
384: * if_feed_baby - advertise interfaces to a new protocol
385: * @p: protocol to feed
386: *
387: * When a new protocol starts, this function sends it a series
388: * of notifications about all existing interfaces.
389: */
390: void
391: if_feed_baby(struct proto *p)
392: {
393: struct iface *i;
394: struct ifa *a;
395:
396: if (!p->if_notify && !p->ifa_notify) /* shortcut */
397: return;
398: DBG("Announcing interfaces to new protocol %s\n", p->name);
399: WALK_LIST(i, iface_list)
400: {
401: if_send_notify(p, IF_CHANGE_CREATE | ((i->flags & IF_UP) ? IF_CHANGE_UP : 0), i);
402: if (i->flags & IF_UP)
403: WALK_LIST(a, i->addrs)
404: ifa_send_notify(p, IF_CHANGE_CREATE | IF_CHANGE_UP, a);
405: }
406: }
407:
408: /**
409: * if_find_by_index - find interface by ifindex
410: * @idx: ifindex
411: *
412: * This function finds an &iface structure corresponding to an interface
413: * of the given index @idx. Returns a pointer to the structure or %NULL
414: * if no such structure exists.
415: */
416: struct iface *
417: if_find_by_index(unsigned idx)
418: {
419: struct iface *i;
420:
421: WALK_LIST(i, iface_list)
422: if (i->index == idx && !(i->flags & IF_SHUTDOWN))
423: return i;
424: return NULL;
425: }
426:
427: /**
428: * if_find_by_name - find interface by name
429: * @name: interface name
430: *
431: * This function finds an &iface structure corresponding to an interface
432: * of the given name @name. Returns a pointer to the structure or %NULL
433: * if no such structure exists.
434: */
435: struct iface *
436: if_find_by_name(char *name)
437: {
438: struct iface *i;
439:
440: WALK_LIST(i, iface_list)
441: if (!strcmp(i->name, name))
442: return i;
443: return NULL;
444: }
445:
446: struct iface *
447: if_get_by_name(char *name)
448: {
449: struct iface *i;
450:
451: if (i = if_find_by_name(name))
452: return i;
453:
454: /* No active iface, create a dummy */
455: i = mb_allocz(if_pool, sizeof(struct iface));
456: strncpy(i->name, name, sizeof(i->name)-1);
457: i->flags = IF_SHUTDOWN;
458: init_list(&i->addrs);
459: init_list(&i->neighbors);
460: add_tail(&iface_list, &i->n);
461: return i;
462: }
463:
464: struct ifa *kif_choose_primary(struct iface *i);
465:
466: static int
467: ifa_recalc_primary(struct iface *i)
468: {
469: struct ifa *a = kif_choose_primary(i);
470:
471: if (a == i->addr)
472: return 0;
473:
474: if (i->addr)
475: i->addr->flags &= ~IA_PRIMARY;
476:
477: if (a)
478: {
479: a->flags |= IA_PRIMARY;
480: rem_node(&a->n);
481: add_head(&i->addrs, &a->n);
482: }
483:
484: i->addr = a;
485: return 1;
486: }
487:
488: void
489: ifa_recalc_all_primary_addresses(void)
490: {
491: struct iface *i;
492:
493: WALK_LIST(i, iface_list)
494: {
495: if (ifa_recalc_primary(i))
496: if_change_flags(i, i->flags | IF_TMP_DOWN);
497: }
498: }
499:
500: static inline int
501: ifa_same(struct ifa *a, struct ifa *b)
502: {
503: return ipa_equal(a->ip, b->ip) && ipa_equal(a->prefix, b->prefix) &&
504: a->pxlen == b->pxlen;
505: }
506:
507:
508: /**
509: * ifa_update - update interface address
510: * @a: new interface address
511: *
512: * This function adds address information to a network
513: * interface. It's called by the platform dependent code during
514: * the interface update process described under if_update().
515: */
516: struct ifa *
517: ifa_update(struct ifa *a)
518: {
519: struct iface *i = a->iface;
520: struct ifa *b;
521:
522: WALK_LIST(b, i->addrs)
523: if (ifa_same(b, a))
524: {
525: if (ipa_equal(b->brd, a->brd) &&
526: ipa_equal(b->opposite, a->opposite) &&
527: b->scope == a->scope &&
528: !((b->flags ^ a->flags) & IA_PEER))
529: {
530: b->flags |= IF_UPDATED;
531: return b;
532: }
533: ifa_delete(b);
534: break;
535: }
536:
537: #ifndef IPV6
538: if ((i->flags & IF_BROADCAST) && !ipa_nonzero(a->brd))
539: log(L_ERR "Missing broadcast address for interface %s", i->name);
540: #endif
541:
542: b = mb_alloc(if_pool, sizeof(struct ifa));
543: memcpy(b, a, sizeof(struct ifa));
544: add_tail(&i->addrs, &b->n);
545: b->flags = (i->flags & ~IA_FLAGS) | (a->flags & IA_FLAGS);
546: if (ifa_recalc_primary(i))
547: if_change_flags(i, i->flags | IF_TMP_DOWN);
548: if (b->flags & IF_UP)
549: ifa_notify_change(IF_CHANGE_CREATE | IF_CHANGE_UP, b);
550: return b;
551: }
552:
553: /**
554: * ifa_delete - remove interface address
555: * @a: interface address
556: *
557: * This function removes address information from a network
558: * interface. It's called by the platform dependent code during
559: * the interface update process described under if_update().
560: */
561: void
562: ifa_delete(struct ifa *a)
563: {
564: struct iface *i = a->iface;
565: struct ifa *b;
566:
567: WALK_LIST(b, i->addrs)
568: if (ifa_same(b, a))
569: {
570: rem_node(&b->n);
571: if (b->flags & IF_UP)
572: {
573: b->flags &= ~IF_UP;
574: ifa_notify_change(IF_CHANGE_DOWN, b);
575: }
576: if (b->flags & IA_PRIMARY)
577: {
578: if_change_flags(i, i->flags | IF_TMP_DOWN);
579: ifa_recalc_primary(i);
580: }
581: mb_free(b);
582: return;
583: }
584: }
585:
586: u32
587: if_choose_router_id(struct iface_patt *mask UNUSED6, u32 old_id UNUSED6)
588: {
589: #ifndef IPV6
590: struct iface *i;
591: struct ifa *a, *b;
592:
593: b = NULL;
594: WALK_LIST(i, iface_list)
595: {
596: if (!(i->flags & IF_ADMIN_UP) ||
597: (i->flags & IF_SHUTDOWN))
598: continue;
599:
600: WALK_LIST(a, i->addrs)
601: {
602: if (a->flags & IA_SECONDARY)
603: continue;
604:
605: if (a->scope <= SCOPE_LINK)
606: continue;
607:
608: /* Check pattern if specified */
609: if (mask && !iface_patt_match(mask, i, a))
610: continue;
611:
612: /* No pattern or pattern matched */
613: if (!b || ipa_to_u32(a->ip) < ipa_to_u32(b->ip))
614: b = a;
615: }
616: }
617:
618: if (!b)
619: return 0;
620:
621: u32 id = ipa_to_u32(b->ip);
622: if (id != old_id)
623: log(L_INFO "Chosen router ID %R according to interface %s", id, b->iface->name);
624:
625: return id;
626:
627: #else
628: return 0;
629: #endif
630: }
631:
632: /**
633: * if_init - initialize interface module
634: *
635: * This function is called during BIRD startup to initialize
636: * all data structures of the interface module.
637: */
638: void
639: if_init(void)
640: {
641: if_pool = rp_new(&root_pool, "Interfaces");
642: init_list(&iface_list);
643: neigh_init(if_pool);
644: }
645:
646: /*
647: * Interface Pattern Lists
648: */
649:
650: int
651: iface_patt_match(struct iface_patt *ifp, struct iface *i, struct ifa *a)
652: {
653: struct iface_patt_node *p;
654:
655: WALK_LIST(p, ifp->ipn_list)
656: {
657: char *t = p->pattern;
658: int pos = p->positive;
659:
660: if (t)
661: {
662: if (*t == '-')
663: {
664: t++;
665: pos = !pos;
666: }
667:
668: if (!patmatch(t, i->name))
669: continue;
670: }
671:
672: if (p->pxlen == 0)
673: return pos;
674:
675: if (!a)
676: continue;
677:
678: if (ipa_in_net(a->ip, p->prefix, p->pxlen))
679: return pos;
680:
681: if ((a->flags & IA_PEER) &&
682: ipa_in_net(a->opposite, p->prefix, p->pxlen))
683: return pos;
684:
685: continue;
686: }
687:
688: return 0;
689: }
690:
691: struct iface_patt *
692: iface_patt_find(list *l, struct iface *i, struct ifa *a)
693: {
694: struct iface_patt *p;
695:
696: WALK_LIST(p, *l)
697: if (iface_patt_match(p, i, a))
698: return p;
699:
700: return NULL;
701: }
702:
703: static int
704: iface_plists_equal(struct iface_patt *pa, struct iface_patt *pb)
705: {
706: struct iface_patt_node *x, *y;
707:
708: x = HEAD(pa->ipn_list);
709: y = HEAD(pb->ipn_list);
710: while (x->n.next && y->n.next)
711: {
712: if ((x->positive != y->positive) ||
713: (!x->pattern && y->pattern) || /* This nasty lines where written by me... :-( Feela */
714: (!y->pattern && x->pattern) ||
715: ((x->pattern != y->pattern) && strcmp(x->pattern, y->pattern)) ||
716: !ipa_equal(x->prefix, y->prefix) ||
717: (x->pxlen != y->pxlen))
718: return 0;
719: x = (void *) x->n.next;
720: y = (void *) y->n.next;
721: }
722: return (!x->n.next && !y->n.next);
723: }
724:
725: int
726: iface_patts_equal(list *a, list *b, int (*comp)(struct iface_patt *, struct iface_patt *))
727: {
728: struct iface_patt *x, *y;
729:
730: x = HEAD(*a);
731: y = HEAD(*b);
732: while (x->n.next && y->n.next)
733: {
734: if (!iface_plists_equal(x, y) ||
735: (comp && !comp(x, y)))
736: return 0;
737: x = (void *) x->n.next;
738: y = (void *) y->n.next;
739: }
740: return (!x->n.next && !y->n.next);
741: }
742:
743: /*
744: * CLI commands.
745: */
746:
747: static void
748: if_show_addr(struct ifa *a)
749: {
750: byte opp[STD_ADDRESS_P_LENGTH + 16];
751:
752: if (ipa_nonzero(a->opposite))
753: bsprintf(opp, ", opposite %I", a->opposite);
754: else
755: opp[0] = 0;
756: cli_msg(-1003, "\t%I/%d (%s%s, scope %s)",
757: a->ip, a->pxlen,
758: (a->flags & IA_PRIMARY) ? "Primary" : (a->flags & IA_SECONDARY) ? "Secondary" : "Unselected",
759: opp, ip_scope_text(a->scope));
760: }
761:
762: void
763: if_show(void)
764: {
765: struct iface *i;
766: struct ifa *a;
767: char *type;
768:
769: WALK_LIST(i, iface_list)
770: {
771: if (i->flags & IF_SHUTDOWN)
772: continue;
773:
774: cli_msg(-1001, "%s %s (index=%d)", i->name, (i->flags & IF_UP) ? "up" : "DOWN", i->index);
775: if (!(i->flags & IF_MULTIACCESS))
776: type = "PtP";
777: else
778: type = "MultiAccess";
779: cli_msg(-1004, "\t%s%s%s Admin%s Link%s%s%s MTU=%d",
780: type,
781: (i->flags & IF_BROADCAST) ? " Broadcast" : "",
782: (i->flags & IF_MULTICAST) ? " Multicast" : "",
783: (i->flags & IF_ADMIN_UP) ? "Up" : "Down",
784: (i->flags & IF_LINK_UP) ? "Up" : "Down",
785: (i->flags & IF_LOOPBACK) ? " Loopback" : "",
786: (i->flags & IF_IGNORE) ? " Ignored" : "",
787: i->mtu);
788: if (i->addr)
789: if_show_addr(i->addr);
790: WALK_LIST(a, i->addrs)
791: if (a != i->addr)
792: if_show_addr(a);
793: }
794: cli_msg(0, "");
795: }
796:
797: void
798: if_show_summary(void)
799: {
800: struct iface *i;
801: byte addr[STD_ADDRESS_P_LENGTH + 16];
802:
803: cli_msg(-2005, "interface state address");
804: WALK_LIST(i, iface_list)
805: {
806: if (i->addr)
807: bsprintf(addr, "%I/%d", i->addr->ip, i->addr->pxlen);
808: else
809: addr[0] = 0;
810: cli_msg(-1005, "%-9s %-5s %s", i->name, (i->flags & IF_UP) ? "up" : "DOWN", addr);
811: }
812: cli_msg(0, "");
813: }
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