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: #include "sysdep/unix/krt.h"
36:
37: static pool *if_pool;
38:
39: list iface_list;
40:
41: static void if_recalc_preferred(struct iface *i);
42:
43: /**
44: * ifa_dump - dump interface address
45: * @a: interface address descriptor
46: *
47: * This function dumps contents of an &ifa to the debug output.
48: */
49: void
50: ifa_dump(struct ifa *a)
51: {
52: debug("\t%I, net %N bc %I -> %I%s%s%s%s\n", a->ip, &a->prefix, a->brd, a->opposite,
53: (a->flags & IA_PRIMARY) ? " PRIMARY" : "",
54: (a->flags & IA_SECONDARY) ? " SEC" : "",
55: (a->flags & IA_HOST) ? " HOST" : "",
56: (a->flags & IA_PEER) ? " PEER" : "");
57: }
58:
59: /**
60: * if_dump - dump interface
61: * @i: interface to dump
62: *
63: * This function dumps all information associated with a given
64: * network interface to the debug output.
65: */
66: void
67: if_dump(struct iface *i)
68: {
69: struct ifa *a;
70:
71: debug("IF%d: %s", i->index, i->name);
72: if (i->flags & IF_SHUTDOWN)
73: debug(" SHUTDOWN");
74: if (i->flags & IF_UP)
75: debug(" UP");
76: else
77: debug(" DOWN");
78: if (i->flags & IF_ADMIN_UP)
79: debug(" LINK-UP");
80: if (i->flags & IF_MULTIACCESS)
81: debug(" MA");
82: if (i->flags & IF_BROADCAST)
83: debug(" BC");
84: if (i->flags & IF_MULTICAST)
85: debug(" MC");
86: if (i->flags & IF_LOOPBACK)
87: debug(" LOOP");
88: if (i->flags & IF_IGNORE)
89: debug(" IGN");
90: if (i->flags & IF_TMP_DOWN)
91: debug(" TDOWN");
92: debug(" MTU=%d\n", i->mtu);
93: WALK_LIST(a, i->addrs)
94: {
95: ifa_dump(a);
96: ASSERT(!!(a->flags & IA_PRIMARY) ==
97: ((a == i->addr4) || (a == i->addr6) || (a == i->llv6)));
98: }
99: }
100:
101: /**
102: * if_dump_all - dump all interfaces
103: *
104: * This function dumps information about all known network
105: * interfaces to the debug output.
106: */
107: void
108: if_dump_all(void)
109: {
110: struct iface *i;
111:
112: debug("Known network interfaces:\n");
113: WALK_LIST(i, iface_list)
114: if_dump(i);
115: debug("Router ID: %08x\n", config->router_id);
116: }
117:
118: static inline unsigned
119: if_what_changed(struct iface *i, struct iface *j)
120: {
121: unsigned c;
122:
123: if (((i->flags ^ j->flags) & ~(IF_UP | IF_SHUTDOWN | IF_UPDATED | IF_ADMIN_UP | IF_LINK_UP | IF_TMP_DOWN | IF_JUST_CREATED))
124: || (i->index != j->index) || (i->master != j->master))
125: return IF_CHANGE_TOO_MUCH;
126: c = 0;
127: if ((i->flags ^ j->flags) & IF_UP)
128: c |= (i->flags & IF_UP) ? IF_CHANGE_DOWN : IF_CHANGE_UP;
129: if ((i->flags ^ j->flags) & IF_LINK_UP)
130: c |= IF_CHANGE_LINK;
131: if (i->mtu != j->mtu)
132: c |= IF_CHANGE_MTU;
133: return c;
134: }
135:
136: static inline void
137: if_copy(struct iface *to, struct iface *from)
138: {
139: to->flags = from->flags | (to->flags & IF_TMP_DOWN);
140: to->mtu = from->mtu;
141: to->master_index = from->master_index;
142: to->master = from->master;
143: }
144:
145: static inline void
146: ifa_send_notify(struct proto *p, unsigned c, struct ifa *a)
147: {
148: if (p->ifa_notify &&
149: (p->proto_state != PS_DOWN) &&
150: (!p->vrf_set || p->vrf == a->iface->master))
151: {
152: if (p->debug & D_IFACES)
153: log(L_TRACE "%s < address %N on interface %s %s",
154: p->name, &a->prefix, a->iface->name,
155: (c & IF_CHANGE_UP) ? "added" : "removed");
156: p->ifa_notify(p, c, a);
157: }
158: }
159:
160: static void
161: ifa_notify_change_(unsigned c, struct ifa *a)
162: {
163: struct proto *p;
164:
165: DBG("IFA change notification (%x) for %s:%I\n", c, a->iface->name, a->ip);
166:
167: WALK_LIST(p, proto_list)
168: ifa_send_notify(p, c, a);
169: }
170:
171: static inline void
172: ifa_notify_change(unsigned c, struct ifa *a)
173: {
174: if (c & IF_CHANGE_DOWN)
175: neigh_ifa_update(a);
176:
177: ifa_notify_change_(c, a);
178:
179: if (c & IF_CHANGE_UP)
180: neigh_ifa_update(a);
181: }
182:
183: static inline void
184: if_send_notify(struct proto *p, unsigned c, struct iface *i)
185: {
186: if (p->if_notify &&
187: (p->proto_state != PS_DOWN) &&
188: (!p->vrf_set || p->vrf == i->master))
189: {
190: if (p->debug & D_IFACES)
191: log(L_TRACE "%s < interface %s %s", p->name, i->name,
192: (c & IF_CHANGE_UP) ? "goes up" :
193: (c & IF_CHANGE_DOWN) ? "goes down" :
194: (c & IF_CHANGE_MTU) ? "changes MTU" :
195: (c & IF_CHANGE_LINK) ? "changes link" :
196: (c & IF_CHANGE_PREFERRED) ? "changes preferred address" :
197: (c & IF_CHANGE_CREATE) ? "created" :
198: "sends unknown event");
199: p->if_notify(p, c, i);
200: }
201: }
202:
203: static void
204: if_notify_change(unsigned c, struct iface *i)
205: {
206: struct proto *p;
207: struct ifa *a;
208:
209: if (i->flags & IF_JUST_CREATED)
210: {
211: i->flags &= ~IF_JUST_CREATED;
212: c |= IF_CHANGE_CREATE | IF_CHANGE_MTU;
213: }
214:
215: DBG("Interface change notification (%x) for %s\n", c, i->name);
216: #ifdef LOCAL_DEBUG
217: if_dump(i);
218: #endif
219:
220: if (c & IF_CHANGE_DOWN)
221: neigh_if_down(i);
222:
223: if (c & IF_CHANGE_DOWN)
224: WALK_LIST(a, i->addrs)
225: ifa_notify_change_(IF_CHANGE_DOWN, a);
226:
227: WALK_LIST(p, proto_list)
228: if_send_notify(p, c, i);
229:
230: if (c & IF_CHANGE_UP)
231: WALK_LIST(a, i->addrs)
232: ifa_notify_change_(IF_CHANGE_UP, a);
233:
234: if (c & IF_CHANGE_UP)
235: neigh_if_up(i);
236:
237: if ((c & (IF_CHANGE_UP | IF_CHANGE_DOWN | IF_CHANGE_LINK)) == IF_CHANGE_LINK)
238: neigh_if_link(i);
239: }
240:
241: static uint
242: if_recalc_flags(struct iface *i UNUSED, uint flags)
243: {
244: if ((flags & IF_ADMIN_UP) &&
245: !(flags & (IF_SHUTDOWN | IF_TMP_DOWN)) &&
246: !(i->master_index && !i->master))
247: flags |= IF_UP;
248: else
249: flags &= ~IF_UP;
250:
251: return flags;
252: }
253:
254: static void
255: if_change_flags(struct iface *i, uint flags)
256: {
257: uint of = i->flags;
258: i->flags = if_recalc_flags(i, flags);
259:
260: if ((i->flags ^ of) & IF_UP)
261: if_notify_change((i->flags & IF_UP) ? IF_CHANGE_UP : IF_CHANGE_DOWN, i);
262: }
263:
264: /**
265: * if_delete - remove interface
266: * @old: interface
267: *
268: * This function is called by the low-level platform dependent code
269: * whenever it notices an interface disappears. It is just a shorthand
270: * for if_update().
271: */
272:
273: void
274: if_delete(struct iface *old)
275: {
276: struct iface f = {};
277: strncpy(f.name, old->name, sizeof(f.name)-1);
278: f.flags = IF_SHUTDOWN;
279: if_update(&f);
280: }
281:
282: /**
283: * if_update - update interface status
284: * @new: new interface status
285: *
286: * if_update() is called by the low-level platform dependent code
287: * whenever it notices an interface change.
288: *
289: * There exist two types of interface updates -- synchronous and asynchronous
290: * ones. In the synchronous case, the low-level code calls if_start_update(),
291: * scans all interfaces reported by the OS, uses if_update() and ifa_update()
292: * to pass them to the core and then it finishes the update sequence by
293: * calling if_end_update(). When working asynchronously, the sysdep code
294: * calls if_update() and ifa_update() whenever it notices a change.
295: *
296: * if_update() will automatically notify all other modules about the change.
297: */
298: struct iface *
299: if_update(struct iface *new)
300: {
301: struct iface *i;
302: unsigned c;
303:
304: WALK_LIST(i, iface_list)
305: if (!strcmp(new->name, i->name))
306: {
307: new->flags = if_recalc_flags(new, new->flags);
308: c = if_what_changed(i, new);
309: if (c & IF_CHANGE_TOO_MUCH) /* Changed a lot, convert it to down/up */
310: {
311: DBG("Interface %s changed too much -- forcing down/up transition\n", i->name);
312: if_change_flags(i, i->flags | IF_TMP_DOWN);
313: rem_node(&i->n);
314: new->addr4 = i->addr4;
315: new->addr6 = i->addr6;
316: new->llv6 = i->llv6;
317: new->sysdep = i->sysdep;
318: memcpy(&new->addrs, &i->addrs, sizeof(i->addrs));
319: memcpy(i, new, sizeof(*i));
320: i->flags &= ~IF_UP; /* IF_TMP_DOWN will be added later */
321: goto newif;
322: }
323:
324: if_copy(i, new);
325: if (c)
326: if_notify_change(c, i);
327:
328: i->flags |= IF_UPDATED;
329: return i;
330: }
331: i = mb_alloc(if_pool, sizeof(struct iface));
332: memcpy(i, new, sizeof(*i));
333: init_list(&i->addrs);
334: newif:
335: init_list(&i->neighbors);
336: i->flags |= IF_UPDATED | IF_TMP_DOWN; /* Tmp down as we don't have addresses yet */
337: add_tail(&iface_list, &i->n);
338: return i;
339: }
340:
341: void
342: if_start_update(void)
343: {
344: struct iface *i;
345: struct ifa *a;
346:
347: WALK_LIST(i, iface_list)
348: {
349: i->flags &= ~IF_UPDATED;
350: WALK_LIST(a, i->addrs)
351: a->flags &= ~IA_UPDATED;
352: }
353: }
354:
355: void
356: if_end_partial_update(struct iface *i)
357: {
358: if (i->flags & IF_NEEDS_RECALC)
359: if_recalc_preferred(i);
360:
361: if (i->flags & IF_TMP_DOWN)
362: if_change_flags(i, i->flags & ~IF_TMP_DOWN);
363: }
364:
365: void
366: if_end_update(void)
367: {
368: struct iface *i;
369: struct ifa *a, *b;
370:
371: WALK_LIST(i, iface_list)
372: {
373: if (!(i->flags & IF_UPDATED))
374: if_change_flags(i, (i->flags & ~IF_ADMIN_UP) | IF_SHUTDOWN);
375: else
376: {
377: WALK_LIST_DELSAFE(a, b, i->addrs)
378: if (!(a->flags & IA_UPDATED))
379: ifa_delete(a);
380: if_end_partial_update(i);
381: }
382: }
383: }
384:
385: void
386: if_flush_ifaces(struct proto *p)
387: {
388: if (p->debug & D_EVENTS)
389: log(L_TRACE "%s: Flushing interfaces", p->name);
390: if_start_update();
391: if_end_update();
392: }
393:
394: /**
395: * if_feed_baby - advertise interfaces to a new protocol
396: * @p: protocol to feed
397: *
398: * When a new protocol starts, this function sends it a series
399: * of notifications about all existing interfaces.
400: */
401: void
402: if_feed_baby(struct proto *p)
403: {
404: struct iface *i;
405: struct ifa *a;
406:
407: if (!p->if_notify && !p->ifa_notify) /* shortcut */
408: return;
409: DBG("Announcing interfaces to new protocol %s\n", p->name);
410: WALK_LIST(i, iface_list)
411: {
412: if_send_notify(p, IF_CHANGE_CREATE | ((i->flags & IF_UP) ? IF_CHANGE_UP : 0), i);
413: if (i->flags & IF_UP)
414: WALK_LIST(a, i->addrs)
415: ifa_send_notify(p, IF_CHANGE_CREATE | IF_CHANGE_UP, a);
416: }
417: }
418:
419: /**
420: * if_find_by_index - find interface by ifindex
421: * @idx: ifindex
422: *
423: * This function finds an &iface structure corresponding to an interface
424: * of the given index @idx. Returns a pointer to the structure or %NULL
425: * if no such structure exists.
426: */
427: struct iface *
428: if_find_by_index(unsigned idx)
429: {
430: struct iface *i;
431:
432: WALK_LIST(i, iface_list)
433: if (i->index == idx && !(i->flags & IF_SHUTDOWN))
434: return i;
435: return NULL;
436: }
437:
438: /**
439: * if_find_by_name - find interface by name
440: * @name: interface name
441: *
442: * This function finds an &iface structure corresponding to an interface
443: * of the given name @name. Returns a pointer to the structure or %NULL
444: * if no such structure exists.
445: */
446: struct iface *
447: if_find_by_name(char *name)
448: {
449: struct iface *i;
450:
451: WALK_LIST(i, iface_list)
452: if (!strcmp(i->name, name) && !(i->flags & IF_SHUTDOWN))
453: return i;
454: return NULL;
455: }
456:
457: struct iface *
458: if_get_by_name(char *name)
459: {
460: struct iface *i;
461:
462: WALK_LIST(i, iface_list)
463: if (!strcmp(i->name, name))
464: return i;
465:
466: /* No active iface, create a dummy */
467: i = mb_allocz(if_pool, sizeof(struct iface));
468: strncpy(i->name, name, sizeof(i->name)-1);
469: i->flags = IF_SHUTDOWN;
470: init_list(&i->addrs);
471: init_list(&i->neighbors);
472: add_tail(&iface_list, &i->n);
473: return i;
474: }
475:
476: static inline void
477: if_set_preferred(struct ifa **pos, struct ifa *new)
478: {
479: if (*pos)
480: (*pos)->flags &= ~IA_PRIMARY;
481: if (new)
482: new->flags |= IA_PRIMARY;
483:
484: *pos = new;
485: }
486:
487: static void
488: if_recalc_preferred(struct iface *i)
489: {
490: /*
491: * Preferred address selection priority:
492: * 1) Address configured in Device protocol
493: * 2) Sysdep IPv4 address (BSD)
494: * 3) Old preferred address
495: * 4) First address in list
496: */
497:
498: struct kif_iface_config *ic = kif_get_iface_config(i);
499: struct ifa *a4 = i->addr4, *a6 = i->addr6, *ll = i->llv6;
500: ip_addr pref_v4 = ic->pref_v4;
501: uint change = 0;
502:
503: if (kif_update_sysdep_addr(i))
504: change |= IF_CHANGE_SYSDEP;
505:
506: /* BSD sysdep address */
507: if (ipa_zero(pref_v4) && ip4_nonzero(i->sysdep))
508: pref_v4 = ipa_from_ip4(i->sysdep);
509:
510: struct ifa *a;
511: WALK_LIST(a, i->addrs)
512: {
513: /* Secondary address is never selected */
514: if (a->flags & IA_SECONDARY)
515: continue;
516:
517: if (ipa_is_ip4(a->ip)) {
518: if (!a4 || ipa_equal(a->ip, pref_v4))
519: a4 = a;
520: } else if (!ipa_is_link_local(a->ip)) {
521: if (!a6 || ipa_equal(a->ip, ic->pref_v6))
522: a6 = a;
523: } else {
524: if (!ll || ipa_equal(a->ip, ic->pref_ll))
525: ll = a;
526: }
527: }
528:
529: if ((a4 != i->addr4) || (i->flags & IF_LOST_ADDR4))
530: {
531: if_set_preferred(&i->addr4, a4);
532: change |= IF_CHANGE_ADDR4;
533: }
534:
535: if ((a6 != i->addr6) || (i->flags & IF_LOST_ADDR6))
536: {
537: if_set_preferred(&i->addr6, a6);
538: change |= IF_CHANGE_ADDR6;
539: }
540:
541: if ((ll != i->llv6) || (i->flags & IF_LOST_LLV6))
542: {
543: if_set_preferred(&i->llv6, ll);
544: change |= IF_CHANGE_LLV6;
545: }
546:
547: i->flags &= ~(IF_NEEDS_RECALC | IF_LOST_ADDR4 | IF_LOST_ADDR6 | IF_LOST_LLV6);
548:
549: if (change)
550: if_notify_change(change, i);
551: }
552:
553: void
554: if_recalc_all_preferred_addresses(void)
555: {
556: struct iface *i;
557:
558: WALK_LIST(i, iface_list)
559: {
560: if_recalc_preferred(i);
561:
562: if (i->flags & IF_TMP_DOWN)
563: if_change_flags(i, i->flags & ~IF_TMP_DOWN);
564: }
565: }
566:
567: static inline int
568: ifa_same(struct ifa *a, struct ifa *b)
569: {
570: return ipa_equal(a->ip, b->ip) && net_equal(&a->prefix, &b->prefix);
571: }
572:
573:
574: /**
575: * ifa_update - update interface address
576: * @a: new interface address
577: *
578: * This function adds address information to a network
579: * interface. It's called by the platform dependent code during
580: * the interface update process described under if_update().
581: */
582: struct ifa *
583: ifa_update(struct ifa *a)
584: {
585: struct iface *i = a->iface;
586: struct ifa *b;
587:
588: WALK_LIST(b, i->addrs)
589: if (ifa_same(b, a))
590: {
591: if (ipa_equal(b->brd, a->brd) &&
592: ipa_equal(b->opposite, a->opposite) &&
593: b->scope == a->scope &&
594: !((b->flags ^ a->flags) & IA_PEER))
595: {
596: b->flags |= IA_UPDATED;
597: return b;
598: }
599: ifa_delete(b);
600: break;
601: }
602:
603: if ((a->prefix.type == NET_IP4) && (i->flags & IF_BROADCAST) && ipa_zero(a->brd))
604: log(L_WARN "Missing broadcast address for interface %s", i->name);
605:
606: b = mb_alloc(if_pool, sizeof(struct ifa));
607: memcpy(b, a, sizeof(struct ifa));
608: add_tail(&i->addrs, &b->n);
609: b->flags |= IA_UPDATED;
610:
611: i->flags |= IF_NEEDS_RECALC;
612: if (i->flags & IF_UP)
613: ifa_notify_change(IF_CHANGE_CREATE | IF_CHANGE_UP, b);
614: return b;
615: }
616:
617: /**
618: * ifa_delete - remove interface address
619: * @a: interface address
620: *
621: * This function removes address information from a network
622: * interface. It's called by the platform dependent code during
623: * the interface update process described under if_update().
624: */
625: void
626: ifa_delete(struct ifa *a)
627: {
628: struct iface *i = a->iface;
629: struct ifa *b;
630:
631: WALK_LIST(b, i->addrs)
632: if (ifa_same(b, a))
633: {
634: rem_node(&b->n);
635:
636: if (b->flags & IA_PRIMARY)
637: {
638: /*
639: * We unlink deleted preferred address and mark for recalculation.
640: * FIXME: This could break if we make iface scan non-atomic, as
641: * protocols still could use the freed address until they get
642: * if_notify from preferred route recalculation. We should fix and
643: * simplify this in the future by having struct ifa refcounted
644: */
645: if (b == i->addr4) { i->addr4 = NULL; i->flags |= IF_LOST_ADDR4; }
646: if (b == i->addr6) { i->addr6 = NULL; i->flags |= IF_LOST_ADDR6; }
647: if (b == i->llv6) { i->llv6 = NULL; i->flags |= IF_LOST_LLV6; }
648: i->flags |= IF_NEEDS_RECALC;
649: }
650:
651: if (i->flags & IF_UP)
652: ifa_notify_change(IF_CHANGE_DOWN, b);
653:
654: mb_free(b);
655: return;
656: }
657: }
658:
659: u32
660: if_choose_router_id(struct iface_patt *mask, u32 old_id)
661: {
662: struct iface *i;
663: struct ifa *a, *b;
664:
665: b = NULL;
666: WALK_LIST(i, iface_list)
667: {
668: if (!(i->flags & IF_ADMIN_UP) ||
669: (i->flags & IF_SHUTDOWN))
670: continue;
671:
672: WALK_LIST(a, i->addrs)
673: {
674: if (a->prefix.type != NET_IP4)
675: continue;
676:
677: if (a->flags & IA_SECONDARY)
678: continue;
679:
680: if (a->scope <= SCOPE_LINK)
681: continue;
682:
683: /* Check pattern if specified */
684: if (mask && !iface_patt_match(mask, i, a))
685: continue;
686:
687: /* No pattern or pattern matched */
688: if (!b || ipa_to_u32(a->ip) < ipa_to_u32(b->ip))
689: b = a;
690: }
691: }
692:
693: if (!b)
694: return 0;
695:
696: u32 id = ipa_to_u32(b->ip);
697: if (id != old_id)
698: log(L_INFO "Chosen router ID %R according to interface %s", id, b->iface->name);
699:
700: return id;
701: }
702:
703: /**
704: * if_init - initialize interface module
705: *
706: * This function is called during BIRD startup to initialize
707: * all data structures of the interface module.
708: */
709: void
710: if_init(void)
711: {
712: if_pool = rp_new(&root_pool, "Interfaces");
713: init_list(&iface_list);
714: neigh_init(if_pool);
715: }
716:
717: /*
718: * Interface Pattern Lists
719: */
720:
721: int
722: iface_patt_match(struct iface_patt *ifp, struct iface *i, struct ifa *a)
723: {
724: struct iface_patt_node *p;
725:
726: WALK_LIST(p, ifp->ipn_list)
727: {
728: char *t = p->pattern;
729: int pos = p->positive;
730:
731: if (t)
732: {
733: if (*t == '-')
734: {
735: t++;
736: pos = !pos;
737: }
738:
739: if (!patmatch(t, i->name))
740: continue;
741: }
742:
743: if (p->prefix.pxlen == 0)
744: return pos;
745:
746: if (!a)
747: continue;
748:
749: if (ipa_in_netX(a->ip, &p->prefix))
750: return pos;
751:
752: if ((a->flags & IA_PEER) &&
753: ipa_in_netX(a->opposite, &p->prefix))
754: return pos;
755:
756: continue;
757: }
758:
759: return 0;
760: }
761:
762: struct iface_patt *
763: iface_patt_find(list *l, struct iface *i, struct ifa *a)
764: {
765: struct iface_patt *p;
766:
767: WALK_LIST(p, *l)
768: if (iface_patt_match(p, i, a))
769: return p;
770:
771: return NULL;
772: }
773:
774: static int
775: iface_plists_equal(struct iface_patt *pa, struct iface_patt *pb)
776: {
777: struct iface_patt_node *x, *y;
778:
779: x = HEAD(pa->ipn_list);
780: y = HEAD(pb->ipn_list);
781: while (x->n.next && y->n.next)
782: {
783: if ((x->positive != y->positive) ||
784: (!x->pattern && y->pattern) || /* This nasty lines where written by me... :-( Feela */
785: (!y->pattern && x->pattern) ||
786: ((x->pattern != y->pattern) && strcmp(x->pattern, y->pattern)) ||
787: !net_equal(&x->prefix, &y->prefix))
788: return 0;
789: x = (void *) x->n.next;
790: y = (void *) y->n.next;
791: }
792: return (!x->n.next && !y->n.next);
793: }
794:
795: int
796: iface_patts_equal(list *a, list *b, int (*comp)(struct iface_patt *, struct iface_patt *))
797: {
798: struct iface_patt *x, *y;
799:
800: x = HEAD(*a);
801: y = HEAD(*b);
802: while (x->n.next && y->n.next)
803: {
804: if (!iface_plists_equal(x, y) ||
805: (comp && !comp(x, y)))
806: return 0;
807: x = (void *) x->n.next;
808: y = (void *) y->n.next;
809: }
810: return (!x->n.next && !y->n.next);
811: }
812:
813: /*
814: * CLI commands.
815: */
816:
817: static void
818: if_show_addr(struct ifa *a)
819: {
820: byte *flg, opp[IPA_MAX_TEXT_LENGTH + 16];
821:
822: flg = (a->flags & IA_PRIMARY) ? "Preferred, " : (a->flags & IA_SECONDARY) ? "Secondary, " : "";
823:
824: if (ipa_nonzero(a->opposite))
825: bsprintf(opp, "opposite %I, ", a->opposite);
826: else
827: opp[0] = 0;
828:
829: cli_msg(-1003, "\t%I/%d (%s%sscope %s)",
830: a->ip, a->prefix.pxlen, flg, opp, ip_scope_text(a->scope));
831: }
832:
833: void
834: if_show(void)
835: {
836: struct iface *i;
837: struct ifa *a;
838: char *type;
839:
840: WALK_LIST(i, iface_list)
841: {
842: if (i->flags & IF_SHUTDOWN)
843: continue;
844:
845: char mbuf[16 + sizeof(i->name)] = {};
846: if (i->master)
847: bsprintf(mbuf, " master=%s", i->master->name);
848: else if (i->master_index)
849: bsprintf(mbuf, " master=#%u", i->master_index);
850:
851: cli_msg(-1001, "%s %s (index=%d%s)", i->name, (i->flags & IF_UP) ? "up" : "down", i->index, mbuf);
852: if (!(i->flags & IF_MULTIACCESS))
853: type = "PtP";
854: else
855: type = "MultiAccess";
856: cli_msg(-1004, "\t%s%s%s Admin%s Link%s%s%s MTU=%d",
857: type,
858: (i->flags & IF_BROADCAST) ? " Broadcast" : "",
859: (i->flags & IF_MULTICAST) ? " Multicast" : "",
860: (i->flags & IF_ADMIN_UP) ? "Up" : "Down",
861: (i->flags & IF_LINK_UP) ? "Up" : "Down",
862: (i->flags & IF_LOOPBACK) ? " Loopback" : "",
863: (i->flags & IF_IGNORE) ? " Ignored" : "",
864: i->mtu);
865:
866: WALK_LIST(a, i->addrs)
867: if (a->prefix.type == NET_IP4)
868: if_show_addr(a);
869:
870: WALK_LIST(a, i->addrs)
871: if (a->prefix.type == NET_IP6)
872: if_show_addr(a);
873: }
874: cli_msg(0, "");
875: }
876:
877: void
878: if_show_summary(void)
879: {
880: struct iface *i;
881:
882: cli_msg(-2005, "%-10s %-6s %-18s %s", "Interface", "State", "IPv4 address", "IPv6 address");
883: WALK_LIST(i, iface_list)
884: {
885: byte a4[IPA_MAX_TEXT_LENGTH + 17];
886: byte a6[IPA_MAX_TEXT_LENGTH + 17];
887:
888: if (i->flags & IF_SHUTDOWN)
889: continue;
890:
891: if (i->addr4)
892: bsprintf(a4, "%I/%d", i->addr4->ip, i->addr4->prefix.pxlen);
893: else
894: a4[0] = 0;
895:
896: if (i->addr6)
897: bsprintf(a6, "%I/%d", i->addr6->ip, i->addr6->prefix.pxlen);
898: else
899: a6[0] = 0;
900:
901: cli_msg(-1005, "%-10s %-6s %-18s %s",
902: i->name, (i->flags & IF_UP) ? "up" : "down", a4, a6);
903: }
904: cli_msg(0, "");
905: }
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