source: MondoRescue/branches/3.3/mindi-busybox/networking/libiproute/ipaddress.c@ 3667

Last change on this file since 3667 was 3621, checked in by Bruno Cornec, 8 years ago

New 3?3 banch for incorporation of latest busybox 1.25. Changing minor version to handle potential incompatibilities.
File size: 18.8 KB
RevLine 
[1765]1/* vi: set sw=4 ts=4: */
[821]2/*
[2725]3 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
[821]4 *
[2725]5 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
[821]6 *
7 * Changes:
[2725]8 * Laszlo Valko <valko@linux.karinthy.hu> 990223: address label must be zero terminated
[821]9 */
10
11#include <fnmatch.h>
12#include <net/if.h>
13#include <net/if_arp.h>
14
[1765]15#include "ip_common.h" /* #include "libbb.h" is inside */
[3621]16#include "common_bufsiz.h"
[821]17#include "rt_names.h"
18#include "utils.h"
19
[2725]20#ifndef IFF_LOWER_UP
21/* from linux/if.h */
22#define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
23#endif
[821]24
[2725]25struct filter_t {
26 char *label;
27 char *flushb;
28 struct rtnl_handle *rth;
[821]29 int scope, scopemask;
30 int flags, flagmask;
31 int flushp;
32 int flushe;
[2725]33 int ifindex;
34 family_t family;
35 smallint showqueue;
36 smallint oneline;
37 smallint up;
38 smallint flushed;
39 inet_prefix pfx;
40} FIX_ALIASING;
41typedef struct filter_t filter_t;
[821]42
[3621]43#define G_filter (*(filter_t*)bb_common_bufsiz1)
44#define INIT_G() do { setup_common_bufsiz(); } while (0)
[1765]45
[2725]46static void print_link_flags(unsigned flags, unsigned mdown)
[821]47{
[2725]48 static const int flag_masks[] = {
49 IFF_LOOPBACK, IFF_BROADCAST, IFF_POINTOPOINT,
50 IFF_MULTICAST, IFF_NOARP, IFF_UP, IFF_LOWER_UP };
51 static const char flag_labels[] ALIGN1 =
52 "LOOPBACK\0""BROADCAST\0""POINTOPOINT\0"
53 "MULTICAST\0""NOARP\0""UP\0""LOWER_UP\0";
54
55 bb_putchar('<');
56 if (flags & IFF_UP && !(flags & IFF_RUNNING))
57 printf("NO-CARRIER,");
[821]58 flags &= ~IFF_RUNNING;
59#if 0
60 _PF(ALLMULTI);
61 _PF(PROMISC);
62 _PF(MASTER);
63 _PF(SLAVE);
64 _PF(DEBUG);
65 _PF(DYNAMIC);
66 _PF(AUTOMEDIA);
67 _PF(PORTSEL);
68 _PF(NOTRAILERS);
69#endif
[2725]70 flags = print_flags_separated(flag_masks, flag_labels, flags, ",");
[821]71 if (flags)
[2725]72 printf("%x", flags);
[821]73 if (mdown)
[2725]74 printf(",M-DOWN");
75 printf("> ");
[821]76}
77
78static void print_queuelen(char *name)
79{
80 struct ifreq ifr;
81 int s;
82
83 s = socket(AF_INET, SOCK_STREAM, 0);
84 if (s < 0)
85 return;
86
87 memset(&ifr, 0, sizeof(ifr));
[2725]88 strncpy_IFNAMSIZ(ifr.ifr_name, name);
[1765]89 if (ioctl_or_warn(s, SIOCGIFTXQLEN, &ifr) < 0) {
[821]90 close(s);
91 return;
92 }
93 close(s);
94
95 if (ifr.ifr_qlen)
96 printf("qlen %d", ifr.ifr_qlen);
97}
98
[2725]99static NOINLINE int print_linkinfo(const struct nlmsghdr *n)
[821]100{
101 struct ifinfomsg *ifi = NLMSG_DATA(n);
[2725]102 struct rtattr *tb[IFLA_MAX+1];
[821]103 int len = n->nlmsg_len;
104
105 if (n->nlmsg_type != RTM_NEWLINK && n->nlmsg_type != RTM_DELLINK)
106 return 0;
107
108 len -= NLMSG_LENGTH(sizeof(*ifi));
109 if (len < 0)
110 return -1;
111
[2725]112 if (G_filter.ifindex && ifi->ifi_index != G_filter.ifindex)
[821]113 return 0;
[2725]114 if (G_filter.up && !(ifi->ifi_flags & IFF_UP))
[821]115 return 0;
116
117 memset(tb, 0, sizeof(tb));
118 parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
119 if (tb[IFLA_IFNAME] == NULL) {
120 bb_error_msg("nil ifname");
121 return -1;
122 }
[2725]123 if (G_filter.label
124 && (!G_filter.family || G_filter.family == AF_PACKET)
125 && fnmatch(G_filter.label, RTA_DATA(tb[IFLA_IFNAME]), 0)
[1765]126 ) {
[821]127 return 0;
[1765]128 }
[821]129
130 if (n->nlmsg_type == RTM_DELLINK)
[2725]131 printf("Deleted ");
[821]132
[2725]133 printf("%d: %s", ifi->ifi_index,
134 /*tb[IFLA_IFNAME] ? (char*)RTA_DATA(tb[IFLA_IFNAME]) : "<nil>" - we checked tb[IFLA_IFNAME] above*/
135 (char*)RTA_DATA(tb[IFLA_IFNAME])
136 );
[821]137
[2725]138 {
139 unsigned m_flag = 0;
140 if (tb[IFLA_LINK]) {
141 int iflink = *(int*)RTA_DATA(tb[IFLA_LINK]);
142 if (iflink == 0)
143 printf("@NONE: ");
144 else {
[3621]145 printf("@%s: ", ll_index_to_name(iflink));
[2725]146 m_flag = ll_index_to_flags(iflink);
147 m_flag = !(m_flag & IFF_UP);
148 }
149 } else {
150 printf(": ");
[821]151 }
[2725]152 print_link_flags(ifi->ifi_flags, m_flag);
[821]153 }
154
155 if (tb[IFLA_MTU])
[2725]156 printf("mtu %u ", *(int*)RTA_DATA(tb[IFLA_MTU]));
[821]157 if (tb[IFLA_QDISC])
[2725]158 printf("qdisc %s ", (char*)RTA_DATA(tb[IFLA_QDISC]));
[821]159#ifdef IFLA_MASTER
160 if (tb[IFLA_MASTER]) {
[3621]161 printf("master %s ", ll_index_to_name(*(int*)RTA_DATA(tb[IFLA_MASTER])));
[821]162 }
163#endif
[3232]164/* IFLA_OPERSTATE was added to kernel with the same commit as IFF_DORMANT */
165#ifdef IFF_DORMANT
[2725]166 if (tb[IFLA_OPERSTATE]) {
167 static const char operstate_labels[] ALIGN1 =
168 "UNKNOWN\0""NOTPRESENT\0""DOWN\0""LOWERLAYERDOWN\0"
169 "TESTING\0""DORMANT\0""UP\0";
170 printf("state %s ", nth_string(operstate_labels,
171 *(uint8_t *)RTA_DATA(tb[IFLA_OPERSTATE])));
172 }
[3232]173#endif
[2725]174 if (G_filter.showqueue)
[821]175 print_queuelen((char*)RTA_DATA(tb[IFLA_IFNAME]));
176
[2725]177 if (!G_filter.family || G_filter.family == AF_PACKET) {
[821]178 SPRINT_BUF(b1);
[2725]179 printf("%c link/%s ", _SL_, ll_type_n2a(ifi->ifi_type, b1));
[821]180
181 if (tb[IFLA_ADDRESS]) {
[2725]182 fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
[821]183 RTA_PAYLOAD(tb[IFLA_ADDRESS]),
184 ifi->ifi_type,
[2725]185 b1, sizeof(b1)), stdout);
[821]186 }
187 if (tb[IFLA_BROADCAST]) {
[2725]188 if (ifi->ifi_flags & IFF_POINTOPOINT)
189 printf(" peer ");
[821]190 else
[2725]191 printf(" brd ");
192 fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_BROADCAST]),
[821]193 RTA_PAYLOAD(tb[IFLA_BROADCAST]),
194 ifi->ifi_type,
[2725]195 b1, sizeof(b1)), stdout);
[821]196 }
197 }
[2725]198 bb_putchar('\n');
199 /*fflush_all();*/
[821]200 return 0;
201}
202
203static int flush_update(void)
204{
[2725]205 if (rtnl_send(G_filter.rth, G_filter.flushb, G_filter.flushp) < 0) {
206 bb_perror_msg("can't send flush request");
[821]207 return -1;
208 }
[2725]209 G_filter.flushp = 0;
[821]210 return 0;
211}
212
[2725]213static int FAST_FUNC print_addrinfo(const struct sockaddr_nl *who UNUSED_PARAM,
214 struct nlmsghdr *n, void *arg UNUSED_PARAM)
[821]215{
216 struct ifaddrmsg *ifa = NLMSG_DATA(n);
217 int len = n->nlmsg_len;
[3621]218 struct rtattr *rta_tb[IFA_MAX+1];
[821]219
220 if (n->nlmsg_type != RTM_NEWADDR && n->nlmsg_type != RTM_DELADDR)
221 return 0;
222 len -= NLMSG_LENGTH(sizeof(*ifa));
223 if (len < 0) {
224 bb_error_msg("wrong nlmsg len %d", len);
225 return -1;
226 }
227
[2725]228 if (G_filter.flushb && n->nlmsg_type != RTM_NEWADDR)
[821]229 return 0;
230
231 memset(rta_tb, 0, sizeof(rta_tb));
232 parse_rtattr(rta_tb, IFA_MAX, IFA_RTA(ifa), n->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa)));
233
234 if (!rta_tb[IFA_LOCAL])
235 rta_tb[IFA_LOCAL] = rta_tb[IFA_ADDRESS];
236 if (!rta_tb[IFA_ADDRESS])
237 rta_tb[IFA_ADDRESS] = rta_tb[IFA_LOCAL];
238
[2725]239 if (G_filter.ifindex && G_filter.ifindex != ifa->ifa_index)
[821]240 return 0;
[2725]241 if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
[821]242 return 0;
[2725]243 if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
[821]244 return 0;
[2725]245 if (G_filter.label) {
[821]246 const char *label;
247 if (rta_tb[IFA_LABEL])
248 label = RTA_DATA(rta_tb[IFA_LABEL]);
249 else
[3621]250 label = ll_index_to_name(ifa->ifa_index);
[2725]251 if (fnmatch(G_filter.label, label, 0) != 0)
[821]252 return 0;
253 }
[2725]254 if (G_filter.pfx.family) {
[821]255 if (rta_tb[IFA_LOCAL]) {
256 inet_prefix dst;
257 memset(&dst, 0, sizeof(dst));
258 dst.family = ifa->ifa_family;
259 memcpy(&dst.data, RTA_DATA(rta_tb[IFA_LOCAL]), RTA_PAYLOAD(rta_tb[IFA_LOCAL]));
[2725]260 if (inet_addr_match(&dst, &G_filter.pfx, G_filter.pfx.bitlen))
[821]261 return 0;
262 }
263 }
264
[2725]265 if (G_filter.flushb) {
[821]266 struct nlmsghdr *fn;
[2725]267 if (NLMSG_ALIGN(G_filter.flushp) + n->nlmsg_len > G_filter.flushe) {
[821]268 if (flush_update())
269 return -1;
270 }
[2725]271 fn = (struct nlmsghdr*)(G_filter.flushb + NLMSG_ALIGN(G_filter.flushp));
[821]272 memcpy(fn, n, n->nlmsg_len);
273 fn->nlmsg_type = RTM_DELADDR;
274 fn->nlmsg_flags = NLM_F_REQUEST;
[2725]275 fn->nlmsg_seq = ++G_filter.rth->seq;
276 G_filter.flushp = (((char*)fn) + n->nlmsg_len) - G_filter.flushb;
277 G_filter.flushed = 1;
[821]278 return 0;
279 }
280
281 if (n->nlmsg_type == RTM_DELADDR)
[2725]282 printf("Deleted ");
[821]283
[2725]284 if (G_filter.oneline)
285 printf("%u: %s", ifa->ifa_index, ll_index_to_name(ifa->ifa_index));
[821]286 if (ifa->ifa_family == AF_INET)
[2725]287 printf(" inet ");
[821]288 else if (ifa->ifa_family == AF_INET6)
[2725]289 printf(" inet6 ");
[821]290 else
[2725]291 printf(" family %d ", ifa->ifa_family);
[821]292
293 if (rta_tb[IFA_LOCAL]) {
[3621]294 fputs(rt_addr_n2a(ifa->ifa_family, RTA_DATA(rta_tb[IFA_LOCAL])),
295 stdout
296 );
[821]297
[2725]298 if (rta_tb[IFA_ADDRESS] == NULL
299 || memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0
300 ) {
301 printf("/%d ", ifa->ifa_prefixlen);
[821]302 } else {
[2725]303 printf(" peer %s/%d ",
[3621]304 rt_addr_n2a(ifa->ifa_family, RTA_DATA(rta_tb[IFA_ADDRESS])),
305 ifa->ifa_prefixlen
306 );
[821]307 }
308 }
309
310 if (rta_tb[IFA_BROADCAST]) {
[2725]311 printf("brd %s ",
[821]312 rt_addr_n2a(ifa->ifa_family,
[3621]313 RTA_DATA(rta_tb[IFA_BROADCAST]))
[3232]314 );
[821]315 }
316 if (rta_tb[IFA_ANYCAST]) {
[2725]317 printf("any %s ",
[821]318 rt_addr_n2a(ifa->ifa_family,
[3621]319 RTA_DATA(rta_tb[IFA_ANYCAST]))
[3232]320 );
[821]321 }
[3621]322 printf("scope %s ", rtnl_rtscope_n2a(ifa->ifa_scope));
[2725]323 if (ifa->ifa_flags & IFA_F_SECONDARY) {
[821]324 ifa->ifa_flags &= ~IFA_F_SECONDARY;
[2725]325 printf("secondary ");
[821]326 }
[2725]327 if (ifa->ifa_flags & IFA_F_TENTATIVE) {
[821]328 ifa->ifa_flags &= ~IFA_F_TENTATIVE;
[2725]329 printf("tentative ");
[821]330 }
[2725]331 if (ifa->ifa_flags & IFA_F_DEPRECATED) {
[821]332 ifa->ifa_flags &= ~IFA_F_DEPRECATED;
[2725]333 printf("deprecated ");
[821]334 }
[2725]335 if (!(ifa->ifa_flags & IFA_F_PERMANENT)) {
336 printf("dynamic ");
[821]337 } else
338 ifa->ifa_flags &= ~IFA_F_PERMANENT;
339 if (ifa->ifa_flags)
[2725]340 printf("flags %02x ", ifa->ifa_flags);
[821]341 if (rta_tb[IFA_LABEL])
[2725]342 fputs((char*)RTA_DATA(rta_tb[IFA_LABEL]), stdout);
[821]343 if (rta_tb[IFA_CACHEINFO]) {
344 struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]);
345 char buf[128];
[2725]346 bb_putchar(_SL_);
[821]347 if (ci->ifa_valid == 0xFFFFFFFFU)
348 sprintf(buf, "valid_lft forever");
349 else
350 sprintf(buf, "valid_lft %dsec", ci->ifa_valid);
351 if (ci->ifa_prefered == 0xFFFFFFFFU)
352 sprintf(buf+strlen(buf), " preferred_lft forever");
353 else
354 sprintf(buf+strlen(buf), " preferred_lft %dsec", ci->ifa_prefered);
[2725]355 printf(" %s", buf);
[821]356 }
[2725]357 bb_putchar('\n');
358 /*fflush_all();*/
[821]359 return 0;
360}
361
362
[2725]363struct nlmsg_list {
[821]364 struct nlmsg_list *next;
[2725]365 struct nlmsghdr h;
[821]366};
367
[2725]368static int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo)
[821]369{
[1765]370 for (; ainfo; ainfo = ainfo->next) {
[821]371 struct nlmsghdr *n = &ainfo->h;
372 struct ifaddrmsg *ifa = NLMSG_DATA(n);
373
374 if (n->nlmsg_type != RTM_NEWADDR)
375 continue;
376 if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa)))
377 return -1;
[2725]378 if (ifa->ifa_index != ifindex
379 || (G_filter.family && G_filter.family != ifa->ifa_family)
380 ) {
[821]381 continue;
[2725]382 }
383 print_addrinfo(NULL, n, NULL);
[821]384 }
385 return 0;
386}
387
388
[2725]389static int FAST_FUNC store_nlmsg(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
[821]390{
391 struct nlmsg_list **linfo = (struct nlmsg_list**)arg;
392 struct nlmsg_list *h;
393 struct nlmsg_list **lp;
394
[2725]395 h = xzalloc(n->nlmsg_len + sizeof(void*));
[821]396
397 memcpy(&h->h, n, n->nlmsg_len);
[2725]398 /*h->next = NULL; - xzalloc did it */
[821]399
[2725]400 for (lp = linfo; *lp; lp = &(*lp)->next)
401 continue;
[821]402 *lp = h;
403
404 ll_remember_index(who, n, NULL);
405 return 0;
406}
407
408static void ipaddr_reset_filter(int _oneline)
409{
[2725]410 memset(&G_filter, 0, sizeof(G_filter));
411 G_filter.oneline = _oneline;
[821]412}
413
[1765]414/* Return value becomes exitcode. It's okay to not return at all */
[2725]415int FAST_FUNC ipaddr_list_or_flush(char **argv, int flush)
[821]416{
[1765]417 static const char option[] ALIGN1 = "to\0""scope\0""up\0""label\0""dev\0";
[821]418
419 struct nlmsg_list *linfo = NULL;
420 struct nlmsg_list *ainfo = NULL;
421 struct nlmsg_list *l;
422 struct rtnl_handle rth;
423 char *filter_dev = NULL;
424 int no_link = 0;
425
426 ipaddr_reset_filter(oneline);
[2725]427 G_filter.showqueue = 1;
[821]428
[2725]429 if (G_filter.family == AF_UNSPEC)
430 G_filter.family = preferred_family;
[821]431
432 if (flush) {
[2725]433 if (!*argv) {
[1765]434 bb_error_msg_and_die(bb_msg_requires_arg, "flush");
[821]435 }
[2725]436 if (G_filter.family == AF_PACKET) {
437 bb_error_msg_and_die("can't flush link addresses");
[821]438 }
439 }
440
[2725]441 while (*argv) {
442 const smalluint key = index_in_strings(option, *argv);
443 if (key == 0) { /* to */
444 NEXT_ARG();
445 get_prefix(&G_filter.pfx, *argv, G_filter.family);
446 if (G_filter.family == AF_UNSPEC) {
447 G_filter.family = G_filter.pfx.family;
448 }
449 } else if (key == 1) { /* scope */
450 uint32_t scope = 0;
451 NEXT_ARG();
452 G_filter.scopemask = -1;
453 if (rtnl_rtscope_a2n(&scope, *argv)) {
454 if (strcmp(*argv, "all") != 0) {
[3621]455 invarg_1_to_2(*argv, "scope");
[821]456 }
[2725]457 scope = RT_SCOPE_NOWHERE;
458 G_filter.scopemask = 0;
[821]459 }
[2725]460 G_filter.scope = scope;
461 } else if (key == 2) { /* up */
462 G_filter.up = 1;
463 } else if (key == 3) { /* label */
464 NEXT_ARG();
465 G_filter.label = *argv;
466 } else {
467 if (key == 4) /* dev */
[821]468 NEXT_ARG();
[2725]469 if (filter_dev)
470 duparg2("dev", *argv);
471 filter_dev = *argv;
[821]472 }
473 argv++;
474 }
475
[1765]476 xrtnl_open(&rth);
[821]477
[1765]478 xrtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK);
479 xrtnl_dump_filter(&rth, store_nlmsg, &linfo);
[821]480
481 if (filter_dev) {
[2725]482 G_filter.ifindex = xll_name_to_index(filter_dev);
[821]483 }
484
485 if (flush) {
486 char flushb[4096-512];
487
[2725]488 G_filter.flushb = flushb;
489 G_filter.flushp = 0;
490 G_filter.flushe = sizeof(flushb);
491 G_filter.rth = &rth;
[821]492
493 for (;;) {
[2725]494 xrtnl_wilddump_request(&rth, G_filter.family, RTM_GETADDR);
495 G_filter.flushed = 0;
496 xrtnl_dump_filter(&rth, print_addrinfo, NULL);
497 if (G_filter.flushed == 0) {
[821]498 return 0;
499 }
[2725]500 if (flush_update() < 0) {
[1765]501 return 1;
[2725]502 }
[821]503 }
504 }
505
[2725]506 if (G_filter.family != AF_PACKET) {
507 xrtnl_wilddump_request(&rth, G_filter.family, RTM_GETADDR);
[1765]508 xrtnl_dump_filter(&rth, store_nlmsg, &ainfo);
[821]509 }
510
511
[2725]512 if (G_filter.family && G_filter.family != AF_PACKET) {
[821]513 struct nlmsg_list **lp;
[2725]514 lp = &linfo;
[821]515
[2725]516 if (G_filter.oneline)
[821]517 no_link = 1;
518
[2725]519 while ((l = *lp) != NULL) {
[821]520 int ok = 0;
521 struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
522 struct nlmsg_list *a;
523
[2725]524 for (a = ainfo; a; a = a->next) {
[821]525 struct nlmsghdr *n = &a->h;
526 struct ifaddrmsg *ifa = NLMSG_DATA(n);
527
[2725]528 if (ifa->ifa_index != ifi->ifi_index
529 || (G_filter.family && G_filter.family != ifa->ifa_family)
530 ) {
[821]531 continue;
[2725]532 }
533 if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
[821]534 continue;
[2725]535 if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
[821]536 continue;
[2725]537 if (G_filter.pfx.family || G_filter.label) {
[821]538 struct rtattr *tb[IFA_MAX+1];
539 memset(tb, 0, sizeof(tb));
540 parse_rtattr(tb, IFA_MAX, IFA_RTA(ifa), IFA_PAYLOAD(n));
541 if (!tb[IFA_LOCAL])
542 tb[IFA_LOCAL] = tb[IFA_ADDRESS];
543
[2725]544 if (G_filter.pfx.family && tb[IFA_LOCAL]) {
[821]545 inet_prefix dst;
546 memset(&dst, 0, sizeof(dst));
547 dst.family = ifa->ifa_family;
548 memcpy(&dst.data, RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_LOCAL]));
[2725]549 if (inet_addr_match(&dst, &G_filter.pfx, G_filter.pfx.bitlen))
[821]550 continue;
551 }
[2725]552 if (G_filter.label) {
[821]553 const char *label;
554 if (tb[IFA_LABEL])
555 label = RTA_DATA(tb[IFA_LABEL]);
556 else
[3621]557 label = ll_index_to_name(ifa->ifa_index);
[2725]558 if (fnmatch(G_filter.label, label, 0) != 0)
[821]559 continue;
560 }
561 }
562
563 ok = 1;
564 break;
565 }
566 if (!ok)
567 *lp = l->next;
568 else
569 lp = &l->next;
570 }
571 }
572
[1765]573 for (l = linfo; l; l = l->next) {
[2725]574 if (no_link || print_linkinfo(&l->h) == 0) {
[821]575 struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
[2725]576 if (G_filter.family != AF_PACKET)
577 print_selected_addrinfo(ifi->ifi_index, ainfo);
[821]578 }
579 }
580
[1765]581 return 0;
[821]582}
583
584static int default_scope(inet_prefix *lcl)
585{
586 if (lcl->family == AF_INET) {
[1765]587 if (lcl->bytelen >= 1 && *(uint8_t*)&lcl->data == 127)
[821]588 return RT_SCOPE_HOST;
589 }
590 return 0;
591}
592
[1765]593/* Return value becomes exitcode. It's okay to not return at all */
[3621]594static int ipaddr_modify(int cmd, int flags, char **argv)
[821]595{
[1765]596 static const char option[] ALIGN1 =
597 "peer\0""remote\0""broadcast\0""brd\0"
598 "anycast\0""scope\0""dev\0""label\0""local\0";
[821]599 struct rtnl_handle rth;
600 struct {
[1765]601 struct nlmsghdr n;
602 struct ifaddrmsg ifa;
603 char buf[256];
[821]604 } req;
[1765]605 char *d = NULL;
606 char *l = NULL;
[821]607 inet_prefix lcl;
608 inet_prefix peer;
609 int local_len = 0;
610 int peer_len = 0;
611 int brd_len = 0;
612 int any_len = 0;
[1765]613 bool scoped = 0;
[821]614
615 memset(&req, 0, sizeof(req));
616
617 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
[3621]618 req.n.nlmsg_flags = NLM_F_REQUEST | flags;
[821]619 req.n.nlmsg_type = cmd;
620 req.ifa.ifa_family = preferred_family;
621
[2725]622 while (*argv) {
[3621]623 unsigned arg = index_in_strings(option, *argv);
624 /* if search fails, "local" is assumed */
625 if ((int)arg >= 0)
[2725]626 NEXT_ARG();
[821]627
[3621]628 if (arg <= 1) { /* peer, remote */
[2725]629 if (peer_len) {
630 duparg("peer", *argv);
[821]631 }
[2725]632 get_prefix(&peer, *argv, req.ifa.ifa_family);
633 peer_len = peer.bytelen;
634 if (req.ifa.ifa_family == AF_UNSPEC) {
635 req.ifa.ifa_family = peer.family;
636 }
637 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen);
638 req.ifa.ifa_prefixlen = peer.bitlen;
639 } else if (arg <= 3) { /* broadcast, brd */
640 inet_prefix addr;
641 if (brd_len) {
642 duparg("broadcast", *argv);
643 }
644 if (LONE_CHAR(*argv, '+')) {
645 brd_len = -1;
646 } else if (LONE_DASH(*argv)) {
647 brd_len = -2;
648 } else {
[821]649 get_addr(&addr, *argv, req.ifa.ifa_family);
[2725]650 if (req.ifa.ifa_family == AF_UNSPEC)
[821]651 req.ifa.ifa_family = addr.family;
[2725]652 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen);
653 brd_len = addr.bytelen;
[821]654 }
[2725]655 } else if (arg == 4) { /* anycast */
656 inet_prefix addr;
657 if (any_len) {
658 duparg("anycast", *argv);
659 }
660 get_addr(&addr, *argv, req.ifa.ifa_family);
661 if (req.ifa.ifa_family == AF_UNSPEC) {
662 req.ifa.ifa_family = addr.family;
663 }
664 addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
665 any_len = addr.bytelen;
666 } else if (arg == 5) { /* scope */
667 uint32_t scope = 0;
668 if (rtnl_rtscope_a2n(&scope, *argv)) {
[3621]669 invarg_1_to_2(*argv, "scope");
[2725]670 }
671 req.ifa.ifa_scope = scope;
672 scoped = 1;
673 } else if (arg == 6) { /* dev */
674 d = *argv;
675 } else if (arg == 7) { /* label */
676 l = *argv;
677 addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l) + 1);
678 } else {
[3621]679 /* local (specified or assumed) */
[2725]680 if (local_len) {
681 duparg2("local", *argv);
[821]682 }
[2725]683 get_prefix(&lcl, *argv, req.ifa.ifa_family);
684 if (req.ifa.ifa_family == AF_UNSPEC) {
685 req.ifa.ifa_family = lcl.family;
686 }
687 addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen);
688 local_len = lcl.bytelen;
[821]689 }
690 argv++;
691 }
692
[2725]693 if (!d) {
694 /* There was no "dev IFACE", but we need that */
695 bb_error_msg_and_die("need \"dev IFACE\"");
[821]696 }
[3621]697 if (l && !is_prefixed_with(l, d)) {
[821]698 bb_error_msg_and_die("\"dev\" (%s) must match \"label\" (%s)", d, l);
699 }
700
701 if (peer_len == 0 && local_len && cmd != RTM_DELADDR) {
702 peer = lcl;
703 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen);
704 }
705 if (req.ifa.ifa_prefixlen == 0)
706 req.ifa.ifa_prefixlen = lcl.bitlen;
707
708 if (brd_len < 0 && cmd != RTM_DELADDR) {
709 inet_prefix brd;
710 int i;
711 if (req.ifa.ifa_family != AF_INET) {
[1765]712 bb_error_msg_and_die("broadcast can be set only for IPv4 addresses");
[821]713 }
714 brd = peer;
715 if (brd.bitlen <= 30) {
[3621]716 for (i = 31; i >= brd.bitlen; i--) {
[821]717 if (brd_len == -1)
718 brd.data[0] |= htonl(1<<(31-i));
719 else
720 brd.data[0] &= ~htonl(1<<(31-i));
721 }
722 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen);
723 brd_len = brd.bytelen;
724 }
725 }
726 if (!scoped && cmd != RTM_DELADDR)
727 req.ifa.ifa_scope = default_scope(&lcl);
728
[1765]729 xrtnl_open(&rth);
[821]730
731 ll_init_map(&rth);
732
[1765]733 req.ifa.ifa_index = xll_name_to_index(d);
[821]734
735 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
[1765]736 return 2;
[821]737
[1765]738 return 0;
[821]739}
740
[1765]741/* Return value becomes exitcode. It's okay to not return at all */
[2725]742int FAST_FUNC do_ipaddr(char **argv)
[821]743{
[1765]744 static const char commands[] ALIGN1 =
[3621]745 /* 0 1 2 3 4 5 6 7 8 */
746 "add\0""change\0""chg\0""replace\0""delete\0""list\0""show\0""lst\0""flush\0";
747 int cmd = 2;
748
749 INIT_G();
750
[821]751 if (*argv) {
[2725]752 cmd = index_in_substrings(commands, *argv);
[3621]753 if (cmd < 0)
754 invarg_1_to_2(*argv, applet_name);
[2725]755 argv++;
[3621]756 if (cmd <= 4) {
757 return ipaddr_modify(
758 /*cmd:*/ cmd == 4 ? RTM_DELADDR : RTM_NEWADDR,
759 /*flags:*/
760 cmd == 0 ? NLM_F_CREATE|NLM_F_EXCL : /* add */
761 cmd == 1 || cmd == 2 ? NLM_F_REPLACE : /* change */
762 cmd == 3 ? NLM_F_CREATE|NLM_F_REPLACE : /* replace */
763 0 /* delete */
764 , argv);
765 }
[821]766 }
[3621]767 return ipaddr_list_or_flush(argv, cmd == 8);
[821]768}
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