1 /* vi: set sw=4 ts=4: */
2 /*
3 * stolen from net-tools-1.59 and stripped down for busybox by
4 * Erik Andersen <andersen@codepoet.org>
5 *
6 * Heavily modified by Manuel Novoa III Mar 12, 2001
7 *
8 * Added print_bytes_scaled function to reduce code size.
9 * Added some (potentially) missing defines.
10 * Improved display support for -a and for a named interface.
11 *
12 * -----------------------------------------------------------
13 *
14 * ifconfig This file contains an implementation of the command
15 * that either displays or sets the characteristics of
16 * one or more of the system's networking interfaces.
17 *
18 *
19 * Author: Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
20 * and others. Copyright 1993 MicroWalt Corporation
21 *
22 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
23 *
24 * Patched to support 'add' and 'del' keywords for INET(4) addresses
25 * by Mrs. Brisby <mrs.brisby@nimh.org>
26 *
27 * {1.34} - 19980630 - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
28 * - gettext instead of catgets for i18n
29 * 10/1998 - Andi Kleen. Use interface list primitives.
30 * 20001008 - Bernd Eckenfels, Patch from RH for setting mtu
31 * (default AF was wrong)
32 */
33
34 #include "libbb.h"
35 #include "inet_common.h"
36 #include <net/if.h>
37 #include <net/if_arp.h>
38 #ifdef HAVE_NET_ETHERNET_H
39 # include <net/ethernet.h>
40 #endif
41
42 #if ENABLE_FEATURE_HWIB
43 /* #include <linux/if_infiniband.h> */
44 # undef INFINIBAND_ALEN
45 # define INFINIBAND_ALEN 20
46 #endif
47
48 #if ENABLE_FEATURE_IPV6
49 # define HAVE_AFINET6 1
50 #else
51 # undef HAVE_AFINET6
52 #endif
53
54 #define _PATH_PROCNET_DEV "/proc/net/dev"
55 #define _PATH_PROCNET_IFINET6 "/proc/net/if_inet6"
56
57 #ifdef HAVE_AFINET6
58 # ifndef _LINUX_IN6_H
59 /*
60 * This is from linux/include/net/ipv6.h
61 */
62 struct in6_ifreq {
63 struct in6_addr ifr6_addr;
64 uint32_t ifr6_prefixlen;
65 unsigned int ifr6_ifindex;
66 };
67 # endif
68 #endif /* HAVE_AFINET6 */
69
70 /* Defines for glibc2.0 users. */
71 #ifndef SIOCSIFTXQLEN
72 # define SIOCSIFTXQLEN 0x8943
73 # define SIOCGIFTXQLEN 0x8942
74 #endif
75
76 /* ifr_qlen is ifru_ivalue, but it isn't present in 2.0 kernel headers */
77 #ifndef ifr_qlen
78 # define ifr_qlen ifr_ifru.ifru_mtu
79 #endif
80
81 #ifndef HAVE_TXQUEUELEN
82 # define HAVE_TXQUEUELEN 1
83 #endif
84
85 #ifndef IFF_DYNAMIC
86 # define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses */
87 #endif
88
89 /* Display an Internet socket address. */
INET_sprint(struct sockaddr * sap,int numeric)90 static const char* FAST_FUNC INET_sprint(struct sockaddr *sap, int numeric)
91 {
92 if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
93 return "[NONE SET]";
94 return auto_string(INET_rresolve((struct sockaddr_in *) sap, numeric, 0xffffff00));
95 }
96
97 #ifdef UNUSED_AND_BUGGY
INET_getsock(char * bufp,struct sockaddr * sap)98 static int INET_getsock(char *bufp, struct sockaddr *sap)
99 {
100 char *sp = bufp, *bp;
101 unsigned int i;
102 unsigned val;
103 struct sockaddr_in *sock_in;
104
105 sock_in = (struct sockaddr_in *) sap;
106 sock_in->sin_family = AF_INET;
107 sock_in->sin_port = 0;
108
109 val = 0;
110 bp = (char *) &val;
111 for (i = 0; i < sizeof(sock_in->sin_addr.s_addr); i++) {
112 *sp = toupper(*sp);
113
114 if ((unsigned)(*sp - 'A') <= 5)
115 bp[i] |= (int) (*sp - ('A' - 10));
116 else if (isdigit(*sp))
117 bp[i] |= (int) (*sp - '0');
118 else
119 return -1;
120
121 bp[i] <<= 4;
122 sp++;
123 *sp = toupper(*sp);
124
125 if ((unsigned)(*sp - 'A') <= 5)
126 bp[i] |= (int) (*sp - ('A' - 10));
127 else if (isdigit(*sp))
128 bp[i] |= (int) (*sp - '0');
129 else
130 return -1;
131
132 sp++;
133 }
134 sock_in->sin_addr.s_addr = htonl(val);
135
136 return (sp - bufp);
137 }
138 #endif
139
INET_input(const char * bufp,struct sockaddr * sap)140 static int FAST_FUNC INET_input(/*int type,*/ const char *bufp, struct sockaddr *sap)
141 {
142 return INET_resolve(bufp, (struct sockaddr_in *) sap, 0);
143 /*
144 switch (type) {
145 case 1:
146 return (INET_getsock(bufp, sap));
147 case 256:
148 return (INET_resolve(bufp, (struct sockaddr_in *) sap, 1));
149 default:
150 return (INET_resolve(bufp, (struct sockaddr_in *) sap, 0));
151 }
152 */
153 }
154
155 static const struct aftype inet_aftype = {
156 .name = "inet",
157 .title = "DARPA Internet",
158 .af = AF_INET,
159 .alen = 4,
160 .sprint = INET_sprint,
161 .input = INET_input,
162 };
163
164 #ifdef HAVE_AFINET6
165
166 /* Display an Internet socket address. */
167 /* dirty! struct sockaddr usually doesn't suffer for inet6 addresses, fst. */
INET6_sprint(struct sockaddr * sap,int numeric)168 static const char* FAST_FUNC INET6_sprint(struct sockaddr *sap, int numeric)
169 {
170 if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
171 return "[NONE SET]";
172 return auto_string(INET6_rresolve((struct sockaddr_in6 *) sap, numeric));
173 }
174
175 #ifdef UNUSED
INET6_getsock(char * bufp,struct sockaddr * sap)176 static int INET6_getsock(char *bufp, struct sockaddr *sap)
177 {
178 struct sockaddr_in6 *sin6;
179
180 sin6 = (struct sockaddr_in6 *) sap;
181 sin6->sin6_family = AF_INET6;
182 sin6->sin6_port = 0;
183
184 if (inet_pton(AF_INET6, bufp, sin6->sin6_addr.s6_addr) <= 0)
185 return -1;
186
187 return 16; /* ?;) */
188 }
189 #endif
190
INET6_input(const char * bufp,struct sockaddr * sap)191 static int FAST_FUNC INET6_input(/*int type,*/ const char *bufp, struct sockaddr *sap)
192 {
193 return INET6_resolve(bufp, (struct sockaddr_in6 *) sap);
194 /*
195 switch (type) {
196 case 1:
197 return (INET6_getsock(bufp, sap));
198 default:
199 return (INET6_resolve(bufp, (struct sockaddr_in6 *) sap));
200 }
201 */
202 }
203
204 static const struct aftype inet6_aftype = {
205 .name = "inet6",
206 .title = "IPv6",
207 .af = AF_INET6,
208 .alen = sizeof(struct in6_addr),
209 .sprint = INET6_sprint,
210 .input = INET6_input,
211 };
212
213 #endif /* HAVE_AFINET6 */
214
215 /* Display an UNSPEC address. */
UNSPEC_print(unsigned char * ptr)216 static char* FAST_FUNC UNSPEC_print(unsigned char *ptr)
217 {
218 char *buff;
219 char *pos;
220 unsigned int i;
221
222 buff = auto_string(xmalloc(sizeof(struct sockaddr) * 3 + 1));
223 pos = buff;
224 for (i = 0; i < sizeof(struct sockaddr); i++) {
225 /* careful -- not every libc's sprintf returns # bytes written */
226 sprintf(pos, "%02X-", (*ptr++ & 0377));
227 pos += 3;
228 }
229 /* Erase trailing "-". Works as long as sizeof(struct sockaddr) != 0 */
230 *--pos = '\0';
231 return buff;
232 }
233
234 /* Display an UNSPEC socket address. */
UNSPEC_sprint(struct sockaddr * sap,int numeric UNUSED_PARAM)235 static const char* FAST_FUNC UNSPEC_sprint(struct sockaddr *sap, int numeric UNUSED_PARAM)
236 {
237 if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
238 return "[NONE SET]";
239 return UNSPEC_print((unsigned char *)sap->sa_data);
240 }
241
242 static const struct aftype unspec_aftype = {
243 .name = "unspec",
244 .title = "UNSPEC",
245 .af = AF_UNSPEC,
246 .alen = 0,
247 .print = UNSPEC_print,
248 .sprint = UNSPEC_sprint,
249 };
250
251 static const struct aftype *const aftypes[] = {
252 &inet_aftype,
253 #ifdef HAVE_AFINET6
254 &inet6_aftype,
255 #endif
256 &unspec_aftype,
257 NULL
258 };
259
260 /* Check our protocol family table for this family. */
get_aftype(const char * name)261 const struct aftype* FAST_FUNC get_aftype(const char *name)
262 {
263 const struct aftype *const *afp;
264
265 afp = aftypes;
266 while (*afp != NULL) {
267 if (strcmp((*afp)->name, name) == 0)
268 return (*afp);
269 afp++;
270 }
271 return NULL;
272 }
273
274 /* Check our protocol family table for this family. */
get_afntype(int af)275 static const struct aftype *get_afntype(int af)
276 {
277 const struct aftype *const *afp;
278
279 afp = aftypes;
280 while (*afp != NULL) {
281 if ((*afp)->af == af)
282 return *afp;
283 afp++;
284 }
285 return NULL;
286 }
287
288 struct user_net_device_stats {
289 unsigned long long rx_packets; /* total packets received */
290 unsigned long long tx_packets; /* total packets transmitted */
291 unsigned long long rx_bytes; /* total bytes received */
292 unsigned long long tx_bytes; /* total bytes transmitted */
293 unsigned long rx_errors; /* bad packets received */
294 unsigned long tx_errors; /* packet transmit problems */
295 unsigned long rx_dropped; /* no space in linux buffers */
296 unsigned long tx_dropped; /* no space available in linux */
297 unsigned long rx_multicast; /* multicast packets received */
298 unsigned long rx_compressed;
299 unsigned long tx_compressed;
300 unsigned long collisions;
301
302 /* detailed rx_errors: */
303 unsigned long rx_length_errors;
304 unsigned long rx_over_errors; /* receiver ring buff overflow */
305 unsigned long rx_crc_errors; /* recved pkt with crc error */
306 unsigned long rx_frame_errors; /* recv'd frame alignment error */
307 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
308 unsigned long rx_missed_errors; /* receiver missed packet */
309 /* detailed tx_errors */
310 unsigned long tx_aborted_errors;
311 unsigned long tx_carrier_errors;
312 unsigned long tx_fifo_errors;
313 unsigned long tx_heartbeat_errors;
314 unsigned long tx_window_errors;
315 };
316
317 struct interface {
318 struct interface *next, *prev;
319 char name[IFNAMSIZ]; /* interface name */
320 short type; /* if type */
321 short flags; /* various flags */
322 int metric; /* routing metric */
323 int mtu; /* MTU value */
324 int tx_queue_len; /* transmit queue length */
325 struct ifmap map; /* hardware setup */
326 struct sockaddr addr; /* IP address */
327 struct sockaddr dstaddr; /* P-P IP address */
328 struct sockaddr broadaddr; /* IP broadcast address */
329 struct sockaddr netmask; /* IP network mask */
330 int has_ip;
331 char hwaddr[32]; /* HW address */
332 int statistics_valid;
333 struct user_net_device_stats stats; /* statistics */
334 int keepalive; /* keepalive value for SLIP */
335 int outfill; /* outfill value for SLIP */
336 };
337
338
339 smallint interface_opt_a; /* show all interfaces */
340
341 static struct interface *int_list, *int_last;
342
343
344 #if 0
345 /* like strcmp(), but knows about numbers */
346 except that the freshly added calls to xatoul() brf on ethernet aliases with
347 uClibc with e.g.: ife->name='lo' name='eth0:1'
348 static int nstrcmp(const char *a, const char *b)
349 {
350 const char *a_ptr = a;
351 const char *b_ptr = b;
352
353 while (*a == *b) {
354 if (*a == '\0') {
355 return 0;
356 }
357 if (!isdigit(*a) && isdigit(*(a+1))) {
358 a_ptr = a+1;
359 b_ptr = b+1;
360 }
361 a++;
362 b++;
363 }
364
365 if (isdigit(*a) && isdigit(*b)) {
366 return xatoul(a_ptr) > xatoul(b_ptr) ? 1 : -1;
367 }
368 return *a - *b;
369 }
370 #endif
371
add_interface(char * name)372 static struct interface *add_interface(char *name)
373 {
374 struct interface *ife, **nextp, *new;
375
376 for (ife = int_last; ife; ife = ife->prev) {
377 int n = /*n*/strcmp(ife->name, name);
378
379 if (n == 0)
380 return ife;
381 if (n < 0)
382 break;
383 }
384
385 new = xzalloc(sizeof(*new));
386 strncpy_IFNAMSIZ(new->name, name);
387 nextp = ife ? &ife->next : &int_list;
388 new->prev = ife;
389 new->next = *nextp;
390 if (new->next)
391 new->next->prev = new;
392 else
393 int_last = new;
394 *nextp = new;
395 return new;
396 }
397
get_name(char * name,char * p)398 static char *get_name(char *name, char *p)
399 {
400 /* Extract <name> from nul-terminated p where p matches
401 * <name>: after leading whitespace.
402 * If match is not made, set name empty and return unchanged p
403 */
404 char *nameend;
405 char *namestart = skip_whitespace(p);
406
407 nameend = namestart;
408 while (*nameend && *nameend != ':' && !isspace(*nameend))
409 nameend++;
410 if (*nameend == ':') {
411 if ((nameend - namestart) < IFNAMSIZ) {
412 memcpy(name, namestart, nameend - namestart);
413 name[nameend - namestart] = '\0';
414 p = nameend;
415 } else {
416 /* Interface name too large */
417 name[0] = '\0';
418 }
419 } else {
420 /* trailing ':' not found - return empty */
421 name[0] = '\0';
422 }
423 return p + 1;
424 }
425
426 /* If scanf supports size qualifiers for %n conversions, then we can
427 * use a modified fmt that simply stores the position in the fields
428 * having no associated fields in the proc string. Of course, we need
429 * to zero them again when we're done. But that is smaller than the
430 * old approach of multiple scanf occurrences with large numbers of
431 * args. */
432
433 /* static const char *const ss_fmt[] = { */
434 /* "%lln%llu%lu%lu%lu%lu%ln%ln%lln%llu%lu%lu%lu%lu%lu", */
435 /* "%llu%llu%lu%lu%lu%lu%ln%ln%llu%llu%lu%lu%lu%lu%lu", */
436 /* "%llu%llu%lu%lu%lu%lu%lu%lu%llu%llu%lu%lu%lu%lu%lu%lu" */
437 /* }; */
438
439 /* Lie about the size of the int pointed to for %n. */
440 #if INT_MAX == LONG_MAX
441 static const char *const ss_fmt[] = {
442 "%n%llu%u%u%u%u%n%n%n%llu%u%u%u%u%u",
443 "%llu%llu%u%u%u%u%n%n%llu%llu%u%u%u%u%u",
444 "%llu%llu%u%u%u%u%u%u%llu%llu%u%u%u%u%u%u"
445 };
446 #else
447 static const char *const ss_fmt[] = {
448 "%n%llu%lu%lu%lu%lu%n%n%n%llu%lu%lu%lu%lu%lu",
449 "%llu%llu%lu%lu%lu%lu%n%n%llu%llu%lu%lu%lu%lu%lu",
450 "%llu%llu%lu%lu%lu%lu%lu%lu%llu%llu%lu%lu%lu%lu%lu%lu"
451 };
452
453 #endif
454
get_dev_fields(char * bp,struct interface * ife,int procnetdev_vsn)455 static void get_dev_fields(char *bp, struct interface *ife, int procnetdev_vsn)
456 {
457 memset(&ife->stats, 0, sizeof(struct user_net_device_stats));
458
459 sscanf(bp, ss_fmt[procnetdev_vsn],
460 &ife->stats.rx_bytes, /* missing for 0 */
461 &ife->stats.rx_packets,
462 &ife->stats.rx_errors,
463 &ife->stats.rx_dropped,
464 &ife->stats.rx_fifo_errors,
465 &ife->stats.rx_frame_errors,
466 &ife->stats.rx_compressed, /* missing for <= 1 */
467 &ife->stats.rx_multicast, /* missing for <= 1 */
468 &ife->stats.tx_bytes, /* missing for 0 */
469 &ife->stats.tx_packets,
470 &ife->stats.tx_errors,
471 &ife->stats.tx_dropped,
472 &ife->stats.tx_fifo_errors,
473 &ife->stats.collisions,
474 &ife->stats.tx_carrier_errors,
475 &ife->stats.tx_compressed /* missing for <= 1 */
476 );
477
478 if (procnetdev_vsn <= 1) {
479 if (procnetdev_vsn == 0) {
480 ife->stats.rx_bytes = 0;
481 ife->stats.tx_bytes = 0;
482 }
483 ife->stats.rx_multicast = 0;
484 ife->stats.rx_compressed = 0;
485 ife->stats.tx_compressed = 0;
486 }
487 }
488
procnetdev_version(char * buf)489 static int procnetdev_version(char *buf)
490 {
491 if (strstr(buf, "compressed"))
492 return 2;
493 if (strstr(buf, "bytes"))
494 return 1;
495 return 0;
496 }
497
if_readconf(void)498 static int if_readconf(void)
499 {
500 int numreqs = 30;
501 struct ifconf ifc;
502 struct ifreq *ifr;
503 int n, err = -1;
504 int skfd;
505
506 ifc.ifc_buf = NULL;
507
508 /* SIOCGIFCONF currently seems to only work properly on AF_INET sockets
509 (as of 2.1.128) */
510 skfd = socket(AF_INET, SOCK_DGRAM, 0);
511 if (skfd < 0) {
512 bb_perror_msg("error: no inet socket available");
513 return -1;
514 }
515
516 for (;;) {
517 ifc.ifc_len = sizeof(struct ifreq) * numreqs;
518 ifc.ifc_buf = xrealloc(ifc.ifc_buf, ifc.ifc_len);
519
520 if (ioctl_or_warn(skfd, SIOCGIFCONF, &ifc) < 0) {
521 goto out;
522 }
523 if (ifc.ifc_len == (int)(sizeof(struct ifreq) * numreqs)) {
524 /* assume it overflowed and try again */
525 numreqs += 10;
526 continue;
527 }
528 break;
529 }
530
531 ifr = ifc.ifc_req;
532 for (n = 0; n < ifc.ifc_len; n += sizeof(struct ifreq)) {
533 add_interface(ifr->ifr_name);
534 ifr++;
535 }
536 err = 0;
537
538 out:
539 close(skfd);
540 free(ifc.ifc_buf);
541 return err;
542 }
543
if_readlist_proc(char * target)544 static int if_readlist_proc(char *target)
545 {
546 static smallint proc_read;
547
548 FILE *fh;
549 char buf[512];
550 struct interface *ife;
551 int err, procnetdev_vsn;
552
553 if (proc_read)
554 return 0;
555 if (!target)
556 proc_read = 1;
557
558 fh = fopen_or_warn(_PATH_PROCNET_DEV, "r");
559 if (!fh) {
560 return if_readconf();
561 }
562 fgets(buf, sizeof buf, fh); /* eat line */
563 fgets(buf, sizeof buf, fh);
564
565 procnetdev_vsn = procnetdev_version(buf);
566
567 err = 0;
568 while (fgets(buf, sizeof buf, fh)) {
569 char *s, name[128];
570
571 s = get_name(name, buf);
572 ife = add_interface(name);
573 get_dev_fields(s, ife, procnetdev_vsn);
574 ife->statistics_valid = 1;
575 if (target && strcmp(target, name) == 0)
576 break;
577 }
578 if (ferror(fh)) {
579 bb_perror_msg(_PATH_PROCNET_DEV);
580 err = -1;
581 proc_read = 0;
582 }
583 fclose(fh);
584 return err;
585 }
586
if_readlist(void)587 static int if_readlist(void)
588 {
589 int err = if_readlist_proc(NULL);
590 /* Needed in order to get ethN:M aliases */
591 if (!err)
592 err = if_readconf();
593 return err;
594 }
595
596 /* Fetch the interface configuration from the kernel. */
if_fetch(struct interface * ife)597 static int if_fetch(struct interface *ife)
598 {
599 struct ifreq ifr;
600 char *ifname = ife->name;
601 int skfd;
602
603 skfd = xsocket(AF_INET, SOCK_DGRAM, 0);
604
605 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
606 if (ioctl(skfd, SIOCGIFFLAGS, &ifr) < 0) {
607 close(skfd);
608 return -1;
609 }
610 ife->flags = ifr.ifr_flags;
611
612 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
613 memset(ife->hwaddr, 0, 32);
614 if (ioctl(skfd, SIOCGIFHWADDR, &ifr) >= 0)
615 memcpy(ife->hwaddr, ifr.ifr_hwaddr.sa_data, 8);
616
617 ife->type = ifr.ifr_hwaddr.sa_family;
618
619 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
620 ife->metric = 0;
621 if (ioctl(skfd, SIOCGIFMETRIC, &ifr) >= 0)
622 ife->metric = ifr.ifr_metric;
623
624 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
625 ife->mtu = 0;
626 if (ioctl(skfd, SIOCGIFMTU, &ifr) >= 0)
627 ife->mtu = ifr.ifr_mtu;
628
629 memset(&ife->map, 0, sizeof(struct ifmap));
630 #ifdef SIOCGIFMAP
631 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
632 if (ioctl(skfd, SIOCGIFMAP, &ifr) == 0)
633 ife->map = ifr.ifr_map;
634 #endif
635
636 #ifdef HAVE_TXQUEUELEN
637 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
638 ife->tx_queue_len = -1; /* unknown value */
639 if (ioctl(skfd, SIOCGIFTXQLEN, &ifr) >= 0)
640 ife->tx_queue_len = ifr.ifr_qlen;
641 #else
642 ife->tx_queue_len = -1; /* unknown value */
643 #endif
644
645 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
646 ifr.ifr_addr.sa_family = AF_INET;
647 memset(&ife->addr, 0, sizeof(struct sockaddr));
648 if (ioctl(skfd, SIOCGIFADDR, &ifr) == 0) {
649 ife->has_ip = 1;
650 ife->addr = ifr.ifr_addr;
651 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
652 memset(&ife->dstaddr, 0, sizeof(struct sockaddr));
653 if (ioctl(skfd, SIOCGIFDSTADDR, &ifr) >= 0)
654 ife->dstaddr = ifr.ifr_dstaddr;
655
656 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
657 memset(&ife->broadaddr, 0, sizeof(struct sockaddr));
658 if (ioctl(skfd, SIOCGIFBRDADDR, &ifr) >= 0)
659 ife->broadaddr = ifr.ifr_broadaddr;
660
661 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
662 memset(&ife->netmask, 0, sizeof(struct sockaddr));
663 if (ioctl(skfd, SIOCGIFNETMASK, &ifr) >= 0)
664 ife->netmask = ifr.ifr_netmask;
665 }
666
667 close(skfd);
668 return 0;
669 }
670
do_if_fetch(struct interface * ife)671 static int do_if_fetch(struct interface *ife)
672 {
673 if (if_fetch(ife) < 0) {
674 const char *errmsg;
675
676 if (errno == ENODEV) {
677 /* Give better error message for this case. */
678 errmsg = "Device not found";
679 } else {
680 errmsg = strerror(errno);
681 }
682 bb_error_msg("%s: error fetching interface information: %s",
683 ife->name, errmsg);
684 return -1;
685 }
686 return 0;
687 }
688
689 static const struct hwtype unspec_hwtype = {
690 .name = "unspec",
691 .title = "UNSPEC",
692 .type = -1,
693 .print = UNSPEC_print
694 };
695
696 static const struct hwtype loop_hwtype = {
697 .name = "loop",
698 .title = "Local Loopback",
699 .type = ARPHRD_LOOPBACK
700 };
701
702 /* Display an Ethernet address in readable format. */
ether_print(unsigned char * ptr)703 static char* FAST_FUNC ether_print(unsigned char *ptr)
704 {
705 char *buff;
706 buff = xasprintf("%02X:%02X:%02X:%02X:%02X:%02X",
707 (ptr[0] & 0377), (ptr[1] & 0377), (ptr[2] & 0377),
708 (ptr[3] & 0377), (ptr[4] & 0377), (ptr[5] & 0377)
709 );
710 return auto_string(buff);
711 }
712
713 static const struct hwtype ether_hwtype = {
714 .name = "ether",
715 .title = "Ethernet",
716 .type = ARPHRD_ETHER,
717 .alen = ETH_ALEN,
718 .print = ether_print,
719 .input = in_ether
720 };
721
722 static const struct hwtype ppp_hwtype = {
723 .name = "ppp",
724 .title = "Point-to-Point Protocol",
725 .type = ARPHRD_PPP
726 };
727
728 #if ENABLE_FEATURE_IPV6
729 static const struct hwtype sit_hwtype = {
730 .name = "sit",
731 .title = "IPv6-in-IPv4",
732 .type = ARPHRD_SIT,
733 .print = UNSPEC_print,
734 .suppress_null_addr = 1
735 };
736 #endif
737 #if ENABLE_FEATURE_HWIB
738 static const struct hwtype ib_hwtype = {
739 .name = "infiniband",
740 .title = "InfiniBand",
741 .type = ARPHRD_INFINIBAND,
742 .alen = INFINIBAND_ALEN,
743 .print = UNSPEC_print,
744 .input = in_ib,
745 };
746 #endif
747
748
749 static const struct hwtype *const hwtypes[] = {
750 &loop_hwtype,
751 ðer_hwtype,
752 &ppp_hwtype,
753 &unspec_hwtype,
754 #if ENABLE_FEATURE_IPV6
755 &sit_hwtype,
756 #endif
757 #if ENABLE_FEATURE_HWIB
758 &ib_hwtype,
759 #endif
760 NULL
761 };
762
763 #ifdef IFF_PORTSEL
764 static const char *const if_port_text[] = {
765 /* Keep in step with <linux/netdevice.h> */
766 "unknown",
767 "10base2",
768 "10baseT",
769 "AUI",
770 "100baseT",
771 "100baseTX",
772 "100baseFX",
773 NULL
774 };
775 #endif
776
777 /* Check our hardware type table for this type. */
get_hwtype(const char * name)778 const struct hwtype* FAST_FUNC get_hwtype(const char *name)
779 {
780 const struct hwtype *const *hwp;
781
782 hwp = hwtypes;
783 while (*hwp != NULL) {
784 if (strcmp((*hwp)->name, name) == 0)
785 return (*hwp);
786 hwp++;
787 }
788 return NULL;
789 }
790
791 /* Check our hardware type table for this type. */
get_hwntype(int type)792 const struct hwtype* FAST_FUNC get_hwntype(int type)
793 {
794 const struct hwtype *const *hwp;
795
796 hwp = hwtypes;
797 while (*hwp != NULL) {
798 if ((*hwp)->type == type)
799 return *hwp;
800 hwp++;
801 }
802 return NULL;
803 }
804
805 /* return 1 if address is all zeros */
hw_null_address(const struct hwtype * hw,void * ap)806 static int hw_null_address(const struct hwtype *hw, void *ap)
807 {
808 int i;
809 unsigned char *address = (unsigned char *) ap;
810
811 for (i = 0; i < hw->alen; i++)
812 if (address[i])
813 return 0;
814 return 1;
815 }
816
817 static const char TRext[] ALIGN1 = "\0\0\0Ki\0Mi\0Gi\0Ti";
818
print_bytes_scaled(unsigned long long ull,const char * end)819 static void print_bytes_scaled(unsigned long long ull, const char *end)
820 {
821 unsigned long long int_part;
822 const char *ext;
823 unsigned int frac_part;
824 int i;
825
826 frac_part = 0;
827 ext = TRext;
828 int_part = ull;
829 i = 4;
830 do {
831 if (int_part >= 1024) {
832 frac_part = ((((unsigned int) int_part) & (1024-1)) * 10) / 1024;
833 int_part /= 1024;
834 ext += 3; /* KiB, MiB, GiB, TiB */
835 }
836 --i;
837 } while (i);
838
839 printf("X bytes:%llu (%llu.%u %sB)%s", ull, int_part, frac_part, ext, end);
840 }
841
842
843 #ifdef HAVE_AFINET6
844 #define IPV6_ADDR_ANY 0x0000U
845
846 #define IPV6_ADDR_UNICAST 0x0001U
847 #define IPV6_ADDR_MULTICAST 0x0002U
848 #define IPV6_ADDR_ANYCAST 0x0004U
849
850 #define IPV6_ADDR_LOOPBACK 0x0010U
851 #define IPV6_ADDR_LINKLOCAL 0x0020U
852 #define IPV6_ADDR_SITELOCAL 0x0040U
853
854 #define IPV6_ADDR_COMPATv4 0x0080U
855
856 #define IPV6_ADDR_SCOPE_MASK 0x00f0U
857
858 #define IPV6_ADDR_MAPPED 0x1000U
859 #define IPV6_ADDR_RESERVED 0x2000U /* reserved address space */
860
861
ife_print6(struct interface * ptr)862 static void ife_print6(struct interface *ptr)
863 {
864 FILE *f;
865 char addr6[40], devname[21];
866 struct sockaddr_in6 sap;
867 int plen, scope, dad_status, if_idx;
868 char addr6p[8][5];
869
870 f = fopen_for_read(_PATH_PROCNET_IFINET6);
871 if (f == NULL)
872 return;
873
874 while (fscanf
875 (f, "%4s%4s%4s%4s%4s%4s%4s%4s %08x %02x %02x %02x %20s\n",
876 addr6p[0], addr6p[1], addr6p[2], addr6p[3], addr6p[4],
877 addr6p[5], addr6p[6], addr6p[7], &if_idx, &plen, &scope,
878 &dad_status, devname) != EOF
879 ) {
880 if (strcmp(devname, ptr->name) == 0) {
881 sprintf(addr6, "%s:%s:%s:%s:%s:%s:%s:%s",
882 addr6p[0], addr6p[1], addr6p[2], addr6p[3],
883 addr6p[4], addr6p[5], addr6p[6], addr6p[7]);
884 memset(&sap, 0, sizeof(sap));
885 inet_pton(AF_INET6, addr6,
886 (struct sockaddr *) &sap.sin6_addr);
887 sap.sin6_family = AF_INET6;
888 printf(" inet6 addr: %s/%d",
889 INET6_sprint((struct sockaddr *) &sap, 1),
890 plen);
891 printf(" Scope:");
892 switch (scope & IPV6_ADDR_SCOPE_MASK) {
893 case 0:
894 puts("Global");
895 break;
896 case IPV6_ADDR_LINKLOCAL:
897 puts("Link");
898 break;
899 case IPV6_ADDR_SITELOCAL:
900 puts("Site");
901 break;
902 case IPV6_ADDR_COMPATv4:
903 puts("Compat");
904 break;
905 case IPV6_ADDR_LOOPBACK:
906 puts("Host");
907 break;
908 default:
909 puts("Unknown");
910 }
911 }
912 }
913 fclose(f);
914 }
915 #else
916 #define ife_print6(a) ((void)0)
917 #endif
918
ife_print(struct interface * ptr)919 static void ife_print(struct interface *ptr)
920 {
921 const struct aftype *ap;
922 const struct hwtype *hw;
923 int hf;
924 int can_compress = 0;
925
926 ap = get_afntype(ptr->addr.sa_family);
927 if (ap == NULL)
928 ap = get_afntype(0);
929
930 hf = ptr->type;
931
932 if (hf == ARPHRD_CSLIP || hf == ARPHRD_CSLIP6)
933 can_compress = 1;
934
935 hw = get_hwntype(hf);
936 if (hw == NULL)
937 hw = get_hwntype(-1);
938
939 printf("%-9s Link encap:%s ", ptr->name, hw->title);
940 /* For some hardware types (eg Ash, ATM) we don't print the
941 hardware address if it's null. */
942 if (hw->print != NULL
943 && !(hw_null_address(hw, ptr->hwaddr) && hw->suppress_null_addr)
944 ) {
945 printf("HWaddr %s ", hw->print((unsigned char *)ptr->hwaddr));
946 }
947 #ifdef IFF_PORTSEL
948 if (ptr->flags & IFF_PORTSEL) {
949 printf("Media:%s", if_port_text[ptr->map.port] /* [0] */);
950 if (ptr->flags & IFF_AUTOMEDIA)
951 printf("(auto)");
952 }
953 #endif
954 bb_putchar('\n');
955
956 if (ptr->has_ip) {
957 printf(" %s addr:%s ", ap->name,
958 ap->sprint(&ptr->addr, 1));
959 if (ptr->flags & IFF_POINTOPOINT) {
960 printf(" P-t-P:%s ", ap->sprint(&ptr->dstaddr, 1));
961 }
962 if (ptr->flags & IFF_BROADCAST) {
963 printf(" Bcast:%s ", ap->sprint(&ptr->broadaddr, 1));
964 }
965 printf(" Mask:%s\n", ap->sprint(&ptr->netmask, 1));
966 }
967
968 ife_print6(ptr);
969
970 printf(" ");
971 /* DONT FORGET TO ADD THE FLAGS IN ife_print_short, too */
972
973 if (ptr->flags == 0) {
974 printf("[NO FLAGS] ");
975 } else {
976 static const char ife_print_flags_strs[] ALIGN1 =
977 "UP\0"
978 "BROADCAST\0"
979 "DEBUG\0"
980 "LOOPBACK\0"
981 "POINTOPOINT\0"
982 "NOTRAILERS\0"
983 "RUNNING\0"
984 "NOARP\0"
985 "PROMISC\0"
986 "ALLMULTI\0"
987 "SLAVE\0"
988 "MASTER\0"
989 "MULTICAST\0"
990 #ifdef HAVE_DYNAMIC
991 "DYNAMIC\0"
992 #endif
993 ;
994 static const unsigned short ife_print_flags_mask[] ALIGN2 = {
995 IFF_UP,
996 IFF_BROADCAST,
997 IFF_DEBUG,
998 IFF_LOOPBACK,
999 IFF_POINTOPOINT,
1000 IFF_NOTRAILERS,
1001 IFF_RUNNING,
1002 IFF_NOARP,
1003 IFF_PROMISC,
1004 IFF_ALLMULTI,
1005 IFF_SLAVE,
1006 IFF_MASTER,
1007 IFF_MULTICAST
1008 #ifdef HAVE_DYNAMIC
1009 ,IFF_DYNAMIC
1010 #endif
1011 };
1012 const unsigned short *mask = ife_print_flags_mask;
1013 const char *str = ife_print_flags_strs;
1014 do {
1015 if (ptr->flags & *mask) {
1016 printf("%s ", str);
1017 }
1018 mask++;
1019 str += strlen(str) + 1;
1020 } while (*str);
1021 }
1022
1023 /* DONT FORGET TO ADD THE FLAGS IN ife_print_short */
1024 printf(" MTU:%d Metric:%d", ptr->mtu, ptr->metric ? ptr->metric : 1);
1025 #ifdef SIOCSKEEPALIVE
1026 if (ptr->outfill || ptr->keepalive)
1027 printf(" Outfill:%d Keepalive:%d", ptr->outfill, ptr->keepalive);
1028 #endif
1029 bb_putchar('\n');
1030
1031 /* If needed, display the interface statistics. */
1032
1033 if (ptr->statistics_valid) {
1034 /* XXX: statistics are currently only printed for the primary address,
1035 * not for the aliases, although strictly speaking they're shared
1036 * by all addresses.
1037 */
1038 printf(" ");
1039
1040 printf("RX packets:%llu errors:%lu dropped:%lu overruns:%lu frame:%lu\n",
1041 ptr->stats.rx_packets, ptr->stats.rx_errors,
1042 ptr->stats.rx_dropped, ptr->stats.rx_fifo_errors,
1043 ptr->stats.rx_frame_errors);
1044 if (can_compress)
1045 printf(" compressed:%lu\n",
1046 ptr->stats.rx_compressed);
1047 printf(" ");
1048 printf("TX packets:%llu errors:%lu dropped:%lu overruns:%lu carrier:%lu\n",
1049 ptr->stats.tx_packets, ptr->stats.tx_errors,
1050 ptr->stats.tx_dropped, ptr->stats.tx_fifo_errors,
1051 ptr->stats.tx_carrier_errors);
1052 printf(" collisions:%lu ", ptr->stats.collisions);
1053 if (can_compress)
1054 printf("compressed:%lu ", ptr->stats.tx_compressed);
1055 if (ptr->tx_queue_len != -1)
1056 printf("txqueuelen:%d ", ptr->tx_queue_len);
1057 printf("\n R");
1058 print_bytes_scaled(ptr->stats.rx_bytes, " T");
1059 print_bytes_scaled(ptr->stats.tx_bytes, "\n");
1060 }
1061
1062 if (ptr->map.irq || ptr->map.mem_start
1063 || ptr->map.dma || ptr->map.base_addr
1064 ) {
1065 printf(" ");
1066 if (ptr->map.irq)
1067 printf("Interrupt:%d ", ptr->map.irq);
1068 if (ptr->map.base_addr >= 0x100) /* Only print devices using it for I/O maps */
1069 printf("Base address:0x%lx ",
1070 (unsigned long) ptr->map.base_addr);
1071 if (ptr->map.mem_start) {
1072 printf("Memory:%lx-%lx ", ptr->map.mem_start,
1073 ptr->map.mem_end);
1074 }
1075 if (ptr->map.dma)
1076 printf("DMA chan:%x ", ptr->map.dma);
1077 bb_putchar('\n');
1078 }
1079 bb_putchar('\n');
1080 }
1081
do_if_print(struct interface * ife)1082 static int do_if_print(struct interface *ife) /*, int *opt_a)*/
1083 {
1084 int res;
1085
1086 res = do_if_fetch(ife);
1087 if (res >= 0) {
1088 if ((ife->flags & IFF_UP) || interface_opt_a)
1089 ife_print(ife);
1090 }
1091 return res;
1092 }
1093
lookup_interface(char * name)1094 static struct interface *lookup_interface(char *name)
1095 {
1096 struct interface *ife = NULL;
1097
1098 if (if_readlist_proc(name) < 0)
1099 return NULL;
1100 ife = add_interface(name);
1101 return ife;
1102 }
1103
1104 #ifdef UNUSED
for_all_interfaces(int (* doit)(struct interface *,void *),void * cookie)1105 static int for_all_interfaces(int (*doit) (struct interface *, void *),
1106 void *cookie)
1107 {
1108 struct interface *ife;
1109
1110 if (!int_list && (if_readlist() < 0))
1111 return -1;
1112 for (ife = int_list; ife; ife = ife->next) {
1113 int err = doit(ife, cookie);
1114 if (err)
1115 return err;
1116 }
1117 return 0;
1118 }
1119 #endif
1120
1121 /* for ipv4 add/del modes */
if_print(char * ifname)1122 static int if_print(char *ifname)
1123 {
1124 struct interface *ife;
1125 int res;
1126
1127 if (!ifname) {
1128 /*res = for_all_interfaces(do_if_print, &interface_opt_a);*/
1129 if (!int_list && (if_readlist() < 0))
1130 return -1;
1131 for (ife = int_list; ife; ife = ife->next) {
1132 int err = do_if_print(ife); /*, &interface_opt_a);*/
1133 if (err)
1134 return err;
1135 }
1136 return 0;
1137 }
1138 ife = lookup_interface(ifname);
1139 res = do_if_fetch(ife);
1140 if (res >= 0)
1141 ife_print(ife);
1142 return res;
1143 }
1144
1145 #if ENABLE_FEATURE_HWIB
1146 /* Input an Infiniband address and convert to binary. */
in_ib(const char * bufp,struct sockaddr * sap)1147 int FAST_FUNC in_ib(const char *bufp, struct sockaddr *sap)
1148 {
1149 sap->sa_family = ib_hwtype.type;
1150 //TODO: error check?
1151 hex2bin((char*)sap->sa_data, bufp, INFINIBAND_ALEN);
1152 # ifdef HWIB_DEBUG
1153 fprintf(stderr, "in_ib(%s): %s\n", bufp, UNSPEC_print(sap->sa_data));
1154 # endif
1155 return 0;
1156 }
1157 #endif
1158
display_interfaces(char * ifname)1159 int FAST_FUNC display_interfaces(char *ifname)
1160 {
1161 int status;
1162
1163 status = if_print(ifname);
1164
1165 return (status < 0); /* status < 0 == 1 -- error */
1166 }
1167