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 #include "libbb.h"
34 #include "inet_common.h"
35 #include <net/if.h>
36 #include <net/if_arp.h>
37 #ifdef HAVE_NET_ETHERNET_H
38 # include <net/ethernet.h>
39 #endif
40
41 #if ENABLE_FEATURE_HWIB
42 /* #include <linux/if_infiniband.h> */
43 # undef INFINIBAND_ALEN
44 # define INFINIBAND_ALEN 20
45 #endif
46
47 #if ENABLE_FEATURE_IPV6
48 # define HAVE_AFINET6 1
49 #else
50 # undef HAVE_AFINET6
51 #endif
52
53 #define _PATH_PROCNET_DEV "/proc/net/dev"
54 #define _PATH_PROCNET_IFINET6 "/proc/net/if_inet6"
55
56 #ifdef HAVE_AFINET6
57 # ifndef _LINUX_IN6_H
58 /*
59 * This is from linux/include/net/ipv6.h
60 */
61 struct in6_ifreq {
62 struct in6_addr ifr6_addr;
63 uint32_t ifr6_prefixlen;
64 unsigned int ifr6_ifindex;
65 };
66 # endif
67 #endif /* HAVE_AFINET6 */
68
69 /* Defines for glibc2.0 users. */
70 #ifndef SIOCSIFTXQLEN
71 # define SIOCSIFTXQLEN 0x8943
72 # define SIOCGIFTXQLEN 0x8942
73 #endif
74
75 /* ifr_qlen is ifru_ivalue, but it isn't present in 2.0 kernel headers */
76 #ifndef ifr_qlen
77 # define ifr_qlen ifr_ifru.ifru_mtu
78 #endif
79
80 #ifndef HAVE_TXQUEUELEN
81 # define HAVE_TXQUEUELEN 1
82 #endif
83
84 #ifndef IFF_DYNAMIC
85 # define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses */
86 #endif
87
88 /* Display an Internet socket address. */
INET_sprint(struct sockaddr * sap,int numeric)89 static const char* FAST_FUNC INET_sprint(struct sockaddr *sap, int numeric)
90 {
91 if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
92 return "[NONE SET]";
93 return auto_string(INET_rresolve((struct sockaddr_in *) sap, numeric, 0xffffff00));
94 }
95
96 #ifdef UNUSED_AND_BUGGY
INET_getsock(char * bufp,struct sockaddr * sap)97 static int INET_getsock(char *bufp, struct sockaddr *sap)
98 {
99 char *sp = bufp, *bp;
100 unsigned int i;
101 unsigned val;
102 struct sockaddr_in *sock_in;
103
104 sock_in = (struct sockaddr_in *) sap;
105 sock_in->sin_family = AF_INET;
106 sock_in->sin_port = 0;
107
108 val = 0;
109 bp = (char *) &val;
110 for (i = 0; i < sizeof(sock_in->sin_addr.s_addr); i++) {
111 *sp = toupper(*sp);
112
113 if ((unsigned)(*sp - 'A') <= 5)
114 bp[i] |= (int) (*sp - ('A' - 10));
115 else if (isdigit(*sp))
116 bp[i] |= (int) (*sp - '0');
117 else
118 return -1;
119
120 bp[i] <<= 4;
121 sp++;
122 *sp = toupper(*sp);
123
124 if ((unsigned)(*sp - 'A') <= 5)
125 bp[i] |= (int) (*sp - ('A' - 10));
126 else if (isdigit(*sp))
127 bp[i] |= (int) (*sp - '0');
128 else
129 return -1;
130
131 sp++;
132 }
133 sock_in->sin_addr.s_addr = htonl(val);
134
135 return (sp - bufp);
136 }
137 #endif
138
INET_input(const char * bufp,struct sockaddr * sap)139 static int FAST_FUNC INET_input(/*int type,*/ const char *bufp, struct sockaddr *sap)
140 {
141 return INET_resolve(bufp, (struct sockaddr_in *) sap, 0);
142 /*
143 switch (type) {
144 case 1:
145 return (INET_getsock(bufp, sap));
146 case 256:
147 return (INET_resolve(bufp, (struct sockaddr_in *) sap, 1));
148 default:
149 return (INET_resolve(bufp, (struct sockaddr_in *) sap, 0));
150 }
151 */
152 }
153
154 static const struct aftype inet_aftype = {
155 .name = "inet",
156 .title = "DARPA Internet",
157 .af = AF_INET,
158 .alen = 4,
159 .sprint = INET_sprint,
160 .input = INET_input,
161 };
162
163 #ifdef HAVE_AFINET6
164
165 /* Display an Internet socket address. */
166 /* dirty! struct sockaddr usually doesn't suffer for inet6 addresses, fst. */
INET6_sprint(struct sockaddr * sap,int numeric)167 static const char* FAST_FUNC INET6_sprint(struct sockaddr *sap, int numeric)
168 {
169 if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
170 return "[NONE SET]";
171 return auto_string(INET6_rresolve((struct sockaddr_in6 *) sap, numeric));
172 }
173
174 #ifdef UNUSED
INET6_getsock(char * bufp,struct sockaddr * sap)175 static int INET6_getsock(char *bufp, struct sockaddr *sap)
176 {
177 struct sockaddr_in6 *sin6;
178
179 sin6 = (struct sockaddr_in6 *) sap;
180 sin6->sin6_family = AF_INET6;
181 sin6->sin6_port = 0;
182
183 if (inet_pton(AF_INET6, bufp, sin6->sin6_addr.s6_addr) <= 0)
184 return -1;
185
186 return 16; /* ?;) */
187 }
188 #endif
189
INET6_input(const char * bufp,struct sockaddr * sap)190 static int FAST_FUNC INET6_input(/*int type,*/ const char *bufp, struct sockaddr *sap)
191 {
192 return INET6_resolve(bufp, (struct sockaddr_in6 *) sap);
193 /*
194 switch (type) {
195 case 1:
196 return (INET6_getsock(bufp, sap));
197 default:
198 return (INET6_resolve(bufp, (struct sockaddr_in6 *) sap));
199 }
200 */
201 }
202
203 static const struct aftype inet6_aftype = {
204 .name = "inet6",
205 .title = "IPv6",
206 .af = AF_INET6,
207 .alen = sizeof(struct in6_addr),
208 .sprint = INET6_sprint,
209 .input = INET6_input,
210 };
211
212 #endif /* HAVE_AFINET6 */
213
214 /* Display an UNSPEC address. */
UNSPEC_print(unsigned char * ptr)215 static char* FAST_FUNC UNSPEC_print(unsigned char *ptr)
216 {
217 char *buff;
218 char *pos;
219 unsigned int i;
220
221 buff = auto_string(xmalloc(sizeof(struct sockaddr) * 3 + 1));
222 pos = buff;
223 for (i = 0; i < sizeof(struct sockaddr); i++) {
224 /* careful -- not every libc's sprintf returns # bytes written */
225 sprintf(pos, "%02X-", *ptr++);
226 pos += 3;
227 }
228 /* Erase trailing "-". Works as long as sizeof(struct sockaddr) != 0 */
229 *--pos = '\0';
230 return buff;
231 }
232
233 /* Display an UNSPEC socket address. */
UNSPEC_sprint(struct sockaddr * sap,int numeric UNUSED_PARAM)234 static const char* FAST_FUNC UNSPEC_sprint(struct sockaddr *sap, int numeric UNUSED_PARAM)
235 {
236 if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
237 return "[NONE SET]";
238 return UNSPEC_print((unsigned char *)sap->sa_data);
239 }
240
241 static const struct aftype unspec_aftype = {
242 .name = "unspec",
243 .title = "UNSPEC",
244 .af = AF_UNSPEC,
245 .alen = 0,
246 .print = UNSPEC_print,
247 .sprint = UNSPEC_sprint,
248 };
249
250 static const struct aftype *const aftypes[] = {
251 &inet_aftype,
252 #ifdef HAVE_AFINET6
253 &inet6_aftype,
254 #endif
255 &unspec_aftype,
256 NULL
257 };
258
259 /* Check our protocol family table for this family. */
get_aftype(const char * name)260 const struct aftype* FAST_FUNC get_aftype(const char *name)
261 {
262 const struct aftype *const *afp;
263
264 afp = aftypes;
265 while (*afp != NULL) {
266 if (strcmp((*afp)->name, name) == 0)
267 return (*afp);
268 afp++;
269 }
270 return NULL;
271 }
272
273 /* Check our protocol family table for this family. */
get_afntype(int af)274 static const struct aftype *get_afntype(int af)
275 {
276 const struct aftype *const *afp;
277
278 afp = aftypes;
279 while (*afp != NULL) {
280 if ((*afp)->af == af)
281 return *afp;
282 afp++;
283 }
284 return NULL;
285 }
286
287 struct user_net_device_stats {
288 unsigned long long rx_packets; /* total packets received */
289 unsigned long long tx_packets; /* total packets transmitted */
290 unsigned long long rx_bytes; /* total bytes received */
291 unsigned long long tx_bytes; /* total bytes transmitted */
292 unsigned long rx_errors; /* bad packets received */
293 unsigned long tx_errors; /* packet transmit problems */
294 unsigned long rx_dropped; /* no space in linux buffers */
295 unsigned long tx_dropped; /* no space available in linux */
296 unsigned long rx_multicast; /* multicast packets received */
297 unsigned long rx_compressed;
298 unsigned long tx_compressed;
299 unsigned long collisions;
300
301 /* detailed rx_errors: */
302 unsigned long rx_length_errors;
303 unsigned long rx_over_errors; /* receiver ring buff overflow */
304 unsigned long rx_crc_errors; /* recved pkt with crc error */
305 unsigned long rx_frame_errors; /* recv'd frame alignment error */
306 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
307 unsigned long rx_missed_errors; /* receiver missed packet */
308 /* detailed tx_errors */
309 unsigned long tx_aborted_errors;
310 unsigned long tx_carrier_errors;
311 unsigned long tx_fifo_errors;
312 unsigned long tx_heartbeat_errors;
313 unsigned long tx_window_errors;
314 };
315
316 struct interface {
317 struct interface *next, *prev;
318 char name[IFNAMSIZ]; /* interface name */
319 short type; /* if type */
320 short flags; /* various flags */
321 int tx_queue_len; /* transmit queue length */
322
323 /* these should be contiguous, zeroed in one go in if_fetch(): */
324 #define FIRST_TO_ZERO metric
325 int metric; /* routing metric */
326 int mtu; /* MTU value */
327 struct ifmap map; /* hardware setup */
328 struct sockaddr addr; /* IP address */
329 struct sockaddr dstaddr; /* P-P IP address */
330 struct sockaddr broadaddr; /* IP broadcast address */
331 struct sockaddr netmask; /* IP network mask */
332 char hwaddr[32]; /* HW address */
333 #define LAST_TO_ZERO hwaddr
334
335 smallint has_ip;
336 smallint statistics_valid;
337 struct user_net_device_stats stats; /* statistics */
338 #if 0 /* UNUSED */
339 int keepalive; /* keepalive value for SLIP */
340 int outfill; /* outfill value for SLIP */
341 #endif
342 };
343
344 struct iface_list {
345 struct interface *int_list, *int_last;
346 };
347
348
349 #if 0
350 /* like strcmp(), but knows about numbers */
351 except that the freshly added calls to xatoul() barf on ethernet aliases with
352 uClibc with e.g.: ife->name='lo' name='eth0:1'
353 static int nstrcmp(const char *a, const char *b)
354 {
355 const char *a_ptr = a;
356 const char *b_ptr = b;
357
358 while (*a == *b) {
359 if (*a == '\0') {
360 return 0;
361 }
362 if (!isdigit(*a) && isdigit(*(a+1))) {
363 a_ptr = a+1;
364 b_ptr = b+1;
365 }
366 a++;
367 b++;
368 }
369
370 if (isdigit(*a) && isdigit(*b)) {
371 return xatoul(a_ptr) > xatoul(b_ptr) ? 1 : -1;
372 }
373 return *a - *b;
374 }
375 #endif
376
add_interface(struct iface_list * ilist,char * name)377 static struct interface *add_interface(struct iface_list *ilist, char *name)
378 {
379 struct interface *ife, **nextp, *new;
380
381 for (ife = ilist->int_last; ife; ife = ife->prev) {
382 int n = /*n*/strcmp(ife->name, name);
383
384 if (n == 0)
385 return ife;
386 if (n < 0)
387 break;
388 }
389
390 new = xzalloc(sizeof(*new));
391 strncpy_IFNAMSIZ(new->name, name);
392
393 nextp = ife ? &ife->next : &ilist->int_list;
394 new->prev = ife;
395 new->next = *nextp;
396 if (new->next)
397 new->next->prev = new;
398 else
399 ilist->int_last = new;
400 *nextp = new;
401 return new;
402 }
403
get_name(char name[IFNAMSIZ],char * p)404 static char *get_name(char name[IFNAMSIZ], char *p)
405 {
406 /* Extract NAME from nul-terminated p of the form "<whitespace>NAME:"
407 * If match is not made, set NAME to "" and return unchanged p.
408 */
409 char *nameend;
410 char *namestart;
411
412 nameend = namestart = skip_whitespace(p);
413
414 for (;;) {
415 if ((nameend - namestart) >= IFNAMSIZ)
416 break; /* interface name too large - return "" */
417 if (*nameend == ':') {
418 memcpy(name, namestart, nameend - namestart);
419 name[nameend - namestart] = '\0';
420 return nameend + 1;
421 }
422 nameend++;
423 /* isspace, NUL, any control char? */
424 if ((unsigned char)*nameend <= (unsigned char)' ')
425 break; /* trailing ':' not found - return "" */
426 }
427 name[0] = '\0';
428 return p;
429 }
430
431 /* If scanf supports size qualifiers for %n conversions, then we can
432 * use a modified fmt that simply stores the position in the fields
433 * having no associated fields in the proc string. Of course, we need
434 * to zero them again when we're done. But that is smaller than the
435 * old approach of multiple scanf occurrences with large numbers of
436 * args. */
437
438 /* static const char *const ss_fmt[] = { */
439 /* "%lln%llu%lu%lu%lu%lu%ln%ln%lln%llu%lu%lu%lu%lu%lu", */
440 /* "%llu%llu%lu%lu%lu%lu%ln%ln%llu%llu%lu%lu%lu%lu%lu", */
441 /* "%llu%llu%lu%lu%lu%lu%lu%lu%llu%llu%lu%lu%lu%lu%lu%lu" */
442 /* }; */
443
444 /* We use %n for unavailable data in older versions of /proc/net/dev formats.
445 * This results in bogus stores to ife->FOO members corresponding to
446 * %n specifiers (even the size of integers may not match).
447 */
448 #if INT_MAX == LONG_MAX
449 static const char *const ss_fmt[] = {
450 "%n%llu%u%u%u%u%n%n%n%llu%u%u%u%u%u",
451 "%llu%llu%u%u%u%u%n%n%llu%llu%u%u%u%u%u",
452 "%llu%llu%u%u%u%u%u%u%llu%llu%u%u%u%u%u%u"
453 };
454 #else
455 static const char *const ss_fmt[] = {
456 "%n%llu%lu%lu%lu%lu%n%n%n%llu%lu%lu%lu%lu%lu",
457 "%llu%llu%lu%lu%lu%lu%n%n%llu%llu%lu%lu%lu%lu%lu",
458 "%llu%llu%lu%lu%lu%lu%lu%lu%llu%llu%lu%lu%lu%lu%lu%lu"
459 };
460 #endif
461
get_dev_fields(char * bp,struct interface * ife,int procnetdev_vsn)462 static void get_dev_fields(char *bp, struct interface *ife, int procnetdev_vsn)
463 {
464 memset(&ife->stats, 0, sizeof(struct user_net_device_stats));
465
466 sscanf(bp, ss_fmt[procnetdev_vsn],
467 &ife->stats.rx_bytes, /* missing for v0 */
468 &ife->stats.rx_packets,
469 &ife->stats.rx_errors,
470 &ife->stats.rx_dropped,
471 &ife->stats.rx_fifo_errors,
472 &ife->stats.rx_frame_errors,
473 &ife->stats.rx_compressed, /* missing for v0, v1 */
474 &ife->stats.rx_multicast, /* missing for v0, v1 */
475 &ife->stats.tx_bytes, /* missing for v0 */
476 &ife->stats.tx_packets,
477 &ife->stats.tx_errors,
478 &ife->stats.tx_dropped,
479 &ife->stats.tx_fifo_errors,
480 &ife->stats.collisions,
481 &ife->stats.tx_carrier_errors,
482 &ife->stats.tx_compressed /* missing for v0, v1 */
483 );
484
485 if (procnetdev_vsn <= 1) {
486 if (procnetdev_vsn == 0) {
487 ife->stats.rx_bytes = 0;
488 ife->stats.tx_bytes = 0;
489 }
490 ife->stats.rx_multicast = 0;
491 ife->stats.rx_compressed = 0;
492 ife->stats.tx_compressed = 0;
493 }
494 }
495
procnetdev_version(char * buf)496 static int procnetdev_version(char *buf)
497 {
498 if (strstr(buf, "compressed"))
499 return 2;
500 if (strstr(buf, "bytes"))
501 return 1;
502 return 0;
503 }
504
if_readconf(struct iface_list * ilist)505 static void if_readconf(struct iface_list *ilist)
506 {
507 int numreqs = 30;
508 struct ifconf ifc;
509 struct ifreq *ifr;
510 int n;
511 int skfd;
512
513 ifc.ifc_buf = NULL;
514
515 /* SIOCGIFCONF currently seems to only work properly on AF_INET sockets
516 (as of 2.1.128) */
517 skfd = xsocket(AF_INET, SOCK_DGRAM, 0);
518
519 for (;;) {
520 ifc.ifc_len = sizeof(struct ifreq) * numreqs;
521 ifc.ifc_buf = xrealloc(ifc.ifc_buf, ifc.ifc_len);
522
523 xioctl(skfd, SIOCGIFCONF, &ifc);
524 if (ifc.ifc_len == (int)(sizeof(struct ifreq) * numreqs)) {
525 /* assume it overflowed and try again */
526 numreqs += 10;
527 continue;
528 }
529 break;
530 }
531
532 ifr = ifc.ifc_req;
533 for (n = 0; n < ifc.ifc_len; n += sizeof(struct ifreq)) {
534 add_interface(ilist, ifr->ifr_name);
535 ifr++;
536 }
537
538 close(skfd);
539 free(ifc.ifc_buf);
540 }
541
if_readlist_proc(struct iface_list * ilist,char * ifname)542 static int if_readlist_proc(struct iface_list *ilist, char *ifname)
543 {
544 FILE *fh;
545 char buf[512];
546 struct interface *ife;
547 int procnetdev_vsn;
548 int ret;
549
550 fh = fopen_or_warn(_PATH_PROCNET_DEV, "r");
551 if (!fh) {
552 return 0; /* "not found" */
553 }
554 fgets(buf, sizeof buf, fh); /* eat line */
555 fgets(buf, sizeof buf, fh);
556
557 procnetdev_vsn = procnetdev_version(buf);
558
559 ret = 0;
560 while (fgets(buf, sizeof buf, fh)) {
561 char *s, name[IFNAMSIZ];
562
563 s = get_name(name, buf);
564 ife = add_interface(ilist, name);
565 get_dev_fields(s, ife, procnetdev_vsn);
566 ife->statistics_valid = 1;
567 if (ifname && strcmp(ifname, name) == 0) {
568 ret = 1; /* found */
569 break;
570 }
571 }
572 fclose(fh);
573 return ret;
574 }
575
if_readlist(struct iface_list * ilist,char * ifname)576 static void if_readlist(struct iface_list *ilist, char *ifname)
577 {
578 int found = if_readlist_proc(ilist, ifname);
579 /* Needed in order to get ethN:M aliases */
580 if (!found)
581 if_readconf(ilist);
582 }
583
584 /* Fetch the interface configuration from the kernel. */
if_fetch(struct interface * ife)585 static int if_fetch(struct interface *ife)
586 {
587 struct ifreq ifr;
588 char *ifname = ife->name;
589 int skfd;
590
591 skfd = xsocket(AF_INET, SOCK_DGRAM, 0);
592
593 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
594 if (ioctl(skfd, SIOCGIFFLAGS, &ifr) < 0) {
595 close(skfd);
596 return -1;
597 }
598 ife->flags = ifr.ifr_flags;
599
600 /* set up default values if ioctl's would fail */
601 ife->tx_queue_len = -1; /* unknown value */
602 memset(&ife->FIRST_TO_ZERO, 0,
603 offsetof(struct interface, LAST_TO_ZERO)
604 - offsetof(struct interface, FIRST_TO_ZERO)
605 + sizeof(ife->LAST_TO_ZERO)
606 );
607
608 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
609 if (ioctl(skfd, SIOCGIFHWADDR, &ifr) >= 0)
610 memcpy(ife->hwaddr, ifr.ifr_hwaddr.sa_data, 8);
611
612 //er.... why this _isnt_ inside if()?
613 ife->type = ifr.ifr_hwaddr.sa_family;
614
615 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
616 if (ioctl(skfd, SIOCGIFMETRIC, &ifr) >= 0)
617 ife->metric = ifr.ifr_metric;
618
619 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
620 if (ioctl(skfd, SIOCGIFMTU, &ifr) >= 0)
621 ife->mtu = ifr.ifr_mtu;
622
623 #ifdef SIOCGIFMAP
624 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
625 if (ioctl(skfd, SIOCGIFMAP, &ifr) == 0)
626 ife->map = ifr.ifr_map;
627 #endif
628
629 #ifdef HAVE_TXQUEUELEN
630 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
631 if (ioctl(skfd, SIOCGIFTXQLEN, &ifr) >= 0)
632 ife->tx_queue_len = ifr.ifr_qlen;
633 #endif
634
635 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
636 ifr.ifr_addr.sa_family = AF_INET;
637 if (ioctl(skfd, SIOCGIFADDR, &ifr) == 0) {
638 ife->has_ip = 1;
639 ife->addr = ifr.ifr_addr;
640 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
641 if (ioctl(skfd, SIOCGIFDSTADDR, &ifr) >= 0)
642 ife->dstaddr = ifr.ifr_dstaddr;
643
644 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
645 if (ioctl(skfd, SIOCGIFBRDADDR, &ifr) >= 0)
646 ife->broadaddr = ifr.ifr_broadaddr;
647
648 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
649 if (ioctl(skfd, SIOCGIFNETMASK, &ifr) >= 0)
650 ife->netmask = ifr.ifr_netmask;
651 }
652
653 close(skfd);
654 return 0;
655 }
656
do_if_fetch(struct interface * ife)657 static int do_if_fetch(struct interface *ife)
658 {
659 if (if_fetch(ife) < 0) {
660 const char *errmsg;
661
662 if (errno == ENODEV) {
663 /* Give better error message for this case. */
664 errmsg = "Device not found";
665 } else {
666 errmsg = strerror(errno);
667 }
668 bb_error_msg("%s: error fetching interface information: %s",
669 ife->name, errmsg);
670 return -1;
671 }
672 return 0;
673 }
674
675 static const struct hwtype unspec_hwtype = {
676 .name = "unspec",
677 .title = "UNSPEC",
678 .type = -1,
679 .print = UNSPEC_print
680 };
681
682 static const struct hwtype loop_hwtype = {
683 .name = "loop",
684 .title = "Local Loopback",
685 .type = ARPHRD_LOOPBACK
686 };
687
688 /* Display an Ethernet address in readable format. */
ether_print(unsigned char * ptr)689 static char* FAST_FUNC ether_print(unsigned char *ptr)
690 {
691 char *buff;
692 buff = xasprintf("%02X:%02X:%02X:%02X:%02X:%02X",
693 ptr[0], ptr[1], ptr[2], ptr[3], ptr[4], ptr[5]
694 );
695 return auto_string(buff);
696 }
697
698 static const struct hwtype ether_hwtype = {
699 .name = "ether",
700 .title = "Ethernet",
701 .type = ARPHRD_ETHER,
702 .alen = ETH_ALEN,
703 .print = ether_print,
704 .input = in_ether
705 };
706
707 static const struct hwtype ppp_hwtype = {
708 .name = "ppp",
709 .title = "Point-to-Point Protocol",
710 .type = ARPHRD_PPP
711 };
712
713 #if ENABLE_FEATURE_IPV6
714 static const struct hwtype sit_hwtype = {
715 .name = "sit",
716 .title = "IPv6-in-IPv4",
717 .type = ARPHRD_SIT,
718 .print = UNSPEC_print,
719 .suppress_null_addr = 1
720 };
721 #endif
722 #if ENABLE_FEATURE_HWIB
723 static const struct hwtype ib_hwtype = {
724 .name = "infiniband",
725 .title = "InfiniBand",
726 .type = ARPHRD_INFINIBAND,
727 .alen = INFINIBAND_ALEN,
728 .print = UNSPEC_print,
729 .input = in_ib,
730 };
731 #endif
732
733
734 static const struct hwtype *const hwtypes[] = {
735 &loop_hwtype,
736 ðer_hwtype,
737 &ppp_hwtype,
738 &unspec_hwtype,
739 #if ENABLE_FEATURE_IPV6
740 &sit_hwtype,
741 #endif
742 #if ENABLE_FEATURE_HWIB
743 &ib_hwtype,
744 #endif
745 NULL
746 };
747
748 #ifdef IFF_PORTSEL
749 static const char *const if_port_text[] ALIGN_PTR = {
750 /* Keep in step with <linux/netdevice.h> */
751 "unknown",
752 "10base2",
753 "10baseT",
754 "AUI",
755 "100baseT",
756 "100baseTX",
757 "100baseFX",
758 NULL
759 };
760 #endif
761
762 /* Check our hardware type table for this type. */
get_hwtype(const char * name)763 const struct hwtype* FAST_FUNC get_hwtype(const char *name)
764 {
765 const struct hwtype *const *hwp;
766
767 hwp = hwtypes;
768 while (*hwp != NULL) {
769 if (strcmp((*hwp)->name, name) == 0)
770 return (*hwp);
771 hwp++;
772 }
773 return NULL;
774 }
775
776 /* Check our hardware type table for this type. */
get_hwntype(int type)777 const struct hwtype* FAST_FUNC get_hwntype(int type)
778 {
779 const struct hwtype *const *hwp;
780
781 hwp = hwtypes;
782 while (*hwp != NULL) {
783 if ((*hwp)->type == type)
784 return *hwp;
785 hwp++;
786 }
787 return NULL;
788 }
789
790 /* return 1 if address is all zeros */
hw_null_address(const struct hwtype * hw,void * ap)791 static int hw_null_address(const struct hwtype *hw, void *ap)
792 {
793 int i;
794 unsigned char *address = (unsigned char *) ap;
795
796 for (i = 0; i < hw->alen; i++)
797 if (address[i])
798 return 0;
799 return 1;
800 }
801
802 static const char TRext[] ALIGN1 = "\0\0\0Ki\0Mi\0Gi\0Ti";
803
print_bytes_scaled(unsigned long long ull,const char * end)804 static void print_bytes_scaled(unsigned long long ull, const char *end)
805 {
806 unsigned long long int_part;
807 const char *ext;
808 unsigned int frac_part;
809 int i;
810
811 frac_part = 0;
812 ext = TRext;
813 int_part = ull;
814 i = 4;
815 do {
816 if (int_part >= 1024) {
817 frac_part = ((((unsigned int) int_part) & (1024-1)) * 10) / 1024;
818 int_part /= 1024;
819 ext += 3; /* KiB, MiB, GiB, TiB */
820 }
821 --i;
822 } while (i);
823
824 printf("X bytes:%llu (%llu.%u %sB)%s", ull, int_part, frac_part, ext, end);
825 }
826
827
828 #ifdef HAVE_AFINET6
829 #define IPV6_ADDR_ANY 0x0000U
830
831 #define IPV6_ADDR_UNICAST 0x0001U
832 #define IPV6_ADDR_MULTICAST 0x0002U
833 #define IPV6_ADDR_ANYCAST 0x0004U
834
835 #define IPV6_ADDR_LOOPBACK 0x0010U
836 #define IPV6_ADDR_LINKLOCAL 0x0020U
837 #define IPV6_ADDR_SITELOCAL 0x0040U
838
839 #define IPV6_ADDR_COMPATv4 0x0080U
840
841 #define IPV6_ADDR_SCOPE_MASK 0x00f0U
842
843 #define IPV6_ADDR_MAPPED 0x1000U
844 #define IPV6_ADDR_RESERVED 0x2000U /* reserved address space */
845
846
ife_print6(struct interface * ptr)847 static void ife_print6(struct interface *ptr)
848 {
849 FILE *f;
850 char addr6[40], devname[21];
851 struct sockaddr_in6 sap;
852 int plen, scope, dad_status, if_idx;
853 char addr6p[8][5];
854
855 f = fopen_for_read(_PATH_PROCNET_IFINET6);
856 if (f == NULL)
857 return;
858
859 while (fscanf
860 (f, "%4s%4s%4s%4s%4s%4s%4s%4s %08x %02x %02x %02x %20s\n",
861 addr6p[0], addr6p[1], addr6p[2], addr6p[3], addr6p[4],
862 addr6p[5], addr6p[6], addr6p[7], &if_idx, &plen, &scope,
863 &dad_status, devname) != EOF
864 ) {
865 if (strcmp(devname, ptr->name) == 0) {
866 sprintf(addr6, "%s:%s:%s:%s:%s:%s:%s:%s",
867 addr6p[0], addr6p[1], addr6p[2], addr6p[3],
868 addr6p[4], addr6p[5], addr6p[6], addr6p[7]);
869 memset(&sap, 0, sizeof(sap));
870 inet_pton(AF_INET6, addr6,
871 (struct sockaddr *) &sap.sin6_addr);
872 sap.sin6_family = AF_INET6;
873 printf(" inet6 addr: %s/%d",
874 INET6_sprint((struct sockaddr *) &sap, 1),
875 plen);
876 printf(" Scope:");
877 switch (scope & IPV6_ADDR_SCOPE_MASK) {
878 case 0:
879 puts("Global");
880 break;
881 case IPV6_ADDR_LINKLOCAL:
882 puts("Link");
883 break;
884 case IPV6_ADDR_SITELOCAL:
885 puts("Site");
886 break;
887 case IPV6_ADDR_COMPATv4:
888 puts("Compat");
889 break;
890 case IPV6_ADDR_LOOPBACK:
891 puts("Host");
892 break;
893 default:
894 puts("Unknown");
895 }
896 }
897 }
898 fclose(f);
899 }
900 #else
901 #define ife_print6(a) ((void)0)
902 #endif
903
ife_print(struct interface * ptr)904 static void ife_print(struct interface *ptr)
905 {
906 const struct aftype *ap;
907 const struct hwtype *hw;
908 int hf;
909 int can_compress = 0;
910
911 ap = get_afntype(ptr->addr.sa_family);
912 if (ap == NULL)
913 ap = get_afntype(0);
914
915 hf = ptr->type;
916
917 if (hf == ARPHRD_CSLIP || hf == ARPHRD_CSLIP6)
918 can_compress = 1;
919
920 hw = get_hwntype(hf);
921 if (hw == NULL)
922 hw = get_hwntype(-1);
923
924 printf("%-9s Link encap:%s ", ptr->name, hw->title);
925 /* For some hardware types (eg Ash, ATM) we don't print the
926 hardware address if it's null. */
927 if (hw->print != NULL
928 && !(hw_null_address(hw, ptr->hwaddr) && hw->suppress_null_addr)
929 ) {
930 printf("HWaddr %s ", hw->print((unsigned char *)ptr->hwaddr));
931 }
932 #ifdef IFF_PORTSEL
933 if (ptr->flags & IFF_PORTSEL) {
934 printf("Media:%s", if_port_text[ptr->map.port] /* [0] */);
935 if (ptr->flags & IFF_AUTOMEDIA)
936 printf("(auto)");
937 }
938 #endif
939 bb_putchar('\n');
940
941 if (ptr->has_ip) {
942 printf(" %s addr:%s ", ap->name,
943 ap->sprint(&ptr->addr, 1));
944 if (ptr->flags & IFF_POINTOPOINT) {
945 printf(" P-t-P:%s ", ap->sprint(&ptr->dstaddr, 1));
946 }
947 if (ptr->flags & IFF_BROADCAST) {
948 printf(" Bcast:%s ", ap->sprint(&ptr->broadaddr, 1));
949 }
950 printf(" Mask:%s\n", ap->sprint(&ptr->netmask, 1));
951 }
952
953 ife_print6(ptr);
954
955 printf(" ");
956 /* DONT FORGET TO ADD THE FLAGS IN ife_print_short, too */
957
958 if (ptr->flags == 0) {
959 printf("[NO FLAGS] ");
960 } else {
961 static const char ife_print_flags_strs[] ALIGN1 =
962 "UP\0"
963 "BROADCAST\0"
964 "DEBUG\0"
965 "LOOPBACK\0"
966 "POINTOPOINT\0"
967 "NOTRAILERS\0"
968 "RUNNING\0"
969 "NOARP\0"
970 "PROMISC\0"
971 "ALLMULTI\0"
972 "SLAVE\0"
973 "MASTER\0"
974 "MULTICAST\0"
975 #ifdef HAVE_DYNAMIC
976 "DYNAMIC\0"
977 #endif
978 ;
979 static const unsigned short ife_print_flags_mask[] ALIGN2 = {
980 IFF_UP,
981 IFF_BROADCAST,
982 IFF_DEBUG,
983 IFF_LOOPBACK,
984 IFF_POINTOPOINT,
985 IFF_NOTRAILERS,
986 IFF_RUNNING,
987 IFF_NOARP,
988 IFF_PROMISC,
989 IFF_ALLMULTI,
990 IFF_SLAVE,
991 IFF_MASTER,
992 IFF_MULTICAST
993 #ifdef HAVE_DYNAMIC
994 ,IFF_DYNAMIC
995 #endif
996 };
997 const unsigned short *mask = ife_print_flags_mask;
998 const char *str = ife_print_flags_strs;
999 do {
1000 if (ptr->flags & *mask) {
1001 printf("%s ", str);
1002 }
1003 mask++;
1004 str += strlen(str) + 1;
1005 } while (*str);
1006 }
1007
1008 /* DONT FORGET TO ADD THE FLAGS IN ife_print_short */
1009 printf(" MTU:%d Metric:%d", ptr->mtu, ptr->metric ? ptr->metric : 1);
1010 #if 0
1011 #ifdef SIOCSKEEPALIVE
1012 if (ptr->outfill || ptr->keepalive)
1013 printf(" Outfill:%d Keepalive:%d", ptr->outfill, ptr->keepalive);
1014 #endif
1015 #endif
1016 bb_putchar('\n');
1017
1018 /* If needed, display the interface statistics. */
1019
1020 if (ptr->statistics_valid) {
1021 /* XXX: statistics are currently only printed for the primary address,
1022 * not for the aliases, although strictly speaking they're shared
1023 * by all addresses.
1024 */
1025 printf(" ");
1026
1027 printf("RX packets:%llu errors:%lu dropped:%lu overruns:%lu frame:%lu\n",
1028 ptr->stats.rx_packets, ptr->stats.rx_errors,
1029 ptr->stats.rx_dropped, ptr->stats.rx_fifo_errors,
1030 ptr->stats.rx_frame_errors);
1031 if (can_compress)
1032 printf(" compressed:%lu\n",
1033 ptr->stats.rx_compressed);
1034 printf(" ");
1035 printf("TX packets:%llu errors:%lu dropped:%lu overruns:%lu carrier:%lu\n",
1036 ptr->stats.tx_packets, ptr->stats.tx_errors,
1037 ptr->stats.tx_dropped, ptr->stats.tx_fifo_errors,
1038 ptr->stats.tx_carrier_errors);
1039 printf(" collisions:%lu ", ptr->stats.collisions);
1040 if (can_compress)
1041 printf("compressed:%lu ", ptr->stats.tx_compressed);
1042 if (ptr->tx_queue_len != -1)
1043 printf("txqueuelen:%d ", ptr->tx_queue_len);
1044 printf("\n R");
1045 print_bytes_scaled(ptr->stats.rx_bytes, " T");
1046 print_bytes_scaled(ptr->stats.tx_bytes, "\n");
1047 }
1048
1049 if (ptr->map.irq || ptr->map.mem_start
1050 || ptr->map.dma || ptr->map.base_addr
1051 ) {
1052 printf(" ");
1053 if (ptr->map.irq)
1054 printf("Interrupt:%d ", ptr->map.irq);
1055 if (ptr->map.base_addr >= 0x100) /* Only print devices using it for I/O maps */
1056 printf("Base address:0x%lx ",
1057 (unsigned long) ptr->map.base_addr);
1058 if (ptr->map.mem_start) {
1059 printf("Memory:%lx-%lx ", ptr->map.mem_start,
1060 ptr->map.mem_end);
1061 }
1062 if (ptr->map.dma)
1063 printf("DMA chan:%x ", ptr->map.dma);
1064 bb_putchar('\n');
1065 }
1066 bb_putchar('\n');
1067 }
1068
do_if_print(struct interface * ife,int show_downed_too)1069 static int do_if_print(struct interface *ife, int show_downed_too)
1070 {
1071 int res;
1072
1073 res = do_if_fetch(ife);
1074 if (res >= 0) {
1075 if ((ife->flags & IFF_UP) || show_downed_too)
1076 ife_print(ife);
1077 }
1078 return res;
1079 }
1080
display_interfaces(char * ifname)1081 int FAST_FUNC display_interfaces(char *ifname)
1082 {
1083 struct interface *ife;
1084 int res;
1085 struct iface_list ilist;
1086
1087 ilist.int_list = NULL;
1088 ilist.int_last = NULL;
1089 if_readlist(&ilist, ifname != IFNAME_SHOW_DOWNED_TOO ? ifname : NULL);
1090
1091 if (!ifname || ifname == IFNAME_SHOW_DOWNED_TOO) {
1092 for (ife = ilist.int_list; ife; ife = ife->next) {
1093
1094 BUILD_BUG_ON((int)(intptr_t)IFNAME_SHOW_DOWNED_TOO != 1);
1095
1096 res = do_if_print(ife, (int)(intptr_t)ifname);
1097 if (res < 0)
1098 goto ret;
1099 }
1100 return 0;
1101 }
1102
1103 ife = add_interface(&ilist, ifname);
1104 res = do_if_print(ife, /*show_downed_too:*/ 1);
1105 ret:
1106 return (res < 0); /* status < 0 == 1 -- error */
1107 }
1108
1109 #if ENABLE_FEATURE_HWIB
1110 /* Input an Infiniband address and convert to binary. */
in_ib(const char * bufp,struct sockaddr * sap)1111 int FAST_FUNC in_ib(const char *bufp, struct sockaddr *sap)
1112 {
1113 sap->sa_family = ib_hwtype.type;
1114 //TODO: error check?
1115 hex2bin((char*)sap->sa_data, bufp, INFINIBAND_ALEN);
1116 # ifdef HWIB_DEBUG
1117 fprintf(stderr, "in_ib(%s): %s\n", bufp, UNSPEC_print(sap->sa_data));
1118 # endif
1119 return 0;
1120 }
1121 #endif
1122