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path: root/networking/interface.c (plain)
blob: 8e95d942ab19f5aa8b5f18dfc14644c79d98a491
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#if defined(HAVE_AFINET6) && !defined(BIONIC_L)
58# ifndef _LINUX_IN6_H
59/*
60 * This is from linux/include/net/ipv6.h
61 */
62struct 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. */
90static const char* FAST_FUNC INET_sprint(struct sockaddr *sap, int numeric)
91{
92 static char *buff; /* defaults to NULL */
93
94 free(buff);
95 if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
96 return "[NONE SET]";
97 buff = INET_rresolve((struct sockaddr_in *) sap, numeric, 0xffffff00);
98 return buff;
99}
100
101#ifdef UNUSED_AND_BUGGY
102static int INET_getsock(char *bufp, struct sockaddr *sap)
103{
104 char *sp = bufp, *bp;
105 unsigned int i;
106 unsigned val;
107 struct sockaddr_in *sock_in;
108
109 sock_in = (struct sockaddr_in *) sap;
110 sock_in->sin_family = AF_INET;
111 sock_in->sin_port = 0;
112
113 val = 0;
114 bp = (char *) &val;
115 for (i = 0; i < sizeof(sock_in->sin_addr.s_addr); i++) {
116 *sp = toupper(*sp);
117
118 if ((unsigned)(*sp - 'A') <= 5)
119 bp[i] |= (int) (*sp - ('A' - 10));
120 else if (isdigit(*sp))
121 bp[i] |= (int) (*sp - '0');
122 else
123 return -1;
124
125 bp[i] <<= 4;
126 sp++;
127 *sp = toupper(*sp);
128
129 if ((unsigned)(*sp - 'A') <= 5)
130 bp[i] |= (int) (*sp - ('A' - 10));
131 else if (isdigit(*sp))
132 bp[i] |= (int) (*sp - '0');
133 else
134 return -1;
135
136 sp++;
137 }
138 sock_in->sin_addr.s_addr = htonl(val);
139
140 return (sp - bufp);
141}
142#endif
143
144static int FAST_FUNC INET_input(/*int type,*/ const char *bufp, struct sockaddr *sap)
145{
146 return INET_resolve(bufp, (struct sockaddr_in *) sap, 0);
147/*
148 switch (type) {
149 case 1:
150 return (INET_getsock(bufp, sap));
151 case 256:
152 return (INET_resolve(bufp, (struct sockaddr_in *) sap, 1));
153 default:
154 return (INET_resolve(bufp, (struct sockaddr_in *) sap, 0));
155 }
156*/
157}
158
159static const struct aftype inet_aftype = {
160 .name = "inet",
161 .title = "DARPA Internet",
162 .af = AF_INET,
163 .alen = 4,
164 .sprint = INET_sprint,
165 .input = INET_input,
166};
167
168#ifdef HAVE_AFINET6
169
170/* Display an Internet socket address. */
171/* dirty! struct sockaddr usually doesn't suffer for inet6 addresses, fst. */
172static const char* FAST_FUNC INET6_sprint(struct sockaddr *sap, int numeric)
173{
174 static char *buff;
175
176 free(buff);
177 if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
178 return "[NONE SET]";
179 buff = INET6_rresolve((struct sockaddr_in6 *) sap, numeric);
180 return buff;
181}
182
183#ifdef UNUSED
184static int INET6_getsock(char *bufp, struct sockaddr *sap)
185{
186 struct sockaddr_in6 *sin6;
187
188 sin6 = (struct sockaddr_in6 *) sap;
189 sin6->sin6_family = AF_INET6;
190 sin6->sin6_port = 0;
191
192 if (inet_pton(AF_INET6, bufp, sin6->sin6_addr.s6_addr) <= 0)
193 return -1;
194
195 return 16; /* ?;) */
196}
197#endif
198
199static int FAST_FUNC INET6_input(/*int type,*/ const char *bufp, struct sockaddr *sap)
200{
201 return INET6_resolve(bufp, (struct sockaddr_in6 *) sap);
202/*
203 switch (type) {
204 case 1:
205 return (INET6_getsock(bufp, sap));
206 default:
207 return (INET6_resolve(bufp, (struct sockaddr_in6 *) sap));
208 }
209*/
210}
211
212static const struct aftype inet6_aftype = {
213 .name = "inet6",
214 .title = "IPv6",
215 .af = AF_INET6,
216 .alen = sizeof(struct in6_addr),
217 .sprint = INET6_sprint,
218 .input = INET6_input,
219};
220
221#endif /* HAVE_AFINET6 */
222
223/* Display an UNSPEC address. */
224static char* FAST_FUNC UNSPEC_print(unsigned char *ptr)
225{
226 static char *buff;
227
228 char *pos;
229 unsigned int i;
230
231 if (!buff)
232 buff = xmalloc(sizeof(struct sockaddr) * 3 + 1);
233 pos = buff;
234 for (i = 0; i < sizeof(struct sockaddr); i++) {
235 /* careful -- not every libc's sprintf returns # bytes written */
236 sprintf(pos, "%02X-", (*ptr++ & 0377));
237 pos += 3;
238 }
239 /* Erase trailing "-". Works as long as sizeof(struct sockaddr) != 0 */
240 *--pos = '\0';
241 return buff;
242}
243
244/* Display an UNSPEC socket address. */
245static const char* FAST_FUNC UNSPEC_sprint(struct sockaddr *sap, int numeric UNUSED_PARAM)
246{
247 if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
248 return "[NONE SET]";
249 return UNSPEC_print((unsigned char *)sap->sa_data);
250}
251
252static const struct aftype unspec_aftype = {
253 .name = "unspec",
254 .title = "UNSPEC",
255 .af = AF_UNSPEC,
256 .alen = 0,
257 .print = UNSPEC_print,
258 .sprint = UNSPEC_sprint,
259};
260
261static const struct aftype *const aftypes[] = {
262 &inet_aftype,
263#ifdef HAVE_AFINET6
264 &inet6_aftype,
265#endif
266 &unspec_aftype,
267 NULL
268};
269
270/* Check our protocol family table for this family. */
271const struct aftype* FAST_FUNC get_aftype(const char *name)
272{
273 const struct aftype *const *afp;
274
275 afp = aftypes;
276 while (*afp != NULL) {
277 if (!strcmp((*afp)->name, name))
278 return (*afp);
279 afp++;
280 }
281 return NULL;
282}
283
284/* Check our protocol family table for this family. */
285static const struct aftype *get_afntype(int af)
286{
287 const struct aftype *const *afp;
288
289 afp = aftypes;
290 while (*afp != NULL) {
291 if ((*afp)->af == af)
292 return *afp;
293 afp++;
294 }
295 return NULL;
296}
297
298struct user_net_device_stats {
299 unsigned long long rx_packets; /* total packets received */
300 unsigned long long tx_packets; /* total packets transmitted */
301 unsigned long long rx_bytes; /* total bytes received */
302 unsigned long long tx_bytes; /* total bytes transmitted */
303 unsigned long rx_errors; /* bad packets received */
304 unsigned long tx_errors; /* packet transmit problems */
305 unsigned long rx_dropped; /* no space in linux buffers */
306 unsigned long tx_dropped; /* no space available in linux */
307 unsigned long rx_multicast; /* multicast packets received */
308 unsigned long rx_compressed;
309 unsigned long tx_compressed;
310 unsigned long collisions;
311
312 /* detailed rx_errors: */
313 unsigned long rx_length_errors;
314 unsigned long rx_over_errors; /* receiver ring buff overflow */
315 unsigned long rx_crc_errors; /* recved pkt with crc error */
316 unsigned long rx_frame_errors; /* recv'd frame alignment error */
317 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
318 unsigned long rx_missed_errors; /* receiver missed packet */
319 /* detailed tx_errors */
320 unsigned long tx_aborted_errors;
321 unsigned long tx_carrier_errors;
322 unsigned long tx_fifo_errors;
323 unsigned long tx_heartbeat_errors;
324 unsigned long tx_window_errors;
325};
326
327struct interface {
328 struct interface *next, *prev;
329 char name[IFNAMSIZ]; /* interface name */
330 short type; /* if type */
331 short flags; /* various flags */
332 int metric; /* routing metric */
333 int mtu; /* MTU value */
334 int tx_queue_len; /* transmit queue length */
335 struct ifmap map; /* hardware setup */
336 struct sockaddr addr; /* IP address */
337 struct sockaddr dstaddr; /* P-P IP address */
338 struct sockaddr broadaddr; /* IP broadcast address */
339 struct sockaddr netmask; /* IP network mask */
340 int has_ip;
341 char hwaddr[32]; /* HW address */
342 int statistics_valid;
343 struct user_net_device_stats stats; /* statistics */
344 int keepalive; /* keepalive value for SLIP */
345 int outfill; /* outfill value for SLIP */
346};
347
348
349smallint interface_opt_a; /* show all interfaces */
350
351static struct interface *int_list, *int_last;
352
353
354#if 0
355/* like strcmp(), but knows about numbers */
356except that the freshly added calls to xatoul() brf on ethernet aliases with
357uClibc with e.g.: ife->name='lo' name='eth0:1'
358static int nstrcmp(const char *a, const char *b)
359{
360 const char *a_ptr = a;
361 const char *b_ptr = b;
362
363 while (*a == *b) {
364 if (*a == '\0') {
365 return 0;
366 }
367 if (!isdigit(*a) && isdigit(*(a+1))) {
368 a_ptr = a+1;
369 b_ptr = b+1;
370 }
371 a++;
372 b++;
373 }
374
375 if (isdigit(*a) && isdigit(*b)) {
376 return xatoul(a_ptr) > xatoul(b_ptr) ? 1 : -1;
377 }
378 return *a - *b;
379}
380#endif
381
382static struct interface *add_interface(char *name)
383{
384 struct interface *ife, **nextp, *new;
385
386 for (ife = int_last; ife; ife = ife->prev) {
387 int n = /*n*/strcmp(ife->name, name);
388
389 if (n == 0)
390 return ife;
391 if (n < 0)
392 break;
393 }
394
395 new = xzalloc(sizeof(*new));
396 strncpy_IFNAMSIZ(new->name, name);
397 nextp = ife ? &ife->next : &int_list;
398 new->prev = ife;
399 new->next = *nextp;
400 if (new->next)
401 new->next->prev = new;
402 else
403 int_last = new;
404 *nextp = new;
405 return new;
406}
407
408static char *get_name(char *name, char *p)
409{
410 /* Extract <name> from nul-terminated p where p matches
411 * <name>: after leading whitespace.
412 * If match is not made, set name empty and return unchanged p
413 */
414 char *nameend;
415 char *namestart = skip_whitespace(p);
416
417 nameend = namestart;
418 while (*nameend && *nameend != ':' && !isspace(*nameend))
419 nameend++;
420 if (*nameend == ':') {
421 if ((nameend - namestart) < IFNAMSIZ) {
422 memcpy(name, namestart, nameend - namestart);
423 name[nameend - namestart] = '\0';
424 p = nameend;
425 } else {
426 /* Interface name too large */
427 name[0] = '\0';
428 }
429 } else {
430 /* trailing ':' not found - return empty */
431 name[0] = '\0';
432 }
433 return p + 1;
434}
435
436/* If scanf supports size qualifiers for %n conversions, then we can
437 * use a modified fmt that simply stores the position in the fields
438 * having no associated fields in the proc string. Of course, we need
439 * to zero them again when we're done. But that is smaller than the
440 * old approach of multiple scanf occurrences with large numbers of
441 * args. */
442
443/* static const char *const ss_fmt[] = { */
444/* "%lln%llu%lu%lu%lu%lu%ln%ln%lln%llu%lu%lu%lu%lu%lu", */
445/* "%llu%llu%lu%lu%lu%lu%ln%ln%llu%llu%lu%lu%lu%lu%lu", */
446/* "%llu%llu%lu%lu%lu%lu%lu%lu%llu%llu%lu%lu%lu%lu%lu%lu" */
447/* }; */
448
449 /* Lie about the size of the int pointed to for %n. */
450#if INT_MAX == LONG_MAX
451static const char *const ss_fmt[] = {
452 "%n%llu%u%u%u%u%n%n%n%llu%u%u%u%u%u",
453 "%llu%llu%u%u%u%u%n%n%llu%llu%u%u%u%u%u",
454 "%llu%llu%u%u%u%u%u%u%llu%llu%u%u%u%u%u%u"
455};
456#else
457static const char *const ss_fmt[] = {
458 "%n%llu%lu%lu%lu%lu%n%n%n%llu%lu%lu%lu%lu%lu",
459 "%llu%llu%lu%lu%lu%lu%n%n%llu%llu%lu%lu%lu%lu%lu",
460 "%llu%llu%lu%lu%lu%lu%lu%lu%llu%llu%lu%lu%lu%lu%lu%lu"
461};
462
463#endif
464
465static void get_dev_fields(char *bp, struct interface *ife, int procnetdev_vsn)
466{
467 memset(&ife->stats, 0, sizeof(struct user_net_device_stats));
468
469 sscanf(bp, ss_fmt[procnetdev_vsn],
470 &ife->stats.rx_bytes, /* missing for 0 */
471 &ife->stats.rx_packets,
472 &ife->stats.rx_errors,
473 &ife->stats.rx_dropped,
474 &ife->stats.rx_fifo_errors,
475 &ife->stats.rx_frame_errors,
476 &ife->stats.rx_compressed, /* missing for <= 1 */
477 &ife->stats.rx_multicast, /* missing for <= 1 */
478 &ife->stats.tx_bytes, /* missing for 0 */
479 &ife->stats.tx_packets,
480 &ife->stats.tx_errors,
481 &ife->stats.tx_dropped,
482 &ife->stats.tx_fifo_errors,
483 &ife->stats.collisions,
484 &ife->stats.tx_carrier_errors,
485 &ife->stats.tx_compressed /* missing for <= 1 */
486 );
487
488 if (procnetdev_vsn <= 1) {
489 if (procnetdev_vsn == 0) {
490 ife->stats.rx_bytes = 0;
491 ife->stats.tx_bytes = 0;
492 }
493 ife->stats.rx_multicast = 0;
494 ife->stats.rx_compressed = 0;
495 ife->stats.tx_compressed = 0;
496 }
497}
498
499static int procnetdev_version(char *buf)
500{
501 if (strstr(buf, "compressed"))
502 return 2;
503 if (strstr(buf, "bytes"))
504 return 1;
505 return 0;
506}
507
508static int if_readconf(void)
509{
510 int numreqs = 30;
511 struct ifconf ifc;
512 struct ifreq *ifr;
513 int n, err = -1;
514 int skfd;
515
516 ifc.ifc_buf = NULL;
517
518 /* SIOCGIFCONF currently seems to only work properly on AF_INET sockets
519 (as of 2.1.128) */
520 skfd = socket(AF_INET, SOCK_DGRAM, 0);
521 if (skfd < 0) {
522 bb_perror_msg("error: no inet socket available");
523 return -1;
524 }
525
526 for (;;) {
527 ifc.ifc_len = sizeof(struct ifreq) * numreqs;
528 ifc.ifc_buf = xrealloc(ifc.ifc_buf, ifc.ifc_len);
529
530 if (ioctl_or_warn(skfd, SIOCGIFCONF, &ifc) < 0) {
531 goto out;
532 }
533 if (ifc.ifc_len == (int)(sizeof(struct ifreq) * numreqs)) {
534 /* assume it overflowed and try again */
535 numreqs += 10;
536 continue;
537 }
538 break;
539 }
540
541 ifr = ifc.ifc_req;
542 for (n = 0; n < ifc.ifc_len; n += sizeof(struct ifreq)) {
543 add_interface(ifr->ifr_name);
544 ifr++;
545 }
546 err = 0;
547
548 out:
549 close(skfd);
550 free(ifc.ifc_buf);
551 return err;
552}
553
554static int if_readlist_proc(char *target)
555{
556 static smallint proc_read;
557
558 FILE *fh;
559 char buf[512];
560 struct interface *ife;
561 int err, procnetdev_vsn;
562
563 if (proc_read)
564 return 0;
565 if (!target)
566 proc_read = 1;
567
568 fh = fopen_or_warn(_PATH_PROCNET_DEV, "r");
569 if (!fh) {
570 return if_readconf();
571 }
572 fgets(buf, sizeof buf, fh); /* eat line */
573 fgets(buf, sizeof buf, fh);
574
575 procnetdev_vsn = procnetdev_version(buf);
576
577 err = 0;
578 while (fgets(buf, sizeof buf, fh)) {
579 char *s, name[128];
580
581 s = get_name(name, buf);
582 ife = add_interface(name);
583 get_dev_fields(s, ife, procnetdev_vsn);
584 ife->statistics_valid = 1;
585 if (target && !strcmp(target, name))
586 break;
587 }
588 if (ferror(fh)) {
589 bb_perror_msg(_PATH_PROCNET_DEV);
590 err = -1;
591 proc_read = 0;
592 }
593 fclose(fh);
594 return err;
595}
596
597static int if_readlist(void)
598{
599 int err = if_readlist_proc(NULL);
600 /* Needed in order to get ethN:M aliases */
601 if (!err)
602 err = if_readconf();
603 return err;
604}
605
606/* Fetch the interface configuration from the kernel. */
607static int if_fetch(struct interface *ife)
608{
609 struct ifreq ifr;
610 char *ifname = ife->name;
611 int skfd;
612
613 skfd = xsocket(AF_INET, SOCK_DGRAM, 0);
614
615 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
616 if (ioctl(skfd, SIOCGIFFLAGS, &ifr) < 0) {
617 close(skfd);
618 return -1;
619 }
620 ife->flags = ifr.ifr_flags;
621
622 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
623 memset(ife->hwaddr, 0, 32);
624 if (ioctl(skfd, SIOCGIFHWADDR, &ifr) >= 0)
625 memcpy(ife->hwaddr, ifr.ifr_hwaddr.sa_data, 8);
626
627 ife->type = ifr.ifr_hwaddr.sa_family;
628
629 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
630 ife->metric = 0;
631 if (ioctl(skfd, SIOCGIFMETRIC, &ifr) >= 0)
632 ife->metric = ifr.ifr_metric;
633
634 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
635 ife->mtu = 0;
636 if (ioctl(skfd, SIOCGIFMTU, &ifr) >= 0)
637 ife->mtu = ifr.ifr_mtu;
638
639 memset(&ife->map, 0, sizeof(struct ifmap));
640#ifdef SIOCGIFMAP
641 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
642 if (ioctl(skfd, SIOCGIFMAP, &ifr) == 0)
643 ife->map = ifr.ifr_map;
644#endif
645
646#ifdef HAVE_TXQUEUELEN
647 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
648 ife->tx_queue_len = -1; /* unknown value */
649 if (ioctl(skfd, SIOCGIFTXQLEN, &ifr) >= 0)
650 ife->tx_queue_len = ifr.ifr_qlen;
651#else
652 ife->tx_queue_len = -1; /* unknown value */
653#endif
654
655 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
656 ifr.ifr_addr.sa_family = AF_INET;
657 memset(&ife->addr, 0, sizeof(struct sockaddr));
658 if (ioctl(skfd, SIOCGIFADDR, &ifr) == 0) {
659 ife->has_ip = 1;
660 ife->addr = ifr.ifr_addr;
661 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
662 memset(&ife->dstaddr, 0, sizeof(struct sockaddr));
663 if (ioctl(skfd, SIOCGIFDSTADDR, &ifr) >= 0)
664 ife->dstaddr = ifr.ifr_dstaddr;
665
666 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
667 memset(&ife->broadaddr, 0, sizeof(struct sockaddr));
668 if (ioctl(skfd, SIOCGIFBRDADDR, &ifr) >= 0)
669 ife->broadaddr = ifr.ifr_broadaddr;
670
671 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
672 memset(&ife->netmask, 0, sizeof(struct sockaddr));
673 if (ioctl(skfd, SIOCGIFNETMASK, &ifr) >= 0)
674 ife->netmask = ifr.ifr_netmask;
675 }
676
677 close(skfd);
678 return 0;
679}
680
681static int do_if_fetch(struct interface *ife)
682{
683 if (if_fetch(ife) < 0) {
684 const char *errmsg;
685
686 if (errno == ENODEV) {
687 /* Give better error message for this case. */
688 errmsg = "Device not found";
689 } else {
690 errmsg = strerror(errno);
691 }
692 bb_error_msg("%s: error fetching interface information: %s",
693 ife->name, errmsg);
694 return -1;
695 }
696 return 0;
697}
698
699static const struct hwtype unspec_hwtype = {
700 .name = "unspec",
701 .title = "UNSPEC",
702 .type = -1,
703 .print = UNSPEC_print
704};
705
706static const struct hwtype loop_hwtype = {
707 .name = "loop",
708 .title = "Local Loopback",
709 .type = ARPHRD_LOOPBACK
710};
711
712/* Display an Ethernet address in readable format. */
713static char* FAST_FUNC ether_print(unsigned char *ptr)
714{
715 static char *buff;
716
717 free(buff);
718 buff = xasprintf("%02X:%02X:%02X:%02X:%02X:%02X",
719 (ptr[0] & 0377), (ptr[1] & 0377), (ptr[2] & 0377),
720 (ptr[3] & 0377), (ptr[4] & 0377), (ptr[5] & 0377)
721 );
722 return buff;
723}
724
725static const struct hwtype ether_hwtype = {
726 .name = "ether",
727 .title = "Ethernet",
728 .type = ARPHRD_ETHER,
729 .alen = ETH_ALEN,
730 .print = ether_print,
731 .input = in_ether
732};
733
734static const struct hwtype ppp_hwtype = {
735 .name = "ppp",
736 .title = "Point-to-Point Protocol",
737 .type = ARPHRD_PPP
738};
739
740#if ENABLE_FEATURE_IPV6
741static const struct hwtype sit_hwtype = {
742 .name = "sit",
743 .title = "IPv6-in-IPv4",
744 .type = ARPHRD_SIT,
745 .print = UNSPEC_print,
746 .suppress_null_addr = 1
747};
748#endif
749#if ENABLE_FEATURE_HWIB
750static const struct hwtype ib_hwtype = {
751 .name = "infiniband",
752 .title = "InfiniBand",
753 .type = ARPHRD_INFINIBAND,
754 .alen = INFINIBAND_ALEN,
755 .print = UNSPEC_print,
756 .input = in_ib,
757};
758#endif
759
760
761static const struct hwtype *const hwtypes[] = {
762 &loop_hwtype,
763 &ether_hwtype,
764 &ppp_hwtype,
765 &unspec_hwtype,
766#if ENABLE_FEATURE_IPV6
767 &sit_hwtype,
768#endif
769#if ENABLE_FEATURE_HWIB
770 &ib_hwtype,
771#endif
772 NULL
773};
774
775#ifdef IFF_PORTSEL
776static const char *const if_port_text[] = {
777 /* Keep in step with <linux/netdevice.h> */
778 "unknown",
779 "10base2",
780 "10baseT",
781 "AUI",
782 "100baseT",
783 "100baseTX",
784 "100baseFX",
785 NULL
786};
787#endif
788
789/* Check our hardware type table for this type. */
790const struct hwtype* FAST_FUNC get_hwtype(const char *name)
791{
792 const struct hwtype *const *hwp;
793
794 hwp = hwtypes;
795 while (*hwp != NULL) {
796 if (!strcmp((*hwp)->name, name))
797 return (*hwp);
798 hwp++;
799 }
800 return NULL;
801}
802
803/* Check our hardware type table for this type. */
804const struct hwtype* FAST_FUNC get_hwntype(int type)
805{
806 const struct hwtype *const *hwp;
807
808 hwp = hwtypes;
809 while (*hwp != NULL) {
810 if ((*hwp)->type == type)
811 return *hwp;
812 hwp++;
813 }
814 return NULL;
815}
816
817/* return 1 if address is all zeros */
818static int hw_null_address(const struct hwtype *hw, void *ap)
819{
820 int i;
821 unsigned char *address = (unsigned char *) ap;
822
823 for (i = 0; i < hw->alen; i++)
824 if (address[i])
825 return 0;
826 return 1;
827}
828
829static const char TRext[] ALIGN1 = "\0\0\0Ki\0Mi\0Gi\0Ti";
830
831static void print_bytes_scaled(unsigned long long ull, const char *end)
832{
833 unsigned long long int_part;
834 const char *ext;
835 unsigned int frac_part;
836 int i;
837
838 frac_part = 0;
839 ext = TRext;
840 int_part = ull;
841 i = 4;
842 do {
843 if (int_part >= 1024) {
844 frac_part = ((((unsigned int) int_part) & (1024-1)) * 10) / 1024;
845 int_part /= 1024;
846 ext += 3; /* KiB, MiB, GiB, TiB */
847 }
848 --i;
849 } while (i);
850
851 printf("X bytes:%llu (%llu.%u %sB)%s", ull, int_part, frac_part, ext, end);
852}
853
854
855#ifdef HAVE_AFINET6
856#define IPV6_ADDR_ANY 0x0000U
857
858#define IPV6_ADDR_UNICAST 0x0001U
859#define IPV6_ADDR_MULTICAST 0x0002U
860#define IPV6_ADDR_ANYCAST 0x0004U
861
862#define IPV6_ADDR_LOOPBACK 0x0010U
863#define IPV6_ADDR_LINKLOCAL 0x0020U
864#define IPV6_ADDR_SITELOCAL 0x0040U
865
866#define IPV6_ADDR_COMPATv4 0x0080U
867
868#define IPV6_ADDR_SCOPE_MASK 0x00f0U
869
870#define IPV6_ADDR_MAPPED 0x1000U
871#define IPV6_ADDR_RESERVED 0x2000U /* reserved address space */
872
873
874static void ife_print6(struct interface *ptr)
875{
876 FILE *f;
877 char addr6[40], devname[21];
878 struct sockaddr_in6 sap;
879 int plen, scope, dad_status, if_idx;
880 char addr6p[8][5];
881
882 f = fopen_for_read(_PATH_PROCNET_IFINET6);
883 if (f == NULL)
884 return;
885
886 while (fscanf
887 (f, "%4s%4s%4s%4s%4s%4s%4s%4s %08x %02x %02x %02x %20s\n",
888 addr6p[0], addr6p[1], addr6p[2], addr6p[3], addr6p[4],
889 addr6p[5], addr6p[6], addr6p[7], &if_idx, &plen, &scope,
890 &dad_status, devname) != EOF
891 ) {
892 if (!strcmp(devname, ptr->name)) {
893 sprintf(addr6, "%s:%s:%s:%s:%s:%s:%s:%s",
894 addr6p[0], addr6p[1], addr6p[2], addr6p[3],
895 addr6p[4], addr6p[5], addr6p[6], addr6p[7]);
896 inet_pton(AF_INET6, addr6,
897 (struct sockaddr *) &sap.sin6_addr);
898 sap.sin6_family = AF_INET6;
899 printf(" inet6 addr: %s/%d",
900 INET6_sprint((struct sockaddr *) &sap, 1),
901 plen);
902 printf(" Scope:");
903 switch (scope & IPV6_ADDR_SCOPE_MASK) {
904 case 0:
905 puts("Global");
906 break;
907 case IPV6_ADDR_LINKLOCAL:
908 puts("Link");
909 break;
910 case IPV6_ADDR_SITELOCAL:
911 puts("Site");
912 break;
913 case IPV6_ADDR_COMPATv4:
914 puts("Compat");
915 break;
916 case IPV6_ADDR_LOOPBACK:
917 puts("Host");
918 break;
919 default:
920 puts("Unknown");
921 }
922 }
923 }
924 fclose(f);
925}
926#else
927#define ife_print6(a) ((void)0)
928#endif
929
930static void ife_print(struct interface *ptr)
931{
932 const struct aftype *ap;
933 const struct hwtype *hw;
934 int hf;
935 int can_compress = 0;
936
937 ap = get_afntype(ptr->addr.sa_family);
938 if (ap == NULL)
939 ap = get_afntype(0);
940
941 hf = ptr->type;
942
943 if (hf == ARPHRD_CSLIP || hf == ARPHRD_CSLIP6)
944 can_compress = 1;
945
946 hw = get_hwntype(hf);
947 if (hw == NULL)
948 hw = get_hwntype(-1);
949
950 printf("%-9s Link encap:%s ", ptr->name, hw->title);
951 /* For some hardware types (eg Ash, ATM) we don't print the
952 hardware address if it's null. */
953 if (hw->print != NULL
954 && !(hw_null_address(hw, ptr->hwaddr) && hw->suppress_null_addr)
955 ) {
956 printf("HWaddr %s ", hw->print((unsigned char *)ptr->hwaddr));
957 }
958#ifdef IFF_PORTSEL
959 if (ptr->flags & IFF_PORTSEL) {
960 printf("Media:%s", if_port_text[ptr->map.port] /* [0] */);
961 if (ptr->flags & IFF_AUTOMEDIA)
962 printf("(auto)");
963 }
964#endif
965 bb_putchar('\n');
966
967 if (ptr->has_ip) {
968 printf(" %s addr:%s ", ap->name,
969 ap->sprint(&ptr->addr, 1));
970 if (ptr->flags & IFF_POINTOPOINT) {
971 printf(" P-t-P:%s ", ap->sprint(&ptr->dstaddr, 1));
972 }
973 if (ptr->flags & IFF_BROADCAST) {
974 printf(" Bcast:%s ", ap->sprint(&ptr->broadaddr, 1));
975 }
976 printf(" Mask:%s\n", ap->sprint(&ptr->netmask, 1));
977 }
978
979 ife_print6(ptr);
980
981 printf(" ");
982 /* DONT FORGET TO ADD THE FLAGS IN ife_print_short, too */
983
984 if (ptr->flags == 0) {
985 printf("[NO FLAGS] ");
986 } else {
987 static const char ife_print_flags_strs[] ALIGN1 =
988 "UP\0"
989 "BROADCAST\0"
990 "DEBUG\0"
991 "LOOPBACK\0"
992 "POINTOPOINT\0"
993 "NOTRAILERS\0"
994 "RUNNING\0"
995 "NOARP\0"
996 "PROMISC\0"
997 "ALLMULTI\0"
998 "SLAVE\0"
999 "MASTER\0"
1000 "MULTICAST\0"
1001#ifdef HAVE_DYNAMIC
1002 "DYNAMIC\0"
1003#endif
1004 ;
1005 static const unsigned short ife_print_flags_mask[] ALIGN2 = {
1006 IFF_UP,
1007 IFF_BROADCAST,
1008 IFF_DEBUG,
1009 IFF_LOOPBACK,
1010 IFF_POINTOPOINT,
1011 IFF_NOTRAILERS,
1012 IFF_RUNNING,
1013 IFF_NOARP,
1014 IFF_PROMISC,
1015 IFF_ALLMULTI,
1016 IFF_SLAVE,
1017 IFF_MASTER,
1018 IFF_MULTICAST
1019#ifdef HAVE_DYNAMIC
1020 ,IFF_DYNAMIC
1021#endif
1022 };
1023 const unsigned short *mask = ife_print_flags_mask;
1024 const char *str = ife_print_flags_strs;
1025 do {
1026 if (ptr->flags & *mask) {
1027 printf("%s ", str);
1028 }
1029 mask++;
1030 str += strlen(str) + 1;
1031 } while (*str);
1032 }
1033
1034 /* DONT FORGET TO ADD THE FLAGS IN ife_print_short */
1035 printf(" MTU:%d Metric:%d", ptr->mtu, ptr->metric ? ptr->metric : 1);
1036#ifdef SIOCSKEEPALIVE
1037 if (ptr->outfill || ptr->keepalive)
1038 printf(" Outfill:%d Keepalive:%d", ptr->outfill, ptr->keepalive);
1039#endif
1040 bb_putchar('\n');
1041
1042 /* If needed, display the interface statistics. */
1043
1044 if (ptr->statistics_valid) {
1045 /* XXX: statistics are currently only printed for the primary address,
1046 * not for the aliases, although strictly speaking they're shared
1047 * by all addresses.
1048 */
1049 printf(" ");
1050
1051 printf("RX packets:%llu errors:%lu dropped:%lu overruns:%lu frame:%lu\n",
1052 ptr->stats.rx_packets, ptr->stats.rx_errors,
1053 ptr->stats.rx_dropped, ptr->stats.rx_fifo_errors,
1054 ptr->stats.rx_frame_errors);
1055 if (can_compress)
1056 printf(" compressed:%lu\n",
1057 ptr->stats.rx_compressed);
1058 printf(" ");
1059 printf("TX packets:%llu errors:%lu dropped:%lu overruns:%lu carrier:%lu\n",
1060 ptr->stats.tx_packets, ptr->stats.tx_errors,
1061 ptr->stats.tx_dropped, ptr->stats.tx_fifo_errors,
1062 ptr->stats.tx_carrier_errors);
1063 printf(" collisions:%lu ", ptr->stats.collisions);
1064 if (can_compress)
1065 printf("compressed:%lu ", ptr->stats.tx_compressed);
1066 if (ptr->tx_queue_len != -1)
1067 printf("txqueuelen:%d ", ptr->tx_queue_len);
1068 printf("\n R");
1069 print_bytes_scaled(ptr->stats.rx_bytes, " T");
1070 print_bytes_scaled(ptr->stats.tx_bytes, "\n");
1071 }
1072
1073 if (ptr->map.irq || ptr->map.mem_start
1074 || ptr->map.dma || ptr->map.base_addr
1075 ) {
1076 printf(" ");
1077 if (ptr->map.irq)
1078 printf("Interrupt:%d ", ptr->map.irq);
1079 if (ptr->map.base_addr >= 0x100) /* Only print devices using it for I/O maps */
1080 printf("Base address:0x%lx ",
1081 (unsigned long) ptr->map.base_addr);
1082 if (ptr->map.mem_start) {
1083 printf("Memory:%lx-%lx ", ptr->map.mem_start,
1084 ptr->map.mem_end);
1085 }
1086 if (ptr->map.dma)
1087 printf("DMA chan:%x ", ptr->map.dma);
1088 bb_putchar('\n');
1089 }
1090 bb_putchar('\n');
1091}
1092
1093static int do_if_print(struct interface *ife) /*, int *opt_a)*/
1094{
1095 int res;
1096
1097 res = do_if_fetch(ife);
1098 if (res >= 0) {
1099 if ((ife->flags & IFF_UP) || interface_opt_a)
1100 ife_print(ife);
1101 }
1102 return res;
1103}
1104
1105static struct interface *lookup_interface(char *name)
1106{
1107 struct interface *ife = NULL;
1108
1109 if (if_readlist_proc(name) < 0)
1110 return NULL;
1111 ife = add_interface(name);
1112 return ife;
1113}
1114
1115#ifdef UNUSED
1116static int for_all_interfaces(int (*doit) (struct interface *, void *),
1117 void *cookie)
1118{
1119 struct interface *ife;
1120
1121 if (!int_list && (if_readlist() < 0))
1122 return -1;
1123 for (ife = int_list; ife; ife = ife->next) {
1124 int err = doit(ife, cookie);
1125 if (err)
1126 return err;
1127 }
1128 return 0;
1129}
1130#endif
1131
1132/* for ipv4 add/del modes */
1133static int if_print(char *ifname)
1134{
1135 struct interface *ife;
1136 int res;
1137
1138 if (!ifname) {
1139 /*res = for_all_interfaces(do_if_print, &interface_opt_a);*/
1140 if (!int_list && (if_readlist() < 0))
1141 return -1;
1142 for (ife = int_list; ife; ife = ife->next) {
1143 int err = do_if_print(ife); /*, &interface_opt_a);*/
1144 if (err)
1145 return err;
1146 }
1147 return 0;
1148 }
1149 ife = lookup_interface(ifname);
1150 res = do_if_fetch(ife);
1151 if (res >= 0)
1152 ife_print(ife);
1153 return res;
1154}
1155
1156#if ENABLE_FEATURE_HWIB
1157/* Input an Infiniband address and convert to binary. */
1158int FAST_FUNC in_ib(const char *bufp, struct sockaddr *sap)
1159{
1160 sap->sa_family = ib_hwtype.type;
1161//TODO: error check?
1162 hex2bin((char*)sap->sa_data, bufp, INFINIBAND_ALEN);
1163# ifdef HWIB_DEBUG
1164 fprintf(stderr, "in_ib(%s): %s\n", bufp, UNSPEC_print(sap->sa_data));
1165# endif
1166 return 0;
1167}
1168#endif
1169
1170int FAST_FUNC display_interfaces(char *ifname)
1171{
1172 int status;
1173
1174 status = if_print(ifname);
1175
1176 return (status < 0); /* status < 0 == 1 -- error */
1177}
1178
generated by cgit at 2024-05-15 02:54:33 (GMT)