source: MondoRescue/branches/2.2.9/mindi-busybox/networking/interface.c@ 3320

Last change on this file since 3320 was 3320, checked in by Bruno Cornec, 9 years ago
  • Re-add (thanks git BTW) the 2.2.9 branch which had been destroyed in the move to 3.0
  • Property svn:eol-style set to native
File size: 28.7 KB
Line 
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 <net/if.h>
34#include <net/if_arp.h>
35#if (defined(__GLIBC__) && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1) || defined(_NEWLIB_VERSION)
36# include <net/ethernet.h>
37#else
38# include <linux/if_ether.h>
39#endif
40#include "libbb.h"
41#include "inet_common.h"
42
43#if ENABLE_FEATURE_HWIB
44/* #include <linux/if_infiniband.h> */
45# undef INFINIBAND_ALEN
46# define INFINIBAND_ALEN 20
47#endif
48
49#if ENABLE_FEATURE_IPV6
50# define HAVE_AFINET6 1
51#else
52# undef HAVE_AFINET6
53#endif
54
55#define _PATH_PROCNET_DEV "/proc/net/dev"
56#define _PATH_PROCNET_IFINET6 "/proc/net/if_inet6"
57
58#ifdef HAVE_AFINET6
59# ifndef _LINUX_IN6_H
60/*
61 * This is from linux/include/net/ipv6.h
62 */
63struct in6_ifreq {
64 struct in6_addr ifr6_addr;
65 uint32_t ifr6_prefixlen;
66 unsigned int ifr6_ifindex;
67};
68# endif
69#endif /* HAVE_AFINET6 */
70
71/* Defines for glibc2.0 users. */
72#ifndef SIOCSIFTXQLEN
73# define SIOCSIFTXQLEN 0x8943
74# define SIOCGIFTXQLEN 0x8942
75#endif
76
77/* ifr_qlen is ifru_ivalue, but it isn't present in 2.0 kernel headers */
78#ifndef ifr_qlen
79# define ifr_qlen ifr_ifru.ifru_mtu
80#endif
81
82#ifndef HAVE_TXQUEUELEN
83# define HAVE_TXQUEUELEN 1
84#endif
85
86#ifndef IFF_DYNAMIC
87# define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses */
88#endif
89
90/* Display an Internet socket address. */
91static const char* FAST_FUNC INET_sprint(struct sockaddr *sap, int numeric)
92{
93 static char *buff; /* defaults to NULL */
94
95 free(buff);
96 if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
97 return "[NONE SET]";
98 buff = INET_rresolve((struct sockaddr_in *) sap, numeric, 0xffffff00);
99 return buff;
100}
101
102#ifdef UNUSED_AND_BUGGY
103static int INET_getsock(char *bufp, struct sockaddr *sap)
104{
105 char *sp = bufp, *bp;
106 unsigned int i;
107 unsigned val;
108 struct sockaddr_in *sock_in;
109
110 sock_in = (struct sockaddr_in *) sap;
111 sock_in->sin_family = AF_INET;
112 sock_in->sin_port = 0;
113
114 val = 0;
115 bp = (char *) &val;
116 for (i = 0; i < sizeof(sock_in->sin_addr.s_addr); i++) {
117 *sp = toupper(*sp);
118
119 if ((unsigned)(*sp - 'A') <= 5)
120 bp[i] |= (int) (*sp - ('A' - 10));
121 else if (isdigit(*sp))
122 bp[i] |= (int) (*sp - '0');
123 else
124 return -1;
125
126 bp[i] <<= 4;
127 sp++;
128 *sp = toupper(*sp);
129
130 if ((unsigned)(*sp - 'A') <= 5)
131 bp[i] |= (int) (*sp - ('A' - 10));
132 else if (isdigit(*sp))
133 bp[i] |= (int) (*sp - '0');
134 else
135 return -1;
136
137 sp++;
138 }
139 sock_in->sin_addr.s_addr = htonl(val);
140
141 return (sp - bufp);
142}
143#endif
144
145static int FAST_FUNC INET_input(/*int type,*/ const char *bufp, struct sockaddr *sap)
146{
147 return INET_resolve(bufp, (struct sockaddr_in *) sap, 0);
148/*
149 switch (type) {
150 case 1:
151 return (INET_getsock(bufp, sap));
152 case 256:
153 return (INET_resolve(bufp, (struct sockaddr_in *) sap, 1));
154 default:
155 return (INET_resolve(bufp, (struct sockaddr_in *) sap, 0));
156 }
157*/
158}
159
160static const struct aftype inet_aftype = {
161 .name = "inet",
162 .title = "DARPA Internet",
163 .af = AF_INET,
164 .alen = 4,
165 .sprint = INET_sprint,
166 .input = INET_input,
167};
168
169#ifdef HAVE_AFINET6
170
171/* Display an Internet socket address. */
172/* dirty! struct sockaddr usually doesn't suffer for inet6 addresses, fst. */
173static const char* FAST_FUNC INET6_sprint(struct sockaddr *sap, int numeric)
174{
175 static char *buff;
176
177 free(buff);
178 if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
179 return "[NONE SET]";
180 buff = INET6_rresolve((struct sockaddr_in6 *) sap, numeric);
181 return buff;
182}
183
184#ifdef UNUSED
185static int INET6_getsock(char *bufp, struct sockaddr *sap)
186{
187 struct sockaddr_in6 *sin6;
188
189 sin6 = (struct sockaddr_in6 *) sap;
190 sin6->sin6_family = AF_INET6;
191 sin6->sin6_port = 0;
192
193 if (inet_pton(AF_INET6, bufp, sin6->sin6_addr.s6_addr) <= 0)
194 return -1;
195
196 return 16; /* ?;) */
197}
198#endif
199
200static int FAST_FUNC INET6_input(/*int type,*/ const char *bufp, struct sockaddr *sap)
201{
202 return INET6_resolve(bufp, (struct sockaddr_in6 *) sap);
203/*
204 switch (type) {
205 case 1:
206 return (INET6_getsock(bufp, sap));
207 default:
208 return (INET6_resolve(bufp, (struct sockaddr_in6 *) sap));
209 }
210*/
211}
212
213static const struct aftype inet6_aftype = {
214 .name = "inet6",
215 .title = "IPv6",
216 .af = AF_INET6,
217 .alen = sizeof(struct in6_addr),
218 .sprint = INET6_sprint,
219 .input = INET6_input,
220};
221
222#endif /* HAVE_AFINET6 */
223
224/* Display an UNSPEC address. */
225static char* FAST_FUNC UNSPEC_print(unsigned char *ptr)
226{
227 static char *buff;
228
229 char *pos;
230 unsigned int i;
231
232 if (!buff)
233 buff = xmalloc(sizeof(struct sockaddr) * 3 + 1);
234 pos = buff;
235 for (i = 0; i < sizeof(struct sockaddr); i++) {
236 /* careful -- not every libc's sprintf returns # bytes written */
237 sprintf(pos, "%02X-", (*ptr++ & 0377));
238 pos += 3;
239 }
240 /* Erase trailing "-". Works as long as sizeof(struct sockaddr) != 0 */
241 *--pos = '\0';
242 return buff;
243}
244
245/* Display an UNSPEC socket address. */
246static const char* FAST_FUNC UNSPEC_sprint(struct sockaddr *sap, int numeric UNUSED_PARAM)
247{
248 if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
249 return "[NONE SET]";
250 return UNSPEC_print((unsigned char *)sap->sa_data);
251}
252
253static const struct aftype unspec_aftype = {
254 .name = "unspec",
255 .title = "UNSPEC",
256 .af = AF_UNSPEC,
257 .alen = 0,
258 .print = UNSPEC_print,
259 .sprint = UNSPEC_sprint,
260};
261
262static const struct aftype *const aftypes[] = {
263 &inet_aftype,
264#ifdef HAVE_AFINET6
265 &inet6_aftype,
266#endif
267 &unspec_aftype,
268 NULL
269};
270
271/* Check our protocol family table for this family. */
272const struct aftype* FAST_FUNC get_aftype(const char *name)
273{
274 const struct aftype *const *afp;
275
276 afp = aftypes;
277 while (*afp != NULL) {
278 if (!strcmp((*afp)->name, name))
279 return (*afp);
280 afp++;
281 }
282 return NULL;
283}
284
285/* Check our protocol family table for this family. */
286static const struct aftype *get_afntype(int af)
287{
288 const struct aftype *const *afp;
289
290 afp = aftypes;
291 while (*afp != NULL) {
292 if ((*afp)->af == af)
293 return *afp;
294 afp++;
295 }
296 return NULL;
297}
298
299struct user_net_device_stats {
300 unsigned long long rx_packets; /* total packets received */
301 unsigned long long tx_packets; /* total packets transmitted */
302 unsigned long long rx_bytes; /* total bytes received */
303 unsigned long long tx_bytes; /* total bytes transmitted */
304 unsigned long rx_errors; /* bad packets received */
305 unsigned long tx_errors; /* packet transmit problems */
306 unsigned long rx_dropped; /* no space in linux buffers */
307 unsigned long tx_dropped; /* no space available in linux */
308 unsigned long rx_multicast; /* multicast packets received */
309 unsigned long rx_compressed;
310 unsigned long tx_compressed;
311 unsigned long collisions;
312
313 /* detailed rx_errors: */
314 unsigned long rx_length_errors;
315 unsigned long rx_over_errors; /* receiver ring buff overflow */
316 unsigned long rx_crc_errors; /* recved pkt with crc error */
317 unsigned long rx_frame_errors; /* recv'd frame alignment error */
318 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
319 unsigned long rx_missed_errors; /* receiver missed packet */
320 /* detailed tx_errors */
321 unsigned long tx_aborted_errors;
322 unsigned long tx_carrier_errors;
323 unsigned long tx_fifo_errors;
324 unsigned long tx_heartbeat_errors;
325 unsigned long tx_window_errors;
326};
327
328struct interface {
329 struct interface *next, *prev;
330 char name[IFNAMSIZ]; /* interface name */
331 short type; /* if type */
332 short flags; /* various flags */
333 int metric; /* routing metric */
334 int mtu; /* MTU value */
335 int tx_queue_len; /* transmit queue length */
336 struct ifmap map; /* hardware setup */
337 struct sockaddr addr; /* IP address */
338 struct sockaddr dstaddr; /* P-P IP address */
339 struct sockaddr broadaddr; /* IP broadcast address */
340 struct sockaddr netmask; /* IP network mask */
341 int has_ip;
342 char hwaddr[32]; /* HW address */
343 int statistics_valid;
344 struct user_net_device_stats stats; /* statistics */
345 int keepalive; /* keepalive value for SLIP */
346 int outfill; /* outfill value for SLIP */
347};
348
349
350smallint interface_opt_a; /* show all interfaces */
351
352static struct interface *int_list, *int_last;
353
354
355#if 0
356/* like strcmp(), but knows about numbers */
357except that the freshly added calls to xatoul() brf on ethernet aliases with
358uClibc with e.g.: ife->name='lo' name='eth0:1'
359static int nstrcmp(const char *a, const char *b)
360{
361 const char *a_ptr = a;
362 const char *b_ptr = b;
363
364 while (*a == *b) {
365 if (*a == '\0') {
366 return 0;
367 }
368 if (!isdigit(*a) && isdigit(*(a+1))) {
369 a_ptr = a+1;
370 b_ptr = b+1;
371 }
372 a++;
373 b++;
374 }
375
376 if (isdigit(*a) && isdigit(*b)) {
377 return xatoul(a_ptr) > xatoul(b_ptr) ? 1 : -1;
378 }
379 return *a - *b;
380}
381#endif
382
383static struct interface *add_interface(char *name)
384{
385 struct interface *ife, **nextp, *new;
386
387 for (ife = int_last; ife; ife = ife->prev) {
388 int n = /*n*/strcmp(ife->name, name);
389
390 if (n == 0)
391 return ife;
392 if (n < 0)
393 break;
394 }
395
396 new = xzalloc(sizeof(*new));
397 strncpy_IFNAMSIZ(new->name, name);
398 nextp = ife ? &ife->next : &int_list;
399 new->prev = ife;
400 new->next = *nextp;
401 if (new->next)
402 new->next->prev = new;
403 else
404 int_last = new;
405 *nextp = new;
406 return new;
407}
408
409static char *get_name(char *name, char *p)
410{
411 /* Extract <name> from nul-terminated p where p matches
412 * <name>: after leading whitespace.
413 * If match is not made, set name empty and return unchanged p
414 */
415 char *nameend;
416 char *namestart = skip_whitespace(p);
417
418 nameend = namestart;
419 while (*nameend && *nameend != ':' && !isspace(*nameend))
420 nameend++;
421 if (*nameend == ':') {
422 if ((nameend - namestart) < IFNAMSIZ) {
423 memcpy(name, namestart, nameend - namestart);
424 name[nameend - namestart] = '\0';
425 p = nameend;
426 } else {
427 /* Interface name too large */
428 name[0] = '\0';
429 }
430 } else {
431 /* trailing ':' not found - return empty */
432 name[0] = '\0';
433 }
434 return p + 1;
435}
436
437/* If scanf supports size qualifiers for %n conversions, then we can
438 * use a modified fmt that simply stores the position in the fields
439 * having no associated fields in the proc string. Of course, we need
440 * to zero them again when we're done. But that is smaller than the
441 * old approach of multiple scanf occurrences with large numbers of
442 * args. */
443
444/* static const char *const ss_fmt[] = { */
445/* "%lln%llu%lu%lu%lu%lu%ln%ln%lln%llu%lu%lu%lu%lu%lu", */
446/* "%llu%llu%lu%lu%lu%lu%ln%ln%llu%llu%lu%lu%lu%lu%lu", */
447/* "%llu%llu%lu%lu%lu%lu%lu%lu%llu%llu%lu%lu%lu%lu%lu%lu" */
448/* }; */
449
450 /* Lie about the size of the int pointed to for %n. */
451#if INT_MAX == LONG_MAX
452static const char *const ss_fmt[] = {
453 "%n%llu%u%u%u%u%n%n%n%llu%u%u%u%u%u",
454 "%llu%llu%u%u%u%u%n%n%llu%llu%u%u%u%u%u",
455 "%llu%llu%u%u%u%u%u%u%llu%llu%u%u%u%u%u%u"
456};
457#else
458static const char *const ss_fmt[] = {
459 "%n%llu%lu%lu%lu%lu%n%n%n%llu%lu%lu%lu%lu%lu",
460 "%llu%llu%lu%lu%lu%lu%n%n%llu%llu%lu%lu%lu%lu%lu",
461 "%llu%llu%lu%lu%lu%lu%lu%lu%llu%llu%lu%lu%lu%lu%lu%lu"
462};
463
464#endif
465
466static void get_dev_fields(char *bp, struct interface *ife, int procnetdev_vsn)
467{
468 memset(&ife->stats, 0, sizeof(struct user_net_device_stats));
469
470 sscanf(bp, ss_fmt[procnetdev_vsn],
471 &ife->stats.rx_bytes, /* missing for 0 */
472 &ife->stats.rx_packets,
473 &ife->stats.rx_errors,
474 &ife->stats.rx_dropped,
475 &ife->stats.rx_fifo_errors,
476 &ife->stats.rx_frame_errors,
477 &ife->stats.rx_compressed, /* missing for <= 1 */
478 &ife->stats.rx_multicast, /* missing for <= 1 */
479 &ife->stats.tx_bytes, /* missing for 0 */
480 &ife->stats.tx_packets,
481 &ife->stats.tx_errors,
482 &ife->stats.tx_dropped,
483 &ife->stats.tx_fifo_errors,
484 &ife->stats.collisions,
485 &ife->stats.tx_carrier_errors,
486 &ife->stats.tx_compressed /* missing for <= 1 */
487 );
488
489 if (procnetdev_vsn <= 1) {
490 if (procnetdev_vsn == 0) {
491 ife->stats.rx_bytes = 0;
492 ife->stats.tx_bytes = 0;
493 }
494 ife->stats.rx_multicast = 0;
495 ife->stats.rx_compressed = 0;
496 ife->stats.tx_compressed = 0;
497 }
498}
499
500static int procnetdev_version(char *buf)
501{
502 if (strstr(buf, "compressed"))
503 return 2;
504 if (strstr(buf, "bytes"))
505 return 1;
506 return 0;
507}
508
509static int if_readconf(void)
510{
511 int numreqs = 30;
512 struct ifconf ifc;
513 struct ifreq *ifr;
514 int n, err = -1;
515 int skfd;
516
517 ifc.ifc_buf = NULL;
518
519 /* SIOCGIFCONF currently seems to only work properly on AF_INET sockets
520 (as of 2.1.128) */
521 skfd = socket(AF_INET, SOCK_DGRAM, 0);
522 if (skfd < 0) {
523 bb_perror_msg("error: no inet socket available");
524 return -1;
525 }
526
527 for (;;) {
528 ifc.ifc_len = sizeof(struct ifreq) * numreqs;
529 ifc.ifc_buf = xrealloc(ifc.ifc_buf, ifc.ifc_len);
530
531 if (ioctl_or_warn(skfd, SIOCGIFCONF, &ifc) < 0) {
532 goto out;
533 }
534 if (ifc.ifc_len == (int)(sizeof(struct ifreq) * numreqs)) {
535 /* assume it overflowed and try again */
536 numreqs += 10;
537 continue;
538 }
539 break;
540 }
541
542 ifr = ifc.ifc_req;
543 for (n = 0; n < ifc.ifc_len; n += sizeof(struct ifreq)) {
544 add_interface(ifr->ifr_name);
545 ifr++;
546 }
547 err = 0;
548
549 out:
550 close(skfd);
551 free(ifc.ifc_buf);
552 return err;
553}
554
555static int if_readlist_proc(char *target)
556{
557 static smallint proc_read;
558
559 FILE *fh;
560 char buf[512];
561 struct interface *ife;
562 int err, procnetdev_vsn;
563
564 if (proc_read)
565 return 0;
566 if (!target)
567 proc_read = 1;
568
569 fh = fopen_or_warn(_PATH_PROCNET_DEV, "r");
570 if (!fh) {
571 return if_readconf();
572 }
573 fgets(buf, sizeof buf, fh); /* eat line */
574 fgets(buf, sizeof buf, fh);
575
576 procnetdev_vsn = procnetdev_version(buf);
577
578 err = 0;
579 while (fgets(buf, sizeof buf, fh)) {
580 char *s, name[128];
581
582 s = get_name(name, buf);
583 ife = add_interface(name);
584 get_dev_fields(s, ife, procnetdev_vsn);
585 ife->statistics_valid = 1;
586 if (target && !strcmp(target, name))
587 break;
588 }
589 if (ferror(fh)) {
590 bb_perror_msg(_PATH_PROCNET_DEV);
591 err = -1;
592 proc_read = 0;
593 }
594 fclose(fh);
595 return err;
596}
597
598static int if_readlist(void)
599{
600 int err = if_readlist_proc(NULL);
601 /* Needed in order to get ethN:M aliases */
602 if (!err)
603 err = if_readconf();
604 return err;
605}
606
607/* Fetch the interface configuration from the kernel. */
608static int if_fetch(struct interface *ife)
609{
610 struct ifreq ifr;
611 char *ifname = ife->name;
612 int skfd;
613
614 skfd = xsocket(AF_INET, SOCK_DGRAM, 0);
615
616 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
617 if (ioctl(skfd, SIOCGIFFLAGS, &ifr) < 0) {
618 close(skfd);
619 return -1;
620 }
621 ife->flags = ifr.ifr_flags;
622
623 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
624 memset(ife->hwaddr, 0, 32);
625 if (ioctl(skfd, SIOCGIFHWADDR, &ifr) >= 0)
626 memcpy(ife->hwaddr, ifr.ifr_hwaddr.sa_data, 8);
627
628 ife->type = ifr.ifr_hwaddr.sa_family;
629
630 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
631 ife->metric = 0;
632 if (ioctl(skfd, SIOCGIFMETRIC, &ifr) >= 0)
633 ife->metric = ifr.ifr_metric;
634
635 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
636 ife->mtu = 0;
637 if (ioctl(skfd, SIOCGIFMTU, &ifr) >= 0)
638 ife->mtu = ifr.ifr_mtu;
639
640 memset(&ife->map, 0, sizeof(struct ifmap));
641#ifdef SIOCGIFMAP
642 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
643 if (ioctl(skfd, SIOCGIFMAP, &ifr) == 0)
644 ife->map = ifr.ifr_map;
645#endif
646
647#ifdef HAVE_TXQUEUELEN
648 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
649 ife->tx_queue_len = -1; /* unknown value */
650 if (ioctl(skfd, SIOCGIFTXQLEN, &ifr) >= 0)
651 ife->tx_queue_len = ifr.ifr_qlen;
652#else
653 ife->tx_queue_len = -1; /* unknown value */
654#endif
655
656 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
657 ifr.ifr_addr.sa_family = AF_INET;
658 memset(&ife->addr, 0, sizeof(struct sockaddr));
659 if (ioctl(skfd, SIOCGIFADDR, &ifr) == 0) {
660 ife->has_ip = 1;
661 ife->addr = ifr.ifr_addr;
662 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
663 memset(&ife->dstaddr, 0, sizeof(struct sockaddr));
664 if (ioctl(skfd, SIOCGIFDSTADDR, &ifr) >= 0)
665 ife->dstaddr = ifr.ifr_dstaddr;
666
667 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
668 memset(&ife->broadaddr, 0, sizeof(struct sockaddr));
669 if (ioctl(skfd, SIOCGIFBRDADDR, &ifr) >= 0)
670 ife->broadaddr = ifr.ifr_broadaddr;
671
672 strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
673 memset(&ife->netmask, 0, sizeof(struct sockaddr));
674 if (ioctl(skfd, SIOCGIFNETMASK, &ifr) >= 0)
675 ife->netmask = ifr.ifr_netmask;
676 }
677
678 close(skfd);
679 return 0;
680}
681
682static int do_if_fetch(struct interface *ife)
683{
684 if (if_fetch(ife) < 0) {
685 const char *errmsg;
686
687 if (errno == ENODEV) {
688 /* Give better error message for this case. */
689 errmsg = "Device not found";
690 } else {
691 errmsg = strerror(errno);
692 }
693 bb_error_msg("%s: error fetching interface information: %s",
694 ife->name, errmsg);
695 return -1;
696 }
697 return 0;
698}
699
700static const struct hwtype unspec_hwtype = {
701 .name = "unspec",
702 .title = "UNSPEC",
703 .type = -1,
704 .print = UNSPEC_print
705};
706
707static const struct hwtype loop_hwtype = {
708 .name = "loop",
709 .title = "Local Loopback",
710 .type = ARPHRD_LOOPBACK
711};
712
713/* Display an Ethernet address in readable format. */
714static char* FAST_FUNC ether_print(unsigned char *ptr)
715{
716 static char *buff;
717
718 free(buff);
719 buff = xasprintf("%02X:%02X:%02X:%02X:%02X:%02X",
720 (ptr[0] & 0377), (ptr[1] & 0377), (ptr[2] & 0377),
721 (ptr[3] & 0377), (ptr[4] & 0377), (ptr[5] & 0377)
722 );
723 return buff;
724}
725
726static int FAST_FUNC ether_input(const char *bufp, struct sockaddr *sap);
727
728static const struct hwtype ether_hwtype = {
729 .name = "ether",
730 .title = "Ethernet",
731 .type = ARPHRD_ETHER,
732 .alen = ETH_ALEN,
733 .print = ether_print,
734 .input = ether_input
735};
736
737static unsigned hexchar2int(char c)
738{
739 if (isdigit(c))
740 return c - '0';
741 c &= ~0x20; /* a -> A */
742 if ((unsigned)(c - 'A') <= 5)
743 return c - ('A' - 10);
744 return ~0U;
745}
746
747/* Input an Ethernet address and convert to binary. */
748static int FAST_FUNC ether_input(const char *bufp, struct sockaddr *sap)
749{
750 unsigned char *ptr;
751 char c;
752 int i;
753 unsigned val;
754
755 sap->sa_family = ether_hwtype.type;
756 ptr = (unsigned char*) sap->sa_data;
757
758 i = 0;
759 while ((*bufp != '\0') && (i < ETH_ALEN)) {
760 val = hexchar2int(*bufp++) * 0x10;
761 if (val > 0xff) {
762 errno = EINVAL;
763 return -1;
764 }
765 c = *bufp;
766 if (c == ':' || c == 0)
767 val >>= 4;
768 else {
769 val |= hexchar2int(c);
770 if (val > 0xff) {
771 errno = EINVAL;
772 return -1;
773 }
774 }
775 if (c != 0)
776 bufp++;
777 *ptr++ = (unsigned char) val;
778 i++;
779
780 /* We might get a semicolon here - not required. */
781 if (*bufp == ':') {
782 bufp++;
783 }
784 }
785 return 0;
786}
787
788static const struct hwtype ppp_hwtype = {
789 .name = "ppp",
790 .title = "Point-to-Point Protocol",
791 .type = ARPHRD_PPP
792};
793
794#if ENABLE_FEATURE_IPV6
795static const struct hwtype sit_hwtype = {
796 .name = "sit",
797 .title = "IPv6-in-IPv4",
798 .type = ARPHRD_SIT,
799 .print = UNSPEC_print,
800 .suppress_null_addr = 1
801};
802#endif
803#if ENABLE_FEATURE_HWIB
804static const struct hwtype ib_hwtype = {
805 .name = "infiniband",
806 .title = "InfiniBand",
807 .type = ARPHRD_INFINIBAND,
808 .alen = INFINIBAND_ALEN,
809 .print = UNSPEC_print,
810 .input = in_ib,
811};
812#endif
813
814
815static const struct hwtype *const hwtypes[] = {
816 &loop_hwtype,
817 &ether_hwtype,
818 &ppp_hwtype,
819 &unspec_hwtype,
820#if ENABLE_FEATURE_IPV6
821 &sit_hwtype,
822#endif
823#if ENABLE_FEATURE_HWIB
824 &ib_hwtype,
825#endif
826 NULL
827};
828
829#ifdef IFF_PORTSEL
830static const char *const if_port_text[] = {
831 /* Keep in step with <linux/netdevice.h> */
832 "unknown",
833 "10base2",
834 "10baseT",
835 "AUI",
836 "100baseT",
837 "100baseTX",
838 "100baseFX",
839 NULL
840};
841#endif
842
843/* Check our hardware type table for this type. */
844const struct hwtype* FAST_FUNC get_hwtype(const char *name)
845{
846 const struct hwtype *const *hwp;
847
848 hwp = hwtypes;
849 while (*hwp != NULL) {
850 if (!strcmp((*hwp)->name, name))
851 return (*hwp);
852 hwp++;
853 }
854 return NULL;
855}
856
857/* Check our hardware type table for this type. */
858const struct hwtype* FAST_FUNC get_hwntype(int type)
859{
860 const struct hwtype *const *hwp;
861
862 hwp = hwtypes;
863 while (*hwp != NULL) {
864 if ((*hwp)->type == type)
865 return *hwp;
866 hwp++;
867 }
868 return NULL;
869}
870
871/* return 1 if address is all zeros */
872static int hw_null_address(const struct hwtype *hw, void *ap)
873{
874 int i;
875 unsigned char *address = (unsigned char *) ap;
876
877 for (i = 0; i < hw->alen; i++)
878 if (address[i])
879 return 0;
880 return 1;
881}
882
883static const char TRext[] ALIGN1 = "\0\0\0Ki\0Mi\0Gi\0Ti";
884
885static void print_bytes_scaled(unsigned long long ull, const char *end)
886{
887 unsigned long long int_part;
888 const char *ext;
889 unsigned int frac_part;
890 int i;
891
892 frac_part = 0;
893 ext = TRext;
894 int_part = ull;
895 i = 4;
896 do {
897 if (int_part >= 1024) {
898 frac_part = ((((unsigned int) int_part) & (1024-1)) * 10) / 1024;
899 int_part /= 1024;
900 ext += 3; /* KiB, MiB, GiB, TiB */
901 }
902 --i;
903 } while (i);
904
905 printf("X bytes:%llu (%llu.%u %sB)%s", ull, int_part, frac_part, ext, end);
906}
907
908
909#ifdef HAVE_AFINET6
910#define IPV6_ADDR_ANY 0x0000U
911
912#define IPV6_ADDR_UNICAST 0x0001U
913#define IPV6_ADDR_MULTICAST 0x0002U
914#define IPV6_ADDR_ANYCAST 0x0004U
915
916#define IPV6_ADDR_LOOPBACK 0x0010U
917#define IPV6_ADDR_LINKLOCAL 0x0020U
918#define IPV6_ADDR_SITELOCAL 0x0040U
919
920#define IPV6_ADDR_COMPATv4 0x0080U
921
922#define IPV6_ADDR_SCOPE_MASK 0x00f0U
923
924#define IPV6_ADDR_MAPPED 0x1000U
925#define IPV6_ADDR_RESERVED 0x2000U /* reserved address space */
926
927
928static void ife_print6(struct interface *ptr)
929{
930 FILE *f;
931 char addr6[40], devname[20];
932 struct sockaddr_in6 sap;
933 int plen, scope, dad_status, if_idx;
934 char addr6p[8][5];
935
936 f = fopen_for_read(_PATH_PROCNET_IFINET6);
937 if (f == NULL)
938 return;
939
940 while (fscanf
941 (f, "%4s%4s%4s%4s%4s%4s%4s%4s %08x %02x %02x %02x %20s\n",
942 addr6p[0], addr6p[1], addr6p[2], addr6p[3], addr6p[4],
943 addr6p[5], addr6p[6], addr6p[7], &if_idx, &plen, &scope,
944 &dad_status, devname) != EOF
945 ) {
946 if (!strcmp(devname, ptr->name)) {
947 sprintf(addr6, "%s:%s:%s:%s:%s:%s:%s:%s",
948 addr6p[0], addr6p[1], addr6p[2], addr6p[3],
949 addr6p[4], addr6p[5], addr6p[6], addr6p[7]);
950 inet_pton(AF_INET6, addr6,
951 (struct sockaddr *) &sap.sin6_addr);
952 sap.sin6_family = AF_INET6;
953 printf(" inet6 addr: %s/%d",
954 INET6_sprint((struct sockaddr *) &sap, 1),
955 plen);
956 printf(" Scope:");
957 switch (scope & IPV6_ADDR_SCOPE_MASK) {
958 case 0:
959 puts("Global");
960 break;
961 case IPV6_ADDR_LINKLOCAL:
962 puts("Link");
963 break;
964 case IPV6_ADDR_SITELOCAL:
965 puts("Site");
966 break;
967 case IPV6_ADDR_COMPATv4:
968 puts("Compat");
969 break;
970 case IPV6_ADDR_LOOPBACK:
971 puts("Host");
972 break;
973 default:
974 puts("Unknown");
975 }
976 }
977 }
978 fclose(f);
979}
980#else
981#define ife_print6(a) ((void)0)
982#endif
983
984static void ife_print(struct interface *ptr)
985{
986 const struct aftype *ap;
987 const struct hwtype *hw;
988 int hf;
989 int can_compress = 0;
990
991 ap = get_afntype(ptr->addr.sa_family);
992 if (ap == NULL)
993 ap = get_afntype(0);
994
995 hf = ptr->type;
996
997 if (hf == ARPHRD_CSLIP || hf == ARPHRD_CSLIP6)
998 can_compress = 1;
999
1000 hw = get_hwntype(hf);
1001 if (hw == NULL)
1002 hw = get_hwntype(-1);
1003
1004 printf("%-9s Link encap:%s ", ptr->name, hw->title);
1005 /* For some hardware types (eg Ash, ATM) we don't print the
1006 hardware address if it's null. */
1007 if (hw->print != NULL
1008 && !(hw_null_address(hw, ptr->hwaddr) && hw->suppress_null_addr)
1009 ) {
1010 printf("HWaddr %s ", hw->print((unsigned char *)ptr->hwaddr));
1011 }
1012#ifdef IFF_PORTSEL
1013 if (ptr->flags & IFF_PORTSEL) {
1014 printf("Media:%s", if_port_text[ptr->map.port] /* [0] */);
1015 if (ptr->flags & IFF_AUTOMEDIA)
1016 printf("(auto)");
1017 }
1018#endif
1019 bb_putchar('\n');
1020
1021 if (ptr->has_ip) {
1022 printf(" %s addr:%s ", ap->name,
1023 ap->sprint(&ptr->addr, 1));
1024 if (ptr->flags & IFF_POINTOPOINT) {
1025 printf(" P-t-P:%s ", ap->sprint(&ptr->dstaddr, 1));
1026 }
1027 if (ptr->flags & IFF_BROADCAST) {
1028 printf(" Bcast:%s ", ap->sprint(&ptr->broadaddr, 1));
1029 }
1030 printf(" Mask:%s\n", ap->sprint(&ptr->netmask, 1));
1031 }
1032
1033 ife_print6(ptr);
1034
1035 printf(" ");
1036 /* DONT FORGET TO ADD THE FLAGS IN ife_print_short, too */
1037
1038 if (ptr->flags == 0) {
1039 printf("[NO FLAGS] ");
1040 } else {
1041 static const char ife_print_flags_strs[] ALIGN1 =
1042 "UP\0"
1043 "BROADCAST\0"
1044 "DEBUG\0"
1045 "LOOPBACK\0"
1046 "POINTOPOINT\0"
1047 "NOTRAILERS\0"
1048 "RUNNING\0"
1049 "NOARP\0"
1050 "PROMISC\0"
1051 "ALLMULTI\0"
1052 "SLAVE\0"
1053 "MASTER\0"
1054 "MULTICAST\0"
1055#ifdef HAVE_DYNAMIC
1056 "DYNAMIC\0"
1057#endif
1058 ;
1059 static const unsigned short ife_print_flags_mask[] ALIGN2 = {
1060 IFF_UP,
1061 IFF_BROADCAST,
1062 IFF_DEBUG,
1063 IFF_LOOPBACK,
1064 IFF_POINTOPOINT,
1065 IFF_NOTRAILERS,
1066 IFF_RUNNING,
1067 IFF_NOARP,
1068 IFF_PROMISC,
1069 IFF_ALLMULTI,
1070 IFF_SLAVE,
1071 IFF_MASTER,
1072 IFF_MULTICAST
1073#ifdef HAVE_DYNAMIC
1074 ,IFF_DYNAMIC
1075#endif
1076 };
1077 const unsigned short *mask = ife_print_flags_mask;
1078 const char *str = ife_print_flags_strs;
1079 do {
1080 if (ptr->flags & *mask) {
1081 printf("%s ", str);
1082 }
1083 mask++;
1084 str += strlen(str) + 1;
1085 } while (*str);
1086 }
1087
1088 /* DONT FORGET TO ADD THE FLAGS IN ife_print_short */
1089 printf(" MTU:%d Metric:%d", ptr->mtu, ptr->metric ? ptr->metric : 1);
1090#ifdef SIOCSKEEPALIVE
1091 if (ptr->outfill || ptr->keepalive)
1092 printf(" Outfill:%d Keepalive:%d", ptr->outfill, ptr->keepalive);
1093#endif
1094 bb_putchar('\n');
1095
1096 /* If needed, display the interface statistics. */
1097
1098 if (ptr->statistics_valid) {
1099 /* XXX: statistics are currently only printed for the primary address,
1100 * not for the aliases, although strictly speaking they're shared
1101 * by all addresses.
1102 */
1103 printf(" ");
1104
1105 printf("RX packets:%llu errors:%lu dropped:%lu overruns:%lu frame:%lu\n",
1106 ptr->stats.rx_packets, ptr->stats.rx_errors,
1107 ptr->stats.rx_dropped, ptr->stats.rx_fifo_errors,
1108 ptr->stats.rx_frame_errors);
1109 if (can_compress)
1110 printf(" compressed:%lu\n",
1111 ptr->stats.rx_compressed);
1112 printf(" ");
1113 printf("TX packets:%llu errors:%lu dropped:%lu overruns:%lu carrier:%lu\n",
1114 ptr->stats.tx_packets, ptr->stats.tx_errors,
1115 ptr->stats.tx_dropped, ptr->stats.tx_fifo_errors,
1116 ptr->stats.tx_carrier_errors);
1117 printf(" collisions:%lu ", ptr->stats.collisions);
1118 if (can_compress)
1119 printf("compressed:%lu ", ptr->stats.tx_compressed);
1120 if (ptr->tx_queue_len != -1)
1121 printf("txqueuelen:%d ", ptr->tx_queue_len);
1122 printf("\n R");
1123 print_bytes_scaled(ptr->stats.rx_bytes, " T");
1124 print_bytes_scaled(ptr->stats.tx_bytes, "\n");
1125 }
1126
1127 if (ptr->map.irq || ptr->map.mem_start
1128 || ptr->map.dma || ptr->map.base_addr
1129 ) {
1130 printf(" ");
1131 if (ptr->map.irq)
1132 printf("Interrupt:%d ", ptr->map.irq);
1133 if (ptr->map.base_addr >= 0x100) /* Only print devices using it for
1134 I/O maps */
1135 printf("Base address:0x%lx ",
1136 (unsigned long) ptr->map.base_addr);
1137 if (ptr->map.mem_start) {
1138 printf("Memory:%lx-%lx ", ptr->map.mem_start,
1139 ptr->map.mem_end);
1140 }
1141 if (ptr->map.dma)
1142 printf("DMA chan:%x ", ptr->map.dma);
1143 bb_putchar('\n');
1144 }
1145 bb_putchar('\n');
1146}
1147
1148static int do_if_print(struct interface *ife) /*, int *opt_a)*/
1149{
1150 int res;
1151
1152 res = do_if_fetch(ife);
1153 if (res >= 0) {
1154 if ((ife->flags & IFF_UP) || interface_opt_a)
1155 ife_print(ife);
1156 }
1157 return res;
1158}
1159
1160static struct interface *lookup_interface(char *name)
1161{
1162 struct interface *ife = NULL;
1163
1164 if (if_readlist_proc(name) < 0)
1165 return NULL;
1166 ife = add_interface(name);
1167 return ife;
1168}
1169
1170#ifdef UNUSED
1171static int for_all_interfaces(int (*doit) (struct interface *, void *),
1172 void *cookie)
1173{
1174 struct interface *ife;
1175
1176 if (!int_list && (if_readlist() < 0))
1177 return -1;
1178 for (ife = int_list; ife; ife = ife->next) {
1179 int err = doit(ife, cookie);
1180 if (err)
1181 return err;
1182 }
1183 return 0;
1184}
1185#endif
1186
1187/* for ipv4 add/del modes */
1188static int if_print(char *ifname)
1189{
1190 struct interface *ife;
1191 int res;
1192
1193 if (!ifname) {
1194 /*res = for_all_interfaces(do_if_print, &interface_opt_a);*/
1195 if (!int_list && (if_readlist() < 0))
1196 return -1;
1197 for (ife = int_list; ife; ife = ife->next) {
1198 int err = do_if_print(ife); /*, &interface_opt_a);*/
1199 if (err)
1200 return err;
1201 }
1202 return 0;
1203 }
1204 ife = lookup_interface(ifname);
1205 res = do_if_fetch(ife);
1206 if (res >= 0)
1207 ife_print(ife);
1208 return res;
1209}
1210
1211#if ENABLE_FEATURE_HWIB
1212/* Input an Infiniband address and convert to binary. */
1213int FAST_FUNC in_ib(const char *bufp, struct sockaddr *sap)
1214{
1215 sap->sa_family = ib_hwtype.type;
1216//TODO: error check?
1217 hex2bin((char*)sap->sa_data, bufp, INFINIBAND_ALEN);
1218# ifdef HWIB_DEBUG
1219 fprintf(stderr, "in_ib(%s): %s\n", bufp, UNSPEC_print(sap->sa_data));
1220# endif
1221 return 0;
1222}
1223#endif
1224
1225int FAST_FUNC display_interfaces(char *ifname)
1226{
1227 int status;
1228
1229 status = if_print(ifname);
1230
1231 return (status < 0); /* status < 0 == 1 -- error */
1232}
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