Context Navigation

interface.c@ 3232

Visit:

Last change on this file since 3232 was 3232, checked in by Bruno Cornec, 10 years ago
Update mindi-busybox to 1.21.1
File size: 28.6 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
34	#include "libbb.h"
35	#include "inet_common.h"
36	#include <net/if.h>
37	#include <net/if_arp.h>
38	#ifdef HAVE_NET_ETHERNET_H
39	# include <net/ethernet.h>
40	#endif
41
42	#if ENABLE_FEATURE_HWIB
43	/* #include <linux/if_infiniband.h> */
44	# undef INFINIBAND_ALEN
45	# define INFINIBAND_ALEN 20
46	#endif
47
48	#if ENABLE_FEATURE_IPV6
49	# define HAVE_AFINET6 1
50	#else
51	# undef HAVE_AFINET6
52	#endif
53
54	#define _PATH_PROCNET_DEV "/proc/net/dev"
55	#define _PATH_PROCNET_IFINET6 "/proc/net/if_inet6"
56
57	#ifdef HAVE_AFINET6
58	# ifndef _LINUX_IN6_H
59	/*
60	* This is from linux/include/net/ipv6.h
61	*/
62	struct in6_ifreq {
63	struct in6_addr ifr6_addr;
64	uint32_t ifr6_prefixlen;
65	unsigned int ifr6_ifindex;
66	};
67	# endif
68	#endif /* HAVE_AFINET6 */
69
70	/* Defines for glibc2.0 users. */
71	#ifndef SIOCSIFTXQLEN
72	# define SIOCSIFTXQLEN 0x8943
73	# define SIOCGIFTXQLEN 0x8942
74	#endif
75
76	/* ifr_qlen is ifru_ivalue, but it isn't present in 2.0 kernel headers */
77	#ifndef ifr_qlen
78	# define ifr_qlen ifr_ifru.ifru_mtu
79	#endif
80
81	#ifndef HAVE_TXQUEUELEN
82	# define HAVE_TXQUEUELEN 1
83	#endif
84
85	#ifndef IFF_DYNAMIC
86	# define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses */
87	#endif
88
89	/* Display an Internet socket address. */
90	static 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
102	static 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
144	static 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
159	static 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. */
172	static 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
184	static 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
199	static 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
212	static 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. */
224	static 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. */
245	static 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
252	static 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
261	static 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. */
271	const 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. */
285	static 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
298	struct 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
327	struct 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
349	smallint interface_opt_a; /* show all interfaces */
350
351	static struct interface int_list, int_last;
352
353
354	#if 0
355	/* like strcmp(), but knows about numbers */
356	except that the freshly added calls to xatoul() brf on ethernet aliases with
357	uClibc with e.g.: ife->name='lo' name='eth0:1'
358	static 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
382	static 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
408	static 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
451	static 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
457	static 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
465	static 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
499	static 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
508	static 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
554	static 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
597	static 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. */
607	static 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
681	static 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
699	static const struct hwtype unspec_hwtype = {
700	.name = "unspec",
701	.title = "UNSPEC",
702	.type = -1,
703	.print = UNSPEC_print
704	};
705
706	static 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. */
713	static 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
725	static int FAST_FUNC ether_input(const char bufp, struct sockaddr sap);
726
727	static const struct hwtype ether_hwtype = {
728	.name = "ether",
729	.title = "Ethernet",
730	.type = ARPHRD_ETHER,
731	.alen = ETH_ALEN,
732	.print = ether_print,
733	.input = ether_input
734	};
735
736	static unsigned hexchar2int(char c)
737	{
738	if (isdigit(c))
739	return c - '0';
740	c &= ~0x20; /* a -> A */
741	if ((unsigned)(c - 'A') <= 5)
742	return c - ('A' - 10);
743	return ~0U;
744	}
745
746	/* Input an Ethernet address and convert to binary. */
747	static int FAST_FUNC ether_input(const char bufp, struct sockaddr sap)
748	{
749	unsigned char *ptr;
750	char c;
751	int i;
752	unsigned val;
753
754	sap->sa_family = ether_hwtype.type;
755	ptr = (unsigned char*) sap->sa_data;
756
757	i = 0;
758	while ((*bufp != '\0') && (i < ETH_ALEN)) {
759	val = hexchar2int(bufp++) 0x10;
760	if (val > 0xff) {
761	errno = EINVAL;
762	return -1;
763	}
764	c = *bufp;
765	if (c == ':' \|\| c == 0)
766	val >>= 4;
767	else {
768	val \|= hexchar2int(c);
769	if (val > 0xff) {
770	errno = EINVAL;
771	return -1;
772	}
773	}
774	if (c != 0)
775	bufp++;
776	*ptr++ = (unsigned char) val;
777	i++;
778
779	/* We might get a semicolon here - not required. */
780	if (*bufp == ':') {
781	bufp++;
782	}
783	}
784	return 0;
785	}
786
787	static const struct hwtype ppp_hwtype = {
788	.name = "ppp",
789	.title = "Point-to-Point Protocol",
790	.type = ARPHRD_PPP
791	};
792
793	#if ENABLE_FEATURE_IPV6
794	static const struct hwtype sit_hwtype = {
795	.name = "sit",
796	.title = "IPv6-in-IPv4",
797	.type = ARPHRD_SIT,
798	.print = UNSPEC_print,
799	.suppress_null_addr = 1
800	};
801	#endif
802	#if ENABLE_FEATURE_HWIB
803	static const struct hwtype ib_hwtype = {
804	.name = "infiniband",
805	.title = "InfiniBand",
806	.type = ARPHRD_INFINIBAND,
807	.alen = INFINIBAND_ALEN,
808	.print = UNSPEC_print,
809	.input = in_ib,
810	};
811	#endif
812
813
814	static const struct hwtype *const hwtypes[] = {
815	&loop_hwtype,
816	&ether_hwtype,
817	&ppp_hwtype,
818	&unspec_hwtype,
819	#if ENABLE_FEATURE_IPV6
820	&sit_hwtype,
821	#endif
822	#if ENABLE_FEATURE_HWIB
823	&ib_hwtype,
824	#endif
825	NULL
826	};
827
828	#ifdef IFF_PORTSEL
829	static const char *const if_port_text[] = {
830	/* Keep in step with <linux/netdevice.h> */
831	"unknown",
832	"10base2",
833	"10baseT",
834	"AUI",
835	"100baseT",
836	"100baseTX",
837	"100baseFX",
838	NULL
839	};
840	#endif
841
842	/* Check our hardware type table for this type. */
843	const struct hwtype* FAST_FUNC get_hwtype(const char *name)
844	{
845	const struct hwtype const hwp;
846
847	hwp = hwtypes;
848	while (*hwp != NULL) {
849	if (!strcmp((*hwp)->name, name))
850	return (*hwp);
851	hwp++;
852	}
853	return NULL;
854	}
855
856	/* Check our hardware type table for this type. */
857	const struct hwtype* FAST_FUNC get_hwntype(int type)
858	{
859	const struct hwtype const hwp;
860
861	hwp = hwtypes;
862	while (*hwp != NULL) {
863	if ((*hwp)->type == type)
864	return *hwp;
865	hwp++;
866	}
867	return NULL;
868	}
869
870	/* return 1 if address is all zeros */
871	static int hw_null_address(const struct hwtype hw, void ap)
872	{
873	int i;
874	unsigned char address = (unsigned char ) ap;
875
876	for (i = 0; i < hw->alen; i++)
877	if (address[i])
878	return 0;
879	return 1;
880	}
881
882	static const char TRext[] ALIGN1 = "\0\0\0Ki\0Mi\0Gi\0Ti";
883
884	static void print_bytes_scaled(unsigned long long ull, const char *end)
885	{
886	unsigned long long int_part;
887	const char *ext;
888	unsigned int frac_part;
889	int i;
890
891	frac_part = 0;
892	ext = TRext;
893	int_part = ull;
894	i = 4;
895	do {
896	if (int_part >= 1024) {
897	frac_part = ((((unsigned int) int_part) & (1024-1)) * 10) / 1024;
898	int_part /= 1024;
899	ext += 3; /* KiB, MiB, GiB, TiB */
900	}
901	--i;
902	} while (i);
903
904	printf("X bytes:%llu (%llu.%u %sB)%s", ull, int_part, frac_part, ext, end);
905	}
906
907
908	#ifdef HAVE_AFINET6
909	#define IPV6_ADDR_ANY 0x0000U
910
911	#define IPV6_ADDR_UNICAST 0x0001U
912	#define IPV6_ADDR_MULTICAST 0x0002U
913	#define IPV6_ADDR_ANYCAST 0x0004U
914
915	#define IPV6_ADDR_LOOPBACK 0x0010U
916	#define IPV6_ADDR_LINKLOCAL 0x0020U
917	#define IPV6_ADDR_SITELOCAL 0x0040U
918
919	#define IPV6_ADDR_COMPATv4 0x0080U
920
921	#define IPV6_ADDR_SCOPE_MASK 0x00f0U
922
923	#define IPV6_ADDR_MAPPED 0x1000U
924	#define IPV6_ADDR_RESERVED 0x2000U /* reserved address space */
925
926
927	static void ife_print6(struct interface *ptr)
928	{
929	FILE *f;
930	char addr6[40], devname[20];
931	struct sockaddr_in6 sap;
932	int plen, scope, dad_status, if_idx;
933	char addr6p[8][5];
934
935	f = fopen_for_read(_PATH_PROCNET_IFINET6);
936	if (f == NULL)
937	return;
938
939	while (fscanf
940	(f, "%4s%4s%4s%4s%4s%4s%4s%4s %08x %02x %02x %02x %20s\n",
941	addr6p[0], addr6p[1], addr6p[2], addr6p[3], addr6p[4],
942	addr6p[5], addr6p[6], addr6p[7], &if_idx, &plen, &scope,
943	&dad_status, devname) != EOF
944	) {
945	if (!strcmp(devname, ptr->name)) {
946	sprintf(addr6, "%s:%s:%s:%s:%s:%s:%s:%s",
947	addr6p[0], addr6p[1], addr6p[2], addr6p[3],
948	addr6p[4], addr6p[5], addr6p[6], addr6p[7]);
949	inet_pton(AF_INET6, addr6,
950	(struct sockaddr *) &sap.sin6_addr);
951	sap.sin6_family = AF_INET6;
952	printf(" inet6 addr: %s/%d",
953	INET6_sprint((struct sockaddr *) &sap, 1),
954	plen);
955	printf(" Scope:");
956	switch (scope & IPV6_ADDR_SCOPE_MASK) {
957	case 0:
958	puts("Global");
959	break;
960	case IPV6_ADDR_LINKLOCAL:
961	puts("Link");
962	break;
963	case IPV6_ADDR_SITELOCAL:
964	puts("Site");
965	break;
966	case IPV6_ADDR_COMPATv4:
967	puts("Compat");
968	break;
969	case IPV6_ADDR_LOOPBACK:
970	puts("Host");
971	break;
972	default:
973	puts("Unknown");
974	}
975	}
976	}
977	fclose(f);
978	}
979	#else
980	#define ife_print6(a) ((void)0)
981	#endif
982
983	static void ife_print(struct interface *ptr)
984	{
985	const struct aftype *ap;
986	const struct hwtype *hw;
987	int hf;
988	int can_compress = 0;
989
990	ap = get_afntype(ptr->addr.sa_family);
991	if (ap == NULL)
992	ap = get_afntype(0);
993
994	hf = ptr->type;
995
996	if (hf == ARPHRD_CSLIP \|\| hf == ARPHRD_CSLIP6)
997	can_compress = 1;
998
999	hw = get_hwntype(hf);
1000	if (hw == NULL)
1001	hw = get_hwntype(-1);
1002
1003	printf("%-9s Link encap:%s ", ptr->name, hw->title);
1004	/* For some hardware types (eg Ash, ATM) we don't print the
1005	hardware address if it's null. */
1006	if (hw->print != NULL
1007	&& !(hw_null_address(hw, ptr->hwaddr) && hw->suppress_null_addr)
1008	) {
1009	printf("HWaddr %s ", hw->print((unsigned char *)ptr->hwaddr));
1010	}
1011	#ifdef IFF_PORTSEL
1012	if (ptr->flags & IFF_PORTSEL) {
1013	printf("Media:%s", if_port_text[ptr->map.port] /* [0] */);
1014	if (ptr->flags & IFF_AUTOMEDIA)
1015	printf("(auto)");
1016	}
1017	#endif
1018	bb_putchar('\n');
1019
1020	if (ptr->has_ip) {
1021	printf(" %s addr:%s ", ap->name,
1022	ap->sprint(&ptr->addr, 1));
1023	if (ptr->flags & IFF_POINTOPOINT) {
1024	printf(" P-t-P:%s ", ap->sprint(&ptr->dstaddr, 1));
1025	}
1026	if (ptr->flags & IFF_BROADCAST) {
1027	printf(" Bcast:%s ", ap->sprint(&ptr->broadaddr, 1));
1028	}
1029	printf(" Mask:%s\n", ap->sprint(&ptr->netmask, 1));
1030	}
1031
1032	ife_print6(ptr);
1033
1034	printf(" ");
1035	/* DONT FORGET TO ADD THE FLAGS IN ife_print_short, too */
1036
1037	if (ptr->flags == 0) {
1038	printf("[NO FLAGS] ");
1039	} else {
1040	static const char ife_print_flags_strs[] ALIGN1 =
1041	"UP\0"
1042	"BROADCAST\0"
1043	"DEBUG\0"
1044	"LOOPBACK\0"
1045	"POINTOPOINT\0"
1046	"NOTRAILERS\0"
1047	"RUNNING\0"
1048	"NOARP\0"
1049	"PROMISC\0"
1050	"ALLMULTI\0"
1051	"SLAVE\0"
1052	"MASTER\0"
1053	"MULTICAST\0"
1054	#ifdef HAVE_DYNAMIC
1055	"DYNAMIC\0"
1056	#endif
1057	;
1058	static const unsigned short ife_print_flags_mask[] ALIGN2 = {
1059	IFF_UP,
1060	IFF_BROADCAST,
1061	IFF_DEBUG,
1062	IFF_LOOPBACK,
1063	IFF_POINTOPOINT,
1064	IFF_NOTRAILERS,
1065	IFF_RUNNING,
1066	IFF_NOARP,
1067	IFF_PROMISC,
1068	IFF_ALLMULTI,
1069	IFF_SLAVE,
1070	IFF_MASTER,
1071	IFF_MULTICAST
1072	#ifdef HAVE_DYNAMIC
1073	,IFF_DYNAMIC
1074	#endif
1075	};
1076	const unsigned short *mask = ife_print_flags_mask;
1077	const char *str = ife_print_flags_strs;
1078	do {
1079	if (ptr->flags & *mask) {
1080	printf("%s ", str);
1081	}
1082	mask++;
1083	str += strlen(str) + 1;
1084	} while (*str);
1085	}
1086
1087	/* DONT FORGET TO ADD THE FLAGS IN ife_print_short */
1088	printf(" MTU:%d Metric:%d", ptr->mtu, ptr->metric ? ptr->metric : 1);
1089	#ifdef SIOCSKEEPALIVE
1090	if (ptr->outfill \|\| ptr->keepalive)
1091	printf(" Outfill:%d Keepalive:%d", ptr->outfill, ptr->keepalive);
1092	#endif
1093	bb_putchar('\n');
1094
1095	/* If needed, display the interface statistics. */
1096
1097	if (ptr->statistics_valid) {
1098	/* XXX: statistics are currently only printed for the primary address,
1099	* not for the aliases, although strictly speaking they're shared
1100	* by all addresses.
1101	*/
1102	printf(" ");
1103
1104	printf("RX packets:%llu errors:%lu dropped:%lu overruns:%lu frame:%lu\n",
1105	ptr->stats.rx_packets, ptr->stats.rx_errors,
1106	ptr->stats.rx_dropped, ptr->stats.rx_fifo_errors,
1107	ptr->stats.rx_frame_errors);
1108	if (can_compress)
1109	printf(" compressed:%lu\n",
1110	ptr->stats.rx_compressed);
1111	printf(" ");
1112	printf("TX packets:%llu errors:%lu dropped:%lu overruns:%lu carrier:%lu\n",
1113	ptr->stats.tx_packets, ptr->stats.tx_errors,
1114	ptr->stats.tx_dropped, ptr->stats.tx_fifo_errors,
1115	ptr->stats.tx_carrier_errors);
1116	printf(" collisions:%lu ", ptr->stats.collisions);
1117	if (can_compress)
1118	printf("compressed:%lu ", ptr->stats.tx_compressed);
1119	if (ptr->tx_queue_len != -1)
1120	printf("txqueuelen:%d ", ptr->tx_queue_len);
1121	printf("\n R");
1122	print_bytes_scaled(ptr->stats.rx_bytes, " T");
1123	print_bytes_scaled(ptr->stats.tx_bytes, "\n");
1124	}
1125
1126	if (ptr->map.irq \|\| ptr->map.mem_start
1127	\|\| ptr->map.dma \|\| ptr->map.base_addr
1128	) {
1129	printf(" ");
1130	if (ptr->map.irq)
1131	printf("Interrupt:%d ", ptr->map.irq);
1132	if (ptr->map.base_addr >= 0x100) /* Only print devices using it for I/O maps */
1133	printf("Base address:0x%lx ",
1134	(unsigned long) ptr->map.base_addr);
1135	if (ptr->map.mem_start) {
1136	printf("Memory:%lx-%lx ", ptr->map.mem_start,
1137	ptr->map.mem_end);
1138	}
1139	if (ptr->map.dma)
1140	printf("DMA chan:%x ", ptr->map.dma);
1141	bb_putchar('\n');
1142	}
1143	bb_putchar('\n');
1144	}
1145
1146	static int do_if_print(struct interface ife) /, int opt_a)/
1147	{
1148	int res;
1149
1150	res = do_if_fetch(ife);
1151	if (res >= 0) {
1152	if ((ife->flags & IFF_UP) \|\| interface_opt_a)
1153	ife_print(ife);
1154	}
1155	return res;
1156	}
1157
1158	static struct interface lookup_interface(char name)
1159	{
1160	struct interface *ife = NULL;
1161
1162	if (if_readlist_proc(name) < 0)
1163	return NULL;
1164	ife = add_interface(name);
1165	return ife;
1166	}
1167
1168	#ifdef UNUSED
1169	static int for_all_interfaces(int (doit) (struct interface , void *),
1170	void *cookie)
1171	{
1172	struct interface *ife;
1173
1174	if (!int_list && (if_readlist() < 0))
1175	return -1;
1176	for (ife = int_list; ife; ife = ife->next) {
1177	int err = doit(ife, cookie);
1178	if (err)
1179	return err;
1180	}
1181	return 0;
1182	}
1183	#endif
1184
1185	/* for ipv4 add/del modes */
1186	static int if_print(char *ifname)
1187	{
1188	struct interface *ife;
1189	int res;
1190
1191	if (!ifname) {
1192	/res = for_all_interfaces(do_if_print, &interface_opt_a);/
1193	if (!int_list && (if_readlist() < 0))
1194	return -1;
1195	for (ife = int_list; ife; ife = ife->next) {
1196	int err = do_if_print(ife); /, &interface_opt_a);/
1197	if (err)
1198	return err;
1199	}
1200	return 0;
1201	}
1202	ife = lookup_interface(ifname);
1203	res = do_if_fetch(ife);
1204	if (res >= 0)
1205	ife_print(ife);
1206	return res;
1207	}
1208
1209	#if ENABLE_FEATURE_HWIB
1210	/* Input an Infiniband address and convert to binary. */
1211	int FAST_FUNC in_ib(const char bufp, struct sockaddr sap)
1212	{
1213	sap->sa_family = ib_hwtype.type;
1214	//TODO: error check?
1215	hex2bin((char*)sap->sa_data, bufp, INFINIBAND_ALEN);
1216	# ifdef HWIB_DEBUG
1217	fprintf(stderr, "in_ib(%s): %s\n", bufp, UNSPEC_print(sap->sa_data));
1218	# endif
1219	return 0;
1220	}
1221	#endif
1222
1223	int FAST_FUNC display_interfaces(char *ifname)
1224	{
1225	int status;
1226
1227	status = if_print(ifname);
1228
1229	return (status < 0); /* status < 0 == 1 -- error */
1230	}

Note: See TracBrowser for help on using the repository browser.

Context Navigation

source: MondoRescue/branches/3.2/mindi-busybox/networking/interface.c@ 3232

Download in other formats: