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interface.c@ 1765

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Last change on this file since 1765 was 1765, checked in by Bruno Cornec, 16 years ago
Update to busybox 1.7.2
File size: 27.7 KB

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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 tarball for details.
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 <net/if.h>
35	#include <net/if_arp.h>
36	#include "inet_common.h"
37	#include "libbb.h"
38
39	#if ENABLE_FEATURE_IPV6
40	# define HAVE_AFINET6 1
41	#else
42	# undef HAVE_AFINET6
43	#endif
44
45	#define _PATH_PROCNET_DEV "/proc/net/dev"
46	#define _PATH_PROCNET_IFINET6 "/proc/net/if_inet6"
47
48	#ifdef HAVE_AFINET6
49
50	#ifndef _LINUX_IN6_H
51	/*
52	* This is in linux/include/net/ipv6.h.
53	*/
54
55	struct in6_ifreq {
56	struct in6_addr ifr6_addr;
57	uint32_t ifr6_prefixlen;
58	unsigned int ifr6_ifindex;
59	};
60
61	#endif
62
63	#endif /* HAVE_AFINET6 */
64
65	/* Defines for glibc2.0 users. */
66	#ifndef SIOCSIFTXQLEN
67	#define SIOCSIFTXQLEN 0x8943
68	#define SIOCGIFTXQLEN 0x8942
69	#endif
70
71	/* ifr_qlen is ifru_ivalue, but it isn't present in 2.0 kernel headers */
72	#ifndef ifr_qlen
73	#define ifr_qlen ifr_ifru.ifru_mtu
74	#endif
75
76	#ifndef HAVE_TXQUEUELEN
77	#define HAVE_TXQUEUELEN 1
78	#endif
79
80	#ifndef IFF_DYNAMIC
81	#define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses */
82	#endif
83
84	/* Display an Internet socket address. */
85	static const char INET_sprint(struct sockaddr sap, int numeric)
86	{
87	static char *buff;
88
89	free(buff);
90	if (sap->sa_family == 0xFFFF \|\| sap->sa_family == 0)
91	return "[NONE SET]";
92	buff = INET_rresolve((struct sockaddr_in *) sap, numeric, 0xffffff00);
93	return buff;
94	}
95
96	#ifdef UNUSED_AND_BUGGY
97	static int INET_getsock(char bufp, struct sockaddr sap)
98	{
99	char sp = bufp, bp;
100	unsigned int i;
101	unsigned val;
102	struct sockaddr_in *sock_in;
103
104	sock_in = (struct sockaddr_in *) sap;
105	sock_in->sin_family = AF_INET;
106	sock_in->sin_port = 0;
107
108	val = 0;
109	bp = (char *) &val;
110	for (i = 0; i < sizeof(sock_in->sin_addr.s_addr); i++) {
111	sp = toupper(sp);
112
113	if ((unsigned)(*sp - 'A') <= 5)
114	bp[i] \|= (int) (*sp - ('A' - 10));
115	else if (isdigit(*sp))
116	bp[i] \|= (int) (*sp - '0');
117	else
118	return -1;
119
120	bp[i] <<= 4;
121	sp++;
122	sp = toupper(sp);
123
124	if ((unsigned)(*sp - 'A') <= 5)
125	bp[i] \|= (int) (*sp - ('A' - 10));
126	else if (isdigit(*sp))
127	bp[i] \|= (int) (*sp - '0');
128	else
129	return -1;
130
131	sp++;
132	}
133	sock_in->sin_addr.s_addr = htonl(val);
134
135	return (sp - bufp);
136	}
137	#endif
138
139	static int INET_input(/int type,/ const char bufp, struct sockaddr sap)
140	{
141	return INET_resolve(bufp, (struct sockaddr_in *) sap, 0);
142	/*
143	switch (type) {
144	case 1:
145	return (INET_getsock(bufp, sap));
146	case 256:
147	return (INET_resolve(bufp, (struct sockaddr_in *) sap, 1));
148	default:
149	return (INET_resolve(bufp, (struct sockaddr_in *) sap, 0));
150	}
151	*/
152	}
153
154	static const struct aftype inet_aftype = {
155	.name = "inet",
156	.title = "DARPA Internet",
157	.af = AF_INET,
158	.alen = 4,
159	.sprint = INET_sprint,
160	.input = INET_input,
161	};
162
163	#ifdef HAVE_AFINET6
164
165	/* Display an Internet socket address. */
166	/* dirty! struct sockaddr usually doesn't suffer for inet6 addresses, fst. */
167	static const char INET6_sprint(struct sockaddr sap, int numeric)
168	{
169	static char *buff;
170
171	free(buff);
172	if (sap->sa_family == 0xFFFF \|\| sap->sa_family == 0)
173	return "[NONE SET]";
174	buff = INET6_rresolve((struct sockaddr_in6 *) sap, numeric);
175	return buff;
176	}
177
178	#ifdef UNUSED
179	static int INET6_getsock(char bufp, struct sockaddr sap)
180	{
181	struct sockaddr_in6 *sin6;
182
183	sin6 = (struct sockaddr_in6 *) sap;
184	sin6->sin6_family = AF_INET6;
185	sin6->sin6_port = 0;
186
187	if (inet_pton(AF_INET6, bufp, sin6->sin6_addr.s6_addr) <= 0)
188	return -1;
189
190	return 16; /* ?;) */
191	}
192	#endif
193
194	static int INET6_input(/int type,/ const char bufp, struct sockaddr sap)
195	{
196	return INET6_resolve(bufp, (struct sockaddr_in6 *) sap);
197	/*
198	switch (type) {
199	case 1:
200	return (INET6_getsock(bufp, sap));
201	default:
202	return (INET6_resolve(bufp, (struct sockaddr_in6 *) sap));
203	}
204	*/
205	}
206
207	static const struct aftype inet6_aftype = {
208	.name = "inet6",
209	.title = "IPv6",
210	.af = AF_INET6,
211	.alen = sizeof(struct in6_addr),
212	.sprint = INET6_sprint,
213	.input = INET6_input,
214	};
215
216	#endif /* HAVE_AFINET6 */
217
218	/* Display an UNSPEC address. */
219	static char UNSPEC_print(unsigned char ptr)
220	{
221	static char *buff;
222
223	char *pos;
224	unsigned int i;
225
226	if (!buff);
227	buff = xmalloc(sizeof(struct sockaddr) * 3 + 1);
228	pos = buff;
229	for (i = 0; i < sizeof(struct sockaddr); i++) {
230	/* careful -- not every libc's sprintf returns # bytes written */
231	sprintf(pos, "%02X-", (*ptr++ & 0377));
232	pos += 3;
233	}
234	/* Erase trailing "-". Works as long as sizeof(struct sockaddr) != 0 */
235	*--pos = '\0';
236	return buff;
237	}
238
239	/* Display an UNSPEC socket address. */
240	static const char UNSPEC_sprint(struct sockaddr sap, int numeric)
241	{
242	if (sap->sa_family == 0xFFFF \|\| sap->sa_family == 0)
243	return "[NONE SET]";
244	return UNSPEC_print((unsigned char *)sap->sa_data);
245	}
246
247	static const struct aftype unspec_aftype = {
248	.name = "unspec",
249	.title = "UNSPEC",
250	.af = AF_UNSPEC,
251	.alen = 0,
252	.print = UNSPEC_print,
253	.sprint = UNSPEC_sprint,
254	};
255
256	static const struct aftype *const aftypes[] = {
257	&inet_aftype,
258	#ifdef HAVE_AFINET6
259	&inet6_aftype,
260	#endif
261	&unspec_aftype,
262	NULL
263	};
264
265	/* Check our protocol family table for this family. */
266	const struct aftype get_aftype(const char name)
267	{
268	const struct aftype const afp;
269
270	afp = aftypes;
271	while (*afp != NULL) {
272	if (!strcmp((*afp)->name, name))
273	return (*afp);
274	afp++;
275	}
276	return NULL;
277	}
278
279	/* Check our protocol family table for this family. */
280	static const struct aftype *get_afntype(int af)
281	{
282	const struct aftype const afp;
283
284	afp = aftypes;
285	while (*afp != NULL) {
286	if ((*afp)->af == af)
287	return *afp;
288	afp++;
289	}
290	return NULL;
291	}
292
293	struct user_net_device_stats {
294	unsigned long long rx_packets; /* total packets received */
295	unsigned long long tx_packets; /* total packets transmitted */
296	unsigned long long rx_bytes; /* total bytes received */
297	unsigned long long tx_bytes; /* total bytes transmitted */
298	unsigned long rx_errors; /* bad packets received */
299	unsigned long tx_errors; /* packet transmit problems */
300	unsigned long rx_dropped; /* no space in linux buffers */
301	unsigned long tx_dropped; /* no space available in linux */
302	unsigned long rx_multicast; /* multicast packets received */
303	unsigned long rx_compressed;
304	unsigned long tx_compressed;
305	unsigned long collisions;
306
307	/* detailed rx_errors: */
308	unsigned long rx_length_errors;
309	unsigned long rx_over_errors; /* receiver ring buff overflow */
310	unsigned long rx_crc_errors; /* recved pkt with crc error */
311	unsigned long rx_frame_errors; /* recv'd frame alignment error */
312	unsigned long rx_fifo_errors; /* recv'r fifo overrun */
313	unsigned long rx_missed_errors; /* receiver missed packet */
314	/* detailed tx_errors */
315	unsigned long tx_aborted_errors;
316	unsigned long tx_carrier_errors;
317	unsigned long tx_fifo_errors;
318	unsigned long tx_heartbeat_errors;
319	unsigned long tx_window_errors;
320	};
321
322	struct interface {
323	struct interface next, prev;
324	char name[IFNAMSIZ]; /* interface name */
325	short type; /* if type */
326	short flags; /* various flags */
327	int metric; /* routing metric */
328	int mtu; /* MTU value */
329	int tx_queue_len; /* transmit queue length */
330	struct ifmap map; /* hardware setup */
331	struct sockaddr addr; /* IP address */
332	struct sockaddr dstaddr; /* P-P IP address */
333	struct sockaddr broadaddr; /* IP broadcast address */
334	struct sockaddr netmask; /* IP network mask */
335	int has_ip;
336	char hwaddr[32]; /* HW address */
337	int statistics_valid;
338	struct user_net_device_stats stats; /* statistics */
339	int keepalive; /* keepalive value for SLIP */
340	int outfill; /* outfill value for SLIP */
341	};
342
343
344	smallint interface_opt_a; /* show all interfaces */
345
346	static struct interface int_list, int_last;
347
348
349	#if 0
350	/* like strcmp(), but knows about numbers */
351	except that the freshly added calls to xatoul() brf on ethernet aliases with
352	uClibc with e.g.: ife->name='lo' name='eth0:1'
353	static int nstrcmp(const char a, const char b)
354	{
355	const char *a_ptr = a;
356	const char *b_ptr = b;
357
358	while (a == b) {
359	if (*a == '\0') {
360	return 0;
361	}
362	if (!isdigit(a) && isdigit((a+1))) {
363	a_ptr = a+1;
364	b_ptr = b+1;
365	}
366	a++;
367	b++;
368	}
369
370	if (isdigit(a) && isdigit(b)) {
371	return xatoul(a_ptr) > xatoul(b_ptr) ? 1 : -1;
372	}
373	return a - b;
374	}
375	#endif
376
377	static struct interface add_interface(char name)
378	{
379	struct interface ife, nextp, new;
380
381	for (ife = int_last; ife; ife = ife->prev) {
382	int n = /n/strcmp(ife->name, name);
383
384	if (n == 0)
385	return ife;
386	if (n < 0)
387	break;
388	}
389
390	new = xzalloc(sizeof(*new));
391	safe_strncpy(new->name, name, IFNAMSIZ);
392	nextp = ife ? &ife->next : &int_list;
393	new->prev = ife;
394	new->next = *nextp;
395	if (new->next)
396	new->next->prev = new;
397	else
398	int_last = new;
399	*nextp = new;
400	return new;
401	}
402
403	static char get_name(char name, char *p)
404	{
405	/* Extract <name> from nul-terminated p where p matches
406	<name>: after leading whitespace.
407	If match is not made, set name empty and return unchanged p */
408	int namestart=0, nameend=0;
409	while (isspace(p[namestart]))
410	namestart++;
411	nameend=namestart;
412	while (p[nameend] && p[nameend]!=':' && !isspace(p[nameend]))
413	nameend++;
414	if (p[nameend]==':') {
415	if ((nameend-namestart)<IFNAMSIZ) {
416	memcpy(name,&p[namestart],nameend-namestart);
417	name[nameend-namestart]='\0';
418	p=&p[nameend];
419	} else {
420	/* Interface name too large */
421	name[0]='\0';
422	}
423	} else {
424	/* trailing ':' not found - return empty */
425	name[0]='\0';
426	}
427	return p + 1;
428	}
429
430	/* If scanf supports size qualifiers for %n conversions, then we can
431	* use a modified fmt that simply stores the position in the fields
432	* having no associated fields in the proc string. Of course, we need
433	* to zero them again when we're done. But that is smaller than the
434	* old approach of multiple scanf occurrences with large numbers of
435	* args. */
436
437	/* static const char const ss_fmt[] = { /
438	/* "%lln%llu%lu%lu%lu%lu%ln%ln%lln%llu%lu%lu%lu%lu%lu", */
439	/* "%llu%llu%lu%lu%lu%lu%ln%ln%llu%llu%lu%lu%lu%lu%lu", */
440	/* "%llu%llu%lu%lu%lu%lu%lu%lu%llu%llu%lu%lu%lu%lu%lu%lu" */
441	/* }; */
442
443	/* Lie about the size of the int pointed to for %n. */
444	#if INT_MAX == LONG_MAX
445	static const char *const ss_fmt[] = {
446	"%n%llu%u%u%u%u%n%n%n%llu%u%u%u%u%u",
447	"%llu%llu%u%u%u%u%n%n%llu%llu%u%u%u%u%u",
448	"%llu%llu%u%u%u%u%u%u%llu%llu%u%u%u%u%u%u"
449	};
450	#else
451	static const char *const ss_fmt[] = {
452	"%n%llu%lu%lu%lu%lu%n%n%n%llu%lu%lu%lu%lu%lu",
453	"%llu%llu%lu%lu%lu%lu%n%n%llu%llu%lu%lu%lu%lu%lu",
454	"%llu%llu%lu%lu%lu%lu%lu%lu%llu%llu%lu%lu%lu%lu%lu%lu"
455	};
456
457	#endif
458
459	static void get_dev_fields(char bp, struct interface ife, int procnetdev_vsn)
460	{
461	memset(&ife->stats, 0, sizeof(struct user_net_device_stats));
462
463	sscanf(bp, ss_fmt[procnetdev_vsn],
464	&ife->stats.rx_bytes, /* missing for 0 */
465	&ife->stats.rx_packets,
466	&ife->stats.rx_errors,
467	&ife->stats.rx_dropped,
468	&ife->stats.rx_fifo_errors,
469	&ife->stats.rx_frame_errors,
470	&ife->stats.rx_compressed, /* missing for <= 1 */
471	&ife->stats.rx_multicast, /* missing for <= 1 */
472	&ife->stats.tx_bytes, /* missing for 0 */
473	&ife->stats.tx_packets,
474	&ife->stats.tx_errors,
475	&ife->stats.tx_dropped,
476	&ife->stats.tx_fifo_errors,
477	&ife->stats.collisions,
478	&ife->stats.tx_carrier_errors,
479	&ife->stats.tx_compressed /* missing for <= 1 */
480	);
481
482	if (procnetdev_vsn <= 1) {
483	if (procnetdev_vsn == 0) {
484	ife->stats.rx_bytes = 0;
485	ife->stats.tx_bytes = 0;
486	}
487	ife->stats.rx_multicast = 0;
488	ife->stats.rx_compressed = 0;
489	ife->stats.tx_compressed = 0;
490	}
491	}
492
493	static inline int procnetdev_version(char *buf)
494	{
495	if (strstr(buf, "compressed"))
496	return 2;
497	if (strstr(buf, "bytes"))
498	return 1;
499	return 0;
500	}
501
502	static int if_readconf(void)
503	{
504	int numreqs = 30;
505	struct ifconf ifc;
506	struct ifreq *ifr;
507	int n, err = -1;
508	int skfd;
509
510	ifc.ifc_buf = NULL;
511
512	/* SIOCGIFCONF currently seems to only work properly on AF_INET sockets
513	(as of 2.1.128) */
514	skfd = socket(AF_INET, SOCK_DGRAM, 0);
515	if (skfd < 0) {
516	bb_perror_msg("error: no inet socket available");
517	return -1;
518	}
519
520	for (;;) {
521	ifc.ifc_len = sizeof(struct ifreq) * numreqs;
522	ifc.ifc_buf = xrealloc(ifc.ifc_buf, ifc.ifc_len);
523
524	if (ioctl_or_warn(skfd, SIOCGIFCONF, &ifc) < 0) {
525	goto out;
526	}
527	if (ifc.ifc_len == sizeof(struct ifreq) * numreqs) {
528	/* assume it overflowed and try again */
529	numreqs += 10;
530	continue;
531	}
532	break;
533	}
534
535	ifr = ifc.ifc_req;
536	for (n = 0; n < ifc.ifc_len; n += sizeof(struct ifreq)) {
537	add_interface(ifr->ifr_name);
538	ifr++;
539	}
540	err = 0;
541
542	out:
543	close(skfd);
544	free(ifc.ifc_buf);
545	return err;
546	}
547
548	static int if_readlist_proc(char *target)
549	{
550	static smallint proc_read;
551
552	FILE *fh;
553	char buf[512];
554	struct interface *ife;
555	int err, procnetdev_vsn;
556
557	if (proc_read)
558	return 0;
559	if (!target)
560	proc_read = 1;
561
562	fh = fopen(_PATH_PROCNET_DEV, "r");
563	if (!fh) {
564	bb_perror_msg("warning: cannot open %s, limiting output", _PATH_PROCNET_DEV);
565	return if_readconf();
566	}
567	fgets(buf, sizeof buf, fh); /* eat line */
568	fgets(buf, sizeof buf, fh);
569
570	procnetdev_vsn = procnetdev_version(buf);
571
572	err = 0;
573	while (fgets(buf, sizeof buf, fh)) {
574	char *s, name[128];
575
576	s = get_name(name, buf);
577	ife = add_interface(name);
578	get_dev_fields(s, ife, procnetdev_vsn);
579	ife->statistics_valid = 1;
580	if (target && !strcmp(target, name))
581	break;
582	}
583	if (ferror(fh)) {
584	bb_perror_msg(_PATH_PROCNET_DEV);
585	err = -1;
586	proc_read = 0;
587	}
588	fclose(fh);
589	return err;
590	}
591
592	static int if_readlist(void)
593	{
594	int err = if_readlist_proc(NULL);
595	/* Needed in order to get ethN:M aliases */
596	if (!err)
597	err = if_readconf();
598	return err;
599	}
600
601	/* Fetch the interface configuration from the kernel. */
602	static int if_fetch(struct interface *ife)
603	{
604	struct ifreq ifr;
605	char *ifname = ife->name;
606	int skfd;
607
608	skfd = xsocket(AF_INET, SOCK_DGRAM, 0);
609
610	strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
611	if (ioctl(skfd, SIOCGIFFLAGS, &ifr) < 0) {
612	close(skfd);
613	return -1;
614	}
615	ife->flags = ifr.ifr_flags;
616
617	strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
618	memset(ife->hwaddr, 0, 32);
619	if (ioctl(skfd, SIOCGIFHWADDR, &ifr) >= 0)
620	memcpy(ife->hwaddr, ifr.ifr_hwaddr.sa_data, 8);
621
622	ife->type = ifr.ifr_hwaddr.sa_family;
623
624	strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
625	ife->metric = 0;
626	if (ioctl(skfd, SIOCGIFMETRIC, &ifr) >= 0)
627	ife->metric = ifr.ifr_metric;
628
629	strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
630	ife->mtu = 0;
631	if (ioctl(skfd, SIOCGIFMTU, &ifr) >= 0)
632	ife->mtu = ifr.ifr_mtu;
633
634	memset(&ife->map, 0, sizeof(struct ifmap));
635	#ifdef SIOCGIFMAP
636	strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
637	if (ioctl(skfd, SIOCGIFMAP, &ifr) == 0)
638	ife->map = ifr.ifr_map;
639	#endif
640
641	#ifdef HAVE_TXQUEUELEN
642	strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
643	ife->tx_queue_len = -1; /* unknown value */
644	if (ioctl(skfd, SIOCGIFTXQLEN, &ifr) >= 0)
645	ife->tx_queue_len = ifr.ifr_qlen;
646	#else
647	ife->tx_queue_len = -1; /* unknown value */
648	#endif
649
650	strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
651	ifr.ifr_addr.sa_family = AF_INET;
652	memset(&ife->addr, 0, sizeof(struct sockaddr));
653	if (ioctl(skfd, SIOCGIFADDR, &ifr) == 0) {
654	ife->has_ip = 1;
655	ife->addr = ifr.ifr_addr;
656	strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
657	memset(&ife->dstaddr, 0, sizeof(struct sockaddr));
658	if (ioctl(skfd, SIOCGIFDSTADDR, &ifr) >= 0)
659	ife->dstaddr = ifr.ifr_dstaddr;
660
661	strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
662	memset(&ife->broadaddr, 0, sizeof(struct sockaddr));
663	if (ioctl(skfd, SIOCGIFBRDADDR, &ifr) >= 0)
664	ife->broadaddr = ifr.ifr_broadaddr;
665
666	strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
667	memset(&ife->netmask, 0, sizeof(struct sockaddr));
668	if (ioctl(skfd, SIOCGIFNETMASK, &ifr) >= 0)
669	ife->netmask = ifr.ifr_netmask;
670	}
671
672	close(skfd);
673	return 0;
674	}
675
676
677	static int do_if_fetch(struct interface *ife)
678	{
679	if (if_fetch(ife) < 0) {
680	const char *errmsg;
681
682	if (errno == ENODEV) {
683	/* Give better error message for this case. */
684	errmsg = "Device not found";
685	} else {
686	errmsg = strerror(errno);
687	}
688	bb_error_msg("%s: error fetching interface information: %s",
689	ife->name, errmsg);
690	return -1;
691	}
692	return 0;
693	}
694
695	static const struct hwtype unspec_hwtype = {
696	.name = "unspec",
697	.title = "UNSPEC",
698	.type = -1,
699	.print = UNSPEC_print
700	};
701
702	static const struct hwtype loop_hwtype = {
703	.name = "loop",
704	.title = "Local Loopback",
705	.type = ARPHRD_LOOPBACK
706	};
707
708	#include <net/if_arp.h>
709
710	#if (defined(__GLIBC__) && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1) \|\| defined(_NEWLIB_VERSION)
711	#include <net/ethernet.h>
712	#else
713	#include <linux/if_ether.h>
714	#endif
715
716	/* Display an Ethernet address in readable format. */
717	static char pr_ether(unsigned char ptr)
718	{
719	static char *buff;
720
721	free(buff);
722	buff = xasprintf("%02X:%02X:%02X:%02X:%02X:%02X",
723	(ptr[0] & 0377), (ptr[1] & 0377), (ptr[2] & 0377),
724	(ptr[3] & 0377), (ptr[4] & 0377), (ptr[5] & 0377)
725	);
726	return buff;
727	}
728
729	static int in_ether(const char bufp, struct sockaddr sap);
730
731	static const struct hwtype ether_hwtype = {
732	.name = "ether",
733	.title = "Ethernet",
734	.type = ARPHRD_ETHER,
735	.alen = ETH_ALEN,
736	.print = pr_ether,
737	.input = in_ether
738	};
739
740	static unsigned hexchar2int(char c)
741	{
742	if (isdigit(c))
743	return c - '0';
744	c &= ~0x20; /* a -> A */
745	if ((unsigned)(c - 'A') <= 5)
746	return c - ('A' - 10);
747	return ~0U;
748	}
749
750	/* Input an Ethernet address and convert to binary. */
751	static int in_ether(const char bufp, struct sockaddr sap)
752	{
753	unsigned char *ptr;
754	char c;
755	int i;
756	unsigned val;
757
758	sap->sa_family = ether_hwtype.type;
759	ptr = (unsigned char*) sap->sa_data;
760
761	i = 0;
762	while ((*bufp != '\0') && (i < ETH_ALEN)) {
763	val = hexchar2int(bufp++) 0x10;
764	if (val > 0xff) {
765	errno = EINVAL;
766	return -1;
767	}
768	c = *bufp;
769	if (c == ':' \|\| c == 0)
770	val >>= 4;
771	else {
772	val \|= hexchar2int(c);
773	if (val > 0xff) {
774	errno = EINVAL;
775	return -1;
776	}
777	}
778	if (c != 0)
779	bufp++;
780	*ptr++ = (unsigned char) val;
781	i++;
782
783	/* We might get a semicolon here - not required. */
784	if (*bufp == ':') {
785	bufp++;
786	}
787	}
788	return 0;
789	}
790
791	#include <net/if_arp.h>
792
793	static const struct hwtype ppp_hwtype = {
794	.name = "ppp",
795	.title = "Point-to-Point Protocol",
796	.type = ARPHRD_PPP
797	};
798
799	#if ENABLE_FEATURE_IPV6
800	static const struct hwtype sit_hwtype = {
801	.name = "sit",
802	.title = "IPv6-in-IPv4",
803	.type = ARPHRD_SIT,
804	.print = UNSPEC_print,
805	.suppress_null_addr = 1
806	};
807	#endif
808
809	static const struct hwtype *const hwtypes[] = {
810	&loop_hwtype,
811	&ether_hwtype,
812	&ppp_hwtype,
813	&unspec_hwtype,
814	#if ENABLE_FEATURE_IPV6
815	&sit_hwtype,
816	#endif
817	NULL
818	};
819
820	#ifdef IFF_PORTSEL
821	static const char *const if_port_text[] = {
822	/* Keep in step with <linux/netdevice.h> */
823	"unknown",
824	"10base2",
825	"10baseT",
826	"AUI",
827	"100baseT",
828	"100baseTX",
829	"100baseFX",
830	NULL
831	};
832	#endif
833
834	/* Check our hardware type table for this type. */
835	const struct hwtype get_hwtype(const char name)
836	{
837	const struct hwtype const hwp;
838
839	hwp = hwtypes;
840	while (*hwp != NULL) {
841	if (!strcmp((*hwp)->name, name))
842	return (*hwp);
843	hwp++;
844	}
845	return NULL;
846	}
847
848	/* Check our hardware type table for this type. */
849	const struct hwtype *get_hwntype(int type)
850	{
851	const struct hwtype const hwp;
852
853	hwp = hwtypes;
854	while (*hwp != NULL) {
855	if ((*hwp)->type == type)
856	return *hwp;
857	hwp++;
858	}
859	return NULL;
860	}
861
862	/* return 1 if address is all zeros */
863	static int hw_null_address(const struct hwtype hw, void ap)
864	{
865	unsigned int i;
866	unsigned char address = (unsigned char ) ap;
867
868	for (i = 0; i < hw->alen; i++)
869	if (address[i])
870	return 0;
871	return 1;
872	}
873
874	static const char TRext[] ALIGN1 = "\0\0\0Ki\0Mi\0Gi\0Ti";
875
876	static void print_bytes_scaled(unsigned long long ull, const char *end)
877	{
878	unsigned long long int_part;
879	const char *ext;
880	unsigned int frac_part;
881	int i;
882
883	frac_part = 0;
884	ext = TRext;
885	int_part = ull;
886	i = 4;
887	do {
888	if (int_part >= 1024) {
889	frac_part = ((((unsigned int) int_part) & (1024-1)) * 10) / 1024;
890	int_part /= 1024;
891	ext += 3; /* KiB, MiB, GiB, TiB */
892	}
893	--i;
894	} while (i);
895
896	printf("X bytes:%llu (%llu.%u %sB)%s", ull, int_part, frac_part, ext, end);
897	}
898
899	static void ife_print(struct interface *ptr)
900	{
901	const struct aftype *ap;
902	const struct hwtype *hw;
903	int hf;
904	int can_compress = 0;
905
906	#ifdef HAVE_AFINET6
907	FILE *f;
908	char addr6[40], devname[20];
909	struct sockaddr_in6 sap;
910	int plen, scope, dad_status, if_idx;
911	char addr6p[8][5];
912	#endif
913
914	ap = get_afntype(ptr->addr.sa_family);
915	if (ap == NULL)
916	ap = get_afntype(0);
917
918	hf = ptr->type;
919
920	if (hf == ARPHRD_CSLIP \|\| hf == ARPHRD_CSLIP6)
921	can_compress = 1;
922
923	hw = get_hwntype(hf);
924	if (hw == NULL)
925	hw = get_hwntype(-1);
926
927	printf("%-9.9s Link encap:%s ", ptr->name, hw->title);
928	/* For some hardware types (eg Ash, ATM) we don't print the
929	hardware address if it's null. */
930	if (hw->print != NULL && (!(hw_null_address(hw, ptr->hwaddr) &&
931	hw->suppress_null_addr)))
932	printf("HWaddr %s ", hw->print((unsigned char *)ptr->hwaddr));
933	#ifdef IFF_PORTSEL
934	if (ptr->flags & IFF_PORTSEL) {
935	printf("Media:%s", if_port_text[ptr->map.port] /* [0] */);
936	if (ptr->flags & IFF_AUTOMEDIA)
937	printf("(auto)");
938	}
939	#endif
940	puts("");
941
942	if (ptr->has_ip) {
943	printf(" %s addr:%s ", ap->name,
944	ap->sprint(&ptr->addr, 1));
945	if (ptr->flags & IFF_POINTOPOINT) {
946	printf(" P-t-P:%s ", ap->sprint(&ptr->dstaddr, 1));
947	}
948	if (ptr->flags & IFF_BROADCAST) {
949	printf(" Bcast:%s ", ap->sprint(&ptr->broadaddr, 1));
950	}
951	printf(" Mask:%s\n", ap->sprint(&ptr->netmask, 1));
952	}
953
954	#ifdef HAVE_AFINET6
955
956	#define IPV6_ADDR_ANY 0x0000U
957
958	#define IPV6_ADDR_UNICAST 0x0001U
959	#define IPV6_ADDR_MULTICAST 0x0002U
960	#define IPV6_ADDR_ANYCAST 0x0004U
961
962	#define IPV6_ADDR_LOOPBACK 0x0010U
963	#define IPV6_ADDR_LINKLOCAL 0x0020U
964	#define IPV6_ADDR_SITELOCAL 0x0040U
965
966	#define IPV6_ADDR_COMPATv4 0x0080U
967
968	#define IPV6_ADDR_SCOPE_MASK 0x00f0U
969
970	#define IPV6_ADDR_MAPPED 0x1000U
971	#define IPV6_ADDR_RESERVED 0x2000U /* reserved address space */
972
973	f = fopen(_PATH_PROCNET_IFINET6, "r");
974	if (f != NULL) {
975	while (fscanf
976	(f, "%4s%4s%4s%4s%4s%4s%4s%4s %08x %02x %02x %02x %20s\n",
977	addr6p[0], addr6p[1], addr6p[2], addr6p[3], addr6p[4],
978	addr6p[5], addr6p[6], addr6p[7], &if_idx, &plen, &scope,
979	&dad_status, devname) != EOF
980	) {
981	if (!strcmp(devname, ptr->name)) {
982	sprintf(addr6, "%s:%s:%s:%s:%s:%s:%s:%s",
983	addr6p[0], addr6p[1], addr6p[2], addr6p[3],
984	addr6p[4], addr6p[5], addr6p[6], addr6p[7]);
985	inet_pton(AF_INET6, addr6,
986	(struct sockaddr *) &sap.sin6_addr);
987	sap.sin6_family = AF_INET6;
988	printf(" inet6 addr: %s/%d",
989	INET6_sprint((struct sockaddr *) &sap, 1),
990	plen);
991	printf(" Scope:");
992	switch (scope & IPV6_ADDR_SCOPE_MASK) {
993	case 0:
994	puts("Global");
995	break;
996	case IPV6_ADDR_LINKLOCAL:
997	puts("Link");
998	break;
999	case IPV6_ADDR_SITELOCAL:
1000	puts("Site");
1001	break;
1002	case IPV6_ADDR_COMPATv4:
1003	puts("Compat");
1004	break;
1005	case IPV6_ADDR_LOOPBACK:
1006	puts("Host");
1007	break;
1008	default:
1009	puts("Unknown");
1010	}
1011	}
1012	}
1013	fclose(f);
1014	}
1015	#endif
1016
1017	printf(" ");
1018	/* DONT FORGET TO ADD THE FLAGS IN ife_print_short, too */
1019
1020	if (ptr->flags == 0) {
1021	printf("[NO FLAGS] ");
1022	} else {
1023	static const char ife_print_flags_strs[] ALIGN1 =
1024	"UP\0"
1025	"BROADCAST\0"
1026	"DEBUG\0"
1027	"LOOPBACK\0"
1028	"POINTOPOINT\0"
1029	"NOTRAILERS\0"
1030	"RUNNING\0"
1031	"NOARP\0"
1032	"PROMISC\0"
1033	"ALLMULTI\0"
1034	"SLAVE\0"
1035	"MASTER\0"
1036	"MULTICAST\0"
1037	#ifdef HAVE_DYNAMIC
1038	"DYNAMIC\0"
1039	#endif
1040	;
1041	static const unsigned short ife_print_flags_mask[] ALIGN2 = {
1042	IFF_UP,
1043	IFF_BROADCAST,
1044	IFF_DEBUG,
1045	IFF_LOOPBACK,
1046	IFF_POINTOPOINT,
1047	IFF_NOTRAILERS,
1048	IFF_RUNNING,
1049	IFF_NOARP,
1050	IFF_PROMISC,
1051	IFF_ALLMULTI,
1052	IFF_SLAVE,
1053	IFF_MASTER,
1054	IFF_MULTICAST
1055	#ifdef HAVE_DYNAMIC
1056	,IFF_DYNAMIC
1057	#endif
1058	};
1059	const unsigned short *mask = ife_print_flags_mask;
1060	const char *str = ife_print_flags_strs;
1061	do {
1062	if (ptr->flags & *mask) {
1063	printf("%s ", str);
1064	}
1065	mask++;
1066	str += strlen(str) + 1;
1067	} while (*str);
1068	}
1069
1070	/* DONT FORGET TO ADD THE FLAGS IN ife_print_short */
1071	printf(" MTU:%d Metric:%d", ptr->mtu, ptr->metric ? ptr->metric : 1);
1072	#ifdef SIOCSKEEPALIVE
1073	if (ptr->outfill \|\| ptr->keepalive)
1074	printf(" Outfill:%d Keepalive:%d", ptr->outfill, ptr->keepalive);
1075	#endif
1076	puts("");
1077
1078	/* If needed, display the interface statistics. */
1079
1080	if (ptr->statistics_valid) {
1081	/* XXX: statistics are currently only printed for the primary address,
1082	* not for the aliases, although strictly speaking they're shared
1083	* by all addresses.
1084	*/
1085	printf(" ");
1086
1087	printf("RX packets:%llu errors:%lu dropped:%lu overruns:%lu frame:%lu\n",
1088	ptr->stats.rx_packets, ptr->stats.rx_errors,
1089	ptr->stats.rx_dropped, ptr->stats.rx_fifo_errors,
1090	ptr->stats.rx_frame_errors);
1091	if (can_compress)
1092	printf(" compressed:%lu\n",
1093	ptr->stats.rx_compressed);
1094	printf(" ");
1095	printf("TX packets:%llu errors:%lu dropped:%lu overruns:%lu carrier:%lu\n",
1096	ptr->stats.tx_packets, ptr->stats.tx_errors,
1097	ptr->stats.tx_dropped, ptr->stats.tx_fifo_errors,
1098	ptr->stats.tx_carrier_errors);
1099	printf(" collisions:%lu ", ptr->stats.collisions);
1100	if (can_compress)
1101	printf("compressed:%lu ", ptr->stats.tx_compressed);
1102	if (ptr->tx_queue_len != -1)
1103	printf("txqueuelen:%d ", ptr->tx_queue_len);
1104	printf("\n R");
1105	print_bytes_scaled(ptr->stats.rx_bytes, " T");
1106	print_bytes_scaled(ptr->stats.tx_bytes, "\n");
1107
1108	}
1109
1110	if ((ptr->map.irq \|\| ptr->map.mem_start \|\| ptr->map.dma \|\|
1111	ptr->map.base_addr)) {
1112	printf(" ");
1113	if (ptr->map.irq)
1114	printf("Interrupt:%d ", ptr->map.irq);
1115	if (ptr->map.base_addr >= 0x100) /* Only print devices using it for
1116	I/O maps */
1117	printf("Base address:0x%lx ",
1118	(unsigned long) ptr->map.base_addr);
1119	if (ptr->map.mem_start) {
1120	printf("Memory:%lx-%lx ", ptr->map.mem_start,
1121	ptr->map.mem_end);
1122	}
1123	if (ptr->map.dma)
1124	printf("DMA chan:%x ", ptr->map.dma);
1125	puts("");
1126	}
1127	puts("");
1128	}
1129
1130
1131	static int do_if_print(struct interface ife) /, int opt_a)/
1132	{
1133	int res;
1134
1135	res = do_if_fetch(ife);
1136	if (res >= 0) {
1137	if ((ife->flags & IFF_UP) \|\| interface_opt_a)
1138	ife_print(ife);
1139	}
1140	return res;
1141	}
1142
1143	static struct interface lookup_interface(char name)
1144	{
1145	struct interface *ife = NULL;
1146
1147	if (if_readlist_proc(name) < 0)
1148	return NULL;
1149	ife = add_interface(name);
1150	return ife;
1151	}
1152
1153	#ifdef UNUSED
1154	static int for_all_interfaces(int (doit) (struct interface , void *),
1155	void *cookie)
1156	{
1157	struct interface *ife;
1158
1159	if (!int_list && (if_readlist() < 0))
1160	return -1;
1161	for (ife = int_list; ife; ife = ife->next) {
1162	int err = doit(ife, cookie);
1163
1164	if (err)
1165	return err;
1166	}
1167	return 0;
1168	}
1169	#endif
1170
1171	/* for ipv4 add/del modes */
1172	static int if_print(char *ifname)
1173	{
1174	struct interface *ife;
1175	int res;
1176
1177	if (!ifname) {
1178	/res = for_all_interfaces(do_if_print, &interface_opt_a);/
1179	if (!int_list && (if_readlist() < 0))
1180	return -1;
1181	for (ife = int_list; ife; ife = ife->next) {
1182	int err = do_if_print(ife); /, &interface_opt_a);/
1183	if (err)
1184	return err;
1185	}
1186	return 0;
1187	}
1188	ife = lookup_interface(ifname);
1189	res = do_if_fetch(ife);
1190	if (res >= 0)
1191	ife_print(ife);
1192	return res;
1193	}
1194
1195	int display_interfaces(char *ifname)
1196	{
1197	int status;
1198
1199	status = if_print(ifname);
1200
1201	return (status < 0); /* status < 0 == 1 -- error */
1202	}

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source: MondoRescue/branches/2.2.5/mindi-busybox/networking/interface.c@ 1765

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