aboutsummaryrefslogtreecommitdiffstats
path: root/ifenslave/ifenslave.c
blob: bf1b1d7548aecf8296bb6c93b5123a44a3d2a0fd (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
/* Mode: C;
 * ifenslave.c: Configure network interfaces for parallel routing.
 *
 *	This program controls the Linux implementation of running multiple
 *	network interfaces in parallel.
 *
 * Usage:	ifenslave [-v] master-interface < slave-interface [metric <N>] > ...
 *
 * Author:	Donald Becker <becker@cesdis.gsfc.nasa.gov>
 *		Copyright 1994-1996 Donald Becker
 *
 *		This program is free software; you can redistribute it
 *		and/or modify it under the terms of the GNU General Public
 *		License as published by the Free Software Foundation.
 *
 *	The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O
 *	Center of Excellence in Space Data and Information Sciences
 *	   Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
 *
 *  Changes :
 *    - 2000/10/02 Willy Tarreau <willy at meta-x.org> :
 *       - few fixes. Master's MAC address is now correctly taken from
 *         the first device when not previously set ;
 *       - detach support : call BOND_RELEASE to detach an enslaved interface.
 *       - give a mini-howto from command-line help : # ifenslave -h
 *
 *    - 2001/02/16 Chad N. Tindel <ctindel at ieee dot org> :
 *       - Master is now brought down before setting the MAC address.  In
 *         the 2.4 kernel you can't change the MAC address while the device is
 *         up because you get EBUSY.
 *
 *    - 2001/09/13 Takao Indoh <indou dot takao at jp dot fujitsu dot com>
 *       - Added the ability to change the active interface on a mode 1 bond
 *         at runtime.
 *
 *    - 2001/10/23 Chad N. Tindel <ctindel at ieee dot org> :
 *       - No longer set the MAC address of the master.  The bond device will
 *         take care of this itself
 *       - Try the SIOC*** versions of the bonding ioctls before using the
 *         old versions
 *    - 2002/02/18 Erik Habbinga <erik_habbinga @ hp dot com> :
 *       - ifr2.ifr_flags was not initialized in the hwaddr_notset case,
 *         SIOCGIFFLAGS now called before hwaddr_notset test
 *
 *    - 2002/10/31 Tony Cureington <tony.cureington * hp_com> :
 *       - If the master does not have a hardware address when the first slave
 *         is enslaved, the master is assigned the hardware address of that
 *         slave - there is a comment in bonding.c stating "ifenslave takes
 *         care of this now." This corrects the problem of slaves having
 *         different hardware addresses in active-backup mode when
 *         multiple interfaces are specified on a single ifenslave command
 *         (ifenslave bond0 eth0 eth1).
 *
 *    - 2003/03/18 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and
 *                   Shmulik Hen <shmulik.hen at intel dot com>
 *       - Moved setting the slave's mac address and openning it, from
 *         the application to the driver. This enables support of modes
 *         that need to use the unique mac address of each slave.
 *         The driver also takes care of closing the slave and restoring its
 *         original mac address upon release.
 *         In addition, block possibility of enslaving before the master is up.
 *         This prevents putting the system in an undefined state.
 *
 *    - 2003/05/01 - Amir Noam <amir.noam at intel dot com>
 *       - Added ABI version control to restore compatibility between
 *         new/old ifenslave and new/old bonding.
 *       - Prevent adding an adapter that is already a slave.
 *         Fixes the problem of stalling the transmission and leaving
 *         the slave in a down state.
 *
 *    - 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com>
 *       - Prevent enslaving if the bond device is down.
 *         Fixes the problem of leaving the system in unstable state and
 *         halting when trying to remove the module.
 *       - Close socket on all abnormal exists.
 *       - Add versioning scheme that follows that of the bonding driver.
 *         current version is 1.0.0 as a base line.
 *
 *    - 2003/05/22 - Jay Vosburgh <fubar at us dot ibm dot com>
 *	 - ifenslave -c was broken; it's now fixed
 *	 - Fixed problem with routes vanishing from master during enslave
 *	   processing.
 *
 *    - 2003/05/27 - Amir Noam <amir.noam at intel dot com>
 *	 - Fix backward compatibility issues:
 *	   For drivers not using ABI versions, slave was set down while
 *	   it should be left up before enslaving.
 *	   Also, master was not set down and the default set_mac_address()
 *	   would fail and generate an error message in the system log.
 * 	 - For opt_c: slave should not be set to the master's setting
 *	   while it is running. It was already set during enslave. To
 *	   simplify things, it is now handeled separately.
 */

#define APP_VERSION	"1.0.12"
#define APP_RELDATE	"June 30, 2003"
#define APP_NAME	"ifenslave"

static char *version =
APP_NAME ".c:v" APP_VERSION " (" APP_RELDATE ") "  "\nDonald Becker (becker@cesdis.gsfc.nasa.gov).\n"
"detach support added on 2000/10/02 by Willy Tarreau (willy at meta-x.org).\n"
"2.4 kernel support added on 2001/02/16 by Chad N. Tindel (ctindel at ieee dot org.\n";

static const char *usage_msg =
"Usage: ifenslave [-adfrvVh] <master-interface> < <slave-if> [metric <N>] > ...\n"
"       ifenslave -c master-interface slave-if\n";

static const char *howto_msg =
"Usage: ifenslave [-adfrvVh] <master-interface> < <slave-if> [metric <N>] > ...\n"
"       ifenslave -c master-interface slave-if\n"
"\n"
"       To create a bond device, simply follow these three steps :\n"
"       - ensure that the required drivers are properly loaded :\n"
"         # modprobe bonding ; modprobe <3c59x|eepro100|pcnet32|tulip|...>\n"
"       - assign an IP address to the bond device :\n"
"         # ifconfig bond0 <addr> netmask <mask> broadcast <bcast>\n"
"       - attach all the interfaces you need to the bond device :\n"
"         # ifenslave bond0 eth0 eth1 eth2\n"
"         If bond0 didn't have a MAC address, it will take eth0's. Then, all\n"
"         interfaces attached AFTER this assignment will get the same MAC addr.\n"
"\n"
"       To detach a dead interface without setting the bond device down :\n"
"         # ifenslave -d bond0 eth1\n"
"\n"
"       To set the bond device down and automatically release all the slaves :\n"
"         # ifconfig bond0 down\n"
"\n"
"       To change active slave :\n"
"         # ifenslave -c bond0 eth0\n"
"\n";

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <linux/if.h>
#include <linux/if_arp.h>
#include <linux/if_ether.h>
#include <linux/if_bonding.h>
#include <linux/sockios.h>

typedef unsigned long long u64;	/* hack, so we may include kernel's ethtool.h */
typedef __uint32_t u32;		/* ditto */
typedef __uint16_t u16;		/* ditto */
typedef __uint8_t u8;		/* ditto */
#include <linux/ethtool.h>

struct option longopts[] = {
 /* { name  has_arg  *flag  val } */
    {"all-interfaces", 0, 0, 'a'},	/* Show all interfaces. */
    {"force",       0, 0, 'f'},		/* Force the operation. */
    {"help", 		0, 0, '?'},		/* Give help */
	{"howto",       0, 0, 'h'},     /* Give some more help */
    {"receive-slave", 0, 0, 'r'},	/* Make a receive-only slave.  */
    {"verbose", 	0, 0, 'v'},		/* Report each action taken.  */
    {"version", 	0, 0, 'V'},		/* Emit version information.  */
    {"detach",       0, 0, 'd'},	/* Detach a slave interface. */
    {"change-active", 0, 0, 'c'},	/* Change the active slave.  */
    { 0, 0, 0, 0 }
};

/* Command-line flags. */
unsigned int
opt_a = 0,					/* Show-all-interfaces flag. */
opt_f = 0,					/* Force the operation. */
opt_r = 0,					/* Set up a Rx-only slave. */
opt_d = 0,					/* detach a slave interface. */
opt_c = 0,					/* change-active-slave flag. */
verbose = 0,					/* Verbose flag. */
opt_version = 0,
opt_howto = 0;
int skfd = -1;					/* AF_INET socket for ioctl() calls.	*/

static void if_print(char *ifname);
static int get_abi_ver(char *master_ifname);

int
main(int argc, char **argv)
{
	struct ifreq  ifr2, if_hwaddr, if_ipaddr, if_metric, if_mtu, if_dstaddr;
	struct ifreq  if_netmask, if_brdaddr, if_flags;
	int rv, goterr = 0;
	int c, errflag = 0;
	sa_family_t master_family;
	char **spp, *master_ifname, *slave_ifname;
	int hwaddr_notset;
	int abi_ver = 0;

	while ((c = getopt_long(argc, argv, "acdfrvV?h", longopts, 0)) != EOF)
		switch (c) {
		case 'a': opt_a++; break;
		case 'f': opt_f++; break;
		case 'r': opt_r++; break;
		case 'd': opt_d++; break;
		case 'c': opt_c++; break;
		case 'v': verbose++;		break;
		case 'V': opt_version++;	break;
		case 'h': opt_howto++;	break;
		case '?': errflag++;
		}

	/* option check */
	if (opt_c)
		if(opt_a || opt_f || opt_r || opt_d || verbose || opt_version ||
		   opt_howto || errflag ) {
			fprintf(stderr, usage_msg);
			return 2;
		}

	if (errflag) {
		fprintf(stderr, usage_msg);
		return 2;
	}

	if (opt_howto) {
		fprintf(stderr, howto_msg);
		return 0;
	}

	if (verbose || opt_version) {
		printf(version);
		if (opt_version)
			exit(0);
	}

	/* Open a basic socket. */
	if ((skfd = socket(AF_INET, SOCK_DGRAM,0)) < 0) {
		perror("socket");
		exit(-1);
	}

	if (verbose)
		fprintf(stderr, "DEBUG: argc=%d, optind=%d and argv[optind] is %s.\n",
				argc, optind, argv[optind]);

	/* No remaining args means show all interfaces. */
	if (optind == argc) {
		if_print((char *)NULL);
		(void) close(skfd);
		exit(0);
	}

	/* Copy the interface name. */
	spp = argv + optind;
	master_ifname = *spp++;
	slave_ifname = *spp++;

	/* Check command line. */
	if (opt_c) {
		char **tempp = spp;
		if ((master_ifname == NULL)||(slave_ifname == NULL)||(*tempp++ != NULL)) {
			fprintf(stderr, usage_msg);
			(void) close(skfd);
			return 2;
		}
	}

	/* A single args means show the configuration for this interface. */
	if (slave_ifname == NULL) {
		if_print(master_ifname);
		(void) close(skfd);
		exit(0);
	}

	/* exchange abi version with bonding driver */
	abi_ver = get_abi_ver(master_ifname);
	if (abi_ver < 0) {
		(void) close(skfd);
		exit(1);
	}

	/* Get the vitals from the master interface. */
	{
		struct ifreq *ifra[7] = { &if_ipaddr, &if_mtu, &if_dstaddr,
								  &if_brdaddr, &if_netmask, &if_flags,
								  &if_hwaddr };
		const char *req_name[7] = {
			"IP address", "MTU", "destination address",
			"broadcast address", "netmask", "status flags",
			"hardware address" };
		const int ioctl_req_type[7] = {
			SIOCGIFADDR, SIOCGIFMTU, SIOCGIFDSTADDR,
			SIOCGIFBRDADDR, SIOCGIFNETMASK, SIOCGIFFLAGS,
			SIOCGIFHWADDR };
		int i;

		for (i = 0; i < 7; i++) {
			strncpy(ifra[i]->ifr_name, master_ifname, IFNAMSIZ);
			if (ioctl(skfd, ioctl_req_type[i], ifra[i]) < 0) {
				fprintf(stderr,
						"Something broke getting the master's %s: %s.\n",
						req_name[i], strerror(errno));
			}
		}

		/* check if master is up; if not then fail any operation */
		if (!(if_flags.ifr_flags & IFF_UP)) {
			fprintf(stderr, "Illegal operation; the specified master interface '%s' is not up.\n", master_ifname);
			(void) close(skfd);
			exit (1);
		}

		hwaddr_notset = 1; /* assume master's address not set yet */
		for (i = 0; hwaddr_notset && (i < 6); i++) {
			hwaddr_notset &= ((unsigned char *)if_hwaddr.ifr_hwaddr.sa_data)[i] == 0;
		}

		/* The family '1' is ARPHRD_ETHER for ethernet. */
		if (if_hwaddr.ifr_hwaddr.sa_family != 1 && !opt_f) {
			fprintf(stderr, "The specified master interface '%s' is not"
					" ethernet-like.\n  This program is designed to work"
					" with ethernet-like network interfaces.\n"
					" Use the '-f' option to force the operation.\n",
					master_ifname);
			(void) close(skfd);
			exit (1);
		}
		master_family = if_hwaddr.ifr_hwaddr.sa_family;
		if (verbose) {
			unsigned char *hwaddr = (unsigned char *)if_hwaddr.ifr_hwaddr.sa_data;
			printf("The current hardware address (SIOCGIFHWADDR) of %s is type %d  "
				   "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x.\n", master_ifname,
				   if_hwaddr.ifr_hwaddr.sa_family, hwaddr[0], hwaddr[1],
				   hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5]);
		}
	}


	/* do this when enslaving interfaces */
	do {
		if (opt_d) {  /* detach a slave interface from the master */
			strncpy(if_flags.ifr_name, master_ifname, IFNAMSIZ);
			strncpy(if_flags.ifr_slave, slave_ifname, IFNAMSIZ);
			if ((ioctl(skfd, SIOCBONDRELEASE, &if_flags) < 0) &&
				(ioctl(skfd, BOND_RELEASE_OLD, &if_flags) < 0)) {
					fprintf(stderr,	"SIOCBONDRELEASE: cannot detach %s from %s. errno=%s.\n",
							slave_ifname, master_ifname, strerror(errno));
			}
			else if (abi_ver < 1) {
			      	/* The driver is using an old ABI, so we'll set the interface
				 * down to avoid any conflicts due to same IP/MAC
				 */
				strncpy(ifr2.ifr_name, slave_ifname, IFNAMSIZ);
				if (ioctl(skfd, SIOCGIFFLAGS, &ifr2) < 0) {
					int saved_errno = errno;
					fprintf(stderr, "SIOCGIFFLAGS on %s failed: %s\n", slave_ifname,
						strerror(saved_errno));
				}
				else {
					ifr2.ifr_flags &= ~(IFF_UP | IFF_RUNNING);
					if (ioctl(skfd, SIOCSIFFLAGS, &ifr2) < 0) {
						int saved_errno = errno;
						fprintf(stderr, "Shutting down interface %s failed: %s\n",
							slave_ifname, strerror(saved_errno));
					}
				}
			}
		} else if (opt_c) { /* change primary slave */
			strncpy(if_flags.ifr_name, master_ifname, IFNAMSIZ);
			strncpy(if_flags.ifr_slave, slave_ifname, IFNAMSIZ);
			if ((ioctl(skfd, SIOCBONDCHANGEACTIVE, &if_flags) < 0) &&
			    (ioctl(skfd, BOND_CHANGE_ACTIVE_OLD, &if_flags) < 0)) {
				fprintf(stderr,	"SIOCBONDCHANGEACTIVE: %s.\n", strerror(errno));
			}
		} else {  /* attach a slave interface to the master */

			strncpy(ifr2.ifr_name, slave_ifname, IFNAMSIZ);
			if (ioctl(skfd, SIOCGIFFLAGS, &ifr2) < 0) {
				int saved_errno = errno;
				fprintf(stderr, "SIOCGIFFLAGS on %s failed: %s\n", slave_ifname,
						strerror(saved_errno));
				(void) close(skfd);
				return 1;
			}

			if ((ifr2.ifr_flags & IFF_SLAVE) && !opt_r) {
				fprintf(stderr, "%s is already a slave\n", slave_ifname);
				(void) close(skfd);
				return 1;
			}

			/* if hwaddr_notset, assign the slave hw address to the master */
			if (hwaddr_notset) {
				/* assign the slave hw address to the
				 * master since it currently does not
				 * have one; otherwise, slaves may
				 * have different hw addresses in
				 * active-backup mode as seen when enslaving
				 * using "ifenslave bond0 eth0 eth1" because
				 * hwaddr_notset is set outside this loop.
				 * TODO: put this and the "else" portion in
				 *       a function.
				 */
				/* get the slaves MAC address */
				strncpy(if_hwaddr.ifr_name, slave_ifname,
					IFNAMSIZ);
				rv = ioctl(skfd, SIOCGIFHWADDR, &if_hwaddr);
				if (-1 == rv) {
					fprintf(stderr, "Could not get MAC "
						"address of %s: %s\n",
						slave_ifname,
						strerror(errno));
					strncpy(if_hwaddr.ifr_name,
						master_ifname, IFNAMSIZ);
					goterr = 1;
				}

				if (!goterr) {
					if (abi_ver < 1) {
						/* In ABI versions older than 1, the
						 * master's set_mac routine couldn't
						 * work if it was up, because it
						 * used the default ethernet set_mac
						 * function.
						 */
						/* bring master down */
						if_flags.ifr_flags &= ~IFF_UP;
						if (ioctl(skfd, SIOCSIFFLAGS,
								&if_flags) < 0) {
							goterr = 1;
							fprintf(stderr,
								"Shutting down "
								"interface %s failed: "
								"%s\n",
								master_ifname,
								strerror(errno));
						}
					}

					strncpy(if_hwaddr.ifr_name,
						master_ifname, IFNAMSIZ);
					if (ioctl(skfd, SIOCSIFHWADDR,
							&if_hwaddr) < 0) {
						fprintf(stderr,
							"Could not set MAC "
							"address of %s: %s\n",
							master_ifname,
							strerror(errno));
						goterr=1;
					} else {
						hwaddr_notset = 0;
					}

					if (abi_ver < 1) {
						/* bring master back up */
						if_flags.ifr_flags |= IFF_UP;
						if (ioctl(skfd, SIOCSIFFLAGS,
							  &if_flags) < 0) {
							fprintf(stderr,
								"Bringing up interface "
								"%s failed: %s\n",
								master_ifname,
								strerror(errno));
						}
					}
				}
			} else if (abi_ver < 1) { /* if (hwaddr_notset) */

			      	/* The driver is using an old ABI, so we'll set the interface
				 * down and assign the master's hwaddr to it
				 */
				if (ifr2.ifr_flags & IFF_UP) {
					ifr2.ifr_flags &= ~IFF_UP;
					if (ioctl(skfd, SIOCSIFFLAGS, &ifr2) < 0) {
						int saved_errno = errno;
						fprintf(stderr, "Shutting down interface %s failed: %s\n",
							slave_ifname, strerror(saved_errno));
					}
				}

				strncpy(if_hwaddr.ifr_name, slave_ifname, IFNAMSIZ);
				if (ioctl(skfd, SIOCSIFHWADDR, &if_hwaddr) < 0) {
					int saved_errno = errno;
					fprintf(stderr, "SIOCSIFHWADDR on %s failed: %s\n", if_hwaddr.ifr_name,
						strerror(saved_errno));
					if (saved_errno == EBUSY)
						fprintf(stderr, "  The slave device %s is busy: it must be"
							" idle before running this command.\n", slave_ifname);
					else if (saved_errno == EOPNOTSUPP)
						fprintf(stderr, "  The slave device you specified does not support"
							" setting the MAC address.\n  Your kernel likely does not"
							" support slave devices.\n");
					else if (saved_errno == EINVAL)
						fprintf(stderr, "  The slave device's address type does not match"
							" the master's address type.\n");
				} else {
					if (verbose) {
						unsigned char *hwaddr = if_hwaddr.ifr_hwaddr.sa_data;
						printf("Slave's (%s) hardware address set to "
							   "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x.\n", slave_ifname,
							   hwaddr[0], hwaddr[1], hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5]);
					}
				}
			}

			if (*spp  &&  !strcmp(*spp, "metric")) {
				if (*++spp == NULL) {
					fprintf(stderr, usage_msg);
					(void) close(skfd);
					exit(2);
				}
				if_metric.ifr_metric = atoi(*spp);
				strncpy(if_metric.ifr_name, slave_ifname, IFNAMSIZ);
				if (ioctl(skfd, SIOCSIFMETRIC, &if_metric) < 0) {
					fprintf(stderr, "SIOCSIFMETRIC on %s: %s\n", slave_ifname,
							strerror(errno));
					goterr = 1;
				}
				spp++;
			}

			if (strncpy(if_ipaddr.ifr_name, slave_ifname, IFNAMSIZ) <= 0
				|| ioctl(skfd, SIOCSIFADDR, &if_ipaddr) < 0) {
				fprintf(stderr,
						"Something broke setting the slave's address: %s.\n",
						strerror(errno));
			} else {
				if (verbose) {
					unsigned char *ipaddr = if_ipaddr.ifr_addr.sa_data;
					printf("Set the slave's (%s) IP address to %d.%d.%d.%d.\n",
						   slave_ifname, ipaddr[0], ipaddr[1], ipaddr[2], ipaddr[3]);
				}
			}

			if (strncpy(if_mtu.ifr_name, slave_ifname, IFNAMSIZ) <= 0
				|| ioctl(skfd, SIOCSIFMTU, &if_mtu) < 0) {
				fprintf(stderr, "Something broke setting the slave MTU: %s.\n",
						strerror(errno));
			} else {
				if (verbose)
					printf("Set the slave's (%s) MTU to %d.\n", slave_ifname, if_mtu.ifr_mtu);
			}

			if (strncpy(if_dstaddr.ifr_name, slave_ifname, IFNAMSIZ) <= 0
				|| ioctl(skfd, SIOCSIFDSTADDR, &if_dstaddr) < 0) {
				fprintf(stderr, "Error setting the slave (%s) with SIOCSIFDSTADDR: %s.\n",
						slave_ifname, strerror(errno));
			} else {
				if (verbose) {
					unsigned char *ipaddr = if_dstaddr.ifr_dstaddr.sa_data;
					printf("Set the slave's (%s) destination address to %d.%d.%d.%d.\n",
						   slave_ifname, ipaddr[0], ipaddr[1], ipaddr[2], ipaddr[3]);
				}
			}

			if (strncpy(if_brdaddr.ifr_name, slave_ifname, IFNAMSIZ) <= 0
				|| ioctl(skfd, SIOCSIFBRDADDR, &if_brdaddr) < 0) {
				fprintf(stderr,
						"Something broke setting the slave (%s) broadcast address: %s.\n",
						slave_ifname, strerror(errno));
			} else {
				if (verbose) {
					unsigned char *ipaddr = if_brdaddr.ifr_broadaddr.sa_data;
					printf("Set the slave's (%s) broadcast address to %d.%d.%d.%d.\n",
						   slave_ifname, ipaddr[0], ipaddr[1], ipaddr[2], ipaddr[3]);
				}
			}

			if (strncpy(if_netmask.ifr_name, slave_ifname, IFNAMSIZ) <= 0
				|| ioctl(skfd, SIOCSIFNETMASK, &if_netmask) < 0) {
				fprintf(stderr,
						"Something broke setting the slave (%s) netmask: %s.\n",
						slave_ifname, strerror(errno));
			} else {
				if (verbose) {
					unsigned char *ipaddr = if_netmask.ifr_netmask.sa_data;
					printf("Set the slave's (%s) netmask to %d.%d.%d.%d.\n",
						   slave_ifname, ipaddr[0], ipaddr[1], ipaddr[2], ipaddr[3]);
				}
			}

			if (abi_ver < 1) {

			      	/* The driver is using an old ABI, so we'll set the interface
				 * up before enslaving it
				 */
				ifr2.ifr_flags |= IFF_UP;
				if ((ifr2.ifr_flags &= ~(IFF_SLAVE | IFF_MASTER)) == 0
					|| strncpy(ifr2.ifr_name, slave_ifname, IFNAMSIZ) <= 0
					|| ioctl(skfd, SIOCSIFFLAGS, &ifr2) < 0) {
						fprintf(stderr,
							"Something broke setting the slave (%s) flags: %s.\n",
							slave_ifname, strerror(errno));
				} else {
					if (verbose)
						printf("Set the slave's (%s) flags %4.4x.\n",
							slave_ifname, if_flags.ifr_flags);
				}
			} else {
				/* the bonding module takes care of setting the slave's mac address
			 	 * and opening its interface
			 	 */
				if (ifr2.ifr_flags & IFF_UP) { /* the interface will need to be down */
					ifr2.ifr_flags &= ~IFF_UP;
					if (ioctl(skfd, SIOCSIFFLAGS, &ifr2) < 0) {
						int saved_errno = errno;
						fprintf(stderr, "Shutting down interface %s failed: %s\n",
							slave_ifname, strerror(saved_errno));
					}
				}
			}

			/* Do the real thing */
			if (!opt_r) {
				strncpy(if_flags.ifr_name, master_ifname, IFNAMSIZ);
				strncpy(if_flags.ifr_slave, slave_ifname, IFNAMSIZ);
				if ((ioctl(skfd, SIOCBONDENSLAVE, &if_flags) < 0) &&
				    (ioctl(skfd, BOND_ENSLAVE_OLD, &if_flags) < 0)) {
					fprintf(stderr,	"SIOCBONDENSLAVE: %s.\n", strerror(errno));
				}
			}
		}
	} while ( (slave_ifname = *spp++) != NULL);

	/* Close the socket. */
	(void) close(skfd);

	return(goterr);
}

static short mif_flags;

/* Get the inteface configuration from the kernel. */
static int if_getconfig(char *ifname)
{
	struct ifreq ifr;
	int metric, mtu;			/* Parameters of the master interface. */
	struct sockaddr dstaddr, broadaddr, netmask;

	strcpy(ifr.ifr_name, ifname);
	if (ioctl(skfd, SIOCGIFFLAGS, &ifr) < 0)
		return -1;
	mif_flags = ifr.ifr_flags;
	printf("The result of SIOCGIFFLAGS on %s is %x.\n",
		   ifname, ifr.ifr_flags);

	strcpy(ifr.ifr_name, ifname);
	if (ioctl(skfd, SIOCGIFADDR, &ifr) < 0)
		return -1;
	printf("The result of SIOCGIFADDR is %2.2x.%2.2x.%2.2x.%2.2x.\n",
		   ifr.ifr_addr.sa_data[0], ifr.ifr_addr.sa_data[1],
		   ifr.ifr_addr.sa_data[2], ifr.ifr_addr.sa_data[3]);

	strcpy(ifr.ifr_name, ifname);
	if (ioctl(skfd, SIOCGIFHWADDR, &ifr) < 0)
		return -1;

	{
		/* Gotta convert from 'char' to unsigned for printf().  */
		unsigned char *hwaddr = (unsigned char *)ifr.ifr_hwaddr.sa_data;
		printf("The result of SIOCGIFHWADDR is type %d  "
			   "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x.\n",
			   ifr.ifr_hwaddr.sa_family, hwaddr[0], hwaddr[1],
			   hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5]);
	}

	strcpy(ifr.ifr_name, ifname);
	if (ioctl(skfd, SIOCGIFMETRIC, &ifr) < 0) {
		metric = 0;
	} else
		metric = ifr.ifr_metric;

	strcpy(ifr.ifr_name, ifname);
	if (ioctl(skfd, SIOCGIFMTU, &ifr) < 0)
		mtu = 0;
	else
		mtu = ifr.ifr_mtu;

	strcpy(ifr.ifr_name, ifname);
	if (ioctl(skfd, SIOCGIFDSTADDR, &ifr) < 0) {
		memset(&dstaddr, 0, sizeof(struct sockaddr));
	} else
		dstaddr = ifr.ifr_dstaddr;

	strcpy(ifr.ifr_name, ifname);
	if (ioctl(skfd, SIOCGIFBRDADDR, &ifr) < 0) {
		memset(&broadaddr, 0, sizeof(struct sockaddr));
	} else
		broadaddr = ifr.ifr_broadaddr;

	strcpy(ifr.ifr_name, ifname);
	if (ioctl(skfd, SIOCGIFNETMASK, &ifr) < 0) {
		memset(&netmask, 0, sizeof(struct sockaddr));
	} else
		netmask = ifr.ifr_netmask;

	return(0);
}

static void if_print(char *ifname)
{
	char buff[1024];
	struct ifconf ifc;
	struct ifreq *ifr;
	int i;

	if (ifname == (char *)NULL) {
		ifc.ifc_len = sizeof(buff);
		ifc.ifc_buf = buff;
		if (ioctl(skfd, SIOCGIFCONF, &ifc) < 0) {
			fprintf(stderr, "SIOCGIFCONF: %s\n", strerror(errno));
			return;
		}

		ifr = ifc.ifc_req;
		for (i = ifc.ifc_len / sizeof(struct ifreq); --i >= 0; ifr++) {
			if (if_getconfig(ifr->ifr_name) < 0) {
				fprintf(stderr, "%s: unknown interface.\n",
						ifr->ifr_name);
				continue;
			}

			if (((mif_flags & IFF_UP) == 0) && !opt_a) continue;
			/*ife_print(&ife);*/
		}
	} else {
		if (if_getconfig(ifname) < 0)
			fprintf(stderr, "%s: unknown interface.\n", ifname);
	}
}

static int get_abi_ver(char *master_ifname)
{
	struct ifreq ifr;
	struct ethtool_drvinfo info;
	int abi_ver = 0;

	memset(&ifr, 0, sizeof(ifr));
	strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
	ifr.ifr_data = (caddr_t)&info;

	info.cmd = ETHTOOL_GDRVINFO;
	strncpy(info.driver, "ifenslave", 32);
	snprintf(info.fw_version, 32, "%d", BOND_ABI_VERSION);
	if (ioctl(skfd, SIOCETHTOOL, &ifr) >= 0) {
		char *endptr;

		abi_ver = strtoul(info.fw_version, &endptr, 0);
		if (*endptr) {
			fprintf(stderr, "Error: got invalid string as an ABI "
				"version from the bonding module\n");
			return -1;
		}
	}

	if (verbose) {
        	printf("ABI ver is %d\n", abi_ver);
	}
	return abi_ver;
}



/*
 * Local variables:
 *  version-control: t
 *  kept-new-versions: 5
 *  c-indent-level: 4
 *  c-basic-offset: 4
 *  tab-width: 4
 *  compile-command: "gcc -Wall -Wstrict-prototypes -O -I/usr/src/linux/include ifenslave.c -o ifenslave"
 * End:
 */