liblocsetup.pm 41.3 KB
Newer Older
1
#!/usr/bin/perl -wT
Leigh B. Stoller's avatar
Leigh B. Stoller committed
2 3
#
# EMULAB-COPYRIGHT
Mike Hibler's avatar
Mike Hibler committed
4
# Copyright (c) 2000-2008 University of Utah and the Flux Group.
Leigh B. Stoller's avatar
Leigh B. Stoller committed
5 6 7
# All rights reserved.
#

8 9 10 11 12 13 14
#
# Linux specific routines and constants for the client bootime setup stuff.
#
package liblocsetup;
use Exporter;
@ISA = "Exporter";
@EXPORT =
15 16
    qw ( $CP $EGREP $NFSMOUNT $UMOUNT $TMPASSWD $SFSSD $SFSCD $RPMCMD
	 $HOSTSFILE $LOOPBACKMOUNT
17
	 os_account_cleanup os_ifconfig_line os_etchosts_line
18
	 os_setup os_groupadd os_useradd os_userdel os_usermod os_mkdir
19
	 os_ifconfig_veth os_viface_name os_modpasswd
20 21
	 os_routing_enable_forward os_routing_enable_gated
	 os_routing_add_manual os_routing_del_manual os_homedirdel
Mike Hibler's avatar
Mike Hibler committed
22
	 os_groupdel os_getnfsmounts os_islocaldir
23
	 os_fwconfig_line os_fwrouteconfig_line os_config_gre
24
	 os_get_disks os_get_disk_size os_get_partition_info
25 26 27 28 29
       );

# Must come after package declaration!
use English;

30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
# Load up the paths. Its conditionalized to be compatabile with older images.
# Note this file has probably already been loaded by the caller.
BEGIN
{
    if (-e "/etc/emulab/paths.pm") {
	require "/etc/emulab/paths.pm";
	import emulabpaths;
    }
    else {
	my $ETCDIR  = "/etc/rc.d/testbed";
	my $BINDIR  = "/etc/rc.d/testbed";
	my $VARDIR  = "/etc/rc.d/testbed";
	my $BOOTDIR = "/etc/rc.d/testbed";
    }
}
45

46 47
# Convenience.
sub REMOTE()	{ return libsetup::REMOTE(); }
48
sub REMOTEDED()	{ return libsetup::REMOTEDED(); }
49
sub PLAB()	{ return libsetup::PLAB(); }
50
sub LINUXJAILED(){ return libsetup::LINUXJAILED(); }
51

52 53 54 55
#
# Various programs and things specific to Linux and that we want to export.
# 
$CP		= "/bin/cp";
Mike Hibler's avatar
Mike Hibler committed
56
$DF		= "/bin/df";
57
$EGREP		= "/bin/egrep -q";
Kevin Atkinson's avatar
Kevin Atkinson committed
58
$NFSMOUNT	= "/bin/mount -o vers=2,udp"; # Force NFS Version 2 over UDP
59
$LOOPBACKMOUNT	= "/bin/mount --bind ";
60
$UMOUNT		= "/bin/umount";
61
$TMPASSWD	= "$ETCDIR/passwd";
62 63
$SFSSD		= "/usr/local/sbin/sfssd";
$SFSCD		= "/usr/local/sbin/sfscd";
Mike Hibler's avatar
Mike Hibler committed
64
$RPMCMD		= "/bin/rpm";
65
$HOSTSFILE	= "/etc/hosts";
66
$WGET		= "/usr/bin/wget";
67 68 69 70

#
# These are not exported
#
71 72 73
my $TMGROUP	= "$ETCDIR/group";
my $TMSHADOW    = "$ETCDIR/shadow";
my $TMGSHADOW   = "$ETCDIR/gshadow";
74 75 76 77
my $USERADD     = "/usr/sbin/useradd";
my $USERDEL     = "/usr/sbin/userdel";
my $USERMOD     = "/usr/sbin/usermod";
my $GROUPADD	= "/usr/sbin/groupadd";
78
my $GROUPDEL	= "/usr/sbin/groupdel";
79 80
my $IFCONFIGBIN = "/sbin/ifconfig";
my $IFCONFIG    = "$IFCONFIGBIN %s inet %s netmask %s";
81
my $VLANCONFIG  = "/sbin/vconfig";
82
my $IFC_1000MBS  = "1000baseTx";
83 84 85 86
my $IFC_100MBS  = "100baseTx";
my $IFC_10MBS   = "10baseT";
my $IFC_FDUPLEX = "FD";
my $IFC_HDUPLEX = "HD";
87
my @LOCKFILES   = ("/etc/group.lock", "/etc/gshadow.lock");
88
my $MKDIR	= "/bin/mkdir";
89 90
my $GATED	= "/usr/sbin/gated";
my $ROUTE	= "/sbin/route";
91 92
my $SHELLS	= "/etc/shells";
my $DEFSHELL	= "/bin/tcsh";
93 94 95 96 97 98
my $IWCONFIG    = '/usr/local/sbin/iwconfig';
my $WLANCONFIG  = '/usr/local/bin/wlanconfig';
my $RMMOD       = '/sbin/rmmod';
my $MODPROBE    = '/sbin/modprobe';
my $IWPRIV      = '/usr/local/sbin/iwpriv';
my $BRCTL       = "/usr/sbin/brctl";
99 100 101 102

#
# OS dependent part of cleanup node state.
# 
103 104
sub os_account_cleanup()
{
105 106 107 108 109
    unlink @LOCKFILES;

    printf STDOUT "Resetting passwd and group files\n";
    if (system("$CP -f $TMGROUP $TMPASSWD /etc") != 0) {
	print STDERR "Could not copy default group file into place: $!\n";
110
	return -1;
111 112 113 114
    }
    
    if (system("$CP -f $TMSHADOW $TMGSHADOW /etc") != 0) {
	print STDERR "Could not copy default passwd file into place: $!\n";
115
	return -1;
116 117 118 119 120 121 122 123
    }
    return 0;
}

#
# Generate and return an ifconfig line that is approriate for putting
# into a shell script (invoked at bootup).
#
124
sub os_ifconfig_line($$$$$$$$;$$$)
125
{
126
    my ($iface, $inet, $mask, $speed, $duplex, $aliases, $iface_type, $lan,
127
	$settings, $rtabid, $cookie) = @_;
128 129 130 131 132 133 134
    my ($miirest, $miisleep, $miisetspd, $media);
    my ($uplines, $downlines);

    #
    # Special handling for new style interfaces (which have settings).
    # This should all move into per-type modules at some point. 
    #
135
    if ($iface_type eq "ath" && defined($settings)) {
136

137 138 139 140 141
        # Get a handle on the "VAP" interface we will create when
        # setting up this interface.
        my ($ifnum) = $iface =~ /wifi(\d+)/;
        my $athiface = "ath" . $ifnum;

142 143 144 145 146
	#
	# Setting the protocol is special and appears to be card specific.
	# How stupid is that!
	#
	my $protocol = $settings->{"protocol"};
147
        my $privcmd = "/usr/local/sbin/iwpriv $athiface mode ";
148 149 150 151 152 153 154 155 156 157 158 159 160 161 162

        SWITCH1: for ($protocol) {
          /^80211a$/ && do {
              $privcmd .= "1";
              last SWITCH1;
          };
          /^80211b$/ && do {
              $privcmd .= "2";
              last SWITCH1;
          };
          /^80211g$/ && do {
              $privcmd .= "3";
              last SWITCH1;
          };
        }
163 164 165 166 167
	 
	#
	# At the moment, we expect just the various flavors of 80211, and
	# we treat them all the same, configuring with iwconfig and iwpriv.
	#
168 169 170
	my $iwcmd = "/usr/local/sbin/iwconfig $athiface ";
        my $wlccmd = "/usr/local/bin/wlanconfig $athiface create ".
            "wlandev $iface ";
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

	#
	# We demand to be given an ssid.
	#
	if (!exists($settings->{"ssid"})) {
	    warn("*** WARNING: No SSID provided for $iface!\n");
	    return undef;
	}
	$iwcmd .= "essid ". $settings->{"ssid"};

	# If we do not get a channel, pick one.
	if (exists($settings->{"channel"})) {
	    $iwcmd .= " channel " . $settings->{"channel"};
	}
	else {
	    $iwcmd .= " channel 3";
	}

	# txpower and rate default to auto if not specified.
	if (exists($settings->{"rate"})) {
	    $iwcmd .= " rate " . $settings->{"rate"};
	}
	else {
	    $iwcmd .= " rate auto";
	}
	if (exists($settings->{"txpower"})) {
	    $iwcmd .= " txpower " . $settings->{"txpower"};
	}
	else {
	    $iwcmd .= " txpower auto";
	}
	# Allow this too. 
203 204 205 206 207 208 209 210 211 212
	if (exists($settings->{"sens"})) {
	    $iwcmd .= " sens " . $settings->{"sens"};
	}

	# allow rts threshold and frag size
	if (exists($settings->{'rts'})) {
	    $iwcmd .= ' rts ' . $settings->{'rts'};
	}
	if (exists($settings->{'frag'})) {
	    $iwcmd .= ' frag ' . $settings->{'frag'};
213 214 215 216
	}

	#
	# We demand to be told if we are the master or a peon.
217 218 219 220 221 222 223
	# We might also be in another mode.  Thus, if accesspoint is specified,
	# we assume we are in either ap/sta (Master/Managed) mode.  If not,
	# we look for a 'mode' argument and assume adhoc if we don't get one.
	# The reason to assume adhoc is because we need accesspoint set to
	# know how to configure the device for ap/sta modes, and setting a
	# device to monitor mode by default sucks.
	# 
224 225
	# This needs to be last for some reason.
	#
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
	if (exists($settings->{'accesspoint'})) {
	    my $accesspoint = $settings->{"accesspoint"};
	    my $accesspointwdots;
	    
	    # Allow either dotted or undotted notation!
	    if ($accesspoint =~ /^(\w{2})(\w{2})(\w{2})(\w{2})(\w{2})(\w{2})$/) {
		$accesspointwdots = "$1:$2:$3:$4:$5:$6";
	    }
	    elsif ($accesspoint =~
		   /^(\w{2}):(\w{2}):(\w{2}):(\w{2}):(\w{2}):(\w{2})$/) {
		$accesspointwdots = $accesspoint;
		$accesspoint      = "${1}${2}${3}${4}${5}${6}";
	    }
	    else {
		warn("*** WARNING: Improper format for MAC ($accesspoint) ".
		     "provided for $iface!\n");
		return undef;
	    }
	    
	    if (libsetup::findiface($accesspoint) eq $iface) {
		$wlccmd .= " wlanmode ap";
		$iwcmd .= " mode Master";
	    }
	    else {
		$wlccmd .= " wlanmode sta";
		$iwcmd .= " mode Managed ap $accesspointwdots";
	    }
253
	}
254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277
	elsif (exists($settings->{'mode'})) {
	    if ($settings->{'mode'} =~ /ad[\s\-]*hoc/i) {
		$wlccmd .= " wlanmode adhoc";
		$iwcmd .= " mode Ad-Hoc";
	    }
	    elsif ($settings->{'mode'} =~ /monitor/i) {
		$wlccmd .= " wlanmode monitor";
		$iwcmd .= " mode Monitor";
	    }
	    elsif ($settings->{'mode'} =~ /ap/i 
		   || $settings->{'mode'} =~ /access[\s\-]*point/i 
		   || $settings->{'mode'} =~ /master/i) {
		$wlccmd .= " wlanmode ap";
		$iwcmd .= " mode Master";
	    }
	    elsif ($settings->{'mode'} =~ /sta/i 
		   || $settings->{'mode'} =~ /managed/i) {
		$wlccmd .= " wlanmode sta";
		$iwcmd .= " mode Managed ap any";
	    }
	    else {
		warn("*** WARNING: Invalid mode provided for $iface!\n");
		return undef;
	    }
278 279
	}
	else {
280
	    warn("*** WARNING: No mode implied for $iface!\n");
281 282
	    return undef;
	}
283

284
        $uplines   = $wlccmd . "\n";
285
	$uplines  .= $privcmd . "\n";
286
	$uplines  .= $iwcmd . "\n";
Kirk Webb's avatar
Kirk Webb committed
287 288
	$uplines  .= sprintf($IFCONFIG, $athiface, $inet, $mask) . "\n";
	$downlines  = "$IFCONFIGBIN $athiface down\n";
289
	$downlines .= "$WLANCONFIG $athiface destroy\n";
Kirk Webb's avatar
Kirk Webb committed
290
	$downlines .= "$IFCONFIGBIN $iface down\n";
291 292
	return ($uplines, $downlines);
    }
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
    #
    # GNU Radio network interface on the flex900 daugherboard
    #
    if ($iface_type eq "flex900" && defined($settings)) {

        my $tuncmd = 
            "/bin/env PYTHONPATH=/usr/local/lib/python2.4/site-packages ".
            "$BINDIR/tunnel.py";

        if (!exists($settings->{"mac"})) {
            warn("*** WARNING: No mac address provided for gnuradio ".
                 "interface!\n");
            return undef;
        }

        my $mac = $settings->{"mac"};

        if (!exists($settings->{"protocol"}) || 
            $settings->{"protocol"} ne "flex900") {
            warn("*** WARNING: Unknown gnuradio protocol specified!\n");
            return undef;
        }

        if (!exists($settings->{"frequency"})) {
            warn("*** WARNING: No frequency specified for gnuradio ".
                 "interface!\n");
            return undef;
        }

        my $frequency = $settings->{"frequency"};
        $tuncmd .= " -f $frequency";

        if (!exists($settings->{"rate"})) {
            warn("*** WARNING: No rate specified for gnuradio interface!\n");
            return undef;
        }

        my $rate = $settings->{"rate"};
        $tuncmd .= " -r $rate";

334 335 336 337 338 339 340
	if (exists($settings->{'carrierthresh'})) {
	    $tuncmd .= " -c " . $settings->{'carrierthresh'};
	}
	if (exists($settings->{'rxgain'})) {
	    $tuncmd .= " --rx-gain=" . $settings->{'rxgain'};
	}

341 342 343 344 345 346 347 348
        $uplines = $tuncmd . " > /dev/null 2>&1 &\n";
        $uplines .= "sleep 5\n";
        $uplines .= "$IFCONFIGBIN $iface hw ether $mac\n";
        $uplines .= sprintf($IFCONFIG, $iface, $inet, $mask) . "\n";
        $downlines = "$IFCONFIGBIN $iface down";
        return ($uplines, $downlines);
    }

349 350 351 352 353 354 355 356 357 358 359
    #
    # Need to check units on the speed. Just in case.
    #
    if ($speed =~ /(\d*)([A-Za-z]*)/) {
	if ($2 eq "Mbps") {
	    $speed = $1;
	}
	elsif ($2 eq "Kbps") {
	    $speed = $1 / 1000;
	}
	else {
360
	    warn("*** Bad speed units $2 in ifconfig, default to 100Mbps\n");
361 362
	    $speed = 100;
	}
363 364 365 366
	if ($speed == 1000) {
	    $media = $IFC_1000MBS;
	}
	elsif ($speed == 100) {
367 368 369 370 371 372
	    $media = $IFC_100MBS;
	}
	elsif ($speed == 10) {
	    $media = $IFC_10MBS;
	}
	else {
373 374
	    warn("*** Bad Speed $speed in ifconfig, default to 100Mbps\n");
	    $speed = 100;
375 376 377 378 379 380 381 382 383 384
	    $media = $IFC_100MBS;
	}
    }
    if ($duplex eq "full") {
	$media = "$media-$IFC_FDUPLEX";
    }
    elsif ($duplex eq "half") {
	$media = "$media-$IFC_HDUPLEX";
    }
    else {
385 386
	warn("*** Bad duplex $duplex in ifconfig, default to full\n");
	$duplex = "full";
387 388 389
	$media = "$media-$IFC_FDUPLEX";
    }

390 391 392 393 394 395
    #
    # Linux is apparently changing from mii-tool to ethtool but some drivers
    # don't support the new interface (3c59x), some don't support the old
    # interface (e1000), and some (eepro100) support the new interface just
    # enough that they can report success but not actually do anything. Sweet!
    #
396 397 398 399 400 401 402
    my $ethtool;
    if (-e "/sbin/ethtool") {
	$ethtool = "/sbin/ethtool";
    } elsif (-e "/usr/sbin/ethtool") {
	$ethtool = "/usr/sbin/ethtool";
    }
    if (defined($ethtool)) {
403
	# this seems to work for returning an error on eepro100
404 405 406
	$uplines = 
	    "if $ethtool $iface >/dev/null 2>&1; then\n    " .
	    "  $ethtool -s $iface autoneg off speed $speed duplex $duplex\n    " .
407
	    "  sleep 2 # needed due to likely bug in e100 driver on pc850s\n".
408 409 410
	    "else\n    " .
	    "  /sbin/mii-tool --force=$media $iface\n    " .
	    "fi\n    ";
411
    } else {
412
	$uplines = "/sbin/mii-tool --force=$media $iface\n    ";
413 414
    }

415 416 417 418
    if ($inet eq "") {
	$uplines .= "$IFCONFIGBIN $iface up";
    }
    else {
419 420 421
	$uplines  .= sprintf($IFCONFIG, $iface, $inet, $mask);
	$downlines = "$IFCONFIGBIN $iface down";
    }
422
    
423
    return ($uplines, $downlines);
424 425
}

426
#
427
# Specialized function for configing virtual ethernet devices:
428
#
429
#	'veth'	one end of an etun device embedded in a vserver
430 431 432 433
#	'vlan'	802.1q tagged vlan devices
#	'alias'	IP aliases on physical interfaces
#
sub os_ifconfig_veth($$$$$;$$$$%)
434
{
435 436 437 438
    my ($iface, $inet, $mask, $id, $vmac,
	$rtabid, $encap, $vtag, $itype, $cookie) = @_;
    my ($uplines, $downlines);

439 440
    if ($itype !~ /^(alias|vlan|veth)$/) {
	warn("Unknown virtual interface type $itype\n");
441 442 443
	return "";
    }

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
    #
    # Veth.
    #
    # Veths for Linux vservers mean vtun devices.  One end is outside
    # the vserver and is bridged with other veths and peths as appropriate
    # to form the topology.  The other end goes in the vserver and is
    # configured with an IP address.  This final step is not done here
    # as the vserver must be running first.
    #
    # In the current configuration, there is configuration that takes
    # place both inside and outside the vserver.
    #
    # Inside:
    # The inside case (LINUXJAILED() == 1) just configures the IP info on
    # the interface.
    #
    # Outside:
    # The outside actions are much more involved as described above.
    # The VTAG identifies a bridge device "ebrN" to be used.
    # The RTABID identifies the namespace, but we don't care here.
    #
    # To create a etun pair you do:
    #    echo etun0,etun1 > /sys/module/etun/parameters/newif
    # To destroy do:
    #    echo etun0 > /sys/module/etun/parameters/delif
    #
    if ($itype eq "veth") {
	#
	# We are inside a Linux jail.
	# We configure the interface pretty much like normal.
	#
	if (LINUXJAILED()) {
	    if ($inet eq "") {
		$uplines .= "$IFCONFIGBIN $iface up";
	    }
	    else {
		$uplines  .= sprintf($IFCONFIG, $iface, $inet, $mask);
		$downlines = "$IFCONFIGBIN $iface down";
	    }
	    
	    return ($uplines, $downlines);
	}

	#
	# Outside jail.
	# Create tunnels and bridge and plumb them all together.
	#
	my $brdev = "ebr$vtag";
	my $iniface = "veth$id";
	my $outiface = "peth$id";
	my $devdir = "/sys/module/etun/parameters";

	# UP
	$uplines = "";

	# modprobe (should be done already for cnet setup, but who cares)
	$uplines .= "modprobe etun\n";

	# make sure bridge device exists and is up
	$uplines .= "    $IFCONFIGBIN $brdev >/dev/null 2>&1 || {";
	$uplines .= "        $BRCTL addbr $brdev\n";
	$uplines .= "        $IFCONFIGBIN $brdev up\n";
	$uplines .= "    }\n";

	# create the tunnel device
	$uplines .= "    echo $outiface,$iniface > $devdir/newif || exit 1\n";

	# bring up outside IF, insert into bridge device
	$uplines .= "    $IFCONFIGBIN $outiface up || exit 2\n";
	$uplines .= "    $BRCTL addif $brdev $outiface || exit 3\n";

	# configure the MAC address for the inside device
	$uplines .= "    $IFCONFIGBIN $iniface hw ether $vmac || exit 4\n";

	# DOWN
	$downlines = "";

	# remove IF from bridge device, down it (remove bridge if empty?)
	$downlines .= "$BRCTL delif $brdev $outiface || exit 13\n";
	$downlines .= "    $IFCONFIGBIN $outiface down || exit 12\n";

	# destroy tunnel devices (this will fail if inside IF in vserver still)
	$downlines .= "    echo $iniface > $devdir/delif || exit 11\n";

	return ($uplines, $downlines);
    }

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
    #
    # IP aliases
    #
    if ($itype eq "alias") {
	my $aif = "$iface:$id";

	$uplines   = sprintf($IFCONFIG, $aif, $inet, $mask);
	$downlines = "$IFCONFIGBIN $aif down";

	return ($uplines, $downlines);
    }

    #
    # VLANs
    #   insmod 8021q (once only)
    #   vconfig set_name_type VLAN_PLUS_VID_NO_PAD (once only)
    #
    #	ifconfig eth0 up (should be done before we are ever called)
    #	vconfig add eth0 601 
    #   ifconfig vlan601 inet ...
    #
    #   ifconfig vlan601 down
    #	vconfig rem vlan601
    #
    if ($itype eq "vlan") {
	if (!defined($vtag)) {
	    warn("No vtag in veth config\n");
	    return "";
	}

	# one time stuff
	if (!exists($cookie->{"vlan"})) {
	    $uplines  = "/sbin/insmod 8021q >/dev/null 2>&1\n    ";
	    $uplines .= "$VLANCONFIG set_name_type VLAN_PLUS_VID_NO_PAD\n    ";
	    $cookie->{"vlan"} = 1;
	}

	my $vdev = "vlan$vtag";

	$uplines   .= "$VLANCONFIG add $iface $vtag\n    ";
	$uplines   .= sprintf($IFCONFIG, $vdev, $inet, $mask);
	$downlines .= "$IFCONFIGBIN $vdev down\n    ";
	$downlines .= "$VLANCONFIG rem $vdev";
    }

    return ($uplines, $downlines);
577 578
}

579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600
#
# Compute the name of a virtual interface device based on the
# information in ifconfig hash (as returned by getifconfig).
#
sub os_viface_name($)
{
    my ($ifconfig) = @_;
    my $piface = $ifconfig->{"IFACE"};

    #
    # Physical interfaces use their own name
    #
    if (!$ifconfig->{"ISVIRT"}) {
	return $piface;
    }

    #
    # Otherwise we have a virtual interface: alias, veth, vlan.
    #
    # alias: There is an alias device, but not sure what it is good for
    #        so for now we just return the phys device.
    # vlan:  vlan<VTAG>
601
    # veth:  veth<ID>
602 603 604 605 606 607
    #
    my $itype = $ifconfig->{"ITYPE"};
    if ($itype eq "alias") {
	return $piface;
    } elsif ($itype eq "vlan") {
	return $itype . $ifconfig->{"VTAG"};
608 609
    } elsif ($itype eq "veth") {
	return $itype . $ifconfig->{"ID"};
610 611 612 613 614 615
    }

    warn("Linux does not support virtual interface type '$itype'\n");
    return undef;
}

616 617 618 619
#
# Generate and return an string that is approriate for putting
# into /etc/hosts.
#
620
sub os_etchosts_line($$$)
621
{
622
    my ($name, $ip, $aliases) = @_;
623
    
624
    return sprintf("%s\t%s %s", $ip, $name, $aliases);
625 626 627 628 629 630 631 632 633 634 635 636
}

#
# Add a new group
# 
sub os_groupadd($$)
{
    my($group, $gid) = @_;

    return system("$GROUPADD -g $gid $group");
}

637 638 639 640 641 642 643 644 645 646
#
# Delete an old group
# 
sub os_groupdel($)
{
    my($group) = @_;

    return system("$GROUPDEL $group");
}

647 648 649 650 651 652 653 654 655 656 657 658 659
#
# Remove a user account.
# 
sub os_userdel($)
{
    my($login) = @_;

    return system("$USERDEL $login");
}

#
# Modify user group membership.
# 
660
sub os_usermod($$$$$$)
661
{
662
    my($login, $gid, $glist, $pswd, $root, $shell) = @_;
663 664 665 666 667 668 669

    if ($root) {
	$glist = join(',', split(/,/, $glist), "root");
    }
    if ($glist ne "") {
	$glist = "-G $glist";
    }
670 671
    # Map the shell into a full path.
    $shell = MapShell($shell);
672

673
    return system("$USERMOD -s $shell -g $gid $glist -p '$pswd' $login");
674 675
}

676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694
#
# Modify user password.
# 
sub os_modpasswd($$)
{
    my($login, $pswd) = @_;

    if (system("$USERMOD -p '$pswd' $login") != 0) {
	warn "*** WARNING: resetting password for $login.\n";
	return -1;
    }
    if ($login eq "root" &&
	system("$USERMOD -p '$pswd' toor") != 0) {
	warn "*** WARNING: resetting password for toor.\n";
	return -1;
    }
    return 0;
}

695 696 697
#
# Add a user.
# 
698
sub os_useradd($$$$$$$$$)
699
{
700
    my($login, $uid, $gid, $pswd, $glist, $homedir, $gcos, $root, $shell) = @_;
Mike Hibler's avatar
Mike Hibler committed
701
    my $args = "";
702 703 704 705 706

    if ($root) {
	$glist = join(',', split(/,/, $glist), "root");
    }
    if ($glist ne "") {
Mike Hibler's avatar
Mike Hibler committed
707
	$args .= "-G $glist ";
708
    }
Mike Hibler's avatar
Mike Hibler committed
709 710 711
    # If remote, let it decide where to put the homedir.
    if (!REMOTE()) {
	$args .= "-d $homedir ";
712

713 714 715 716 717 718 719 720 721 722 723 724 725
	# Locally, if directory exists and is populated, skip -m
	# and make sure no attempt is made to create.
	if (! -d $homedir || ! -e "$homedir/.cshrc") {
	    $args .= "-m ";
	}
	else {
	    #
	    # -M is Redhat only option?  Overrides default CREATE_HOME.
	    # So we see if CREATE_HOME is set and if so, use -M.
	    #
	    if (!system("grep -q CREATE_HOME /etc/login.defs")) {
		$args .= "-M ";
	    }
Mike Hibler's avatar
Mike Hibler committed
726
	}
727
    }
Mike Hibler's avatar
Mike Hibler committed
728 729
    elsif (!PLAB()) {
	my $marg = "-m";
730

Mike Hibler's avatar
Mike Hibler committed
731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750
	#
	# XXX DP hack
	# Only force creation of the homdir if the default homedir base
	# is on a local FS.  On the DP, all nodes share a homedir base
	# which is hosted on one of the nodes, so we create the homedir
	# only on that node.
	#
	$defhome = `$USERADD -D 2>/dev/null`;
	if ($defhome =~ /HOME=(.*)/) {
	    if (!os_islocaldir($1)) {
		$marg = "";
	    }
	}

	# populate on remote nodes. At some point will tar files over.
	$args .= $marg;
    }

    # Map the shell into a full path.
    $shell = MapShell($shell);
751
    my $oldmask = umask(0022);
Mike Hibler's avatar
Mike Hibler committed
752 753 754

    if (system("$USERADD -u $uid -g $gid $args -p '$pswd' ".
	       "-s $shell -c \"$gcos\" $login") != 0) {
755
	warn "*** WARNING: $USERADD $login error.\n";
756
	umask($oldmask);
757 758
	return -1;
    }
759
    umask($oldmask);
760 761 762
    return 0;
}

763 764 765 766 767 768 769 770
#
# Remove a homedir. Might someday archive and ship back.
#
sub os_homedirdel($$)
{
    return 0;
}

771 772 773 774 775 776 777 778 779 780 781 782 783
#
# Create a directory including all intermediate directories.
#
sub os_mkdir($$)
{
    my ($dir, $mode) = @_;

    if (system("$MKDIR -p -m $mode $dir")) {
	return 0;
    }
    return 1;
}

784 785 786 787 788 789 790 791
#
# OS Dependent configuration. 
# 
sub os_setup()
{
    return 0;
}
    
792 793 794 795 796 797 798 799 800 801 802
#
# OS dependent, routing-related commands
#
sub os_routing_enable_forward()
{
    my $cmd;

    $cmd = "sysctl -w net.ipv4.conf.all.forwarding=1";
    return $cmd;
}

803
sub os_routing_enable_gated($)
804
{
805
    my ($conffile) = @_;
806 807
    my $cmd;

808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825
    #
    # XXX hack to avoid gated dying with TCP/616 already in use.
    #
    # Apparently the port is used by something contacting ops's
    # portmapper (i.e., NFS mounts) and probably only happens when
    # there are a bazillion NFS mounts (i.e., an experiment in the
    # testbed project).
    #
    $cmd  = "for try in 1 2 3 4 5 6; do\n";
    $cmd .= "\tif `cat /proc/net/tcp | ".
	"grep -E -e '[0-9A-Z]{8}:0268 ' >/dev/null`; then\n";
    $cmd .= "\t\techo 'gated GII port in use, sleeping...';\n";
    $cmd .= "\t\tsleep 10;\n";
    $cmd .= "\telse\n";
    $cmd .= "\t\tbreak;\n";
    $cmd .= "\tfi\n";
    $cmd .= "    done\n";
    $cmd .= "    $GATED -f $conffile";
826 827 828
    return $cmd;
}

829
sub os_routing_add_manual($$$$$;$)
830
{
831
    my ($routetype, $destip, $destmask, $gate, $cost, $rtabid) = @_;
832 833 834 835 836 837
    my $cmd;

    if ($routetype eq "host") {
	$cmd = "$ROUTE add -host $destip gw $gate";
    } elsif ($routetype eq "net") {
	$cmd = "$ROUTE add -net $destip netmask $destmask gw $gate";
838 839
    } elsif ($routetype eq "default") {
	$cmd = "$ROUTE add default gw $gate";
840 841 842 843 844 845 846 847
    } else {
	warn "*** WARNING: bad routing entry type: $routetype\n";
	$cmd = "";
    }

    return $cmd;
}

848
sub os_routing_del_manual($$$$$;$)
849
{
850
    my ($routetype, $destip, $destmask, $gate, $cost, $rtabid) = @_;
851 852 853 854 855 856
    my $cmd;

    if ($routetype eq "host") {
	$cmd = "$ROUTE delete -host $destip";
    } elsif ($routetype eq "net") {
	$cmd = "$ROUTE delete -net $destip netmask $destmask gw $gate";
857 858
    } elsif ($routetype eq "default") {
	$cmd = "$ROUTE delete default";
859 860 861 862 863 864 865 866
    } else {
	warn "*** WARNING: bad routing entry type: $routetype\n";
	$cmd = "";
    }

    return $cmd;
}

867 868 869 870 871 872 873 874 875
# Map a shell name to a full path using /etc/shells
sub MapShell($)
{
   my ($shell) = @_;

   if ($shell eq "") {
       return $DEFSHELL;
   }

876 877 878 879 880
   #
   # May be multiple lines (e.g., /bin/sh, /usr/bin/sh, etc.) in /etc/shells.
   # Just use the first entry.
   #
   my @paths = `grep '/${shell}\$' $SHELLS`;
881 882 883
   if ($?) {
       return $DEFSHELL;
   }
884 885
   my $fullpath = $paths[0];
   chomp($fullpath);
886

887 888
   # Sanity Checks
   if ($fullpath =~ /^([-\w\/]*)$/ && -x $fullpath) {
889 890 891 892 893 894 895 896
       $fullpath = $1;
   }
   else {
       $fullpath = $DEFSHELL;
   }
   return $fullpath;
}

Mike Hibler's avatar
Mike Hibler committed
897 898 899 900 901 902 903 904 905 906 907 908 909
# Return non-zero if given directory is on a "local" filesystem
sub os_islocaldir($)
{
    my ($dir) = @_;
    my $rv = 0; 

    my @dfoutput = `$DF -l $dir 2>/dev/null`;
    if (grep(!/^filesystem/i, @dfoutput) > 0) {
	$rv = 1;
    }
    return $rv;
}

910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925
sub os_getnfsmounts($)
{
    my ($rptr) = @_;
    my %mounted = ();

    #
    # Grab the output of the mount command and parse. 
    #
    if (! open(MOUNT, "/bin/mount|")) {
	print "os_getnfsmounts: Cannot run mount command\n";
	return -1;
    }
    while (<MOUNT>) {
	if ($_ =~ /^([-\w\.\/:\(\)]+) on ([-\w\.\/]+) type (\w+) .*$/) {
	    # Check type for nfs string.
	    if ($3 eq "nfs") {
926
		# Key is the remote NFS path, value is the mount point path.
927 928 929 930 931 932 933 934 935
		$mounted{$1} = $2;
	    }
	}
    }
    close(MOUNT);
    %$rptr = %mounted;
    return 0;
}

936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978
sub os_fwconfig_line($@)
{
    my ($fwinfo, @fwrules) = @_;
    my ($upline, $downline);
    my $errstr = "*** WARNING: Linux firewall not implemented\n";


    warn $errstr;
    $upline = "echo $errstr; exit 1";
    $downline = "echo $errstr; exit 1";

    return ($upline, $downline);
}

sub os_fwrouteconfig_line($$$)
{
    my ($orouter, $fwrouter, $routestr) = @_;
    my ($upline, $downline);

    #
    # XXX assume the original default route should be used to reach servers.
    #
    # For setting up the firewall, this means we create explicit routes for
    # each host via the original default route.
    #
    # For tearing down the firewall, we just remove the explicit routes
    # and let them fall back on the now re-established original default route.
    #
    $upline  = "for vir in $routestr; do\n";
    $upline .= "        $ROUTE delete \$vir >/dev/null 2>&1\n";
    $upline .= "        $ROUTE add -host \$vir gw $orouter || {\n";
    $upline .= "            echo \"Could not establish route for \$vir\"\n";
    $upline .= "            exit 1\n";
    $upline .= "        }\n";
    $upline .= "    done";

    $downline  = "for vir in $routestr; do\n";
    $downline .= "        $ROUTE delete \$vir >/dev/null 2>&1\n";
    $downline .= "    done";

    return ($upline, $downline);
}

979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145
# proto for a function used in os_ifdynconfig_cmds
sub getCurrentIwconfig($;$);

#
# Returns a list of commands needed to change the current device state to 
# something matching the given configuration options.
#
sub os_ifdynconfig_cmds($$$$$) 
{
    my ($ret_aref,$iface,$action,$optref,$ifcfg) = @_;
    my %opts = %$optref;
    my %flags = ();
    # this is the hash returned from getifconfig, but only for this interface
    my %emifc = %$ifcfg;

    my @cmds = ();

    # only handle the atheros case for now, since it's the only one
    # that can be significantly parameterized
    if (exists($emifc{'TYPE'}) && $emifc{'TYPE'} eq 'ath') {
	my ($ifnum) = $iface =~ /wifi(\d+)/;
        my $ath = "ath${ifnum}";
	my $wifi = $iface;

	# check flags
	my ($reset_wlan,$reset_kmod,$remember) = (0,0,0);
	if (exists($opts{'resetkmod'}) && $opts{'resetkmod'} == 1) {
	    $reset_kmod = 1;
	    # note that this forces a wlan reset too!
	    $reset_wlan = 1;
	    delete $opts{'resetkmod'};
	}
	if (exists($flags{'resetwlan'}) && $opts{'resetwlan'} == 1) {
	    $reset_wlan = 1;
	    delete $opts{'resetwlan'};
	}
	# we only want to try to keep similar config options
	# if the user tells us to...
	if (exists($flags{'usecurrent'}) && $opts{'usecurrent'} == 1) {
	    $remember = 1;
	    delete $opts{'usecurrent'};
	}

	# handle the up/down case right away.
	if (($action eq 'up' || $action eq 'down') 
	    && scalar(keys(%opts)) == 0) {
	    push @cmds,"$IFCONFIGBIN $ath $action";
	    @$ret_aref = @cmds;
	    return 0;
	}

	# first grab as much current state as we can, so we don't destroy
	# previous state if we have to destroy the VAP (i.e., athX) interface
	# 
	# NOTE that we don't bother grabbing current ifconfig state --
	# we assume that the current state is just what Emulab configured!
	my $iwc_ref = getCurrentIwconfig($ath);
	my %iwc = %$iwc_ref;

	# hash containing new config:
	my %niwc;

	# first, whack the emulab and user-supplied configs
	# so that the iwconfig params match what we need to give iwconfig
	# i.e., emulab specifies ssid and we need essid.
	if (exists($emifc{'ssid'})) {
	    $emifc{'essid'} = $emifc{'ssid'};
	    delete $emifc{'ssid'};
	}
	if (exists($opts{'ssid'})) {
	    $opts{'essid'} = $opts{'ssid'};
	    delete $opts{'ssid'};
	}
	if (exists($opts{'ap'})) {
	    $opts{'accesspoint'} = $opts{'ap'};
	    delete $opts{'ap'};
	}
	# we want this to be determined by the keyword 'freq' to iwconfig, 
	# not channel
	if (exists($opts{'channel'}) && !exists($opts{'freq'})) {
	    $opts{'freq'} = $opts{'channel'};
	}

	for my $ok (keys(%opts)) {
	    print STDERR "opts kv $ok=".$opts{$ok}."\n";
	}
	for my $tk (keys(%iwc)) {
	    print STDERR "iwc kv $tk=".$iwc{$tk}."\n";
	}

	# here's how we set things up: we set niwc to emulab wireless data
	# (i.e., INTERFACE_SETTINGs), then add in any current state, then
	# add in any of the reconfig options.
	my $key;
	if ($remember) {
	    for $key (keys(%{$emifc{'SETTINGS'}})) {
		$niwc{$key} = $emifc{'SETTINGS'}->{$key};
	    }
	    for $key (keys(%iwc)) {
		$niwc{$key} = $iwc{$key};
	    }
	}
	for $key (keys(%opts)) {
	    $niwc{$key} = $opts{$key};
	}

	for my $nk (keys(%niwc)) {
	    print STDERR "niwc kv $nk=".$niwc{$nk}."\n";
	}

	# see what has changed and what we're going to have to do
	my ($mode_ch,$proto_ch) = (0,0);

	# first, change mode to a string matching those returned by iwconfig:
	if (exists($niwc{'mode'})) {
	    if ($niwc{'mode'} =~ /ad[\s\-]{0,1}hoc/i) {
		$niwc{'mode'} = 'Ad-Hoc';
	    }
	    elsif ($niwc{'mode'} =~ /monitor/i) {
		$niwc{'mode'} = "Monitor";
	    }
	    elsif ($niwc{'mode'} =~ /ap/i
		   || $niwc{'mode'} =~ /master/i) {
		$niwc{'mode'} = "Master";
	    }
	    elsif ($niwc{'mode'} =~ /sta/i 
		   || $niwc{'mode'} =~ /managed/i) {
		$niwc{'mode'} = 'Managed';
	    }
	    else {
		print STDERR "ERROR: invalid mode '" . $niwc{'mode'} . "'\n";
		return 10;
	    }
	}

	# also change protocol, sigh
	if (exists($niwc{'protocol'})) {
	    if ($niwc{'protocol'} =~ /(802){0,1}11a/) {
		$niwc{'protocol'} = '80211a';
	    }
	    elsif ($niwc{'protocol'} =~ /(802){0,1}11b/) {
		$niwc{'protocol'} = '80211b';
	    }
	    elsif ($niwc{'protocol'} =~ /(802){0,1}11g/) {
		$niwc{'protocol'} = '80211g';
	    }
	    else {
		print STDERR "ERROR: invalid protocol '" . $niwc{'protocol'} . 
		    "'\n";
		return 11;
	    }
	}

	# to be backwards compat:
	# If the user sets a mode, we will put the device in that mode.
	# If the user does not set a mode, but does set an accesspoint, 
	#   we force the mode to either Managed or Master.
	# If the user sets neither a mode nor accesspoint, but we are told to
	#   "remember" the current state, we use that mode and ap.
	if (exists($opts{'mode'})) {
	    if ($niwc{'mode'} eq 'Managed' && exists($niwc{'accesspoint'})) {
		# strip colons and lowercase to check if we are the accesspoint
		# or a station:
		my $tap = $niwc{'accesspoint'};
		$tap =~ s/://g;
		$tap = lc($tap);
		
1146
		my $tmac = lc($emifc{'MAC'});
1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165
		
		if ($tap eq $tmac) {
		    # we are going to be the accesspoint; switch our mode to
		    # master
		    $niwc{'mode'} = 'Master';
		}
		else {
		    $niwc{'mode'} = 'Managed';
		    $niwc{'ap'} = $tap;
		}
	    }
	}
	elsif (exists($opts{'accesspoint'})) {
	    # strip colons and lowercase to check if we are the accesspoint
	    # or a station:
	    my $tap = $niwc{'accesspoint'};
	    $tap =~ s/://g;
	    $tap = lc($tap);
	    
1166
	    my $tmac = lc($emifc{'MAC'});
1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281
	    
	    if ($tap eq $tmac) {
		# we are going to be the accesspoint; switch our mode to
		# master
		$niwc{'mode'} = 'Master';
	    }
	    else {
		$niwc{'mode'} = 'Managed';
		$niwc{'ap'} = $tap;
	    }
	}
	elsif ($remember) {
	    # swipe first the old emulab config state, then the current
	    # iwconfig state:
	    
	    # actually, this was already done above.
	}

	# get rid of ap option if we're the master:
	if (exists($niwc{'mode'}) && $niwc{'mode'} eq 'Master') {
	    delete $niwc{'ap'};
	}

	print STDERR "after whacking niwc into compliance:\n";
	for my $nk (keys(%niwc)) {
	    print STDERR "niwc kv $nk=".$niwc{$nk}."\n";
	}

	# assemble params to commands:
	my ($iwc_mode,$wlc_mode);
	my $iwp_mode;

	if (exists($niwc{'mode'}) && $niwc{'mode'} ne $iwc{'mode'}) {
	    $mode_ch = 1;
	}
	
	if (exists($niwc{'mode'})) {
	    $iwc_mode = $niwc{'mode'};
	    if ($niwc{'mode'} eq 'Ad-Hoc') {
		$wlc_mode = 'adhoc';
	    }
	    elsif ($niwc{'mode'} eq 'Managed') {
		$wlc_mode = 'sta';
	    }
	    elsif ($niwc{'mode'} eq 'Monitor') {
		$wlc_mode = 'monitor';
	    }
	    elsif ($niwc{'mode'} eq 'Master') {
		$wlc_mode = 'ap';
	    }
	}

	if (exists($niwc{'protocol'})) {
	    if ($niwc{'protocol'} ne $iwc{'protocol'}) {
		$proto_ch = 1;
	    }
	    
	    if ($niwc{'protocol'} eq '80211a') {
		$iwp_mode = 1;
	    }
	    elsif ($niwc{'protocol'} eq '80211b') {
		$iwp_mode = 2;
	    }
	    elsif ($niwc{'protocol'} eq '80211g') {
		$iwp_mode = 3;
	    }
	}

	# for atheros cards, if we have to change the mode, we have to 
	# first tear down the VAP and rerun wlanconfig, then reconstruct
	# and reconfig the VAP.
	if ($mode_ch == 1) {
	    $reset_wlan = 1;
	}

        # Log what we're going to do:
	if ($reset_wlan && defined($wlc_mode)) {
	    print STDERR "WLANCONFIG: iface=$wifi; mode=$wlc_mode\n";
	}
	if (($proto_ch || $reset_wlan) && defined($iwp_mode)) {
	    print STDERR "IWPRIV: proto=".$niwc{'protocol'}." ($iwp_mode)\n";
	}
	if ($reset_wlan) {
	    print STDERR "IFCONFIG: iface=$ath; ip=" . $emifc{'IPADDR'} . 
		"; netmask=" . $emifc{'IPMASK'} . "\n";
	}

	# assemble iwconfig params:
	my $iwcstr = '';
	if (exists($niwc{'essid'})) {
	    $iwcstr .= ' essid ' . $niwc{'essid'};
	}
	if (exists($niwc{'freq'})) {
	    $iwcstr .= ' freq ' . $niwc{'freq'};
	}
	if (exists($niwc{'rate'})) {
	    $iwcstr .= ' rate ' . $niwc{'rate'};
	}
	if (exists($niwc{'txpower'})) {
	    $iwcstr .= ' txpower ' . $niwc{'txpower'};
	}
	if (exists($niwc{'sens'})) {
	    $iwcstr .= ' sens ' . $niwc{'sens'};
	}
	if (exists($niwc{'rts'})) {
	    $iwcstr .= ' rts ' . $niwc{'rts'};
	}
	if (exists($niwc{'frag'})) {
	    $iwcstr .= ' frag ' . $niwc{'frag'};
	}
	if (defined($iwc_mode) && $iwc_mode ne '') {
	    $iwcstr .= " mode $iwc_mode";
	    
	    if ($iwc_mode eq 'Managed') {
		if (exists($niwc{'ap'})) {
1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294
		    if (!($niwc{'ap'} =~ /:/)) {
                        # I really dislike perl sometimes.
                        $iwcstr .= ' ap ' .
                            substr($niwc{'ap'},0,2) . ":" .
                            substr($niwc{'ap'},2,2) . ":" .
                            substr($niwc{'ap'},4,2) . ":" .
                            substr($niwc{'ap'},6,2) . ":" .
                            substr($niwc{'ap'},8,2) . ":" .
                            substr($niwc{'ap'},10,2);
                    }
                    else {
			$iwcstr .= ' ap ' . $niwc{'ap'};
		    }
1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451
		}
		else {
		    $iwcstr .= ' ap any';
		}
	    }
	}

	print STDERR "IWCONFIG: $iwcstr\n";

        #
        # Generate commands to reconfigure the device.
        #
	if ($action eq 'up') {
	    push @cmds,"$IFCONFIGBIN $ath $action";
	}

	if ($reset_wlan) {
	    push @cmds,"$IFCONFIGBIN $ath down";
	    push @cmds,"$IFCONFIGBIN $wifi down";
	    push @cmds,"$WLANCONFIG $ath destroy";
	    
	    if ($reset_kmod) {
		## also "reset" the kernel modules:
		push @cmds,"$RMMOD ath_pci ath_rate_sample ath_hal";
		push @cmds,"$RMMOD wlan_scan_ap wlan_scan_sta wlan";
		push @cmds,"$MODPROBE ath_pci autocreate=none";
	    }
	    
	    push @cmds,"$WLANCONFIG $ath create wlandev $wifi " . 
		"wlanmode $wlc_mode";
	}
	if (($proto_ch || $mode_ch || $reset_wlan) && defined($iwp_mode)) {
	    push @cmds,"$IWPRIV $ath mode $iwp_mode";
	}
	push @cmds,"$IWCONFIG $ath $iwcstr";
	if ($reset_wlan) {
	    push @cmds,"$IFCONFIGBIN $ath inet " . $emifc{'IPADDR'} . 
		" netmask " . $emifc{'IPMASK'} . " up";
	    # also make sure routing is up for this interface
	    push @cmds,"/var/emulab/boot/rc.route " . $emifc{'IPADDR'} . " up";
	}

	# We don't do this right now because when we have to reset
	# wlan state to force a new mode, we panic the kernel if we 
	# do a wlanconfig without first destroying any monitor mode VAPs.
	# What's more, I haven't found a way to see which VAP is attached to
	# which real atheros device.
	
	#if ($do_mon_vdev) {
	#    $athmon = "ath" . ($iface_num + 10);
	#    push @cmds,"$WLANCONFIG $athmon create wlandev $wifi wlanmode monitor";
	#    push @cmds,"$IFCONFIGBIN $athmon up";
	#}

	if ($action eq 'down') {
	    push @cmds,"$IFCONFIGBIN $ath $action";
	}
    }
    elsif (exists($emifc{'TYPE'}) && $emifc{'TYPE'} eq 'flex900') {
	# see if we have any flags...
	$resetkmod = 0;
	if (exists($opts{'resetkmod'}) && $opts{'resetkmod'} == 1) {
	    $resetkmod = 1;
	}

	# check args -- we MUST have freq and rate.
	my ($freq,$rate,$carrierthresh,$rxgain);

	if (!exists($opts{'protocol'})
	    || $opts{'protocol'} ne 'flex900') {
	    warn("*** WARNING: Unknown gnuradio protocol specified, " . 
		 "assuming flex900!\n");
        }

	if (exists($opts{'frequency'})) {
	    $freq = $opts{'frequency'};
	}
	elsif (exists($opts{'freq'})) {
            $freq = $opts{'freq'};
        }
	else {
	    warn("*** WARNING: No frequency specified for gnuradio ".
                 "interface!\n");
            return undef;
	}

	if (exists($opts{'rate'})) {
	    $rate = $opts{'rate'};
	}
	else {
	    warn("*** WARNING: No rate specified for gnuradio interface!\n");
            return undef;
        }

	if (exists($opts{'carrierthresh'})) {
	    $carrierthresh = $opts{'carrierthresh'};
	}
	if (exists($opts{'rxgain'})) {
	    $rxgain = $opts{'rxgain'};
	}

	#
	# Generate commands
	#
	push @cmds,"$IFCONFIGBIN $iface down";

	# find out if we have to kill the current tunnel process...
	my $tpid;
	if (!open(PSP, "ps axwww 2>&1 |")) {
	    print STDERR "ERROR: open: $!"; 
	    return 19;
	}
	while (my $psl = <PSP>) {
	    if ($psl =~ /\s*(\d+)\s*.*emulab\/tunnel\.py.*/) {
		$tpid = $1;
		last;
	    }
	}
	close(PSP);
	if (defined($tpid)) {
	    push @cmds,"kill $tpid";
	}

	if ($resetkmod) {
	    push @cmds,"/sbin/rmmod tun";
	    push @cmds,"/sbin/modprobe tun";
	}

	my $tuncmd = 
	    "/bin/env PYTHONPATH=/usr/local/lib/python2.4/site-packages " .
	    "$BINDIR/tunnel.py -f $freq -r $rate";
	if (defined($carrierthresh)) {
	    $tuncmd .= " -c $carrierthresh";
	}
	if (defined($rxgain)) {
	    $tuncmd .= " -rx-gain=$rxgain";
	}
	$tuncmd .= " > /dev/null 2>&1 &";
	push @cmds,$tuncmd;

	# Give the tun device time to come up
	push @cmds,"sleep 2";

	my $mac = $emifc{'MAC'};
	push @cmds,"$IFCONFIGBIN $iface hw ether $mac";
	push @cmds,"$IFCONFIGBIN $iface inet " . $emifc{'IPADDR'} .
	    " netmask " . $emifc{'IPMASK'} . " up";
	# also make sure routing is up for this interface
	push @cmds,"/var/emulab/boot/rc.route " . $emifc{'IPADDR'} . " up";
    }
    
    @$ret_aref = @cmds;
    
    return 0;
}

my %def_iwconfig_regex = ( 'protocol' => '.+(802.*11[abg]{1}).*',
1452
			   'essid'    => '.+SSID:\s*"*([\w\d_\-\.]+)"*.*',
1453 1454 1455 1456
			   'mode'     => '.+Mode:([\w\-]+)\s+',
			   'freq'     => '.+Frequency:(\d+\.\d+\s*\w+).*',
			   'ap'       => '.+Access Point:\s*([0-9A-Za-z\:]+).*',
			   'rate'     => '.+Rate[:|=]\s*(\d+\s*[\w\/]*)\s*',
1457
			   'txpower'  => '.+ower[:|=](\d+\s*[a-zA-Z]+).*',
1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542
			   'sens'     => '.+Sensitivity[:|=](\d+).*',
                           # can't set this on our atheros cards
                           #'retry'    => '.+Retry[:|=](\d+|off).*',
			   'rts'      => '.+RTS thr[:|=](\d+|off).*',
			   'frag'     => '.+Fragment thr[:|=](\d+|off).*',
                           # don't care about this on our cards
                           #'power'    => '.+Power Management[:|=](\d+|off).*',
			 );

#
# Grab current iwconfig data for a specific interface, based on the 
# specified regexps (which default to def_iwconfig_regex if unspecified).
# Postprocess the property values so that they can be stuck back into iwconfig.
#
sub getCurrentIwconfig($;$) {
    my ($dev,$regex_ref) = @_;
    my %regexps;

    if (!defined($dev) || $dev eq '') {
        return;
    }
    if (!defined($regex_ref)) {
	%regexps = %def_iwconfig_regex;
    }
    else {
	%regexps = %$regex_ref;
    }

    my %r = ();
    my @output = `$IWCONFIG`;

    my $foundit = 0;
    foreach my $line (@output) {
        if ($line =~ /^$dev/) {
            $foundit = 1;
        }
        elsif ($foundit && !($line =~ /^\s+/)) {
            last;
        }

        if ($foundit) {
            foreach my $iwprop (keys(%regexps)) {
                my $regexp = $regexps{$iwprop};
                if ($line =~ /$regexp/) {
                    $r{$iwprop} = $1;
                }
            }    
        }
    }
     
    # postprocessing.
    # We change the values back to valid args to the iwconfig command
    if (defined($r{'protocol'})) {
        $r{'protocol'} =~ s/\.//g;
    }
     
    if (defined($r{'rate'})) {
        if ($r{'rate'} =~ /^(\d+) Mb\/s/) {
            $r{'rate'} = "${1}M";
        }
        else {
            $r{'rate'} = $1;
        }
    }

    if (defined($r{'txpower'})) {
        if ($r{'txpower'} =~ /^(\d+)/) {
            $r{'txpower'} = $1;
        }
        else {
            $r{'txpower'} = 'auto';
        }
    }

    if (defined($r{'freq'})) {
        $r{'freq'} =~ s/\s//g;
    }

    foreach my $rk (keys(%r)) {
	print STDERR "gci $rk=".$r{$rk}."\n";
    }
     
    return \%r;
}

1543 1544 1545 1546 1547 1548 1549 1550 1551
sub os_config_gre($$$$$$$)
{
    my ($name, $unit, $inetip, $peerip, $mask, $srchost, $dsthost) = @_;

    my $dev = "$name$unit";

    if (system("ip tunnel add $dev mode gre remote $dsthost local $srchost") ||
	system("ip link set $dev up") ||
	system("ip addr add $inetip dev $dev") ||
1552
	system("$IFCONFIGBIN $dev netmask $mask")) {
1553 1554 1555 1556 1557 1558
	warn("Could not start tunnel!\n");
	return -1;
    }
    return 0;
}

1559 1560 1561 1562
sub os_get_disks
{
	my @blockdevs;

1563
	@blockdevs = map { s#/sys/block/##; $_ } glob('/sys/block/*');
1564 1565 1566 1567 1568 1569

	return @blockdevs;
}

sub os_get_disk_size($)
{
1570
	my ($disk) = @_;
1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591
	my $size;

	$disk =~ s#^/dev/##;

	if (!open SIZE, "/sys/block/$disk/size") {
		warn "Couldn't open /sys/block/$disk/size: $!\n";
		return undef;
	}
	$size = <SIZE>;
	close SIZE;
	chomp $size;

	$size = $size * 512 / 1024 / 1024;

	return $size;
}

sub os_get_partition_info($$)
{
    my ($bootdev, $partition) = @_;

1592 1593
    $bootdev =~ s#^/dev/##;

1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619
    if (!open(FDISK, "fdisk -l /dev/$bootdev |")) {
	print("Failed to run fdisk on /dev/$bootdev!");
	return -1;
    }

    while (<FDISK>) {
	    next if (!m#^/dev/$bootdev$partition\s+#);

	    s/\*//;

	    my ($length, $ptype) = (split /\s+/)[3,4];

	    $length =~ s/\+$//;
	    $ptype = hex($ptype);

	    close FDISK;

	    return ($length, $ptype);
    }

    print "No such partition in fdisk summary info for MBR on /dev/$bootdev!\n";
    close FDISK;

    return -1;
}

1620
1;