summaryrefslogtreecommitdiffstats
path: root/rc.inet1
blob: ebbd2431415328523f0a937aa0d1bfd45c63bba5 (plain)
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
#!/bin/bash
# /etc/rc.d/rc.inet1
# This script is used to bring up the various network interfaces.
#
# @(#)/etc/rc.d/rc.inet1 10.2  Sun Jul 24 12:45:56 PDT 2005  (pjv)

############################
# READ NETWORK CONFIG FILE #
############################

# Get the configuration information from /etc/rc.d/rc.inet1.conf:
. /etc/rc.d/rc.inet1.conf

###########
# LOGGING #
###########

# If possible, log events in /var/log/messages:
if [ -f /var/run/syslogd.pid ] && [ -x /usr/bin/logger ]; then
  LOGGER=/usr/bin/logger
else # output to stdout/stderr:
  LOGGER=/bin/cat
fi

# Handy wrapper for verbose logging
debug_log() {
  if [ "$DEBUG_ETH_UP" = "yes" ]; then
    echo "/etc/rc.d/rc.inet1:  $*" | $LOGGER
  fi
}

############################
# DETERMINE INTERFACE LIST #
############################

# Compose a list of interfaces from /etc/rc.d/rc.inet1.conf (with a maximum
# of 6 interfaces, but you can easily enlarge the interface limit
# - send me a picture of such a box :-).
# If a value for IFNAME[n] is not set, we assume it is an eth'n' interface.
# This way, the new script is compatible with older rc.inet1.conf files.
# The IFNAME array will be used to determine which interfaces to bring up/down.
MAXNICS=${MAXNICS:-6}
i=0
while [ $i -lt $MAXNICS ];
do
  IFNAME[$i]=${IFNAME[$i]:=eth${i}}
  i=$(($i+1))
done
debug_log "List of interfaces: '${IFNAME[*]}'"

####################
# PRE-LOAD MODULES #
####################

for i in "${IFNAME[@]}"; do
  # If the interface isn't in the kernel yet (but there's an alias for it in modules.conf),
  # then it should be loaded first:
  if [ ! -e /sys/class/net/${i%%:*} ]; then # no interface yet
    if /sbin/modprobe -c | grep -v "^#" | grep -w "alias ${i%%:*}" | grep -vw "alias ${i%%:*} off" >/dev/null; then
      echo "/etc/rc.d/rc.inet1:  /sbin/modprobe ${i%%:*}" | $LOGGER
      /sbin/modprobe ${i%%:*}
      _DID_MODPROBE=1
    fi
  fi
done
# Normally the ipv6 module would be automatically loaded when the first IP is assigned to an
# interface (assuming ipv6 has not been disabled entirely), but autoconf/accept_ra need to be
# set to 0 before that happens, so try to pre-load ipv6 here.
if [ ! -e /proc/sys/net/ipv6 ]; then
  /sbin/modprobe ipv6
  _DID_MODPROBE=1
fi
# If we did any module loading in the blocks above, sleep for a couple of
# seconds to give time for everything to "take"
[ -n "${_DID_MODPROBE}" ] && sleep 2
unset _DID_MODPROBE

######################
# LOOPBACK FUNCTIONS #
######################

# Function to bring up the loopback interface.  If loopback is
# already up, do nothing.
lo_up() {
  if [ -e /sys/class/net/lo ]; then
    if ! /sbin/ip link show dev lo | grep -wq -e "state UP" -e "state UNKNOWN" ; then
      echo "/etc/rc.d/rc.inet1:  /sbin/ip address add 127.0.0.1/8 dev lo" | $LOGGER
      /sbin/ip address add 127.0.0.1/8 dev lo
      /sbin/ip link set dev lo up
      echo "/etc/rc.d/rc.inet1:  /sbin/ip route add 127.0.0.0/8 dev lo" | $LOGGER
      /sbin/ip route add 127.0.0.0/8 dev lo
    fi
  fi
}

# Function to take down the loopback interface:
lo_down() {
  if [ -e /sys/class/net/lo ]; then
    echo "/etc/rc.d/rc.inet1:  /sbin/ip address flush dev lo" | $LOGGER
    /sbin/ip address flush dev lo
    echo "/etc/rc.d/rc.inet1:  /sbin/ip link set dev lo down" | $LOGGER
    /sbin/ip link set dev lo down
  fi
}

#######################
# INTERFACE FUNCTIONS #
#######################

# Function to create virtual interfaces
virtif_create() {
  # argument is 'i' - the position of this interface in the VIRTIFNAME array.
  # this loop goes from i=0 to i=number_of_configured_virtual_interfaces_minus_one
  # which means it doesn't do anything if there are none.
  for i in $(seq 0 $((${#VIRTIFNAME[@]} - 1))); do
    /sbin/ip tuntap add dev ${VIRTIFNAME[$i]} mode ${VIRTIFTYPE[$i]} user ${VIRTIFUSER[$i]} group ${VIRTIFGROUP[$i]}
  done
}

# Function to destory virtual interfaces
virtif_destroy() {
  # argument is 'i' - the position of this interface in the VIRTIFNAME array.
  for i in $(seq 0 $((${#VIRTIFNAME[@]} - 1))); do
    /sbin/ip tuntap del dev ${VIRTIFNAME[$i]} mode ${VIRTIFTYPE[$i]}
  done
}

# Function to assemble a bridge interface.
br_open() {
  # argument is 'i' - the position of this interface in the IFNAME array.
  /sbin/ip link add name ${IFNAME[$1]} type bridge
  for BRIF in ${BRNICS[$1]}; do
    /sbin/ip link set dev $BRIF down
    /sbin/ip address add 0.0.0.0 dev $BRIF
    /sbin/ip link set dev $BRIF master ${IFNAME[$1]}
    /sbin/ip link set dev $BRIF up
  done
  /sbin/ip link set dev ${IFNAME[$1]} up
}

# Function to disassemble a bridge interface.
br_close() {
  /sbin/ip link set dev ${IFNAME[$1]} down
  # argument is 'i' - the position of this interface in the IFNAME array.
  #for BRIF in ${BRNICS[$1]}; do
  for BRIF in $(ls --indicator-style=none /sys/class/net/${IFNAME[$1]}/brif/)
  do
    /sbin/ip link set dev $BRIF nomaster
  done
  /sbin/ip link set dev ${IFNAME[$1]} down
  /sbin/ip link del ${IFNAME[$1]}
}

# Function to bring up a network interface.  If the interface is
# already up or does not yet exist (perhaps because the kernel driver
# is not loaded yet), do nothing.
if_up() {
  # Determine position 'i' of this interface in the IFNAME array:
  i=0
  while [ $i -lt $MAXNICS ]; do
    [ "${IFNAME[$i]}" = "${1}" ] && break
    i=$(($i+1))
  done
  # If "i" is greater or equal to "MAXNICS" at this point, it means we didn't
  # find an entry in IFNAME array corresponding to "$1", which likely means
  # there are more interfaces configured than MAXNICS. Let's err on the
  # side of caution and do nothing instead of possibly doing the wrong thing.
  if [ $i -ge $MAXNICS ]; then
    echo "/etc/rc.d/rc.inet1:  skipping ${1}, you might need to increase MAXNICS" | $LOGGER
    return
  fi
  # If the interface is a bridge, then create it first:
  [ -n "${BRNICS[$i]}" ] && br_open $i
  # Skip unconfigured interfaces:
  if [ -z "${IPADDR[$i]}" ] && [ "${USE_DHCP[$i]}" != "yes" ] && [ -z "${IP6ADDRS[$i]}" ] && \
      [ "${USE_DHCP6[$i]}" != "yes" ] && [ "${USE_SLAAC[$i]}" != "yes" ]; then
    debug_log "skipping ${1} early, interface is not configured in /etc/rc.d/rc.inet1.conf"
    return
  fi
  if [ -e /sys/class/net/${1%%:*} ]; then # interface exists
    if ! /sbin/ip address show scope global dev ${1} 2>/dev/null | grep -Ewq '(inet|inet6)' || \
        ! /sbin/ip link show dev ${1} | grep -wq "state UP"; then # interface not up or not configured
      # Set hardware address _before_ the interface goes up:
      if [ -n "${HWADDR[$i]}" ]; then
        echo "/etc/rc.d/rc.inet1:  /sbin/ip link set dev ${1} address ${HWADDR[$i]}" | $LOGGER
        /sbin/ip link set dev ${1} address ${HWADDR[$i]}
      fi
      # Initialize any wireless parameters:
      if [ -x /etc/rc.d/rc.wireless ]; then
        . /etc/rc.d/rc.wireless ${1} start
      fi
      if [ -e /proc/sys/net/ipv6 ]; then # ipv6 networking is available
        # Disable v6 IP auto configuration before trying to bring up the interface:
        echo "0" >/proc/sys/net/ipv6/conf/$1/autoconf
        if [ "${USE_RA[$i]}" = "yes" ]; then
          # Unconditionally accept router advertisements on this interface:
          echo "1" >/proc/sys/net/ipv6/conf/$1/accept_ra
        else
          # Disable router advertisments on this interface until SLAAC is enabled:
          echo "0" >/proc/sys/net/ipv6/conf/$1/accept_ra
        fi
      fi
      local IF_UP=0
      # Slackware historically favours dynamic configuration over fixed IP to configure interfaces, so keep that tradition:
      if [ "${USE_DHCP[$i]}" = "yes" ] || { [ -e /proc/sys/net/ipv6 ] && [ "${USE_DHCP6[$i]}" = "yes" ]; }; then # use dhcpcd
        # Declare DHCP_OPTIONS array before adding new options to it:
        declare -a DHCP_OPTIONS=()
        # Set DHCP_OPTIONS for this interface:
        if [ -e /proc/sys/net/ipv6 ]; then
          if [ "${USE_DHCP[$i]}" = "yes" ] && [ "${USE_DHCP6[$i]}" != "yes" ]; then # only try v4 dhcp
            DHCP_OPTIONS+=("-4")
          elif [ "${USE_DHCP[$i]}" != "yes" ] && [ "${USE_DHCP6[$i]}" = "yes" ]; then # only try v6 dhcp
            DHCP_OPTIONS+=("-6")
          fi
        else
          DHCP_OPTIONS+=("-4")
        fi
        [ -n "${DHCP_HOSTNAME[$i]}" ] && DHCP_OPTIONS+=("-h" "${DHCP_HOSTNAME[$i]}")
        [ "${DHCP_KEEPRESOLV[$i]}" = "yes" ] && DHCP_OPTIONS+=("-C" "resolv.conf")
        [ "${DHCP_KEEPNTP[$i]}" = "yes" ] && DHCP_OPTIONS+=("-C" "ntp.conf")
        [ "${DHCP_KEEPGW[$i]}" = "yes" ] && DHCP_OPTIONS+=("-G")
        [ "${DHCP_DEBUG[$i]}" = "yes" ] && DHCP_OPTIONS+=("-d")
        # The -L option used to be hard coded into the dhcpcd command line in -current.  Previous versions did not have
        # this hard coded.  The code here keeps the 14.2 behaviour, but can be altered to make the use of -L default as
        # in -current.  To change the behaviour, alter the test to be:  [ "${DHCP_NOIPV4LL[$i]}" != "no" ]
        [ "${DHCP_NOIPV4LL[$i]}" = "yes" ] && DHCP_OPTIONS+=("-L")
        [ -n "${DHCP_IPADDR[$i]}" ] && DHCP_OPTIONS+=("-r" "${DHCP_IPADDR[$i]}")
        echo "${1}: polling for DHCP server"
        # 15 seconds should be a reasonable default DHCP timeout.  30 was too much.
        echo "/etc/rc.d/rc.inet1:  /sbin/dhcpcd -t ${DHCP_TIMEOUT[$i]:-15} ${DHCP_OPTIONS[@]} ${1}" | $LOGGER
        if /sbin/dhcpcd -t "${DHCP_TIMEOUT[$i]:-15}" "${DHCP_OPTIONS[@]}" ${1}; then
          # Enable accepting of RA packets if explicitly told to:
          if [ -e /proc/sys/net/ipv6 ] && [ "${USE_RA[$i]}" = "yes" ]; then
            echo "1" >/proc/sys/net/ipv6/conf/$1/accept_ra
          fi
          IF_UP=1
        else
          echo "/etc/rc.d/rc.inet1:  failed to obtain DHCP lease for ${1}" | $LOGGER
          /sbin/ip address flush dev ${1}
          /sbin/ip link set dev ${1} down
        fi
      fi
      if [ -e /proc/sys/net/ipv6 ] && [ "${USE_DHCP6[$i]}" != "yes" ] && [ "${USE_SLAAC[$i]}" = "yes" ]; then # configure via SLAAC
        # Enable accepting of RA packets, unless explicitly configured not to:
        if [ "${USE_RA[$i]}" = "no" ]; then
          echo "0" >/proc/sys/net/ipv6/conf/$1/accept_ra
        else
          echo "/etc/rc.d/rc.inet1:  enabling RA for ${1}" | $LOGGER
          echo "1" >/proc/sys/net/ipv6/conf/$1/accept_ra
        fi
        # Enable auto configuration of interfaces:
        echo "/etc/rc.d/rc.inet1:  enabling SLAAC for ${1}" | $LOGGER
        echo "1" >/proc/sys/net/ipv6/conf/$1/autoconf
        # Bring the interface up:
        /sbin/ip link set dev ${1} up
        echo "${1}: waiting for router announcement"
        for ((j = ${SLAAC_TIMEOUT[$i]:=15} * 2; j--;)); do # by default, wait a max of 15 seconds for the interface to configure
          /sbin/ip -6 address show dynamic dev ${1} 2>/dev/null | grep -Ewq 'inet6' && { IF_UP=1; break; }
          sleep 0.5
        done
        if (($IF_UP != 1)); then
          echo "${1}: timed out"
          echo "/etc/rc.d/rc.inet1:  failed to auto configure ${1} after ${SLAAC_TIMEOUT[$i]} seconds" | $LOGGER
          /sbin/ip address flush dev ${1}
          /sbin/ip link set dev ${1} down
        fi
      fi
      if [ "${USE_DHCP[$i]}" != "yes" ] && [ -n "${IPADDR[$i]}" ]; then # add a fixed v4 IP to the interface
        if [ -z "${NETMASK[$i]}" ]; then
          echo "/etc/rc.d/rc.inet1:  no NETMASK set for ${1} - assuming 24 (aka, 255.255.255.0)" | $LOGGER
          NETMASK[$i]="24"
        fi
        echo "/etc/rc.d/rc.inet1:  /sbin/ip -4 address add ${IPADDR[$i]}/${NETMASK[$i]#/} broadcast + dev ${1}" | $LOGGER
        if /sbin/ip -4 address add ${IPADDR[$i]}/${NETMASK[$i]#/} broadcast + dev ${1} && \
            /sbin/ip link set dev ${1} up; then
          IF_UP=1
        else
          echo "/etc/rc.d/rc.inet1:  failed to set IP ${IPADDR[$i]} for ${1}" | $LOGGER
          /sbin/ip address flush dev ${1}
          /sbin/ip link set dev ${1} down
        fi
      fi
      if [ -e /proc/sys/net/ipv6 ] && [ "${USE_DHCP6[$i]}" != "yes" ] && [ "${USE_SLAAC[$i]}" != "yes" ] && \
          [ -n "${IP6ADDRS[$i]}" ]; then # add fixed v6 IPs
        # IPv6's Duplicate Address Detection (DAD) causes a race condition when bringing up interfaces, as
        # described here:  https://www.agwa.name/blog/post/beware_the_ipv6_dad_race_condition
        # Disable DAD while bringing up the interface - but note that this means the loss of detection of a
        # duplicate address.  It's a trade off, unfortunately.
        echo "0" >/proc/sys/net/ipv6/conf/$1/accept_dad
        for v6ip in ${IP6ADDRS[$i]}; do
          ip="${v6ip%/*}"
          prefix="${v6ip#*/}"
          if [ -z "$prefix" ] || [ "$ip" == "$prefix" ]; then
            echo "/etc/rc.d/rc.inet1:  no prefix length set for ${ip} - assuming 64" | $LOGGER
            prefix="64"
          fi
          echo "/etc/rc.d/rc.inet1:  /sbin/ip -6 address add ${ip}/${prefix} dev ${1}" | $LOGGER
          if /sbin/ip -6 address add ${ip}/${prefix} dev ${1} && \
              /sbin/ip link set dev ${1} up; then
            # Enable accepting of RA packets if explicitly told to.
            if [ "${USE_RA[$i]}" = "yes" ]; then
              echo "1" >/proc/sys/net/ipv6/conf/$1/accept_ra
            fi
            IF_UP=1
          else
            echo "/etc/rc.d/rc.inet1:  failed to set IP ${ip} for ${1}" | $LOGGER
            if (($IF_UP != 1)); then # a v4 address was configured, don't flush it
              /sbin/ip address flush dev ${1}
              /sbin/ip link set dev ${1} down
            fi
          fi
        done
      fi
      if (($IF_UP == 1)); then # only do further config if the interface came up
        # Add extra IPv4 and v6 addresses to the interface:
        if [ -n "${IPALIASES[$i]}" ]; then
          num=0
          for ipalias in ${IPALIASES[$i]}; do
            ip="${ipalias%/*}"
            nm="${ipalias#*/}"
            [ -z "$nm" ] || [ "$ip" == "$nm" ] && nm="24"
            echo "/etc/rc.d/rc.inet1:  /sbin/ip -4 address add ${ip}/${nm} broadcast + dev ${1} label ${1}:${num}" | $LOGGER
            if /sbin/ip -4 address add ${ip}/${nm} broadcast + dev ${1} label ${1}:${num}; then
              num=$(($num + 1))
            else
              echo "/etc/rc.d/rc.inet1:  failed to add IP ${ip} to ${1}" | $LOGGER
            fi
          done
        fi
        # Force an MTU (possibly over-riding that set by DHCP or RA):
        if [ -n "${MTU[$i]}" ]; then
          echo "/etc/rc.d/rc.inet1:  /sbin/ip link set dev ${1} mtu ${MTU[$i]}" | $LOGGER
          /sbin/ip link set dev ${1} mtu ${MTU[$i]}
        fi
        # Set promiscuous mode on the interface:
        if [ "${PROMISCUOUS[$i]}" = "yes" ]; then
          echo "/etc/rc.d/rc.inet1:  /sbin/ip link set dev ${1} promisc on" | $LOGGER
          /sbin/ip link set dev ${1} promisc on
        fi
        # Reset accept_dad back to default now all the IPs are configured:
        if [ -e /proc/sys/net/ipv6 ]; then
          cat /proc/sys/net/ipv6/conf/default/accept_dad >/proc/sys/net/ipv6/conf/$1/accept_dad
        fi
      fi
    else
      debug_log "${1} is already up, skipping"
    fi
  else
    debug_log "${1} interface does not exist (yet)"
  fi
}

# Function to take down a network interface:
if_down() {
  # Determine position 'i' of this interface in the IFNAME array:
  i=0
  while [ $i -lt $MAXNICS ]; do
    [ "${IFNAME[$i]}" = "${1}" ] && break
    i=$(($i+1))
  done
  if [ $i -ge $MAXNICS ]; then
    echo "/etc/rc.d/rc.inet1:  skipping ${1}, you might need to increase MAXNICS" | $LOGGER
    return
  fi
  if [ -e /sys/class/net/${1%%:*} ]; then
    if [ "${USE_DHCP[$i]}" = "yes" ] || [ "${USE_DHCP6[$i]}" = "yes" ]; then # take down dhcpcd
      # When using -k, dhcpcd requires some command line options to match those used to invoke it:
      if [ "${USE_DHCP[$i]}" = "yes" ] && [ "${USE_DHCP6[$i]}" != "yes" ]; then # only v4 dhcp
        DHCP_OPTIONS="-4"
      elif [ "${USE_DHCP[$i]}" != "yes" ] && [ "${USE_DHCP6[$i]}" = "yes" ]; then # only v6 dhcp
        DHCP_OPTIONS="-6"
      fi
      echo "/etc/rc.d/rc.inet1:  /sbin/dhcpcd $DHCP_OPTIONS -k -d ${1}" | $LOGGER
      /sbin/dhcpcd $DHCP_OPTIONS -k -d ${1} 2>/dev/null || \
          echo "/etc/rc.d/rc.inet1:  failed to stop dhcpcd for interface ${1}" | $LOGGER
    fi
    # Disable v6 IP auto configuration and RA before trying to clear the IP from the interface:
    if [ -e /proc/sys/net/ipv6 ]; then
      echo "0" >/proc/sys/net/ipv6/conf/$1/autoconf
      echo "0" >/proc/sys/net/ipv6/conf/$1/accept_ra
    fi
    sleep 0.5 # allow time for dhcp/ra to unconfigure the interface
    # Flush any remaining IPs:
    echo "/etc/rc.d/rc.inet1:  /sbin/ip address flush dev ${1}" | $LOGGER
    /sbin/ip address flush dev ${1}
    # Bring the interface down:
    echo "/etc/rc.d/rc.inet1:  /sbin/ip link set dev ${1} down" | $LOGGER
    /sbin/ip link set dev ${1} down
    # Reset autoconf and accept_ra back to defaults:
    if [ -e /proc/sys/net/ipv6 ]; then
      cat /proc/sys/net/ipv6/conf/default/autoconf >/proc/sys/net/ipv6/conf/$1/autoconf
      cat /proc/sys/net/ipv6/conf/default/accept_ra >/proc/sys/net/ipv6/conf/$1/accept_ra
    fi
    # Kill wireless daemons if any:
    if [ -x /etc/rc.d/rc.wireless ]; then
      . /etc/rc.d/rc.wireless ${1} stop
    fi
    # If the interface is a bridge, then destroy it now:
    if [ -n "${BRNICS[$i]}" ]; then
      br_close $i
    fi
  fi
}

#####################
# GATEWAY FUNCTIONS #
#####################

# Function to bring up the gateway if there is not yet a default route:
gateway_up() {
  # Bring up the IPv4 gateway:
  if [ -n "$GATEWAY" ]; then
    if ! /sbin/ip -4 route show | grep -wq default; then
      echo "/etc/rc.d/rc.inet1:  /sbin/ip -4 route add default via ${GATEWAY}" | $LOGGER
      /sbin/ip -4 route add default via ${GATEWAY}
    fi
  fi
  # Bring up the IPv6 gateway:
  if [ -n "$GATEWAY6" ]; then
    if ! /sbin/ip -6 route show | grep -wq default; then
      echo "/etc/rc.d/rc.inet1:  /sbin/ip -6 route add default via ${GATEWAY6}" | $LOGGER
      /sbin/ip -6 route add default via ${GATEWAY6}
    fi
  fi
}

# Function to take down an existing default gateway:
gateway_down() {
  if /sbin/ip -4 route show | grep -wq default ; then
    echo "/etc/rc.d/rc.inet1:  /sbin/ip -4 route del default" | $LOGGER
    /sbin/ip -4 route del default
  fi
  if /sbin/ip -6 route show | grep -wq default ; then
    echo "/etc/rc.d/rc.inet1:  /sbin/ip -6 route del default" | $LOGGER
    /sbin/ip -6 route del default
  fi
}

# Function to start the network:
start() {
  lo_up
  virtif_create
  for i in "${IFNAME[@]}" ; do
    if_up $i
  done
  gateway_up
}

# Function to stop the network:
stop() {
  gateway_down
  for i in "${IFNAME[@]}" ; do
    if_down $i
  done
  virtif_destroy
  lo_down
}


############
### MAIN ###
############

case "$1" in
start|up) # "start" (or "up") brings up all configured interfaces:
  start
  ;;
stop|down) # "stop" (or "down") takes down all configured interfaces:
  stop
  ;;
restart) # "restart" restarts the network:
  stop
  start
  ;;
lo_start|lo_up) # Start the loopback interface:
  lo_up
  ;;
lo_stop|lo_down) # Stop the loopback interface:
  lo_down
  ;;
*_start|*_up) # Example: "eth1_start" (or "eth1_up") will start the specified interface 'eth1'
  INTERFACE=$(echo $1 | /bin/cut -d '_' -f 1)
  if_up $INTERFACE
  gateway_up
  ;;
*_stop|*_down) # Example: "eth0_stop" (or "eth0_down") will stop the specified interface 'eth0'
  INTERFACE=$(echo $1 | /bin/cut -d '_' -f 1)
  if_down $INTERFACE
  ;;
*_restart) # Example: "wlan0_restart" will take 'wlan0' down and up again
  INTERFACE=$(echo $1 | /bin/cut -d '_' -f 1)
  if_down $INTERFACE
  sleep 1
  if_up $INTERFACE
  gateway_up
  ;;
*) # The default is to bring up all configured interfaces:
  start
esac

# End of /etc/rc.d/rc.inet1