summaryrefslogtreecommitdiffstats
path: root/rc.inet1
diff options
context:
space:
mode:
Diffstat (limited to 'rc.inet1')
-rw-r--r--rc.inet150
1 files changed, 30 insertions, 20 deletions
diff --git a/rc.inet1 b/rc.inet1
index 971d045..6668c44 100644
--- a/rc.inet1
+++ b/rc.inet1
@@ -62,8 +62,9 @@ for i in "${IFNAME[@]}"; do
fi
fi
done
-# Normally the ipv6 module would be automatically loaded when the first IP is assigned to an interface,
-# but autoconf/accept_ra need to be set to 0 before that happens, so pre-load ipv6 here.
+# 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
fi
@@ -181,20 +182,26 @@ if_up() {
if [ -x /etc/rc.d/rc.wireless ]; then
. /etc/rc.d/rc.wireless ${1} start
fi
- # Disable v6 IP auto configuration before trying to bring up the interface:
- echo "0" >/proc/sys/net/ipv6/conf/$1/autoconf
- # Disable Router Advertisment for this interface until it's needed:
- echo "0" >/proc/sys/net/ipv6/conf/$1/accept_ra
- IF_UP=0
+ 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
+ # Disable Router Advertisment for this interface until it's needed:
+ echo "0" >/proc/sys/net/ipv6/conf/$1/accept_ra
+ fi
+ local IF_UP=0
# Slackware historically favours dynamic configuration over fixed IP to configure interfaces, so keep that tradition:
- if [ "${USE_DHCP[$i]}" = "yes" ] || [ "${USE_DHCP6[$i]}" = "yes" ]; then # use dhcpcd to bring interface up
+ if [ "${USE_DHCP[$i]}" = "yes" ] || { [ -e /proc/sys/net/ipv6 ] && [ "${USE_DHCP6[$i]}" = "yes" ]; }; then # use dhcpcd
# Declare DHCP_OPTIONS array before adding new options to it:
declare -a DHCP_OPTIONS=()
# Set DHCP_OPTIONS for this interface:
- if [ "${USE_DHCP[$i]}" = "yes" ] && [ "${USE_DHCP6[$i]}" != "yes" ]; then # only try v4 dhcp
+ if [ -e /proc/sys/net/ipv6 ]; then
+ if [ "${USE_DHCP[$i]}" = "yes" ] && [ "${USE_DHCP6[$i]}" != "yes" ]; then # only try v4 dhcp
+ DHCP_OPTIONS+=("-4")
+ elif [ "${USE_DHCP[$i]}" != "yes" ] && [ "${USE_DHCP6[$i]}" = "yes" ]; then # only try v6 dhcp
+ DHCP_OPTIONS+=("-6")
+ fi
+ else
DHCP_OPTIONS+=("-4")
- elif [ "${USE_DHCP[$i]}" != "yes" ] && [ "${USE_DHCP6[$i]}" = "yes" ]; then # only try v6 dhcp
- DHCP_OPTIONS+=("-6")
fi
[ -n "${DHCP_HOSTNAME[$i]}" ] && DHCP_OPTIONS+=("-h" "${DHCP_HOSTNAME[$i]}")
[ "${DHCP_KEEPRESOLV[$i]}" = "yes" ] && DHCP_OPTIONS+=("-C" "resolv.conf")
@@ -216,7 +223,7 @@ if_up() {
/sbin/ip link set dev ${1} down
fi
fi
- if [ "${USE_DHCP6[$i]}" != "yes" ] && [ "${USE_SLAAC[$i]}" = "yes" ]; then # configure interface via stateless auto config
+ if [ -e /proc/sys/net/ipv6 ] && [ "${USE_DHCP6[$i]}" != "yes" ] && [ "${USE_SLAAC[$i]}" = "yes" ]; then # configure via SLAAC
echo "/etc/rc.d/rc.inet1: using Router Advertisement stateless auto configuration for ${1}" | $LOGGER
# Enable accepting of router advertisment packets, and auto configuration of interfaces:
echo "1" >/proc/sys/net/ipv6/conf/$1/accept_ra
@@ -236,11 +243,6 @@ if_up() {
fi
fi
if [ "${USE_DHCP[$i]}" != "yes" ] && [ -n "${IPADDR[$i]}" ]; then # add a fixed v4 IP to the interface
- # 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/$1/accept_dad
if [ -z "${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"
@@ -255,7 +257,13 @@ if_up() {
/sbin/ip link set dev ${1} down
fi
fi
- if [ "${USE_DHCP6[$i]}" != "yes" ] && [ "${USE_SLAAC[$i]}" != "yes" ] && [ -n "${IP6ADDR[$i]}" ]; then # add a fixed v6 IP
+ if [ -e /proc/sys/net/ipv6 ] && [ "${USE_DHCP6[$i]}" != "yes" ] && [ "${USE_SLAAC[$i]}" != "yes" ] && \
+ [ -n "${IP6ADDR[$i]}" ]; then # add a fixed v6 IP
+ # 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/$1/accept_dad
if [ -z "${PREFIXLEN[$i]}" ]; then
echo "/etc/rc.d/rc.inet1: no PREFIXLEN set for ${1} - assuming 64" | $LOGGER
PREFIXLEN[$i]="64"
@@ -288,7 +296,7 @@ if_up() {
fi
done
fi
- if [ -n "${IP6ALIASES[$i]}" ]; then
+ if [ -e /proc/sys/net/ipv6 ] && [ -n "${IP6ALIASES[$i]}" ]; then
# 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
@@ -315,7 +323,9 @@ if_up() {
/sbin/ip link set dev ${1} promisc on
fi
# Reset accept_dad back to default now all the IPs are configured:
- cat /proc/sys/net/ipv6/conf/default/accept_dad >/proc/sys/net/ipv6/conf/$1/accept_dad
+ 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"