Add README.IPv6

Signed-off-by: Robby Workman <rworkman@slackware.com>

1 files changed, 14 insertions, 9 deletions

diff --git a/rc.inet1 b/rc.inet1
index a16c047..9eb5655 100644
--- a/rc.inet1
+++ b/rc.inet1
@@ -187,10 +187,11 @@ if_up() {
       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/$1/autoconf
-        # Disable Router Advertisment for this interface until it's needed:
         if [ "${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/$1/accept_ra
         fi
       fi
@@ -214,13 +215,16 @@ if_up() {
         [ "${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 "Polling for DHCP server on interface ${1}:"
+        echo "${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[@]}" ${1}; then
-          # Enable accepting of RA packets if explicitly told to.
+          # Enable accepting of RA packets if explicitly told to:
           if [ -e /proc/sys/net/ipv6 ] && [ "${USE_RA[$i]}" = "yes" ]; then
             echo "1" >/proc/sys/net/ipv6/conf/$1/accept_ra
           fi
@@ -232,24 +236,25 @@ if_up() {
         fi
       fi
       if [ -e /proc/sys/net/ipv6 ] && [ "${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}" | $LOGGER
-        # Enable accepting of RA packets, unless explicitly configured not to.
+        # Enable accepting of RA packets, unless explicitly configured not to:
         if [ "${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 "Waiting for router announcement on ${1}..."
+        echo "${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 "Timed out!"
+          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
@@ -265,7 +270,7 @@ if_up() {
             /sbin/ip link set dev ${1} up; then
           IF_UP=1
         else
-          echo "/etc/rc.d/rc.inet1:  failed to a set IP ${IPADDR[$i]} for ${1}" | $LOGGER
+          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
@@ -290,7 +295,7 @@ if_up() {
           fi
           IF_UP=1
         else
-          echo "/etc/rc.d/rc.inet1:  failed to a set IP ${IP6ADDR[$i]} for ${1}" | $LOGGER
+          echo "/etc/rc.d/rc.inet1:  failed to set IP ${IP6ADDR[$i]} 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