[FS#3390] IPv6 network stops working after a while
OpenWrt Bugs
openwrt-bugs at lists.openwrt.org
Sat Oct 17 19:31:32 EDT 2020
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A new Flyspray task has been opened. Details are below.
User who did this - Markus Hartung (hartmark)
Attached to Project - OpenWrt/LEDE Project
Summary - IPv6 network stops working after a while
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To -
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - I have a Teltonika RUTX11 mobile internet router. It's having issues that makes my router to loose IPv6 connectivity after a while.
root at Teltonika-RUTX11:~# ping6 ftp.sunet.se
PING ftp.sunet.se (2001:6b0:19::165): 56 data bytes
ping6: sendto: Permission denied
If I kill the odhcp6c process it will spawn a new process and IPv6 connectivity is restored for a while but in like 1-3 days It's diving again.
I have logged a task at Teltonika but they haven't been able to pinpoint where the issue is. I have tried starting the process with -v but it seems to not be able to give any more details in the logs.
The process is started with these arguments:
odhcp6c -v -s /lib/netifd/dhcpv6.script -P0 -t120 qmimux0
Is there anything I can do to enable more logging to pinpoint the issue?
The /lib/netifd/dhcpv6.script file is quite massive:
/proc/sys/net/ipv6/conf/$device/hop_limit
[ -n "$RA_MTU" ] && [ "$RA_MTU" -ge 1280 ] && echo "$RA_MTU" > /proc/sys/net/ipv6/conf/$device/mtu 2>/dev/null
[ -n "$RA_REACHABLE" ] && [ "$RA_REACHABLE" -gt 0 ] && echo "$RA_REACHABLE" > /proc/sys/net/ipv6/neigh/$device/base_reachable_time_ms
[ -n "$RA_RETRANSMIT" ] && [ "$RA_RETRANSMIT" -gt 0 ] && echo "$RA_RETRANSMIT" > /proc/sys/net/ipv6/neigh/$device/retrans_time_ms
proto_init_update "*" 1
# Merge RA-DNS
for radns in $RA_DNS; do
local duplicate=0
for dns in $RDNSS; do
[ "$radns" = "$dns" ] && duplicate=1
done
[ "$duplicate" = 0 ] && RDNSS="$RDNSS $radns"
done
for dns in $RDNSS; do
proto_add_dns_server "$dns"
done
for radomain in $RA_DOMAINS; do
local duplicate=0
for domain in $DOMAINS; do
[ "$radomain" = "$domain" ] && duplicate=1
done
[ "$duplicate" = 0 ] && DOMAINS="$DOMAINS $radomain"
done
for domain in $DOMAINS; do
proto_add_dns_search "$domain"
done
for prefix in $PREFIXES; do
proto_add_ipv6_prefix "$prefix"
prefsig="$prefsig ${prefix%%,*}"
local entry="${prefix#*/}"
entry="${entry#*,}"
entry="${entry#*,}"
local valid="${entry%%,*}"
if [ -z "$RA_ADDRESSES" -a -z "$RA_ROUTES" -a \
-z "$RA_DNS" -a "$FAKE_ROUTES" = 1 ]; then
RA_ROUTES="::/0,$SERVER,$valid,4096"
fi
done
for prefix in $USERPREFIX; do
proto_add_ipv6_prefix "$prefix"
done
# Merge addresses
for entry in $RA_ADDRESSES; do
local duplicate=0
local addr="${entry%%/*}"
for dentry in $ADDRESSES; do
local daddr="${dentry%%/*}"
[ "$addr" = "$daddr" ] && duplicate=1
done
[ "$duplicate" = "0" ] && ADDRESSES="$ADDRESSES $entry"
done
for entry in $ADDRESSES; do
local addr="${entry%%/*}"
entry="${entry#*/}"
local mask="${entry%%,*}"
entry="${entry#*,}"
local preferred="${entry%%,*}"
entry="${entry#*,}"
local valid="${entry%%,*}"
proto_add_ipv6_address "$addr" "$mask" "$preferred" "$valid" 1
addrsig="$addrsig $addr/$mask"
if [ -z "$RA_ADDRESSES" -a -z "$RA_ROUTES" -a \
-z "$RA_DNS" -a "$FAKE_ROUTES" = 1 ]; then
RA_ROUTES="::/0,$SERVER,$valid,4096"
fi
# RFC 7278
if [ "$mask" -eq 64 -a -z "$PREFIXES" -a -n "$EXTENDPREFIX" ]; then
proto_add_ipv6_prefix "$addr/$mask,$preferred,$valid"
local raroutes=""
for route in $RA_ROUTES; do
local prefix="${route%%/*}"
local entry="${route#*/}"
local pmask="${entry%%,*}"
entry="${entry#*,}"
local gw="${entry%%,*}"
[ -z "$gw" -a "$mask" = "$pmask" ] && {
case "$addr" in
"${prefix%*::}"*) continue;;
esac
}
raroutes="$raroutes $route"
done
RA_ROUTES="$raroutes"
fi
done
for entry in $RA_ROUTES; do
local duplicate=$NOSOURCEFILTER
local addr="${entry%%/*}"
entry="${entry#*/}"
local mask="${entry%%,*}"
entry="${entry#*,}"
local gw="${entry%%,*}"
entry="${entry#*,}"
local valid="${entry%%,*}"
entry="${entry#*,}"
local metric="${entry%%,*}"
for xentry in $RA_ROUTES; do
local xprefix="${xentry%%,*}"
xentry="${xentry#*,}"
local xgw="${xentry%%,*}"
[ -n "$gw" -a -z "$xgw" -a "$addr/$mask" = "$xprefix" ] && duplicate=1
done
if [ -z "$gw" -o "$duplicate" = 1 ]; then
proto_add_ipv6_route "$addr" "$mask" "$gw" "$metric" "$valid"
else
for prefix in $PREFIXES $ADDRESSES; do
local paddr="${prefix%%,*}"
proto_add_ipv6_route "$addr" "$mask" "$gw" "$metric" "$valid" "$paddr"
done
fi
done
proto_add_data
[ -n "$CER" ] && json_add_string cer "$CER"
[ -n "$PASSTHRU" ] && json_add_string passthru "$PASSTHRU"
[ -n "$ZONE" ] && json_add_string zone "$ZONE"
proto_close_data
proto_send_update "$INTERFACE"
MAPTYPE=""
MAPRULE=""
if [ -n "$MAPE" -a -f /lib/netifd/proto/map.sh ]; then
MAPTYPE="map-e"
MAPRULE="$MAPE"
elif [ -n "$MAPT" -a -f /lib/netifd/proto/map.sh -a -f /proc/net/nat46/control ]; then
MAPTYPE="map-t"
MAPRULE="$MAPT"
elif [ -n "$LW4O6" -a -f /lib/netifd/proto/map.sh ]; then
MAPTYPE="lw4o6"
MAPRULE="$LW4O6"
fi
[ -n "$ZONE" ] || ZONE=$(fw3 -q network $INTERFACE 2>/dev/null)
if [ "$IFACE_MAP" != 0 -a -n "$MAPTYPE" -a -n "$MAPRULE" ]; then
[ -z "$IFACE_MAP" -o "$IFACE_MAP" = 1 ] && IFACE_MAP=${INTERFACE}_4
json_init
json_add_string name "$IFACE_MAP"
json_add_string ifname "@$INTERFACE"
json_add_string proto map
json_add_string type "$MAPTYPE"
json_add_string _prefsig "$prefsig"
[ "$MAPTYPE" = lw4o6 ] && json_add_string _addrsig "$addrsig"
json_add_string rule "$MAPRULE"
json_add_string tunlink "$INTERFACE"
[ -n "$ZONE_MAP" ] || ZONE_MAP=$ZONE
[ -n "$ZONE_MAP" ] && json_add_string zone "$ZONE_MAP"
[ -n "$ENCAPLIMIT_MAP" ] && json_add_string encaplimit "$ENCAPLIMIT_MAP"
[ -n "$IFACE_MAP_DELEGATE" ] && json_add_boolean delegate "$IFACE_MAP_DELEGATE"
json_close_object
ubus call network add_dynamic "$(json_dump)"
elif [ -n "$AFTR" -a "$IFACE_DSLITE" != 0 -a -f /lib/netifd/proto/dslite.sh ]; then
[ -z "$IFACE_DSLITE" -o "$IFACE_DSLITE" = 1 ] && IFACE_DSLITE=${INTERFACE}_4
json_init
json_add_string name "$IFACE_DSLITE"
json_add_string ifname "@$INTERFACE"
json_add_string proto "dslite"
json_add_string peeraddr "$AFTR"
json_add_string tunlink "$INTERFACE"
[ -n "$ZONE_DSLITE" ] || ZONE_DSLITE=$ZONE
[ -n "$ZONE_DSLITE" ] && json_add_string zone "$ZONE_DSLITE"
[ -n "$ENCAPLIMIT_DSLITE" ] && json_add_string encaplimit "$ENCAPLIMIT_DSLITE"
[ -n "$IFACE_DSLITE_DELEGATE" ] && json_add_boolean delegate "$IFACE_DSLITE_DELEGATE"
json_close_object
ubus call network add_dynamic "$(json_dump)"
elif [ "$IFACE_464XLAT" != 0 -a -f /lib/netifd/proto/464xlat.sh ]; then
[ -z "$IFACE_464XLAT" -o "$IFACE_464XLAT" = 1 ] && IFACE_464XLAT=${INTERFACE}_4
json_init
json_add_string name "$IFACE_464XLAT"
json_add_string ifname "@$INTERFACE"
json_add_string proto "464xlat"
json_add_string tunlink "$INTERFACE"
json_add_string _addrsig "$addrsig"
[ -n "$ZONE_464XLAT" ] || ZONE_464XLAT=$ZONE
[ -n "$ZONE_464XLAT" ] && json_add_string zone "$ZONE_464XLAT"
[ -n "$IFACE_464XLAT_DELEGATE" ] && json_add_boolean delegate "$IFACE_464XLAT_DELEGATE"
json_close_object
ubus call network add_dynamic "$(json_dump)"
fi
# TODO: $SNTP_IP $SIP_IP $SNTP_FQDN $SIP_DOMAIN
}
teardown_interface() {
proto_init_update "*" 0
proto_send_update "$INTERFACE"
}
case "$2" in
bound)
teardown_interface "$1"
setup_interface "$1"
;;
informed|updated|rebound)
setup_interface "$1"
;;
ra-updated)
[ -n "$ADDRESSES$RA_ADDRESSES$PREFIXES$USERPREFIX" ] && setup_interface "$1"
;;
started|stopped|unbound)
teardown_interface "$1"
;;
esac
# user rules
[ -f /etc/odhcp6c.user ] && . /etc/odhcp6c.user "$@"
exit 0
>
More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=3390
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