From 8691d75917d91a39f2011d4ddd0713b8562e5e3a Mon Sep 17 00:00:00 2001 From: Steven Barth Date: Mon, 6 Oct 2014 11:19:33 +0000 Subject: odhcp6c: add route-workaround for broken IPv6-ISPs Some ISP seem to only do stateful DHCPv6 and not sending RAs. This is technically broken because plain DHCPv6 doesn't carry routes. We work around here by faking a default route to the DHCPv6 server if we do not receive a useful RA from the ISP. This workaround can be turned off with: option fakeroutes 0 Signed-off-by: Steven Barth SVN-Revision: 42803 --- package/network/ipv6/odhcp6c/files/dhcpv6.script | 14 ++++++++++++++ package/network/ipv6/odhcp6c/files/dhcpv6.sh | 6 ++++-- 2 files changed, 18 insertions(+), 2 deletions(-) (limited to 'package/network/ipv6/odhcp6c/files') diff --git a/package/network/ipv6/odhcp6c/files/dhcpv6.script b/package/network/ipv6/odhcp6c/files/dhcpv6.script index 5ab9a1eb63..37e67bfe52 100755 --- a/package/network/ipv6/odhcp6c/files/dhcpv6.script +++ b/package/network/ipv6/odhcp6c/files/dhcpv6.script @@ -26,6 +26,15 @@ setup_interface () { for prefix in $PREFIXES; do proto_add_ipv6_prefix "$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 [ -n "$USERPREFIX" ] && proto_add_ipv6_prefix "$USERPREFIX" @@ -51,6 +60,11 @@ setup_interface () { local valid="${entry%%,*}" proto_add_ipv6_address "$addr" "$mask" "$preferred" "$valid" 1 + + if [ -z "$RA_ADDRESSES" -a -z "$RA_ROUTES" -a \ + -z "$RA_DNS" -a "$FAKE_ROUTES" = 1 ]; then + RA_ROUTES="::/0,$SERVER,$valid,4096" + fi done for entry in $RA_ROUTES; do diff --git a/package/network/ipv6/odhcp6c/files/dhcpv6.sh b/package/network/ipv6/odhcp6c/files/dhcpv6.sh index 0690bd15e5..5914abe0bb 100755 --- a/package/network/ipv6/odhcp6c/files/dhcpv6.sh +++ b/package/network/ipv6/odhcp6c/files/dhcpv6.sh @@ -26,14 +26,15 @@ proto_dhcpv6_init_config() { proto_config_add_string "vendorclass" proto_config_add_boolean delegate proto_config_add_int "soltimeout" + proto_config_add_boolean fakeroutes } proto_dhcpv6_setup() { local config="$1" local iface="$2" - local reqaddress reqprefix clientid reqopts noslaaconly forceprefix norelease ip6prefix iface_dslite iface_map ifaceid sourcerouting userclass vendorclass delegate zone_dslite zone_map zone soltimeout - json_get_vars reqaddress reqprefix clientid reqopts noslaaconly forceprefix norelease ip6prefix iface_dslite iface_map ifaceid sourcerouting userclass vendorclass delegate zone_dslite zone_map zone soltimeout + local reqaddress reqprefix clientid reqopts noslaaconly forceprefix norelease ip6prefix iface_dslite iface_map ifaceid sourcerouting userclass vendorclass delegate zone_dslite zone_map zone soltimeout fakeroutes + json_get_vars reqaddress reqprefix clientid reqopts noslaaconly forceprefix norelease ip6prefix iface_dslite iface_map ifaceid sourcerouting userclass vendorclass delegate zone_dslite zone_map zone soltimeout fakeroutes # Configure @@ -72,6 +73,7 @@ proto_dhcpv6_setup() { [ -n "$zone_dslite" ] && proto_export "ZONE_DSLITE=$zone_dslite" [ -n "$zone_map" ] && proto_export "ZONE_MAP=$zone_map" [ -n "$zone" ] && proto_export "ZONE=$zone" + [ "$fakeroutes" != "0" ] && proto_export "FAKE_ROUTES=1" proto_export "INTERFACE=$config" proto_run_command "$config" odhcp6c \ -- cgit v1.2.3