[Cerowrt-devel] cerowrt 3.7.2-3 released, still in a battle with ipv6

Dave Taht dave.taht at gmail.com
Thu Jan 17 16:47:42 EST 2013 

On Thu, Jan 17, 2013 at 1:45 PM, Maciej Soltysiak <maciej at soltysiak.com>wrote:

> Hi, I configured he.net tunnel according to
> http://wiki.openwrt.org/doc/uci/network6 and works with latest 3.7.2-4.
>
> However I don't understand how my client is supposed get an ip6 address.
> radvd is gone and I don't see anything handing out me an ip6 addr. Who's
> job is it now then?
>

dnsmasq is supposed to do the job now, but the configuration via openwrt's
config is in flux. There is documentation floating about on dnsmasq-discuss
as well as inside the the dnsmasq-2.66test10 tarball on how to do it at the
command line....




>
> Maciej
>
> On Wed, Jan 16, 2013 at 10:53 PM, Maciej Soltysiak <maciej at soltysiak.com>wrote:
>
>> Saw this in dmesg too:
>>
>> [  720.030000] ------------[ cut here ]------------
>> [  720.030000] WARNING: at
>> /build/cero2/src/Cerowrt-next/build_dir/target-mips_r2_uClibc-0.9.33.2/linux-ar71xx_generic/compat-wireless-2013-01-07/net/mac80211/chan.c:162
>> __ieee80211_vif_release_channel+0x1d0/0x254 [mac80211]()
>> [  720.050000] Modules linked in: sch_teql sch_tbf sch_sfq sch_red
>> sch_qfq sch_prio sch_ns2_codel sch_nfq_codel sch_netem sch_htb sch_gred
>> sch_efq_codel sch_dsmark em_text em_nbyte em_meta em_cmp cls_basic
>> act_police act_ipt act_connmark act_skbedit act_mirred em_u32 cls_u32
>> cls_tcindex cls_flow cls_route cls_fw sch_hfsc sch_fq_codel sch_codel
>> sch_ingress usb_storage ath79_wdt ohci_hcd xt_hashlimit xt_set(O)
>> ip_set_list_set(O) ip_set_hash_netport(O) ip_set_hash_netiface(O)
>> ip_set_hash_net(O) ip_set_hash_ipportnet(O) ip_set_hash_ipportip(O)
>> ip_set_hash_ipport(O) ip_set_hash_ip(O) ip_set_bitmap_port(O)
>> ip_set_bitmap_ipmac(O) ip_set_bitmap_ip(O) ip_set(O) ip6t_REJECT ip6t_rt
>> ip6t_hbh ip6t_mh ip6t_ipv6header ip6t_frag ip6t_eui64 ip6t_ah ip6table_raw
>> ip6table_mangle ip6table_filter ip6_tables nf_conntrack_ipv6 nf_defrag_ipv6
>> nfnetlink nf_nat_irc nf_nat_ftp nf_conntrack_irc nf_conntrack_ftp xt_policy
>> xt_esp ipt_ah xt_HL xt_hl xt_ecn ipt_ECN xt_CLASSIFY xt_time xt_tcpmss
>> xt_statistic xt_mark xt_length xt_DSCP xt_dscp xt_string xt_layer7 xt_quota
>> xt_pkttype xt_physdev xt_owner xt_addrtype ipt_MASQUERADE iptable_nat
>> xt_nat nf_nat_ipv4 nf_nat xt_recent xt_helper xt_connmark xt_connbytes pptp
>> pppoe xt_conntrack xt_CT iptable_raw xt_state nf_conntrack_ipv4
>> nf_defrag_ipv4 nf_conntrack ehci_hcd sd_mod pppox ipt_REJECT xt_TCPMSS
>> xt_LOG xt_comment xt_multiport xt_mac xt_limit iptable_mangle
>> iptable_filter ip_tables xt_tcpudp x_tables ip_gre gre ifb sit ipcomp
>> xfrm4_tunnel xfrm4_mode_tunnel xfrm4_mode_transport xfrm4_mode_beet esp4
>> ah4 tunnel4 tun tcp_ledbat(O) ppp_async ppp_generic slhc af_key xfrm_user
>> xfrm_ipcomp xfrm_algo vfat fat ext4 jbd2 mbcache autofs4 button_hotplug(O)
>> ath9k(O) ath9k_common(O) ath9k_hw(O) ath(O) nls_utf8 nls_iso8859_2
>> nls_iso8859_15 nls_iso8859_13 nls_iso8859_1 nls_cp437 mac80211(O) usbcore
>> usb_common scsi_mod nls_base ts_fsm ts_bm ts_kmp crc16 crc_ccitt ipv6
>> input_polldev cfg80211(O) compat(O) input_core sha1_generic md5 hmac
>> des_generic deflate cbc authenc arc4 zlib_inflate zlib_deflate
>> ledtrig_timer ledtrig_default_on leds_gpio gpio_button_hotplug(O)
>> [  720.230000] Call Trace:
>> [  720.240000] [<802a31c4>] dump_stack+0x8/0x34
>> [  720.240000] [<80071e34>] warn_slowpath_common+0x78/0xa4
>> [  720.250000] [<80071e78>] warn_slowpath_null+0x18/0x24
>> [  720.250000] [<86d24f6c>] __ieee80211_vif_release_channel+0x1d0/0x254
>> [mac80211]
>> [  720.260000] [<86d253c0>] ieee80211_vif_release_channel+0x4c/0x64
>> [mac80211]
>> [  720.270000] [<86d14c8c>] ieee80211_stop_ap+0x194/0x1bc [mac80211]
>> [  720.270000] [<86c1c50c>] cfg80211_stop_ap+0x78/0xbc [cfg80211]
>> [  720.280000] [<8022c1ac>] genl_rcv_msg+0x1ec/0x234
>> [  720.280000] [<8022b57c>] netlink_rcv_skb+0x6c/0xe4
>> [  720.290000] [<8022bfb0>] genl_rcv+0x24/0x34
>> [  720.290000] [<8022aeb0>] netlink_unicast+0x164/0x248
>> [  720.300000] [<8022b334>] netlink_sendmsg+0x2c4/0x350
>> [  720.300000] [<801f7064>] sock_sendmsg+0x80/0xb0
>> [  720.310000] [<801f733c>] __sys_sendmsg+0x1a0/0x240
>> [  720.310000] [<801f91b8>] sys_sendmsg+0x48/0x7c
>> [  720.320000] [<8006a064>] stack_done+0x20/0x40
>> [  720.320000]
>> [  720.320000] ---[ end trace 38fe65d6c26f72f3 ]---
>> Does it look like something new or already seen?
>>
>> On Wed, Jan 16, 2013 at 10:48 PM, Dave Taht <dave.taht at gmail.com> wrote:
>>
>>> At least one (possibly not new) unaligned exception trap has reared its
>>> head in addrconf_prefix_rcv.
>>>
>>> https://www.bufferbloat.net/issues/419
>>>
>>> This is a bad place for one! a network burp heisenbug....
>>>
>>> On Wed, Jan 16, 2013 at 4:12 PM, Maciej Soltysiak <maciej at soltysiak.com>wrote:
>>>
>>>> Good build! I have to report that the issue with polipo, DNS and TFO
>>>> that I observed with 3.7.1-1 seems resolved.
>>>> Test with and without TFO.
>>>> Ketan, I won't post a bug unless it appears again.
>>>>
>>>
>>> What I saw (Ages ago) was that dns would stop working over time in
>>> polipo.
>>>
>>>
>>>>
>>>> Regards.
>>>> Maciej
>>>> On Wed, Jan 16, 2013 at 12:37 PM, Dave Taht <dave.taht at gmail.com>wrote:
>>>>
>>>>> It's at:
>>>>>
>>>>> http://snapon.lab.bufferbloat.net/~cero2/cerowrt/wndr/3.7.2-3/
>>>>>
>>>>> It seems pretty stable but with the ipv6 churn...
>>>>>
>>>>> [insert my std hyperbolic warnings about exposing the release to
>>>>> default gws in front of spouses or young children]
>>>>>
>>>>> features:
>>>>>
>>>>> + dnsmasq 2.66test10
>>>>> + merge with openwrt head
>>>>> + new unaligned access code from openwrt head (by nbd) and the
>>>>> remainder of the older unaligned patch set (by robert bradley) ported
>>>>> to work on top of that
>>>>>
>>>>> I have not checked to see if all traps are gone, you can look at that
>>>>> via
>>>>> files in /sys/debug/kernel/mips/
>>>>>
>>>>>  - it's mostly the ipv6 related traps I'm concerned about...
>>>>>
>>>>> The checksum routine changed and I did check checksums on a variety of
>>>>> ipv4 ethernet traffic, but not enough to feel assured.
>>>>>
>>>>> + Bug fixed https://www.bufferbloat.net/issues/418
>>>>>
>>>>> BUG_ON removed on TFO support in the kernel. TFO works. I tested it by:
>>>>>
>>>>> echo 3 > /proc/sys/net/ipv4/tcp_fastopen
>>>>> editing /etc/init.d/polipo to add support for a boolean useTCPFastOpen
>>>>> parameter
>>>>> adding that parameter to /etc/config/polipo
>>>>> testing with the current version of httping
>>>>>
>>>>> I will update the init script and config in the next spin.
>>>>>
>>>>> ...
>>>>>
>>>>> The churn in how to setup ipv6 sanely continues. The configuration for
>>>>> how to do it has changed significantly again and is documented at:
>>>>>
>>>>> http://wiki.openwrt.org/doc/uci/network6
>>>>>
>>>>> It's not clear to me to state of the ipv6 dnsmasq integration now.
>>>>> There is much discussion on the dnsmasq-discuss list as to how to do
>>>>> prefix-independent configuration as one example.
>>>>>
>>>>> as for the ipv6 related changes just now come down from openwrt,
>>>>> steven barth tells me that:
>>>>>
>>>>> "6distributed functionality (prefix delegation) was merged into netifd
>>>>> for size reasons.
>>>>> The shell mess which was ipv6-support was abandoned.
>>>>>
>>>>> dhcpv6 is now a regular network proto in netifd (which can be added
>>>>> ontop of other ipv4-wan types or separately for ipv6-only).
>>>>>
>>>>> network6 is unnecessary now. 6rd, 6to4 now automatically publish their
>>>>> prefix. 6in4 adds a new option ip6prefix for adding the routed prefix.
>>>>>
>>>>> LANs / WLANs which want a prefix now just add a option ip6assign 64 to
>>>>> the interface definition.
>>>>>
>>>>> See examples in: http://wiki.openwrt.org/doc/uci/network6
>>>>>
>>>>> Prefix Announcement / DHCPv6 / Relaying has been untangled and should
>>>>> be moved into the respective daemon config / init. I've done this for
>>>>> 6relayd.
>>>>>
>>>>> For dnsmasq you will have to add config support similar to what is
>>>>> done for DHCP in IPv4, so it should be easy to adapt. Maybe some of
>>>>> the CeroWrt contributors like to add that.
>>>>>
>>>>> I also haven't looked at NPT yet. I've removed the shell-script mess
>>>>> for now as we will not have all targets up to 3.7 in the coming weeks
>>>>> and therefore also not a new ip6tables."
>>>>>
>>>>> AHCP is still lost and lonely in the configuration.
>>>>>
>>>>> I took a stab at enabling ipv6 NPT support myself in this release, but
>>>>> the changes I'd made to the openwrt configuration didn't successfully
>>>>> get the modules to compile nor create a package. My *non-working
>>>>> patch* looked like this, and suggestions as to what sort of magic wand
>>>>> to wave over it welcomed.
>>>>>
>>>>> diff --git a/include/netfilter.mk b/include/netfilter.mk
>>>>> index 1d89e6d..3d65f76 100644
>>>>> --- a/include/netfilter.mk
>>>>> +++ b/include/netfilter.mk
>>>>> @@ -154,10 +154,14 @@ $(eval $(call
>>>>> nf_add,IPT_IPV6,CONFIG_IP6_NF_MATCH_RT, $(P_V6)ip6t_rt))
>>>>>
>>>>>  $(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_TARGET_LOG,
>>>>> $(P_V6)ip6t_LOG))
>>>>>  $(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_TARGET_REJECT,
>>>>> $(P_V6)ip6t_REJECT))
>>>>> +$(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_NAT, $(P_V6)nf_nat_ipv6))
>>>>> +$(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_TARGET_MASQUERADE,
>>>>> $(P_V6)ip6t_MASQUERADE))
>>>>> +$(eval $(call nf_add,IPT_IPv6,CONFIG_IP6_NF_TARGET_NPT,
>>>>> $(P_V6)ip6t_NPT))
>>>>>
>>>>>  # nat
>>>>>
>>>>>  # kernel only
>>>>> +$(eval $(if $(NF_KMOD),$(call nf_add,IPT_NAT6,CONFIG_IP6_NF_NAT,
>>>>> $(P_V6)nf_nat_ipv6, ge 3.7.0),))
>>>>>  $(eval $(if $(NF_KMOD),$(call nf_add,IPT_NAT,CONFIG_NF_NAT,
>>>>> $(P_XT)nf_nat $(P_V4)nf_nat_ipv4 $(P_XT)xt_nat $(P_V4)iptable_nat, ge
>>>>> 3.7.0),))
>>>>>  $(eval $(if $(NF_KMOD),$(call nf_add,IPT_NAT,CONFIG_NF_NAT,
>>>>> $(P_V4)nf_nat $(P_V4)iptable_nat, lt 3.7.0),))
>>>>>
>>>>> diff --git a/package/kernel/modules/netfilter.mk
>>>>> b/package/kernel/modules/netfilter.mk
>>>>> index 69bdba0..d862c32 100644
>>>>> --- a/package/kernel/modules/netfilter.mk
>>>>> +++ b/package/kernel/modules/netfilter.mk
>>>>> @@ -164,6 +164,23 @@ endef
>>>>>
>>>>>  $(eval $(call KernelPackage,ipt-nat))
>>>>>
>>>>> +define KernelPackage/ipt-nat6
>>>>> +  TITLE:=Basic NAT targets for IPv6
>>>>> +  KCONFIG:=$(KCONFIG_IPT_NAT6)
>>>>> +  FILES:=$(foreach mod,$(IPT_NAT6-m),$(LINUX_DIR)/net/$(mod).ko)
>>>>> +  AUTOLOAD:=$(call AutoLoad,42,$(notdir $(IPT_NAT6-m)))
>>>>> +  $(call AddDepends/ipt)
>>>>> +endef
>>>>> +
>>>>> +define KernelPackage/ipt-nat6/description
>>>>> + Netfilter (IPv6) kernel modules for basic NAT targets
>>>>> + Includes:
>>>>> + - MASQUERADE
>>>>> + - NPT
>>>>> +endef
>>>>> +
>>>>> +$(eval $(call KernelPackage,ipt-nat6))
>>>>> +
>>>>>
>>>>>  define KernelPackage/ipt-nat-extra
>>>>>    TITLE:=Extra NAT targets
>>>>>
>>>>>
>>>>> --
>>>>> Dave Täht
>>>>>
>>>>> Fixing bufferbloat with cerowrt:
>>>>> http://www.teklibre.com/cerowrt/subscribe.html
>>>>> _______________________________________________
>>>>> Cerowrt-devel mailing list
>>>>> Cerowrt-devel at lists.bufferbloat.net
>>>>> https://lists.bufferbloat.net/listinfo/cerowrt-devel
>>>>>
>>>>
>>>>
>>>
>>>
>>> --
>>> Dave Täht
>>>
>>> Fixing bufferbloat with cerowrt:
>>> http://www.teklibre.com/cerowrt/subscribe.html
>>>
>>
>>
>


-- 
Dave Täht

Fixing bufferbloat with cerowrt:
http://www.teklibre.com/cerowrt/subscribe.html
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