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Re-enable arbitrary IPv6 addresses as outer ip4-in-ip6 tunnel source address

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The 666-Add-support-for-MAP-E-FMRs-mesh-mode.patch kernel patches
break the possibility for using an ip4ip6 tunnel interface as a fall
back interface accepting ip4-in-ip6 tunneled packets from any remote
address. This works out of the box with any normal (non-666-patched)
kernel and can be configured by setting up an 'ip -6 tunnel' with type
'any' or 'ip4ip6' and a remote address of '::'.

The misbehavior comes with line 290 the patch which discards all packets
that do not show the expected saddr, even if no single fmr rule was
defined and despite the validity of the saddr was already approved earlier.

Signed-off-by: Axel Neumann <neumann@cgws.de>
Acked-by: Hans Dedecker <dedeckeh@gmail.com>
(cherry picked from 65c05301c2)
This commit is contained in:
Axel Neumann 2018-05-21 20:32:09 +02:00 committed by Daniel Golle
parent d700eb187b
commit f7668334a8
4 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
target/linux/generic/pending-3.18/666-Add-support-for-MAP-E-FMRs-mesh-mode.patch
View File

@ -258,7 +258,7 @@ Signed-off-by: Steven Barth <cyrus@openwrt.org>
skb_reset_network_header(skb); skb_reset_network_header(skb);
skb->protocol = htons(protocol); skb->protocol = htons(protocol);
memset(skb->cb, 0, sizeof(struct inet6_skb_parm)); memset(skb->cb, 0, sizeof(struct inet6_skb_parm));
+ if (protocol == ETH_P_IP && + if (protocol == ETH_P_IP && t->parms.fmrs &&
+ !ipv6_addr_equal(&ipv6h->saddr, &t->parms.raddr)) { + !ipv6_addr_equal(&ipv6h->saddr, &t->parms.raddr)) {
+ /* Packet didn't come from BR, so lookup FMR */ + /* Packet didn't come from BR, so lookup FMR */
+ struct __ip6_tnl_fmr *fmr; + struct __ip6_tnl_fmr *fmr;

2
target/linux/generic/pending-4.14/666-Add-support-for-MAP-E-FMRs-mesh-mode.patch
View File

@ -268,7 +268,7 @@ Signed-off-by: Steven Barth <cyrus@openwrt.org>
skb_reset_network_header(skb); skb_reset_network_header(skb);
memset(skb->cb, 0, sizeof(struct inet6_skb_parm)); memset(skb->cb, 0, sizeof(struct inet6_skb_parm));
+ if (tpi->proto == htons(ETH_P_IP) && + if (tpi->proto == htons(ETH_P_IP) && tunnel->parms.fmrs &&
+ !ipv6_addr_equal(&ipv6h->saddr, &tunnel->parms.raddr)) { + !ipv6_addr_equal(&ipv6h->saddr, &tunnel->parms.raddr)) {
+ /* Packet didn't come from BR, so lookup FMR */ + /* Packet didn't come from BR, so lookup FMR */
+ struct __ip6_tnl_fmr *fmr; + struct __ip6_tnl_fmr *fmr;

2
target/linux/generic/pending-4.4/666-Add-support-for-MAP-E-FMRs-mesh-mode.patch
View File

@ -273,7 +273,7 @@ Signed-off-by: Steven Barth <cyrus@openwrt.org>
skb_reset_network_header(skb); skb_reset_network_header(skb);
skb->protocol = htons(protocol); skb->protocol = htons(protocol);
memset(skb->cb, 0, sizeof(struct inet6_skb_parm)); memset(skb->cb, 0, sizeof(struct inet6_skb_parm));
+ if (protocol == ETH_P_IP && + if (protocol == ETH_P_IP && t->parms.fmrs &&
+ !ipv6_addr_equal(&ipv6h->saddr, &t->parms.raddr)) { + !ipv6_addr_equal(&ipv6h->saddr, &t->parms.raddr)) {
+ /* Packet didn't come from BR, so lookup FMR */ + /* Packet didn't come from BR, so lookup FMR */
+ struct __ip6_tnl_fmr *fmr; + struct __ip6_tnl_fmr *fmr;

2
target/linux/generic/pending-4.9/666-Add-support-for-MAP-E-FMRs-mesh-mode.patch
View File

@ -268,7 +268,7 @@ Signed-off-by: Steven Barth <cyrus@openwrt.org>
skb_reset_network_header(skb); skb_reset_network_header(skb);
memset(skb->cb, 0, sizeof(struct inet6_skb_parm)); memset(skb->cb, 0, sizeof(struct inet6_skb_parm));
+ if (tpi->proto == htons(ETH_P_IP) && + if (tpi->proto == htons(ETH_P_IP) && tunnel->parms.fmrs &&
+ !ipv6_addr_equal(&ipv6h->saddr, &tunnel->parms.raddr)) { + !ipv6_addr_equal(&ipv6h->saddr, &tunnel->parms.raddr)) {
+ /* Packet didn't come from BR, so lookup FMR */ + /* Packet didn't come from BR, so lookup FMR */
+ struct __ip6_tnl_fmr *fmr; + struct __ip6_tnl_fmr *fmr;