patchpanel: ndproxy: assign public v6 addr to guest-facing ifs
Currently there is no public IPv6 address assigned on the
guest-facing interfaces (arc bridges and taps) when device is on
IPv6 network. This is causing Linux choosing a wrong src address
on packets directly originated from host to guest and drop the
returning traffic.
This patch generates an EUI-64 address based on virtual interface
MAC address upon receiving an RA, and add it to the interface.
BUG=chromium:1069985
TEST=unit;fuzz
TEST=manual(deploy on octopus and verify pinging penguin from host)
Change-Id: Id3ae953df6b3c84411461294bbc8dbd236cef901
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/2428652
Tested-by: Taoyu Li <taoyl@chromium.org>
Reviewed-by: Garrick Evans <garrick@chromium.org>
Reviewed-by: Hugo Benichi <hugobenichi@google.com>
Commit-Queue: Taoyu Li <taoyl@chromium.org>
diff --git a/patchpanel/net_util.h b/patchpanel/net_util.h
index 50e97ec..1dbe105 100644
--- a/patchpanel/net_util.h
+++ b/patchpanel/net_util.h
@@ -90,6 +90,10 @@
BRILLO_EXPORT bool GenerateRandomIPv6Prefix(struct in6_addr* prefix, int len);
+BRILLO_EXPORT bool GenerateEUI64Address(in6_addr* address,
+ const in6_addr& prefix,
+ const MacAddress& mac);
+
BRILLO_EXPORT void SetSockaddrIn(struct sockaddr* sockaddr, uint32_t addr);
BRILLO_EXPORT std::ostream& operator<<(std::ostream& stream,