From 90854d289fefbb5575391bfb8e493cf69f6a5804 Mon Sep 17 00:00:00 2001 From: Tobias Brunner Date: Fri, 20 Jun 2014 08:51:07 +0200 Subject: [PATCH] kernel-netlink: Install virtual IPv6 addresses as deprecated This should prevent the kernel's IPv6 source address selection algorithm from using this address unless it is forced to by our source route. This is helpful if split tunneling is used. Fixes #598. --- src/libhydra/plugins/kernel_netlink/kernel_netlink_net.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/src/libhydra/plugins/kernel_netlink/kernel_netlink_net.c b/src/libhydra/plugins/kernel_netlink/kernel_netlink_net.c index bb19418..650a655 100644 --- a/src/libhydra/plugins/kernel_netlink/kernel_netlink_net.c +++ b/src/libhydra/plugins/kernel_netlink/kernel_netlink_net.c @@ -1868,6 +1868,17 @@ static status_t manage_ipaddr(private_kernel_netlink_net_t *this, int nlmsg_type netlink_add_attribute(hdr, IFA_LOCAL, chunk, sizeof(request)); + if (ip->get_family(ip) == AF_INET6 && this->rta_prefsrc_for_ipv6) + { /* if source routes are possible we let the virtual IP get deprecated + * immediately (but mark it as valid forever) so it gets only used if + * forced by our route, and not by the default IPv6 address selection */ + struct ifa_cacheinfo cache = { + .ifa_valid = 0xFFFFFFFF, + .ifa_prefered = 0, + }; + netlink_add_attribute(hdr, IFA_CACHEINFO, chunk_from_thing(cache), + sizeof(request)); + } return this->socket->send_ack(this->socket, hdr); } -- 2.7.4