From ab79ad14a2d51e95f0ac3cef7cd116a57089ba82 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Maciej=20=C5=BBenczykowski?= Date: Mon, 27 Sep 2010 00:07:02 +0000 Subject: [PATCH] ipv6: Implement Any-IP support for IPv6. MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit AnyIP is the capability to receive packets and establish incoming connections on IPs we have not explicitly configured on the machine. An example use case is to configure a machine to accept all incoming traffic on eth0, and leave the policy of whether traffic for a given IP should be delivered to the machine up to the load balancer. Can be setup as follows: ip -6 rule from all iif eth0 lookup 200 ip -6 route add local default dev lo table 200 (in this case for all IPv6 addresses) Signed-off-by: Maciej Żenczykowski Signed-off-by: David S. Miller --- net/ipv6/route.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 25b0beda4331..25476e7e708b 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -1169,6 +1169,8 @@ int ip6_route_add(struct fib6_config *cfg) if (addr_type & IPV6_ADDR_MULTICAST) rt->dst.input = ip6_mc_input; + else if (cfg->fc_flags & RTF_LOCAL) + rt->dst.input = ip6_input; else rt->dst.input = ip6_forward; @@ -1190,7 +1192,8 @@ int ip6_route_add(struct fib6_config *cfg) they would result in kernel looping; promote them to reject routes */ if ((cfg->fc_flags & RTF_REJECT) || - (dev && (dev->flags&IFF_LOOPBACK) && !(addr_type&IPV6_ADDR_LOOPBACK))) { + (dev && (dev->flags&IFF_LOOPBACK) && !(addr_type&IPV6_ADDR_LOOPBACK) + && !(cfg->fc_flags&RTF_LOCAL))) { /* hold loopback dev/idev if we haven't done so. */ if (dev != net->loopback_dev) { if (dev) { @@ -2082,6 +2085,9 @@ static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh, if (rtm->rtm_type == RTN_UNREACHABLE) cfg->fc_flags |= RTF_REJECT; + if (rtm->rtm_type == RTN_LOCAL) + cfg->fc_flags |= RTF_LOCAL; + cfg->fc_nlinfo.pid = NETLINK_CB(skb).pid; cfg->fc_nlinfo.nlh = nlh; cfg->fc_nlinfo.nl_net = sock_net(skb->sk); @@ -2202,6 +2208,8 @@ static int rt6_fill_node(struct net *net, NLA_PUT_U32(skb, RTA_TABLE, table); if (rt->rt6i_flags&RTF_REJECT) rtm->rtm_type = RTN_UNREACHABLE; + else if (rt->rt6i_flags&RTF_LOCAL) + rtm->rtm_type = RTN_LOCAL; else if (rt->rt6i_dev && (rt->rt6i_dev->flags&IFF_LOOPBACK)) rtm->rtm_type = RTN_LOCAL; else -- 2.20.1