From f0e2acfa30920fc9b902734baba71e58f2fd844a Mon Sep 17 00:00:00 2001 From: Nicolas Dichtel Date: Thu, 14 Nov 2013 13:51:06 +0100 Subject: [PATCH] sit: link local routes are missing When a link local address was added to a sit interface, the corresponding route was not configured. This breaks routing protocols that use the link local address, like OSPFv3. To ease the code reading, I remove sit_route_add(), which only adds v4 mapped routes, and add this kind of route directly in sit_add_v4_addrs(). Thus link local and v4 mapped routes are configured in the same place. Reported-by: Li Hongjun Signed-off-by: Nicolas Dichtel Signed-off-by: David S. Miller --- net/ipv6/addrconf.c | 24 +++++------------------- 1 file changed, 5 insertions(+), 19 deletions(-) diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 27fedc3..5969ca1 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -1982,23 +1982,6 @@ static void addrconf_add_mroute(struct net_device *dev) ip6_route_add(&cfg); } -#if IS_ENABLED(CONFIG_IPV6_SIT) -static void sit_route_add(struct net_device *dev) -{ - struct fib6_config cfg = { - .fc_table = RT6_TABLE_MAIN, - .fc_metric = IP6_RT_PRIO_ADDRCONF, - .fc_ifindex = dev->ifindex, - .fc_dst_len = 96, - .fc_flags = RTF_UP | RTF_NONEXTHOP, - .fc_nlinfo.nl_net = dev_net(dev), - }; - - /* prefix length - 96 bits "::d.d.d.d" */ - ip6_route_add(&cfg); -} -#endif - static struct inet6_dev *addrconf_add_dev(struct net_device *dev) { struct inet6_dev *idev; @@ -2529,6 +2512,7 @@ static void sit_add_v4_addrs(struct inet6_dev *idev) struct net_device *dev; struct net *net = dev_net(idev->dev); int scope, plen; + u32 pflags = 0; ASSERT_RTNL(); @@ -2542,10 +2526,12 @@ static void sit_add_v4_addrs(struct inet6_dev *idev) } else { scope = IPV6_ADDR_COMPATv4; plen = 96; + pflags |= RTF_NONEXTHOP; } if (addr.s6_addr32[3]) { add_addr(idev, &addr, plen, scope); + addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags); return; } @@ -2569,6 +2555,8 @@ static void sit_add_v4_addrs(struct inet6_dev *idev) } add_addr(idev, &addr, plen, flag); + addrconf_prefix_route(&addr, plen, idev->dev, 0, + pflags); } } } @@ -2704,8 +2692,6 @@ static void addrconf_sit_config(struct net_device *dev) if (dev->flags&IFF_POINTOPOINT) addrconf_add_mroute(dev); - else - sit_route_add(dev); } #endif -- 2.7.4