diff options
Diffstat (limited to 'net/ipv6/route.c')
-rw-r--r-- | net/ipv6/route.c | 72 |
1 files changed, 69 insertions, 3 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 843406f14d7..af26cc1073c 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -1325,6 +1325,16 @@ int ip6_route_add(struct fib6_config *cfg) if (dev == NULL) goto out; + if (!ipv6_addr_any(&cfg->fc_prefsrc)) { + if (!ipv6_chk_addr(net, &cfg->fc_prefsrc, dev, 0)) { + err = -EINVAL; + goto out; + } + ipv6_addr_copy(&rt->rt6i_prefsrc.addr, &cfg->fc_prefsrc); + rt->rt6i_prefsrc.plen = 128; + } else + rt->rt6i_prefsrc.plen = 0; + if (cfg->fc_flags & (RTF_GATEWAY | RTF_NONEXTHOP)) { rt->rt6i_nexthop = __neigh_lookup_errno(&nd_tbl, &rt->rt6i_gateway, dev); if (IS_ERR(rt->rt6i_nexthop)) { @@ -2037,6 +2047,55 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, return rt; } +int ip6_route_get_saddr(struct net *net, + struct rt6_info *rt, + struct in6_addr *daddr, + unsigned int prefs, + struct in6_addr *saddr) +{ + struct inet6_dev *idev = ip6_dst_idev((struct dst_entry*)rt); + int err = 0; + if (rt->rt6i_prefsrc.plen) + ipv6_addr_copy(saddr, &rt->rt6i_prefsrc.addr); + else + err = ipv6_dev_get_saddr(net, idev ? idev->dev : NULL, + daddr, prefs, saddr); + return err; +} + +/* remove deleted ip from prefsrc entries */ +struct arg_dev_net_ip { + struct net_device *dev; + struct net *net; + struct in6_addr *addr; +}; + +static int fib6_remove_prefsrc(struct rt6_info *rt, void *arg) +{ + struct net_device *dev = ((struct arg_dev_net_ip *)arg)->dev; + struct net *net = ((struct arg_dev_net_ip *)arg)->net; + struct in6_addr *addr = ((struct arg_dev_net_ip *)arg)->addr; + + if (((void *)rt->rt6i_dev == dev || dev == NULL) && + rt != net->ipv6.ip6_null_entry && + ipv6_addr_equal(addr, &rt->rt6i_prefsrc.addr)) { + /* remove prefsrc entry */ + rt->rt6i_prefsrc.plen = 0; + } + return 0; +} + +void rt6_remove_prefsrc(struct inet6_ifaddr *ifp) +{ + struct net *net = dev_net(ifp->idev->dev); + struct arg_dev_net_ip adni = { + .dev = ifp->idev->dev, + .net = net, + .addr = &ifp->addr, + }; + fib6_clean_all(net, fib6_remove_prefsrc, 0, &adni); +} + struct arg_dev_net { struct net_device *dev; struct net *net; @@ -2183,6 +2242,9 @@ static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh, nla_memcpy(&cfg->fc_src, tb[RTA_SRC], plen); } + if (tb[RTA_PREFSRC]) + nla_memcpy(&cfg->fc_prefsrc, tb[RTA_PREFSRC], 16); + if (tb[RTA_OIF]) cfg->fc_ifindex = nla_get_u32(tb[RTA_OIF]); @@ -2325,13 +2387,17 @@ static int rt6_fill_node(struct net *net, #endif NLA_PUT_U32(skb, RTA_IIF, iif); } else if (dst) { - struct inet6_dev *idev = ip6_dst_idev(&rt->dst); struct in6_addr saddr_buf; - if (ipv6_dev_get_saddr(net, idev ? idev->dev : NULL, - dst, 0, &saddr_buf) == 0) + if (ip6_route_get_saddr(net, rt, dst, 0, &saddr_buf) == 0) NLA_PUT(skb, RTA_PREFSRC, 16, &saddr_buf); } + if (rt->rt6i_prefsrc.plen) { + struct in6_addr saddr_buf; + ipv6_addr_copy(&saddr_buf, &rt->rt6i_prefsrc.addr); + NLA_PUT(skb, RTA_PREFSRC, 16, &saddr_buf); + } + if (rtnetlink_put_metrics(skb, dst_metrics_ptr(&rt->dst)) < 0) goto nla_put_failure; |