diff options
| author | David Ahern <dsahern@gmail.com> | 2019-04-06 01:30:29 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-04-09 00:22:40 +0200 |
| commit | 0f5f7d7bf6e6bda4dffe7b42812a16ada6ea9816 (patch) | |
| tree | 20c54a4846f8631c1d2af99085fbdce2c44283ae /net/ipv4/route.c | |
| parent | ipv4: Prepare fib_config for IPv6 gateway (diff) | |
| download | linux-0f5f7d7bf6e6bda4dffe7b42812a16ada6ea9816.tar.xz linux-0f5f7d7bf6e6bda4dffe7b42812a16ada6ea9816.zip | |
ipv4: Add support to rtable for ipv6 gateway
Add support for an IPv6 gateway to rtable. Since a gateway is either
IPv4 or IPv6, make it a union with rt_gw4 where rt_gw_family decides
which address is in use.
When dumping the route data, encode an ipv6 nexthop using RTA_VIA.
Signed-off-by: David Ahern <dsahern@gmail.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/route.c')
| -rw-r--r-- | net/ipv4/route.c | 31 |
1 files changed, 26 insertions, 5 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index b77b4950d0c7..6e58acf0a87b 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1535,14 +1535,20 @@ static void rt_set_nexthop(struct rtable *rt, __be32 daddr, if (fi) { struct fib_nh_common *nhc = FIB_RES_NHC(*res); - struct fib_nh *nh = container_of(nhc, struct fib_nh, nh_common); + struct fib_nh *nh; - if (nh->fib_nh_gw4 && nh->fib_nh_scope == RT_SCOPE_LINK) { - rt->rt_gw4 = nh->fib_nh_gw4; - rt->rt_gw_family = AF_INET; + if (nhc->nhc_gw_family && nhc->nhc_scope == RT_SCOPE_LINK) { + rt->rt_gw_family = nhc->nhc_gw_family; + /* only INET and INET6 are supported */ + if (likely(nhc->nhc_gw_family == AF_INET)) + rt->rt_gw4 = nhc->nhc_gw.ipv4; + else + rt->rt_gw6 = nhc->nhc_gw.ipv6; } + ip_dst_init_metrics(&rt->dst, fi->fib_metrics); + nh = container_of(nhc, struct fib_nh, nh_common); #ifdef CONFIG_IP_ROUTE_CLASSID rt->dst.tclassid = nh->nh_tclassid; #endif @@ -2600,6 +2606,8 @@ struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_or rt->rt_gw_family = ort->rt_gw_family; if (rt->rt_gw_family == AF_INET) rt->rt_gw4 = ort->rt_gw4; + else if (rt->rt_gw_family == AF_INET6) + rt->rt_gw6 = ort->rt_gw6; INIT_LIST_HEAD(&rt->rt_uncached); } @@ -2679,8 +2687,21 @@ static int rt_fill_info(struct net *net, __be32 dst, __be32 src, goto nla_put_failure; } if (rt->rt_gw_family == AF_INET && - nla_put_in_addr(skb, RTA_GATEWAY, rt->rt_gw4)) + nla_put_in_addr(skb, RTA_GATEWAY, rt->rt_gw4)) { goto nla_put_failure; + } else if (rt->rt_gw_family == AF_INET6) { + int alen = sizeof(struct in6_addr); + struct nlattr *nla; + struct rtvia *via; + + nla = nla_reserve(skb, RTA_VIA, alen + 2); + if (!nla) + goto nla_put_failure; + + via = nla_data(nla); + via->rtvia_family = AF_INET6; + memcpy(via->rtvia_addr, &rt->rt_gw6, alen); + } expires = rt->dst.expires; if (expires) { |