Messages in this thread Patch in this message |  | | From | Thomas Winter <> | Subject | [PATCH 2/2] ip/ip6_gre: Fix non-point-to-point tunnel not generating IPv6 link local address | Date | Mon, 19 Dec 2022 14:06:19 +1300 |
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Previously, addrconf_gre_config always would call addrconf_addr_gen and generate a EUI64 link local address for the tunnel. Then commit e5dd729460ca changed the code path so that add_v4_addrs is called but this only generates a compat IPv6 address for non-point-to-point tunnels.
I assume the compat address is specifically for SIT tunnels so have kept that only for SIT - GRE tunnels now always generate link local addresses.
Fixes: e5dd729460ca ("ip/ip6_gre: use the same logic as SIT interfaces when computing v6LL address") Signed-off-by: Thomas Winter <Thomas.Winter@alliedtelesis.co.nz> --- net/ipv6/addrconf.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index e9d7ec03316d..a51fb106fa4a 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -3129,17 +3129,17 @@ static void add_v4_addrs(struct inet6_dev *idev) offset = sizeof(struct in6_addr) - 4; memcpy(&addr.s6_addr32[3], idev->dev->dev_addr + offset, 4); - if (idev->dev->flags&IFF_POINTOPOINT) { + if (!(idev->dev->flags & IFF_POINTOPOINT) && idev->dev->type == ARPHRD_SIT) { + scope = IPV6_ADDR_COMPATv4; + plen = 96; + pflags |= RTF_NONEXTHOP; + } else { if (idev->cnf.addr_gen_mode == IN6_ADDR_GEN_MODE_NONE) return; addr.s6_addr32[0] = htonl(0xfe800000); scope = IFA_LINK; plen = 64; - } else { - scope = IPV6_ADDR_COMPATv4; - plen = 96; - pflags |= RTF_NONEXTHOP; } if (addr.s6_addr32[3]) { -- 2.37.3
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