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    Subject[PATCH net-next] net: PIM register decapsulation and Forwarding.
    Date
    PIM register packet is decapsulated but not forwarded in RP

    __pim_rcv decapsulates the PIM register packet and reinjects for forwarding
    after replacing the skb->dev to reg_dev (vif with VIFF_Register)

    Ideally the incoming device should be same as skb->dev where the
    original PIM register packet is received. mcache would not have
    reg_vif as IIF. Decapsulated packet forwarding is failing
    because of IIF mismatch. In RP for this S,G RPF interface would be
    skb->dev vif only, so that would be IIF for the cache entry.

    Signed-off-by: Saranya Panjarathina <plsaranya@gmail.com>
    ---
    net/ipv4/ipmr.c | 2 +-
    net/ipv6/ip6mr.c | 2 +-
    2 files changed, 2 insertions(+), 2 deletions(-)

    diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
    index 13e6329784fb..7b9586335fb7 100644
    --- a/net/ipv4/ipmr.c
    +++ b/net/ipv4/ipmr.c
    @@ -598,7 +598,7 @@ static int __pim_rcv(struct mr_table *mrt, struct sk_buff *skb,
    skb->protocol = htons(ETH_P_IP);
    skb->ip_summed = CHECKSUM_NONE;

    - skb_tunnel_rx(skb, reg_dev, dev_net(reg_dev));
    + skb_tunnel_rx(skb, skb->dev, dev_net(skb->dev));

    netif_rx(skb);

    diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
    index 4e74bc61a3db..147e29a818ca 100644
    --- a/net/ipv6/ip6mr.c
    +++ b/net/ipv6/ip6mr.c
    @@ -566,7 +566,7 @@ static int pim6_rcv(struct sk_buff *skb)
    skb->protocol = htons(ETH_P_IPV6);
    skb->ip_summed = CHECKSUM_NONE;

    - skb_tunnel_rx(skb, reg_dev, dev_net(reg_dev));
    + skb_tunnel_rx(skb, skb->dev, net);

    netif_rx(skb);

    --
    2.20.1
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