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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2011-10-06 10:28:31 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-10-18 23:22:07 -0400 |
| commit | bc416d9768aa9a2e46eb11354a9c58399dafeb01 (patch) | |
| tree | a3ecf948353d11d199dfb64b0c4302c5b4aaccb6 /net/packet | |
| parent | f7ba35da583cf6aefba887a8dcf86acec4f3a350 (diff) | |
| download | linux-bc416d9768aa9a2e46eb11354a9c58399dafeb01.tar.gz linux-bc416d9768aa9a2e46eb11354a9c58399dafeb01.tar.bz2 linux-bc416d9768aa9a2e46eb11354a9c58399dafeb01.zip | |
macvlan: handle fragmented multicast frames
Fragmented multicast frames are delivered to a single macvlan port,
because ip defrag logic considers other samples are redundant.
Implement a defrag step before trying to send the multicast frame.
Reported-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/packet')
| -rw-r--r-- | net/packet/af_packet.c | 39 |
1 files changed, 1 insertions, 38 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 7b5f03253016..03bb45adf2fc 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -1213,43 +1213,6 @@ static struct sock *fanout_demux_cpu(struct packet_fanout *f, struct sk_buff *sk return f->arr[cpu % num]; } -static struct sk_buff *fanout_check_defrag(struct sk_buff *skb) -{ -#ifdef CONFIG_INET - const struct iphdr *iph; - u32 len; - - if (skb->protocol != htons(ETH_P_IP)) - return skb; - - if (!pskb_may_pull(skb, sizeof(struct iphdr))) - return skb; - - iph = ip_hdr(skb); - if (iph->ihl < 5 || iph->version != 4) - return skb; - if (!pskb_may_pull(skb, iph->ihl*4)) - return skb; - iph = ip_hdr(skb); - len = ntohs(iph->tot_len); - if (skb->len < len || len < (iph->ihl * 4)) - return skb; - - if (ip_is_fragment(ip_hdr(skb))) { - skb = skb_share_check(skb, GFP_ATOMIC); - if (skb) { - if (pskb_trim_rcsum(skb, len)) - return skb; - memset(IPCB(skb), 0, sizeof(struct inet_skb_parm)); - if (ip_defrag(skb, IP_DEFRAG_AF_PACKET)) - return NULL; - skb->rxhash = 0; - } - } -#endif - return skb; -} - static int packet_rcv_fanout(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) { @@ -1268,7 +1231,7 @@ static int packet_rcv_fanout(struct sk_buff *skb, struct net_device *dev, case PACKET_FANOUT_HASH: default: if (f->defrag) { - skb = fanout_check_defrag(skb); + skb = ip_check_defrag(skb, IP_DEFRAG_AF_PACKET); if (!skb) return 0; } |