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netpoll: fix position of network header

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Similar to the problem in pktgen, netpoll uses skb_tail_offset()
too, as the code is copied from pktgen.

Also use return values of skb_put() directly, this will simiplify
the code.

Reported-by: Thomas Graf <tgraf@suug.ch>
Cc: Thomas Graf <tgraf@suug.ch>
Cc: Daniel Borkmann <dborkmann@redhat.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Amerigo Wang 2013-06-03 16:31:36 +00:00 committed by David S. Miller
parent 525cebedb3
commit 00f97da17a
1 changed files with 4 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
net/core/netpoll.c
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@ -676,8 +676,6 @@ static void netpoll_neigh_reply(struct sk_buff *skb, struct netpoll_info *npinfo
spin_lock_irqsave(&npinfo->rx_lock, flags);
list_for_each_entry_safe(np, tmp, &npinfo->rx_np, rx) {
unsigned long tail_offset;
if (!ipv6_addr_equal(daddr, &np->local_ip.in6))
continue;
@ -691,30 +689,20 @@ static void netpoll_neigh_reply(struct sk_buff *skb, struct netpoll_info *npinfo
send_skb->dev = skb->dev;
skb_reset_network_header(send_skb);
skb_put(send_skb, sizeof(struct ipv6hdr));
hdr = ipv6_hdr(send_skb);
hdr = (struct ipv6hdr *) skb_put(send_skb, sizeof(struct ipv6hdr));
*(__be32*)hdr = htonl(0x60000000);
hdr->payload_len = htons(size);
hdr->nexthdr = IPPROTO_ICMPV6;
hdr->hop_limit = 255;
hdr->saddr = *saddr;
hdr->daddr = *daddr;
tail_offset = skb_tail_offset(skb);
if (tail_offset > 0xffff) {
kfree_skb(send_skb);
continue;
}
skb_set_network_header(send_skb, tail_offset);
skb_put(send_skb, size);
icmp6h = (struct icmp6hdr *)skb_transport_header(skb);
icmp6h = (struct icmp6hdr *) skb_put(send_skb, sizeof(struct icmp6hdr));
icmp6h->icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
icmp6h->icmp6_router = 0;
icmp6h->icmp6_solicited = 1;
target = (struct in6_addr *)(skb_transport_header(send_skb) + sizeof(struct icmp6hdr));
target = (struct in6_addr *) skb_put(send_skb, sizeof(struct in6_addr));
*target = msg->target;
icmp6h->icmp6_cksum = csum_ipv6_magic(saddr, daddr, size,
IPPROTO_ICMPV6,