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authorAmerigo Wang <amwang@redhat.com>2013-06-03 16:31:36 +0000
committerDavid S. Miller <davem@davemloft.net>2013-06-04 17:37:04 -0700
commit00f97da17a0c8d656d0c9a60b1d7f38735f69817 (patch)
tree472a9a30b7367331d97ac9c7bead437d5f4227b2 /net/core
parent525cebedb32a87fa48584bc44e14170beb2c10d1 (diff)
downloadlinux-00f97da17a0c8d656d0c9a60b1d7f38735f69817.tar.bz2
netpoll: fix position of network header
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>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/netpoll.c20
1 files changed, 4 insertions, 16 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 688517c7ff17..03c8ec3edc72 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -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,